Adding upstream version 127.0.upstream/127.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

235 files changed, 20787 insertions, 2367 deletions

diff --git a/dom/media/AsyncLogger.h b/dom/media/AsyncLogger.h
index adc4101382..2dedabea7c 100644
--- a/dom/media/AsyncLogger.h
+++ b/dom/media/AsyncLogger.h
@@ -17,7 +17,7 @@
 #include "mozilla/Sprintf.h"
 #include "mozilla/TimeStamp.h"
 #include "GeckoProfiler.h"
-#include "MPSCQueue.h"
+#include "mozilla/dom/MPSCQueue.h"
 
 #if defined(_WIN32)
 #  include <process.h>
diff --git a/dom/media/AudioInputSource.cpp b/dom/media/AudioInputSource.cpp
index 1ba2d81938..ef471530d6 100644
--- a/dom/media/AudioInputSource.cpp
+++ b/dom/media/AudioInputSource.cpp
@@ -55,46 +55,63 @@ AudioInputSource::AudioInputSource(RefPtr<EventListener>&& aListener,
       mSandboxed(CubebUtils::SandboxEnabled()),
       mAudioThreadId(ProfilerThreadId{}),
       mEventListener(std::move(aListener)),
-      mTaskThread(CUBEB_TASK_THREAD),
+      mTaskThread(CubebUtils::GetCubebOperationThread()),
       mDriftCorrector(static_cast<uint32_t>(aSourceRate),
                       static_cast<uint32_t>(aTargetRate), aPrincipalHandle) {
   MOZ_ASSERT(mChannelCount > 0);
   MOZ_ASSERT(mEventListener);
 }
 
-void AudioInputSource::Start() {
+void AudioInputSource::Init() {
   // This is called on MediaTrackGraph's graph thread, which can be the cubeb
   // stream's callback thread. Running cubeb operations within cubeb stream
   // callback thread can cause the deadlock on Linux, so we dispatch those
   // operations to the task thread.
   MOZ_ASSERT(mTaskThread);
 
-  LOG("AudioInputSource %p, start", this);
+  LOG("AudioInputSource %p, init", this);
   MOZ_ALWAYS_SUCCEEDS(mTaskThread->Dispatch(
-      NS_NewRunnableFunction(__func__, [self = RefPtr(this)]() mutable {
-        self->mStream = CubebInputStream::Create(
-            self->mDeviceId, self->mChannelCount,
-            static_cast<uint32_t>(self->mRate), self->mIsVoice, self.get());
-        if (!self->mStream) {
+      NS_NewRunnableFunction(__func__, [this, self = RefPtr(this)]() mutable {
+        mStream = CubebInputStream::Create(mDeviceId, mChannelCount,
+                                           static_cast<uint32_t>(mRate),
+                                           mIsVoice, this);
+        if (!mStream) {
           LOGE("AudioInputSource %p, cannot create an audio input stream!",
                self.get());
           return;
         }
+      })));
+}
 
-        if (uint32_t latency = 0;
-            self->mStream->Latency(&latency) == CUBEB_OK) {
-          Data data(LatencyChangeData{media::TimeUnit(latency, self->mRate)});
-          if (self->mSPSCQueue.Enqueue(data) == 0) {
+void AudioInputSource::Start() {
+  // This is called on MediaTrackGraph's graph thread, which can be the cubeb
+  // stream's callback thread. Running cubeb operations within cubeb stream
+  // callback thread can cause the deadlock on Linux, so we dispatch those
+  // operations to the task thread.
+  MOZ_ASSERT(mTaskThread);
+
+  LOG("AudioInputSource %p, start", this);
+  MOZ_ALWAYS_SUCCEEDS(mTaskThread->Dispatch(
+      NS_NewRunnableFunction(__func__, [this, self = RefPtr(this)]() mutable {
+        if (!mStream) {
+          LOGE("AudioInputSource %p, no audio input stream!", self.get());
+          return;
+        }
+
+        if (uint32_t latency = 0; mStream->Latency(&latency) == CUBEB_OK) {
+          Data data(LatencyChangeData{media::TimeUnit(latency, mRate)});
+          if (mSPSCQueue.Enqueue(data) == 0) {
             LOGE("AudioInputSource %p, failed to enqueue latency change",
                  self.get());
           }
         }
-        if (int r = self->mStream->Start(); r != CUBEB_OK) {
+        if (int r = mStream->Start(); r != CUBEB_OK) {
           LOGE(
               "AudioInputSource %p, cannot start its audio input stream! The "
               "stream is destroyed directly!",
               self.get());
-          self->mStream = nullptr;
+          mStream = nullptr;
+          mConfiguredProcessingParams = CUBEB_INPUT_PROCESSING_PARAM_NONE;
         }
       })));
 }
@@ -108,20 +125,72 @@ void AudioInputSource::Stop() {
 
   LOG("AudioInputSource %p, stop", this);
   MOZ_ALWAYS_SUCCEEDS(mTaskThread->Dispatch(
-      NS_NewRunnableFunction(__func__, [self = RefPtr(this)]() mutable {
-        if (!self->mStream) {
+      NS_NewRunnableFunction(__func__, [this, self = RefPtr(this)]() mutable {
+        if (!mStream) {
           LOGE("AudioInputSource %p, has no audio input stream to stop!",
                self.get());
           return;
         }
-        if (int r = self->mStream->Stop(); r != CUBEB_OK) {
+        if (int r = mStream->Stop(); r != CUBEB_OK) {
           LOGE(
               "AudioInputSource %p, cannot stop its audio input stream! The "
               "stream is going to be destroyed forcefully",
               self.get());
         }
-        self->mStream = nullptr;
+        mStream = nullptr;
+        mConfiguredProcessingParams = CUBEB_INPUT_PROCESSING_PARAM_NONE;
+      })));
+}
+
+auto AudioInputSource::SetRequestedProcessingParams(
+    cubeb_input_processing_params aParams)
+    -> RefPtr<SetRequestedProcessingParamsPromise> {
+  // This is called on MediaTrackGraph's graph thread, which can be the cubeb
+  // stream's callback thread. Running cubeb operations within cubeb stream
+  // callback thread can cause the deadlock on Linux, so we dispatch those
+  // operations to the task thread.
+  MOZ_ASSERT(mTaskThread);
+
+  LOG("AudioInputSource %p, SetProcessingParams(%s)", this,
+      CubebUtils::ProcessingParamsToString(aParams).get());
+  using ProcessingPromise = SetRequestedProcessingParamsPromise;
+  MozPromiseHolder<ProcessingPromise> holder;
+  RefPtr<ProcessingPromise> p = holder.Ensure(__func__);
+  MOZ_ALWAYS_SUCCEEDS(mTaskThread->Dispatch(NS_NewRunnableFunction(
+      __func__, [this, self = RefPtr(this), holder = std::move(holder),
+                 aParams]() mutable {
+        if (!mStream) {
+          LOGE(
+              "AudioInputSource %p, has no audio input stream to set "
+              "processing params on!",
+              this);
+          holder.Reject(CUBEB_ERROR,
+                        "AudioInputSource::SetProcessingParams no stream");
+          return;
+        }
+        cubeb_input_processing_params supportedParams;
+        auto handle = CubebUtils::GetCubeb();
+        int r = cubeb_get_supported_input_processing_params(handle->Context(),
+                                                            &supportedParams);
+        if (r != CUBEB_OK) {
+          holder.Reject(CUBEB_ERROR_NOT_SUPPORTED,
+                        "AudioInputSource::SetProcessingParams");
+          return;
+        }
+        aParams &= supportedParams;
+        if (aParams == mConfiguredProcessingParams) {
+          holder.Resolve(aParams, "AudioInputSource::SetProcessingParams");
+          return;
+        }
+        mConfiguredProcessingParams = aParams;
+        r = mStream->SetProcessingParams(aParams);
+        if (r == CUBEB_OK) {
+          holder.Resolve(aParams, "AudioInputSource::SetProcessingParams");
+          return;
+        }
+        holder.Reject(r, "AudioInputSource::SetProcessingParams");
       })));
+  return p;
 }
 
 AudioSegment AudioInputSource::GetAudioSegment(TrackTime aDuration,
diff --git a/dom/media/AudioInputSource.h b/dom/media/AudioInputSource.h
index b44a3ae43a..8f69165719 100644
--- a/dom/media/AudioInputSource.h
+++ b/dom/media/AudioInputSource.h
@@ -12,6 +12,7 @@
 #include "CubebInputStream.h"
 #include "CubebUtils.h"
 #include "TimeUnits.h"
+#include "mozilla/MozPromise.h"
 #include "mozilla/ProfilerUtils.h"
 #include "mozilla/RefPtr.h"
 #include "mozilla/SPSCQueue.h"
@@ -54,10 +55,17 @@ class AudioInputSource : public CubebInputStream::Listener {
 
   // The following functions should always be called in the same thread: They
   // are always run on MediaTrackGraph's graph thread.
+  // Sets up mStream.
+  void Init();
   // Starts producing audio data.
   void Start();
   // Stops producing audio data.
   void Stop();
+  // Set the params to be applied in the platform for this source.
+  using SetRequestedProcessingParamsPromise =
+      MozPromise<cubeb_input_processing_params, int, true>;
+  RefPtr<SetRequestedProcessingParamsPromise> SetRequestedProcessingParams(
+      cubeb_input_processing_params aParams);
   // Returns the AudioSegment with aDuration of data inside.
   // The graph thread can change behind the scene, e.g., cubeb stream reinit due
   // to default output device changed). When this happens, we need to notify
@@ -118,6 +126,11 @@ class AudioInputSource : public CubebInputStream::Listener {
   // An input-only cubeb stream operated within mTaskThread.
   UniquePtr<CubebInputStream> mStream;
 
+  // The params configured on the cubeb stream, after filtering away unsupported
+  // params. mTaskThread only.
+  cubeb_input_processing_params mConfiguredProcessingParams =
+      CUBEB_INPUT_PROCESSING_PARAM_NONE;
+
   struct Empty {};
 
   struct LatencyChangeData {
diff --git a/dom/media/AudioRingBuffer.cpp b/dom/media/AudioRingBuffer.cpp
index 475de653b8..cbeb64a2f6 100644
--- a/dom/media/AudioRingBuffer.cpp
+++ b/dom/media/AudioRingBuffer.cpp
@@ -270,10 +270,13 @@ class RingBuffer final {
    * Re-allocates memory if a larger buffer is requested than what is already
    * allocated.
    */
-  bool SetLengthBytes(uint32_t aLengthBytes) {
+  bool EnsureLengthBytes(uint32_t aLengthBytes) {
     MOZ_ASSERT(aLengthBytes % sizeof(T) == 0,
                "Length in bytes is not a whole number of samples");
 
+    if (mMemoryBuffer.Length() >= aLengthBytes) {
+      return true;
+    }
     uint32_t lengthSamples = aLengthBytes / sizeof(T);
     uint32_t oldLengthSamples = Capacity();
     uint32_t availableRead = AvailableRead();
@@ -530,14 +533,17 @@ uint32_t AudioRingBuffer::Clear() {
   return mPtr->mFloatRingBuffer->Clear();
 }
 
-bool AudioRingBuffer::SetLengthBytes(uint32_t aLengthBytes) {
+bool AudioRingBuffer::EnsureLengthBytes(uint32_t aLengthBytes) {
   if (mPtr->mFloatRingBuffer) {
-    return mPtr->mFloatRingBuffer->SetLengthBytes(aLengthBytes);
+    return mPtr->mFloatRingBuffer->EnsureLengthBytes(aLengthBytes);
   }
   if (mPtr->mIntRingBuffer) {
-    return mPtr->mIntRingBuffer->SetLengthBytes(aLengthBytes);
+    return mPtr->mIntRingBuffer->EnsureLengthBytes(aLengthBytes);
   }
   if (mPtr->mBackingBuffer) {
+    if (mPtr->mBackingBuffer->Length() >= aLengthBytes) {
+      return true;
+    }
     return mPtr->mBackingBuffer->SetLength(aLengthBytes);
   }
   MOZ_ASSERT_UNREACHABLE("Unexpected");
diff --git a/dom/media/AudioRingBuffer.h b/dom/media/AudioRingBuffer.h
index 892a7cd408..a08211ba15 100644
--- a/dom/media/AudioRingBuffer.h
+++ b/dom/media/AudioRingBuffer.h
@@ -93,12 +93,12 @@ class AudioRingBuffer final {
   uint32_t Clear();
 
   /**
-   * Set the length of the ring buffer in bytes. Must be divisible by the sample
-   * size. Will not deallocate memory if the underlying buffer is large enough.
-   * Returns false if setting the length requires allocating memory and the
-   * allocation fails.
+   * Increase the ring buffer size if necessary to at least the specified length
+   * in bytes. Must be divisible by the sample size.
+   * Will not deallocate memory if the underlying buffer is large enough.
+   * Returns false if memory allocation is required and fails.
    */
-  bool SetLengthBytes(uint32_t aLengthBytes);
+  bool EnsureLengthBytes(uint32_t aLengthBytes);
 
   /**
    * Return the number of samples this buffer can hold.
diff --git a/dom/media/AudioStream.cpp b/dom/media/AudioStream.cpp
index 7d80a3738e..bb0248d942 100644
--- a/dom/media/AudioStream.cpp
+++ b/dom/media/AudioStream.cpp
@@ -316,7 +316,8 @@ void AudioStream::SetStreamName(const nsAString& aStreamName) {
   }
 
   MonitorAutoLock mon(mMonitor);
-  if (InvokeCubeb(cubeb_stream_set_name, aRawStreamName.get()) != CUBEB_OK) {
+  int r = InvokeCubeb(cubeb_stream_set_name, aRawStreamName.get());
+  if (r && r != CUBEB_ERROR_NOT_SUPPORTED) {
     LOGE("Could not set cubeb stream name.");
   }
 }
diff --git a/dom/media/AudioStream.h b/dom/media/AudioStream.h
index 11a61b9fe7..708278314d 100644
--- a/dom/media/AudioStream.h
+++ b/dom/media/AudioStream.h
@@ -333,7 +333,7 @@ class AudioStream final {
   const AudioConfig::ChannelLayout::ChannelMap mChannelMap;
 
   // The monitor is held to protect all access to member variables below.
-  Monitor mMonitor MOZ_UNANNOTATED;
+  Monitor mMonitor;
 
   const uint32_t mOutChannels;
 
diff --git a/dom/media/ChannelMediaResource.cpp b/dom/media/ChannelMediaResource.cpp
index aefedb37d1..15f048d735 100644
--- a/dom/media/ChannelMediaResource.cpp
+++ b/dom/media/ChannelMediaResource.cpp
@@ -227,7 +227,7 @@ nsresult ChannelMediaResource::OnStartRequest(nsIRequest* aRequest,
         // at this stage.
         //       For now, tell the decoder that the stream is infinite.
         if (rangeTotal != -1) {
-          contentLength = std::max(contentLength, rangeTotal);
+          length = std::max(contentLength, rangeTotal);
         }
       }
       acceptsRanges = gotRangeHeader;
@@ -240,11 +240,9 @@ nsresult ChannelMediaResource::OnStartRequest(nsIRequest* aRequest,
         // to assume seeking doesn't work.
         acceptsRanges = false;
       }
-    }
-    if (aRequestOffset == 0 && contentLength >= 0 &&
-        (responseStatus == HTTP_OK_CODE ||
-         responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
-      length = contentLength;
+      if (contentLength >= 0) {
+        length = contentLength;
+      }
     }
     // XXX we probably should examine the Content-Range header in case
     // the server gave us a range which is not quite what we asked for
@@ -488,9 +486,9 @@ int64_t ChannelMediaResource::CalculateStreamLength() const {
   bool gotRangeHeader = NS_SUCCEEDED(
       ParseContentRangeHeader(hc, rangeStart, rangeEnd, rangeTotal));
   if (gotRangeHeader && rangeTotal != -1) {
-    contentLength = std::max(contentLength, rangeTotal);
+    return std::max(contentLength, rangeTotal);
   }
-  return contentLength;
+  return -1;
 }
 
 nsresult ChannelMediaResource::Open(nsIStreamListener** aStreamListener) {
diff --git a/dom/media/CubebInputStream.cpp b/dom/media/CubebInputStream.cpp
index 38b66315f9..55677d2dc1 100644
--- a/dom/media/CubebInputStream.cpp
+++ b/dom/media/CubebInputStream.cpp
@@ -129,7 +129,7 @@ CubebInputStream::CubebInputStream(
 
 void CubebInputStream::Init() {
   // cubeb_stream_register_device_changed_callback is only supported on macOS
-  // platform and MockCubebfor now.
+  // platform and MockCubeb for now.
   InvokeCubebWithLog(cubeb_stream_register_device_changed_callback,
                      CubebInputStream::DeviceChangedCallback_s);
 }
@@ -138,6 +138,11 @@ int CubebInputStream::Start() { return InvokeCubebWithLog(cubeb_stream_start); }
 
 int CubebInputStream::Stop() { return InvokeCubebWithLog(cubeb_stream_stop); }
 
+int CubebInputStream::SetProcessingParams(
+    cubeb_input_processing_params aParams) {
+  return InvokeCubebWithLog(cubeb_stream_set_input_processing_params, aParams);
+}
+
 int CubebInputStream::Latency(uint32_t* aLatencyFrames) {
   return InvokeCubebWithLog(cubeb_stream_get_input_latency, aLatencyFrames);
 }
diff --git a/dom/media/CubebInputStream.h b/dom/media/CubebInputStream.h
index a35924a976..107d0f4f6e 100644
--- a/dom/media/CubebInputStream.h
+++ b/dom/media/CubebInputStream.h
@@ -51,6 +51,9 @@ class CubebInputStream final {
   // Stop producing audio data.
   int Stop();
 
+  // Apply the given processing params.
+  int SetProcessingParams(cubeb_input_processing_params aParams);
+
   // Gets the approximate stream latency in frames.
   int Latency(uint32_t* aLatencyFrames);
 
diff --git a/dom/media/CubebUtils.cpp b/dom/media/CubebUtils.cpp
index dbdab3a56a..3c93e65095 100644
--- a/dom/media/CubebUtils.cpp
+++ b/dom/media/CubebUtils.cpp
@@ -14,6 +14,7 @@
 #include "mozilla/Logging.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/Components.h"
+#include "mozilla/SharedThreadPool.h"
 #include "mozilla/Sprintf.h"
 #include "mozilla/StaticMutex.h"
 #include "mozilla/StaticPtr.h"
@@ -186,6 +187,43 @@ static const uint32_t CUBEB_NORMAL_LATENCY_MS = 100;
 static const uint32_t CUBEB_NORMAL_LATENCY_FRAMES = 1024;
 
 namespace CubebUtils {
+nsCString ProcessingParamsToString(cubeb_input_processing_params aParams) {
+  if (aParams == CUBEB_INPUT_PROCESSING_PARAM_NONE) {
+    return "NONE"_ns;
+  }
+  nsCString str;
+  for (auto p : {CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                 CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL,
+                 CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+                 CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION}) {
+    if (!(aParams & p)) {
+      continue;
+    }
+    if (!str.IsEmpty()) {
+      str.Append(" | ");
+    }
+    str.Append([&p] {
+      switch (p) {
+        case CUBEB_INPUT_PROCESSING_PARAM_NONE:
+          // Handled above.
+          MOZ_CRASH(
+              "NONE is the absence of a param, thus not for logging here.");
+        case CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION:
+          return "AEC";
+        case CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL:
+          return "AGC";
+        case CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION:
+          return "NS";
+        case CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION:
+          return "VOICE";
+      }
+      MOZ_ASSERT_UNREACHABLE("Unexpected input processing param");
+      return "<Unknown input processing param>";
+    }());
+  }
+  return str;
+}
+
 RefPtr<CubebHandle> GetCubebUnlocked();
 
 void GetPrefAndSetString(const char* aPref, StaticAutoPtr<char>& aStorage) {
@@ -765,6 +803,13 @@ bool SandboxEnabled() {
 #endif
 }
 
+already_AddRefed<SharedThreadPool> GetCubebOperationThread() {
+  RefPtr<SharedThreadPool> pool = SharedThreadPool::Get("CubebOperation"_ns, 1);
+  const uint32_t kIdleThreadTimeoutMs = 2000;
+  pool->SetIdleThreadTimeout(PR_MillisecondsToInterval(kIdleThreadTimeoutMs));
+  return pool.forget();
+}
+
 uint32_t MaxNumberOfChannels() {
   RefPtr<CubebHandle> handle = GetCubeb();
   uint32_t maxNumberOfChannels;
diff --git a/dom/media/CubebUtils.h b/dom/media/CubebUtils.h
index c05c8d2449..a59d72bbd6 100644
--- a/dom/media/CubebUtils.h
+++ b/dom/media/CubebUtils.h
@@ -16,10 +16,12 @@
 class AudioDeviceInfo;
 
 MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(cubeb_stream_prefs)
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(cubeb_input_processing_params)
 
 namespace mozilla {
 
 class CallbackThreadRegistry;
+class SharedThreadPool;
 
 namespace CubebUtils {
 
@@ -35,6 +37,8 @@ struct ToCubebFormat<AUDIO_FORMAT_S16> {
   static const cubeb_sample_format value = CUBEB_SAMPLE_S16NE;
 };
 
+nsCString ProcessingParamsToString(cubeb_input_processing_params aParams);
+
 class CubebHandle {
  public:
   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CubebHandle)
@@ -62,6 +66,11 @@ void ShutdownLibrary();
 
 bool SandboxEnabled();
 
+// A thread pool containing only one thread to execute the cubeb operations. We
+// should always use this thread to init, destroy, start, or stop cubeb streams,
+// to avoid data racing or deadlock issues across platforms.
+already_AddRefed<SharedThreadPool> GetCubebOperationThread();
+
 // Returns the maximum number of channels supported by the audio hardware.
 uint32_t MaxNumberOfChannels();
 
diff --git a/dom/media/DeviceInputTrack.cpp b/dom/media/DeviceInputTrack.cpp
index 5d69f7107a..3bf2e87558 100644
--- a/dom/media/DeviceInputTrack.cpp
+++ b/dom/media/DeviceInputTrack.cpp
@@ -316,6 +316,20 @@ bool DeviceInputTrack::HasVoiceInput() const {
   return false;
 }
 
+cubeb_input_processing_params DeviceInputTrack::RequestedProcessingParams()
+    const {
+  AssertOnGraphThreadOrNotRunning();
+  Maybe<cubeb_input_processing_params> params;
+  for (const auto& listener : mListeners) {
+    if (params) {
+      *params &= listener->RequestedInputProcessingParams(mGraph);
+    } else {
+      params = Some(listener->RequestedInputProcessingParams(mGraph));
+    }
+  }
+  return params.valueOr(CUBEB_INPUT_PROCESSING_PARAM_NONE);
+}
+
 void DeviceInputTrack::DeviceChanged(MediaTrackGraph* aGraph) const {
   AssertOnGraphThreadOrNotRunning();
   MOZ_ASSERT(aGraph == mGraph,
@@ -326,6 +340,16 @@ void DeviceInputTrack::DeviceChanged(MediaTrackGraph* aGraph) const {
   }
 }
 
+void DeviceInputTrack::NotifySetRequestedProcessingParamsResult(
+    MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+    const Result<cubeb_input_processing_params, int>& aResult) {
+  AssertOnGraphThread();
+  for (const auto& listener : mListeners) {
+    listener->NotifySetRequestedInputProcessingParamsResult(
+        mGraph, aRequestedParams, aResult);
+  }
+}
+
 void DeviceInputTrack::ReevaluateInputDevice() {
   MOZ_ASSERT(NS_IsMainThread());
   QueueControlMessageWithNoShutdown([self = RefPtr{this}, this] {
@@ -491,6 +515,8 @@ void NonNativeInputTrack::ProcessInput(GraphTime aFrom, GraphTime aTo,
   // GraphRunner keeps the same thread.
   MOZ_ASSERT(!HasGraphThreadChanged());
 
+  ReevaluateProcessingParams();
+
   AudioSegment data = mAudioSource->GetAudioSegment(delta, consumer);
   MOZ_ASSERT(data.GetDuration() == delta);
   GetData<AudioSegment>()->AppendFrom(&data);
@@ -512,6 +538,8 @@ void NonNativeInputTrack::StartAudio(
   mGraphThreadId = std::this_thread::get_id();
 #endif
   mAudioSource = std::move(aAudioInputSource);
+  mAudioSource->Init();
+  ReevaluateProcessingParams();
   mAudioSource->Start();
 }
 
@@ -571,6 +599,35 @@ AudioInputSource::Id NonNativeInputTrack::GenerateSourceId() {
   return mSourceIdNumber++;
 }
 
+void NonNativeInputTrack::ReevaluateProcessingParams() {
+  AssertOnGraphThread();
+  MOZ_ASSERT(mAudioSource);
+  auto params = RequestedProcessingParams();
+  if (mRequestedProcessingParams == params) {
+    return;
+  }
+  mRequestedProcessingParams = params;
+  using Promise = AudioInputSource::SetRequestedProcessingParamsPromise;
+  mAudioSource->SetRequestedProcessingParams(params)->Then(
+      GetMainThreadSerialEventTarget(), __func__,
+      [this, self = RefPtr(this),
+       params](Promise::ResolveOrRejectValue&& aValue) {
+        if (IsDestroyed()) {
+          return;
+        }
+        auto result = ([&]() -> Result<cubeb_input_processing_params, int> {
+          if (aValue.IsResolve()) {
+            return aValue.ResolveValue();
+          }
+          return Err(aValue.RejectValue());
+        })();
+        QueueControlMessageWithNoShutdown(
+            [this, self = RefPtr(this), params, result = std::move(result)] {
+              NotifySetRequestedProcessingParamsResult(Graph(), params, result);
+            });
+      });
+}
+
 #ifdef DEBUG
 bool NonNativeInputTrack::HasGraphThreadChanged() {
   AssertOnGraphThread();
diff --git a/dom/media/DeviceInputTrack.h b/dom/media/DeviceInputTrack.h
index 0a92ded13c..8be53f415d 100644
--- a/dom/media/DeviceInputTrack.h
+++ b/dom/media/DeviceInputTrack.h
@@ -172,11 +172,19 @@ class DeviceInputTrack : public ProcessedMediaTrack {
 
   // Main thread API:
   const nsTArray<RefPtr<DeviceInputConsumerTrack>>& GetConsumerTracks() const;
+  // Handle the result of an async operation to set processing params on a cubeb
+  // stream. If the operation failed, signal this to listeners and then disable
+  // processing. If the operation succeeded, directly signal this to listeners.
+  void NotifySetRequestedProcessingParamsResult(
+      MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+      const Result<cubeb_input_processing_params, int>& aResult);
 
   // Graph thread APIs:
   // Query audio settings from its users.
   uint32_t MaxRequestedInputChannels() const;
   bool HasVoiceInput() const;
+  // Query for the aggregate processing params from all users.
+  cubeb_input_processing_params RequestedProcessingParams() const;
   // Deliver notification to its users.
   void DeviceChanged(MediaTrackGraph* aGraph) const;
 
@@ -265,6 +273,7 @@ class NonNativeInputTrack final : public DeviceInputTrack {
   void NotifyDeviceChanged(AudioInputSource::Id aSourceId);
   void NotifyInputStopped(AudioInputSource::Id aSourceId);
   AudioInputSource::Id GenerateSourceId();
+  void ReevaluateProcessingParams();
 
  private:
   ~NonNativeInputTrack() = default;
@@ -272,6 +281,8 @@ class NonNativeInputTrack final : public DeviceInputTrack {
   // Graph thread only.
   RefPtr<AudioInputSource> mAudioSource;
   AudioInputSource::Id mSourceIdNumber;
+  cubeb_input_processing_params mRequestedProcessingParams =
+      CUBEB_INPUT_PROCESSING_PARAM_NONE;
 
 #ifdef DEBUG
   // Graph thread only.
diff --git a/dom/media/EncoderTraits.cpp b/dom/media/EncoderTraits.cpp
index ba6d43f826..7abc8a0e14 100644
--- a/dom/media/EncoderTraits.cpp
+++ b/dom/media/EncoderTraits.cpp
@@ -14,4 +14,4 @@ bool Supports(const EncoderConfig& aConfig) {
   RefPtr<PEMFactory> pem = new PEMFactory();
   return pem->Supports(aConfig);
 }
-}
+}  // namespace mozilla::EncodeTraits
diff --git a/dom/media/ExternalEngineStateMachine.h b/dom/media/ExternalEngineStateMachine.h
index 83250b0f3c..e020695bcc 100644
--- a/dom/media/ExternalEngineStateMachine.h
+++ b/dom/media/ExternalEngineStateMachine.h
@@ -154,12 +154,12 @@ class ExternalEngineStateMachine final
         mSeekJob = SeekJob();
         mSeekJob.mTarget = Some(aTarget);
       }
-      void Resolve(const char* aCallSite) {
+      void Resolve(StaticString aCallSite) {
         MOZ_ASSERT(mSeekJob.Exists());
         mSeekJob.Resolve(aCallSite);
         mSeekJob = SeekJob();
       }
-      void RejectIfExists(const char* aCallSite) {
+      void RejectIfExists(StaticString aCallSite) {
         mSeekJob.RejectIfExists(aCallSite);
       }
       bool IsSeeking() const { return mSeekRequest.Exists(); }
diff --git a/dom/media/GraphDriver.cpp b/dom/media/GraphDriver.cpp
index 744de30bb5..b37aaa010a 100644
--- a/dom/media/GraphDriver.cpp
+++ b/dom/media/GraphDriver.cpp
@@ -342,6 +342,13 @@ class AudioCallbackDriver::FallbackWrapper : public GraphInterface {
                        uint32_t aAlreadyBuffered) override {
     MOZ_CRASH("Unexpected NotifyInputData from fallback SystemClockDriver");
   }
+  void NotifySetRequestedInputProcessingParamsResult(
+      AudioCallbackDriver* aDriver,
+      cubeb_input_processing_params aRequestedParams,
+      Result<cubeb_input_processing_params, int>&& aResult) override {
+    MOZ_CRASH(
+        "Unexpected processing params result from fallback SystemClockDriver");
+  }
   void DeviceChanged() override {
     MOZ_CRASH("Unexpected DeviceChanged from fallback SystemClockDriver");
   }
@@ -448,20 +455,17 @@ NS_IMPL_ISUPPORTS0(AudioCallbackDriver::FallbackWrapper)
 
 /* static */
 already_AddRefed<TaskQueue> AudioCallbackDriver::CreateTaskQueue() {
-  RefPtr<SharedThreadPool> pool = CUBEB_TASK_THREAD;
-  const uint32_t kIdleThreadTimeoutMs = 2000;
-  pool->SetIdleThreadTimeout(PR_MillisecondsToInterval(kIdleThreadTimeoutMs));
-
-  RefPtr<TaskQueue> queue =
-      TaskQueue::Create(pool.forget(), "AudioCallbackDriver cubeb task queue");
-  return queue.forget();
+  return TaskQueue::Create(CubebUtils::GetCubebOperationThread(),
+                           "AudioCallbackDriver cubeb task queue")
+      .forget();
 }
 
 AudioCallbackDriver::AudioCallbackDriver(
     GraphInterface* aGraphInterface, GraphDriver* aPreviousDriver,
     uint32_t aSampleRate, uint32_t aOutputChannelCount,
     uint32_t aInputChannelCount, CubebUtils::AudioDeviceID aOutputDeviceID,
-    CubebUtils::AudioDeviceID aInputDeviceID, AudioInputType aAudioInputType)
+    CubebUtils::AudioDeviceID aInputDeviceID, AudioInputType aAudioInputType,
+    cubeb_input_processing_params aRequestedInputProcessingParams)
     : GraphDriver(aGraphInterface, aPreviousDriver, aSampleRate),
       mOutputChannelCount(aOutputChannelCount),
       mInputChannelCount(aInputChannelCount),
@@ -469,6 +473,7 @@ AudioCallbackDriver::AudioCallbackDriver(
       mInputDeviceID(aInputDeviceID),
       mIterationDurationMS(MEDIA_GRAPH_TARGET_PERIOD_MS),
       mCubebOperationThread(CreateTaskQueue()),
+      mRequestedInputProcessingParams(aRequestedInputProcessingParams),
       mAudioThreadId(ProfilerThreadId{}),
       mAudioThreadIdInCb(std::thread::id()),
       mFallback("AudioCallbackDriver::mFallback"),
@@ -485,7 +490,12 @@ AudioCallbackDriver::AudioCallbackDriver(
   if (aAudioInputType == AudioInputType::Voice &&
       StaticPrefs::
           media_getusermedia_microphone_prefer_voice_stream_with_processing_enabled()) {
-    LOG(LogLevel::Debug, ("VOICE."));
+    LOG(LogLevel::Debug,
+        ("%p: AudioCallbackDriver %p ctor - using VOICE and requesting input "
+         "processing params %s.",
+         Graph(), this,
+         CubebUtils::ProcessingParamsToString(aRequestedInputProcessingParams)
+             .get()));
     mInputDevicePreference = CUBEB_DEVICE_PREF_VOICE;
     CubebUtils::SetInCommunication(true);
   } else {
@@ -670,6 +680,10 @@ void AudioCallbackDriver::Init(const nsCString& aStreamName) {
   PanOutputIfNeeded(inputWanted);
 #endif
 
+  if (inputWanted && InputDevicePreference() == AudioInputType::Voice) {
+    SetInputProcessingParams(mRequestedInputProcessingParams);
+  }
+
   cubeb_stream_register_device_changed_callback(
       mAudioStream, AudioCallbackDriver::DeviceChangedCallback_s);
 
@@ -1256,6 +1270,11 @@ TimeDuration AudioCallbackDriver::AudioOutputLatency() {
                                    mSampleRate);
 }
 
+bool AudioCallbackDriver::HasFallback() const {
+  MOZ_ASSERT(InIteration());
+  return mFallbackDriverState != FallbackDriverState::None;
+}
+
 bool AudioCallbackDriver::OnFallback() const {
   MOZ_ASSERT(InIteration());
   return mFallbackDriverState == FallbackDriverState::Running;
@@ -1309,6 +1328,9 @@ void AudioCallbackDriver::FallbackToSystemClockDriver() {
 void AudioCallbackDriver::FallbackDriverStopped(GraphTime aIterationEnd,
                                                 GraphTime aStateComputedTime,
                                                 FallbackDriverState aState) {
+  LOG(LogLevel::Debug,
+      ("%p: AudioCallbackDriver %p Fallback driver has stopped.", Graph(),
+       this));
   mIterationEnd = aIterationEnd;
   mStateComputedTime = aStateComputedTime;
   mNextReInitAttempt = TimeStamp();
@@ -1367,6 +1389,107 @@ void AudioCallbackDriver::MaybeStartAudioStream() {
   Start();
 }
 
+cubeb_input_processing_params
+AudioCallbackDriver::RequestedInputProcessingParams() const {
+  MOZ_ASSERT(InIteration());
+  return mRequestedInputProcessingParams;
+}
+
+void AudioCallbackDriver::SetRequestedInputProcessingParams(
+    cubeb_input_processing_params aParams) {
+  MOZ_ASSERT(InIteration());
+  if (mRequestedInputProcessingParams == aParams) {
+    return;
+  }
+  LOG(LogLevel::Info,
+      ("AudioCallbackDriver %p, Input processing params %s requested.", this,
+       CubebUtils::ProcessingParamsToString(aParams).get()));
+  mRequestedInputProcessingParams = aParams;
+  MOZ_ALWAYS_SUCCEEDS(mCubebOperationThread->Dispatch(
+      NS_NewRunnableFunction(__func__, [this, self = RefPtr(this), aParams] {
+        SetInputProcessingParams(aParams);
+      })));
+}
+
+void AudioCallbackDriver::SetInputProcessingParams(
+    cubeb_input_processing_params aParams) {
+  MOZ_ASSERT(OnCubebOperationThread());
+  auto requested = aParams;
+  auto result = ([&]() -> Maybe<Result<cubeb_input_processing_params, int>> {
+    // This function decides how to handle the request.
+    // Returning Nothing() does nothing, because either
+    //   1) there is no update since the previous state, or
+    //   2) handling is deferred to a later time.
+    // Returning Some() result will forward that result to
+    // AudioDataListener::OnInputProcessingParamsResult on the callback
+    // thread.
+    if (!mAudioStream) {
+      // No Init yet.
+      LOG(LogLevel::Debug, ("AudioCallbackDriver %p, has no cubeb stream to "
+                            "set processing params on!",
+                            this));
+      return Nothing();
+    }
+    if (mAudioStreamState == AudioStreamState::None) {
+      // Driver (and cubeb stream) was stopped.
+      return Nothing();
+    }
+    cubeb_input_processing_params supported;
+    auto handle = CubebUtils::GetCubeb();
+    int r = cubeb_get_supported_input_processing_params(handle->Context(),
+                                                        &supported);
+    if (r != CUBEB_OK) {
+      LOG(LogLevel::Debug,
+          ("AudioCallbackDriver %p, no supported processing params", this));
+      return Some(Err(CUBEB_ERROR_NOT_SUPPORTED));
+    }
+    aParams &= supported;
+    LOG(LogLevel::Debug,
+        ("AudioCallbackDriver %p, requested processing params %s reduced to %s "
+         "by supported params %s",
+         this, CubebUtils::ProcessingParamsToString(requested).get(),
+         CubebUtils::ProcessingParamsToString(aParams).get(),
+         CubebUtils::ProcessingParamsToString(supported).get()));
+    if (aParams == mConfiguredInputProcessingParams) {
+      LOG(LogLevel::Debug,
+          ("AudioCallbackDriver %p, no change in processing params %s. Not "
+           "attempting reconfiguration.",
+           this, CubebUtils::ProcessingParamsToString(aParams).get()));
+      return Some(aParams);
+    }
+    mConfiguredInputProcessingParams = aParams;
+    r = cubeb_stream_set_input_processing_params(mAudioStream, aParams);
+    if (r == CUBEB_OK) {
+      LOG(LogLevel::Info,
+          ("AudioCallbackDriver %p, input processing params set to %s", this,
+           CubebUtils::ProcessingParamsToString(aParams).get()));
+      return Some(aParams);
+    }
+    LOG(LogLevel::Info,
+        ("AudioCallbackDriver %p, failed setting input processing params to "
+         "%s. r=%d",
+         this, CubebUtils::ProcessingParamsToString(aParams).get(), r));
+    return Some(Err(r));
+  })();
+  if (!result) {
+    return;
+  }
+  MOZ_ALWAYS_SUCCEEDS(NS_DispatchToMainThread(
+      NS_NewRunnableFunction(__func__, [this, self = RefPtr(this), requested,
+                                        result = result.extract()]() mutable {
+        LOG(LogLevel::Debug,
+            ("AudioCallbackDriver %p, Notifying of input processing params %s. "
+             "r=%d",
+             this,
+             CubebUtils::ProcessingParamsToString(
+                 result.unwrapOr(CUBEB_INPUT_PROCESSING_PARAM_NONE))
+                 .get(),
+             result.isErr() ? result.inspectErr() : CUBEB_OK));
+        mGraphInterface->NotifySetRequestedInputProcessingParamsResult(
+            this, requested, std::move(result));
+      })));
+}
+
 }  // namespace mozilla
 
 // avoid redefined macro in unified build
diff --git a/dom/media/GraphDriver.h b/dom/media/GraphDriver.h
index 9ada03e7e6..4608913c7f 100644
--- a/dom/media/GraphDriver.h
+++ b/dom/media/GraphDriver.h
@@ -30,12 +30,6 @@ class nsAutoRefTraits<cubeb_stream> : public nsPointerRefTraits<cubeb_stream> {
 };
 
 namespace mozilla {
-
-// A thread pool containing only one thread to execute the cubeb operations. We
-// should always use this thread to init, destroy, start, or stop cubeb streams,
-// to avoid data racing or deadlock issues across platforms.
-#define CUBEB_TASK_THREAD SharedThreadPool::Get("CubebOperation"_ns, 1)
-
 /**
  * Assume we can run an iteration of the MediaTrackGraph loop in this much time
  * or less.
@@ -185,6 +179,12 @@ struct GraphInterface : public nsISupports {
   virtual void NotifyInputData(const AudioDataValue* aBuffer, size_t aFrames,
                                TrackRate aRate, uint32_t aChannels,
                                uint32_t aAlreadyBuffered) = 0;
+  /* Called on the main thread after an AudioCallbackDriver has attempted an
+   * operation to set aRequestedParams on the cubeb stream. */
+  virtual void NotifySetRequestedInputProcessingParamsResult(
+      AudioCallbackDriver* aDriver,
+      cubeb_input_processing_params aRequestedParams,
+      Result<cubeb_input_processing_params, int>&& aResult) = 0;
   /* Called every time there are changes to input/output audio devices like
    * plug/unplug etc. This can be called on any thread, and posts a message to
    * the main thread so that it can post a message to the graph thread. */
@@ -553,12 +553,12 @@ class AudioCallbackDriver : public GraphDriver, public MixerCallbackReceiver {
       AudioCallbackDriver, mCubebOperationThread, override);
 
   /** If aInputChannelCount is zero, then this driver is output-only. */
-  AudioCallbackDriver(GraphInterface* aGraphInterface,
-                      GraphDriver* aPreviousDriver, uint32_t aSampleRate,
-                      uint32_t aOutputChannelCount, uint32_t aInputChannelCount,
-                      CubebUtils::AudioDeviceID aOutputDeviceID,
-                      CubebUtils::AudioDeviceID aInputDeviceID,
-                      AudioInputType aAudioInputType);
+  AudioCallbackDriver(
+      GraphInterface* aGraphInterface, GraphDriver* aPreviousDriver,
+      uint32_t aSampleRate, uint32_t aOutputChannelCount,
+      uint32_t aInputChannelCount, CubebUtils::AudioDeviceID aOutputDeviceID,
+      CubebUtils::AudioDeviceID aInputDeviceID, AudioInputType aAudioInputType,
+      cubeb_input_processing_params aRequestedInputProcessingParams);
 
   void Start() override;
   MOZ_CAN_RUN_SCRIPT void Shutdown() override;
@@ -610,11 +610,16 @@ class AudioCallbackDriver : public GraphDriver, public MixerCallbackReceiver {
     return AudioInputType::Unknown;
   }
 
+  /* Get the input processing params requested from this driver, so that an
+   * external caller can decide whether it is necessary to call the setter,
+   * since it may allocate or dispatch. */
+  cubeb_input_processing_params RequestedInputProcessingParams() const;
+
+  /* Set the input processing params requested from this driver. */
+  void SetRequestedInputProcessingParams(cubeb_input_processing_params aParams);
+
   std::thread::id ThreadId() const { return mAudioThreadIdInCb.load(); }
 
-  /* Called when the thread servicing the callback has changed. This can be
-   * fairly expensive */
-  void OnThreadIdChanged();
   /* Called at the beginning of the audio callback to check if the thread id has
    * changed. */
   bool CheckThreadIdChanged();
@@ -637,6 +642,9 @@ class AudioCallbackDriver : public GraphDriver, public MixerCallbackReceiver {
   // Returns the output latency for the current audio output stream.
   TimeDuration AudioOutputLatency();
 
+  /* Returns true if this driver has a fallback driver and handover to the audio
+   * callback has not been completed. */
+  bool HasFallback() const;
   /* Returns true if this driver is currently driven by the fallback driver. */
   bool OnFallback() const;
 
@@ -655,6 +663,9 @@ class AudioCallbackDriver : public GraphDriver, public MixerCallbackReceiver {
   void Init(const nsCString& aStreamName);
   void SetCubebStreamName(const nsCString& aStreamName);
   void Stop();
+  /* After the requested input processing params has changed, this applies them
+   * on the cubeb stream. */
+  void SetInputProcessingParams(cubeb_input_processing_params aParams);
   /* Calls FallbackToSystemClockDriver() if in FallbackDriverState::None.
    * Returns Ok(true) if the fallback driver was started, or the old
    * FallbackDriverState in an Err otherwise. */
@@ -724,6 +735,13 @@ class AudioCallbackDriver : public GraphDriver, public MixerCallbackReceiver {
    * must run serially for access to mAudioStream. */
   const RefPtr<TaskQueue> mCubebOperationThread;
   cubeb_device_pref mInputDevicePreference;
+  /* Params that have been attempted to set on mAudioStream, after filtering by
+   * supported processing params. Cubeb operation thread only. */
+  cubeb_input_processing_params mConfiguredInputProcessingParams =
+      CUBEB_INPUT_PROCESSING_PARAM_NONE;
+  /* The input processing params requested from this audio driver. Once started,
+   * audio callback thread only. */
+  cubeb_input_processing_params mRequestedInputProcessingParams;
   /* Contains the id of the audio thread, from profiler_current_thread_id. */
   std::atomic<ProfilerThreadId> mAudioThreadId;
   /* This allows implementing AutoInCallback. This is equal to the current
diff --git a/dom/media/ImageToI420.cpp b/dom/media/ImageConversion.cpp
index 0f7976cb63..ea8d258279 100644
--- a/dom/media/ImageToI420.cpp
+++ b/dom/media/ImageConversion.cpp
@@ -3,10 +3,11 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#include "ImageToI420.h"
+#include "ImageConversion.h"
 
 #include "ImageContainer.h"
 #include "libyuv/convert.h"
+#include "libyuv/convert_from_argb.h"
 #include "mozilla/dom/ImageBitmapBinding.h"
 #include "mozilla/dom/ImageUtils.h"
 #include "mozilla/gfx/Point.h"
@@ -151,4 +152,56 @@ nsresult ConvertToI420(Image* aImage, uint8_t* aDestY, int aDestStrideY,
   }
 }
 
+nsresult ConvertToNV12(layers::Image* aImage, uint8_t* aDestY, int aDestStrideY,
+                       uint8_t* aDestUV, int aDestStrideUV) {
+  if (!aImage->IsValid()) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (const PlanarYCbCrData* data = GetPlanarYCbCrData(aImage)) {
+    const ImageUtils imageUtils(aImage);
+    Maybe<dom::ImageBitmapFormat> format = imageUtils.GetFormat();
+    if (format.isNothing()) {
+      MOZ_ASSERT_UNREACHABLE("YUV format conversion not implemented");
+      return NS_ERROR_NOT_IMPLEMENTED;
+    }
+
+    if (format.value() != ImageBitmapFormat::YUV420P) {
+      NS_WARNING("ConvertToNV12: Convert YUV data in I420 only");
+      return NS_ERROR_NOT_IMPLEMENTED;
+    }
+
+    return MapRv(libyuv::I420ToNV12(
+        data->mYChannel, data->mYStride, data->mCbChannel, data->mCbCrStride,
+        data->mCrChannel, data->mCbCrStride, aDestY, aDestStrideY, aDestUV,
+        aDestStrideUV, aImage->GetSize().width, aImage->GetSize().height));
+  }
+
+  RefPtr<SourceSurface> surf = GetSourceSurface(aImage);
+  if (!surf) {
+    return NS_ERROR_FAILURE;
+  }
+
+  RefPtr<DataSourceSurface> data = surf->GetDataSurface();
+  if (!data) {
+    return NS_ERROR_FAILURE;
+  }
+
+  DataSourceSurface::ScopedMap map(data, DataSourceSurface::READ);
+  if (!map.IsMapped()) {
+    return NS_ERROR_FAILURE;
+  }
+
+  if (surf->GetFormat() != SurfaceFormat::B8G8R8A8 &&
+      surf->GetFormat() != SurfaceFormat::B8G8R8X8) {
+    NS_WARNING("ConvertToNV12: Convert SurfaceFormat in BGR* only");
+    return NS_ERROR_NOT_IMPLEMENTED;
+  }
+
+  return MapRv(
+      libyuv::ARGBToNV12(static_cast<uint8_t*>(map.GetData()), map.GetStride(),
+                         aDestY, aDestStrideY, aDestUV, aDestStrideUV,
+                         aImage->GetSize().width, aImage->GetSize().height));
+}
+
 }  // namespace mozilla
diff --git a/dom/media/ImageToI420.h b/dom/media/ImageConversion.h
index 24a66ebc9f..8f1396f9e9 100644
--- a/dom/media/ImageToI420.h
+++ b/dom/media/ImageConversion.h
@@ -21,6 +21,12 @@ nsresult ConvertToI420(layers::Image* aImage, uint8_t* aDestY, int aDestStrideY,
                        uint8_t* aDestU, int aDestStrideU, uint8_t* aDestV,
                        int aDestStrideV);
 
+/**
+ * Converts aImage to an NV12 image and writes it to the given buffers.
+ */
+nsresult ConvertToNV12(layers::Image* aImage, uint8_t* aDestY, int aDestStrideY,
+                       uint8_t* aDestUV, int aDestStrideUV);
+
 }  // namespace mozilla
 
 #endif /* ImageToI420Converter_h */
diff --git a/dom/media/MediaFormatReader.cpp b/dom/media/MediaFormatReader.cpp
index 7eb8e4e5e2..0d7daaa3d8 100644
--- a/dom/media/MediaFormatReader.cpp
+++ b/dom/media/MediaFormatReader.cpp
@@ -1770,6 +1770,13 @@ void MediaFormatReader::NotifyNewOutput(
       if (aTrack == TrackInfo::kAudioTrack) {
         decoder.mNumOfConsecutiveUtilityCrashes = 0;
       }
+      decoder.mDecodePerfRecorder->Record(
+          sample->mTime.ToMicroseconds(),
+          [startTime = sample->mTime.ToMicroseconds(),
+           endTime =
+               sample->GetEndTime().ToMicroseconds()](PlaybackStage& aStage) {
+            aStage.SetStartTimeAndEndTime(startTime, endTime);
+          });
     }
   }
   LOG("Done processing new %s samples", TrackTypeToStr(aTrack));
@@ -1962,6 +1969,38 @@ void MediaFormatReader::RequestDemuxSamples(TrackType aTrack) {
   }
 }
 
+void MediaFormatReader::DecoderData::StartRecordDecodingPerf(
+    const TrackType aTrack, const MediaRawData* aSample) {
+  if (!mDecodePerfRecorder) {
+    mDecodePerfRecorder.reset(new PerformanceRecorderMulti<PlaybackStage>());
+  }
+  const int32_t height = aTrack == TrackInfo::kVideoTrack
+                             ? GetCurrentInfo()->GetAsVideoInfo()->mImage.height
+                             : 0;
+  MediaInfoFlag flag = MediaInfoFlag::None;
+  flag |=
+      aSample->mKeyframe ? MediaInfoFlag::KeyFrame : MediaInfoFlag::NonKeyFrame;
+  if (aTrack == TrackInfo::kVideoTrack) {
+    flag |= mIsHardwareAccelerated ? MediaInfoFlag::HardwareDecoding
+                                   : MediaInfoFlag::SoftwareDecoding;
+    const nsCString& mimeType = GetCurrentInfo()->mMimeType;
+    if (MP4Decoder::IsH264(mimeType)) {
+      flag |= MediaInfoFlag::VIDEO_H264;
+    } else if (VPXDecoder::IsVPX(mimeType, VPXDecoder::VP8)) {
+      flag |= MediaInfoFlag::VIDEO_VP8;
+    } else if (VPXDecoder::IsVPX(mimeType, VPXDecoder::VP9)) {
+      flag |= MediaInfoFlag::VIDEO_VP9;
+    }
+#ifdef MOZ_AV1
+    else if (AOMDecoder::IsAV1(mimeType)) {
+      flag |= MediaInfoFlag::VIDEO_AV1;
+    }
+#endif
+  }
+  mDecodePerfRecorder->Start(aSample->mTime.ToMicroseconds(),
+                             MediaStage::RequestDecode, height, flag);
+}
+
 void MediaFormatReader::DecodeDemuxedSamples(TrackType aTrack,
                                              MediaRawData* aSample) {
   MOZ_ASSERT(OnTaskQueue());
@@ -1980,41 +2019,15 @@ void MediaFormatReader::DecodeDemuxedSamples(TrackType aTrack,
           aSample->mDuration.ToMicroseconds(), aSample->mKeyframe ? " kf" : "",
           aSample->mEOS ? " eos" : "");
 
-  const int32_t height =
-      aTrack == TrackInfo::kVideoTrack
-          ? decoder.GetCurrentInfo()->GetAsVideoInfo()->mImage.height
-          : 0;
-  MediaInfoFlag flag = MediaInfoFlag::None;
-  flag |=
-      aSample->mKeyframe ? MediaInfoFlag::KeyFrame : MediaInfoFlag::NonKeyFrame;
-  if (aTrack == TrackInfo::kVideoTrack) {
-    flag |= VideoIsHardwareAccelerated() ? MediaInfoFlag::HardwareDecoding
-                                         : MediaInfoFlag::SoftwareDecoding;
-    const nsCString& mimeType = decoder.GetCurrentInfo()->mMimeType;
-    if (MP4Decoder::IsH264(mimeType)) {
-      flag |= MediaInfoFlag::VIDEO_H264;
-    } else if (VPXDecoder::IsVPX(mimeType, VPXDecoder::VP8)) {
-      flag |= MediaInfoFlag::VIDEO_VP8;
-    } else if (VPXDecoder::IsVPX(mimeType, VPXDecoder::VP9)) {
-      flag |= MediaInfoFlag::VIDEO_VP9;
-    }
-#ifdef MOZ_AV1
-    else if (AOMDecoder::IsAV1(mimeType)) {
-      flag |= MediaInfoFlag::VIDEO_AV1;
-    }
-#endif
-  }
-  PerformanceRecorder<PlaybackStage> perfRecorder(MediaStage::RequestDecode,
-                                                  height, flag);
+  decoder.StartRecordDecodingPerf(aTrack, aSample);
   if (mMediaEngineId && aSample->mCrypto.IsEncrypted()) {
     aSample->mShouldCopyCryptoToRemoteRawData = true;
   }
   decoder.mDecoder->Decode(aSample)
       ->Then(
           mTaskQueue, __func__,
-          [self, aTrack, &decoder, perfRecorder(std::move(perfRecorder))](
-              MediaDataDecoder::DecodedData&& aResults) mutable {
-            perfRecorder.Record();
+          [self, aTrack,
+           &decoder](MediaDataDecoder::DecodedData&& aResults) mutable {
             decoder.mDecodeRequest.Complete();
             self->NotifyNewOutput(aTrack, std::move(aResults));
           },
diff --git a/dom/media/MediaFormatReader.h b/dom/media/MediaFormatReader.h
index 5c4e04172d..b29d25db83 100644
--- a/dom/media/MediaFormatReader.h
+++ b/dom/media/MediaFormatReader.h
@@ -430,6 +430,7 @@ class MediaFormatReader final
     Maybe<TimeStamp> mWaitingForDataStartTime;
     bool mWaitingForKey;
     bool mReceivedNewData;
+    UniquePtr<PerformanceRecorderMulti<PlaybackStage>> mDecodePerfRecorder;
 
     // Pending seek.
     MozPromiseRequestHolder<MediaTrackDemuxer::SeekPromise> mSeekRequest;
@@ -474,6 +475,9 @@ class MediaFormatReader final
       mDrainState = DrainState::DrainRequested;
     }
 
+    void StartRecordDecodingPerf(const TrackType aTrack,
+                                 const MediaRawData* aSample);
+
     // Track decoding error and fail when we hit the limit.
     uint32_t mNumOfConsecutiveDecodingError;
     uint32_t mMaxConsecutiveDecodingError;
@@ -552,7 +556,7 @@ class MediaFormatReader final
     // Rejecting the promise will stop the reader from decoding ahead.
     virtual bool HasPromise() const = 0;
     virtual void RejectPromise(const MediaResult& aError,
-                               const char* aMethodName) = 0;
+                               StaticString aMethodName) = 0;
 
     // Clear track demuxer related data.
     void ResetDemuxer() {
@@ -688,20 +692,20 @@ class MediaFormatReader final
 
     bool HasPromise() const override { return mHasPromise; }
 
-    RefPtr<DataPromise<Type>> EnsurePromise(const char* aMethodName) {
+    RefPtr<DataPromise<Type>> EnsurePromise(StaticString aMethodName) {
       MOZ_ASSERT(mOwner->OnTaskQueue());
       mHasPromise = true;
       return mPromise.Ensure(aMethodName);
     }
 
-    void ResolvePromise(Type* aData, const char* aMethodName) {
+    void ResolvePromise(Type* aData, StaticString aMethodName) {
       MOZ_ASSERT(mOwner->OnTaskQueue());
       mPromise.Resolve(aData, aMethodName);
       mHasPromise = false;
     }
 
     void RejectPromise(const MediaResult& aError,
-                       const char* aMethodName) override {
+                       StaticString aMethodName) override {
       MOZ_ASSERT(mOwner->OnTaskQueue());
       mPromise.Reject(aError, aMethodName);
       mHasPromise = false;
diff --git a/dom/media/MediaInfo.h b/dom/media/MediaInfo.h
index 7ab5df4e0a..00f322bac7 100644
--- a/dom/media/MediaInfo.h
+++ b/dom/media/MediaInfo.h
@@ -349,7 +349,32 @@ class VideoInfo : public TrackInfo {
         mExtraData(new MediaByteBuffer),
         mRotation(VideoRotation::kDegree_0) {}
 
-  VideoInfo(const VideoInfo& aOther) = default;
+  VideoInfo(const VideoInfo& aOther) : TrackInfo(aOther) {
+    if (aOther.mCodecSpecificConfig) {
+      mCodecSpecificConfig = new MediaByteBuffer();
+      mCodecSpecificConfig->AppendElements(
+          reinterpret_cast<uint8_t*>(aOther.mCodecSpecificConfig->Elements()),
+          aOther.mCodecSpecificConfig->Length());
+    }
+    if (aOther.mExtraData) {
+      mExtraData = new MediaByteBuffer();
+      mExtraData->AppendElements(
+          reinterpret_cast<uint8_t*>(aOther.mExtraData->Elements()),
+          aOther.mExtraData->Length());
+    }
+    mDisplay = aOther.mDisplay;
+    mStereoMode = aOther.mStereoMode;
+    mImage = aOther.mImage;
+    mRotation = aOther.mRotation;
+    mColorDepth = aOther.mColorDepth;
+    mColorSpace = aOther.mColorSpace;
+    mColorPrimaries = aOther.mColorPrimaries;
+    mTransferFunction = aOther.mTransferFunction;
+    mColorRange = aOther.mColorRange;
+    mImageRect = aOther.mImageRect;
+    mAlphaPresent = aOther.mAlphaPresent;
+    mFrameRate = aOther.mFrameRate;
+  };
 
   bool operator==(const VideoInfo& rhs) const;
 
diff --git a/dom/media/MediaManager.cpp b/dom/media/MediaManager.cpp
index fb4384c826..0eb1a0977d 100644
--- a/dom/media/MediaManager.cpp
+++ b/dom/media/MediaManager.cpp
@@ -10,13 +10,16 @@
 #include "AudioDeviceInfo.h"
 #include "AudioStreamTrack.h"
 #include "CubebDeviceEnumerator.h"
+#include "CubebInputStream.h"
 #include "MediaTimer.h"
 #include "MediaTrackConstraints.h"
 #include "MediaTrackGraph.h"
 #include "MediaTrackListener.h"
 #include "VideoStreamTrack.h"
+#include "Tracing.h"
 #include "VideoUtils.h"
 #include "mozilla/Base64.h"
+#include "mozilla/EventTargetCapability.h"
 #include "mozilla/MozPromise.h"
 #include "mozilla/NullPrincipal.h"
 #include "mozilla/PeerIdentity.h"
@@ -291,6 +294,72 @@ void MediaManager::CallOnSuccess(GetUserMediaSuccessCallback& aCallback,
   aCallback.Call(aStream);
 }
 
+enum class PersistentPermissionState : uint32_t {
+  Unknown = nsIPermissionManager::UNKNOWN_ACTION,
+  Allow = nsIPermissionManager::ALLOW_ACTION,
+  Deny = nsIPermissionManager::DENY_ACTION,
+  Prompt = nsIPermissionManager::PROMPT_ACTION,
+};
+
+static PersistentPermissionState CheckPermission(
+    PersistentPermissionState aPermission) {
+  switch (aPermission) {
+    case PersistentPermissionState::Unknown:
+    case PersistentPermissionState::Allow:
+    case PersistentPermissionState::Deny:
+    case PersistentPermissionState::Prompt:
+      return aPermission;
+  }
+  MOZ_CRASH("Unexpected permission value");
+}
+
+struct WindowPersistentPermissionState {
+  PersistentPermissionState mCameraPermission;
+  PersistentPermissionState mMicrophonePermission;
+};
+
+static Result<WindowPersistentPermissionState, nsresult>
+GetPersistentPermissions(uint64_t aWindowId) {
+  auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowId);
+  if (NS_WARN_IF(!window) || NS_WARN_IF(!window->GetPrincipal())) {
+    return Err(NS_ERROR_INVALID_ARG);
+  }
+
+  Document* doc = window->GetExtantDoc();
+  if (NS_WARN_IF(!doc)) {
+    return Err(NS_ERROR_INVALID_ARG);
+  }
+
+  nsIPrincipal* principal = window->GetPrincipal();
+  if (NS_WARN_IF(!principal)) {
+    return Err(NS_ERROR_INVALID_ARG);
+  }
+
+  nsresult rv;
+  RefPtr<PermissionDelegateHandler> permDelegate =
+      doc->GetPermissionDelegateHandler();
+  if (NS_WARN_IF(!permDelegate)) {
+    return Err(NS_ERROR_INVALID_ARG);
+  }
+
+  uint32_t audio = nsIPermissionManager::UNKNOWN_ACTION;
+  uint32_t video = nsIPermissionManager::UNKNOWN_ACTION;
+  {
+    rv = permDelegate->GetPermission("microphone"_ns, &audio, true);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return Err(rv);
+    }
+    rv = permDelegate->GetPermission("camera"_ns, &video, true);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return Err(rv);
+    }
+  }
+
+  return WindowPersistentPermissionState{
+      CheckPermission(static_cast<PersistentPermissionState>(video)),
+      CheckPermission(static_cast<PersistentPermissionState>(audio))};
+}
+
 /**
  * DeviceListener has threadsafe refcounting for use across the main, media and
  * MTG threads. But it has a non-threadsafe SupportsWeakPtr for WeakPtr usage
@@ -1458,9 +1527,63 @@ class GetUserMediaStreamTask final : public GetUserMediaTask {
 
   const MediaStreamConstraints& GetConstraints() { return mConstraints; }
 
+  void PrimeVoiceProcessing() {
+    mPrimingStream = MakeAndAddRef<PrimingCubebVoiceInputStream>();
+    mPrimingStream->Init();
+  }
+
  private:
   void PrepareDOMStream();
 
+  class PrimingCubebVoiceInputStream {
+    class Listener final : public CubebInputStream::Listener {
+      NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Listener, override);
+
+     private:
+      ~Listener() = default;
+
+      long DataCallback(const void*, long) override {
+        MOZ_CRASH("Unexpected data callback");
+      }
+      void StateCallback(cubeb_state) override {}
+      void DeviceChangedCallback() override {}
+    };
+
+    NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DELETE_ON_EVENT_TARGET(
+        PrimingCubebVoiceInputStream, mCubebThread.GetEventTarget())
+
+   public:
+    void Init() {
+      mCubebThread.GetEventTarget()->Dispatch(
+          NS_NewRunnableFunction(__func__, [this, self = RefPtr(this)] {
+            mCubebThread.AssertOnCurrentThread();
+            LOG("Priming voice processing with stream %p", this);
+            TRACE("PrimingCubebVoiceInputStream::Init");
+            const cubeb_devid default_device = nullptr;
+            const uint32_t mono = 1;
+            const uint32_t rate = CubebUtils::PreferredSampleRate(false);
+            const bool isVoice = true;
+            mCubebStream =
+                CubebInputStream::Create(default_device, mono, rate, isVoice,
+                                         MakeRefPtr<Listener>().get());
+          }));
+    }
+
+   private:
+    ~PrimingCubebVoiceInputStream() {
+      mCubebThread.AssertOnCurrentThread();
+      LOG("Releasing primed voice processing stream %p", this);
+      mCubebStream = nullptr;
+    }
+
+    const EventTargetCapability<nsISerialEventTarget> mCubebThread =
+        EventTargetCapability<nsISerialEventTarget>(
+            TaskQueue::Create(CubebUtils::GetCubebOperationThread(),
+                              "PrimingCubebInputStream::mCubebThread")
+                .get());
+    UniquePtr<CubebInputStream> mCubebStream MOZ_GUARDED_BY(mCubebThread);
+  };
+
   // Constraints derived from those passed to getUserMedia() but adjusted for
   // preferences, defaults, and security
   const MediaStreamConstraints mConstraints;
@@ -1473,6 +1596,7 @@ class GetUserMediaStreamTask final : public GetUserMediaTask {
   // MediaDevices are set when selected and Allowed() by the UI.
   RefPtr<LocalMediaDevice> mAudioDevice;
   RefPtr<LocalMediaDevice> mVideoDevice;
+  RefPtr<PrimingCubebVoiceInputStream> mPrimingStream;
   // Tracking id unique for a video frame source. Set when the corresponding
   // device has been allocated.
   Maybe<TrackingId> mVideoTrackingId;
@@ -2220,6 +2344,7 @@ MediaManager::MediaManager(already_AddRefed<TaskQueue> aMediaThread)
   mPrefs.mWidth = 0;    // adaptive default
   mPrefs.mHeight = 0;   // adaptive default
   mPrefs.mFPS = MediaEnginePrefs::DEFAULT_VIDEO_FPS;
+  mPrefs.mUsePlatformProcessing = false;
   mPrefs.mAecOn = false;
   mPrefs.mUseAecMobile = false;
   mPrefs.mAgcOn = false;
@@ -2272,14 +2397,14 @@ static void ForeachObservedPref(const Function& aFunction) {
   aFunction("media.video_loopback_dev"_ns);
   aFunction("media.getusermedia.fake-camera-name"_ns);
 #ifdef MOZ_WEBRTC
-  aFunction("media.getusermedia.aec_enabled"_ns);
-  aFunction("media.getusermedia.aec"_ns);
-  aFunction("media.getusermedia.agc_enabled"_ns);
-  aFunction("media.getusermedia.agc"_ns);
-  aFunction("media.getusermedia.hpf_enabled"_ns);
-  aFunction("media.getusermedia.noise_enabled"_ns);
-  aFunction("media.getusermedia.noise"_ns);
-  aFunction("media.getusermedia.channels"_ns);
+  aFunction("media.getusermedia.audio.processing.aec.enabled"_ns);
+  aFunction("media.getusermedia.audio.processing.aec"_ns);
+  aFunction("media.getusermedia.audio.processing.agc.enabled"_ns);
+  aFunction("media.getusermedia.audio.processing.agc"_ns);
+  aFunction("media.getusermedia.audio.processing.hpf.enabled"_ns);
+  aFunction("media.getusermedia.audio.processing.noise.enabled"_ns);
+  aFunction("media.getusermedia.audio.processing.noise"_ns);
+  aFunction("media.getusermedia.audio.max_channels"_ns);
   aFunction("media.navigator.streams.fake"_ns);
 #endif
 }
@@ -2392,7 +2517,7 @@ void MediaManager::Dispatch(already_AddRefed<Runnable> task) {
 
 template <typename MozPromiseType, typename FunctionType>
 /* static */
-RefPtr<MozPromiseType> MediaManager::Dispatch(const char* aName,
+RefPtr<MozPromiseType> MediaManager::Dispatch(StaticString aName,
                                               FunctionType&& aFunction) {
   MozPromiseHolder<MozPromiseType> holder;
   RefPtr<MozPromiseType> promise = holder.Ensure(aName);
@@ -2851,7 +2976,7 @@ RefPtr<MediaManager::StreamPromise> MediaManager::GetUserMedia(
       case MediaSourceEnum::AudioCapture:
         // Only enable AudioCapture if the pref is enabled. If it's not, we can
         // deny right away.
-        if (!Preferences::GetBool("media.getusermedia.audiocapture.enabled")) {
+        if (!Preferences::GetBool("media.getusermedia.audio.capture.enabled")) {
           return StreamPromise::CreateAndReject(
               MakeRefPtr<MediaMgrError>(MediaMgrError::Name::NotAllowedError),
               __func__);
@@ -3044,6 +3169,36 @@ RefPtr<MediaManager::StreamPromise> MediaManager::GetUserMedia(
                 std::move(audioListener), std::move(videoListener), prefs,
                 principalInfo, aCallerType, focusSource);
 
+            // It is time to ask for user permission, prime voice processing
+            // now. Use a local lambda to enable a guard pattern.
+            [&] {
+              if (!StaticPrefs::
+                      media_getusermedia_microphone_voice_stream_priming_enabled() ||
+                  !StaticPrefs::
+                      media_getusermedia_microphone_prefer_voice_stream_with_processing_enabled()) {
+                return;
+              }
+
+              if (const auto fc = FlattenedConstraints(
+                      NormalizedConstraints(GetInvariant(c.mAudio)));
+                  !fc.mEchoCancellation.Get(prefs.mAecOn) &&
+                  !fc.mAutoGainControl.Get(prefs.mAgcOn && prefs.mAecOn) &&
+                  !fc.mNoiseSuppression.Get(prefs.mNoiseOn && prefs.mAecOn)) {
+                return;
+              }
+
+              if (GetPersistentPermissions(windowID)
+                      .map([](auto&& aState) {
+                        return aState.mMicrophonePermission ==
+                               PersistentPermissionState::Deny;
+                      })
+                      .unwrapOr(true)) {
+                return;
+              }
+
+              task->PrimeVoiceProcessing();
+            }();
+
             size_t taskCount =
                 self->AddTaskAndGetCount(windowID, callID, std::move(task));
 
@@ -3474,14 +3629,19 @@ void MediaManager::GetPrefs(nsIPrefBranch* aBranch, const char* aData) {
   GetPref(aBranch, "media.navigator.audio.fake_frequency", aData,
           &mPrefs.mFreq);
 #ifdef MOZ_WEBRTC
-  GetPrefBool(aBranch, "media.getusermedia.aec_enabled", aData, &mPrefs.mAecOn);
-  GetPrefBool(aBranch, "media.getusermedia.agc_enabled", aData, &mPrefs.mAgcOn);
-  GetPrefBool(aBranch, "media.getusermedia.hpf_enabled", aData, &mPrefs.mHPFOn);
-  GetPrefBool(aBranch, "media.getusermedia.noise_enabled", aData,
-              &mPrefs.mNoiseOn);
-  GetPrefBool(aBranch, "media.getusermedia.transient_enabled", aData,
-              &mPrefs.mTransientOn);
-  GetPrefBool(aBranch, "media.getusermedia.agc2_forced", aData,
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.platform.enabled",
+              aData, &mPrefs.mUsePlatformProcessing);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.aec.enabled", aData,
+              &mPrefs.mAecOn);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.agc.enabled", aData,
+              &mPrefs.mAgcOn);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.hpf.enabled", aData,
+              &mPrefs.mHPFOn);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.noise.enabled",
+              aData, &mPrefs.mNoiseOn);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.transient.enabled",
+              aData, &mPrefs.mTransientOn);
+  GetPrefBool(aBranch, "media.getusermedia.audio.processing.agc2.forced", aData,
               &mPrefs.mAgc2Forced);
   // Use 0 or 1 to force to false or true
   // EchoCanceller3Config::echo_removal_control.has_clock_drift.
@@ -3489,14 +3649,19 @@ void MediaManager::GetPrefs(nsIPrefBranch* aBranch, const char* aData) {
   // deemed appropriate.
   GetPref(aBranch, "media.getusermedia.audio.processing.aec.expect_drift",
           aData, &mPrefs.mExpectDrift);
-  GetPref(aBranch, "media.getusermedia.agc", aData, &mPrefs.mAgc);
-  GetPref(aBranch, "media.getusermedia.noise", aData, &mPrefs.mNoise);
-  GetPref(aBranch, "media.getusermedia.channels", aData, &mPrefs.mChannels);
+  GetPref(aBranch, "media.getusermedia.audio.processing.agc", aData,
+          &mPrefs.mAgc);
+  GetPref(aBranch, "media.getusermedia.audio.processing.noise", aData,
+          &mPrefs.mNoise);
+  GetPref(aBranch, "media.getusermedia.audio.max_channels", aData,
+          &mPrefs.mChannels);
 #endif
-  LOG("%s: default prefs: %dx%d @%dfps, %dHz test tones, aec: %s, "
-      "agc: %s, hpf: %s, noise: %s, drift: %s, agc level: %d, agc version: %s, "
-      "noise level: %d, transient: %s, channels %d",
+  LOG("%s: default prefs: %dx%d @%dfps, %dHz test tones, platform processing: "
+      "%s, aec: %s, agc: %s, hpf: %s, noise: %s, drift: %s, agc level: %d, agc "
+      "version: "
+      "%s, noise level: %d, transient: %s, channels %d",
       __FUNCTION__, mPrefs.mWidth, mPrefs.mHeight, mPrefs.mFPS, mPrefs.mFreq,
+      mPrefs.mUsePlatformProcessing ? "on" : "off",
       mPrefs.mAecOn ? "on" : "off", mPrefs.mAgcOn ? "on" : "off",
       mPrefs.mHPFOn ? "on" : "off", mPrefs.mNoiseOn ? "on" : "off",
       mPrefs.mExpectDrift < 0 ? "auto"
@@ -3948,43 +4113,13 @@ bool MediaManager::IsActivelyCapturingOrHasAPermission(uint64_t aWindowId) {
 
   // Or are persistent permissions (audio or video) granted?
 
-  auto* window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowId);
-  if (NS_WARN_IF(!window) || NS_WARN_IF(!window->GetPrincipal())) {
-    return false;
-  }
-
-  Document* doc = window->GetExtantDoc();
-  if (NS_WARN_IF(!doc)) {
-    return false;
-  }
-
-  nsIPrincipal* principal = window->GetPrincipal();
-  if (NS_WARN_IF(!principal)) {
-    return false;
-  }
-
-  // Check if this site has persistent permissions.
-  nsresult rv;
-  RefPtr<PermissionDelegateHandler> permDelegate =
-      doc->GetPermissionDelegateHandler();
-  if (NS_WARN_IF(!permDelegate)) {
-    return false;
-  }
-
-  uint32_t audio = nsIPermissionManager::UNKNOWN_ACTION;
-  uint32_t video = nsIPermissionManager::UNKNOWN_ACTION;
-  {
-    rv = permDelegate->GetPermission("microphone"_ns, &audio, true);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      return false;
-    }
-    rv = permDelegate->GetPermission("camera"_ns, &video, true);
-    if (NS_WARN_IF(NS_FAILED(rv))) {
-      return false;
-    }
-  }
-  return audio == nsIPermissionManager::ALLOW_ACTION ||
-         video == nsIPermissionManager::ALLOW_ACTION;
+  return GetPersistentPermissions(aWindowId)
+      .map([](auto&& aState) {
+        return aState.mMicrophonePermission ==
+                   PersistentPermissionState::Allow ||
+               aState.mCameraPermission == PersistentPermissionState::Allow;
+      })
+      .unwrapOr(false);
 }
 
 DeviceListener::DeviceListener()
diff --git a/dom/media/MediaManager.h b/dom/media/MediaManager.h
index 738ccd795d..81f23bfe05 100644
--- a/dom/media/MediaManager.h
+++ b/dom/media/MediaManager.h
@@ -220,7 +220,7 @@ class MediaManager final : public nsIMediaManagerService,
    * manager thread.
    */
   template <typename MozPromiseType, typename FunctionType>
-  static RefPtr<MozPromiseType> Dispatch(const char* aName,
+  static RefPtr<MozPromiseType> Dispatch(StaticString aName,
                                          FunctionType&& aFunction);
 
 #ifdef DEBUG
diff --git a/dom/media/MediaResult.h b/dom/media/MediaResult.h
index 58e3bf7671..9b4031e95c 100644
--- a/dom/media/MediaResult.h
+++ b/dom/media/MediaResult.h
@@ -9,7 +9,7 @@
 
 #include "nsString.h"  // Required before 'mozilla/ErrorNames.h'!?
 #include "mozilla/ErrorNames.h"
-#include "mozilla/TimeStamp.h"
+#include "mozilla/IntegerPrintfMacros.h"
 #include "nsError.h"
 #include "nsPrintfCString.h"
 
diff --git a/dom/media/MediaTimer.cpp b/dom/media/MediaTimer.cpp
index c34eb816fa..231e0e2441 100644
--- a/dom/media/MediaTimer.cpp
+++ b/dom/media/MediaTimer.cpp
@@ -68,12 +68,12 @@ bool MediaTimer::OnMediaTimerThread() {
 }
 
 RefPtr<MediaTimerPromise> MediaTimer::WaitFor(const TimeDuration& aDuration,
-                                              const char* aCallSite) {
+                                              StaticString aCallSite) {
   return WaitUntil(TimeStamp::Now() + aDuration, aCallSite);
 }
 
 RefPtr<MediaTimerPromise> MediaTimer::WaitUntil(const TimeStamp& aTimeStamp,
-                                                const char* aCallSite) {
+                                                StaticString aCallSite) {
   MonitorAutoLock mon(mMonitor);
   TIMER_LOG("MediaTimer::WaitUntil %" PRId64, RelativeMicroseconds(aTimeStamp));
   Entry e(aTimeStamp, aCallSite);
diff --git a/dom/media/MediaTimer.h b/dom/media/MediaTimer.h
index 837a1591b3..2ab3f2e569 100644
--- a/dom/media/MediaTimer.h
+++ b/dom/media/MediaTimer.h
@@ -44,9 +44,9 @@ class MediaTimer {
                                                      DispatchDestroy());
 
   RefPtr<MediaTimerPromise> WaitFor(const TimeDuration& aDuration,
-                                    const char* aCallSite);
+                                    StaticString aCallSite);
   RefPtr<MediaTimerPromise> WaitUntil(const TimeStamp& aTimeStamp,
-                                      const char* aCallSite);
+                                      StaticString aCallSite);
   void Cancel();  // Cancel and reject any unresolved promises with false.
 
  private:
@@ -81,7 +81,7 @@ class MediaTimer {
     TimeStamp mTimeStamp;
     RefPtr<MediaTimerPromise::Private> mPromise;
 
-    explicit Entry(const TimeStamp& aTimeStamp, const char* aCallSite)
+    explicit Entry(const TimeStamp& aTimeStamp, StaticString aCallSite)
         : mTimeStamp(aTimeStamp),
           mPromise(new MediaTimerPromise::Private(aCallSite)) {}
 
diff --git a/dom/media/MediaTrackGraph.cpp b/dom/media/MediaTrackGraph.cpp
index a4f81d0071..e9356548b8 100644
--- a/dom/media/MediaTrackGraph.cpp
+++ b/dom/media/MediaTrackGraph.cpp
@@ -440,11 +440,10 @@ void MediaTrackGraphImpl::CheckDriver() {
   NativeInputTrack* native =
       mDeviceInputTrackManagerGraphThread.GetNativeInputTrack();
   CubebUtils::AudioDeviceID inputDevice = native ? native->mDeviceId : nullptr;
-  uint32_t inputChannelCount =
-      native ? AudioInputChannelCount(native->mDeviceId) : 0;
-  AudioInputType inputPreference =
-      native ? AudioInputDevicePreference(native->mDeviceId)
-             : AudioInputType::Unknown;
+  uint32_t inputChannelCount = AudioInputChannelCount(inputDevice);
+  AudioInputType inputPreference = AudioInputDevicePreference(inputDevice);
+  cubeb_input_processing_params inputProcessingParams =
+      RequestedAudioInputProcessingParams(inputDevice);
 
   uint32_t primaryOutputChannelCount = PrimaryOutputChannelCount();
   if (!audioCallbackDriver) {
@@ -452,7 +451,7 @@ void MediaTrackGraphImpl::CheckDriver() {
       AudioCallbackDriver* driver = new AudioCallbackDriver(
           this, CurrentDriver(), mSampleRate, primaryOutputChannelCount,
           inputChannelCount, PrimaryOutputDeviceID(), inputDevice,
-          inputPreference);
+          inputPreference, inputProcessingParams);
       SwitchAtNextIteration(driver);
     }
     return;
@@ -468,9 +467,14 @@ void MediaTrackGraphImpl::CheckDriver() {
     AudioCallbackDriver* driver = new AudioCallbackDriver(
         this, CurrentDriver(), mSampleRate, primaryOutputChannelCount,
         inputChannelCount, PrimaryOutputDeviceID(), inputDevice,
-        inputPreference);
+        inputPreference, inputProcessingParams);
     SwitchAtNextIteration(driver);
   }
+
+  if (native) {
+    audioCallbackDriver->SetRequestedInputProcessingParams(
+        inputProcessingParams);
+  }
 }
 
 void MediaTrackGraphImpl::UpdateTrackOrder() {
@@ -770,7 +774,8 @@ void MediaTrackGraphImpl::OpenAudioInputImpl(DeviceInputTrack* aTrack) {
     AudioCallbackDriver* driver = new AudioCallbackDriver(
         this, CurrentDriver(), mSampleRate, PrimaryOutputChannelCount(),
         AudioInputChannelCount(aTrack->mDeviceId), PrimaryOutputDeviceID(),
-        aTrack->mDeviceId, AudioInputDevicePreference(aTrack->mDeviceId));
+        aTrack->mDeviceId, AudioInputDevicePreference(aTrack->mDeviceId),
+        aTrack->RequestedProcessingParams());
     LOG(LogLevel::Debug,
         ("%p OpenAudioInputImpl: starting new AudioCallbackDriver(input) %p",
          this, driver));
@@ -842,7 +847,8 @@ void MediaTrackGraphImpl::CloseAudioInputImpl(DeviceInputTrack* aTrack) {
     driver = new AudioCallbackDriver(
         this, CurrentDriver(), mSampleRate, PrimaryOutputChannelCount(),
         AudioInputChannelCount(aTrack->mDeviceId), PrimaryOutputDeviceID(),
-        nullptr, AudioInputDevicePreference(aTrack->mDeviceId));
+        nullptr, AudioInputDevicePreference(aTrack->mDeviceId),
+        aTrack->RequestedProcessingParams());
     SwitchAtNextIteration(driver);
   } else if (CurrentDriver()->AsAudioCallbackDriver()) {
     LOG(LogLevel::Debug,
@@ -937,6 +943,32 @@ void MediaTrackGraphImpl::NotifyInputData(const AudioDataValue* aBuffer,
                           aAlreadyBuffered);
 }
 
+void MediaTrackGraphImpl::NotifySetRequestedInputProcessingParamsResult(
+    AudioCallbackDriver* aDriver,
+    cubeb_input_processing_params aRequestedParams,
+    Result<cubeb_input_processing_params, int>&& aResult) {
+  MOZ_ASSERT(NS_IsMainThread());
+  NativeInputTrack* native =
+      mDeviceInputTrackManagerMainThread.GetNativeInputTrack();
+  if (!native) {
+    return;
+  }
+  QueueControlMessageWithNoShutdown([this, self = RefPtr(this),
+                                     driver = RefPtr(aDriver), aRequestedParams,
+                                     result = std::move(aResult)]() mutable {
+    NativeInputTrack* native =
+        mDeviceInputTrackManagerGraphThread.GetNativeInputTrack();
+    if (!native) {
+      return;
+    }
+    if (driver != mDriver) {
+      return;
+    }
+    native->NotifySetRequestedProcessingParamsResult(this, aRequestedParams,
+                                                     result);
+  });
+}
+
 void MediaTrackGraphImpl::DeviceChangedImpl() {
   MOZ_ASSERT(OnGraphThread());
   NativeInputTrack* native =
@@ -1115,7 +1147,7 @@ void MediaTrackGraphImpl::ReevaluateInputDevice(CubebUtils::AudioDeviceID aID) {
     AudioCallbackDriver* newDriver = new AudioCallbackDriver(
         this, CurrentDriver(), mSampleRate, PrimaryOutputChannelCount(),
         AudioInputChannelCount(aID), PrimaryOutputDeviceID(), aID,
-        AudioInputDevicePreference(aID));
+        AudioInputDevicePreference(aID), track->RequestedProcessingParams());
     SwitchAtNextIteration(newDriver);
   }
 }
@@ -3459,7 +3491,7 @@ void MediaTrackGraphImpl::Init(GraphDriverType aDriverRequested,
       // for the input channel.
       mDriver = new AudioCallbackDriver(
           this, nullptr, mSampleRate, aChannelCount, 0, PrimaryOutputDeviceID(),
-          nullptr, AudioInputType::Unknown);
+          nullptr, AudioInputType::Unknown, CUBEB_INPUT_PROCESSING_PARAM_NONE);
     } else {
       mDriver = new SystemClockDriver(this, nullptr, mSampleRate);
     }
@@ -4257,6 +4289,15 @@ AudioInputType MediaTrackGraphImpl::AudioInputDevicePreference(
                                  : AudioInputType::Unknown;
 }
 
+cubeb_input_processing_params
+MediaTrackGraphImpl::RequestedAudioInputProcessingParams(
+    CubebUtils::AudioDeviceID aID) {
+  MOZ_ASSERT(OnGraphThreadOrNotRunning());
+  DeviceInputTrack* t =
+      mDeviceInputTrackManagerGraphThread.GetDeviceInputTrack(aID);
+  return t ? t->RequestedProcessingParams() : CUBEB_INPUT_PROCESSING_PARAM_NONE;
+}
+
 void MediaTrackGraphImpl::SetNewNativeInput() {
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(!mDeviceInputTrackManagerMainThread.GetNativeInputTrack());
diff --git a/dom/media/MediaTrackGraph.h b/dom/media/MediaTrackGraph.h
index a754b158eb..53783aca27 100644
--- a/dom/media/MediaTrackGraph.h
+++ b/dom/media/MediaTrackGraph.h
@@ -112,12 +112,20 @@ class AudioDataListenerInterface {
   /**
    * Number of audio input channels.
    */
-  virtual uint32_t RequestedInputChannelCount(MediaTrackGraph* aGraph) = 0;
+  virtual uint32_t RequestedInputChannelCount(
+      MediaTrackGraph* aGraph) const = 0;
+
+  /**
+   * The input processing params this listener wants the platform to apply.
+   */
+  virtual cubeb_input_processing_params RequestedInputProcessingParams(
+      MediaTrackGraph* aGraph) const = 0;
 
   /**
    * Whether the underlying audio device is used for voice input.
    */
   virtual bool IsVoiceInput(MediaTrackGraph* aGraph) const = 0;
+
   /**
    * Called when the underlying audio device has changed.
    */
@@ -127,6 +135,14 @@ class AudioDataListenerInterface {
    * Called when the underlying audio device is being closed.
    */
   virtual void Disconnect(MediaTrackGraph* aGraph) = 0;
+
+  /**
+   * Called after an attempt to set the input processing params on the
+   * underlying input track.
+   */
+  virtual void NotifySetRequestedInputProcessingParamsResult(
+      MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+      const Result<cubeb_input_processing_params, int>& aResult) = 0;
 };
 
 class AudioDataListener : public AudioDataListenerInterface {
diff --git a/dom/media/MediaTrackGraphImpl.h b/dom/media/MediaTrackGraphImpl.h
index 5daed83ef3..44c04caaa0 100644
--- a/dom/media/MediaTrackGraphImpl.h
+++ b/dom/media/MediaTrackGraphImpl.h
@@ -509,6 +509,12 @@ class MediaTrackGraphImpl : public MediaTrackGraph,
   void NotifyInputData(const AudioDataValue* aBuffer, size_t aFrames,
                        TrackRate aRate, uint32_t aChannels,
                        uint32_t aAlreadyBuffered) override;
+  /* Called on the main thread after an AudioCallbackDriver has attempted an
+   * operation to set aRequestedParams on the cubeb stream. */
+  void NotifySetRequestedInputProcessingParamsResult(
+      AudioCallbackDriver* aDriver,
+      cubeb_input_processing_params aRequestedParams,
+      Result<cubeb_input_processing_params, int>&& aResult) override;
   /* Called every time there are changes to input/output audio devices like
    * plug/unplug etc. This can be called on any thread, and posts a message to
    * the main thread so that it can post a message to the graph thread. */
@@ -586,6 +592,13 @@ class MediaTrackGraphImpl : public MediaTrackGraph,
 
   AudioInputType AudioInputDevicePreference(CubebUtils::AudioDeviceID aID);
 
+  /**
+   * The input processing params requested for any processing tracks tied to the
+   * input device with id aID.
+   */
+  cubeb_input_processing_params RequestedAudioInputProcessingParams(
+      CubebUtils::AudioDeviceID aID);
+
   double MediaTimeToSeconds(GraphTime aTime) const {
     NS_ASSERTION(aTime > -TRACK_TIME_MAX && aTime <= TRACK_TIME_MAX,
                  "Bad time");
diff --git a/dom/media/SeekJob.cpp b/dom/media/SeekJob.cpp
index 93911638ce..1760cceb35 100644
--- a/dom/media/SeekJob.cpp
+++ b/dom/media/SeekJob.cpp
@@ -18,12 +18,12 @@ bool SeekJob::Exists() const {
   return mTarget.isSome();
 }
 
-void SeekJob::Resolve(const char* aCallSite) {
+void SeekJob::Resolve(StaticString aCallSite) {
   mPromise.Resolve(true, aCallSite);
   mTarget.reset();
 }
 
-void SeekJob::RejectIfExists(const char* aCallSite) {
+void SeekJob::RejectIfExists(StaticString aCallSite) {
   mTarget.reset();
   mPromise.RejectIfExists(true, aCallSite);
 }
diff --git a/dom/media/SeekJob.h b/dom/media/SeekJob.h
index 1bdd6913f3..9e1e404d91 100644
--- a/dom/media/SeekJob.h
+++ b/dom/media/SeekJob.h
@@ -20,8 +20,8 @@ struct SeekJob {
   ~SeekJob();
 
   bool Exists() const;
-  void Resolve(const char* aCallSite);
-  void RejectIfExists(const char* aCallSite);
+  void Resolve(StaticString aCallSite);
+  void RejectIfExists(StaticString aCallSite);
 
   Maybe<SeekTarget> mTarget;
   MozPromiseHolder<MediaDecoder::SeekPromise> mPromise;
diff --git a/dom/media/VideoFrameConverter.h b/dom/media/VideoFrameConverter.h
index 31b3104955..43a4075b04 100644
--- a/dom/media/VideoFrameConverter.h
+++ b/dom/media/VideoFrameConverter.h
@@ -7,7 +7,7 @@
 #define VideoFrameConverter_h
 
 #include "ImageContainer.h"
-#include "ImageToI420.h"
+#include "ImageConversion.h"
 #include "Pacer.h"
 #include "PerformanceRecorder.h"
 #include "VideoSegment.h"
diff --git a/dom/media/VideoUtils.cpp b/dom/media/VideoUtils.cpp
index 24b1f0dd59..31fe3242dc 100644
--- a/dom/media/VideoUtils.cpp
+++ b/dom/media/VideoUtils.cpp
@@ -10,10 +10,13 @@
 #include "ImageContainer.h"
 #include "MediaContainerType.h"
 #include "MediaResource.h"
+#include "PDMFactory.h"
 #include "TimeUnits.h"
 #include "mozilla/Base64.h"
 #include "mozilla/dom/ContentChild.h"
+#include "mozilla/gfx/gfxVars.h"
 #include "mozilla/SchedulerGroup.h"
+#include "mozilla/ScopeExit.h"
 #include "mozilla/SharedThreadPool.h"
 #include "mozilla/StaticPrefs_accessibility.h"
 #include "mozilla/StaticPrefs_media.h"
@@ -28,6 +31,10 @@
 #include "nsServiceManagerUtils.h"
 #include "nsThreadUtils.h"
 
+#ifdef XP_WIN
+#  include "WMFDecoderModule.h"
+#endif
+
 namespace mozilla {
 
 using gfx::ColorRange;
@@ -1247,4 +1254,18 @@ void DetermineResolutionForTelemetry(const MediaInfo& aInfo,
   aResolutionOut.AppendASCII(resolution);
 }
 
+bool ContainHardwareCodecsSupported(
+    const media::MediaCodecsSupported& aSupport) {
+  return aSupport.contains(
+             mozilla::media::MediaCodecsSupport::H264HardwareDecode) ||
+         aSupport.contains(
+             mozilla::media::MediaCodecsSupport::VP8HardwareDecode) ||
+         aSupport.contains(
+             mozilla::media::MediaCodecsSupport::VP9HardwareDecode) ||
+         aSupport.contains(
+             mozilla::media::MediaCodecsSupport::AV1HardwareDecode) ||
+         aSupport.contains(
+             mozilla::media::MediaCodecsSupport::HEVCHardwareDecode);
+}
+
 }  // end namespace mozilla
diff --git a/dom/media/VideoUtils.h b/dom/media/VideoUtils.h
index b1dbb0cf2b..ce20226a02 100644
--- a/dom/media/VideoUtils.h
+++ b/dom/media/VideoUtils.h
@@ -9,6 +9,7 @@
 
 #include "AudioSampleFormat.h"
 #include "MediaInfo.h"
+#include "MediaCodecsSupport.h"
 #include "VideoLimits.h"
 #include "mozilla/AbstractThread.h"
 #include "mozilla/Attributes.h"
@@ -553,6 +554,10 @@ bool IsWaveMimetype(const nsACString& aMimeType);
 void DetermineResolutionForTelemetry(const MediaInfo& aInfo,
                                      nsCString& aResolutionOut);
 
+// True if given MediaCodecsSupported contains any hardware decoding support.
+bool ContainHardwareCodecsSupported(
+    const media::MediaCodecsSupported& aSupport);
+
 }  // end namespace mozilla
 
 #endif
diff --git a/dom/media/WavDumper.h b/dom/media/WavDumper.h
index de4195066a..971fa8a32f 100644
--- a/dom/media/WavDumper.h
+++ b/dom/media/WavDumper.h
@@ -107,13 +107,23 @@ class WavDumper {
     if (!mFile) {
       return;
     }
-    WriteDumpFileHelper(aBuffer, aSamples);
+    if (aBuffer) {
+      WriteDumpFileHelper(aBuffer, aSamples);
+    } else {
+      constexpr size_t blockSize = 128;
+      T block[blockSize] = {};
+      for (size_t remaining = aSamples; remaining;) {
+        size_t toWrite = std::min(remaining, blockSize);
+        fwrite(block, sizeof(T), toWrite, mFile);
+        remaining -= toWrite;
+      }
+    }
+    fflush(mFile);
   }
 
  private:
   void WriteDumpFileHelper(const int16_t* aInput, size_t aSamples) {
     mozilla::Unused << fwrite(aInput, sizeof(int16_t), aSamples, mFile);
-    fflush(mFile);
   }
 
   void WriteDumpFileHelper(const float* aInput, size_t aSamples) {
@@ -127,7 +137,6 @@ class WavDumper {
       MOZ_ASSERT(rv);
     }
     mozilla::Unused << fwrite(buf.Elements(), buf.Length(), 1, mFile);
-    fflush(mFile);
   }
 
   FILE* mFile = nullptr;
diff --git a/dom/media/doctor/DDLifetime.cpp b/dom/media/doctor/DDLifetime.cpp
index 2d4c6cb966..c1d2a01a1c 100644
--- a/dom/media/doctor/DDLifetime.cpp
+++ b/dom/media/doctor/DDLifetime.cpp
@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "DDLifetime.h"
+#include "mozilla/IntegerPrintfMacros.h"
 
 namespace mozilla {
 
diff --git a/dom/media/doctor/test/gtest/moz.build b/dom/media/doctor/test/gtest/moz.build
index 7ae9eae130..3ee3f23f4d 100644
--- a/dom/media/doctor/test/gtest/moz.build
+++ b/dom/media/doctor/test/gtest/moz.build
@@ -6,10 +6,15 @@
 
 if CONFIG["OS_TARGET"] != "Android":
     UNIFIED_SOURCES += [
-        "TestMultiWriterQueue.cpp",
         "TestRollingNumber.cpp",
     ]
 
+    # Bug 1894309 - Fails under TSAN
+    if not CONFIG["MOZ_TSAN"]:
+        UNIFIED_SOURCES += [
+            "TestMultiWriterQueue.cpp",
+        ]
+
 include("/ipc/chromium/chromium-config.mozbuild")
 
 LOCAL_INCLUDES += [
diff --git a/dom/media/driftcontrol/AudioDriftCorrection.cpp b/dom/media/driftcontrol/AudioDriftCorrection.cpp
index e66c435c36..1b86a99a44 100644
--- a/dom/media/driftcontrol/AudioDriftCorrection.cpp
+++ b/dom/media/driftcontrol/AudioDriftCorrection.cpp
@@ -35,8 +35,8 @@ AudioDriftCorrection::AudioDriftCorrection(
     : mTargetRate(aTargetRate),
       mDriftController(MakeUnique<DriftController>(aSourceRate, aTargetRate,
                                                    mDesiredBuffering)),
-      mResampler(MakeUnique<AudioResampler>(
-          aSourceRate, aTargetRate, mDesiredBuffering, aPrincipalHandle)) {}
+      mResampler(MakeUnique<AudioResampler>(aSourceRate, aTargetRate, 0,
+                                            aPrincipalHandle)) {}
 
 AudioDriftCorrection::~AudioDriftCorrection() = default;
 
@@ -94,7 +94,7 @@ AudioSegment AudioDriftCorrection::RequestFrames(const AudioSegment& aInput,
   mDriftController->UpdateClock(inputDuration, outputDuration,
                                 CurrentBuffering(), BufferSize());
   // Update resampler's rate if there is a new correction.
-  mResampler->UpdateOutRate(mDriftController->GetCorrectedTargetRate());
+  mResampler->UpdateInRate(mDriftController->GetCorrectedSourceRate());
   if (hasUnderrun) {
     if (!mIsHandlingUnderrun) {
       NS_WARNING("Drift-correction: Underrun");
@@ -171,7 +171,8 @@ void AudioDriftCorrection::SetDesiredBuffering(
     media::TimeUnit aDesiredBuffering) {
   mDesiredBuffering = aDesiredBuffering;
   mDriftController->SetDesiredBuffering(mDesiredBuffering);
-  mResampler->SetPreBufferDuration(mDesiredBuffering);
+  mResampler->SetInputPreBufferFrameCount(
+      mDesiredBuffering.ToTicksAtRate(mDriftController->mSourceRate));
 }
 }  // namespace mozilla
 
diff --git a/dom/media/driftcontrol/AudioResampler.cpp b/dom/media/driftcontrol/AudioResampler.cpp
index ecef033a5c..1402fae39e 100644
--- a/dom/media/driftcontrol/AudioResampler.cpp
+++ b/dom/media/driftcontrol/AudioResampler.cpp
@@ -5,12 +5,14 @@
 
 #include "AudioResampler.h"
 
+#include "TimeUnits.h"
+
 namespace mozilla {
 
 AudioResampler::AudioResampler(uint32_t aInRate, uint32_t aOutRate,
-                               media::TimeUnit aPreBufferDuration,
+                               uint32_t aInputPreBufferFrameCount,
                                const PrincipalHandle& aPrincipalHandle)
-    : mResampler(aInRate, aOutRate, aPreBufferDuration),
+    : mResampler(aInRate, aOutRate, aInputPreBufferFrameCount),
       mOutputChunks(aOutRate / 10, STEREO, aPrincipalHandle) {}
 
 void AudioResampler::AppendInput(const AudioSegment& aInSegment) {
@@ -59,11 +61,11 @@ AudioSegment AudioResampler::Resample(uint32_t aOutFrames, bool* aHasUnderrun) {
     return segment;
   }
 
-  media::TimeUnit outDuration(aOutFrames, mResampler.GetOutRate());
+  media::TimeUnit outDuration(aOutFrames, mResampler.mOutRate);
   mResampler.EnsurePreBuffer(outDuration);
 
   const media::TimeUnit chunkCapacity(mOutputChunks.ChunkCapacity(),
-                                      mResampler.GetOutRate());
+                                      mResampler.mOutRate);
 
   while (!outDuration.IsZero()) {
     MOZ_ASSERT(outDuration.IsPositive());
@@ -71,8 +73,7 @@ AudioSegment AudioResampler::Resample(uint32_t aOutFrames, bool* aHasUnderrun) {
     const media::TimeUnit chunkDuration = std::min(outDuration, chunkCapacity);
     outDuration -= chunkDuration;
 
-    const uint32_t outFrames =
-        chunkDuration.ToTicksAtRate(mResampler.GetOutRate());
+    const uint32_t outFrames = chunkDuration.ToTicksAtRate(mResampler.mOutRate);
     for (uint32_t i = 0; i < chunk.ChannelCount(); ++i) {
       if (chunk.mBufferFormat == AUDIO_FORMAT_FLOAT32) {
         *aHasUnderrun |= mResampler.Resample(
@@ -92,8 +93,8 @@ AudioSegment AudioResampler::Resample(uint32_t aOutFrames, bool* aHasUnderrun) {
   return segment;
 }
 
-void AudioResampler::Update(uint32_t aOutRate, uint32_t aChannels) {
-  mResampler.UpdateResampler(aOutRate, aChannels);
+void AudioResampler::Update(uint32_t aInRate, uint32_t aChannels) {
+  mResampler.UpdateResampler(aInRate, aChannels);
   mOutputChunks.Update(aChannels);
 }
 
diff --git a/dom/media/driftcontrol/AudioResampler.h b/dom/media/driftcontrol/AudioResampler.h
index 20e4f1051b..c5982c3a39 100644
--- a/dom/media/driftcontrol/AudioResampler.h
+++ b/dom/media/driftcontrol/AudioResampler.h
@@ -9,12 +9,11 @@
 #include "AudioChunkList.h"
 #include "AudioSegment.h"
 #include "DynamicResampler.h"
-#include "TimeUnits.h"
 
 namespace mozilla {
 
 /**
- * Audio Resampler is a resampler able to change the output rate and channels
+ * Audio Resampler is a resampler able to change the input rate and channels
  * count on the fly. The API is simple and it is based in AudioSegment in order
  * to be used MTG. Memory allocations, for input and output buffers, will happen
  * in the constructor, when channel count changes and if the amount of input
@@ -36,7 +35,7 @@ namespace mozilla {
 class AudioResampler final {
  public:
   AudioResampler(uint32_t aInRate, uint32_t aOutRate,
-                 media::TimeUnit aPreBufferDuration,
+                 uint32_t aInputPreBufferFrameCount,
                  const PrincipalHandle& aPrincipalHandle);
 
   /**
@@ -69,24 +68,24 @@ class AudioResampler final {
   AudioSegment Resample(uint32_t aOutFrames, bool* aHasUnderrun);
 
   /*
-   * Updates the output rate that will be used by the resampler.
+   * Updates the input rate that will be used by the resampler.
    */
-  void UpdateOutRate(uint32_t aOutRate) {
-    Update(aOutRate, mResampler.GetChannels());
+  void UpdateInRate(uint32_t aInRate) {
+    Update(aInRate, mResampler.GetChannels());
   }
 
   /**
-   * Set the duration that should be used for pre-buffering.
+   * Set the number of frames that should be used for input pre-buffering.
    */
-  void SetPreBufferDuration(media::TimeUnit aPreBufferDuration) {
-    mResampler.SetPreBufferDuration(aPreBufferDuration);
+  void SetInputPreBufferFrameCount(uint32_t aInputPreBufferFrameCount) {
+    mResampler.SetInputPreBufferFrameCount(aInputPreBufferFrameCount);
   }
 
  private:
   void UpdateChannels(uint32_t aChannels) {
-    Update(mResampler.GetOutRate(), aChannels);
+    Update(mResampler.GetInRate(), aChannels);
   }
-  void Update(uint32_t aOutRate, uint32_t aChannels);
+  void Update(uint32_t aInRate, uint32_t aChannels);
 
  private:
   DynamicResampler mResampler;
diff --git a/dom/media/driftcontrol/DriftController.cpp b/dom/media/driftcontrol/DriftController.cpp
index b5603f72bb..791bfe9614 100644
--- a/dom/media/driftcontrol/DriftController.cpp
+++ b/dom/media/driftcontrol/DriftController.cpp
@@ -50,7 +50,7 @@ DriftController::DriftController(uint32_t aSourceRate, uint32_t aTargetRate,
       mSourceRate(aSourceRate),
       mTargetRate(aTargetRate),
       mDesiredBuffering(aDesiredBuffering),
-      mCorrectedTargetRate(static_cast<float>(aTargetRate)),
+      mCorrectedSourceRate(static_cast<float>(aSourceRate)),
       mMeasuredSourceLatency(5),
       mMeasuredTargetLatency(5) {
   LOG_CONTROLLER(
@@ -76,8 +76,8 @@ void DriftController::ResetAfterUnderrun() {
   mTargetClock = mAdjustmentInterval;
 }
 
-uint32_t DriftController::GetCorrectedTargetRate() const {
-  return std::lround(mCorrectedTargetRate);
+uint32_t DriftController::GetCorrectedSourceRate() const {
+  return std::lround(mCorrectedSourceRate);
 }
 
 void DriftController::UpdateClock(media::TimeUnit aSourceDuration,
@@ -112,14 +112,16 @@ void DriftController::CalculateCorrection(uint32_t aBufferedFrames,
   static constexpr float kDerivativeGain = 0.12;
 
   // Maximum 0.1% change per update.
-  const float cap = static_cast<float>(mTargetRate) / 1000.0f;
+  const float cap = static_cast<float>(mSourceRate) / 1000.0f;
 
   // The integral term can make us grow far outside the cap. Impose a cap on
   // it individually that is roughly equivalent to the final cap.
   const float integralCap = cap / kIntegralGain;
 
-  int32_t error = CheckedInt32(mDesiredBuffering.ToTicksAtRate(mSourceRate) -
-                               aBufferedFrames)
+  // Use nominal (not corrected) source rate when interpreting desired
+  // buffering so that the set point is independent of the control value.
+  int32_t error = CheckedInt32(aBufferedFrames -
+                               mDesiredBuffering.ToTicksAtRate(mSourceRate))
                       .value();
   int32_t proportional = error;
   // targetClockSec is the number of target clock seconds since last
@@ -135,12 +137,12 @@ void DriftController::CalculateCorrection(uint32_t aBufferedFrames,
                         kIntegralGain * mIntegral +
                         kDerivativeGain * derivative;
   float correctedRate =
-      std::clamp(static_cast<float>(mTargetRate) + controlSignal,
-                 mCorrectedTargetRate - cap, mCorrectedTargetRate + cap);
+      std::clamp(static_cast<float>(mSourceRate) + controlSignal,
+                 mCorrectedSourceRate - cap, mCorrectedSourceRate + cap);
 
   // mDesiredBuffering is divided by this to calculate the amount of
   // hysteresis to apply. With a denominator of 5, an error within +/- 20% of
-  // the desired buffering will not make corrections to the target sample
+  // the desired buffering will not make corrections to the source sample
   // rate.
   static constexpr uint32_t kHysteresisDenominator = 5;  // +/- 20%
 
@@ -183,7 +185,7 @@ void DriftController::CalculateCorrection(uint32_t aBufferedFrames,
       return correctedRate;
     }
 
-    return mCorrectedTargetRate;
+    return mCorrectedSourceRate;
   }();
 
   if (mDurationWithinHysteresis > mIntegralCapTimeLimit) {
@@ -201,10 +203,10 @@ void DriftController::CalculateCorrection(uint32_t aBufferedFrames,
   LOG_CONTROLLER(
       LogLevel::Verbose, this,
       "Recalculating Correction: Nominal: %uHz->%uHz, Corrected: "
-      "%uHz->%.2fHz  (diff %.2fHz), error: %.2fms (hysteresisThreshold: "
+      "%.2fHz->%uHz  (diff %.2fHz), error: %.2fms (hysteresisThreshold: "
       "%.2fms), buffering: %.2fms, desired buffering: %.2fms",
-      mSourceRate, mTargetRate, mSourceRate, hysteresisCorrectedRate,
-      hysteresisCorrectedRate - mCorrectedTargetRate,
+      mSourceRate, mTargetRate, hysteresisCorrectedRate, mTargetRate,
+      hysteresisCorrectedRate - mCorrectedSourceRate,
       media::TimeUnit(error, mSourceRate).ToSeconds() * 1000.0,
       media::TimeUnit(hysteresisThreshold, mSourceRate).ToSeconds() * 1000.0,
       media::TimeUnit(aBufferedFrames, mSourceRate).ToSeconds() * 1000.0,
@@ -219,13 +221,13 @@ void DriftController::CalculateCorrection(uint32_t aBufferedFrames,
                   kProportionalGain * proportional, kIntegralGain * mIntegral,
                   kDerivativeGain * derivative, controlSignal);
 
-  if (std::lround(mCorrectedTargetRate) !=
+  if (std::lround(mCorrectedSourceRate) !=
       std::lround(hysteresisCorrectedRate)) {
     ++mNumCorrectionChanges;
   }
 
   mPreviousError = error;
-  mCorrectedTargetRate = hysteresisCorrectedRate;
+  mCorrectedSourceRate = std::max(1.f, hysteresisCorrectedRate);
 
   // Reset the counters to prepare for the next period.
   mTargetClock = media::TimeUnit::Zero();
diff --git a/dom/media/driftcontrol/DriftController.h b/dom/media/driftcontrol/DriftController.h
index 0bd745c737..e8dbc57e0e 100644
--- a/dom/media/driftcontrol/DriftController.h
+++ b/dom/media/driftcontrol/DriftController.h
@@ -22,8 +22,8 @@ namespace mozilla {
  * the calculations.
  *
  * The DriftController looks at how the current buffering level differs from the
- * desired buffering level and sets a corrected target rate. A resampler should
- * be configured to resample from the nominal source rate to the corrected
+ * desired buffering level and sets a corrected source rate. A resampler should
+ * be configured to resample from the corrected source rate to the nominal
  * target rate. It assumes that the resampler is initially configured to
  * resample from the nominal source rate to the nominal target rate.
  *
@@ -53,12 +53,12 @@ class DriftController final {
   void ResetAfterUnderrun();
 
   /**
-   * Returns the drift-corrected target rate.
+   * Returns the drift-corrected source rate.
    */
-  uint32_t GetCorrectedTargetRate() const;
+  uint32_t GetCorrectedSourceRate() const;
 
   /**
-   * The number of times mCorrectedTargetRate has been changed to adjust to
+   * The number of times mCorrectedSourceRate has been changed to adjust to
    * drift.
    */
   uint32_t NumCorrectionChanges() const { return mNumCorrectionChanges; }
@@ -102,9 +102,12 @@ class DriftController final {
   // This implements a simple PID controller with feedback.
   // Set point:     SP = mDesiredBuffering.
   // Process value: PV(t) = aBufferedFrames. This is the feedback.
-  // Error:         e(t) = mDesiredBuffering - aBufferedFrames.
-  // Control value: CV(t) = the number to add to the nominal target rate, i.e.
-  //                the corrected target rate = CV(t) + nominal target rate.
+  // Error:         e(t) = aBufferedFrames - mDesiredBuffering.
+  //                Error is positive when the process value is high, which is
+  //                the opposite of conventional PID controllers because this
+  //                is a reverse-acting system.
+  // Control value: CV(t) = the value to add to the nominal source rate, i.e.
+  //                the corrected source rate = nominal source rate + CV(t).
   //
   // Controller:
   // Proportional part: The error, p(t) = e(t), multiplied by a gain factor, Kp.
@@ -115,13 +118,13 @@ class DriftController final {
   // Control signal:    The sum of the parts' output,
   //                    u(t) = Kp*p(t) + Ki*i(t) + Kd*d(t).
   //
-  // Control action: Converting the control signal to a target sample rate.
+  // Control action: Converting the control signal to a source sample rate.
   //                 Simplified, a positive control signal means the buffer is
-  //                 lower than desired (because the error is positive), so the
-  //                 target sample rate must be increased in order to consume
-  //                 input data slower. We calculate the corrected target rate
-  //                 by simply adding the control signal, u(t), to the nominal
-  //                 target rate.
+  //                 higher than desired (because the error is positive),
+  //                 so the source sample rate must be increased in order to
+  //                 consume input data faster.
+  //                 We calculate the corrected source rate by simply adding
+  //                 the control signal, u(t), to the nominal source rate.
   //
   // Hysteresis: As long as the error is within a threshold of 20% of the set
   //             point (desired buffering level) (up to 10ms for >50ms desired
@@ -144,7 +147,7 @@ class DriftController final {
   int32_t mPreviousError = 0;
   float mIntegral = 0.0;
   Maybe<float> mIntegralCenterForCap;
-  float mCorrectedTargetRate;
+  float mCorrectedSourceRate;
   Maybe<int32_t> mLastHysteresisBoundaryCorrection;
   media::TimeUnit mDurationWithinHysteresis;
   uint32_t mNumCorrectionChanges = 0;
diff --git a/dom/media/driftcontrol/DynamicResampler.cpp b/dom/media/driftcontrol/DynamicResampler.cpp
index e6f230278e..65a2ae3b57 100644
--- a/dom/media/driftcontrol/DynamicResampler.cpp
+++ b/dom/media/driftcontrol/DynamicResampler.cpp
@@ -8,14 +8,13 @@
 namespace mozilla {
 
 DynamicResampler::DynamicResampler(uint32_t aInRate, uint32_t aOutRate,
-                                   media::TimeUnit aPreBufferDuration)
-    : mInRate(aInRate),
-      mPreBufferDuration(aPreBufferDuration),
-      mOutRate(aOutRate) {
+                                   uint32_t aInputPreBufferFrameCount)
+    : mOutRate(aOutRate),
+      mInputPreBufferFrameCount(aInputPreBufferFrameCount),
+      mInRate(aInRate) {
   MOZ_ASSERT(aInRate);
   MOZ_ASSERT(aOutRate);
-  MOZ_ASSERT(aPreBufferDuration.IsPositiveOrZero());
-  UpdateResampler(mOutRate, STEREO);
+  UpdateResampler(mInRate, STEREO);
   mInputStreamFile.Open("DynamicResamplerInFirstChannel", 1, mInRate);
   mOutputStreamFile.Open("DynamicResamplerOutFirstChannel", 1, mOutRate);
 }
@@ -35,7 +34,10 @@ void DynamicResampler::SetSampleFormat(AudioSampleFormat aFormat) {
     b.SetSampleFormat(mSampleFormat);
   }
 
-  EnsureInputBufferDuration(CalculateInputBufferDuration());
+  // Pre-allocate something big.
+  // EnsureInputBufferDuration() adds 50ms for jitter to this first allocation
+  // so the 50ms argument means at least 100ms.
+  EnsureInputBufferSizeInFrames(mInRate / 20);
 }
 
 void DynamicResampler::EnsurePreBuffer(media::TimeUnit aDuration) {
@@ -43,33 +45,36 @@ void DynamicResampler::EnsurePreBuffer(media::TimeUnit aDuration) {
     return;
   }
 
-  media::TimeUnit buffered(mInternalInBuffer[0].AvailableRead(), mInRate);
-  if (buffered.IsZero()) {
+  uint32_t buffered = mInternalInBuffer[0].AvailableRead();
+  if (buffered == 0) {
     // Wait for the first input segment before deciding how much to pre-buffer.
     // If it is large it indicates high-latency, and the buffer would have to
-    // handle that.
+    // handle that.  This also means that the pre-buffer is not set up just
+    // before a large input segment would extend the buffering beyond the
+    // desired level.
     return;
   }
 
   mIsPreBufferSet = true;
 
-  media::TimeUnit needed = aDuration + mPreBufferDuration;
-  EnsureInputBufferDuration(needed);
+  uint32_t needed =
+      aDuration.ToTicksAtRate(mInRate) + mInputPreBufferFrameCount;
+  EnsureInputBufferSizeInFrames(needed);
 
   if (needed > buffered) {
     for (auto& b : mInternalInBuffer) {
-      b.PrependSilence((needed - buffered).ToTicksAtRate(mInRate));
+      b.PrependSilence(needed - buffered);
     }
   } else if (needed < buffered) {
     for (auto& b : mInternalInBuffer) {
-      b.Discard((buffered - needed).ToTicksAtRate(mInRate));
+      b.Discard(buffered - needed);
     }
   }
 }
 
-void DynamicResampler::SetPreBufferDuration(media::TimeUnit aDuration) {
-  MOZ_ASSERT(aDuration.IsPositive());
-  mPreBufferDuration = aDuration;
+void DynamicResampler::SetInputPreBufferFrameCount(
+    uint32_t aInputPreBufferFrameCount) {
+  mInputPreBufferFrameCount = aInputPreBufferFrameCount;
 }
 
 bool DynamicResampler::Resample(float* aOutBuffer, uint32_t aOutFrames,
@@ -93,7 +98,6 @@ void DynamicResampler::ResampleInternal(const float* aInBuffer,
   MOZ_ASSERT(mInRate);
   MOZ_ASSERT(mOutRate);
 
-  MOZ_ASSERT(aInBuffer);
   MOZ_ASSERT(aInFrames);
   MOZ_ASSERT(*aInFrames > 0);
   MOZ_ASSERT(aOutBuffer);
@@ -125,7 +129,6 @@ void DynamicResampler::ResampleInternal(const int16_t* aInBuffer,
   MOZ_ASSERT(mInRate);
   MOZ_ASSERT(mOutRate);
 
-  MOZ_ASSERT(aInBuffer);
   MOZ_ASSERT(aInFrames);
   MOZ_ASSERT(*aInFrames > 0);
   MOZ_ASSERT(aOutBuffer);
@@ -147,19 +150,20 @@ void DynamicResampler::ResampleInternal(const int16_t* aInBuffer,
   }
 }
 
-void DynamicResampler::UpdateResampler(uint32_t aOutRate, uint32_t aChannels) {
-  MOZ_ASSERT(aOutRate);
+void DynamicResampler::UpdateResampler(uint32_t aInRate, uint32_t aChannels) {
+  MOZ_ASSERT(aInRate);
   MOZ_ASSERT(aChannels);
 
   if (mChannels != aChannels) {
+    uint32_t bufferSizeInFrames = InFramesBufferSize();
     if (mResampler) {
       speex_resampler_destroy(mResampler);
     }
-    mResampler = speex_resampler_init(aChannels, mInRate, aOutRate,
+    mResampler = speex_resampler_init(aChannels, aInRate, mOutRate,
                                       SPEEX_RESAMPLER_QUALITY_MIN, nullptr);
     MOZ_ASSERT(mResampler);
     mChannels = aChannels;
-    mOutRate = aOutRate;
+    mInRate = aInRate;
     // Between mono and stereo changes, keep always allocated 2 channels to
     // avoid reallocations in the most common case.
     if ((mChannels == STEREO || mChannels == 1) &&
@@ -192,14 +196,12 @@ void DynamicResampler::UpdateResampler(uint32_t aOutRate, uint32_t aChannels) {
         b->SetSampleFormat(mSampleFormat);
       }
     }
-    media::TimeUnit d = mSetBufferDuration;
-    mSetBufferDuration = media::TimeUnit::Zero();
-    EnsureInputBufferDuration(d);
+    EnsureInputBufferSizeInFrames(bufferSizeInFrames);
     mInputTail.SetLength(mChannels);
     return;
   }
 
-  if (mOutRate != aOutRate) {
+  if (mInRate != aInRate) {
     // If the rates was the same the resampler was not being used so warm up.
     if (mOutRate == mInRate) {
       WarmUpResampler(true);
@@ -208,9 +210,9 @@ void DynamicResampler::UpdateResampler(uint32_t aOutRate, uint32_t aChannels) {
 #ifdef DEBUG
     int rv =
 #endif
-        speex_resampler_set_rate(mResampler, mInRate, aOutRate);
+        speex_resampler_set_rate(mResampler, aInRate, mOutRate);
     MOZ_ASSERT(rv == RESAMPLER_ERR_SUCCESS);
-    mOutRate = aOutRate;
+    mInRate = aInRate;
   }
 }
 
@@ -236,13 +238,9 @@ void DynamicResampler::WarmUpResampler(bool aSkipLatency) {
     }
   }
   if (aSkipLatency) {
-    int inputLatency = speex_resampler_get_input_latency(mResampler);
-    MOZ_ASSERT(inputLatency > 0);
-    uint32_t ratioNum, ratioDen;
-    speex_resampler_get_ratio(mResampler, &ratioNum, &ratioDen);
-    // Ratio at this point is one so only skip the input latency. No special
-    // calculations are needed.
-    speex_resampler_set_skip_frac_num(mResampler, inputLatency * ratioDen);
+    // Don't generate output frames corresponding to times before the next
+    // input sample.
+    speex_resampler_skip_zeros(mResampler);
   }
   mIsWarmingUp = false;
 }
@@ -268,7 +266,16 @@ void DynamicResampler::AppendInputSilence(const uint32_t aInFrames) {
 }
 
 uint32_t DynamicResampler::InFramesBufferSize() const {
-  return mSetBufferDuration.ToTicksAtRate(mInRate);
+  if (mSampleFormat == AUDIO_FORMAT_SILENCE) {
+    return 0;
+  }
+  // Buffers may have different capacities if a memory allocation has failed.
+  MOZ_ASSERT(!mInternalInBuffer.IsEmpty());
+  uint32_t min = std::numeric_limits<uint32_t>::max();
+  for (const auto& b : mInternalInBuffer) {
+    min = std::min(min, b.Capacity());
+  }
+  return min;
 }
 
 uint32_t DynamicResampler::InFramesBuffered(uint32_t aChannelIndex) const {
@@ -276,7 +283,7 @@ uint32_t DynamicResampler::InFramesBuffered(uint32_t aChannelIndex) const {
   MOZ_ASSERT(aChannelIndex <= mChannels);
   MOZ_ASSERT(aChannelIndex <= mInternalInBuffer.Length());
   if (!mIsPreBufferSet) {
-    return mPreBufferDuration.ToTicksAtRate(mInRate);
+    return mInputPreBufferFrameCount;
   }
   return mInternalInBuffer[aChannelIndex].AvailableRead();
 }
diff --git a/dom/media/driftcontrol/DynamicResampler.h b/dom/media/driftcontrol/DynamicResampler.h
index c1b9000aa0..1f601c898b 100644
--- a/dom/media/driftcontrol/DynamicResampler.h
+++ b/dom/media/driftcontrol/DynamicResampler.h
@@ -27,15 +27,13 @@ const uint32_t STEREO = 2;
  * to allow the requested to be resampled and returned.
  *
  * Input data buffering makes use of the AudioRingBuffer. The capacity of the
- * buffer is initially 100ms of float audio and it is pre-allocated at the
- * constructor. Should the input data grow beyond that, the input buffer is
- * re-allocated on the fly. In addition to that, due to special feature of
+ * buffer is initially 100ms of audio and it is pre-allocated during
+ * SetSampleFormat(). Should the input data grow beyond that, the input buffer
+ * is re-allocated on the fly. In addition to that, due to special feature of
  * AudioRingBuffer, no extra copies take place when the input data is fed to the
  * resampler.
  *
- * The sample format must be set before using any method. If the provided sample
- * format is of type short the pre-allocated capacity of the input buffer
- * becomes 200ms of short audio.
+ * The sample format must be set before using any method.
  *
  * The DynamicResampler is not thread-safe, so all the methods appart from the
  * constructor must be called on the same thread.
@@ -47,16 +45,15 @@ class DynamicResampler final {
    * The channel count will be set to stereo. Memory allocation will take
    * place. The input buffer is non-interleaved.
    */
-  DynamicResampler(
-      uint32_t aInRate, uint32_t aOutRate,
-      media::TimeUnit aPreBufferDuration = media::TimeUnit::Zero());
+  DynamicResampler(uint32_t aInRate, uint32_t aOutRate,
+                   uint32_t aInputPreBufferFrameCount = 0);
   ~DynamicResampler();
 
   /**
    * Set the sample format type to float or short.
    */
   void SetSampleFormat(AudioSampleFormat aFormat);
-  uint32_t GetOutRate() const { return mOutRate; }
+  uint32_t GetInRate() const { return mInRate; }
   uint32_t GetChannels() const { return mChannels; }
 
   /**
@@ -81,16 +78,16 @@ class DynamicResampler final {
 
   /**
    * Prepends existing input data with a silent pre-buffer if not already done.
-   * Data will be prepended so that after resampling aOutFrames worth of output
-   * data, the buffering level will be as close as possible to
-   * mPreBufferDuration, which is the desired buffering level.
+   * Data will be prepended so that after resampling aDuration of data,
+   * the buffering level will be as close as possible to
+   * mInputPreBufferFrameCount, which is the desired buffering level.
    */
   void EnsurePreBuffer(media::TimeUnit aDuration);
 
   /**
-   * Set the duration that should be used for pre-buffering.
+   * Set the number of frames that should be used for input pre-buffering.
    */
-  void SetPreBufferDuration(media::TimeUnit aDuration);
+  void SetInputPreBufferFrameCount(uint32_t aInputPreBufferFrameCount);
 
   /*
    * Resample as much frames as needed from the internal input buffer to the
@@ -114,14 +111,14 @@ class DynamicResampler final {
 
   /**
    * Update the output rate or/and the channel count. If a value is not updated
-   * compared to the current one nothing happens. Changing the `aOutRate`
+   * compared to the current one nothing happens. Changing the `aInRate`
    * results in recalculation in the resampler. Changing `aChannels` results in
    * the reallocation of the internal input buffer with the exception of
    * changes between mono to stereo and vice versa where no reallocation takes
    * place. A stereo internal input buffer is always maintained even if the
    * sound is mono.
    */
-  void UpdateResampler(uint32_t aOutRate, uint32_t aChannels);
+  void UpdateResampler(uint32_t aInRate, uint32_t aChannels);
 
  private:
   template <typename T>
@@ -174,24 +171,24 @@ class DynamicResampler final {
     }
 
     uint32_t totalOutFramesNeeded = aOutFrames;
-    auto resample = [&] {
-      mInternalInBuffer[aChannelIndex].ReadNoCopy(
-          [&](const Span<const T>& aInBuffer) -> uint32_t {
-            if (!totalOutFramesNeeded) {
-              return 0;
-            }
-            uint32_t outFramesResampled = totalOutFramesNeeded;
-            uint32_t inFrames = aInBuffer.Length();
-            ResampleInternal(aInBuffer.data(), &inFrames, aOutBuffer,
-                             &outFramesResampled, aChannelIndex);
-            aOutBuffer += outFramesResampled;
-            totalOutFramesNeeded -= outFramesResampled;
-            mInputTail[aChannelIndex].StoreTail<T>(aInBuffer.To(inFrames));
-            return inFrames;
-          });
+    auto resample = [&](const T* aInBuffer, uint32_t aInLength) -> uint32_t {
+      uint32_t outFramesResampled = totalOutFramesNeeded;
+      uint32_t inFrames = aInLength;
+      ResampleInternal(aInBuffer, &inFrames, aOutBuffer, &outFramesResampled,
+                       aChannelIndex);
+      aOutBuffer += outFramesResampled;
+      totalOutFramesNeeded -= outFramesResampled;
+      mInputTail[aChannelIndex].StoreTail<T>(aInBuffer, inFrames);
+      return inFrames;
     };
 
-    resample();
+    mInternalInBuffer[aChannelIndex].ReadNoCopy(
+        [&](const Span<const T>& aInBuffer) -> uint32_t {
+          if (!totalOutFramesNeeded) {
+            return 0;
+          }
+          return resample(aInBuffer.Elements(), aInBuffer.Length());
+        });
 
     if (totalOutFramesNeeded == 0) {
       return false;
@@ -204,8 +201,7 @@ class DynamicResampler final {
           ((CheckedUint32(totalOutFramesNeeded) * mInRate + mOutRate - 1) /
            mOutRate)
               .value();
-      mInternalInBuffer[aChannelIndex].WriteSilence(totalInFramesNeeded);
-      resample();
+      resample(nullptr, totalInFramesNeeded);
     }
     mIsPreBufferSet = false;
     return true;
@@ -219,33 +215,14 @@ class DynamicResampler final {
     MOZ_ASSERT(mChannels);
     MOZ_ASSERT(aChannelIndex < mChannels);
     MOZ_ASSERT(aChannelIndex < mInternalInBuffer.Length());
-    EnsureInputBufferDuration(media::TimeUnit(
-        CheckedInt64(mInternalInBuffer[aChannelIndex].AvailableRead()) +
-            aInFrames,
-        mInRate));
+    EnsureInputBufferSizeInFrames(
+        mInternalInBuffer[aChannelIndex].AvailableRead() + aInFrames);
     mInternalInBuffer[aChannelIndex].Write(Span(aInBuffer, aInFrames));
   }
 
   void WarmUpResampler(bool aSkipLatency);
 
-  media::TimeUnit CalculateInputBufferDuration() const {
-    // Pre-allocate something big, twice the pre-buffer, or at least 100ms.
-    return std::max(mPreBufferDuration * 2, media::TimeUnit::FromSeconds(0.1));
-  }
-
-  bool EnsureInputBufferDuration(media::TimeUnit aDuration) {
-    if (aDuration <= mSetBufferDuration) {
-      // Buffer size is sufficient.
-      return true;
-    }
-
-    // 5 second cap.
-    const media::TimeUnit cap = media::TimeUnit::FromSeconds(5);
-    if (mSetBufferDuration == cap) {
-      // Already at the cap.
-      return false;
-    }
-
+  bool EnsureInputBufferSizeInFrames(uint32_t aSizeInFrames) {
     uint32_t sampleSize = 0;
     if (mSampleFormat == AUDIO_FORMAT_FLOAT32) {
       sampleSize = sizeof(float);
@@ -258,53 +235,62 @@ class DynamicResampler final {
       return true;
     }
 
+    uint32_t sizeInFrames = InFramesBufferSize();
+    if (aSizeInFrames <= sizeInFrames) {
+      // Buffer size is sufficient.
+      return true;  // no reallocation necessary
+    }
+
+    // 5 second cap.
+    const uint32_t cap = 5 * mInRate;
+    if (sizeInFrames >= cap) {
+      // Already at the cap.
+      return false;
+    }
+
     // As a backoff strategy, at least double the previous size.
-    media::TimeUnit duration = mSetBufferDuration * 2;
+    sizeInFrames *= 2;
 
-    if (aDuration > duration) {
+    if (aSizeInFrames > sizeInFrames) {
       // A larger buffer than the normal backoff strategy provides is needed, or
-      // this is the first time setting the buffer size. Round up to the nearest
-      // 100ms, some jitter is expected.
-      duration = aDuration.ToBase<media::TimeUnit::CeilingPolicy>(10);
+      // this is the first time setting the buffer size. Add another 50ms, as
+      // some jitter is expected.
+      sizeInFrames = aSizeInFrames + mInRate / 20;
     }
 
-    duration = std::min(cap, duration);
+    // mInputPreBufferFrameCount is an indication of the desired average
+    // buffering.  Provide for at least twice this.
+    sizeInFrames = std::max(sizeInFrames, mInputPreBufferFrameCount * 2);
+
+    sizeInFrames = std::min(cap, sizeInFrames);
 
     bool success = true;
     for (auto& b : mInternalInBuffer) {
-      success = success &&
-                b.SetLengthBytes(sampleSize * duration.ToTicksAtRate(mInRate));
+      success = success && b.EnsureLengthBytes(sampleSize * sizeInFrames);
     }
 
     if (success) {
       // All buffers have the new size.
-      mSetBufferDuration = duration;
       return true;
     }
 
-    const uint32_t sizeInFrames =
-        static_cast<uint32_t>(mSetBufferDuration.ToTicksAtRate(mInRate));
     // Allocating an input buffer failed. We stick with the old buffer size.
     NS_WARNING(nsPrintfCString("Failed to allocate a buffer of %u bytes (%u "
                                "frames). Expect glitches.",
                                sampleSize * sizeInFrames, sizeInFrames)
                    .get());
-    for (auto& b : mInternalInBuffer) {
-      MOZ_ALWAYS_TRUE(b.SetLengthBytes(sampleSize * sizeInFrames));
-    }
     return false;
   }
 
  public:
-  const uint32_t mInRate;
+  const uint32_t mOutRate;
 
  private:
   bool mIsPreBufferSet = false;
   bool mIsWarmingUp = false;
-  media::TimeUnit mPreBufferDuration;
-  media::TimeUnit mSetBufferDuration = media::TimeUnit::Zero();
+  uint32_t mInputPreBufferFrameCount;
   uint32_t mChannels = 0;
-  uint32_t mOutRate;
+  uint32_t mInRate;
 
   AutoTArray<AudioRingBuffer, STEREO> mInternalInBuffer;
 
@@ -324,16 +310,16 @@ class DynamicResampler final {
     }
     template <typename T>
     void StoreTail(const T* aInBuffer, uint32_t aInFrames) {
-      if (aInFrames >= MAXSIZE) {
-        PodCopy(Buffer<T>(), aInBuffer + aInFrames - MAXSIZE, MAXSIZE);
-        mSize = MAXSIZE;
+      const T* inBuffer = aInBuffer;
+      mSize = std::min(aInFrames, MAXSIZE);
+      if (inBuffer) {
+        PodCopy(Buffer<T>(), inBuffer + aInFrames - mSize, mSize);
       } else {
-        PodCopy(Buffer<T>(), aInBuffer, aInFrames);
-        mSize = aInFrames;
+        std::fill_n(Buffer<T>(), mSize, static_cast<T>(0));
       }
     }
     uint32_t Length() { return mSize; }
-    static const uint32_t MAXSIZE = 20;
+    static constexpr uint32_t MAXSIZE = 20;
 
    private:
     float mBuffer[MAXSIZE] = {};
diff --git a/dom/media/driftcontrol/gtest/TestAudioDriftCorrection.cpp b/dom/media/driftcontrol/gtest/TestAudioDriftCorrection.cpp
index c13f443d37..9d3f0f091a 100644
--- a/dom/media/driftcontrol/gtest/TestAudioDriftCorrection.cpp
+++ b/dom/media/driftcontrol/gtest/TestAudioDriftCorrection.cpp
@@ -260,10 +260,10 @@ TEST(TestAudioDriftCorrection, LargerTransmitterBlockSizeThanDesiredBuffering)
 
   // Input is stable so no corrections should occur.
   EXPECT_EQ(ad.NumCorrectionChanges(), 0U);
-  // The drift correction buffer size had to be larger than the desired (the
-  // buffer size is twice the initial buffering level), to accomodate the large
-  // input block size.
-  EXPECT_EQ(ad.BufferSize(), 9600U);
+  // The desired buffering and pre-buffering level was
+  // transmitterBlockSize * 11 / 10 to accomodate the large input block size.
+  // The buffer size was twice the pre-buffering level.
+  EXPECT_EQ(ad.BufferSize(), transmitterBlockSize * 11 / 10 * 2);
 }
 
 TEST(TestAudioDriftCorrection, LargerReceiverBlockSizeThanDesiredBuffering)
@@ -275,9 +275,9 @@ TEST(TestAudioDriftCorrection, LargerReceiverBlockSizeThanDesiredBuffering)
       MakePrincipalHandle(nsContentUtils::GetSystemPrincipal());
   AudioDriftCorrection ad(sampleRate, sampleRate, testPrincipal);
 
+  AudioSegment inSegment;
   for (uint32_t i = 0; i < (sampleRate / 1000) * 500;
        i += transmitterBlockSize) {
-    AudioSegment inSegment;
     AudioChunk chunk =
         CreateAudioChunk<float>(transmitterBlockSize, 1, AUDIO_FORMAT_FLOAT32);
     inSegment.AppendAndConsumeChunk(std::move(chunk));
@@ -285,6 +285,7 @@ TEST(TestAudioDriftCorrection, LargerReceiverBlockSizeThanDesiredBuffering)
     if (i % receiverBlockSize == 0) {
       AudioSegment outSegment = ad.RequestFrames(inSegment, receiverBlockSize);
       EXPECT_EQ(outSegment.GetDuration(), receiverBlockSize);
+      inSegment.Clear();
     }
 
     if (i >= receiverBlockSize) {
@@ -294,11 +295,12 @@ TEST(TestAudioDriftCorrection, LargerReceiverBlockSizeThanDesiredBuffering)
 
   // Input is stable so no corrections should occur.
   EXPECT_EQ(ad.NumCorrectionChanges(), 0U);
+  EXPECT_EQ(ad.NumUnderruns(), 0U);
   // The drift correction buffer size had to be larger than the desired (the
   // buffer size is twice the initial buffering level), to accomodate the large
   // input block size that gets buffered in the resampler only when processing
   // output.
-  EXPECT_EQ(ad.BufferSize(), 19200U);
+  EXPECT_EQ(ad.BufferSize(), 9600U);
 }
 
 TEST(TestAudioDriftCorrection, DynamicInputBufferSizeChanges)
@@ -329,9 +331,9 @@ TEST(TestAudioDriftCorrection, DynamicInputBufferSizeChanges)
       if (((receivedFramesStart - transmittedFramesStart + i) /
            aTransmitterBlockSize) > numBlocksTransmitted) {
         tone.Generate(inSegment, aTransmitterBlockSize);
-        MOZ_ASSERT(!inSegment.IsNull());
+        MOZ_RELEASE_ASSERT(!inSegment.IsNull());
         inToneVerifier.AppendData(inSegment);
-        MOZ_ASSERT(!inSegment.IsNull());
+        MOZ_RELEASE_ASSERT(!inSegment.IsNull());
         ++numBlocksTransmitted;
         totalFramesTransmitted += aTransmitterBlockSize;
       }
@@ -459,29 +461,50 @@ TEST(TestAudioDriftCorrection, DriftStepResponseUnderrunHighLatencyInput)
   constexpr uint32_t iterations = 200;
   const PrincipalHandle testPrincipal =
       MakePrincipalHandle(nsContentUtils::GetSystemPrincipal());
-  uint32_t inputRate = nominalRate * 1005 / 1000;  // 0.5% drift
-  uint32_t inputInterval = inputRate;
+  uint32_t inputRate1 = nominalRate * 1005 / 1000;  // 0.5% drift
+  uint32_t inputInterval1 = inputRate1;
   AudioGenerator<AudioDataValue> tone(1, nominalRate, 440);
   AudioDriftCorrection ad(nominalRate, nominalRate, testPrincipal);
   for (uint32_t i = 0; i < interval * iterations; i += interval / 100) {
     AudioSegment inSegment;
     if (i > 0 && i % interval == 0) {
-      tone.Generate(inSegment, inputInterval);
+      tone.Generate(inSegment, inputInterval1);
     }
     ad.RequestFrames(inSegment, interval / 100);
   }
 
-  inputRate = nominalRate * 995 / 1000;  // -0.5% drift
-  inputInterval = inputRate;
+  uint32_t inputRate2 = nominalRate * 995 / 1000;  // -0.5% drift
+  uint32_t inputInterval2 = inputRate2;
   for (uint32_t i = 0; i < interval * iterations; i += interval / 100) {
     AudioSegment inSegment;
+    // The first segment is skipped to cause an underrun.
     if (i > 0 && i % interval == 0) {
-      tone.Generate(inSegment, inputInterval);
+      tone.Generate(inSegment, inputInterval2);
     }
     ad.RequestFrames(inSegment, interval / 100);
+    if (i >= interval / 10 && i < interval) {
+      // While the DynamicResampler has not set its pre-buffer after the
+      // underrun, InFramesBuffered() reports the pre-buffer size.
+      // The initial desired buffer and pre-buffer size was
+      // inputInterval1 * 11 / 10 to accomodate the large input block size.
+      // This was doubled when the underrun occurred.
+      EXPECT_EQ(ad.CurrentBuffering(), inputInterval1 * 11 / 10 * 2)
+          << "for i=" << i;
+    } else if (i == interval) {
+      // After the pre-buffer was set and used to generate the first output
+      // block, the actual number of frames buffered almost matches the
+      // pre-buffer size, with some rounding from output to input frame count
+      // conversion.
+      EXPECT_EQ(ad.CurrentBuffering(), inputInterval1 * 11 / 10 * 2 - 1)
+          << "after first input after underrun";
+    }
   }
 
-  EXPECT_EQ(ad.BufferSize(), 220800U);
+  // The initial desired buffering and pre-buffering level was
+  // inputInterval1 * 11 / 10 to accomodate the large input block size.
+  // The buffer size was initially twice the pre-buffering level, and then
+  // doubled when the underrun occurred.
+  EXPECT_EQ(ad.BufferSize(), inputInterval1 * 11 / 10 * 2 * 2);
   EXPECT_EQ(ad.NumUnderruns(), 1u);
 }
 
@@ -511,7 +534,7 @@ TEST(TestAudioDriftCorrection, DriftStepResponseOverrun)
     ad.RequestFrames(inSegment, interval / 100);
   }
 
-  // Change input callbacks to 2000ms (+0.5% drift) = 48200 frames, which will
+  // Change input callbacks to 1000ms (+0.5% drift) = 48200 frames, which will
   // overrun the ring buffer.
   for (uint32_t i = 0; i < interval * iterations; i += interval / 100) {
     AudioSegment inSegment;
@@ -524,6 +547,9 @@ TEST(TestAudioDriftCorrection, DriftStepResponseOverrun)
     ad.RequestFrames(inSegment, interval / 100);
   }
 
-  EXPECT_EQ(ad.BufferSize(), 105600U);
+  // The desired buffering and pre-buffering levels were increased to
+  // inputInterval * 11 / 10 to accomodate the large input block size.
+  // The buffer size was increased to twice the pre-buffering level.
+  EXPECT_EQ(ad.BufferSize(), inputInterval * 11 / 10 * 2);
   EXPECT_EQ(ad.NumUnderruns(), 1u);
 }
diff --git a/dom/media/driftcontrol/gtest/TestAudioResampler.cpp b/dom/media/driftcontrol/gtest/TestAudioResampler.cpp
index f04bc87314..7122b60a1a 100644
--- a/dom/media/driftcontrol/gtest/TestAudioResampler.cpp
+++ b/dom/media/driftcontrol/gtest/TestAudioResampler.cpp
@@ -64,8 +64,7 @@ TEST(TestAudioResampler, OutAudioSegment_Float)
 
   uint32_t pre_buffer = 21;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioSegment inSegment =
       CreateAudioSegment<float>(in_frames, channels, AUDIO_FORMAT_FLOAT32);
@@ -91,9 +90,9 @@ TEST(TestAudioResampler, OutAudioSegment_Float)
     }
   }
 
-  // Update out rate
-  out_rate = 44100;
-  dr.UpdateOutRate(out_rate);
+  // Update in rate
+  in_rate = 26122;
+  dr.UpdateInRate(in_rate);
   out_frames = in_frames * out_rate / in_rate;
   EXPECT_EQ(out_frames, 18u);
   // Even if we provide no input if we have enough buffered input, we can create
@@ -121,8 +120,7 @@ TEST(TestAudioResampler, OutAudioSegment_Short)
 
   uint32_t pre_buffer = 21;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioSegment inSegment =
       CreateAudioSegment<short>(in_frames, channels, AUDIO_FORMAT_S16);
@@ -148,9 +146,9 @@ TEST(TestAudioResampler, OutAudioSegment_Short)
     }
   }
 
-  // Update out rate
-  out_rate = 44100;
-  dr.UpdateOutRate(out_rate);
+  // Update in rate
+  in_rate = 26122;
+  dr.UpdateInRate(out_rate);
   out_frames = in_frames * out_rate / in_rate;
   EXPECT_EQ(out_frames, 18u);
   // Even if we provide no input if we have enough buffered input, we can create
@@ -175,8 +173,7 @@ TEST(TestAudioResampler, OutAudioSegmentLargerThanResampledInput_Float)
 
   uint32_t pre_buffer = 5;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    PRINCIPAL_HANDLE_NONE);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, PRINCIPAL_HANDLE_NONE);
 
   AudioSegment inSegment =
       CreateAudioSegment<float>(in_frames, channels, AUDIO_FORMAT_FLOAT32);
@@ -209,8 +206,7 @@ TEST(TestAudioResampler, InAudioSegment_Float)
   uint32_t out_rate = 48000;
 
   uint32_t pre_buffer = 10;
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioSegment inSegment;
 
@@ -275,8 +271,7 @@ TEST(TestAudioResampler, InAudioSegment_Short)
   uint32_t out_rate = 48000;
 
   uint32_t pre_buffer = 10;
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioSegment inSegment;
 
@@ -342,8 +337,7 @@ TEST(TestAudioResampler, ChannelChange_MonoToStereo)
 
   uint32_t pre_buffer = 0;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioChunk monoChunk =
       CreateAudioChunk<float>(in_frames, 1, AUDIO_FORMAT_FLOAT32);
@@ -378,8 +372,7 @@ TEST(TestAudioResampler, ChannelChange_StereoToMono)
 
   uint32_t pre_buffer = 0;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioChunk monoChunk =
       CreateAudioChunk<float>(in_frames, 1, AUDIO_FORMAT_FLOAT32);
@@ -414,8 +407,7 @@ TEST(TestAudioResampler, ChannelChange_StereoToQuad)
 
   uint32_t pre_buffer = 0;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, pre_buffer, testPrincipal);
 
   AudioChunk stereoChunk =
       CreateAudioChunk<float>(in_frames, 2, AUDIO_FORMAT_FLOAT32);
@@ -452,7 +444,7 @@ TEST(TestAudioResampler, ChannelChange_QuadToStereo)
   uint32_t in_rate = 24000;
   uint32_t out_rate = 48000;
 
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit::Zero(), testPrincipal);
+  AudioResampler dr(in_rate, out_rate, 0, testPrincipal);
 
   AudioChunk stereoChunk =
       CreateAudioChunk<float>(in_frames, 2, AUDIO_FORMAT_FLOAT32);
@@ -497,7 +489,7 @@ TEST(TestAudioResampler, ChannelChange_Discontinuity)
 
   uint32_t in_frames = in_rate / 100;
   uint32_t out_frames = out_rate / 100;
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit::Zero(), testPrincipal);
+  AudioResampler dr(in_rate, out_rate, 0, testPrincipal);
 
   AudioChunk monoChunk =
       CreateAudioChunk<float>(in_frames, 1, AUDIO_FORMAT_FLOAT32);
@@ -560,8 +552,7 @@ TEST(TestAudioResampler, ChannelChange_Discontinuity2)
 
   uint32_t in_frames = in_rate / 100;
   uint32_t out_frames = out_rate / 100;
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(10, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, 10, testPrincipal);
 
   AudioChunk monoChunk =
       CreateAudioChunk<float>(in_frames / 2, 1, AUDIO_FORMAT_FLOAT32);
@@ -630,8 +621,7 @@ TEST(TestAudioResampler, ChannelChange_Discontinuity3)
 
   uint32_t in_frames = in_rate / 100;
   uint32_t out_frames = out_rate / 100;
-  AudioResampler dr(in_rate, out_rate, media::TimeUnit(10, in_rate),
-                    testPrincipal);
+  AudioResampler dr(in_rate, out_rate, 10, testPrincipal);
 
   AudioChunk stereoChunk =
       CreateAudioChunk<float>(in_frames, 2, AUDIO_FORMAT_FLOAT32);
@@ -660,9 +650,9 @@ TEST(TestAudioResampler, ChannelChange_Discontinuity3)
 
   // The resampler here is updated due to the rate change. This is because the
   // in and out rate was the same so a pass through logic was used. By updating
-  // the out rate to something different than the in rate, the resampler will
+  // the in rate to something different than the out rate, the resampler will
   // start being used and discontinuity will exist.
-  dr.UpdateOutRate(out_rate + 400);
+  dr.UpdateInRate(in_rate - 400);
   dr.AppendInput(inSegment);
   AudioSegment s2 = dr.Resample(out_frames, &hasUnderrun);
   EXPECT_FALSE(hasUnderrun);
diff --git a/dom/media/driftcontrol/gtest/TestDriftController.cpp b/dom/media/driftcontrol/gtest/TestDriftController.cpp
index 33486f945f..132577e44a 100644
--- a/dom/media/driftcontrol/gtest/TestDriftController.cpp
+++ b/dom/media/driftcontrol/gtest/TestDriftController.cpp
@@ -18,50 +18,50 @@ TEST(TestDriftController, Basic)
   constexpr uint32_t bufferedHigh = 7 * 480;
 
   DriftController c(48000, 48000, media::TimeUnit::FromSeconds(0.05));
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000U);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000U);
 
   // The adjustment interval is 1s.
   const auto oneSec = media::TimeUnit(48000, 48000);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48048u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 47952u);
 
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 47952u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48048u);
 }
 
 TEST(TestDriftController, BasicResampler)
 {
   // The buffer level is the only input to the controller logic.
-  constexpr uint32_t buffered = 5 * 240;
-  constexpr uint32_t bufferedLow = 3 * 240;
-  constexpr uint32_t bufferedHigh = 7 * 240;
+  constexpr uint32_t buffered = 5 * 480;
+  constexpr uint32_t bufferedLow = 3 * 480;
+  constexpr uint32_t bufferedHigh = 7 * 480;
 
-  DriftController c(24000, 48000, media::TimeUnit::FromSeconds(0.05));
+  DriftController c(48000, 24000, media::TimeUnit::FromSeconds(0.05));
 
   // The adjustment interval is 1s.
   const auto oneSec = media::TimeUnit(48000, 48000);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // low
   c.UpdateClock(oneSec, oneSec, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48048u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 47952u);
 
   // high
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // high
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 47964u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48048u);
 }
 
 TEST(TestDriftController, BufferedInput)
@@ -72,56 +72,56 @@ TEST(TestDriftController, BufferedInput)
   constexpr uint32_t bufferedHigh = 7 * 480;
 
   DriftController c(48000, 48000, media::TimeUnit::FromSeconds(0.05));
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // The adjustment interval is 1s.
   const auto oneSec = media::TimeUnit(48000, 48000);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // 0 buffered when updating correction
   c.UpdateClock(oneSec, oneSec, 0, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48048u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 47952u);
 
   c.UpdateClock(oneSec, oneSec, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 47952u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48048u);
 }
 
 TEST(TestDriftController, BufferedInputWithResampling)
 {
   // The buffer level is the only input to the controller logic.
-  constexpr uint32_t buffered = 5 * 240;
-  constexpr uint32_t bufferedLow = 3 * 240;
-  constexpr uint32_t bufferedHigh = 7 * 240;
+  constexpr uint32_t buffered = 5 * 480;
+  constexpr uint32_t bufferedLow = 3 * 480;
+  constexpr uint32_t bufferedHigh = 7 * 480;
 
-  DriftController c(24000, 48000, media::TimeUnit::FromSeconds(0.05));
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  DriftController c(48000, 24000, media::TimeUnit::FromSeconds(0.05));
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // The adjustment interval is 1s.
   const auto oneSec = media::TimeUnit(24000, 24000);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // 0 buffered when updating correction
   c.UpdateClock(oneSec, oneSec, 0, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48048u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 47952u);
 
   c.UpdateClock(oneSec, oneSec, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 47952u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48048u);
 }
 
 TEST(TestDriftController, SmallError)
@@ -132,21 +132,21 @@ TEST(TestDriftController, SmallError)
   constexpr uint32_t bufferedHigh = buffered + 48;
 
   DriftController c(48000, 48000, media::TimeUnit::FromSeconds(0.05));
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   // The adjustment interval is 1s.
   const auto oneSec = media::TimeUnit(48000, 48000);
 
   c.UpdateClock(oneSec, oneSec, buffered, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
   c.UpdateClock(oneSec, oneSec, bufferedHigh, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000u);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000u);
 }
 
 TEST(TestDriftController, SmallBufferedFrames)
@@ -158,11 +158,34 @@ TEST(TestDriftController, SmallBufferedFrames)
   media::TimeUnit oneSec = media::TimeUnit::FromSeconds(1);
   media::TimeUnit hundredMillis = oneSec / 10;
 
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000U);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000U);
   for (uint32_t i = 0; i < 9; ++i) {
     c.UpdateClock(hundredMillis, hundredMillis, bufferedLow, 0);
   }
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48000U);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 48000U);
   c.UpdateClock(hundredMillis, hundredMillis, bufferedLow, 0);
-  EXPECT_EQ(c.GetCorrectedTargetRate(), 48048U);
+  EXPECT_EQ(c.GetCorrectedSourceRate(), 47952U);
+}
+
+TEST(TestDriftController, VerySmallBufferedFrames)
+{
+  // The buffer level is the only input to the controller logic.
+  uint32_t bufferedLow = 1;
+  uint32_t nominalRate = 48000;
+
+  DriftController c(nominalRate, nominalRate, media::TimeUnit::FromSeconds(1));
+  media::TimeUnit oneSec = media::TimeUnit::FromSeconds(1);
+  media::TimeUnit sourceDuration(1, nominalRate);
+
+  EXPECT_EQ(c.GetCorrectedSourceRate(), nominalRate);
+  uint32_t previousCorrected = nominalRate;
+  // Steps are limited to nominalRate/1000.
+  // Perform 1001 steps to check the corrected rate does not underflow zero.
+  for (uint32_t i = 0; i < 1001; ++i) {
+    c.UpdateClock(sourceDuration, oneSec, bufferedLow, 0);
+    uint32_t correctedRate = c.GetCorrectedSourceRate();
+    EXPECT_LE(correctedRate, previousCorrected) << "for i=" << i;
+    EXPECT_GT(correctedRate, 0u) << "for i=" << i;
+    previousCorrected = correctedRate;
+  }
 }
diff --git a/dom/media/driftcontrol/gtest/TestDynamicResampler.cpp b/dom/media/driftcontrol/gtest/TestDynamicResampler.cpp
index fb8ac52ae4..539dfbfbea 100644
--- a/dom/media/driftcontrol/gtest/TestDynamicResampler.cpp
+++ b/dom/media/driftcontrol/gtest/TestDynamicResampler.cpp
@@ -19,7 +19,7 @@ TEST(TestDynamicResampler, SameRates_Float1)
 
   DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
 
   // float in_ch1[] = {.1, .2, .3, .4, .5, .6, .7, .8, .9, 1.0};
@@ -76,7 +76,7 @@ TEST(TestDynamicResampler, SameRates_Short1)
 
   DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_S16);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
 
   short in_ch1[] = {1, 2, 3};
@@ -298,9 +298,9 @@ TEST(TestDynamicResampler, UpdateOutRate_Float)
 
   uint32_t pre_buffer = 20;
 
-  DynamicResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate));
+  DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
 
   float in_ch1[10] = {};
@@ -329,10 +329,10 @@ TEST(TestDynamicResampler, UpdateOutRate_Float)
     EXPECT_FLOAT_EQ(out_ch2[i], 0.0);
   }
 
-  // Update out rate
-  out_rate = 44100;
-  dr.UpdateResampler(out_rate, channels);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  // Update in rate
+  in_rate = 26122;
+  dr.UpdateResampler(in_rate, channels);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
   out_frames = in_frames * out_rate / in_rate;
   EXPECT_EQ(out_frames, 18u);
@@ -354,9 +354,9 @@ TEST(TestDynamicResampler, UpdateOutRate_Short)
 
   uint32_t pre_buffer = 20;
 
-  DynamicResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate));
+  DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_S16);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
 
   short in_ch1[10] = {};
@@ -385,10 +385,10 @@ TEST(TestDynamicResampler, UpdateOutRate_Short)
     EXPECT_EQ(out_ch2[i], 0.0);
   }
 
-  // Update out rate
-  out_rate = 44100;
-  dr.UpdateResampler(out_rate, channels);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  // Update in rate
+  in_rate = 26122;
+  dr.UpdateResampler(in_rate, channels);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
   out_frames = in_frames * out_rate / in_rate;
   EXPECT_EQ(out_frames, 18u);
@@ -400,16 +400,15 @@ TEST(TestDynamicResampler, UpdateOutRate_Short)
   EXPECT_FALSE(hasUnderrun);
 }
 
-TEST(TestDynamicResampler, BigRangeOutRates_Float)
+TEST(TestDynamicResampler, BigRangeInRates_Float)
 {
   uint32_t in_frames = 10;
   uint32_t out_frames = 10;
   uint32_t channels = 2;
   uint32_t in_rate = 44100;
   uint32_t out_rate = 44100;
-  uint32_t pre_buffer = 20;
 
-  DynamicResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate));
+  DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
 
   const uint32_t in_capacity = 40;
@@ -427,10 +426,14 @@ TEST(TestDynamicResampler, BigRangeOutRates_Float)
   float out_ch1[out_capacity] = {};
   float out_ch2[out_capacity] = {};
 
-  for (uint32_t rate = 10000; rate < 90000; ++rate) {
-    out_rate = rate;
-    dr.UpdateResampler(out_rate, channels);
-    EXPECT_EQ(dr.GetOutRate(), out_rate);
+  // Downsampling at a high enough ratio happens to have enough excess
+  // in_frames from rounding in the out_frames calculation to cover the
+  // skipped input latency when switching from zero-latency 44100->44100 to a
+  // non-1:1 ratio.
+  for (uint32_t rate = 100000; rate >= 10000; rate -= 2) {
+    in_rate = rate;
+    dr.UpdateResampler(in_rate, channels);
+    EXPECT_EQ(dr.GetInRate(), in_rate);
     EXPECT_EQ(dr.GetChannels(), channels);
     in_frames = 20;  // more than we need
     out_frames = in_frames * out_rate / in_rate;
@@ -444,16 +447,15 @@ TEST(TestDynamicResampler, BigRangeOutRates_Float)
   }
 }
 
-TEST(TestDynamicResampler, BigRangeOutRates_Short)
+TEST(TestDynamicResampler, BigRangeInRates_Short)
 {
   uint32_t in_frames = 10;
   uint32_t out_frames = 10;
   uint32_t channels = 2;
   uint32_t in_rate = 44100;
   uint32_t out_rate = 44100;
-  uint32_t pre_buffer = 20;
 
-  DynamicResampler dr(in_rate, out_rate, media::TimeUnit(pre_buffer, in_rate));
+  DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_S16);
 
   const uint32_t in_capacity = 40;
@@ -471,9 +473,9 @@ TEST(TestDynamicResampler, BigRangeOutRates_Short)
   short out_ch1[out_capacity] = {};
   short out_ch2[out_capacity] = {};
 
-  for (uint32_t rate = 10000; rate < 90000; ++rate) {
-    out_rate = rate;
-    dr.UpdateResampler(out_rate, channels);
+  for (uint32_t rate = 100000; rate >= 10000; rate -= 2) {
+    in_rate = rate;
+    dr.UpdateResampler(in_rate, channels);
     in_frames = 20;  // more than we need
     out_frames = in_frames * out_rate / in_rate;
     for (uint32_t y = 0; y < 2; ++y) {
@@ -517,8 +519,8 @@ TEST(TestDynamicResampler, UpdateChannels_Float)
   EXPECT_FALSE(hasUnderrun);
 
   // Add 3rd channel
-  dr.UpdateResampler(out_rate, 3);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  dr.UpdateResampler(in_rate, 3);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), 3u);
 
   float in_ch3[10] = {};
@@ -546,8 +548,8 @@ TEST(TestDynamicResampler, UpdateChannels_Float)
   in_buffer[3] = in_ch4;
   float out_ch4[10] = {};
 
-  dr.UpdateResampler(out_rate, 4);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  dr.UpdateResampler(in_rate, 4);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), 4u);
   dr.AppendInput(in_buffer, in_frames);
 
@@ -592,8 +594,8 @@ TEST(TestDynamicResampler, UpdateChannels_Short)
   EXPECT_FALSE(hasUnderrun);
 
   // Add 3rd channel
-  dr.UpdateResampler(out_rate, 3);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  dr.UpdateResampler(in_rate, 3);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), 3u);
 
   short in_ch3[10] = {};
@@ -622,8 +624,8 @@ TEST(TestDynamicResampler, UpdateChannels_Short)
   in_buffer[3] = in_ch4;
   short out_ch4[10] = {};
 
-  dr.UpdateResampler(out_rate, 4);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  dr.UpdateResampler(in_rate, 4);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), 4u);
   dr.AppendInput(in_buffer, in_frames);
 
@@ -647,7 +649,7 @@ TEST(TestDynamicResampler, Underrun)
 
   DynamicResampler dr(in_rate, out_rate);
   dr.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
-  EXPECT_EQ(dr.GetOutRate(), out_rate);
+  EXPECT_EQ(dr.GetInRate(), in_rate);
   EXPECT_EQ(dr.GetChannels(), channels);
 
   float in_ch1[in_frames] = {};
@@ -689,7 +691,7 @@ TEST(TestDynamicResampler, Underrun)
   }
 
   // Now try with resampling.
-  dr.UpdateResampler(out_rate / 2, channels);
+  dr.UpdateResampler(in_rate * 2, channels);
   dr.AppendInput(in_buffer, in_frames);
   hasUnderrun = dr.Resample(out_ch1, out_frames, 0);
   EXPECT_TRUE(hasUnderrun);
diff --git a/dom/media/driftcontrol/plot.py b/dom/media/driftcontrol/plot.py
index d55c0f7de0..c3685ead7c 100755
--- a/dom/media/driftcontrol/plot.py
+++ b/dom/media/driftcontrol/plot.py
@@ -86,23 +86,23 @@ MOZ_LOG_FILE=/tmp/driftcontrol.csv       \
             [d + h for (d, h) in zip(desired, hysteresisthreshold)],
             alpha=0.2,
             color="goldenrod",
-            legend_label="Hysteresis Threshold (won't correct out rate within area)",
+            legend_label="Hysteresis Threshold (won't correct in rate within area)",
         )
 
         fig2 = figure(x_range=fig1.x_range)
         fig2.line(t, inrate, color="hotpink", legend_label="Nominal in sample rate")
         fig2.line(t, outrate, color="firebrick", legend_label="Nominal out sample rate")
         fig2.line(
-            t, corrected, color="dodgerblue", legend_label="Corrected out sample rate"
+            t, corrected, color="dodgerblue", legend_label="Corrected in sample rate"
         )
         fig2.line(
             t,
             hysteresiscorrected,
             color="seagreen",
-            legend_label="Hysteresis-corrected out sample rate",
+            legend_label="Hysteresis-corrected in sample rate",
         )
         fig2.line(
-            t, configured, color="goldenrod", legend_label="Configured out sample rate"
+            t, configured, color="goldenrod", legend_label="Configured in sample rate"
         )
 
         fig3 = figure(x_range=fig1.x_range)
diff --git a/dom/media/encoder/VP8TrackEncoder.cpp b/dom/media/encoder/VP8TrackEncoder.cpp
index 0c7f3de1f4..36680b6552 100644
--- a/dom/media/encoder/VP8TrackEncoder.cpp
+++ b/dom/media/encoder/VP8TrackEncoder.cpp
@@ -9,7 +9,7 @@
 #include <vpx/vpx_encoder.h>
 
 #include "DriftCompensation.h"
-#include "ImageToI420.h"
+#include "ImageConversion.h"
 #include "mozilla/gfx/2D.h"
 #include "prsystem.h"
 #include "VideoSegment.h"
diff --git a/dom/media/gmp/CDMStorageIdProvider.cpp b/dom/media/gmp/CDMStorageIdProvider.cpp
index 52255879b3..9af4580d9e 100644
--- a/dom/media/gmp/CDMStorageIdProvider.cpp
+++ b/dom/media/gmp/CDMStorageIdProvider.cpp
@@ -6,7 +6,7 @@
 #include "CDMStorageIdProvider.h"
 #include "GMPLog.h"
 #include "nsCOMPtr.h"
-#include "nsComponentManagerUtils.h"
+#include "mozilla/IntegerPrintfMacros.h"
 #include "nsICryptoHash.h"
 
 #ifdef SUPPORT_STORAGE_ID
diff --git a/dom/media/gmp/ChromiumCDMChild.h b/dom/media/gmp/ChromiumCDMChild.h
index 1bf153a5d5..fae54bbb5c 100644
--- a/dom/media/gmp/ChromiumCDMChild.h
+++ b/dom/media/gmp/ChromiumCDMChild.h
@@ -125,7 +125,7 @@ class ChromiumCDMChild : public PChromiumCDMChild, public cdm::Host_10 {
   GMPContentChild* mPlugin = nullptr;
   cdm::ContentDecryptionModule_10* mCDM = nullptr;
 
-  typedef SimpleMap<uint64_t> DurationMap;
+  typedef SimpleMap<int64_t, uint64_t, ThreadSafePolicy> DurationMap;
   DurationMap mFrameDurations;
   nsTArray<uint32_t> mLoadSessionPromiseIds;
 
diff --git a/dom/media/gmp/GMPVideoDecoderChild.cpp b/dom/media/gmp/GMPVideoDecoderChild.cpp
index 0f605cca9b..f60952ee51 100644
--- a/dom/media/gmp/GMPVideoDecoderChild.cpp
+++ b/dom/media/gmp/GMPVideoDecoderChild.cpp
@@ -36,12 +36,17 @@ void GMPVideoDecoderChild::Init(GMPVideoDecoder* aDecoder) {
 GMPVideoHostImpl& GMPVideoDecoderChild::Host() { return mVideoHost; }
 
 void GMPVideoDecoderChild::Decoded(GMPVideoi420Frame* aDecodedFrame) {
-  MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
-
   if (!aDecodedFrame) {
     MOZ_CRASH("Not given a decoded frame!");
   }
 
+  if (NS_WARN_IF(!mPlugin)) {
+    aDecodedFrame->Destroy();
+    return;
+  }
+
+  MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
+
   auto df = static_cast<GMPVideoi420FrameImpl*>(aDecodedFrame);
 
   GMPVideoi420FrameData frameData;
@@ -53,36 +58,60 @@ void GMPVideoDecoderChild::Decoded(GMPVideoi420Frame* aDecodedFrame) {
 
 void GMPVideoDecoderChild::ReceivedDecodedReferenceFrame(
     const uint64_t aPictureId) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendReceivedDecodedReferenceFrame(aPictureId);
 }
 
 void GMPVideoDecoderChild::ReceivedDecodedFrame(const uint64_t aPictureId) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendReceivedDecodedFrame(aPictureId);
 }
 
 void GMPVideoDecoderChild::InputDataExhausted() {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendInputDataExhausted();
 }
 
 void GMPVideoDecoderChild::DrainComplete() {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendDrainComplete();
 }
 
 void GMPVideoDecoderChild::ResetComplete() {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendResetComplete();
 }
 
 void GMPVideoDecoderChild::Error(GMPErr aError) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendError(aError);
@@ -121,9 +150,9 @@ mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvDecode(
 
 mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvChildShmemForPool(
     Shmem&& aFrameBuffer) {
-  if (aFrameBuffer.IsWritable()) {
-    mVideoHost.SharedMemMgr()->MgrDeallocShmem(GMPSharedMem::kGMPFrameData,
-                                               aFrameBuffer);
+  GMPSharedMemManager* memMgr = mVideoHost.SharedMemMgr();
+  if (memMgr && aFrameBuffer.IsWritable()) {
+    memMgr->MgrDeallocShmem(GMPSharedMem::kGMPFrameData, aFrameBuffer);
   }
   return IPC_OK();
 }
@@ -153,6 +182,7 @@ mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvDrain() {
 }
 
 mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvDecodingComplete() {
+  MOZ_ASSERT(mPlugin);
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   if (mNeedShmemIntrCount) {
@@ -163,6 +193,13 @@ mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvDecodingComplete() {
     mPendingDecodeComplete = true;
     return IPC_OK();
   }
+
+  // This will call ActorDestroy.
+  Unused << Send__delete__(this);
+  return IPC_OK();
+}
+
+void GMPVideoDecoderChild::ActorDestroy(ActorDestroyReason why) {
   if (mVideoDecoder) {
     // Ignore any return code. It is OK for this to fail without killing the
     // process.
@@ -173,13 +210,13 @@ mozilla::ipc::IPCResult GMPVideoDecoderChild::RecvDecodingComplete() {
   mVideoHost.DoneWithAPI();
 
   mPlugin = nullptr;
-
-  Unused << Send__delete__(this);
-
-  return IPC_OK();
 }
 
 bool GMPVideoDecoderChild::Alloc(size_t aSize, Shmem* aMem) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return false;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   bool rv;
diff --git a/dom/media/gmp/GMPVideoDecoderChild.h b/dom/media/gmp/GMPVideoDecoderChild.h
index 3c74e5f02c..527d6cad44 100644
--- a/dom/media/gmp/GMPVideoDecoderChild.h
+++ b/dom/media/gmp/GMPVideoDecoderChild.h
@@ -59,6 +59,7 @@ class GMPVideoDecoderChild : public PGMPVideoDecoderChild,
   mozilla::ipc::IPCResult RecvReset();
   mozilla::ipc::IPCResult RecvDrain();
   mozilla::ipc::IPCResult RecvDecodingComplete();
+  void ActorDestroy(ActorDestroyReason why) override;
 
   GMPContentChild* mPlugin;
   GMPVideoDecoder* mVideoDecoder;
diff --git a/dom/media/gmp/GMPVideoEncoderChild.cpp b/dom/media/gmp/GMPVideoEncoderChild.cpp
index 19a96b5efe..01a913f920 100644
--- a/dom/media/gmp/GMPVideoEncoderChild.cpp
+++ b/dom/media/gmp/GMPVideoEncoderChild.cpp
@@ -38,6 +38,11 @@ GMPVideoHostImpl& GMPVideoEncoderChild::Host() { return mVideoHost; }
 void GMPVideoEncoderChild::Encoded(GMPVideoEncodedFrame* aEncodedFrame,
                                    const uint8_t* aCodecSpecificInfo,
                                    uint32_t aCodecSpecificInfoLength) {
+  if (NS_WARN_IF(!mPlugin)) {
+    aEncodedFrame->Destroy();
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   auto ef = static_cast<GMPVideoEncodedFrameImpl*>(aEncodedFrame);
@@ -53,6 +58,10 @@ void GMPVideoEncoderChild::Encoded(GMPVideoEncodedFrame* aEncodedFrame,
 }
 
 void GMPVideoEncoderChild::Error(GMPErr aError) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   SendError(aError);
@@ -95,9 +104,9 @@ mozilla::ipc::IPCResult GMPVideoEncoderChild::RecvEncode(
 
 mozilla::ipc::IPCResult GMPVideoEncoderChild::RecvChildShmemForPool(
     Shmem&& aEncodedBuffer) {
-  if (aEncodedBuffer.IsWritable()) {
-    mVideoHost.SharedMemMgr()->MgrDeallocShmem(GMPSharedMem::kGMPEncodedData,
-                                               aEncodedBuffer);
+  GMPSharedMemManager* memMgr = mVideoHost.SharedMemMgr();
+  if (memMgr && aEncodedBuffer.IsWritable()) {
+    memMgr->MgrDeallocShmem(GMPSharedMem::kGMPEncodedData, aEncodedBuffer);
   }
   return IPC_OK();
 }
@@ -142,6 +151,7 @@ mozilla::ipc::IPCResult GMPVideoEncoderChild::RecvSetPeriodicKeyFrames(
 }
 
 mozilla::ipc::IPCResult GMPVideoEncoderChild::RecvEncodingComplete() {
+  MOZ_ASSERT(mPlugin);
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   if (mNeedShmemIntrCount) {
@@ -153,26 +163,29 @@ mozilla::ipc::IPCResult GMPVideoEncoderChild::RecvEncodingComplete() {
     return IPC_OK();
   }
 
-  if (!mVideoEncoder) {
-    // There is not much to clean up anymore.
-    Unused << Send__delete__(this);
-    return IPC_OK();
-  }
+  // This will call ActorDestroy.
+  Unused << Send__delete__(this);
+  return IPC_OK();
+}
 
-  // Ignore any return code. It is OK for this to fail without killing the
-  // process.
-  mVideoEncoder->EncodingComplete();
+void GMPVideoEncoderChild::ActorDestroy(ActorDestroyReason why) {
+  if (mVideoEncoder) {
+    // Ignore any return code. It is OK for this to fail without killing the
+    // process.
+    mVideoEncoder->EncodingComplete();
+    mVideoEncoder = nullptr;
+  }
 
   mVideoHost.DoneWithAPI();
 
   mPlugin = nullptr;
-
-  Unused << Send__delete__(this);
-
-  return IPC_OK();
 }
 
 bool GMPVideoEncoderChild::Alloc(size_t aSize, Shmem* aMem) {
+  if (NS_WARN_IF(!mPlugin)) {
+    return false;
+  }
+
   MOZ_ASSERT(mPlugin->GMPMessageLoop() == MessageLoop::current());
 
   bool rv;
diff --git a/dom/media/gmp/GMPVideoEncoderChild.h b/dom/media/gmp/GMPVideoEncoderChild.h
index dd3c0fdf37..344a55b388 100644
--- a/dom/media/gmp/GMPVideoEncoderChild.h
+++ b/dom/media/gmp/GMPVideoEncoderChild.h
@@ -59,6 +59,7 @@ class GMPVideoEncoderChild : public PGMPVideoEncoderChild,
                                        const uint32_t& aFrameRate);
   mozilla::ipc::IPCResult RecvSetPeriodicKeyFrames(const bool& aEnable);
   mozilla::ipc::IPCResult RecvEncodingComplete();
+  void ActorDestroy(ActorDestroyReason why) override;
 
   GMPContentChild* mPlugin;
   GMPVideoEncoder* mVideoEncoder;
diff --git a/dom/media/gmp/mozIGeckoMediaPluginService.idl b/dom/media/gmp/mozIGeckoMediaPluginService.idl
index 000cfef2f5..a4e3253cba 100644
--- a/dom/media/gmp/mozIGeckoMediaPluginService.idl
+++ b/dom/media/gmp/mozIGeckoMediaPluginService.idl
@@ -57,7 +57,7 @@ native GetGMPVideoEncoderCallback(mozilla::UniquePtr<GetGMPVideoEncoderCallback>
 native GetNodeIdCallback(mozilla::UniquePtr<GetNodeIdCallback>&&);
 native GMPCrashHelperPtr(mozilla::GMPCrashHelper*);
 
-[scriptable, uuid(44d362ae-937a-4803-bee6-f2512a0149d1)]
+[scriptable, builtinclass, uuid(44d362ae-937a-4803-bee6-f2512a0149d1)]
 interface mozIGeckoMediaPluginService : nsISupports
 {
 
diff --git a/dom/media/gtest/AudioVerifier.h b/dom/media/gtest/AudioVerifier.h
index ba67f6e489..2ff8ed9269 100644
--- a/dom/media/gtest/AudioVerifier.h
+++ b/dom/media/gtest/AudioVerifier.h
@@ -99,7 +99,7 @@ class AudioVerifier {
   void CountZeroCrossing(Sample aCurrentSample) {
     if (mPrevious > 0 && aCurrentSample <= 0) {
       if (mZeroCrossCount++) {
-        MOZ_ASSERT(mZeroCrossCount > 1);
+        MOZ_RELEASE_ASSERT(mZeroCrossCount > 1);
         mSumPeriodInSamples += mTotalFramesSoFar - mLastZeroCrossPosition;
       }
       mLastZeroCrossPosition = mTotalFramesSoFar;
@@ -120,7 +120,7 @@ class AudioVerifier {
       return;
     }
 
-    MOZ_ASSERT(mCurrentDiscontinuityFrameCount == 0);
+    MOZ_RELEASE_ASSERT(mCurrentDiscontinuityFrameCount == 0);
     if (!discontinuity) {
       return;
     }
diff --git a/dom/media/gtest/GMPTestMonitor.h b/dom/media/gtest/GMPTestMonitor.h
index 27477b6a42..9f4e8f0a84 100644
--- a/dom/media/gtest/GMPTestMonitor.h
+++ b/dom/media/gtest/GMPTestMonitor.h
@@ -15,7 +15,7 @@ class GMPTestMonitor {
   GMPTestMonitor() : mFinished(false) {}
 
   void AwaitFinished() {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     mozilla::SpinEventLoopUntil("GMPTestMonitor::AwaitFinished"_ns,
                                 [&]() { return mFinished; });
     mFinished = false;
@@ -23,7 +23,7 @@ class GMPTestMonitor {
 
  private:
   void MarkFinished() {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     mFinished = true;
   }
 
diff --git a/dom/media/gtest/MockCubeb.cpp b/dom/media/gtest/MockCubeb.cpp
index ae3a676ac8..9d61ccf4b5 100644
--- a/dom/media/gtest/MockCubeb.cpp
+++ b/dom/media/gtest/MockCubeb.cpp
@@ -168,79 +168,93 @@ MockCubebStream::MockCubebStream(
       mAudioVerifier(aInputStreamParams ? aInputStreamParams->rate
                                         : aOutputStreamParams->rate,
                      100 /* aFrequency */) {
-  MOZ_ASSERT(mAudioGenerator.ChannelCount() <= MAX_INPUT_CHANNELS,
-             "mInputBuffer has no enough space to hold generated data");
-  MOZ_ASSERT_IF(mFrozenStart, mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mAudioGenerator.ChannelCount() <= MAX_INPUT_CHANNELS,
+                     "mInputBuffer has no enough space to hold generated data");
+  if (mFrozenStart) {
+    MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
+  }
   if (aInputStreamParams) {
     mInputParams = *aInputStreamParams;
   }
   if (aOutputStreamParams) {
     mOutputParams = *aOutputStreamParams;
-    MOZ_ASSERT(SampleRate() == mOutputParams.rate);
+    MOZ_RELEASE_ASSERT(SampleRate() == mOutputParams.rate);
   }
 }
 
 MockCubebStream::~MockCubebStream() = default;
 
 int MockCubebStream::Start() {
-  NotifyState(CUBEB_STATE_STARTED);
-  mStreamStop = false;
-  if (mFrozenStart) {
-    // We need to grab mFrozenStartMonitor before returning to avoid races in
-    // the calling code -- it controls when to mFrozenStartMonitor.Notify().
-    // TempData helps facilitate this by holding what's needed to block the
-    // calling thread until the background thread has grabbed the lock.
-    struct TempData {
-      NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TempData)
-      static_assert(HasThreadSafeRefCnt::value,
-                    "Silence a -Wunused-local-typedef warning");
-      Monitor mMonitor{"MockCubebStream::Start::TempData::mMonitor"};
-      bool mFinished = false;
-
-     private:
-      ~TempData() = default;
-    };
-    auto temp = MakeRefPtr<TempData>();
-    MonitorAutoLock lock(temp->mMonitor);
-    NS_DispatchBackgroundTask(NS_NewRunnableFunction(
-        "MockCubebStream::WaitForThawBeforeStart",
-        [temp, this, self = RefPtr<SmartMockCubebStream>(mSelf)]() mutable {
-          MonitorAutoLock lock(mFrozenStartMonitor);
-          {
-            // Unblock MockCubebStream::Start now that we have locked the frozen
-            // start monitor.
-            MonitorAutoLock tempLock(temp->mMonitor);
-            temp->mFinished = true;
-            temp->mMonitor.Notify();
-            temp = nullptr;
-          }
-          while (mFrozenStart) {
-            mFrozenStartMonitor.Wait();
-          }
-          if (!mStreamStop) {
+  {
+    MutexAutoLock l(mMutex);
+    NotifyState(CUBEB_STATE_STARTED);
+  }
+  {
+    MonitorAutoLock lock(mFrozenStartMonitor);
+    if (mFrozenStart) {
+      // We need to grab mFrozenStartMonitor before returning to avoid races in
+      // the calling code -- it controls when to mFrozenStartMonitor.Notify().
+      // TempData helps facilitate this by holding what's needed to block the
+      // calling thread until the background thread has grabbed the lock.
+      struct TempData {
+        NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TempData)
+        static_assert(HasThreadSafeRefCnt::value,
+                      "Silence a -Wunused-local-typedef warning");
+        Monitor mMonitor{"MockCubebStream::Start::TempData::mMonitor"};
+        bool mFinished = false;
+
+       private:
+        ~TempData() = default;
+      };
+      auto temp = MakeRefPtr<TempData>();
+      MonitorAutoLock lock(temp->mMonitor);
+      NS_DispatchBackgroundTask(NS_NewRunnableFunction(
+          "MockCubebStream::WaitForThawBeforeStart",
+          [temp, this, self = RefPtr<SmartMockCubebStream>(mSelf)]() mutable {
+            {
+              // Unblock MockCubebStream::Start now that we have locked the
+              // frozen start monitor.
+              MonitorAutoLock tempLock(temp->mMonitor);
+              temp->mFinished = true;
+              temp->mMonitor.Notify();
+              temp = nullptr;
+            }
+            {
+              MonitorAutoLock lock(mFrozenStartMonitor);
+              while (mFrozenStart) {
+                mFrozenStartMonitor.Wait();
+              }
+            }
+            if (MutexAutoLock l(mMutex);
+                !mState || *mState != CUBEB_STATE_STARTED) {
+              return;
+            }
             MockCubeb::AsMock(context)->StartStream(mSelf);
-          }
-        }));
-    while (!temp->mFinished) {
-      temp->mMonitor.Wait();
+          }));
+      while (!temp->mFinished) {
+        temp->mMonitor.Wait();
+      }
+      return CUBEB_OK;
     }
-    return CUBEB_OK;
   }
   MockCubeb::AsMock(context)->StartStream(this);
   return CUBEB_OK;
 }
 
 int MockCubebStream::Stop() {
+  MockCubeb::AsMock(context)->StopStream(this);
+  MutexAutoLock l(mMutex);
   mOutputVerificationEvent.Notify(std::make_tuple(
       mAudioVerifier.PreSilenceSamples(), mAudioVerifier.EstimatedFreq(),
       mAudioVerifier.CountDiscontinuities()));
-  MockCubeb::AsMock(context)->StopStream(this);
-  mStreamStop = true;
   NotifyState(CUBEB_STATE_STOPPED);
   return CUBEB_OK;
 }
 
-uint64_t MockCubebStream::Position() { return mPosition; }
+uint64_t MockCubebStream::Position() {
+  MutexAutoLock l(mMutex);
+  return mPosition;
+}
 
 void MockCubebStream::Destroy() {
   // Stop() even if cubeb_stream_stop() has already been called, as with
@@ -248,11 +262,15 @@ void MockCubebStream::Destroy() {
   // This provides an extra STOPPED state callback as with audioipc.
   // It also ensures that this stream is removed from MockCubeb::mLiveStreams.
   Stop();
-  mDestroyed = true;
+  {
+    MutexAutoLock l(mMutex);
+    mDestroyed = true;
+  }
   MockCubeb::AsMock(context)->StreamDestroy(this);
 }
 
 int MockCubebStream::SetName(char const* aName) {
+  MutexAutoLock l(mMutex);
   mName = aName;
   mNameSetEvent.Notify(mName);
   return CUBEB_OK;
@@ -260,6 +278,7 @@ int MockCubebStream::SetName(char const* aName) {
 
 int MockCubebStream::RegisterDeviceChangedCallback(
     cubeb_device_changed_callback aDeviceChangedCallback) {
+  MutexAutoLock l(mMutex);
   if (mDeviceChangedCallback && aDeviceChangedCallback) {
     return CUBEB_ERROR_INVALID_PARAMETER;
   }
@@ -267,14 +286,41 @@ int MockCubebStream::RegisterDeviceChangedCallback(
   return CUBEB_OK;
 }
 
+int MockCubebStream::SetInputProcessingParams(
+    cubeb_input_processing_params aParams) {
+  MockCubeb* mock = MockCubeb::AsMock(context);
+  auto res = mock->SupportedInputProcessingParams();
+  if (res.isErr()) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+  cubeb_input_processing_params supported = res.unwrap();
+  if ((supported & aParams) != aParams) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+  return mock->InputProcessingApplyRv();
+}
+
 cubeb_stream* MockCubebStream::AsCubebStream() {
-  MOZ_ASSERT(!mDestroyed);
+  MutexAutoLock l(mMutex);
+  return AsCubebStreamLocked();
+}
+
+cubeb_stream* MockCubebStream::AsCubebStreamLocked() {
+  MOZ_RELEASE_ASSERT(!mDestroyed);
+  mMutex.AssertCurrentThreadOwns();
   return reinterpret_cast<cubeb_stream*>(this);
 }
 
 MockCubebStream* MockCubebStream::AsMock(cubeb_stream* aStream) {
   auto* mockStream = reinterpret_cast<MockCubebStream*>(aStream);
-  MOZ_ASSERT(!mockStream->mDestroyed);
+  MutexAutoLock l(mockStream->mMutex);
+  return AsMockLocked(aStream);
+}
+
+MockCubebStream* MockCubebStream::AsMockLocked(cubeb_stream* aStream) {
+  auto* mockStream = reinterpret_cast<MockCubebStream*>(aStream);
+  mockStream->mMutex.AssertCurrentThreadOwns();
+  MOZ_RELEASE_ASSERT(!mockStream->mDestroyed);
   return mockStream;
 }
 
@@ -285,58 +331,96 @@ cubeb_devid MockCubebStream::GetOutputDeviceID() const {
 }
 
 uint32_t MockCubebStream::InputChannels() const {
+  MutexAutoLock l(mMutex);
+  return InputChannelsLocked();
+}
+
+uint32_t MockCubebStream::InputChannelsLocked() const {
+  mMutex.AssertCurrentThreadOwns();
   return mAudioGenerator.ChannelCount();
 }
 
 uint32_t MockCubebStream::OutputChannels() const {
+  MutexAutoLock l(mMutex);
+  return OutputChannelsLocked();
+}
+
+uint32_t MockCubebStream::OutputChannelsLocked() const {
+  mMutex.AssertCurrentThreadOwns();
   return mOutputParams.channels;
 }
 
 uint32_t MockCubebStream::SampleRate() const {
+  MutexAutoLock l(mMutex);
+  return SampleRateLocked();
+}
+
+uint32_t MockCubebStream::SampleRateLocked() const {
+  mMutex.AssertCurrentThreadOwns();
   return mAudioGenerator.mSampleRate;
 }
 
 uint32_t MockCubebStream::InputFrequency() const {
+  MutexAutoLock l(mMutex);
+  return InputFrequencyLocked();
+}
+
+uint32_t MockCubebStream::InputFrequencyLocked() const {
+  mMutex.AssertCurrentThreadOwns();
   return mAudioGenerator.mFrequency;
 }
 
+Maybe<cubeb_state> MockCubebStream::State() const {
+  MutexAutoLock l(mMutex);
+  return mState;
+}
+
 nsTArray<AudioDataValue>&& MockCubebStream::TakeRecordedOutput() {
+  MutexAutoLock l(mMutex);
   return std::move(mRecordedOutput);
 }
 
 nsTArray<AudioDataValue>&& MockCubebStream::TakeRecordedInput() {
+  MutexAutoLock l(mMutex);
   return std::move(mRecordedInput);
 }
 
 void MockCubebStream::SetDriftFactor(float aDriftFactor) {
-  MOZ_ASSERT(mRunningMode == MockCubeb::RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == MockCubeb::RunningMode::Automatic);
+  MutexAutoLock l(mMutex);
   mDriftFactor = aDriftFactor;
 }
 
-void MockCubebStream::ForceError() { mForceErrorState = true; }
+void MockCubebStream::ForceError() {
+  MutexAutoLock l(mMutex);
+  mForceErrorState = true;
+}
 
 void MockCubebStream::ForceDeviceChanged() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
+  MutexAutoLock l(mMutex);
   mForceDeviceChanged = true;
 };
 
 void MockCubebStream::NotifyDeviceChangedNow() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Manual);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Manual);
   NotifyDeviceChanged();
 }
 
 void MockCubebStream::Thaw() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   MonitorAutoLock l(mFrozenStartMonitor);
   mFrozenStart = false;
   mFrozenStartMonitor.Notify();
 }
 
 void MockCubebStream::SetOutputRecordingEnabled(bool aEnabled) {
+  MutexAutoLock l(mMutex);
   mOutputRecordingEnabled = aEnabled;
 }
 
 void MockCubebStream::SetInputRecordingEnabled(bool aEnabled) {
+  MutexAutoLock l(mMutex);
   mInputRecordingEnabled = aEnabled;
 }
 
@@ -370,33 +454,43 @@ MediaEventSource<void>& MockCubebStream::DeviceChangeForcedEvent() {
 }
 
 KeepProcessing MockCubebStream::ManualDataCallback(long aNrFrames) {
-  MOZ_ASSERT(mRunningMode == RunningMode::Manual);
-  MOZ_ASSERT(aNrFrames <= kMaxNrFrames);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Manual);
+  MOZ_RELEASE_ASSERT(aNrFrames <= kMaxNrFrames);
+  MutexAutoLock l(mMutex);
   return Process(aNrFrames);
 }
 
 KeepProcessing MockCubebStream::Process(long aNrFrames) {
+  mMutex.AssertCurrentThreadOwns();
+  if (!mState || *mState != CUBEB_STATE_STARTED) {
+    return KeepProcessing::InvalidState;
+  }
   if (mInputParams.rate) {
     mAudioGenerator.GenerateInterleaved(mInputBuffer, aNrFrames);
   }
-  cubeb_stream* stream = AsCubebStream();
+  cubeb_stream* stream = AsCubebStreamLocked();
   const long outframes =
       mDataCallback(stream, mUserPtr, mHasInput ? mInputBuffer : nullptr,
                     mHasOutput ? mOutputBuffer : nullptr, aNrFrames);
 
-  if (mInputRecordingEnabled && mHasInput) {
-    mRecordedInput.AppendElements(mInputBuffer, outframes * InputChannels());
-  }
-  if (mOutputRecordingEnabled && mHasOutput) {
-    mRecordedOutput.AppendElements(mOutputBuffer, outframes * OutputChannels());
-  }
-  mAudioVerifier.AppendDataInterleaved(mOutputBuffer, outframes,
-                                       MAX_OUTPUT_CHANNELS);
-  mPosition += outframes;
+  if (outframes > 0) {
+    if (mInputRecordingEnabled && mHasInput) {
+      mRecordedInput.AppendElements(mInputBuffer,
+                                    outframes * InputChannelsLocked());
+    }
+    if (mOutputRecordingEnabled && mHasOutput) {
+      mRecordedOutput.AppendElements(mOutputBuffer,
+
+                                     outframes * OutputChannelsLocked());
+    }
+    mAudioVerifier.AppendDataInterleaved(mOutputBuffer, outframes,
+                                         MAX_OUTPUT_CHANNELS);
+    mPosition += outframes;
 
-  mFramesProcessedEvent.Notify(outframes);
-  if (mAudioVerifier.PreSilenceEnded()) {
-    mFramesVerifiedEvent.Notify(outframes);
+    mFramesProcessedEvent.Notify(outframes);
+    if (mAudioVerifier.PreSilenceEnded()) {
+      mFramesVerifiedEvent.Notify(outframes);
+    }
   }
 
   if (outframes < aNrFrames) {
@@ -422,8 +516,9 @@ KeepProcessing MockCubebStream::Process(long aNrFrames) {
 }
 
 KeepProcessing MockCubebStream::Process10Ms() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
-  uint32_t rate = SampleRate();
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
+  MutexAutoLock l(mMutex);
+  uint32_t rate = SampleRateLocked();
   const long nrFrames =
       static_cast<long>(static_cast<float>(rate * 10) * mDriftFactor) /
       PR_MSEC_PER_SEC;
@@ -431,11 +526,14 @@ KeepProcessing MockCubebStream::Process10Ms() {
 }
 
 void MockCubebStream::NotifyState(cubeb_state aState) {
-  mStateCallback(AsCubebStream(), mUserPtr, aState);
+  mMutex.AssertCurrentThreadOwns();
+  mState = Some(aState);
+  mStateCallback(AsCubebStreamLocked(), mUserPtr, aState);
   mStateEvent.Notify(aState);
 }
 
 void MockCubebStream::NotifyDeviceChanged() {
+  MutexAutoLock l(mMutex);
   mDeviceChangedCallback(this->mUserPtr);
   mDeviceChangedForcedEvent.Notify();
 }
@@ -445,20 +543,20 @@ MockCubeb::MockCubeb() : MockCubeb(MockCubeb::RunningMode::Automatic) {}
 MockCubeb::MockCubeb(RunningMode aRunningMode)
     : ops(&mock_ops), mRunningMode(aRunningMode) {}
 
-MockCubeb::~MockCubeb() { MOZ_ASSERT(!mFakeAudioThread); };
+MockCubeb::~MockCubeb() { MOZ_RELEASE_ASSERT(!mFakeAudioThread); };
 
 void MockCubeb::Destroy() {
-  MOZ_ASSERT(mHasCubebContext);
+  MOZ_RELEASE_ASSERT(mHasCubebContext);
   {
     auto streams = mLiveStreams.Lock();
-    MOZ_ASSERT(streams->IsEmpty());
+    MOZ_RELEASE_ASSERT(streams->IsEmpty());
   }
   mDestroyed = true;
   Release();
 }
 
 cubeb* MockCubeb::AsCubebContext() {
-  MOZ_ASSERT(!mDestroyed);
+  MOZ_RELEASE_ASSERT(!mDestroyed);
   if (mHasCubebContext.compareExchange(false, true)) {
     AddRef();
   }
@@ -467,7 +565,7 @@ cubeb* MockCubeb::AsCubebContext() {
 
 MockCubeb* MockCubeb::AsMock(cubeb* aContext) {
   auto* mockCubeb = reinterpret_cast<MockCubeb*>(aContext);
-  MOZ_ASSERT(!mockCubeb->mDestroyed);
+  MOZ_RELEASE_ASSERT(!mockCubeb->mDestroyed);
   return mockCubeb;
 }
 
@@ -528,6 +626,28 @@ int MockCubeb::RegisterDeviceCollectionChangeCallback(
   return CUBEB_OK;
 }
 
+Result<cubeb_input_processing_params, int>
+MockCubeb::SupportedInputProcessingParams() const {
+  const auto& [params, rv] = mSupportedInputProcessingParams;
+  if (rv != CUBEB_OK) {
+    return Err(rv);
+  }
+  return params;
+}
+
+void MockCubeb::SetSupportedInputProcessingParams(
+    cubeb_input_processing_params aParams, int aRv) {
+  mSupportedInputProcessingParams = std::make_pair(aParams, aRv);
+}
+
+void MockCubeb::SetInputProcessingApplyRv(int aRv) {
+  mInputProcessingParamsApplyRv = aRv;
+}
+
+int MockCubeb::InputProcessingApplyRv() const {
+  return mInputProcessingParamsApplyRv;
+}
+
 void MockCubeb::AddDevice(cubeb_device_info aDevice) {
   if (aDevice.type == CUBEB_DEVICE_TYPE_INPUT) {
     mInputDevices.AppendElement(aDevice);
@@ -613,12 +733,12 @@ void MockCubeb::SetSupportDeviceChangeCallback(bool aSupports) {
 void MockCubeb::ForceStreamInitError() { mStreamInitErrorState = true; }
 
 void MockCubeb::SetStreamStartFreezeEnabled(bool aEnabled) {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   mStreamStartFreezeEnabled = aEnabled;
 }
 
 auto MockCubeb::ForceAudioThread() -> RefPtr<ForcedAudioThreadPromise> {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   RefPtr<ForcedAudioThreadPromise> p =
       mForcedAudioThreadPromise.Ensure(__func__);
   mForcedAudioThread = true;
@@ -627,7 +747,7 @@ auto MockCubeb::ForceAudioThread() -> RefPtr<ForcedAudioThreadPromise> {
 }
 
 void MockCubeb::UnforceAudioThread() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   mForcedAudioThread = false;
 }
 
@@ -660,12 +780,12 @@ void MockCubeb::StreamDestroy(MockCubebStream* aStream) {
 }
 
 void MockCubeb::GoFaster() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   mFastMode = true;
 }
 
 void MockCubeb::DontGoFaster() {
-  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
   mFastMode = false;
 }
 
@@ -679,13 +799,17 @@ MockCubeb::StreamDestroyEvent() {
 }
 
 void MockCubeb::StartStream(MockCubebStream* aStream) {
+  if (aStream) {
+    aStream->mMutex.AssertNotCurrentThreadOwns();
+  }
   auto streams = mLiveStreams.Lock();
-  MOZ_ASSERT_IF(!aStream, mForcedAudioThread);
-  // Forcing an audio thread must happen before starting streams
-  MOZ_ASSERT_IF(!aStream, streams->IsEmpty());
   if (aStream) {
-    MOZ_ASSERT(!streams->Contains(aStream->mSelf));
+    MOZ_RELEASE_ASSERT(!streams->Contains(aStream->mSelf));
     streams->AppendElement(aStream->mSelf);
+  } else {
+    MOZ_RELEASE_ASSERT(mForcedAudioThread);
+    // Forcing an audio thread must happen before starting streams
+    MOZ_RELEASE_ASSERT(streams->IsEmpty());
   }
   if (!mFakeAudioThread && mRunningMode == RunningMode::Automatic) {
     AddRef();  // released when the thread exits
@@ -694,6 +818,7 @@ void MockCubeb::StartStream(MockCubebStream* aStream) {
 }
 
 void MockCubeb::StopStream(MockCubebStream* aStream) {
+  aStream->mMutex.AssertNotCurrentThreadOwns();
   {
     auto streams = mLiveStreams.Lock();
     if (!streams->Contains(aStream->mSelf)) {
@@ -719,7 +844,7 @@ void MockCubeb::ThreadFunction() {
         }
       }
       streams->RemoveElementsBy([](const auto& stream) { return !stream; });
-      MOZ_ASSERT(mFakeAudioThread);
+      MOZ_RELEASE_ASSERT(mFakeAudioThread);
       if (streams->IsEmpty() && !mForcedAudioThread) {
         // This leaks the std::thread if Gecko's main thread has already been
         // shut down.
diff --git a/dom/media/gtest/MockCubeb.h b/dom/media/gtest/MockCubeb.h
index ed6342a779..15689a4a4e 100644
--- a/dom/media/gtest/MockCubeb.h
+++ b/dom/media/gtest/MockCubeb.h
@@ -11,12 +11,15 @@
 #include "MediaEventSource.h"
 #include "mozilla/DataMutex.h"
 #include "mozilla/MozPromise.h"
+#include "mozilla/Result.h"
+#include "mozilla/ResultVariant.h"
 #include "mozilla/ThreadSafeWeakPtr.h"
 #include "nsTArray.h"
 
 #include <thread>
 #include <atomic>
 #include <chrono>
+#include <utility>
 
 namespace mozilla {
 const uint32_t MAX_OUTPUT_CHANNELS = 2;
@@ -68,6 +71,8 @@ struct cubeb_ops {
 // Keep those and the struct definition in sync with cubeb.h and
 // cubeb-internal.h
 void cubeb_mock_destroy(cubeb* context);
+static int cubeb_mock_get_supported_input_processing_params(
+    cubeb* context, cubeb_input_processing_params* params);
 static int cubeb_mock_enumerate_devices(cubeb* context, cubeb_device_type type,
                                         cubeb_device_collection* out);
 
@@ -101,6 +106,9 @@ static int cubeb_mock_stream_set_volume(cubeb_stream* stream, float volume);
 static int cubeb_mock_stream_set_name(cubeb_stream* stream,
                                       char const* stream_name);
 
+static int cubeb_mock_stream_set_input_processing_params(
+    cubeb_stream* stream, cubeb_input_processing_params);
+
 static int cubeb_mock_stream_register_device_changed_callback(
     cubeb_stream* stream,
     cubeb_device_changed_callback device_changed_callback);
@@ -122,7 +130,7 @@ cubeb_ops const mock_ops = {
     /*.get_min_latency =*/cubeb_mock_get_min_latency,
     /*.get_preferred_sample_rate =*/cubeb_mock_get_preferred_sample_rate,
     /*.get_supported_input_processing_params =*/
-    NULL,
+    cubeb_mock_get_supported_input_processing_params,
     /*.enumerate_devices =*/cubeb_mock_enumerate_devices,
     /*.device_collection_destroy =*/cubeb_mock_device_collection_destroy,
     /*.destroy =*/cubeb_mock_destroy,
@@ -139,7 +147,7 @@ cubeb_ops const mock_ops = {
 
     /*.stream_set_input_mute =*/NULL,
     /*.stream_set_input_processing_params =*/
-    NULL,
+    cubeb_mock_stream_set_input_processing_params,
     /*.stream_device_destroy =*/NULL,
     /*.stream_register_device_changed_callback =*/
     cubeb_mock_stream_register_device_changed_callback,
@@ -160,7 +168,7 @@ class MockCubebStream {
   void* mUserPtr;
 
  public:
-  enum class KeepProcessing { No, Yes };
+  enum class KeepProcessing { No, Yes, InvalidState };
   enum class RunningMode { Automatic, Manual };
 
   MockCubebStream(cubeb* aContext, char const* aStreamName,
@@ -175,50 +183,56 @@ class MockCubebStream {
 
   ~MockCubebStream();
 
-  int Start();
-  int Stop();
-  uint64_t Position();
-  void Destroy();
-  int SetName(char const* aName);
+  int Start() MOZ_EXCLUDES(mMutex);
+  int Stop() MOZ_EXCLUDES(mMutex);
+  uint64_t Position() MOZ_EXCLUDES(mMutex);
+  void Destroy() MOZ_EXCLUDES(mMutex);
+  int SetName(char const* aName) MOZ_EXCLUDES(mMutex);
   int RegisterDeviceChangedCallback(
-      cubeb_device_changed_callback aDeviceChangedCallback);
+      cubeb_device_changed_callback aDeviceChangedCallback)
+      MOZ_EXCLUDES(mMutex);
+  int SetInputProcessingParams(cubeb_input_processing_params aParams);
 
-  cubeb_stream* AsCubebStream();
+  cubeb_stream* AsCubebStream() MOZ_EXCLUDES(mMutex);
   static MockCubebStream* AsMock(cubeb_stream* aStream);
 
-  char const* StreamName() const { return mName.get(); }
+  char const* StreamName() const MOZ_EXCLUDES(mMutex) {
+    MutexAutoLock l(mMutex);
+    return mName.get();
+  }
   cubeb_devid GetInputDeviceID() const;
   cubeb_devid GetOutputDeviceID() const;
 
-  uint32_t InputChannels() const;
-  uint32_t OutputChannels() const;
-  uint32_t SampleRate() const;
-  uint32_t InputFrequency() const;
+  uint32_t InputChannels() const MOZ_EXCLUDES(mMutex);
+  uint32_t OutputChannels() const MOZ_EXCLUDES(mMutex);
+  uint32_t SampleRate() const MOZ_EXCLUDES(mMutex);
+  uint32_t InputFrequency() const MOZ_EXCLUDES(mMutex);
+  Maybe<cubeb_state> State() const MOZ_EXCLUDES(mMutex);
 
-  void SetDriftFactor(float aDriftFactor);
-  void ForceError();
-  void ForceDeviceChanged();
-  void Thaw();
+  void SetDriftFactor(float aDriftFactor) MOZ_EXCLUDES(mMutex);
+  void ForceError() MOZ_EXCLUDES(mMutex);
+  void ForceDeviceChanged() MOZ_EXCLUDES(mMutex);
+  void Thaw() MOZ_EXCLUDES(mMutex);
 
   // For RunningMode::Manual, drive this MockCubebStream forward.
-  KeepProcessing ManualDataCallback(long aNrFrames);
+  KeepProcessing ManualDataCallback(long aNrFrames) MOZ_EXCLUDES(mMutex);
 
   // For RunningMode::Manual, notify the client of a DeviceChanged event
   // synchronously.
-  void NotifyDeviceChangedNow();
+  void NotifyDeviceChangedNow() MOZ_EXCLUDES(mMutex);
 
   // Enable input recording for this driver. This is best called before
   // the thread is running, but is safe to call whenever.
-  void SetOutputRecordingEnabled(bool aEnabled);
+  void SetOutputRecordingEnabled(bool aEnabled) MOZ_EXCLUDES(mMutex);
   // Enable input recording for this driver. This is best called before
   // the thread is running, but is safe to call whenever.
-  void SetInputRecordingEnabled(bool aEnabled);
+  void SetInputRecordingEnabled(bool aEnabled) MOZ_EXCLUDES(mMutex);
   // Get the recorded output from this stream. This doesn't copy, and therefore
   // only works once.
-  nsTArray<AudioDataValue>&& TakeRecordedOutput();
+  nsTArray<AudioDataValue>&& TakeRecordedOutput() MOZ_EXCLUDES(mMutex);
   // Get the recorded input from this stream. This doesn't copy, and therefore
   // only works once.
-  nsTArray<AudioDataValue>&& TakeRecordedInput();
+  nsTArray<AudioDataValue>&& TakeRecordedInput() MOZ_EXCLUDES(mMutex);
 
   MediaEventSource<nsCString>& NameSetEvent();
   MediaEventSource<cubeb_state>& StateEvent();
@@ -232,7 +246,13 @@ class MockCubebStream {
   MediaEventSource<void>& DeviceChangeForcedEvent();
 
  private:
-  KeepProcessing Process(long aNrFrames);
+  cubeb_stream* AsCubebStreamLocked() MOZ_REQUIRES(mMutex);
+  static MockCubebStream* AsMockLocked(cubeb_stream* aStream);
+  uint32_t InputChannelsLocked() const MOZ_REQUIRES(mMutex);
+  uint32_t OutputChannelsLocked() const MOZ_REQUIRES(mMutex);
+  uint32_t SampleRateLocked() const MOZ_REQUIRES(mMutex);
+  uint32_t InputFrequencyLocked() const MOZ_REQUIRES(mMutex);
+  KeepProcessing Process(long aNrFrames) MOZ_REQUIRES(mMutex);
   KeepProcessing Process10Ms();
 
  public:
@@ -242,52 +262,58 @@ class MockCubebStream {
   SmartMockCubebStream* const mSelf;
 
  private:
-  void NotifyState(cubeb_state aState);
-  void NotifyDeviceChanged();
+  void NotifyState(cubeb_state aState) MOZ_REQUIRES(mMutex);
+  void NotifyDeviceChanged() MOZ_EXCLUDES(mMutex);
 
   static constexpr long kMaxNrFrames = 1920;
+  // Mutex guarding most members to ensure state is in sync.
+  mutable Mutex mMutex{"MockCubebStream::mMutex"};
   // Monitor used to block start until mFrozenStart is false.
-  Monitor mFrozenStartMonitor MOZ_UNANNOTATED;
+  Monitor mFrozenStartMonitor MOZ_ACQUIRED_BEFORE(mMutex);
   // Whether this stream should wait for an explicit start request before
-  // starting. Protected by FrozenStartMonitor.
-  bool mFrozenStart;
+  // starting.
+  bool mFrozenStart MOZ_GUARDED_BY(mFrozenStartMonitor);
+  // The stream's most recently issued state change, if any has occurred.
   // Used to abort a frozen start if cubeb_stream_start() is called currently
   // with a blocked cubeb_stream_start() call.
-  std::atomic_bool mStreamStop{true};
+  Maybe<cubeb_state> mState MOZ_GUARDED_BY(mMutex);
   // Whether or not the output-side of this stream (what is written from the
   // callback output buffer) is recorded in an internal buffer. The data is then
   // available via `GetRecordedOutput`.
-  std::atomic_bool mOutputRecordingEnabled{false};
+  bool mOutputRecordingEnabled MOZ_GUARDED_BY(mMutex) = false;
   // Whether or not the input-side of this stream (what is written from the
   // callback input buffer) is recorded in an internal buffer. The data is then
   // available via `TakeRecordedInput`.
-  std::atomic_bool mInputRecordingEnabled{false};
+  bool mInputRecordingEnabled MOZ_GUARDED_BY(mMutex) = false;
   // The audio buffer used on data callback.
-  AudioDataValue mOutputBuffer[MAX_OUTPUT_CHANNELS * kMaxNrFrames] = {};
-  AudioDataValue mInputBuffer[MAX_INPUT_CHANNELS * kMaxNrFrames] = {};
+  AudioDataValue mOutputBuffer[MAX_OUTPUT_CHANNELS *
+                               kMaxNrFrames] MOZ_GUARDED_BY(mMutex) = {};
+  AudioDataValue mInputBuffer[MAX_INPUT_CHANNELS * kMaxNrFrames] MOZ_GUARDED_BY(
+      mMutex) = {};
   // The audio callback
-  cubeb_data_callback mDataCallback = nullptr;
+  const cubeb_data_callback mDataCallback = nullptr;
   // The stream state callback
-  cubeb_state_callback mStateCallback = nullptr;
+  const cubeb_state_callback mStateCallback = nullptr;
   // The device changed callback
-  cubeb_device_changed_callback mDeviceChangedCallback = nullptr;
+  cubeb_device_changed_callback mDeviceChangedCallback MOZ_GUARDED_BY(mMutex) =
+      nullptr;
   // A name for this stream
-  nsCString mName;
+  nsCString mName MOZ_GUARDED_BY(mMutex);
   // The stream params
-  cubeb_stream_params mOutputParams = {};
-  cubeb_stream_params mInputParams = {};
+  cubeb_stream_params mOutputParams MOZ_GUARDED_BY(mMutex) = {};
+  cubeb_stream_params mInputParams MOZ_GUARDED_BY(mMutex) = {};
   /* Device IDs */
-  cubeb_devid mInputDeviceID;
-  cubeb_devid mOutputDeviceID;
-
-  std::atomic<float> mDriftFactor{1.0};
-  std::atomic_bool mFastMode{false};
-  std::atomic_bool mForceErrorState{false};
-  std::atomic_bool mForceDeviceChanged{false};
-  std::atomic_bool mDestroyed{false};
-  std::atomic<uint64_t> mPosition{0};
-  AudioGenerator<AudioDataValue> mAudioGenerator;
-  AudioVerifier<AudioDataValue> mAudioVerifier;
+  const cubeb_devid mInputDeviceID;
+  const cubeb_devid mOutputDeviceID;
+
+  float mDriftFactor MOZ_GUARDED_BY(mMutex) = 1.0;
+  bool mFastMode MOZ_GUARDED_BY(mMutex) = false;
+  bool mForceErrorState MOZ_GUARDED_BY(mMutex) = false;
+  bool mForceDeviceChanged MOZ_GUARDED_BY(mMutex) = false;
+  bool mDestroyed MOZ_GUARDED_BY(mMutex) = false;
+  uint64_t mPosition MOZ_GUARDED_BY(mMutex) = 0;
+  AudioGenerator<AudioDataValue> mAudioGenerator MOZ_GUARDED_BY(mMutex);
+  AudioVerifier<AudioDataValue> mAudioVerifier MOZ_GUARDED_BY(mMutex);
 
   MediaEventProducer<nsCString> mNameSetEvent;
   MediaEventProducer<cubeb_state> mStateEvent;
@@ -299,12 +325,29 @@ class MockCubebStream {
   MediaEventProducer<void> mDeviceChangedForcedEvent;
   // The recorded data, copied from the output_buffer of the callback.
   // Interleaved.
-  nsTArray<AudioDataValue> mRecordedOutput;
+  nsTArray<AudioDataValue> mRecordedOutput MOZ_GUARDED_BY(mMutex);
   // The recorded data, copied from the input buffer of the callback.
   // Interleaved.
-  nsTArray<AudioDataValue> mRecordedInput;
+  nsTArray<AudioDataValue> mRecordedInput MOZ_GUARDED_BY(mMutex);
 };
 
+inline std::ostream& operator<<(std::ostream& aStream,
+                                const MockCubebStream::KeepProcessing& aVal) {
+  switch (aVal) {
+    case MockCubebStream::KeepProcessing::Yes:
+      aStream << "KeepProcessing::Yes";
+      return aStream;
+    case MockCubebStream::KeepProcessing::No:
+      aStream << "KeepProcessing::No";
+      return aStream;
+    case MockCubebStream::KeepProcessing::InvalidState:
+      aStream << "KeepProcessing::InvalidState";
+      return aStream;
+  }
+  aStream << "KeepProcessing(invalid " << static_cast<uint32_t>(aVal) << ")";
+  return aStream;
+}
+
 class SmartMockCubebStream
     : public MockCubebStream,
       public SupportsThreadSafeWeakPtr<SmartMockCubebStream> {
@@ -362,6 +405,16 @@ class MockCubeb {
       cubeb_device_type aDevType,
       cubeb_device_collection_changed_callback aCallback, void* aUserPtr);
 
+  Result<cubeb_input_processing_params, int> SupportedInputProcessingParams()
+      const;
+  void SetSupportedInputProcessingParams(cubeb_input_processing_params aParams,
+                                         int aRv);
+  // Set the rv to be returned when SetInputProcessingParams for any stream of
+  // this context would apply the params to the stream, i.e. after passing the
+  // supported-params check.
+  void SetInputProcessingApplyRv(int aRv);
+  int InputProcessingApplyRv() const;
+
   // Control API
 
   // Add an input or output device to this backend. This calls the device
@@ -455,6 +508,10 @@ class MockCubeb {
   // notification via a system callback. If not, Gecko is expected to re-query
   // the list every time.
   bool mSupportsDeviceCollectionChangedCallback = true;
+  std::pair<cubeb_input_processing_params, int>
+      mSupportedInputProcessingParams = std::make_pair(
+          CUBEB_INPUT_PROCESSING_PARAM_NONE, CUBEB_ERROR_NOT_SUPPORTED);
+  int mInputProcessingParamsApplyRv = CUBEB_OK;
   const RunningMode mRunningMode;
   Atomic<bool> mStreamInitErrorState;
   // Whether new MockCubebStreams should be frozen on start.
@@ -502,6 +559,18 @@ int cubeb_mock_register_device_collection_changed(
       devtype, callback, user_ptr);
 }
 
+int cubeb_mock_get_supported_input_processing_params(
+    cubeb* context, cubeb_input_processing_params* params) {
+  Result<cubeb_input_processing_params, int> res =
+      MockCubeb::AsMock(context)->SupportedInputProcessingParams();
+  if (res.isErr()) {
+    *params = CUBEB_INPUT_PROCESSING_PARAM_NONE;
+    return res.unwrapErr();
+  }
+  *params = res.unwrap();
+  return CUBEB_OK;
+}
+
 int cubeb_mock_stream_init(
     cubeb* context, cubeb_stream** stream, char const* stream_name,
     cubeb_devid input_device, cubeb_stream_params* input_stream_params,
@@ -562,6 +631,11 @@ int cubeb_mock_stream_register_device_changed_callback(
       device_changed_callback);
 }
 
+static int cubeb_mock_stream_set_input_processing_params(
+    cubeb_stream* stream, cubeb_input_processing_params params) {
+  return MockCubebStream::AsMock(stream)->SetInputProcessingParams(params);
+}
+
 int cubeb_mock_get_min_latency(cubeb* context, cubeb_stream_params params,
                                uint32_t* latency_ms) {
   *latency_ms = 10;
diff --git a/dom/media/gtest/TestAudioCallbackDriver.cpp b/dom/media/gtest/TestAudioCallbackDriver.cpp
index 050395fa44..9c8c9bd107 100644
--- a/dom/media/gtest/TestAudioCallbackDriver.cpp
+++ b/dom/media/gtest/TestAudioCallbackDriver.cpp
@@ -9,34 +9,39 @@
 #include "GraphDriver.h"
 
 #include "gmock/gmock.h"
-#include "gtest/gtest-printers.h"
 #include "gtest/gtest.h"
 
 #include "MediaTrackGraphImpl.h"
 #include "mozilla/gtest/WaitFor.h"
 #include "mozilla/Attributes.h"
 #include "mozilla/SyncRunnable.h"
-#include "mozilla/UniquePtr.h"
 #include "nsTArray.h"
 
 #include "MockCubeb.h"
 
-using namespace mozilla;
+namespace mozilla {
+
 using IterationResult = GraphInterface::IterationResult;
 using ::testing::_;
 using ::testing::AnyNumber;
+using ::testing::AtMost;
+using ::testing::Eq;
+using ::testing::InSequence;
 using ::testing::NiceMock;
 
 class MockGraphInterface : public GraphInterface {
   NS_DECL_THREADSAFE_ISUPPORTS
   explicit MockGraphInterface(TrackRate aSampleRate)
       : mSampleRate(aSampleRate) {}
-  MOCK_METHOD0(NotifyInputStopped, void());
-  MOCK_METHOD5(NotifyInputData, void(const AudioDataValue*, size_t, TrackRate,
-                                     uint32_t, uint32_t));
-  MOCK_METHOD0(DeviceChanged, void());
+  MOCK_METHOD(void, NotifyInputStopped, ());
+  MOCK_METHOD(void, NotifyInputData,
+              (const AudioDataValue*, size_t, TrackRate, uint32_t, uint32_t));
+  MOCK_METHOD(void, NotifySetRequestedInputProcessingParamsResult,
+              (AudioCallbackDriver*, cubeb_input_processing_params,
+               (Result<cubeb_input_processing_params, int>&&)));
+  MOCK_METHOD(void, DeviceChanged, ());
 #ifdef DEBUG
-  MOCK_CONST_METHOD1(InDriverIteration, bool(const GraphDriver*));
+  MOCK_METHOD(bool, InDriverIteration, (const GraphDriver*), (const));
 #endif
   /* OneIteration cannot be mocked because IterationResult is non-memmovable and
    * cannot be passed as a parameter, which GMock does internally. */
@@ -81,7 +86,7 @@ class MockGraphInterface : public GraphInterface {
                 RefPtr<Runnable> aSwitchedRunnable = NS_NewRunnableFunction(
                     "DefaultNoopSwitchedRunnable", [] {})) {
     auto guard = mNextDriver.Lock();
-    MOZ_ASSERT(guard->isNothing());
+    MOZ_RELEASE_ASSERT(guard->isNothing());
     *guard =
         Some(std::make_tuple(std::move(aDriver), std::move(aSwitchedRunnable)));
   }
@@ -108,7 +113,7 @@ class MockGraphInterface : public GraphInterface {
 NS_IMPL_ISUPPORTS0(MockGraphInterface)
 
 TEST(TestAudioCallbackDriver, StartStop)
-MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
+MOZ_CAN_RUN_SCRIPT_BOUNDARY {
   const TrackRate rate = 44100;
   MockCubeb* cubeb = new MockCubeb();
   CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
@@ -118,7 +123,8 @@ MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
   EXPECT_CALL(*graph, NotifyInputStopped).Times(0);
 
   driver = MakeRefPtr<AudioCallbackDriver>(graph, nullptr, rate, 2, 0, nullptr,
-                                           nullptr, AudioInputType::Unknown);
+                                           nullptr, AudioInputType::Unknown,
+                                           CUBEB_INPUT_PROCESSING_PARAM_NONE);
   EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
   EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
 
@@ -135,7 +141,7 @@ MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
   EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
 }
 
-void TestSlowStart(const TrackRate aRate) MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
+void TestSlowStart(const TrackRate aRate) MOZ_CAN_RUN_SCRIPT_BOUNDARY {
   std::cerr << "TestSlowStart with rate " << aRate << std::endl;
 
   MockCubeb* cubeb = new MockCubeb();
@@ -177,15 +183,17 @@ void TestSlowStart(const TrackRate aRate) MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
       });
 
   driver = MakeRefPtr<AudioCallbackDriver>(graph, nullptr, aRate, 2, 2, nullptr,
-                                           (void*)1, AudioInputType::Voice);
+                                           (void*)1, AudioInputType::Voice,
+                                           CUBEB_INPUT_PROCESSING_PARAM_NONE);
   EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
   EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
 
   graph->SetCurrentDriver(driver);
   graph->SetEnsureNextIteration(true);
 
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
   driver->Start();
-  RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
+  auto [stream] = WaitFor(initPromise).unwrap()[0];
   cubeb->SetStreamStartFreezeEnabled(false);
 
   const size_t fallbackIterations = 3;
@@ -234,7 +242,7 @@ void TestSlowStart(const TrackRate aRate) MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
 }
 
 TEST(TestAudioCallbackDriver, SlowStart)
-MOZ_CAN_RUN_SCRIPT_FOR_DEFINITION {
+{
   TestSlowStart(1000);   // 10ms = 10 <<< 128 samples
   TestSlowStart(8000);   // 10ms = 80  <  128 samples
   TestSlowStart(44100);  // 10ms = 441 >  128 samples
@@ -252,7 +260,7 @@ class MOZ_STACK_CLASS AutoSetter {
       : mVal(aVal), mNew(aNew), mOld(mVal.exchange(aNew)) {}
   ~AutoSetter() {
     DebugOnly<T> oldNew = mVal.exchange(mOld);
-    MOZ_ASSERT(oldNew == mNew);
+    MOZ_RELEASE_ASSERT(oldNew == mNew);
   }
 };
 #endif
@@ -265,12 +273,13 @@ MOZ_CAN_RUN_SCRIPT_BOUNDARY {
 
   auto graph = MakeRefPtr<MockGraphInterface>(rate);
   auto driver = MakeRefPtr<AudioCallbackDriver>(
-      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice);
+      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice,
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
   EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
   EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
 
 #ifdef DEBUG
-  std::atomic<std::thread::id> threadInDriverIteration((std::thread::id()));
+  std::atomic<std::thread::id> threadInDriverIteration{std::thread::id()};
   EXPECT_CALL(*graph, InDriverIteration(driver.get())).WillRepeatedly([&] {
     return std::this_thread::get_id() == threadInDriverIteration;
   });
@@ -279,17 +288,24 @@ MOZ_CAN_RUN_SCRIPT_BOUNDARY {
   EXPECT_CALL(*graph, NotifyInputData(_, 0, rate, 1, _)).Times(AnyNumber());
   EXPECT_CALL(*graph, NotifyInputData(_, ignoredFrameCount, _, _, _)).Times(0);
   EXPECT_CALL(*graph, DeviceChanged);
+  Result<cubeb_input_processing_params, int> expected =
+      Err(CUBEB_ERROR_NOT_SUPPORTED);
+  EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                          driver.get(), CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                          Eq(std::ref(expected))));
 
   graph->SetCurrentDriver(driver);
   graph->SetEnsureNextIteration(true);
   // This starts the fallback driver.
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
   driver->Start();
-  RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
+  auto [stream] = WaitFor(initPromise).unwrap()[0];
 
   // Wait for the audio driver to have started the stream before running data
   // callbacks. driver->Start() does a dispatch to the cubeb operation thread
   // and starts the stream there.
-  nsCOMPtr<nsIEventTarget> cubebOpThread = CUBEB_TASK_THREAD;
+  nsCOMPtr<nsIEventTarget> cubebOpThread =
+      CubebUtils::GetCubebOperationThread();
   MOZ_ALWAYS_SUCCEEDS(SyncRunnable::DispatchToThread(
       cubebOpThread, NS_NewRunnableFunction(__func__, [] {})));
 
@@ -393,85 +409,412 @@ MOZ_CAN_RUN_SCRIPT_BOUNDARY {
 
   auto graph = MakeRefPtr<MockGraphInterface>(rate);
   auto driver = MakeRefPtr<AudioCallbackDriver>(
-      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice);
+      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice,
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
   EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
   EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
 
   auto newDriver = MakeRefPtr<AudioCallbackDriver>(
-      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice);
+      graph, nullptr, rate, 2, 1, nullptr, (void*)1, AudioInputType::Voice,
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
   EXPECT_FALSE(newDriver->ThreadRunning()) << "Verify thread is not running";
   EXPECT_FALSE(newDriver->IsStarted()) << "Verify thread is not started";
 
 #ifdef DEBUG
-  std::atomic<std::thread::id> threadInDriverIteration(
-      (std::this_thread::get_id()));
+  std::atomic<std::thread::id> threadInDriverIteration{
+      std::this_thread::get_id()};
   EXPECT_CALL(*graph, InDriverIteration(_)).WillRepeatedly([&] {
     return std::this_thread::get_id() == threadInDriverIteration;
   });
 #endif
   EXPECT_CALL(*graph, NotifyInputData(_, 0, rate, 1, _)).Times(AnyNumber());
-  EXPECT_CALL(*graph, DeviceChanged);
+  // This only happens if the first fallback driver is stopped by the audio
+  // driver handover rather than the driver switch. It happens when the
+  // subsequent audio callback performs the switch.
+  EXPECT_CALL(*graph, NotifyInputStopped()).Times(AtMost(1));
+  Result<cubeb_input_processing_params, int> expected =
+      Err(CUBEB_ERROR_NOT_SUPPORTED);
+  EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                          driver.get(), CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                          Eq(std::ref(expected))));
+  EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                          newDriver.get(), CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                          Eq(std::ref(expected))));
 
   graph->SetCurrentDriver(driver);
   graph->SetEnsureNextIteration(true);
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
   // This starts the fallback driver.
   driver->Start();
-  RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
+  RefPtr<SmartMockCubebStream> stream;
+  std::tie(stream) = WaitFor(initPromise).unwrap()[0];
 
   // Wait for the audio driver to have started or the DeviceChanged event will
   // be ignored. driver->Start() does a dispatch to the cubeb operation thread
   // and starts the stream there.
-  nsCOMPtr<nsIEventTarget> cubebOpThread = CUBEB_TASK_THREAD;
+  nsCOMPtr<nsIEventTarget> cubebOpThread =
+      CubebUtils::GetCubebOperationThread();
   MOZ_ALWAYS_SUCCEEDS(SyncRunnable::DispatchToThread(
       cubebOpThread, NS_NewRunnableFunction(__func__, [] {})));
 
-#ifdef DEBUG
-  AutoSetter as(threadInDriverIteration, std::this_thread::get_id());
-#endif
+  initPromise = TakeN(cubeb->StreamInitEvent(), 1);
+  Monitor mon(__func__);
+  bool canContinueToStartNextDriver = false;
+  bool continued = false;
 
   // This marks the audio driver as running.
   EXPECT_EQ(stream->ManualDataCallback(0),
             MockCubebStream::KeepProcessing::Yes);
 
-  // If a fallback driver callback happens between the audio callback above, and
-  // the SwitchTo below, the audio driver will perform the switch instead of the
-  // fallback since the fallback will have stopped. This test may therefore
-  // intermittently take different code paths.
-
-  // Stop the fallback driver by switching audio driver in the graph.
-  {
-    Monitor mon(__func__);
-    MonitorAutoLock lock(mon);
-    bool switched = false;
-    graph->SwitchTo(newDriver, NS_NewRunnableFunction(__func__, [&] {
-                      MonitorAutoLock lock(mon);
-                      switched = true;
-                      lock.Notify();
-                    }));
-    while (!switched) {
-      lock.Wait();
-    }
+  // To satisfy TSAN's lock-order-inversion checking we avoid locking stream's
+  // mMutex (by calling ManualDataCallback) under mon. The SwitchTo runnable
+  // below already locks mon under stream's mMutex.
+  MonitorAutoLock lock(mon);
+
+  // If a fallback driver callback happens between the audio callback
+  // above, and the SwitchTo below, the driver will enter
+  // `FallbackDriverState::None`, relying on the audio driver to
+  // iterate the graph, including performing the driver switch. This
+  // test may therefore intermittently take different code paths.
+  // Note however that the fallback driver runs every ~10ms while the
+  // time from the manual callback above to telling the mock graph to
+  // switch drivers below is much much shorter. The vast majority of
+  // test runs will exercise the intended code path.
+
+  // Make the fallback driver enter FallbackDriverState::Stopped by
+  // switching audio driver in the graph.
+  graph->SwitchTo(newDriver, NS_NewRunnableFunction(__func__, [&] {
+                    MonitorAutoLock lock(mon);
+                    // Block the fallback driver on its thread until
+                    // the test on main thread has finished testing
+                    // what it needs.
+                    while (!canContinueToStartNextDriver) {
+                      lock.Wait();
+                    }
+                    // Notify the test that it can take these
+                    // variables off the stack now.
+                    continued = true;
+                    lock.Notify();
+                  }));
+
+  // Wait for the fallback driver to stop running.
+  while (driver->OnFallback()) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
   }
 
-  {
+  if (driver->HasFallback()) {
+    // Driver entered FallbackDriverState::Stopped as desired.
+    // Proceed with a DeviceChangedCallback.
+
+    EXPECT_CALL(*graph, DeviceChanged);
+
+    {
 #ifdef DEBUG
-    AutoSetter as(threadInDriverIteration, std::thread::id());
+      AutoSetter as(threadInDriverIteration, std::thread::id());
 #endif
-    // After stopping the fallback driver, but before newDriver has stopped the
-    // old audio driver, fire a DeviceChanged event to ensure it is handled
-    // properly.
-    AudioCallbackDriver::DeviceChangedCallback_s(driver);
+      // After stopping the fallback driver, but before newDriver has
+      // stopped the old audio driver, fire a DeviceChanged event to
+      // ensure it is handled properly.
+      AudioCallbackDriver::DeviceChangedCallback_s(driver);
+    }
+
+    EXPECT_FALSE(driver->OnFallback())
+        << "DeviceChangedCallback after stopping must not start the "
+           "fallback driver again";
   }
 
+  // Iterate the audio driver on a background thread in case the fallback
+  // driver completed the handover to the audio driver before the switch
+  // above. Doing the switch would deadlock as the switch runnable waits on
+  // mon.
+  NS_DispatchBackgroundTask(NS_NewRunnableFunction(
+      "DeviceChangeAfterStop::postSwitchManualAudioCallback", [stream] {
+        // An audio callback after switching must tell the stream to stop.
+        EXPECT_EQ(stream->ManualDataCallback(0),
+                  MockCubebStream::KeepProcessing::No);
+      }));
+
+  // Unblock the fallback driver.
+  canContinueToStartNextDriver = true;
+  lock.Notify();
+
+  // Wait for the fallback driver to continue, so we can clear the
+  // stack.
+  while (!continued) {
+    lock.Wait();
+  }
+
+  // Wait for newDriver's cubeb stream to init.
+  std::tie(stream) = WaitFor(initPromise).unwrap()[0];
+
   graph->StopIterating();
   newDriver->EnsureNextIteration();
   while (newDriver->OnFallback()) {
     std::this_thread::sleep_for(std::chrono::milliseconds(1));
   }
 
-  // This will block until all events have been queued.
-  MOZ_KnownLive(driver)->Shutdown();
-  MOZ_KnownLive(newDriver)->Shutdown();
+  {
+#ifdef DEBUG
+    AutoSetter as(threadInDriverIteration, std::thread::id());
+#endif
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::No);
+  }
+
   // Drain the event queue.
   NS_ProcessPendingEvents(nullptr);
 }
+
+void TestInputProcessingOnStart(
+    MockCubeb* aCubeb, cubeb_input_processing_params aRequested,
+    const Result<cubeb_input_processing_params, int>& aExpected)
+    MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+  const TrackRate rate = 44100;
+
+  auto graph = MakeRefPtr<NiceMock<MockGraphInterface>>(rate);
+  auto driver = MakeRefPtr<AudioCallbackDriver>(
+      graph, nullptr, rate, 2, 1, nullptr, nullptr, AudioInputType::Voice,
+      aRequested);
+  EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
+  EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
+
+#ifdef DEBUG
+  std::atomic_bool inGraphIteration{false};
+  ON_CALL(*graph, InDriverIteration(_)).WillByDefault([&] {
+    return inGraphIteration.load() && NS_IsMainThread();
+  });
+#endif
+  bool notified = false;
+  EXPECT_CALL(*graph, NotifyInputStopped).Times(0);
+  EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                          driver.get(), aRequested, Eq(std::ref(aExpected))))
+      .WillOnce([&] { notified = true; });
+
+  graph->SetCurrentDriver(driver);
+  auto initPromise = TakeN(aCubeb->StreamInitEvent(), 1);
+  driver->Start();
+  auto [stream] = WaitFor(initPromise).unwrap()[0];
+
+  // Wait for the audio driver to have started the stream before running data
+  // callbacks. driver->Start() does a dispatch to the cubeb operation thread
+  // and starts the stream there.
+  nsCOMPtr<nsIEventTarget> cubebOpThread =
+      CubebUtils::GetCubebOperationThread();
+  MOZ_ALWAYS_SUCCEEDS(SyncRunnable::DispatchToThread(
+      cubebOpThread, NS_NewRunnableFunction(__func__, [] {})));
+
+  // This makes the fallback driver stop on its next callback.
+  {
+#ifdef DEBUG
+    AutoSetter as(inGraphIteration, true);
+#endif
+    while (driver->OnFallback()) {
+      stream->ManualDataCallback(0);
+      std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    }
+  }
+
+  while (!notified) {
+    NS_ProcessNextEvent();
+  }
+
+  // This will block untill all events have been executed.
+  MOZ_KnownLive(driver)->Shutdown();
+  EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
+  EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
+}
+
+TEST(TestAudioCallbackDriver, InputProcessingOnStart)
+{
+  constexpr cubeb_input_processing_params allParams =
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+      CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL |
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION |
+      CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION;
+
+  MockCubeb* cubeb = new MockCubeb(MockCubeb::RunningMode::Manual);
+  CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
+
+  // Not supported by backend.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_ERROR_NOT_SUPPORTED);
+  TestInputProcessingOnStart(cubeb,
+                             CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                             Err(CUBEB_ERROR_NOT_SUPPORTED));
+
+  // Not supported by params.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_OK);
+  TestInputProcessingOnStart(cubeb,
+                             CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                             CUBEB_INPUT_PROCESSING_PARAM_NONE);
+
+  // Successful all.
+  cubeb->SetSupportedInputProcessingParams(allParams, CUBEB_OK);
+  TestInputProcessingOnStart(cubeb, allParams, allParams);
+
+  // Successful partial.
+  TestInputProcessingOnStart(cubeb,
+                             CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                             CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+
+  // Not supported by stream.
+  cubeb->SetInputProcessingApplyRv(CUBEB_ERROR);
+  TestInputProcessingOnStart(
+      cubeb, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION, Err(CUBEB_ERROR));
+}
+
+TEST(TestAudioCallbackDriver, InputProcessingWhileRunning)
+MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+  constexpr TrackRate rate = 44100;
+  constexpr cubeb_input_processing_params allParams =
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+      CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL |
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION |
+      CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION;
+  constexpr int applyError = 99;
+
+  int numNotifications = 0;
+  const auto signal = [&]() mutable {
+    MOZ_ASSERT(NS_IsMainThread());
+    ++numNotifications;
+  };
+  const auto waitForSignal = [&](int aNotification) {
+    while (numNotifications < aNotification) {
+      NS_ProcessNextEvent();
+    }
+  };
+  MockCubeb* cubeb = new MockCubeb(MockCubeb::RunningMode::Manual);
+  CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
+
+  auto graph = MakeRefPtr<NiceMock<MockGraphInterface>>(rate);
+  auto driver = MakeRefPtr<AudioCallbackDriver>(
+      graph, nullptr, rate, 2, 1, nullptr, nullptr, AudioInputType::Voice,
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
+  EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
+
+  EXPECT_CALL(*graph, NotifyInputStopped).Times(0);
+  // Expectations
+  const Result<cubeb_input_processing_params, int> noneResult =
+      CUBEB_INPUT_PROCESSING_PARAM_NONE;
+  const Result<cubeb_input_processing_params, int> aecResult =
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION;
+  const Result<cubeb_input_processing_params, int> allResult = allParams;
+  const Result<cubeb_input_processing_params, int> notSupportedResult =
+      Err(CUBEB_ERROR_NOT_SUPPORTED);
+  const Result<cubeb_input_processing_params, int> applyErrorResult =
+      Err(applyError);
+  {
+    InSequence s;
+
+    // Notified on start.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(), CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                            Eq(std::ref(notSupportedResult))))
+        .WillOnce(signal);
+    // Not supported by backend.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(),
+                            CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+                            Eq(std::ref(notSupportedResult))))
+        .WillOnce(signal);
+    // Not supported by params.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(),
+                            CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                            Eq(std::ref(noneResult))))
+        .WillOnce(signal);
+    // Successful all.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(), allParams, Eq(std::ref(allResult))))
+        .WillOnce(signal);
+    // Successful partial.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(),
+                            CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                            Eq(std::ref(aecResult))))
+        .WillOnce(signal);
+    // Not supported by stream.
+    EXPECT_CALL(*graph, NotifySetRequestedInputProcessingParamsResult(
+                            driver.get(),
+                            CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+                            Eq(std::ref(applyErrorResult))))
+        .WillOnce(signal);
+  }
+
+#ifdef DEBUG
+  std::atomic_bool inGraphIteration{false};
+  ON_CALL(*graph, InDriverIteration(_)).WillByDefault([&] {
+    return inGraphIteration.load() && NS_IsMainThread();
+  });
+#endif
+
+  const auto setParams = [&](cubeb_input_processing_params aParams) {
+    {
+#ifdef DEBUG
+      AutoSetter as(inGraphIteration, true);
+#endif
+      driver->SetRequestedInputProcessingParams(aParams);
+    }
+  };
+
+  graph->SetCurrentDriver(driver);
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
+  driver->Start();
+  auto [stream] = WaitFor(initPromise).unwrap()[0];
+
+  // Wait for the audio driver to have started the stream before running data
+  // callbacks. driver->Start() does a dispatch to the cubeb operation thread
+  // and starts the stream there.
+  nsCOMPtr<nsIEventTarget> cubebOpThread =
+      CubebUtils::GetCubebOperationThread();
+  MOZ_ALWAYS_SUCCEEDS(SyncRunnable::DispatchToThread(
+      cubebOpThread, NS_NewRunnableFunction(__func__, [] {})));
+
+  // This makes the fallback driver stop on its next callback.
+
+  {
+#ifdef DEBUG
+    AutoSetter as(inGraphIteration, true);
+#endif
+    while (driver->OnFallback()) {
+      stream->ManualDataCallback(0);
+      std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    }
+  }
+  waitForSignal(1);
+
+  // Not supported by backend.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_ERROR_NOT_SUPPORTED);
+  setParams(CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION);
+  waitForSignal(2);
+
+  // Not supported by params.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_OK);
+  setParams(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  waitForSignal(3);
+
+  // Successful all.
+  cubeb->SetSupportedInputProcessingParams(allParams, CUBEB_OK);
+  setParams(allParams);
+  waitForSignal(4);
+
+  // Successful partial.
+  setParams(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  waitForSignal(5);
+
+  // Not supported by stream.
+  cubeb->SetInputProcessingApplyRv(applyError);
+  setParams(CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION);
+  waitForSignal(6);
+
+  // This will block untill all events have been executed.
+  MOZ_KnownLive(driver)->Shutdown();
+  EXPECT_FALSE(driver->ThreadRunning()) << "Verify thread is not running";
+  EXPECT_FALSE(driver->IsStarted()) << "Verify thread is not started";
+}
+
+}  // namespace mozilla
diff --git a/dom/media/gtest/TestAudioInputProcessing.cpp b/dom/media/gtest/TestAudioInputProcessing.cpp
index d21c37a900..e357839768 100644
--- a/dom/media/gtest/TestAudioInputProcessing.cpp
+++ b/dom/media/gtest/TestAudioInputProcessing.cpp
@@ -428,3 +428,178 @@ TEST(TestAudioInputProcessing, Downmixing)
   aip->Stop(graph);
   track->Destroy();
 }
+
+TEST(TestAudioInputProcessing, DisabledPlatformProcessing)
+{
+  const TrackRate rate = 44100;
+  const uint32_t channels = 1;
+  auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate);
+  graph->Init(channels);
+
+  auto aip = MakeRefPtr<AudioInputProcessing>(channels);
+
+  MediaEnginePrefs settings;
+  settings.mUsePlatformProcessing = false;
+  settings.mAecOn = true;
+  aip->ApplySettings(graph, nullptr, settings);
+  aip->Start(graph);
+
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_NONE);
+
+  aip->Stop(graph);
+  graph->Destroy();
+}
+
+TEST(TestAudioInputProcessing, EnabledPlatformProcessing)
+{
+  const TrackRate rate = 44100;
+  const uint32_t channels = 1;
+  auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate);
+  graph->Init(channels);
+
+  auto aip = MakeRefPtr<AudioInputProcessing>(channels);
+
+  MediaEnginePrefs settings;
+  settings.mUsePlatformProcessing = true;
+  settings.mAecOn = true;
+  aip->ApplySettings(graph, nullptr, settings);
+  aip->Start(graph);
+
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+
+  aip->Stop(graph);
+  graph->Destroy();
+}
+
+namespace webrtc {
+bool operator==(const AudioProcessing::Config& aLhs,
+                const AudioProcessing::Config& aRhs) {
+  return aLhs.echo_canceller.enabled == aRhs.echo_canceller.enabled &&
+         (aLhs.gain_controller1.enabled == aRhs.gain_controller1.enabled ||
+          aLhs.gain_controller2.enabled == aRhs.gain_controller2.enabled) &&
+         aLhs.noise_suppression.enabled == aRhs.noise_suppression.enabled;
+}
+
+static std::ostream& operator<<(
+    std::ostream& aStream, const webrtc::AudioProcessing::Config& aConfig) {
+  aStream << "webrtc::AudioProcessing::Config[";
+  bool hadPrior = false;
+  if (aConfig.echo_canceller.enabled) {
+    aStream << "AEC";
+    hadPrior = true;
+  }
+  if (aConfig.gain_controller1.enabled || aConfig.gain_controller2.enabled) {
+    if (hadPrior) {
+      aStream << ", ";
+    }
+    aStream << "AGC";
+  }
+  if (aConfig.noise_suppression.enabled) {
+    if (hadPrior) {
+      aStream << ", ";
+    }
+    aStream << "NS";
+  }
+  aStream << "]";
+  return aStream;
+}
+}  // namespace webrtc
+
+TEST(TestAudioInputProcessing, PlatformProcessing)
+{
+  const TrackRate rate = 44100;
+  const uint32_t channels = 1;
+  auto graph = MakeRefPtr<NiceMock<MockGraph>>(rate);
+  graph->Init(channels);
+
+  auto aip = MakeRefPtr<AudioInputProcessing>(channels);
+
+  MediaEnginePrefs settings;
+  settings.mUsePlatformProcessing = true;
+  settings.mAecOn = true;
+  aip->ApplySettings(graph, nullptr, settings);
+  aip->Start(graph);
+
+  webrtc::AudioProcessing::Config echoOnlyConfig;
+  echoOnlyConfig.echo_canceller.enabled = true;
+  webrtc::AudioProcessing::Config echoNoiseConfig = echoOnlyConfig;
+  echoNoiseConfig.noise_suppression.enabled = true;
+
+  // Config is applied, and platform processing requested.
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoOnlyConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  // Platform processing params successfully applied.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  // Turns off the equivalent APM config.
+  EXPECT_EQ(aip->AppliedConfig(graph), webrtc::AudioProcessing::Config());
+  EXPECT_TRUE(aip->IsPassThrough(graph));
+
+  // Simulate an error after a driver switch.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION, Err(CUBEB_ERROR));
+  // The APM config is turned back on, and platform processing is requested to
+  // be turned off.
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoOnlyConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  // Pretend there was a response for an old request.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  // It does nothing since we are requesting NONE now.
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoOnlyConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  // Turn it off as requested.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph, CUBEB_INPUT_PROCESSING_PARAM_NONE,
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoOnlyConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  // Test partial support for the requested params.
+  settings.mNoiseOn = true;
+  aip->ApplySettings(graph, nullptr, settings);
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+                CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoNoiseConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+  // Only noise suppression was supported in the platform.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph,
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+          CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION);
+  // In the APM only echo cancellation is applied.
+  EXPECT_EQ(aip->AppliedConfig(graph), echoOnlyConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  // Test error for partial support.
+  aip->NotifySetRequestedInputProcessingParamsResult(
+      graph,
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+          CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+      Err(CUBEB_ERROR));
+  // The full config is applied in the APM, and NONE is requested.
+  EXPECT_EQ(aip->RequestedInputProcessingParams(graph),
+            CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  EXPECT_EQ(aip->AppliedConfig(graph), echoNoiseConfig);
+  EXPECT_FALSE(aip->IsPassThrough(graph));
+
+  aip->Stop(graph);
+  graph->Destroy();
+}
diff --git a/dom/media/gtest/TestAudioInputSource.cpp b/dom/media/gtest/TestAudioInputSource.cpp
index f3f18b26a9..5defd1d053 100644
--- a/dom/media/gtest/TestAudioInputSource.cpp
+++ b/dom/media/gtest/TestAudioInputSource.cpp
@@ -10,16 +10,22 @@
 #include "gtest/gtest.h"
 
 #include "MockCubeb.h"
+#include "mozilla/Result.h"
 #include "mozilla/gtest/WaitFor.h"
 #include "nsContentUtils.h"
 
 using namespace mozilla;
 using testing::ContainerEq;
 
-namespace {
+// Short-hand for DispatchToCurrentThread with a function.
 #define DispatchFunction(f) \
   NS_DispatchToCurrentThread(NS_NewRunnableFunction(__func__, f))
-}  // namespace
+
+// Short-hand for draining the current threads event queue, i.e. processing
+// those runnables dispatched per above.
+#define ProcessEventQueue()                     \
+  while (NS_ProcessNextEvent(nullptr, false)) { \
+  }
 
 class MockEventListener : public AudioInputSource::EventListener {
  public:
@@ -63,7 +69,10 @@ TEST(TestAudioInputSource, StartAndStop)
 
   // Make sure start and stop works.
   {
-    DispatchFunction([&] { ais->Start(); });
+    DispatchFunction([&] {
+      ais->Init();
+      ais->Start();
+    });
     RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
     EXPECT_TRUE(stream->mHasInput);
     EXPECT_FALSE(stream->mHasOutput);
@@ -79,7 +88,10 @@ TEST(TestAudioInputSource, StartAndStop)
 
   // Make sure restart is ok.
   {
-    DispatchFunction([&] { ais->Start(); });
+    DispatchFunction([&] {
+      ais->Init();
+      ais->Start();
+    });
     RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
     EXPECT_TRUE(stream->mHasInput);
     EXPECT_FALSE(stream->mHasOutput);
@@ -133,7 +145,10 @@ TEST(TestAudioInputSource, DataOutputBeforeStartAndAfterStop)
     EXPECT_TRUE(data.IsNull());
   }
 
-  DispatchFunction([&] { ais->Start(); });
+  DispatchFunction([&] {
+    ais->Init();
+    ais->Start();
+  });
   RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream->mHasInput);
   EXPECT_FALSE(stream->mHasOutput);
@@ -206,7 +221,10 @@ TEST(TestAudioInputSource, ErrorCallback)
       sourceRate, targetRate);
   ASSERT_TRUE(ais);
 
-  DispatchFunction([&] { ais->Start(); });
+  DispatchFunction([&] {
+    ais->Init();
+    ais->Start();
+  });
   RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream->mHasInput);
   EXPECT_FALSE(stream->mHasOutput);
@@ -251,7 +269,10 @@ TEST(TestAudioInputSource, DeviceChangedCallback)
       sourceRate, targetRate);
   ASSERT_TRUE(ais);
 
-  DispatchFunction([&] { ais->Start(); });
+  DispatchFunction([&] {
+    ais->Init();
+    ais->Start();
+  });
   RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream->mHasInput);
   EXPECT_FALSE(stream->mHasOutput);
@@ -267,3 +288,82 @@ TEST(TestAudioInputSource, DeviceChangedCallback)
 
   ais = nullptr;  // Drop the SharedThreadPool here.
 }
+
+TEST(TestAudioInputSource, InputProcessing)
+{
+  MockCubeb* cubeb = new MockCubeb();
+  CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
+
+  const AudioInputSource::Id sourceId = 1;
+  const CubebUtils::AudioDeviceID deviceId = (CubebUtils::AudioDeviceID)1;
+  const uint32_t channels = 2;
+  const PrincipalHandle testPrincipal =
+      MakePrincipalHandle(nsContentUtils::GetSystemPrincipal());
+  const TrackRate sourceRate = 44100;
+  const TrackRate targetRate = 48000;
+  using ProcessingPromise =
+      AudioInputSource::SetRequestedProcessingParamsPromise;
+
+  auto listener = MakeRefPtr<MockEventListener>();
+  EXPECT_CALL(*listener,
+              AudioStateCallback(
+                  sourceId, AudioInputSource::EventListener::State::Started))
+      .Times(0);
+  EXPECT_CALL(*listener,
+              AudioStateCallback(
+                  sourceId, AudioInputSource::EventListener::State::Stopped))
+      .Times(10);
+
+  RefPtr<AudioInputSource> ais = MakeRefPtr<AudioInputSource>(
+      std::move(listener), sourceId, deviceId, channels, true, testPrincipal,
+      sourceRate, targetRate);
+
+  const auto test =
+      [&](cubeb_input_processing_params aRequested,
+          const Result<cubeb_input_processing_params, int>& aExpected) {
+        RefPtr<ProcessingPromise> p;
+        DispatchFunction([&] {
+          ais->Init();
+          p = ais->SetRequestedProcessingParams(aRequested);
+        });
+        ProcessEventQueue();
+        EXPECT_EQ(WaitFor(p), aExpected);
+
+        DispatchFunction([&] { ais->Stop(); });
+        Unused << WaitFor(cubeb->StreamDestroyEvent());
+      };
+
+  // Not supported by backend.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_ERROR_NOT_SUPPORTED);
+  test(CUBEB_INPUT_PROCESSING_PARAM_NONE, Err(CUBEB_ERROR_NOT_SUPPORTED));
+
+  // Not supported by params.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_OK);
+  test(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+       CUBEB_INPUT_PROCESSING_PARAM_NONE);
+
+  constexpr cubeb_input_processing_params allParams =
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION |
+      CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL |
+      CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION;
+
+  // Successful all.
+  cubeb->SetSupportedInputProcessingParams(allParams, CUBEB_OK);
+  test(allParams, allParams);
+
+  // Successful partial.
+  test(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+       CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+
+  // Not supported by stream.
+  // Note this also tests that AudioInputSource resets its configured params
+  // state from the previous successful test.
+  constexpr int propagatedError = 99;
+  cubeb->SetInputProcessingApplyRv(propagatedError);
+  test(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION, Err(propagatedError));
+
+  ais = nullptr;  // Drop the SharedThreadPool here.
+}
diff --git a/dom/media/gtest/TestAudioRingBuffer.cpp b/dom/media/gtest/TestAudioRingBuffer.cpp
index 082323efd1..3da39780f1 100644
--- a/dom/media/gtest/TestAudioRingBuffer.cpp
+++ b/dom/media/gtest/TestAudioRingBuffer.cpp
@@ -1094,7 +1094,7 @@ TEST(TestAudioRingBuffer, PrependSilenceNoWrapShort)
   EXPECT_THAT(out, ElementsAre(2, 3, 4, 5, 0, 0, 6, 7));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesNoWrapFloat)
+TEST(TestAudioRingBuffer, EnsureLengthBytesNoWrapFloat)
 {
   AudioRingBuffer rb(6 * sizeof(float));
   rb.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
@@ -1106,7 +1106,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesNoWrapFloat)
   EXPECT_EQ(rb.AvailableWrite(), 0u);
   EXPECT_EQ(rb.Capacity(), 6u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(11 * sizeof(float)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(11 * sizeof(float)));
   float out[10] = {};
   rv = rb.Read(Span(out, 10));
   EXPECT_EQ(rv, 5u);
@@ -1116,7 +1116,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesNoWrapFloat)
   EXPECT_THAT(out, ElementsAre(.1, .2, .3, .4, .5, 0, 0, 0, 0, 0));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesNoWrapShort)
+TEST(TestAudioRingBuffer, EnsureLengthBytesNoWrapShort)
 {
   AudioRingBuffer rb(6 * sizeof(short));
   rb.SetSampleFormat(AUDIO_FORMAT_S16);
@@ -1128,7 +1128,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesNoWrapShort)
   EXPECT_EQ(rb.AvailableWrite(), 0u);
   EXPECT_EQ(rb.Capacity(), 6u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(11 * sizeof(short)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(11 * sizeof(short)));
   short out[10] = {};
   rv = rb.Read(Span(out, 10));
   EXPECT_EQ(rv, 5u);
@@ -1138,7 +1138,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesNoWrapShort)
   EXPECT_THAT(out, ElementsAre(1, 2, 3, 4, 5, 0, 0, 0, 0, 0));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartFloat)
+TEST(TestAudioRingBuffer, EnsureLengthBytesWrap1PartFloat)
 {
   AudioRingBuffer rb(6 * sizeof(float));
   rb.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
@@ -1158,7 +1158,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartFloat)
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 0u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(11 * sizeof(float)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(11 * sizeof(float)));
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 5u);
 
@@ -1175,7 +1175,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartFloat)
   EXPECT_THAT(out, ElementsAre(.1, .2, .3, .4, .5, .6, .7, 0, 0, 0));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartShort)
+TEST(TestAudioRingBuffer, EnsureLengthBytesWrap1PartShort)
 {
   AudioRingBuffer rb(6 * sizeof(short));
   rb.SetSampleFormat(AUDIO_FORMAT_S16);
@@ -1195,7 +1195,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartShort)
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 0u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(11 * sizeof(short)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(11 * sizeof(short)));
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 5u);
 
@@ -1212,7 +1212,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap1PartShort)
   EXPECT_THAT(out, ElementsAre(1, 2, 3, 4, 5, 6, 7, 0, 0, 0));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsFloat)
+TEST(TestAudioRingBuffer, EnsureLengthBytesWrap2PartsFloat)
 {
   AudioRingBuffer rb(6 * sizeof(float));
   rb.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
@@ -1232,7 +1232,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsFloat)
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 0u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(8 * sizeof(float)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(8 * sizeof(float)));
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 2u);
 
@@ -1249,7 +1249,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsFloat)
   EXPECT_THAT(out, ElementsAre(.1, .2, .3, .4, .5, .6, .7, 0));
 }
 
-TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsShort)
+TEST(TestAudioRingBuffer, EnsureLengthBytesWrap2PartsShort)
 {
   AudioRingBuffer rb(6 * sizeof(short));
   rb.SetSampleFormat(AUDIO_FORMAT_S16);
@@ -1269,7 +1269,7 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsShort)
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 0u);
 
-  EXPECT_TRUE(rb.SetLengthBytes(8 * sizeof(short)));
+  EXPECT_TRUE(rb.EnsureLengthBytes(8 * sizeof(short)));
   EXPECT_EQ(rb.AvailableRead(), 5u);
   EXPECT_EQ(rb.AvailableWrite(), 2u);
 
@@ -1285,3 +1285,29 @@ TEST(TestAudioRingBuffer, SetLengthBytesWrap2PartsShort)
   EXPECT_EQ(rb.Capacity(), 8u);
   EXPECT_THAT(out, ElementsAre(1, 2, 3, 4, 5, 6, 7, 0));
 }
+
+TEST(TestAudioRingBuffer, EnsureLengthShorter)
+{
+  AudioRingBuffer rb(5 * sizeof(float));
+  rb.SetSampleFormat(AUDIO_FORMAT_FLOAT32);
+
+  float in[5] = {.1, .2, .3, .4, .5};
+  EXPECT_EQ(rb.Write(Span(in, 5)), 4u);
+  EXPECT_EQ(rb.AvailableRead(), 4u);
+  EXPECT_EQ(rb.AvailableWrite(), 0u);
+  EXPECT_EQ(rb.Capacity(), 5u);
+
+  float out[5] = {};
+  EXPECT_EQ(rb.Read(Span(out, 3)), 3u);
+  EXPECT_THAT(out, ElementsAre(.1, .2, .3, 0, 0));
+  EXPECT_EQ(rb.AvailableRead(), 1u);
+  EXPECT_EQ(rb.AvailableWrite(), 3u);
+
+  EXPECT_TRUE(rb.EnsureLengthBytes(3 * sizeof(float)));
+  EXPECT_EQ(rb.AvailableRead(), 1u);
+  EXPECT_EQ(rb.AvailableWrite(), 3u);
+  EXPECT_EQ(rb.Capacity(), 5u);
+  EXPECT_EQ(rb.Write(Span(in, 5)), 3u);
+  EXPECT_EQ(rb.Read(Span(out, 5)), 4u);
+  EXPECT_THAT(out, ElementsAre(.4, .1, .2, .3, 0));
+}
diff --git a/dom/media/gtest/TestAudioTrackGraph.cpp b/dom/media/gtest/TestAudioTrackGraph.cpp
index 7be1224ab9..b1202277ce 100644
--- a/dom/media/gtest/TestAudioTrackGraph.cpp
+++ b/dom/media/gtest/TestAudioTrackGraph.cpp
@@ -21,9 +21,13 @@
 #include "WavDumper.h"
 
 using namespace mozilla;
+using testing::Eq;
+using testing::InSequence;
+using testing::Return;
+using testing::StrictMock;
 
 // Short-hand for InvokeAsync on the current thread.
-#define Invoke(f) InvokeAsync(GetCurrentSerialEventTarget(), __func__, f)
+#define InvokeAsync(f) InvokeAsync(GetCurrentSerialEventTarget(), __func__, f)
 
 // Short-hand for DispatchToCurrentThread with a function.
 #define DispatchFunction(f) \
@@ -33,6 +37,12 @@ using namespace mozilla;
 #define DispatchMethod(t, m, args...) \
   NS_DispatchToCurrentThread(NewRunnableMethod(__func__, t, m, ##args))
 
+// Short-hand for draining the current threads event queue, i.e. processing
+// those runnables dispatched per above.
+#define ProcessEventQueue()                     \
+  while (NS_ProcessNextEvent(nullptr, false)) { \
+  }
+
 namespace {
 #ifdef MOZ_WEBRTC
 /*
@@ -111,6 +121,44 @@ struct StopNonNativeInput : public ControlMessage {
   void Run() override { mInputTrack->StopAudio(); }
 };
 
+// Helper for detecting when fallback driver has been switched away, for use
+// with RunningMode::Manual.
+class OnFallbackListener : public MediaTrackListener {
+  const RefPtr<MediaTrack> mTrack;
+  Atomic<bool> mOnFallback{true};
+
+ public:
+  explicit OnFallbackListener(MediaTrack* aTrack) : mTrack(aTrack) {}
+
+  void Reset() { mOnFallback = true; }
+  bool OnFallback() { return mOnFallback; }
+
+  void NotifyOutput(MediaTrackGraph*, TrackTime) override {
+    if (auto* ad =
+            mTrack->GraphImpl()->CurrentDriver()->AsAudioCallbackDriver()) {
+      mOnFallback = ad->OnFallback();
+    }
+  }
+};
+
+class MockAudioDataListener : public AudioDataListener {
+ protected:
+  ~MockAudioDataListener() = default;
+
+ public:
+  MockAudioDataListener() = default;
+
+  MOCK_METHOD(uint32_t, RequestedInputChannelCount, (MediaTrackGraph*),
+              (const));
+  MOCK_METHOD(cubeb_input_processing_params, RequestedInputProcessingParams,
+              (MediaTrackGraph*), (const));
+  MOCK_METHOD(bool, IsVoiceInput, (MediaTrackGraph*), (const));
+  MOCK_METHOD(void, DeviceChanged, (MediaTrackGraph*));
+  MOCK_METHOD(void, Disconnect, (MediaTrackGraph*));
+  MOCK_METHOD(void, NotifySetRequestedInputProcessingParamsResult,
+              (MediaTrackGraph*, cubeb_input_processing_params,
+               (const Result<cubeb_input_processing_params, int>&)));
+};
 }  // namespace
 
 /*
@@ -164,7 +212,7 @@ TEST(TestAudioTrackGraph, DifferentDeviceIDs)
     // graph from the global hash table and let it shutdown.
 
     using SourceTrackPromise = MozPromise<SourceMediaTrack*, nsresult, true>;
-    auto p = Invoke([g] {
+    auto p = InvokeAsync([g] {
       return SourceTrackPromise::CreateAndResolve(
           g->CreateSourceTrack(MediaSegment::AUDIO), __func__);
     });
@@ -256,7 +304,7 @@ TEST(TestAudioTrackGraph, NotifyDeviceStarted)
       nullptr, GetMainThreadSerialEventTarget());
 
   RefPtr<SourceMediaTrack> dummySource;
-  Unused << WaitFor(Invoke([&] {
+  Unused << WaitFor(InvokeAsync([&] {
     // Dummy track to make graph rolling. Add it and remove it to remove the
     // graph from the global hash table and let it shutdown.
     dummySource = graph->CreateSourceTrack(MediaSegment::AUDIO);
@@ -522,7 +570,7 @@ TEST(TestAudioTrackGraph, NonNativeInputTrackErrorCallback)
 class TestDeviceInputConsumerTrack : public DeviceInputConsumerTrack {
  public:
   static TestDeviceInputConsumerTrack* Create(MediaTrackGraph* aGraph) {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     TestDeviceInputConsumerTrack* track =
         new TestDeviceInputConsumerTrack(aGraph->GraphRate());
     aGraph->AddTrack(track);
@@ -530,7 +578,7 @@ class TestDeviceInputConsumerTrack : public DeviceInputConsumerTrack {
   }
 
   void Destroy() {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     DisconnectDeviceInput();
     DeviceInputConsumerTrack::Destroy();
   }
@@ -543,7 +591,7 @@ class TestDeviceInputConsumerTrack : public DeviceInputConsumerTrack {
     if (mInputs.IsEmpty()) {
       GetData<AudioSegment>()->AppendNullData(aTo - aFrom);
     } else {
-      MOZ_ASSERT(mInputs.Length() == 1);
+      MOZ_RELEASE_ASSERT(mInputs.Length() == 1);
       AudioSegment data;
       DeviceInputConsumerTrack::GetInputSourceData(data, aFrom, aTo);
       GetData<AudioSegment>()->AppendFrom(&data);
@@ -555,7 +603,7 @@ class TestDeviceInputConsumerTrack : public DeviceInputConsumerTrack {
       return 0;
     }
     DeviceInputTrack* t = mInputs[0]->GetSource()->AsDeviceInputTrack();
-    MOZ_ASSERT(t);
+    MOZ_RELEASE_ASSERT(t);
     return t->NumberOfChannels();
   }
 
@@ -574,30 +622,23 @@ TEST(TestAudioTrackGraph, DeviceChangedCallback)
       CubebUtils::PreferredSampleRate(/* aShouldResistFingerprinting */ false),
       nullptr, GetMainThreadSerialEventTarget());
 
-  class TestAudioDataListener : public AudioDataListener {
+  class TestAudioDataListener : public StrictMock<MockAudioDataListener> {
    public:
-    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice)
-        : mChannelCount(aChannelCount),
-          mIsVoice(aIsVoice),
-          mDeviceChangedCount(0) {}
-
-    uint32_t RequestedInputChannelCount(MediaTrackGraph* aGraph) override {
-      return mChannelCount;
-    }
-    bool IsVoiceInput(MediaTrackGraph* aGraph) const override {
-      return mIsVoice;
-    };
-    void DeviceChanged(MediaTrackGraph* aGraph) override {
-      ++mDeviceChangedCount;
+    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice) {
+      EXPECT_CALL(*this, RequestedInputChannelCount)
+          .WillRepeatedly(Return(aChannelCount));
+      EXPECT_CALL(*this, RequestedInputProcessingParams)
+          .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NONE));
+      EXPECT_CALL(*this, IsVoiceInput).WillRepeatedly(Return(aIsVoice));
+      {
+        InSequence s;
+        EXPECT_CALL(*this, DeviceChanged);
+        EXPECT_CALL(*this, Disconnect);
+      }
     }
-    void Disconnect(MediaTrackGraph* aGraph) override{/* Ignored */};
-    uint32_t DeviceChangedCount() { return mDeviceChangedCount; }
 
    private:
     ~TestAudioDataListener() = default;
-    const uint32_t mChannelCount;
-    const bool mIsVoice;
-    std::atomic<uint32_t> mDeviceChangedCount;
   };
 
   // Create a full-duplex AudioCallbackDriver by creating a NativeInputTrack.
@@ -610,7 +651,7 @@ TEST(TestAudioTrackGraph, DeviceChangedCallback)
   EXPECT_TRUE(track1->ConnectedToNativeDevice());
   EXPECT_FALSE(track1->ConnectedToNonNativeDevice());
   auto started =
-      Invoke([&] { return graphImpl->NotifyWhenDeviceStarted(nullptr); });
+      InvokeAsync([&] { return graphImpl->NotifyWhenDeviceStarted(nullptr); });
   RefPtr<SmartMockCubebStream> stream1 = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream1->mHasInput);
   EXPECT_TRUE(stream1->mHasOutput);
@@ -648,9 +689,6 @@ TEST(TestAudioTrackGraph, DeviceChangedCallback)
       WaitFor(cubeb->StreamDestroyEvent());
   EXPECT_EQ(destroyedStream.get(), stream2.get());
 
-  // Make sure we only have one device-changed event for the NativeInputTrack.
-  EXPECT_EQ(listener2->DeviceChangedCount(), 1U);
-
   // Destroy the NativeInputTrack.
   DispatchFunction([&] {
     track1->DisconnectDeviceInput();
@@ -658,9 +696,6 @@ TEST(TestAudioTrackGraph, DeviceChangedCallback)
   });
   destroyedStream = WaitFor(cubeb->StreamDestroyEvent());
   EXPECT_EQ(destroyedStream.get(), stream1.get());
-
-  // Make sure we only have one device-changed event for the NativeInputTrack.
-  EXPECT_EQ(listener1->DeviceChangedCount(), 1U);
 }
 
 // The native audio stream (a.k.a. GraphDriver) and the non-native audio stream
@@ -692,57 +727,32 @@ TEST(TestAudioTrackGraph, RestartAudioIfMaxChannelCountChanged)
 
   // A test-only AudioDataListener that simulates AudioInputProcessing's setter
   // and getter for the input channel count.
-  class TestAudioDataListener : public AudioDataListener {
+  class TestAudioDataListener : public StrictMock<MockAudioDataListener> {
    public:
-    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice)
-        : mChannelCount(aChannelCount), mIsVoice(aIsVoice) {}
+    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice) {
+      EXPECT_CALL(*this, RequestedInputChannelCount)
+          .WillRepeatedly(Return(aChannelCount));
+      EXPECT_CALL(*this, RequestedInputProcessingParams)
+          .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NONE));
+      EXPECT_CALL(*this, IsVoiceInput).WillRepeatedly(Return(aIsVoice));
+      EXPECT_CALL(*this, Disconnect);
+    }
     // Main thread API
     void SetInputChannelCount(MediaTrackGraph* aGraph,
                               CubebUtils::AudioDeviceID aDevice,
                               uint32_t aChannelCount) {
-      MOZ_ASSERT(NS_IsMainThread());
-
-      struct Message : public ControlMessage {
-        MediaTrackGraph* mGraph;
-        TestAudioDataListener* mListener;
-        CubebUtils::AudioDeviceID mDevice;
-        uint32_t mChannelCount;
-
-        Message(MediaTrackGraph* aGraph, TestAudioDataListener* aListener,
-                CubebUtils::AudioDeviceID aDevice, uint32_t aChannelCount)
-            : ControlMessage(nullptr),
-              mGraph(aGraph),
-              mListener(aListener),
-              mDevice(aDevice),
-              mChannelCount(aChannelCount) {}
-        void Run() override {
-          mListener->mChannelCount = mChannelCount;
-          mGraph->ReevaluateInputDevice(mDevice);
-        }
-      };
-
-      static_cast<MediaTrackGraphImpl*>(aGraph)->AppendMessage(
-          MakeUnique<Message>(aGraph, this, aDevice, aChannelCount));
+      MOZ_RELEASE_ASSERT(NS_IsMainThread());
+      static_cast<MediaTrackGraphImpl*>(aGraph)
+          ->QueueControlMessageWithNoShutdown(
+              [this, self = RefPtr(this), aGraph, aDevice, aChannelCount] {
+                EXPECT_CALL(*this, RequestedInputChannelCount)
+                    .WillRepeatedly(Return(aChannelCount));
+                aGraph->ReevaluateInputDevice(aDevice);
+              });
     }
-    // Graph thread APIs: AudioDataListenerInterface implementations.
-    uint32_t RequestedInputChannelCount(MediaTrackGraph* aGraph) override {
-      aGraph->AssertOnGraphThread();
-      return mChannelCount;
-    }
-    bool IsVoiceInput(MediaTrackGraph* aGraph) const override {
-      return mIsVoice;
-    };
-    void DeviceChanged(MediaTrackGraph* aGraph) override { /* Ignored */
-    }
-    void Disconnect(MediaTrackGraph* aGraph) override{/* Ignored */};
 
    private:
     ~TestAudioDataListener() = default;
-
-    // Graph thread-only.
-    uint32_t mChannelCount;
-    // Any thread.
-    const bool mIsVoice;
   };
 
   // Request a new input channel count and expect to have a new stream.
@@ -841,8 +851,8 @@ TEST(TestAudioTrackGraph, RestartAudioIfMaxChannelCountChanged)
 
     EXPECT_TRUE(track1->ConnectedToNativeDevice());
     EXPECT_FALSE(track1->ConnectedToNonNativeDevice());
-    auto started =
-        Invoke([&] { return graphImpl->NotifyWhenDeviceStarted(nullptr); });
+    auto started = InvokeAsync(
+        [&] { return graphImpl->NotifyWhenDeviceStarted(nullptr); });
     nativeStream = WaitFor(cubeb->StreamInitEvent());
     EXPECT_TRUE(nativeStream->mHasInput);
     EXPECT_TRUE(nativeStream->mHasOutput);
@@ -947,30 +957,18 @@ TEST(TestAudioTrackGraph, RestartAudioIfMaxChannelCountChanged)
 // AudioDataListener. However, it only tests when MOZ_WEBRTC is defined.
 TEST(TestAudioTrackGraph, SwitchNativeInputDevice)
 {
-  class TestAudioDataListener : public AudioDataListener {
+  class TestAudioDataListener : public StrictMock<MockAudioDataListener> {
    public:
-    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice)
-        : mChannelCount(aChannelCount),
-          mIsVoice(aIsVoice),
-          mDeviceChangedCount(0) {}
-
-    uint32_t RequestedInputChannelCount(MediaTrackGraph* aGraph) override {
-      return mChannelCount;
-    }
-    bool IsVoiceInput(MediaTrackGraph* aGraph) const override {
-      return mIsVoice;
-    };
-    void DeviceChanged(MediaTrackGraph* aGraph) override {
-      ++mDeviceChangedCount;
+    TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice) {
+      EXPECT_CALL(*this, RequestedInputChannelCount)
+          .WillRepeatedly(Return(aChannelCount));
+      EXPECT_CALL(*this, RequestedInputProcessingParams)
+          .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NONE));
+      EXPECT_CALL(*this, IsVoiceInput).WillRepeatedly(Return(aIsVoice));
     }
-    void Disconnect(MediaTrackGraph* aGraph) override{/* Ignored */};
-    uint32_t DeviceChangedCount() { return mDeviceChangedCount; }
 
    private:
     ~TestAudioDataListener() = default;
-    const uint32_t mChannelCount;
-    const bool mIsVoice;
-    std::atomic<uint32_t> mDeviceChangedCount;
   };
 
   MockCubeb* cubeb = new MockCubeb();
@@ -1049,11 +1047,12 @@ TEST(TestAudioTrackGraph, SwitchNativeInputDevice)
   RefPtr<TestDeviceInputConsumerTrack> track1 =
       TestDeviceInputConsumerTrack::Create(graph);
   RefPtr<TestAudioDataListener> listener1 = new TestAudioDataListener(1, false);
+  EXPECT_CALL(*listener1, Disconnect);
   track1->ConnectDeviceInput(device1, listener1, PRINCIPAL_HANDLE_NONE);
   EXPECT_EQ(track1->DeviceId().value(), device1);
 
   auto started =
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
+      InvokeAsync([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
 
   RefPtr<SmartMockCubebStream> stream1 = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream1->mHasInput);
@@ -1069,6 +1068,7 @@ TEST(TestAudioTrackGraph, SwitchNativeInputDevice)
   RefPtr<TestDeviceInputConsumerTrack> track2 =
       TestDeviceInputConsumerTrack::Create(graph);
   RefPtr<TestAudioDataListener> listener2 = new TestAudioDataListener(2, false);
+  EXPECT_CALL(*listener2, Disconnect).Times(2);
   track2->ConnectDeviceInput(device2, listener2, PRINCIPAL_HANDLE_NONE);
   EXPECT_EQ(track2->DeviceId().value(), device2);
 
@@ -1085,6 +1085,7 @@ TEST(TestAudioTrackGraph, SwitchNativeInputDevice)
   RefPtr<TestDeviceInputConsumerTrack> track3 =
       TestDeviceInputConsumerTrack::Create(graph);
   RefPtr<TestAudioDataListener> listener3 = new TestAudioDataListener(1, false);
+  EXPECT_CALL(*listener3, Disconnect).Times(2);
   track3->ConnectDeviceInput(device3, listener3, PRINCIPAL_HANDLE_NONE);
   EXPECT_EQ(track3->DeviceId().value(), device3);
 
@@ -1160,7 +1161,7 @@ TEST(TestAudioTrackGraph, ErrorCallback)
   // output from the graph.
   RefPtr<AudioProcessingTrack> processingTrack;
   RefPtr<AudioInputProcessing> listener;
-  auto started = Invoke([&] {
+  auto started = InvokeAsync([&] {
     processingTrack = AudioProcessingTrack::Create(graph);
     listener = new AudioInputProcessing(2);
     QueueExpectIsPassThrough(processingTrack, listener);
@@ -1225,7 +1226,7 @@ TEST(TestAudioTrackGraph, AudioProcessingTrack)
   RefPtr<ProcessedMediaTrack> outputTrack;
   RefPtr<MediaInputPort> port;
   RefPtr<AudioInputProcessing> listener;
-  auto p = Invoke([&] {
+  auto p = InvokeAsync([&] {
     processingTrack = AudioProcessingTrack::Create(graph);
     outputTrack = graph->CreateForwardedInputTrack(MediaSegment::AUDIO);
     outputTrack->QueueSetAutoend(false);
@@ -1282,7 +1283,7 @@ TEST(TestAudioTrackGraph, AudioProcessingTrack)
 
   EXPECT_EQ(estimatedFreq, inputFrequency);
   std::cerr << "PreSilence: " << preSilenceSamples << std::endl;
-  // We buffer 128 frames. See DeviceInputTrack::ProcessInput.
+  // We buffer 128 frames. See NativeInputTrack::NotifyInputData.
   EXPECT_GE(preSilenceSamples, 128U);
   // If the fallback system clock driver is doing a graph iteration before the
   // first audio driver iteration comes in, that iteration is ignored and
@@ -1297,13 +1298,17 @@ TEST(TestAudioTrackGraph, AudioProcessingTrack)
 
 TEST(TestAudioTrackGraph, ReConnectDeviceInput)
 {
-  MockCubeb* cubeb = new MockCubeb();
+  MockCubeb* cubeb = new MockCubeb(MockCubeb::RunningMode::Manual);
   CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
 
   // 48k is a native processing rate, and avoids a resampling pass compared
   // to 44.1k. The resampler may add take a few frames to stabilize, which show
   // as unexected discontinuities in the test.
   const TrackRate rate = 48000;
+  // Use a drift factor so that we don't dont produce perfect 10ms-chunks.
+  // This will exercise whatever buffers are in the audio processing pipeline,
+  // and the bookkeeping surrounding them.
+  const long step = 10 * rate * 1111 / 1000 / PR_MSEC_PER_SEC;
 
   MediaTrackGraph* graph = MediaTrackGraphImpl::GetInstance(
       MediaTrackGraph::SYSTEM_THREAD_DRIVER, /*Window ID*/ 1, rate, nullptr,
@@ -1315,7 +1320,8 @@ TEST(TestAudioTrackGraph, ReConnectDeviceInput)
   RefPtr<ProcessedMediaTrack> outputTrack;
   RefPtr<MediaInputPort> port;
   RefPtr<AudioInputProcessing> listener;
-  auto p = Invoke([&] {
+  RefPtr<OnFallbackListener> fallbackListener;
+  DispatchFunction([&] {
     processingTrack = AudioProcessingTrack::Create(graph);
     outputTrack = graph->CreateForwardedInputTrack(MediaSegment::AUDIO);
     outputTrack->QueueSetAutoend(false);
@@ -1337,54 +1343,65 @@ TEST(TestAudioTrackGraph, ReConnectDeviceInput)
     settings.mAgc2Forced = true;
     QueueApplySettings(processingTrack, listener, settings);
 
-    return graph->NotifyWhenDeviceStarted(nullptr);
+    fallbackListener = new OnFallbackListener(processingTrack);
+    processingTrack->AddListener(fallbackListener);
   });
 
   RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream->mHasInput);
-  Unused << WaitFor(p);
 
-  // Set a drift factor so that we don't dont produce perfect 10ms-chunks. This
-  // will exercise whatever buffers are in the audio processing pipeline, and
-  // the bookkeeping surrounding them.
-  stream->SetDriftFactor(1.111);
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
 
-  // Wait for a second worth of audio data. GoFaster is dispatched through a
-  // ControlMessage so that it is called in the first audio driver iteration.
-  // Otherwise the audio driver might be going very fast while the fallback
-  // system clock driver is still in an iteration.
-  DispatchFunction([&] {
-    processingTrack->GraphImpl()->AppendMessage(MakeUnique<GoFaster>(cubeb));
-  });
-  {
-    uint32_t totalFrames = 0;
-    WaitUntil(stream->FramesProcessedEvent(), [&](uint32_t aFrames) {
-      totalFrames += aFrames;
-      return totalFrames > static_cast<uint32_t>(graph->GraphRate());
-    });
+  // Wait for the AudioCallbackDriver to come into effect.
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Iterate for a second worth of audio data.
+  for (long frames = 0; frames < graph->GraphRate(); frames += step) {
+    stream->ManualDataCallback(step);
   }
-  cubeb->DontGoFaster();
 
   // Close the input to see that no asserts go off due to bad state.
   DispatchFunction([&] { processingTrack->DisconnectDeviceInput(); });
 
-  stream = WaitFor(cubeb->StreamInitEvent());
+  // Dispatch the disconnect message.
+  ProcessEventQueue();
+  // Run the disconnect message.
+  EXPECT_EQ(stream->ManualDataCallback(0),
+            MockCubebStream::KeepProcessing::Yes);
+  // Switch driver.
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
+  EXPECT_EQ(stream->ManualDataCallback(0), MockCubebStream::KeepProcessing::No);
+  std::tie(stream) = WaitFor(initPromise).unwrap()[0];
   EXPECT_FALSE(stream->mHasInput);
-  Unused << WaitFor(
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); }));
 
-  // Output-only. Wait for another second before unmuting.
-  DispatchFunction([&] {
-    processingTrack->GraphImpl()->AppendMessage(MakeUnique<GoFaster>(cubeb));
-  });
-  {
-    uint32_t totalFrames = 0;
-    WaitUntil(stream->FramesProcessedEvent(), [&](uint32_t aFrames) {
-      totalFrames += aFrames;
-      return totalFrames > static_cast<uint32_t>(graph->GraphRate());
-    });
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the new AudioCallbackDriver to come into effect.
+  fallbackListener->Reset();
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Output-only. Iterate for another second before unmuting.
+  for (long frames = 0; frames < graph->GraphRate(); frames += step) {
+    stream->ManualDataCallback(step);
   }
-  cubeb->DontGoFaster();
 
   // Re-open the input to again see that no asserts go off due to bad state.
   DispatchFunction([&] {
@@ -1392,27 +1409,40 @@ TEST(TestAudioTrackGraph, ReConnectDeviceInput)
     processingTrack->ConnectDeviceInput(deviceId, listener,
                                         PRINCIPAL_HANDLE_NONE);
   });
-
-  stream = WaitFor(cubeb->StreamInitEvent());
+  // Dispatch the connect message.
+  ProcessEventQueue();
+  // Run the connect message.
+  EXPECT_EQ(stream->ManualDataCallback(0),
+            MockCubebStream::KeepProcessing::Yes);
+  // Switch driver.
+  initPromise = TakeN(cubeb->StreamInitEvent(), 1);
+  EXPECT_EQ(stream->ManualDataCallback(0), MockCubebStream::KeepProcessing::No);
+  std::tie(stream) = WaitFor(initPromise).unwrap()[0];
   EXPECT_TRUE(stream->mHasInput);
-  Unused << WaitFor(
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); }));
 
-  // Full-duplex. Wait for another second before finishing.
-  DispatchFunction([&] {
-    processingTrack->GraphImpl()->AppendMessage(MakeUnique<GoFaster>(cubeb));
-  });
-  {
-    uint32_t totalFrames = 0;
-    WaitUntil(stream->FramesProcessedEvent(), [&](uint32_t aFrames) {
-      totalFrames += aFrames;
-      return totalFrames > static_cast<uint32_t>(graph->GraphRate());
-    });
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the new AudioCallbackDriver to come into effect.
+  fallbackListener->Reset();
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Full-duplex. Iterate for another second before finishing.
+  for (long frames = 0; frames < graph->GraphRate(); frames += step) {
+    stream->ManualDataCallback(step);
   }
-  cubeb->DontGoFaster();
 
   // Clean up.
   DispatchFunction([&] {
+    processingTrack->RemoveListener(fallbackListener);
     outputTrack->RemoveAudioOutput((void*)1);
     outputTrack->Destroy();
     port->Destroy();
@@ -1422,7 +1452,14 @@ TEST(TestAudioTrackGraph, ReConnectDeviceInput)
     processingTrack->Destroy();
   });
 
-  uint32_t inputRate = stream->SampleRate();
+  // Dispatch the clean-up messages.
+  ProcessEventQueue();
+  // Run the clean-up messages.
+  EXPECT_EQ(stream->ManualDataCallback(0),
+            MockCubebStream::KeepProcessing::Yes);
+  // Shut down driver.
+  EXPECT_EQ(stream->ManualDataCallback(0), MockCubebStream::KeepProcessing::No);
+
   uint32_t inputFrequency = stream->InputFrequency();
   uint64_t preSilenceSamples;
   uint32_t estimatedFreq;
@@ -1431,17 +1468,12 @@ TEST(TestAudioTrackGraph, ReConnectDeviceInput)
       WaitFor(stream->OutputVerificationEvent());
 
   EXPECT_EQ(estimatedFreq, inputFrequency);
-  std::cerr << "PreSilence: " << preSilenceSamples << std::endl;
-  // We buffer 10ms worth of frames in non-passthrough mode, plus up to 128
-  // frames as we round up to the nearest block. See
-  // AudioInputProcessing::Process and DeviceInputTrack::PrcoessInput.
-  EXPECT_GE(preSilenceSamples, 128U + inputRate / 100);
-  // If the fallback system clock driver is doing a graph iteration before the
-  // first audio driver iteration comes in, that iteration is ignored and
-  // results in zeros. It takes one fallback driver iteration *after* the audio
-  // driver has started to complete the switch, *usually* resulting two
-  // 10ms-iterations of silence; sometimes only one.
-  EXPECT_LE(preSilenceSamples, 128U + 3 * inputRate / 100 /* 3*10ms */);
+  std::cerr << "PreSilence: " << preSilenceSamples << "\n";
+  // We buffer 128 frames. See NativeInputTrack::NotifyInputData.
+  // When not in passthrough the AudioInputProcessing packetizer also buffers
+  // 10ms of silence, pulled in from NativeInputTrack when being run by the
+  // fallback SystemClockDriver.
+  EXPECT_EQ(preSilenceSamples, WEBAUDIO_BLOCK_SIZE + rate / 100);
   // The waveform from AudioGenerator starts at 0, but we don't control its
   // ending, so we expect a discontinuity there. Note that this check is only
   // for the waveform on the stream *after* re-opening the input.
@@ -1467,7 +1499,7 @@ float rmsf32(AudioDataValue* aSamples, uint32_t aChannels, uint32_t aFrames) {
 
 TEST(TestAudioTrackGraph, AudioProcessingTrackDisabling)
 {
-  MockCubeb* cubeb = new MockCubeb();
+  MockCubeb* cubeb = new MockCubeb(MockCubeb::RunningMode::Manual);
   CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
 
   MediaTrackGraph* graph = MediaTrackGraphImpl::GetInstance(
@@ -1481,7 +1513,8 @@ TEST(TestAudioTrackGraph, AudioProcessingTrackDisabling)
   RefPtr<ProcessedMediaTrack> outputTrack;
   RefPtr<MediaInputPort> port;
   RefPtr<AudioInputProcessing> listener;
-  auto p = Invoke([&] {
+  RefPtr<OnFallbackListener> fallbackListener;
+  DispatchFunction([&] {
     processingTrack = AudioProcessingTrack::Create(graph);
     outputTrack = graph->CreateForwardedInputTrack(MediaSegment::AUDIO);
     outputTrack->QueueSetAutoend(false);
@@ -1495,32 +1528,36 @@ TEST(TestAudioTrackGraph, AudioProcessingTrackDisabling)
                                         PRINCIPAL_HANDLE_NONE);
     processingTrack->GraphImpl()->AppendMessage(
         MakeUnique<StartInputProcessing>(processingTrack, listener));
-    return graph->NotifyWhenDeviceStarted(nullptr);
+    fallbackListener = new OnFallbackListener(processingTrack);
+    processingTrack->AddListener(fallbackListener);
   });
 
+  ProcessEventQueue();
+
   RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream->mHasInput);
-  Unused << WaitFor(p);
+
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the AudioCallbackDriver to come into effect.
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
 
   stream->SetOutputRecordingEnabled(true);
 
   // Wait for a second worth of audio data.
-  uint64_t targetPosition = graph->GraphRate();
-  auto AdvanceToTargetPosition = [&] {
-    DispatchFunction([&] {
-      processingTrack->GraphImpl()->AppendMessage(MakeUnique<GoFaster>(cubeb));
-    });
-    WaitUntil(stream->FramesProcessedEvent(), [&](uint32_t aFrames) {
-      // Position() gives a more up-to-date indication than summing aFrames if
-      // multiple events are queued.
-      if (stream->Position() < targetPosition) {
-        return false;
-      }
-      cubeb->DontGoFaster();
-      return true;
-    });
-  };
-  AdvanceToTargetPosition();
+  const long step = graph->GraphRate() / 100;  // 10ms
+  for (long frames = 0; frames < graph->GraphRate(); frames += step) {
+    stream->ManualDataCallback(step);
+  }
 
   const uint32_t ITERATION_COUNT = 5;
   uint32_t iterations = ITERATION_COUNT;
@@ -1537,8 +1574,11 @@ TEST(TestAudioTrackGraph, AudioProcessingTrackDisabling)
       }
     });
 
-    targetPosition += graph->GraphRate();
-    AdvanceToTargetPosition();
+    ProcessEventQueue();
+
+    for (long frames = 0; frames < graph->GraphRate(); frames += step) {
+      stream->ManualDataCallback(step);
+    }
   }
 
   // Clean up.
@@ -1548,10 +1588,18 @@ TEST(TestAudioTrackGraph, AudioProcessingTrackDisabling)
     port->Destroy();
     processingTrack->GraphImpl()->AppendMessage(
         MakeUnique<StopInputProcessing>(processingTrack, listener));
+    processingTrack->RemoveListener(fallbackListener);
     processingTrack->DisconnectDeviceInput();
     processingTrack->Destroy();
   });
 
+  ProcessEventQueue();
+
+  // Close the input and switch driver.
+  while (stream->ManualDataCallback(0) != MockCubebStream::KeepProcessing::No) {
+    std::cerr << "Waiting for switch...\n";
+  }
+
   uint64_t preSilenceSamples;
   uint32_t estimatedFreq;
   uint32_t nrDiscontinuities;
@@ -1604,7 +1652,7 @@ TEST(TestAudioTrackGraph, SetRequestedInputChannelCount)
   EXPECT_EQ(track1->DeviceId().value(), device1);
 
   auto started =
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
+      InvokeAsync([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
 
   RefPtr<SmartMockCubebStream> stream1 = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream1->mHasInput);
@@ -1829,7 +1877,7 @@ TEST(TestAudioTrackGraph, RestartAudioIfProcessingMaxChannelCountChanged)
     EXPECT_EQ(track1->DeviceId().value(), nativeDevice);
 
     auto started =
-        Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
+        InvokeAsync([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
 
     nativeStream = WaitFor(cubeb->StreamInitEvent());
     EXPECT_TRUE(nativeStream->mHasInput);
@@ -1961,44 +2009,23 @@ TEST(TestAudioTrackGraph, SetInputChannelCountBeforeAudioCallbackDriver)
   const CubebUtils::AudioDeviceID deviceId = (CubebUtils::AudioDeviceID)1;
   RefPtr<AudioProcessingTrack> track;
   RefPtr<AudioInputProcessing> listener;
-  {
-    MozPromiseHolder<GenericPromise> h;
-    RefPtr<GenericPromise> p = h.Ensure(__func__);
-
-    struct GuardMessage : public ControlMessage {
-      MozPromiseHolder<GenericPromise> mHolder;
-
-      GuardMessage(MediaTrack* aTrack,
-                   MozPromiseHolder<GenericPromise>&& aHolder)
-          : ControlMessage(aTrack), mHolder(std::move(aHolder)) {}
-      void Run() override {
-        mTrack->GraphImpl()->Dispatch(NS_NewRunnableFunction(
-            "TestAudioTrackGraph::SetInputChannel::Message::Resolver",
-            [holder = std::move(mHolder)]() mutable {
-              holder.Resolve(true, __func__);
-            }));
-      }
-    };
-
-    DispatchFunction([&] {
-      track = AudioProcessingTrack::Create(graph);
-      listener = new AudioInputProcessing(2);
-      QueueExpectIsPassThrough(track, listener);
-      track->SetInputProcessing(listener);
-
-      MediaEnginePrefs settings;
-      settings.mChannels = 1;
-      QueueApplySettings(track, listener, settings);
+  DispatchFunction([&] {
+    track = AudioProcessingTrack::Create(graph);
+    listener = new AudioInputProcessing(2);
+    QueueExpectIsPassThrough(track, listener);
+    track->SetInputProcessing(listener);
 
-      track->GraphImpl()->AppendMessage(
-          MakeUnique<GuardMessage>(track, std::move(h)));
-    });
+    MediaEnginePrefs settings;
+    settings.mChannels = 1;
+    QueueApplySettings(track, listener, settings);
+  });
 
-    Unused << WaitFor(p);
-  }
+  // Wait for AudioCallbackDriver to init output-only stream.
+  RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
+  EXPECT_FALSE(stream->mHasInput);
+  EXPECT_TRUE(stream->mHasOutput);
 
   // Open a full-duplex AudioCallbackDriver.
-
   RefPtr<MediaInputPort> port;
   DispatchFunction([&] {
     track->GraphImpl()->AppendMessage(
@@ -2006,22 +2033,13 @@ TEST(TestAudioTrackGraph, SetInputChannelCountBeforeAudioCallbackDriver)
     track->ConnectDeviceInput(deviceId, listener, PRINCIPAL_HANDLE_NONE);
   });
 
-  // MediaTrackGraph will create a output-only AudioCallbackDriver in
-  // CheckDriver before we open an audio input above, since AudioProcessingTrack
-  // is a audio-type MediaTrack, so we need to wait here until the duplex
-  // AudioCallbackDriver is created.
-  RefPtr<SmartMockCubebStream> stream;
-  SpinEventLoopUntil<ProcessFailureBehavior::IgnoreAndContinue>(
-      "TEST(TestAudioTrackGraph, SetInputChannelCountBeforeAudioCallbackDriver)"_ns,
-      [&] {
-        stream = WaitFor(cubeb->StreamInitEvent());
-        EXPECT_TRUE(stream->mHasOutput);
-        return stream->mHasInput;
-      });
+  stream = WaitFor(cubeb->StreamInitEvent());
+  EXPECT_TRUE(stream->mHasInput);
+  EXPECT_TRUE(stream->mHasOutput);
   EXPECT_EQ(stream->InputChannels(), 1U);
 
   Unused << WaitFor(
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); }));
+      InvokeAsync([&] { return graph->NotifyWhenDeviceStarted(nullptr); }));
 
   // Clean up.
   DispatchFunction([&] {
@@ -2257,7 +2275,7 @@ TEST(TestAudioTrackGraph, SwitchNativeAudioProcessingTrack)
   EXPECT_EQ(track1->DeviceId().value(), device1);
 
   auto started =
-      Invoke([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
+      InvokeAsync([&] { return graph->NotifyWhenDeviceStarted(nullptr); });
 
   RefPtr<SmartMockCubebStream> stream1 = WaitFor(cubeb->StreamInitEvent());
   EXPECT_TRUE(stream1->mHasInput);
@@ -2350,23 +2368,6 @@ TEST(TestAudioTrackGraph, SwitchNativeAudioProcessingTrack)
   std::cerr << "No native input now" << std::endl;
 }
 
-class OnFallbackListener : public MediaTrackListener {
-  const RefPtr<MediaTrack> mTrack;
-  Atomic<bool> mOnFallback{true};
-
- public:
-  explicit OnFallbackListener(MediaTrack* aTrack) : mTrack(aTrack) {}
-
-  bool OnFallback() { return mOnFallback; }
-
-  void NotifyOutput(MediaTrackGraph*, TrackTime) override {
-    if (auto* ad =
-            mTrack->GraphImpl()->CurrentDriver()->AsAudioCallbackDriver()) {
-      mOnFallback = ad->OnFallback();
-    }
-  }
-};
-
 void TestCrossGraphPort(uint32_t aInputRate, uint32_t aOutputRate,
                         float aDriftFactor, uint32_t aRunTimeSeconds = 10,
                         uint32_t aNumExpectedUnderruns = 0) {
@@ -2409,6 +2410,13 @@ void TestCrossGraphPort(uint32_t aInputRate, uint32_t aOutputRate,
 
   RefPtr<SmartMockCubebStream> inputStream = WaitFor(cubeb->StreamInitEvent());
 
+  while (
+      inputStream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
   // Wait for the primary AudioCallbackDriver to come into effect.
   while (primaryFallbackListener->OnFallback()) {
     EXPECT_EQ(inputStream->ManualDataCallback(0),
@@ -2441,6 +2449,13 @@ void TestCrossGraphPort(uint32_t aInputRate, uint32_t aOutputRate,
   RefPtr<SmartMockCubebStream> partnerStream =
       WaitFor(cubeb->StreamInitEvent());
 
+  while (
+      partnerStream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
   // Process the CrossGraphTransmitter on the primary graph.
   EXPECT_EQ(inputStream->ManualDataCallback(0),
             MockCubebStream::KeepProcessing::Yes);
@@ -2453,8 +2468,7 @@ void TestCrossGraphPort(uint32_t aInputRate, uint32_t aOutputRate,
   }
 
   DispatchFunction([&] { receiver->RemoveListener(partnerFallbackListener); });
-  while (NS_ProcessNextEvent(nullptr, false)) {
-  }
+  ProcessEventQueue();
 
   nsIThread* currentThread = NS_GetCurrentThread();
   cubeb_state inputState = CUBEB_STATE_STARTED;
@@ -2499,8 +2513,7 @@ void TestCrossGraphPort(uint32_t aInputRate, uint32_t aOutputRate,
     processingTrack->Destroy();
   });
 
-  while (NS_ProcessNextEvent(nullptr, false)) {
-  }
+  ProcessEventQueue();
 
   EXPECT_EQ(inputStream->ManualDataCallback(0),
             MockCubebStream::KeepProcessing::Yes);
@@ -2816,6 +2829,221 @@ TEST(TestAudioInputProcessing, ClockDriftExpectation)
 }
 #endif  // MOZ_WEBRTC
 
+TEST(TestAudioTrackGraph, PlatformProcessing)
+{
+  constexpr cubeb_input_processing_params allParams =
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION |
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION |
+      CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL |
+      CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION;
+  MockCubeb* cubeb = new MockCubeb(MockCubeb::RunningMode::Manual);
+  cubeb->SetSupportedInputProcessingParams(allParams, CUBEB_OK);
+  CubebUtils::ForceSetCubebContext(cubeb->AsCubebContext());
+
+  MediaTrackGraph* graph = MediaTrackGraphImpl::GetInstance(
+      MediaTrackGraph::SYSTEM_THREAD_DRIVER, /*Window ID*/ 1,
+      CubebUtils::PreferredSampleRate(/* aShouldResistFingerprinting */ false),
+      nullptr, GetMainThreadSerialEventTarget());
+
+  const CubebUtils::AudioDeviceID device = (CubebUtils::AudioDeviceID)1;
+
+  // Set up mock listener.
+  RefPtr<MockAudioDataListener> listener = MakeRefPtr<MockAudioDataListener>();
+  EXPECT_CALL(*listener, IsVoiceInput).WillRepeatedly(Return(true));
+  EXPECT_CALL(*listener, RequestedInputChannelCount).WillRepeatedly(Return(1));
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION));
+  EXPECT_CALL(*listener, Disconnect);
+
+  // Expectations.
+  const Result<cubeb_input_processing_params, int> notSupportedResult(
+      Err(CUBEB_ERROR_NOT_SUPPORTED));
+  const Result<cubeb_input_processing_params, int> errorResult(
+      Err(CUBEB_ERROR));
+  const Result<cubeb_input_processing_params, int> noneResult(
+      CUBEB_INPUT_PROCESSING_PARAM_NONE);
+  const Result<cubeb_input_processing_params, int> echoResult(
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION);
+  const Result<cubeb_input_processing_params, int> noiseResult(
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION);
+  Atomic<int> numProcessingParamsResults(0);
+  {
+    InSequence s;
+    // On first driver start.
+    EXPECT_CALL(*listener,
+                NotifySetRequestedInputProcessingParamsResult(
+                    graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                    Eq(std::ref(echoResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After requesting something else.
+    EXPECT_CALL(*listener,
+                NotifySetRequestedInputProcessingParamsResult(
+                    graph, CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+                    Eq(std::ref(noiseResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After error request.
+    EXPECT_CALL(*listener,
+                NotifySetRequestedInputProcessingParamsResult(
+                    graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                    Eq(std::ref(errorResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After requesting None.
+    EXPECT_CALL(*listener, NotifySetRequestedInputProcessingParamsResult(
+                               graph, CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                               Eq(std::ref(noneResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After driver switch.
+    EXPECT_CALL(*listener, NotifySetRequestedInputProcessingParamsResult(
+                               graph, CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                               Eq(std::ref(noneResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After requesting something not supported.
+    EXPECT_CALL(*listener,
+                NotifySetRequestedInputProcessingParamsResult(
+                    graph, CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION,
+                    Eq(std::ref(noneResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+    // After requesting something with backend not supporting processing params.
+    EXPECT_CALL(*listener,
+                NotifySetRequestedInputProcessingParamsResult(
+                    graph, CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION,
+                    Eq(std::ref(notSupportedResult))))
+        .WillOnce([&] { ++numProcessingParamsResults; });
+  }
+
+  // Open a device.
+  RefPtr<TestDeviceInputConsumerTrack> track;
+  RefPtr<OnFallbackListener> fallbackListener;
+  DispatchFunction([&] {
+    track = TestDeviceInputConsumerTrack::Create(graph);
+    track->ConnectDeviceInput(device, listener, PRINCIPAL_HANDLE_NONE);
+    fallbackListener = new OnFallbackListener(track);
+    track->AddListener(fallbackListener);
+  });
+
+  RefPtr<SmartMockCubebStream> stream = WaitFor(cubeb->StreamInitEvent());
+  EXPECT_TRUE(stream->mHasInput);
+  EXPECT_TRUE(stream->mHasOutput);
+  EXPECT_EQ(stream->InputChannels(), 1U);
+  EXPECT_EQ(stream->GetInputDeviceID(), device);
+
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  const auto waitForResult = [&](int aNumResult) {
+    while (numProcessingParamsResults < aNumResult) {
+      EXPECT_EQ(stream->ManualDataCallback(0),
+                MockCubebStream::KeepProcessing::Yes);
+      NS_ProcessNextEvent();
+      std::this_thread::sleep_for(std::chrono::milliseconds(1));
+    }
+  };
+
+  // Wait for the AudioCallbackDriver to come into effect.
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the first result after driver creation.
+  waitForResult(1);
+
+  // Request new processing params.
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION));
+  waitForResult(2);
+
+  // Test with returning error on new request.
+  cubeb->SetInputProcessingApplyRv(CUBEB_ERROR);
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION));
+  waitForResult(3);
+
+  // Test unsetting all params.
+  cubeb->SetInputProcessingApplyRv(CUBEB_OK);
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NONE));
+  waitForResult(4);
+
+  // Switch driver.
+  EXPECT_CALL(*listener, RequestedInputChannelCount).WillRepeatedly(Return(2));
+  DispatchFunction([&] {
+    track->QueueControlMessageWithNoShutdown(
+        [&] { graph->ReevaluateInputDevice(device); });
+  });
+  ProcessEventQueue();
+  // Process the reevaluation message.
+  EXPECT_EQ(stream->ManualDataCallback(0),
+            MockCubebStream::KeepProcessing::Yes);
+  // Perform the switch.
+  auto initPromise = TakeN(cubeb->StreamInitEvent(), 1);
+  EXPECT_EQ(stream->ManualDataCallback(0), MockCubebStream::KeepProcessing::No);
+  std::tie(stream) = WaitFor(initPromise).unwrap()[0];
+  EXPECT_TRUE(stream->mHasInput);
+  EXPECT_TRUE(stream->mHasOutput);
+  EXPECT_EQ(stream->InputChannels(), 2U);
+  EXPECT_EQ(stream->GetInputDeviceID(), device);
+
+  while (
+      stream->State()
+          .map([](cubeb_state aState) { return aState != CUBEB_STATE_STARTED; })
+          .valueOr(true)) {
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the new AudioCallbackDriver to come into effect.
+  fallbackListener->Reset();
+  while (fallbackListener->OnFallback()) {
+    EXPECT_EQ(stream->ManualDataCallback(0),
+              MockCubebStream::KeepProcessing::Yes);
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+  }
+
+  // Wait for the first result after driver creation.
+  waitForResult(5);
+
+  // Test requesting something not supported.
+  cubeb->SetSupportedInputProcessingParams(
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION |
+          CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL |
+          CUBEB_INPUT_PROCESSING_PARAM_VOICE_ISOLATION,
+      CUBEB_OK);
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION));
+  waitForResult(6);
+
+  // Test requesting something when unsupported by backend.
+  cubeb->SetSupportedInputProcessingParams(CUBEB_INPUT_PROCESSING_PARAM_NONE,
+                                           CUBEB_ERROR_NOT_SUPPORTED);
+  EXPECT_CALL(*listener, RequestedInputProcessingParams)
+      .WillRepeatedly(Return(CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION));
+  waitForResult(7);
+
+  // Clean up.
+  DispatchFunction([&] {
+    track->RemoveListener(fallbackListener);
+    track->Destroy();
+  });
+  ProcessEventQueue();
+  // Process the destroy message.
+  EXPECT_EQ(stream->ManualDataCallback(0),
+            MockCubebStream::KeepProcessing::Yes);
+  // Shut down.
+  EXPECT_EQ(stream->ManualDataCallback(0), MockCubebStream::KeepProcessing::No);
+  RefPtr<SmartMockCubebStream> destroyedStream =
+      WaitFor(cubeb->StreamDestroyEvent());
+  EXPECT_EQ(destroyedStream.get(), stream.get());
+  {
+    NativeInputTrack* native = graph->GetNativeInputTrackMainThread();
+    ASSERT_TRUE(!native);
+  }
+}
+
 #undef Invoke
 #undef DispatchFunction
 #undef DispatchMethod
diff --git a/dom/media/gtest/TestCDMStorage.cpp b/dom/media/gtest/TestCDMStorage.cpp
index d6249cc95f..57bbbd9298 100644
--- a/dom/media/gtest/TestCDMStorage.cpp
+++ b/dom/media/gtest/TestCDMStorage.cpp
@@ -58,7 +58,7 @@ template <typename T>
 static nsresult EnumerateCDMStorageDir(const nsACString& aDir, T&& aDirIter) {
   RefPtr<GeckoMediaPluginServiceParent> service =
       GeckoMediaPluginServiceParent::GetSingleton();
-  MOZ_ASSERT(service);
+  MOZ_RELEASE_ASSERT(service);
 
   // $profileDir/gmp/$platform/
   nsCOMPtr<nsIFile> path;
@@ -94,7 +94,7 @@ class GMPShutdownObserver : public nsIRunnable, public nsIObserver {
   NS_DECL_THREADSAFE_ISUPPORTS
 
   NS_IMETHOD Run() override {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     nsCOMPtr<nsIObserverService> observerService =
         mozilla::services::GetObserverService();
     EXPECT_TRUE(observerService);
@@ -133,7 +133,7 @@ class NotifyObserversTask : public Runnable {
   explicit NotifyObserversTask(const char* aTopic)
       : mozilla::Runnable("NotifyObserversTask"), mTopic(aTopic) {}
   NS_IMETHOD Run() override {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     nsCOMPtr<nsIObserverService> observerService =
         mozilla::services::GetObserverService();
     if (observerService) {
@@ -153,7 +153,7 @@ class ClearCDMStorageTask : public nsIRunnable, public nsIObserver {
   NS_DECL_THREADSAFE_ISUPPORTS
 
   NS_IMETHOD Run() override {
-    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_RELEASE_ASSERT(NS_IsMainThread());
     nsCOMPtr<nsIObserverService> observerService =
         mozilla::services::GetObserverService();
     EXPECT_TRUE(observerService);
@@ -272,7 +272,7 @@ static nsCString GetNodeId(const nsAString& aOrigin,
 static bool IsCDMStorageIsEmpty() {
   RefPtr<GeckoMediaPluginServiceParent> service =
       GeckoMediaPluginServiceParent::GetSingleton();
-  MOZ_ASSERT(service);
+  MOZ_RELEASE_ASSERT(service);
   nsCOMPtr<nsIFile> storage;
   nsresult rv = service->GetStorageDir(getter_AddRefs(storage));
   EXPECT_NS_SUCCEEDED(rv);
@@ -286,14 +286,14 @@ static bool IsCDMStorageIsEmpty() {
 static void AssertIsOnGMPThread() {
   RefPtr<GeckoMediaPluginService> service =
       GeckoMediaPluginService::GetGeckoMediaPluginService();
-  MOZ_ASSERT(service);
+  MOZ_RELEASE_ASSERT(service);
   nsCOMPtr<nsIThread> thread;
   service->GetThread(getter_AddRefs(thread));
-  MOZ_ASSERT(thread);
+  MOZ_RELEASE_ASSERT(thread);
   nsCOMPtr<nsIThread> currentThread;
-  DebugOnly<nsresult> rv = NS_GetCurrentThread(getter_AddRefs(currentThread));
-  MOZ_ASSERT(NS_SUCCEEDED(rv));
-  MOZ_ASSERT(currentThread == thread);
+  nsresult rv = NS_GetCurrentThread(getter_AddRefs(currentThread));
+  MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
+  MOZ_RELEASE_ASSERT(currentThread == thread);
 }
 
 class CDMStorageTest {
@@ -1049,8 +1049,8 @@ class CDMStorageTest {
 
     constexpr auto data = "Just_some_arbitrary_data."_ns;
 
-    MOZ_ASSERT(longRecordName.Length() < GMP_MAX_RECORD_NAME_SIZE);
-    MOZ_ASSERT(longRecordName.Length() > 260);  // Windows MAX_PATH
+    MOZ_RELEASE_ASSERT(longRecordName.Length() < GMP_MAX_RECORD_NAME_SIZE);
+    MOZ_RELEASE_ASSERT(longRecordName.Length() > 260);  // Windows MAX_PATH
 
     nsCString response("stored ");
     response.Append(longRecordName);
diff --git a/dom/media/gtest/TestDeviceInputTrack.cpp b/dom/media/gtest/TestDeviceInputTrack.cpp
index 14b5227f9d..fca06d5e4a 100644
--- a/dom/media/gtest/TestDeviceInputTrack.cpp
+++ b/dom/media/gtest/TestDeviceInputTrack.cpp
@@ -87,7 +87,7 @@ TEST_F(TestDeviceInputTrack, DeviceInputConsumerTrack) {
   class TestDeviceInputConsumerTrack : public DeviceInputConsumerTrack {
    public:
     static TestDeviceInputConsumerTrack* Create(MediaTrackGraph* aGraph) {
-      MOZ_ASSERT(NS_IsMainThread());
+      MOZ_RELEASE_ASSERT(NS_IsMainThread());
       TestDeviceInputConsumerTrack* track =
           new TestDeviceInputConsumerTrack(aGraph->GraphRate());
       aGraph->AddTrack(track);
@@ -95,7 +95,7 @@ TEST_F(TestDeviceInputTrack, DeviceInputConsumerTrack) {
     }
 
     void Destroy() {
-      MOZ_ASSERT(NS_IsMainThread());
+      MOZ_RELEASE_ASSERT(NS_IsMainThread());
       DisconnectDeviceInput();
       DeviceInputConsumerTrack::Destroy();
     }
@@ -108,7 +108,7 @@ TEST_F(TestDeviceInputTrack, DeviceInputConsumerTrack) {
         return 0;
       }
       DeviceInputTrack* t = mInputs[0]->GetSource()->AsDeviceInputTrack();
-      MOZ_ASSERT(t);
+      MOZ_RELEASE_ASSERT(t);
       return t->NumberOfChannels();
     }
 
@@ -122,16 +122,26 @@ TEST_F(TestDeviceInputTrack, DeviceInputConsumerTrack) {
     TestAudioDataListener(uint32_t aChannelCount, bool aIsVoice)
         : mChannelCount(aChannelCount), mIsVoice(aIsVoice) {}
     // Graph thread APIs: AudioDataListenerInterface implementations.
-    uint32_t RequestedInputChannelCount(MediaTrackGraph* aGraph) override {
+    uint32_t RequestedInputChannelCount(
+        MediaTrackGraph* aGraph) const override {
       aGraph->AssertOnGraphThread();
       return mChannelCount;
     }
+    cubeb_input_processing_params RequestedInputProcessingParams(
+        MediaTrackGraph*) const override {
+      return CUBEB_INPUT_PROCESSING_PARAM_NONE;
+    }
     bool IsVoiceInput(MediaTrackGraph* aGraph) const override {
       return mIsVoice;
     };
     void DeviceChanged(MediaTrackGraph* aGraph) override { /* Ignored */
     }
     void Disconnect(MediaTrackGraph* aGraph) override{/* Ignored */};
+    void NotifySetRequestedInputProcessingParamsResult(
+        MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+        const Result<cubeb_input_processing_params, int>& aResult) override {
+      /* Ignored */
+    }
 
    private:
     ~TestAudioDataListener() = default;
diff --git a/dom/media/gtest/TestMP4Demuxer.cpp b/dom/media/gtest/TestMP4Demuxer.cpp
index 43dfdf19a4..1a1bde8035 100644
--- a/dom/media/gtest/TestMP4Demuxer.cpp
+++ b/dom/media/gtest/TestMP4Demuxer.cpp
@@ -56,7 +56,7 @@ class MP4DemuxerBinding {
   }
 
   RefPtr<GenericPromise> CheckTrackKeyFrame(MediaTrackDemuxer* aTrackDemuxer) {
-    MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
+    MOZ_RELEASE_ASSERT(mTaskQueue->IsCurrentThreadIn());
 
     RefPtr<MediaTrackDemuxer> track = aTrackDemuxer;
     RefPtr<MP4DemuxerBinding> binding = this;
@@ -97,7 +97,7 @@ class MP4DemuxerBinding {
   }
 
   RefPtr<GenericPromise> CheckTrackSamples(MediaTrackDemuxer* aTrackDemuxer) {
-    MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn());
+    MOZ_RELEASE_ASSERT(mTaskQueue->IsCurrentThreadIn());
 
     RefPtr<MediaTrackDemuxer> track = aTrackDemuxer;
     RefPtr<MP4DemuxerBinding> binding = this;
diff --git a/dom/media/gtest/TestMediaDataEncoder.cpp b/dom/media/gtest/TestMediaDataEncoder.cpp
index 39c92fb19c..fefedcce43 100644
--- a/dom/media/gtest/TestMediaDataEncoder.cpp
+++ b/dom/media/gtest/TestMediaDataEncoder.cpp
@@ -193,7 +193,7 @@ static already_AddRefed<MediaDataEncoder> CreateH264Encoder(
 }
 
 void WaitForShutdown(const RefPtr<MediaDataEncoder>& aEncoder) {
-  MOZ_ASSERT(aEncoder);
+  MOZ_RELEASE_ASSERT(aEncoder);
 
   Maybe<bool> result;
   // media::Await() supports exclusive promises only, but ShutdownPromise is
diff --git a/dom/media/gtest/TestWebMWriter.cpp b/dom/media/gtest/TestWebMWriter.cpp
index 837ee6a2c6..5384fd7c99 100644
--- a/dom/media/gtest/TestWebMWriter.cpp
+++ b/dom/media/gtest/TestWebMWriter.cpp
@@ -223,7 +223,7 @@ struct WebMioData {
 };
 
 static int webm_read(void* aBuffer, size_t aLength, void* aUserData) {
-  NS_ASSERTION(aUserData, "aUserData must point to a valid WebMioData");
+  MOZ_RELEASE_ASSERT(aUserData, "aUserData must point to a valid WebMioData");
   WebMioData* ioData = static_cast<WebMioData*>(aUserData);
 
   // Check the read length.
@@ -247,7 +247,7 @@ static int webm_read(void* aBuffer, size_t aLength, void* aUserData) {
 }
 
 static int webm_seek(int64_t aOffset, int aWhence, void* aUserData) {
-  NS_ASSERTION(aUserData, "aUserData must point to a valid WebMioData");
+  MOZ_RELEASE_ASSERT(aUserData, "aUserData must point to a valid WebMioData");
   WebMioData* ioData = static_cast<WebMioData*>(aUserData);
 
   if (Abs(aOffset) > ioData->data.Length()) {
@@ -281,7 +281,7 @@ static int webm_seek(int64_t aOffset, int aWhence, void* aUserData) {
 }
 
 static int64_t webm_tell(void* aUserData) {
-  NS_ASSERTION(aUserData, "aUserData must point to a valid WebMioData");
+  MOZ_RELEASE_ASSERT(aUserData, "aUserData must point to a valid WebMioData");
   WebMioData* ioData = static_cast<WebMioData*>(aUserData);
   return ioData->offset.isValid() ? ioData->offset.value() : -1;
 }
diff --git a/dom/media/ipc/MFCDMChild.cpp b/dom/media/ipc/MFCDMChild.cpp
index 2ba2bdaf4e..9df86b82f4 100644
--- a/dom/media/ipc/MFCDMChild.cpp
+++ b/dom/media/ipc/MFCDMChild.cpp
@@ -7,6 +7,7 @@
 #include "mozilla/EMEUtils.h"
 #include "mozilla/KeySystemConfig.h"
 #include "mozilla/RefPtr.h"
+#include "mozilla/StaticString.h"
 #include "mozilla/WMFCDMProxyCallback.h"
 #include "nsString.h"
 #include "RemoteDecoderManagerChild.h"
@@ -44,7 +45,7 @@ namespace mozilla {
 
 #define INVOKE_ASYNC(method, promiseId, param1)                      \
   do {                                                               \
-    auto callsite = __func__;                                        \
+    StaticString callsite = __func__;                                \
     using ParamType = std::remove_reference<decltype(param1)>::type; \
     mManagerThread->Dispatch(NS_NewRunnableFunction(                 \
         callsite, [self = RefPtr{this}, callsite, promiseId,         \
@@ -56,7 +57,7 @@ namespace mozilla {
 
 #define INVOKE_ASYNC2(method, promiseId, param1, param2)              \
   do {                                                                \
-    auto callsite = __func__;                                         \
+    StaticString callsite = __func__;                                 \
     using ParamType1 = std::remove_reference<decltype(param1)>::type; \
     using ParamType2 = std::remove_reference<decltype(param2)>::type; \
     mManagerThread->Dispatch(NS_NewRunnableFunction(                  \
@@ -188,7 +189,7 @@ void MFCDMChild::AssertSendable() {
 
 template <typename PromiseType>
 already_AddRefed<PromiseType> MFCDMChild::InvokeAsync(
-    std::function<void()>&& aCall, const char* aCallerName,
+    std::function<void()>&& aCall, StaticString aCallerName,
     MozPromiseHolder<PromiseType>& aPromise) {
   AssertSendable();
 
diff --git a/dom/media/ipc/MFCDMChild.h b/dom/media/ipc/MFCDMChild.h
index 3396b0c790..ec766cab24 100644
--- a/dom/media/ipc/MFCDMChild.h
+++ b/dom/media/ipc/MFCDMChild.h
@@ -30,7 +30,7 @@ class MFCDMChild final : public PMFCDMChild {
 
   template <typename PromiseType>
   already_AddRefed<PromiseType> InvokeAsync(
-      std::function<void()>&& aCall, const char* aCallerName,
+      std::function<void()>&& aCall, StaticString aCallerName,
       MozPromiseHolder<PromiseType>& aPromise);
 
   using InitPromise = MozPromise<MFCDMInitIPDL, nsresult, true>;
diff --git a/dom/media/ipc/RDDChild.cpp b/dom/media/ipc/RDDChild.cpp
index fb2e14bb4f..6180ec7391 100644
--- a/dom/media/ipc/RDDChild.cpp
+++ b/dom/media/ipc/RDDChild.cpp
@@ -5,6 +5,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "RDDChild.h"
 
+#include "TelemetryProbesReporter.h"
+#include "VideoUtils.h"
 #include "mozilla/FOGIPC.h"
 #include "mozilla/RDDProcessManager.h"
 #include "mozilla/dom/ContentParent.h"
@@ -142,6 +144,13 @@ mozilla::ipc::IPCResult RDDChild::RecvGetModulesTrust(
 
 mozilla::ipc::IPCResult RDDChild::RecvUpdateMediaCodecsSupported(
     const media::MediaCodecsSupported& aSupported) {
+#if defined(XP_MACOSX) || defined(XP_LINUX)
+  // We report this on GPUChild on Windows and Android
+  if (ContainHardwareCodecsSupported(aSupported)) {
+    mozilla::TelemetryProbesReporter::ReportDeviceMediaCodecSupported(
+        aSupported);
+  }
+#endif
   dom::ContentParent::BroadcastMediaCodecsSupportedUpdate(
       RemoteDecodeIn::RddProcess, aSupported);
   return IPC_OK();
diff --git a/dom/media/ipc/RDDParent.cpp b/dom/media/ipc/RDDParent.cpp
index 8892e8fbbe..4b6c1372ce 100644
--- a/dom/media/ipc/RDDParent.cpp
+++ b/dom/media/ipc/RDDParent.cpp
@@ -52,6 +52,10 @@
 #  include "mozilla/SandboxTestingChild.h"
 #endif
 
+#if defined(XP_MACOSX) || defined(XP_LINUX)
+#  include "VideoUtils.h"
+#endif
+
 namespace mozilla {
 
 using namespace ipc;
@@ -159,18 +163,6 @@ mozilla::ipc::IPCResult RDDParent::RecvInit(
 }
 
 IPCResult RDDParent::RecvUpdateVar(const GfxVarUpdate& aUpdate) {
-#if defined(XP_WIN)
-  auto scopeExit = MakeScopeExit(
-      [couldUseHWDecoder = gfx::gfxVars::CanUseHardwareVideoDecoding()] {
-        if (couldUseHWDecoder != gfx::gfxVars::CanUseHardwareVideoDecoding()) {
-          // The capabilities of the system may have changed, force a refresh by
-          // re-initializing the WMF PDM.
-          WMFDecoderModule::Init();
-          Unused << RDDParent::GetSingleton()->SendUpdateMediaCodecsSupported(
-              PDMFactory::Supported(true /* force refresh */));
-        }
-      });
-#endif
   gfxVars::ApplyUpdate(aUpdate);
   return IPC_OK();
 }
diff --git a/dom/media/ipc/RemoteImageHolder.h b/dom/media/ipc/RemoteImageHolder.h
index 981e24d150..36deab1ef1 100644
--- a/dom/media/ipc/RemoteImageHolder.h
+++ b/dom/media/ipc/RemoteImageHolder.h
@@ -58,12 +58,12 @@ class RemoteImageHolder final {
   gfx::ColorRange mColorRange = {};
 };
 
-  template <>
-  struct ipc::IPDLParamTraits<RemoteImageHolder> {
-    static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor,
-                      RemoteImageHolder&& aParam);
-    static bool Read(IPC::MessageReader* aReader, IProtocol* aActor,
-                     RemoteImageHolder* aResult);
+template <>
+struct ipc::IPDLParamTraits<RemoteImageHolder> {
+  static void Write(IPC::MessageWriter* aWriter, IProtocol* aActor,
+                    RemoteImageHolder&& aParam);
+  static bool Read(IPC::MessageReader* aReader, IProtocol* aActor,
+                   RemoteImageHolder* aResult);
 };
 
 }  // namespace mozilla
diff --git a/dom/media/mediacapabilities/KeyValueStorage.cpp b/dom/media/mediacapabilities/KeyValueStorage.cpp
index f0ac0aad7d..a2e007c598 100644
--- a/dom/media/mediacapabilities/KeyValueStorage.cpp
+++ b/dom/media/mediacapabilities/KeyValueStorage.cpp
@@ -94,7 +94,7 @@ class VoidCallback final : public nsIKeyValueVoidCallback {
     mResultPromise.Reject(NS_ERROR_FAILURE, __func__);
     return NS_OK;
   }
-  RefPtr<GenericPromise> Ensure(const char* aMethodName) {
+  RefPtr<GenericPromise> Ensure(StaticString aMethodName) {
     return mResultPromise.Ensure(aMethodName);
   }
 
diff --git a/dom/media/mediacontrol/ContentMediaController.cpp b/dom/media/mediacontrol/ContentMediaController.cpp
index e1fe574d9b..0c3bbbecdc 100644
--- a/dom/media/mediacontrol/ContentMediaController.cpp
+++ b/dom/media/mediacontrol/ContentMediaController.cpp
@@ -304,6 +304,37 @@ void ContentMediaAgent::UpdatePositionState(
   }
 }
 
+void ContentMediaAgent::UpdateGuessedPositionState(
+    uint64_t aBrowsingContextId, const nsID& aMediaId,
+    const Maybe<PositionState>& aState) {
+  RefPtr<BrowsingContext> bc = GetBrowsingContextForAgent(aBrowsingContextId);
+  if (!bc || bc->IsDiscarded()) {
+    return;
+  }
+
+  if (aState) {
+    LOG("Update guessed position state for BC %" PRId64
+        " media id %s (duration=%f, playbackRate=%f, position=%f)",
+        bc->Id(), aMediaId.ToString().get(), aState->mDuration,
+        aState->mPlaybackRate, aState->mLastReportedPlaybackPosition);
+  } else {
+    LOG("Clear guessed position state for BC %" PRId64 " media id %s", bc->Id(),
+        aMediaId.ToString().get());
+  }
+
+  if (XRE_IsContentProcess()) {
+    ContentChild* contentChild = ContentChild::GetSingleton();
+    Unused << contentChild->SendNotifyGuessedPositionStateChanged(bc, aMediaId,
+                                                                  aState);
+    return;
+  }
+  // This would only happen when we disable e10s.
+  if (RefPtr<IMediaInfoUpdater> updater =
+          bc->Canonical()->GetMediaController()) {
+    updater->UpdateGuessedPositionState(bc->Id(), aMediaId, aState);
+  }
+}
+
 ContentMediaController::ContentMediaController(uint64_t aId) {
   LOG("Create content media controller for BC %" PRId64, aId);
 }
diff --git a/dom/media/mediacontrol/ContentMediaController.h b/dom/media/mediacontrol/ContentMediaController.h
index a58be24b9d..236b3b254d 100644
--- a/dom/media/mediacontrol/ContentMediaController.h
+++ b/dom/media/mediacontrol/ContentMediaController.h
@@ -67,6 +67,9 @@ class ContentMediaAgent : public IMediaInfoUpdater {
                                   bool aIsInFullScreen) override;
   void UpdatePositionState(uint64_t aBrowsingContextId,
                            const Maybe<PositionState>& aState) override;
+  void UpdateGuessedPositionState(uint64_t aBrowsingContextId,
+                                  const nsID& aMediaId,
+                                  const Maybe<PositionState>& aState) override;
 
   // Use these methods to register/unregister `ContentMediaControlKeyReceiver`
   // in order to listen to media control key events.
diff --git a/dom/media/mediacontrol/MediaControlKeyManager.cpp b/dom/media/mediacontrol/MediaControlKeyManager.cpp
index b40d3af91e..92e2679bdd 100644
--- a/dom/media/mediacontrol/MediaControlKeyManager.cpp
+++ b/dom/media/mediacontrol/MediaControlKeyManager.cpp
@@ -107,6 +107,7 @@ void MediaControlKeyManager::StopMonitoringControlKeys() {
                            nullptr);
       obs->NotifyObservers(nullptr, "media-displayed-metadata-changed",
                            nullptr);
+      obs->NotifyObservers(nullptr, "media-position-state-changed", nullptr);
     }
   }
 }
@@ -197,6 +198,12 @@ void MediaControlKeyManager::SetPositionState(
   if (mEventSource && mEventSource->IsOpened()) {
     mEventSource->SetPositionState(aState);
   }
+
+  if (StaticPrefs::media_mediacontrol_testingevents_enabled()) {
+    if (nsCOMPtr<nsIObserverService> obs = services::GetObserverService()) {
+      obs->NotifyObservers(nullptr, "media-position-state-changed", nullptr);
+    }
+  }
 }
 
 void MediaControlKeyManager::OnPreferenceChange() {
diff --git a/dom/media/mediacontrol/MediaControlService.cpp b/dom/media/mediacontrol/MediaControlService.cpp
index f45ab4253d..c64749f556 100644
--- a/dom/media/mediacontrol/MediaControlService.cpp
+++ b/dom/media/mediacontrol/MediaControlService.cpp
@@ -482,6 +482,7 @@ void MediaControlService::ControllerManager::UpdateMainControllerInternal(
     mSource->SetPlaybackState(mMainController->PlaybackState());
     mSource->SetMediaMetadata(mMainController->GetCurrentMediaMetadata());
     mSource->SetSupportedMediaKeys(mMainController->GetSupportedMediaKeys());
+    mSource->SetPositionState(mMainController->GetCurrentPositionState());
     ConnectMainControllerEvents();
   }
 
diff --git a/dom/media/mediacontrol/MediaPlaybackStatus.cpp b/dom/media/mediacontrol/MediaPlaybackStatus.cpp
index 80dedf8599..434d6dbd7e 100644
--- a/dom/media/mediacontrol/MediaPlaybackStatus.cpp
+++ b/dom/media/mediacontrol/MediaPlaybackStatus.cpp
@@ -71,6 +71,23 @@ void MediaPlaybackStatus::UpdateMediaAudibleState(uint64_t aContextId,
   }
 }
 
+void MediaPlaybackStatus::UpdateGuessedPositionState(
+    uint64_t aContextId, const nsID& aElementId,
+    const Maybe<PositionState>& aState) {
+  MOZ_ASSERT(NS_IsMainThread());
+  if (aState) {
+    LOG("Update guessed position state for context %" PRIu64
+        " element %s (duration=%f, playbackRate=%f, position=%f)",
+        aContextId, aElementId.ToString().get(), aState->mDuration,
+        aState->mPlaybackRate, aState->mLastReportedPlaybackPosition);
+  } else {
+    LOG("Clear guessed position state for context %" PRIu64 " element %s",
+        aContextId, aElementId.ToString().get());
+  }
+  ContextMediaInfo& info = GetNotNullContextInfo(aContextId);
+  info.UpdateGuessedPositionState(aElementId, aState);
+}
+
 bool MediaPlaybackStatus::IsPlaying() const {
   MOZ_ASSERT(NS_IsMainThread());
   return std::any_of(mContextInfoMap.Values().cbegin(),
@@ -92,6 +109,35 @@ bool MediaPlaybackStatus::IsAnyMediaBeingControlled() const {
       [](const auto& info) { return info->IsAnyMediaBeingControlled(); });
 }
 
+Maybe<PositionState> MediaPlaybackStatus::GuessedMediaPositionState(
+    Maybe<uint64_t> aPreferredContextId) const {
+  auto contextId = aPreferredContextId;
+  if (!contextId) {
+    contextId = mOwningAudioFocusContextId;
+  }
+
+  // either the preferred or focused context
+  if (contextId) {
+    auto entry = mContextInfoMap.Lookup(*contextId);
+    if (!entry) {
+      return Nothing();
+    }
+    LOG("Using guessed position state from preferred/focused BC %" PRId64,
+        *contextId);
+    return entry.Data()->GuessedPositionState();
+  }
+
+  // look for the first position state
+  for (const auto& context : mContextInfoMap.Values()) {
+    auto state = context->GuessedPositionState();
+    if (state) {
+      LOG("Using guessed position state from BC %" PRId64, context->Id());
+      return state;
+    }
+  }
+  return Nothing();
+}
+
 MediaPlaybackStatus::ContextMediaInfo&
 MediaPlaybackStatus::GetNotNullContextInfo(uint64_t aContextId) {
   MOZ_ASSERT(NS_IsMainThread());
@@ -139,4 +185,22 @@ bool MediaPlaybackStatus::IsContextOwningAudioFocus(uint64_t aContextId) const {
                                     : false;
 }
 
+Maybe<PositionState>
+MediaPlaybackStatus::ContextMediaInfo::GuessedPositionState() const {
+  if (mGuessedPositionStateMap.Count() != 1) {
+    LOG("Count is %d", mGuessedPositionStateMap.Count());
+    return Nothing();
+  }
+  return Some(mGuessedPositionStateMap.begin()->GetData());
+}
+
+void MediaPlaybackStatus::ContextMediaInfo::UpdateGuessedPositionState(
+    const nsID& aElementId, const Maybe<PositionState>& aState) {
+  if (aState) {
+    mGuessedPositionStateMap.InsertOrUpdate(aElementId, *aState);
+  } else {
+    mGuessedPositionStateMap.Remove(aElementId);
+  }
+}
+
 }  // namespace mozilla::dom
diff --git a/dom/media/mediacontrol/MediaPlaybackStatus.h b/dom/media/mediacontrol/MediaPlaybackStatus.h
index da597e4dfa..f9ac25f73d 100644
--- a/dom/media/mediacontrol/MediaPlaybackStatus.h
+++ b/dom/media/mediacontrol/MediaPlaybackStatus.h
@@ -7,9 +7,11 @@
 
 #include "mozilla/Maybe.h"
 #include "mozilla/RefPtr.h"
+#include "mozilla/dom/MediaSession.h"
 #include "nsISupportsImpl.h"
 #include "nsTArray.h"
 #include "nsTHashMap.h"
+#include "nsID.h"
 
 namespace mozilla::dom {
 
@@ -63,10 +65,14 @@ class MediaPlaybackStatus final {
  public:
   void UpdateMediaPlaybackState(uint64_t aContextId, MediaPlaybackState aState);
   void UpdateMediaAudibleState(uint64_t aContextId, MediaAudibleState aState);
+  void UpdateGuessedPositionState(uint64_t aContextId, const nsID& aElementId,
+                                  const Maybe<PositionState>& aState);
 
   bool IsPlaying() const;
   bool IsAudible() const;
   bool IsAnyMediaBeingControlled() const;
+  Maybe<PositionState> GuessedMediaPositionState(
+      Maybe<uint64_t> aPreferredContextId) const;
 
   Maybe<uint64_t> GetAudioFocusOwnerContextId() const;
 
@@ -121,6 +127,10 @@ class MediaPlaybackStatus final {
     bool IsAnyMediaBeingControlled() const { return mControlledMediaNum > 0; }
     uint64_t Id() const { return mContextId; }
 
+    Maybe<PositionState> GuessedPositionState() const;
+    void UpdateGuessedPositionState(const nsID& aElementId,
+                                    const Maybe<PositionState>& aState);
+
    private:
     /**
      * The possible value for those three numbers should follow this rule,
@@ -130,6 +140,12 @@ class MediaPlaybackStatus final {
     uint32_t mAudibleMediaNum = 0;
     uint32_t mPlayingMediaNum = 0;
     uint64_t mContextId = 0;
+
+    /**
+     * Contains the guessed position state of all media elements in this
+     * browsing context identified by their ID.
+     */
+    nsTHashMap<nsID, PositionState> mGuessedPositionStateMap;
   };
 
   ContextMediaInfo& GetNotNullContextInfo(uint64_t aContextId);
diff --git a/dom/media/mediacontrol/MediaStatusManager.cpp b/dom/media/mediacontrol/MediaStatusManager.cpp
index 633ae19a44..6e86dbf2eb 100644
--- a/dom/media/mediacontrol/MediaStatusManager.cpp
+++ b/dom/media/mediacontrol/MediaStatusManager.cpp
@@ -380,6 +380,29 @@ void MediaStatusManager::UpdatePositionState(
   mPositionStateChangedEvent.Notify(aState);
 }
 
+void MediaStatusManager::UpdateGuessedPositionState(
+    uint64_t aBrowsingContextId, const nsID& aMediaId,
+    const Maybe<PositionState>& aGuessedState) {
+  mPlaybackStatusDelegate.UpdateGuessedPositionState(aBrowsingContextId,
+                                                     aMediaId, aGuessedState);
+
+  // The position state comes from a non-active media session and
+  // there is another one active (with some metadata).
+  if (mActiveMediaSessionContextId &&
+      *mActiveMediaSessionContextId != aBrowsingContextId) {
+    return;
+  }
+
+  // media session is declared for the updated session, but there's no active
+  // session - it will get emitted once the session becomes active
+  if (mMediaSessionInfoMap.Contains(aBrowsingContextId) &&
+      !mActiveMediaSessionContextId) {
+    return;
+  }
+
+  mPositionStateChangedEvent.Notify(GetCurrentPositionState());
+}
+
 void MediaStatusManager::NotifySupportedKeysChangedIfNeeded(
     uint64_t aBrowsingContextId) {
   // Only the active media session's supported actions would be shown in virtual
@@ -431,11 +454,13 @@ MediaMetadataBase MediaStatusManager::GetCurrentMediaMetadata() const {
 Maybe<PositionState> MediaStatusManager::GetCurrentPositionState() const {
   if (mActiveMediaSessionContextId) {
     auto info = mMediaSessionInfoMap.Lookup(*mActiveMediaSessionContextId);
-    if (info) {
+    if (info && info->mPositionState) {
       return info->mPositionState;
     }
   }
-  return Nothing();
+
+  return mPlaybackStatusDelegate.GuessedMediaPositionState(
+      mActiveMediaSessionContextId);
 }
 
 void MediaStatusManager::FillMissingTitleAndArtworkIfNeeded(
diff --git a/dom/media/mediacontrol/MediaStatusManager.h b/dom/media/mediacontrol/MediaStatusManager.h
index a4216c8453..45f3ccccc5 100644
--- a/dom/media/mediacontrol/MediaStatusManager.h
+++ b/dom/media/mediacontrol/MediaStatusManager.h
@@ -120,6 +120,12 @@ class IMediaInfoUpdater {
   // Use this method when media session update its position state.
   virtual void UpdatePositionState(uint64_t aBrowsingContextId,
                                    const Maybe<PositionState>& aState) = 0;
+
+  // Use this method to update controlled media's position state and the
+  // browsing context where controlled media exists.
+  virtual void UpdateGuessedPositionState(
+      uint64_t aBrowsingContextId, const nsID& aMediaId,
+      const Maybe<PositionState>& aGuessedState) = 0;
 };
 
 /**
@@ -165,12 +171,19 @@ class MediaStatusManager : public IMediaInfoUpdater {
                      MediaSessionAction aAction) override;
   void UpdatePositionState(uint64_t aBrowsingContextId,
                            const Maybe<PositionState>& aState) override;
+  void UpdateGuessedPositionState(
+      uint64_t aBrowsingContextId, const nsID& aMediaId,
+      const Maybe<PositionState>& aGuessedState) override;
 
   // Return active media session's metadata if active media session exists and
   // it has already set its metadata. Otherwise, return default media metadata
   // which is based on website's title and favicon.
   MediaMetadataBase GetCurrentMediaMetadata() const;
 
+  // Return the active media session's position state. If the active media
+  // session doesn't exist or doesn't have any state, Nothing is returned.
+  Maybe<PositionState> GetCurrentPositionState() const;
+
   bool IsMediaAudible() const;
   bool IsMediaPlaying() const;
   bool IsAnyMediaBeingControlled() const;
@@ -247,10 +260,6 @@ class MediaStatusManager : public IMediaInfoUpdater {
   // media session doesn't exist, return  'None' instead.
   MediaSessionPlaybackState GetCurrentDeclaredPlaybackState() const;
 
-  // Return the active media session's position state. If the active media
-  // session doesn't exist or doesn't have any state, Nothing is returned.
-  Maybe<PositionState> GetCurrentPositionState() const;
-
   // This state can match to the `guessed playback state` in the spec [1], it
   // indicates if we have any media element playing within the tab which this
   // controller belongs to. But currently we only take media elements into
diff --git a/dom/media/mediacontrol/tests/browser/browser_media_control_position_state.js b/dom/media/mediacontrol/tests/browser/browser_media_control_position_state.js
index 6074e2ee16..75f65eb34b 100644
--- a/dom/media/mediacontrol/tests/browser/browser_media_control_position_state.js
+++ b/dom/media/mediacontrol/tests/browser/browser_media_control_position_state.js
@@ -4,6 +4,7 @@ const IFRAME_URL =
   "https://example.com/browser/dom/media/mediacontrol/tests/browser/file_iframe_media.html";
 
 const testVideoId = "video";
+const videoDuration = 5.589333;
 
 add_task(async function setupTestingPref() {
   await SpecialPowers.pushPrefEnv({
@@ -18,9 +19,15 @@ add_task(async function setupTestingPref() {
 add_task(async function testSetPositionState() {
   info(`open media page`);
   const tab = await createLoadedTabWrapper(PAGE_URL);
+  logPositionStateChangeEvents(tab);
+
+  info(`apply initial position state`);
+  await applyPositionState(tab, { duration: 10 });
 
   info(`start media`);
+  const initialPositionState = isNextPositionState(tab, { duration: 10 });
   await playMedia(tab, testVideoId);
+  await initialPositionState;
 
   info(`set duration only`);
   await setPositionState(tab, {
@@ -47,9 +54,15 @@ add_task(async function testSetPositionState() {
 add_task(async function testSetPositionStateFromInactiveMediaSession() {
   info(`open media page`);
   const tab = await createLoadedTabWrapper(PAGE_URL);
+  logPositionStateChangeEvents(tab);
+
+  info(`apply initial position state`);
+  await applyPositionState(tab, { duration: 10 });
 
   info(`start media`);
+  const initialPositionState = isNextPositionState(tab, { duration: 10 });
   await playMedia(tab, testVideoId);
+  await initialPositionState;
 
   info(
     `add an event listener to measure how many times the position state changes`
@@ -82,48 +95,193 @@ add_task(async function testSetPositionStateFromInactiveMediaSession() {
 });
 
 /**
- * The following are helper functions.
+ *
+ * @param {boolean} withMetadata
+ *                  Specifies if the tab should set metadata for the playing video
  */
-async function setPositionState(tab, positionState) {
+async function testGuessedPositionState(withMetadata) {
+  info(`open media page`);
+  const tab = await createLoadedTabWrapper(PAGE_URL);
+  logPositionStateChangeEvents(tab);
+
+  if (withMetadata) {
+    info(`set media metadata`);
+    await setMediaMetadata(tab, { title: "A Video" });
+  }
+
+  info(`start media`);
+  await emitsPositionState(() => playMedia(tab, testVideoId), tab, {
+    duration: videoDuration,
+    position: 0,
+    playbackRate: 1.0,
+  });
+
+  info(`set playback rate to 2x`);
+  await emitsPositionState(() => setPlaybackRate(tab, testVideoId, 2.0), tab, {
+    duration: videoDuration,
+    position: null, // ignored,
+    playbackRate: 2.0,
+  });
+
+  info(`seek to 1s`);
+  await emitsPositionState(() => setCurrentTime(tab, testVideoId, 1.0), tab, {
+    duration: videoDuration,
+    position: 1.0,
+    playbackRate: 2.0,
+  });
+
+  let positionChangedNum = 0;
   const controller = tab.linkedBrowser.browsingContext.mediaController;
-  const positionStateChanged = new Promise(r => {
-    controller.addEventListener(
-      "positionstatechange",
-      event => {
-        const { duration, playbackRate, position } = positionState;
-        // duration is mandatory.
-        is(
-          event.duration,
-          duration,
-          `expected duration ${event.duration} is equal to ${duration}`
-        );
-
-        // Playback rate is optional, if it's not present, default should be 1.0
-        if (playbackRate) {
-          is(
-            event.playbackRate,
-            playbackRate,
-            `expected playbackRate ${event.playbackRate} is equal to ${playbackRate}`
-          );
-        } else {
-          is(event.playbackRate, 1.0, `expected default playbackRate is 1.0`);
-        }
-
-        // Position state is optional, if it's not present, default should be 0.0
-        if (position) {
-          is(
-            event.position,
-            position,
-            `expected position ${event.position} is equal to ${position}`
-          );
-        } else {
-          is(event.position, 0.0, `expected default position is 0.0`);
-        }
-        r();
-      },
-      { once: true }
-    );
+  controller.onpositionstatechange = () => positionChangedNum++;
+
+  info(`pause media`);
+  // shouldn't generate an event
+  await pauseMedia(tab, testVideoId);
+
+  info(`seek to 2s`);
+  await emitsPositionState(() => setCurrentTime(tab, testVideoId, 2.0), tab, {
+    duration: videoDuration,
+    position: 2.0,
+    playbackRate: 2.0,
+  });
+
+  info(`start media`);
+  await emitsPositionState(() => playMedia(tab, testVideoId), tab, {
+    duration: videoDuration,
+    position: 2.0,
+    playbackRate: 2.0,
   });
+
+  is(
+    positionChangedNum,
+    2,
+    `We should only receive two of position changes, because pausing is effectless`
+  );
+
+  info(`remove tab`);
+  await tab.close();
+}
+
+add_task(async function testGuessedPositionStateWithMetadata() {
+  testGuessedPositionState(true);
+});
+
+add_task(async function testGuessedPositionStateWithoutMetadata() {
+  testGuessedPositionState(false);
+});
+
+/**
+ * @typedef {{
+ *   duration: number,
+ *   playbackRate?: number | null,
+ *   position?: number | null,
+ * }} ExpectedPositionState
+ */
+
+/**
+ * Checks if the next received position state matches the expected one.
+ *
+ * @param {tab} tab
+ *        The tab that contains the media
+ * @param {ExpectedPositionState} positionState
+ *         The expected position state. `duration` is mandatory. `playbackRate`
+ *         and `position` are optional. If they're `null`, they're ignored,
+ *         otherwise if they're not present or undefined, they're expected to
+ *         be the default value.
+ * @returns {Promise}
+ *          Resolves when the event has been received
+ */
+async function isNextPositionState(tab, positionState) {
+  const got = await nextPositionState(tab);
+  isPositionState(got, positionState);
+}
+
+/**
+ * Waits for the next position state and returns it
+ *
+ * @param {tab} tab The tab to receive position state from
+ * @returns {Promise<MediaPositionState>} The emitted position state
+ */
+function nextPositionState(tab) {
+  const controller = tab.linkedBrowser.browsingContext.mediaController;
+  return new Promise(r => {
+    controller.addEventListener("positionstatechange", r, { once: true });
+  });
+}
+
+/**
+ * @param {MediaPositionState} got
+ *        The received position state
+ * @param {ExpectedPositionState} expected
+ *         The expected position state. `duration` is mandatory. `playbackRate`
+ *         and `position` are optional. If they're `null`, they're ignored,
+ *         otherwise if they're not present or undefined, they're expected to
+ *         be the default value.
+ */
+function isPositionState(got, expected) {
+  const { duration, playbackRate, position } = expected;
+  // duration is mandatory.
+  isFuzzyEq(got.duration, duration, "duration");
+
+  // Playback rate is optional, if it's not present, default should be 1.0
+  if (typeof playbackRate === "number") {
+    isFuzzyEq(got.playbackRate, playbackRate, "playbackRate");
+  } else if (playbackRate !== null) {
+    is(got.playbackRate, 1.0, `expected default playbackRate is 1.0`);
+  }
+
+  // Position is optional, if it's not present, default should be 0.0
+  if (typeof position === "number") {
+    isFuzzyEq(got.position, position, "position");
+  } else if (position !== null) {
+    is(got.position, 0.0, `expected default position is 0.0`);
+  }
+}
+
+/**
+ * Checks if two numbers are equal within one significant digit
+ *
+ * @param {number} got
+ *        The value received while testing
+ * @param {number} expected
+ *        The expected value
+ * @param {string} role
+ *        The role of the check (used for formatting)
+ */
+function isFuzzyEq(got, expected, role) {
+  expected = expected.toFixed(1);
+  got = got.toFixed(1);
+  is(got, expected, `expected ${role} ${got} to equal ${expected}`);
+}
+
+/**
+ * Test if `cb` emits a position state event.
+ *
+ * @param {() => (void | Promise<void>)} cb
+ *        A callback that is expected to generate a position state event
+ * @param {tab} tab
+ *        The tab that contains the media
+ * @param {ExpectedPositionState} positionState
+ *        The expected position state to be generated.
+ */
+async function emitsPositionState(cb, tab, positionState) {
+  const positionStateChanged = isNextPositionState(tab, positionState);
+  await cb();
+  await positionStateChanged;
+}
+
+/**
+ * The following are helper functions.
+ */
+async function setPositionState(tab, positionState) {
+  await emitsPositionState(
+    () => applyPositionState(tab, positionState),
+    tab,
+    positionState
+  );
+}
+
+async function applyPositionState(tab, positionState) {
   await SpecialPowers.spawn(
     tab.linkedBrowser,
     [positionState],
@@ -131,7 +289,12 @@ async function setPositionState(tab, positionState) {
       content.navigator.mediaSession.setPositionState(positionState);
     }
   );
-  await positionStateChanged;
+}
+
+async function setMediaMetadata(tab, metadata) {
+  await SpecialPowers.spawn(tab.linkedBrowser, [metadata], data => {
+    content.navigator.mediaSession.metadata = new content.MediaMetadata(data);
+  });
 }
 
 async function setPositionStateOnInactiveMediaSession(tab) {
diff --git a/dom/media/mediacontrol/tests/browser/head.js b/dom/media/mediacontrol/tests/browser/head.js
index cac96c0bff..7c6a1e37e4 100644
--- a/dom/media/mediacontrol/tests/browser/head.js
+++ b/dom/media/mediacontrol/tests/browser/head.js
@@ -195,6 +195,58 @@ function checkOrWaitUntilMediaStartedPlaying(tab, elementId) {
 }
 
 /**
+ * Set the playback rate on a media element.
+ *
+ * @param {tab} tab
+ *        The tab that contains the media which we would check
+ * @param {string} elementId
+ *        The element Id of the media which we would check
+ * @param {number} rate
+ *        The playback rate to set
+ * @return {Promise}
+ *         Resolve when the playback rate has been set
+ */
+function setPlaybackRate(tab, elementId, rate) {
+  return SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [elementId, rate],
+    (Id, rate) => {
+      const video = content.document.getElementById(Id);
+      if (!video) {
+        ok(false, `can't get the media element!`);
+      }
+      video.playbackRate = rate;
+    }
+  );
+}
+
+/**
+ * Set the time on a media element.
+ *
+ * @param {tab} tab
+ *        The tab that contains the media which we would check
+ * @param {string} elementId
+ *        The element Id of the media which we would check
+ * @param {number} currentTime
+ *        The time to set
+ * @return {Promise}
+ *         Resolve when the time has been set
+ */
+function setCurrentTime(tab, elementId, currentTime) {
+  return SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [elementId, currentTime],
+    (Id, currentTime) => {
+      const video = content.document.getElementById(Id);
+      if (!video) {
+        ok(false, `can't get the media element!`);
+      }
+      video.currentTime = currentTime;
+    }
+  );
+}
+
+/**
  * Returns a promise that resolves when the specific media stops playing.
  *
  * @param {tab} tab
@@ -390,6 +442,18 @@ function waitUntilMediaControllerAmountChanged() {
 }
 
 /**
+ * Wait until the position state that would be displayed on the virtual control
+ * interface changes. we would observe that by listening for
+ * `media-position-state-changed` notification.
+ *
+ * @return {Promise}
+ *         Resolve when observing `media-position-state-changed`
+ */
+function waitUntilPositionStateChanged() {
+  return BrowserUtils.promiseObserved("media-position-state-changed");
+}
+
+/**
  * check if the media controll from given tab is active. If not, return a
  * promise and resolve it when controller become active.
  */
@@ -400,3 +464,20 @@ async function checkOrWaitUntilControllerBecomeActive(tab) {
   }
   await new Promise(r => (controller.onactivated = r));
 }
+
+/**
+ * Logs all `positionstatechange` events in a tab.
+ */
+function logPositionStateChangeEvents(tab) {
+  tab.linkedBrowser.browsingContext.mediaController.addEventListener(
+    "positionstatechange",
+    event =>
+      info(
+        `got position state: ${JSON.stringify({
+          duration: event.duration,
+          playbackRate: event.playbackRate,
+          position: event.position,
+        })}`
+      )
+  );
+}
diff --git a/dom/media/mediasource/MediaSource.cpp b/dom/media/mediasource/MediaSource.cpp
index 94e9904262..8f4cd0c514 100644
--- a/dom/media/mediasource/MediaSource.cpp
+++ b/dom/media/mediasource/MediaSource.cpp
@@ -191,8 +191,7 @@ void MediaSource::IsTypeSupported(const nsAString& aType,
     return;
   }
   if (mimeType == MEDIAMIMETYPE("audio/webm")) {
-    if (!(StaticPrefs::media_mediasource_webm_enabled() ||
-          StaticPrefs::media_mediasource_webm_audio_enabled())) {
+    if (!StaticPrefs::media_mediasource_webm_enabled()) {
       // Don't leak information about the fact that it's pref-disabled; just act
       // like we can't play it.  Or should this throw "Unknown type"?
       return aRv.ThrowNotSupportedError("Can't play type");
diff --git a/dom/media/mediasource/MediaSourceDemuxer.cpp b/dom/media/mediasource/MediaSourceDemuxer.cpp
index 6df15cb2d4..b846beb403 100644
--- a/dom/media/mediasource/MediaSourceDemuxer.cpp
+++ b/dom/media/mediasource/MediaSourceDemuxer.cpp
@@ -271,7 +271,7 @@ MediaSourceTrackDemuxer::MediaSourceTrackDemuxer(MediaSourceDemuxer* aParent,
     : mParent(aParent),
       mTaskQueue(mParent->GetTaskQueue()),
       mType(aType),
-      mMutex("MediaSourceTrackDemuxer"),
+      mMutex("MediaSourceTrackDemuxer", this),
       mManager(aManager),
       mReset(true),
       mPreRoll(TimeUnit::FromMicroseconds(
@@ -316,6 +316,7 @@ void MediaSourceTrackDemuxer::Reset() {
   RefPtr<MediaSourceTrackDemuxer> self = this;
   nsCOMPtr<nsIRunnable> task =
       NS_NewRunnableFunction("MediaSourceTrackDemuxer::Reset", [self]() {
+        self->mMutex.AssertOnWritingThread();
         self->mNextSample.reset();
         self->mReset = true;
         if (!self->mManager) {
@@ -324,7 +325,7 @@ void MediaSourceTrackDemuxer::Reset() {
         MOZ_ASSERT(self->OnTaskQueue());
         self->mManager->Seek(self->mType, TimeUnit::Zero(), TimeUnit::Zero());
         {
-          MutexAutoLock mon(self->mMutex);
+          MutexSingleWriterAutoLockOnThread(lock, self->mMutex);
           self->mNextRandomAccessPoint =
               self->mManager->GetNextRandomAccessPoint(
                   self->mType, MediaSourceDemuxer::EOS_FUZZ);
@@ -336,7 +337,7 @@ void MediaSourceTrackDemuxer::Reset() {
 }
 
 nsresult MediaSourceTrackDemuxer::GetNextRandomAccessPoint(TimeUnit* aTime) {
-  MutexAutoLock mon(mMutex);
+  MutexSingleWriterAutoLock mon(mMutex);
   *aTime = mNextRandomAccessPoint;
   return NS_OK;
 }
@@ -350,7 +351,7 @@ MediaSourceTrackDemuxer::SkipToNextRandomAccessPoint(
 }
 
 media::TimeIntervals MediaSourceTrackDemuxer::GetBuffered() {
-  MutexAutoLock mon(mMutex);
+  MutexSingleWriterAutoLock mon(mMutex);
   if (!mManager) {
     return media::TimeIntervals();
   }
@@ -371,6 +372,7 @@ void MediaSourceTrackDemuxer::BreakCycles() {
 
 RefPtr<MediaSourceTrackDemuxer::SeekPromise> MediaSourceTrackDemuxer::DoSeek(
     const TimeUnit& aTime) {
+  mMutex.AssertOnWritingThread();
   if (!mManager) {
     return SeekPromise::CreateAndReject(
         MediaResult(NS_ERROR_DOM_MEDIA_CANCELED,
@@ -426,7 +428,7 @@ RefPtr<MediaSourceTrackDemuxer::SeekPromise> MediaSourceTrackDemuxer::DoSeek(
   }
   mReset = false;
   {
-    MutexAutoLock mon(mMutex);
+    MutexSingleWriterAutoLockOnThread(lock, mMutex);
     mNextRandomAccessPoint =
         mManager->GetNextRandomAccessPoint(mType, MediaSourceDemuxer::EOS_FUZZ);
   }
@@ -435,6 +437,7 @@ RefPtr<MediaSourceTrackDemuxer::SeekPromise> MediaSourceTrackDemuxer::DoSeek(
 
 RefPtr<MediaSourceTrackDemuxer::SamplesPromise>
 MediaSourceTrackDemuxer::DoGetSamples(int32_t aNumSamples) {
+  mMutex.AssertOnWritingThread();
   if (!mManager) {
     return SamplesPromise::CreateAndReject(
         MediaResult(NS_ERROR_DOM_MEDIA_CANCELED,
@@ -487,7 +490,7 @@ MediaSourceTrackDemuxer::DoGetSamples(int32_t aNumSamples) {
   RefPtr<SamplesHolder> samples = new SamplesHolder;
   samples->AppendSample(sample);
   {
-    MutexAutoLock mon(mMutex);  // spurious warning will be given
+    MutexSingleWriterAutoLockOnThread(lock, mMutex);
     // Diagnostic asserts for bug 1810396
     MOZ_DIAGNOSTIC_ASSERT(sample, "Invalid sample pointer found!");
     MOZ_DIAGNOSTIC_ASSERT(sample->HasValidTime(), "Invalid sample time found!");
@@ -505,6 +508,7 @@ MediaSourceTrackDemuxer::DoGetSamples(int32_t aNumSamples) {
 RefPtr<MediaSourceTrackDemuxer::SkipAccessPointPromise>
 MediaSourceTrackDemuxer::DoSkipToNextRandomAccessPoint(
     const TimeUnit& aTimeThreadshold) {
+  mMutex.AssertOnWritingThread();
   if (!mManager) {
     return SkipAccessPointPromise::CreateAndReject(
         SkipFailureHolder(MediaResult(NS_ERROR_DOM_MEDIA_CANCELED,
@@ -534,13 +538,13 @@ MediaSourceTrackDemuxer::DoSkipToNextRandomAccessPoint(
 }
 
 bool MediaSourceTrackDemuxer::HasManager(TrackBuffersManager* aManager) const {
-  MOZ_ASSERT(OnTaskQueue());
+  mMutex.AssertOnWritingThread();
   return mManager == aManager;
 }
 
 void MediaSourceTrackDemuxer::DetachManager() {
   MOZ_ASSERT(OnTaskQueue());
-  MutexAutoLock mon(mMutex);
+  MutexSingleWriterAutoLock mon(mMutex);
   mManager = nullptr;
 }
 
diff --git a/dom/media/mediasource/MediaSourceDemuxer.h b/dom/media/mediasource/MediaSourceDemuxer.h
index 177aae769b..fa25878af9 100644
--- a/dom/media/mediasource/MediaSourceDemuxer.h
+++ b/dom/media/mediasource/MediaSourceDemuxer.h
@@ -101,13 +101,16 @@ class MediaSourceDemuxer : public MediaDataDemuxer,
 
 class MediaSourceTrackDemuxer
     : public MediaTrackDemuxer,
-      public DecoderDoctorLifeLogger<MediaSourceTrackDemuxer> {
+      public DecoderDoctorLifeLogger<MediaSourceTrackDemuxer>,
+      public SingleWriterLockOwner {
  public:
   MediaSourceTrackDemuxer(MediaSourceDemuxer* aParent,
                           TrackInfo::TrackType aType,
                           TrackBuffersManager* aManager)
       MOZ_REQUIRES(aParent->mMutex);
 
+  bool OnWritingThread() const override { return OnTaskQueue(); }
+
   UniquePtr<TrackInfo> GetInfo() const override;
 
   RefPtr<SeekPromise> Seek(const media::TimeUnit& aTime) override;
@@ -146,12 +149,12 @@ class MediaSourceTrackDemuxer
 
   TrackInfo::TrackType mType;
   // Mutex protecting members below accessed from multiple threads.
-  Mutex mMutex MOZ_UNANNOTATED;
-  media::TimeUnit mNextRandomAccessPoint;
+  MutexSingleWriter mMutex;
+  media::TimeUnit mNextRandomAccessPoint MOZ_GUARDED_BY(mMutex);
   // Would be accessed in MFR's demuxer proxy task queue and TaskQueue, and
   // only be set on the TaskQueue. It can be accessed while on TaskQueue without
   // the need for the lock.
-  RefPtr<TrackBuffersManager> mManager;
+  RefPtr<TrackBuffersManager> mManager MOZ_GUARDED_BY(mMutex);
 
   // Only accessed on TaskQueue
   Maybe<RefPtr<MediaRawData>> mNextSample;
diff --git a/dom/media/metrics.yaml b/dom/media/metrics.yaml
index 58e525174b..3f735b0273 100644
--- a/dom/media/metrics.yaml
+++ b/dom/media/metrics.yaml
@@ -166,3 +166,27 @@ media.playback:
         description: True if the first frame is decoded by a hardware decoder.
         type: boolean
     expires: never
+  device_hardware_decoder_support:
+    type: labeled_boolean
+    description:
+      The results of hardware decoder support for different video codecs. True
+      means that codec can be decoded by hardware on user's device.
+    metadata:
+      tags:
+        - 'Core :: Audio/Video: Playback'
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1892516
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1892516#c4
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - media-alerts@mozilla.com
+    expires: never
+    labels:
+      - h264
+      - vp8
+      - vp9
+      - av1
+      - hevc
+    telemetry_mirror: MEDIA_DEVICE_HARDWARE_DECODING_SUPPORT
diff --git a/dom/media/moz.build b/dom/media/moz.build
index ac62e9b67e..7f256387c7 100644
--- a/dom/media/moz.build
+++ b/dom/media/moz.build
@@ -157,7 +157,7 @@ EXPORTS += [
     "FileBlockCache.h",
     "ForwardedInputTrack.h",
     "FrameStatistics.h",
-    "ImageToI420.h",
+    "ImageConversion.h",
     "Intervals.h",
     "MediaCache.h",
     "MediaContainerType.h",
@@ -190,7 +190,6 @@ EXPORTS += [
     "MediaTrackList.h",
     "MediaTrackListener.h",
     "MemoryBlockCache.h",
-    "MPSCQueue.h",
     "nsIDocumentActivity.h",
     "PrincipalChangeObserver.h",
     "PrincipalHandle.h",
@@ -237,6 +236,7 @@ EXPORTS.mozilla.dom += [
     "MediaDevices.h",
     "MediaStreamError.h",
     "MediaStreamTrack.h",
+    "MPSCQueue.h",
     "VideoPlaybackQuality.h",
     "VideoStreamTrack.h",
     "VideoTrack.h",
@@ -282,7 +282,7 @@ UNIFIED_SOURCES += [
     "GetUserMediaRequest.cpp",
     "GraphDriver.cpp",
     "GraphRunner.cpp",
-    "ImageToI420.cpp",
+    "ImageConversion.cpp",
     "MediaCache.cpp",
     "MediaContainerType.cpp",
     "MediaDecoder.cpp",
diff --git a/dom/media/ogg/OggDemuxer.cpp b/dom/media/ogg/OggDemuxer.cpp
index 3f14887617..db9477cf1c 100644
--- a/dom/media/ogg/OggDemuxer.cpp
+++ b/dom/media/ogg/OggDemuxer.cpp
@@ -2050,11 +2050,7 @@ nsresult OggDemuxer::SeekBisection(TrackInfo::TrackType aType,
           interval = 0;
           break;
         }
-
         backsteps = std::min(backsteps + 1, maxBackStep);
-        // We reset mustBackoff. If we still need to backoff further, it will
-        // be set to true again.
-        mustBackoff = false;
       } else {
         backsteps = 0;
       }
diff --git a/dom/media/platforms/EncoderConfig.cpp b/dom/media/platforms/EncoderConfig.cpp
index ed780b947c..2c32e4c2ff 100644
--- a/dom/media/platforms/EncoderConfig.cpp
+++ b/dom/media/platforms/EncoderConfig.cpp
@@ -7,6 +7,7 @@
 #include "EncoderConfig.h"
 #include "MP4Decoder.h"
 #include "VPXDecoder.h"
+#include "mozilla/dom/BindingUtils.h"
 
 namespace mozilla {
 
@@ -24,4 +25,45 @@ CodecType EncoderConfig::CodecTypeForMime(const nsACString& aMimeType) {
   return CodecType::Unknown;
 }
 
+const char* CodecTypeStrings[] = {
+    "BeginVideo", "H264", "VP8", "VP9",  "EndVideo", "Opus",   "Vorbis",
+    "Flac",       "AAC",  "PCM", "G722", "EndAudio", "Unknown"};
+
+nsCString EncoderConfig::ToString() const {
+  nsCString rv;
+  rv.Append(CodecTypeStrings[UnderlyingValue(mCodec)]);
+  rv.AppendLiteral(mBitrateMode == BitrateMode::Constant ? " (CBR)" : " (VBR)");
+  rv.AppendPrintf("%" PRIu32 "bps", mBitrate);
+  if (mUsage == Usage::Realtime) {
+    rv.AppendLiteral(", realtime");
+  } else {
+    rv.AppendLiteral(", record");
+  }
+  if (mCodec > CodecType::_BeginVideo_ && mCodec < CodecType::_EndVideo_) {
+    rv.AppendPrintf(" [%dx%d]", mSize.Width(), mSize.Height());
+    if (mHardwarePreference == HardwarePreference::RequireHardware) {
+      rv.AppendLiteral(", hw required");
+    } else if (mHardwarePreference == HardwarePreference::RequireSoftware) {
+      rv.AppendLiteral(", sw required");
+    } else {
+      rv.AppendLiteral(", hw: no preference");
+    }
+    rv.AppendPrintf(" format: %s", GetEnumString(mPixelFormat).get());
+    rv.AppendPrintf(" format (source): %s",
+                    GetEnumString(mSourcePixelFormat).get());
+    if (mScalabilityMode == ScalabilityMode::L1T2) {
+      rv.AppendLiteral(" (L1T2)");
+    } else if (mScalabilityMode == ScalabilityMode::L1T3) {
+      rv.AppendLiteral(" (L1T2)");
+    }
+    rv.AppendPrintf(", fps: %" PRIu8, mFramerate);
+    rv.AppendPrintf(", kf interval: %zu", mKeyframeInterval);
+  } else {
+    rv.AppendPrintf(", ch: %" PRIu32 ", %" PRIu32 "Hz", mNumberOfChannels,
+                    mSampleRate);
+  }
+  rv.AppendPrintf("(w/%s codec specific)", mCodecSpecific ? "" : "o");
+  return rv;
+};
+
 }  // namespace mozilla
diff --git a/dom/media/platforms/EncoderConfig.h b/dom/media/platforms/EncoderConfig.h
index e0da1709d6..15241b71c1 100644
--- a/dom/media/platforms/EncoderConfig.h
+++ b/dom/media/platforms/EncoderConfig.h
@@ -159,6 +159,8 @@ class EncoderConfig final {
 
   static CodecType CodecTypeForMime(const nsACString& aMimeType);
 
+  nsCString ToString() const;
+
   bool IsVideo() const {
     return mCodec > CodecType::_BeginVideo_ && mCodec < CodecType::_EndVideo_;
   }
diff --git a/dom/media/platforms/MediaCodecsSupport.cpp b/dom/media/platforms/MediaCodecsSupport.cpp
index 13c10ab389..1386e87a6c 100644
--- a/dom/media/platforms/MediaCodecsSupport.cpp
+++ b/dom/media/platforms/MediaCodecsSupport.cpp
@@ -195,15 +195,12 @@ CodecDefinition MCSInfo::GetCodecDefinition(const MediaCodec& aCodec) {
 }
 
 MediaCodecsSupport MCSInfo::GetMediaCodecsSupportEnum(
-    const MediaCodec& aCodec, const DecodeSupportSet& aSupport) {
-  if (aSupport.isEmpty()) {
-    return MediaCodecsSupport{};
-  }
+    const MediaCodec& aCodec, const DecodeSupport& aSupport) {
   const CodecDefinition cd = GetCodecDefinition(aCodec);
-  if (aSupport.contains(DecodeSupport::SoftwareDecode)) {
+  if (aSupport == DecodeSupport::SoftwareDecode) {
     return cd.swDecodeSupport;
   }
-  if (aSupport.contains(DecodeSupport::HardwareDecode)) {
+  if (aSupport == DecodeSupport::HardwareDecode) {
     return cd.hwDecodeSupport;
   }
   return MediaCodecsSupport::SENTINEL;
diff --git a/dom/media/platforms/MediaCodecsSupport.h b/dom/media/platforms/MediaCodecsSupport.h
index ead4426259..5176b4ecb2 100644
--- a/dom/media/platforms/MediaCodecsSupport.h
+++ b/dom/media/platforms/MediaCodecsSupport.h
@@ -183,7 +183,7 @@ class MCSInfo final {
   // Returns a MediaCodecsSupport enum corresponding to the provided
   // codec type and decode support level requested.
   static MediaCodecsSupport GetMediaCodecsSupportEnum(
-      const MediaCodec& aCodec, const DecodeSupportSet& aSupport);
+      const MediaCodec& aCodec, const DecodeSupport& aSupport);
 
   // Returns true if SW/HW decode enum for a given codec is present in the args.
   static bool SupportsSoftwareDecode(
diff --git a/dom/media/platforms/PDMFactory.cpp b/dom/media/platforms/PDMFactory.cpp
index 00f46385e2..f640ee4506 100644
--- a/dom/media/platforms/PDMFactory.cpp
+++ b/dom/media/platforms/PDMFactory.cpp
@@ -27,6 +27,7 @@
 #include "mozilla/RemoteDecoderManagerChild.h"
 #include "mozilla/RemoteDecoderModule.h"
 #include "mozilla/SharedThreadPool.h"
+#include "mozilla/StaticMutex.h"
 #include "mozilla/StaticPrefs_media.h"
 #include "mozilla/SyncRunnable.h"
 #include "mozilla/TaskQueue.h"
@@ -474,7 +475,7 @@ DecodeSupportSet PDMFactory::Supports(
 
 void PDMFactory::CreatePDMs() {
   if (StaticPrefs::media_use_blank_decoder()) {
-    CreateAndStartupPDM<BlankDecoderModule>();
+    StartupPDM(BlankDecoderModule::Create());
     // The Blank PDM SupportsMimeType reports true for all codecs; the creation
     // of its decoder is infallible. As such it will be used for all media, we
     // can stop creating more PDM from this point.
@@ -500,7 +501,7 @@ void PDMFactory::CreatePDMs() {
 void PDMFactory::CreateGpuPDMs() {
 #ifdef XP_WIN
   if (StaticPrefs::media_wmf_enabled()) {
-    CreateAndStartupPDM<WMFDecoderModule>();
+    StartupPDM(WMFDecoderModule::Create());
   }
 #endif
 }
@@ -529,12 +530,12 @@ void PDMFactory::CreateRddPDMs() {
 #ifdef XP_WIN
   if (StaticPrefs::media_wmf_enabled() &&
       StaticPrefs::media_rdd_wmf_enabled()) {
-    CreateAndStartupPDM<WMFDecoderModule>();
+    StartupPDM(WMFDecoderModule::Create());
   }
 #endif
 #ifdef MOZ_APPLEMEDIA
   if (StaticPrefs::media_rdd_applemedia_enabled()) {
-    CreateAndStartupPDM<AppleDecoderModule>();
+    StartupPDM(AppleDecoderModule::Create());
   }
 #endif
   StartupPDM(FFVPXRuntimeLinker::CreateDecoder());
@@ -546,7 +547,8 @@ void PDMFactory::CreateRddPDMs() {
         FFmpegRuntimeLinker::LinkStatusCode());
   }
 #endif
-  CreateAndStartupPDM<AgnosticDecoderModule>();
+  StartupPDM(AgnosticDecoderModule::Create(),
+             StaticPrefs::media_prefer_non_ffvpx());
 }
 
 void PDMFactory::CreateUtilityPDMs() {
@@ -555,13 +557,13 @@ void PDMFactory::CreateUtilityPDMs() {
   if (StaticPrefs::media_wmf_enabled() &&
       StaticPrefs::media_utility_wmf_enabled() &&
       aKind == ipc::SandboxingKind::UTILITY_AUDIO_DECODING_WMF) {
-    CreateAndStartupPDM<WMFDecoderModule>();
+    StartupPDM(WMFDecoderModule::Create());
   }
 #endif
 #ifdef MOZ_APPLEMEDIA
   if (StaticPrefs::media_utility_applemedia_enabled() &&
       aKind == ipc::SandboxingKind::UTILITY_AUDIO_DECODING_APPLE_MEDIA) {
-    CreateAndStartupPDM<AppleDecoderModule>();
+    StartupPDM(AppleDecoderModule::Create());
   }
 #endif
   if (aKind == ipc::SandboxingKind::GENERIC_UTILITY) {
@@ -582,12 +584,13 @@ void PDMFactory::CreateUtilityPDMs() {
                  StaticPrefs::media_android_media_codec_preferred());
     }
 #endif
-    CreateAndStartupPDM<AgnosticDecoderModule>();
+    StartupPDM(AgnosticDecoderModule::Create(),
+               StaticPrefs::media_prefer_non_ffvpx());
   }
 #ifdef MOZ_WMF_MEDIA_ENGINE
   if (aKind == ipc::SandboxingKind::MF_MEDIA_ENGINE_CDM) {
     if (StaticPrefs::media_wmf_media_engine_enabled()) {
-      CreateAndStartupPDM<MFMediaEngineDecoderModule>();
+      StartupPDM(MFMediaEngineDecoderModule::Create());
     }
   }
 #endif
@@ -595,31 +598,30 @@ void PDMFactory::CreateUtilityPDMs() {
 
 void PDMFactory::CreateContentPDMs() {
   if (StaticPrefs::media_gpu_process_decoder()) {
-    CreateAndStartupPDM<RemoteDecoderModule>(RemoteDecodeIn::GpuProcess);
+    StartupPDM(RemoteDecoderModule::Create(RemoteDecodeIn::GpuProcess));
   }
 
   if (StaticPrefs::media_rdd_process_enabled()) {
-    CreateAndStartupPDM<RemoteDecoderModule>(RemoteDecodeIn::RddProcess);
+    StartupPDM(RemoteDecoderModule::Create(RemoteDecodeIn::RddProcess));
   }
 
   if (StaticPrefs::media_utility_process_enabled()) {
 #ifdef MOZ_APPLEMEDIA
-    CreateAndStartupPDM<RemoteDecoderModule>(
-        RemoteDecodeIn::UtilityProcess_AppleMedia);
+    StartupPDM(
+        RemoteDecoderModule::Create(RemoteDecodeIn::UtilityProcess_AppleMedia));
 #endif
 #ifdef XP_WIN
-    CreateAndStartupPDM<RemoteDecoderModule>(
-        RemoteDecodeIn::UtilityProcess_WMF);
+    StartupPDM(RemoteDecoderModule::Create(RemoteDecodeIn::UtilityProcess_WMF));
 #endif
     // WMF and AppleMedia should be created before Generic because the order
     // affects what decoder module would be chose first.
-    CreateAndStartupPDM<RemoteDecoderModule>(
-        RemoteDecodeIn::UtilityProcess_Generic);
+    StartupPDM(
+        RemoteDecoderModule::Create(RemoteDecodeIn::UtilityProcess_Generic));
   }
 #ifdef MOZ_WMF_MEDIA_ENGINE
   if (StaticPrefs::media_wmf_media_engine_enabled()) {
-    CreateAndStartupPDM<RemoteDecoderModule>(
-        RemoteDecodeIn::UtilityProcess_MFMediaEngineCDM);
+    StartupPDM(RemoteDecoderModule::Create(
+        RemoteDecodeIn::UtilityProcess_MFMediaEngineCDM));
   }
 #endif
 
@@ -631,7 +633,7 @@ void PDMFactory::CreateContentPDMs() {
 #  ifdef MOZ_WMF
       if (!StaticPrefs::media_rdd_process_enabled() ||
           !StaticPrefs::media_rdd_wmf_enabled()) {
-        if (!CreateAndStartupPDM<WMFDecoderModule>()) {
+        if (!StartupPDM(WMFDecoderModule::Create())) {
           mFailureFlags += DecoderDoctorDiagnostics::Flags::WMFFailedToLoad;
         }
       }
@@ -642,11 +644,11 @@ void PDMFactory::CreateContentPDMs() {
 #endif
 
 #ifdef MOZ_APPLEMEDIA
-    CreateAndStartupPDM<AppleDecoderModule>();
+    StartupPDM(AppleDecoderModule::Create());
 #endif
 #ifdef MOZ_OMX
     if (StaticPrefs::media_omx_enabled()) {
-      CreateAndStartupPDM<OmxDecoderModule>();
+      StartupPDM(OmxDecoderModule::Create());
     }
 #endif
     StartupPDM(FFVPXRuntimeLinker::CreateDecoder());
@@ -658,7 +660,8 @@ void PDMFactory::CreateContentPDMs() {
     }
 #endif
 
-    CreateAndStartupPDM<AgnosticDecoderModule>();
+    StartupPDM(AgnosticDecoderModule::Create(),
+               StaticPrefs::media_prefer_non_ffvpx());
 #if !defined(MOZ_WIDGET_ANDROID)  // Still required for video?
   }
 #endif  // !defined(MOZ_WIDGET_ANDROID)
@@ -681,7 +684,7 @@ void PDMFactory::CreateContentPDMs() {
 void PDMFactory::CreateDefaultPDMs() {
 #ifdef XP_WIN
   if (StaticPrefs::media_wmf_enabled()) {
-    if (!CreateAndStartupPDM<WMFDecoderModule>()) {
+    if (!StartupPDM(WMFDecoderModule::Create())) {
       mFailureFlags += DecoderDoctorDiagnostics::Flags::WMFFailedToLoad;
     }
   } else if (StaticPrefs::media_decoder_doctor_wmf_disabled_is_failure()) {
@@ -690,11 +693,11 @@ void PDMFactory::CreateDefaultPDMs() {
 #endif
 
 #ifdef MOZ_APPLEMEDIA
-  CreateAndStartupPDM<AppleDecoderModule>();
+  StartupPDM(AppleDecoderModule::Create());
 #endif
 #ifdef MOZ_OMX
   if (StaticPrefs::media_omx_enabled()) {
-    CreateAndStartupPDM<OmxDecoderModule>();
+    StartupPDM(OmxDecoderModule::Create());
   }
 #endif
   StartupPDM(FFVPXRuntimeLinker::CreateDecoder());
@@ -712,7 +715,8 @@ void PDMFactory::CreateDefaultPDMs() {
   }
 #endif
 
-  CreateAndStartupPDM<AgnosticDecoderModule>();
+  StartupPDM(AgnosticDecoderModule::Create(),
+             StaticPrefs::media_prefer_non_ffvpx());
 
   if (StaticPrefs::media_gmp_decoder_enabled() &&
       !StartupPDM(GMPDecoderModule::Create(),
@@ -783,9 +787,11 @@ void PDMFactory::SetCDMProxy(CDMProxy* aProxy) {
   mEMEPDM = MakeRefPtr<EMEDecoderModule>(aProxy, m);
 }
 
+StaticMutex sSupportedMutex;
+
 /* static */
 media::MediaCodecsSupported PDMFactory::Supported(bool aForceRefresh) {
-  MOZ_ASSERT(NS_IsMainThread());
+  StaticMutexAutoLock lock(sSupportedMutex);
 
   static auto calculate = []() {
     auto pdm = MakeRefPtr<PDMFactory>();
diff --git a/dom/media/platforms/PDMFactory.h b/dom/media/platforms/PDMFactory.h
index c56c11c506..9a4d4ff6b9 100644
--- a/dom/media/platforms/PDMFactory.h
+++ b/dom/media/platforms/PDMFactory.h
@@ -79,11 +79,6 @@ class PDMFactory final {
   void CreateContentPDMs();
   void CreateDefaultPDMs();
 
-  template <typename DECODER_MODULE, typename... ARGS>
-  bool CreateAndStartupPDM(ARGS&&... aArgs) {
-    return StartupPDM(DECODER_MODULE::Create(std::forward<ARGS>(aArgs)...));
-  }
-
   // Startup the provided PDM and add it to our list if successful.
   bool StartupPDM(already_AddRefed<PlatformDecoderModule> aPDM,
                   bool aInsertAtBeginning = false);
diff --git a/dom/media/platforms/SimpleMap.h b/dom/media/platforms/SimpleMap.h
index c26bff1e9a..635ba6f085 100644
--- a/dom/media/platforms/SimpleMap.h
+++ b/dom/media/platforms/SimpleMap.h
@@ -5,49 +5,101 @@
 #ifndef mozilla_SimpleMap_h
 #define mozilla_SimpleMap_h
 
+#include <utility>
+
+#include "mozilla/Maybe.h"
 #include "mozilla/Mutex.h"
 #include "nsTArray.h"
 
-#include <utility>
-
 namespace mozilla {
 
-template <typename T>
+struct ThreadSafePolicy {
+  struct PolicyLock {
+    explicit PolicyLock(const char* aName) : mMutex(aName) {}
+    Mutex mMutex MOZ_UNANNOTATED;
+  };
+  PolicyLock& mPolicyLock;
+  explicit ThreadSafePolicy(PolicyLock& aPolicyLock)
+      : mPolicyLock(aPolicyLock) {
+    mPolicyLock.mMutex.Lock();
+  }
+  ~ThreadSafePolicy() { mPolicyLock.mMutex.Unlock(); }
+};
+
+struct NoOpPolicy {
+  struct PolicyLock {
+    explicit PolicyLock(const char*) {}
+  };
+  explicit NoOpPolicy(PolicyLock&) {}
+  ~NoOpPolicy() = default;
+};
+
+// An map employing an array instead of a hash table to optimize performance,
+// particularly beneficial when the number of expected items in the map is
+// small.
+template <typename K, typename V, typename Policy = NoOpPolicy>
 class SimpleMap {
- public:
-  typedef std::pair<int64_t, T> Element;
+  using ElementType = std::pair<K, V>;
+  using MapType = AutoTArray<ElementType, 16>;
 
-  SimpleMap() : mMutex("SimpleMap") {}
+ public:
+  SimpleMap() : mLock("SimpleMap"){};
 
+  // Check if aKey is in the map.
+  bool Contains(const K& aKey) {
+    struct Comparator {
+      bool Equals(const ElementType& aElement, const K& aKey) const {
+        return aElement.first == aKey;
+      }
+    };
+    Policy guard(mLock);
+    return mMap.Contains(aKey, Comparator());
+  }
   // Insert Key and Value pair at the end of our map.
-  void Insert(int64_t aKey, const T& aValue) {
-    MutexAutoLock lock(mMutex);
+  void Insert(const K& aKey, const V& aValue) {
+    Policy guard(mLock);
     mMap.AppendElement(std::make_pair(aKey, aValue));
   }
   // Sets aValue matching aKey and remove it from the map if found.
   // The element returned is the first one found.
   // Returns true if found, false otherwise.
-  bool Find(int64_t aKey, T& aValue) {
-    MutexAutoLock lock(mMutex);
+  bool Find(const K& aKey, V& aValue) {
+    if (Maybe<V> v = Take(aKey)) {
+      aValue = v.extract();
+      return true;
+    }
+    return false;
+  }
+  // Take the value matching aKey and remove it from the map if found.
+  Maybe<V> Take(const K& aKey) {
+    Policy guard(mLock);
     for (uint32_t i = 0; i < mMap.Length(); i++) {
-      Element& element = mMap[i];
+      ElementType& element = mMap[i];
       if (element.first == aKey) {
-        aValue = element.second;
+        Maybe<V> value = Some(element.second);
         mMap.RemoveElementAt(i);
-        return true;
+        return value;
       }
     }
-    return false;
+    return Nothing();
   }
   // Remove all elements of the map.
   void Clear() {
-    MutexAutoLock lock(mMutex);
+    Policy guard(mLock);
     mMap.Clear();
   }
+  // Iterate through all elements of the map and call the function F.
+  template <typename F>
+  void ForEach(F&& aCallback) {
+    Policy guard(mLock);
+    for (const auto& element : mMap) {
+      aCallback(element.first, element.second);
+    }
+  }
 
  private:
-  Mutex mMutex MOZ_UNANNOTATED;  // To protect mMap.
-  AutoTArray<Element, 16> mMap;
+  typename Policy::PolicyLock mLock;
+  MapType mMap;
 };
 
 }  // namespace mozilla
diff --git a/dom/media/platforms/agnostic/AOMDecoder.cpp b/dom/media/platforms/agnostic/AOMDecoder.cpp
index cb7f784848..284c209d51 100644
--- a/dom/media/platforms/agnostic/AOMDecoder.cpp
+++ b/dom/media/platforms/agnostic/AOMDecoder.cpp
@@ -284,6 +284,8 @@ RefPtr<MediaDataDecoder::DecodePromise> AOMDecoder::ProcessDecode(
           aStage.SetYUVColorSpace(b.mYUVColorSpace);
           aStage.SetColorRange(b.mColorRange);
           aStage.SetColorDepth(b.mColorDepth);
+          aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                        v->GetEndTime().ToMicroseconds());
         });
     results.AppendElement(std::move(v));
   }
diff --git a/dom/media/platforms/agnostic/DAV1DDecoder.cpp b/dom/media/platforms/agnostic/DAV1DDecoder.cpp
index e93ceb27a1..e7339dd8a9 100644
--- a/dom/media/platforms/agnostic/DAV1DDecoder.cpp
+++ b/dom/media/platforms/agnostic/DAV1DDecoder.cpp
@@ -352,6 +352,8 @@ Result<already_AddRefed<VideoData>, MediaResult> DAV1DDecoder::ConstructImage(
     aStage.SetYUVColorSpace(b.mYUVColorSpace);
     aStage.SetColorRange(b.mColorRange);
     aStage.SetColorDepth(b.mColorDepth);
+    aStage.SetStartTimeAndEndTime(aPicture.m.timestamp,
+                                  aPicture.m.timestamp + aPicture.m.duration);
   });
 
   return VideoData::CreateAndCopyData(
diff --git a/dom/media/platforms/agnostic/TheoraDecoder.cpp b/dom/media/platforms/agnostic/TheoraDecoder.cpp
index d60093a204..30dde14697 100644
--- a/dom/media/platforms/agnostic/TheoraDecoder.cpp
+++ b/dom/media/platforms/agnostic/TheoraDecoder.cpp
@@ -236,6 +236,8 @@ RefPtr<MediaDataDecoder::DecodePromise> TheoraDecoder::ProcessDecode(
         aStage.SetYUVColorSpace(b.mYUVColorSpace);
         aStage.SetColorRange(b.mColorRange);
         aStage.SetColorDepth(b.mColorDepth);
+        aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                      v->GetEndTime().ToMicroseconds());
       });
     });
 
diff --git a/dom/media/platforms/agnostic/VPXDecoder.cpp b/dom/media/platforms/agnostic/VPXDecoder.cpp
index 1b07606bd5..637c6a6452 100644
--- a/dom/media/platforms/agnostic/VPXDecoder.cpp
+++ b/dom/media/platforms/agnostic/VPXDecoder.cpp
@@ -272,6 +272,8 @@ RefPtr<MediaDataDecoder::DecodePromise> VPXDecoder::ProcessDecode(
         aStage.SetYUVColorSpace(b.mYUVColorSpace);
         aStage.SetColorRange(b.mColorRange);
         aStage.SetColorDepth(b.mColorDepth);
+        aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                      v->GetEndTime().ToMicroseconds());
       });
     });
 
diff --git a/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.cpp b/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.cpp
index b964036a4a..06b5f7c476 100644
--- a/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.cpp
+++ b/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.cpp
@@ -114,15 +114,17 @@ void GMPVideoDecoder::Decoded(GMPVideoi420Frame* aDecodedFrame) {
 
   RefPtr<VideoData> v = r.unwrap();
   MOZ_ASSERT(v);
-  mPerformanceRecorder.Record(static_cast<int64_t>(decodedFrame->Timestamp()),
-                              [&](DecodeStage& aStage) {
-                                aStage.SetImageFormat(DecodeStage::YUV420P);
-                                aStage.SetResolution(decodedFrame->Width(),
-                                                     decodedFrame->Height());
-                                aStage.SetYUVColorSpace(b.mYUVColorSpace);
-                                aStage.SetColorDepth(b.mColorDepth);
-                                aStage.SetColorRange(b.mColorRange);
-                              });
+  mPerformanceRecorder.Record(
+      static_cast<int64_t>(decodedFrame->Timestamp()),
+      [&](DecodeStage& aStage) {
+        aStage.SetImageFormat(DecodeStage::YUV420P);
+        aStage.SetResolution(decodedFrame->Width(), decodedFrame->Height());
+        aStage.SetYUVColorSpace(b.mYUVColorSpace);
+        aStage.SetColorDepth(b.mColorDepth);
+        aStage.SetColorRange(b.mColorRange);
+        aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                      v->GetEndTime().ToMicroseconds());
+      });
 
   if (mReorderFrames) {
     mReorderQueue.Push(std::move(v));
@@ -130,11 +132,11 @@ void GMPVideoDecoder::Decoded(GMPVideoi420Frame* aDecodedFrame) {
     mUnorderedData.AppendElement(std::move(v));
   }
 
-    if (mSamples.IsEmpty()) {
-      // If we have no remaining samples in the table, then we have processed
-      // all outstanding decode requests.
-      ProcessReorderQueue(mDecodePromise, __func__);
-    }
+  if (mSamples.IsEmpty()) {
+    // If we have no remaining samples in the table, then we have processed
+    // all outstanding decode requests.
+    ProcessReorderQueue(mDecodePromise, __func__);
+  }
 }
 
 void GMPVideoDecoder::ReceivedDecodedReferenceFrame(const uint64_t aPictureId) {
@@ -201,7 +203,7 @@ void GMPVideoDecoder::Terminated() {
 }
 
 void GMPVideoDecoder::ProcessReorderQueue(
-    MozPromiseHolder<DecodePromise>& aPromise, const char* aMethodName) {
+    MozPromiseHolder<DecodePromise>& aPromise, StaticString aMethodName) {
   if (aPromise.IsEmpty()) {
     return;
   }
diff --git a/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.h b/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.h
index 1f0f59c685..6f831e5fbc 100644
--- a/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.h
+++ b/dom/media/platforms/agnostic/gmp/GMPVideoDecoder.h
@@ -72,7 +72,7 @@ class GMPVideoDecoder final : public MediaDataDecoder,
   virtual GMPUniquePtr<GMPVideoEncodedFrame> CreateFrame(MediaRawData* aSample);
   virtual const VideoInfo& GetConfig() const;
   void ProcessReorderQueue(MozPromiseHolder<DecodePromise>& aPromise,
-                           const char* aMethodName);
+                           StaticString aMethodName);
 
  private:
   ~GMPVideoDecoder() = default;
diff --git a/dom/media/platforms/android/AndroidDecoderModule.cpp b/dom/media/platforms/android/AndroidDecoderModule.cpp
index fff8669a74..21d0ede270 100644
--- a/dom/media/platforms/android/AndroidDecoderModule.cpp
+++ b/dom/media/platforms/android/AndroidDecoderModule.cpp
@@ -64,21 +64,28 @@ AndroidDecoderModule::AndroidDecoderModule(CDMProxy* aProxy) {
   mProxy = static_cast<MediaDrmCDMProxy*>(aProxy);
 }
 
-StaticAutoPtr<nsTArray<nsCString>> AndroidDecoderModule::sSupportedSwMimeTypes;
-StaticAutoPtr<nsTArray<nsCString>> AndroidDecoderModule::sSupportedHwMimeTypes;
-StaticAutoPtr<MediaCodecsSupported> AndroidDecoderModule::sSupportedCodecs;
+/* static */ bool AndroidDecoderModule::AreSupportedMimeTypesReady() {
+  StaticMutexAutoLock lock(sMutex);
+  return sSupportedSwMimeTypes && sSupportedHwMimeTypes;
+}
+
+/* static */ bool AndroidDecoderModule::IsSupportedCodecsReady() {
+  StaticMutexAutoLock lock(sMutex);
+  return sSupportedCodecs;
+}
 
 /* static */
 media::MediaCodecsSupported AndroidDecoderModule::GetSupportedCodecs() {
-  if (!sSupportedSwMimeTypes || !sSupportedHwMimeTypes || !sSupportedCodecs) {
+  if (!AreSupportedMimeTypesReady() || !IsSupportedCodecsReady()) {
     SetSupportedMimeTypes();
   }
+  StaticMutexAutoLock lock(sMutex);
   return *sSupportedCodecs;
 }
 
 DecodeSupportSet AndroidDecoderModule::SupportsMimeType(
     const nsACString& aMimeType) {
-  if (!sSupportedSwMimeTypes) {
+  if (!AreSupportedMimeTypesReady()) {
     SetSupportedMimeTypes();
   }
 
@@ -135,13 +142,16 @@ DecodeSupportSet AndroidDecoderModule::SupportsMimeType(
 
   // If a codec has no special handling or can't be determined from the
   // MIME type string, check if the MIME type string itself is supported.
-  if (sSupportedHwMimeTypes &&
-      sSupportedHwMimeTypes->Contains(TranslateMimeType(aMimeType))) {
-    return DecodeSupport::HardwareDecode;
-  }
-  if (sSupportedSwMimeTypes &&
-      sSupportedSwMimeTypes->Contains(TranslateMimeType(aMimeType))) {
-    return DecodeSupport::SoftwareDecode;
+  {
+    StaticMutexAutoLock lock(sMutex);
+    if (sSupportedHwMimeTypes &&
+        sSupportedHwMimeTypes->Contains(TranslateMimeType(aMimeType))) {
+      return DecodeSupport::HardwareDecode;
+    }
+    if (sSupportedSwMimeTypes &&
+        sSupportedSwMimeTypes->Contains(TranslateMimeType(aMimeType))) {
+      return DecodeSupport::SoftwareDecode;
+    }
   }
   return media::DecodeSupportSet{};
 }
@@ -179,24 +189,45 @@ void AndroidDecoderModule::SetSupportedMimeTypes() {
 // Inbound MIME types prefixed with SW/HW need to be processed
 void AndroidDecoderModule::SetSupportedMimeTypes(
     nsTArray<nsCString>&& aSupportedTypes) {
+  StaticMutexAutoLock lock(sMutex);
   // Return if support is already cached
   if (sSupportedSwMimeTypes && sSupportedHwMimeTypes && sSupportedCodecs) {
     return;
   }
   if (!sSupportedSwMimeTypes) {
     sSupportedSwMimeTypes = new nsTArray<nsCString>;
-    ClearOnShutdown(&sSupportedSwMimeTypes);
+    if (NS_IsMainThread()) {
+      ClearOnShutdown(&sSupportedSwMimeTypes);
+    } else {
+      Unused << NS_DispatchToMainThread(NS_NewRunnableFunction(__func__, []() {
+        StaticMutexAutoLock lock(sMutex);
+        ClearOnShutdown(&sSupportedSwMimeTypes);
+      }));
+    }
   }
   if (!sSupportedHwMimeTypes) {
     sSupportedHwMimeTypes = new nsTArray<nsCString>;
-    ClearOnShutdown(&sSupportedHwMimeTypes);
+    if (NS_IsMainThread()) {
+      ClearOnShutdown(&sSupportedHwMimeTypes);
+    } else {
+      Unused << NS_DispatchToMainThread(NS_NewRunnableFunction(__func__, []() {
+        StaticMutexAutoLock lock(sMutex);
+        ClearOnShutdown(&sSupportedHwMimeTypes);
+      }));
+    }
   }
   if (!sSupportedCodecs) {
     sSupportedCodecs = new MediaCodecsSupported();
-    ClearOnShutdown(&sSupportedCodecs);
+    if (NS_IsMainThread()) {
+      ClearOnShutdown(&sSupportedCodecs);
+    } else {
+      Unused << NS_DispatchToMainThread(NS_NewRunnableFunction(__func__, []() {
+        StaticMutexAutoLock lock(sMutex);
+        ClearOnShutdown(&sSupportedCodecs);
+      }));
+    }
   }
 
-  DecodeSupportSet support;
   // Process each MIME type string
   for (const auto& s : aSupportedTypes) {
     // Verify MIME type string present
@@ -212,12 +243,13 @@ void AndroidDecoderModule::SetSupportedMimeTypes(
 
     // Extract SW/HW support prefix
     const auto caps = Substring(s, 0, 2);
+    DecodeSupport support{};
     if (caps == "SW"_ns) {
       sSupportedSwMimeTypes->AppendElement(mimeType);
-      support += DecodeSupport::SoftwareDecode;
+      support = DecodeSupport::SoftwareDecode;
     } else if (caps == "HW"_ns) {
       sSupportedHwMimeTypes->AppendElement(mimeType);
-      support += DecodeSupport::HardwareDecode;
+      support = DecodeSupport::HardwareDecode;
     } else {
       SLOG("Error parsing acceleration info from JNI codec string %s",
            s.Data());
diff --git a/dom/media/platforms/android/AndroidDecoderModule.h b/dom/media/platforms/android/AndroidDecoderModule.h
index 37a0f08588..5550e123f3 100644
--- a/dom/media/platforms/android/AndroidDecoderModule.h
+++ b/dom/media/platforms/android/AndroidDecoderModule.h
@@ -54,16 +54,25 @@ class AndroidDecoderModule : public PlatformDecoderModule {
  private:
   explicit AndroidDecoderModule(CDMProxy* aProxy = nullptr);
   virtual ~AndroidDecoderModule() = default;
+
+  static bool AreSupportedMimeTypesReady();
+  static bool IsSupportedCodecsReady();
+
   RefPtr<MediaDrmCDMProxy> mProxy;
   // SW compatible MIME type strings
-  static StaticAutoPtr<nsTArray<nsCString>> sSupportedSwMimeTypes;
+  static inline StaticAutoPtr<nsTArray<nsCString>> sSupportedSwMimeTypes
+      MOZ_GUARDED_BY(sMutex);
   // HW compatible MIME type strings
-  static StaticAutoPtr<nsTArray<nsCString>> sSupportedHwMimeTypes;
+  static inline StaticAutoPtr<nsTArray<nsCString>> sSupportedHwMimeTypes
+      MOZ_GUARDED_BY(sMutex);
   // EnumSet containing SW/HW codec support information parsed from
   // MIME type strings. If a specific codec could not be determined
   // it will not be included in this EnumSet. All supported MIME type strings
   // are still stored in sSupportedSwMimeTypes and sSupportedHwMimeTypes.
-  static StaticAutoPtr<media::MediaCodecsSupported> sSupportedCodecs;
+  static inline StaticAutoPtr<media::MediaCodecsSupported> sSupportedCodecs
+      MOZ_GUARDED_BY(sMutex);
+
+  static inline StaticMutex sMutex;
 };
 
 extern LazyLogModule sAndroidDecoderModuleLog;
diff --git a/dom/media/platforms/android/AndroidEncoderModule.cpp b/dom/media/platforms/android/AndroidEncoderModule.cpp
index 15b23330e2..23c76cba5f 100644
--- a/dom/media/platforms/android/AndroidEncoderModule.cpp
+++ b/dom/media/platforms/android/AndroidEncoderModule.cpp
@@ -29,6 +29,9 @@ bool AndroidEncoderModule::Supports(const EncoderConfig& aConfig) const {
   if (!CanLikelyEncode(aConfig)) {
     return false;
   }
+  if (aConfig.mScalabilityMode != ScalabilityMode::None) {
+    return false;
+  }
   return SupportsCodec(aConfig.mCodec);
 }
 
diff --git a/dom/media/platforms/android/RemoteDataDecoder.cpp b/dom/media/platforms/android/RemoteDataDecoder.cpp
index f0fbc7a77c..260b70abdb 100644
--- a/dom/media/platforms/android/RemoteDataDecoder.cpp
+++ b/dom/media/platforms/android/RemoteDataDecoder.cpp
@@ -527,6 +527,8 @@ class RemoteVideoDecoder final : public RemoteDataDecoder {
         });
         aStage.SetResolution(v->mImage->GetSize().Width(),
                              v->mImage->GetSize().Height());
+        aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                      v->GetEndTime().ToMicroseconds());
       });
 
       RemoteDataDecoder::UpdateOutputStatus(std::move(v));
@@ -574,7 +576,7 @@ class RemoteVideoDecoder final : public RemoteDataDecoder {
   bool mIsHardwareAccelerated = false;
   // Accessed on mThread and reader's thread. SimpleMap however is
   // thread-safe, so it's okay to do so.
-  SimpleMap<InputInfo> mInputInfos;
+  SimpleMap<int64_t, InputInfo, ThreadSafePolicy> mInputInfos;
   // Only accessed on mThread.
   Maybe<TimeUnit> mSeekTarget;
   Maybe<TimeUnit> mLatestOutputTime;
diff --git a/dom/media/platforms/apple/AppleEncoderModule.cpp b/dom/media/platforms/apple/AppleEncoderModule.cpp
index e18d9a05c4..6fa4a53ab5 100644
--- a/dom/media/platforms/apple/AppleEncoderModule.cpp
+++ b/dom/media/platforms/apple/AppleEncoderModule.cpp
@@ -27,6 +27,9 @@ bool AppleEncoderModule::Supports(const EncoderConfig& aConfig) const {
   if (!CanLikelyEncode(aConfig)) {
     return false;
   }
+  if (aConfig.mScalabilityMode != ScalabilityMode::None) {
+    return false;
+  }
   return aConfig.mCodec == CodecType::H264;
 }
 
diff --git a/dom/media/platforms/apple/AppleVTDecoder.cpp b/dom/media/platforms/apple/AppleVTDecoder.cpp
index 6a70ed19d5..17d462c8c9 100644
--- a/dom/media/platforms/apple/AppleVTDecoder.cpp
+++ b/dom/media/platforms/apple/AppleVTDecoder.cpp
@@ -575,6 +575,8 @@ void AppleVTDecoder::OutputFrame(CVPixelBufferRef aImage,
         aStage.SetColorDepth(mColorDepth);
         aStage.SetYUVColorSpace(mColorSpace);
         aStage.SetColorRange(mColorRange);
+        aStage.SetStartTimeAndEndTime(data->mTime.ToMicroseconds(),
+                                      data->GetEndTime().ToMicroseconds());
       });
 
   // Frames come out in DTS order but we need to output them
diff --git a/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp b/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp
index 1e8e488e25..381cbf71a8 100644
--- a/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegAudioDecoder.cpp
@@ -5,6 +5,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "FFmpegAudioDecoder.h"
+#include "FFmpegUtils.h"
 #include "AudioSampleFormat.h"
 #include "FFmpegLog.h"
 #include "TimeUnits.h"
@@ -250,7 +251,7 @@ MediaResult FFmpegAudioDecoder<LIBAV_VER>::PostProcessOutput(
              aSample->mDuration.ToString().get(),
              mLib->av_get_sample_fmt_name(mFrame->format));
 
-  uint32_t numChannels = mCodecContext->channels;
+  uint32_t numChannels = ChannelCount(mCodecContext);
   uint32_t samplingRate = mCodecContext->sample_rate;
   if (!numChannels) {
     numChannels = mAudioInfo.mChannels;
@@ -284,7 +285,7 @@ MediaResult FFmpegAudioDecoder<LIBAV_VER>::PostProcessOutput(
 
   RefPtr<AudioData> data =
       new AudioData(aSample->mOffset, pts, std::move(audio), numChannels,
-                    samplingRate, mCodecContext->channel_layout);
+                    samplingRate, numChannels);
   MOZ_ASSERT(duration == data->mDuration, "must be equal");
   aResults.AppendElement(std::move(data));
 
@@ -395,16 +396,23 @@ MediaResult FFmpegAudioDecoder<LIBAV_VER>::DoDecode(MediaRawData* aSample,
                                                     DecodedData& aResults) {
   MOZ_ASSERT(mTaskQueue->IsOnCurrentThread());
   PROCESS_DECODE_LOG(aSample);
-  AVPacket packet;
-  mLib->av_init_packet(&packet);
+  AVPacket* packet;
+#if LIBAVCODEC_VERSION_MAJOR >= 61
+  packet = mLib->av_packet_alloc();
+  auto freePacket = MakeScopeExit([&] { mLib->av_packet_free(&packet); });
+#else
+  AVPacket packet_mem;
+  packet = &packet_mem;
+  mLib->av_init_packet(packet);
+#endif
 
   FFMPEG_LOG("FFmpegAudioDecoder::DoDecode: %d bytes, [%s,%s] (Duration: %s)",
              aSize, aSample->mTime.ToString().get(),
              aSample->GetEndTime().ToString().get(),
              aSample->mDuration.ToString().get());
 
-  packet.data = const_cast<uint8_t*>(aData);
-  packet.size = aSize;
+  packet->data = const_cast<uint8_t*>(aData);
+  packet->size = aSize;
 
   if (aGotFrame) {
     *aGotFrame = false;
@@ -418,8 +426,9 @@ MediaResult FFmpegAudioDecoder<LIBAV_VER>::DoDecode(MediaRawData* aSample,
   }
 
   bool decoded = false;
-  auto rv = DecodeUsingFFmpeg(&packet, decoded, aSample, aResults, aGotFrame);
+  auto rv = DecodeUsingFFmpeg(packet, decoded, aSample, aResults, aGotFrame);
   NS_ENSURE_SUCCESS(rv, rv);
+
   return NS_OK;
 }
 
diff --git a/dom/media/platforms/ffmpeg/FFmpegAudioEncoder.cpp b/dom/media/platforms/ffmpeg/FFmpegAudioEncoder.cpp
index 28db667732..284d1067a9 100644
--- a/dom/media/platforms/ffmpeg/FFmpegAudioEncoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegAudioEncoder.cpp
@@ -101,12 +101,13 @@ nsresult FFmpegAudioEncoder<LIBAV_VER>::InitSpecific() {
 
   // And now the audio-specific part
   mCodecContext->sample_rate = AssertedCast<int>(mConfig.mSampleRate);
-  mCodecContext->channels = AssertedCast<int>(mConfig.mNumberOfChannels);
 
 #if LIBAVCODEC_VERSION_MAJOR >= 60
   // Gecko's ordering intentionnally matches ffmepg's ordering
   mLib->av_channel_layout_default(&mCodecContext->ch_layout,
-                                  AssertedCast<int>(mCodecContext->channels));
+                                  AssertedCast<int>(mConfig.mNumberOfChannels));
+#else
+  mCodecContext->channels = AssertedCast<int>(mConfig.mNumberOfChannels);
 #endif
 
   switch (mConfig.mCodec) {
@@ -206,7 +207,7 @@ FFmpegAudioEncoder<LIBAV_VER>::EncodeOnePacket(Span<float> aSamples,
   // packets smaller than the packet size are allowed when draining.
   MOZ_ASSERT(AssertedCast<int>(frameCount) <= mCodecContext->frame_size);
 
-  mFrame->channels = AssertedCast<int>(mConfig.mNumberOfChannels);
+  ChannelCount(mFrame) = AssertedCast<int>(mConfig.mNumberOfChannels);
 
 #  if LIBAVCODEC_VERSION_MAJOR >= 60
   int rv = mLib->av_channel_layout_copy(&mFrame->ch_layout,
@@ -229,10 +230,10 @@ FFmpegAudioEncoder<LIBAV_VER>::EncodeOnePacket(Span<float> aSamples,
       AVRational{.num = 1, .den = static_cast<int>(mConfig.mSampleRate)};
 #  endif
   mFrame->pts = aPts.ToTicksAtRate(mConfig.mSampleRate);
-  mFrame->pkt_duration = frameCount;
 #  if LIBAVCODEC_VERSION_MAJOR >= 60
   mFrame->duration = frameCount;
 #  else
+  mFrame->pkt_duration = frameCount;
   // Save duration in the time_base unit.
   mDurationMap.Insert(mFrame->pts, mFrame->pkt_duration);
 #  endif
@@ -258,7 +259,7 @@ FFmpegAudioEncoder<LIBAV_VER>::EncodeOnePacket(Span<float> aSamples,
     MOZ_ASSERT(mCodecContext->sample_fmt == AV_SAMPLE_FMT_FLTP);
     for (uint32_t i = 0; i < mConfig.mNumberOfChannels; i++) {
       DeinterleaveAndConvertBuffer(aSamples.data(), mFrame->nb_samples,
-                                   mFrame->channels, mFrame->data);
+                                   mConfig.mNumberOfChannels, mFrame->data);
     }
   }
 
diff --git a/dom/media/platforms/ffmpeg/FFmpegDataDecoder.cpp b/dom/media/platforms/ffmpeg/FFmpegDataDecoder.cpp
index 30422987cf..e86ff63dba 100644
--- a/dom/media/platforms/ffmpeg/FFmpegDataDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegDataDecoder.cpp
@@ -231,11 +231,22 @@ FFmpegDataDecoder<LIBAV_VER>::ProcessDrain() {
   empty->mTimecode = mLastInputDts;
   bool gotFrame = false;
   DecodedData results;
-  // When draining the FFmpeg decoder will return either a single frame at a
-  // time until gotFrame is set to false; or return a block of frames with
-  // NS_ERROR_DOM_MEDIA_END_OF_STREAM
-  while (NS_SUCCEEDED(DoDecode(empty, &gotFrame, results)) && gotFrame) {
-  }
+  // When draining the underlying FFmpeg decoder without encountering any
+  // problems, DoDecode will either return a single frame at a time until
+  // gotFrame is set to false, or it will return a block of frames with
+  // NS_ERROR_DOM_MEDIA_END_OF_STREAM (EOS). However, if any issue arises, such
+  // as pending data in the pipeline being corrupt or invalid, non-EOS errors
+  // like NS_ERROR_DOM_MEDIA_DECODE_ERR will be returned and must be handled
+  // accordingly.
+  do {
+    MediaResult r = DoDecode(empty, &gotFrame, results);
+    if (NS_FAILED(r)) {
+      if (r.Code() == NS_ERROR_DOM_MEDIA_END_OF_STREAM) {
+        break;
+      }
+      return DecodePromise::CreateAndReject(r, __func__);
+    }
+  } while (gotFrame);
   return DecodePromise::CreateAndResolve(std::move(results), __func__);
 }
 
diff --git a/dom/media/platforms/ffmpeg/FFmpegDataEncoder.h b/dom/media/platforms/ffmpeg/FFmpegDataEncoder.h
index de80ed36ca..c9a4585913 100644
--- a/dom/media/platforms/ffmpeg/FFmpegDataEncoder.h
+++ b/dom/media/platforms/ffmpeg/FFmpegDataEncoder.h
@@ -28,7 +28,7 @@ class FFmpegDataEncoder : public MediaDataEncoder {};
 
 template <>
 class FFmpegDataEncoder<LIBAV_VER> : public MediaDataEncoder {
-  using DurationMap = SimpleMap<int64_t>;
+  using DurationMap = SimpleMap<int64_t, int64_t, ThreadSafePolicy>;
 
  public:
   FFmpegDataEncoder(const FFmpegLibWrapper* aLib, AVCodecID aCodecID,
diff --git a/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp b/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
index b6e734268d..cb507a0810 100644
--- a/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegEncoderModule.cpp
@@ -20,6 +20,13 @@ bool FFmpegEncoderModule<V>::Supports(const EncoderConfig& aConfig) const {
   if (!CanLikelyEncode(aConfig)) {
     return false;
   }
+  // We only support L1T2 and L1T3 ScalabilityMode in VP8 and VP9 encoders via
+  // libvpx for now.
+  if ((aConfig.mScalabilityMode != ScalabilityMode::None)) {
+    if (aConfig.mCodec != CodecType::VP8 && aConfig.mCodec != CodecType::VP9) {
+      return false;
+    }
+  }
   return SupportsCodec(aConfig.mCodec) != AV_CODEC_ID_NONE;
 }
 
diff --git a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp
index 5fd6102a34..8557a1eb19 100644
--- a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp
@@ -69,6 +69,7 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
     AV_FUNC_58 = 1 << 5,
     AV_FUNC_59 = 1 << 6,
     AV_FUNC_60 = 1 << 7,
+    AV_FUNC_61 = 1 << 7,
     AV_FUNC_AVUTIL_53 = AV_FUNC_53 | AV_FUNC_AVUTIL_MASK,
     AV_FUNC_AVUTIL_54 = AV_FUNC_54 | AV_FUNC_AVUTIL_MASK,
     AV_FUNC_AVUTIL_55 = AV_FUNC_55 | AV_FUNC_AVUTIL_MASK,
@@ -77,8 +78,10 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
     AV_FUNC_AVUTIL_58 = AV_FUNC_58 | AV_FUNC_AVUTIL_MASK,
     AV_FUNC_AVUTIL_59 = AV_FUNC_59 | AV_FUNC_AVUTIL_MASK,
     AV_FUNC_AVUTIL_60 = AV_FUNC_60 | AV_FUNC_AVUTIL_MASK,
+    AV_FUNC_AVUTIL_61 = AV_FUNC_61 | AV_FUNC_AVUTIL_MASK,
     AV_FUNC_AVCODEC_ALL = AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 | AV_FUNC_56 |
-                          AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60,
+                          AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 |
+                          AV_FUNC_61,
     AV_FUNC_AVUTIL_ALL = AV_FUNC_AVCODEC_ALL | AV_FUNC_AVUTIL_MASK
   };
 
@@ -107,6 +110,9 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
     case 60:
       version = AV_FUNC_60;
       break;
+    case 61:
+      version = AV_FUNC_61;
+      break;
     default:
       FFMPEGV_LOG("Unknown avcodec version: %d", macro);
       Unlink();
@@ -153,14 +159,17 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
   AV_FUNC(avcodec_decode_video2, AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 |
                                      AV_FUNC_56 | AV_FUNC_57 | AV_FUNC_58)
   AV_FUNC(avcodec_find_decoder, AV_FUNC_AVCODEC_ALL)
-  AV_FUNC(avcodec_find_decoder_by_name, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+  AV_FUNC(avcodec_find_decoder_by_name,
+          AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC(avcodec_find_encoder, AV_FUNC_AVCODEC_ALL)
-  AV_FUNC(avcodec_find_encoder_by_name, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+  AV_FUNC(avcodec_find_encoder_by_name,
+          AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC(avcodec_flush_buffers, AV_FUNC_AVCODEC_ALL)
   AV_FUNC(avcodec_open2, AV_FUNC_AVCODEC_ALL)
   AV_FUNC(avcodec_register_all, AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 |
                                     AV_FUNC_56 | AV_FUNC_57 | AV_FUNC_58)
-  AV_FUNC(av_init_packet, AV_FUNC_AVCODEC_ALL)
+  AV_FUNC(av_init_packet, (AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57 | AV_FUNC_58 |
+                           AV_FUNC_59 | AV_FUNC_60))
   AV_FUNC(av_parser_init, AV_FUNC_AVCODEC_ALL)
   AV_FUNC(av_parser_close, AV_FUNC_AVCODEC_ALL)
   AV_FUNC(av_parser_parse2, AV_FUNC_AVCODEC_ALL)
@@ -168,53 +177,68 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
   AV_FUNC(avcodec_alloc_frame, (AV_FUNC_53 | AV_FUNC_54))
   AV_FUNC(avcodec_get_frame_defaults, (AV_FUNC_53 | AV_FUNC_54))
   AV_FUNC(avcodec_free_frame, AV_FUNC_54)
-  AV_FUNC(avcodec_send_packet, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC(avcodec_receive_packet, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC(avcodec_send_frame, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC(avcodec_receive_frame, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC(avcodec_default_get_buffer2, (AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57 |
-                                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60))
-  AV_FUNC(av_packet_alloc, (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60))
-  AV_FUNC(av_packet_unref, (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60))
-  AV_FUNC(av_packet_free, (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60))
+  AV_FUNC(avcodec_send_packet,
+          AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC(avcodec_receive_packet,
+          AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC(avcodec_send_frame, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC(avcodec_receive_frame,
+          AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC(avcodec_default_get_buffer2,
+          (AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 |
+           AV_FUNC_60 | AV_FUNC_61))
+  AV_FUNC(av_packet_alloc,
+          (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61))
+  AV_FUNC(av_packet_unref,
+          (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61))
+  AV_FUNC(av_packet_free,
+          (AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61))
   AV_FUNC(avcodec_descriptor_get, AV_FUNC_AVCODEC_ALL)
   AV_FUNC(av_log_set_level, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_malloc, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_freep, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_frame_alloc,
           (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 |
+           AV_FUNC_AVUTIL_61))
   AV_FUNC(av_frame_free,
           (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 |
+           AV_FUNC_AVUTIL_61))
   AV_FUNC(av_frame_unref,
           (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 |
+           AV_FUNC_AVUTIL_61))
   AV_FUNC(av_frame_get_buffer,
           (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 |
+           AV_FUNC_AVUTIL_61))
   AV_FUNC(av_frame_make_writable,
           (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 |
+           AV_FUNC_AVUTIL_61))
   AV_FUNC(av_image_check_size, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_image_get_buffer_size, AV_FUNC_AVUTIL_ALL)
-  AV_FUNC_OPTION(av_channel_layout_default, AV_FUNC_AVUTIL_60)
-  AV_FUNC_OPTION(av_channel_layout_from_mask, AV_FUNC_AVUTIL_60)
-  AV_FUNC_OPTION(av_channel_layout_copy, AV_FUNC_AVUTIL_60)
+  AV_FUNC_OPTION(av_channel_layout_default,
+                 AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61)
+  AV_FUNC_OPTION(av_channel_layout_from_mask,
+                 AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61)
+  AV_FUNC_OPTION(av_channel_layout_copy, AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61)
   AV_FUNC_OPTION(av_buffer_get_opaque,
                  (AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 | AV_FUNC_AVUTIL_58 |
-                  AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
-  AV_FUNC(av_buffer_create,
-          (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
-           AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60))
+                  AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61))
+  AV_FUNC(
+      av_buffer_create,
+      (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
+       AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60 | AV_FUNC_61))
   AV_FUNC_OPTION(av_frame_get_colorspace,
                  AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
                      AV_FUNC_AVUTIL_58)
   AV_FUNC_OPTION(av_frame_get_color_range,
                  AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57 |
                      AV_FUNC_AVUTIL_58)
-  AV_FUNC(av_strerror,
-          AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 | AV_FUNC_AVUTIL_60)
+  AV_FUNC(av_strerror, AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 |
+                           AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61)
   AV_FUNC(av_get_sample_fmt_name, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_dict_set, AV_FUNC_AVUTIL_ALL)
   AV_FUNC(av_dict_free, AV_FUNC_AVUTIL_ALL)
@@ -224,35 +248,38 @@ FFmpegLibWrapper::LinkResult FFmpegLibWrapper::Link() {
 
 #ifdef MOZ_WIDGET_GTK
   AV_FUNC_OPTION_SILENT(avcodec_get_hw_config,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC_OPTION_SILENT(av_codec_iterate, AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC_OPTION_SILENT(av_codec_iterate,
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_codec_is_decoder,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_init,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_alloc,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwdevice_hwconfig_alloc,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwdevice_get_hwframe_constraints,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwframe_constraints_free,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC_OPTION_SILENT(av_buffer_ref,
-                        AV_FUNC_AVUTIL_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC_OPTION_SILENT(av_buffer_unref,
-                        AV_FUNC_AVUTIL_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC_OPTION_SILENT(av_buffer_ref, AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 |
+                                           AV_FUNC_AVUTIL_60 |
+                                           AV_FUNC_AVUTIL_61)
+  AV_FUNC_OPTION_SILENT(av_buffer_unref, AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 |
+                                             AV_FUNC_AVUTIL_60 |
+                                             AV_FUNC_AVUTIL_61)
   AV_FUNC_OPTION_SILENT(av_hwframe_transfer_get_formats,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_create_derived,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
   AV_FUNC_OPTION_SILENT(av_hwframe_ctx_alloc,
-                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC_OPTION_SILENT(avcodec_get_name,
-                        AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60)
-  AV_FUNC_OPTION_SILENT(av_get_pix_fmt_string, AV_FUNC_AVUTIL_58 |
-                                                   AV_FUNC_AVUTIL_59 |
-                                                   AV_FUNC_AVUTIL_60)
+                        AV_FUNC_58 | AV_FUNC_59 | AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC_OPTION_SILENT(avcodec_get_name, AV_FUNC_57 | AV_FUNC_58 | AV_FUNC_59 |
+                                              AV_FUNC_60 | AV_FUNC_61)
+  AV_FUNC_OPTION_SILENT(av_get_pix_fmt_string,
+                        AV_FUNC_AVUTIL_58 | AV_FUNC_AVUTIL_59 |
+                            AV_FUNC_AVUTIL_60 | AV_FUNC_AVUTIL_61)
 #endif
 
   AV_FUNC_OPTION(av_tx_init, AV_FUNC_AVUTIL_ALL)
diff --git a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.h b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.h
index 226b4fc8cb..d3b1be90f3 100644
--- a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.h
+++ b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.h
@@ -138,10 +138,12 @@ struct MOZ_ONLY_USED_TO_AVOID_STATIC_CONSTRUCTORS FFmpegLibWrapper {
                                      int flags);
 
   // libavcodec >= v57
-  AVPacket* (*av_packet_alloc)(void);
   void (*av_packet_unref)(AVPacket* pkt);
   void (*av_packet_free)(AVPacket** pkt);
 
+  // libavcodec >= 61
+  AVPacket* (*av_packet_alloc)();
+
   // libavcodec v58 and later only
   int (*avcodec_send_packet)(AVCodecContext* avctx, const AVPacket* avpkt);
   int (*avcodec_receive_packet)(AVCodecContext* avctx, AVPacket* avpkt);
diff --git a/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp b/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
index 2019a859e4..81eb2c0441 100644
--- a/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegRuntimeLinker.cpp
@@ -33,6 +33,7 @@ static FFmpegLibWrapper sLibAV;
 static const char* sLibs[] = {
 // clang-format off
 #if defined(XP_DARWIN)
+  "libavcodec.61.dylib",
   "libavcodec.60.dylib",
   "libavcodec.59.dylib",
   "libavcodec.58.dylib",
@@ -45,6 +46,7 @@ static const char* sLibs[] = {
   "libavcodec.so", // OpenBSD hardly controls the major/minor library version
                    // of ffmpeg and update it regulary on ABI/API changes
 #else
+  "libavcodec.so.61",
   "libavcodec.so.60",
   "libavcodec.so.59",
   "libavcodec.so.58",
@@ -174,6 +176,9 @@ already_AddRefed<PlatformDecoderModule> FFmpegRuntimeLinker::CreateDecoder() {
     case 60:
       module = FFmpegDecoderModule<60>::Create(&sLibAV);
       break;
+    case 61:
+      module = FFmpegDecoderModule<61>::Create(&sLibAV);
+      break;
     default:
       module = nullptr;
   }
@@ -209,6 +214,9 @@ already_AddRefed<PlatformEncoderModule> FFmpegRuntimeLinker::CreateEncoder() {
     case 60:
       module = FFmpegEncoderModule<60>::Create(&sLibAV);
       break;
+    case 61:
+      module = FFmpegEncoderModule<61>::Create(&sLibAV);
+      break;
     default:
       module = nullptr;
   }
diff --git a/dom/media/platforms/ffmpeg/FFmpegUtils.h b/dom/media/platforms/ffmpeg/FFmpegUtils.h
index fe588ed14c..bdbb184cf2 100644
--- a/dom/media/platforms/ffmpeg/FFmpegUtils.h
+++ b/dom/media/platforms/ffmpeg/FFmpegUtils.h
@@ -51,6 +51,36 @@ inline bool IsVideoCodec(AVCodecID aCodecID) {
   }
 }
 
+// Access the correct location for the channel count, based on ffmpeg version.
+template <typename T>
+inline int& ChannelCount(T* aObject) {
+#if LIBAVCODEC_VERSION_MAJOR <= 59
+  return aObject->channels;
+#else
+  return aObject->ch_layout.nb_channels;
+#endif
+}
+
+// Access the correct location for the duration, based on ffmpeg version.
+template <typename T>
+inline int64_t& Duration(T* aObject) {
+#if LIBAVCODEC_VERSION_MAJOR < 61
+  return aObject->pkt_duration;
+#else
+  return aObject->duration;
+#endif
+}
+
+// Access the correct location for the duration, based on ffmpeg version.
+template <typename T>
+inline const int64_t& Duration(const T* aObject) {
+#if LIBAVCODEC_VERSION_MAJOR < 61
+  return aObject->pkt_duration;
+#else
+  return aObject->duration;
+#endif
+}
+
 }  // namespace mozilla
 
 #endif  // DOM_MEDIA_PLATFORMS_FFMPEG_FFMPEGUTILS_H_
diff --git a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
index 3fe46938fd..e116ca594f 100644
--- a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp
@@ -7,6 +7,7 @@
 #include "FFmpegVideoDecoder.h"
 
 #include "FFmpegLog.h"
+#include "FFmpegUtils.h"
 #include "ImageContainer.h"
 #include "MP4Decoder.h"
 #include "MediaInfo.h"
@@ -45,6 +46,7 @@
 #  define AV_PIX_FMT_YUV444P PIX_FMT_YUV444P
 #  define AV_PIX_FMT_YUV444P10LE PIX_FMT_YUV444P10LE
 #  define AV_PIX_FMT_GBRP PIX_FMT_GBRP
+#  define AV_PIX_FMT_GBRP10LE PIX_FMT_GBRP10LE
 #  define AV_PIX_FMT_NONE PIX_FMT_NONE
 #  define AV_PIX_FMT_VAAPI_VLD PIX_FMT_VAAPI_VLD
 #endif
@@ -136,6 +138,9 @@ static AVPixelFormat ChoosePixelFormat(AVCodecContext* aCodecContext,
       case AV_PIX_FMT_GBRP:
         FFMPEGV_LOG("Requesting pixel format GBRP.");
         return AV_PIX_FMT_GBRP;
+      case AV_PIX_FMT_GBRP10LE:
+        FFMPEGV_LOG("Requesting pixel format GBRP10LE.");
+        return AV_PIX_FMT_GBRP10LE;
       default:
         break;
     }
@@ -209,7 +214,7 @@ template <>
 class VAAPIDisplayHolder<LIBAV_VER> {
  public:
   VAAPIDisplayHolder(FFmpegLibWrapper* aLib, VADisplay aDisplay, int aDRMFd)
-      : mLib(aLib), mDisplay(aDisplay), mDRMFd(aDRMFd){};
+      : mLib(aLib), mDisplay(aDisplay), mDRMFd(aDRMFd) {};
   ~VAAPIDisplayHolder() {
     mLib->vaTerminate(mDisplay);
     close(mDRMFd);
@@ -612,6 +617,7 @@ static gfx::ColorDepth GetColorDepth(const AVPixelFormat& aFormat) {
     case AV_PIX_FMT_YUV420P10LE:
     case AV_PIX_FMT_YUV422P10LE:
     case AV_PIX_FMT_YUV444P10LE:
+    case AV_PIX_FMT_GBRP10LE:
       return gfx::ColorDepth::COLOR_10;
 #if LIBAVCODEC_VERSION_MAJOR >= 57
     case AV_PIX_FMT_YUV420P12LE:
@@ -629,7 +635,7 @@ static gfx::ColorDepth GetColorDepth(const AVPixelFormat& aFormat) {
 }
 
 static bool IsYUVFormat(const AVPixelFormat& aFormat) {
-  return aFormat != AV_PIX_FMT_GBRP;
+  return aFormat != AV_PIX_FMT_GBRP && aFormat != AV_PIX_FMT_GBRP10LE;
 }
 
 static gfx::YUVColorSpace TransferAVColorSpaceToColorSpace(
@@ -871,7 +877,9 @@ int FFmpegVideoDecoder<LIBAV_VER>::GetVideoBuffer(
   aFrame->height = aCodecContext->coded_height;
   aFrame->format = aCodecContext->pix_fmt;
   aFrame->extended_data = aFrame->data;
+#  if LIBAVCODEC_VERSION_MAJOR < 61
   aFrame->reordered_opaque = aCodecContext->reordered_opaque;
+#  endif
   MOZ_ASSERT(aFrame->data[0] && aFrame->data[1] && aFrame->data[2]);
 
   // This will hold a reference to image, and the reference would be dropped
@@ -991,12 +999,7 @@ void FFmpegVideoDecoder<LIBAV_VER>::DecodeStats::UpdateDecodeTimes(
   float decodeTime = (now - mDecodeStart).ToMilliseconds();
   mDecodeStart = now;
 
-  if (aFrame->pkt_duration <= 0) {
-    FFMPEGV_LOG("Incorrect frame duration, skipping decode stats.");
-    return;
-  }
-
-  float frameDuration = aFrame->pkt_duration / 1000.0f;
+  const float frameDuration = Duration(aFrame) / 1000.0f;
 
   mDecodedFrames++;
   mAverageFrameDuration =
@@ -1044,19 +1047,27 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
     MediaRawData* aSample, uint8_t* aData, int aSize, bool* aGotFrame,
     MediaDataDecoder::DecodedData& aResults) {
   MOZ_ASSERT(mTaskQueue->IsOnCurrentThread());
-  AVPacket packet;
-  mLib->av_init_packet(&packet);
+  AVPacket* packet;
+
+#if LIBAVCODEC_VERSION_MAJOR >= 61
+  packet = mLib->av_packet_alloc();
+  auto raii = MakeScopeExit([&]() { mLib->av_packet_free(&packet); });
+#else
+  AVPacket packet_mem;
+  packet = &packet_mem;
+  mLib->av_init_packet(packet);
+#endif
 
 #if LIBAVCODEC_VERSION_MAJOR >= 58
   mDecodeStats.DecodeStart();
 #endif
 
-  packet.data = aData;
-  packet.size = aSize;
-  packet.dts = aSample->mTimecode.ToMicroseconds();
-  packet.pts = aSample->mTime.ToMicroseconds();
-  packet.flags = aSample->mKeyframe ? AV_PKT_FLAG_KEY : 0;
-  packet.pos = aSample->mOffset;
+  packet->data = aData;
+  packet->size = aSize;
+  packet->dts = aSample->mTimecode.ToMicroseconds();
+  packet->pts = aSample->mTime.ToMicroseconds();
+  packet->flags = aSample->mKeyframe ? AV_PKT_FLAG_KEY : 0;
+  packet->pos = aSample->mOffset;
 
   mTrackingId.apply([&](const auto& aId) {
     MediaInfoFlag flag = MediaInfoFlag::None;
@@ -1087,14 +1098,14 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
         break;
     }
     mPerformanceRecorder.Start(
-        packet.dts,
+        packet->dts,
         nsPrintfCString("FFmpegVideoDecoder(%d)", LIBAVCODEC_VERSION_MAJOR),
         aId, flag);
   });
 
 #if LIBAVCODEC_VERSION_MAJOR >= 58
-  packet.duration = aSample->mDuration.ToMicroseconds();
-  int res = mLib->avcodec_send_packet(mCodecContext, &packet);
+  packet->duration = aSample->mDuration.ToMicroseconds();
+  int res = mLib->avcodec_send_packet(mCodecContext, packet);
   if (res < 0) {
     // In theory, avcodec_send_packet could sent -EAGAIN should its internal
     // buffers be full. In practice this can't happen as we only feed one frame
@@ -1102,7 +1113,9 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
     char errStr[AV_ERROR_MAX_STRING_SIZE];
     mLib->av_strerror(res, errStr, AV_ERROR_MAX_STRING_SIZE);
     FFMPEG_LOG("avcodec_send_packet error: %s", errStr);
-    return MediaResult(NS_ERROR_DOM_MEDIA_DECODE_ERR,
+    return MediaResult(res == int(AVERROR_EOF)
+                           ? NS_ERROR_DOM_MEDIA_END_OF_STREAM
+                           : NS_ERROR_DOM_MEDIA_DECODE_ERR,
                        RESULT_DETAIL("avcodec_send_packet error: %s", errStr));
   }
   if (aGotFrame) {
@@ -1154,10 +1167,10 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
       }
       if (mUsingV4L2) {
         rv = CreateImageV4L2(mFrame->pkt_pos, GetFramePts(mFrame),
-                             mFrame->pkt_duration, aResults);
+                             Duration(mFrame), aResults);
       } else {
         rv = CreateImageVAAPI(mFrame->pkt_pos, GetFramePts(mFrame),
-                              mFrame->pkt_duration, aResults);
+                              Duration(mFrame), aResults);
       }
 
       // If VA-API/V4L2 playback failed, just quit. Decoder is going to be
@@ -1171,8 +1184,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
     } else
 #  endif
     {
-      rv = CreateImage(mFrame->pkt_pos, GetFramePts(mFrame),
-                       mFrame->pkt_duration, aResults);
+      rv = CreateImage(mFrame->pkt_pos, GetFramePts(mFrame), Duration(mFrame),
+                       aResults);
     }
     if (NS_FAILED(rv)) {
       return rv;
@@ -1202,6 +1215,7 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
 #  endif
             return Some(DecodeStage::YUV444P);
           case AV_PIX_FMT_GBRP:
+          case AV_PIX_FMT_GBRP10LE:
             return Some(DecodeStage::GBRP);
           case AV_PIX_FMT_VAAPI_VLD:
             return Some(DecodeStage::VAAPI_SURFACE);
@@ -1213,6 +1227,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
       aStage.SetColorDepth(GetColorDepth(mCodecContext->pix_fmt));
       aStage.SetYUVColorSpace(GetFrameColorSpace());
       aStage.SetColorRange(GetFrameColorRange());
+      aStage.SetStartTimeAndEndTime(aSample->mTime.ToMicroseconds(),
+                                    aSample->GetEndTime().ToMicroseconds());
     });
     if (aGotFrame) {
       *aGotFrame = true;
@@ -1237,14 +1253,14 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
 
   int decoded;
   int bytesConsumed =
-      mLib->avcodec_decode_video2(mCodecContext, mFrame, &decoded, &packet);
+      mLib->avcodec_decode_video2(mCodecContext, mFrame, &decoded, packet);
 
   FFMPEG_LOG(
       "DoDecodeFrame:decode_video: rv=%d decoded=%d "
       "(Input: pts(%" PRId64 ") dts(%" PRId64 ") Output: pts(%" PRId64
       ") "
       "opaque(%" PRId64 ") pts(%" PRId64 ") pkt_dts(%" PRId64 "))",
-      bytesConsumed, decoded, packet.pts, packet.dts, mFrame->pts,
+      bytesConsumed, decoded, packet->pts, packet->dts, mFrame->pts,
       mFrame->reordered_opaque, mFrame->pts, mFrame->pkt_dts);
 
   if (bytesConsumed < 0) {
@@ -1306,6 +1322,7 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
 #  endif
             return Some(DecodeStage::YUV444P);
           case AV_PIX_FMT_GBRP:
+          case AV_PIX_FMT_GBRP10LE:
             return Some(DecodeStage::GBRP);
           default:
             return Nothing();
@@ -1315,6 +1332,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::DoDecode(
       aStage.SetColorDepth(GetColorDepth(mCodecContext->pix_fmt));
       aStage.SetYUVColorSpace(GetFrameColorSpace());
       aStage.SetColorRange(GetFrameColorRange());
+      aStage.SetStartTimeAndEndTime(aSample->mTime.ToMicroseconds(),
+                                    aSample->GetEndTime().ToMicroseconds());
     });
   });
 
@@ -1372,8 +1391,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::CreateImage(
     int64_t aOffset, int64_t aPts, int64_t aDuration,
     MediaDataDecoder::DecodedData& aResults) const {
   FFMPEG_LOG("Got one frame output with pts=%" PRId64 " dts=%" PRId64
-             " duration=%" PRId64 " opaque=%" PRId64,
-             aPts, mFrame->pkt_dts, aDuration, mCodecContext->reordered_opaque);
+             " duration=%" PRId64,
+             aPts, mFrame->pkt_dts, aDuration);
 
   VideoData::YCbCrBuffer b;
   b.mPlanes[0].mData = mFrame->data[0];
@@ -1392,14 +1411,16 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::CreateImage(
   b.mPlanes[0].mHeight = mFrame->height;
   if (mCodecContext->pix_fmt == AV_PIX_FMT_YUV444P ||
       mCodecContext->pix_fmt == AV_PIX_FMT_YUV444P10LE ||
-      mCodecContext->pix_fmt == AV_PIX_FMT_GBRP
+      mCodecContext->pix_fmt == AV_PIX_FMT_GBRP ||
+      mCodecContext->pix_fmt == AV_PIX_FMT_GBRP10LE
 #if LIBAVCODEC_VERSION_MAJOR >= 57
       || mCodecContext->pix_fmt == AV_PIX_FMT_YUV444P12LE
 #endif
   ) {
     b.mPlanes[1].mWidth = b.mPlanes[2].mWidth = mFrame->width;
     b.mPlanes[1].mHeight = b.mPlanes[2].mHeight = mFrame->height;
-    if (mCodecContext->pix_fmt == AV_PIX_FMT_YUV444P10LE) {
+    if (mCodecContext->pix_fmt == AV_PIX_FMT_YUV444P10LE ||
+        mCodecContext->pix_fmt == AV_PIX_FMT_GBRP10LE) {
       b.mColorDepth = gfx::ColorDepth::COLOR_10;
     }
 #if LIBAVCODEC_VERSION_MAJOR >= 57
@@ -1501,8 +1522,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::CreateImageVAAPI(
     int64_t aOffset, int64_t aPts, int64_t aDuration,
     MediaDataDecoder::DecodedData& aResults) {
   FFMPEG_LOG("VA-API Got one frame output with pts=%" PRId64 " dts=%" PRId64
-             " duration=%" PRId64 " opaque=%" PRId64,
-             aPts, mFrame->pkt_dts, aDuration, mCodecContext->reordered_opaque);
+             " duration=%" PRId64,
+             aPts, mFrame->pkt_dts, aDuration);
 
   VADRMPRIMESurfaceDescriptor vaDesc;
   if (!GetVAAPISurfaceDescriptor(&vaDesc)) {
@@ -1547,8 +1568,8 @@ MediaResult FFmpegVideoDecoder<LIBAV_VER>::CreateImageV4L2(
     int64_t aOffset, int64_t aPts, int64_t aDuration,
     MediaDataDecoder::DecodedData& aResults) {
   FFMPEG_LOG("V4L2 Got one frame output with pts=%" PRId64 " dts=%" PRId64
-             " duration=%" PRId64 " opaque=%" PRId64,
-             aPts, mFrame->pkt_dts, aDuration, mCodecContext->reordered_opaque);
+             " duration=%" PRId64,
+             aPts, mFrame->pkt_dts, aDuration);
 
   AVDRMFrameDescriptor* desc = (AVDRMFrameDescriptor*)mFrame->data[0];
   if (!desc) {
@@ -1673,8 +1694,7 @@ static const struct {
   VAProfile va_profile;
   char name[100];
 } vaapi_profile_map[] = {
-#  define MAP(c, v, n) \
-    { AV_CODEC_ID_##c, VAProfile##v, n }
+#  define MAP(c, v, n) {AV_CODEC_ID_##c, VAProfile##v, n}
     MAP(H264, H264ConstrainedBaseline, "H264ConstrainedBaseline"),
     MAP(H264, H264Main, "H264Main"),
     MAP(H264, H264High, "H264High"),
diff --git a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.h b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.h
index fda38069ba..2d6771a7b1 100644
--- a/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.h
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoDecoder.h
@@ -43,7 +43,7 @@ class FFmpegVideoDecoder<LIBAV_VER>
   typedef mozilla::layers::Image Image;
   typedef mozilla::layers::ImageContainer ImageContainer;
   typedef mozilla::layers::KnowsCompositor KnowsCompositor;
-  typedef SimpleMap<int64_t> DurationMap;
+  typedef SimpleMap<int64_t, int64_t, ThreadSafePolicy> DurationMap;
 
  public:
   FFmpegVideoDecoder(FFmpegLibWrapper* aLib, const VideoInfo& aConfig,
@@ -205,6 +205,7 @@ class FFmpegVideoDecoder<LIBAV_VER>
   const bool mLowLatency;
   const Maybe<TrackingId> mTrackingId;
   PerformanceRecorderMulti<DecodeStage> mPerformanceRecorder;
+  PerformanceRecorderMulti<DecodeStage> mPerformanceRecorder2;
 
   // True if we're allocating shmem for ffmpeg decode buffer.
   Maybe<Atomic<bool>> mIsUsingShmemBufferForDecode;
diff --git a/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.cpp b/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.cpp
index 9d1dbcf80f..83b0f98c5b 100644
--- a/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.cpp
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.cpp
@@ -15,7 +15,7 @@
 #include "libavutil/pixfmt.h"
 #include "mozilla/dom/ImageUtils.h"
 #include "nsPrintfCString.h"
-#include "ImageToI420.h"
+#include "ImageConversion.h"
 #include "libyuv.h"
 #include "FFmpegRuntimeLinker.h"
 
@@ -510,7 +510,7 @@ Result<MediaDataEncoder::EncodedData, nsresult> FFmpegVideoEncoder<
   // Save duration in the time_base unit.
   mDurationMap.Insert(mFrame->pts, aSample->mDuration.ToMicroseconds());
 #  endif
-  mFrame->pkt_duration = aSample->mDuration.ToMicroseconds();
+  Duration(mFrame) = aSample->mDuration.ToMicroseconds();
 
   // Now send the AVFrame to ffmpeg for encoding, same code for audio and video.
   return FFmpegDataEncoder<LIBAV_VER>::EncodeWithModernAPIs();
diff --git a/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.h b/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.h
index 0ee5f52aec..2c4b20c441 100644
--- a/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.h
+++ b/dom/media/platforms/ffmpeg/FFmpegVideoEncoder.h
@@ -22,7 +22,7 @@ class FFmpegVideoEncoder : public MediaDataEncoder {};
 
 template <>
 class FFmpegVideoEncoder<LIBAV_VER> : public FFmpegDataEncoder<LIBAV_VER> {
-  using DurationMap = SimpleMap<int64_t>;
+  using DurationMap = SimpleMap<int64_t, int64_t, ThreadSafePolicy>;
 
  public:
   FFmpegVideoEncoder(const FFmpegLibWrapper* aLib, AVCodecID aCodecID,
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/COPYING.LGPLv2.1 b/dom/media/platforms/ffmpeg/ffmpeg61/include/COPYING.LGPLv2.1
new file mode 100644
index 0000000000..00b4fedfe7
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/COPYING.LGPLv2.1
@@ -0,0 +1,504 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
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+
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diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avcodec.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avcodec.h
new file mode 100644
index 0000000000..5216bff1f8
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avcodec.h
@@ -0,0 +1,3121 @@
+/*
+ * copyright (c) 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AVCODEC_H
+#define AVCODEC_AVCODEC_H
+
+/**
+ * @file
+ * @ingroup libavc
+ * Libavcodec external API header
+ */
+
+#include "libavutil/samplefmt.h"
+#include "libavutil/attributes.h"
+#include "libavutil/avutil.h"
+#include "libavutil/buffer.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/dict.h"
+#include "libavutil/frame.h"
+#include "libavutil/log.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/rational.h"
+
+#include "codec.h"
+#include "codec_id.h"
+#include "defs.h"
+#include "packet.h"
+#include "version_major.h"
+#ifndef HAVE_AV_CONFIG_H
+/* When included as part of the ffmpeg build, only include the major version
+ * to avoid unnecessary rebuilds. When included externally, keep including
+ * the full version information. */
+#  include "version.h"
+
+#  include "codec_desc.h"
+#  include "codec_par.h"
+#endif
+
+struct AVCodecParameters;
+
+/**
+ * @defgroup libavc libavcodec
+ * Encoding/Decoding Library
+ *
+ * @{
+ *
+ * @defgroup lavc_decoding Decoding
+ * @{
+ * @}
+ *
+ * @defgroup lavc_encoding Encoding
+ * @{
+ * @}
+ *
+ * @defgroup lavc_codec Codecs
+ * @{
+ * @defgroup lavc_codec_native Native Codecs
+ * @{
+ * @}
+ * @defgroup lavc_codec_wrappers External library wrappers
+ * @{
+ * @}
+ * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
+ * @{
+ * @}
+ * @}
+ * @defgroup lavc_internal Internal
+ * @{
+ * @}
+ * @}
+ */
+
+/**
+ * @ingroup libavc
+ * @defgroup lavc_encdec send/receive encoding and decoding API overview
+ * @{
+ *
+ * The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/
+ * avcodec_receive_packet() functions provide an encode/decode API, which
+ * decouples input and output.
+ *
+ * The API is very similar for encoding/decoding and audio/video, and works as
+ * follows:
+ * - Set up and open the AVCodecContext as usual.
+ * - Send valid input:
+ *   - For decoding, call avcodec_send_packet() to give the decoder raw
+ *     compressed data in an AVPacket.
+ *   - For encoding, call avcodec_send_frame() to give the encoder an AVFrame
+ *     containing uncompressed audio or video.
+ *
+ *   In both cases, it is recommended that AVPackets and AVFrames are
+ *   refcounted, or libavcodec might have to copy the input data. (libavformat
+ *   always returns refcounted AVPackets, and av_frame_get_buffer() allocates
+ *   refcounted AVFrames.)
+ * - Receive output in a loop. Periodically call one of the avcodec_receive_*()
+ *   functions and process their output:
+ *   - For decoding, call avcodec_receive_frame(). On success, it will return
+ *     an AVFrame containing uncompressed audio or video data.
+ *   - For encoding, call avcodec_receive_packet(). On success, it will return
+ *     an AVPacket with a compressed frame.
+ *
+ *   Repeat this call until it returns AVERROR(EAGAIN) or an error. The
+ *   AVERROR(EAGAIN) return value means that new input data is required to
+ *   return new output. In this case, continue with sending input. For each
+ *   input frame/packet, the codec will typically return 1 output frame/packet,
+ *   but it can also be 0 or more than 1.
+ *
+ * At the beginning of decoding or encoding, the codec might accept multiple
+ * input frames/packets without returning a frame, until its internal buffers
+ * are filled. This situation is handled transparently if you follow the steps
+ * outlined above.
+ *
+ * In theory, sending input can result in EAGAIN - this should happen only if
+ * not all output was received. You can use this to structure alternative decode
+ * or encode loops other than the one suggested above. For example, you could
+ * try sending new input on each iteration, and try to receive output if that
+ * returns EAGAIN.
+ *
+ * End of stream situations. These require "flushing" (aka draining) the codec,
+ * as the codec might buffer multiple frames or packets internally for
+ * performance or out of necessity (consider B-frames).
+ * This is handled as follows:
+ * - Instead of valid input, send NULL to the avcodec_send_packet() (decoding)
+ *   or avcodec_send_frame() (encoding) functions. This will enter draining
+ *   mode.
+ * - Call avcodec_receive_frame() (decoding) or avcodec_receive_packet()
+ *   (encoding) in a loop until AVERROR_EOF is returned. The functions will
+ *   not return AVERROR(EAGAIN), unless you forgot to enter draining mode.
+ * - Before decoding can be resumed again, the codec has to be reset with
+ *   avcodec_flush_buffers().
+ *
+ * Using the API as outlined above is highly recommended. But it is also
+ * possible to call functions outside of this rigid schema. For example, you can
+ * call avcodec_send_packet() repeatedly without calling
+ * avcodec_receive_frame(). In this case, avcodec_send_packet() will succeed
+ * until the codec's internal buffer has been filled up (which is typically of
+ * size 1 per output frame, after initial input), and then reject input with
+ * AVERROR(EAGAIN). Once it starts rejecting input, you have no choice but to
+ * read at least some output.
+ *
+ * Not all codecs will follow a rigid and predictable dataflow; the only
+ * guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on
+ * one end implies that a receive/send call on the other end will succeed, or
+ * at least will not fail with AVERROR(EAGAIN). In general, no codec will
+ * permit unlimited buffering of input or output.
+ *
+ * A codec is not allowed to return AVERROR(EAGAIN) for both sending and
+ * receiving. This would be an invalid state, which could put the codec user
+ * into an endless loop. The API has no concept of time either: it cannot happen
+ * that trying to do avcodec_send_packet() results in AVERROR(EAGAIN), but a
+ * repeated call 1 second later accepts the packet (with no other receive/flush
+ * API calls involved). The API is a strict state machine, and the passage of
+ * time is not supposed to influence it. Some timing-dependent behavior might
+ * still be deemed acceptable in certain cases. But it must never result in both
+ * send/receive returning EAGAIN at the same time at any point. It must also
+ * absolutely be avoided that the current state is "unstable" and can
+ * "flip-flop" between the send/receive APIs allowing progress. For example,
+ * it's not allowed that the codec randomly decides that it actually wants to
+ * consume a packet now instead of returning a frame, after it just returned
+ * AVERROR(EAGAIN) on an avcodec_send_packet() call.
+ * @}
+ */
+
+/**
+ * @defgroup lavc_core Core functions/structures.
+ * @ingroup libavc
+ *
+ * Basic definitions, functions for querying libavcodec capabilities,
+ * allocating core structures, etc.
+ * @{
+ */
+
+#if FF_API_BUFFER_MIN_SIZE
+/**
+ * @ingroup lavc_encoding
+ * minimum encoding buffer size
+ * Used to avoid some checks during header writing.
+ * @deprecated Unused: avcodec_receive_packet() does not work
+ *             with preallocated packet buffers.
+ */
+#  define AV_INPUT_BUFFER_MIN_SIZE 16384
+#endif
+
+/**
+ * @ingroup lavc_encoding
+ */
+typedef struct RcOverride {
+  int start_frame;
+  int end_frame;
+  int qscale;  // If this is 0 then quality_factor will be used instead.
+  float quality_factor;
+} RcOverride;
+
+/* encoding support
+   These flags can be passed in AVCodecContext.flags before initialization.
+   Note: Not everything is supported yet.
+*/
+
+/**
+ * Allow decoders to produce frames with data planes that are not aligned
+ * to CPU requirements (e.g. due to cropping).
+ */
+#define AV_CODEC_FLAG_UNALIGNED (1 << 0)
+/**
+ * Use fixed qscale.
+ */
+#define AV_CODEC_FLAG_QSCALE (1 << 1)
+/**
+ * 4 MV per MB allowed / advanced prediction for H.263.
+ */
+#define AV_CODEC_FLAG_4MV (1 << 2)
+/**
+ * Output even those frames that might be corrupted.
+ */
+#define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3)
+/**
+ * Use qpel MC.
+ */
+#define AV_CODEC_FLAG_QPEL (1 << 4)
+#if FF_API_DROPCHANGED
+/**
+ * Don't output frames whose parameters differ from first
+ * decoded frame in stream.
+ *
+ * @deprecated callers should implement this functionality in their own code
+ */
+#  define AV_CODEC_FLAG_DROPCHANGED (1 << 5)
+#endif
+/**
+ * Request the encoder to output reconstructed frames, i.e.\ frames that would
+ * be produced by decoding the encoded bistream. These frames may be retrieved
+ * by calling avcodec_receive_frame() immediately after a successful call to
+ * avcodec_receive_packet().
+ *
+ * Should only be used with encoders flagged with the
+ * @ref AV_CODEC_CAP_ENCODER_RECON_FRAME capability.
+ *
+ * @note
+ * Each reconstructed frame returned by the encoder corresponds to the last
+ * encoded packet, i.e. the frames are returned in coded order rather than
+ * presentation order.
+ *
+ * @note
+ * Frame parameters (like pixel format or dimensions) do not have to match the
+ * AVCodecContext values. Make sure to use the values from the returned frame.
+ */
+#define AV_CODEC_FLAG_RECON_FRAME (1 << 6)
+/**
+ * @par decoding
+ * Request the decoder to propagate each packet's AVPacket.opaque and
+ * AVPacket.opaque_ref to its corresponding output AVFrame.
+ *
+ * @par encoding:
+ * Request the encoder to propagate each frame's AVFrame.opaque and
+ * AVFrame.opaque_ref values to its corresponding output AVPacket.
+ *
+ * @par
+ * May only be set on encoders that have the
+ * @ref AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability flag.
+ *
+ * @note
+ * While in typical cases one input frame produces exactly one output packet
+ * (perhaps after a delay), in general the mapping of frames to packets is
+ * M-to-N, so
+ * - Any number of input frames may be associated with any given output packet.
+ *   This includes zero - e.g. some encoders may output packets that carry only
+ *   metadata about the whole stream.
+ * - A given input frame may be associated with any number of output packets.
+ *   Again this includes zero - e.g. some encoders may drop frames under certain
+ *   conditions.
+ * .
+ * This implies that when using this flag, the caller must NOT assume that
+ * - a given input frame's opaques will necessarily appear on some output
+ * packet;
+ * - every output packet will have some non-NULL opaque value.
+ * .
+ * When an output packet contains multiple frames, the opaque values will be
+ * taken from the first of those.
+ *
+ * @note
+ * The converse holds for decoders, with frames and packets switched.
+ */
+#define AV_CODEC_FLAG_COPY_OPAQUE (1 << 7)
+/**
+ * Signal to the encoder that the values of AVFrame.duration are valid and
+ * should be used (typically for transferring them to output packets).
+ *
+ * If this flag is not set, frame durations are ignored.
+ */
+#define AV_CODEC_FLAG_FRAME_DURATION (1 << 8)
+/**
+ * Use internal 2pass ratecontrol in first pass mode.
+ */
+#define AV_CODEC_FLAG_PASS1 (1 << 9)
+/**
+ * Use internal 2pass ratecontrol in second pass mode.
+ */
+#define AV_CODEC_FLAG_PASS2 (1 << 10)
+/**
+ * loop filter.
+ */
+#define AV_CODEC_FLAG_LOOP_FILTER (1 << 11)
+/**
+ * Only decode/encode grayscale.
+ */
+#define AV_CODEC_FLAG_GRAY (1 << 13)
+/**
+ * error[?] variables will be set during encoding.
+ */
+#define AV_CODEC_FLAG_PSNR (1 << 15)
+/**
+ * Use interlaced DCT.
+ */
+#define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18)
+/**
+ * Force low delay.
+ */
+#define AV_CODEC_FLAG_LOW_DELAY (1 << 19)
+/**
+ * Place global headers in extradata instead of every keyframe.
+ */
+#define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22)
+/**
+ * Use only bitexact stuff (except (I)DCT).
+ */
+#define AV_CODEC_FLAG_BITEXACT (1 << 23)
+/* Fx : Flag for H.263+ extra options */
+/**
+ * H.263 advanced intra coding / MPEG-4 AC prediction
+ */
+#define AV_CODEC_FLAG_AC_PRED (1 << 24)
+/**
+ * interlaced motion estimation
+ */
+#define AV_CODEC_FLAG_INTERLACED_ME (1 << 29)
+#define AV_CODEC_FLAG_CLOSED_GOP (1U << 31)
+
+/**
+ * Allow non spec compliant speedup tricks.
+ */
+#define AV_CODEC_FLAG2_FAST (1 << 0)
+/**
+ * Skip bitstream encoding.
+ */
+#define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2)
+/**
+ * Place global headers at every keyframe instead of in extradata.
+ */
+#define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3)
+
+/**
+ * Input bitstream might be truncated at a packet boundaries
+ * instead of only at frame boundaries.
+ */
+#define AV_CODEC_FLAG2_CHUNKS (1 << 15)
+/**
+ * Discard cropping information from SPS.
+ */
+#define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16)
+
+/**
+ * Show all frames before the first keyframe
+ */
+#define AV_CODEC_FLAG2_SHOW_ALL (1 << 22)
+/**
+ * Export motion vectors through frame side data
+ */
+#define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28)
+/**
+ * Do not skip samples and export skip information as frame side data
+ */
+#define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29)
+/**
+ * Do not reset ASS ReadOrder field on flush (subtitles decoding)
+ */
+#define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30)
+/**
+ * Generate/parse ICC profiles on encode/decode, as appropriate for the type of
+ * file. No effect on codecs which cannot contain embedded ICC profiles, or
+ * when compiled without support for lcms2.
+ */
+#define AV_CODEC_FLAG2_ICC_PROFILES (1U << 31)
+
+/* Exported side data.
+   These flags can be passed in AVCodecContext.export_side_data before
+   initialization.
+*/
+/**
+ * Export motion vectors through frame side data
+ */
+#define AV_CODEC_EXPORT_DATA_MVS (1 << 0)
+/**
+ * Export encoder Producer Reference Time through packet side data
+ */
+#define AV_CODEC_EXPORT_DATA_PRFT (1 << 1)
+/**
+ * Decoding only.
+ * Export the AVVideoEncParams structure through frame side data.
+ */
+#define AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS (1 << 2)
+/**
+ * Decoding only.
+ * Do not apply film grain, export it instead.
+ */
+#define AV_CODEC_EXPORT_DATA_FILM_GRAIN (1 << 3)
+
+/**
+ * The decoder will keep a reference to the frame and may reuse it later.
+ */
+#define AV_GET_BUFFER_FLAG_REF (1 << 0)
+
+/**
+ * The encoder will keep a reference to the packet and may reuse it later.
+ */
+#define AV_GET_ENCODE_BUFFER_FLAG_REF (1 << 0)
+
+/**
+ * main external API structure.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ * You can use AVOptions (av_opt* / av_set/get*()) to access these fields from
+ * user applications. The name string for AVOptions options matches the
+ * associated command line parameter name and can be found in
+ * libavcodec/options_table.h The AVOption/command line parameter names differ
+ * in some cases from the C structure field names for historic reasons or
+ * brevity. sizeof(AVCodecContext) must not be used outside libav*.
+ */
+typedef struct AVCodecContext {
+  /**
+   * information on struct for av_log
+   * - set by avcodec_alloc_context3
+   */
+  const AVClass* av_class;
+  int log_level_offset;
+
+  enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
+  const struct AVCodec* codec;
+  enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
+
+  /**
+   * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
+   * This is used to work around some encoder bugs.
+   * A demuxer should set this to what is stored in the field used to identify
+   * the codec. If there are multiple such fields in a container then the
+   * demuxer should choose the one which maximizes the information about the
+   * used codec. If the codec tag field in a container is larger than 32 bits
+   * then the demuxer should remap the longer ID to 32 bits with a table or
+   * other structure. Alternatively a new extra_codec_tag + size could be added
+   * but for this a clear advantage must be demonstrated first.
+   * - encoding: Set by user, if not then the default based on codec_id will be
+   * used.
+   * - decoding: Set by user, will be converted to uppercase by libavcodec
+   * during init.
+   */
+  unsigned int codec_tag;
+
+  void* priv_data;
+
+  /**
+   * Private context used for internal data.
+   *
+   * Unlike priv_data, this is not codec-specific. It is used in general
+   * libavcodec functions.
+   */
+  struct AVCodecInternal* internal;
+
+  /**
+   * Private data of the user, can be used to carry app specific stuff.
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  void* opaque;
+
+  /**
+   * the average bitrate
+   * - encoding: Set by user; unused for constant quantizer encoding.
+   * - decoding: Set by user, may be overwritten by libavcodec
+   *             if this info is available in the stream
+   */
+  int64_t bit_rate;
+
+  /**
+   * AV_CODEC_FLAG_*.
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int flags;
+
+  /**
+   * AV_CODEC_FLAG2_*
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int flags2;
+
+  /**
+   * some codecs need / can use extradata like Huffman tables.
+   * MJPEG: Huffman tables
+   * rv10: additional flags
+   * MPEG-4: global headers (they can be in the bitstream or here)
+   * The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger
+   * than extradata_size to avoid problems if it is read with the bitstream
+   * reader. The bytewise contents of extradata must not depend on the
+   * architecture or CPU endianness. Must be allocated with the av_malloc()
+   * family of functions.
+   * - encoding: Set/allocated/freed by libavcodec.
+   * - decoding: Set/allocated/freed by user.
+   */
+  uint8_t* extradata;
+  int extradata_size;
+
+  /**
+   * This is the fundamental unit of time (in seconds) in terms
+   * of which frame timestamps are represented. For fixed-fps content,
+   * timebase should be 1/framerate and timestamp increments should be
+   * identically 1.
+   * This often, but not always is the inverse of the frame rate or field rate
+   * for video. 1/time_base is not the average frame rate if the frame rate is
+   * not constant.
+   *
+   * Like containers, elementary streams also can store timestamps, 1/time_base
+   * is the unit in which these timestamps are specified.
+   * As example of such codec time base see ISO/IEC 14496-2:2001(E)
+   * vop_time_increment_resolution and fixed_vop_rate
+   * (fixed_vop_rate == 0 implies that it is different from the framerate)
+   *
+   * - encoding: MUST be set by user.
+   * - decoding: unused.
+   */
+  AVRational time_base;
+
+  /**
+   * Timebase in which pkt_dts/pts and AVPacket.dts/pts are expressed.
+   * - encoding: unused.
+   * - decoding: set by user.
+   */
+  AVRational pkt_timebase;
+
+  /**
+   * - decoding: For codecs that store a framerate value in the compressed
+   *             bitstream, the decoder may export it here. { 0, 1} when
+   *             unknown.
+   * - encoding: May be used to signal the framerate of CFR content to an
+   *             encoder.
+   */
+  AVRational framerate;
+
+#if FF_API_TICKS_PER_FRAME
+  /**
+   * For some codecs, the time base is closer to the field rate than the frame
+   * rate. Most notably, H.264 and MPEG-2 specify time_base as half of frame
+   * duration if no telecine is used ...
+   *
+   * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it
+   * to 2.
+   *
+   * @deprecated
+   * - decoding: Use AVCodecDescriptor.props & AV_CODEC_PROP_FIELDS
+   * - encoding: Set AVCodecContext.framerate instead
+   *
+   */
+  attribute_deprecated int ticks_per_frame;
+#endif
+
+  /**
+   * Codec delay.
+   *
+   * Encoding: Number of frames delay there will be from the encoder input to
+   *           the decoder output. (we assume the decoder matches the spec)
+   * Decoding: Number of frames delay in addition to what a standard decoder
+   *           as specified in the spec would produce.
+   *
+   * Video:
+   *   Number of frames the decoded output will be delayed relative to the
+   *   encoded input.
+   *
+   * Audio:
+   *   For encoding, this field is unused (see initial_padding).
+   *
+   *   For decoding, this is the number of samples the decoder needs to
+   *   output before the decoder's output is valid. When seeking, you should
+   *   start decoding this many samples prior to your desired seek point.
+   *
+   * - encoding: Set by libavcodec.
+   * - decoding: Set by libavcodec.
+   */
+  int delay;
+
+  /* video only */
+  /**
+   * picture width / height.
+   *
+   * @note Those fields may not match the values of the last
+   * AVFrame output by avcodec_receive_frame() due frame
+   * reordering.
+   *
+   * - encoding: MUST be set by user.
+   * - decoding: May be set by the user before opening the decoder if known e.g.
+   *             from the container. Some decoders will require the dimensions
+   *             to be set by the caller. During decoding, the decoder may
+   *             overwrite those values as required while parsing the data.
+   */
+  int width, height;
+
+  /**
+   * Bitstream width / height, may be different from width/height e.g. when
+   * the decoded frame is cropped before being output or lowres is enabled.
+   *
+   * @note Those field may not match the value of the last
+   * AVFrame output by avcodec_receive_frame() due frame
+   * reordering.
+   *
+   * - encoding: unused
+   * - decoding: May be set by the user before opening the decoder if known
+   *             e.g. from the container. During decoding, the decoder may
+   *             overwrite those values as required while parsing the data.
+   */
+  int coded_width, coded_height;
+
+  /**
+   * sample aspect ratio (0 if unknown)
+   * That is the width of a pixel divided by the height of the pixel.
+   * Numerator and denominator must be relatively prime and smaller than 256 for
+   * some video standards.
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  AVRational sample_aspect_ratio;
+
+  /**
+   * Pixel format, see AV_PIX_FMT_xxx.
+   * May be set by the demuxer if known from headers.
+   * May be overridden by the decoder if it knows better.
+   *
+   * @note This field may not match the value of the last
+   * AVFrame output by avcodec_receive_frame() due frame
+   * reordering.
+   *
+   * - encoding: Set by user.
+   * - decoding: Set by user if known, overridden by libavcodec while
+   *             parsing the data.
+   */
+  enum AVPixelFormat pix_fmt;
+
+  /**
+   * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
+   * - encoding: unused.
+   * - decoding: Set by libavcodec before calling get_format()
+   */
+  enum AVPixelFormat sw_pix_fmt;
+
+  /**
+   * Chromaticity coordinates of the source primaries.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVColorPrimaries color_primaries;
+
+  /**
+   * Color Transfer Characteristic.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVColorTransferCharacteristic color_trc;
+
+  /**
+   * YUV colorspace type.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVColorSpace colorspace;
+
+  /**
+   * MPEG vs JPEG YUV range.
+   * - encoding: Set by user to override the default output color range value,
+   *   If not specified, libavcodec sets the color range depending on the
+   *   output format.
+   * - decoding: Set by libavcodec, can be set by the user to propagate the
+   *   color range to components reading from the decoder context.
+   */
+  enum AVColorRange color_range;
+
+  /**
+   * This defines the location of chroma samples.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVChromaLocation chroma_sample_location;
+
+  /** Field order
+   * - encoding: set by libavcodec
+   * - decoding: Set by user.
+   */
+  enum AVFieldOrder field_order;
+
+  /**
+   * number of reference frames
+   * - encoding: Set by user.
+   * - decoding: Set by lavc.
+   */
+  int refs;
+
+  /**
+   * Size of the frame reordering buffer in the decoder.
+   * For MPEG-2 it is 1 IPB or 0 low delay IP.
+   * - encoding: Set by libavcodec.
+   * - decoding: Set by libavcodec.
+   */
+  int has_b_frames;
+
+  /**
+   * slice flags
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  int slice_flags;
+#define SLICE_FLAG_CODED_ORDER \
+  0x0001  ///< draw_horiz_band() is called in coded order instead of display
+#define SLICE_FLAG_ALLOW_FIELD \
+  0x0002  ///< allow draw_horiz_band() with field slices (MPEG-2 field pics)
+#define SLICE_FLAG_ALLOW_PLANE \
+  0x0004  ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
+
+  /**
+   * If non NULL, 'draw_horiz_band' is called by the libavcodec
+   * decoder to draw a horizontal band. It improves cache usage. Not
+   * all codecs can do that. You must check the codec capabilities
+   * beforehand.
+   * When multithreading is used, it may be called from multiple threads
+   * at the same time; threads might draw different parts of the same AVFrame,
+   * or multiple AVFrames, and there is no guarantee that slices will be drawn
+   * in order.
+   * The function is also used by hardware acceleration APIs.
+   * It is called at least once during frame decoding to pass
+   * the data needed for hardware render.
+   * In that mode instead of pixel data, AVFrame points to
+   * a structure specific to the acceleration API. The application
+   * reads the structure and can change some fields to indicate progress
+   * or mark state.
+   * - encoding: unused
+   * - decoding: Set by user.
+   * @param height the height of the slice
+   * @param y the y position of the slice
+   * @param type 1->top field, 2->bottom field, 3->frame
+   * @param offset offset into the AVFrame.data from which the slice should be
+   * read
+   */
+  void (*draw_horiz_band)(struct AVCodecContext* s, const AVFrame* src,
+                          int offset[AV_NUM_DATA_POINTERS], int y, int type,
+                          int height);
+
+  /**
+   * Callback to negotiate the pixel format. Decoding only, may be set by the
+   * caller before avcodec_open2().
+   *
+   * Called by some decoders to select the pixel format that will be used for
+   * the output frames. This is mainly used to set up hardware acceleration,
+   * then the provided format list contains the corresponding hwaccel pixel
+   * formats alongside the "software" one. The software pixel format may also
+   * be retrieved from \ref sw_pix_fmt.
+   *
+   * This callback will be called when the coded frame properties (such as
+   * resolution, pixel format, etc.) change and more than one output format is
+   * supported for those new properties. If a hardware pixel format is chosen
+   * and initialization for it fails, the callback may be called again
+   * immediately.
+   *
+   * This callback may be called from different threads if the decoder is
+   * multi-threaded, but not from more than one thread simultaneously.
+   *
+   * @param fmt list of formats which may be used in the current
+   *            configuration, terminated by AV_PIX_FMT_NONE.
+   * @warning Behavior is undefined if the callback returns a value other
+   *          than one of the formats in fmt or AV_PIX_FMT_NONE.
+   * @return the chosen format or AV_PIX_FMT_NONE
+   */
+  enum AVPixelFormat (*get_format)(struct AVCodecContext* s,
+                                   const enum AVPixelFormat* fmt);
+
+  /**
+   * maximum number of B-frames between non-B-frames
+   * Note: The output will be delayed by max_b_frames+1 relative to the input.
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int max_b_frames;
+
+  /**
+   * qscale factor between IP and B-frames
+   * If > 0 then the last P-frame quantizer will be used (q=
+   * lastp_q*factor+offset). If < 0 then normal ratecontrol will be done (q=
+   * -normal_q*factor+offset).
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float b_quant_factor;
+
+  /**
+   * qscale offset between IP and B-frames
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float b_quant_offset;
+
+  /**
+   * qscale factor between P- and I-frames
+   * If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor +
+   * offset). If < 0 then normal ratecontrol will be done (q=
+   * -normal_q*factor+offset).
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float i_quant_factor;
+
+  /**
+   * qscale offset between P and I-frames
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float i_quant_offset;
+
+  /**
+   * luminance masking (0-> disabled)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float lumi_masking;
+
+  /**
+   * temporary complexity masking (0-> disabled)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float temporal_cplx_masking;
+
+  /**
+   * spatial complexity masking (0-> disabled)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float spatial_cplx_masking;
+
+  /**
+   * p block masking (0-> disabled)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float p_masking;
+
+  /**
+   * darkness masking (0-> disabled)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  float dark_masking;
+
+  /**
+   * noise vs. sse weight for the nsse comparison function
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int nsse_weight;
+
+  /**
+   * motion estimation comparison function
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int me_cmp;
+  /**
+   * subpixel motion estimation comparison function
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int me_sub_cmp;
+  /**
+   * macroblock comparison function (not supported yet)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int mb_cmp;
+  /**
+   * interlaced DCT comparison function
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int ildct_cmp;
+#define FF_CMP_SAD 0
+#define FF_CMP_SSE 1
+#define FF_CMP_SATD 2
+#define FF_CMP_DCT 3
+#define FF_CMP_PSNR 4
+#define FF_CMP_BIT 5
+#define FF_CMP_RD 6
+#define FF_CMP_ZERO 7
+#define FF_CMP_VSAD 8
+#define FF_CMP_VSSE 9
+#define FF_CMP_NSSE 10
+#define FF_CMP_W53 11
+#define FF_CMP_W97 12
+#define FF_CMP_DCTMAX 13
+#define FF_CMP_DCT264 14
+#define FF_CMP_MEDIAN_SAD 15
+#define FF_CMP_CHROMA 256
+
+  /**
+   * ME diamond size & shape
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int dia_size;
+
+  /**
+   * amount of previous MV predictors (2a+1 x 2a+1 square)
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int last_predictor_count;
+
+  /**
+   * motion estimation prepass comparison function
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int me_pre_cmp;
+
+  /**
+   * ME prepass diamond size & shape
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int pre_dia_size;
+
+  /**
+   * subpel ME quality
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int me_subpel_quality;
+
+  /**
+   * maximum motion estimation search range in subpel units
+   * If 0 then no limit.
+   *
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int me_range;
+
+  /**
+   * macroblock decision mode
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int mb_decision;
+#define FF_MB_DECISION_SIMPLE 0  ///< uses mb_cmp
+#define FF_MB_DECISION_BITS 1  ///< chooses the one which needs the fewest bits
+#define FF_MB_DECISION_RD 2    ///< rate distortion
+
+  /**
+   * custom intra quantization matrix
+   * Must be allocated with the av_malloc() family of functions, and will be
+   * freed in avcodec_free_context().
+   * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
+   * - decoding: Set/allocated/freed by libavcodec.
+   */
+  uint16_t* intra_matrix;
+
+  /**
+   * custom inter quantization matrix
+   * Must be allocated with the av_malloc() family of functions, and will be
+   * freed in avcodec_free_context().
+   * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
+   * - decoding: Set/allocated/freed by libavcodec.
+   */
+  uint16_t* inter_matrix;
+
+  /**
+   * custom intra quantization matrix
+   * - encoding: Set by user, can be NULL.
+   * - decoding: unused.
+   */
+  uint16_t* chroma_intra_matrix;
+
+  /**
+   * precision of the intra DC coefficient - 8
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec
+   */
+  int intra_dc_precision;
+
+  /**
+   * minimum MB Lagrange multiplier
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int mb_lmin;
+
+  /**
+   * maximum MB Lagrange multiplier
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int mb_lmax;
+
+  /**
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int bidir_refine;
+
+  /**
+   * minimum GOP size
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int keyint_min;
+
+  /**
+   * the number of pictures in a group of pictures, or 0 for intra_only
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int gop_size;
+
+  /**
+   * Note: Value depends upon the compare function used for fullpel ME.
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int mv0_threshold;
+
+  /**
+   * Number of slices.
+   * Indicates number of picture subdivisions. Used for parallelized
+   * decoding.
+   * - encoding: Set by user
+   * - decoding: unused
+   */
+  int slices;
+
+  /* audio only */
+  int sample_rate;  ///< samples per second
+
+  /**
+   * audio sample format
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  enum AVSampleFormat sample_fmt;  ///< sample format
+
+  /**
+   * Audio channel layout.
+   * - encoding: must be set by the caller, to one of AVCodec.ch_layouts.
+   * - decoding: may be set by the caller if known e.g. from the container.
+   *             The decoder can then override during decoding as needed.
+   */
+  AVChannelLayout ch_layout;
+
+  /* The following data should not be initialized. */
+  /**
+   * Number of samples per channel in an audio frame.
+   *
+   * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
+   *   except the last must contain exactly frame_size samples per channel.
+   *   May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then
+   * the frame size is not restricted.
+   * - decoding: may be set by some decoders to indicate constant frame size
+   */
+  int frame_size;
+
+  /**
+   * number of bytes per packet if constant and known or 0
+   * Used by some WAV based audio codecs.
+   */
+  int block_align;
+
+  /**
+   * Audio cutoff bandwidth (0 means "automatic")
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int cutoff;
+
+  /**
+   * Type of service that the audio stream conveys.
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  enum AVAudioServiceType audio_service_type;
+
+  /**
+   * desired sample format
+   * - encoding: Not used.
+   * - decoding: Set by user.
+   * Decoder will decode to this format if it can.
+   */
+  enum AVSampleFormat request_sample_fmt;
+
+  /**
+   * Audio only. The number of "priming" samples (padding) inserted by the
+   * encoder at the beginning of the audio. I.e. this number of leading
+   * decoded samples must be discarded by the caller to get the original audio
+   * without leading padding.
+   *
+   * - decoding: unused
+   * - encoding: Set by libavcodec. The timestamps on the output packets are
+   *             adjusted by the encoder so that they always refer to the
+   *             first sample of the data actually contained in the packet,
+   *             including any added padding.  E.g. if the timebase is
+   *             1/samplerate and the timestamp of the first input sample is
+   *             0, the timestamp of the first output packet will be
+   *             -initial_padding.
+   */
+  int initial_padding;
+
+  /**
+   * Audio only. The amount of padding (in samples) appended by the encoder to
+   * the end of the audio. I.e. this number of decoded samples must be
+   * discarded by the caller from the end of the stream to get the original
+   * audio without any trailing padding.
+   *
+   * - decoding: unused
+   * - encoding: unused
+   */
+  int trailing_padding;
+
+  /**
+   * Number of samples to skip after a discontinuity
+   * - decoding: unused
+   * - encoding: set by libavcodec
+   */
+  int seek_preroll;
+
+  /**
+   * This callback is called at the beginning of each frame to get data
+   * buffer(s) for it. There may be one contiguous buffer for all the data or
+   * there may be a buffer per each data plane or anything in between. What
+   * this means is, you may set however many entries in buf[] you feel
+   * necessary. Each buffer must be reference-counted using the AVBuffer API
+   * (see description of buf[] below).
+   *
+   * The following fields will be set in the frame before this callback is
+   * called:
+   * - format
+   * - width, height (video only)
+   * - sample_rate, channel_layout, nb_samples (audio only)
+   * Their values may differ from the corresponding values in
+   * AVCodecContext. This callback must use the frame values, not the codec
+   * context values, to calculate the required buffer size.
+   *
+   * This callback must fill the following fields in the frame:
+   * - data[]
+   * - linesize[]
+   * - extended_data:
+   *   * if the data is planar audio with more than 8 channels, then this
+   *     callback must allocate and fill extended_data to contain all pointers
+   *     to all data planes. data[] must hold as many pointers as it can.
+   *     extended_data must be allocated with av_malloc() and will be freed in
+   *     av_frame_unref().
+   *   * otherwise extended_data must point to data
+   * - buf[] must contain one or more pointers to AVBufferRef structures. Each
+   * of the frame's data and extended_data pointers must be contained in these.
+   * That is, one AVBufferRef for each allocated chunk of memory, not
+   * necessarily one AVBufferRef per data[] entry. See: av_buffer_create(),
+   * av_buffer_alloc(), and av_buffer_ref().
+   * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
+   *   this callback and filled with the extra buffers if there are more
+   *   buffers than buf[] can hold. extended_buf will be freed in
+   *   av_frame_unref().
+   *
+   * If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call
+   * avcodec_default_get_buffer2() instead of providing buffers allocated by
+   * some other means.
+   *
+   * Each data plane must be aligned to the maximum required by the target
+   * CPU.
+   *
+   * @see avcodec_default_get_buffer2()
+   *
+   * Video:
+   *
+   * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
+   * (read and/or written to if it is writable) later by libavcodec.
+   *
+   * avcodec_align_dimensions2() should be used to find the required width and
+   * height, as they normally need to be rounded up to the next multiple of 16.
+   *
+   * Some decoders do not support linesizes changing between frames.
+   *
+   * If frame multithreading is used, this callback may be called from a
+   * different thread, but not from more than one at once. Does not need to be
+   * reentrant.
+   *
+   * @see avcodec_align_dimensions2()
+   *
+   * Audio:
+   *
+   * Decoders request a buffer of a particular size by setting
+   * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
+   * however, utilize only part of the buffer by setting AVFrame.nb_samples
+   * to a smaller value in the output frame.
+   *
+   * As a convenience, av_samples_get_buffer_size() and
+   * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
+   * functions to find the required data size and to fill data pointers and
+   * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
+   * since all planes must be the same size.
+   *
+   * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
+   *
+   * - encoding: unused
+   * - decoding: Set by libavcodec, user can override.
+   */
+  int (*get_buffer2)(struct AVCodecContext* s, AVFrame* frame, int flags);
+
+  /* - encoding parameters */
+  /**
+   * number of bits the bitstream is allowed to diverge from the reference.
+   *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
+   * - encoding: Set by user; unused for constant quantizer encoding.
+   * - decoding: unused
+   */
+  int bit_rate_tolerance;
+
+  /**
+   * Global quality for codecs which cannot change it per frame.
+   * This should be proportional to MPEG-1/2/4 qscale.
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int global_quality;
+
+  /**
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int compression_level;
+#define FF_COMPRESSION_DEFAULT -1
+
+  float qcompress;  ///< amount of qscale change between easy & hard scenes
+                    ///< (0.0-1.0)
+  float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
+
+  /**
+   * minimum quantizer
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int qmin;
+
+  /**
+   * maximum quantizer
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int qmax;
+
+  /**
+   * maximum quantizer difference between frames
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int max_qdiff;
+
+  /**
+   * decoder bitstream buffer size
+   * - encoding: Set by user.
+   * - decoding: May be set by libavcodec.
+   */
+  int rc_buffer_size;
+
+  /**
+   * ratecontrol override, see RcOverride
+   * - encoding: Allocated/set/freed by user.
+   * - decoding: unused
+   */
+  int rc_override_count;
+  RcOverride* rc_override;
+
+  /**
+   * maximum bitrate
+   * - encoding: Set by user.
+   * - decoding: Set by user, may be overwritten by libavcodec.
+   */
+  int64_t rc_max_rate;
+
+  /**
+   * minimum bitrate
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int64_t rc_min_rate;
+
+  /**
+   * Ratecontrol attempt to use, at maximum, <value> of what can be used without
+   * an underflow.
+   * - encoding: Set by user.
+   * - decoding: unused.
+   */
+  float rc_max_available_vbv_use;
+
+  /**
+   * Ratecontrol attempt to use, at least, <value> times the amount needed to
+   * prevent a vbv overflow.
+   * - encoding: Set by user.
+   * - decoding: unused.
+   */
+  float rc_min_vbv_overflow_use;
+
+  /**
+   * Number of bits which should be loaded into the rc buffer before decoding
+   * starts.
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int rc_initial_buffer_occupancy;
+
+  /**
+   * trellis RD quantization
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int trellis;
+
+  /**
+   * pass1 encoding statistics output buffer
+   * - encoding: Set by libavcodec.
+   * - decoding: unused
+   */
+  char* stats_out;
+
+  /**
+   * pass2 encoding statistics input buffer
+   * Concatenated stuff from stats_out of pass1 should be placed here.
+   * - encoding: Allocated/set/freed by user.
+   * - decoding: unused
+   */
+  char* stats_in;
+
+  /**
+   * Work around bugs in encoders which sometimes cannot be detected
+   * automatically.
+   * - encoding: Set by user
+   * - decoding: Set by user
+   */
+  int workaround_bugs;
+#define FF_BUG_AUTODETECT 1  ///< autodetection
+#define FF_BUG_XVID_ILACE 4
+#define FF_BUG_UMP4 8
+#define FF_BUG_NO_PADDING 16
+#define FF_BUG_AMV 32
+#define FF_BUG_QPEL_CHROMA 64
+#define FF_BUG_STD_QPEL 128
+#define FF_BUG_QPEL_CHROMA2 256
+#define FF_BUG_DIRECT_BLOCKSIZE 512
+#define FF_BUG_EDGE 1024
+#define FF_BUG_HPEL_CHROMA 2048
+#define FF_BUG_DC_CLIP 4096
+#define FF_BUG_MS \
+  8192  ///< Work around various bugs in Microsoft's broken decoders.
+#define FF_BUG_TRUNCATED 16384
+#define FF_BUG_IEDGE 32768
+
+  /**
+   * strictly follow the standard (MPEG-4, ...).
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   * Setting this to STRICT or higher means the encoder and decoder will
+   * generally do stupid things, whereas setting it to unofficial or lower
+   * will mean the encoder might produce output that is not supported by all
+   * spec-compliant decoders. Decoders don't differentiate between normal,
+   * unofficial and experimental (that is, they always try to decode things
+   * when they can) unless they are explicitly asked to behave stupidly
+   * (=strictly conform to the specs)
+   * This may only be set to one of the FF_COMPLIANCE_* values in defs.h.
+   */
+  int strict_std_compliance;
+
+  /**
+   * error concealment flags
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  int error_concealment;
+#define FF_EC_GUESS_MVS 1
+#define FF_EC_DEBLOCK 2
+#define FF_EC_FAVOR_INTER 256
+
+  /**
+   * debug
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int debug;
+#define FF_DEBUG_PICT_INFO 1
+#define FF_DEBUG_RC 2
+#define FF_DEBUG_BITSTREAM 4
+#define FF_DEBUG_MB_TYPE 8
+#define FF_DEBUG_QP 16
+#define FF_DEBUG_DCT_COEFF 0x00000040
+#define FF_DEBUG_SKIP 0x00000080
+#define FF_DEBUG_STARTCODE 0x00000100
+#define FF_DEBUG_ER 0x00000400
+#define FF_DEBUG_MMCO 0x00000800
+#define FF_DEBUG_BUGS 0x00001000
+#define FF_DEBUG_BUFFERS 0x00008000
+#define FF_DEBUG_THREADS 0x00010000
+#define FF_DEBUG_GREEN_MD 0x00800000
+#define FF_DEBUG_NOMC 0x01000000
+
+  /**
+   * Error recognition; may misdetect some more or less valid parts as errors.
+   * This is a bitfield of the AV_EF_* values defined in defs.h.
+   *
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int err_recognition;
+
+  /**
+   * Hardware accelerator in use
+   * - encoding: unused.
+   * - decoding: Set by libavcodec
+   */
+  const struct AVHWAccel* hwaccel;
+
+  /**
+   * Legacy hardware accelerator context.
+   *
+   * For some hardware acceleration methods, the caller may use this field to
+   * signal hwaccel-specific data to the codec. The struct pointed to by this
+   * pointer is hwaccel-dependent and defined in the respective header. Please
+   * refer to the FFmpeg HW accelerator documentation to know how to fill
+   * this.
+   *
+   * In most cases this field is optional - the necessary information may also
+   * be provided to libavcodec through @ref hw_frames_ctx or @ref
+   * hw_device_ctx (see avcodec_get_hw_config()). However, in some cases it
+   * may be the only method of signalling some (optional) information.
+   *
+   * The struct and its contents are owned by the caller.
+   *
+   * - encoding: May be set by the caller before avcodec_open2(). Must remain
+   *             valid until avcodec_free_context().
+   * - decoding: May be set by the caller in the get_format() callback.
+   *             Must remain valid until the next get_format() call,
+   *             or avcodec_free_context() (whichever comes first).
+   */
+  void* hwaccel_context;
+
+  /**
+   * A reference to the AVHWFramesContext describing the input (for encoding)
+   * or output (decoding) frames. The reference is set by the caller and
+   * afterwards owned (and freed) by libavcodec - it should never be read by
+   * the caller after being set.
+   *
+   * - decoding: This field should be set by the caller from the get_format()
+   *             callback. The previous reference (if any) will always be
+   *             unreffed by libavcodec before the get_format() call.
+   *
+   *             If the default get_buffer2() is used with a hwaccel pixel
+   *             format, then this AVHWFramesContext will be used for
+   *             allocating the frame buffers.
+   *
+   * - encoding: For hardware encoders configured to use a hwaccel pixel
+   *             format, this field should be set by the caller to a reference
+   *             to the AVHWFramesContext describing input frames.
+   *             AVHWFramesContext.format must be equal to
+   *             AVCodecContext.pix_fmt.
+   *
+   *             This field should be set before avcodec_open2() is called.
+   */
+  AVBufferRef* hw_frames_ctx;
+
+  /**
+   * A reference to the AVHWDeviceContext describing the device which will
+   * be used by a hardware encoder/decoder.  The reference is set by the
+   * caller and afterwards owned (and freed) by libavcodec.
+   *
+   * This should be used if either the codec device does not require
+   * hardware frames or any that are used are to be allocated internally by
+   * libavcodec.  If the user wishes to supply any of the frames used as
+   * encoder input or decoder output then hw_frames_ctx should be used
+   * instead.  When hw_frames_ctx is set in get_format() for a decoder, this
+   * field will be ignored while decoding the associated stream segment, but
+   * may again be used on a following one after another get_format() call.
+   *
+   * For both encoders and decoders this field should be set before
+   * avcodec_open2() is called and must not be written to thereafter.
+   *
+   * Note that some decoders may require this field to be set initially in
+   * order to support hw_frames_ctx at all - in that case, all frames
+   * contexts used must be created on the same device.
+   */
+  AVBufferRef* hw_device_ctx;
+
+  /**
+   * Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated
+   * decoding (if active).
+   * - encoding: unused
+   * - decoding: Set by user (either before avcodec_open2(), or in the
+   *             AVCodecContext.get_format callback)
+   */
+  int hwaccel_flags;
+
+  /**
+   * Video decoding only.  Sets the number of extra hardware frames which
+   * the decoder will allocate for use by the caller.  This must be set
+   * before avcodec_open2() is called.
+   *
+   * Some hardware decoders require all frames that they will use for
+   * output to be defined in advance before decoding starts.  For such
+   * decoders, the hardware frame pool must therefore be of a fixed size.
+   * The extra frames set here are on top of any number that the decoder
+   * needs internally in order to operate normally (for example, frames
+   * used as reference pictures).
+   */
+  int extra_hw_frames;
+
+  /**
+   * error
+   * - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR.
+   * - decoding: unused
+   */
+  uint64_t error[AV_NUM_DATA_POINTERS];
+
+  /**
+   * DCT algorithm, see FF_DCT_* below
+   * - encoding: Set by user.
+   * - decoding: unused
+   */
+  int dct_algo;
+#define FF_DCT_AUTO 0
+#define FF_DCT_FASTINT 1
+#define FF_DCT_INT 2
+#define FF_DCT_MMX 3
+#define FF_DCT_ALTIVEC 5
+#define FF_DCT_FAAN 6
+
+  /**
+   * IDCT algorithm, see FF_IDCT_* below.
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int idct_algo;
+#define FF_IDCT_AUTO 0
+#define FF_IDCT_INT 1
+#define FF_IDCT_SIMPLE 2
+#define FF_IDCT_SIMPLEMMX 3
+#define FF_IDCT_ARM 7
+#define FF_IDCT_ALTIVEC 8
+#define FF_IDCT_SIMPLEARM 10
+#define FF_IDCT_XVID 14
+#define FF_IDCT_SIMPLEARMV5TE 16
+#define FF_IDCT_SIMPLEARMV6 17
+#define FF_IDCT_FAAN 20
+#define FF_IDCT_SIMPLENEON 22
+#define FF_IDCT_SIMPLEAUTO 128
+
+  /**
+   * bits per sample/pixel from the demuxer (needed for huffyuv).
+   * - encoding: Set by libavcodec.
+   * - decoding: Set by user.
+   */
+  int bits_per_coded_sample;
+
+  /**
+   * Bits per sample/pixel of internal libavcodec pixel/sample format.
+   * - encoding: set by user.
+   * - decoding: set by libavcodec.
+   */
+  int bits_per_raw_sample;
+
+  /**
+   * thread count
+   * is used to decide how many independent tasks should be passed to execute()
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  int thread_count;
+
+  /**
+   * Which multithreading methods to use.
+   * Use of FF_THREAD_FRAME will increase decoding delay by one frame per
+   * thread, so clients which cannot provide future frames should not use it.
+   *
+   * - encoding: Set by user, otherwise the default is used.
+   * - decoding: Set by user, otherwise the default is used.
+   */
+  int thread_type;
+#define FF_THREAD_FRAME 1  ///< Decode more than one frame at once
+#define FF_THREAD_SLICE \
+  2  ///< Decode more than one part of a single frame at once
+
+  /**
+   * Which multithreading methods are in use by the codec.
+   * - encoding: Set by libavcodec.
+   * - decoding: Set by libavcodec.
+   */
+  int active_thread_type;
+
+  /**
+   * The codec may call this to execute several independent things.
+   * It will return only after finishing all tasks.
+   * The user may replace this with some multithreaded implementation,
+   * the default implementation will execute the parts serially.
+   * @param count the number of things to execute
+   * - encoding: Set by libavcodec, user can override.
+   * - decoding: Set by libavcodec, user can override.
+   */
+  int (*execute)(struct AVCodecContext* c,
+                 int (*func)(struct AVCodecContext* c2, void* arg), void* arg2,
+                 int* ret, int count, int size);
+
+  /**
+   * The codec may call this to execute several independent things.
+   * It will return only after finishing all tasks.
+   * The user may replace this with some multithreaded implementation,
+   * the default implementation will execute the parts serially.
+   * @param c context passed also to func
+   * @param count the number of things to execute
+   * @param arg2 argument passed unchanged to func
+   * @param ret return values of executed functions, must have space for "count"
+   * values. May be NULL.
+   * @param func function that will be called count times, with jobnr from 0 to
+   * count-1. threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS
+   * and so that no two instances of func executing at the same time will have
+   * the same threadnr.
+   * @return always 0 currently, but code should handle a future improvement
+   * where when any call to func returns < 0 no further calls to func may be
+   * done and < 0 is returned.
+   * - encoding: Set by libavcodec, user can override.
+   * - decoding: Set by libavcodec, user can override.
+   */
+  int (*execute2)(struct AVCodecContext* c,
+                  int (*func)(struct AVCodecContext* c2, void* arg, int jobnr,
+                              int threadnr),
+                  void* arg2, int* ret, int count);
+
+  /**
+   * profile
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   * See the AV_PROFILE_* defines in defs.h.
+   */
+  int profile;
+#if FF_API_FF_PROFILE_LEVEL
+  /** @deprecated The following defines are deprecated; use AV_PROFILE_*
+   * in defs.h instead. */
+#  define FF_PROFILE_UNKNOWN -99
+#  define FF_PROFILE_RESERVED -100
+
+#  define FF_PROFILE_AAC_MAIN 0
+#  define FF_PROFILE_AAC_LOW 1
+#  define FF_PROFILE_AAC_SSR 2
+#  define FF_PROFILE_AAC_LTP 3
+#  define FF_PROFILE_AAC_HE 4
+#  define FF_PROFILE_AAC_HE_V2 28
+#  define FF_PROFILE_AAC_LD 22
+#  define FF_PROFILE_AAC_ELD 38
+#  define FF_PROFILE_MPEG2_AAC_LOW 128
+#  define FF_PROFILE_MPEG2_AAC_HE 131
+
+#  define FF_PROFILE_DNXHD 0
+#  define FF_PROFILE_DNXHR_LB 1
+#  define FF_PROFILE_DNXHR_SQ 2
+#  define FF_PROFILE_DNXHR_HQ 3
+#  define FF_PROFILE_DNXHR_HQX 4
+#  define FF_PROFILE_DNXHR_444 5
+
+#  define FF_PROFILE_DTS 20
+#  define FF_PROFILE_DTS_ES 30
+#  define FF_PROFILE_DTS_96_24 40
+#  define FF_PROFILE_DTS_HD_HRA 50
+#  define FF_PROFILE_DTS_HD_MA 60
+#  define FF_PROFILE_DTS_EXPRESS 70
+#  define FF_PROFILE_DTS_HD_MA_X 61
+#  define FF_PROFILE_DTS_HD_MA_X_IMAX 62
+
+#  define FF_PROFILE_EAC3_DDP_ATMOS 30
+
+#  define FF_PROFILE_TRUEHD_ATMOS 30
+
+#  define FF_PROFILE_MPEG2_422 0
+#  define FF_PROFILE_MPEG2_HIGH 1
+#  define FF_PROFILE_MPEG2_SS 2
+#  define FF_PROFILE_MPEG2_SNR_SCALABLE 3
+#  define FF_PROFILE_MPEG2_MAIN 4
+#  define FF_PROFILE_MPEG2_SIMPLE 5
+
+#  define FF_PROFILE_H264_CONSTRAINED (1 << 9)  // 8+1; constraint_set1_flag
+#  define FF_PROFILE_H264_INTRA (1 << 11)       // 8+3; constraint_set3_flag
+
+#  define FF_PROFILE_H264_BASELINE 66
+#  define FF_PROFILE_H264_CONSTRAINED_BASELINE \
+    (66 | FF_PROFILE_H264_CONSTRAINED)
+#  define FF_PROFILE_H264_MAIN 77
+#  define FF_PROFILE_H264_EXTENDED 88
+#  define FF_PROFILE_H264_HIGH 100
+#  define FF_PROFILE_H264_HIGH_10 110
+#  define FF_PROFILE_H264_HIGH_10_INTRA (110 | FF_PROFILE_H264_INTRA)
+#  define FF_PROFILE_H264_MULTIVIEW_HIGH 118
+#  define FF_PROFILE_H264_HIGH_422 122
+#  define FF_PROFILE_H264_HIGH_422_INTRA (122 | FF_PROFILE_H264_INTRA)
+#  define FF_PROFILE_H264_STEREO_HIGH 128
+#  define FF_PROFILE_H264_HIGH_444 144
+#  define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
+#  define FF_PROFILE_H264_HIGH_444_INTRA (244 | FF_PROFILE_H264_INTRA)
+#  define FF_PROFILE_H264_CAVLC_444 44
+
+#  define FF_PROFILE_VC1_SIMPLE 0
+#  define FF_PROFILE_VC1_MAIN 1
+#  define FF_PROFILE_VC1_COMPLEX 2
+#  define FF_PROFILE_VC1_ADVANCED 3
+
+#  define FF_PROFILE_MPEG4_SIMPLE 0
+#  define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
+#  define FF_PROFILE_MPEG4_CORE 2
+#  define FF_PROFILE_MPEG4_MAIN 3
+#  define FF_PROFILE_MPEG4_N_BIT 4
+#  define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
+#  define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
+#  define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
+#  define FF_PROFILE_MPEG4_HYBRID 8
+#  define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
+#  define FF_PROFILE_MPEG4_CORE_SCALABLE 10
+#  define FF_PROFILE_MPEG4_ADVANCED_CODING 11
+#  define FF_PROFILE_MPEG4_ADVANCED_CORE 12
+#  define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
+#  define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
+#  define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
+
+#  define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1
+#  define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2
+#  define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768
+#  define FF_PROFILE_JPEG2000_DCINEMA_2K 3
+#  define FF_PROFILE_JPEG2000_DCINEMA_4K 4
+
+#  define FF_PROFILE_VP9_0 0
+#  define FF_PROFILE_VP9_1 1
+#  define FF_PROFILE_VP9_2 2
+#  define FF_PROFILE_VP9_3 3
+
+#  define FF_PROFILE_HEVC_MAIN 1
+#  define FF_PROFILE_HEVC_MAIN_10 2
+#  define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3
+#  define FF_PROFILE_HEVC_REXT 4
+#  define FF_PROFILE_HEVC_SCC 9
+
+#  define FF_PROFILE_VVC_MAIN_10 1
+#  define FF_PROFILE_VVC_MAIN_10_444 33
+
+#  define FF_PROFILE_AV1_MAIN 0
+#  define FF_PROFILE_AV1_HIGH 1
+#  define FF_PROFILE_AV1_PROFESSIONAL 2
+
+#  define FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT 0xc0
+#  define FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT 0xc1
+#  define FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT 0xc2
+#  define FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS 0xc3
+#  define FF_PROFILE_MJPEG_JPEG_LS 0xf7
+
+#  define FF_PROFILE_SBC_MSBC 1
+
+#  define FF_PROFILE_PRORES_PROXY 0
+#  define FF_PROFILE_PRORES_LT 1
+#  define FF_PROFILE_PRORES_STANDARD 2
+#  define FF_PROFILE_PRORES_HQ 3
+#  define FF_PROFILE_PRORES_4444 4
+#  define FF_PROFILE_PRORES_XQ 5
+
+#  define FF_PROFILE_ARIB_PROFILE_A 0
+#  define FF_PROFILE_ARIB_PROFILE_C 1
+
+#  define FF_PROFILE_KLVA_SYNC 0
+#  define FF_PROFILE_KLVA_ASYNC 1
+
+#  define FF_PROFILE_EVC_BASELINE 0
+#  define FF_PROFILE_EVC_MAIN 1
+#endif
+
+  /**
+   * Encoding level descriptor.
+   * - encoding: Set by user, corresponds to a specific level defined by the
+   *   codec, usually corresponding to the profile level, if not specified it
+   *   is set to FF_LEVEL_UNKNOWN.
+   * - decoding: Set by libavcodec.
+   * See AV_LEVEL_* in defs.h.
+   */
+  int level;
+#if FF_API_FF_PROFILE_LEVEL
+  /** @deprecated The following define is deprecated; use AV_LEVEL_UNKOWN
+   * in defs.h instead. */
+#  define FF_LEVEL_UNKNOWN -99
+#endif
+
+  /**
+   * Properties of the stream that gets decoded
+   * - encoding: unused
+   * - decoding: set by libavcodec
+   */
+  unsigned properties;
+#define FF_CODEC_PROPERTY_LOSSLESS 0x00000001
+#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002
+#define FF_CODEC_PROPERTY_FILM_GRAIN 0x00000004
+
+  /**
+   * Skip loop filtering for selected frames.
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  enum AVDiscard skip_loop_filter;
+
+  /**
+   * Skip IDCT/dequantization for selected frames.
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  enum AVDiscard skip_idct;
+
+  /**
+   * Skip decoding for selected frames.
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  enum AVDiscard skip_frame;
+
+  /**
+   * Skip processing alpha if supported by codec.
+   * Note that if the format uses pre-multiplied alpha (common with VP6,
+   * and recommended due to better video quality/compression)
+   * the image will look as if alpha-blended onto a black background.
+   * However for formats that do not use pre-multiplied alpha
+   * there might be serious artefacts (though e.g. libswscale currently
+   * assumes pre-multiplied alpha anyway).
+   *
+   * - decoding: set by user
+   * - encoding: unused
+   */
+  int skip_alpha;
+
+  /**
+   * Number of macroblock rows at the top which are skipped.
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  int skip_top;
+
+  /**
+   * Number of macroblock rows at the bottom which are skipped.
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  int skip_bottom;
+
+  /**
+   * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+   * - encoding: unused
+   * - decoding: Set by user.
+   */
+  int lowres;
+
+  /**
+   * AVCodecDescriptor
+   * - encoding: unused.
+   * - decoding: set by libavcodec.
+   */
+  const struct AVCodecDescriptor* codec_descriptor;
+
+  /**
+   * Character encoding of the input subtitles file.
+   * - decoding: set by user
+   * - encoding: unused
+   */
+  char* sub_charenc;
+
+  /**
+   * Subtitles character encoding mode. Formats or codecs might be adjusting
+   * this setting (if they are doing the conversion themselves for instance).
+   * - decoding: set by libavcodec
+   * - encoding: unused
+   */
+  int sub_charenc_mode;
+#define FF_SUB_CHARENC_MODE_DO_NOTHING \
+  -1  ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8,
+      ///< or the codec is bitmap for instance)
+#define FF_SUB_CHARENC_MODE_AUTOMATIC \
+  0  ///< libavcodec will select the mode itself
+#define FF_SUB_CHARENC_MODE_PRE_DECODER \
+  1  ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the
+     ///< decoder, requires iconv
+#define FF_SUB_CHARENC_MODE_IGNORE \
+  2  ///< neither convert the subtitles, nor check them for valid UTF-8
+
+  /**
+   * Header containing style information for text subtitles.
+   * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
+   * [Script Info] and [V4+ Styles] section, plus the [Events] line and
+   * the Format line following. It shouldn't include any Dialogue line.
+   * - encoding: Set/allocated/freed by user (before avcodec_open2())
+   * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
+   */
+  int subtitle_header_size;
+  uint8_t* subtitle_header;
+
+  /**
+   * dump format separator.
+   * can be ", " or "\n      " or anything else
+   * - encoding: Set by user.
+   * - decoding: Set by user.
+   */
+  uint8_t* dump_separator;
+
+  /**
+   * ',' separated list of allowed decoders.
+   * If NULL then all are allowed
+   * - encoding: unused
+   * - decoding: set by user
+   */
+  char* codec_whitelist;
+
+  /**
+   * Additional data associated with the entire coded stream.
+   *
+   * - decoding: may be set by user before calling avcodec_open2().
+   * - encoding: may be set by libavcodec after avcodec_open2().
+   */
+  AVPacketSideData* coded_side_data;
+  int nb_coded_side_data;
+
+  /**
+   * Bit set of AV_CODEC_EXPORT_DATA_* flags, which affects the kind of
+   * metadata exported in frame, packet, or coded stream side data by
+   * decoders and encoders.
+   *
+   * - decoding: set by user
+   * - encoding: set by user
+   */
+  int export_side_data;
+
+  /**
+   * The number of pixels per image to maximally accept.
+   *
+   * - decoding: set by user
+   * - encoding: set by user
+   */
+  int64_t max_pixels;
+
+  /**
+   * Video decoding only. Certain video codecs support cropping, meaning that
+   * only a sub-rectangle of the decoded frame is intended for display.  This
+   * option controls how cropping is handled by libavcodec.
+   *
+   * When set to 1 (the default), libavcodec will apply cropping internally.
+   * I.e. it will modify the output frame width/height fields and offset the
+   * data pointers (only by as much as possible while preserving alignment, or
+   * by the full amount if the AV_CODEC_FLAG_UNALIGNED flag is set) so that
+   * the frames output by the decoder refer only to the cropped area. The
+   * crop_* fields of the output frames will be zero.
+   *
+   * When set to 0, the width/height fields of the output frames will be set
+   * to the coded dimensions and the crop_* fields will describe the cropping
+   * rectangle. Applying the cropping is left to the caller.
+   *
+   * @warning When hardware acceleration with opaque output frames is used,
+   * libavcodec is unable to apply cropping from the top/left border.
+   *
+   * @note when this option is set to zero, the width/height fields of the
+   * AVCodecContext and output AVFrames have different meanings. The codec
+   * context fields store display dimensions (with the coded dimensions in
+   * coded_width/height), while the frame fields store the coded dimensions
+   * (with the display dimensions being determined by the crop_* fields).
+   */
+  int apply_cropping;
+
+  /**
+   * The percentage of damaged samples to discard a frame.
+   *
+   * - decoding: set by user
+   * - encoding: unused
+   */
+  int discard_damaged_percentage;
+
+  /**
+   * The number of samples per frame to maximally accept.
+   *
+   * - decoding: set by user
+   * - encoding: set by user
+   */
+  int64_t max_samples;
+
+  /**
+   * This callback is called at the beginning of each packet to get a data
+   * buffer for it.
+   *
+   * The following field will be set in the packet before this callback is
+   * called:
+   * - size
+   * This callback must use the above value to calculate the required buffer
+   * size, which must padded by at least AV_INPUT_BUFFER_PADDING_SIZE bytes.
+   *
+   * In some specific cases, the encoder may not use the entire buffer allocated
+   * by this callback. This will be reflected in the size value in the packet
+   * once returned by avcodec_receive_packet().
+   *
+   * This callback must fill the following fields in the packet:
+   * - data: alignment requirements for AVPacket apply, if any. Some
+   * architectures and encoders may benefit from having aligned data.
+   * - buf: must contain a pointer to an AVBufferRef structure. The packet's
+   *   data pointer must be contained in it. See: av_buffer_create(),
+   * av_buffer_alloc(), and av_buffer_ref().
+   *
+   * If AV_CODEC_CAP_DR1 is not set then get_encode_buffer() must call
+   * avcodec_default_get_encode_buffer() instead of providing a buffer allocated
+   * by some other means.
+   *
+   * The flags field may contain a combination of AV_GET_ENCODE_BUFFER_FLAG_
+   * flags. They may be used for example to hint what use the buffer may get
+   * after being created. Implementations of this callback may ignore flags they
+   * don't understand. If AV_GET_ENCODE_BUFFER_FLAG_REF is set in flags then the
+   * packet may be reused (read and/or written to if it is writable) later by
+   * libavcodec.
+   *
+   * This callback must be thread-safe, as when frame threading is used, it may
+   * be called from multiple threads simultaneously.
+   *
+   * @see avcodec_default_get_encode_buffer()
+   *
+   * - encoding: Set by libavcodec, user can override.
+   * - decoding: unused
+   */
+  int (*get_encode_buffer)(struct AVCodecContext* s, AVPacket* pkt, int flags);
+
+  /**
+   * Frame counter, set by libavcodec.
+   *
+   * - decoding: total number of frames returned from the decoder so far.
+   * - encoding: total number of frames passed to the encoder so far.
+   *
+   *   @note the counter is not incremented if encoding/decoding resulted in
+   *   an error.
+   */
+  int64_t frame_num;
+
+  /**
+   * Decoding only. May be set by the caller before avcodec_open2() to an
+   * av_malloc()'ed array (or via AVOptions). Owned and freed by the decoder
+   * afterwards.
+   *
+   * Side data attached to decoded frames may come from several sources:
+   * 1. coded_side_data, which the decoder will for certain types translate
+   *    from packet-type to frame-type and attach to frames;
+   * 2. side data attached to an AVPacket sent for decoding (same
+   *    considerations as above);
+   * 3. extracted from the coded bytestream.
+   * The first two cases are supplied by the caller and typically come from a
+   * container.
+   *
+   * This array configures decoder behaviour in cases when side data of the
+   * same type is present both in the coded bytestream and in the
+   * user-supplied side data (items 1. and 2. above). In all cases, at most
+   * one instance of each side data type will be attached to output frames. By
+   * default it will be the bytestream side data. Adding an
+   * AVPacketSideDataType value to this array will flip the preference for
+   * this type, thus making the decoder prefer user-supplied side data over
+   * bytestream. In case side data of the same type is present both in
+   * coded_data and attacked to a packet, the packet instance always has
+   * priority.
+   *
+   * The array may also contain a single -1, in which case the preference is
+   * switched for all side data types.
+   */
+  int* side_data_prefer_packet;
+  /**
+   * Number of entries in side_data_prefer_packet.
+   */
+  unsigned nb_side_data_prefer_packet;
+
+  /**
+   * Array containing static side data, such as HDR10 CLL / MDCV structures.
+   * Side data entries should be allocated by usage of helpers defined in
+   * libavutil/frame.h.
+   *
+   * - encoding: may be set by user before calling avcodec_open2() for
+   *             encoder configuration. Afterwards owned and freed by the
+   *             encoder.
+   * - decoding: unused
+   */
+  AVFrameSideData** decoded_side_data;
+  int nb_decoded_side_data;
+} AVCodecContext;
+
+/**
+ * @defgroup lavc_hwaccel AVHWAccel
+ *
+ * @note  Nothing in this structure should be accessed by the user.  At some
+ *        point in future it will not be externally visible at all.
+ *
+ * @{
+ */
+typedef struct AVHWAccel {
+  /**
+   * Name of the hardware accelerated codec.
+   * The name is globally unique among encoders and among decoders (but an
+   * encoder and a decoder can share the same name).
+   */
+  const char* name;
+
+  /**
+   * Type of codec implemented by the hardware accelerator.
+   *
+   * See AVMEDIA_TYPE_xxx
+   */
+  enum AVMediaType type;
+
+  /**
+   * Codec implemented by the hardware accelerator.
+   *
+   * See AV_CODEC_ID_xxx
+   */
+  enum AVCodecID id;
+
+  /**
+   * Supported pixel format.
+   *
+   * Only hardware accelerated formats are supported here.
+   */
+  enum AVPixelFormat pix_fmt;
+
+  /**
+   * Hardware accelerated codec capabilities.
+   * see AV_HWACCEL_CODEC_CAP_*
+   */
+  int capabilities;
+} AVHWAccel;
+
+/**
+ * HWAccel is experimental and is thus avoided in favor of non experimental
+ * codecs
+ */
+#define AV_HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200
+
+/**
+ * Hardware acceleration should be used for decoding even if the codec level
+ * used is unknown or higher than the maximum supported level reported by the
+ * hardware driver.
+ *
+ * It's generally a good idea to pass this flag unless you have a specific
+ * reason not to, as hardware tends to under-report supported levels.
+ */
+#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
+
+/**
+ * Hardware acceleration can output YUV pixel formats with a different chroma
+ * sampling than 4:2:0 and/or other than 8 bits per component.
+ */
+#define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
+
+/**
+ * Hardware acceleration should still be attempted for decoding when the
+ * codec profile does not match the reported capabilities of the hardware.
+ *
+ * For example, this can be used to try to decode baseline profile H.264
+ * streams in hardware - it will often succeed, because many streams marked
+ * as baseline profile actually conform to constrained baseline profile.
+ *
+ * @warning If the stream is actually not supported then the behaviour is
+ *          undefined, and may include returning entirely incorrect output
+ *          while indicating success.
+ */
+#define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
+
+/**
+ * Some hardware decoders (namely nvdec) can either output direct decoder
+ * surfaces, or make an on-device copy and return said copy.
+ * There is a hard limit on how many decoder surfaces there can be, and it
+ * cannot be accurately guessed ahead of time.
+ * For some processing chains, this can be okay, but others will run into the
+ * limit and in turn produce very confusing errors that require fine tuning of
+ * more or less obscure options by the user, or in extreme cases cannot be
+ * resolved at all without inserting an avfilter that forces a copy.
+ *
+ * Thus, the hwaccel will by default make a copy for safety and resilience.
+ * If a users really wants to minimize the amount of copies, they can set this
+ * flag and ensure their processing chain does not exhaust the surface pool.
+ */
+#define AV_HWACCEL_FLAG_UNSAFE_OUTPUT (1 << 3)
+
+/**
+ * @}
+ */
+
+enum AVSubtitleType {
+  SUBTITLE_NONE,
+
+  SUBTITLE_BITMAP,  ///< A bitmap, pict will be set
+
+  /**
+   * Plain text, the text field must be set by the decoder and is
+   * authoritative. ass and pict fields may contain approximations.
+   */
+  SUBTITLE_TEXT,
+
+  /**
+   * Formatted text, the ass field must be set by the decoder and is
+   * authoritative. pict and text fields may contain approximations.
+   */
+  SUBTITLE_ASS,
+};
+
+#define AV_SUBTITLE_FLAG_FORCED 0x00000001
+
+typedef struct AVSubtitleRect {
+  int x;          ///< top left corner  of pict, undefined when pict is not set
+  int y;          ///< top left corner  of pict, undefined when pict is not set
+  int w;          ///< width            of pict, undefined when pict is not set
+  int h;          ///< height           of pict, undefined when pict is not set
+  int nb_colors;  ///< number of colors in pict, undefined when pict is not set
+
+  /**
+   * data+linesize for the bitmap of this subtitle.
+   * Can be set for text/ass as well once they are rendered.
+   */
+  uint8_t* data[4];
+  int linesize[4];
+
+  int flags;
+  enum AVSubtitleType type;
+
+  char* text;  ///< 0 terminated plain UTF-8 text
+
+  /**
+   * 0 terminated ASS/SSA compatible event line.
+   * The presentation of this is unaffected by the other values in this
+   * struct.
+   */
+  char* ass;
+} AVSubtitleRect;
+
+typedef struct AVSubtitle {
+  uint16_t format;             /* 0 = graphics */
+  uint32_t start_display_time; /* relative to packet pts, in ms */
+  uint32_t end_display_time;   /* relative to packet pts, in ms */
+  unsigned num_rects;
+  AVSubtitleRect** rects;
+  int64_t pts;  ///< Same as packet pts, in AV_TIME_BASE
+} AVSubtitle;
+
+/**
+ * Return the LIBAVCODEC_VERSION_INT constant.
+ */
+unsigned avcodec_version(void);
+
+/**
+ * Return the libavcodec build-time configuration.
+ */
+const char* avcodec_configuration(void);
+
+/**
+ * Return the libavcodec license.
+ */
+const char* avcodec_license(void);
+
+/**
+ * Allocate an AVCodecContext and set its fields to default values. The
+ * resulting struct should be freed with avcodec_free_context().
+ *
+ * @param codec if non-NULL, allocate private data and initialize defaults
+ *              for the given codec. It is illegal to then call avcodec_open2()
+ *              with a different codec.
+ *              If NULL, then the codec-specific defaults won't be initialized,
+ *              which may result in suboptimal default settings (this is
+ *              important mainly for encoders, e.g. libx264).
+ *
+ * @return An AVCodecContext filled with default values or NULL on failure.
+ */
+AVCodecContext* avcodec_alloc_context3(const AVCodec* codec);
+
+/**
+ * Free the codec context and everything associated with it and write NULL to
+ * the provided pointer.
+ */
+void avcodec_free_context(AVCodecContext** avctx);
+
+/**
+ * Get the AVClass for AVCodecContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass* avcodec_get_class(void);
+
+/**
+ * Get the AVClass for AVSubtitleRect. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass* avcodec_get_subtitle_rect_class(void);
+
+/**
+ * Fill the parameters struct based on the values from the supplied codec
+ * context. Any allocated fields in par are freed and replaced with duplicates
+ * of the corresponding fields in codec.
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure
+ */
+int avcodec_parameters_from_context(struct AVCodecParameters* par,
+                                    const AVCodecContext* codec);
+
+/**
+ * Fill the codec context based on the values from the supplied codec
+ * parameters. Any allocated fields in codec that have a corresponding field in
+ * par are freed and replaced with duplicates of the corresponding field in par.
+ * Fields in codec that do not have a counterpart in par are not touched.
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure.
+ */
+int avcodec_parameters_to_context(AVCodecContext* codec,
+                                  const struct AVCodecParameters* par);
+
+/**
+ * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
+ * function the context has to be allocated with avcodec_alloc_context3().
+ *
+ * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
+ * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
+ * retrieving a codec.
+ *
+ * Depending on the codec, you might need to set options in the codec context
+ * also for decoding (e.g. width, height, or the pixel or audio sample format in
+ * the case the information is not available in the bitstream, as when decoding
+ * raw audio or video).
+ *
+ * Options in the codec context can be set either by setting them in the options
+ * AVDictionary, or by setting the values in the context itself, directly or by
+ * using the av_opt_set() API before calling this function.
+ *
+ * Example:
+ * @code
+ * av_dict_set(&opts, "b", "2.5M", 0);
+ * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
+ * if (!codec)
+ *     exit(1);
+ *
+ * context = avcodec_alloc_context3(codec);
+ *
+ * if (avcodec_open2(context, codec, opts) < 0)
+ *     exit(1);
+ * @endcode
+ *
+ * In the case AVCodecParameters are available (e.g. when demuxing a stream
+ * using libavformat, and accessing the AVStream contained in the demuxer), the
+ * codec parameters can be copied to the codec context using
+ * avcodec_parameters_to_context(), as in the following example:
+ *
+ * @code
+ * AVStream *stream = ...;
+ * context = avcodec_alloc_context3(codec);
+ * if (avcodec_parameters_to_context(context, stream->codecpar) < 0)
+ *     exit(1);
+ * if (avcodec_open2(context, codec, NULL) < 0)
+ *     exit(1);
+ * @endcode
+ *
+ * @note Always call this function before using decoding routines (such as
+ * @ref avcodec_receive_frame()).
+ *
+ * @param avctx The context to initialize.
+ * @param codec The codec to open this context for. If a non-NULL codec has been
+ *              previously passed to avcodec_alloc_context3() or
+ *              for this context, then this parameter MUST be either NULL or
+ *              equal to the previously passed codec.
+ * @param options A dictionary filled with AVCodecContext and codec-private
+ *                options, which are set on top of the options already set in
+ *                avctx, can be NULL. On return this object will be filled with
+ *                options that were not found in the avctx codec context.
+ *
+ * @return zero on success, a negative value on error
+ * @see avcodec_alloc_context3(), avcodec_find_decoder(),
+ * avcodec_find_encoder(), av_dict_set(), av_opt_set(), av_opt_find(),
+ * avcodec_parameters_to_context()
+ */
+int avcodec_open2(AVCodecContext* avctx, const AVCodec* codec,
+                  AVDictionary** options);
+
+#if FF_API_AVCODEC_CLOSE
+/**
+ * Close a given AVCodecContext and free all the data associated with it
+ * (but not the AVCodecContext itself).
+ *
+ * Calling this function on an AVCodecContext that hasn't been opened will free
+ * the codec-specific data allocated in avcodec_alloc_context3() with a non-NULL
+ * codec. Subsequent calls will do nothing.
+ *
+ * @deprecated Do not use this function. Use avcodec_free_context() to destroy a
+ * codec context (either open or closed). Opening and closing a codec context
+ * multiple times is not supported anymore -- use multiple codec contexts
+ * instead.
+ */
+attribute_deprecated int avcodec_close(AVCodecContext* avctx);
+#endif
+
+/**
+ * Free all allocated data in the given subtitle struct.
+ *
+ * @param sub AVSubtitle to free.
+ */
+void avsubtitle_free(AVSubtitle* sub);
+
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavc_decoding
+ * @{
+ */
+
+/**
+ * The default callback for AVCodecContext.get_buffer2(). It is made public so
+ * it can be called by custom get_buffer2() implementations for decoders without
+ * AV_CODEC_CAP_DR1 set.
+ */
+int avcodec_default_get_buffer2(AVCodecContext* s, AVFrame* frame, int flags);
+
+/**
+ * The default callback for AVCodecContext.get_encode_buffer(). It is made
+ * public so it can be called by custom get_encode_buffer() implementations for
+ * encoders without AV_CODEC_CAP_DR1 set.
+ */
+int avcodec_default_get_encode_buffer(AVCodecContext* s, AVPacket* pkt,
+                                      int flags);
+
+/**
+ * Modify width and height values so that they will result in a memory
+ * buffer that is acceptable for the codec if you do not use any horizontal
+ * padding.
+ *
+ * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
+ */
+void avcodec_align_dimensions(AVCodecContext* s, int* width, int* height);
+
+/**
+ * Modify width and height values so that they will result in a memory
+ * buffer that is acceptable for the codec if you also ensure that all
+ * line sizes are a multiple of the respective linesize_align[i].
+ *
+ * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
+ */
+void avcodec_align_dimensions2(AVCodecContext* s, int* width, int* height,
+                               int linesize_align[AV_NUM_DATA_POINTERS]);
+
+/**
+ * Decode a subtitle message.
+ * Return a negative value on error, otherwise return the number of bytes used.
+ * If no subtitle could be decompressed, got_sub_ptr is zero.
+ * Otherwise, the subtitle is stored in *sub.
+ * Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for
+ * simplicity, because the performance difference is expected to be negligible
+ * and reusing a get_buffer written for video codecs would probably perform
+ * badly due to a potentially very different allocation pattern.
+ *
+ * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between
+ * input and output. This means that for some packets they will not immediately
+ * produce decoded output and need to be flushed at the end of decoding to get
+ * all the decoded data. Flushing is done by calling this function with packets
+ * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
+ * returning subtitles. It is safe to flush even those decoders that are not
+ * marked with AV_CODEC_CAP_DELAY, then no subtitles will be returned.
+ *
+ * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
+ * before packets may be fed to the decoder.
+ *
+ * @param avctx the codec context
+ * @param[out] sub The preallocated AVSubtitle in which the decoded subtitle
+ * will be stored, must be freed with avsubtitle_free if *got_sub_ptr is set.
+ * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed,
+ * otherwise, it is nonzero.
+ * @param[in] avpkt The input AVPacket containing the input buffer.
+ */
+int avcodec_decode_subtitle2(AVCodecContext* avctx, AVSubtitle* sub,
+                             int* got_sub_ptr, const AVPacket* avpkt);
+
+/**
+ * Supply raw packet data as input to a decoder.
+ *
+ * Internally, this call will copy relevant AVCodecContext fields, which can
+ * influence decoding per-packet, and apply them when the packet is actually
+ * decoded. (For example AVCodecContext.skip_frame, which might direct the
+ * decoder to drop the frame contained by the packet sent with this function.)
+ *
+ * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
+ *          larger than the actual read bytes because some optimized bitstream
+ *          readers read 32 or 64 bits at once and could read over the end.
+ *
+ * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
+ *       before packets may be fed to the decoder.
+ *
+ * @param avctx codec context
+ * @param[in] avpkt The input AVPacket. Usually, this will be a single video
+ *                  frame, or several complete audio frames.
+ *                  Ownership of the packet remains with the caller, and the
+ *                  decoder will not write to the packet. The decoder may create
+ *                  a reference to the packet data (or copy it if the packet is
+ *                  not reference-counted).
+ *                  Unlike with older APIs, the packet is always fully consumed,
+ *                  and if it contains multiple frames (e.g. some audio codecs),
+ *                  will require you to call avcodec_receive_frame() multiple
+ *                  times afterwards before you can send a new packet.
+ *                  It can be NULL (or an AVPacket with data set to NULL and
+ *                  size set to 0); in this case, it is considered a flush
+ *                  packet, which signals the end of the stream. Sending the
+ *                  first flush packet will return success. Subsequent ones are
+ *                  unnecessary and will return AVERROR_EOF. If the decoder
+ *                  still has frames buffered, it will return them after sending
+ *                  a flush packet.
+ *
+ * @retval 0                 success
+ * @retval AVERROR(EAGAIN)   input is not accepted in the current state - user
+ *                           must read output with avcodec_receive_frame() (once
+ *                           all output is read, the packet should be resent,
+ *                           and the call will not fail with EAGAIN).
+ * @retval AVERROR_EOF       the decoder has been flushed, and no new packets
+ * can be sent to it (also returned if more than 1 flush packet is sent)
+ * @retval AVERROR(EINVAL)   codec not opened, it is an encoder, or requires
+ * flush
+ * @retval AVERROR(ENOMEM)   failed to add packet to internal queue, or similar
+ * @retval "another negative error code" legitimate decoding errors
+ */
+int avcodec_send_packet(AVCodecContext* avctx, const AVPacket* avpkt);
+
+/**
+ * Return decoded output data from a decoder or encoder (when the
+ * @ref AV_CODEC_FLAG_RECON_FRAME flag is used).
+ *
+ * @param avctx codec context
+ * @param frame This will be set to a reference-counted video or audio
+ *              frame (depending on the decoder type) allocated by the
+ *              codec. Note that the function will always call
+ *              av_frame_unref(frame) before doing anything else.
+ *
+ * @retval 0                success, a frame was returned
+ * @retval AVERROR(EAGAIN)  output is not available in this state - user must
+ *                          try to send new input
+ * @retval AVERROR_EOF      the codec has been fully flushed, and there will be
+ *                          no more output frames
+ * @retval AVERROR(EINVAL)  codec not opened, or it is an encoder without the
+ *                          @ref AV_CODEC_FLAG_RECON_FRAME flag enabled
+ * @retval "other negative error code" legitimate decoding errors
+ */
+int avcodec_receive_frame(AVCodecContext* avctx, AVFrame* frame);
+
+/**
+ * Supply a raw video or audio frame to the encoder. Use
+ * avcodec_receive_packet() to retrieve buffered output packets.
+ *
+ * @param avctx     codec context
+ * @param[in] frame AVFrame containing the raw audio or video frame to be
+ * encoded. Ownership of the frame remains with the caller, and the encoder will
+ * not write to the frame. The encoder may create a reference to the frame data
+ * (or copy it if the frame is not reference-counted). It can be NULL, in which
+ * case it is considered a flush packet.  This signals the end of the stream. If
+ * the encoder still has packets buffered, it will return them after this call.
+ * Once flushing mode has been entered, additional flush packets are ignored,
+ * and sending frames will return AVERROR_EOF.
+ *
+ *                  For audio:
+ *                  If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
+ *                  can have any number of samples.
+ *                  If it is not set, frame->nb_samples must be equal to
+ *                  avctx->frame_size for all frames except the last.
+ *                  The final frame may be smaller than avctx->frame_size.
+ * @retval 0                 success
+ * @retval AVERROR(EAGAIN)   input is not accepted in the current state - user
+ * must read output with avcodec_receive_packet() (once all output is read, the
+ * packet should be resent, and the call will not fail with EAGAIN).
+ * @retval AVERROR_EOF       the encoder has been flushed, and no new frames can
+ *                           be sent to it
+ * @retval AVERROR(EINVAL)   codec not opened, it is a decoder, or requires
+ * flush
+ * @retval AVERROR(ENOMEM)   failed to add packet to internal queue, or similar
+ * @retval "another negative error code" legitimate encoding errors
+ */
+int avcodec_send_frame(AVCodecContext* avctx, const AVFrame* frame);
+
+/**
+ * Read encoded data from the encoder.
+ *
+ * @param avctx codec context
+ * @param avpkt This will be set to a reference-counted packet allocated by the
+ *              encoder. Note that the function will always call
+ *              av_packet_unref(avpkt) before doing anything else.
+ * @retval 0               success
+ * @retval AVERROR(EAGAIN) output is not available in the current state - user
+ * must try to send input
+ * @retval AVERROR_EOF     the encoder has been fully flushed, and there will be
+ * no more output packets
+ * @retval AVERROR(EINVAL) codec not opened, or it is a decoder
+ * @retval "another negative error code" legitimate encoding errors
+ */
+int avcodec_receive_packet(AVCodecContext* avctx, AVPacket* avpkt);
+
+/**
+ * Create and return a AVHWFramesContext with values adequate for hardware
+ * decoding. This is meant to get called from the get_format callback, and is
+ * a helper for preparing a AVHWFramesContext for AVCodecContext.hw_frames_ctx.
+ * This API is for decoding with certain hardware acceleration modes/APIs only.
+ *
+ * The returned AVHWFramesContext is not initialized. The caller must do this
+ * with av_hwframe_ctx_init().
+ *
+ * Calling this function is not a requirement, but makes it simpler to avoid
+ * codec or hardware API specific details when manually allocating frames.
+ *
+ * Alternatively to this, an API user can set AVCodecContext.hw_device_ctx,
+ * which sets up AVCodecContext.hw_frames_ctx fully automatically, and makes
+ * it unnecessary to call this function or having to care about
+ * AVHWFramesContext initialization at all.
+ *
+ * There are a number of requirements for calling this function:
+ *
+ * - It must be called from get_format with the same avctx parameter that was
+ *   passed to get_format. Calling it outside of get_format is not allowed, and
+ *   can trigger undefined behavior.
+ * - The function is not always supported (see description of return values).
+ *   Even if this function returns successfully, hwaccel initialization could
+ *   fail later. (The degree to which implementations check whether the stream
+ *   is actually supported varies. Some do this check only after the user's
+ *   get_format callback returns.)
+ * - The hw_pix_fmt must be one of the choices suggested by get_format. If the
+ *   user decides to use a AVHWFramesContext prepared with this API function,
+ *   the user must return the same hw_pix_fmt from get_format.
+ * - The device_ref passed to this function must support the given hw_pix_fmt.
+ * - After calling this API function, it is the user's responsibility to
+ *   initialize the AVHWFramesContext (returned by the out_frames_ref
+ * parameter), and to set AVCodecContext.hw_frames_ctx to it. If done, this must
+ * be done before returning from get_format (this is implied by the normal
+ *   AVCodecContext.hw_frames_ctx API rules).
+ * - The AVHWFramesContext parameters may change every time time get_format is
+ *   called. Also, AVCodecContext.hw_frames_ctx is reset before get_format. So
+ *   you are inherently required to go through this process again on every
+ *   get_format call.
+ * - It is perfectly possible to call this function without actually using
+ *   the resulting AVHWFramesContext. One use-case might be trying to reuse a
+ *   previously initialized AVHWFramesContext, and calling this API function
+ *   only to test whether the required frame parameters have changed.
+ * - Fields that use dynamically allocated values of any kind must not be set
+ *   by the user unless setting them is explicitly allowed by the documentation.
+ *   If the user sets AVHWFramesContext.free and AVHWFramesContext.user_opaque,
+ *   the new free callback must call the potentially set previous free callback.
+ *   This API call may set any dynamically allocated fields, including the free
+ *   callback.
+ *
+ * The function will set at least the following fields on AVHWFramesContext
+ * (potentially more, depending on hwaccel API):
+ *
+ * - All fields set by av_hwframe_ctx_alloc().
+ * - Set the format field to hw_pix_fmt.
+ * - Set the sw_format field to the most suited and most versatile format. (An
+ *   implication is that this will prefer generic formats over opaque formats
+ *   with arbitrary restrictions, if possible.)
+ * - Set the width/height fields to the coded frame size, rounded up to the
+ *   API-specific minimum alignment.
+ * - Only _if_ the hwaccel requires a pre-allocated pool: set the
+ * initial_pool_size field to the number of maximum reference surfaces possible
+ * with the codec, plus 1 surface for the user to work (meaning the user can
+ * safely reference at most 1 decoded surface at a time), plus additional
+ * buffering introduced by frame threading. If the hwaccel does not require
+ * pre-allocation, the field is left to 0, and the decoder will allocate new
+ * surfaces on demand during decoding.
+ * - Possibly AVHWFramesContext.hwctx fields, depending on the underlying
+ *   hardware API.
+ *
+ * Essentially, out_frames_ref returns the same as av_hwframe_ctx_alloc(), but
+ * with basic frame parameters set.
+ *
+ * The function is stateless, and does not change the AVCodecContext or the
+ * device_ref AVHWDeviceContext.
+ *
+ * @param avctx The context which is currently calling get_format, and which
+ *              implicitly contains all state needed for filling the returned
+ *              AVHWFramesContext properly.
+ * @param device_ref A reference to the AVHWDeviceContext describing the device
+ *                   which will be used by the hardware decoder.
+ * @param hw_pix_fmt The hwaccel format you are going to return from get_format.
+ * @param out_frames_ref On success, set to a reference to an _uninitialized_
+ *                       AVHWFramesContext, created from the given device_ref.
+ *                       Fields will be set to values required for decoding.
+ *                       Not changed if an error is returned.
+ * @return zero on success, a negative value on error. The following error codes
+ *         have special semantics:
+ *      AVERROR(ENOENT): the decoder does not support this functionality. Setup
+ *                       is always manual, or it is a decoder which does not
+ *                       support setting AVCodecContext.hw_frames_ctx at all,
+ *                       or it is a software format.
+ *      AVERROR(EINVAL): it is known that hardware decoding is not supported for
+ *                       this configuration, or the device_ref is not supported
+ *                       for the hwaccel referenced by hw_pix_fmt.
+ */
+int avcodec_get_hw_frames_parameters(AVCodecContext* avctx,
+                                     AVBufferRef* device_ref,
+                                     enum AVPixelFormat hw_pix_fmt,
+                                     AVBufferRef** out_frames_ref);
+
+/**
+ * @defgroup lavc_parsing Frame parsing
+ * @{
+ */
+
+enum AVPictureStructure {
+  AV_PICTURE_STRUCTURE_UNKNOWN,       ///< unknown
+  AV_PICTURE_STRUCTURE_TOP_FIELD,     ///< coded as top field
+  AV_PICTURE_STRUCTURE_BOTTOM_FIELD,  ///< coded as bottom field
+  AV_PICTURE_STRUCTURE_FRAME,         ///< coded as frame
+};
+
+typedef struct AVCodecParserContext {
+  void* priv_data;
+  const struct AVCodecParser* parser;
+  int64_t frame_offset;      /* offset of the current frame */
+  int64_t cur_offset;        /* current offset
+                                (incremented by each av_parser_parse()) */
+  int64_t next_frame_offset; /* offset of the next frame */
+  /* video info */
+  int pict_type; /* XXX: Put it back in AVCodecContext. */
+  /**
+   * This field is used for proper frame duration computation in lavf.
+   * It signals, how much longer the frame duration of the current frame
+   * is compared to normal frame duration.
+   *
+   * frame_duration = (1 + repeat_pict) * time_base
+   *
+   * It is used by codecs like H.264 to display telecined material.
+   */
+  int repeat_pict; /* XXX: Put it back in AVCodecContext. */
+  int64_t pts;     /* pts of the current frame */
+  int64_t dts;     /* dts of the current frame */
+
+  /* private data */
+  int64_t last_pts;
+  int64_t last_dts;
+  int fetch_timestamp;
+
+#define AV_PARSER_PTS_NB 4
+  int cur_frame_start_index;
+  int64_t cur_frame_offset[AV_PARSER_PTS_NB];
+  int64_t cur_frame_pts[AV_PARSER_PTS_NB];
+  int64_t cur_frame_dts[AV_PARSER_PTS_NB];
+
+  int flags;
+#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
+#define PARSER_FLAG_ONCE 0x0002
+/// Set if the parser has a valid file offset
+#define PARSER_FLAG_FETCHED_OFFSET 0x0004
+#define PARSER_FLAG_USE_CODEC_TS 0x1000
+
+  int64_t offset;  ///< byte offset from starting packet start
+  int64_t cur_frame_end[AV_PARSER_PTS_NB];
+
+  /**
+   * Set by parser to 1 for key frames and 0 for non-key frames.
+   * It is initialized to -1, so if the parser doesn't set this flag,
+   * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
+   * will be used.
+   */
+  int key_frame;
+
+  // Timestamp generation support:
+  /**
+   * Synchronization point for start of timestamp generation.
+   *
+   * Set to >0 for sync point, 0 for no sync point and <0 for undefined
+   * (default).
+   *
+   * For example, this corresponds to presence of H.264 buffering period
+   * SEI message.
+   */
+  int dts_sync_point;
+
+  /**
+   * Offset of the current timestamp against last timestamp sync point in
+   * units of AVCodecContext.time_base.
+   *
+   * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
+   * contain a valid timestamp offset.
+   *
+   * Note that the timestamp of sync point has usually a nonzero
+   * dts_ref_dts_delta, which refers to the previous sync point. Offset of
+   * the next frame after timestamp sync point will be usually 1.
+   *
+   * For example, this corresponds to H.264 cpb_removal_delay.
+   */
+  int dts_ref_dts_delta;
+
+  /**
+   * Presentation delay of current frame in units of AVCodecContext.time_base.
+   *
+   * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
+   * contain valid non-negative timestamp delta (presentation time of a frame
+   * must not lie in the past).
+   *
+   * This delay represents the difference between decoding and presentation
+   * time of the frame.
+   *
+   * For example, this corresponds to H.264 dpb_output_delay.
+   */
+  int pts_dts_delta;
+
+  /**
+   * Position of the packet in file.
+   *
+   * Analogous to cur_frame_pts/dts
+   */
+  int64_t cur_frame_pos[AV_PARSER_PTS_NB];
+
+  /**
+   * Byte position of currently parsed frame in stream.
+   */
+  int64_t pos;
+
+  /**
+   * Previous frame byte position.
+   */
+  int64_t last_pos;
+
+  /**
+   * Duration of the current frame.
+   * For audio, this is in units of 1 / AVCodecContext.sample_rate.
+   * For all other types, this is in units of AVCodecContext.time_base.
+   */
+  int duration;
+
+  enum AVFieldOrder field_order;
+
+  /**
+   * Indicate whether a picture is coded as a frame, top field or bottom field.
+   *
+   * For example, H.264 field_pic_flag equal to 0 corresponds to
+   * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
+   * equal to 1 and bottom_field_flag equal to 0 corresponds to
+   * AV_PICTURE_STRUCTURE_TOP_FIELD.
+   */
+  enum AVPictureStructure picture_structure;
+
+  /**
+   * Picture number incremented in presentation or output order.
+   * This field may be reinitialized at the first picture of a new sequence.
+   *
+   * For example, this corresponds to H.264 PicOrderCnt.
+   */
+  int output_picture_number;
+
+  /**
+   * Dimensions of the decoded video intended for presentation.
+   */
+  int width;
+  int height;
+
+  /**
+   * Dimensions of the coded video.
+   */
+  int coded_width;
+  int coded_height;
+
+  /**
+   * The format of the coded data, corresponds to enum AVPixelFormat for video
+   * and for enum AVSampleFormat for audio.
+   *
+   * Note that a decoder can have considerable freedom in how exactly it
+   * decodes the data, so the format reported here might be different from the
+   * one returned by a decoder.
+   */
+  int format;
+} AVCodecParserContext;
+
+typedef struct AVCodecParser {
+  int codec_ids[7]; /* several codec IDs are permitted */
+  int priv_data_size;
+  int (*parser_init)(AVCodecParserContext* s);
+  /* This callback never returns an error, a negative value means that
+   * the frame start was in a previous packet. */
+  int (*parser_parse)(AVCodecParserContext* s, AVCodecContext* avctx,
+                      const uint8_t** poutbuf, int* poutbuf_size,
+                      const uint8_t* buf, int buf_size);
+  void (*parser_close)(AVCodecParserContext* s);
+  int (*split)(AVCodecContext* avctx, const uint8_t* buf, int buf_size);
+} AVCodecParser;
+
+/**
+ * Iterate over all registered codec parsers.
+ *
+ * @param opaque a pointer where libavcodec will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered codec parser or NULL when the iteration is
+ *         finished
+ */
+const AVCodecParser* av_parser_iterate(void** opaque);
+
+AVCodecParserContext* av_parser_init(int codec_id);
+
+/**
+ * Parse a packet.
+ *
+ * @param s             parser context.
+ * @param avctx         codec context.
+ * @param poutbuf       set to pointer to parsed buffer or NULL if not yet
+ finished.
+ * @param poutbuf_size  set to size of parsed buffer or zero if not yet
+ finished.
+ * @param buf           input buffer.
+ * @param buf_size      buffer size in bytes without the padding. I.e. the full
+ buffer size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE. To signal
+ EOF, this should be 0 (so that the last frame can be output).
+ * @param pts           input presentation timestamp.
+ * @param dts           input decoding timestamp.
+ * @param pos           input byte position in stream.
+ * @return the number of bytes of the input bitstream used.
+ *
+ * Example:
+ * @code
+ *   while(in_len){
+ *       len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
+ *                                        in_data, in_len,
+ *                                        pts, dts, pos);
+ *       in_data += len;
+ *       in_len  -= len;
+ *
+ *       if(size)
+ *          decode_frame(data, size);
+ *   }
+ * @endcode
+ */
+int av_parser_parse2(AVCodecParserContext* s, AVCodecContext* avctx,
+                     uint8_t** poutbuf, int* poutbuf_size, const uint8_t* buf,
+                     int buf_size, int64_t pts, int64_t dts, int64_t pos);
+
+void av_parser_close(AVCodecParserContext* s);
+
+/**
+ * @}
+ * @}
+ */
+
+/**
+ * @addtogroup lavc_encoding
+ * @{
+ */
+
+int avcodec_encode_subtitle(AVCodecContext* avctx, uint8_t* buf, int buf_size,
+                            const AVSubtitle* sub);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavc_misc Utility functions
+ * @ingroup libavc
+ *
+ * Miscellaneous utility functions related to both encoding and decoding
+ * (or neither).
+ * @{
+ */
+
+/**
+ * @defgroup lavc_misc_pixfmt Pixel formats
+ *
+ * Functions for working with pixel formats.
+ * @{
+ */
+
+/**
+ * Return a value representing the fourCC code associated to the
+ * pixel format pix_fmt, or 0 if no associated fourCC code can be
+ * found.
+ */
+unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
+
+/**
+ * Find the best pixel format to convert to given a certain source pixel
+ * format.  When converting from one pixel format to another, information loss
+ * may occur.  For example, when converting from RGB24 to GRAY, the color
+ * information will be lost. Similarly, other losses occur when converting from
+ * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches
+ * which of the given pixel formats should be used to suffer the least amount of
+ * loss. The pixel formats from which it chooses one, are determined by the
+ * pix_fmt_list parameter.
+ *
+ *
+ * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to
+ * choose from
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[out] loss_ptr Combination of flags informing you what kind of losses
+ * will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
+enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(
+    const enum AVPixelFormat* pix_fmt_list, enum AVPixelFormat src_pix_fmt,
+    int has_alpha, int* loss_ptr);
+
+enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext* s,
+                                              const enum AVPixelFormat* fmt);
+
+/**
+ * @}
+ */
+
+void avcodec_string(char* buf, int buf_size, AVCodecContext* enc, int encode);
+
+int avcodec_default_execute(AVCodecContext* c,
+                            int (*func)(AVCodecContext* c2, void* arg2),
+                            void* arg, int* ret, int count, int size);
+int avcodec_default_execute2(AVCodecContext* c,
+                             int (*func)(AVCodecContext* c2, void* arg2, int,
+                                         int),
+                             void* arg, int* ret, int count);
+// FIXME func typedef
+
+/**
+ * Fill AVFrame audio data and linesize pointers.
+ *
+ * The buffer buf must be a preallocated buffer with a size big enough
+ * to contain the specified samples amount. The filled AVFrame data
+ * pointers will point to this buffer.
+ *
+ * AVFrame extended_data channel pointers are allocated if necessary for
+ * planar audio.
+ *
+ * @param frame       the AVFrame
+ *                    frame->nb_samples must be set prior to calling the
+ *                    function. This function fills in frame->data,
+ *                    frame->extended_data, frame->linesize[0].
+ * @param nb_channels channel count
+ * @param sample_fmt  sample format
+ * @param buf         buffer to use for frame data
+ * @param buf_size    size of buffer
+ * @param align       plane size sample alignment (0 = default)
+ * @return            >=0 on success, negative error code on failure
+ * @todo return the size in bytes required to store the samples in
+ * case of success, at the next libavutil bump
+ */
+int avcodec_fill_audio_frame(AVFrame* frame, int nb_channels,
+                             enum AVSampleFormat sample_fmt, const uint8_t* buf,
+                             int buf_size, int align);
+
+/**
+ * Reset the internal codec state / flush internal buffers. Should be called
+ * e.g. when seeking or when switching to a different stream.
+ *
+ * @note for decoders, this function just releases any references the decoder
+ * might keep internally, but the caller's references remain valid.
+ *
+ * @note for encoders, this function will only do something if the encoder
+ * declares support for AV_CODEC_CAP_ENCODER_FLUSH. When called, the encoder
+ * will drain any remaining packets, and can then be re-used for a different
+ * stream (as opposed to sending a null frame which will leave the encoder
+ * in a permanent EOF state after draining). This can be desirable if the
+ * cost of tearing down and replacing the encoder instance is high.
+ */
+void avcodec_flush_buffers(AVCodecContext* avctx);
+
+/**
+ * Return audio frame duration.
+ *
+ * @param avctx        codec context
+ * @param frame_bytes  size of the frame, or 0 if unknown
+ * @return             frame duration, in samples, if known. 0 if not able to
+ *                     determine.
+ */
+int av_get_audio_frame_duration(AVCodecContext* avctx, int frame_bytes);
+
+/* memory */
+
+/**
+ * Same behaviour av_fast_malloc but the buffer has additional
+ * AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0.
+ *
+ * In addition the whole buffer will initially and after resizes
+ * be 0-initialized so that no uninitialized data will ever appear.
+ */
+void av_fast_padded_malloc(void* ptr, unsigned int* size, size_t min_size);
+
+/**
+ * Same behaviour av_fast_padded_malloc except that buffer will always
+ * be 0-initialized after call.
+ */
+void av_fast_padded_mallocz(void* ptr, unsigned int* size, size_t min_size);
+
+/**
+ * @return a positive value if s is open (i.e. avcodec_open2() was called on it
+ * with no corresponding avcodec_close()), 0 otherwise.
+ */
+int avcodec_is_open(AVCodecContext* s);
+
+/**
+ * @}
+ */
+
+#endif /* AVCODEC_AVCODEC_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avdct.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avdct.h
new file mode 100644
index 0000000000..9edf4c187e
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/avdct.h
@@ -0,0 +1,85 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AVDCT_H
+#define AVCODEC_AVDCT_H
+
+#include "libavutil/opt.h"
+
+/**
+ * AVDCT context.
+ * @note function pointers can be NULL if the specific features have been
+ *       disabled at build time.
+ */
+typedef struct AVDCT {
+  const AVClass* av_class;
+
+  void (*idct)(int16_t* block /* align 16 */);
+
+  /**
+   * IDCT input permutation.
+   * Several optimized IDCTs need a permutated input (relative to the
+   * normal order of the reference IDCT).
+   * This permutation must be performed before the idct_put/add.
+   * Note, normally this can be merged with the zigzag/alternate scan<br>
+   * An example to avoid confusion:
+   * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
+   * - (x -> reference DCT -> reference IDCT -> x)
+   * - (x -> reference DCT -> simple_mmx_perm = idct_permutation
+   *    -> simple_idct_mmx -> x)
+   * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant
+   *    -> simple_idct_mmx -> ...)
+   */
+  uint8_t idct_permutation[64];
+
+  void (*fdct)(int16_t* block /* align 16 */);
+
+  /**
+   * DCT algorithm.
+   * must use AVOptions to set this field.
+   */
+  int dct_algo;
+
+  /**
+   * IDCT algorithm.
+   * must use AVOptions to set this field.
+   */
+  int idct_algo;
+
+  void (*get_pixels)(int16_t* block /* align 16 */,
+                     const uint8_t* pixels /* align 8 */, ptrdiff_t line_size);
+
+  int bits_per_sample;
+
+  void (*get_pixels_unaligned)(int16_t* block /* align 16 */,
+                               const uint8_t* pixels, ptrdiff_t line_size);
+} AVDCT;
+
+/**
+ * Allocates a AVDCT context.
+ * This needs to be initialized with avcodec_dct_init() after optionally
+ * configuring it with AVOptions.
+ *
+ * To free it use av_free()
+ */
+AVDCT* avcodec_dct_alloc(void);
+int avcodec_dct_init(AVDCT*);
+
+const AVClass* avcodec_dct_get_class(void);
+
+#endif /* AVCODEC_AVDCT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/bsf.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/bsf.h
new file mode 100644
index 0000000000..044a0597bf
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/bsf.h
@@ -0,0 +1,335 @@
+/*
+ * Bitstream filters public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_BSF_H
+#define AVCODEC_BSF_H
+
+#include "libavutil/dict.h"
+#include "libavutil/log.h"
+#include "libavutil/rational.h"
+
+#include "codec_id.h"
+#include "codec_par.h"
+#include "packet.h"
+
+/**
+ * @defgroup lavc_bsf Bitstream filters
+ * @ingroup libavc
+ *
+ * Bitstream filters transform encoded media data without decoding it. This
+ * allows e.g. manipulating various header values. Bitstream filters operate on
+ * @ref AVPacket "AVPackets".
+ *
+ * The bitstream filtering API is centered around two structures:
+ * AVBitStreamFilter and AVBSFContext. The former represents a bitstream filter
+ * in abstract, the latter a specific filtering process. Obtain an
+ * AVBitStreamFilter using av_bsf_get_by_name() or av_bsf_iterate(), then pass
+ * it to av_bsf_alloc() to create an AVBSFContext. Fill in the user-settable
+ * AVBSFContext fields, as described in its documentation, then call
+ * av_bsf_init() to prepare the filter context for use.
+ *
+ * Submit packets for filtering using av_bsf_send_packet(), obtain filtered
+ * results with av_bsf_receive_packet(). When no more input packets will be
+ * sent, submit a NULL AVPacket to signal the end of the stream to the filter.
+ * av_bsf_receive_packet() will then return trailing packets, if any are
+ * produced by the filter.
+ *
+ * Finally, free the filter context with av_bsf_free().
+ * @{
+ */
+
+/**
+ * The bitstream filter state.
+ *
+ * This struct must be allocated with av_bsf_alloc() and freed with
+ * av_bsf_free().
+ *
+ * The fields in the struct will only be changed (by the caller or by the
+ * filter) as described in their documentation, and are to be considered
+ * immutable otherwise.
+ */
+typedef struct AVBSFContext {
+  /**
+   * A class for logging and AVOptions
+   */
+  const AVClass* av_class;
+
+  /**
+   * The bitstream filter this context is an instance of.
+   */
+  const struct AVBitStreamFilter* filter;
+
+  /**
+   * Opaque filter-specific private data. If filter->priv_class is non-NULL,
+   * this is an AVOptions-enabled struct.
+   */
+  void* priv_data;
+
+  /**
+   * Parameters of the input stream. This field is allocated in
+   * av_bsf_alloc(), it needs to be filled by the caller before
+   * av_bsf_init().
+   */
+  AVCodecParameters* par_in;
+
+  /**
+   * Parameters of the output stream. This field is allocated in
+   * av_bsf_alloc(), it is set by the filter in av_bsf_init().
+   */
+  AVCodecParameters* par_out;
+
+  /**
+   * The timebase used for the timestamps of the input packets. Set by the
+   * caller before av_bsf_init().
+   */
+  AVRational time_base_in;
+
+  /**
+   * The timebase used for the timestamps of the output packets. Set by the
+   * filter in av_bsf_init().
+   */
+  AVRational time_base_out;
+} AVBSFContext;
+
+typedef struct AVBitStreamFilter {
+  const char* name;
+
+  /**
+   * A list of codec ids supported by the filter, terminated by
+   * AV_CODEC_ID_NONE.
+   * May be NULL, in that case the bitstream filter works with any codec id.
+   */
+  const enum AVCodecID* codec_ids;
+
+  /**
+   * A class for the private data, used to declare bitstream filter private
+   * AVOptions. This field is NULL for bitstream filters that do not declare
+   * any options.
+   *
+   * If this field is non-NULL, the first member of the filter private data
+   * must be a pointer to AVClass, which will be set by libavcodec generic
+   * code to this class.
+   */
+  const AVClass* priv_class;
+} AVBitStreamFilter;
+
+/**
+ * @return a bitstream filter with the specified name or NULL if no such
+ *         bitstream filter exists.
+ */
+const AVBitStreamFilter* av_bsf_get_by_name(const char* name);
+
+/**
+ * Iterate over all registered bitstream filters.
+ *
+ * @param opaque a pointer where libavcodec will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered bitstream filter or NULL when the iteration is
+ *         finished
+ */
+const AVBitStreamFilter* av_bsf_iterate(void** opaque);
+
+/**
+ * Allocate a context for a given bitstream filter. The caller must fill in the
+ * context parameters as described in the documentation and then call
+ * av_bsf_init() before sending any data to the filter.
+ *
+ * @param filter the filter for which to allocate an instance.
+ * @param[out] ctx a pointer into which the pointer to the newly-allocated
+ * context will be written. It must be freed with av_bsf_free() after the
+ *                 filtering is done.
+ *
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_bsf_alloc(const AVBitStreamFilter* filter, AVBSFContext** ctx);
+
+/**
+ * Prepare the filter for use, after all the parameters and options have been
+ * set.
+ *
+ * @param ctx a AVBSFContext previously allocated with av_bsf_alloc()
+ */
+int av_bsf_init(AVBSFContext* ctx);
+
+/**
+ * Submit a packet for filtering.
+ *
+ * After sending each packet, the filter must be completely drained by calling
+ * av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or
+ * AVERROR_EOF.
+ *
+ * @param ctx an initialized AVBSFContext
+ * @param pkt the packet to filter. The bitstream filter will take ownership of
+ * the packet and reset the contents of pkt. pkt is not touched if an error
+ * occurs. If pkt is empty (i.e. NULL, or pkt->data is NULL and
+ * pkt->side_data_elems zero), it signals the end of the stream (i.e. no more
+ * non-empty packets will be sent; sending more empty packets does nothing) and
+ * will cause the filter to output any packets it may have buffered internally.
+ *
+ * @return
+ *  - 0 on success.
+ *  - AVERROR(EAGAIN) if packets need to be retrieved from the filter (using
+ *    av_bsf_receive_packet()) before new input can be consumed.
+ *  - Another negative AVERROR value if an error occurs.
+ */
+int av_bsf_send_packet(AVBSFContext* ctx, AVPacket* pkt);
+
+/**
+ * Retrieve a filtered packet.
+ *
+ * @param ctx an initialized AVBSFContext
+ * @param[out] pkt this struct will be filled with the contents of the filtered
+ *                 packet. It is owned by the caller and must be freed using
+ *                 av_packet_unref() when it is no longer needed.
+ *                 This parameter should be "clean" (i.e. freshly allocated
+ *                 with av_packet_alloc() or unreffed with av_packet_unref())
+ *                 when this function is called. If this function returns
+ *                 successfully, the contents of pkt will be completely
+ *                 overwritten by the returned data. On failure, pkt is not
+ *                 touched.
+ *
+ * @return
+ *  - 0 on success.
+ *  - AVERROR(EAGAIN) if more packets need to be sent to the filter (using
+ *    av_bsf_send_packet()) to get more output.
+ *  - AVERROR_EOF if there will be no further output from the filter.
+ *  - Another negative AVERROR value if an error occurs.
+ *
+ * @note one input packet may result in several output packets, so after sending
+ * a packet with av_bsf_send_packet(), this function needs to be called
+ * repeatedly until it stops returning 0. It is also possible for a filter to
+ * output fewer packets than were sent to it, so this function may return
+ * AVERROR(EAGAIN) immediately after a successful av_bsf_send_packet() call.
+ */
+int av_bsf_receive_packet(AVBSFContext* ctx, AVPacket* pkt);
+
+/**
+ * Reset the internal bitstream filter state. Should be called e.g. when
+ * seeking.
+ */
+void av_bsf_flush(AVBSFContext* ctx);
+
+/**
+ * Free a bitstream filter context and everything associated with it; write NULL
+ * into the supplied pointer.
+ */
+void av_bsf_free(AVBSFContext** ctx);
+
+/**
+ * Get the AVClass for AVBSFContext. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass* av_bsf_get_class(void);
+
+/**
+ * Structure for chain/list of bitstream filters.
+ * Empty list can be allocated by av_bsf_list_alloc().
+ */
+typedef struct AVBSFList AVBSFList;
+
+/**
+ * Allocate empty list of bitstream filters.
+ * The list must be later freed by av_bsf_list_free()
+ * or finalized by av_bsf_list_finalize().
+ *
+ * @return Pointer to @ref AVBSFList on success, NULL in case of failure
+ */
+AVBSFList* av_bsf_list_alloc(void);
+
+/**
+ * Free list of bitstream filters.
+ *
+ * @param lst Pointer to pointer returned by av_bsf_list_alloc()
+ */
+void av_bsf_list_free(AVBSFList** lst);
+
+/**
+ * Append bitstream filter to the list of bitstream filters.
+ *
+ * @param lst List to append to
+ * @param bsf Filter context to be appended
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_append(AVBSFList* lst, AVBSFContext* bsf);
+
+/**
+ * Construct new bitstream filter context given it's name and options
+ * and append it to the list of bitstream filters.
+ *
+ * @param lst      List to append to
+ * @param bsf_name Name of the bitstream filter
+ * @param options  Options for the bitstream filter, can be set to NULL
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_append2(AVBSFList* lst, const char* bsf_name,
+                        AVDictionary** options);
+/**
+ * Finalize list of bitstream filters.
+ *
+ * This function will transform @ref AVBSFList to single @ref AVBSFContext,
+ * so the whole chain of bitstream filters can be treated as single filter
+ * freshly allocated by av_bsf_alloc().
+ * If the call is successful, @ref AVBSFList structure is freed and lst
+ * will be set to NULL. In case of failure, caller is responsible for
+ * freeing the structure by av_bsf_list_free()
+ *
+ * @param      lst Filter list structure to be transformed
+ * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext
+ * structure representing the chain of bitstream filters
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_finalize(AVBSFList** lst, AVBSFContext** bsf);
+
+/**
+ * Parse string describing list of bitstream filters and create single
+ * @ref AVBSFContext describing the whole chain of bitstream filters.
+ * Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext
+ * freshly allocated by av_bsf_alloc().
+ *
+ * @param      str String describing chain of bitstream filters in format
+ *                 `bsf1[=opt1=val1:opt2=val2][,bsf2]`
+ * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext
+ * structure representing the chain of bitstream filters
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_parse_str(const char* str, AVBSFContext** bsf);
+
+/**
+ * Get null/pass-through bitstream filter.
+ *
+ * @param[out] bsf Pointer to be set to new instance of pass-through bitstream
+ * filter
+ *
+ * @return
+ */
+int av_bsf_get_null_filter(AVBSFContext** bsf);
+
+/**
+ * @}
+ */
+
+#endif  // AVCODEC_BSF_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec.h
new file mode 100644
index 0000000000..7163d91d96
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec.h
@@ -0,0 +1,382 @@
+/*
+ * AVCodec public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CODEC_H
+#define AVCODEC_CODEC_H
+
+#include <stdint.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/log.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/rational.h"
+#include "libavutil/samplefmt.h"
+
+#include "libavcodec/codec_id.h"
+#include "libavcodec/version_major.h"
+
+/**
+ * @addtogroup lavc_core
+ * @{
+ */
+
+/**
+ * Decoder can use draw_horiz_band callback.
+ */
+#define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0)
+/**
+ * Codec uses get_buffer() or get_encode_buffer() for allocating buffers and
+ * supports custom allocators.
+ * If not set, it might not use get_buffer() or get_encode_buffer() at all, or
+ * use operations that assume the buffer was allocated by
+ * avcodec_default_get_buffer2 or avcodec_default_get_encode_buffer.
+ */
+#define AV_CODEC_CAP_DR1 (1 << 1)
+/**
+ * Encoder or decoder requires flushing with NULL input at the end in order to
+ * give the complete and correct output.
+ *
+ * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
+ *       with NULL data. The user can still send NULL data to the public encode
+ *       or decode function, but libavcodec will not pass it along to the codec
+ *       unless this flag is set.
+ *
+ * Decoders:
+ * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
+ * avpkt->size=0 at the end to get the delayed data until the decoder no longer
+ * returns frames.
+ *
+ * Encoders:
+ * The encoder needs to be fed with NULL data at the end of encoding until the
+ * encoder no longer returns data.
+ *
+ * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
+ *       flag also means that the encoder must set the pts and duration for
+ *       each output packet. If this flag is not set, the pts and duration will
+ *       be determined by libavcodec from the input frame.
+ */
+#define AV_CODEC_CAP_DELAY (1 << 5)
+/**
+ * Codec can be fed a final frame with a smaller size.
+ * This can be used to prevent truncation of the last audio samples.
+ */
+#define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6)
+
+#if FF_API_SUBFRAMES
+/**
+ * Codec can output multiple frames per AVPacket
+ * Normally demuxers return one frame at a time, demuxers which do not do
+ * are connected to a parser to split what they return into proper frames.
+ * This flag is reserved to the very rare category of codecs which have a
+ * bitstream that cannot be split into frames without timeconsuming
+ * operations like full decoding. Demuxers carrying such bitstreams thus
+ * may return multiple frames in a packet. This has many disadvantages like
+ * prohibiting stream copy in many cases thus it should only be considered
+ * as a last resort.
+ */
+#  define AV_CODEC_CAP_SUBFRAMES (1 << 8)
+#endif
+
+/**
+ * Codec is experimental and is thus avoided in favor of non experimental
+ * encoders
+ */
+#define AV_CODEC_CAP_EXPERIMENTAL (1 << 9)
+/**
+ * Codec should fill in channel configuration and samplerate instead of
+ * container
+ */
+#define AV_CODEC_CAP_CHANNEL_CONF (1 << 10)
+/**
+ * Codec supports frame-level multithreading.
+ */
+#define AV_CODEC_CAP_FRAME_THREADS (1 << 12)
+/**
+ * Codec supports slice-based (or partition-based) multithreading.
+ */
+#define AV_CODEC_CAP_SLICE_THREADS (1 << 13)
+/**
+ * Codec supports changed parameters at any point.
+ */
+#define AV_CODEC_CAP_PARAM_CHANGE (1 << 14)
+/**
+ * Codec supports multithreading through a method other than slice- or
+ * frame-level multithreading. Typically this marks wrappers around
+ * multithreading-capable external libraries.
+ */
+#define AV_CODEC_CAP_OTHER_THREADS (1 << 15)
+/**
+ * Audio encoder supports receiving a different number of samples in each call.
+ */
+#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
+/**
+ * Decoder is not a preferred choice for probing.
+ * This indicates that the decoder is not a good choice for probing.
+ * It could for example be an expensive to spin up hardware decoder,
+ * or it could simply not provide a lot of useful information about
+ * the stream.
+ * A decoder marked with this flag should only be used as last resort
+ * choice for probing.
+ */
+#define AV_CODEC_CAP_AVOID_PROBING (1 << 17)
+
+/**
+ * Codec is backed by a hardware implementation. Typically used to
+ * identify a non-hwaccel hardware decoder. For information about hwaccels, use
+ * avcodec_get_hw_config() instead.
+ */
+#define AV_CODEC_CAP_HARDWARE (1 << 18)
+
+/**
+ * Codec is potentially backed by a hardware implementation, but not
+ * necessarily. This is used instead of AV_CODEC_CAP_HARDWARE, if the
+ * implementation provides some sort of internal fallback.
+ */
+#define AV_CODEC_CAP_HYBRID (1 << 19)
+
+/**
+ * This encoder can reorder user opaque values from input AVFrames and return
+ * them with corresponding output packets.
+ * @see AV_CODEC_FLAG_COPY_OPAQUE
+ */
+#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 20)
+
+/**
+ * This encoder can be flushed using avcodec_flush_buffers(). If this flag is
+ * not set, the encoder must be closed and reopened to ensure that no frames
+ * remain pending.
+ */
+#define AV_CODEC_CAP_ENCODER_FLUSH (1 << 21)
+
+/**
+ * The encoder is able to output reconstructed frame data, i.e. raw frames that
+ * would be produced by decoding the encoded bitstream.
+ *
+ * Reconstructed frame output is enabled by the AV_CODEC_FLAG_RECON_FRAME flag.
+ */
+#define AV_CODEC_CAP_ENCODER_RECON_FRAME (1 << 22)
+
+/**
+ * AVProfile.
+ */
+typedef struct AVProfile {
+  int profile;
+  const char* name;  ///< short name for the profile
+} AVProfile;
+
+/**
+ * AVCodec.
+ */
+typedef struct AVCodec {
+  /**
+   * Name of the codec implementation.
+   * The name is globally unique among encoders and among decoders (but an
+   * encoder and a decoder can share the same name).
+   * This is the primary way to find a codec from the user perspective.
+   */
+  const char* name;
+  /**
+   * Descriptive name for the codec, meant to be more human readable than name.
+   * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
+   */
+  const char* long_name;
+  enum AVMediaType type;
+  enum AVCodecID id;
+  /**
+   * Codec capabilities.
+   * see AV_CODEC_CAP_*
+   */
+  int capabilities;
+  uint8_t max_lowres;  ///< maximum value for lowres supported by the decoder
+  const AVRational*
+      supported_framerates;  ///< array of supported framerates, or NULL if any,
+                             ///< array is terminated by {0,0}
+  const enum AVPixelFormat*
+      pix_fmts;  ///< array of supported pixel formats, or NULL if unknown,
+                 ///< array is terminated by -1
+  const int*
+      supported_samplerates;  ///< array of supported audio samplerates, or NULL
+                              ///< if unknown, array is terminated by 0
+  const enum AVSampleFormat*
+      sample_fmts;  ///< array of supported sample formats, or NULL if unknown,
+                    ///< array is terminated by -1
+  const AVClass* priv_class;  ///< AVClass for the private context
+  const AVProfile*
+      profiles;  ///< array of recognized profiles, or NULL if unknown, array is
+                 ///< terminated by {AV_PROFILE_UNKNOWN}
+
+  /**
+   * Group name of the codec implementation.
+   * This is a short symbolic name of the wrapper backing this codec. A
+   * wrapper uses some kind of external implementation for the codec, such
+   * as an external library, or a codec implementation provided by the OS or
+   * the hardware.
+   * If this field is NULL, this is a builtin, libavcodec native codec.
+   * If non-NULL, this will be the suffix in AVCodec.name in most cases
+   * (usually AVCodec.name will be of the form "<codec_name>_<wrapper_name>").
+   */
+  const char* wrapper_name;
+
+  /**
+   * Array of supported channel layouts, terminated with a zeroed layout.
+   */
+  const AVChannelLayout* ch_layouts;
+} AVCodec;
+
+/**
+ * Iterate over all registered codecs.
+ *
+ * @param opaque a pointer where libavcodec will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered codec or NULL when the iteration is
+ *         finished
+ */
+const AVCodec* av_codec_iterate(void** opaque);
+
+/**
+ * Find a registered decoder with a matching codec ID.
+ *
+ * @param id AVCodecID of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+const AVCodec* avcodec_find_decoder(enum AVCodecID id);
+
+/**
+ * Find a registered decoder with the specified name.
+ *
+ * @param name name of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
+ */
+const AVCodec* avcodec_find_decoder_by_name(const char* name);
+
+/**
+ * Find a registered encoder with a matching codec ID.
+ *
+ * @param id AVCodecID of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+const AVCodec* avcodec_find_encoder(enum AVCodecID id);
+
+/**
+ * Find a registered encoder with the specified name.
+ *
+ * @param name name of the requested encoder
+ * @return An encoder if one was found, NULL otherwise.
+ */
+const AVCodec* avcodec_find_encoder_by_name(const char* name);
+/**
+ * @return a non-zero number if codec is an encoder, zero otherwise
+ */
+int av_codec_is_encoder(const AVCodec* codec);
+
+/**
+ * @return a non-zero number if codec is a decoder, zero otherwise
+ */
+int av_codec_is_decoder(const AVCodec* codec);
+
+/**
+ * Return a name for the specified profile, if available.
+ *
+ * @param codec the codec that is searched for the given profile
+ * @param profile the profile value for which a name is requested
+ * @return A name for the profile if found, NULL otherwise.
+ */
+const char* av_get_profile_name(const AVCodec* codec, int profile);
+
+enum {
+  /**
+   * The codec supports this format via the hw_device_ctx interface.
+   *
+   * When selecting this format, AVCodecContext.hw_device_ctx should
+   * have been set to a device of the specified type before calling
+   * avcodec_open2().
+   */
+  AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX = 0x01,
+  /**
+   * The codec supports this format via the hw_frames_ctx interface.
+   *
+   * When selecting this format for a decoder,
+   * AVCodecContext.hw_frames_ctx should be set to a suitable frames
+   * context inside the get_format() callback.  The frames context
+   * must have been created on a device of the specified type.
+   *
+   * When selecting this format for an encoder,
+   * AVCodecContext.hw_frames_ctx should be set to the context which
+   * will be used for the input frames before calling avcodec_open2().
+   */
+  AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX = 0x02,
+  /**
+   * The codec supports this format by some internal method.
+   *
+   * This format can be selected without any additional configuration -
+   * no device or frames context is required.
+   */
+  AV_CODEC_HW_CONFIG_METHOD_INTERNAL = 0x04,
+  /**
+   * The codec supports this format by some ad-hoc method.
+   *
+   * Additional settings and/or function calls are required.  See the
+   * codec-specific documentation for details.  (Methods requiring
+   * this sort of configuration are deprecated and others should be
+   * used in preference.)
+   */
+  AV_CODEC_HW_CONFIG_METHOD_AD_HOC = 0x08,
+};
+
+typedef struct AVCodecHWConfig {
+  /**
+   * For decoders, a hardware pixel format which that decoder may be
+   * able to decode to if suitable hardware is available.
+   *
+   * For encoders, a pixel format which the encoder may be able to
+   * accept.  If set to AV_PIX_FMT_NONE, this applies to all pixel
+   * formats supported by the codec.
+   */
+  enum AVPixelFormat pix_fmt;
+  /**
+   * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
+   * setup methods which can be used with this configuration.
+   */
+  int methods;
+  /**
+   * The device type associated with the configuration.
+   *
+   * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
+   * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
+   */
+  enum AVHWDeviceType device_type;
+} AVCodecHWConfig;
+
+/**
+ * Retrieve supported hardware configurations for a codec.
+ *
+ * Values of index from zero to some maximum return the indexed configuration
+ * descriptor; all other values return NULL.  If the codec does not support
+ * any hardware configurations then it will always return NULL.
+ */
+const AVCodecHWConfig* avcodec_get_hw_config(const AVCodec* codec, int index);
+
+/**
+ * @}
+ */
+
+#endif /* AVCODEC_CODEC_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_desc.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_desc.h
new file mode 100644
index 0000000000..a8d424ea7d
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_desc.h
@@ -0,0 +1,134 @@
+/*
+ * Codec descriptors public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CODEC_DESC_H
+#define AVCODEC_CODEC_DESC_H
+
+#include "libavutil/avutil.h"
+
+#include "codec_id.h"
+
+/**
+ * @addtogroup lavc_core
+ * @{
+ */
+
+/**
+ * This struct describes the properties of a single codec described by an
+ * AVCodecID.
+ * @see avcodec_descriptor_get()
+ */
+typedef struct AVCodecDescriptor {
+  enum AVCodecID id;
+  enum AVMediaType type;
+  /**
+   * Name of the codec described by this descriptor. It is non-empty and
+   * unique for each codec descriptor. It should contain alphanumeric
+   * characters and '_' only.
+   */
+  const char* name;
+  /**
+   * A more descriptive name for this codec. May be NULL.
+   */
+  const char* long_name;
+  /**
+   * Codec properties, a combination of AV_CODEC_PROP_* flags.
+   */
+  int props;
+  /**
+   * MIME type(s) associated with the codec.
+   * May be NULL; if not, a NULL-terminated array of MIME types.
+   * The first item is always non-NULL and is the preferred MIME type.
+   */
+  const char* const* mime_types;
+  /**
+   * If non-NULL, an array of profiles recognized for this codec.
+   * Terminated with AV_PROFILE_UNKNOWN.
+   */
+  const struct AVProfile* profiles;
+} AVCodecDescriptor;
+
+/**
+ * Codec uses only intra compression.
+ * Video and audio codecs only.
+ */
+#define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
+/**
+ * Codec supports lossy compression. Audio and video codecs only.
+ * @note a codec may support both lossy and lossless
+ * compression modes
+ */
+#define AV_CODEC_PROP_LOSSY (1 << 1)
+/**
+ * Codec supports lossless compression. Audio and video codecs only.
+ */
+#define AV_CODEC_PROP_LOSSLESS (1 << 2)
+/**
+ * Codec supports frame reordering. That is, the coded order (the order in which
+ * the encoded packets are output by the encoders / stored / input to the
+ * decoders) may be different from the presentation order of the corresponding
+ * frames.
+ *
+ * For codecs that do not have this property set, PTS and DTS should always be
+ * equal.
+ */
+#define AV_CODEC_PROP_REORDER (1 << 3)
+
+/**
+ * Video codec supports separate coding of fields in interlaced frames.
+ */
+#define AV_CODEC_PROP_FIELDS (1 << 4)
+
+/**
+ * Subtitle codec is bitmap based
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
+ */
+#define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
+/**
+ * Subtitle codec is text based.
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
+ */
+#define AV_CODEC_PROP_TEXT_SUB (1 << 17)
+
+/**
+ * @return descriptor for given codec ID or NULL if no descriptor exists.
+ */
+const AVCodecDescriptor* avcodec_descriptor_get(enum AVCodecID id);
+
+/**
+ * Iterate over all codec descriptors known to libavcodec.
+ *
+ * @param prev previous descriptor. NULL to get the first descriptor.
+ *
+ * @return next descriptor or NULL after the last descriptor
+ */
+const AVCodecDescriptor* avcodec_descriptor_next(const AVCodecDescriptor* prev);
+
+/**
+ * @return codec descriptor with the given name or NULL if no such descriptor
+ *         exists.
+ */
+const AVCodecDescriptor* avcodec_descriptor_get_by_name(const char* name);
+
+/**
+ * @}
+ */
+
+#endif  // AVCODEC_CODEC_DESC_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_id.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_id.h
new file mode 100644
index 0000000000..edeb281ff4
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_id.h
@@ -0,0 +1,676 @@
+/*
+ * Codec IDs
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CODEC_ID_H
+#define AVCODEC_CODEC_ID_H
+
+#include "libavutil/avutil.h"
+#include "libavutil/samplefmt.h"
+
+#include "version_major.h"
+
+/**
+ * @addtogroup lavc_core
+ * @{
+ */
+
+/**
+ * Identify the syntax and semantics of the bitstream.
+ * The principle is roughly:
+ * Two decoders with the same ID can decode the same streams.
+ * Two encoders with the same ID can encode compatible streams.
+ * There may be slight deviations from the principle due to implementation
+ * details.
+ *
+ * If you add a codec ID to this list, add it so that
+ * 1. no value of an existing codec ID changes (that would break ABI),
+ * 2. it is as close as possible to similar codecs
+ *
+ * After adding new codec IDs, do not forget to add an entry to the codec
+ * descriptor list and bump libavcodec minor version.
+ */
+enum AVCodecID {
+  AV_CODEC_ID_NONE,
+
+  /* video codecs */
+  AV_CODEC_ID_MPEG1VIDEO,
+  AV_CODEC_ID_MPEG2VIDEO,  ///< preferred ID for MPEG-1/2 video decoding
+  AV_CODEC_ID_H261,
+  AV_CODEC_ID_H263,
+  AV_CODEC_ID_RV10,
+  AV_CODEC_ID_RV20,
+  AV_CODEC_ID_MJPEG,
+  AV_CODEC_ID_MJPEGB,
+  AV_CODEC_ID_LJPEG,
+  AV_CODEC_ID_SP5X,
+  AV_CODEC_ID_JPEGLS,
+  AV_CODEC_ID_MPEG4,
+  AV_CODEC_ID_RAWVIDEO,
+  AV_CODEC_ID_MSMPEG4V1,
+  AV_CODEC_ID_MSMPEG4V2,
+  AV_CODEC_ID_MSMPEG4V3,
+  AV_CODEC_ID_WMV1,
+  AV_CODEC_ID_WMV2,
+  AV_CODEC_ID_H263P,
+  AV_CODEC_ID_H263I,
+  AV_CODEC_ID_FLV1,
+  AV_CODEC_ID_SVQ1,
+  AV_CODEC_ID_SVQ3,
+  AV_CODEC_ID_DVVIDEO,
+  AV_CODEC_ID_HUFFYUV,
+  AV_CODEC_ID_CYUV,
+  AV_CODEC_ID_H264,
+  AV_CODEC_ID_INDEO3,
+  AV_CODEC_ID_VP3,
+  AV_CODEC_ID_THEORA,
+  AV_CODEC_ID_ASV1,
+  AV_CODEC_ID_ASV2,
+  AV_CODEC_ID_FFV1,
+  AV_CODEC_ID_4XM,
+  AV_CODEC_ID_VCR1,
+  AV_CODEC_ID_CLJR,
+  AV_CODEC_ID_MDEC,
+  AV_CODEC_ID_ROQ,
+  AV_CODEC_ID_INTERPLAY_VIDEO,
+  AV_CODEC_ID_XAN_WC3,
+  AV_CODEC_ID_XAN_WC4,
+  AV_CODEC_ID_RPZA,
+  AV_CODEC_ID_CINEPAK,
+  AV_CODEC_ID_WS_VQA,
+  AV_CODEC_ID_MSRLE,
+  AV_CODEC_ID_MSVIDEO1,
+  AV_CODEC_ID_IDCIN,
+  AV_CODEC_ID_8BPS,
+  AV_CODEC_ID_SMC,
+  AV_CODEC_ID_FLIC,
+  AV_CODEC_ID_TRUEMOTION1,
+  AV_CODEC_ID_VMDVIDEO,
+  AV_CODEC_ID_MSZH,
+  AV_CODEC_ID_ZLIB,
+  AV_CODEC_ID_QTRLE,
+  AV_CODEC_ID_TSCC,
+  AV_CODEC_ID_ULTI,
+  AV_CODEC_ID_QDRAW,
+  AV_CODEC_ID_VIXL,
+  AV_CODEC_ID_QPEG,
+  AV_CODEC_ID_PNG,
+  AV_CODEC_ID_PPM,
+  AV_CODEC_ID_PBM,
+  AV_CODEC_ID_PGM,
+  AV_CODEC_ID_PGMYUV,
+  AV_CODEC_ID_PAM,
+  AV_CODEC_ID_FFVHUFF,
+  AV_CODEC_ID_RV30,
+  AV_CODEC_ID_RV40,
+  AV_CODEC_ID_VC1,
+  AV_CODEC_ID_WMV3,
+  AV_CODEC_ID_LOCO,
+  AV_CODEC_ID_WNV1,
+  AV_CODEC_ID_AASC,
+  AV_CODEC_ID_INDEO2,
+  AV_CODEC_ID_FRAPS,
+  AV_CODEC_ID_TRUEMOTION2,
+  AV_CODEC_ID_BMP,
+  AV_CODEC_ID_CSCD,
+  AV_CODEC_ID_MMVIDEO,
+  AV_CODEC_ID_ZMBV,
+  AV_CODEC_ID_AVS,
+  AV_CODEC_ID_SMACKVIDEO,
+  AV_CODEC_ID_NUV,
+  AV_CODEC_ID_KMVC,
+  AV_CODEC_ID_FLASHSV,
+  AV_CODEC_ID_CAVS,
+  AV_CODEC_ID_JPEG2000,
+  AV_CODEC_ID_VMNC,
+  AV_CODEC_ID_VP5,
+  AV_CODEC_ID_VP6,
+  AV_CODEC_ID_VP6F,
+  AV_CODEC_ID_TARGA,
+  AV_CODEC_ID_DSICINVIDEO,
+  AV_CODEC_ID_TIERTEXSEQVIDEO,
+  AV_CODEC_ID_TIFF,
+  AV_CODEC_ID_GIF,
+  AV_CODEC_ID_DXA,
+  AV_CODEC_ID_DNXHD,
+  AV_CODEC_ID_THP,
+  AV_CODEC_ID_SGI,
+  AV_CODEC_ID_C93,
+  AV_CODEC_ID_BETHSOFTVID,
+  AV_CODEC_ID_PTX,
+  AV_CODEC_ID_TXD,
+  AV_CODEC_ID_VP6A,
+  AV_CODEC_ID_AMV,
+  AV_CODEC_ID_VB,
+  AV_CODEC_ID_PCX,
+  AV_CODEC_ID_SUNRAST,
+  AV_CODEC_ID_INDEO4,
+  AV_CODEC_ID_INDEO5,
+  AV_CODEC_ID_MIMIC,
+  AV_CODEC_ID_RL2,
+  AV_CODEC_ID_ESCAPE124,
+  AV_CODEC_ID_DIRAC,
+  AV_CODEC_ID_BFI,
+  AV_CODEC_ID_CMV,
+  AV_CODEC_ID_MOTIONPIXELS,
+  AV_CODEC_ID_TGV,
+  AV_CODEC_ID_TGQ,
+  AV_CODEC_ID_TQI,
+  AV_CODEC_ID_AURA,
+  AV_CODEC_ID_AURA2,
+  AV_CODEC_ID_V210X,
+  AV_CODEC_ID_TMV,
+  AV_CODEC_ID_V210,
+  AV_CODEC_ID_DPX,
+  AV_CODEC_ID_MAD,
+  AV_CODEC_ID_FRWU,
+  AV_CODEC_ID_FLASHSV2,
+  AV_CODEC_ID_CDGRAPHICS,
+  AV_CODEC_ID_R210,
+  AV_CODEC_ID_ANM,
+  AV_CODEC_ID_BINKVIDEO,
+  AV_CODEC_ID_IFF_ILBM,
+#define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM
+  AV_CODEC_ID_KGV1,
+  AV_CODEC_ID_YOP,
+  AV_CODEC_ID_VP8,
+  AV_CODEC_ID_PICTOR,
+  AV_CODEC_ID_ANSI,
+  AV_CODEC_ID_A64_MULTI,
+  AV_CODEC_ID_A64_MULTI5,
+  AV_CODEC_ID_R10K,
+  AV_CODEC_ID_MXPEG,
+  AV_CODEC_ID_LAGARITH,
+  AV_CODEC_ID_PRORES,
+  AV_CODEC_ID_JV,
+  AV_CODEC_ID_DFA,
+  AV_CODEC_ID_WMV3IMAGE,
+  AV_CODEC_ID_VC1IMAGE,
+  AV_CODEC_ID_UTVIDEO,
+  AV_CODEC_ID_BMV_VIDEO,
+  AV_CODEC_ID_VBLE,
+  AV_CODEC_ID_DXTORY,
+  AV_CODEC_ID_V410,
+  AV_CODEC_ID_XWD,
+  AV_CODEC_ID_CDXL,
+  AV_CODEC_ID_XBM,
+  AV_CODEC_ID_ZEROCODEC,
+  AV_CODEC_ID_MSS1,
+  AV_CODEC_ID_MSA1,
+  AV_CODEC_ID_TSCC2,
+  AV_CODEC_ID_MTS2,
+  AV_CODEC_ID_CLLC,
+  AV_CODEC_ID_MSS2,
+  AV_CODEC_ID_VP9,
+  AV_CODEC_ID_AIC,
+  AV_CODEC_ID_ESCAPE130,
+  AV_CODEC_ID_G2M,
+  AV_CODEC_ID_WEBP,
+  AV_CODEC_ID_HNM4_VIDEO,
+  AV_CODEC_ID_HEVC,
+#define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC
+  AV_CODEC_ID_FIC,
+  AV_CODEC_ID_ALIAS_PIX,
+  AV_CODEC_ID_BRENDER_PIX,
+  AV_CODEC_ID_PAF_VIDEO,
+  AV_CODEC_ID_EXR,
+  AV_CODEC_ID_VP7,
+  AV_CODEC_ID_SANM,
+  AV_CODEC_ID_SGIRLE,
+  AV_CODEC_ID_MVC1,
+  AV_CODEC_ID_MVC2,
+  AV_CODEC_ID_HQX,
+  AV_CODEC_ID_TDSC,
+  AV_CODEC_ID_HQ_HQA,
+  AV_CODEC_ID_HAP,
+  AV_CODEC_ID_DDS,
+  AV_CODEC_ID_DXV,
+  AV_CODEC_ID_SCREENPRESSO,
+  AV_CODEC_ID_RSCC,
+  AV_CODEC_ID_AVS2,
+  AV_CODEC_ID_PGX,
+  AV_CODEC_ID_AVS3,
+  AV_CODEC_ID_MSP2,
+  AV_CODEC_ID_VVC,
+#define AV_CODEC_ID_H266 AV_CODEC_ID_VVC
+  AV_CODEC_ID_Y41P,
+  AV_CODEC_ID_AVRP,
+  AV_CODEC_ID_012V,
+  AV_CODEC_ID_AVUI,
+  AV_CODEC_ID_TARGA_Y216,
+  AV_CODEC_ID_V308,
+  AV_CODEC_ID_V408,
+  AV_CODEC_ID_YUV4,
+  AV_CODEC_ID_AVRN,
+  AV_CODEC_ID_CPIA,
+  AV_CODEC_ID_XFACE,
+  AV_CODEC_ID_SNOW,
+  AV_CODEC_ID_SMVJPEG,
+  AV_CODEC_ID_APNG,
+  AV_CODEC_ID_DAALA,
+  AV_CODEC_ID_CFHD,
+  AV_CODEC_ID_TRUEMOTION2RT,
+  AV_CODEC_ID_M101,
+  AV_CODEC_ID_MAGICYUV,
+  AV_CODEC_ID_SHEERVIDEO,
+  AV_CODEC_ID_YLC,
+  AV_CODEC_ID_PSD,
+  AV_CODEC_ID_PIXLET,
+  AV_CODEC_ID_SPEEDHQ,
+  AV_CODEC_ID_FMVC,
+  AV_CODEC_ID_SCPR,
+  AV_CODEC_ID_CLEARVIDEO,
+  AV_CODEC_ID_XPM,
+  AV_CODEC_ID_AV1,
+  AV_CODEC_ID_BITPACKED,
+  AV_CODEC_ID_MSCC,
+  AV_CODEC_ID_SRGC,
+  AV_CODEC_ID_SVG,
+  AV_CODEC_ID_GDV,
+  AV_CODEC_ID_FITS,
+  AV_CODEC_ID_IMM4,
+  AV_CODEC_ID_PROSUMER,
+  AV_CODEC_ID_MWSC,
+  AV_CODEC_ID_WCMV,
+  AV_CODEC_ID_RASC,
+  AV_CODEC_ID_HYMT,
+  AV_CODEC_ID_ARBC,
+  AV_CODEC_ID_AGM,
+  AV_CODEC_ID_LSCR,
+  AV_CODEC_ID_VP4,
+  AV_CODEC_ID_IMM5,
+  AV_CODEC_ID_MVDV,
+  AV_CODEC_ID_MVHA,
+  AV_CODEC_ID_CDTOONS,
+  AV_CODEC_ID_MV30,
+  AV_CODEC_ID_NOTCHLC,
+  AV_CODEC_ID_PFM,
+  AV_CODEC_ID_MOBICLIP,
+  AV_CODEC_ID_PHOTOCD,
+  AV_CODEC_ID_IPU,
+  AV_CODEC_ID_ARGO,
+  AV_CODEC_ID_CRI,
+  AV_CODEC_ID_SIMBIOSIS_IMX,
+  AV_CODEC_ID_SGA_VIDEO,
+  AV_CODEC_ID_GEM,
+  AV_CODEC_ID_VBN,
+  AV_CODEC_ID_JPEGXL,
+  AV_CODEC_ID_QOI,
+  AV_CODEC_ID_PHM,
+  AV_CODEC_ID_RADIANCE_HDR,
+  AV_CODEC_ID_WBMP,
+  AV_CODEC_ID_MEDIA100,
+  AV_CODEC_ID_VQC,
+  AV_CODEC_ID_PDV,
+  AV_CODEC_ID_EVC,
+  AV_CODEC_ID_RTV1,
+  AV_CODEC_ID_VMIX,
+  AV_CODEC_ID_LEAD,
+
+  /* various PCM "codecs" */
+  AV_CODEC_ID_FIRST_AUDIO =
+      0x10000,  ///< A dummy id pointing at the start of audio codecs
+  AV_CODEC_ID_PCM_S16LE = 0x10000,
+  AV_CODEC_ID_PCM_S16BE,
+  AV_CODEC_ID_PCM_U16LE,
+  AV_CODEC_ID_PCM_U16BE,
+  AV_CODEC_ID_PCM_S8,
+  AV_CODEC_ID_PCM_U8,
+  AV_CODEC_ID_PCM_MULAW,
+  AV_CODEC_ID_PCM_ALAW,
+  AV_CODEC_ID_PCM_S32LE,
+  AV_CODEC_ID_PCM_S32BE,
+  AV_CODEC_ID_PCM_U32LE,
+  AV_CODEC_ID_PCM_U32BE,
+  AV_CODEC_ID_PCM_S24LE,
+  AV_CODEC_ID_PCM_S24BE,
+  AV_CODEC_ID_PCM_U24LE,
+  AV_CODEC_ID_PCM_U24BE,
+  AV_CODEC_ID_PCM_S24DAUD,
+  AV_CODEC_ID_PCM_ZORK,
+  AV_CODEC_ID_PCM_S16LE_PLANAR,
+  AV_CODEC_ID_PCM_DVD,
+  AV_CODEC_ID_PCM_F32BE,
+  AV_CODEC_ID_PCM_F32LE,
+  AV_CODEC_ID_PCM_F64BE,
+  AV_CODEC_ID_PCM_F64LE,
+  AV_CODEC_ID_PCM_BLURAY,
+  AV_CODEC_ID_PCM_LXF,
+  AV_CODEC_ID_S302M,
+  AV_CODEC_ID_PCM_S8_PLANAR,
+  AV_CODEC_ID_PCM_S24LE_PLANAR,
+  AV_CODEC_ID_PCM_S32LE_PLANAR,
+  AV_CODEC_ID_PCM_S16BE_PLANAR,
+  AV_CODEC_ID_PCM_S64LE,
+  AV_CODEC_ID_PCM_S64BE,
+  AV_CODEC_ID_PCM_F16LE,
+  AV_CODEC_ID_PCM_F24LE,
+  AV_CODEC_ID_PCM_VIDC,
+  AV_CODEC_ID_PCM_SGA,
+
+  /* various ADPCM codecs */
+  AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
+  AV_CODEC_ID_ADPCM_IMA_WAV,
+  AV_CODEC_ID_ADPCM_IMA_DK3,
+  AV_CODEC_ID_ADPCM_IMA_DK4,
+  AV_CODEC_ID_ADPCM_IMA_WS,
+  AV_CODEC_ID_ADPCM_IMA_SMJPEG,
+  AV_CODEC_ID_ADPCM_MS,
+  AV_CODEC_ID_ADPCM_4XM,
+  AV_CODEC_ID_ADPCM_XA,
+  AV_CODEC_ID_ADPCM_ADX,
+  AV_CODEC_ID_ADPCM_EA,
+  AV_CODEC_ID_ADPCM_G726,
+  AV_CODEC_ID_ADPCM_CT,
+  AV_CODEC_ID_ADPCM_SWF,
+  AV_CODEC_ID_ADPCM_YAMAHA,
+  AV_CODEC_ID_ADPCM_SBPRO_4,
+  AV_CODEC_ID_ADPCM_SBPRO_3,
+  AV_CODEC_ID_ADPCM_SBPRO_2,
+  AV_CODEC_ID_ADPCM_THP,
+  AV_CODEC_ID_ADPCM_IMA_AMV,
+  AV_CODEC_ID_ADPCM_EA_R1,
+  AV_CODEC_ID_ADPCM_EA_R3,
+  AV_CODEC_ID_ADPCM_EA_R2,
+  AV_CODEC_ID_ADPCM_IMA_EA_SEAD,
+  AV_CODEC_ID_ADPCM_IMA_EA_EACS,
+  AV_CODEC_ID_ADPCM_EA_XAS,
+  AV_CODEC_ID_ADPCM_EA_MAXIS_XA,
+  AV_CODEC_ID_ADPCM_IMA_ISS,
+  AV_CODEC_ID_ADPCM_G722,
+  AV_CODEC_ID_ADPCM_IMA_APC,
+  AV_CODEC_ID_ADPCM_VIMA,
+  AV_CODEC_ID_ADPCM_AFC,
+  AV_CODEC_ID_ADPCM_IMA_OKI,
+  AV_CODEC_ID_ADPCM_DTK,
+  AV_CODEC_ID_ADPCM_IMA_RAD,
+  AV_CODEC_ID_ADPCM_G726LE,
+  AV_CODEC_ID_ADPCM_THP_LE,
+  AV_CODEC_ID_ADPCM_PSX,
+  AV_CODEC_ID_ADPCM_AICA,
+  AV_CODEC_ID_ADPCM_IMA_DAT4,
+  AV_CODEC_ID_ADPCM_MTAF,
+  AV_CODEC_ID_ADPCM_AGM,
+  AV_CODEC_ID_ADPCM_ARGO,
+  AV_CODEC_ID_ADPCM_IMA_SSI,
+  AV_CODEC_ID_ADPCM_ZORK,
+  AV_CODEC_ID_ADPCM_IMA_APM,
+  AV_CODEC_ID_ADPCM_IMA_ALP,
+  AV_CODEC_ID_ADPCM_IMA_MTF,
+  AV_CODEC_ID_ADPCM_IMA_CUNNING,
+  AV_CODEC_ID_ADPCM_IMA_MOFLEX,
+  AV_CODEC_ID_ADPCM_IMA_ACORN,
+  AV_CODEC_ID_ADPCM_XMD,
+
+  /* AMR */
+  AV_CODEC_ID_AMR_NB = 0x12000,
+  AV_CODEC_ID_AMR_WB,
+
+  /* RealAudio codecs*/
+  AV_CODEC_ID_RA_144 = 0x13000,
+  AV_CODEC_ID_RA_288,
+
+  /* various DPCM codecs */
+  AV_CODEC_ID_ROQ_DPCM = 0x14000,
+  AV_CODEC_ID_INTERPLAY_DPCM,
+  AV_CODEC_ID_XAN_DPCM,
+  AV_CODEC_ID_SOL_DPCM,
+  AV_CODEC_ID_SDX2_DPCM,
+  AV_CODEC_ID_GREMLIN_DPCM,
+  AV_CODEC_ID_DERF_DPCM,
+  AV_CODEC_ID_WADY_DPCM,
+  AV_CODEC_ID_CBD2_DPCM,
+
+  /* audio codecs */
+  AV_CODEC_ID_MP2 = 0x15000,
+  AV_CODEC_ID_MP3,  ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
+  AV_CODEC_ID_AAC,
+  AV_CODEC_ID_AC3,
+  AV_CODEC_ID_DTS,
+  AV_CODEC_ID_VORBIS,
+  AV_CODEC_ID_DVAUDIO,
+  AV_CODEC_ID_WMAV1,
+  AV_CODEC_ID_WMAV2,
+  AV_CODEC_ID_MACE3,
+  AV_CODEC_ID_MACE6,
+  AV_CODEC_ID_VMDAUDIO,
+  AV_CODEC_ID_FLAC,
+  AV_CODEC_ID_MP3ADU,
+  AV_CODEC_ID_MP3ON4,
+  AV_CODEC_ID_SHORTEN,
+  AV_CODEC_ID_ALAC,
+  AV_CODEC_ID_WESTWOOD_SND1,
+  AV_CODEC_ID_GSM,  ///< as in Berlin toast format
+  AV_CODEC_ID_QDM2,
+  AV_CODEC_ID_COOK,
+  AV_CODEC_ID_TRUESPEECH,
+  AV_CODEC_ID_TTA,
+  AV_CODEC_ID_SMACKAUDIO,
+  AV_CODEC_ID_QCELP,
+  AV_CODEC_ID_WAVPACK,
+  AV_CODEC_ID_DSICINAUDIO,
+  AV_CODEC_ID_IMC,
+  AV_CODEC_ID_MUSEPACK7,
+  AV_CODEC_ID_MLP,
+  AV_CODEC_ID_GSM_MS, /* as found in WAV */
+  AV_CODEC_ID_ATRAC3,
+  AV_CODEC_ID_APE,
+  AV_CODEC_ID_NELLYMOSER,
+  AV_CODEC_ID_MUSEPACK8,
+  AV_CODEC_ID_SPEEX,
+  AV_CODEC_ID_WMAVOICE,
+  AV_CODEC_ID_WMAPRO,
+  AV_CODEC_ID_WMALOSSLESS,
+  AV_CODEC_ID_ATRAC3P,
+  AV_CODEC_ID_EAC3,
+  AV_CODEC_ID_SIPR,
+  AV_CODEC_ID_MP1,
+  AV_CODEC_ID_TWINVQ,
+  AV_CODEC_ID_TRUEHD,
+  AV_CODEC_ID_MP4ALS,
+  AV_CODEC_ID_ATRAC1,
+  AV_CODEC_ID_BINKAUDIO_RDFT,
+  AV_CODEC_ID_BINKAUDIO_DCT,
+  AV_CODEC_ID_AAC_LATM,
+  AV_CODEC_ID_QDMC,
+  AV_CODEC_ID_CELT,
+  AV_CODEC_ID_G723_1,
+  AV_CODEC_ID_G729,
+  AV_CODEC_ID_8SVX_EXP,
+  AV_CODEC_ID_8SVX_FIB,
+  AV_CODEC_ID_BMV_AUDIO,
+  AV_CODEC_ID_RALF,
+  AV_CODEC_ID_IAC,
+  AV_CODEC_ID_ILBC,
+  AV_CODEC_ID_OPUS,
+  AV_CODEC_ID_COMFORT_NOISE,
+  AV_CODEC_ID_TAK,
+  AV_CODEC_ID_METASOUND,
+  AV_CODEC_ID_PAF_AUDIO,
+  AV_CODEC_ID_ON2AVC,
+  AV_CODEC_ID_DSS_SP,
+  AV_CODEC_ID_CODEC2,
+  AV_CODEC_ID_FFWAVESYNTH,
+  AV_CODEC_ID_SONIC,
+  AV_CODEC_ID_SONIC_LS,
+  AV_CODEC_ID_EVRC,
+  AV_CODEC_ID_SMV,
+  AV_CODEC_ID_DSD_LSBF,
+  AV_CODEC_ID_DSD_MSBF,
+  AV_CODEC_ID_DSD_LSBF_PLANAR,
+  AV_CODEC_ID_DSD_MSBF_PLANAR,
+  AV_CODEC_ID_4GV,
+  AV_CODEC_ID_INTERPLAY_ACM,
+  AV_CODEC_ID_XMA1,
+  AV_CODEC_ID_XMA2,
+  AV_CODEC_ID_DST,
+  AV_CODEC_ID_ATRAC3AL,
+  AV_CODEC_ID_ATRAC3PAL,
+  AV_CODEC_ID_DOLBY_E,
+  AV_CODEC_ID_APTX,
+  AV_CODEC_ID_APTX_HD,
+  AV_CODEC_ID_SBC,
+  AV_CODEC_ID_ATRAC9,
+  AV_CODEC_ID_HCOM,
+  AV_CODEC_ID_ACELP_KELVIN,
+  AV_CODEC_ID_MPEGH_3D_AUDIO,
+  AV_CODEC_ID_SIREN,
+  AV_CODEC_ID_HCA,
+  AV_CODEC_ID_FASTAUDIO,
+  AV_CODEC_ID_MSNSIREN,
+  AV_CODEC_ID_DFPWM,
+  AV_CODEC_ID_BONK,
+  AV_CODEC_ID_MISC4,
+  AV_CODEC_ID_APAC,
+  AV_CODEC_ID_FTR,
+  AV_CODEC_ID_WAVARC,
+  AV_CODEC_ID_RKA,
+  AV_CODEC_ID_AC4,
+  AV_CODEC_ID_OSQ,
+  AV_CODEC_ID_QOA,
+  AV_CODEC_ID_LC3,
+
+  /* subtitle codecs */
+  AV_CODEC_ID_FIRST_SUBTITLE =
+      0x17000,  ///< A dummy ID pointing at the start of subtitle codecs.
+  AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
+  AV_CODEC_ID_DVB_SUBTITLE,
+  AV_CODEC_ID_TEXT,  ///< raw UTF-8 text
+  AV_CODEC_ID_XSUB,
+  AV_CODEC_ID_SSA,
+  AV_CODEC_ID_MOV_TEXT,
+  AV_CODEC_ID_HDMV_PGS_SUBTITLE,
+  AV_CODEC_ID_DVB_TELETEXT,
+  AV_CODEC_ID_SRT,
+  AV_CODEC_ID_MICRODVD,
+  AV_CODEC_ID_EIA_608,
+  AV_CODEC_ID_JACOSUB,
+  AV_CODEC_ID_SAMI,
+  AV_CODEC_ID_REALTEXT,
+  AV_CODEC_ID_STL,
+  AV_CODEC_ID_SUBVIEWER1,
+  AV_CODEC_ID_SUBVIEWER,
+  AV_CODEC_ID_SUBRIP,
+  AV_CODEC_ID_WEBVTT,
+  AV_CODEC_ID_MPL2,
+  AV_CODEC_ID_VPLAYER,
+  AV_CODEC_ID_PJS,
+  AV_CODEC_ID_ASS,
+  AV_CODEC_ID_HDMV_TEXT_SUBTITLE,
+  AV_CODEC_ID_TTML,
+  AV_CODEC_ID_ARIB_CAPTION,
+
+  /* other specific kind of codecs (generally used for attachments) */
+  AV_CODEC_ID_FIRST_UNKNOWN =
+      0x18000,  ///< A dummy ID pointing at the start of various fake codecs.
+  AV_CODEC_ID_TTF = 0x18000,
+
+  AV_CODEC_ID_SCTE_35,  ///< Contain timestamp estimated through PCR of program
+                        ///< stream.
+  AV_CODEC_ID_EPG,
+  AV_CODEC_ID_BINTEXT,
+  AV_CODEC_ID_XBIN,
+  AV_CODEC_ID_IDF,
+  AV_CODEC_ID_OTF,
+  AV_CODEC_ID_SMPTE_KLV,
+  AV_CODEC_ID_DVD_NAV,
+  AV_CODEC_ID_TIMED_ID3,
+  AV_CODEC_ID_BIN_DATA,
+  AV_CODEC_ID_SMPTE_2038,
+
+  AV_CODEC_ID_PROBE =
+      0x19000,  ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf
+                ///< should attempt to identify it
+
+  AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
+                                  * stream (only used by libavformat) */
+  AV_CODEC_ID_MPEG4SYSTEMS =
+      0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
+                * stream (only used by libavformat) */
+  AV_CODEC_ID_FFMETADATA = 0x21000,  ///< Dummy codec for streams containing
+                                     ///< only metadata information.
+  AV_CODEC_ID_WRAPPED_AVFRAME =
+      0x21001,  ///< Passthrough codec, AVFrames wrapped in AVPacket
+  /**
+   * Dummy null video codec, useful mainly for development and debugging.
+   * Null encoder/decoder discard all input and never return any output.
+   */
+  AV_CODEC_ID_VNULL,
+  /**
+   * Dummy null audio codec, useful mainly for development and debugging.
+   * Null encoder/decoder discard all input and never return any output.
+   */
+  AV_CODEC_ID_ANULL,
+};
+
+/**
+ * Get the type of the given codec.
+ */
+enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
+
+/**
+ * Get the name of a codec.
+ * @return  a static string identifying the codec; never NULL
+ */
+const char* avcodec_get_name(enum AVCodecID id);
+
+/**
+ * Return codec bits per sample.
+ *
+ * @param[in] codec_id the codec
+ * @return Number of bits per sample or zero if unknown for the given codec.
+ */
+int av_get_bits_per_sample(enum AVCodecID codec_id);
+
+/**
+ * Return codec bits per sample.
+ * Only return non-zero if the bits per sample is exactly correct, not an
+ * approximation.
+ *
+ * @param[in] codec_id the codec
+ * @return Number of bits per sample or zero if unknown for the given codec.
+ */
+int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
+
+/**
+ * Return a name for the specified profile, if available.
+ *
+ * @param codec_id the ID of the codec to which the requested profile belongs
+ * @param profile the profile value for which a name is requested
+ * @return A name for the profile if found, NULL otherwise.
+ *
+ * @note unlike av_get_profile_name(), which searches a list of profiles
+ *       supported by a specific decoder or encoder implementation, this
+ *       function searches the list of profiles from the AVCodecDescriptor
+ */
+const char* avcodec_profile_name(enum AVCodecID codec_id, int profile);
+
+/**
+ * Return the PCM codec associated with a sample format.
+ * @param be  endianness, 0 for little, 1 for big,
+ *            -1 (or anything else) for native
+ * @return  AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
+ */
+enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
+
+/**
+ * @}
+ */
+
+#endif  // AVCODEC_CODEC_ID_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_par.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_par.h
new file mode 100644
index 0000000000..a99b976bcb
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/codec_par.h
@@ -0,0 +1,250 @@
+/*
+ * Codec parameters public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_CODEC_PAR_H
+#define AVCODEC_CODEC_PAR_H
+
+#include <stdint.h>
+
+#include "libavutil/avutil.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/rational.h"
+#include "libavutil/pixfmt.h"
+
+#include "codec_id.h"
+#include "defs.h"
+#include "packet.h"
+
+/**
+ * @addtogroup lavc_core
+ * @{
+ */
+
+/**
+ * This struct describes the properties of an encoded stream.
+ *
+ * sizeof(AVCodecParameters) is not a part of the public ABI, this struct must
+ * be allocated with avcodec_parameters_alloc() and freed with
+ * avcodec_parameters_free().
+ */
+typedef struct AVCodecParameters {
+  /**
+   * General type of the encoded data.
+   */
+  enum AVMediaType codec_type;
+  /**
+   * Specific type of the encoded data (the codec used).
+   */
+  enum AVCodecID codec_id;
+  /**
+   * Additional information about the codec (corresponds to the AVI FOURCC).
+   */
+  uint32_t codec_tag;
+
+  /**
+   * Extra binary data needed for initializing the decoder, codec-dependent.
+   *
+   * Must be allocated with av_malloc() and will be freed by
+   * avcodec_parameters_free(). The allocated size of extradata must be at
+   * least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding
+   * bytes zeroed.
+   */
+  uint8_t* extradata;
+  /**
+   * Size of the extradata content in bytes.
+   */
+  int extradata_size;
+
+  /**
+   * Additional data associated with the entire stream.
+   *
+   * Should be allocated with av_packet_side_data_new() or
+   * av_packet_side_data_add(), and will be freed by avcodec_parameters_free().
+   */
+  AVPacketSideData* coded_side_data;
+
+  /**
+   * Amount of entries in @ref coded_side_data.
+   */
+  int nb_coded_side_data;
+
+  /**
+   * - video: the pixel format, the value corresponds to enum AVPixelFormat.
+   * - audio: the sample format, the value corresponds to enum AVSampleFormat.
+   */
+  int format;
+
+  /**
+   * The average bitrate of the encoded data (in bits per second).
+   */
+  int64_t bit_rate;
+
+  /**
+   * The number of bits per sample in the codedwords.
+   *
+   * This is basically the bitrate per sample. It is mandatory for a bunch of
+   * formats to actually decode them. It's the number of bits for one sample in
+   * the actual coded bitstream.
+   *
+   * This could be for example 4 for ADPCM
+   * For PCM formats this matches bits_per_raw_sample
+   * Can be 0
+   */
+  int bits_per_coded_sample;
+
+  /**
+   * This is the number of valid bits in each output sample. If the
+   * sample format has more bits, the least significant bits are additional
+   * padding bits, which are always 0. Use right shifts to reduce the sample
+   * to its actual size. For example, audio formats with 24 bit samples will
+   * have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32.
+   * To get the original sample use "(int32_t)sample >> 8"."
+   *
+   * For ADPCM this might be 12 or 16 or similar
+   * Can be 0
+   */
+  int bits_per_raw_sample;
+
+  /**
+   * Codec-specific bitstream restrictions that the stream conforms to.
+   */
+  int profile;
+  int level;
+
+  /**
+   * Video only. The dimensions of the video frame in pixels.
+   */
+  int width;
+  int height;
+
+  /**
+   * Video only. The aspect ratio (width / height) which a single pixel
+   * should have when displayed.
+   *
+   * When the aspect ratio is unknown / undefined, the numerator should be
+   * set to 0 (the denominator may have any value).
+   */
+  AVRational sample_aspect_ratio;
+
+  /**
+   * Video only. Number of frames per second, for streams with constant frame
+   * durations. Should be set to { 0, 1 } when some frames have differing
+   * durations or if the value is not known.
+   *
+   * @note This field correponds to values that are stored in codec-level
+   * headers and is typically overridden by container/transport-layer
+   * timestamps, when available. It should thus be used only as a last resort,
+   * when no higher-level timing information is available.
+   */
+  AVRational framerate;
+
+  /**
+   * Video only. The order of the fields in interlaced video.
+   */
+  enum AVFieldOrder field_order;
+
+  /**
+   * Video only. Additional colorspace characteristics.
+   */
+  enum AVColorRange color_range;
+  enum AVColorPrimaries color_primaries;
+  enum AVColorTransferCharacteristic color_trc;
+  enum AVColorSpace color_space;
+  enum AVChromaLocation chroma_location;
+
+  /**
+   * Video only. Number of delayed frames.
+   */
+  int video_delay;
+
+  /**
+   * Audio only. The channel layout and number of channels.
+   */
+  AVChannelLayout ch_layout;
+  /**
+   * Audio only. The number of audio samples per second.
+   */
+  int sample_rate;
+  /**
+   * Audio only. The number of bytes per coded audio frame, required by some
+   * formats.
+   *
+   * Corresponds to nBlockAlign in WAVEFORMATEX.
+   */
+  int block_align;
+  /**
+   * Audio only. Audio frame size, if known. Required by some formats to be
+   * static.
+   */
+  int frame_size;
+
+  /**
+   * Audio only. The amount of padding (in samples) inserted by the encoder at
+   * the beginning of the audio. I.e. this number of leading decoded samples
+   * must be discarded by the caller to get the original audio without leading
+   * padding.
+   */
+  int initial_padding;
+  /**
+   * Audio only. The amount of padding (in samples) appended by the encoder to
+   * the end of the audio. I.e. this number of decoded samples must be
+   * discarded by the caller from the end of the stream to get the original
+   * audio without any trailing padding.
+   */
+  int trailing_padding;
+  /**
+   * Audio only. Number of samples to skip after a discontinuity.
+   */
+  int seek_preroll;
+} AVCodecParameters;
+
+/**
+ * Allocate a new AVCodecParameters and set its fields to default values
+ * (unknown/invalid/0). The returned struct must be freed with
+ * avcodec_parameters_free().
+ */
+AVCodecParameters* avcodec_parameters_alloc(void);
+
+/**
+ * Free an AVCodecParameters instance and everything associated with it and
+ * write NULL to the supplied pointer.
+ */
+void avcodec_parameters_free(AVCodecParameters** par);
+
+/**
+ * Copy the contents of src to dst. Any allocated fields in dst are freed and
+ * replaced with newly allocated duplicates of the corresponding fields in src.
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure.
+ */
+int avcodec_parameters_copy(AVCodecParameters* dst,
+                            const AVCodecParameters* src);
+
+/**
+ * This function is the same as av_get_audio_frame_duration(), except it works
+ * with AVCodecParameters instead of an AVCodecContext.
+ */
+int av_get_audio_frame_duration2(AVCodecParameters* par, int frame_bytes);
+
+/**
+ * @}
+ */
+
+#endif  // AVCODEC_CODEC_PAR_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/defs.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/defs.h
new file mode 100644
index 0000000000..63df946e16
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/defs.h
@@ -0,0 +1,344 @@
+/*
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_DEFS_H
+#define AVCODEC_DEFS_H
+
+/**
+ * @file
+ * @ingroup libavc
+ * Misc types and constants that do not belong anywhere else.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+
+/**
+ * @ingroup lavc_decoding
+ * Required number of additionally allocated bytes at the end of the input
+ * bitstream for decoding. This is mainly needed because some optimized
+ * bitstream readers read 32 or 64 bit at once and could read over the end.<br>
+ * Note: If the first 23 bits of the additional bytes are not 0, then damaged
+ * MPEG bitstreams could cause overread and segfault.
+ */
+#define AV_INPUT_BUFFER_PADDING_SIZE 64
+
+/**
+ * Verify checksums embedded in the bitstream (could be of either encoded or
+ * decoded data, depending on the format) and print an error message on
+ * mismatch. If AV_EF_EXPLODE is also set, a mismatching checksum will result in
+ * the decoder/demuxer returning an error.
+ */
+#define AV_EF_CRCCHECK (1 << 0)
+#define AV_EF_BITSTREAM (1 << 1)  ///< detect bitstream specification deviations
+#define AV_EF_BUFFER (1 << 2)     ///< detect improper bitstream length
+#define AV_EF_EXPLODE (1 << 3)    ///< abort decoding on minor error detection
+
+#define AV_EF_IGNORE_ERR (1 << 15)  ///< ignore errors and continue
+#define AV_EF_CAREFUL \
+  (1 << 16)  ///< consider things that violate the spec, are fast to calculate
+             ///< and have not been seen in the wild as errors
+#define AV_EF_COMPLIANT \
+  (1 << 17)  ///< consider all spec non compliances as errors
+#define AV_EF_AGGRESSIVE \
+  (1 << 18)  ///< consider things that a sane encoder/muxer should not do as an
+             ///< error
+
+#define FF_COMPLIANCE_VERY_STRICT \
+  2  ///< Strictly conform to an older more strict version of the spec or
+     ///< reference software.
+#define FF_COMPLIANCE_STRICT \
+  1  ///< Strictly conform to all the things in the spec no matter what
+     ///< consequences.
+#define FF_COMPLIANCE_NORMAL 0
+#define FF_COMPLIANCE_UNOFFICIAL -1  ///< Allow unofficial extensions
+#define FF_COMPLIANCE_EXPERIMENTAL \
+  -2  ///< Allow nonstandardized experimental things.
+
+#define AV_PROFILE_UNKNOWN -99
+#define AV_PROFILE_RESERVED -100
+
+#define AV_PROFILE_AAC_MAIN 0
+#define AV_PROFILE_AAC_LOW 1
+#define AV_PROFILE_AAC_SSR 2
+#define AV_PROFILE_AAC_LTP 3
+#define AV_PROFILE_AAC_HE 4
+#define AV_PROFILE_AAC_HE_V2 28
+#define AV_PROFILE_AAC_LD 22
+#define AV_PROFILE_AAC_ELD 38
+#define AV_PROFILE_MPEG2_AAC_LOW 128
+#define AV_PROFILE_MPEG2_AAC_HE 131
+
+#define AV_PROFILE_DNXHD 0
+#define AV_PROFILE_DNXHR_LB 1
+#define AV_PROFILE_DNXHR_SQ 2
+#define AV_PROFILE_DNXHR_HQ 3
+#define AV_PROFILE_DNXHR_HQX 4
+#define AV_PROFILE_DNXHR_444 5
+
+#define AV_PROFILE_DTS 20
+#define AV_PROFILE_DTS_ES 30
+#define AV_PROFILE_DTS_96_24 40
+#define AV_PROFILE_DTS_HD_HRA 50
+#define AV_PROFILE_DTS_HD_MA 60
+#define AV_PROFILE_DTS_EXPRESS 70
+#define AV_PROFILE_DTS_HD_MA_X 61
+#define AV_PROFILE_DTS_HD_MA_X_IMAX 62
+
+#define AV_PROFILE_EAC3_DDP_ATMOS 30
+
+#define AV_PROFILE_TRUEHD_ATMOS 30
+
+#define AV_PROFILE_MPEG2_422 0
+#define AV_PROFILE_MPEG2_HIGH 1
+#define AV_PROFILE_MPEG2_SS 2
+#define AV_PROFILE_MPEG2_SNR_SCALABLE 3
+#define AV_PROFILE_MPEG2_MAIN 4
+#define AV_PROFILE_MPEG2_SIMPLE 5
+
+#define AV_PROFILE_H264_CONSTRAINED (1 << 9)  // 8+1; constraint_set1_flag
+#define AV_PROFILE_H264_INTRA (1 << 11)       // 8+3; constraint_set3_flag
+
+#define AV_PROFILE_H264_BASELINE 66
+#define AV_PROFILE_H264_CONSTRAINED_BASELINE (66 | AV_PROFILE_H264_CONSTRAINED)
+#define AV_PROFILE_H264_MAIN 77
+#define AV_PROFILE_H264_EXTENDED 88
+#define AV_PROFILE_H264_HIGH 100
+#define AV_PROFILE_H264_HIGH_10 110
+#define AV_PROFILE_H264_HIGH_10_INTRA (110 | AV_PROFILE_H264_INTRA)
+#define AV_PROFILE_H264_MULTIVIEW_HIGH 118
+#define AV_PROFILE_H264_HIGH_422 122
+#define AV_PROFILE_H264_HIGH_422_INTRA (122 | AV_PROFILE_H264_INTRA)
+#define AV_PROFILE_H264_STEREO_HIGH 128
+#define AV_PROFILE_H264_HIGH_444 144
+#define AV_PROFILE_H264_HIGH_444_PREDICTIVE 244
+#define AV_PROFILE_H264_HIGH_444_INTRA (244 | AV_PROFILE_H264_INTRA)
+#define AV_PROFILE_H264_CAVLC_444 44
+
+#define AV_PROFILE_VC1_SIMPLE 0
+#define AV_PROFILE_VC1_MAIN 1
+#define AV_PROFILE_VC1_COMPLEX 2
+#define AV_PROFILE_VC1_ADVANCED 3
+
+#define AV_PROFILE_MPEG4_SIMPLE 0
+#define AV_PROFILE_MPEG4_SIMPLE_SCALABLE 1
+#define AV_PROFILE_MPEG4_CORE 2
+#define AV_PROFILE_MPEG4_MAIN 3
+#define AV_PROFILE_MPEG4_N_BIT 4
+#define AV_PROFILE_MPEG4_SCALABLE_TEXTURE 5
+#define AV_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
+#define AV_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
+#define AV_PROFILE_MPEG4_HYBRID 8
+#define AV_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
+#define AV_PROFILE_MPEG4_CORE_SCALABLE 10
+#define AV_PROFILE_MPEG4_ADVANCED_CODING 11
+#define AV_PROFILE_MPEG4_ADVANCED_CORE 12
+#define AV_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
+#define AV_PROFILE_MPEG4_SIMPLE_STUDIO 14
+#define AV_PROFILE_MPEG4_ADVANCED_SIMPLE 15
+
+#define AV_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1
+#define AV_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2
+#define AV_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768
+#define AV_PROFILE_JPEG2000_DCINEMA_2K 3
+#define AV_PROFILE_JPEG2000_DCINEMA_4K 4
+
+#define AV_PROFILE_VP9_0 0
+#define AV_PROFILE_VP9_1 1
+#define AV_PROFILE_VP9_2 2
+#define AV_PROFILE_VP9_3 3
+
+#define AV_PROFILE_HEVC_MAIN 1
+#define AV_PROFILE_HEVC_MAIN_10 2
+#define AV_PROFILE_HEVC_MAIN_STILL_PICTURE 3
+#define AV_PROFILE_HEVC_REXT 4
+#define AV_PROFILE_HEVC_SCC 9
+
+#define AV_PROFILE_VVC_MAIN_10 1
+#define AV_PROFILE_VVC_MAIN_10_444 33
+
+#define AV_PROFILE_AV1_MAIN 0
+#define AV_PROFILE_AV1_HIGH 1
+#define AV_PROFILE_AV1_PROFESSIONAL 2
+
+#define AV_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT 0xc0
+#define AV_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT 0xc1
+#define AV_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT 0xc2
+#define AV_PROFILE_MJPEG_HUFFMAN_LOSSLESS 0xc3
+#define AV_PROFILE_MJPEG_JPEG_LS 0xf7
+
+#define AV_PROFILE_SBC_MSBC 1
+
+#define AV_PROFILE_PRORES_PROXY 0
+#define AV_PROFILE_PRORES_LT 1
+#define AV_PROFILE_PRORES_STANDARD 2
+#define AV_PROFILE_PRORES_HQ 3
+#define AV_PROFILE_PRORES_4444 4
+#define AV_PROFILE_PRORES_XQ 5
+
+#define AV_PROFILE_ARIB_PROFILE_A 0
+#define AV_PROFILE_ARIB_PROFILE_C 1
+
+#define AV_PROFILE_KLVA_SYNC 0
+#define AV_PROFILE_KLVA_ASYNC 1
+
+#define AV_PROFILE_EVC_BASELINE 0
+#define AV_PROFILE_EVC_MAIN 1
+
+#define AV_LEVEL_UNKNOWN -99
+
+enum AVFieldOrder {
+  AV_FIELD_UNKNOWN,
+  AV_FIELD_PROGRESSIVE,
+  AV_FIELD_TT,  ///< Top coded_first, top displayed first
+  AV_FIELD_BB,  ///< Bottom coded first, bottom displayed first
+  AV_FIELD_TB,  ///< Top coded first, bottom displayed first
+  AV_FIELD_BT,  ///< Bottom coded first, top displayed first
+};
+
+/**
+ * @ingroup lavc_decoding
+ */
+enum AVDiscard {
+  /* We leave some space between them for extensions (drop some
+   * keyframes for intra-only or drop just some bidir frames). */
+  AVDISCARD_NONE = -16,  ///< discard nothing
+  AVDISCARD_DEFAULT =
+      0,                 ///< discard useless packets like 0 size packets in avi
+  AVDISCARD_NONREF = 8,  ///< discard all non reference
+  AVDISCARD_BIDIR = 16,  ///< discard all bidirectional frames
+  AVDISCARD_NONINTRA = 24,  ///< discard all non intra frames
+  AVDISCARD_NONKEY = 32,    ///< discard all frames except keyframes
+  AVDISCARD_ALL = 48,       ///< discard all
+};
+
+enum AVAudioServiceType {
+  AV_AUDIO_SERVICE_TYPE_MAIN = 0,
+  AV_AUDIO_SERVICE_TYPE_EFFECTS = 1,
+  AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2,
+  AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3,
+  AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4,
+  AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5,
+  AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6,
+  AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7,
+  AV_AUDIO_SERVICE_TYPE_KARAOKE = 8,
+  AV_AUDIO_SERVICE_TYPE_NB,  ///< Not part of ABI
+};
+
+/**
+ * Pan Scan area.
+ * This specifies the area which should be displayed.
+ * Note there may be multiple such areas for one frame.
+ */
+typedef struct AVPanScan {
+  /**
+   * id
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  int id;
+
+  /**
+   * width and height in 1/16 pel
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  int width;
+  int height;
+
+  /**
+   * position of the top left corner in 1/16 pel for up to 3 fields/frames
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  int16_t position[3][2];
+} AVPanScan;
+
+/**
+ * This structure describes the bitrate properties of an encoded bitstream. It
+ * roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD
+ * parameters for H.264/HEVC.
+ */
+typedef struct AVCPBProperties {
+  /**
+   * Maximum bitrate of the stream, in bits per second.
+   * Zero if unknown or unspecified.
+   */
+  int64_t max_bitrate;
+  /**
+   * Minimum bitrate of the stream, in bits per second.
+   * Zero if unknown or unspecified.
+   */
+  int64_t min_bitrate;
+  /**
+   * Average bitrate of the stream, in bits per second.
+   * Zero if unknown or unspecified.
+   */
+  int64_t avg_bitrate;
+
+  /**
+   * The size of the buffer to which the ratecontrol is applied, in bits.
+   * Zero if unknown or unspecified.
+   */
+  int64_t buffer_size;
+
+  /**
+   * The delay between the time the packet this structure is associated with
+   * is received and the time when it should be decoded, in periods of a 27MHz
+   * clock.
+   *
+   * UINT64_MAX when unknown or unspecified.
+   */
+  uint64_t vbv_delay;
+} AVCPBProperties;
+
+/**
+ * Allocate a CPB properties structure and initialize its fields to default
+ * values.
+ *
+ * @param size if non-NULL, the size of the allocated struct will be written
+ *             here. This is useful for embedding it in side data.
+ *
+ * @return the newly allocated struct or NULL on failure
+ */
+AVCPBProperties* av_cpb_properties_alloc(size_t* size);
+
+/**
+ * This structure supplies correlation between a packet timestamp and a wall
+ * clock production time. The definition follows the Producer Reference Time
+ * ('prft') as defined in ISO/IEC 14496-12
+ */
+typedef struct AVProducerReferenceTime {
+  /**
+   * A UTC timestamp, in microseconds, since Unix epoch (e.g, av_gettime()).
+   */
+  int64_t wallclock;
+  int flags;
+} AVProducerReferenceTime;
+
+/**
+ * Encode extradata length to a buffer. Used by xiph codecs.
+ *
+ * @param s buffer to write to; must be at least (v/255+1) bytes long
+ * @param v size of extradata in bytes
+ * @return number of bytes written to the buffer.
+ */
+unsigned int av_xiphlacing(unsigned char* s, unsigned int v);
+
+#endif  // AVCODEC_DEFS_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/packet.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/packet.h
new file mode 100644
index 0000000000..58fde480c9
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/packet.h
@@ -0,0 +1,871 @@
+/*
+ * AVPacket public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_PACKET_H
+#define AVCODEC_PACKET_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/buffer.h"
+#include "libavutil/dict.h"
+#include "libavutil/rational.h"
+#include "libavutil/version.h"
+
+#include "libavcodec/version_major.h"
+
+/**
+ * @defgroup lavc_packet_side_data AVPacketSideData
+ *
+ * Types and functions for working with AVPacketSideData.
+ * @{
+ */
+enum AVPacketSideDataType {
+  /**
+   * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE
+   * bytes worth of palette. This side data signals that a new palette is
+   * present.
+   */
+  AV_PKT_DATA_PALETTE,
+
+  /**
+   * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format
+   * that the extradata buffer was changed and the receiving side should
+   * act upon it appropriately. The new extradata is embedded in the side
+   * data buffer and should be immediately used for processing the current
+   * frame or packet.
+   */
+  AV_PKT_DATA_NEW_EXTRADATA,
+
+  /**
+   * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
+   * @code
+   * u32le param_flags
+   * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
+   *     s32le channel_count
+   * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
+   *     u64le channel_layout
+   * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
+   *     s32le sample_rate
+   * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
+   *     s32le width
+   *     s32le height
+   * @endcode
+   */
+  AV_PKT_DATA_PARAM_CHANGE,
+
+  /**
+   * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
+   * structures with info about macroblocks relevant to splitting the
+   * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
+   * That is, it does not necessarily contain info about all macroblocks,
+   * as long as the distance between macroblocks in the info is smaller
+   * than the target payload size.
+   * Each MB info structure is 12 bytes, and is laid out as follows:
+   * @code
+   * u32le bit offset from the start of the packet
+   * u8    current quantizer at the start of the macroblock
+   * u8    GOB number
+   * u16le macroblock address within the GOB
+   * u8    horizontal MV predictor
+   * u8    vertical MV predictor
+   * u8    horizontal MV predictor for block number 3
+   * u8    vertical MV predictor for block number 3
+   * @endcode
+   */
+  AV_PKT_DATA_H263_MB_INFO,
+
+  /**
+   * This side data should be associated with an audio stream and contains
+   * ReplayGain information in form of the AVReplayGain struct.
+   */
+  AV_PKT_DATA_REPLAYGAIN,
+
+  /**
+   * This side data contains a 3x3 transformation matrix describing an affine
+   * transformation that needs to be applied to the decoded video frames for
+   * correct presentation.
+   *
+   * See libavutil/display.h for a detailed description of the data.
+   */
+  AV_PKT_DATA_DISPLAYMATRIX,
+
+  /**
+   * This side data should be associated with a video stream and contains
+   * Stereoscopic 3D information in form of the AVStereo3D struct.
+   */
+  AV_PKT_DATA_STEREO3D,
+
+  /**
+   * This side data should be associated with an audio stream and corresponds
+   * to enum AVAudioServiceType.
+   */
+  AV_PKT_DATA_AUDIO_SERVICE_TYPE,
+
+  /**
+   * This side data contains quality related information from the encoder.
+   * @code
+   * u32le quality factor of the compressed frame. Allowed range is between 1
+   * (good) and FF_LAMBDA_MAX (bad). u8    picture type u8    error count u16
+   * reserved u64le[error count] sum of squared differences between encoder in
+   * and output
+   * @endcode
+   */
+  AV_PKT_DATA_QUALITY_STATS,
+
+  /**
+   * This side data contains an integer value representing the stream index
+   * of a "fallback" track.  A fallback track indicates an alternate
+   * track to use when the current track can not be decoded for some reason.
+   * e.g. no decoder available for codec.
+   */
+  AV_PKT_DATA_FALLBACK_TRACK,
+
+  /**
+   * This side data corresponds to the AVCPBProperties struct.
+   */
+  AV_PKT_DATA_CPB_PROPERTIES,
+
+  /**
+   * Recommmends skipping the specified number of samples
+   * @code
+   * u32le number of samples to skip from start of this packet
+   * u32le number of samples to skip from end of this packet
+   * u8    reason for start skip
+   * u8    reason for end   skip (0=padding silence, 1=convergence)
+   * @endcode
+   */
+  AV_PKT_DATA_SKIP_SAMPLES,
+
+  /**
+   * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
+   * the packet may contain "dual mono" audio specific to Japanese DTV
+   * and if it is true, recommends only the selected channel to be used.
+   * @code
+   * u8    selected channels (0=main/left, 1=sub/right, 2=both)
+   * @endcode
+   */
+  AV_PKT_DATA_JP_DUALMONO,
+
+  /**
+   * A list of zero terminated key/value strings. There is no end marker for
+   * the list, so it is required to rely on the side data size to stop.
+   */
+  AV_PKT_DATA_STRINGS_METADATA,
+
+  /**
+   * Subtitle event position
+   * @code
+   * u32le x1
+   * u32le y1
+   * u32le x2
+   * u32le y2
+   * @endcode
+   */
+  AV_PKT_DATA_SUBTITLE_POSITION,
+
+  /**
+   * Data found in BlockAdditional element of matroska container. There is
+   * no end marker for the data, so it is required to rely on the side data
+   * size to recognize the end. 8 byte id (as found in BlockAddId) followed
+   * by data.
+   */
+  AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
+
+  /**
+   * The optional first identifier line of a WebVTT cue.
+   */
+  AV_PKT_DATA_WEBVTT_IDENTIFIER,
+
+  /**
+   * The optional settings (rendering instructions) that immediately
+   * follow the timestamp specifier of a WebVTT cue.
+   */
+  AV_PKT_DATA_WEBVTT_SETTINGS,
+
+  /**
+   * A list of zero terminated key/value strings. There is no end marker for
+   * the list, so it is required to rely on the side data size to stop. This
+   * side data includes updated metadata which appeared in the stream.
+   */
+  AV_PKT_DATA_METADATA_UPDATE,
+
+  /**
+   * MPEGTS stream ID as uint8_t, this is required to pass the stream ID
+   * information from the demuxer to the corresponding muxer.
+   */
+  AV_PKT_DATA_MPEGTS_STREAM_ID,
+
+  /**
+   * Mastering display metadata (based on SMPTE-2086:2014). This metadata
+   * should be associated with a video stream and contains data in the form
+   * of the AVMasteringDisplayMetadata struct.
+   */
+  AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+
+  /**
+   * This side data should be associated with a video stream and corresponds
+   * to the AVSphericalMapping structure.
+   */
+  AV_PKT_DATA_SPHERICAL,
+
+  /**
+   * Content light level (based on CTA-861.3). This metadata should be
+   * associated with a video stream and contains data in the form of the
+   * AVContentLightMetadata struct.
+   */
+  AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
+
+  /**
+   * ATSC A53 Part 4 Closed Captions. This metadata should be associated with
+   * a video stream. A53 CC bitstream is stored as uint8_t in
+   * AVPacketSideData.data. The number of bytes of CC data is
+   * AVPacketSideData.size.
+   */
+  AV_PKT_DATA_A53_CC,
+
+  /**
+   * This side data is encryption initialization data.
+   * The format is not part of ABI, use av_encryption_init_info_* methods to
+   * access.
+   */
+  AV_PKT_DATA_ENCRYPTION_INIT_INFO,
+
+  /**
+   * This side data contains encryption info for how to decrypt the packet.
+   * The format is not part of ABI, use av_encryption_info_* methods to access.
+   */
+  AV_PKT_DATA_ENCRYPTION_INFO,
+
+  /**
+   * Active Format Description data consisting of a single byte as specified
+   * in ETSI TS 101 154 using AVActiveFormatDescription enum.
+   */
+  AV_PKT_DATA_AFD,
+
+  /**
+   * Producer Reference Time data corresponding to the AVProducerReferenceTime
+   * struct, usually exported by some encoders (on demand through the prft flag
+   * set in the AVCodecContext export_side_data field).
+   */
+  AV_PKT_DATA_PRFT,
+
+  /**
+   * ICC profile data consisting of an opaque octet buffer following the
+   * format described by ISO 15076-1.
+   */
+  AV_PKT_DATA_ICC_PROFILE,
+
+  /**
+   * DOVI configuration
+   * ref:
+   * dolby-vision-bitstreams-within-the-iso-base-media-file-format-v2.1.2,
+   * section 2.2
+   * dolby-vision-bitstreams-in-mpeg-2-transport-stream-multiplex-v1.2,
+   * section 3.3 Tags are stored in struct AVDOVIDecoderConfigurationRecord.
+   */
+  AV_PKT_DATA_DOVI_CONF,
+
+  /**
+   * Timecode which conforms to SMPTE ST 12-1:2014. The data is an array of 4
+   * uint32_t where the first uint32_t describes how many (1-3) of the other
+   * timecodes are used. The timecode format is described in the documentation
+   * of av_timecode_get_smpte_from_framenum() function in libavutil/timecode.h.
+   */
+  AV_PKT_DATA_S12M_TIMECODE,
+
+  /**
+   * HDR10+ dynamic metadata associated with a video frame. The metadata is in
+   * the form of the AVDynamicHDRPlus struct and contains
+   * information for color volume transform - application 4 of
+   * SMPTE 2094-40:2016 standard.
+   */
+  AV_PKT_DATA_DYNAMIC_HDR10_PLUS,
+
+  /**
+   * IAMF Mix Gain Parameter Data associated with the audio frame. This metadata
+   * is in the form of the AVIAMFParamDefinition struct and contains information
+   * defined in sections 3.6.1 and 3.8.1 of the Immersive Audio Model and
+   * Formats standard.
+   */
+  AV_PKT_DATA_IAMF_MIX_GAIN_PARAM,
+
+  /**
+   * IAMF Demixing Info Parameter Data associated with the audio frame. This
+   * metadata is in the form of the AVIAMFParamDefinition struct and contains
+   * information defined in sections 3.6.1 and 3.8.2 of the Immersive Audio
+   * Model and Formats standard.
+   */
+  AV_PKT_DATA_IAMF_DEMIXING_INFO_PARAM,
+
+  /**
+   * IAMF Recon Gain Info Parameter Data associated with the audio frame. This
+   * metadata is in the form of the AVIAMFParamDefinition struct and contains
+   * information defined in sections 3.6.1 and 3.8.3 of the Immersive Audio
+   * Model and Formats standard.
+   */
+  AV_PKT_DATA_IAMF_RECON_GAIN_INFO_PARAM,
+
+  /**
+   * Ambient viewing environment metadata, as defined by H.274. This metadata
+   * should be associated with a video stream and contains data in the form
+   * of the AVAmbientViewingEnvironment struct.
+   */
+  AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT,
+
+  /**
+   * The number of side data types.
+   * This is not part of the public API/ABI in the sense that it may
+   * change when new side data types are added.
+   * This must stay the last enum value.
+   * If its value becomes huge, some code using it
+   * needs to be updated as it assumes it to be smaller than other limits.
+   */
+  AV_PKT_DATA_NB
+};
+
+#if FF_API_QUALITY_FACTOR
+#  define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS  // DEPRECATED
+#endif
+
+/**
+ * This structure stores auxiliary information for decoding, presenting, or
+ * otherwise processing the coded stream. It is typically exported by demuxers
+ * and encoders and can be fed to decoders and muxers either in a per packet
+ * basis, or as global side data (applying to the entire coded stream).
+ *
+ * Global side data is handled as follows:
+ * - During demuxing, it may be exported through
+ *   @ref AVStream.codecpar.side_data "AVStream's codec parameters", which can
+ *   then be passed as input to decoders through the
+ *   @ref AVCodecContext.coded_side_data "decoder context's side data", for
+ *   initialization.
+ * - For muxing, it can be fed through @ref AVStream.codecpar.side_data
+ *   "AVStream's codec parameters", typically  the output of encoders through
+ *   the @ref AVCodecContext.coded_side_data "encoder context's side data", for
+ *   initialization.
+ *
+ * Packet specific side data is handled as follows:
+ * - During demuxing, it may be exported through @ref AVPacket.side_data
+ *   "AVPacket's side data", which can then be passed as input to decoders.
+ * - For muxing, it can be fed through @ref AVPacket.side_data "AVPacket's
+ *   side data", typically the output of encoders.
+ *
+ * Different modules may accept or export different types of side data
+ * depending on media type and codec. Refer to @ref AVPacketSideDataType for a
+ * list of defined types and where they may be found or used.
+ */
+typedef struct AVPacketSideData {
+  uint8_t* data;
+  size_t size;
+  enum AVPacketSideDataType type;
+} AVPacketSideData;
+
+/**
+ * Allocate a new packet side data.
+ *
+ * @param sd    pointer to an array of side data to which the side data should
+ *              be added. *sd may be NULL, in which case the array will be
+ *              initialized.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. The integer value will be increased by 1 on success.
+ * @param type  side data type
+ * @param size  desired side data size
+ * @param flags currently unused. Must be zero
+ *
+ * @return pointer to freshly allocated side data on success, or NULL otherwise.
+ */
+AVPacketSideData* av_packet_side_data_new(AVPacketSideData** psd, int* pnb_sd,
+                                          enum AVPacketSideDataType type,
+                                          size_t size, int flags);
+
+/**
+ * Wrap existing data as packet side data.
+ *
+ * @param sd    pointer to an array of side data to which the side data should
+ *              be added. *sd may be NULL, in which case the array will be
+ *              initialized
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. The integer value will be increased by 1 on success.
+ * @param type  side data type
+ * @param data  a data array. It must be allocated with the av_malloc() family
+ *              of functions. The ownership of the data is transferred to the
+ *              side data array on success
+ * @param size  size of the data array
+ * @param flags currently unused. Must be zero
+ *
+ * @return pointer to freshly allocated side data on success, or NULL otherwise
+ *         On failure, the side data array is unchanged and the data remains
+ *         owned by the caller.
+ */
+AVPacketSideData* av_packet_side_data_add(AVPacketSideData** sd, int* nb_sd,
+                                          enum AVPacketSideDataType type,
+                                          void* data, size_t size, int flags);
+
+/**
+ * Get side information from a side data array.
+ *
+ * @param sd    the array from which the side data should be fetched
+ * @param nb_sd value containing the number of entries in the array.
+ * @param type  desired side information type
+ *
+ * @return pointer to side data if present or NULL otherwise
+ */
+const AVPacketSideData* av_packet_side_data_get(const AVPacketSideData* sd,
+                                                int nb_sd,
+                                                enum AVPacketSideDataType type);
+
+/**
+ * Remove side data of the given type from a side data array.
+ *
+ * @param sd    the array from which the side data should be removed
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. Will be reduced by the amount of entries removed
+ *              upon return
+ * @param type  side information type
+ */
+void av_packet_side_data_remove(AVPacketSideData* sd, int* nb_sd,
+                                enum AVPacketSideDataType type);
+
+/**
+ * Convenience function to free all the side data stored in an array, and
+ * the array itself.
+ *
+ * @param sd    pointer to array of side data to free. Will be set to NULL
+ *              upon return.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. Will be set to 0 upon return.
+ */
+void av_packet_side_data_free(AVPacketSideData** sd, int* nb_sd);
+
+const char* av_packet_side_data_name(enum AVPacketSideDataType type);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavc_packet AVPacket
+ *
+ * Types and functions for working with AVPacket.
+ * @{
+ */
+
+/**
+ * This structure stores compressed data. It is typically exported by demuxers
+ * and then passed as input to decoders, or received as output from encoders and
+ * then passed to muxers.
+ *
+ * For video, it should typically contain one compressed frame. For audio it may
+ * contain several compressed frames. Encoders are allowed to output empty
+ * packets, with no compressed data, containing only side data
+ * (e.g. to update some stream parameters at the end of encoding).
+ *
+ * The semantics of data ownership depends on the buf field.
+ * If it is set, the packet data is dynamically allocated and is
+ * valid indefinitely until a call to av_packet_unref() reduces the
+ * reference count to 0.
+ *
+ * If the buf field is not set av_packet_ref() would make a copy instead
+ * of increasing the reference count.
+ *
+ * The side data is always allocated with av_malloc(), copied by
+ * av_packet_ref() and freed by av_packet_unref().
+ *
+ * sizeof(AVPacket) being a part of the public ABI is deprecated. once
+ * av_init_packet() is removed, new packets will only be able to be allocated
+ * with av_packet_alloc(), and new fields may be added to the end of the struct
+ * with a minor bump.
+ *
+ * @see av_packet_alloc
+ * @see av_packet_ref
+ * @see av_packet_unref
+ */
+typedef struct AVPacket {
+  /**
+   * A reference to the reference-counted buffer where the packet data is
+   * stored.
+   * May be NULL, then the packet data is not reference-counted.
+   */
+  AVBufferRef* buf;
+  /**
+   * Presentation timestamp in AVStream->time_base units; the time at which
+   * the decompressed packet will be presented to the user.
+   * Can be AV_NOPTS_VALUE if it is not stored in the file.
+   * pts MUST be larger or equal to dts as presentation cannot happen before
+   * decompression, unless one wants to view hex dumps. Some formats misuse
+   * the terms dts and pts/cts to mean something different. Such timestamps
+   * must be converted to true pts/dts before they are stored in AVPacket.
+   */
+  int64_t pts;
+  /**
+   * Decompression timestamp in AVStream->time_base units; the time at which
+   * the packet is decompressed.
+   * Can be AV_NOPTS_VALUE if it is not stored in the file.
+   */
+  int64_t dts;
+  uint8_t* data;
+  int size;
+  int stream_index;
+  /**
+   * A combination of AV_PKT_FLAG values
+   */
+  int flags;
+  /**
+   * Additional packet data that can be provided by the container.
+   * Packet can contain several types of side information.
+   */
+  AVPacketSideData* side_data;
+  int side_data_elems;
+
+  /**
+   * Duration of this packet in AVStream->time_base units, 0 if unknown.
+   * Equals next_pts - this_pts in presentation order.
+   */
+  int64_t duration;
+
+  int64_t pos;  ///< byte position in stream, -1 if unknown
+
+  /**
+   * for some private data of the user
+   */
+  void* opaque;
+
+  /**
+   * AVBufferRef for free use by the API user. FFmpeg will never check the
+   * contents of the buffer ref. FFmpeg calls av_buffer_unref() on it when
+   * the packet is unreferenced. av_packet_copy_props() calls create a new
+   * reference with av_buffer_ref() for the target packet's opaque_ref field.
+   *
+   * This is unrelated to the opaque field, although it serves a similar
+   * purpose.
+   */
+  AVBufferRef* opaque_ref;
+
+  /**
+   * Time base of the packet's timestamps.
+   * In the future, this field may be set on packets output by encoders or
+   * demuxers, but its value will be by default ignored on input to decoders
+   * or muxers.
+   */
+  AVRational time_base;
+} AVPacket;
+
+#if FF_API_INIT_PACKET
+attribute_deprecated typedef struct AVPacketList {
+  AVPacket pkt;
+  struct AVPacketList* next;
+} AVPacketList;
+#endif
+
+#define AV_PKT_FLAG_KEY 0x0001      ///< The packet contains a keyframe
+#define AV_PKT_FLAG_CORRUPT 0x0002  ///< The packet content is corrupted
+/**
+ * Flag is used to discard packets which are required to maintain valid
+ * decoder state but are not required for output and should be dropped
+ * after decoding.
+ **/
+#define AV_PKT_FLAG_DISCARD 0x0004
+/**
+ * The packet comes from a trusted source.
+ *
+ * Otherwise-unsafe constructs such as arbitrary pointers to data
+ * outside the packet may be followed.
+ */
+#define AV_PKT_FLAG_TRUSTED 0x0008
+/**
+ * Flag is used to indicate packets that contain frames that can
+ * be discarded by the decoder.  I.e. Non-reference frames.
+ */
+#define AV_PKT_FLAG_DISPOSABLE 0x0010
+
+enum AVSideDataParamChangeFlags {
+  AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004,
+  AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008,
+};
+
+/**
+ * Allocate an AVPacket and set its fields to default values.  The resulting
+ * struct must be freed using av_packet_free().
+ *
+ * @return An AVPacket filled with default values or NULL on failure.
+ *
+ * @note this only allocates the AVPacket itself, not the data buffers. Those
+ * must be allocated through other means such as av_new_packet.
+ *
+ * @see av_new_packet
+ */
+AVPacket* av_packet_alloc(void);
+
+/**
+ * Create a new packet that references the same data as src.
+ *
+ * This is a shortcut for av_packet_alloc()+av_packet_ref().
+ *
+ * @return newly created AVPacket on success, NULL on error.
+ *
+ * @see av_packet_alloc
+ * @see av_packet_ref
+ */
+AVPacket* av_packet_clone(const AVPacket* src);
+
+/**
+ * Free the packet, if the packet is reference counted, it will be
+ * unreferenced first.
+ *
+ * @param pkt packet to be freed. The pointer will be set to NULL.
+ * @note passing NULL is a no-op.
+ */
+void av_packet_free(AVPacket** pkt);
+
+#if FF_API_INIT_PACKET
+/**
+ * Initialize optional fields of a packet with default values.
+ *
+ * Note, this does not touch the data and size members, which have to be
+ * initialized separately.
+ *
+ * @param pkt packet
+ *
+ * @see av_packet_alloc
+ * @see av_packet_unref
+ *
+ * @deprecated This function is deprecated. Once it's removed,
+               sizeof(AVPacket) will not be a part of the ABI anymore.
+ */
+attribute_deprecated void av_init_packet(AVPacket* pkt);
+#endif
+
+/**
+ * Allocate the payload of a packet and initialize its fields with
+ * default values.
+ *
+ * @param pkt packet
+ * @param size wanted payload size
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
+int av_new_packet(AVPacket* pkt, int size);
+
+/**
+ * Reduce packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param size new size
+ */
+void av_shrink_packet(AVPacket* pkt, int size);
+
+/**
+ * Increase packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param grow_by number of bytes by which to increase the size of the packet
+ */
+int av_grow_packet(AVPacket* pkt, int grow_by);
+
+/**
+ * Initialize a reference-counted packet from av_malloc()ed data.
+ *
+ * @param pkt packet to be initialized. This function will set the data, size,
+ *        and buf fields, all others are left untouched.
+ * @param data Data allocated by av_malloc() to be used as packet data. If this
+ *        function returns successfully, the data is owned by the underlying
+ * AVBuffer. The caller may not access the data through other means.
+ * @param size size of data in bytes, without the padding. I.e. the full buffer
+ *        size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
+ *
+ * @return 0 on success, a negative AVERROR on error
+ */
+int av_packet_from_data(AVPacket* pkt, uint8_t* data, int size);
+
+/**
+ * Allocate new information of a packet.
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param size side information size
+ * @return pointer to fresh allocated data or NULL otherwise
+ */
+uint8_t* av_packet_new_side_data(AVPacket* pkt, enum AVPacketSideDataType type,
+                                 size_t size);
+
+/**
+ * Wrap an existing array as a packet side data.
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param data the side data array. It must be allocated with the av_malloc()
+ *             family of functions. The ownership of the data is transferred to
+ *             pkt.
+ * @param size side information size
+ * @return a non-negative number on success, a negative AVERROR code on
+ *         failure. On failure, the packet is unchanged and the data remains
+ *         owned by the caller.
+ */
+int av_packet_add_side_data(AVPacket* pkt, enum AVPacketSideDataType type,
+                            uint8_t* data, size_t size);
+
+/**
+ * Shrink the already allocated side data buffer
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param size new side information size
+ * @return 0 on success, < 0 on failure
+ */
+int av_packet_shrink_side_data(AVPacket* pkt, enum AVPacketSideDataType type,
+                               size_t size);
+
+/**
+ * Get side information from packet.
+ *
+ * @param pkt packet
+ * @param type desired side information type
+ * @param size If supplied, *size will be set to the size of the side data
+ *             or to zero if the desired side data is not present.
+ * @return pointer to data if present or NULL otherwise
+ */
+uint8_t* av_packet_get_side_data(const AVPacket* pkt,
+                                 enum AVPacketSideDataType type, size_t* size);
+
+/**
+ * Pack a dictionary for use in side_data.
+ *
+ * @param dict The dictionary to pack.
+ * @param size pointer to store the size of the returned data
+ * @return pointer to data if successful, NULL otherwise
+ */
+uint8_t* av_packet_pack_dictionary(AVDictionary* dict, size_t* size);
+/**
+ * Unpack a dictionary from side_data.
+ *
+ * @param data data from side_data
+ * @param size size of the data
+ * @param dict the metadata storage dictionary
+ * @return 0 on success, < 0 on failure
+ */
+int av_packet_unpack_dictionary(const uint8_t* data, size_t size,
+                                AVDictionary** dict);
+
+/**
+ * Convenience function to free all the side data stored.
+ * All the other fields stay untouched.
+ *
+ * @param pkt packet
+ */
+void av_packet_free_side_data(AVPacket* pkt);
+
+/**
+ * Setup a new reference to the data described by a given packet
+ *
+ * If src is reference-counted, setup dst as a new reference to the
+ * buffer in src. Otherwise allocate a new buffer in dst and copy the
+ * data from src into it.
+ *
+ * All the other fields are copied from src.
+ *
+ * @see av_packet_unref
+ *
+ * @param dst Destination packet. Will be completely overwritten.
+ * @param src Source packet
+ *
+ * @return 0 on success, a negative AVERROR on error. On error, dst
+ *         will be blank (as if returned by av_packet_alloc()).
+ */
+int av_packet_ref(AVPacket* dst, const AVPacket* src);
+
+/**
+ * Wipe the packet.
+ *
+ * Unreference the buffer referenced by the packet and reset the
+ * remaining packet fields to their default values.
+ *
+ * @param pkt The packet to be unreferenced.
+ */
+void av_packet_unref(AVPacket* pkt);
+
+/**
+ * Move every field in src to dst and reset src.
+ *
+ * @see av_packet_unref
+ *
+ * @param src Source packet, will be reset
+ * @param dst Destination packet
+ */
+void av_packet_move_ref(AVPacket* dst, AVPacket* src);
+
+/**
+ * Copy only "properties" fields from src to dst.
+ *
+ * Properties for the purpose of this function are all the fields
+ * beside those related to the packet data (buf, data, size)
+ *
+ * @param dst Destination packet
+ * @param src Source packet
+ *
+ * @return 0 on success AVERROR on failure.
+ */
+int av_packet_copy_props(AVPacket* dst, const AVPacket* src);
+
+/**
+ * Ensure the data described by a given packet is reference counted.
+ *
+ * @note This function does not ensure that the reference will be writable.
+ *       Use av_packet_make_writable instead for that purpose.
+ *
+ * @see av_packet_ref
+ * @see av_packet_make_writable
+ *
+ * @param pkt packet whose data should be made reference counted.
+ *
+ * @return 0 on success, a negative AVERROR on error. On failure, the
+ *         packet is unchanged.
+ */
+int av_packet_make_refcounted(AVPacket* pkt);
+
+/**
+ * Create a writable reference for the data described by a given packet,
+ * avoiding data copy if possible.
+ *
+ * @param pkt Packet whose data should be made writable.
+ *
+ * @return 0 on success, a negative AVERROR on failure. On failure, the
+ *         packet is unchanged.
+ */
+int av_packet_make_writable(AVPacket* pkt);
+
+/**
+ * Convert valid timing fields (timestamps / durations) in a packet from one
+ * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
+ * ignored.
+ *
+ * @param pkt packet on which the conversion will be performed
+ * @param tb_src source timebase, in which the timing fields in pkt are
+ *               expressed
+ * @param tb_dst destination timebase, to which the timing fields will be
+ *               converted
+ */
+void av_packet_rescale_ts(AVPacket* pkt, AVRational tb_src, AVRational tb_dst);
+
+/**
+ * @}
+ */
+
+#endif  // AVCODEC_PACKET_H
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/vdpau.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/vdpau.h
new file mode 100644
index 0000000000..4f0d956ce7
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/vdpau.h
@@ -0,0 +1,168 @@
+/*
+ * The Video Decode and Presentation API for UNIX (VDPAU) is used for
+ * hardware-accelerated decoding of MPEG-1/2, H.264 and VC-1.
+ *
+ * Copyright (C) 2008 NVIDIA
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VDPAU_H
+#define AVCODEC_VDPAU_H
+
+/**
+ * @file
+ * @ingroup lavc_codec_hwaccel_vdpau
+ * Public libavcodec VDPAU header.
+ */
+
+/**
+ * @defgroup lavc_codec_hwaccel_vdpau VDPAU Decoder and Renderer
+ * @ingroup lavc_codec_hwaccel
+ *
+ * VDPAU hardware acceleration has two modules
+ * - VDPAU decoding
+ * - VDPAU presentation
+ *
+ * The VDPAU decoding module parses all headers using FFmpeg
+ * parsing mechanisms and uses VDPAU for the actual decoding.
+ *
+ * As per the current implementation, the actual decoding
+ * and rendering (API calls) are done as part of the VDPAU
+ * presentation (vo_vdpau.c) module.
+ *
+ * @{
+ */
+
+#include <vdpau/vdpau.h>
+
+#include "libavutil/avconfig.h"
+#include "libavutil/attributes.h"
+
+#include "avcodec.h"
+
+struct AVCodecContext;
+struct AVFrame;
+
+typedef int (*AVVDPAU_Render2)(struct AVCodecContext*, struct AVFrame*,
+                               const VdpPictureInfo*, uint32_t,
+                               const VdpBitstreamBuffer*);
+
+/**
+ * This structure is used to share data between the libavcodec library and
+ * the client video application.
+ * This structure will be allocated and stored in AVCodecContext.hwaccel_context
+ * by av_vdpau_bind_context(). Members can be set by the user once
+ * during initialization or through each AVCodecContext.get_buffer()
+ * function call. In any case, they must be valid prior to calling
+ * decoding functions.
+ *
+ * The size of this structure is not a part of the public ABI and must not
+ * be used outside of libavcodec.
+ */
+typedef struct AVVDPAUContext {
+  /**
+   * VDPAU decoder handle
+   *
+   * Set by user.
+   */
+  VdpDecoder decoder;
+
+  /**
+   * VDPAU decoder render callback
+   *
+   * Set by the user.
+   */
+  VdpDecoderRender* render;
+
+  AVVDPAU_Render2 render2;
+} AVVDPAUContext;
+
+#if FF_API_VDPAU_ALLOC_GET_SET
+/**
+ * @brief allocation function for AVVDPAUContext
+ *
+ * Allows extending the struct without breaking API/ABI
+ * @deprecated use av_vdpau_bind_context() instead
+ */
+attribute_deprecated AVVDPAUContext* av_alloc_vdpaucontext(void);
+
+/**
+ * @deprecated render2 is public and can be accessed directly
+ */
+attribute_deprecated AVVDPAU_Render2
+av_vdpau_hwaccel_get_render2(const AVVDPAUContext*);
+/**
+ * @deprecated render2 is public and can be accessed directly
+ */
+attribute_deprecated void av_vdpau_hwaccel_set_render2(AVVDPAUContext*,
+                                                       AVVDPAU_Render2);
+#endif
+
+/**
+ * Associate a VDPAU device with a codec context for hardware acceleration.
+ * This function is meant to be called from the get_format() codec callback,
+ * or earlier. It can also be called after avcodec_flush_buffers() to change
+ * the underlying VDPAU device mid-stream (e.g. to recover from non-transparent
+ * display preemption).
+ *
+ * @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
+ * successfully.
+ *
+ * @param avctx decoding context whose get_format() callback is invoked
+ * @param device VDPAU device handle to use for hardware acceleration
+ * @param get_proc_address VDPAU device driver
+ * @param flags zero of more OR'd AV_HWACCEL_FLAG_* flags
+ *
+ * @return 0 on success, an AVERROR code on failure.
+ */
+int av_vdpau_bind_context(AVCodecContext* avctx, VdpDevice device,
+                          VdpGetProcAddress* get_proc_address, unsigned flags);
+
+/**
+ * Gets the parameters to create an adequate VDPAU video surface for the codec
+ * context using VDPAU hardware decoding acceleration.
+ *
+ * @note Behavior is undefined if the context was not successfully bound to a
+ * VDPAU device using av_vdpau_bind_context().
+ *
+ * @param avctx the codec context being used for decoding the stream
+ * @param type storage space for the VDPAU video surface chroma type
+ *              (or NULL to ignore)
+ * @param width storage space for the VDPAU video surface pixel width
+ *              (or NULL to ignore)
+ * @param height storage space for the VDPAU video surface pixel height
+ *              (or NULL to ignore)
+ *
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_vdpau_get_surface_parameters(AVCodecContext* avctx, VdpChromaType* type,
+                                    uint32_t* width, uint32_t* height);
+
+#if FF_API_VDPAU_ALLOC_GET_SET
+/**
+ * Allocate an AVVDPAUContext.
+ *
+ * @return Newly-allocated AVVDPAUContext or NULL on failure.
+ * @deprecated use av_vdpau_bind_context() instead
+ */
+attribute_deprecated AVVDPAUContext* av_vdpau_alloc_context(void);
+#endif
+
+/** @} */
+
+#endif /* AVCODEC_VDPAU_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version.h
new file mode 100644
index 0000000000..8d91b7db19
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version.h
@@ -0,0 +1,45 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VERSION_H
+#define AVCODEC_VERSION_H
+
+/**
+ * @file
+ * @ingroup libavc
+ * Libavcodec version macros.
+ */
+
+#include "libavutil/version.h"
+
+#include "version_major.h"
+
+#define LIBAVCODEC_VERSION_MINOR 5
+#define LIBAVCODEC_VERSION_MICRO 101
+
+#define LIBAVCODEC_VERSION_INT                                       \
+  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, LIBAVCODEC_VERSION_MINOR, \
+                 LIBAVCODEC_VERSION_MICRO)
+#define LIBAVCODEC_VERSION                                       \
+  AV_VERSION(LIBAVCODEC_VERSION_MAJOR, LIBAVCODEC_VERSION_MINOR, \
+             LIBAVCODEC_VERSION_MICRO)
+#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
+
+#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
+
+#endif /* AVCODEC_VERSION_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version_major.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version_major.h
new file mode 100644
index 0000000000..f987a3dd04
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavcodec/version_major.h
@@ -0,0 +1,52 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VERSION_MAJOR_H
+#define AVCODEC_VERSION_MAJOR_H
+
+/**
+ * @file
+ * @ingroup libavc
+ * Libavcodec version macros.
+ */
+
+#define LIBAVCODEC_VERSION_MAJOR 61
+
+/**
+ * FF_API_* defines may be placed below to indicate public API that will be
+ * dropped at a future version bump. The defines themselves are not part of
+ * the public API and may change, break or disappear at any time.
+ *
+ * @note, when bumping the major version it is recommended to manually
+ * disable each FF_API_* in its own commit instead of disabling them all
+ * at once through the bump. This improves the git bisect-ability of the change.
+ */
+
+#define FF_API_INIT_PACKET (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_SUBFRAMES (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_TICKS_PER_FRAME (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_DROPCHANGED (LIBAVCODEC_VERSION_MAJOR < 62)
+
+#define FF_API_AVFFT (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_FF_PROFILE_LEVEL (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_AVCODEC_CLOSE (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_BUFFER_MIN_SIZE (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_VDPAU_ALLOC_GET_SET (LIBAVCODEC_VERSION_MAJOR < 62)
+#define FF_API_QUALITY_FACTOR (LIBAVCODEC_VERSION_MAJOR < 62)
+
+#endif /* AVCODEC_VERSION_MAJOR_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/attributes.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/attributes.h
new file mode 100644
index 0000000000..774d1fe916
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/attributes.h
@@ -0,0 +1,173 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Macro definitions for various function/variable attributes
+ */
+
+#ifndef AVUTIL_ATTRIBUTES_H
+#define AVUTIL_ATTRIBUTES_H
+
+#ifdef __GNUC__
+#  define AV_GCC_VERSION_AT_LEAST(x, y) \
+    (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
+#  define AV_GCC_VERSION_AT_MOST(x, y) \
+    (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y))
+#else
+#  define AV_GCC_VERSION_AT_LEAST(x, y) 0
+#  define AV_GCC_VERSION_AT_MOST(x, y) 0
+#endif
+
+#ifdef __has_builtin
+#  define AV_HAS_BUILTIN(x) __has_builtin(x)
+#else
+#  define AV_HAS_BUILTIN(x) 0
+#endif
+
+#ifndef av_always_inline
+#  if AV_GCC_VERSION_AT_LEAST(3, 1)
+#    define av_always_inline __attribute__((always_inline)) inline
+#  elif defined(_MSC_VER)
+#    define av_always_inline __forceinline
+#  else
+#    define av_always_inline inline
+#  endif
+#endif
+
+#ifndef av_extern_inline
+#  if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__)
+#    define av_extern_inline extern inline
+#  else
+#    define av_extern_inline inline
+#  endif
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3, 4)
+#  define av_warn_unused_result __attribute__((warn_unused_result))
+#else
+#  define av_warn_unused_result
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3, 1)
+#  define av_noinline __attribute__((noinline))
+#elif defined(_MSC_VER)
+#  define av_noinline __declspec(noinline)
+#else
+#  define av_noinline
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3, 1) || defined(__clang__)
+#  define av_pure __attribute__((pure))
+#else
+#  define av_pure
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2, 6) || defined(__clang__)
+#  define av_const __attribute__((const))
+#else
+#  define av_const
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4, 3) || defined(__clang__)
+#  define av_cold __attribute__((cold))
+#else
+#  define av_cold
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(4, 1) && !defined(__llvm__)
+#  define av_flatten __attribute__((flatten))
+#else
+#  define av_flatten
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3, 1)
+#  define attribute_deprecated __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#  define attribute_deprecated __declspec(deprecated)
+#else
+#  define attribute_deprecated
+#endif
+
+/**
+ * Disable warnings about deprecated features
+ * This is useful for sections of code kept for backward compatibility and
+ * scheduled for removal.
+ */
+#ifndef AV_NOWARN_DEPRECATED
+#  if AV_GCC_VERSION_AT_LEAST(4, 6) || defined(__clang__)
+#    define AV_NOWARN_DEPRECATED(code)                                    \
+      _Pragma("GCC diagnostic push")                                      \
+          _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \
+              code _Pragma("GCC diagnostic pop")
+#  elif defined(_MSC_VER)
+#    define AV_NOWARN_DEPRECATED(code)                                \
+      __pragma(warning(push)) __pragma(warning(disable : 4996)) code; \
+      __pragma(warning(pop))
+#  else
+#    define AV_NOWARN_DEPRECATED(code) code
+#  endif
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#  define av_unused __attribute__((unused))
+#else
+#  define av_unused
+#endif
+
+/**
+ * Mark a variable as used and prevent the compiler from optimizing it
+ * away.  This is useful for variables accessed only from inline
+ * assembler without the compiler being aware.
+ */
+#if AV_GCC_VERSION_AT_LEAST(3, 1) || defined(__clang__)
+#  define av_used __attribute__((used))
+#else
+#  define av_used
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(3, 3) || defined(__clang__)
+#  define av_alias __attribute__((may_alias))
+#else
+#  define av_alias
+#endif
+
+#if (defined(__GNUC__) || defined(__clang__)) && !defined(__INTEL_COMPILER)
+#  define av_uninit(x) x = x
+#else
+#  define av_uninit(x) x
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#  define av_builtin_constant_p __builtin_constant_p
+#  define av_printf_format(fmtpos, attrpos) \
+    __attribute__((__format__(__printf__, fmtpos, attrpos)))
+#else
+#  define av_builtin_constant_p(x) 0
+#  define av_printf_format(fmtpos, attrpos)
+#endif
+
+#if AV_GCC_VERSION_AT_LEAST(2, 5) || defined(__clang__)
+#  define av_noreturn __attribute__((noreturn))
+#else
+#  define av_noreturn
+#endif
+
+#endif /* AVUTIL_ATTRIBUTES_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avconfig.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avconfig.h
new file mode 100644
index 0000000000..c289fbb551
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avconfig.h
@@ -0,0 +1,6 @@
+/* Generated by ffmpeg configure */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+#define AV_HAVE_BIGENDIAN 0
+#define AV_HAVE_FAST_UNALIGNED 1
+#endif /* AVUTIL_AVCONFIG_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avutil.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avutil.h
new file mode 100644
index 0000000000..480a64e852
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/avutil.h
@@ -0,0 +1,363 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVUTIL_H
+#define AVUTIL_AVUTIL_H
+
+/**
+ * @file
+ * @ingroup lavu
+ * Convenience header that includes @ref lavu "libavutil"'s core.
+ */
+
+/**
+ * @mainpage
+ *
+ * @section ffmpeg_intro Introduction
+ *
+ * This document describes the usage of the different libraries
+ * provided by FFmpeg.
+ *
+ * @li @ref libavc "libavcodec" encoding/decoding library
+ * @li @ref lavfi "libavfilter" graph-based frame editing library
+ * @li @ref libavf "libavformat" I/O and muxing/demuxing library
+ * @li @ref lavd "libavdevice" special devices muxing/demuxing library
+ * @li @ref lavu "libavutil" common utility library
+ * @li @ref lswr "libswresample" audio resampling, format conversion and mixing
+ * @li @ref lpp  "libpostproc" post processing library
+ * @li @ref libsws "libswscale" color conversion and scaling library
+ *
+ * @section ffmpeg_versioning Versioning and compatibility
+ *
+ * Each of the FFmpeg libraries contains a version.h header, which defines a
+ * major, minor and micro version number with the
+ * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
+ * number is incremented with backward incompatible changes - e.g. removing
+ * parts of the public API, reordering public struct members, etc. The minor
+ * version number is incremented for backward compatible API changes or major
+ * new features - e.g. adding a new public function or a new decoder. The micro
+ * version number is incremented for smaller changes that a calling program
+ * might still want to check for - e.g. changing behavior in a previously
+ * unspecified situation.
+ *
+ * FFmpeg guarantees backward API and ABI compatibility for each library as long
+ * as its major version number is unchanged. This means that no public symbols
+ * will be removed or renamed. Types and names of the public struct members and
+ * values of public macros and enums will remain the same (unless they were
+ * explicitly declared as not part of the public API). Documented behavior will
+ * not change.
+ *
+ * In other words, any correct program that works with a given FFmpeg snapshot
+ * should work just as well without any changes with any later snapshot with the
+ * same major versions. This applies to both rebuilding the program against new
+ * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
+ * links against.
+ *
+ * However, new public symbols may be added and new members may be appended to
+ * public structs whose size is not part of public ABI (most public structs in
+ * FFmpeg). New macros and enum values may be added. Behavior in undocumented
+ * situations may change slightly (and be documented). All those are accompanied
+ * by an entry in doc/APIchanges and incrementing either the minor or micro
+ * version number.
+ */
+
+/**
+ * @defgroup lavu libavutil
+ * Common code shared across all FFmpeg libraries.
+ *
+ * @note
+ * libavutil is designed to be modular. In most cases, in order to use the
+ * functions provided by one component of libavutil you must explicitly include
+ * the specific header containing that feature. If you are only using
+ * media-related components, you could simply include libavutil/avutil.h, which
+ * brings in most of the "core" components.
+ *
+ * @{
+ *
+ * @defgroup lavu_crypto Crypto and Hashing
+ *
+ * @{
+ * @}
+ *
+ * @defgroup lavu_math Mathematics
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_string String Manipulation
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_mem Memory Management
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_data Data Structures
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_video Video related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_audio Audio related
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_error Error Codes
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_log Logging Facility
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup lavu_misc Other
+ *
+ * @{
+ *
+ * @defgroup preproc_misc Preprocessor String Macros
+ *
+ * @{
+ *
+ * @}
+ *
+ * @defgroup version_utils Library Version Macros
+ *
+ * @{
+ *
+ * @}
+ */
+
+/**
+ * @addtogroup lavu_ver
+ * @{
+ */
+
+/**
+ * Return the LIBAVUTIL_VERSION_INT constant.
+ */
+unsigned avutil_version(void);
+
+/**
+ * Return an informative version string. This usually is the actual release
+ * version number or a git commit description. This string has no fixed format
+ * and can change any time. It should never be parsed by code.
+ */
+const char* av_version_info(void);
+
+/**
+ * Return the libavutil build-time configuration.
+ */
+const char* avutil_configuration(void);
+
+/**
+ * Return the libavutil license.
+ */
+const char* avutil_license(void);
+
+/**
+ * @}
+ */
+
+/**
+ * @addtogroup lavu_media Media Type
+ * @brief Media Type
+ */
+
+enum AVMediaType {
+  AVMEDIA_TYPE_UNKNOWN = -1,  ///< Usually treated as AVMEDIA_TYPE_DATA
+  AVMEDIA_TYPE_VIDEO,
+  AVMEDIA_TYPE_AUDIO,
+  AVMEDIA_TYPE_DATA,  ///< Opaque data information usually continuous
+  AVMEDIA_TYPE_SUBTITLE,
+  AVMEDIA_TYPE_ATTACHMENT,  ///< Opaque data information usually sparse
+  AVMEDIA_TYPE_NB
+};
+
+/**
+ * Return a string describing the media_type enum, NULL if media_type
+ * is unknown.
+ */
+const char* av_get_media_type_string(enum AVMediaType media_type);
+
+/**
+ * @defgroup lavu_const Constants
+ * @{
+ *
+ * @defgroup lavu_enc Encoding specific
+ *
+ * @note those definition should move to avcodec
+ * @{
+ */
+
+#define FF_LAMBDA_SHIFT 7
+#define FF_LAMBDA_SCALE (1 << FF_LAMBDA_SHIFT)
+#define FF_QP2LAMBDA 118  ///< factor to convert from H.263 QP to lambda
+#define FF_LAMBDA_MAX (256 * 128 - 1)
+
+#define FF_QUALITY_SCALE FF_LAMBDA_SCALE  // FIXME maybe remove
+
+/**
+ * @}
+ * @defgroup lavu_time Timestamp specific
+ *
+ * FFmpeg internal timebase and timestamp definitions
+ *
+ * @{
+ */
+
+/**
+ * @brief Undefined timestamp value
+ *
+ * Usually reported by demuxer that work on containers that do not provide
+ * either pts or dts.
+ */
+
+#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))
+
+/**
+ * Internal time base represented as integer
+ */
+
+#define AV_TIME_BASE 1000000
+
+/**
+ * Internal time base represented as fractional value
+ */
+
+#ifdef __cplusplus
+/* ISO C++ forbids compound-literals. */
+#  define AV_TIME_BASE_Q av_make_q(1, AV_TIME_BASE)
+#else
+#  define AV_TIME_BASE_Q \
+    (AVRational) { 1, AV_TIME_BASE }
+#endif
+
+/**
+ * @}
+ * @}
+ * @defgroup lavu_picture Image related
+ *
+ * AVPicture types, pixel formats and basic image planes manipulation.
+ *
+ * @{
+ */
+
+enum AVPictureType {
+  AV_PICTURE_TYPE_NONE = 0,  ///< Undefined
+  AV_PICTURE_TYPE_I,         ///< Intra
+  AV_PICTURE_TYPE_P,         ///< Predicted
+  AV_PICTURE_TYPE_B,         ///< Bi-dir predicted
+  AV_PICTURE_TYPE_S,         ///< S(GMC)-VOP MPEG-4
+  AV_PICTURE_TYPE_SI,        ///< Switching Intra
+  AV_PICTURE_TYPE_SP,        ///< Switching Predicted
+  AV_PICTURE_TYPE_BI,        ///< BI type
+};
+
+/**
+ * Return a single letter to describe the given picture type
+ * pict_type.
+ *
+ * @param[in] pict_type the picture type @return a single character
+ * representing the picture type, '?' if pict_type is unknown
+ */
+char av_get_picture_type_char(enum AVPictureType pict_type);
+
+/**
+ * @}
+ */
+
+#include "common.h"
+#include "rational.h"
+#include "version.h"
+#include "macros.h"
+#include "mathematics.h"
+#include "log.h"
+#include "pixfmt.h"
+
+/**
+ * Return x default pointer in case p is NULL.
+ */
+static inline void* av_x_if_null(const void* p, const void* x) {
+  return (void*)(intptr_t)(p ? p : x);
+}
+
+/**
+ * Compute the length of an integer list.
+ *
+ * @param elsize  size in bytes of each list element (only 1, 2, 4 or 8)
+ * @param term    list terminator (usually 0 or -1)
+ * @param list    pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+unsigned av_int_list_length_for_size(unsigned elsize, const void* list,
+                                     uint64_t term) av_pure;
+
+/**
+ * Compute the length of an integer list.
+ *
+ * @param term  list terminator (usually 0 or -1)
+ * @param list  pointer to the list
+ * @return  length of the list, in elements, not counting the terminator
+ */
+#define av_int_list_length(list, term) \
+  av_int_list_length_for_size(sizeof(*(list)), list, term)
+
+/**
+ * Return the fractional representation of the internal time base.
+ */
+AVRational av_get_time_base_q(void);
+
+#define AV_FOURCC_MAX_STRING_SIZE 32
+
+#define av_fourcc2str(fourcc) \
+  av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)
+
+/**
+ * Fill the provided buffer with a string containing a FourCC (four-character
+ * code) representation.
+ *
+ * @param buf    a buffer with size in bytes of at least
+ * AV_FOURCC_MAX_STRING_SIZE
+ * @param fourcc the fourcc to represent
+ * @return the buffer in input
+ */
+char* av_fourcc_make_string(char* buf, uint32_t fourcc);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_AVUTIL_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/buffer.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/buffer.h
new file mode 100644
index 0000000000..372de093f9
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/buffer.h
@@ -0,0 +1,324 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_buffer
+ * refcounted data buffer API
+ */
+
+#ifndef AVUTIL_BUFFER_H
+#define AVUTIL_BUFFER_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @defgroup lavu_buffer AVBuffer
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBuffer is an API for reference-counted data buffers.
+ *
+ * There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer
+ * represents the data buffer itself; it is opaque and not meant to be accessed
+ * by the caller directly, but only through AVBufferRef. However, the caller may
+ * e.g. compare two AVBuffer pointers to check whether two different references
+ * are describing the same data buffer. AVBufferRef represents a single
+ * reference to an AVBuffer and it is the object that may be manipulated by the
+ * caller directly.
+ *
+ * There are two functions provided for creating a new AVBuffer with a single
+ * reference -- av_buffer_alloc() to just allocate a new buffer, and
+ * av_buffer_create() to wrap an existing array in an AVBuffer. From an existing
+ * reference, additional references may be created with av_buffer_ref().
+ * Use av_buffer_unref() to free a reference (this will automatically free the
+ * data once all the references are freed).
+ *
+ * The convention throughout this API and the rest of FFmpeg is such that the
+ * buffer is considered writable if there exists only one reference to it (and
+ * it has not been marked as read-only). The av_buffer_is_writable() function is
+ * provided to check whether this is true and av_buffer_make_writable() will
+ * automatically create a new writable buffer when necessary.
+ * Of course nothing prevents the calling code from violating this convention,
+ * however that is safe only when all the existing references are under its
+ * control.
+ *
+ * @note Referencing and unreferencing the buffers is thread-safe and thus
+ * may be done from multiple threads simultaneously without any need for
+ * additional locking.
+ *
+ * @note Two different references to the same buffer can point to different
+ * parts of the buffer (i.e. their AVBufferRef.data will not be equal).
+ */
+
+/**
+ * A reference counted buffer type. It is opaque and is meant to be used through
+ * references (AVBufferRef).
+ */
+typedef struct AVBuffer AVBuffer;
+
+/**
+ * A reference to a data buffer.
+ *
+ * The size of this struct is not a part of the public ABI and it is not meant
+ * to be allocated directly.
+ */
+typedef struct AVBufferRef {
+  AVBuffer* buffer;
+
+  /**
+   * The data buffer. It is considered writable if and only if
+   * this is the only reference to the buffer, in which case
+   * av_buffer_is_writable() returns 1.
+   */
+  uint8_t* data;
+  /**
+   * Size of data in bytes.
+   */
+  size_t size;
+} AVBufferRef;
+
+/**
+ * Allocate an AVBuffer of the given size using av_malloc().
+ *
+ * @return an AVBufferRef of given size or NULL when out of memory
+ */
+AVBufferRef* av_buffer_alloc(size_t size);
+
+/**
+ * Same as av_buffer_alloc(), except the returned buffer will be initialized
+ * to zero.
+ */
+AVBufferRef* av_buffer_allocz(size_t size);
+
+/**
+ * Always treat the buffer as read-only, even when it has only one
+ * reference.
+ */
+#define AV_BUFFER_FLAG_READONLY (1 << 0)
+
+/**
+ * Create an AVBuffer from an existing array.
+ *
+ * If this function is successful, data is owned by the AVBuffer. The caller may
+ * only access data through the returned AVBufferRef and references derived from
+ * it.
+ * If this function fails, data is left untouched.
+ * @param data   data array
+ * @param size   size of data in bytes
+ * @param free   a callback for freeing this buffer's data
+ * @param opaque parameter to be got for processing or passed to free
+ * @param flags  a combination of AV_BUFFER_FLAG_*
+ *
+ * @return an AVBufferRef referring to data on success, NULL on failure.
+ */
+AVBufferRef* av_buffer_create(uint8_t* data, size_t size,
+                              void (*free)(void* opaque, uint8_t* data),
+                              void* opaque, int flags);
+
+/**
+ * Default free callback, which calls av_free() on the buffer data.
+ * This function is meant to be passed to av_buffer_create(), not called
+ * directly.
+ */
+void av_buffer_default_free(void* opaque, uint8_t* data);
+
+/**
+ * Create a new reference to an AVBuffer.
+ *
+ * @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on
+ * failure.
+ */
+AVBufferRef* av_buffer_ref(const AVBufferRef* buf);
+
+/**
+ * Free a given reference and automatically free the buffer if there are no more
+ * references to it.
+ *
+ * @param buf the reference to be freed. The pointer is set to NULL on return.
+ */
+void av_buffer_unref(AVBufferRef** buf);
+
+/**
+ * @return 1 if the caller may write to the data referred to by buf (which is
+ * true if and only if buf is the only reference to the underlying AVBuffer).
+ * Return 0 otherwise.
+ * A positive answer is valid until av_buffer_ref() is called on buf.
+ */
+int av_buffer_is_writable(const AVBufferRef* buf);
+
+/**
+ * @return the opaque parameter set by av_buffer_create.
+ */
+void* av_buffer_get_opaque(const AVBufferRef* buf);
+
+int av_buffer_get_ref_count(const AVBufferRef* buf);
+
+/**
+ * Create a writable reference from a given buffer reference, avoiding data copy
+ * if possible.
+ *
+ * @param buf buffer reference to make writable. On success, buf is either left
+ *            untouched, or it is unreferenced and a new writable AVBufferRef is
+ *            written in its place. On failure, buf is left untouched.
+ * @return 0 on success, a negative AVERROR on failure.
+ */
+int av_buffer_make_writable(AVBufferRef** buf);
+
+/**
+ * Reallocate a given buffer.
+ *
+ * @param buf  a buffer reference to reallocate. On success, buf will be
+ *             unreferenced and a new reference with the required size will be
+ *             written in its place. On failure buf will be left untouched. *buf
+ *             may be NULL, then a new buffer is allocated.
+ * @param size required new buffer size.
+ * @return 0 on success, a negative AVERROR on failure.
+ *
+ * @note the buffer is actually reallocated with av_realloc() only if it was
+ * initially allocated through av_buffer_realloc(NULL) and there is only one
+ * reference to it (i.e. the one passed to this function). In all other cases
+ * a new buffer is allocated and the data is copied.
+ */
+int av_buffer_realloc(AVBufferRef** buf, size_t size);
+
+/**
+ * Ensure dst refers to the same data as src.
+ *
+ * When *dst is already equivalent to src, do nothing. Otherwise unreference dst
+ * and replace it with a new reference to src.
+ *
+ * @param dst Pointer to either a valid buffer reference or NULL. On success,
+ *            this will point to a buffer reference equivalent to src. On
+ *            failure, dst will be left untouched.
+ * @param src A buffer reference to replace dst with. May be NULL, then this
+ *            function is equivalent to av_buffer_unref(dst).
+ * @return 0 on success
+ *         AVERROR(ENOMEM) on memory allocation failure.
+ */
+int av_buffer_replace(AVBufferRef** dst, const AVBufferRef* src);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_bufferpool AVBufferPool
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers.
+ *
+ * Frequently allocating and freeing large buffers may be slow. AVBufferPool is
+ * meant to solve this in cases when the caller needs a set of buffers of the
+ * same size (the most obvious use case being buffers for raw video or audio
+ * frames).
+ *
+ * At the beginning, the user must call av_buffer_pool_init() to create the
+ * buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to
+ * get a reference to a new buffer, similar to av_buffer_alloc(). This new
+ * reference works in all aspects the same way as the one created by
+ * av_buffer_alloc(). However, when the last reference to this buffer is
+ * unreferenced, it is returned to the pool instead of being freed and will be
+ * reused for subsequent av_buffer_pool_get() calls.
+ *
+ * When the caller is done with the pool and no longer needs to allocate any new
+ * buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable.
+ * Once all the buffers are released, it will automatically be freed.
+ *
+ * Allocating and releasing buffers with this API is thread-safe as long as
+ * either the default alloc callback is used, or the user-supplied one is
+ * thread-safe.
+ */
+
+/**
+ * The buffer pool. This structure is opaque and not meant to be accessed
+ * directly. It is allocated with av_buffer_pool_init() and freed with
+ * av_buffer_pool_uninit().
+ */
+typedef struct AVBufferPool AVBufferPool;
+
+/**
+ * Allocate and initialize a buffer pool.
+ *
+ * @param size size of each buffer in this pool
+ * @param alloc a function that will be used to allocate new buffers when the
+ * pool is empty. May be NULL, then the default allocator will be used
+ * (av_buffer_alloc()).
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool* av_buffer_pool_init(size_t size,
+                                  AVBufferRef* (*alloc)(size_t size));
+
+/**
+ * Allocate and initialize a buffer pool with a more complex allocator.
+ *
+ * @param size size of each buffer in this pool
+ * @param opaque arbitrary user data used by the allocator
+ * @param alloc a function that will be used to allocate new buffers when the
+ *              pool is empty. May be NULL, then the default allocator will be
+ *              used (av_buffer_alloc()).
+ * @param pool_free a function that will be called immediately before the pool
+ *                  is freed. I.e. after av_buffer_pool_uninit() is called
+ *                  by the caller and all the frames are returned to the pool
+ *                  and freed. It is intended to uninitialize the user opaque
+ *                  data. May be NULL.
+ * @return newly created buffer pool on success, NULL on error.
+ */
+AVBufferPool* av_buffer_pool_init2(size_t size, void* opaque,
+                                   AVBufferRef* (*alloc)(void* opaque,
+                                                         size_t size),
+                                   void (*pool_free)(void* opaque));
+
+/**
+ * Mark the pool as being available for freeing. It will actually be freed only
+ * once all the allocated buffers associated with the pool are released. Thus it
+ * is safe to call this function while some of the allocated buffers are still
+ * in use.
+ *
+ * @param pool pointer to the pool to be freed. It will be set to NULL.
+ */
+void av_buffer_pool_uninit(AVBufferPool** pool);
+
+/**
+ * Allocate a new AVBuffer, reusing an old buffer from the pool when available.
+ * This function may be called simultaneously from multiple threads.
+ *
+ * @return a reference to the new buffer on success, NULL on error.
+ */
+AVBufferRef* av_buffer_pool_get(AVBufferPool* pool);
+
+/**
+ * Query the original opaque parameter of an allocated buffer in the pool.
+ *
+ * @param ref a buffer reference to a buffer returned by av_buffer_pool_get.
+ * @return the opaque parameter set by the buffer allocator function of the
+ *         buffer pool.
+ *
+ * @note the opaque parameter of ref is used by the buffer pool implementation,
+ * therefore you have to use this function to access the original opaque
+ * parameter of an allocated buffer.
+ */
+void* av_buffer_pool_buffer_get_opaque(const AVBufferRef* ref);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_BUFFER_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/channel_layout.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/channel_layout.h
new file mode 100644
index 0000000000..df0abca669
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/channel_layout.h
@@ -0,0 +1,804 @@
+/*
+ * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ * Copyright (c) 2008 Peter Ross
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CHANNEL_LAYOUT_H
+#define AVUTIL_CHANNEL_LAYOUT_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "version.h"
+#include "attributes.h"
+
+/**
+ * @file
+ * @ingroup lavu_audio_channels
+ * Public libavutil channel layout APIs header.
+ */
+
+/**
+ * @defgroup lavu_audio_channels Audio channels
+ * @ingroup lavu_audio
+ *
+ * Audio channel layout utility functions
+ *
+ * @{
+ */
+
+enum AVChannel {
+  ///< Invalid channel index
+  AV_CHAN_NONE = -1,
+  AV_CHAN_FRONT_LEFT,
+  AV_CHAN_FRONT_RIGHT,
+  AV_CHAN_FRONT_CENTER,
+  AV_CHAN_LOW_FREQUENCY,
+  AV_CHAN_BACK_LEFT,
+  AV_CHAN_BACK_RIGHT,
+  AV_CHAN_FRONT_LEFT_OF_CENTER,
+  AV_CHAN_FRONT_RIGHT_OF_CENTER,
+  AV_CHAN_BACK_CENTER,
+  AV_CHAN_SIDE_LEFT,
+  AV_CHAN_SIDE_RIGHT,
+  AV_CHAN_TOP_CENTER,
+  AV_CHAN_TOP_FRONT_LEFT,
+  AV_CHAN_TOP_FRONT_CENTER,
+  AV_CHAN_TOP_FRONT_RIGHT,
+  AV_CHAN_TOP_BACK_LEFT,
+  AV_CHAN_TOP_BACK_CENTER,
+  AV_CHAN_TOP_BACK_RIGHT,
+  /** Stereo downmix. */
+  AV_CHAN_STEREO_LEFT = 29,
+  /** See above. */
+  AV_CHAN_STEREO_RIGHT,
+  AV_CHAN_WIDE_LEFT,
+  AV_CHAN_WIDE_RIGHT,
+  AV_CHAN_SURROUND_DIRECT_LEFT,
+  AV_CHAN_SURROUND_DIRECT_RIGHT,
+  AV_CHAN_LOW_FREQUENCY_2,
+  AV_CHAN_TOP_SIDE_LEFT,
+  AV_CHAN_TOP_SIDE_RIGHT,
+  AV_CHAN_BOTTOM_FRONT_CENTER,
+  AV_CHAN_BOTTOM_FRONT_LEFT,
+  AV_CHAN_BOTTOM_FRONT_RIGHT,
+
+  /** Channel is empty can be safely skipped. */
+  AV_CHAN_UNUSED = 0x200,
+
+  /** Channel contains data, but its position is unknown. */
+  AV_CHAN_UNKNOWN = 0x300,
+
+  /**
+   * Range of channels between AV_CHAN_AMBISONIC_BASE and
+   * AV_CHAN_AMBISONIC_END represent Ambisonic components using the ACN system.
+   *
+   * Given a channel id `<i>` between AV_CHAN_AMBISONIC_BASE and
+   * AV_CHAN_AMBISONIC_END (inclusive), the ACN index of the channel `<n>` is
+   * `<n> = <i> - AV_CHAN_AMBISONIC_BASE`.
+   *
+   * @note these values are only used for AV_CHANNEL_ORDER_CUSTOM channel
+   * orderings, the AV_CHANNEL_ORDER_AMBISONIC ordering orders the channels
+   * implicitly by their position in the stream.
+   */
+  AV_CHAN_AMBISONIC_BASE = 0x400,
+  // leave space for 1024 ids, which correspond to maximum order-32 harmonics,
+  // which should be enough for the foreseeable use cases
+  AV_CHAN_AMBISONIC_END = 0x7ff,
+};
+
+enum AVChannelOrder {
+  /**
+   * Only the channel count is specified, without any further information
+   * about the channel order.
+   */
+  AV_CHANNEL_ORDER_UNSPEC,
+  /**
+   * The native channel order, i.e. the channels are in the same order in
+   * which they are defined in the AVChannel enum. This supports up to 63
+   * different channels.
+   */
+  AV_CHANNEL_ORDER_NATIVE,
+  /**
+   * The channel order does not correspond to any other predefined order and
+   * is stored as an explicit map. For example, this could be used to support
+   * layouts with 64 or more channels, or with empty/skipped (AV_CHAN_UNUSED)
+   * channels at arbitrary positions.
+   */
+  AV_CHANNEL_ORDER_CUSTOM,
+  /**
+   * The audio is represented as the decomposition of the sound field into
+   * spherical harmonics. Each channel corresponds to a single expansion
+   * component. Channels are ordered according to ACN (Ambisonic Channel
+   * Number).
+   *
+   * The channel with the index n in the stream contains the spherical
+   * harmonic of degree l and order m given by
+   * @code{.unparsed}
+   *   l   = floor(sqrt(n)),
+   *   m   = n - l * (l + 1).
+   * @endcode
+   *
+   * Conversely given a spherical harmonic of degree l and order m, the
+   * corresponding channel index n is given by
+   * @code{.unparsed}
+   *   n = l * (l + 1) + m.
+   * @endcode
+   *
+   * Normalization is assumed to be SN3D (Schmidt Semi-Normalization)
+   * as defined in AmbiX format $ 2.1.
+   */
+  AV_CHANNEL_ORDER_AMBISONIC,
+  /**
+   * Number of channel orders, not part of ABI/API
+   */
+  FF_CHANNEL_ORDER_NB
+};
+
+/**
+ * @defgroup channel_masks Audio channel masks
+ *
+ * A channel layout is a 64-bits integer with a bit set for every channel.
+ * The number of bits set must be equal to the number of channels.
+ * The value 0 means that the channel layout is not known.
+ * @note this data structure is not powerful enough to handle channels
+ * combinations that have the same channel multiple times, such as
+ * dual-mono.
+ *
+ * @{
+ */
+#define AV_CH_FRONT_LEFT (1ULL << AV_CHAN_FRONT_LEFT)
+#define AV_CH_FRONT_RIGHT (1ULL << AV_CHAN_FRONT_RIGHT)
+#define AV_CH_FRONT_CENTER (1ULL << AV_CHAN_FRONT_CENTER)
+#define AV_CH_LOW_FREQUENCY (1ULL << AV_CHAN_LOW_FREQUENCY)
+#define AV_CH_BACK_LEFT (1ULL << AV_CHAN_BACK_LEFT)
+#define AV_CH_BACK_RIGHT (1ULL << AV_CHAN_BACK_RIGHT)
+#define AV_CH_FRONT_LEFT_OF_CENTER (1ULL << AV_CHAN_FRONT_LEFT_OF_CENTER)
+#define AV_CH_FRONT_RIGHT_OF_CENTER (1ULL << AV_CHAN_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_BACK_CENTER (1ULL << AV_CHAN_BACK_CENTER)
+#define AV_CH_SIDE_LEFT (1ULL << AV_CHAN_SIDE_LEFT)
+#define AV_CH_SIDE_RIGHT (1ULL << AV_CHAN_SIDE_RIGHT)
+#define AV_CH_TOP_CENTER (1ULL << AV_CHAN_TOP_CENTER)
+#define AV_CH_TOP_FRONT_LEFT (1ULL << AV_CHAN_TOP_FRONT_LEFT)
+#define AV_CH_TOP_FRONT_CENTER (1ULL << AV_CHAN_TOP_FRONT_CENTER)
+#define AV_CH_TOP_FRONT_RIGHT (1ULL << AV_CHAN_TOP_FRONT_RIGHT)
+#define AV_CH_TOP_BACK_LEFT (1ULL << AV_CHAN_TOP_BACK_LEFT)
+#define AV_CH_TOP_BACK_CENTER (1ULL << AV_CHAN_TOP_BACK_CENTER)
+#define AV_CH_TOP_BACK_RIGHT (1ULL << AV_CHAN_TOP_BACK_RIGHT)
+#define AV_CH_STEREO_LEFT (1ULL << AV_CHAN_STEREO_LEFT)
+#define AV_CH_STEREO_RIGHT (1ULL << AV_CHAN_STEREO_RIGHT)
+#define AV_CH_WIDE_LEFT (1ULL << AV_CHAN_WIDE_LEFT)
+#define AV_CH_WIDE_RIGHT (1ULL << AV_CHAN_WIDE_RIGHT)
+#define AV_CH_SURROUND_DIRECT_LEFT (1ULL << AV_CHAN_SURROUND_DIRECT_LEFT)
+#define AV_CH_SURROUND_DIRECT_RIGHT (1ULL << AV_CHAN_SURROUND_DIRECT_RIGHT)
+#define AV_CH_LOW_FREQUENCY_2 (1ULL << AV_CHAN_LOW_FREQUENCY_2)
+#define AV_CH_TOP_SIDE_LEFT (1ULL << AV_CHAN_TOP_SIDE_LEFT)
+#define AV_CH_TOP_SIDE_RIGHT (1ULL << AV_CHAN_TOP_SIDE_RIGHT)
+#define AV_CH_BOTTOM_FRONT_CENTER (1ULL << AV_CHAN_BOTTOM_FRONT_CENTER)
+#define AV_CH_BOTTOM_FRONT_LEFT (1ULL << AV_CHAN_BOTTOM_FRONT_LEFT)
+#define AV_CH_BOTTOM_FRONT_RIGHT (1ULL << AV_CHAN_BOTTOM_FRONT_RIGHT)
+
+/**
+ * @}
+ * @defgroup channel_mask_c Audio channel layouts
+ * @{
+ * */
+#define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT)
+#define AV_CH_LAYOUT_2POINT1 (AV_CH_LAYOUT_STEREO | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER)
+#define AV_CH_LAYOUT_3POINT1 (AV_CH_LAYOUT_SURROUND | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_4POINT1 (AV_CH_LAYOUT_4POINT0 | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_2_2 \
+  (AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_QUAD \
+  (AV_CH_LAYOUT_STEREO | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT0 \
+  (AV_CH_LAYOUT_SURROUND | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT)
+#define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0 | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_5POINT0_BACK \
+  (AV_CH_LAYOUT_SURROUND | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1_BACK \
+  (AV_CH_LAYOUT_5POINT0_BACK | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_6POINT0 (AV_CH_LAYOUT_5POINT0 | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT0_FRONT \
+  (AV_CH_LAYOUT_2_2 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_HEXAGONAL (AV_CH_LAYOUT_5POINT0_BACK | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_3POINT1POINT2 \
+  (AV_CH_LAYOUT_3POINT1 | AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_6POINT1 (AV_CH_LAYOUT_5POINT1 | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_BACK \
+  (AV_CH_LAYOUT_5POINT1_BACK | AV_CH_BACK_CENTER)
+#define AV_CH_LAYOUT_6POINT1_FRONT \
+  (AV_CH_LAYOUT_6POINT0_FRONT | AV_CH_LOW_FREQUENCY)
+#define AV_CH_LAYOUT_7POINT0 \
+  (AV_CH_LAYOUT_5POINT0 | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT0_FRONT                     \
+  (AV_CH_LAYOUT_5POINT0 | AV_CH_FRONT_LEFT_OF_CENTER | \
+   AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1 \
+  (AV_CH_LAYOUT_5POINT1 | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1_WIDE                      \
+  (AV_CH_LAYOUT_5POINT1 | AV_CH_FRONT_LEFT_OF_CENTER | \
+   AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_7POINT1_WIDE_BACK                      \
+  (AV_CH_LAYOUT_5POINT1_BACK | AV_CH_FRONT_LEFT_OF_CENTER | \
+   AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_5POINT1POINT2_BACK \
+  (AV_CH_LAYOUT_5POINT1_BACK | AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_OCTAGONAL                                  \
+  (AV_CH_LAYOUT_5POINT0 | AV_CH_BACK_LEFT | AV_CH_BACK_CENTER | \
+   AV_CH_BACK_RIGHT)
+#define AV_CH_LAYOUT_CUBE                                             \
+  (AV_CH_LAYOUT_QUAD | AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT | \
+   AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_5POINT1POINT4_BACK \
+  (AV_CH_LAYOUT_5POINT1POINT2_BACK | AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT2 \
+  (AV_CH_LAYOUT_7POINT1 | AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_7POINT1POINT4_BACK \
+  (AV_CH_LAYOUT_7POINT1POINT2 | AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT)
+#define AV_CH_LAYOUT_7POINT2POINT3 \
+  (AV_CH_LAYOUT_7POINT1POINT2 | AV_CH_TOP_BACK_CENTER | AV_CH_LOW_FREQUENCY_2)
+#define AV_CH_LAYOUT_9POINT1POINT4_BACK                           \
+  (AV_CH_LAYOUT_7POINT1POINT4_BACK | AV_CH_FRONT_LEFT_OF_CENTER | \
+   AV_CH_FRONT_RIGHT_OF_CENTER)
+#define AV_CH_LAYOUT_HEXADECAGONAL                                      \
+  (AV_CH_LAYOUT_OCTAGONAL | AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT |        \
+   AV_CH_TOP_BACK_LEFT | AV_CH_TOP_BACK_RIGHT | AV_CH_TOP_BACK_CENTER | \
+   AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_FRONT_LEFT | AV_CH_TOP_FRONT_RIGHT)
+#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT)
+#define AV_CH_LAYOUT_22POINT2                                                 \
+  (AV_CH_LAYOUT_7POINT1POINT4_BACK | AV_CH_FRONT_LEFT_OF_CENTER |             \
+   AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_BACK_CENTER | AV_CH_LOW_FREQUENCY_2 |  \
+   AV_CH_TOP_FRONT_CENTER | AV_CH_TOP_CENTER | AV_CH_TOP_SIDE_LEFT |          \
+   AV_CH_TOP_SIDE_RIGHT | AV_CH_TOP_BACK_CENTER | AV_CH_BOTTOM_FRONT_CENTER | \
+   AV_CH_BOTTOM_FRONT_LEFT | AV_CH_BOTTOM_FRONT_RIGHT)
+
+#define AV_CH_LAYOUT_7POINT1_TOP_BACK AV_CH_LAYOUT_5POINT1POINT2_BACK
+
+enum AVMatrixEncoding {
+  AV_MATRIX_ENCODING_NONE,
+  AV_MATRIX_ENCODING_DOLBY,
+  AV_MATRIX_ENCODING_DPLII,
+  AV_MATRIX_ENCODING_DPLIIX,
+  AV_MATRIX_ENCODING_DPLIIZ,
+  AV_MATRIX_ENCODING_DOLBYEX,
+  AV_MATRIX_ENCODING_DOLBYHEADPHONE,
+  AV_MATRIX_ENCODING_NB
+};
+
+/**
+ * @}
+ */
+
+/**
+ * An AVChannelCustom defines a single channel within a custom order layout
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelCustom) is a part of the
+ * public ABI.
+ *
+ * No new fields may be added to it without a major version bump.
+ */
+typedef struct AVChannelCustom {
+  enum AVChannel id;
+  char name[16];
+  void* opaque;
+} AVChannelCustom;
+
+/**
+ * An AVChannelLayout holds information about the channel layout of audio data.
+ *
+ * A channel layout here is defined as a set of channels ordered in a specific
+ * way (unless the channel order is AV_CHANNEL_ORDER_UNSPEC, in which case an
+ * AVChannelLayout carries only the channel count).
+ * All orders may be treated as if they were AV_CHANNEL_ORDER_UNSPEC by
+ * ignoring everything but the channel count, as long as
+ * av_channel_layout_check() considers they are valid.
+ *
+ * Unlike most structures in FFmpeg, sizeof(AVChannelLayout) is a part of the
+ * public ABI and may be used by the caller. E.g. it may be allocated on stack
+ * or embedded in caller-defined structs.
+ *
+ * AVChannelLayout can be initialized as follows:
+ * - default initialization with {0}, followed by setting all used fields
+ *   correctly;
+ * - by assigning one of the predefined AV_CHANNEL_LAYOUT_* initializers;
+ * - with a constructor function, such as av_channel_layout_default(),
+ *   av_channel_layout_from_mask() or av_channel_layout_from_string().
+ *
+ * The channel layout must be unitialized with av_channel_layout_uninit()
+ *
+ * Copying an AVChannelLayout via assigning is forbidden,
+ * av_channel_layout_copy() must be used instead (and its return value should
+ * be checked)
+ *
+ * No new fields may be added to it without a major version bump, except for
+ * new elements of the union fitting in sizeof(uint64_t).
+ */
+typedef struct AVChannelLayout {
+  /**
+   * Channel order used in this layout.
+   * This is a mandatory field.
+   */
+  enum AVChannelOrder order;
+
+  /**
+   * Number of channels in this layout. Mandatory field.
+   */
+  int nb_channels;
+
+  /**
+   * Details about which channels are present in this layout.
+   * For AV_CHANNEL_ORDER_UNSPEC, this field is undefined and must not be
+   * used.
+   */
+  union {
+    /**
+     * This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used
+     * for AV_CHANNEL_ORDER_AMBISONIC to signal non-diegetic channels.
+     * It is a bitmask, where the position of each set bit means that the
+     * AVChannel with the corresponding value is present.
+     *
+     * I.e. when (mask & (1 << AV_CHAN_FOO)) is non-zero, then AV_CHAN_FOO
+     * is present in the layout. Otherwise it is not present.
+     *
+     * @note when a channel layout using a bitmask is constructed or
+     * modified manually (i.e.  not using any of the av_channel_layout_*
+     * functions), the code doing it must ensure that the number of set bits
+     * is equal to nb_channels.
+     */
+    uint64_t mask;
+    /**
+     * This member must be used when the channel order is
+     * AV_CHANNEL_ORDER_CUSTOM. It is a nb_channels-sized array, with each
+     * element signalling the presence of the AVChannel with the
+     * corresponding value in map[i].id.
+     *
+     * I.e. when map[i].id is equal to AV_CHAN_FOO, then AV_CH_FOO is the
+     * i-th channel in the audio data.
+     *
+     * When map[i].id is in the range between AV_CHAN_AMBISONIC_BASE and
+     * AV_CHAN_AMBISONIC_END (inclusive), the channel contains an ambisonic
+     * component with ACN index (as defined above)
+     * n = map[i].id - AV_CHAN_AMBISONIC_BASE.
+     *
+     * map[i].name may be filled with a 0-terminated string, in which case
+     * it will be used for the purpose of identifying the channel with the
+     * convenience functions below. Otherise it must be zeroed.
+     */
+    AVChannelCustom* map;
+  } u;
+
+  /**
+   * For some private data of the user.
+   */
+  void* opaque;
+} AVChannelLayout;
+
+/**
+ * Macro to define native channel layouts
+ *
+ * @note This doesn't use designated initializers for compatibility with C++ 17
+ * and older.
+ */
+#define AV_CHANNEL_LAYOUT_MASK(nb, m)                                    \
+  { /* .order */                                                         \
+    AV_CHANNEL_ORDER_NATIVE, /* .nb_channels */ (nb), /* .u.mask */ {m}, \
+        /* .opaque */ NULL                                               \
+  }
+
+/**
+ * @name Common pre-defined channel layouts
+ * @{
+ */
+#define AV_CHANNEL_LAYOUT_MONO AV_CHANNEL_LAYOUT_MASK(1, AV_CH_LAYOUT_MONO)
+#define AV_CHANNEL_LAYOUT_STEREO AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_STEREO)
+#define AV_CHANNEL_LAYOUT_2POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_2POINT1)
+#define AV_CHANNEL_LAYOUT_2_1 AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_2_1)
+#define AV_CHANNEL_LAYOUT_SURROUND \
+  AV_CHANNEL_LAYOUT_MASK(3, AV_CH_LAYOUT_SURROUND)
+#define AV_CHANNEL_LAYOUT_3POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_3POINT1)
+#define AV_CHANNEL_LAYOUT_4POINT0 \
+  AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_4POINT0)
+#define AV_CHANNEL_LAYOUT_4POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_4POINT1)
+#define AV_CHANNEL_LAYOUT_2_2 AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_2_2)
+#define AV_CHANNEL_LAYOUT_QUAD AV_CHANNEL_LAYOUT_MASK(4, AV_CH_LAYOUT_QUAD)
+#define AV_CHANNEL_LAYOUT_5POINT0 \
+  AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_5POINT0)
+#define AV_CHANNEL_LAYOUT_5POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_5POINT1)
+#define AV_CHANNEL_LAYOUT_5POINT0_BACK \
+  AV_CHANNEL_LAYOUT_MASK(5, AV_CH_LAYOUT_5POINT0_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1_BACK \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_5POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT0 \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_6POINT0)
+#define AV_CHANNEL_LAYOUT_6POINT0_FRONT \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_6POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_3POINT1POINT2 \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_3POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_HEXAGONAL \
+  AV_CHANNEL_LAYOUT_MASK(6, AV_CH_LAYOUT_HEXAGONAL)
+#define AV_CHANNEL_LAYOUT_6POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1)
+#define AV_CHANNEL_LAYOUT_6POINT1_BACK \
+  AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1_BACK)
+#define AV_CHANNEL_LAYOUT_6POINT1_FRONT \
+  AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_6POINT1_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT0 \
+  AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_7POINT0)
+#define AV_CHANNEL_LAYOUT_7POINT0_FRONT \
+  AV_CHANNEL_LAYOUT_MASK(7, AV_CH_LAYOUT_7POINT0_FRONT)
+#define AV_CHANNEL_LAYOUT_7POINT1 \
+  AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE \
+  AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1_WIDE)
+#define AV_CHANNEL_LAYOUT_7POINT1_WIDE_BACK \
+  AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_7POINT1_WIDE_BACK)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK \
+  AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_5POINT1POINT2_BACK)
+#define AV_CHANNEL_LAYOUT_OCTAGONAL \
+  AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_OCTAGONAL)
+#define AV_CHANNEL_LAYOUT_CUBE AV_CHANNEL_LAYOUT_MASK(8, AV_CH_LAYOUT_CUBE)
+#define AV_CHANNEL_LAYOUT_5POINT1POINT4_BACK \
+  AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_5POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT2 \
+  AV_CHANNEL_LAYOUT_MASK(10, AV_CH_LAYOUT_7POINT1POINT2)
+#define AV_CHANNEL_LAYOUT_7POINT1POINT4_BACK \
+  AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_7POINT2POINT3 \
+  AV_CHANNEL_LAYOUT_MASK(12, AV_CH_LAYOUT_7POINT2POINT3)
+#define AV_CHANNEL_LAYOUT_9POINT1POINT4_BACK \
+  AV_CHANNEL_LAYOUT_MASK(14, AV_CH_LAYOUT_9POINT1POINT4_BACK)
+#define AV_CHANNEL_LAYOUT_HEXADECAGONAL \
+  AV_CHANNEL_LAYOUT_MASK(16, AV_CH_LAYOUT_HEXADECAGONAL)
+#define AV_CHANNEL_LAYOUT_STEREO_DOWNMIX \
+  AV_CHANNEL_LAYOUT_MASK(2, AV_CH_LAYOUT_STEREO_DOWNMIX)
+#define AV_CHANNEL_LAYOUT_22POINT2 \
+  AV_CHANNEL_LAYOUT_MASK(24, AV_CH_LAYOUT_22POINT2)
+
+#define AV_CHANNEL_LAYOUT_7POINT1_TOP_BACK AV_CHANNEL_LAYOUT_5POINT1POINT2_BACK
+
+#define AV_CHANNEL_LAYOUT_AMBISONIC_FIRST_ORDER                          \
+  { /* .order */                                                         \
+    AV_CHANNEL_ORDER_AMBISONIC, /* .nb_channels */ 4, /* .u.mask */ {0}, \
+        /* .opaque */ NULL                                               \
+  }
+/** @} */
+
+struct AVBPrint;
+
+/**
+ * Get a human readable string in an abbreviated form describing a given
+ * channel. This is the inverse function of @ref av_channel_from_string().
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose name to get
+ * @return amount of bytes needed to hold the output string, or a negative
+ * AVERROR on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_name(char* buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_name().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_name_bprint(struct AVBPrint* bp, enum AVChannel channel_id);
+
+/**
+ * Get a human readable string describing a given channel.
+ *
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @param channel the AVChannel whose description to get
+ * @return amount of bytes needed to hold the output string, or a negative
+ * AVERROR on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_description(char* buf, size_t buf_size, enum AVChannel channel);
+
+/**
+ * bprint variant of av_channel_description().
+ *
+ * @note the string will be appended to the bprint buffer.
+ */
+void av_channel_description_bprint(struct AVBPrint* bp,
+                                   enum AVChannel channel_id);
+
+/**
+ * This is the inverse function of @ref av_channel_name().
+ *
+ * @return the channel with the given name
+ *         AV_CHAN_NONE when name does not identify a known channel
+ */
+enum AVChannel av_channel_from_string(const char* name);
+
+/**
+ * Initialize a custom channel layout with the specified number of channels.
+ * The channel map will be allocated and the designation of all channels will
+ * be set to AV_CHAN_UNKNOWN.
+ *
+ * This is only a convenience helper function, a custom channel layout can also
+ * be constructed without using this.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param nb_channels the number of channels
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) if the number of channels <= 0
+ *         AVERROR(ENOMEM) if the channel map could not be allocated
+ */
+int av_channel_layout_custom_init(AVChannelLayout* channel_layout,
+                                  int nb_channels);
+
+/**
+ * Initialize a native channel layout from a bitmask indicating which channels
+ * are present.
+ *
+ * @param channel_layout the layout structure to be initialized
+ * @param mask bitmask describing the channel layout
+ *
+ * @return 0 on success
+ *         AVERROR(EINVAL) for invalid mask values
+ */
+int av_channel_layout_from_mask(AVChannelLayout* channel_layout, uint64_t mask);
+
+/**
+ * Initialize a channel layout from a given string description.
+ * The input string can be represented by:
+ *  - the formal channel layout name (returned by av_channel_layout_describe())
+ *  - single or multiple channel names (returned by av_channel_name(), eg. "FL",
+ *    or concatenated with "+", each optionally containing a custom name after
+ *    a "@", eg. "FL@Left+FR@Right+LFE")
+ *  - a decimal or hexadecimal value of a native channel layout (eg. "4" or
+ * "0x4")
+ *  - the number of channels with default layout (eg. "4c")
+ *  - the number of unordered channels (eg. "4C" or "4 channels")
+ *  - the ambisonic order followed by optional non-diegetic channels (eg.
+ *    "ambisonic 2+stereo")
+ * On error, the channel layout will remain uninitialized, but not necessarily
+ * untouched.
+ *
+ * @param channel_layout uninitialized channel layout for the result
+ * @param str string describing the channel layout
+ * @return 0 on success parsing the channel layout
+ *         AVERROR(EINVAL) if an invalid channel layout string was provided
+ *         AVERROR(ENOMEM) if there was not enough memory
+ */
+int av_channel_layout_from_string(AVChannelLayout* channel_layout,
+                                  const char* str);
+
+/**
+ * Get the default channel layout for a given number of channels.
+ *
+ * @param ch_layout the layout structure to be initialized
+ * @param nb_channels number of channels
+ */
+void av_channel_layout_default(AVChannelLayout* ch_layout, int nb_channels);
+
+/**
+ * Iterate over all standard channel layouts.
+ *
+ * @param opaque a pointer where libavutil will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the standard channel layout or NULL when the iteration is
+ *         finished
+ */
+const AVChannelLayout* av_channel_layout_standard(void** opaque);
+
+/**
+ * Free any allocated data in the channel layout and reset the channel
+ * count to 0.
+ *
+ * @param channel_layout the layout structure to be uninitialized
+ */
+void av_channel_layout_uninit(AVChannelLayout* channel_layout);
+
+/**
+ * Make a copy of a channel layout. This differs from just assigning src to dst
+ * in that it allocates and copies the map for AV_CHANNEL_ORDER_CUSTOM.
+ *
+ * @note the destination channel_layout will be always uninitialized before
+ * copy.
+ *
+ * @param dst destination channel layout
+ * @param src source channel layout
+ * @return 0 on success, a negative AVERROR on error.
+ */
+int av_channel_layout_copy(AVChannelLayout* dst, const AVChannelLayout* src);
+
+/**
+ * Get a human-readable string describing the channel layout properties.
+ * The string will be in the same format that is accepted by
+ * @ref av_channel_layout_from_string(), allowing to rebuild the same
+ * channel layout, except for opaque pointers.
+ *
+ * @param channel_layout channel layout to be described
+ * @param buf pre-allocated buffer where to put the generated string
+ * @param buf_size size in bytes of the buffer.
+ * @return amount of bytes needed to hold the output string, or a negative
+ * AVERROR on failure. If the returned value is bigger than buf_size, then the
+ *         string was truncated.
+ */
+int av_channel_layout_describe(const AVChannelLayout* channel_layout, char* buf,
+                               size_t buf_size);
+
+/**
+ * bprint variant of av_channel_layout_describe().
+ *
+ * @note the string will be appended to the bprint buffer.
+ * @return 0 on success, or a negative AVERROR value on failure.
+ */
+int av_channel_layout_describe_bprint(const AVChannelLayout* channel_layout,
+                                      struct AVBPrint* bp);
+
+/**
+ * Get the channel with the given index in a channel layout.
+ *
+ * @param channel_layout input channel layout
+ * @param idx index of the channel
+ * @return channel with the index idx in channel_layout on success or
+ *         AV_CHAN_NONE on failure (if idx is not valid or the channel order is
+ *         unspecified)
+ */
+enum AVChannel av_channel_layout_channel_from_index(
+    const AVChannelLayout* channel_layout, unsigned int idx);
+
+/**
+ * Get the index of a given channel in a channel layout. In case multiple
+ * channels are found, only the first match will be returned.
+ *
+ * @param channel_layout input channel layout
+ * @param channel the channel whose index to obtain
+ * @return index of channel in channel_layout on success or a negative number if
+ *         channel is not present in channel_layout.
+ */
+int av_channel_layout_index_from_channel(const AVChannelLayout* channel_layout,
+                                         enum AVChannel channel);
+
+/**
+ * Get the index in a channel layout of a channel described by the given string.
+ * In case multiple channels are found, only the first match will be returned.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel whose index to obtain
+ * @return a channel index described by the given string, or a negative AVERROR
+ *         value.
+ */
+int av_channel_layout_index_from_string(const AVChannelLayout* channel_layout,
+                                        const char* name);
+
+/**
+ * Get a channel described by the given string.
+ *
+ * This function accepts channel names in the same format as
+ * @ref av_channel_from_string().
+ *
+ * @param channel_layout input channel layout
+ * @param name string describing the channel to obtain
+ * @return a channel described by the given string in channel_layout on success
+ *         or AV_CHAN_NONE on failure (if the string is not valid or the channel
+ *         order is unspecified)
+ */
+enum AVChannel av_channel_layout_channel_from_string(
+    const AVChannelLayout* channel_layout, const char* name);
+
+/**
+ * Find out what channels from a given set are present in a channel layout,
+ * without regard for their positions.
+ *
+ * @param channel_layout input channel layout
+ * @param mask a combination of AV_CH_* representing a set of channels
+ * @return a bitfield representing all the channels from mask that are present
+ *         in channel_layout
+ */
+uint64_t av_channel_layout_subset(const AVChannelLayout* channel_layout,
+                                  uint64_t mask);
+
+/**
+ * Check whether a channel layout is valid, i.e. can possibly describe audio
+ * data.
+ *
+ * @param channel_layout input channel layout
+ * @return 1 if channel_layout is valid, 0 otherwise.
+ */
+int av_channel_layout_check(const AVChannelLayout* channel_layout);
+
+/**
+ * Check whether two channel layouts are semantically the same, i.e. the same
+ * channels are present on the same positions in both.
+ *
+ * If one of the channel layouts is AV_CHANNEL_ORDER_UNSPEC, while the other is
+ * not, they are considered to be unequal. If both are AV_CHANNEL_ORDER_UNSPEC,
+ * they are considered equal iff the channel counts are the same in both.
+ *
+ * @param chl input channel layout
+ * @param chl1 input channel layout
+ * @return 0 if chl and chl1 are equal, 1 if they are not equal. A negative
+ *         AVERROR code if one or both are invalid.
+ */
+int av_channel_layout_compare(const AVChannelLayout* chl,
+                              const AVChannelLayout* chl1);
+
+/**
+ * The conversion must be lossless.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS (1 << 0)
+
+/**
+ * The specified retype target order is ignored and the simplest possible
+ * (canonical) order is used for which the input layout can be losslessy
+ * represented.
+ */
+#define AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL (1 << 1)
+
+/**
+ * Change the AVChannelOrder of a channel layout.
+ *
+ * Change of AVChannelOrder can be either lossless or lossy. In case of a
+ * lossless conversion all the channel designations and the associated channel
+ * names (if any) are kept. On a lossy conversion the channel names and channel
+ * designations might be lost depending on the capabilities of the desired
+ * AVChannelOrder. Note that some conversions are simply not possible in which
+ * case this function returns AVERROR(ENOSYS).
+ *
+ * The following conversions are supported:
+ *
+ * Any       -> Custom     : Always possible, always lossless.
+ * Any       -> Unspecified: Always possible, lossless if channel designations
+ *   are all unknown and channel names are not used, lossy otherwise.
+ * Custom    -> Ambisonic  : Possible if it contains ambisonic channels with
+ *   optional non-diegetic channels in the end. Lossy if the channels have
+ *   custom names, lossless otherwise.
+ * Custom    -> Native     : Possible if it contains native channels in native
+ *     order. Lossy if the channels have custom names, lossless otherwise.
+ *
+ * On error this function keeps the original channel layout untouched.
+ *
+ * @param channel_layout channel layout which will be changed
+ * @param order the desired channel layout order
+ * @param flags a combination of AV_CHANNEL_LAYOUT_RETYPE_FLAG_* constants
+ * @return 0 if the conversion was successful and lossless or if the channel
+ *           layout was already in the desired order
+ *         >0 if the conversion was successful but lossy
+ *         AVERROR(ENOSYS) if the conversion was not possible (or would be
+ *           lossy and AV_CHANNEL_LAYOUT_RETYPE_FLAG_LOSSLESS was specified)
+ *         AVERROR(EINVAL), AVERROR(ENOMEM) on error
+ */
+int av_channel_layout_retype(AVChannelLayout* channel_layout,
+                             enum AVChannelOrder order, int flags);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_CHANNEL_LAYOUT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/common.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/common.h
new file mode 100644
index 0000000000..fa8398889a
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/common.h
@@ -0,0 +1,587 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * common internal and external API header
+ */
+
+#ifndef AVUTIL_COMMON_H
+#define AVUTIL_COMMON_H
+
+#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && \
+    !defined(UINT64_C)
+#  error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
+#endif
+
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "attributes.h"
+#include "error.h"
+#include "macros.h"
+
+#ifdef HAVE_AV_CONFIG_H
+#  include "config.h"
+#  include "intmath.h"
+#  include "internal.h"
+#else
+#  include "mem.h"
+#endif /* HAVE_AV_CONFIG_H */
+
+// rounded division & shift
+#define RSHIFT(a, b)                          \
+  ((a) > 0 ? ((a) + ((1 << (b)) >> 1)) >> (b) \
+           : ((a) + ((1 << (b)) >> 1) - 1) >> (b))
+/* assume b>0 */
+#define ROUNDED_DIV(a, b) \
+  (((a) >= 0 ? (a) + ((b) >> 1) : (a) - ((b) >> 1)) / (b))
+/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
+#define AV_CEIL_RSHIFT(a, b) \
+  (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) : ((a) + (1 << (b)) - 1) >> (b))
+/* Backwards compat. */
+#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
+
+#define FFUDIV(a, b) (((a) > 0 ? (a) : (a) - (b) + 1) / (b))
+#define FFUMOD(a, b) ((a) - (b) * FFUDIV(a, b))
+
+/**
+ * Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as
+ * they are not representable as absolute values of their type. This is the same
+ * as with *abs()
+ * @see FFNABS()
+ */
+#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
+#define FFSIGN(a) ((a) > 0 ? 1 : -1)
+
+/**
+ * Negative Absolute value.
+ * this works for all integers of all types.
+ * As with many macros, this evaluates its argument twice, it thus must not have
+ * a sideeffect, that is FFNABS(x++) has undefined behavior.
+ */
+#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
+
+/**
+ * Unsigned Absolute value.
+ * This takes the absolute value of a signed int and returns it as a unsigned.
+ * This also works with INT_MIN which would otherwise not be representable
+ * As with many macros, this evaluates its argument twice.
+ */
+#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
+#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
+
+/* misc math functions */
+
+#ifndef av_ceil_log2
+#  define av_ceil_log2 av_ceil_log2_c
+#endif
+#ifndef av_clip
+#  define av_clip av_clip_c
+#endif
+#ifndef av_clip64
+#  define av_clip64 av_clip64_c
+#endif
+#ifndef av_clip_uint8
+#  define av_clip_uint8 av_clip_uint8_c
+#endif
+#ifndef av_clip_int8
+#  define av_clip_int8 av_clip_int8_c
+#endif
+#ifndef av_clip_uint16
+#  define av_clip_uint16 av_clip_uint16_c
+#endif
+#ifndef av_clip_int16
+#  define av_clip_int16 av_clip_int16_c
+#endif
+#ifndef av_clipl_int32
+#  define av_clipl_int32 av_clipl_int32_c
+#endif
+#ifndef av_clip_intp2
+#  define av_clip_intp2 av_clip_intp2_c
+#endif
+#ifndef av_clip_uintp2
+#  define av_clip_uintp2 av_clip_uintp2_c
+#endif
+#ifndef av_mod_uintp2
+#  define av_mod_uintp2 av_mod_uintp2_c
+#endif
+#ifndef av_sat_add32
+#  define av_sat_add32 av_sat_add32_c
+#endif
+#ifndef av_sat_dadd32
+#  define av_sat_dadd32 av_sat_dadd32_c
+#endif
+#ifndef av_sat_sub32
+#  define av_sat_sub32 av_sat_sub32_c
+#endif
+#ifndef av_sat_dsub32
+#  define av_sat_dsub32 av_sat_dsub32_c
+#endif
+#ifndef av_sat_add64
+#  define av_sat_add64 av_sat_add64_c
+#endif
+#ifndef av_sat_sub64
+#  define av_sat_sub64 av_sat_sub64_c
+#endif
+#ifndef av_clipf
+#  define av_clipf av_clipf_c
+#endif
+#ifndef av_clipd
+#  define av_clipd av_clipd_c
+#endif
+#ifndef av_popcount
+#  define av_popcount av_popcount_c
+#endif
+#ifndef av_popcount64
+#  define av_popcount64 av_popcount64_c
+#endif
+#ifndef av_parity
+#  define av_parity av_parity_c
+#endif
+
+#ifndef av_log2
+av_const int av_log2(unsigned v);
+#endif
+
+#ifndef av_log2_16bit
+av_const int av_log2_16bit(unsigned v);
+#endif
+
+/**
+ * Clip a signed integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_c(int a, int amin, int amax) {
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+  if (amin > amax) abort();
+#endif
+  if (a < amin)
+    return amin;
+  else if (a > amax)
+    return amax;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed 64bit integer value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin,
+                                                     int64_t amax) {
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+  if (amin > amax) abort();
+#endif
+  if (a < amin)
+    return amin;
+  else if (a > amax)
+    return amax;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-255 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint8_t av_clip_uint8_c(int a) {
+  if (a & (~0xFF))
+    return (~a) >> 31;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed integer value into the -128,127 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int8_t av_clip_int8_c(int a) {
+  if ((a + 0x80U) & ~0xFF)
+    return (a >> 31) ^ 0x7F;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed integer value into the 0-65535 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const uint16_t av_clip_uint16_c(int a) {
+  if (a & (~0xFFFF))
+    return (~a) >> 31;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed integer value into the -32768,32767 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int16_t av_clip_int16_c(int a) {
+  if ((a + 0x8000U) & ~0xFFFF)
+    return (a >> 31) ^ 0x7FFF;
+  else
+    return a;
+}
+
+/**
+ * Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
+ * @param a value to clip
+ * @return clipped value
+ */
+static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a) {
+  if ((a + 0x80000000u) & ~UINT64_C(0xFFFFFFFF))
+    return (int32_t)((a >> 63) ^ 0x7FFFFFFF);
+  else
+    return (int32_t)a;
+}
+
+/**
+ * Clip a signed integer into the -(2^p),(2^p-1) range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const int av_clip_intp2_c(int a, int p) {
+  if (((unsigned)a + (1 << p)) & ~((2 << p) - 1))
+    return (a >> 31) ^ ((1 << p) - 1);
+  else
+    return a;
+}
+
+/**
+ * Clip a signed integer to an unsigned power of two range.
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p) {
+  if (a & ~((1 << p) - 1))
+    return (~a) >> 31 & ((1 << p) - 1);
+  else
+    return a;
+}
+
+/**
+ * Clear high bits from an unsigned integer starting with specific bit position
+ * @param  a value to clip
+ * @param  p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a,
+                                                          unsigned p) {
+  return a & ((1U << p) - 1);
+}
+
+/**
+ * Add two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int av_sat_add32_c(int a, int b) {
+  return av_clipl_int32((int64_t)a + b);
+}
+
+/**
+ * Add a doubled value to another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and added to a
+ * @return sum sat(a + sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dadd32_c(int a, int b) {
+  return av_sat_add32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Subtract two signed 32-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int av_sat_sub32_c(int a, int b) {
+  return av_clipl_int32((int64_t)a - b);
+}
+
+/**
+ * Subtract a doubled value from another value with saturation at both stages.
+ *
+ * @param  a first value
+ * @param  b value doubled and subtracted from a
+ * @return difference sat(a - sat(2*b)) with signed saturation
+ */
+static av_always_inline int av_sat_dsub32_c(int a, int b) {
+  return av_sat_sub32(a, av_sat_add32(b, b));
+}
+
+/**
+ * Add two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5, 1)) || \
+    AV_HAS_BUILTIN(__builtin_add_overflow)
+  int64_t tmp;
+  return !__builtin_add_overflow(a, b, &tmp)
+             ? tmp
+             : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+  int64_t s = a + (uint64_t)b;
+  if ((int64_t)(a ^ b | ~s ^ b) >= 0) return INT64_MAX ^ (b >> 63);
+  return s;
+#endif
+}
+
+/**
+ * Subtract two signed 64-bit values with saturation.
+ *
+ * @param  a one value
+ * @param  b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5, 1)) || \
+    AV_HAS_BUILTIN(__builtin_sub_overflow)
+  int64_t tmp;
+  return !__builtin_sub_overflow(a, b, &tmp)
+             ? tmp
+             : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+  if (b <= 0 && a >= INT64_MAX + b) return INT64_MAX;
+  if (b >= 0 && a <= INT64_MIN + b) return INT64_MIN;
+  return a - b;
+#endif
+}
+
+/**
+ * Clip a float value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const float av_clipf_c(float a, float amin,
+                                                  float amax) {
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+  if (amin > amax) abort();
+#endif
+  return FFMIN(FFMAX(a, amin), amax);
+}
+
+/**
+ * Clip a double value into the amin-amax range.
+ * If a is nan or -inf amin will be returned.
+ * If a is +inf amax will be returned.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
+ */
+static av_always_inline av_const double av_clipd_c(double a, double amin,
+                                                   double amax) {
+#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
+  if (amin > amax) abort();
+#endif
+  return FFMIN(FFMAX(a, amin), amax);
+}
+
+/** Compute ceil(log2(x)).
+ * @param x value used to compute ceil(log2(x))
+ * @return computed ceiling of log2(x)
+ */
+static av_always_inline av_const int av_ceil_log2_c(int x) {
+  return av_log2((x - 1U) << 1);
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount_c(uint32_t x) {
+  x -= (x >> 1) & 0x55555555;
+  x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+  x = (x + (x >> 4)) & 0x0F0F0F0F;
+  x += x >> 8;
+  return (x + (x >> 16)) & 0x3F;
+}
+
+/**
+ * Count number of bits set to one in x
+ * @param x value to count bits of
+ * @return the number of bits set to one in x
+ */
+static av_always_inline av_const int av_popcount64_c(uint64_t x) {
+  return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
+}
+
+static av_always_inline av_const int av_parity_c(uint32_t v) {
+  return av_popcount(v) & 1;
+}
+
+/**
+ * Convert a UTF-8 character (up to 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val      Output value, must be an lvalue of type uint32_t.
+ * @param GET_BYTE Expression reading one byte from the input.
+ *                 Evaluated up to 7 times (4 for the currently
+ *                 assigned Unicode range).  With a memory buffer
+ *                 input, this could be *ptr++, or if you want to make sure
+ *                 that *ptr stops at the end of a NULL terminated string then
+ *                 *ptr ? *ptr++ : 0
+ * @param ERROR    Expression to be evaluated on invalid input,
+ *                 typically a goto statement.
+ *
+ * @warning ERROR should not contain a loop control statement which
+ * could interact with the internal while loop, and should force an
+ * exit from the macro code (e.g. through a goto or a return) in order
+ * to prevent undefined results.
+ */
+#define GET_UTF8(val, GET_BYTE, ERROR)         \
+  val = (GET_BYTE);                            \
+  {                                            \
+    uint32_t top = (val & 128) >> 1;           \
+    if ((val & 0xc0) == 0x80 || val >= 0xFE) { \
+      ERROR                                    \
+    }                                          \
+    while (val & top) {                        \
+      unsigned int tmp = (GET_BYTE)-128;       \
+      if (tmp >> 6) {                          \
+        ERROR                                  \
+      }                                        \
+      val = (val << 6) + tmp;                  \
+      top <<= 5;                               \
+    }                                          \
+    val &= (top << 1) - 1;                     \
+  }
+
+/**
+ * Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
+ *
+ * @param val       Output value, must be an lvalue of type uint32_t.
+ * @param GET_16BIT Expression returning two bytes of UTF-16 data converted
+ *                  to native byte order.  Evaluated one or two times.
+ * @param ERROR     Expression to be evaluated on invalid input,
+ *                  typically a goto statement.
+ */
+#define GET_UTF16(val, GET_16BIT, ERROR) \
+  val = (GET_16BIT);                     \
+  {                                      \
+    unsigned int hi = val - 0xD800;      \
+    if (hi < 0x800) {                    \
+      val = (GET_16BIT)-0xDC00;          \
+      if (val > 0x3FFU || hi > 0x3FFU) { \
+        ERROR                            \
+      }                                  \
+      val += (hi << 10) + 0x10000;       \
+    }                                    \
+  }
+
+/**
+ * @def PUT_UTF8(val, tmp, PUT_BYTE)
+ * Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes
+ * long).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint8_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_BYTE.
+ * @param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
+ * It could be a function or a statement, and uses tmp as the input byte.
+ * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
+ * executed up to 4 times for values in the valid UTF-8 range and up to
+ * 7 times in the general case, depending on the length of the converted
+ * Unicode character.
+ */
+#define PUT_UTF8(val, tmp, PUT_BYTE)                \
+  {                                                 \
+    int bytes, shift;                               \
+    uint32_t in = val;                              \
+    if (in < 0x80) {                                \
+      tmp = in;                                     \
+      PUT_BYTE                                      \
+    } else {                                        \
+      bytes = (av_log2(in) + 4) / 5;                \
+      shift = (bytes - 1) * 6;                      \
+      tmp = (256 - (256 >> bytes)) | (in >> shift); \
+      PUT_BYTE                                      \
+      while (shift >= 6) {                          \
+        shift -= 6;                                 \
+        tmp = 0x80 | ((in >> shift) & 0x3f);        \
+        PUT_BYTE                                    \
+      }                                             \
+    }                                               \
+  }
+
+/**
+ * @def PUT_UTF16(val, tmp, PUT_16BIT)
+ * Convert a 32-bit Unicode character to its UTF-16 encoded form (2 or 4 bytes).
+ * @param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-16. If
+ * val is given as a function it is executed only once.
+ * @param tmp is a temporary variable and should be of type uint16_t. It
+ * represents an intermediate value during conversion that is to be
+ * output by PUT_16BIT.
+ * @param PUT_16BIT writes the converted UTF-16 data to any proper destination
+ * in desired endianness. It could be a function or a statement, and uses tmp
+ * as the input byte.  For example, PUT_BYTE could be "*output++ = tmp;"
+ * PUT_BYTE will be executed 1 or 2 times depending on input character.
+ */
+#define PUT_UTF16(val, tmp, PUT_16BIT)         \
+  {                                            \
+    uint32_t in = val;                         \
+    if (in < 0x10000) {                        \
+      tmp = in;                                \
+      PUT_16BIT                                \
+    } else {                                   \
+      tmp = 0xD800 | ((in - 0x10000) >> 10);   \
+      PUT_16BIT                                \
+      tmp = 0xDC00 | ((in - 0x10000) & 0x3FF); \
+      PUT_16BIT                                \
+    }                                          \
+  }
+
+#endif /* AVUTIL_COMMON_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/cpu.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/cpu.h
new file mode 100644
index 0000000000..3eb950fdd0
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/cpu.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_CPU_H
+#define AVUTIL_CPU_H
+
+#include <stddef.h>
+
+#define AV_CPU_FLAG_FORCE 0x80000000 /* force usage of selected flags (OR) */
+
+/* lower 16 bits - CPU features */
+#define AV_CPU_FLAG_MMX 0x0001     ///< standard MMX
+#define AV_CPU_FLAG_MMXEXT 0x0002  ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_MMX2 0x0002    ///< SSE integer functions or AMD MMX ext
+#define AV_CPU_FLAG_3DNOW 0x0004   ///< AMD 3DNOW
+#define AV_CPU_FLAG_SSE 0x0008     ///< SSE functions
+#define AV_CPU_FLAG_SSE2 0x0010    ///< PIV SSE2 functions
+#define AV_CPU_FLAG_SSE2SLOW \
+  0x40000000                         ///< SSE2 supported, but usually not faster
+                                     ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_3DNOWEXT 0x0020  ///< AMD 3DNowExt
+#define AV_CPU_FLAG_SSE3 0x0040      ///< Prescott SSE3 functions
+#define AV_CPU_FLAG_SSE3SLOW \
+  0x20000000                      ///< SSE3 supported, but usually not faster
+                                  ///< than regular MMX/SSE (e.g. Core1)
+#define AV_CPU_FLAG_SSSE3 0x0080  ///< Conroe SSSE3 functions
+#define AV_CPU_FLAG_SSSE3SLOW \
+  0x4000000  ///< SSSE3 supported, but usually not faster
+#define AV_CPU_FLAG_ATOM \
+  0x10000000  ///< Atom processor, some SSSE3 instructions are slower
+#define AV_CPU_FLAG_SSE4 0x0100    ///< Penryn SSE4.1 functions
+#define AV_CPU_FLAG_SSE42 0x0200   ///< Nehalem SSE4.2 functions
+#define AV_CPU_FLAG_AESNI 0x80000  ///< Advanced Encryption Standard functions
+#define AV_CPU_FLAG_AVX \
+  0x4000  ///< AVX functions: requires OS support even if YMM registers aren't
+          ///< used
+#define AV_CPU_FLAG_AVXSLOW \
+  0x8000000  ///< AVX supported, but slow when using YMM registers (e.g.
+             ///< Bulldozer)
+#define AV_CPU_FLAG_XOP 0x0400   ///< Bulldozer XOP functions
+#define AV_CPU_FLAG_FMA4 0x0800  ///< Bulldozer FMA4 functions
+#define AV_CPU_FLAG_CMOV 0x1000  ///< supports cmov instruction
+#define AV_CPU_FLAG_AVX2 \
+  0x8000  ///< AVX2 functions: requires OS support even if YMM registers aren't
+          ///< used
+#define AV_CPU_FLAG_FMA3 0x10000  ///< Haswell FMA3 functions
+#define AV_CPU_FLAG_BMI1 0x20000  ///< Bit Manipulation Instruction Set 1
+#define AV_CPU_FLAG_BMI2 0x40000  ///< Bit Manipulation Instruction Set 2
+#define AV_CPU_FLAG_AVX512 \
+  0x100000  ///< AVX-512 functions: requires OS support even if YMM/ZMM
+            ///< registers aren't used
+#define AV_CPU_FLAG_AVX512ICL \
+  0x200000  ///< F/CD/BW/DQ/VL/VNNI/IFMA/VBMI/VBMI2/VPOPCNTDQ/BITALG/GFNI/VAES/VPCLMULQDQ
+#define AV_CPU_FLAG_SLOW_GATHER 0x2000000  ///< CPU has slow gathers.
+
+#define AV_CPU_FLAG_ALTIVEC 0x0001  ///< standard
+#define AV_CPU_FLAG_VSX 0x0002      ///< ISA 2.06
+#define AV_CPU_FLAG_POWER8 0x0004   ///< ISA 2.07
+
+#define AV_CPU_FLAG_ARMV5TE (1 << 0)
+#define AV_CPU_FLAG_ARMV6 (1 << 1)
+#define AV_CPU_FLAG_ARMV6T2 (1 << 2)
+#define AV_CPU_FLAG_VFP (1 << 3)
+#define AV_CPU_FLAG_VFPV3 (1 << 4)
+#define AV_CPU_FLAG_NEON (1 << 5)
+#define AV_CPU_FLAG_ARMV8 (1 << 6)
+#define AV_CPU_FLAG_VFP_VM \
+  (1 << 7)  ///< VFPv2 vector mode, deprecated in ARMv7-A and unavailable in
+            ///< various CPUs implementations
+#define AV_CPU_FLAG_DOTPROD (1 << 8)
+#define AV_CPU_FLAG_I8MM (1 << 9)
+#define AV_CPU_FLAG_SETEND (1 << 16)
+
+#define AV_CPU_FLAG_MMI (1 << 0)
+#define AV_CPU_FLAG_MSA (1 << 1)
+
+// Loongarch SIMD extension.
+#define AV_CPU_FLAG_LSX (1 << 0)
+#define AV_CPU_FLAG_LASX (1 << 1)
+
+// RISC-V extensions
+#define AV_CPU_FLAG_RVI (1 << 0)        ///< I (full GPR bank)
+#define AV_CPU_FLAG_RVF (1 << 1)        ///< F (single precision FP)
+#define AV_CPU_FLAG_RVD (1 << 2)        ///< D (double precision FP)
+#define AV_CPU_FLAG_RVV_I32 (1 << 3)    ///< Vectors of 8/16/32-bit int's */
+#define AV_CPU_FLAG_RVV_F32 (1 << 4)    ///< Vectors of float's */
+#define AV_CPU_FLAG_RVV_I64 (1 << 5)    ///< Vectors of 64-bit int's */
+#define AV_CPU_FLAG_RVV_F64 (1 << 6)    ///< Vectors of double's
+#define AV_CPU_FLAG_RVB_BASIC (1 << 7)  ///< Basic bit-manipulations
+#define AV_CPU_FLAG_RVB_ADDR (1 << 8)   ///< Address bit-manipulations
+
+/**
+ * Return the flags which specify extensions supported by the CPU.
+ * The returned value is affected by av_force_cpu_flags() if that was used
+ * before. So av_get_cpu_flags() can easily be used in an application to
+ * detect the enabled cpu flags.
+ */
+int av_get_cpu_flags(void);
+
+/**
+ * Disables cpu detection and forces the specified flags.
+ * -1 is a special case that disables forcing of specific flags.
+ */
+void av_force_cpu_flags(int flags);
+
+/**
+ * Parse CPU caps from a string and update the given AV_CPU_* flags based on
+ * that.
+ *
+ * @return negative on error.
+ */
+int av_parse_cpu_caps(unsigned* flags, const char* s);
+
+/**
+ * @return the number of logical CPU cores present.
+ */
+int av_cpu_count(void);
+
+/**
+ * Overrides cpu count detection and forces the specified count.
+ * Count < 1 disables forcing of specific count.
+ */
+void av_cpu_force_count(int count);
+
+/**
+ * Get the maximum data alignment that may be required by FFmpeg.
+ *
+ * Note that this is affected by the build configuration and the CPU flags mask,
+ * so e.g. if the CPU supports AVX, but libavutil has been built with
+ * --disable-avx or the AV_CPU_FLAG_AVX flag has been disabled through
+ *  av_set_cpu_flags_mask(), then this function will behave as if AVX is not
+ *  present.
+ */
+size_t av_cpu_max_align(void);
+
+#endif /* AVUTIL_CPU_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/dict.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/dict.h
new file mode 100644
index 0000000000..967a1c8041
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/dict.h
@@ -0,0 +1,259 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Public dictionary API.
+ * @deprecated
+ *  AVDictionary is provided for compatibility with libav. It is both in
+ *  implementation as well as API inefficient. It does not scale and is
+ *  extremely slow with large dictionaries.
+ *  It is recommended that new code uses our tree container from tree.c/h
+ *  where applicable, which uses AVL trees to achieve O(log n) performance.
+ */
+
+#ifndef AVUTIL_DICT_H
+#define AVUTIL_DICT_H
+
+#include <stdint.h>
+
+/**
+ * @addtogroup lavu_dict AVDictionary
+ * @ingroup lavu_data
+ *
+ * @brief Simple key:value store
+ *
+ * @{
+ * Dictionaries are used for storing key-value pairs.
+ *
+ * - To **create an AVDictionary**, simply pass an address of a NULL
+ *   pointer to av_dict_set(). NULL can be used as an empty dictionary
+ *   wherever a pointer to an AVDictionary is required.
+ * - To **insert an entry**, use av_dict_set().
+ * - Use av_dict_get() to **retrieve an entry**.
+ * - To **iterate over all entries**, use av_dict_iterate().
+ * - In order to **free the dictionary and all its contents**, use
+ av_dict_free().
+ *
+ @code
+   AVDictionary *d = NULL;           // "create" an empty dictionary
+   AVDictionaryEntry *t = NULL;
+
+   av_dict_set(&d, "foo", "bar", 0); // add an entry
+
+   char *k = av_strdup("key");       // if your strings are already allocated,
+   char *v = av_strdup("value");     // you can avoid copying them like this
+   av_dict_set(&d, k, v, AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
+
+   while ((t = av_dict_iterate(d, t))) {
+       <....>                        // iterate over all entries in d
+   }
+   av_dict_free(&d);
+ @endcode
+ */
+
+/**
+ * @name AVDictionary Flags
+ * Flags that influence behavior of the matching of keys or insertion to the
+ * dictionary.
+ * @{
+ */
+#define AV_DICT_MATCH_CASE                                             \
+  1 /**< Only get an entry with exact-case key match. Only relevant in \
+       av_dict_get(). */
+#define AV_DICT_IGNORE_SUFFIX                                               \
+  2 /**< Return first entry in a dictionary whose first part corresponds to \
+       the search key, ignoring the suffix of the found key string. Only                          \
+       relevant in av_dict_get(). */
+#define AV_DICT_DONT_STRDUP_KEY              \
+  4 /**< Take ownership of a key that's been \
+         allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_STRDUP_VAL                                              \
+  8                               /**< Take ownership of a value that's been \
+                                       allocated with av_malloc() or another memory allocation function. */
+#define AV_DICT_DONT_OVERWRITE 16 /**< Don't overwrite existing entries. */
+#define AV_DICT_APPEND                                             \
+  32 /**< If the entry already exists, append to it.  Note that no \
+          delimiter is added, the strings are simply concatenated. */
+#define AV_DICT_MULTIKEY \
+  64 /**< Allow to store several equal keys in the dictionary */
+/**
+ * @}
+ */
+
+typedef struct AVDictionaryEntry {
+  char* key;
+  char* value;
+} AVDictionaryEntry;
+
+typedef struct AVDictionary AVDictionary;
+
+/**
+ * Get a dictionary entry with matching key.
+ *
+ * The returned entry key or value must not be changed, or it will
+ * cause undefined behavior.
+ *
+ * @param prev  Set to the previous matching element to find the next.
+ *              If set to NULL the first matching element is returned.
+ * @param key   Matching key
+ * @param flags A collection of AV_DICT_* flags controlling how the
+ *              entry is retrieved
+ *
+ * @return      Found entry or NULL in case no matching entry was found in the
+ * dictionary
+ */
+AVDictionaryEntry* av_dict_get(const AVDictionary* m, const char* key,
+                               const AVDictionaryEntry* prev, int flags);
+
+/**
+ * Iterate over a dictionary
+ *
+ * Iterates through all entries in the dictionary.
+ *
+ * @warning The returned AVDictionaryEntry key/value must not be changed.
+ *
+ * @warning As av_dict_set() invalidates all previous entries returned
+ * by this function, it must not be called while iterating over the dict.
+ *
+ * Typical usage:
+ * @code
+ * const AVDictionaryEntry *e = NULL;
+ * while ((e = av_dict_iterate(m, e))) {
+ *     // ...
+ * }
+ * @endcode
+ *
+ * @param m     The dictionary to iterate over
+ * @param prev  Pointer to the previous AVDictionaryEntry, NULL initially
+ *
+ * @retval AVDictionaryEntry* The next element in the dictionary
+ * @retval NULL               No more elements in the dictionary
+ */
+const AVDictionaryEntry* av_dict_iterate(const AVDictionary* m,
+                                         const AVDictionaryEntry* prev);
+
+/**
+ * Get number of entries in dictionary.
+ *
+ * @param m dictionary
+ * @return  number of entries in dictionary
+ */
+int av_dict_count(const AVDictionary* m);
+
+/**
+ * Set the given entry in *pm, overwriting an existing entry.
+ *
+ * Note: If AV_DICT_DONT_STRDUP_KEY or AV_DICT_DONT_STRDUP_VAL is set,
+ * these arguments will be freed on error.
+ *
+ * @warning Adding a new entry to a dictionary invalidates all existing entries
+ * previously returned with av_dict_get() or av_dict_iterate().
+ *
+ * @param pm        Pointer to a pointer to a dictionary struct. If *pm is NULL
+ *                  a dictionary struct is allocated and put in *pm.
+ * @param key       Entry key to add to *pm (will either be av_strduped or added
+ * as a new key depending on flags)
+ * @param value     Entry value to add to *pm (will be av_strduped or added as a
+ * new key depending on flags). Passing a NULL value will cause an existing
+ * entry to be deleted.
+ *
+ * @return          >= 0 on success otherwise an error code <0
+ */
+int av_dict_set(AVDictionary** pm, const char* key, const char* value,
+                int flags);
+
+/**
+ * Convenience wrapper for av_dict_set() that converts the value to a string
+ * and stores it.
+ *
+ * Note: If ::AV_DICT_DONT_STRDUP_KEY is set, key will be freed on error.
+ */
+int av_dict_set_int(AVDictionary** pm, const char* key, int64_t value,
+                    int flags);
+
+/**
+ * Parse the key/value pairs list and add the parsed entries to a dictionary.
+ *
+ * In case of failure, all the successfully set entries are stored in
+ * *pm. You may need to manually free the created dictionary.
+ *
+ * @param key_val_sep  A 0-terminated list of characters used to separate
+ *                     key from value
+ * @param pairs_sep    A 0-terminated list of characters used to separate
+ *                     two pairs from each other
+ * @param flags        Flags to use when adding to the dictionary.
+ *                     ::AV_DICT_DONT_STRDUP_KEY and ::AV_DICT_DONT_STRDUP_VAL
+ *                     are ignored since the key/value tokens will always
+ *                     be duplicated.
+ *
+ * @return             0 on success, negative AVERROR code on failure
+ */
+int av_dict_parse_string(AVDictionary** pm, const char* str,
+                         const char* key_val_sep, const char* pairs_sep,
+                         int flags);
+
+/**
+ * Copy entries from one AVDictionary struct into another.
+ *
+ * @note Metadata is read using the ::AV_DICT_IGNORE_SUFFIX flag
+ *
+ * @param dst   Pointer to a pointer to a AVDictionary struct to copy into. If
+ * *dst is NULL, this function will allocate a struct for you and put it in *dst
+ * @param src   Pointer to the source AVDictionary struct to copy items from.
+ * @param flags Flags to use when setting entries in *dst
+ *
+ * @return 0 on success, negative AVERROR code on failure. If dst was allocated
+ *           by this function, callers should free the associated memory.
+ */
+int av_dict_copy(AVDictionary** dst, const AVDictionary* src, int flags);
+
+/**
+ * Free all the memory allocated for an AVDictionary struct
+ * and all keys and values.
+ */
+void av_dict_free(AVDictionary** m);
+
+/**
+ * Get dictionary entries as a string.
+ *
+ * Create a string containing dictionary's entries.
+ * Such string may be passed back to av_dict_parse_string().
+ * @note String is escaped with backslashes ('\').
+ *
+ * @warning Separators cannot be neither '\\' nor '\0'. They also cannot be the
+ * same.
+ *
+ * @param[in]  m             The dictionary
+ * @param[out] buffer        Pointer to buffer that will be allocated with
+ * string containg entries. Buffer must be freed by the caller when is no longer
+ * needed.
+ * @param[in]  key_val_sep   Character used to separate key from value
+ * @param[in]  pairs_sep     Character used to separate two pairs from each
+ * other
+ *
+ * @return                   >= 0 on success, negative on error
+ */
+int av_dict_get_string(const AVDictionary* m, char** buffer,
+                       const char key_val_sep, const char pairs_sep);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_DICT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/error.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/error.h
new file mode 100644
index 0000000000..74af5b1534
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/error.h
@@ -0,0 +1,158 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * error code definitions
+ */
+
+#ifndef AVUTIL_ERROR_H
+#define AVUTIL_ERROR_H
+
+#include <errno.h>
+#include <stddef.h>
+
+#include "macros.h"
+
+/**
+ * @addtogroup lavu_error
+ *
+ * @{
+ */
+
+/* error handling */
+#if EDOM > 0
+#  define AVERROR(e) \
+    (-(e))  ///< Returns a negative error code from a POSIX error code, to
+            ///< return from library functions.
+#  define AVUNERROR(e) \
+    (-(e))  ///< Returns a POSIX error code from a library function error return
+            ///< value.
+#else
+/* Some platforms have E* and errno already negated. */
+#  define AVERROR(e) (e)
+#  define AVUNERROR(e) (e)
+#endif
+
+#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d))
+
+#define AVERROR_BSF_NOT_FOUND \
+  FFERRTAG(0xF8, 'B', 'S', 'F')  ///< Bitstream filter not found
+#define AVERROR_BUG \
+  FFERRTAG('B', 'U', 'G', '!')  ///< Internal bug, also see AVERROR_BUG2
+#define AVERROR_BUFFER_TOO_SMALL \
+  FFERRTAG('B', 'U', 'F', 'S')  ///< Buffer too small
+#define AVERROR_DECODER_NOT_FOUND \
+  FFERRTAG(0xF8, 'D', 'E', 'C')  ///< Decoder not found
+#define AVERROR_DEMUXER_NOT_FOUND \
+  FFERRTAG(0xF8, 'D', 'E', 'M')  ///< Demuxer not found
+#define AVERROR_ENCODER_NOT_FOUND \
+  FFERRTAG(0xF8, 'E', 'N', 'C')                   ///< Encoder not found
+#define AVERROR_EOF FFERRTAG('E', 'O', 'F', ' ')  ///< End of file
+#define AVERROR_EXIT \
+  FFERRTAG('E', 'X', 'I', 'T')  ///< Immediate exit was requested; the called
+                                ///< function should not be restarted
+#define AVERROR_EXTERNAL \
+  FFERRTAG('E', 'X', 'T', ' ')  ///< Generic error in an external library
+#define AVERROR_FILTER_NOT_FOUND \
+  FFERRTAG(0xF8, 'F', 'I', 'L')  ///< Filter not found
+#define AVERROR_INVALIDDATA \
+  FFERRTAG('I', 'N', 'D', 'A')  ///< Invalid data found when processing input
+#define AVERROR_MUXER_NOT_FOUND \
+  FFERRTAG(0xF8, 'M', 'U', 'X')  ///< Muxer not found
+#define AVERROR_OPTION_NOT_FOUND \
+  FFERRTAG(0xF8, 'O', 'P', 'T')  ///< Option not found
+#define AVERROR_PATCHWELCOME \
+  FFERRTAG('P', 'A', 'W',    \
+           'E')  ///< Not yet implemented in FFmpeg, patches welcome
+#define AVERROR_PROTOCOL_NOT_FOUND \
+  FFERRTAG(0xF8, 'P', 'R', 'O')  ///< Protocol not found
+
+#define AVERROR_STREAM_NOT_FOUND \
+  FFERRTAG(0xF8, 'S', 'T', 'R')  ///< Stream not found
+/**
+ * This is semantically identical to AVERROR_BUG
+ * it has been introduced in Libav after our AVERROR_BUG and with a modified
+ * value.
+ */
+#define AVERROR_BUG2 FFERRTAG('B', 'U', 'G', ' ')
+#define AVERROR_UNKNOWN   \
+  FFERRTAG('U', 'N', 'K', \
+           'N')  ///< Unknown error, typically from an external library
+#define AVERROR_EXPERIMENTAL \
+  (-0x2bb2afa8)  ///< Requested feature is flagged experimental. Set
+                 ///< strict_std_compliance if you really want to use it.
+#define AVERROR_INPUT_CHANGED \
+  (-0x636e6701)  ///< Input changed between calls. Reconfiguration is required.
+                 ///< (can be OR-ed with AVERROR_OUTPUT_CHANGED)
+#define AVERROR_OUTPUT_CHANGED \
+  (-0x636e6702)  ///< Output changed between calls. Reconfiguration is required.
+                 ///< (can be OR-ed with AVERROR_INPUT_CHANGED)
+/* HTTP & RTSP errors */
+#define AVERROR_HTTP_BAD_REQUEST FFERRTAG(0xF8, '4', '0', '0')
+#define AVERROR_HTTP_UNAUTHORIZED FFERRTAG(0xF8, '4', '0', '1')
+#define AVERROR_HTTP_FORBIDDEN FFERRTAG(0xF8, '4', '0', '3')
+#define AVERROR_HTTP_NOT_FOUND FFERRTAG(0xF8, '4', '0', '4')
+#define AVERROR_HTTP_OTHER_4XX FFERRTAG(0xF8, '4', 'X', 'X')
+#define AVERROR_HTTP_SERVER_ERROR FFERRTAG(0xF8, '5', 'X', 'X')
+
+#define AV_ERROR_MAX_STRING_SIZE 64
+
+/**
+ * Put a description of the AVERROR code errnum in errbuf.
+ * In case of failure the global variable errno is set to indicate the
+ * error. Even in case of failure av_strerror() will print a generic
+ * error message indicating the errnum provided to errbuf.
+ *
+ * @param errnum      error code to describe
+ * @param errbuf      buffer to which description is written
+ * @param errbuf_size the size in bytes of errbuf
+ * @return 0 on success, a negative value if a description for errnum
+ * cannot be found
+ */
+int av_strerror(int errnum, char* errbuf, size_t errbuf_size);
+
+/**
+ * Fill the provided buffer with a string containing an error string
+ * corresponding to the AVERROR code errnum.
+ *
+ * @param errbuf         a buffer
+ * @param errbuf_size    size in bytes of errbuf
+ * @param errnum         error code to describe
+ * @return the buffer in input, filled with the error description
+ * @see av_strerror()
+ */
+static inline char* av_make_error_string(char* errbuf, size_t errbuf_size,
+                                         int errnum) {
+  av_strerror(errnum, errbuf, errbuf_size);
+  return errbuf;
+}
+
+/**
+ * Convenience macro, the return value should be used only directly in
+ * function arguments but never stand-alone.
+ */
+#define av_err2str(errnum)                                  \
+  av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, \
+                       AV_ERROR_MAX_STRING_SIZE, errnum)
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_ERROR_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/frame.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/frame.h
new file mode 100644
index 0000000000..82abfb925d
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/frame.h
@@ -0,0 +1,1112 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_frame
+ * reference-counted frame API
+ */
+
+#ifndef AVUTIL_FRAME_H
+#define AVUTIL_FRAME_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "avutil.h"
+#include "buffer.h"
+#include "channel_layout.h"
+#include "dict.h"
+#include "rational.h"
+#include "samplefmt.h"
+#include "pixfmt.h"
+#include "version.h"
+
+/**
+ * @defgroup lavu_frame AVFrame
+ * @ingroup lavu_data
+ *
+ * @{
+ * AVFrame is an abstraction for reference-counted raw multimedia data.
+ */
+
+enum AVFrameSideDataType {
+  /**
+   * The data is the AVPanScan struct defined in libavcodec.
+   */
+  AV_FRAME_DATA_PANSCAN,
+  /**
+   * ATSC A53 Part 4 Closed Captions.
+   * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
+   * The number of bytes of CC data is AVFrameSideData.size.
+   */
+  AV_FRAME_DATA_A53_CC,
+  /**
+   * Stereoscopic 3d metadata.
+   * The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
+   */
+  AV_FRAME_DATA_STEREO3D,
+  /**
+   * The data is the AVMatrixEncoding enum defined in
+   * libavutil/channel_layout.h.
+   */
+  AV_FRAME_DATA_MATRIXENCODING,
+  /**
+   * Metadata relevant to a downmix procedure.
+   * The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
+   */
+  AV_FRAME_DATA_DOWNMIX_INFO,
+  /**
+   * ReplayGain information in the form of the AVReplayGain struct.
+   */
+  AV_FRAME_DATA_REPLAYGAIN,
+  /**
+   * This side data contains a 3x3 transformation matrix describing an affine
+   * transformation that needs to be applied to the frame for correct
+   * presentation.
+   *
+   * See libavutil/display.h for a detailed description of the data.
+   */
+  AV_FRAME_DATA_DISPLAYMATRIX,
+  /**
+   * Active Format Description data consisting of a single byte as specified
+   * in ETSI TS 101 154 using AVActiveFormatDescription enum.
+   */
+  AV_FRAME_DATA_AFD,
+  /**
+   * Motion vectors exported by some codecs (on demand through the export_mvs
+   * flag set in the libavcodec AVCodecContext flags2 option).
+   * The data is the AVMotionVector struct defined in
+   * libavutil/motion_vector.h.
+   */
+  AV_FRAME_DATA_MOTION_VECTORS,
+  /**
+   * Recommmends skipping the specified number of samples. This is exported
+   * only if the "skip_manual" AVOption is set in libavcodec.
+   * This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
+   * @code
+   * u32le number of samples to skip from start of this packet
+   * u32le number of samples to skip from end of this packet
+   * u8    reason for start skip
+   * u8    reason for end   skip (0=padding silence, 1=convergence)
+   * @endcode
+   */
+  AV_FRAME_DATA_SKIP_SAMPLES,
+  /**
+   * This side data must be associated with an audio frame and corresponds to
+   * enum AVAudioServiceType defined in avcodec.h.
+   */
+  AV_FRAME_DATA_AUDIO_SERVICE_TYPE,
+  /**
+   * Mastering display metadata associated with a video frame. The payload is
+   * an AVMasteringDisplayMetadata type and contains information about the
+   * mastering display color volume.
+   */
+  AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
+  /**
+   * The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
+   * This is set on the first frame of a GOP that has a temporal reference of 0.
+   */
+  AV_FRAME_DATA_GOP_TIMECODE,
+
+  /**
+   * The data represents the AVSphericalMapping structure defined in
+   * libavutil/spherical.h.
+   */
+  AV_FRAME_DATA_SPHERICAL,
+
+  /**
+   * Content light level (based on CTA-861.3). This payload contains data in
+   * the form of the AVContentLightMetadata struct.
+   */
+  AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
+
+  /**
+   * The data contains an ICC profile as an opaque octet buffer following the
+   * format described by ISO 15076-1 with an optional name defined in the
+   * metadata key entry "name".
+   */
+  AV_FRAME_DATA_ICC_PROFILE,
+
+  /**
+   * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4
+   * uint32_t where the first uint32_t describes how many (1-3) of the other
+   * timecodes are used. The timecode format is described in the documentation
+   * of av_timecode_get_smpte_from_framenum() function in libavutil/timecode.h.
+   */
+  AV_FRAME_DATA_S12M_TIMECODE,
+
+  /**
+   * HDR dynamic metadata associated with a video frame. The payload is
+   * an AVDynamicHDRPlus type and contains information for color
+   * volume transform - application 4 of SMPTE 2094-40:2016 standard.
+   */
+  AV_FRAME_DATA_DYNAMIC_HDR_PLUS,
+
+  /**
+   * Regions Of Interest, the data is an array of AVRegionOfInterest type, the
+   * number of array element is implied by AVFrameSideData.size /
+   * AVRegionOfInterest.self_size.
+   */
+  AV_FRAME_DATA_REGIONS_OF_INTEREST,
+
+  /**
+   * Encoding parameters for a video frame, as described by AVVideoEncParams.
+   */
+  AV_FRAME_DATA_VIDEO_ENC_PARAMS,
+
+  /**
+   * User data unregistered metadata associated with a video frame.
+   * This is the H.26[45] UDU SEI message, and shouldn't be used for any other
+   * purpose The data is stored as uint8_t in AVFrameSideData.data which is 16
+   * bytes of uuid_iso_iec_11578 followed by AVFrameSideData.size - 16 bytes of
+   * user_data_payload_byte.
+   */
+  AV_FRAME_DATA_SEI_UNREGISTERED,
+
+  /**
+   * Film grain parameters for a frame, described by AVFilmGrainParams.
+   * Must be present for every frame which should have film grain applied.
+   *
+   * May be present multiple times, for example when there are multiple
+   * alternative parameter sets for different video signal characteristics.
+   * The user should select the most appropriate set for the application.
+   */
+  AV_FRAME_DATA_FILM_GRAIN_PARAMS,
+
+  /**
+   * Bounding boxes for object detection and classification,
+   * as described by AVDetectionBBoxHeader.
+   */
+  AV_FRAME_DATA_DETECTION_BBOXES,
+
+  /**
+   * Dolby Vision RPU raw data, suitable for passing to x265
+   * or other libraries. Array of uint8_t, with NAL emulation
+   * bytes intact.
+   */
+  AV_FRAME_DATA_DOVI_RPU_BUFFER,
+
+  /**
+   * Parsed Dolby Vision metadata, suitable for passing to a software
+   * implementation. The payload is the AVDOVIMetadata struct defined in
+   * libavutil/dovi_meta.h.
+   */
+  AV_FRAME_DATA_DOVI_METADATA,
+
+  /**
+   * HDR Vivid dynamic metadata associated with a video frame. The payload is
+   * an AVDynamicHDRVivid type and contains information for color
+   * volume transform - CUVA 005.1-2021.
+   */
+  AV_FRAME_DATA_DYNAMIC_HDR_VIVID,
+
+  /**
+   * Ambient viewing environment metadata, as defined by H.274.
+   */
+  AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT,
+
+  /**
+   * Provide encoder-specific hinting information about changed/unchanged
+   * portions of a frame.  It can be used to pass information about which
+   * macroblocks can be skipped because they didn't change from the
+   * corresponding ones in the previous frame. This could be useful for
+   * applications which know this information in advance to speed up
+   * encoding.
+   */
+  AV_FRAME_DATA_VIDEO_HINT,
+};
+
+enum AVActiveFormatDescription {
+  AV_AFD_SAME = 8,
+  AV_AFD_4_3 = 9,
+  AV_AFD_16_9 = 10,
+  AV_AFD_14_9 = 11,
+  AV_AFD_4_3_SP_14_9 = 13,
+  AV_AFD_16_9_SP_14_9 = 14,
+  AV_AFD_SP_4_3 = 15,
+};
+
+/**
+ * Structure to hold side data for an AVFrame.
+ *
+ * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be
+ * added to the end with a minor bump.
+ */
+typedef struct AVFrameSideData {
+  enum AVFrameSideDataType type;
+  uint8_t* data;
+  size_t size;
+  AVDictionary* metadata;
+  AVBufferRef* buf;
+} AVFrameSideData;
+
+enum AVSideDataProps {
+  /**
+   * The side data type can be used in stream-global structures.
+   * Side data types without this property are only meaningful on per-frame
+   * basis.
+   */
+  AV_SIDE_DATA_PROP_GLOBAL = (1 << 0),
+
+  /**
+   * Multiple instances of this side data type can be meaningfully present in
+   * a single side data array.
+   */
+  AV_SIDE_DATA_PROP_MULTI = (1 << 1),
+};
+
+/**
+ * This struct describes the properties of a side data type. Its instance
+ * corresponding to a given type can be obtained from av_frame_side_data_desc().
+ */
+typedef struct AVSideDataDescriptor {
+  /**
+   * Human-readable side data description.
+   */
+  const char* name;
+
+  /**
+   * Side data property flags, a combination of AVSideDataProps values.
+   */
+  unsigned props;
+} AVSideDataDescriptor;
+
+/**
+ * Structure describing a single Region Of Interest.
+ *
+ * When multiple regions are defined in a single side-data block, they
+ * should be ordered from most to least important - some encoders are only
+ * capable of supporting a limited number of distinct regions, so will have
+ * to truncate the list.
+ *
+ * When overlapping regions are defined, the first region containing a given
+ * area of the frame applies.
+ */
+typedef struct AVRegionOfInterest {
+  /**
+   * Must be set to the size of this data structure (that is,
+   * sizeof(AVRegionOfInterest)).
+   */
+  uint32_t self_size;
+  /**
+   * Distance in pixels from the top edge of the frame to the top and
+   * bottom edges and from the left edge of the frame to the left and
+   * right edges of the rectangle defining this region of interest.
+   *
+   * The constraints on a region are encoder dependent, so the region
+   * actually affected may be slightly larger for alignment or other
+   * reasons.
+   */
+  int top;
+  int bottom;
+  int left;
+  int right;
+  /**
+   * Quantisation offset.
+   *
+   * Must be in the range -1 to +1.  A value of zero indicates no quality
+   * change.  A negative value asks for better quality (less quantisation),
+   * while a positive value asks for worse quality (greater quantisation).
+   *
+   * The range is calibrated so that the extreme values indicate the
+   * largest possible offset - if the rest of the frame is encoded with the
+   * worst possible quality, an offset of -1 indicates that this region
+   * should be encoded with the best possible quality anyway.  Intermediate
+   * values are then interpolated in some codec-dependent way.
+   *
+   * For example, in 10-bit H.264 the quantisation parameter varies between
+   * -12 and 51.  A typical qoffset value of -1/10 therefore indicates that
+   * this region should be encoded with a QP around one-tenth of the full
+   * range better than the rest of the frame.  So, if most of the frame
+   * were to be encoded with a QP of around 30, this region would get a QP
+   * of around 24 (an offset of approximately -1/10 * (51 - -12) = -6.3).
+   * An extreme value of -1 would indicate that this region should be
+   * encoded with the best possible quality regardless of the treatment of
+   * the rest of the frame - that is, should be encoded at a QP of -12.
+   */
+  AVRational qoffset;
+} AVRegionOfInterest;
+
+/**
+ * This structure describes decoded (raw) audio or video data.
+ *
+ * AVFrame must be allocated using av_frame_alloc(). Note that this only
+ * allocates the AVFrame itself, the buffers for the data must be managed
+ * through other means (see below).
+ * AVFrame must be freed with av_frame_free().
+ *
+ * AVFrame is typically allocated once and then reused multiple times to hold
+ * different data (e.g. a single AVFrame to hold frames received from a
+ * decoder). In such a case, av_frame_unref() will free any references held by
+ * the frame and reset it to its original clean state before it
+ * is reused again.
+ *
+ * The data described by an AVFrame is usually reference counted through the
+ * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
+ * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
+ * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
+ * every single data plane must be contained in one of the buffers in
+ * AVFrame.buf or AVFrame.extended_buf.
+ * There may be a single buffer for all the data, or one separate buffer for
+ * each plane, or anything in between.
+ *
+ * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
+ * to the end with a minor bump.
+ *
+ * Fields can be accessed through AVOptions, the name string used, matches the
+ * C structure field name for fields accessible through AVOptions. The AVClass
+ * for AVFrame can be obtained from avcodec_get_frame_class()
+ */
+typedef struct AVFrame {
+#define AV_NUM_DATA_POINTERS 8
+  /**
+   * pointer to the picture/channel planes.
+   * This might be different from the first allocated byte. For video,
+   * it could even point to the end of the image data.
+   *
+   * All pointers in data and extended_data must point into one of the
+   * AVBufferRef in buf or extended_buf.
+   *
+   * Some decoders access areas outside 0,0 - width,height, please
+   * see avcodec_align_dimensions2(). Some filters and swscale can read
+   * up to 16 bytes beyond the planes, if these filters are to be used,
+   * then 16 extra bytes must be allocated.
+   *
+   * NOTE: Pointers not needed by the format MUST be set to NULL.
+   *
+   * @attention In case of video, the data[] pointers can point to the
+   * end of image data in order to reverse line order, when used in
+   * combination with negative values in the linesize[] array.
+   */
+  uint8_t* data[AV_NUM_DATA_POINTERS];
+
+  /**
+   * For video, a positive or negative value, which is typically indicating
+   * the size in bytes of each picture line, but it can also be:
+   * - the negative byte size of lines for vertical flipping
+   *   (with data[n] pointing to the end of the data
+   * - a positive or negative multiple of the byte size as for accessing
+   *   even and odd fields of a frame (possibly flipped)
+   *
+   * For audio, only linesize[0] may be set. For planar audio, each channel
+   * plane must be the same size.
+   *
+   * For video the linesizes should be multiples of the CPUs alignment
+   * preference, this is 16 or 32 for modern desktop CPUs.
+   * Some code requires such alignment other code can be slower without
+   * correct alignment, for yet other it makes no difference.
+   *
+   * @note The linesize may be larger than the size of usable data -- there
+   * may be extra padding present for performance reasons.
+   *
+   * @attention In case of video, line size values can be negative to achieve
+   * a vertically inverted iteration over image lines.
+   */
+  int linesize[AV_NUM_DATA_POINTERS];
+
+  /**
+   * pointers to the data planes/channels.
+   *
+   * For video, this should simply point to data[].
+   *
+   * For planar audio, each channel has a separate data pointer, and
+   * linesize[0] contains the size of each channel buffer.
+   * For packed audio, there is just one data pointer, and linesize[0]
+   * contains the total size of the buffer for all channels.
+   *
+   * Note: Both data and extended_data should always be set in a valid frame,
+   * but for planar audio with more channels that can fit in data,
+   * extended_data must be used in order to access all channels.
+   */
+  uint8_t** extended_data;
+
+  /**
+   * @name Video dimensions
+   * Video frames only. The coded dimensions (in pixels) of the video frame,
+   * i.e. the size of the rectangle that contains some well-defined values.
+   *
+   * @note The part of the frame intended for display/presentation is further
+   * restricted by the @ref cropping "Cropping rectangle".
+   * @{
+   */
+  int width, height;
+  /**
+   * @}
+   */
+
+  /**
+   * number of audio samples (per channel) described by this frame
+   */
+  int nb_samples;
+
+  /**
+   * format of the frame, -1 if unknown or unset
+   * Values correspond to enum AVPixelFormat for video frames,
+   * enum AVSampleFormat for audio)
+   */
+  int format;
+
+#if FF_API_FRAME_KEY
+  /**
+   * 1 -> keyframe, 0-> not
+   *
+   * @deprecated Use AV_FRAME_FLAG_KEY instead
+   */
+  attribute_deprecated int key_frame;
+#endif
+
+  /**
+   * Picture type of the frame.
+   */
+  enum AVPictureType pict_type;
+
+  /**
+   * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
+   */
+  AVRational sample_aspect_ratio;
+
+  /**
+   * Presentation timestamp in time_base units (time when frame should be shown
+   * to user).
+   */
+  int64_t pts;
+
+  /**
+   * DTS copied from the AVPacket that triggered returning this frame. (if frame
+   * threading isn't used) This is also the Presentation time of this AVFrame
+   * calculated from only AVPacket.dts values without pts values.
+   */
+  int64_t pkt_dts;
+
+  /**
+   * Time base for the timestamps in this frame.
+   * In the future, this field may be set on frames output by decoders or
+   * filters, but its value will be by default ignored on input to encoders
+   * or filters.
+   */
+  AVRational time_base;
+
+  /**
+   * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
+   */
+  int quality;
+
+  /**
+   * Frame owner's private data.
+   *
+   * This field may be set by the code that allocates/owns the frame data.
+   * It is then not touched by any library functions, except:
+   * - it is copied to other references by av_frame_copy_props() (and hence by
+   *   av_frame_ref());
+   * - it is set to NULL when the frame is cleared by av_frame_unref()
+   * - on the caller's explicit request. E.g. libavcodec encoders/decoders
+   *   will copy this field to/from @ref AVPacket "AVPackets" if the caller sets
+   *   @ref AV_CODEC_FLAG_COPY_OPAQUE.
+   *
+   * @see opaque_ref the reference-counted analogue
+   */
+  void* opaque;
+
+  /**
+   * Number of fields in this frame which should be repeated, i.e. the total
+   * duration of this frame should be repeat_pict + 2 normal field durations.
+   *
+   * For interlaced frames this field may be set to 1, which signals that this
+   * frame should be presented as 3 fields: beginning with the first field (as
+   * determined by AV_FRAME_FLAG_TOP_FIELD_FIRST being set or not), followed
+   * by the second field, and then the first field again.
+   *
+   * For progressive frames this field may be set to a multiple of 2, which
+   * signals that this frame's duration should be (repeat_pict + 2) / 2
+   * normal frame durations.
+   *
+   * @note This field is computed from MPEG2 repeat_first_field flag and its
+   * associated flags, H.264 pic_struct from picture timing SEI, and
+   * their analogues in other codecs. Typically it should only be used when
+   * higher-layer timing information is not available.
+   */
+  int repeat_pict;
+
+#if FF_API_INTERLACED_FRAME
+  /**
+   * The content of the picture is interlaced.
+   *
+   * @deprecated Use AV_FRAME_FLAG_INTERLACED instead
+   */
+  attribute_deprecated int interlaced_frame;
+
+  /**
+   * If the content is interlaced, is top field displayed first.
+   *
+   * @deprecated Use AV_FRAME_FLAG_TOP_FIELD_FIRST instead
+   */
+  attribute_deprecated int top_field_first;
+#endif
+
+#if FF_API_PALETTE_HAS_CHANGED
+  /**
+   * Tell user application that palette has changed from previous frame.
+   */
+  attribute_deprecated int palette_has_changed;
+#endif
+
+  /**
+   * Sample rate of the audio data.
+   */
+  int sample_rate;
+
+  /**
+   * AVBuffer references backing the data for this frame. All the pointers in
+   * data and extended_data must point inside one of the buffers in buf or
+   * extended_buf. This array must be filled contiguously -- if buf[i] is
+   * non-NULL then buf[j] must also be non-NULL for all j < i.
+   *
+   * There may be at most one AVBuffer per data plane, so for video this array
+   * always contains all the references. For planar audio with more than
+   * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
+   * this array. Then the extra AVBufferRef pointers are stored in the
+   * extended_buf array.
+   */
+  AVBufferRef* buf[AV_NUM_DATA_POINTERS];
+
+  /**
+   * For planar audio which requires more than AV_NUM_DATA_POINTERS
+   * AVBufferRef pointers, this array will hold all the references which
+   * cannot fit into AVFrame.buf.
+   *
+   * Note that this is different from AVFrame.extended_data, which always
+   * contains all the pointers. This array only contains the extra pointers,
+   * which cannot fit into AVFrame.buf.
+   *
+   * This array is always allocated using av_malloc() by whoever constructs
+   * the frame. It is freed in av_frame_unref().
+   */
+  AVBufferRef** extended_buf;
+  /**
+   * Number of elements in extended_buf.
+   */
+  int nb_extended_buf;
+
+  AVFrameSideData** side_data;
+  int nb_side_data;
+
+/**
+ * @defgroup lavu_frame_flags AV_FRAME_FLAGS
+ * @ingroup lavu_frame
+ * Flags describing additional frame properties.
+ *
+ * @{
+ */
+
+/**
+ * The frame data may be corrupted, e.g. due to decoding errors.
+ */
+#define AV_FRAME_FLAG_CORRUPT (1 << 0)
+/**
+ * A flag to mark frames that are keyframes.
+ */
+#define AV_FRAME_FLAG_KEY (1 << 1)
+/**
+ * A flag to mark the frames which need to be decoded, but shouldn't be output.
+ */
+#define AV_FRAME_FLAG_DISCARD (1 << 2)
+/**
+ * A flag to mark frames whose content is interlaced.
+ */
+#define AV_FRAME_FLAG_INTERLACED (1 << 3)
+/**
+ * A flag to mark frames where the top field is displayed first if the content
+ * is interlaced.
+ */
+#define AV_FRAME_FLAG_TOP_FIELD_FIRST (1 << 4)
+  /**
+   * @}
+   */
+
+  /**
+   * Frame flags, a combination of @ref lavu_frame_flags
+   */
+  int flags;
+
+  /**
+   * MPEG vs JPEG YUV range.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVColorRange color_range;
+
+  enum AVColorPrimaries color_primaries;
+
+  enum AVColorTransferCharacteristic color_trc;
+
+  /**
+   * YUV colorspace type.
+   * - encoding: Set by user
+   * - decoding: Set by libavcodec
+   */
+  enum AVColorSpace colorspace;
+
+  enum AVChromaLocation chroma_location;
+
+  /**
+   * frame timestamp estimated using various heuristics, in stream time base
+   * - encoding: unused
+   * - decoding: set by libavcodec, read by user.
+   */
+  int64_t best_effort_timestamp;
+
+#if FF_API_FRAME_PKT
+  /**
+   * reordered pos from the last AVPacket that has been input into the decoder
+   * - encoding: unused
+   * - decoding: Read by user.
+   * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
+   *             data from packets to frames
+   */
+  attribute_deprecated int64_t pkt_pos;
+#endif
+
+  /**
+   * metadata.
+   * - encoding: Set by user.
+   * - decoding: Set by libavcodec.
+   */
+  AVDictionary* metadata;
+
+  /**
+   * decode error flags of the frame, set to a combination of
+   * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
+   * were errors during the decoding.
+   * - encoding: unused
+   * - decoding: set by libavcodec, read by user.
+   */
+  int decode_error_flags;
+#define FF_DECODE_ERROR_INVALID_BITSTREAM 1
+#define FF_DECODE_ERROR_MISSING_REFERENCE 2
+#define FF_DECODE_ERROR_CONCEALMENT_ACTIVE 4
+#define FF_DECODE_ERROR_DECODE_SLICES 8
+
+#if FF_API_FRAME_PKT
+  /**
+   * size of the corresponding packet containing the compressed
+   * frame.
+   * It is set to a negative value if unknown.
+   * - encoding: unused
+   * - decoding: set by libavcodec, read by user.
+   * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
+   *             data from packets to frames
+   */
+  attribute_deprecated int pkt_size;
+#endif
+
+  /**
+   * For hwaccel-format frames, this should be a reference to the
+   * AVHWFramesContext describing the frame.
+   */
+  AVBufferRef* hw_frames_ctx;
+
+  /**
+   * Frame owner's private data.
+   *
+   * This field may be set by the code that allocates/owns the frame data.
+   * It is then not touched by any library functions, except:
+   * - a new reference to the underlying buffer is propagated by
+   *   av_frame_copy_props() (and hence by av_frame_ref());
+   * - it is unreferenced in av_frame_unref();
+   * - on the caller's explicit request. E.g. libavcodec encoders/decoders
+   *   will propagate a new reference to/from @ref AVPacket "AVPackets" if the
+   *   caller sets @ref AV_CODEC_FLAG_COPY_OPAQUE.
+   *
+   * @see opaque the plain pointer analogue
+   */
+  AVBufferRef* opaque_ref;
+
+  /**
+   * @anchor cropping
+   * @name Cropping
+   * Video frames only. The number of pixels to discard from the the
+   * top/bottom/left/right border of the frame to obtain the sub-rectangle of
+   * the frame intended for presentation.
+   * @{
+   */
+  size_t crop_top;
+  size_t crop_bottom;
+  size_t crop_left;
+  size_t crop_right;
+  /**
+   * @}
+   */
+
+  /**
+   * AVBufferRef for internal use by a single libav* library.
+   * Must not be used to transfer data between libraries.
+   * Has to be NULL when ownership of the frame leaves the respective library.
+   *
+   * Code outside the FFmpeg libs should never check or change the contents of
+   * the buffer ref.
+   *
+   * FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
+   * av_frame_copy_props() calls create a new reference with av_buffer_ref()
+   * for the target frame's private_ref field.
+   */
+  AVBufferRef* private_ref;
+
+  /**
+   * Channel layout of the audio data.
+   */
+  AVChannelLayout ch_layout;
+
+  /**
+   * Duration of the frame, in the same units as pts. 0 if unknown.
+   */
+  int64_t duration;
+} AVFrame;
+
+/**
+ * Allocate an AVFrame and set its fields to default values.  The resulting
+ * struct must be freed using av_frame_free().
+ *
+ * @return An AVFrame filled with default values or NULL on failure.
+ *
+ * @note this only allocates the AVFrame itself, not the data buffers. Those
+ * must be allocated through other means, e.g. with av_frame_get_buffer() or
+ * manually.
+ */
+AVFrame* av_frame_alloc(void);
+
+/**
+ * Free the frame and any dynamically allocated objects in it,
+ * e.g. extended_data. If the frame is reference counted, it will be
+ * unreferenced first.
+ *
+ * @param frame frame to be freed. The pointer will be set to NULL.
+ */
+void av_frame_free(AVFrame** frame);
+
+/**
+ * Set up a new reference to the data described by the source frame.
+ *
+ * Copy frame properties from src to dst and create a new reference for each
+ * AVBufferRef from src.
+ *
+ * If src is not reference counted, new buffers are allocated and the data is
+ * copied.
+ *
+ * @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
+ *           or newly allocated with av_frame_alloc() before calling this
+ *           function, or undefined behavior will occur.
+ *
+ * @return 0 on success, a negative AVERROR on error
+ */
+int av_frame_ref(AVFrame* dst, const AVFrame* src);
+
+/**
+ * Ensure the destination frame refers to the same data described by the source
+ * frame, either by creating a new reference for each AVBufferRef from src if
+ * they differ from those in dst, by allocating new buffers and copying data if
+ * src is not reference counted, or by unrefencing it if src is empty.
+ *
+ * Frame properties on dst will be replaced by those from src.
+ *
+ * @return 0 on success, a negative AVERROR on error. On error, dst is
+ *         unreferenced.
+ */
+int av_frame_replace(AVFrame* dst, const AVFrame* src);
+
+/**
+ * Create a new frame that references the same data as src.
+ *
+ * This is a shortcut for av_frame_alloc()+av_frame_ref().
+ *
+ * @return newly created AVFrame on success, NULL on error.
+ */
+AVFrame* av_frame_clone(const AVFrame* src);
+
+/**
+ * Unreference all the buffers referenced by frame and reset the frame fields.
+ */
+void av_frame_unref(AVFrame* frame);
+
+/**
+ * Move everything contained in src to dst and reset src.
+ *
+ * @warning: dst is not unreferenced, but directly overwritten without reading
+ *           or deallocating its contents. Call av_frame_unref(dst) manually
+ *           before calling this function to ensure that no memory is leaked.
+ */
+void av_frame_move_ref(AVFrame* dst, AVFrame* src);
+
+/**
+ * Allocate new buffer(s) for audio or video data.
+ *
+ * The following fields must be set on frame before calling this function:
+ * - format (pixel format for video, sample format for audio)
+ * - width and height for video
+ * - nb_samples and ch_layout for audio
+ *
+ * This function will fill AVFrame.data and AVFrame.buf arrays and, if
+ * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
+ * For planar formats, one buffer will be allocated for each plane.
+ *
+ * @warning: if frame already has been allocated, calling this function will
+ *           leak memory. In addition, undefined behavior can occur in certain
+ *           cases.
+ *
+ * @param frame frame in which to store the new buffers.
+ * @param align Required buffer size alignment. If equal to 0, alignment will be
+ *              chosen automatically for the current CPU. It is highly
+ *              recommended to pass 0 here unless you know what you are doing.
+ *
+ * @return 0 on success, a negative AVERROR on error.
+ */
+int av_frame_get_buffer(AVFrame* frame, int align);
+
+/**
+ * Check if the frame data is writable.
+ *
+ * @return A positive value if the frame data is writable (which is true if and
+ * only if each of the underlying buffers has only one reference, namely the one
+ * stored in this frame). Return 0 otherwise.
+ *
+ * If 1 is returned the answer is valid until av_buffer_ref() is called on any
+ * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
+ *
+ * @see av_frame_make_writable(), av_buffer_is_writable()
+ */
+int av_frame_is_writable(AVFrame* frame);
+
+/**
+ * Ensure that the frame data is writable, avoiding data copy if possible.
+ *
+ * Do nothing if the frame is writable, allocate new buffers and copy the data
+ * if it is not. Non-refcounted frames behave as non-writable, i.e. a copy
+ * is always made.
+ *
+ * @return 0 on success, a negative AVERROR on error.
+ *
+ * @see av_frame_is_writable(), av_buffer_is_writable(),
+ * av_buffer_make_writable()
+ */
+int av_frame_make_writable(AVFrame* frame);
+
+/**
+ * Copy the frame data from src to dst.
+ *
+ * This function does not allocate anything, dst must be already initialized and
+ * allocated with the same parameters as src.
+ *
+ * This function only copies the frame data (i.e. the contents of the data /
+ * extended data arrays), not any other properties.
+ *
+ * @return >= 0 on success, a negative AVERROR on error.
+ */
+int av_frame_copy(AVFrame* dst, const AVFrame* src);
+
+/**
+ * Copy only "metadata" fields from src to dst.
+ *
+ * Metadata for the purpose of this function are those fields that do not affect
+ * the data layout in the buffers.  E.g. pts, sample rate (for audio) or sample
+ * aspect ratio (for video), but not width/height or channel layout.
+ * Side data is also copied.
+ */
+int av_frame_copy_props(AVFrame* dst, const AVFrame* src);
+
+/**
+ * Get the buffer reference a given data plane is stored in.
+ *
+ * @param frame the frame to get the plane's buffer from
+ * @param plane index of the data plane of interest in frame->extended_data.
+ *
+ * @return the buffer reference that contains the plane or NULL if the input
+ * frame is not valid.
+ */
+AVBufferRef* av_frame_get_plane_buffer(const AVFrame* frame, int plane);
+
+/**
+ * Add a new side data to a frame.
+ *
+ * @param frame a frame to which the side data should be added
+ * @param type type of the added side data
+ * @param size size of the side data
+ *
+ * @return newly added side data on success, NULL on error
+ */
+AVFrameSideData* av_frame_new_side_data(AVFrame* frame,
+                                        enum AVFrameSideDataType type,
+                                        size_t size);
+
+/**
+ * Add a new side data to a frame from an existing AVBufferRef
+ *
+ * @param frame a frame to which the side data should be added
+ * @param type  the type of the added side data
+ * @param buf   an AVBufferRef to add as side data. The ownership of
+ *              the reference is transferred to the frame.
+ *
+ * @return newly added side data on success, NULL on error. On failure
+ *         the frame is unchanged and the AVBufferRef remains owned by
+ *         the caller.
+ */
+AVFrameSideData* av_frame_new_side_data_from_buf(AVFrame* frame,
+                                                 enum AVFrameSideDataType type,
+                                                 AVBufferRef* buf);
+
+/**
+ * @return a pointer to the side data of a given type on success, NULL if there
+ * is no side data with such type in this frame.
+ */
+AVFrameSideData* av_frame_get_side_data(const AVFrame* frame,
+                                        enum AVFrameSideDataType type);
+
+/**
+ * Remove and free all side data instances of the given type.
+ */
+void av_frame_remove_side_data(AVFrame* frame, enum AVFrameSideDataType type);
+
+/**
+ * Flags for frame cropping.
+ */
+enum {
+  /**
+   * Apply the maximum possible cropping, even if it requires setting the
+   * AVFrame.data[] entries to unaligned pointers. Passing unaligned data
+   * to FFmpeg API is generally not allowed, and causes undefined behavior
+   * (such as crashes). You can pass unaligned data only to FFmpeg APIs that
+   * are explicitly documented to accept it. Use this flag only if you
+   * absolutely know what you are doing.
+   */
+  AV_FRAME_CROP_UNALIGNED = 1 << 0,
+};
+
+/**
+ * Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
+ * crop_bottom fields. If cropping is successful, the function will adjust the
+ * data pointers and the width/height fields, and set the crop fields to 0.
+ *
+ * In all cases, the cropping boundaries will be rounded to the inherent
+ * alignment of the pixel format. In some cases, such as for opaque hwaccel
+ * formats, the left/top cropping is ignored. The crop fields are set to 0 even
+ * if the cropping was rounded or ignored.
+ *
+ * @param frame the frame which should be cropped
+ * @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
+ *
+ * @return >= 0 on success, a negative AVERROR on error. If the cropping fields
+ * were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
+ */
+int av_frame_apply_cropping(AVFrame* frame, int flags);
+
+/**
+ * @return a string identifying the side data type
+ */
+const char* av_frame_side_data_name(enum AVFrameSideDataType type);
+
+/**
+ * @return side data descriptor corresponding to a given side data type, NULL
+ *         when not available.
+ */
+const AVSideDataDescriptor* av_frame_side_data_desc(
+    enum AVFrameSideDataType type);
+
+/**
+ * Free all side data entries and their contents, then zeroes out the
+ * values which the pointers are pointing to.
+ *
+ * @param sd    pointer to array of side data to free. Will be set to NULL
+ *              upon return.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array. Will be set to 0 upon return.
+ */
+void av_frame_side_data_free(AVFrameSideData*** sd, int* nb_sd);
+
+#define AV_FRAME_SIDE_DATA_FLAG_UNIQUE (1 << 0)
+
+/**
+ * Add new side data entry to an array.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param type  type of the added side data
+ * @param size  size of the side data
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return newly added side data on success, NULL on error. In case of
+ *         AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of matching
+ *         AVFrameSideDataType will be removed before the addition is
+ *         attempted.
+ */
+AVFrameSideData* av_frame_side_data_new(AVFrameSideData*** sd, int* nb_sd,
+                                        enum AVFrameSideDataType type,
+                                        size_t size, unsigned int flags);
+
+/**
+ * Add a new side data entry to an array based on existing side data, taking
+ * a reference towards the contained AVBufferRef.
+ *
+ * @param sd    pointer to array of side data to which to add another entry,
+ *              or to NULL in order to start a new array.
+ * @param nb_sd pointer to an integer containing the number of entries in
+ *              the array.
+ * @param src   side data to be cloned, with a new reference utilized
+ *              for the buffer.
+ * @param flags Some combination of AV_FRAME_SIDE_DATA_FLAG_* flags, or 0.
+ *
+ * @return negative error code on failure, >=0 on success. In case of
+ *         AV_FRAME_SIDE_DATA_FLAG_UNIQUE being set, entries of matching
+ *         AVFrameSideDataType will be removed before the addition is
+ *         attempted.
+ */
+int av_frame_side_data_clone(AVFrameSideData*** sd, int* nb_sd,
+                             const AVFrameSideData* src, unsigned int flags);
+
+/**
+ * Get a side data entry of a specific type from an array.
+ *
+ * @param sd    array of side data.
+ * @param nb_sd integer containing the number of entries in the array.
+ * @param type  type of side data to be queried
+ *
+ * @return a pointer to the side data of a given type on success, NULL if there
+ *         is no side data with such type in this set.
+ */
+const AVFrameSideData* av_frame_side_data_get_c(
+    const AVFrameSideData* const* sd, const int nb_sd,
+    enum AVFrameSideDataType type);
+
+/**
+ * Wrapper around av_frame_side_data_get_c() to workaround the limitation
+ * that for any type T the conversion from T * const * to const T * const *
+ * is not performed automatically in C.
+ * @see av_frame_side_data_get_c()
+ */
+static inline const AVFrameSideData* av_frame_side_data_get(
+    AVFrameSideData* const* sd, const int nb_sd,
+    enum AVFrameSideDataType type) {
+  return av_frame_side_data_get_c((const AVFrameSideData* const*)sd, nb_sd,
+                                  type);
+}
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_FRAME_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext.h
new file mode 100644
index 0000000000..f2c5426d5f
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext.h
@@ -0,0 +1,594 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_H
+#define AVUTIL_HWCONTEXT_H
+
+#include "buffer.h"
+#include "frame.h"
+#include "log.h"
+#include "pixfmt.h"
+
+enum AVHWDeviceType {
+  AV_HWDEVICE_TYPE_NONE,
+  AV_HWDEVICE_TYPE_VDPAU,
+  AV_HWDEVICE_TYPE_CUDA,
+  AV_HWDEVICE_TYPE_VAAPI,
+  AV_HWDEVICE_TYPE_DXVA2,
+  AV_HWDEVICE_TYPE_QSV,
+  AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
+  AV_HWDEVICE_TYPE_D3D11VA,
+  AV_HWDEVICE_TYPE_DRM,
+  AV_HWDEVICE_TYPE_OPENCL,
+  AV_HWDEVICE_TYPE_MEDIACODEC,
+  AV_HWDEVICE_TYPE_VULKAN,
+  AV_HWDEVICE_TYPE_D3D12VA,
+};
+
+/**
+ * This struct aggregates all the (hardware/vendor-specific) "high-level" state,
+ * i.e. state that is not tied to a concrete processing configuration.
+ * E.g., in an API that supports hardware-accelerated encoding and decoding,
+ * this struct will (if possible) wrap the state that is common to both encoding
+ * and decoding and from which specific instances of encoders or decoders can be
+ * derived.
+ *
+ * This struct is reference-counted with the AVBuffer mechanism. The
+ * av_hwdevice_ctx_alloc() constructor yields a reference, whose data field
+ * points to the actual AVHWDeviceContext. Further objects derived from
+ * AVHWDeviceContext (such as AVHWFramesContext, describing a frame pool with
+ * specific properties) will hold an internal reference to it. After all the
+ * references are released, the AVHWDeviceContext itself will be freed,
+ * optionally invoking a user-specified callback for uninitializing the hardware
+ * state.
+ */
+typedef struct AVHWDeviceContext {
+  /**
+   * A class for logging. Set by av_hwdevice_ctx_alloc().
+   */
+  const AVClass* av_class;
+
+  /**
+   * This field identifies the underlying API used for hardware access.
+   *
+   * This field is set when this struct is allocated and never changed
+   * afterwards.
+   */
+  enum AVHWDeviceType type;
+
+  /**
+   * The format-specific data, allocated and freed by libavutil along with
+   * this context.
+   *
+   * Should be cast by the user to the format-specific context defined in the
+   * corresponding header (hwcontext_*.h) and filled as described in the
+   * documentation before calling av_hwdevice_ctx_init().
+   *
+   * After calling av_hwdevice_ctx_init() this struct should not be modified
+   * by the caller.
+   */
+  void* hwctx;
+
+  /**
+   * This field may be set by the caller before calling av_hwdevice_ctx_init().
+   *
+   * If non-NULL, this callback will be called when the last reference to
+   * this context is unreferenced, immediately before it is freed.
+   *
+   * @note when other objects (e.g an AVHWFramesContext) are derived from this
+   *       struct, this callback will be invoked after all such child objects
+   *       are fully uninitialized and their respective destructors invoked.
+   */
+  void (*free)(struct AVHWDeviceContext* ctx);
+
+  /**
+   * Arbitrary user data, to be used e.g. by the free() callback.
+   */
+  void* user_opaque;
+} AVHWDeviceContext;
+
+/**
+ * This struct describes a set or pool of "hardware" frames (i.e. those with
+ * data not located in normal system memory). All the frames in the pool are
+ * assumed to be allocated in the same way and interchangeable.
+ *
+ * This struct is reference-counted with the AVBuffer mechanism and tied to a
+ * given AVHWDeviceContext instance. The av_hwframe_ctx_alloc() constructor
+ * yields a reference, whose data field points to the actual AVHWFramesContext
+ * struct.
+ */
+typedef struct AVHWFramesContext {
+  /**
+   * A class for logging.
+   */
+  const AVClass* av_class;
+
+  /**
+   * A reference to the parent AVHWDeviceContext. This reference is owned and
+   * managed by the enclosing AVHWFramesContext, but the caller may derive
+   * additional references from it.
+   */
+  AVBufferRef* device_ref;
+
+  /**
+   * The parent AVHWDeviceContext. This is simply a pointer to
+   * device_ref->data provided for convenience.
+   *
+   * Set by libavutil in av_hwframe_ctx_init().
+   */
+  AVHWDeviceContext* device_ctx;
+
+  /**
+   * The format-specific data, allocated and freed automatically along with
+   * this context.
+   *
+   * The user shall ignore this field if the corresponding format-specific
+   * header (hwcontext_*.h) does not define a context to be used as
+   * AVHWFramesContext.hwctx.
+   *
+   * Otherwise, it should be cast by the user to said context and filled
+   * as described in the documentation before calling av_hwframe_ctx_init().
+   *
+   * After any frames using this context are created, the contents of this
+   * struct should not be modified by the caller.
+   */
+  void* hwctx;
+
+  /**
+   * This field may be set by the caller before calling av_hwframe_ctx_init().
+   *
+   * If non-NULL, this callback will be called when the last reference to
+   * this context is unreferenced, immediately before it is freed.
+   */
+  void (*free)(struct AVHWFramesContext* ctx);
+
+  /**
+   * Arbitrary user data, to be used e.g. by the free() callback.
+   */
+  void* user_opaque;
+
+  /**
+   * A pool from which the frames are allocated by av_hwframe_get_buffer().
+   * This field may be set by the caller before calling av_hwframe_ctx_init().
+   * The buffers returned by calling av_buffer_pool_get() on this pool must
+   * have the properties described in the documentation in the corresponding hw
+   * type's header (hwcontext_*.h). The pool will be freed strictly before
+   * this struct's free() callback is invoked.
+   *
+   * This field may be NULL, then libavutil will attempt to allocate a pool
+   * internally. Note that certain device types enforce pools allocated at
+   * fixed size (frame count), which cannot be extended dynamically. In such a
+   * case, initial_pool_size must be set appropriately.
+   */
+  AVBufferPool* pool;
+
+  /**
+   * Initial size of the frame pool. If a device type does not support
+   * dynamically resizing the pool, then this is also the maximum pool size.
+   *
+   * May be set by the caller before calling av_hwframe_ctx_init(). Must be
+   * set if pool is NULL and the device type does not support dynamic pools.
+   */
+  int initial_pool_size;
+
+  /**
+   * The pixel format identifying the underlying HW surface type.
+   *
+   * Must be a hwaccel format, i.e. the corresponding descriptor must have the
+   * AV_PIX_FMT_FLAG_HWACCEL flag set.
+   *
+   * Must be set by the user before calling av_hwframe_ctx_init().
+   */
+  enum AVPixelFormat format;
+
+  /**
+   * The pixel format identifying the actual data layout of the hardware
+   * frames.
+   *
+   * Must be set by the caller before calling av_hwframe_ctx_init().
+   *
+   * @note when the underlying API does not provide the exact data layout, but
+   * only the colorspace/bit depth, this field should be set to the fully
+   * planar version of that format (e.g. for 8-bit 420 YUV it should be
+   * AV_PIX_FMT_YUV420P, not AV_PIX_FMT_NV12 or anything else).
+   */
+  enum AVPixelFormat sw_format;
+
+  /**
+   * The allocated dimensions of the frames in this pool.
+   *
+   * Must be set by the user before calling av_hwframe_ctx_init().
+   */
+  int width, height;
+} AVHWFramesContext;
+
+/**
+ * Look up an AVHWDeviceType by name.
+ *
+ * @param name String name of the device type (case-insensitive).
+ * @return The type from enum AVHWDeviceType, or AV_HWDEVICE_TYPE_NONE if
+ *         not found.
+ */
+enum AVHWDeviceType av_hwdevice_find_type_by_name(const char* name);
+
+/** Get the string name of an AVHWDeviceType.
+ *
+ * @param type Type from enum AVHWDeviceType.
+ * @return Pointer to a static string containing the name, or NULL if the type
+ *         is not valid.
+ */
+const char* av_hwdevice_get_type_name(enum AVHWDeviceType type);
+
+/**
+ * Iterate over supported device types.
+ *
+ * @param prev AV_HWDEVICE_TYPE_NONE initially, then the previous type
+ *             returned by this function in subsequent iterations.
+ * @return The next usable device type from enum AVHWDeviceType, or
+ *         AV_HWDEVICE_TYPE_NONE if there are no more.
+ */
+enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev);
+
+/**
+ * Allocate an AVHWDeviceContext for a given hardware type.
+ *
+ * @param type the type of the hardware device to allocate.
+ * @return a reference to the newly created AVHWDeviceContext on success or NULL
+ *         on failure.
+ */
+AVBufferRef* av_hwdevice_ctx_alloc(enum AVHWDeviceType type);
+
+/**
+ * Finalize the device context before use. This function must be called after
+ * the context is filled with all the required information and before it is
+ * used in any way.
+ *
+ * @param ref a reference to the AVHWDeviceContext
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwdevice_ctx_init(AVBufferRef* ref);
+
+/**
+ * Open a device of the specified type and create an AVHWDeviceContext for it.
+ *
+ * This is a convenience function intended to cover the simple cases. Callers
+ * who need to fine-tune device creation/management should open the device
+ * manually and then wrap it in an AVHWDeviceContext using
+ * av_hwdevice_ctx_alloc()/av_hwdevice_ctx_init().
+ *
+ * The returned context is already initialized and ready for use, the caller
+ * should not call av_hwdevice_ctx_init() on it. The user_opaque/free fields of
+ * the created AVHWDeviceContext are set by this function and should not be
+ * touched by the caller.
+ *
+ * @param device_ctx On success, a reference to the newly-created device context
+ *                   will be written here. The reference is owned by the caller
+ *                   and must be released with av_buffer_unref() when no longer
+ *                   needed. On failure, NULL will be written to this pointer.
+ * @param type The type of the device to create.
+ * @param device A type-specific string identifying the device to open.
+ * @param opts A dictionary of additional (type-specific) options to use in
+ *             opening the device. The dictionary remains owned by the caller.
+ * @param flags currently unused
+ *
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create(AVBufferRef** device_ctx, enum AVHWDeviceType type,
+                           const char* device, AVDictionary* opts, int flags);
+
+/**
+ * Create a new device of the specified type from an existing device.
+ *
+ * If the source device is a device of the target type or was originally
+ * derived from such a device (possibly through one or more intermediate
+ * devices of other types), then this will return a reference to the
+ * existing device of the same type as is requested.
+ *
+ * Otherwise, it will attempt to derive a new device from the given source
+ * device.  If direct derivation to the new type is not implemented, it will
+ * attempt the same derivation from each ancestor of the source device in
+ * turn looking for an implemented derivation method.
+ *
+ * @param dst_ctx On success, a reference to the newly-created
+ *                AVHWDeviceContext.
+ * @param type    The type of the new device to create.
+ * @param src_ctx A reference to an existing AVHWDeviceContext which will be
+ *                used to create the new device.
+ * @param flags   Currently unused; should be set to zero.
+ * @return        Zero on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create_derived(AVBufferRef** dst_ctx,
+                                   enum AVHWDeviceType type,
+                                   AVBufferRef* src_ctx, int flags);
+
+/**
+ * Create a new device of the specified type from an existing device.
+ *
+ * This function performs the same action as av_hwdevice_ctx_create_derived,
+ * however, it is able to set options for the new device to be derived.
+ *
+ * @param dst_ctx On success, a reference to the newly-created
+ *                AVHWDeviceContext.
+ * @param type    The type of the new device to create.
+ * @param src_ctx A reference to an existing AVHWDeviceContext which will be
+ *                used to create the new device.
+ * @param options Options for the new device to create, same format as in
+ *                av_hwdevice_ctx_create.
+ * @param flags   Currently unused; should be set to zero.
+ * @return        Zero on success, a negative AVERROR code on failure.
+ */
+int av_hwdevice_ctx_create_derived_opts(AVBufferRef** dst_ctx,
+                                        enum AVHWDeviceType type,
+                                        AVBufferRef* src_ctx,
+                                        AVDictionary* options, int flags);
+
+/**
+ * Allocate an AVHWFramesContext tied to a given device context.
+ *
+ * @param device_ctx a reference to a AVHWDeviceContext. This function will make
+ *                   a new reference for internal use, the one passed to the
+ *                   function remains owned by the caller.
+ * @return a reference to the newly created AVHWFramesContext on success or NULL
+ *         on failure.
+ */
+AVBufferRef* av_hwframe_ctx_alloc(AVBufferRef* device_ctx);
+
+/**
+ * Finalize the context before use. This function must be called after the
+ * context is filled with all the required information and before it is attached
+ * to any frames.
+ *
+ * @param ref a reference to the AVHWFramesContext
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwframe_ctx_init(AVBufferRef* ref);
+
+/**
+ * Allocate a new frame attached to the given AVHWFramesContext.
+ *
+ * @param hwframe_ctx a reference to an AVHWFramesContext
+ * @param frame an empty (freshly allocated or unreffed) frame to be filled with
+ *              newly allocated buffers.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR code on failure
+ */
+int av_hwframe_get_buffer(AVBufferRef* hwframe_ctx, AVFrame* frame, int flags);
+
+/**
+ * Copy data to or from a hw surface. At least one of dst/src must have an
+ * AVHWFramesContext attached.
+ *
+ * If src has an AVHWFramesContext attached, then the format of dst (if set)
+ * must use one of the formats returned by av_hwframe_transfer_get_formats(src,
+ * AV_HWFRAME_TRANSFER_DIRECTION_FROM).
+ * If dst has an AVHWFramesContext attached, then the format of src must use one
+ * of the formats returned by av_hwframe_transfer_get_formats(dst,
+ * AV_HWFRAME_TRANSFER_DIRECTION_TO)
+ *
+ * dst may be "clean" (i.e. with data/buf pointers unset), in which case the
+ * data buffers will be allocated by this function using av_frame_get_buffer().
+ * If dst->format is set, then this format will be used, otherwise (when
+ * dst->format is AV_PIX_FMT_NONE) the first acceptable format will be chosen.
+ *
+ * The two frames must have matching allocated dimensions (i.e. equal to
+ * AVHWFramesContext.width/height), since not all device types support
+ * transferring a sub-rectangle of the whole surface. The display dimensions
+ * (i.e. AVFrame.width/height) may be smaller than the allocated dimensions, but
+ * also have to be equal for both frames. When the display dimensions are
+ * smaller than the allocated dimensions, the content of the padding in the
+ * destination frame is unspecified.
+ *
+ * @param dst the destination frame. dst is not touched on failure.
+ * @param src the source frame.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR error code on failure.
+ */
+int av_hwframe_transfer_data(AVFrame* dst, const AVFrame* src, int flags);
+
+enum AVHWFrameTransferDirection {
+  /**
+   * Transfer the data from the queried hw frame.
+   */
+  AV_HWFRAME_TRANSFER_DIRECTION_FROM,
+
+  /**
+   * Transfer the data to the queried hw frame.
+   */
+  AV_HWFRAME_TRANSFER_DIRECTION_TO,
+};
+
+/**
+ * Get a list of possible source or target formats usable in
+ * av_hwframe_transfer_data().
+ *
+ * @param hwframe_ctx the frame context to obtain the information for
+ * @param dir the direction of the transfer
+ * @param formats the pointer to the output format list will be written here.
+ *                The list is terminated with AV_PIX_FMT_NONE and must be freed
+ *                by the caller when no longer needed using av_free().
+ *                If this function returns successfully, the format list will
+ *                have at least one item (not counting the terminator).
+ *                On failure, the contents of this pointer are unspecified.
+ * @param flags currently unused, should be set to zero
+ * @return 0 on success, a negative AVERROR code on failure.
+ */
+int av_hwframe_transfer_get_formats(AVBufferRef* hwframe_ctx,
+                                    enum AVHWFrameTransferDirection dir,
+                                    enum AVPixelFormat** formats, int flags);
+
+/**
+ * This struct describes the constraints on hardware frames attached to
+ * a given device with a hardware-specific configuration.  This is returned
+ * by av_hwdevice_get_hwframe_constraints() and must be freed by
+ * av_hwframe_constraints_free() after use.
+ */
+typedef struct AVHWFramesConstraints {
+  /**
+   * A list of possible values for format in the hw_frames_ctx,
+   * terminated by AV_PIX_FMT_NONE.  This member will always be filled.
+   */
+  enum AVPixelFormat* valid_hw_formats;
+
+  /**
+   * A list of possible values for sw_format in the hw_frames_ctx,
+   * terminated by AV_PIX_FMT_NONE.  Can be NULL if this information is
+   * not known.
+   */
+  enum AVPixelFormat* valid_sw_formats;
+
+  /**
+   * The minimum size of frames in this hw_frames_ctx.
+   * (Zero if not known.)
+   */
+  int min_width;
+  int min_height;
+
+  /**
+   * The maximum size of frames in this hw_frames_ctx.
+   * (INT_MAX if not known / no limit.)
+   */
+  int max_width;
+  int max_height;
+} AVHWFramesConstraints;
+
+/**
+ * Allocate a HW-specific configuration structure for a given HW device.
+ * After use, the user must free all members as required by the specific
+ * hardware structure being used, then free the structure itself with
+ * av_free().
+ *
+ * @param device_ctx a reference to the associated AVHWDeviceContext.
+ * @return The newly created HW-specific configuration structure on
+ *         success or NULL on failure.
+ */
+void* av_hwdevice_hwconfig_alloc(AVBufferRef* device_ctx);
+
+/**
+ * Get the constraints on HW frames given a device and the HW-specific
+ * configuration to be used with that device.  If no HW-specific
+ * configuration is provided, returns the maximum possible capabilities
+ * of the device.
+ *
+ * @param ref a reference to the associated AVHWDeviceContext.
+ * @param hwconfig a filled HW-specific configuration structure, or NULL
+ *        to return the maximum possible capabilities of the device.
+ * @return AVHWFramesConstraints structure describing the constraints
+ *         on the device, or NULL if not available.
+ */
+AVHWFramesConstraints* av_hwdevice_get_hwframe_constraints(
+    AVBufferRef* ref, const void* hwconfig);
+
+/**
+ * Free an AVHWFrameConstraints structure.
+ *
+ * @param constraints The (filled or unfilled) AVHWFrameConstraints structure.
+ */
+void av_hwframe_constraints_free(AVHWFramesConstraints** constraints);
+
+/**
+ * Flags to apply to frame mappings.
+ */
+enum {
+  /**
+   * The mapping must be readable.
+   */
+  AV_HWFRAME_MAP_READ = 1 << 0,
+  /**
+   * The mapping must be writeable.
+   */
+  AV_HWFRAME_MAP_WRITE = 1 << 1,
+  /**
+   * The mapped frame will be overwritten completely in subsequent
+   * operations, so the current frame data need not be loaded.  Any values
+   * which are not overwritten are unspecified.
+   */
+  AV_HWFRAME_MAP_OVERWRITE = 1 << 2,
+  /**
+   * The mapping must be direct.  That is, there must not be any copying in
+   * the map or unmap steps.  Note that performance of direct mappings may
+   * be much lower than normal memory.
+   */
+  AV_HWFRAME_MAP_DIRECT = 1 << 3,
+};
+
+/**
+ * Map a hardware frame.
+ *
+ * This has a number of different possible effects, depending on the format
+ * and origin of the src and dst frames.  On input, src should be a usable
+ * frame with valid buffers and dst should be blank (typically as just created
+ * by av_frame_alloc()).  src should have an associated hwframe context, and
+ * dst may optionally have a format and associated hwframe context.
+ *
+ * If src was created by mapping a frame from the hwframe context of dst,
+ * then this function undoes the mapping - dst is replaced by a reference to
+ * the frame that src was originally mapped from.
+ *
+ * If both src and dst have an associated hwframe context, then this function
+ * attempts to map the src frame from its hardware context to that of dst and
+ * then fill dst with appropriate data to be usable there.  This will only be
+ * possible if the hwframe contexts and associated devices are compatible -
+ * given compatible devices, av_hwframe_ctx_create_derived() can be used to
+ * create a hwframe context for dst in which mapping should be possible.
+ *
+ * If src has a hwframe context but dst does not, then the src frame is
+ * mapped to normal memory and should thereafter be usable as a normal frame.
+ * If the format is set on dst, then the mapping will attempt to create dst
+ * with that format and fail if it is not possible.  If format is unset (is
+ * AV_PIX_FMT_NONE) then dst will be mapped with whatever the most appropriate
+ * format to use is (probably the sw_format of the src hwframe context).
+ *
+ * A return value of AVERROR(ENOSYS) indicates that the mapping is not
+ * possible with the given arguments and hwframe setup, while other return
+ * values indicate that it failed somehow.
+ *
+ * On failure, the destination frame will be left blank, except for the
+ * hw_frames_ctx/format fields thay may have been set by the caller - those will
+ * be preserved as they were.
+ *
+ * @param dst Destination frame, to contain the mapping.
+ * @param src Source frame, to be mapped.
+ * @param flags Some combination of AV_HWFRAME_MAP_* flags.
+ * @return Zero on success, negative AVERROR code on failure.
+ */
+int av_hwframe_map(AVFrame* dst, const AVFrame* src, int flags);
+
+/**
+ * Create and initialise an AVHWFramesContext as a mapping of another existing
+ * AVHWFramesContext on a different device.
+ *
+ * av_hwframe_ctx_init() should not be called after this.
+ *
+ * @param derived_frame_ctx  On success, a reference to the newly created
+ *                           AVHWFramesContext.
+ * @param format             The AVPixelFormat for the derived context.
+ * @param derived_device_ctx A reference to the device to create the new
+ *                           AVHWFramesContext on.
+ * @param source_frame_ctx   A reference to an existing AVHWFramesContext
+ *                           which will be mapped to the derived context.
+ * @param flags  Some combination of AV_HWFRAME_MAP_* flags, defining the
+ *               mapping parameters to apply to frames which are allocated
+ *               in the derived device.
+ * @return       Zero on success, negative AVERROR code on failure.
+ */
+int av_hwframe_ctx_create_derived(AVBufferRef** derived_frame_ctx,
+                                  enum AVPixelFormat format,
+                                  AVBufferRef* derived_device_ctx,
+                                  AVBufferRef* source_frame_ctx, int flags);
+
+#endif /* AVUTIL_HWCONTEXT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_drm.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_drm.h
new file mode 100644
index 0000000000..8d8a651b48
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_drm.h
@@ -0,0 +1,169 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_DRM_H
+#define AVUTIL_HWCONTEXT_DRM_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * @file
+ * API-specific header for AV_HWDEVICE_TYPE_DRM.
+ *
+ * Internal frame allocation is not currently supported - all frames
+ * must be allocated by the user.  Thus AVHWFramesContext is always
+ * NULL, though this may change if support for frame allocation is
+ * added in future.
+ */
+
+enum {
+  /**
+   * The maximum number of layers/planes in a DRM frame.
+   */
+  AV_DRM_MAX_PLANES = 4
+};
+
+/**
+ * DRM object descriptor.
+ *
+ * Describes a single DRM object, addressing it as a PRIME file
+ * descriptor.
+ */
+typedef struct AVDRMObjectDescriptor {
+  /**
+   * DRM PRIME fd for the object.
+   */
+  int fd;
+  /**
+   * Total size of the object.
+   *
+   * (This includes any parts not which do not contain image data.)
+   */
+  size_t size;
+  /**
+   * Format modifier applied to the object (DRM_FORMAT_MOD_*).
+   *
+   * If the format modifier is unknown then this should be set to
+   * DRM_FORMAT_MOD_INVALID.
+   */
+  uint64_t format_modifier;
+} AVDRMObjectDescriptor;
+
+/**
+ * DRM plane descriptor.
+ *
+ * Describes a single plane of a layer, which is contained within
+ * a single object.
+ */
+typedef struct AVDRMPlaneDescriptor {
+  /**
+   * Index of the object containing this plane in the objects
+   * array of the enclosing frame descriptor.
+   */
+  int object_index;
+  /**
+   * Offset within that object of this plane.
+   */
+  ptrdiff_t offset;
+  /**
+   * Pitch (linesize) of this plane.
+   */
+  ptrdiff_t pitch;
+} AVDRMPlaneDescriptor;
+
+/**
+ * DRM layer descriptor.
+ *
+ * Describes a single layer within a frame.  This has the structure
+ * defined by its format, and will contain one or more planes.
+ */
+typedef struct AVDRMLayerDescriptor {
+  /**
+   * Format of the layer (DRM_FORMAT_*).
+   */
+  uint32_t format;
+  /**
+   * Number of planes in the layer.
+   *
+   * This must match the number of planes required by format.
+   */
+  int nb_planes;
+  /**
+   * Array of planes in this layer.
+   */
+  AVDRMPlaneDescriptor planes[AV_DRM_MAX_PLANES];
+} AVDRMLayerDescriptor;
+
+/**
+ * DRM frame descriptor.
+ *
+ * This is used as the data pointer for AV_PIX_FMT_DRM_PRIME frames.
+ * It is also used by user-allocated frame pools - allocating in
+ * AVHWFramesContext.pool must return AVBufferRefs which contain
+ * an object of this type.
+ *
+ * The fields of this structure should be set such it can be
+ * imported directly by EGL using the EGL_EXT_image_dma_buf_import
+ * and EGL_EXT_image_dma_buf_import_modifiers extensions.
+ * (Note that the exact layout of a particular format may vary between
+ * platforms - we only specify that the same platform should be able
+ * to import it.)
+ *
+ * The total number of planes must not exceed AV_DRM_MAX_PLANES, and
+ * the order of the planes by increasing layer index followed by
+ * increasing plane index must be the same as the order which would
+ * be used for the data pointers in the equivalent software format.
+ */
+typedef struct AVDRMFrameDescriptor {
+  /**
+   * Number of DRM objects making up this frame.
+   */
+  int nb_objects;
+  /**
+   * Array of objects making up the frame.
+   */
+  AVDRMObjectDescriptor objects[AV_DRM_MAX_PLANES];
+  /**
+   * Number of layers in the frame.
+   */
+  int nb_layers;
+  /**
+   * Array of layers in the frame.
+   */
+  AVDRMLayerDescriptor layers[AV_DRM_MAX_PLANES];
+} AVDRMFrameDescriptor;
+
+/**
+ * DRM device.
+ *
+ * Allocated as AVHWDeviceContext.hwctx.
+ */
+typedef struct AVDRMDeviceContext {
+  /**
+   * File descriptor of DRM device.
+   *
+   * This is used as the device to create frames on, and may also be
+   * used in some derivation and mapping operations.
+   *
+   * If no device is required, set to -1.
+   */
+  int fd;
+} AVDRMDeviceContext;
+
+#endif /* AVUTIL_HWCONTEXT_DRM_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_vaapi.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_vaapi.h
new file mode 100644
index 0000000000..058b5f110d
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/hwcontext_vaapi.h
@@ -0,0 +1,117 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_VAAPI_H
+#define AVUTIL_HWCONTEXT_VAAPI_H
+
+#include <va/va.h>
+
+/**
+ * @file
+ * API-specific header for AV_HWDEVICE_TYPE_VAAPI.
+ *
+ * Dynamic frame pools are supported, but note that any pool used as a render
+ * target is required to be of fixed size in order to be be usable as an
+ * argument to vaCreateContext().
+ *
+ * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
+ * with the data pointer set to a VASurfaceID.
+ */
+
+enum {
+  /**
+   * The quirks field has been set by the user and should not be detected
+   * automatically by av_hwdevice_ctx_init().
+   */
+  AV_VAAPI_DRIVER_QUIRK_USER_SET = (1 << 0),
+  /**
+   * The driver does not destroy parameter buffers when they are used by
+   * vaRenderPicture().  Additional code will be required to destroy them
+   * separately afterwards.
+   */
+  AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS = (1 << 1),
+
+  /**
+   * The driver does not support the VASurfaceAttribMemoryType attribute,
+   * so the surface allocation code will not try to use it.
+   */
+  AV_VAAPI_DRIVER_QUIRK_ATTRIB_MEMTYPE = (1 << 2),
+
+  /**
+   * The driver does not support surface attributes at all.
+   * The surface allocation code will never pass them to surface allocation,
+   * and the results of the vaQuerySurfaceAttributes() call will be faked.
+   */
+  AV_VAAPI_DRIVER_QUIRK_SURFACE_ATTRIBUTES = (1 << 3),
+};
+
+/**
+ * VAAPI connection details.
+ *
+ * Allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVVAAPIDeviceContext {
+  /**
+   * The VADisplay handle, to be filled by the user.
+   */
+  VADisplay display;
+  /**
+   * Driver quirks to apply - this is filled by av_hwdevice_ctx_init(),
+   * with reference to a table of known drivers, unless the
+   * AV_VAAPI_DRIVER_QUIRK_USER_SET bit is already present.  The user
+   * may need to refer to this field when performing any later
+   * operations using VAAPI with the same VADisplay.
+   */
+  unsigned int driver_quirks;
+} AVVAAPIDeviceContext;
+
+/**
+ * VAAPI-specific data associated with a frame pool.
+ *
+ * Allocated as AVHWFramesContext.hwctx.
+ */
+typedef struct AVVAAPIFramesContext {
+  /**
+   * Set by the user to apply surface attributes to all surfaces in
+   * the frame pool.  If null, default settings are used.
+   */
+  VASurfaceAttrib* attributes;
+  int nb_attributes;
+  /**
+   * The surfaces IDs of all surfaces in the pool after creation.
+   * Only valid if AVHWFramesContext.initial_pool_size was positive.
+   * These are intended to be used as the render_targets arguments to
+   * vaCreateContext().
+   */
+  VASurfaceID* surface_ids;
+  int nb_surfaces;
+} AVVAAPIFramesContext;
+
+/**
+ * VAAPI hardware pipeline configuration details.
+ *
+ * Allocated with av_hwdevice_hwconfig_alloc().
+ */
+typedef struct AVVAAPIHWConfig {
+  /**
+   * ID of a VAAPI pipeline configuration.
+   */
+  VAConfigID config_id;
+} AVVAAPIHWConfig;
+
+#endif /* AVUTIL_HWCONTEXT_VAAPI_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/intfloat.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/intfloat.h
new file mode 100644
index 0000000000..f373c97796
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/intfloat.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2011 Mans Rullgard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_INTFLOAT_H
+#define AVUTIL_INTFLOAT_H
+
+#include <stdint.h>
+#include "attributes.h"
+
+union av_intfloat32 {
+  uint32_t i;
+  float f;
+};
+
+union av_intfloat64 {
+  uint64_t i;
+  double f;
+};
+
+/**
+ * Reinterpret a 32-bit integer as a float.
+ */
+static av_always_inline float av_int2float(uint32_t i) {
+  union av_intfloat32 v;
+  v.i = i;
+  return v.f;
+}
+
+/**
+ * Reinterpret a float as a 32-bit integer.
+ */
+static av_always_inline uint32_t av_float2int(float f) {
+  union av_intfloat32 v;
+  v.f = f;
+  return v.i;
+}
+
+/**
+ * Reinterpret a 64-bit integer as a double.
+ */
+static av_always_inline double av_int2double(uint64_t i) {
+  union av_intfloat64 v;
+  v.i = i;
+  return v.f;
+}
+
+/**
+ * Reinterpret a double as a 64-bit integer.
+ */
+static av_always_inline uint64_t av_double2int(double f) {
+  union av_intfloat64 v;
+  v.f = f;
+  return v.i;
+}
+
+#endif /* AVUTIL_INTFLOAT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/log.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/log.h
new file mode 100644
index 0000000000..e1f2af7b18
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/log.h
@@ -0,0 +1,388 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_LOG_H
+#define AVUTIL_LOG_H
+
+#include <stdarg.h>
+#include "attributes.h"
+#include "version.h"
+
+typedef enum {
+  AV_CLASS_CATEGORY_NA = 0,
+  AV_CLASS_CATEGORY_INPUT,
+  AV_CLASS_CATEGORY_OUTPUT,
+  AV_CLASS_CATEGORY_MUXER,
+  AV_CLASS_CATEGORY_DEMUXER,
+  AV_CLASS_CATEGORY_ENCODER,
+  AV_CLASS_CATEGORY_DECODER,
+  AV_CLASS_CATEGORY_FILTER,
+  AV_CLASS_CATEGORY_BITSTREAM_FILTER,
+  AV_CLASS_CATEGORY_SWSCALER,
+  AV_CLASS_CATEGORY_SWRESAMPLER,
+  AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT = 40,
+  AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
+  AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT,
+  AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT,
+  AV_CLASS_CATEGORY_DEVICE_OUTPUT,
+  AV_CLASS_CATEGORY_DEVICE_INPUT,
+  AV_CLASS_CATEGORY_NB  ///< not part of ABI/API
+} AVClassCategory;
+
+#define AV_IS_INPUT_DEVICE(category)                       \
+  (((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT) || \
+   ((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_INPUT) || \
+   ((category) == AV_CLASS_CATEGORY_DEVICE_INPUT))
+
+#define AV_IS_OUTPUT_DEVICE(category)                       \
+  (((category) == AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT) || \
+   ((category) == AV_CLASS_CATEGORY_DEVICE_AUDIO_OUTPUT) || \
+   ((category) == AV_CLASS_CATEGORY_DEVICE_OUTPUT))
+
+struct AVOptionRanges;
+
+/**
+ * Describe the class of an AVClass context structure. That is an
+ * arbitrary struct of which the first field is a pointer to an
+ * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
+ */
+typedef struct AVClass {
+  /**
+   * The name of the class; usually it is the same name as the
+   * context structure type to which the AVClass is associated.
+   */
+  const char* class_name;
+
+  /**
+   * A pointer to a function which returns the name of a context
+   * instance ctx associated with the class.
+   */
+  const char* (*item_name)(void* ctx);
+
+  /**
+   * a pointer to the first option specified in the class if any or NULL
+   *
+   * @see av_set_default_options()
+   */
+  const struct AVOption* option;
+
+  /**
+   * LIBAVUTIL_VERSION with which this structure was created.
+   * This is used to allow fields to be added without requiring major
+   * version bumps everywhere.
+   */
+
+  int version;
+
+  /**
+   * Offset in the structure where log_level_offset is stored.
+   * 0 means there is no such variable
+   */
+  int log_level_offset_offset;
+
+  /**
+   * Offset in the structure where a pointer to the parent context for
+   * logging is stored. For example a decoder could pass its AVCodecContext
+   * to eval as such a parent context, which an av_log() implementation
+   * could then leverage to display the parent context.
+   * The offset can be NULL.
+   */
+  int parent_log_context_offset;
+
+  /**
+   * Category used for visualization (like color)
+   * This is only set if the category is equal for all objects using this class.
+   * available since version (51 << 16 | 56 << 8 | 100)
+   */
+  AVClassCategory category;
+
+  /**
+   * Callback to return the category.
+   * available since version (51 << 16 | 59 << 8 | 100)
+   */
+  AVClassCategory (*get_category)(void* ctx);
+
+  /**
+   * Callback to return the supported/allowed ranges.
+   * available since version (52.12)
+   */
+  int (*query_ranges)(struct AVOptionRanges**, void* obj, const char* key,
+                      int flags);
+
+  /**
+   * Return next AVOptions-enabled child or NULL
+   */
+  void* (*child_next)(void* obj, void* prev);
+
+  /**
+   * Iterate over the AVClasses corresponding to potential AVOptions-enabled
+   * children.
+   *
+   * @param iter pointer to opaque iteration state. The caller must initialize
+   *             *iter to NULL before the first call.
+   * @return AVClass for the next AVOptions-enabled child or NULL if there are
+   *         no more such children.
+   *
+   * @note The difference between child_next and this is that child_next
+   *       iterates over _already existing_ objects, while child_class_iterate
+   *       iterates over _all possible_ children.
+   */
+  const struct AVClass* (*child_class_iterate)(void** iter);
+} AVClass;
+
+/**
+ * @addtogroup lavu_log
+ *
+ * @{
+ *
+ * @defgroup lavu_log_constants Logging Constants
+ *
+ * @{
+ */
+
+/**
+ * Print no output.
+ */
+#define AV_LOG_QUIET -8
+
+/**
+ * Something went really wrong and we will crash now.
+ */
+#define AV_LOG_PANIC 0
+
+/**
+ * Something went wrong and recovery is not possible.
+ * For example, no header was found for a format which depends
+ * on headers or an illegal combination of parameters is used.
+ */
+#define AV_LOG_FATAL 8
+
+/**
+ * Something went wrong and cannot losslessly be recovered.
+ * However, not all future data is affected.
+ */
+#define AV_LOG_ERROR 16
+
+/**
+ * Something somehow does not look correct. This may or may not
+ * lead to problems. An example would be the use of '-vstrict -2'.
+ */
+#define AV_LOG_WARNING 24
+
+/**
+ * Standard information.
+ */
+#define AV_LOG_INFO 32
+
+/**
+ * Detailed information.
+ */
+#define AV_LOG_VERBOSE 40
+
+/**
+ * Stuff which is only useful for libav* developers.
+ */
+#define AV_LOG_DEBUG 48
+
+/**
+ * Extremely verbose debugging, useful for libav* development.
+ */
+#define AV_LOG_TRACE 56
+
+#define AV_LOG_MAX_OFFSET (AV_LOG_TRACE - AV_LOG_QUIET)
+
+/**
+ * @}
+ */
+
+/**
+ * Sets additional colors for extended debugging sessions.
+ * @code
+   av_log(ctx, AV_LOG_DEBUG|AV_LOG_C(134), "Message in purple\n");
+   @endcode
+ * Requires 256color terminal support. Uses outside debugging is not
+ * recommended.
+ */
+#define AV_LOG_C(x) ((x) << 8)
+
+/**
+ * Send the specified message to the log if the level is less than or equal
+ * to the current av_log_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log_set_callback
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct or NULL if general log.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ */
+void av_log(void* avcl, int level, const char* fmt, ...) av_printf_format(3, 4);
+
+/**
+ * Send the specified message to the log once with the initial_level and then
+ * with the subsequent_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct or NULL if general log.
+ * @param initial_level importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant" for the first occurance.
+ * @param subsequent_level importance level of the message expressed using a
+ * @ref lavu_log_constants "Logging Constant" after the first occurance.
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param state a variable to keep trak of if a message has already been printed
+ *        this must be initialized to 0 before the first use. The same state
+ *        must not be accessed by 2 Threads simultaneously.
+ */
+void av_log_once(void* avcl, int initial_level, int subsequent_level,
+                 int* state, const char* fmt, ...) av_printf_format(5, 6);
+
+/**
+ * Send the specified message to the log if the level is less than or equal
+ * to the current av_log_level. By default, all logging messages are sent to
+ * stderr. This behavior can be altered by setting a different logging callback
+ * function.
+ * @see av_log_set_callback
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param vl The arguments referenced by the format string.
+ */
+void av_vlog(void* avcl, int level, const char* fmt, va_list vl);
+
+/**
+ * Get the current log level
+ *
+ * @see lavu_log_constants
+ *
+ * @return Current log level
+ */
+int av_log_get_level(void);
+
+/**
+ * Set the log level
+ *
+ * @see lavu_log_constants
+ *
+ * @param level Logging level
+ */
+void av_log_set_level(int level);
+
+/**
+ * Set the logging callback
+ *
+ * @note The callback must be thread safe, even if the application does not use
+ *       threads itself as some codecs are multithreaded.
+ *
+ * @see av_log_default_callback
+ *
+ * @param callback A logging function with a compatible signature.
+ */
+void av_log_set_callback(void (*callback)(void*, int, const char*, va_list));
+
+/**
+ * Default logging callback
+ *
+ * It prints the message to stderr, optionally colorizing it.
+ *
+ * @param avcl A pointer to an arbitrary struct of which the first field is a
+ *        pointer to an AVClass struct.
+ * @param level The importance level of the message expressed using a @ref
+ *        lavu_log_constants "Logging Constant".
+ * @param fmt The format string (printf-compatible) that specifies how
+ *        subsequent arguments are converted to output.
+ * @param vl The arguments referenced by the format string.
+ */
+void av_log_default_callback(void* avcl, int level, const char* fmt,
+                             va_list vl);
+
+/**
+ * Return the context name
+ *
+ * @param  ctx The AVClass context
+ *
+ * @return The AVClass class_name
+ */
+const char* av_default_item_name(void* ctx);
+AVClassCategory av_default_get_category(void* ptr);
+
+/**
+ * Format a line of log the same way as the default callback.
+ * @param line          buffer to receive the formatted line
+ * @param line_size     size of the buffer
+ * @param print_prefix  used to store whether the prefix must be printed;
+ *                      must point to a persistent integer initially set to 1
+ */
+void av_log_format_line(void* ptr, int level, const char* fmt, va_list vl,
+                        char* line, int line_size, int* print_prefix);
+
+/**
+ * Format a line of log the same way as the default callback.
+ * @param line          buffer to receive the formatted line;
+ *                      may be NULL if line_size is 0
+ * @param line_size     size of the buffer; at most line_size-1 characters will
+ *                      be written to the buffer, plus one null terminator
+ * @param print_prefix  used to store whether the prefix must be printed;
+ *                      must point to a persistent integer initially set to 1
+ * @return Returns a negative value if an error occurred, otherwise returns
+ *         the number of characters that would have been written for a
+ *         sufficiently large buffer, not including the terminating null
+ *         character. If the return value is not less than line_size, it means
+ *         that the log message was truncated to fit the buffer.
+ */
+int av_log_format_line2(void* ptr, int level, const char* fmt, va_list vl,
+                        char* line, int line_size, int* print_prefix);
+
+/**
+ * Skip repeated messages, this requires the user app to use av_log() instead of
+ * (f)printf as the 2 would otherwise interfere and lead to
+ * "Last message repeated x times" messages below (f)printf messages with some
+ * bad luck.
+ * Also to receive the last, "last repeated" line if any, the user app must
+ * call av_log(NULL, AV_LOG_QUIET, "%s", ""); at the end
+ */
+#define AV_LOG_SKIP_REPEATED 1
+
+/**
+ * Include the log severity in messages originating from codecs.
+ *
+ * Results in messages such as:
+ * [rawvideo @ 0xDEADBEEF] [error] encode did not produce valid pts
+ */
+#define AV_LOG_PRINT_LEVEL 2
+
+void av_log_set_flags(int arg);
+int av_log_get_flags(void);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_LOG_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/macros.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/macros.h
new file mode 100644
index 0000000000..1578d1a345
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/macros.h
@@ -0,0 +1,87 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu
+ * Utility Preprocessor macros
+ */
+
+#ifndef AVUTIL_MACROS_H
+#define AVUTIL_MACROS_H
+
+#include "libavutil/avconfig.h"
+
+#if AV_HAVE_BIGENDIAN
+#  define AV_NE(be, le) (be)
+#else
+#  define AV_NE(be, le) (le)
+#endif
+
+/**
+ * Comparator.
+ * For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0
+ * if x == y. This is useful for instance in a qsort comparator callback.
+ * Furthermore, compilers are able to optimize this to branchless code, and
+ * there is no risk of overflow with signed types.
+ * As with many macros, this evaluates its argument multiple times, it thus
+ * must not have a side-effect.
+ */
+#define FFDIFFSIGN(x, y) (((x) > (y)) - ((x) < (y)))
+
+#define FFMAX(a, b) ((a) > (b) ? (a) : (b))
+#define FFMAX3(a, b, c) FFMAX(FFMAX(a, b), c)
+#define FFMIN(a, b) ((a) > (b) ? (b) : (a))
+#define FFMIN3(a, b, c) FFMIN(FFMIN(a, b), c)
+
+#define FFSWAP(type, a, b) \
+  do {                     \
+    type SWAP_tmp = b;     \
+    b = a;                 \
+    a = SWAP_tmp;          \
+  } while (0)
+#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
+
+#define MKTAG(a, b, c, d) \
+  ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
+#define MKBETAG(a, b, c, d) \
+  ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
+
+/**
+ * @addtogroup preproc_misc Preprocessor String Macros
+ *
+ * String manipulation macros
+ *
+ * @{
+ */
+
+#define AV_STRINGIFY(s) AV_TOSTRING(s)
+#define AV_TOSTRING(s) #s
+
+#define AV_GLUE(a, b) a##b
+#define AV_JOIN(a, b) AV_GLUE(a, b)
+
+/**
+ * @}
+ */
+
+#define AV_PRAGMA(s) _Pragma(#s)
+
+#define FFALIGN(x, a) (((x) + (a)-1) & ~((a)-1))
+
+#endif /* AVUTIL_MACROS_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mathematics.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mathematics.h
new file mode 100644
index 0000000000..cab0d080d2
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mathematics.h
@@ -0,0 +1,305 @@
+/*
+ * copyright (c) 2005-2012 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @addtogroup lavu_math
+ * Mathematical utilities for working with timestamp and time base.
+ */
+
+#ifndef AVUTIL_MATHEMATICS_H
+#define AVUTIL_MATHEMATICS_H
+
+#include <stdint.h>
+#include <math.h>
+#include "attributes.h"
+#include "rational.h"
+#include "intfloat.h"
+
+#ifndef M_E
+#  define M_E 2.7182818284590452354 /* e */
+#endif
+#ifndef M_Ef
+#  define M_Ef 2.7182818284590452354f /* e */
+#endif
+#ifndef M_LN2
+#  define M_LN2 0.69314718055994530942 /* log_e 2 */
+#endif
+#ifndef M_LN2f
+#  define M_LN2f 0.69314718055994530942f /* log_e 2 */
+#endif
+#ifndef M_LN10
+#  define M_LN10 2.30258509299404568402 /* log_e 10 */
+#endif
+#ifndef M_LN10f
+#  define M_LN10f 2.30258509299404568402f /* log_e 10 */
+#endif
+#ifndef M_LOG2_10
+#  define M_LOG2_10 3.32192809488736234787 /* log_2 10 */
+#endif
+#ifndef M_LOG2_10f
+#  define M_LOG2_10f 3.32192809488736234787f /* log_2 10 */
+#endif
+#ifndef M_PHI
+#  define M_PHI 1.61803398874989484820 /* phi / golden ratio */
+#endif
+#ifndef M_PHIf
+#  define M_PHIf 1.61803398874989484820f /* phi / golden ratio */
+#endif
+#ifndef M_PI
+#  define M_PI 3.14159265358979323846 /* pi */
+#endif
+#ifndef M_PIf
+#  define M_PIf 3.14159265358979323846f /* pi */
+#endif
+#ifndef M_PI_2
+#  define M_PI_2 1.57079632679489661923 /* pi/2 */
+#endif
+#ifndef M_PI_2f
+#  define M_PI_2f 1.57079632679489661923f /* pi/2 */
+#endif
+#ifndef M_PI_4
+#  define M_PI_4 0.78539816339744830962 /* pi/4 */
+#endif
+#ifndef M_PI_4f
+#  define M_PI_4f 0.78539816339744830962f /* pi/4 */
+#endif
+#ifndef M_1_PI
+#  define M_1_PI 0.31830988618379067154 /* 1/pi */
+#endif
+#ifndef M_1_PIf
+#  define M_1_PIf 0.31830988618379067154f /* 1/pi */
+#endif
+#ifndef M_2_PI
+#  define M_2_PI 0.63661977236758134308 /* 2/pi */
+#endif
+#ifndef M_2_PIf
+#  define M_2_PIf 0.63661977236758134308f /* 2/pi */
+#endif
+#ifndef M_2_SQRTPI
+#  define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */
+#endif
+#ifndef M_2_SQRTPIf
+#  define M_2_SQRTPIf 1.12837916709551257390f /* 2/sqrt(pi) */
+#endif
+#ifndef M_SQRT1_2
+#  define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
+#endif
+#ifndef M_SQRT1_2f
+#  define M_SQRT1_2f 0.70710678118654752440f /* 1/sqrt(2) */
+#endif
+#ifndef M_SQRT2
+#  define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
+#endif
+#ifndef M_SQRT2f
+#  define M_SQRT2f 1.41421356237309504880f /* sqrt(2) */
+#endif
+#ifndef NAN
+#  define NAN av_int2float(0x7fc00000)
+#endif
+#ifndef INFINITY
+#  define INFINITY av_int2float(0x7f800000)
+#endif
+
+/**
+ * @addtogroup lavu_math
+ *
+ * @{
+ */
+
+/**
+ * Rounding methods.
+ */
+enum AVRounding {
+  AV_ROUND_ZERO = 0,  ///< Round toward zero.
+  AV_ROUND_INF = 1,   ///< Round away from zero.
+  AV_ROUND_DOWN = 2,  ///< Round toward -infinity.
+  AV_ROUND_UP = 3,    ///< Round toward +infinity.
+  AV_ROUND_NEAR_INF =
+      5,  ///< Round to nearest and halfway cases away from zero.
+  /**
+   * Flag telling rescaling functions to pass `INT64_MIN`/`MAX` through
+   * unchanged, avoiding special cases for #AV_NOPTS_VALUE.
+   *
+   * Unlike other values of the enumeration AVRounding, this value is a
+   * bitmask that must be used in conjunction with another value of the
+   * enumeration through a bitwise OR, in order to set behavior for normal
+   * cases.
+   *
+   * @code{.c}
+   * av_rescale_rnd(3, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
+   * // Rescaling 3:
+   * //     Calculating 3 * 1 / 2
+   * //     3 / 2 is rounded up to 2
+   * //     => 2
+   *
+   * av_rescale_rnd(AV_NOPTS_VALUE, 1, 2, AV_ROUND_UP | AV_ROUND_PASS_MINMAX);
+   * // Rescaling AV_NOPTS_VALUE:
+   * //     AV_NOPTS_VALUE == INT64_MIN
+   * //     AV_NOPTS_VALUE is passed through
+   * //     => AV_NOPTS_VALUE
+   * @endcode
+   */
+  AV_ROUND_PASS_MINMAX = 8192,
+};
+
+/**
+ * Compute the greatest common divisor of two integer operands.
+ *
+ * @param a Operand
+ * @param b Operand
+ * @return GCD of a and b up to sign; if a >= 0 and b >= 0, return value is >=
+ * 0; if a == 0 and b == 0, returns 0.
+ */
+int64_t av_const av_gcd(int64_t a, int64_t b);
+
+/**
+ * Rescale a 64-bit integer with rounding to nearest.
+ *
+ * The operation is mathematically equivalent to `a * b / c`, but writing that
+ * directly can overflow.
+ *
+ * This function is equivalent to av_rescale_rnd() with #AV_ROUND_NEAR_INF.
+ *
+ * @see av_rescale_rnd(), av_rescale_q(), av_rescale_q_rnd()
+ */
+int64_t av_rescale(int64_t a, int64_t b, int64_t c) av_const;
+
+/**
+ * Rescale a 64-bit integer with specified rounding.
+ *
+ * The operation is mathematically equivalent to `a * b / c`, but writing that
+ * directly can overflow, and does not support different rounding methods.
+ * If the result is not representable then INT64_MIN is returned.
+ *
+ * @see av_rescale(), av_rescale_q(), av_rescale_q_rnd()
+ */
+int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c,
+                       enum AVRounding rnd) av_const;
+
+/**
+ * Rescale a 64-bit integer by 2 rational numbers.
+ *
+ * The operation is mathematically equivalent to `a * bq / cq`.
+ *
+ * This function is equivalent to av_rescale_q_rnd() with #AV_ROUND_NEAR_INF.
+ *
+ * @see av_rescale(), av_rescale_rnd(), av_rescale_q_rnd()
+ */
+int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
+
+/**
+ * Rescale a 64-bit integer by 2 rational numbers with specified rounding.
+ *
+ * The operation is mathematically equivalent to `a * bq / cq`.
+ *
+ * @see av_rescale(), av_rescale_rnd(), av_rescale_q()
+ */
+int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq,
+                         enum AVRounding rnd) av_const;
+
+/**
+ * Compare two timestamps each in its own time base.
+ *
+ * @return One of the following values:
+ *         - -1 if `ts_a` is before `ts_b`
+ *         - 1 if `ts_a` is after `ts_b`
+ *         - 0 if they represent the same position
+ *
+ * @warning
+ * The result of the function is undefined if one of the timestamps is outside
+ * the `int64_t` range when represented in the other's timebase.
+ */
+int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b);
+
+/**
+ * Compare the remainders of two integer operands divided by a common divisor.
+ *
+ * In other words, compare the least significant `log2(mod)` bits of integers
+ * `a` and `b`.
+ *
+ * @code{.c}
+ * av_compare_mod(0x11, 0x02, 0x10) < 0 // since 0x11 % 0x10  (0x1) < 0x02 %
+ * 0x10  (0x2) av_compare_mod(0x11, 0x02, 0x20) > 0 // since 0x11 % 0x20 (0x11)
+ * > 0x02 % 0x20 (0x02)
+ * @endcode
+ *
+ * @param a Operand
+ * @param b Operand
+ * @param mod Divisor; must be a power of 2
+ * @return
+ *         - a negative value if `a % mod < b % mod`
+ *         - a positive value if `a % mod > b % mod`
+ *         - zero             if `a % mod == b % mod`
+ */
+int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod);
+
+/**
+ * Rescale a timestamp while preserving known durations.
+ *
+ * This function is designed to be called per audio packet to scale the input
+ * timestamp to a different time base. Compared to a simple av_rescale_q()
+ * call, this function is robust against possible inconsistent frame durations.
+ *
+ * The `last` parameter is a state variable that must be preserved for all
+ * subsequent calls for the same stream. For the first call, `*last` should be
+ * initialized to #AV_NOPTS_VALUE.
+ *
+ * @param[in]     in_tb    Input time base
+ * @param[in]     in_ts    Input timestamp
+ * @param[in]     fs_tb    Duration time base; typically this is finer-grained
+ *                         (greater) than `in_tb` and `out_tb`
+ * @param[in]     duration Duration till the next call to this function (i.e.
+ *                         duration of the current packet/frame)
+ * @param[in,out] last     Pointer to a timestamp expressed in terms of
+ *                         `fs_tb`, acting as a state variable
+ * @param[in]     out_tb   Output timebase
+ * @return        Timestamp expressed in terms of `out_tb`
+ *
+ * @note In the context of this function, "duration" is in term of samples, not
+ *       seconds.
+ */
+int64_t av_rescale_delta(AVRational in_tb, int64_t in_ts, AVRational fs_tb,
+                         int duration, int64_t* last, AVRational out_tb);
+
+/**
+ * Add a value to a timestamp.
+ *
+ * This function guarantees that when the same value is repeatly added that
+ * no accumulation of rounding errors occurs.
+ *
+ * @param[in] ts     Input timestamp
+ * @param[in] ts_tb  Input timestamp time base
+ * @param[in] inc    Value to be added
+ * @param[in] inc_tb Time base of `inc`
+ */
+int64_t av_add_stable(AVRational ts_tb, int64_t ts, AVRational inc_tb,
+                      int64_t inc);
+
+/**
+ * 0th order modified bessel function of the first kind.
+ */
+double av_bessel_i0(double x);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_MATHEMATICS_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mem.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mem.h
new file mode 100644
index 0000000000..738c6443bf
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/mem.h
@@ -0,0 +1,611 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_mem
+ * Memory handling functions
+ */
+
+#ifndef AVUTIL_MEM_H
+#define AVUTIL_MEM_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "attributes.h"
+
+/**
+ * @addtogroup lavu_mem
+ * Utilities for manipulating memory.
+ *
+ * FFmpeg has several applications of memory that are not required of a typical
+ * program. For example, the computing-heavy components like video decoding and
+ * encoding can be sped up significantly through the use of aligned memory.
+ *
+ * However, for each of FFmpeg's applications of memory, there might not be a
+ * recognized or standardized API for that specific use. Memory alignment, for
+ * instance, varies wildly depending on operating systems, architectures, and
+ * compilers. Hence, this component of @ref libavutil is created to make
+ * dealing with memory consistently possible on all platforms.
+ *
+ * @{
+ */
+
+/**
+ * @defgroup lavu_mem_attrs Function Attributes
+ * Function attributes applicable to memory handling functions.
+ *
+ * These function attributes can help compilers emit more useful warnings, or
+ * generate better code.
+ * @{
+ */
+
+/**
+ * @def av_malloc_attrib
+ * Function attribute denoting a malloc-like function.
+ *
+ * @see <a
+ * href="https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-g_t_0040code_007bmalloc_007d-function-attribute-3251">Function
+ * attribute `malloc` in GCC's documentation</a>
+ */
+
+#if AV_GCC_VERSION_AT_LEAST(3, 1)
+#  define av_malloc_attrib __attribute__((__malloc__))
+#else
+#  define av_malloc_attrib
+#endif
+
+/**
+ * @def av_alloc_size(...)
+ * Function attribute used on a function that allocates memory, whose size is
+ * given by the specified parameter(s).
+ *
+ * @code{.c}
+ * void *av_malloc(size_t size) av_alloc_size(1);
+ * void *av_calloc(size_t nmemb, size_t size) av_alloc_size(1, 2);
+ * @endcode
+ *
+ * @param ... One or two parameter indexes, separated by a comma
+ *
+ * @see <a
+ * href="https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-g_t_0040code_007balloc_005fsize_007d-function-attribute-3220">Function
+ * attribute `alloc_size` in GCC's documentation</a>
+ */
+
+#if AV_GCC_VERSION_AT_LEAST(4, 3)
+#  define av_alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))
+#else
+#  define av_alloc_size(...)
+#endif
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_mem_funcs Heap Management
+ * Functions responsible for allocating, freeing, and copying memory.
+ *
+ * All memory allocation functions have a built-in upper limit of `INT_MAX`
+ * bytes. This may be changed with av_max_alloc(), although exercise extreme
+ * caution when doing so.
+ *
+ * @{
+ */
+
+/**
+ * Allocate a memory block with alignment suitable for all memory accesses
+ * (including vectors if available on the CPU).
+ *
+ * @param size Size in bytes for the memory block to be allocated
+ * @return Pointer to the allocated block, or `NULL` if the block cannot
+ *         be allocated
+ * @see av_mallocz()
+ */
+void* av_malloc(size_t size) av_malloc_attrib av_alloc_size(1);
+
+/**
+ * Allocate a memory block with alignment suitable for all memory accesses
+ * (including vectors if available on the CPU) and zero all the bytes of the
+ * block.
+ *
+ * @param size Size in bytes for the memory block to be allocated
+ * @return Pointer to the allocated block, or `NULL` if it cannot be allocated
+ * @see av_malloc()
+ */
+void* av_mallocz(size_t size) av_malloc_attrib av_alloc_size(1);
+
+/**
+ * Allocate a memory block for an array with av_malloc().
+ *
+ * The allocated memory will have size `size * nmemb` bytes.
+ *
+ * @param nmemb Number of element
+ * @param size  Size of a single element
+ * @return Pointer to the allocated block, or `NULL` if the block cannot
+ *         be allocated
+ * @see av_malloc()
+ */
+av_alloc_size(1, 2) void* av_malloc_array(size_t nmemb, size_t size);
+
+/**
+ * Allocate a memory block for an array with av_mallocz().
+ *
+ * The allocated memory will have size `size * nmemb` bytes.
+ *
+ * @param nmemb Number of elements
+ * @param size  Size of the single element
+ * @return Pointer to the allocated block, or `NULL` if the block cannot
+ *         be allocated
+ *
+ * @see av_mallocz()
+ * @see av_malloc_array()
+ */
+void* av_calloc(size_t nmemb, size_t size) av_malloc_attrib av_alloc_size(1, 2);
+
+/**
+ * Allocate, reallocate, or free a block of memory.
+ *
+ * If `ptr` is `NULL` and `size` > 0, allocate a new block. Otherwise, expand or
+ * shrink that block of memory according to `size`.
+ *
+ * @param ptr  Pointer to a memory block already allocated with
+ *             av_realloc() or `NULL`
+ * @param size Size in bytes of the memory block to be allocated or
+ *             reallocated
+ *
+ * @return Pointer to a newly-reallocated block or `NULL` if the block
+ *         cannot be reallocated
+ *
+ * @warning Unlike av_malloc(), the returned pointer is not guaranteed to be
+ *          correctly aligned. The returned pointer must be freed after even
+ *          if size is zero.
+ * @see av_fast_realloc()
+ * @see av_reallocp()
+ */
+void* av_realloc(void* ptr, size_t size) av_alloc_size(2);
+
+/**
+ * Allocate, reallocate, or free a block of memory through a pointer to a
+ * pointer.
+ *
+ * If `*ptr` is `NULL` and `size` > 0, allocate a new block. If `size` is
+ * zero, free the memory block pointed to by `*ptr`. Otherwise, expand or
+ * shrink that block of memory according to `size`.
+ *
+ * @param[in,out] ptr  Pointer to a pointer to a memory block already allocated
+ *                     with av_realloc(), or a pointer to `NULL`. The pointer
+ *                     is updated on success, or freed on failure.
+ * @param[in]     size Size in bytes for the memory block to be allocated or
+ *                     reallocated
+ *
+ * @return Zero on success, an AVERROR error code on failure
+ *
+ * @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
+ *          correctly aligned.
+ */
+av_warn_unused_result int av_reallocp(void* ptr, size_t size);
+
+/**
+ * Allocate, reallocate, or free a block of memory.
+ *
+ * This function does the same thing as av_realloc(), except:
+ * - It takes two size arguments and allocates `nelem * elsize` bytes,
+ *   after checking the result of the multiplication for integer overflow.
+ * - It frees the input block in case of failure, thus avoiding the memory
+ *   leak with the classic
+ *   @code{.c}
+ *   buf = realloc(buf);
+ *   if (!buf)
+ *       return -1;
+ *   @endcode
+ *   pattern.
+ */
+void* av_realloc_f(void* ptr, size_t nelem, size_t elsize);
+
+/**
+ * Allocate, reallocate, or free an array.
+ *
+ * If `ptr` is `NULL` and `nmemb` > 0, allocate a new block.
+ *
+ * @param ptr   Pointer to a memory block already allocated with
+ *              av_realloc() or `NULL`
+ * @param nmemb Number of elements in the array
+ * @param size  Size of the single element of the array
+ *
+ * @return Pointer to a newly-reallocated block or NULL if the block
+ *         cannot be reallocated
+ *
+ * @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
+ *          correctly aligned. The returned pointer must be freed after even if
+ *          nmemb is zero.
+ * @see av_reallocp_array()
+ */
+av_alloc_size(2, 3) void* av_realloc_array(void* ptr, size_t nmemb,
+                                           size_t size);
+
+/**
+ * Allocate, reallocate an array through a pointer to a pointer.
+ *
+ * If `*ptr` is `NULL` and `nmemb` > 0, allocate a new block.
+ *
+ * @param[in,out] ptr   Pointer to a pointer to a memory block already
+ *                      allocated with av_realloc(), or a pointer to `NULL`.
+ *                      The pointer is updated on success, or freed on failure.
+ * @param[in]     nmemb Number of elements
+ * @param[in]     size  Size of the single element
+ *
+ * @return Zero on success, an AVERROR error code on failure
+ *
+ * @warning Unlike av_malloc(), the allocated memory is not guaranteed to be
+ *          correctly aligned. *ptr must be freed after even if nmemb is zero.
+ */
+int av_reallocp_array(void* ptr, size_t nmemb, size_t size);
+
+/**
+ * Reallocate the given buffer if it is not large enough, otherwise do nothing.
+ *
+ * If the given buffer is `NULL`, then a new uninitialized buffer is allocated.
+ *
+ * If the given buffer is not large enough, and reallocation fails, `NULL` is
+ * returned and `*size` is set to 0, but the original buffer is not changed or
+ * freed.
+ *
+ * A typical use pattern follows:
+ *
+ * @code{.c}
+ * uint8_t *buf = ...;
+ * uint8_t *new_buf = av_fast_realloc(buf, &current_size, size_needed);
+ * if (!new_buf) {
+ *     // Allocation failed; clean up original buffer
+ *     av_freep(&buf);
+ *     return AVERROR(ENOMEM);
+ * }
+ * @endcode
+ *
+ * @param[in,out] ptr      Already allocated buffer, or `NULL`
+ * @param[in,out] size     Pointer to the size of buffer `ptr`. `*size` is
+ *                         updated to the new allocated size, in particular 0
+ *                         in case of failure.
+ * @param[in]     min_size Desired minimal size of buffer `ptr`
+ * @return `ptr` if the buffer is large enough, a pointer to newly reallocated
+ *         buffer if the buffer was not large enough, or `NULL` in case of
+ *         error
+ * @see av_realloc()
+ * @see av_fast_malloc()
+ */
+void* av_fast_realloc(void* ptr, unsigned int* size, size_t min_size);
+
+/**
+ * Allocate a buffer, reusing the given one if large enough.
+ *
+ * Contrary to av_fast_realloc(), the current buffer contents might not be
+ * preserved and on error the old buffer is freed, thus no special handling to
+ * avoid memleaks is necessary.
+ *
+ * `*ptr` is allowed to be `NULL`, in which case allocation always happens if
+ * `size_needed` is greater than 0.
+ *
+ * @code{.c}
+ * uint8_t *buf = ...;
+ * av_fast_malloc(&buf, &current_size, size_needed);
+ * if (!buf) {
+ *     // Allocation failed; buf already freed
+ *     return AVERROR(ENOMEM);
+ * }
+ * @endcode
+ *
+ * @param[in,out] ptr      Pointer to pointer to an already allocated buffer.
+ *                         `*ptr` will be overwritten with pointer to new
+ *                         buffer on success or `NULL` on failure
+ * @param[in,out] size     Pointer to the size of buffer `*ptr`. `*size` is
+ *                         updated to the new allocated size, in particular 0
+ *                         in case of failure.
+ * @param[in]     min_size Desired minimal size of buffer `*ptr`
+ * @see av_realloc()
+ * @see av_fast_mallocz()
+ */
+void av_fast_malloc(void* ptr, unsigned int* size, size_t min_size);
+
+/**
+ * Allocate and clear a buffer, reusing the given one if large enough.
+ *
+ * Like av_fast_malloc(), but all newly allocated space is initially cleared.
+ * Reused buffer is not cleared.
+ *
+ * `*ptr` is allowed to be `NULL`, in which case allocation always happens if
+ * `size_needed` is greater than 0.
+ *
+ * @param[in,out] ptr      Pointer to pointer to an already allocated buffer.
+ *                         `*ptr` will be overwritten with pointer to new
+ *                         buffer on success or `NULL` on failure
+ * @param[in,out] size     Pointer to the size of buffer `*ptr`. `*size` is
+ *                         updated to the new allocated size, in particular 0
+ *                         in case of failure.
+ * @param[in]     min_size Desired minimal size of buffer `*ptr`
+ * @see av_fast_malloc()
+ */
+void av_fast_mallocz(void* ptr, unsigned int* size, size_t min_size);
+
+/**
+ * Free a memory block which has been allocated with a function of av_malloc()
+ * or av_realloc() family.
+ *
+ * @param ptr Pointer to the memory block which should be freed.
+ *
+ * @note `ptr = NULL` is explicitly allowed.
+ * @note It is recommended that you use av_freep() instead, to prevent leaving
+ *       behind dangling pointers.
+ * @see av_freep()
+ */
+void av_free(void* ptr);
+
+/**
+ * Free a memory block which has been allocated with a function of av_malloc()
+ * or av_realloc() family, and set the pointer pointing to it to `NULL`.
+ *
+ * @code{.c}
+ * uint8_t *buf = av_malloc(16);
+ * av_free(buf);
+ * // buf now contains a dangling pointer to freed memory, and accidental
+ * // dereference of buf will result in a use-after-free, which may be a
+ * // security risk.
+ *
+ * uint8_t *buf = av_malloc(16);
+ * av_freep(&buf);
+ * // buf is now NULL, and accidental dereference will only result in a
+ * // NULL-pointer dereference.
+ * @endcode
+ *
+ * @param ptr Pointer to the pointer to the memory block which should be freed
+ * @note `*ptr = NULL` is safe and leads to no action.
+ * @see av_free()
+ */
+void av_freep(void* ptr);
+
+/**
+ * Duplicate a string.
+ *
+ * @param s String to be duplicated
+ * @return Pointer to a newly-allocated string containing a
+ *         copy of `s` or `NULL` if the string cannot be allocated
+ * @see av_strndup()
+ */
+char* av_strdup(const char* s) av_malloc_attrib;
+
+/**
+ * Duplicate a substring of a string.
+ *
+ * @param s   String to be duplicated
+ * @param len Maximum length of the resulting string (not counting the
+ *            terminating byte)
+ * @return Pointer to a newly-allocated string containing a
+ *         substring of `s` or `NULL` if the string cannot be allocated
+ */
+char* av_strndup(const char* s, size_t len) av_malloc_attrib;
+
+/**
+ * Duplicate a buffer with av_malloc().
+ *
+ * @param p    Buffer to be duplicated
+ * @param size Size in bytes of the buffer copied
+ * @return Pointer to a newly allocated buffer containing a
+ *         copy of `p` or `NULL` if the buffer cannot be allocated
+ */
+void* av_memdup(const void* p, size_t size);
+
+/**
+ * Overlapping memcpy() implementation.
+ *
+ * @param dst  Destination buffer
+ * @param back Number of bytes back to start copying (i.e. the initial size of
+ *             the overlapping window); must be > 0
+ * @param cnt  Number of bytes to copy; must be >= 0
+ *
+ * @note `cnt > back` is valid, this will copy the bytes we just copied,
+ *       thus creating a repeating pattern with a period length of `back`.
+ */
+void av_memcpy_backptr(uint8_t* dst, int back, int cnt);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_mem_dynarray Dynamic Array
+ *
+ * Utilities to make an array grow when needed.
+ *
+ * Sometimes, the programmer would want to have an array that can grow when
+ * needed. The libavutil dynamic array utilities fill that need.
+ *
+ * libavutil supports two systems of appending elements onto a dynamically
+ * allocated array, the first one storing the pointer to the value in the
+ * array, and the second storing the value directly. In both systems, the
+ * caller is responsible for maintaining a variable containing the length of
+ * the array, as well as freeing of the array after use.
+ *
+ * The first system stores pointers to values in a block of dynamically
+ * allocated memory. Since only pointers are stored, the function does not need
+ * to know the size of the type. Both av_dynarray_add() and
+ * av_dynarray_add_nofree() implement this system.
+ *
+ * @code
+ * type **array = NULL; //< an array of pointers to values
+ * int    nb    = 0;    //< a variable to keep track of the length of the array
+ *
+ * type to_be_added  = ...;
+ * type to_be_added2 = ...;
+ *
+ * av_dynarray_add(&array, &nb, &to_be_added);
+ * if (nb == 0)
+ *     return AVERROR(ENOMEM);
+ *
+ * av_dynarray_add(&array, &nb, &to_be_added2);
+ * if (nb == 0)
+ *     return AVERROR(ENOMEM);
+ *
+ * // Now:
+ * //  nb           == 2
+ * // &to_be_added  == array[0]
+ * // &to_be_added2 == array[1]
+ *
+ * av_freep(&array);
+ * @endcode
+ *
+ * The second system stores the value directly in a block of memory. As a
+ * result, the function has to know the size of the type. av_dynarray2_add()
+ * implements this mechanism.
+ *
+ * @code
+ * type *array = NULL; //< an array of values
+ * int   nb    = 0;    //< a variable to keep track of the length of the array
+ *
+ * type to_be_added  = ...;
+ * type to_be_added2 = ...;
+ *
+ * type *addr = av_dynarray2_add((void **)&array, &nb, sizeof(*array), NULL);
+ * if (!addr)
+ *     return AVERROR(ENOMEM);
+ * memcpy(addr, &to_be_added, sizeof(to_be_added));
+ *
+ * // Shortcut of the above.
+ * type *addr = av_dynarray2_add((void **)&array, &nb, sizeof(*array),
+ *                               (const void *)&to_be_added2);
+ * if (!addr)
+ *     return AVERROR(ENOMEM);
+ *
+ * // Now:
+ * //  nb           == 2
+ * //  to_be_added  == array[0]
+ * //  to_be_added2 == array[1]
+ *
+ * av_freep(&array);
+ * @endcode
+ *
+ * @{
+ */
+
+/**
+ * Add the pointer to an element to a dynamic array.
+ *
+ * The array to grow is supposed to be an array of pointers to
+ * structures, and the element to add must be a pointer to an already
+ * allocated structure.
+ *
+ * The array is reallocated when its size reaches powers of 2.
+ * Therefore, the amortized cost of adding an element is constant.
+ *
+ * In case of success, the pointer to the array is updated in order to
+ * point to the new grown array, and the number pointed to by `nb_ptr`
+ * is incremented.
+ * In case of failure, the array is freed, `*tab_ptr` is set to `NULL` and
+ * `*nb_ptr` is set to 0.
+ *
+ * @param[in,out] tab_ptr Pointer to the array to grow
+ * @param[in,out] nb_ptr  Pointer to the number of elements in the array
+ * @param[in]     elem    Element to add
+ * @see av_dynarray_add_nofree(), av_dynarray2_add()
+ */
+void av_dynarray_add(void* tab_ptr, int* nb_ptr, void* elem);
+
+/**
+ * Add an element to a dynamic array.
+ *
+ * Function has the same functionality as av_dynarray_add(),
+ * but it doesn't free memory on fails. It returns error code
+ * instead and leave current buffer untouched.
+ *
+ * @return >=0 on success, negative otherwise
+ * @see av_dynarray_add(), av_dynarray2_add()
+ */
+av_warn_unused_result int av_dynarray_add_nofree(void* tab_ptr, int* nb_ptr,
+                                                 void* elem);
+
+/**
+ * Add an element of size `elem_size` to a dynamic array.
+ *
+ * The array is reallocated when its number of elements reaches powers of 2.
+ * Therefore, the amortized cost of adding an element is constant.
+ *
+ * In case of success, the pointer to the array is updated in order to
+ * point to the new grown array, and the number pointed to by `nb_ptr`
+ * is incremented.
+ * In case of failure, the array is freed, `*tab_ptr` is set to `NULL` and
+ * `*nb_ptr` is set to 0.
+ *
+ * @param[in,out] tab_ptr   Pointer to the array to grow
+ * @param[in,out] nb_ptr    Pointer to the number of elements in the array
+ * @param[in]     elem_size Size in bytes of an element in the array
+ * @param[in]     elem_data Pointer to the data of the element to add. If
+ *                          `NULL`, the space of the newly added element is
+ *                          allocated but left uninitialized.
+ *
+ * @return Pointer to the data of the element to copy in the newly allocated
+ *         space
+ * @see av_dynarray_add(), av_dynarray_add_nofree()
+ */
+void* av_dynarray2_add(void** tab_ptr, int* nb_ptr, size_t elem_size,
+                       const uint8_t* elem_data);
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_mem_misc Miscellaneous Functions
+ *
+ * Other functions related to memory allocation.
+ *
+ * @{
+ */
+
+/**
+ * Multiply two `size_t` values checking for overflow.
+ *
+ * @param[in]  a   Operand of multiplication
+ * @param[in]  b   Operand of multiplication
+ * @param[out] r   Pointer to the result of the operation
+ * @return 0 on success, AVERROR(EINVAL) on overflow
+ */
+int av_size_mult(size_t a, size_t b, size_t* r);
+
+/**
+ * Set the maximum size that may be allocated in one block.
+ *
+ * The value specified with this function is effective for all libavutil's @ref
+ * lavu_mem_funcs "heap management functions."
+ *
+ * By default, the max value is defined as `INT_MAX`.
+ *
+ * @param max Value to be set as the new maximum size
+ *
+ * @warning Exercise extreme caution when using this function. Don't touch
+ *          this if you do not understand the full consequence of doing so.
+ */
+void av_max_alloc(size_t max);
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_MEM_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/pixfmt.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/pixfmt.h
new file mode 100644
index 0000000000..5a33471a05
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/pixfmt.h
@@ -0,0 +1,920 @@
+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_PIXFMT_H
+#define AVUTIL_PIXFMT_H
+
+/**
+ * @file
+ * pixel format definitions
+ */
+
+#include "libavutil/avconfig.h"
+#include "version.h"
+
+#define AVPALETTE_SIZE 1024
+#define AVPALETTE_COUNT 256
+
+/**
+ * Maximum number of planes in any pixel format.
+ * This should be used when a maximum is needed, but code should not
+ * be written to require a maximum for no good reason.
+ */
+#define AV_VIDEO_MAX_PLANES 4
+
+/**
+ * Pixel format.
+ *
+ * @note
+ * AV_PIX_FMT_RGB32 is handled in an endian-specific manner. An RGBA
+ * color is put together as:
+ *  (A << 24) | (R << 16) | (G << 8) | B
+ * This is stored as BGRA on little-endian CPU architectures and ARGB on
+ * big-endian CPUs.
+ *
+ * @note
+ * If the resolution is not a multiple of the chroma subsampling factor
+ * then the chroma plane resolution must be rounded up.
+ *
+ * @par
+ * When the pixel format is palettized RGB32 (AV_PIX_FMT_PAL8), the palettized
+ * image data is stored in AVFrame.data[0]. The palette is transported in
+ * AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
+ * formatted the same as in AV_PIX_FMT_RGB32 described above (i.e., it is
+ * also endian-specific). Note also that the individual RGB32 palette
+ * components stored in AVFrame.data[1] should be in the range 0..255.
+ * This is important as many custom PAL8 video codecs that were designed
+ * to run on the IBM VGA graphics adapter use 6-bit palette components.
+ *
+ * @par
+ * For all the 8 bits per pixel formats, an RGB32 palette is in data[1] like
+ * for pal8. This palette is filled in automatically by the function
+ * allocating the picture.
+ */
+enum AVPixelFormat {
+  AV_PIX_FMT_NONE = -1,
+  AV_PIX_FMT_YUV420P,  ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y
+                       ///< samples)
+  AV_PIX_FMT_YUYV422,  ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
+  AV_PIX_FMT_RGB24,    ///< packed RGB 8:8:8, 24bpp, RGBRGB...
+  AV_PIX_FMT_BGR24,    ///< packed RGB 8:8:8, 24bpp, BGRBGR...
+  AV_PIX_FMT_YUV422P,  ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y
+                       ///< samples)
+  AV_PIX_FMT_YUV444P,  ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y
+                       ///< samples)
+  AV_PIX_FMT_YUV410P,  ///< planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y
+                       ///< samples)
+  AV_PIX_FMT_YUV411P,  ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y
+                       ///< samples)
+  AV_PIX_FMT_GRAY8,    ///<        Y        ,  8bpp
+  AV_PIX_FMT_MONOWHITE,  ///<        Y        ,  1bpp, 0 is white, 1 is black,
+                         ///<        in each byte pixels are ordered from the
+                         ///<        msb to the lsb
+  AV_PIX_FMT_MONOBLACK,  ///<        Y        ,  1bpp, 0 is black, 1 is white,
+                         ///<        in each byte pixels are ordered from the
+                         ///<        msb to the lsb
+  AV_PIX_FMT_PAL8,       ///< 8 bits with AV_PIX_FMT_RGB32 palette
+  AV_PIX_FMT_YUVJ420P,   ///< planar YUV 4:2:0, 12bpp, full scale (JPEG),
+                         ///< deprecated in favor of AV_PIX_FMT_YUV420P and
+                         ///< setting color_range
+  AV_PIX_FMT_YUVJ422P,   ///< planar YUV 4:2:2, 16bpp, full scale (JPEG),
+                         ///< deprecated in favor of AV_PIX_FMT_YUV422P and
+                         ///< setting color_range
+  AV_PIX_FMT_YUVJ444P,   ///< planar YUV 4:4:4, 24bpp, full scale (JPEG),
+                         ///< deprecated in favor of AV_PIX_FMT_YUV444P and
+                         ///< setting color_range
+  AV_PIX_FMT_UYVY422,    ///< packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
+  AV_PIX_FMT_UYYVYY411,  ///< packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
+  AV_PIX_FMT_BGR8,       ///< packed RGB 3:3:2,  8bpp, (msb)2B 3G 3R(lsb)
+  AV_PIX_FMT_BGR4,  ///< packed RGB 1:2:1 bitstream,  4bpp, (msb)1B 2G 1R(lsb),
+                    ///< a byte contains two pixels, the first pixel in the byte
+                    ///< is the one composed by the 4 msb bits
+  AV_PIX_FMT_BGR4_BYTE,  ///< packed RGB 1:2:1,  8bpp, (msb)1B 2G 1R(lsb)
+  AV_PIX_FMT_RGB8,       ///< packed RGB 3:3:2,  8bpp, (msb)3R 3G 2B(lsb)
+  AV_PIX_FMT_RGB4,  ///< packed RGB 1:2:1 bitstream,  4bpp, (msb)1R 2G 1B(lsb),
+                    ///< a byte contains two pixels, the first pixel in the byte
+                    ///< is the one composed by the 4 msb bits
+  AV_PIX_FMT_RGB4_BYTE,  ///< packed RGB 1:2:1,  8bpp, (msb)1R 2G 1B(lsb)
+  AV_PIX_FMT_NV12,  ///< planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for
+                    ///< the UV components, which are interleaved (first byte U
+                    ///< and the following byte V)
+  AV_PIX_FMT_NV21,  ///< as above, but U and V bytes are swapped
+
+  AV_PIX_FMT_ARGB,  ///< packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
+  AV_PIX_FMT_RGBA,  ///< packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
+  AV_PIX_FMT_ABGR,  ///< packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
+  AV_PIX_FMT_BGRA,  ///< packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
+
+  AV_PIX_FMT_GRAY16BE,  ///<        Y        , 16bpp, big-endian
+  AV_PIX_FMT_GRAY16LE,  ///<        Y        , 16bpp, little-endian
+  AV_PIX_FMT_YUV440P,   ///< planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y
+                        ///< samples)
+  AV_PIX_FMT_YUVJ440P,  ///< planar YUV 4:4:0 full scale (JPEG), deprecated in
+                        ///< favor of AV_PIX_FMT_YUV440P and setting color_range
+  AV_PIX_FMT_YUVA420P,  ///< planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2
+                        ///< Y & A samples)
+  AV_PIX_FMT_RGB48BE,   ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the
+                        ///< 2-byte value for each R/G/B component is stored as
+                        ///< big-endian
+  AV_PIX_FMT_RGB48LE,   ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the
+                        ///< 2-byte value for each R/G/B component is stored as
+                        ///< little-endian
+
+  AV_PIX_FMT_RGB565BE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb),
+                        ///< big-endian
+  AV_PIX_FMT_RGB565LE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb),
+                        ///< little-endian
+  AV_PIX_FMT_RGB555BE,  ///< packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb),
+                        ///< big-endian   , X=unused/undefined
+  AV_PIX_FMT_RGB555LE,  ///< packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb),
+                        ///< little-endian, X=unused/undefined
+
+  AV_PIX_FMT_BGR565BE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb),
+                        ///< big-endian
+  AV_PIX_FMT_BGR565LE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb),
+                        ///< little-endian
+  AV_PIX_FMT_BGR555BE,  ///< packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb),
+                        ///< big-endian   , X=unused/undefined
+  AV_PIX_FMT_BGR555LE,  ///< packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb),
+                        ///< little-endian, X=unused/undefined
+
+  /**
+   *  Hardware acceleration through VA-API, data[3] contains a
+   *  VASurfaceID.
+   */
+  AV_PIX_FMT_VAAPI,
+
+  AV_PIX_FMT_YUV420P16LE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), little-endian
+  AV_PIX_FMT_YUV420P16BE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), big-endian
+  AV_PIX_FMT_YUV422P16LE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), little-endian
+  AV_PIX_FMT_YUV422P16BE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), big-endian
+  AV_PIX_FMT_YUV444P16LE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), little-endian
+  AV_PIX_FMT_YUV444P16BE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), big-endian
+  AV_PIX_FMT_DXVA2_VLD,    ///< HW decoding through DXVA2, Picture.data[3]
+                           ///< contains a LPDIRECT3DSURFACE9 pointer
+
+  AV_PIX_FMT_RGB444LE,  ///< packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb),
+                        ///< little-endian, X=unused/undefined
+  AV_PIX_FMT_RGB444BE,  ///< packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb),
+                        ///< big-endian,    X=unused/undefined
+  AV_PIX_FMT_BGR444LE,  ///< packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb),
+                        ///< little-endian, X=unused/undefined
+  AV_PIX_FMT_BGR444BE,  ///< packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb),
+                        ///< big-endian,    X=unused/undefined
+  AV_PIX_FMT_YA8,       ///< 8 bits gray, 8 bits alpha
+
+  AV_PIX_FMT_Y400A = AV_PIX_FMT_YA8,   ///< alias for AV_PIX_FMT_YA8
+  AV_PIX_FMT_GRAY8A = AV_PIX_FMT_YA8,  ///< alias for AV_PIX_FMT_YA8
+
+  AV_PIX_FMT_BGR48BE,  ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the
+                       ///< 2-byte value for each R/G/B component is stored as
+                       ///< big-endian
+  AV_PIX_FMT_BGR48LE,  ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the
+                       ///< 2-byte value for each R/G/B component is stored as
+                       ///< little-endian
+
+  /**
+   * The following 12 formats have the disadvantage of needing 1 format for each
+   * bit depth. Notice that each 9/10 bits sample is stored in 16 bits with
+   * extra padding. If you want to support multiple bit depths, then using
+   * AV_PIX_FMT_YUV420P16* with the bpp stored separately is better.
+   */
+  AV_PIX_FMT_YUV420P9BE,   ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), big-endian
+  AV_PIX_FMT_YUV420P9LE,   ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), little-endian
+  AV_PIX_FMT_YUV420P10BE,  ///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), big-endian
+  AV_PIX_FMT_YUV420P10LE,  ///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), little-endian
+  AV_PIX_FMT_YUV422P10BE,  ///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), big-endian
+  AV_PIX_FMT_YUV422P10LE,  ///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), little-endian
+  AV_PIX_FMT_YUV444P9BE,   ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), big-endian
+  AV_PIX_FMT_YUV444P9LE,   ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), little-endian
+  AV_PIX_FMT_YUV444P10BE,  ///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), big-endian
+  AV_PIX_FMT_YUV444P10LE,  ///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), little-endian
+  AV_PIX_FMT_YUV422P9BE,   ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), big-endian
+  AV_PIX_FMT_YUV422P9LE,   ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), little-endian
+  AV_PIX_FMT_GBRP,         ///< planar GBR 4:4:4 24bpp
+  AV_PIX_FMT_GBR24P = AV_PIX_FMT_GBRP,  // alias for #AV_PIX_FMT_GBRP
+  AV_PIX_FMT_GBRP9BE,                   ///< planar GBR 4:4:4 27bpp, big-endian
+  AV_PIX_FMT_GBRP9LE,   ///< planar GBR 4:4:4 27bpp, little-endian
+  AV_PIX_FMT_GBRP10BE,  ///< planar GBR 4:4:4 30bpp, big-endian
+  AV_PIX_FMT_GBRP10LE,  ///< planar GBR 4:4:4 30bpp, little-endian
+  AV_PIX_FMT_GBRP16BE,  ///< planar GBR 4:4:4 48bpp, big-endian
+  AV_PIX_FMT_GBRP16LE,  ///< planar GBR 4:4:4 48bpp, little-endian
+  AV_PIX_FMT_YUVA422P,  ///< planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y
+                        ///< & A samples)
+  AV_PIX_FMT_YUVA444P,  ///< planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y
+                        ///< & A samples)
+  AV_PIX_FMT_YUVA420P9BE,   ///< planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples), big-endian
+  AV_PIX_FMT_YUVA420P9LE,   ///< planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples), little-endian
+  AV_PIX_FMT_YUVA422P9BE,   ///< planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples), big-endian
+  AV_PIX_FMT_YUVA422P9LE,   ///< planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples), little-endian
+  AV_PIX_FMT_YUVA444P9BE,   ///< planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples), big-endian
+  AV_PIX_FMT_YUVA444P9LE,   ///< planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples), little-endian
+  AV_PIX_FMT_YUVA420P10BE,  ///< planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA420P10LE,  ///< planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples, little-endian)
+  AV_PIX_FMT_YUVA422P10BE,  ///< planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA422P10LE,  ///< planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples, little-endian)
+  AV_PIX_FMT_YUVA444P10BE,  ///< planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA444P10LE,  ///< planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples, little-endian)
+  AV_PIX_FMT_YUVA420P16BE,  ///< planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA420P16LE,  ///< planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per
+                            ///< 2x2 Y & A samples, little-endian)
+  AV_PIX_FMT_YUVA422P16BE,  ///< planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA422P16LE,  ///< planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y & A samples, little-endian)
+  AV_PIX_FMT_YUVA444P16BE,  ///< planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples, big-endian)
+  AV_PIX_FMT_YUVA444P16LE,  ///< planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y & A samples, little-endian)
+
+  AV_PIX_FMT_VDPAU,  ///< HW acceleration through VDPAU, Picture.data[3]
+                     ///< contains a VdpVideoSurface
+
+  AV_PIX_FMT_XYZ12LE,  ///< packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb),
+                       ///< the 2-byte value for each X/Y/Z is stored as
+                       ///< little-endian, the 4 lower bits are set to 0
+  AV_PIX_FMT_XYZ12BE,  ///< packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb),
+                       ///< the 2-byte value for each X/Y/Z is stored as
+                       ///< big-endian, the 4 lower bits are set to 0
+  AV_PIX_FMT_NV16,  ///< interleaved chroma YUV 4:2:2, 16bpp, (1 Cr & Cb sample
+                    ///< per 2x1 Y samples)
+  AV_PIX_FMT_NV20LE,  ///< interleaved chroma YUV 4:2:2, 20bpp, (1 Cr & Cb
+                      ///< sample per 2x1 Y samples), little-endian
+  AV_PIX_FMT_NV20BE,  ///< interleaved chroma YUV 4:2:2, 20bpp, (1 Cr & Cb
+                      ///< sample per 2x1 Y samples), big-endian
+
+  AV_PIX_FMT_RGBA64BE,  ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A,
+                        ///< the 2-byte value for each R/G/B/A component is
+                        ///< stored as big-endian
+  AV_PIX_FMT_RGBA64LE,  ///< packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A,
+                        ///< the 2-byte value for each R/G/B/A component is
+                        ///< stored as little-endian
+  AV_PIX_FMT_BGRA64BE,  ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A,
+                        ///< the 2-byte value for each R/G/B/A component is
+                        ///< stored as big-endian
+  AV_PIX_FMT_BGRA64LE,  ///< packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A,
+                        ///< the 2-byte value for each R/G/B/A component is
+                        ///< stored as little-endian
+
+  AV_PIX_FMT_YVYU422,  ///< packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
+
+  AV_PIX_FMT_YA16BE,  ///< 16 bits gray, 16 bits alpha (big-endian)
+  AV_PIX_FMT_YA16LE,  ///< 16 bits gray, 16 bits alpha (little-endian)
+
+  AV_PIX_FMT_GBRAP,      ///< planar GBRA 4:4:4:4 32bpp
+  AV_PIX_FMT_GBRAP16BE,  ///< planar GBRA 4:4:4:4 64bpp, big-endian
+  AV_PIX_FMT_GBRAP16LE,  ///< planar GBRA 4:4:4:4 64bpp, little-endian
+  /**
+   * HW acceleration through QSV, data[3] contains a pointer to the
+   * mfxFrameSurface1 structure.
+   *
+   * Before FFmpeg 5.0:
+   * mfxFrameSurface1.Data.MemId contains a pointer when importing
+   * the following frames as QSV frames:
+   *
+   * VAAPI:
+   * mfxFrameSurface1.Data.MemId contains a pointer to VASurfaceID
+   *
+   * DXVA2:
+   * mfxFrameSurface1.Data.MemId contains a pointer to IDirect3DSurface9
+   *
+   * FFmpeg 5.0 and above:
+   * mfxFrameSurface1.Data.MemId contains a pointer to the mfxHDLPair
+   * structure when importing the following frames as QSV frames:
+   *
+   * VAAPI:
+   * mfxHDLPair.first contains a VASurfaceID pointer.
+   * mfxHDLPair.second is always MFX_INFINITE.
+   *
+   * DXVA2:
+   * mfxHDLPair.first contains IDirect3DSurface9 pointer.
+   * mfxHDLPair.second is always MFX_INFINITE.
+   *
+   * D3D11:
+   * mfxHDLPair.first contains a ID3D11Texture2D pointer.
+   * mfxHDLPair.second contains the texture array index of the frame if the
+   * ID3D11Texture2D is an array texture, or always MFX_INFINITE if it is a
+   * normal texture.
+   */
+  AV_PIX_FMT_QSV,
+  /**
+   * HW acceleration though MMAL, data[3] contains a pointer to the
+   * MMAL_BUFFER_HEADER_T structure.
+   */
+  AV_PIX_FMT_MMAL,
+
+  AV_PIX_FMT_D3D11VA_VLD,  ///< HW decoding through Direct3D11 via old API,
+                           ///< Picture.data[3] contains a
+                           ///< ID3D11VideoDecoderOutputView pointer
+
+  /**
+   * HW acceleration through CUDA. data[i] contain CUdeviceptr pointers
+   * exactly as for system memory frames.
+   */
+  AV_PIX_FMT_CUDA,
+
+  AV_PIX_FMT_0RGB,  ///< packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
+  AV_PIX_FMT_RGB0,  ///< packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
+  AV_PIX_FMT_0BGR,  ///< packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
+  AV_PIX_FMT_BGR0,  ///< packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
+
+  AV_PIX_FMT_YUV420P12BE,  ///< planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), big-endian
+  AV_PIX_FMT_YUV420P12LE,  ///< planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), little-endian
+  AV_PIX_FMT_YUV420P14BE,  ///< planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), big-endian
+  AV_PIX_FMT_YUV420P14LE,  ///< planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per
+                           ///< 2x2 Y samples), little-endian
+  AV_PIX_FMT_YUV422P12BE,  ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), big-endian
+  AV_PIX_FMT_YUV422P12LE,  ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), little-endian
+  AV_PIX_FMT_YUV422P14BE,  ///< planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), big-endian
+  AV_PIX_FMT_YUV422P14LE,  ///< planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per
+                           ///< 2x1 Y samples), little-endian
+  AV_PIX_FMT_YUV444P12BE,  ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), big-endian
+  AV_PIX_FMT_YUV444P12LE,  ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), little-endian
+  AV_PIX_FMT_YUV444P14BE,  ///< planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), big-endian
+  AV_PIX_FMT_YUV444P14LE,  ///< planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per
+                           ///< 1x1 Y samples), little-endian
+  AV_PIX_FMT_GBRP12BE,     ///< planar GBR 4:4:4 36bpp, big-endian
+  AV_PIX_FMT_GBRP12LE,     ///< planar GBR 4:4:4 36bpp, little-endian
+  AV_PIX_FMT_GBRP14BE,     ///< planar GBR 4:4:4 42bpp, big-endian
+  AV_PIX_FMT_GBRP14LE,     ///< planar GBR 4:4:4 42bpp, little-endian
+  AV_PIX_FMT_YUVJ411P,  ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1
+                        ///< Y samples) full scale (JPEG), deprecated in favor
+                        ///< of AV_PIX_FMT_YUV411P and setting color_range
+
+  AV_PIX_FMT_BAYER_BGGR8,     ///< bayer, BGBG..(odd line), GRGR..(even line),
+                              ///< 8-bit samples
+  AV_PIX_FMT_BAYER_RGGB8,     ///< bayer, RGRG..(odd line), GBGB..(even line),
+                              ///< 8-bit samples
+  AV_PIX_FMT_BAYER_GBRG8,     ///< bayer, GBGB..(odd line), RGRG..(even line),
+                              ///< 8-bit samples
+  AV_PIX_FMT_BAYER_GRBG8,     ///< bayer, GRGR..(odd line), BGBG..(even line),
+                              ///< 8-bit samples
+  AV_PIX_FMT_BAYER_BGGR16LE,  ///< bayer, BGBG..(odd line), GRGR..(even line),
+                              ///< 16-bit samples, little-endian
+  AV_PIX_FMT_BAYER_BGGR16BE,  ///< bayer, BGBG..(odd line), GRGR..(even line),
+                              ///< 16-bit samples, big-endian
+  AV_PIX_FMT_BAYER_RGGB16LE,  ///< bayer, RGRG..(odd line), GBGB..(even line),
+                              ///< 16-bit samples, little-endian
+  AV_PIX_FMT_BAYER_RGGB16BE,  ///< bayer, RGRG..(odd line), GBGB..(even line),
+                              ///< 16-bit samples, big-endian
+  AV_PIX_FMT_BAYER_GBRG16LE,  ///< bayer, GBGB..(odd line), RGRG..(even line),
+                              ///< 16-bit samples, little-endian
+  AV_PIX_FMT_BAYER_GBRG16BE,  ///< bayer, GBGB..(odd line), RGRG..(even line),
+                              ///< 16-bit samples, big-endian
+  AV_PIX_FMT_BAYER_GRBG16LE,  ///< bayer, GRGR..(odd line), BGBG..(even line),
+                              ///< 16-bit samples, little-endian
+  AV_PIX_FMT_BAYER_GRBG16BE,  ///< bayer, GRGR..(odd line), BGBG..(even line),
+                              ///< 16-bit samples, big-endian
+
+  AV_PIX_FMT_YUV440P10LE,  ///< planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per
+                           ///< 1x2 Y samples), little-endian
+  AV_PIX_FMT_YUV440P10BE,  ///< planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per
+                           ///< 1x2 Y samples), big-endian
+  AV_PIX_FMT_YUV440P12LE,  ///< planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per
+                           ///< 1x2 Y samples), little-endian
+  AV_PIX_FMT_YUV440P12BE,  ///< planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per
+                           ///< 1x2 Y samples), big-endian
+  AV_PIX_FMT_AYUV64LE,  ///< packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y
+                        ///< & A samples), little-endian
+  AV_PIX_FMT_AYUV64BE,  ///< packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y
+                        ///< & A samples), big-endian
+
+  AV_PIX_FMT_VIDEOTOOLBOX,  ///< hardware decoding through Videotoolbox
+
+  AV_PIX_FMT_P010LE,  ///< like NV12, with 10bpp per component, data in the high
+                      ///< bits, zeros in the low bits, little-endian
+  AV_PIX_FMT_P010BE,  ///< like NV12, with 10bpp per component, data in the high
+                      ///< bits, zeros in the low bits, big-endian
+
+  AV_PIX_FMT_GBRAP12BE,  ///< planar GBR 4:4:4:4 48bpp, big-endian
+  AV_PIX_FMT_GBRAP12LE,  ///< planar GBR 4:4:4:4 48bpp, little-endian
+
+  AV_PIX_FMT_GBRAP10BE,  ///< planar GBR 4:4:4:4 40bpp, big-endian
+  AV_PIX_FMT_GBRAP10LE,  ///< planar GBR 4:4:4:4 40bpp, little-endian
+
+  AV_PIX_FMT_MEDIACODEC,  ///< hardware decoding through MediaCodec
+
+  AV_PIX_FMT_GRAY12BE,  ///<        Y        , 12bpp, big-endian
+  AV_PIX_FMT_GRAY12LE,  ///<        Y        , 12bpp, little-endian
+  AV_PIX_FMT_GRAY10BE,  ///<        Y        , 10bpp, big-endian
+  AV_PIX_FMT_GRAY10LE,  ///<        Y        , 10bpp, little-endian
+
+  AV_PIX_FMT_P016LE,  ///< like NV12, with 16bpp per component, little-endian
+  AV_PIX_FMT_P016BE,  ///< like NV12, with 16bpp per component, big-endian
+
+  /**
+   * Hardware surfaces for Direct3D11.
+   *
+   * This is preferred over the legacy AV_PIX_FMT_D3D11VA_VLD. The new D3D11
+   * hwaccel API and filtering support AV_PIX_FMT_D3D11 only.
+   *
+   * data[0] contains a ID3D11Texture2D pointer, and data[1] contains the
+   * texture array index of the frame as intptr_t if the ID3D11Texture2D is
+   * an array texture (or always 0 if it's a normal texture).
+   */
+  AV_PIX_FMT_D3D11,
+
+  AV_PIX_FMT_GRAY9BE,  ///<        Y        , 9bpp, big-endian
+  AV_PIX_FMT_GRAY9LE,  ///<        Y        , 9bpp, little-endian
+
+  AV_PIX_FMT_GBRPF32BE,  ///< IEEE-754 single precision planar GBR 4:4:4, 96bpp,
+                         ///< big-endian
+  AV_PIX_FMT_GBRPF32LE,  ///< IEEE-754 single precision planar GBR 4:4:4, 96bpp,
+                         ///< little-endian
+  AV_PIX_FMT_GBRAPF32BE,  ///< IEEE-754 single precision planar GBRA 4:4:4:4,
+                          ///< 128bpp, big-endian
+  AV_PIX_FMT_GBRAPF32LE,  ///< IEEE-754 single precision planar GBRA 4:4:4:4,
+                          ///< 128bpp, little-endian
+
+  /**
+   * DRM-managed buffers exposed through PRIME buffer sharing.
+   *
+   * data[0] points to an AVDRMFrameDescriptor.
+   */
+  AV_PIX_FMT_DRM_PRIME,
+  /**
+   * Hardware surfaces for OpenCL.
+   *
+   * data[i] contain 2D image objects (typed in C as cl_mem, used
+   * in OpenCL as image2d_t) for each plane of the surface.
+   */
+  AV_PIX_FMT_OPENCL,
+
+  AV_PIX_FMT_GRAY14BE,  ///<        Y        , 14bpp, big-endian
+  AV_PIX_FMT_GRAY14LE,  ///<        Y        , 14bpp, little-endian
+
+  AV_PIX_FMT_GRAYF32BE,  ///< IEEE-754 single precision Y, 32bpp, big-endian
+  AV_PIX_FMT_GRAYF32LE,  ///< IEEE-754 single precision Y, 32bpp, little-endian
+
+  AV_PIX_FMT_YUVA422P12BE,  ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y samples), 12b alpha, big-endian
+  AV_PIX_FMT_YUVA422P12LE,  ///< planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per
+                            ///< 2x1 Y samples), 12b alpha, little-endian
+  AV_PIX_FMT_YUVA444P12BE,  ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y samples), 12b alpha, big-endian
+  AV_PIX_FMT_YUVA444P12LE,  ///< planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per
+                            ///< 1x1 Y samples), 12b alpha, little-endian
+
+  AV_PIX_FMT_NV24,  ///< planar YUV 4:4:4, 24bpp, 1 plane for Y and 1 plane for
+                    ///< the UV components, which are interleaved (first byte U
+                    ///< and the following byte V)
+  AV_PIX_FMT_NV42,  ///< as above, but U and V bytes are swapped
+
+  /**
+   * Vulkan hardware images.
+   *
+   * data[0] points to an AVVkFrame
+   */
+  AV_PIX_FMT_VULKAN,
+
+  AV_PIX_FMT_Y210BE,  ///< packed YUV 4:2:2 like YUYV422, 20bpp, data in the
+                      ///< high bits, big-endian
+  AV_PIX_FMT_Y210LE,  ///< packed YUV 4:2:2 like YUYV422, 20bpp, data in the
+                      ///< high bits, little-endian
+
+  AV_PIX_FMT_X2RGB10LE,  ///< packed RGB 10:10:10, 30bpp, (msb)2X 10R 10G
+                         ///< 10B(lsb), little-endian, X=unused/undefined
+  AV_PIX_FMT_X2RGB10BE,  ///< packed RGB 10:10:10, 30bpp, (msb)2X 10R 10G
+                         ///< 10B(lsb), big-endian, X=unused/undefined
+  AV_PIX_FMT_X2BGR10LE,  ///< packed BGR 10:10:10, 30bpp, (msb)2X 10B 10G
+                         ///< 10R(lsb), little-endian, X=unused/undefined
+  AV_PIX_FMT_X2BGR10BE,  ///< packed BGR 10:10:10, 30bpp, (msb)2X 10B 10G
+                         ///< 10R(lsb), big-endian, X=unused/undefined
+
+  AV_PIX_FMT_P210BE,  ///< interleaved chroma YUV 4:2:2, 20bpp, data in the high
+                      ///< bits, big-endian
+  AV_PIX_FMT_P210LE,  ///< interleaved chroma YUV 4:2:2, 20bpp, data in the high
+                      ///< bits, little-endian
+
+  AV_PIX_FMT_P410BE,  ///< interleaved chroma YUV 4:4:4, 30bpp, data in the high
+                      ///< bits, big-endian
+  AV_PIX_FMT_P410LE,  ///< interleaved chroma YUV 4:4:4, 30bpp, data in the high
+                      ///< bits, little-endian
+
+  AV_PIX_FMT_P216BE,  ///< interleaved chroma YUV 4:2:2, 32bpp, big-endian
+  AV_PIX_FMT_P216LE,  ///< interleaved chroma YUV 4:2:2, 32bpp, little-endian
+
+  AV_PIX_FMT_P416BE,  ///< interleaved chroma YUV 4:4:4, 48bpp, big-endian
+  AV_PIX_FMT_P416LE,  ///< interleaved chroma YUV 4:4:4, 48bpp, little-endian
+
+  AV_PIX_FMT_VUYA,  ///< packed VUYA 4:4:4, 32bpp, VUYAVUYA...
+
+  AV_PIX_FMT_RGBAF16BE,  ///< IEEE-754 half precision packed RGBA 16:16:16:16,
+                         ///< 64bpp, RGBARGBA..., big-endian
+  AV_PIX_FMT_RGBAF16LE,  ///< IEEE-754 half precision packed RGBA 16:16:16:16,
+                         ///< 64bpp, RGBARGBA..., little-endian
+
+  AV_PIX_FMT_VUYX,  ///< packed VUYX 4:4:4, 32bpp, Variant of VUYA where alpha
+                    ///< channel is left undefined
+
+  AV_PIX_FMT_P012LE,  ///< like NV12, with 12bpp per component, data in the high
+                      ///< bits, zeros in the low bits, little-endian
+  AV_PIX_FMT_P012BE,  ///< like NV12, with 12bpp per component, data in the high
+                      ///< bits, zeros in the low bits, big-endian
+
+  AV_PIX_FMT_Y212BE,  ///< packed YUV 4:2:2 like YUYV422, 24bpp, data in the
+                      ///< high bits, zeros in the low bits, big-endian
+  AV_PIX_FMT_Y212LE,  ///< packed YUV 4:2:2 like YUYV422, 24bpp, data in the
+                      ///< high bits, zeros in the low bits, little-endian
+
+  AV_PIX_FMT_XV30BE,  ///< packed XVYU 4:4:4, 32bpp, (msb)2X 10V 10Y 10U(lsb),
+                      ///< big-endian, variant of Y410 where alpha channel is
+                      ///< left undefined
+  AV_PIX_FMT_XV30LE,  ///< packed XVYU 4:4:4, 32bpp, (msb)2X 10V 10Y 10U(lsb),
+                      ///< little-endian, variant of Y410 where alpha channel is
+                      ///< left undefined
+
+  AV_PIX_FMT_XV36BE,  ///< packed XVYU 4:4:4, 48bpp, data in the high bits,
+                      ///< zeros in the low bits, big-endian, variant of Y412
+                      ///< where alpha channel is left undefined
+  AV_PIX_FMT_XV36LE,  ///< packed XVYU 4:4:4, 48bpp, data in the high bits,
+                      ///< zeros in the low bits, little-endian, variant of Y412
+                      ///< where alpha channel is left undefined
+
+  AV_PIX_FMT_RGBF32BE,  ///< IEEE-754 single precision packed RGB 32:32:32,
+                        ///< 96bpp, RGBRGB..., big-endian
+  AV_PIX_FMT_RGBF32LE,  ///< IEEE-754 single precision packed RGB 32:32:32,
+                        ///< 96bpp, RGBRGB..., little-endian
+
+  AV_PIX_FMT_RGBAF32BE,  ///< IEEE-754 single precision packed RGBA 32:32:32:32,
+                         ///< 128bpp, RGBARGBA..., big-endian
+  AV_PIX_FMT_RGBAF32LE,  ///< IEEE-754 single precision packed RGBA 32:32:32:32,
+                         ///< 128bpp, RGBARGBA..., little-endian
+
+  AV_PIX_FMT_P212BE,  ///< interleaved chroma YUV 4:2:2, 24bpp, data in the high
+                      ///< bits, big-endian
+  AV_PIX_FMT_P212LE,  ///< interleaved chroma YUV 4:2:2, 24bpp, data in the high
+                      ///< bits, little-endian
+
+  AV_PIX_FMT_P412BE,  ///< interleaved chroma YUV 4:4:4, 36bpp, data in the high
+                      ///< bits, big-endian
+  AV_PIX_FMT_P412LE,  ///< interleaved chroma YUV 4:4:4, 36bpp, data in the high
+                      ///< bits, little-endian
+
+  AV_PIX_FMT_GBRAP14BE,  ///< planar GBR 4:4:4:4 56bpp, big-endian
+  AV_PIX_FMT_GBRAP14LE,  ///< planar GBR 4:4:4:4 56bpp, little-endian
+
+  /**
+   * Hardware surfaces for Direct3D 12.
+   *
+   * data[0] points to an AVD3D12VAFrame
+   */
+  AV_PIX_FMT_D3D12,
+
+  AV_PIX_FMT_NB  ///< number of pixel formats, DO NOT USE THIS if you want to
+                 ///< link with shared libav* because the number of formats
+                 ///< might differ between versions
+};
+
+#if AV_HAVE_BIGENDIAN
+#  define AV_PIX_FMT_NE(be, le) AV_PIX_FMT_##be
+#else
+#  define AV_PIX_FMT_NE(be, le) AV_PIX_FMT_##le
+#endif
+
+#define AV_PIX_FMT_RGB32 AV_PIX_FMT_NE(ARGB, BGRA)
+#define AV_PIX_FMT_RGB32_1 AV_PIX_FMT_NE(RGBA, ABGR)
+#define AV_PIX_FMT_BGR32 AV_PIX_FMT_NE(ABGR, RGBA)
+#define AV_PIX_FMT_BGR32_1 AV_PIX_FMT_NE(BGRA, ARGB)
+#define AV_PIX_FMT_0RGB32 AV_PIX_FMT_NE(0RGB, BGR0)
+#define AV_PIX_FMT_0BGR32 AV_PIX_FMT_NE(0BGR, RGB0)
+
+#define AV_PIX_FMT_GRAY9 AV_PIX_FMT_NE(GRAY9BE, GRAY9LE)
+#define AV_PIX_FMT_GRAY10 AV_PIX_FMT_NE(GRAY10BE, GRAY10LE)
+#define AV_PIX_FMT_GRAY12 AV_PIX_FMT_NE(GRAY12BE, GRAY12LE)
+#define AV_PIX_FMT_GRAY14 AV_PIX_FMT_NE(GRAY14BE, GRAY14LE)
+#define AV_PIX_FMT_GRAY16 AV_PIX_FMT_NE(GRAY16BE, GRAY16LE)
+#define AV_PIX_FMT_YA16 AV_PIX_FMT_NE(YA16BE, YA16LE)
+#define AV_PIX_FMT_RGB48 AV_PIX_FMT_NE(RGB48BE, RGB48LE)
+#define AV_PIX_FMT_RGB565 AV_PIX_FMT_NE(RGB565BE, RGB565LE)
+#define AV_PIX_FMT_RGB555 AV_PIX_FMT_NE(RGB555BE, RGB555LE)
+#define AV_PIX_FMT_RGB444 AV_PIX_FMT_NE(RGB444BE, RGB444LE)
+#define AV_PIX_FMT_RGBA64 AV_PIX_FMT_NE(RGBA64BE, RGBA64LE)
+#define AV_PIX_FMT_BGR48 AV_PIX_FMT_NE(BGR48BE, BGR48LE)
+#define AV_PIX_FMT_BGR565 AV_PIX_FMT_NE(BGR565BE, BGR565LE)
+#define AV_PIX_FMT_BGR555 AV_PIX_FMT_NE(BGR555BE, BGR555LE)
+#define AV_PIX_FMT_BGR444 AV_PIX_FMT_NE(BGR444BE, BGR444LE)
+#define AV_PIX_FMT_BGRA64 AV_PIX_FMT_NE(BGRA64BE, BGRA64LE)
+
+#define AV_PIX_FMT_YUV420P9 AV_PIX_FMT_NE(YUV420P9BE, YUV420P9LE)
+#define AV_PIX_FMT_YUV422P9 AV_PIX_FMT_NE(YUV422P9BE, YUV422P9LE)
+#define AV_PIX_FMT_YUV444P9 AV_PIX_FMT_NE(YUV444P9BE, YUV444P9LE)
+#define AV_PIX_FMT_YUV420P10 AV_PIX_FMT_NE(YUV420P10BE, YUV420P10LE)
+#define AV_PIX_FMT_YUV422P10 AV_PIX_FMT_NE(YUV422P10BE, YUV422P10LE)
+#define AV_PIX_FMT_YUV440P10 AV_PIX_FMT_NE(YUV440P10BE, YUV440P10LE)
+#define AV_PIX_FMT_YUV444P10 AV_PIX_FMT_NE(YUV444P10BE, YUV444P10LE)
+#define AV_PIX_FMT_YUV420P12 AV_PIX_FMT_NE(YUV420P12BE, YUV420P12LE)
+#define AV_PIX_FMT_YUV422P12 AV_PIX_FMT_NE(YUV422P12BE, YUV422P12LE)
+#define AV_PIX_FMT_YUV440P12 AV_PIX_FMT_NE(YUV440P12BE, YUV440P12LE)
+#define AV_PIX_FMT_YUV444P12 AV_PIX_FMT_NE(YUV444P12BE, YUV444P12LE)
+#define AV_PIX_FMT_YUV420P14 AV_PIX_FMT_NE(YUV420P14BE, YUV420P14LE)
+#define AV_PIX_FMT_YUV422P14 AV_PIX_FMT_NE(YUV422P14BE, YUV422P14LE)
+#define AV_PIX_FMT_YUV444P14 AV_PIX_FMT_NE(YUV444P14BE, YUV444P14LE)
+#define AV_PIX_FMT_YUV420P16 AV_PIX_FMT_NE(YUV420P16BE, YUV420P16LE)
+#define AV_PIX_FMT_YUV422P16 AV_PIX_FMT_NE(YUV422P16BE, YUV422P16LE)
+#define AV_PIX_FMT_YUV444P16 AV_PIX_FMT_NE(YUV444P16BE, YUV444P16LE)
+
+#define AV_PIX_FMT_GBRP9 AV_PIX_FMT_NE(GBRP9BE, GBRP9LE)
+#define AV_PIX_FMT_GBRP10 AV_PIX_FMT_NE(GBRP10BE, GBRP10LE)
+#define AV_PIX_FMT_GBRP12 AV_PIX_FMT_NE(GBRP12BE, GBRP12LE)
+#define AV_PIX_FMT_GBRP14 AV_PIX_FMT_NE(GBRP14BE, GBRP14LE)
+#define AV_PIX_FMT_GBRP16 AV_PIX_FMT_NE(GBRP16BE, GBRP16LE)
+#define AV_PIX_FMT_GBRAP10 AV_PIX_FMT_NE(GBRAP10BE, GBRAP10LE)
+#define AV_PIX_FMT_GBRAP12 AV_PIX_FMT_NE(GBRAP12BE, GBRAP12LE)
+#define AV_PIX_FMT_GBRAP14 AV_PIX_FMT_NE(GBRAP14BE, GBRAP14LE)
+#define AV_PIX_FMT_GBRAP16 AV_PIX_FMT_NE(GBRAP16BE, GBRAP16LE)
+
+#define AV_PIX_FMT_BAYER_BGGR16 AV_PIX_FMT_NE(BAYER_BGGR16BE, BAYER_BGGR16LE)
+#define AV_PIX_FMT_BAYER_RGGB16 AV_PIX_FMT_NE(BAYER_RGGB16BE, BAYER_RGGB16LE)
+#define AV_PIX_FMT_BAYER_GBRG16 AV_PIX_FMT_NE(BAYER_GBRG16BE, BAYER_GBRG16LE)
+#define AV_PIX_FMT_BAYER_GRBG16 AV_PIX_FMT_NE(BAYER_GRBG16BE, BAYER_GRBG16LE)
+
+#define AV_PIX_FMT_GBRPF32 AV_PIX_FMT_NE(GBRPF32BE, GBRPF32LE)
+#define AV_PIX_FMT_GBRAPF32 AV_PIX_FMT_NE(GBRAPF32BE, GBRAPF32LE)
+
+#define AV_PIX_FMT_GRAYF32 AV_PIX_FMT_NE(GRAYF32BE, GRAYF32LE)
+
+#define AV_PIX_FMT_YUVA420P9 AV_PIX_FMT_NE(YUVA420P9BE, YUVA420P9LE)
+#define AV_PIX_FMT_YUVA422P9 AV_PIX_FMT_NE(YUVA422P9BE, YUVA422P9LE)
+#define AV_PIX_FMT_YUVA444P9 AV_PIX_FMT_NE(YUVA444P9BE, YUVA444P9LE)
+#define AV_PIX_FMT_YUVA420P10 AV_PIX_FMT_NE(YUVA420P10BE, YUVA420P10LE)
+#define AV_PIX_FMT_YUVA422P10 AV_PIX_FMT_NE(YUVA422P10BE, YUVA422P10LE)
+#define AV_PIX_FMT_YUVA444P10 AV_PIX_FMT_NE(YUVA444P10BE, YUVA444P10LE)
+#define AV_PIX_FMT_YUVA422P12 AV_PIX_FMT_NE(YUVA422P12BE, YUVA422P12LE)
+#define AV_PIX_FMT_YUVA444P12 AV_PIX_FMT_NE(YUVA444P12BE, YUVA444P12LE)
+#define AV_PIX_FMT_YUVA420P16 AV_PIX_FMT_NE(YUVA420P16BE, YUVA420P16LE)
+#define AV_PIX_FMT_YUVA422P16 AV_PIX_FMT_NE(YUVA422P16BE, YUVA422P16LE)
+#define AV_PIX_FMT_YUVA444P16 AV_PIX_FMT_NE(YUVA444P16BE, YUVA444P16LE)
+
+#define AV_PIX_FMT_XYZ12 AV_PIX_FMT_NE(XYZ12BE, XYZ12LE)
+#define AV_PIX_FMT_NV20 AV_PIX_FMT_NE(NV20BE, NV20LE)
+#define AV_PIX_FMT_AYUV64 AV_PIX_FMT_NE(AYUV64BE, AYUV64LE)
+#define AV_PIX_FMT_P010 AV_PIX_FMT_NE(P010BE, P010LE)
+#define AV_PIX_FMT_P012 AV_PIX_FMT_NE(P012BE, P012LE)
+#define AV_PIX_FMT_P016 AV_PIX_FMT_NE(P016BE, P016LE)
+
+#define AV_PIX_FMT_Y210 AV_PIX_FMT_NE(Y210BE, Y210LE)
+#define AV_PIX_FMT_Y212 AV_PIX_FMT_NE(Y212BE, Y212LE)
+#define AV_PIX_FMT_XV30 AV_PIX_FMT_NE(XV30BE, XV30LE)
+#define AV_PIX_FMT_XV36 AV_PIX_FMT_NE(XV36BE, XV36LE)
+#define AV_PIX_FMT_X2RGB10 AV_PIX_FMT_NE(X2RGB10BE, X2RGB10LE)
+#define AV_PIX_FMT_X2BGR10 AV_PIX_FMT_NE(X2BGR10BE, X2BGR10LE)
+
+#define AV_PIX_FMT_P210 AV_PIX_FMT_NE(P210BE, P210LE)
+#define AV_PIX_FMT_P410 AV_PIX_FMT_NE(P410BE, P410LE)
+#define AV_PIX_FMT_P212 AV_PIX_FMT_NE(P212BE, P212LE)
+#define AV_PIX_FMT_P412 AV_PIX_FMT_NE(P412BE, P412LE)
+#define AV_PIX_FMT_P216 AV_PIX_FMT_NE(P216BE, P216LE)
+#define AV_PIX_FMT_P416 AV_PIX_FMT_NE(P416BE, P416LE)
+
+#define AV_PIX_FMT_RGBAF16 AV_PIX_FMT_NE(RGBAF16BE, RGBAF16LE)
+
+#define AV_PIX_FMT_RGBF32 AV_PIX_FMT_NE(RGBF32BE, RGBF32LE)
+#define AV_PIX_FMT_RGBAF32 AV_PIX_FMT_NE(RGBAF32BE, RGBAF32LE)
+
+/**
+ * Chromaticity coordinates of the source primaries.
+ * These values match the ones defined by ISO/IEC 23091-2_2019 subclause 8.1 and
+ * ITU-T H.273.
+ */
+enum AVColorPrimaries {
+  AVCOL_PRI_RESERVED0 = 0,
+  AVCOL_PRI_BT709 =
+      1,  ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP 177 Annex B
+  AVCOL_PRI_UNSPECIFIED = 2,
+  AVCOL_PRI_RESERVED = 3,
+  AVCOL_PRI_BT470M =
+      4,  ///< also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
+
+  AVCOL_PRI_BT470BG = 5,  ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R
+                          ///< BT1700 625 PAL & SECAM
+  AVCOL_PRI_SMPTE170M =
+      6,  ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
+  AVCOL_PRI_SMPTE240M =
+      7,  ///< identical to above, also called "SMPTE C" even though it uses D65
+  AVCOL_PRI_FILM = 8,       ///< colour filters using Illuminant C
+  AVCOL_PRI_BT2020 = 9,     ///< ITU-R BT2020
+  AVCOL_PRI_SMPTE428 = 10,  ///< SMPTE ST 428-1 (CIE 1931 XYZ)
+  AVCOL_PRI_SMPTEST428_1 = AVCOL_PRI_SMPTE428,
+  AVCOL_PRI_SMPTE431 = 11,  ///< SMPTE ST 431-2 (2011) / DCI P3
+  AVCOL_PRI_SMPTE432 = 12,  ///< SMPTE ST 432-1 (2010) / P3 D65 / Display P3
+  AVCOL_PRI_EBU3213 = 22,   ///< EBU Tech. 3213-E (nothing there) / one of JEDEC
+                            ///< P22 group phosphors
+  AVCOL_PRI_JEDEC_P22 = AVCOL_PRI_EBU3213,
+  AVCOL_PRI_NB  ///< Not part of ABI
+};
+
+/**
+ * Color Transfer Characteristic.
+ * These values match the ones defined by ISO/IEC 23091-2_2019 subclause 8.2.
+ */
+enum AVColorTransferCharacteristic {
+  AVCOL_TRC_RESERVED0 = 0,
+  AVCOL_TRC_BT709 = 1,  ///< also ITU-R BT1361
+  AVCOL_TRC_UNSPECIFIED = 2,
+  AVCOL_TRC_RESERVED = 3,
+  AVCOL_TRC_GAMMA22 = 4,  ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
+  AVCOL_TRC_GAMMA28 = 5,  ///< also ITU-R BT470BG
+  AVCOL_TRC_SMPTE170M = 6,  ///< also ITU-R BT601-6 525 or 625 / ITU-R BT1358
+                            ///< 525 or 625 / ITU-R BT1700 NTSC
+  AVCOL_TRC_SMPTE240M = 7,
+  AVCOL_TRC_LINEAR = 8,  ///< "Linear transfer characteristics"
+  AVCOL_TRC_LOG = 9,  ///< "Logarithmic transfer characteristic (100:1 range)"
+  AVCOL_TRC_LOG_SQRT =
+      10,  ///< "Logarithmic transfer characteristic (100 * Sqrt(10) : 1 range)"
+  AVCOL_TRC_IEC61966_2_4 = 11,  ///< IEC 61966-2-4
+  AVCOL_TRC_BT1361_ECG = 12,    ///< ITU-R BT1361 Extended Colour Gamut
+  AVCOL_TRC_IEC61966_2_1 = 13,  ///< IEC 61966-2-1 (sRGB or sYCC)
+  AVCOL_TRC_BT2020_10 = 14,     ///< ITU-R BT2020 for 10-bit system
+  AVCOL_TRC_BT2020_12 = 15,     ///< ITU-R BT2020 for 12-bit system
+  AVCOL_TRC_SMPTE2084 =
+      16,  ///< SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems
+  AVCOL_TRC_SMPTEST2084 = AVCOL_TRC_SMPTE2084,
+  AVCOL_TRC_SMPTE428 = 17,  ///< SMPTE ST 428-1
+  AVCOL_TRC_SMPTEST428_1 = AVCOL_TRC_SMPTE428,
+  AVCOL_TRC_ARIB_STD_B67 = 18,  ///< ARIB STD-B67, known as "Hybrid log-gamma"
+  AVCOL_TRC_NB                  ///< Not part of ABI
+};
+
+/**
+ * YUV colorspace type.
+ * These values match the ones defined by ISO/IEC 23091-2_2019 subclause 8.3.
+ */
+enum AVColorSpace {
+  AVCOL_SPC_RGB = 0,    ///< order of coefficients is actually GBR, also IEC
+                        ///< 61966-2-1 (sRGB), YZX and ST 428-1
+  AVCOL_SPC_BT709 = 1,  ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 /
+                        ///< derived in SMPTE RP 177 Annex B
+  AVCOL_SPC_UNSPECIFIED = 2,
+  AVCOL_SPC_RESERVED =
+      3,  ///< reserved for future use by ITU-T and ISO/IEC just like 15-255 are
+  AVCOL_SPC_FCC =
+      4,  ///< FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
+  AVCOL_SPC_BT470BG = 5,  ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R
+                          ///< BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
+  AVCOL_SPC_SMPTE170M =
+      6,  ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC /
+          ///< functionally identical to above
+  AVCOL_SPC_SMPTE240M =
+      7,  ///< derived from 170M primaries and D65 white point, 170M is derived
+          ///< from BT470 System M's primaries
+  AVCOL_SPC_YCGCO =
+      8,  ///< used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
+  AVCOL_SPC_YCOCG = AVCOL_SPC_YCGCO,
+  AVCOL_SPC_BT2020_NCL = 9,  ///< ITU-R BT2020 non-constant luminance system
+  AVCOL_SPC_BT2020_CL = 10,  ///< ITU-R BT2020 constant luminance system
+  AVCOL_SPC_SMPTE2085 = 11,  ///< SMPTE 2085, Y'D'zD'x
+  AVCOL_SPC_CHROMA_DERIVED_NCL =
+      12,  ///< Chromaticity-derived non-constant luminance system
+  AVCOL_SPC_CHROMA_DERIVED_CL =
+      13,                   ///< Chromaticity-derived constant luminance system
+  AVCOL_SPC_ICTCP = 14,     ///< ITU-R BT.2100-0, ICtCp
+  AVCOL_SPC_IPT_C2 = 15,    ///< SMPTE ST 2128, IPT-C2
+  AVCOL_SPC_YCGCO_RE = 16,  ///< YCgCo-R, even addition of bits
+  AVCOL_SPC_YCGCO_RO = 17,  ///< YCgCo-R, odd addition of bits
+  AVCOL_SPC_NB              ///< Not part of ABI
+};
+
+/**
+ * Visual content value range.
+ *
+ * These values are based on definitions that can be found in multiple
+ * specifications, such as ITU-T BT.709 (3.4 - Quantization of RGB, luminance
+ * and colour-difference signals), ITU-T BT.2020 (Table 5 - Digital
+ * Representation) as well as ITU-T BT.2100 (Table 9 - Digital 10- and 12-bit
+ * integer representation). At the time of writing, the BT.2100 one is
+ * recommended, as it also defines the full range representation.
+ *
+ * Common definitions:
+ *   - For RGB and luma planes such as Y in YCbCr and I in ICtCp,
+ *     'E' is the original value in range of 0.0 to 1.0.
+ *   - For chroma planes such as Cb,Cr and Ct,Cp, 'E' is the original
+ *     value in range of -0.5 to 0.5.
+ *   - 'n' is the output bit depth.
+ *   - For additional definitions such as rounding and clipping to valid n
+ *     bit unsigned integer range, please refer to BT.2100 (Table 9).
+ */
+enum AVColorRange {
+  AVCOL_RANGE_UNSPECIFIED = 0,
+
+  /**
+   * Narrow or limited range content.
+   *
+   * - For luma planes:
+   *
+   *       (219 * E + 16) * 2^(n-8)
+   *
+   *   F.ex. the range of 16-235 for 8 bits
+   *
+   * - For chroma planes:
+   *
+   *       (224 * E + 128) * 2^(n-8)
+   *
+   *   F.ex. the range of 16-240 for 8 bits
+   */
+  AVCOL_RANGE_MPEG = 1,
+
+  /**
+   * Full range content.
+   *
+   * - For RGB and luma planes:
+   *
+   *       (2^n - 1) * E
+   *
+   *   F.ex. the range of 0-255 for 8 bits
+   *
+   * - For chroma planes:
+   *
+   *       (2^n - 1) * E + 2^(n - 1)
+   *
+   *   F.ex. the range of 1-255 for 8 bits
+   */
+  AVCOL_RANGE_JPEG = 2,
+  AVCOL_RANGE_NB  ///< Not part of ABI
+};
+
+/**
+ * Location of chroma samples.
+ *
+ * Illustration showing the location of the first (top left) chroma sample of
+ *the image, the left shows only luma, the right shows the location of the
+ *chroma sample, the 2 could be imagined to overlay each other but are drawn
+ *separately due to limitations of ASCII
+ *
+ *                1st 2nd       1st 2nd horizontal luma sample positions
+ *                 v   v         v   v
+ *                 ______        ______
+ *1st luma line > |X   X ...    |3 4 X ...     X are luma samples,
+ *                |             |1 2           1-6 are possible chroma positions
+ *2nd luma line > |X   X ...    |5 6 X ...     0 is undefined/unknown position
+ */
+enum AVChromaLocation {
+  AVCHROMA_LOC_UNSPECIFIED = 0,
+  AVCHROMA_LOC_LEFT = 1,    ///< MPEG-2/4 4:2:0, H.264 default for 4:2:0
+  AVCHROMA_LOC_CENTER = 2,  ///< MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0
+  AVCHROMA_LOC_TOPLEFT =
+      3,  ///< ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2
+  AVCHROMA_LOC_TOP = 4,
+  AVCHROMA_LOC_BOTTOMLEFT = 5,
+  AVCHROMA_LOC_BOTTOM = 6,
+  AVCHROMA_LOC_NB  ///< Not part of ABI
+};
+
+#endif /* AVUTIL_PIXFMT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/rational.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/rational.h
new file mode 100644
index 0000000000..13a3c41deb
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/rational.h
@@ -0,0 +1,226 @@
+/*
+ * rational numbers
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu_math_rational
+ * Utilties for rational number calculation.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#ifndef AVUTIL_RATIONAL_H
+#define AVUTIL_RATIONAL_H
+
+#include <stdint.h>
+#include <limits.h>
+#include "attributes.h"
+
+/**
+ * @defgroup lavu_math_rational AVRational
+ * @ingroup lavu_math
+ * Rational number calculation.
+ *
+ * While rational numbers can be expressed as floating-point numbers, the
+ * conversion process is a lossy one, so are floating-point operations. On the
+ * other hand, the nature of FFmpeg demands highly accurate calculation of
+ * timestamps. This set of rational number utilities serves as a generic
+ * interface for manipulating rational numbers as pairs of numerators and
+ * denominators.
+ *
+ * Many of the functions that operate on AVRational's have the suffix `_q`, in
+ * reference to the mathematical symbol "ℚ" (Q) which denotes the set of all
+ * rational numbers.
+ *
+ * @{
+ */
+
+/**
+ * Rational number (pair of numerator and denominator).
+ */
+typedef struct AVRational {
+  int num;  ///< Numerator
+  int den;  ///< Denominator
+} AVRational;
+
+/**
+ * Create an AVRational.
+ *
+ * Useful for compilers that do not support compound literals.
+ *
+ * @note The return value is not reduced.
+ * @see av_reduce()
+ */
+static inline AVRational av_make_q(int num, int den) {
+  AVRational r = {num, den};
+  return r;
+}
+
+/**
+ * Compare two rationals.
+ *
+ * @param a First rational
+ * @param b Second rational
+ *
+ * @return One of the following values:
+ *         - 0 if `a == b`
+ *         - 1 if `a > b`
+ *         - -1 if `a < b`
+ *         - `INT_MIN` if one of the values is of the form `0 / 0`
+ */
+static inline int av_cmp_q(AVRational a, AVRational b) {
+  const int64_t tmp = a.num * (int64_t)b.den - b.num * (int64_t)a.den;
+
+  if (tmp)
+    return (int)((tmp ^ a.den ^ b.den) >> 63) | 1;
+  else if (b.den && a.den)
+    return 0;
+  else if (a.num && b.num)
+    return (a.num >> 31) - (b.num >> 31);
+  else
+    return INT_MIN;
+}
+
+/**
+ * Convert an AVRational to a `double`.
+ * @param a AVRational to convert
+ * @return `a` in floating-point form
+ * @see av_d2q()
+ */
+static inline double av_q2d(AVRational a) { return a.num / (double)a.den; }
+
+/**
+ * Reduce a fraction.
+ *
+ * This is useful for framerate calculations.
+ *
+ * @param[out] dst_num Destination numerator
+ * @param[out] dst_den Destination denominator
+ * @param[in]      num Source numerator
+ * @param[in]      den Source denominator
+ * @param[in]      max Maximum allowed values for `dst_num` & `dst_den`
+ * @return 1 if the operation is exact, 0 otherwise
+ */
+int av_reduce(int* dst_num, int* dst_den, int64_t num, int64_t den,
+              int64_t max);
+
+/**
+ * Multiply two rationals.
+ * @param b First rational
+ * @param c Second rational
+ * @return b*c
+ */
+AVRational av_mul_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Divide one rational by another.
+ * @param b First rational
+ * @param c Second rational
+ * @return b/c
+ */
+AVRational av_div_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Add two rationals.
+ * @param b First rational
+ * @param c Second rational
+ * @return b+c
+ */
+AVRational av_add_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Subtract one rational from another.
+ * @param b First rational
+ * @param c Second rational
+ * @return b-c
+ */
+AVRational av_sub_q(AVRational b, AVRational c) av_const;
+
+/**
+ * Invert a rational.
+ * @param q value
+ * @return 1 / q
+ */
+static av_always_inline AVRational av_inv_q(AVRational q) {
+  AVRational r = {q.den, q.num};
+  return r;
+}
+
+/**
+ * Convert a double precision floating point number to a rational.
+ *
+ * In case of infinity, the returned value is expressed as `{1, 0}` or
+ * `{-1, 0}` depending on the sign.
+ *
+ * In general rational numbers with |num| <= 1<<26 && |den| <= 1<<26
+ * can be recovered exactly from their double representation.
+ * (no exceptions were found within 1B random ones)
+ *
+ * @param d   `double` to convert
+ * @param max Maximum allowed numerator and denominator
+ * @return `d` in AVRational form
+ * @see av_q2d()
+ */
+AVRational av_d2q(double d, int max) av_const;
+
+/**
+ * Find which of the two rationals is closer to another rational.
+ *
+ * @param q     Rational to be compared against
+ * @param q1    Rational to be tested
+ * @param q2    Rational to be tested
+ * @return One of the following values:
+ *         - 1 if `q1` is nearer to `q` than `q2`
+ *         - -1 if `q2` is nearer to `q` than `q1`
+ *         - 0 if they have the same distance
+ */
+int av_nearer_q(AVRational q, AVRational q1, AVRational q2);
+
+/**
+ * Find the value in a list of rationals nearest a given reference rational.
+ *
+ * @param q      Reference rational
+ * @param q_list Array of rationals terminated by `{0, 0}`
+ * @return Index of the nearest value found in the array
+ */
+int av_find_nearest_q_idx(AVRational q, const AVRational* q_list);
+
+/**
+ * Convert an AVRational to a IEEE 32-bit `float` expressed in fixed-point
+ * format.
+ *
+ * @param q Rational to be converted
+ * @return Equivalent floating-point value, expressed as an unsigned 32-bit
+ *         integer.
+ * @note The returned value is platform-indepedant.
+ */
+uint32_t av_q2intfloat(AVRational q);
+
+/**
+ * Return the best rational so that a and b are multiple of it.
+ * If the resulting denominator is larger than max_den, return def.
+ */
+AVRational av_gcd_q(AVRational a, AVRational b, int max_den, AVRational def);
+
+/**
+ * @}
+ */
+
+#endif /* AVUTIL_RATIONAL_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/samplefmt.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/samplefmt.h
new file mode 100644
index 0000000000..6ba22b0b79
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/samplefmt.h
@@ -0,0 +1,275 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_SAMPLEFMT_H
+#define AVUTIL_SAMPLEFMT_H
+
+#include <stdint.h>
+
+/**
+ * @addtogroup lavu_audio
+ * @{
+ *
+ * @defgroup lavu_sampfmts Audio sample formats
+ *
+ * Audio sample format enumeration and related convenience functions.
+ * @{
+ */
+
+/**
+ * Audio sample formats
+ *
+ * - The data described by the sample format is always in native-endian order.
+ *   Sample values can be expressed by native C types, hence the lack of a
+ * signed 24-bit sample format even though it is a common raw audio data format.
+ *
+ * - The floating-point formats are based on full volume being in the range
+ *   [-1.0, 1.0]. Any values outside this range are beyond full volume level.
+ *
+ * - The data layout as used in av_samples_fill_arrays() and elsewhere in FFmpeg
+ *   (such as AVFrame in libavcodec) is as follows:
+ *
+ * @par
+ * For planar sample formats, each audio channel is in a separate data plane,
+ * and linesize is the buffer size, in bytes, for a single plane. All data
+ * planes must be the same size. For packed sample formats, only the first data
+ * plane is used, and samples for each channel are interleaved. In this case,
+ * linesize is the buffer size, in bytes, for the 1 plane.
+ *
+ */
+enum AVSampleFormat {
+  AV_SAMPLE_FMT_NONE = -1,
+  AV_SAMPLE_FMT_U8,   ///< unsigned 8 bits
+  AV_SAMPLE_FMT_S16,  ///< signed 16 bits
+  AV_SAMPLE_FMT_S32,  ///< signed 32 bits
+  AV_SAMPLE_FMT_FLT,  ///< float
+  AV_SAMPLE_FMT_DBL,  ///< double
+
+  AV_SAMPLE_FMT_U8P,   ///< unsigned 8 bits, planar
+  AV_SAMPLE_FMT_S16P,  ///< signed 16 bits, planar
+  AV_SAMPLE_FMT_S32P,  ///< signed 32 bits, planar
+  AV_SAMPLE_FMT_FLTP,  ///< float, planar
+  AV_SAMPLE_FMT_DBLP,  ///< double, planar
+  AV_SAMPLE_FMT_S64,   ///< signed 64 bits
+  AV_SAMPLE_FMT_S64P,  ///< signed 64 bits, planar
+
+  AV_SAMPLE_FMT_NB  ///< Number of sample formats. DO NOT USE if linking
+                    ///< dynamically
+};
+
+/**
+ * Return the name of sample_fmt, or NULL if sample_fmt is not
+ * recognized.
+ */
+const char* av_get_sample_fmt_name(enum AVSampleFormat sample_fmt);
+
+/**
+ * Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE
+ * on error.
+ */
+enum AVSampleFormat av_get_sample_fmt(const char* name);
+
+/**
+ * Return the planar<->packed alternative form of the given sample format, or
+ * AV_SAMPLE_FMT_NONE on error. If the passed sample_fmt is already in the
+ * requested planar/packed format, the format returned is the same as the
+ * input.
+ */
+enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt,
+                                          int planar);
+
+/**
+ * Get the packed alternative form of the given sample format.
+ *
+ * If the passed sample_fmt is already in packed format, the format returned is
+ * the same as the input.
+ *
+ * @return  the packed alternative form of the given sample format or
+            AV_SAMPLE_FMT_NONE on error.
+ */
+enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt);
+
+/**
+ * Get the planar alternative form of the given sample format.
+ *
+ * If the passed sample_fmt is already in planar format, the format returned is
+ * the same as the input.
+ *
+ * @return  the planar alternative form of the given sample format or
+            AV_SAMPLE_FMT_NONE on error.
+ */
+enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt);
+
+/**
+ * Generate a string corresponding to the sample format with
+ * sample_fmt, or a header if sample_fmt is negative.
+ *
+ * @param buf the buffer where to write the string
+ * @param buf_size the size of buf
+ * @param sample_fmt the number of the sample format to print the
+ * corresponding info string, or a negative value to print the
+ * corresponding header.
+ * @return the pointer to the filled buffer or NULL if sample_fmt is
+ * unknown or in case of other errors
+ */
+char* av_get_sample_fmt_string(char* buf, int buf_size,
+                               enum AVSampleFormat sample_fmt);
+
+/**
+ * Return number of bytes per sample.
+ *
+ * @param sample_fmt the sample format
+ * @return number of bytes per sample or zero if unknown for the given
+ * sample format
+ */
+int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt);
+
+/**
+ * Check if the sample format is planar.
+ *
+ * @param sample_fmt the sample format to inspect
+ * @return 1 if the sample format is planar, 0 if it is interleaved
+ */
+int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt);
+
+/**
+ * Get the required buffer size for the given audio parameters.
+ *
+ * @param[out] linesize calculated linesize, may be NULL
+ * @param nb_channels   the number of channels
+ * @param nb_samples    the number of samples in a single channel
+ * @param sample_fmt    the sample format
+ * @param align         buffer size alignment (0 = default, 1 = no alignment)
+ * @return              required buffer size, or negative error code on failure
+ */
+int av_samples_get_buffer_size(int* linesize, int nb_channels, int nb_samples,
+                               enum AVSampleFormat sample_fmt, int align);
+
+/**
+ * @}
+ *
+ * @defgroup lavu_sampmanip Samples manipulation
+ *
+ * Functions that manipulate audio samples
+ * @{
+ */
+
+/**
+ * Fill plane data pointers and linesize for samples with sample
+ * format sample_fmt.
+ *
+ * The audio_data array is filled with the pointers to the samples data planes:
+ * for planar, set the start point of each channel's data within the buffer,
+ * for packed, set the start point of the entire buffer only.
+ *
+ * The value pointed to by linesize is set to the aligned size of each
+ * channel's data buffer for planar layout, or to the aligned size of the
+ * buffer for all channels for packed layout.
+ *
+ * The buffer in buf must be big enough to contain all the samples
+ * (use av_samples_get_buffer_size() to compute its minimum size),
+ * otherwise the audio_data pointers will point to invalid data.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param[out] audio_data  array to be filled with the pointer for each channel
+ * @param[out] linesize    calculated linesize, may be NULL
+ * @param buf              the pointer to a buffer containing the samples
+ * @param nb_channels      the number of channels
+ * @param nb_samples       the number of samples in a single channel
+ * @param sample_fmt       the sample format
+ * @param align            buffer size alignment (0 = default, 1 = no alignment)
+ * @return                 minimum size in bytes required for the buffer on
+ * success, or a negative error code on failure
+ */
+int av_samples_fill_arrays(uint8_t** audio_data, int* linesize,
+                           const uint8_t* buf, int nb_channels, int nb_samples,
+                           enum AVSampleFormat sample_fmt, int align);
+
+/**
+ * Allocate a samples buffer for nb_samples samples, and fill data pointers and
+ * linesize accordingly.
+ * The allocated samples buffer can be freed by using av_freep(&audio_data[0])
+ * Allocated data will be initialized to silence.
+ *
+ * @see enum AVSampleFormat
+ * The documentation for AVSampleFormat describes the data layout.
+ *
+ * @param[out] audio_data  array to be filled with the pointer for each channel
+ * @param[out] linesize    aligned size for audio buffer(s), may be NULL
+ * @param nb_channels      number of audio channels
+ * @param nb_samples       number of samples per channel
+ * @param sample_fmt       the sample format
+ * @param align            buffer size alignment (0 = default, 1 = no alignment)
+ * @return                 >=0 on success or a negative error code on failure
+ * @todo return the size of the allocated buffer in case of success at the next
+ * bump
+ * @see av_samples_fill_arrays()
+ * @see av_samples_alloc_array_and_samples()
+ */
+int av_samples_alloc(uint8_t** audio_data, int* linesize, int nb_channels,
+                     int nb_samples, enum AVSampleFormat sample_fmt, int align);
+
+/**
+ * Allocate a data pointers array, samples buffer for nb_samples
+ * samples, and fill data pointers and linesize accordingly.
+ *
+ * This is the same as av_samples_alloc(), but also allocates the data
+ * pointers array.
+ *
+ * @see av_samples_alloc()
+ */
+int av_samples_alloc_array_and_samples(uint8_t*** audio_data, int* linesize,
+                                       int nb_channels, int nb_samples,
+                                       enum AVSampleFormat sample_fmt,
+                                       int align);
+
+/**
+ * Copy samples from src to dst.
+ *
+ * @param dst destination array of pointers to data planes
+ * @param src source array of pointers to data planes
+ * @param dst_offset offset in samples at which the data will be written to dst
+ * @param src_offset offset in samples at which the data will be read from src
+ * @param nb_samples number of samples to be copied
+ * @param nb_channels number of audio channels
+ * @param sample_fmt audio sample format
+ */
+int av_samples_copy(uint8_t* const* dst, uint8_t* const* src, int dst_offset,
+                    int src_offset, int nb_samples, int nb_channels,
+                    enum AVSampleFormat sample_fmt);
+
+/**
+ * Fill an audio buffer with silence.
+ *
+ * @param audio_data  array of pointers to data planes
+ * @param offset      offset in samples at which to start filling
+ * @param nb_samples  number of samples to fill
+ * @param nb_channels number of audio channels
+ * @param sample_fmt  audio sample format
+ */
+int av_samples_set_silence(uint8_t* const* audio_data, int offset,
+                           int nb_samples, int nb_channels,
+                           enum AVSampleFormat sample_fmt);
+
+/**
+ * @}
+ * @}
+ */
+#endif /* AVUTIL_SAMPLEFMT_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/version.h b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/version.h
new file mode 100644
index 0000000000..8826d0da6c
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/include/libavutil/version.h
@@ -0,0 +1,121 @@
+/*
+ * copyright (c) 2003 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * @ingroup lavu
+ * Libavutil version macros
+ */
+
+#ifndef AVUTIL_VERSION_H
+#define AVUTIL_VERSION_H
+
+#include "macros.h"
+
+/**
+ * @addtogroup version_utils
+ *
+ * Useful to check and match library version in order to maintain
+ * backward compatibility.
+ *
+ * The FFmpeg libraries follow a versioning sheme very similar to
+ * Semantic Versioning (http://semver.org/)
+ * The difference is that the component called PATCH is called MICRO in FFmpeg
+ * and its value is reset to 100 instead of 0 to keep it above or equal to 100.
+ * Also we do not increase MICRO for every bugfix or change in git master.
+ *
+ * Prior to FFmpeg 3.2 point releases did not change any lib version number to
+ * avoid aliassing different git master checkouts.
+ * Starting with FFmpeg 3.2, the released library versions will occupy
+ * a separate MAJOR.MINOR that is not used on the master development branch.
+ * That is if we branch a release of master 55.10.123 we will bump to 55.11.100
+ * for the release and master will continue at 55.12.100 after it. Each new
+ * point release will then bump the MICRO improving the usefulness of the lib
+ * versions.
+ *
+ * @{
+ */
+
+#define AV_VERSION_INT(a, b, c) ((a) << 16 | (b) << 8 | (c))
+#define AV_VERSION_DOT(a, b, c) a##.##b##.##c
+#define AV_VERSION(a, b, c) AV_VERSION_DOT(a, b, c)
+
+/**
+ * Extract version components from the full ::AV_VERSION_INT int as returned
+ * by functions like ::avformat_version() and ::avcodec_version()
+ */
+#define AV_VERSION_MAJOR(a) ((a) >> 16)
+#define AV_VERSION_MINOR(a) (((a) & 0x00FF00) >> 8)
+#define AV_VERSION_MICRO(a) ((a) & 0xFF)
+
+/**
+ * @}
+ */
+
+/**
+ * @defgroup lavu_ver Version and Build diagnostics
+ *
+ * Macros and function useful to check at compiletime and at runtime
+ * which version of libavutil is in use.
+ *
+ * @{
+ */
+
+#define LIBAVUTIL_VERSION_MAJOR 59
+#define LIBAVUTIL_VERSION_MINOR 13
+#define LIBAVUTIL_VERSION_MICRO 100
+
+#define LIBAVUTIL_VERSION_INT                                      \
+  AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, LIBAVUTIL_VERSION_MINOR, \
+                 LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_VERSION                                      \
+  AV_VERSION(LIBAVUTIL_VERSION_MAJOR, LIBAVUTIL_VERSION_MINOR, \
+             LIBAVUTIL_VERSION_MICRO)
+#define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT
+
+#define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
+
+/**
+ * @defgroup lavu_depr_guards Deprecation Guards
+ * FF_API_* defines may be placed below to indicate public API that will be
+ * dropped at a future version bump. The defines themselves are not part of
+ * the public API and may change, break or disappear at any time.
+ *
+ * @note, when bumping the major version it is recommended to manually
+ * disable each FF_API_* in its own commit instead of disabling them all
+ * at once through the bump. This improves the git bisect-ability of the change.
+ *
+ * @{
+ */
+
+#define FF_API_HDR_VIVID_THREE_SPLINE (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_FRAME_PKT (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_INTERLACED_FRAME (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_FRAME_KEY (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_PALETTE_HAS_CHANGED (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_VULKAN_CONTIGUOUS_MEMORY (LIBAVUTIL_VERSION_MAJOR < 60)
+#define FF_API_H274_FILM_GRAIN_VCS (LIBAVUTIL_VERSION_MAJOR < 60)
+
+/**
+ * @}
+ * @}
+ */
+
+#endif /* AVUTIL_VERSION_H */
diff --git a/dom/media/platforms/ffmpeg/ffmpeg61/moz.build b/dom/media/platforms/ffmpeg/ffmpeg61/moz.build
new file mode 100644
index 0000000000..d598ae0017
--- /dev/null
+++ b/dom/media/platforms/ffmpeg/ffmpeg61/moz.build
@@ -0,0 +1,47 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+UNIFIED_SOURCES += [
+    "../FFmpegAudioDecoder.cpp",
+    "../FFmpegAudioEncoder.cpp",
+    "../FFmpegDataDecoder.cpp",
+    "../FFmpegDataEncoder.cpp",
+    "../FFmpegDecoderModule.cpp",
+    "../FFmpegEncoderModule.cpp",
+    "../FFmpegVideoDecoder.cpp",
+    "../FFmpegVideoEncoder.cpp",
+]
+LOCAL_INCLUDES += [
+    "..",
+    "/media/mozva",
+    "include",
+]
+
+if CONFIG["CC_TYPE"] in ("clang", "gcc"):
+    CXXFLAGS += ["-Wno-deprecated-declarations"]
+if CONFIG["CC_TYPE"] == "clang":
+    CXXFLAGS += [
+        "-Wno-unknown-attributes",
+    ]
+if CONFIG["CC_TYPE"] == "gcc":
+    CXXFLAGS += [
+        "-Wno-attributes",
+    ]
+if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk":
+    CXXFLAGS += CONFIG["MOZ_GTK3_CFLAGS"]
+if CONFIG["MOZ_ENABLE_VAAPI"] or CONFIG["MOZ_ENABLE_V4L2"]:
+    UNIFIED_SOURCES += ["../FFmpegVideoFramePool.cpp"]
+    LOCAL_INCLUDES += ["/third_party/drm/drm/include/libdrm/"]
+    USE_LIBS += ["mozva"]
+    DEFINES["MOZ_USE_HWDECODE"] = 1
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+LOCAL_INCLUDES += [
+    "/media/libyuv/libyuv/include",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/dom/media/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp b/dom/media/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp
index dfc8244f1d..c0a6e01f98 100644
--- a/dom/media/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp
+++ b/dom/media/platforms/ffmpeg/ffvpx/FFVPXRuntimeLinker.cpp
@@ -7,14 +7,10 @@
 #include "FFVPXRuntimeLinker.h"
 #include "FFmpegLibWrapper.h"
 #include "FFmpegLog.h"
-#include "BinaryPath.h"
 #include "mozilla/FileUtils.h"
 #include "nsLocalFile.h"
-#include "prmem.h"
+#include "nsXPCOMPrivate.h"
 #include "prlink.h"
-#ifdef XP_WIN
-#  include <windows.h>
-#endif
 
 namespace mozilla {
 
@@ -84,29 +80,37 @@ bool FFVPXRuntimeLinker::Init() {
   sFFVPXLib.LinkVAAPILibs();
 #endif
 
-  nsCOMPtr<nsIFile> libFile;
-  if (NS_FAILED(mozilla::BinaryPath::GetFile(getter_AddRefs(libFile)))) {
+#ifdef XP_WIN
+  PathString path =
+      GetLibraryFilePathname(LXUL_DLL, (PRFuncPtr)&FFVPXRuntimeLinker::Init);
+#else
+  PathString path =
+      GetLibraryFilePathname(XUL_DLL, (PRFuncPtr)&FFVPXRuntimeLinker::Init);
+#endif
+  if (path.IsEmpty()) {
+    return false;
+  }
+  nsCOMPtr<nsIFile> libFile = new nsLocalFile(path);
+  if (libFile->NativePath().IsEmpty()) {
     return false;
   }
 
-#ifdef XP_DARWIN
-  if (!XRE_IsParentProcess() &&
-      (XRE_GetChildProcBinPathType(XRE_GetProcessType()) ==
-       BinPathType::PluginContainer)) {
-    // On macOS, PluginContainer processes have their binary in a
-    // plugin-container.app/Content/MacOS/ directory.
-    nsCOMPtr<nsIFile> parentDir1, parentDir2;
-    if (NS_FAILED(libFile->GetParent(getter_AddRefs(parentDir1)))) {
-      return false;
-    }
-    if (NS_FAILED(parentDir1->GetParent(getter_AddRefs(parentDir2)))) {
-      return false;
-    }
-    if (NS_FAILED(parentDir2->GetParent(getter_AddRefs(libFile)))) {
+  if (getenv("MOZ_RUN_GTEST")
+#ifdef FUZZING
+      || getenv("FUZZER")
+#endif
+  ) {
+    // The condition above is the same as in
+    // xpcom/glue/standalone/nsXPCOMGlue.cpp. This means we can't reach here
+    // without the gtest libxul being loaded. In turn, that means the path to
+    // libxul leads to a subdirectory of where the libmozav* libraries are, so
+    // we get the parent.
+    nsCOMPtr<nsIFile> parent;
+    if (NS_FAILED(libFile->GetParent(getter_AddRefs(parent)))) {
       return false;
     }
+    libFile = parent;
   }
-#endif
 
   if (NS_FAILED(libFile->SetNativeLeafName(MOZ_DLL_PREFIX
                                            "mozavutil" MOZ_DLL_SUFFIX ""_ns))) {
diff --git a/dom/media/platforms/ffmpeg/ffvpx/moz.build b/dom/media/platforms/ffmpeg/ffvpx/moz.build
index bc72b6d1a7..a9236b25eb 100644
--- a/dom/media/platforms/ffmpeg/ffvpx/moz.build
+++ b/dom/media/platforms/ffmpeg/ffvpx/moz.build
@@ -25,7 +25,7 @@ SOURCES += [
 ]
 LOCAL_INCLUDES += [
     "..",
-    "../ffmpeg60/include",
+    "../ffmpeg61/include",
     "/media/mozva",
 ]
 
diff --git a/dom/media/platforms/ffmpeg/moz.build b/dom/media/platforms/ffmpeg/moz.build
index ac78eee289..ce7c06b9a6 100644
--- a/dom/media/platforms/ffmpeg/moz.build
+++ b/dom/media/platforms/ffmpeg/moz.build
@@ -16,6 +16,7 @@ DIRS += [
     "ffmpeg58",
     "ffmpeg59",
     "ffmpeg60",
+    "ffmpeg61",
 ]
 
 UNIFIED_SOURCES += ["FFmpegRuntimeLinker.cpp"]
diff --git a/dom/media/platforms/omx/OmxDataDecoder.cpp b/dom/media/platforms/omx/OmxDataDecoder.cpp
index e830f77dd2..6c40ca4910 100644
--- a/dom/media/platforms/omx/OmxDataDecoder.cpp
+++ b/dom/media/platforms/omx/OmxDataDecoder.cpp
@@ -521,14 +521,14 @@ nsTArray<RefPtr<OmxPromiseLayer::BufferData>>* OmxDataDecoder::GetBuffers(
   return &mOutPortBuffers;
 }
 
-void OmxDataDecoder::ResolveInitPromise(const char* aMethodName) {
+void OmxDataDecoder::ResolveInitPromise(StaticString aMethodName) {
   MOZ_ASSERT(mOmxTaskQueue->IsCurrentThreadIn());
-  LOG("called from %s", aMethodName);
+  LOG("called from %s", aMethodName.get());
   mInitPromise.ResolveIfExists(mTrackInfo->GetType(), aMethodName);
 }
 
 void OmxDataDecoder::RejectInitPromise(MediaResult aError,
-                                       const char* aMethodName) {
+                                       StaticString aMethodName) {
   MOZ_ASSERT(mOmxTaskQueue->IsCurrentThreadIn());
   mInitPromise.RejectIfExists(aError, aMethodName);
 }
diff --git a/dom/media/platforms/omx/OmxDataDecoder.h b/dom/media/platforms/omx/OmxDataDecoder.h
index 69c388ecee..a40aafea36 100644
--- a/dom/media/platforms/omx/OmxDataDecoder.h
+++ b/dom/media/platforms/omx/OmxDataDecoder.h
@@ -88,9 +88,9 @@ class OmxDataDecoder final : public MediaDataDecoder,
  protected:
   void InitializationTask();
 
-  void ResolveInitPromise(const char* aMethodName);
+  void ResolveInitPromise(StaticString aMethodName);
 
-  void RejectInitPromise(MediaResult aError, const char* aMethodName);
+  void RejectInitPromise(MediaResult aError, StaticString aMethodName);
 
   void OmxStateRunner();
 
diff --git a/dom/media/platforms/wmf/MFTEncoder.cpp b/dom/media/platforms/wmf/MFTEncoder.cpp
index 410da2733c..424ba7055b 100644
--- a/dom/media/platforms/wmf/MFTEncoder.cpp
+++ b/dom/media/platforms/wmf/MFTEncoder.cpp
@@ -10,6 +10,7 @@
 #include "mozilla/StaticPrefs_media.h"
 #include "mozilla/mscom/Utils.h"
 #include "WMFUtils.h"
+#include <comdef.h>
 
 // Missing from MinGW.
 #ifndef CODECAPI_AVEncAdaptiveMode
@@ -231,6 +232,7 @@ HRESULT MFTEncoder::Create(const GUID& aSubtype) {
 
   RefPtr<IMFActivate> factory = CreateFactory(aSubtype);
   if (!factory) {
+    MFT_ENC_LOGE("CreateFactory error");
     return E_FAIL;
   }
 
@@ -238,12 +240,18 @@ HRESULT MFTEncoder::Create(const GUID& aSubtype) {
   RefPtr<IMFTransform> encoder;
   HRESULT hr = factory->ActivateObject(
       IID_PPV_ARGS(static_cast<IMFTransform**>(getter_AddRefs(encoder))));
-  NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    MFT_ENC_LOGE("MFTEncoder::Create: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return hr;
+  }
 
   RefPtr<ICodecAPI> config;
   // Avoid IID_PPV_ARGS() here for MingGW fails to declare UUID for ICodecAPI.
   hr = encoder->QueryInterface(IID_ICodecAPI, getter_AddRefs(config));
   if (FAILED(hr)) {
+    MFT_ENC_LOGE("QueryInterface IID_ICodecAPI error");
     encoder = nullptr;
     factory->ShutdownObject();
     return hr;
@@ -276,7 +284,12 @@ MFTEncoder::SetMediaTypes(IMFMediaType* aInputType, IMFMediaType* aOutputType) {
   MOZ_ASSERT(aInputType && aOutputType);
 
   AsyncMFTResult asyncMFT = AttemptEnableAsync();
-  NS_ENSURE_TRUE(asyncMFT.isOk(), asyncMFT.unwrapErr());
+  if (asyncMFT.isErr()) {
+    HRESULT hr = asyncMFT.inspectErr();
+    _com_error error(hr);
+    MFT_ENC_LOGE("AttemptEnableAsync error: %ls", error.ErrorMessage());
+    return asyncMFT.inspectErr();
+  }
 
   HRESULT hr = GetStreamIDs();
   NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
@@ -325,6 +338,7 @@ MFTEncoder::AsyncMFTResult MFTEncoder::AttemptEnableAsync() {
   IMFAttributes* pAttributes = nullptr;
   HRESULT hr = mEncoder->GetAttributes(&pAttributes);
   if (FAILED(hr)) {
+    MFT_ENC_LOGE("Encoder->GetAttribute error");
     return AsyncMFTResult(hr);
   }
 
@@ -337,6 +351,10 @@ MFTEncoder::AsyncMFTResult MFTEncoder::AttemptEnableAsync() {
   }
   pAttributes->Release();
 
+  if (FAILED(hr)) {
+    MFT_ENC_LOGE("Setting async unlock");
+  }
+
   return SUCCEEDED(hr) ? AsyncMFTResult(async) : AsyncMFTResult(hr);
 }
 
diff --git a/dom/media/platforms/wmf/WMF.h b/dom/media/platforms/wmf/WMF.h
index 740442ceda..86afcb8e5c 100644
--- a/dom/media/platforms/wmf/WMF.h
+++ b/dom/media/platforms/wmf/WMF.h
@@ -23,6 +23,7 @@
 #include <codecapi.h>
 
 #include "mozilla/Atomics.h"
+#include "mozilla/AppShutdown.h"
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/StaticMutex.h"
 #include "nsThreadUtils.h"
@@ -74,7 +75,8 @@ class MediaFoundationInitializer final {
     if (sIsShutdown) {
       return false;
     }
-    return Get()->mHasInitialized;
+    auto* rv = Get();
+    return rv ? rv->mHasInitialized : false;
   }
 
  private:
@@ -82,17 +84,36 @@ class MediaFoundationInitializer final {
     {
       StaticMutexAutoLock lock(sCreateMutex);
       if (!sInitializer) {
+        // Already in shutdown.
+        if (AppShutdown::GetCurrentShutdownPhase() !=
+            ShutdownPhase::NotInShutdown) {
+          sIsShutdown = true;
+          return nullptr;
+        }
         sInitializer.reset(new MediaFoundationInitializer());
-        GetMainThreadSerialEventTarget()->Dispatch(
-            NS_NewRunnableFunction("MediaFoundationInitializer::Get", [&] {
-              // Need to run this before MTA thread gets destroyed.
-              RunOnShutdown(
-                  [&] {
-                    sInitializer.reset();
-                    sIsShutdown = true;
-                  },
-                  ShutdownPhase::XPCOMShutdown);
-            }));
+        auto shutdownCleanUp = [&] {
+          if (AppShutdown::GetCurrentShutdownPhase() !=
+              ShutdownPhase::NotInShutdown) {
+            sInitializer.reset();
+            sIsShutdown = true;
+            return;
+          }
+          // As MFShutdown needs to run on the MTA thread that is destroyed
+          // on XPCOMShutdownThreads, so we need to run cleanup before that
+          // phase.
+          RunOnShutdown(
+              [&]() {
+                sInitializer.reset();
+                sIsShutdown = true;
+              },
+              ShutdownPhase::XPCOMShutdown);
+        };
+        if (NS_IsMainThread()) {
+          shutdownCleanUp();
+        } else {
+          GetMainThreadSerialEventTarget()->Dispatch(NS_NewRunnableFunction(
+              "MediaFoundationInitializer::Get", shutdownCleanUp));
+        }
       }
     }
     return sInitializer.get();
diff --git a/dom/media/platforms/wmf/WMFDataEncoderUtils.cpp b/dom/media/platforms/wmf/WMFDataEncoderUtils.cpp
new file mode 100644
index 0000000000..3bab3ccb46
--- /dev/null
+++ b/dom/media/platforms/wmf/WMFDataEncoderUtils.cpp
@@ -0,0 +1,221 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WMFDataEncoderUtils.h"
+
+#include "EncoderConfig.h"
+#include "MFTEncoder.h"
+#include "MediaData.h"
+#include "mozilla/Logging.h"
+
+namespace mozilla {
+
+#define WMF_ENC_LOG(arg, ...)                         \
+  MOZ_LOG(mozilla::sPEMLog, mozilla::LogLevel::Error, \
+          ("WMFDataEncoderUtils::%s: " arg, __func__, ##__VA_ARGS__))
+
+GUID CodecToSubtype(CodecType aCodec) {
+  switch (aCodec) {
+    case CodecType::H264:
+      return MFVideoFormat_H264;
+    case CodecType::VP8:
+      return MFVideoFormat_VP80;
+    case CodecType::VP9:
+      return MFVideoFormat_VP90;
+    default:
+      return GUID_NULL;
+  }
+}
+
+bool CanCreateWMFEncoder(CodecType aCodec) {
+  bool canCreate = false;
+  mscom::EnsureMTA([&]() {
+    if (!wmf::MediaFoundationInitializer::HasInitialized()) {
+      return;
+    }
+    // Try HW encoder first.
+    auto enc = MakeRefPtr<MFTEncoder>(false /* HW not allowed */);
+    canCreate = SUCCEEDED(enc->Create(CodecToSubtype(aCodec)));
+    if (!canCreate) {
+      // Try SW encoder.
+      enc = MakeRefPtr<MFTEncoder>(true /* HW not allowed */);
+      canCreate = SUCCEEDED(enc->Create(CodecToSubtype(aCodec)));
+    }
+  });
+  return canCreate;
+}
+
+static already_AddRefed<MediaByteBuffer> ParseH264Parameters(
+    nsTArray<uint8_t>& aHeader, const bool aAsAnnexB) {
+  size_t length = aHeader.Length();
+  auto annexB = MakeRefPtr<MediaByteBuffer>(length);
+  PodCopy(annexB->Elements(), aHeader.Elements(), length);
+  annexB->SetLength(length);
+  if (aAsAnnexB) {
+    return annexB.forget();
+  }
+
+  // Convert to avcC.
+  nsTArray<AnnexB::NALEntry> paramSets;
+  AnnexB::ParseNALEntries(
+      Span<const uint8_t>(annexB->Elements(), annexB->Length()), paramSets);
+
+  auto avcc = MakeRefPtr<MediaByteBuffer>();
+  AnnexB::NALEntry& sps = paramSets.ElementAt(0);
+  AnnexB::NALEntry& pps = paramSets.ElementAt(1);
+  const uint8_t* spsPtr = annexB->Elements() + sps.mOffset;
+  H264::WriteExtraData(
+      avcc, spsPtr[1], spsPtr[2], spsPtr[3],
+      Span<const uint8_t>(spsPtr, sps.mSize),
+      Span<const uint8_t>(annexB->Elements() + pps.mOffset, pps.mSize));
+  return avcc.forget();
+}
+
+static uint32_t GetProfile(H264_PROFILE aProfileLevel) {
+  switch (aProfileLevel) {
+    case H264_PROFILE_BASE:
+      return eAVEncH264VProfile_Base;
+    case H264_PROFILE_MAIN:
+      return eAVEncH264VProfile_Main;
+    case H264_PROFILE_HIGH:
+      return eAVEncH264VProfile_High;
+    default:
+      return eAVEncH264VProfile_unknown;
+  }
+}
+
+already_AddRefed<IMFMediaType> CreateInputType(EncoderConfig& aConfig) {
+  RefPtr<IMFMediaType> type;
+  HRESULT hr = wmf::MFCreateMediaType(getter_AddRefs(type));
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("MFCreateMediaType (input) error: %lx", hr);
+    return nullptr;
+  }
+  hr = type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create input type: SetGUID (major type) error: %lx", hr);
+    return nullptr;
+  }
+  // Always NV12 input
+  hr = type->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_NV12);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create input type: SetGUID (subtype) error: %lx", hr);
+    return nullptr;
+  }
+  hr = type->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create input type: interlace mode (input) error: %lx", hr);
+    return nullptr;
+  }
+  // WMF requires a framerate to intialize properly. Provide something
+  // reasonnable if not provided.
+  if (!aConfig.mFramerate) {
+    aConfig.mFramerate = 30;
+  }
+  if (aConfig.mFramerate) {
+    hr = MFSetAttributeRatio(type, MF_MT_FRAME_RATE, aConfig.mFramerate, 1);
+    if (FAILED(hr)) {
+      WMF_ENC_LOG("Create input type: frame rate (input) error: %lx", hr);
+      return nullptr;
+    }
+  }
+  hr = MFSetAttributeSize(type, MF_MT_FRAME_SIZE, aConfig.mSize.width,
+                          aConfig.mSize.height);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create input type: frame size (input) error: %lx", hr);
+    return nullptr;
+  }
+  return type.forget();
+}
+
+already_AddRefed<IMFMediaType> CreateOutputType(EncoderConfig& aConfig) {
+  RefPtr<IMFMediaType> type;
+  HRESULT hr = wmf::MFCreateMediaType(getter_AddRefs(type));
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("MFCreateMediaType (output) error: %lx", hr);
+    return nullptr;
+  }
+  hr = type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create output type: set major type error: %lx", hr);
+    return nullptr;
+  }
+  hr = type->SetGUID(MF_MT_SUBTYPE, CodecToSubtype(aConfig.mCodec));
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create output type: set subtype error: %lx", hr);
+    return nullptr;
+  }
+  // A bitrate need to be set here, attempt to make an educated guess if none is
+  // provided. This could be per codec to have nicer defaults.
+  size_t longDimension = std::max(aConfig.mSize.width, aConfig.mSize.height);
+  if (!aConfig.mBitrate) {
+    if (longDimension < 720) {
+      aConfig.mBitrate = 2000000;
+    } else if (longDimension < 1080) {
+      aConfig.mBitrate = 4000000;
+    } else {
+      aConfig.mBitrate = 8000000;
+    }
+  }
+  // No way to set variable / constant here.
+  hr = type->SetUINT32(MF_MT_AVG_BITRATE, aConfig.mBitrate);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create output type: set bitrate error: %lx", hr);
+    return nullptr;
+  }
+  hr = type->SetUINT32(MF_MT_INTERLACE_MODE, MFVideoInterlace_Progressive);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create output type set interlave mode error: %lx", hr);
+    return nullptr;
+  }
+  // A positive rate must always be preset here, see the Input config part.
+  MOZ_ASSERT(aConfig.mFramerate);
+  if (aConfig.mFramerate) {
+    hr = MFSetAttributeRatio(type, MF_MT_FRAME_RATE, aConfig.mFramerate, 1);
+    if (FAILED(hr)) {
+      WMF_ENC_LOG("Create output type set frame rate error: %lx", hr);
+      return nullptr;
+    }
+  }
+  // Required
+  hr = MFSetAttributeSize(type, MF_MT_FRAME_SIZE, aConfig.mSize.width,
+                          aConfig.mSize.height);
+  if (FAILED(hr)) {
+    WMF_ENC_LOG("Create output type set frame size error: %lx", hr);
+    return nullptr;
+  }
+
+  if (aConfig.mCodecSpecific) {
+    if (aConfig.mCodecSpecific->is<H264Specific>()) {
+      MOZ_ASSERT(aConfig.mCodec == CodecType::H264);
+      hr = FAILED(type->SetUINT32(
+          MF_MT_MPEG2_PROFILE,
+          GetProfile(aConfig.mCodecSpecific->as<H264Specific>().mProfile)));
+      if (hr) {
+        WMF_ENC_LOG("Create output type set profile error: %lx", hr);
+        return nullptr;
+      }
+    }
+  }
+
+  return type.forget();
+}
+
+HRESULT SetMediaTypes(RefPtr<MFTEncoder>& aEncoder, EncoderConfig& aConfig) {
+  RefPtr<IMFMediaType> inputType = CreateInputType(aConfig);
+  if (!inputType) {
+    return E_FAIL;
+  }
+
+  RefPtr<IMFMediaType> outputType = CreateOutputType(aConfig);
+  if (!outputType) {
+    return E_FAIL;
+  }
+
+  return aEncoder->SetMediaTypes(inputType, outputType);
+}
+
+}  // namespace mozilla
diff --git a/dom/media/platforms/wmf/WMFDataEncoderUtils.h b/dom/media/platforms/wmf/WMFDataEncoderUtils.h
index 19f04e768f..0bb4e00086 100644
--- a/dom/media/platforms/wmf/WMFDataEncoderUtils.h
+++ b/dom/media/platforms/wmf/WMFDataEncoderUtils.h
@@ -2,13 +2,16 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#include "WMFMediaDataEncoder.h"
-
+#ifndef WMFDATAENCODERUTILS_H_
+#define WMFDATAENCODERUTILS_H_
+#include <mfapi.h>
+#include "EncoderConfig.h"
 #include "AnnexB.h"
 #include "H264.h"
 #include "libyuv.h"
 #include "mozilla/Logging.h"
 #include "mozilla/mscom/EnsureMTA.h"
+#include "WMF.h"
 
 #define WMF_ENC_LOGD(arg, ...)                    \
   MOZ_LOG(                                        \
@@ -21,133 +24,24 @@
 
 namespace mozilla {
 
-extern LazyLogModule sPEMLog;
-
-static const GUID CodecToSubtype(CodecType aCodec) {
-  switch (aCodec) {
-    case CodecType::H264:
-      return MFVideoFormat_H264;
-    case CodecType::VP8:
-      return MFVideoFormat_VP80;
-    case CodecType::VP9:
-      return MFVideoFormat_VP90;
-    default:
-      return GUID_NULL;
-  }
-}
-
-bool CanCreateWMFEncoder(CodecType aCodec) {
-  bool canCreate = false;
-  mscom::EnsureMTA([&]() {
-    if (!wmf::MediaFoundationInitializer::HasInitialized()) {
-      return;
-    }
-    // Try HW encoder first.
-    auto enc = MakeRefPtr<MFTEncoder>(false /* HW not allowed */);
-    canCreate = SUCCEEDED(enc->Create(CodecToSubtype(aCodec)));
-    if (!canCreate) {
-      // Try SW encoder.
-      enc = MakeRefPtr<MFTEncoder>(true /* HW not allowed */);
-      canCreate = SUCCEEDED(enc->Create(CodecToSubtype(aCodec)));
-    }
-  });
-  return canCreate;
-}
-
-static already_AddRefed<MediaByteBuffer> ParseH264Parameters(
-    nsTArray<uint8_t>& aHeader, const bool aAsAnnexB) {
-  size_t length = aHeader.Length();
-  auto annexB = MakeRefPtr<MediaByteBuffer>(length);
-  PodCopy(annexB->Elements(), aHeader.Elements(), length);
-  annexB->SetLength(length);
-  if (aAsAnnexB) {
-    return annexB.forget();
-  }
+class MFTEncoder;
 
-  // Convert to avcC.
-  nsTArray<AnnexB::NALEntry> paramSets;
-  AnnexB::ParseNALEntries(
-      Span<const uint8_t>(annexB->Elements(), annexB->Length()), paramSets);
-
-  auto avcc = MakeRefPtr<MediaByteBuffer>();
-  AnnexB::NALEntry& sps = paramSets.ElementAt(0);
-  AnnexB::NALEntry& pps = paramSets.ElementAt(1);
-  const uint8_t* spsPtr = annexB->Elements() + sps.mOffset;
-  H264::WriteExtraData(
-      avcc, spsPtr[1], spsPtr[2], spsPtr[3],
-      Span<const uint8_t>(spsPtr, sps.mSize),
-      Span<const uint8_t>(annexB->Elements() + pps.mOffset, pps.mSize));
-  return avcc.forget();
-}
-
-static uint32_t GetProfile(H264_PROFILE aProfileLevel) {
-  switch (aProfileLevel) {
-    case H264_PROFILE_BASE:
-      return eAVEncH264VProfile_Base;
-    case H264_PROFILE_MAIN:
-      return eAVEncH264VProfile_Main;
-    default:
-      return eAVEncH264VProfile_unknown;
-  }
-}
+extern LazyLogModule sPEMLog;
 
-already_AddRefed<IMFMediaType> CreateInputType(EncoderConfig& aConfig) {
-  RefPtr<IMFMediaType> type;
-  return SUCCEEDED(wmf::MFCreateMediaType(getter_AddRefs(type))) &&
-                 SUCCEEDED(
-                     type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video)) &&
-                 SUCCEEDED(type->SetGUID(MF_MT_SUBTYPE, MFVideoFormat_NV12)) &&
-                 SUCCEEDED(type->SetUINT32(MF_MT_INTERLACE_MODE,
-                                           MFVideoInterlace_Progressive)) &&
-                 SUCCEEDED(MFSetAttributeRatio(type, MF_MT_FRAME_RATE,
-                                               aConfig.mFramerate, 1)) &&
-                 SUCCEEDED(MFSetAttributeSize(type, MF_MT_FRAME_SIZE,
-                                              aConfig.mSize.width,
-                                              aConfig.mSize.height))
-             ? type.forget()
-             : nullptr;
-}
+GUID CodecToSubtype(CodecType aCodec);
 
-already_AddRefed<IMFMediaType> CreateOutputType(EncoderConfig& aConfig) {
-  RefPtr<IMFMediaType> type;
-  if (FAILED(wmf::MFCreateMediaType(getter_AddRefs(type))) ||
-      FAILED(type->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Video)) ||
-      FAILED(type->SetGUID(MF_MT_SUBTYPE, CodecToSubtype(aConfig.mCodec))) ||
-      FAILED(type->SetUINT32(MF_MT_AVG_BITRATE, aConfig.mBitrate)) ||
-      FAILED(type->SetUINT32(MF_MT_INTERLACE_MODE,
-                             MFVideoInterlace_Progressive)) ||
-      FAILED(
-          MFSetAttributeRatio(type, MF_MT_FRAME_RATE, aConfig.mFramerate, 1)) ||
-      FAILED(MFSetAttributeSize(type, MF_MT_FRAME_SIZE, aConfig.mSize.width,
-                                aConfig.mSize.height))) {
-    return nullptr;
-  }
-  if (aConfig.mCodecSpecific) {
-    if (aConfig.mCodecSpecific->is<H264Specific>()) {
-      if (FAILED(type->SetUINT32(
-              MF_MT_MPEG2_PROFILE,
-              GetProfile(
-                  aConfig.mCodecSpecific->as<H264Specific>().mProfile)))) {
-        return nullptr;
-      }
-    }
-  }
+bool CanCreateWMFEncoder(CodecType aCodec);
 
-  return type.forget();
-}
+already_AddRefed<MediaByteBuffer> ParseH264Parameters(
+    nsTArray<uint8_t>& aHeader, const bool aAsAnnexB);
+uint32_t GetProfile(H264_PROFILE aProfileLevel);
 
-HRESULT SetMediaTypes(RefPtr<MFTEncoder>& aEncoder, EncoderConfig& aConfig) {
-  RefPtr<IMFMediaType> inputType = CreateInputType(aConfig);
-  if (!inputType) {
-    return E_FAIL;
-  }
+already_AddRefed<IMFMediaType> CreateInputType(EncoderConfig& aConfig);
 
-  RefPtr<IMFMediaType> outputType = CreateOutputType(aConfig);
-  if (!outputType) {
-    return E_FAIL;
-  }
+already_AddRefed<IMFMediaType> CreateOutputType(EncoderConfig& aConfig);
 
-  return aEncoder->SetMediaTypes(inputType, outputType);
-}
+HRESULT SetMediaTypes(RefPtr<MFTEncoder>& aEncoder, EncoderConfig& aConfig);
 
 }  // namespace mozilla
+
+#endif  // WMFDATAENCODERUTILS_H_
diff --git a/dom/media/platforms/wmf/WMFDecoderModule.cpp b/dom/media/platforms/wmf/WMFDecoderModule.cpp
index b3aae1e750..79556b061b 100644
--- a/dom/media/platforms/wmf/WMFDecoderModule.cpp
+++ b/dom/media/platforms/wmf/WMFDecoderModule.cpp
@@ -85,13 +85,9 @@ static bool IsRemoteAcceleratedCompositor(
          ident.mParentProcessType == GeckoProcessType_GPU;
 }
 
-static Atomic<bool> sSupportedTypesInitialized(false);
-static EnumSet<WMFStreamType> sSupportedTypes;
-static EnumSet<WMFStreamType> sLackOfExtensionTypes;
-
 /* static */
 void WMFDecoderModule::Init(Config aConfig) {
-  MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread());
+  // TODO : add an assertion to prevent this from running on main thread.
   if (XRE_IsContentProcess()) {
     // If we're in the content process and the UseGPUDecoder pref is set, it
     // means that we've given up on the GPU process (it's been crashing) so we
@@ -134,6 +130,7 @@ void WMFDecoderModule::Init(Config aConfig) {
   sDXVAEnabled = sDXVAEnabled && hwVideo;
 
   mozilla::mscom::EnsureMTA([&]() {
+    StaticMutexAutoLock lock(sMutex);
     // Store the supported MFT decoders.
     sSupportedTypes.clear();
     sLackOfExtensionTypes.clear();
@@ -163,7 +160,10 @@ void WMFDecoderModule::Init(Config aConfig) {
     }
   });
 
-  sSupportedTypesInitialized = true;
+  {
+    StaticMutexAutoLock lock(sMutex);
+    sSupportedTypesInitialized = true;
+  }
 
   WmfDecoderModuleMarkerAndLog("WMFInit Result",
                                "WMFDecoderModule::Init finishing");
@@ -270,15 +270,13 @@ HRESULT WMFDecoderModule::CreateMFTDecoder(const WMFStreamType& aType,
 /* static */
 bool WMFDecoderModule::CanCreateMFTDecoder(const WMFStreamType& aType) {
   MOZ_ASSERT(WMFStreamType::Unknown < aType && aType < WMFStreamType::SENTINEL);
-  if (!sSupportedTypesInitialized) {
-    if (NS_IsMainThread()) {
-      Init();
-    } else {
-      nsCOMPtr<nsIRunnable> runnable =
-          NS_NewRunnableFunction("WMFDecoderModule::Init", [&]() { Init(); });
-      SyncRunnable::DispatchToThread(GetMainThreadSerialEventTarget(),
-                                     runnable);
-    }
+  bool hasInitialized = false;
+  {
+    StaticMutexAutoLock lock(sMutex);
+    hasInitialized = sSupportedTypesInitialized;
+  }
+  if (!hasInitialized) {
+    Init();
   }
 
   // Check prefs here rather than CreateMFTDecoder so that prefs aren't baked
@@ -324,7 +322,7 @@ bool WMFDecoderModule::CanCreateMFTDecoder(const WMFStreamType& aType) {
         break;
     }
   }
-
+  StaticMutexAutoLock lock(sMutex);
   return sSupportedTypes.contains(aType);
 }
 
@@ -380,6 +378,7 @@ media::DecodeSupportSet WMFDecoderModule::Supports(
       return media::DecodeSupport::SoftwareDecode;
     }
   }
+  StaticMutexAutoLock lock(sMutex);
   return sLackOfExtensionTypes.contains(type)
              ? media::DecodeSupport::UnsureDueToLackOfExtension
              : media::DecodeSupportSet{};
@@ -486,6 +485,9 @@ bool WMFDecoderModule::IsHEVCSupported() {
   return sForceEnableHEVC || StaticPrefs::media_wmf_hevc_enabled() == 1;
 }
 
+/* static */
+void WMFDecoderModule::DisableForceEnableHEVC() { sForceEnableHEVC = false; }
+
 }  // namespace mozilla
 
 #undef WFM_DECODER_MODULE_STATUS_MARKER
diff --git a/dom/media/platforms/wmf/WMFDecoderModule.h b/dom/media/platforms/wmf/WMFDecoderModule.h
index 3b130fd657..6debdc5836 100644
--- a/dom/media/platforms/wmf/WMFDecoderModule.h
+++ b/dom/media/platforms/wmf/WMFDecoderModule.h
@@ -10,6 +10,7 @@
 #  include "PlatformDecoderModule.h"
 #  include "WMF.h"
 #  include "WMFUtils.h"
+#  include "mozilla/Atomics.h"
 
 namespace mozilla {
 
@@ -43,7 +44,9 @@ class WMFDecoderModule : public PlatformDecoderModule {
     ForceEnableHEVC,
   };
 
-  // Called on main thread.
+  // Can be called on any thread, but avoid calling this on the main thread
+  // because the initialization takes long time and we don't want to block the
+  // main thread.
   static void Init(Config aConfig = Config::None);
 
   // Called from any thread, must call init first
@@ -53,16 +56,24 @@ class WMFDecoderModule : public PlatformDecoderModule {
                                   RefPtr<MFTDecoder>& aDecoder);
   static bool CanCreateMFTDecoder(const WMFStreamType& aType);
 
+  static void DisableForceEnableHEVC();
+
  private:
   // This is used for GPU process only, where we can't set the preference
   // directly (it can only set in the parent process) So we need a way to force
   // enable the HEVC in order to report the support information via telemetry.
-  static inline bool sForceEnableHEVC = false;
+  static inline Atomic<bool> sForceEnableHEVC{false};
 
   static bool IsHEVCSupported();
 
   WMFDecoderModule() = default;
   virtual ~WMFDecoderModule() = default;
+
+  static inline StaticMutex sMutex;
+  static inline bool sSupportedTypesInitialized MOZ_GUARDED_BY(sMutex) = false;
+  static inline EnumSet<WMFStreamType> sSupportedTypes MOZ_GUARDED_BY(sMutex);
+  static inline EnumSet<WMFStreamType> sLackOfExtensionTypes
+      MOZ_GUARDED_BY(sMutex);
 };
 
 }  // namespace mozilla
diff --git a/dom/media/platforms/wmf/WMFEncoderModule.cpp b/dom/media/platforms/wmf/WMFEncoderModule.cpp
index 7b5af9bf50..9f44ce0c5e 100644
--- a/dom/media/platforms/wmf/WMFEncoderModule.cpp
+++ b/dom/media/platforms/wmf/WMFEncoderModule.cpp
@@ -26,6 +26,9 @@ bool WMFEncoderModule::Supports(const EncoderConfig& aConfig) const {
   if (aConfig.IsAudio()) {
     return false;
   }
+  if (aConfig.mScalabilityMode != ScalabilityMode::None) {
+    return false;
+  }
   return SupportsCodec(aConfig.mCodec);
 }
 
diff --git a/dom/media/platforms/wmf/WMFMediaDataEncoder.cpp b/dom/media/platforms/wmf/WMFMediaDataEncoder.cpp
new file mode 100644
index 0000000000..fcacedbd05
--- /dev/null
+++ b/dom/media/platforms/wmf/WMFMediaDataEncoder.cpp
@@ -0,0 +1,399 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WMFMediaDataEncoder.h"
+
+#include "ImageContainer.h"
+#include "ImageConversion.h"
+#include "MFTEncoder.h"
+#include "PlatformEncoderModule.h"
+#include "TimeUnits.h"
+#include "WMFDataEncoderUtils.h"
+#include "WMFUtils.h"
+#include <comdef.h>
+#include "mozilla/WindowsProcessMitigations.h"
+
+namespace mozilla {
+
+using InitPromise = MediaDataEncoder::InitPromise;
+using EncodePromise = MediaDataEncoder::EncodePromise;
+using ReconfigurationPromise = MediaDataEncoder::ReconfigurationPromise;
+
+WMFMediaDataEncoder::WMFMediaDataEncoder(const EncoderConfig& aConfig,
+                                         const RefPtr<TaskQueue>& aTaskQueue)
+    : mConfig(aConfig),
+      mTaskQueue(aTaskQueue),
+      mHardwareNotAllowed(aConfig.mHardwarePreference ==
+                              HardwarePreference::RequireSoftware ||
+                          IsWin32kLockedDown()) {
+  WMF_ENC_LOGE("WMFMediaDataEncoder ctor: %s, (hw not allowed: %s)",
+               aConfig.ToString().get(), mHardwareNotAllowed ? "yes" : "no");
+  MOZ_ASSERT(mTaskQueue);
+}
+
+RefPtr<InitPromise> WMFMediaDataEncoder::Init() {
+  return InvokeAsync(mTaskQueue, this, __func__,
+                     &WMFMediaDataEncoder::ProcessInit);
+}
+RefPtr<EncodePromise> WMFMediaDataEncoder::Encode(const MediaData* aSample) {
+  MOZ_ASSERT(aSample);
+
+  RefPtr<const VideoData> sample(aSample->As<const VideoData>());
+
+  return InvokeAsync<RefPtr<const VideoData>>(
+      mTaskQueue, this, __func__, &WMFMediaDataEncoder::ProcessEncode,
+      std::move(sample));
+}
+RefPtr<EncodePromise> WMFMediaDataEncoder::Drain() {
+  return InvokeAsync(mTaskQueue, __func__,
+                     [self = RefPtr<WMFMediaDataEncoder>(this)]() {
+                       nsTArray<RefPtr<IMFSample>> outputs;
+                       return SUCCEEDED(self->mEncoder->Drain(outputs))
+                                  ? self->ProcessOutputSamples(outputs)
+                                  : EncodePromise::CreateAndReject(
+                                        NS_ERROR_DOM_MEDIA_FATAL_ERR, __func__);
+                     });
+}
+RefPtr<ShutdownPromise> WMFMediaDataEncoder::Shutdown() {
+  return InvokeAsync(mTaskQueue, __func__,
+                     [self = RefPtr<WMFMediaDataEncoder>(this)]() {
+                       if (self->mEncoder) {
+                         self->mEncoder->Destroy();
+                         self->mEncoder = nullptr;
+                       }
+                       return ShutdownPromise::CreateAndResolve(true, __func__);
+                     });
+}
+RefPtr<GenericPromise> WMFMediaDataEncoder::SetBitrate(uint32_t aBitsPerSec) {
+  return InvokeAsync(
+      mTaskQueue, __func__,
+      [self = RefPtr<WMFMediaDataEncoder>(this), aBitsPerSec]() {
+        MOZ_ASSERT(self->mEncoder);
+        return SUCCEEDED(self->mEncoder->SetBitrate(aBitsPerSec))
+                   ? GenericPromise::CreateAndResolve(true, __func__)
+                   : GenericPromise::CreateAndReject(
+                         NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR, __func__);
+      });
+}
+
+RefPtr<ReconfigurationPromise> WMFMediaDataEncoder::Reconfigure(
+    const RefPtr<const EncoderConfigurationChangeList>& aConfigurationChanges) {
+  // General reconfiguration interface not implemented right now
+  return MediaDataEncoder::ReconfigurationPromise::CreateAndReject(
+      NS_ERROR_DOM_MEDIA_FATAL_ERR, __func__);
+};
+
+nsCString WMFMediaDataEncoder::GetDescriptionName() const {
+  return MFTEncoder::GetFriendlyName(CodecToSubtype(mConfig.mCodec));
+}
+
+RefPtr<InitPromise> WMFMediaDataEncoder::ProcessInit() {
+  AssertOnTaskQueue();
+
+  MOZ_ASSERT(!mEncoder,
+             "Should not initialize encoder again without shutting down");
+
+  if (!wmf::MediaFoundationInitializer::HasInitialized()) {
+    return InitPromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Can't create the MFT encoder.")),
+        __func__);
+  }
+
+  RefPtr<MFTEncoder> encoder = new MFTEncoder(mHardwareNotAllowed);
+  HRESULT hr;
+  mscom::EnsureMTA([&]() { hr = InitMFTEncoder(encoder); });
+
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("init MFTEncoder: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return InitPromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Can't create the MFT encoder.")),
+        __func__);
+  }
+
+  mEncoder = std::move(encoder);
+  FillConfigData();
+  return InitPromise::CreateAndResolve(TrackInfo::TrackType::kVideoTrack,
+                                       __func__);
+}
+
+HRESULT WMFMediaDataEncoder::InitMFTEncoder(RefPtr<MFTEncoder>& aEncoder) {
+  HRESULT hr = aEncoder->Create(CodecToSubtype(mConfig.mCodec));
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("MFTEncoder::Create: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return hr;
+  }
+
+  hr = SetMediaTypes(aEncoder, mConfig);
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("MFTEncoder::SetMediaType: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return hr;
+  }
+
+  hr = aEncoder->SetModes(mConfig.mBitrate);
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("MFTEncoder::SetMode: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return hr;
+  }
+
+  return S_OK;
+}
+
+void WMFMediaDataEncoder::FillConfigData() {
+  nsTArray<UINT8> header;
+  NS_ENSURE_TRUE_VOID(SUCCEEDED(mEncoder->GetMPEGSequenceHeader(header)));
+
+  mConfigData =
+      header.Length() > 0
+          ? ParseH264Parameters(header, mConfig.mUsage == Usage::Realtime)
+          : nullptr;
+}
+
+RefPtr<EncodePromise> WMFMediaDataEncoder::ProcessEncode(
+    RefPtr<const VideoData>&& aSample) {
+  AssertOnTaskQueue();
+  MOZ_ASSERT(mEncoder);
+  MOZ_ASSERT(aSample);
+
+  RefPtr<IMFSample> nv12 = ConvertToNV12InputSample(std::move(aSample));
+  if (!nv12 || FAILED(mEncoder->PushInput(std::move(nv12)))) {
+    WMF_ENC_LOGE("failed to process input sample");
+    return EncodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Failed to process input.")),
+        __func__);
+  }
+
+  nsTArray<RefPtr<IMFSample>> outputs;
+  HRESULT hr = mEncoder->TakeOutput(outputs);
+  if (hr == MF_E_TRANSFORM_STREAM_CHANGE) {
+    FillConfigData();
+  } else if (FAILED(hr)) {
+    WMF_ENC_LOGE("failed to process output");
+    return EncodePromise::CreateAndReject(
+        MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
+                    RESULT_DETAIL("Failed to process output.")),
+        __func__);
+  }
+
+  return ProcessOutputSamples(outputs);
+}
+
+already_AddRefed<IMFSample> WMFMediaDataEncoder::ConvertToNV12InputSample(
+    RefPtr<const VideoData>&& aData) {
+  AssertOnTaskQueue();
+  MOZ_ASSERT(mEncoder);
+
+  struct NV12Info {
+    int32_t mYStride = 0;
+    int32_t mUVStride = 0;
+    size_t mYLength = 0;
+    size_t mBufferLength = 0;
+  } info;
+
+  if (const layers::PlanarYCbCrImage* image =
+          aData->mImage->AsPlanarYCbCrImage()) {
+    // Assume this is I420. If it's not, the whole process fails in
+    // ConvertToNV12 below.
+    const layers::PlanarYCbCrData* yuv = image->GetData();
+    info.mYStride = yuv->mYStride;
+    info.mUVStride = yuv->mCbCrStride * 2;
+    info.mYLength = info.mYStride * yuv->YDataSize().height;
+    info.mBufferLength =
+        info.mYLength + (info.mUVStride * yuv->CbCrDataSize().height);
+  } else {
+    info.mYStride = aData->mImage->GetSize().width;
+    info.mUVStride = info.mYStride;
+
+    const int32_t yHeight = aData->mImage->GetSize().height;
+    const int32_t uvHeight = yHeight / 2;
+
+    CheckedInt<size_t> yLength(info.mYStride);
+    yLength *= yHeight;
+    if (!yLength.isValid()) {
+      WMF_ENC_LOGE("yLength overflows");
+      return nullptr;
+    }
+    info.mYLength = yLength.value();
+
+    CheckedInt<size_t> uvLength(info.mUVStride);
+    uvLength *= uvHeight;
+    if (!uvLength.isValid()) {
+      WMF_ENC_LOGE("uvLength overflows");
+      return nullptr;
+    }
+
+    CheckedInt<size_t> length(yLength);
+    length += uvLength;
+    if (!length.isValid()) {
+      WMF_ENC_LOGE("length overflows");
+      return nullptr;
+    }
+    info.mBufferLength = length.value();
+  }
+
+  RefPtr<IMFSample> input;
+  HRESULT hr = mEncoder->CreateInputSample(&input, info.mBufferLength);
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("CreateInputSample: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return nullptr;
+  }
+
+  RefPtr<IMFMediaBuffer> buffer;
+  hr = input->GetBufferByIndex(0, getter_AddRefs(buffer));
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("GetBufferByIndex: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return nullptr;
+  }
+
+  hr = buffer->SetCurrentLength(info.mBufferLength);
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("SetCurrentLength: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return nullptr;
+  }
+
+  LockBuffer lockBuffer(buffer);
+  hr = lockBuffer.Result();
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("LockBuffer: error = 0x%lX, %ls", hr, error.ErrorMessage());
+    return nullptr;
+  }
+
+  nsresult rv =
+      ConvertToNV12(aData->mImage, lockBuffer.Data(), info.mYStride,
+                    lockBuffer.Data() + info.mYLength, info.mUVStride);
+  if (NS_FAILED(rv)) {
+    WMF_ENC_LOGE("Failed to convert to NV12");
+    return nullptr;
+  }
+
+  hr = input->SetSampleTime(UsecsToHNs(aData->mTime.ToMicroseconds()));
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("SetSampleTime: error = 0x%lX, %ls", hr, error.ErrorMessage());
+    return nullptr;
+  }
+
+  hr = input->SetSampleDuration(UsecsToHNs(aData->mDuration.ToMicroseconds()));
+  if (FAILED(hr)) {
+    _com_error error(hr);
+    WMF_ENC_LOGE("SetSampleDuration: error = 0x%lX, %ls", hr,
+                 error.ErrorMessage());
+    return nullptr;
+  }
+
+  return input.forget();
+}
+
+RefPtr<EncodePromise> WMFMediaDataEncoder::ProcessOutputSamples(
+    nsTArray<RefPtr<IMFSample>>& aSamples) {
+  EncodedData frames;
+  for (auto sample : aSamples) {
+    RefPtr<MediaRawData> frame = IMFSampleToMediaData(sample);
+    if (frame) {
+      frames.AppendElement(std::move(frame));
+    } else {
+      WMF_ENC_LOGE("failed to convert output frame");
+    }
+  }
+  aSamples.Clear();
+  return EncodePromise::CreateAndResolve(std::move(frames), __func__);
+}
+
+already_AddRefed<MediaRawData> WMFMediaDataEncoder::IMFSampleToMediaData(
+    RefPtr<IMFSample>& aSample) {
+  AssertOnTaskQueue();
+  MOZ_ASSERT(aSample);
+
+  RefPtr<IMFMediaBuffer> buffer;
+  HRESULT hr = aSample->GetBufferByIndex(0, getter_AddRefs(buffer));
+  NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
+
+  LockBuffer lockBuffer(buffer);
+  NS_ENSURE_TRUE(SUCCEEDED(lockBuffer.Result()), nullptr);
+
+  LONGLONG time = 0;
+  hr = aSample->GetSampleTime(&time);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
+
+  LONGLONG duration = 0;
+  hr = aSample->GetSampleDuration(&duration);
+  NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
+
+  bool isKeyframe =
+      MFGetAttributeUINT32(aSample, MFSampleExtension_CleanPoint, false);
+
+  auto frame = MakeRefPtr<MediaRawData>();
+  if (!WriteFrameData(frame, lockBuffer, isKeyframe)) {
+    return nullptr;
+  }
+
+  frame->mTime = media::TimeUnit::FromMicroseconds(HNsToUsecs(time));
+  frame->mDuration = media::TimeUnit::FromMicroseconds(HNsToUsecs(duration));
+  frame->mKeyframe = isKeyframe;
+
+  return frame.forget();
+}
+
+bool WMFMediaDataEncoder::WriteFrameData(RefPtr<MediaRawData>& aDest,
+                                         LockBuffer& aSrc, bool aIsKeyframe) {
+  if (mConfig.mCodec == CodecType::H264) {
+    size_t prependLength = 0;
+    RefPtr<MediaByteBuffer> avccHeader;
+    if (aIsKeyframe && mConfigData) {
+      if (mConfig.mUsage == Usage::Realtime) {
+        prependLength = mConfigData->Length();
+      } else {
+        avccHeader = mConfigData;
+      }
+    }
+
+    UniquePtr<MediaRawDataWriter> writer(aDest->CreateWriter());
+    if (!writer->SetSize(prependLength + aSrc.Length())) {
+      WMF_ENC_LOGE("fail to allocate output buffer");
+      return false;
+    }
+
+    if (prependLength > 0) {
+      PodCopy(writer->Data(), mConfigData->Elements(), prependLength);
+    }
+    PodCopy(writer->Data() + prependLength, aSrc.Data(), aSrc.Length());
+
+    if (mConfig.mUsage != Usage::Realtime &&
+        !AnnexB::ConvertSampleToAVCC(aDest, avccHeader)) {
+      WMF_ENC_LOGE("fail to convert annex-b sample to AVCC");
+      return false;
+    }
+
+    return true;
+  }
+  UniquePtr<MediaRawDataWriter> writer(aDest->CreateWriter());
+  if (!writer->SetSize(aSrc.Length())) {
+    WMF_ENC_LOGE("fail to allocate output buffer");
+    return false;
+  }
+
+  PodCopy(writer->Data(), aSrc.Data(), aSrc.Length());
+  return true;
+}
+
+}  // namespace mozilla
diff --git a/dom/media/platforms/wmf/WMFMediaDataEncoder.h b/dom/media/platforms/wmf/WMFMediaDataEncoder.h
index 31a63c8347..db1077e699 100644
--- a/dom/media/platforms/wmf/WMFMediaDataEncoder.h
+++ b/dom/media/platforms/wmf/WMFMediaDataEncoder.h
@@ -7,84 +7,30 @@
 #ifndef WMFMediaDataEncoder_h_
 #define WMFMediaDataEncoder_h_
 
-#include "ImageContainer.h"
 #include "MFTEncoder.h"
 #include "PlatformEncoderModule.h"
-#include "TimeUnits.h"
 #include "WMFDataEncoderUtils.h"
 #include "WMFUtils.h"
+#include <comdef.h>
+#include "mozilla/WindowsProcessMitigations.h"
 
 namespace mozilla {
 
 class WMFMediaDataEncoder final : public MediaDataEncoder {
  public:
   WMFMediaDataEncoder(const EncoderConfig& aConfig,
-                      const RefPtr<TaskQueue>& aTaskQueue)
-      : mConfig(aConfig),
-        mTaskQueue(aTaskQueue),
-        mHardwareNotAllowed(aConfig.mHardwarePreference ==
-                                HardwarePreference::RequireSoftware ||
-                            aConfig.mHardwarePreference ==
-                                HardwarePreference::None) {
-    MOZ_ASSERT(mTaskQueue);
-  }
+                      const RefPtr<TaskQueue>& aTaskQueue);
 
-  RefPtr<InitPromise> Init() override {
-    return InvokeAsync(mTaskQueue, this, __func__,
-                       &WMFMediaDataEncoder::ProcessInit);
-  }
-  RefPtr<EncodePromise> Encode(const MediaData* aSample) override {
-    MOZ_ASSERT(aSample);
-
-    RefPtr<const VideoData> sample(aSample->As<const VideoData>());
-
-    return InvokeAsync<RefPtr<const VideoData>>(
-        mTaskQueue, this, __func__, &WMFMediaDataEncoder::ProcessEncode,
-        std::move(sample));
-  }
-  RefPtr<EncodePromise> Drain() override {
-    return InvokeAsync(
-        mTaskQueue, __func__, [self = RefPtr<WMFMediaDataEncoder>(this)]() {
-          nsTArray<RefPtr<IMFSample>> outputs;
-          return SUCCEEDED(self->mEncoder->Drain(outputs))
-                     ? self->ProcessOutputSamples(outputs)
-                     : EncodePromise::CreateAndReject(
-                           NS_ERROR_DOM_MEDIA_FATAL_ERR, __func__);
-        });
-  }
-  RefPtr<ShutdownPromise> Shutdown() override {
-    return InvokeAsync(
-        mTaskQueue, __func__, [self = RefPtr<WMFMediaDataEncoder>(this)]() {
-          if (self->mEncoder) {
-            self->mEncoder->Destroy();
-            self->mEncoder = nullptr;
-          }
-          return ShutdownPromise::CreateAndResolve(true, __func__);
-        });
-  }
-  RefPtr<GenericPromise> SetBitrate(uint32_t aBitsPerSec) override {
-    return InvokeAsync(
-        mTaskQueue, __func__,
-        [self = RefPtr<WMFMediaDataEncoder>(this), aBitsPerSec]() {
-          MOZ_ASSERT(self->mEncoder);
-          return SUCCEEDED(self->mEncoder->SetBitrate(aBitsPerSec))
-                     ? GenericPromise::CreateAndResolve(true, __func__)
-                     : GenericPromise::CreateAndReject(
-                           NS_ERROR_DOM_MEDIA_NOT_SUPPORTED_ERR, __func__);
-        });
-  }
+  RefPtr<InitPromise> Init() override;
+  RefPtr<EncodePromise> Encode(const MediaData* aSample) override;
+  RefPtr<EncodePromise> Drain() override;
+  RefPtr<ShutdownPromise> Shutdown() override;
+  RefPtr<GenericPromise> SetBitrate(uint32_t aBitsPerSec) override;
 
   RefPtr<ReconfigurationPromise> Reconfigure(
       const RefPtr<const EncoderConfigurationChangeList>& aConfigurationChanges)
-      override {
-    // General reconfiguration interface not implemented right now
-    return MediaDataEncoder::ReconfigurationPromise::CreateAndReject(
-        NS_ERROR_DOM_MEDIA_FATAL_ERR, __func__);
-  };
-
-  nsCString GetDescriptionName() const override {
-    return MFTEncoder::GetFriendlyName(CodecToSubtype(mConfig.mCodec));
-  }
+      override;
+  nsCString GetDescriptionName() const override;
 
  private:
   // Automatically lock/unlock IMFMediaBuffer.
@@ -107,233 +53,29 @@ class WMFMediaDataEncoder final : public MediaDataEncoder {
 
    private:
     RefPtr<IMFMediaBuffer> mBuffer;
-    BYTE* mBytes;
-    DWORD mCapacity;
-    DWORD mLength;
-    HRESULT mResult;
+    BYTE* mBytes{};
+    DWORD mCapacity{};
+    DWORD mLength{};
+    HRESULT mResult{};
   };
 
-  RefPtr<InitPromise> ProcessInit() {
-    AssertOnTaskQueue();
-
-    MOZ_ASSERT(!mEncoder,
-               "Should not initialize encoder again without shutting down");
-
-    if (!wmf::MediaFoundationInitializer::HasInitialized()) {
-      return InitPromise::CreateAndReject(
-          MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
-                      RESULT_DETAIL("Can't create the MFT encoder.")),
-          __func__);
-    }
-
-    RefPtr<MFTEncoder> encoder = new MFTEncoder(mHardwareNotAllowed);
-    HRESULT hr;
-    mscom::EnsureMTA([&]() { hr = InitMFTEncoder(encoder); });
-
-    if (FAILED(hr)) {
-      WMF_ENC_LOGE("init MFTEncoder: error = 0x%lX", hr);
-      return InitPromise::CreateAndReject(
-          MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
-                      RESULT_DETAIL("Can't create the MFT encoder.")),
-          __func__);
-    }
-
-    mEncoder = std::move(encoder);
-    FillConfigData();
-    return InitPromise::CreateAndResolve(TrackInfo::TrackType::kVideoTrack,
-                                         __func__);
-  }
-
-  HRESULT InitMFTEncoder(RefPtr<MFTEncoder>& aEncoder) {
-    HRESULT hr = aEncoder->Create(CodecToSubtype(mConfig.mCodec));
-    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
-
-    hr = SetMediaTypes(aEncoder, mConfig);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
-
-    hr = aEncoder->SetModes(mConfig.mBitrate);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  RefPtr<InitPromise> ProcessInit();
 
-    return S_OK;
-  }
+  HRESULT InitMFTEncoder(RefPtr<MFTEncoder>& aEncoder);
+  void FillConfigData();
 
-  void FillConfigData() {
-    nsTArray<UINT8> header;
-    NS_ENSURE_TRUE_VOID(SUCCEEDED(mEncoder->GetMPEGSequenceHeader(header)));
-
-    mConfigData =
-        header.Length() > 0
-            ? ParseH264Parameters(header, mConfig.mUsage == Usage::Realtime)
-            : nullptr;
-  }
-
-  RefPtr<EncodePromise> ProcessEncode(RefPtr<const VideoData>&& aSample) {
-    AssertOnTaskQueue();
-    MOZ_ASSERT(mEncoder);
-    MOZ_ASSERT(aSample);
-
-    RefPtr<IMFSample> nv12 = ConvertToNV12InputSample(std::move(aSample));
-    if (!nv12 || FAILED(mEncoder->PushInput(std::move(nv12)))) {
-      WMF_ENC_LOGE("failed to process input sample");
-      return EncodePromise::CreateAndReject(
-          MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
-                      RESULT_DETAIL("Failed to process input.")),
-          __func__);
-    }
-
-    nsTArray<RefPtr<IMFSample>> outputs;
-    HRESULT hr = mEncoder->TakeOutput(outputs);
-    if (hr == MF_E_TRANSFORM_STREAM_CHANGE) {
-      FillConfigData();
-    } else if (FAILED(hr)) {
-      WMF_ENC_LOGE("failed to process output");
-      return EncodePromise::CreateAndReject(
-          MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
-                      RESULT_DETAIL("Failed to process output.")),
-          __func__);
-    }
-
-    return ProcessOutputSamples(outputs);
-  }
+  RefPtr<EncodePromise> ProcessEncode(RefPtr<const VideoData>&& aSample);
 
   already_AddRefed<IMFSample> ConvertToNV12InputSample(
-      RefPtr<const VideoData>&& aData) {
-    AssertOnTaskQueue();
-    MOZ_ASSERT(mEncoder);
-
-    const layers::PlanarYCbCrImage* image = aData->mImage->AsPlanarYCbCrImage();
-    // TODO: Take care non planar Y-Cb-Cr image (Bug 1881647).
-    NS_ENSURE_TRUE(image, nullptr);
-
-    const layers::PlanarYCbCrData* yuv = image->GetData();
-    auto ySize = yuv->YDataSize();
-    auto cbcrSize = yuv->CbCrDataSize();
-    size_t yLength = yuv->mYStride * ySize.height;
-    size_t length = yLength + (yuv->mCbCrStride * cbcrSize.height * 2);
-
-    RefPtr<IMFSample> input;
-    HRESULT hr = mEncoder->CreateInputSample(&input, length);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    RefPtr<IMFMediaBuffer> buffer;
-    hr = input->GetBufferByIndex(0, getter_AddRefs(buffer));
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    hr = buffer->SetCurrentLength(length);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    LockBuffer lockBuffer(buffer);
-    NS_ENSURE_TRUE(SUCCEEDED(lockBuffer.Result()), nullptr);
-
-    // TODO: Take care non I420 image (Bug 1881647).
-    bool ok = libyuv::I420ToNV12(
-                  yuv->mYChannel, yuv->mYStride, yuv->mCbChannel,
-                  yuv->mCbCrStride, yuv->mCrChannel, yuv->mCbCrStride,
-                  lockBuffer.Data(), yuv->mYStride, lockBuffer.Data() + yLength,
-                  yuv->mCbCrStride * 2, ySize.width, ySize.height) == 0;
-    NS_ENSURE_TRUE(ok, nullptr);
-
-    hr = input->SetSampleTime(UsecsToHNs(aData->mTime.ToMicroseconds()));
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    hr =
-        input->SetSampleDuration(UsecsToHNs(aData->mDuration.ToMicroseconds()));
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    return input.forget();
-  }
+      RefPtr<const VideoData>&& aData);
 
   RefPtr<EncodePromise> ProcessOutputSamples(
-      nsTArray<RefPtr<IMFSample>>& aSamples) {
-    EncodedData frames;
-    for (auto sample : aSamples) {
-      RefPtr<MediaRawData> frame = IMFSampleToMediaData(sample);
-      if (frame) {
-        frames.AppendElement(std::move(frame));
-      } else {
-        WMF_ENC_LOGE("failed to convert output frame");
-      }
-    }
-    aSamples.Clear();
-    return EncodePromise::CreateAndResolve(std::move(frames), __func__);
-  }
-
+      nsTArray<RefPtr<IMFSample>>& aSamples);
   already_AddRefed<MediaRawData> IMFSampleToMediaData(
-      RefPtr<IMFSample>& aSample) {
-    AssertOnTaskQueue();
-    MOZ_ASSERT(aSample);
-
-    RefPtr<IMFMediaBuffer> buffer;
-    HRESULT hr = aSample->GetBufferByIndex(0, getter_AddRefs(buffer));
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    LockBuffer lockBuffer(buffer);
-    NS_ENSURE_TRUE(SUCCEEDED(lockBuffer.Result()), nullptr);
-
-    LONGLONG time = 0;
-    hr = aSample->GetSampleTime(&time);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    LONGLONG duration = 0;
-    hr = aSample->GetSampleDuration(&duration);
-    NS_ENSURE_TRUE(SUCCEEDED(hr), nullptr);
-
-    bool isKeyframe =
-        MFGetAttributeUINT32(aSample, MFSampleExtension_CleanPoint, false);
-
-    auto frame = MakeRefPtr<MediaRawData>();
-    if (!WriteFrameData(frame, lockBuffer, isKeyframe)) {
-      return nullptr;
-    }
-
-    frame->mTime = media::TimeUnit::FromMicroseconds(HNsToUsecs(time));
-    frame->mDuration = media::TimeUnit::FromMicroseconds(HNsToUsecs(duration));
-    frame->mKeyframe = isKeyframe;
-
-    return frame.forget();
-  }
+      RefPtr<IMFSample>& aSample);
 
   bool WriteFrameData(RefPtr<MediaRawData>& aDest, LockBuffer& aSrc,
-                      bool aIsKeyframe) {
-    if (mConfig.mCodec == CodecType::H264) {
-      size_t prependLength = 0;
-      RefPtr<MediaByteBuffer> avccHeader;
-      if (aIsKeyframe && mConfigData) {
-        if (mConfig.mUsage == Usage::Realtime) {
-          prependLength = mConfigData->Length();
-        } else {
-          avccHeader = mConfigData;
-        }
-      }
-
-      UniquePtr<MediaRawDataWriter> writer(aDest->CreateWriter());
-      if (!writer->SetSize(prependLength + aSrc.Length())) {
-        WMF_ENC_LOGE("fail to allocate output buffer");
-        return false;
-      }
-
-      if (prependLength > 0) {
-        PodCopy(writer->Data(), mConfigData->Elements(), prependLength);
-      }
-      PodCopy(writer->Data() + prependLength, aSrc.Data(), aSrc.Length());
-
-      if (mConfig.mUsage != Usage::Realtime &&
-          !AnnexB::ConvertSampleToAVCC(aDest, avccHeader)) {
-        WMF_ENC_LOGE("fail to convert annex-b sample to AVCC");
-        return false;
-      }
-
-      return true;
-    }
-    UniquePtr<MediaRawDataWriter> writer(aDest->CreateWriter());
-    if (!writer->SetSize(aSrc.Length())) {
-      WMF_ENC_LOGE("fail to allocate output buffer");
-      return false;
-    }
-
-    PodCopy(writer->Data(), aSrc.Data(), aSrc.Length());
-    return true;
-  }
+                      bool aIsKeyframe);
 
   void AssertOnTaskQueue() { MOZ_ASSERT(mTaskQueue->IsCurrentThreadIn()); }
 
diff --git a/dom/media/platforms/wmf/WMFVideoMFTManager.cpp b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
index 65480c4a01..2344de94d9 100644
--- a/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
+++ b/dom/media/platforms/wmf/WMFVideoMFTManager.cpp
@@ -711,6 +711,8 @@ WMFVideoMFTManager::CreateBasicVideoFrame(IMFSample* aSample,
       aStage.SetImageFormat(DecodeStage::P016);
     }
     aStage.SetResolution(videoWidth, videoHeight);
+    aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                  v->GetEndTime().ToMicroseconds());
   });
 
   v.forget(aOutVideoData);
@@ -753,7 +755,6 @@ WMFVideoMFTManager::CreateD3DVideoFrame(IMFSample* aSample,
       TimeUnit::FromMicroseconds(-1));
 
   NS_ENSURE_TRUE(v, E_FAIL);
-  v.forget(aOutVideoData);
 
   mPerformanceRecorder.Record(pts.ToMicroseconds(), [&](DecodeStage& aStage) {
     aStage.SetColorDepth(mVideoInfo.mColorDepth);
@@ -771,8 +772,11 @@ WMFVideoMFTManager::CreateD3DVideoFrame(IMFSample* aSample,
       aStage.SetImageFormat(DecodeStage::P016);
     }
     aStage.SetResolution(size.width, size.height);
+    aStage.SetStartTimeAndEndTime(v->mTime.ToMicroseconds(),
+                                  v->GetEndTime().ToMicroseconds());
   });
 
+  v.forget(aOutVideoData);
   return S_OK;
 }
 
diff --git a/dom/media/platforms/wmf/moz.build b/dom/media/platforms/wmf/moz.build
index 9e0f3aa94a..13f754af29 100644
--- a/dom/media/platforms/wmf/moz.build
+++ b/dom/media/platforms/wmf/moz.build
@@ -57,9 +57,11 @@ UNIFIED_SOURCES += [
     "MFTDecoder.cpp",
     "MFTEncoder.cpp",
     "WMFAudioMFTManager.cpp",
+    "WMFDataEncoderUtils.cpp",
     "WMFDecoderModule.cpp",
     "WMFEncoderModule.cpp",
     "WMFMediaDataDecoder.cpp",
+    "WMFMediaDataEncoder.cpp",
     "WMFVideoMFTManager.cpp",
 ]
 
diff --git a/dom/media/test/complete_length_worker.js b/dom/media/test/complete_length_worker.js
new file mode 100644
index 0000000000..ceda63fdd5
--- /dev/null
+++ b/dom/media/test/complete_length_worker.js
@@ -0,0 +1,80 @@
+"use strict";
+
+let client;
+function is(got, expected, name) {
+  client.postMessage({ type: "is", got, expected, name });
+}
+
+self.onactivate = e =>
+  e.waitUntil(
+    (async () => {
+      await self.clients.claim();
+      const allClients = await self.clients.matchAll();
+      client = allClients[0];
+      is(allClients.length, 1, "allClients.length");
+    })()
+  );
+
+let expected_start = 0;
+let response_data = [
+  // One Array element for each response in order:
+  {
+    complete_length: "*",
+    body: "O",
+  },
+  {
+    complete_length: "3",
+    body: "g",
+  },
+  {
+    // Extend length to test that the remainder is fetched.
+    complete_length: "6",
+    body: "g",
+  },
+  {
+    // Reduce length to test that no more is fetched.
+    complete_length: "4",
+    body: "S",
+  },
+];
+
+self.onfetch = e => {
+  if (!e.request.url.endsWith("/media-resource")) {
+    return; // fall back to network fetch
+  }
+  is(
+    response_data.length >= 1,
+    true,
+    `response_data.length (${response_data.length}) > 0`
+  );
+  const { complete_length, body } = response_data.shift();
+  const range = e.request.headers.get("Range");
+  const match = range.match(/^bytes=(\d+)-/);
+  is(Array.isArray(match), true, `Array.isArray(match) for ${range}`);
+  const first = parseInt(match[1]);
+  is(first, expected_start, "first");
+  const last = first + body.length - 1; // inclusive
+  expected_start = last + 1;
+  const init = {
+    status: 206, // Partial Content
+    headers: {
+      "Accept-Ranges": "bytes",
+      "Content-Type": "audio/ogg",
+      "Content-Range": `bytes ${first}-${last}/${complete_length}`,
+      "Content-Length": body.length,
+    },
+  };
+  e.respondWith(new Response(body, init));
+};
+
+self.onmessage = e => {
+  switch (e.data.type) {
+    case "got error event":
+      // Check that all expected requests were received.
+      is(response_data.length, 0, "missing fetch count");
+      client.postMessage({ type: "done" });
+      return;
+    default:
+      is(e.data.type, "__KNOWN__", "e.data.type");
+  }
+};
diff --git a/dom/media/test/mochitest.toml b/dom/media/test/mochitest.toml
index 99bd1c41c8..2490bef305 100644
--- a/dom/media/test/mochitest.toml
+++ b/dom/media/test/mochitest.toml
@@ -444,6 +444,7 @@ support-files = [
   "chained-audio-video.ogg^headers^",
   "chromeHelper.js",
   "cloneElementVisually_helpers.js",
+  "complete_length_worker.js",
   "contentType.sjs",
   "detodos.opus",
   "detodos.opus^headers^",
@@ -767,6 +768,9 @@ tags = "cloneelementvisually"
 ["test_clone_media_element.html"]
 skip-if = ["os == 'android'"] # bug 1108558, android(bug 1232305)
 
+["test_complete_length.html"]
+scheme = "https"
+
 ["test_fastSeek-forwards.html"]
 
 ["test_fastSeek.html"]
diff --git a/dom/media/test/rdd_process_xpcom/RddProcessTest.cpp b/dom/media/test/rdd_process_xpcom/RddProcessTest.cpp
index fad7d6ee2e..c3e61e3f11 100644
--- a/dom/media/test/rdd_process_xpcom/RddProcessTest.cpp
+++ b/dom/media/test/rdd_process_xpcom/RddProcessTest.cpp
@@ -49,8 +49,7 @@ RddProcessTest::TestTelemetryProbes(JSContext* aCx,
         promise->MaybeResolve((int32_t)rddProc->RDDProcessPid());
       },
       [promise](nsresult aError) {
-        MOZ_ASSERT_UNREACHABLE("RddProcessTest; failure to get RDD child");
-        promise->MaybeReject(aError);
+        MOZ_CRASH("RddProcessTest; failure to get RDD child");
       });
 
   promise.forget(aOutPromise);
diff --git a/dom/media/test/reftest/reftest.list b/dom/media/test/reftest/reftest.list
index bd4cb2d030..8d39975d5a 100644
--- a/dom/media/test/reftest/reftest.list
+++ b/dom/media/test/reftest/reftest.list
@@ -11,5 +11,5 @@ skip-if(Android) fuzzy(0-31,0-573249) fuzzy-if(appleSilicon,0-37,0-543189) == im
 skip-if(Android) fuzzy(0-84,0-774213) fails-if(useDrawSnapshot) == uneven_frame_duration_video.html uneven_frame_duration_video-ref.html # Skip on Windows 7 as the resolution of the video is too high for test machines and will fail in the decoder.
 # Set media.dormant-on-pause-timeout-ms to avoid decoders becoming dormant and busting test, skip on android as test is too noisy and unstable
 skip-if(Android) pref(media.dormant-on-pause-timeout-ms,-1) fuzzy(0-20,0-500) == frame_order_mp4.html frame_order_mp4-ref.html
-skip-if(Android) fuzzy(0-30,0-270000) == incorrect_display_in_bytestream_vp8.html incorrect_display_in_bytestream_vp8-ref.html
+skip-if(Android) fuzzy(0-31,0-270000) == incorrect_display_in_bytestream_vp8.html incorrect_display_in_bytestream_vp8-ref.html
 skip-if(Android) fuzzy(0-22,0-381481) == incorrect_display_in_bytestream_vp9.html incorrect_display_in_bytestream_vp9-ref.html
diff --git a/dom/media/test/test_complete_length.html b/dom/media/test/test_complete_length.html
new file mode 100644
index 0000000000..576b00dac2
--- /dev/null
+++ b/dom/media/test/test_complete_length.html
@@ -0,0 +1,49 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test different complete-length fields of Content-Range headers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="/tests/dom/serviceworkers/test/utils.js"></script>
+  <link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<script>
+"use strict";
+
+let oncomplete;
+navigator.serviceWorker.addEventListener("message", e => {
+  switch (e.data.type) {
+  case "is":
+    is(e.data.got, e.data.expected, e.data.name);
+    break;
+  case "done":
+    oncomplete();
+    break;
+  default:
+    record(false, "unknown e.data.type", e.data.type);
+  }
+});
+
+add_task(async () => {
+  // Unregister any previous ServiceWorkerRegistrations that may not have been
+  // removed before a page reload.
+  await unregisterAll();
+  const registration =
+        await registerAndWaitForActive("complete_length_worker.js");
+  SimpleTest.registerCleanupFunction(() => registration.unregister());
+
+  const audio = new Audio("media-resource");
+  audio.preload = "metadata";
+  // An error event is generated because the resource is incomplete.
+  const error_promise = new Promise(r => audio.onerror = r);
+  await error_promise;
+  is(audio.error.code, MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED, "error.code");
+  is(audio.error.message, "NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)",
+     "error.message");
+
+  // Tell the ServiceWorker that media-resource requests have completed.
+  navigator.serviceWorker.controller.postMessage({type: "got error event"});
+  await new Promise(r => oncomplete = r);
+});
+</script>
+</html>
diff --git a/dom/media/tests/crashtests/crashtests.list b/dom/media/tests/crashtests/crashtests.list
index fd4ed80607..96c296a9fa 100644
--- a/dom/media/tests/crashtests/crashtests.list
+++ b/dom/media/tests/crashtests/crashtests.list
@@ -31,8 +31,8 @@ load 1511130.html
 load 1510848.html
 load 1516292.html
 load 1576938.html
-skip-if(Android) pref(media.getusermedia.audiocapture.enabled,true) load 1573536.html
-skip-if(!Android) pref(media.getusermedia.audiocapture.enabled,true) pref(media.navigator.permission.device,false) load 1573536.html # media.navigator.permission.device is mobile-only, so other platforms fail to set it (Bug 1350948)
+skip-if(Android) pref(media.getusermedia.audio.capture.enabled,true) load 1573536.html
+skip-if(!Android) pref(media.getusermedia.audio.capture.enabled,true) pref(media.navigator.permission.device,false) load 1573536.html # media.navigator.permission.device is mobile-only, so other platforms fail to set it (Bug 1350948)
 load 1594136.html
 load 1749308.html
 load 1764915.html
diff --git a/dom/media/utils/PerformanceRecorder.cpp b/dom/media/utils/PerformanceRecorder.cpp
index 3dc2c24a5d..dda76e0d99 100644
--- a/dom/media/utils/PerformanceRecorder.cpp
+++ b/dom/media/utils/PerformanceRecorder.cpp
@@ -245,6 +245,19 @@ ProfilerString8View PlaybackStage::Name() const {
   return *mName;
 }
 
+void PlaybackStage::AddMarker(MarkerOptions&& aOption) {
+  if (mStartAndEndTimeUs) {
+    auto& pair = *mStartAndEndTimeUs;
+    profiler_add_marker(Name(), Category(),
+                        std::forward<MarkerOptions&&>(aOption),
+                        geckoprofiler::markers::MediaSampleMarker{}, pair.first,
+                        pair.second, 1 /* queue length */);
+  } else {
+    profiler_add_marker(Name(), Category(),
+                        std::forward<MarkerOptions&&>(aOption));
+  }
+}
+
 ProfilerString8View CaptureStage::Name() const {
   if (!mName) {
     auto imageTypeToStr = [](ImageType aType) -> const char* {
@@ -307,4 +320,17 @@ ProfilerString8View DecodeStage::Name() const {
   return *mName;
 }
 
+void DecodeStage::AddMarker(MarkerOptions&& aOption) {
+  if (mStartAndEndTimeUs) {
+    auto& pair = *mStartAndEndTimeUs;
+    profiler_add_marker(Name(), Category(),
+                        std::forward<MarkerOptions&&>(aOption),
+                        geckoprofiler::markers::MediaSampleMarker{}, pair.first,
+                        pair.second, 1 /* queue length */);
+  } else {
+    profiler_add_marker(Name(), Category(),
+                        std::forward<MarkerOptions&&>(aOption));
+  }
+}
+
 }  // namespace mozilla
diff --git a/dom/media/utils/PerformanceRecorder.h b/dom/media/utils/PerformanceRecorder.h
index e423c3fb5d..95fdab90ba 100644
--- a/dom/media/utils/PerformanceRecorder.h
+++ b/dom/media/utils/PerformanceRecorder.h
@@ -8,11 +8,13 @@
 #define mozilla_PerformanceRecorder_h
 
 #include <type_traits>
+#include <utility>
 
 #include "mozilla/Attributes.h"
 #include "mozilla/BaseProfilerMarkersPrerequisites.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/Mutex.h"
+#include "mozilla/ProfilerMarkerTypes.h"
 #include "mozilla/TimeStamp.h"
 #include "mozilla/TypedEnumBits.h"
 #include "nsStringFwd.h"
@@ -118,7 +120,19 @@ enum class MediaStage : uint8_t {
   CopyDecodedVideo,
 };
 
-class PlaybackStage {
+class StageBase {
+ public:
+  virtual void AddMarker(MarkerOptions&& aOption) {
+    profiler_add_marker(Name(), Category(),
+                        std::forward<MarkerOptions&&>(aOption));
+  }
+
+ protected:
+  virtual ProfilerString8View Name() const = 0;
+  virtual const MarkerCategory& Category() const = 0;
+};
+
+class PlaybackStage : public StageBase {
  public:
   explicit PlaybackStage(MediaStage aStage, int32_t aHeight = 0,
                          MediaInfoFlag aFlag = MediaInfoFlag::None)
@@ -126,20 +140,28 @@ class PlaybackStage {
     MOZ_ASSERT(aStage != MediaStage::Invalid);
   }
 
-  ProfilerString8View Name() const;
-  const MarkerCategory& Category() const {
+  ProfilerString8View Name() const override;
+  const MarkerCategory& Category() const override {
     return baseprofiler::category::MEDIA_PLAYBACK;
   }
+  void AddMarker(MarkerOptions&& aOption) override;
+
+  void SetStartTimeAndEndTime(uint64_t aStartTime, uint64_t aEndTime) {
+    mStartAndEndTimeUs =
+        Some(std::pair<uint64_t, uint64_t>{aStartTime, aEndTime});
+  }
 
   MediaStage mStage;
   int32_t mHeight;
   MediaInfoFlag mFlag;
 
+  Maybe<std::pair<uint64_t, uint64_t>> mStartAndEndTimeUs;
+
  private:
   mutable Maybe<nsCString> mName;
 };
 
-class CaptureStage {
+class CaptureStage : public StageBase {
  public:
   enum class ImageType : uint8_t {
     Unknown,
@@ -160,8 +182,8 @@ class CaptureStage {
         mHeight(aHeight),
         mImageType(aImageType) {}
 
-  ProfilerString8View Name() const;
-  const MarkerCategory& Category() const {
+  ProfilerString8View Name() const override;
+  const MarkerCategory& Category() const override {
     return baseprofiler::category::MEDIA_RT;
   }
 
@@ -175,7 +197,7 @@ class CaptureStage {
   mutable Maybe<nsCString> mName;
 };
 
-class CopyVideoStage {
+class CopyVideoStage : public StageBase {
  public:
   CopyVideoStage(nsCString aSource, TrackingId aTrackingId, int32_t aWidth,
                  int32_t aHeight)
@@ -184,8 +206,8 @@ class CopyVideoStage {
         mWidth(aWidth),
         mHeight(aHeight) {}
 
-  ProfilerString8View Name() const;
-  const MarkerCategory& Category() const {
+  ProfilerString8View Name() const override;
+  const MarkerCategory& Category() const override {
     return baseprofiler::category::MEDIA_RT;
   }
 
@@ -201,7 +223,7 @@ class CopyVideoStage {
   mutable Maybe<nsCString> mName;
 };
 
-class DecodeStage {
+class DecodeStage : public StageBase {
  public:
   enum ImageFormat : uint8_t {
     YUV420P,
@@ -223,8 +245,8 @@ class DecodeStage {
       : mSource(std::move(aSource)),
         mTrackingId(std::move(aTrackingId)),
         mFlag(aFlag) {}
-  ProfilerString8View Name() const;
-  const MarkerCategory& Category() const {
+  ProfilerString8View Name() const override;
+  const MarkerCategory& Category() const override {
     return baseprofiler::category::MEDIA_PLAYBACK;
   }
 
@@ -242,6 +264,11 @@ class DecodeStage {
   void SetColorDepth(gfx::ColorDepth aColorDepth) {
     mColorDepth = Some(aColorDepth);
   }
+  void SetStartTimeAndEndTime(uint64_t aStartTime, uint64_t aEndTime) {
+    mStartAndEndTimeUs =
+        Some(std::pair<uint64_t, uint64_t>{aStartTime, aEndTime});
+  }
+  void AddMarker(MarkerOptions&& aOption) override;
 
   // The name of the source that performs this stage.
   nsCString mSource;
@@ -256,6 +283,7 @@ class DecodeStage {
   Maybe<gfx::ColorRange> mColorRange;
   Maybe<gfx::ColorDepth> mColorDepth;
   mutable Maybe<nsCString> mName;
+  Maybe<std::pair<uint64_t, uint64_t>> mStartAndEndTimeUs;
 };
 
 class PerformanceRecorderBase {
@@ -325,9 +353,7 @@ class PerformanceRecorderImpl : public PerformanceRecorderBase {
       MOZ_ASSERT(elapsedTimeUs >= 0, "Elapsed time can't be less than 0!");
       aStageMutator(stage);
       AUTO_PROFILER_STATS(PROFILER_MARKER_UNTYPED);
-      profiler_add_marker(
-          stage.Name(), stage.Category(),
-          MarkerOptions(MarkerTiming::Interval(startTime, now)));
+      stage.AddMarker(MarkerOptions(MarkerTiming::Interval(startTime, now)));
     }
     return static_cast<float>(elapsedTimeUs);
   }
diff --git a/dom/media/utils/TelemetryProbesReporter.cpp b/dom/media/utils/TelemetryProbesReporter.cpp
index 377cee9abc..e702ae14c5 100644
--- a/dom/media/utils/TelemetryProbesReporter.cpp
+++ b/dom/media/utils/TelemetryProbesReporter.cpp
@@ -7,6 +7,7 @@
 #include <cmath>
 
 #include "FrameStatistics.h"
+#include "MediaCodecsSupport.h"
 #include "VideoUtils.h"
 #include "mozilla/EMEUtils.h"
 #include "mozilla/Logging.h"
@@ -791,5 +792,32 @@ double TelemetryProbesReporter::GetAudiblePlayTimeInSeconds() const {
   return GetTotalAudioPlayTimeInSeconds() - GetInaudiblePlayTimeInSeconds();
 }
 
+/*  static */
+void TelemetryProbesReporter::ReportDeviceMediaCodecSupported(
+    const media::MediaCodecsSupported& aSupported) {
+  static bool sReported = false;
+  if (sReported) {
+    return;
+  }
+  MOZ_ASSERT(ContainHardwareCodecsSupported(aSupported));
+  sReported = true;
+
+  glean::media_playback::device_hardware_decoder_support.Get("h264"_ns).Set(
+      aSupported.contains(
+          mozilla::media::MediaCodecsSupport::H264HardwareDecode));
+  glean::media_playback::device_hardware_decoder_support.Get("vp8"_ns).Set(
+      aSupported.contains(
+          mozilla::media::MediaCodecsSupport::VP8HardwareDecode));
+  glean::media_playback::device_hardware_decoder_support.Get("vp9"_ns).Set(
+      aSupported.contains(
+          mozilla::media::MediaCodecsSupport::VP9HardwareDecode));
+  glean::media_playback::device_hardware_decoder_support.Get("av1"_ns).Set(
+      aSupported.contains(
+          mozilla::media::MediaCodecsSupport::AV1HardwareDecode));
+  glean::media_playback::device_hardware_decoder_support.Get("hevc"_ns).Set(
+      aSupported.contains(
+          mozilla::media::MediaCodecsSupport::HEVCHardwareDecode));
+}
+
 #undef LOG
 }  // namespace mozilla
diff --git a/dom/media/utils/TelemetryProbesReporter.h b/dom/media/utils/TelemetryProbesReporter.h
index 43e05dcadd..2f0e7f1b44 100644
--- a/dom/media/utils/TelemetryProbesReporter.h
+++ b/dom/media/utils/TelemetryProbesReporter.h
@@ -5,6 +5,7 @@
 #ifndef DOM_TelemetryProbesReporter_H_
 #define DOM_TelemetryProbesReporter_H_
 
+#include "MediaCodecsSupport.h"
 #include "MediaInfo.h"
 #include "mozilla/Maybe.h"
 #include "mozilla/AwakeTimeStamp.h"
@@ -56,6 +57,9 @@ class TelemetryProbesReporter final {
 
   using AudibleState = dom::AudioChannelService::AudibleState;
 
+  static void ReportDeviceMediaCodecSupported(
+      const media::MediaCodecsSupported& aSupported);
+
   // State transitions
   void OnPlay(Visibility aVisibility, MediaContent aContent, bool aIsMuted);
   void OnPause(Visibility aVisibility);
diff --git a/dom/media/webaudio/FFTBlock.cpp b/dom/media/webaudio/FFTBlock.cpp
index 79fb934a00..eeeaf1061e 100644
--- a/dom/media/webaudio/FFTBlock.cpp
+++ b/dom/media/webaudio/FFTBlock.cpp
@@ -51,7 +51,8 @@ FFTBlock* FFTBlock::CreateInterpolatedBlock(const FFTBlock& block0,
                                             const FFTBlock& block1,
                                             double interp) {
   uint32_t fftSize = block0.FFTSize();
-  FFTBlock* newBlock = new FFTBlock(fftSize, 1.0f / AssertedCast<float>(fftSize));
+  FFTBlock* newBlock =
+      new FFTBlock(fftSize, 1.0f / AssertedCast<float>(fftSize));
 
   newBlock->InterpolateFrequencyComponents(block0, block1, interp);
 
diff --git a/dom/media/webcodecs/DecoderAgent.cpp b/dom/media/webcodecs/DecoderAgent.cpp
index 095852c01d..f7a539fa18 100644
--- a/dom/media/webcodecs/DecoderAgent.cpp
+++ b/dom/media/webcodecs/DecoderAgent.cpp
@@ -96,16 +96,18 @@ RefPtr<DecoderAgent::ConfigurePromise> DecoderAgent::Configure(
   auto params = CreateDecoderParams{
       *mInfo,
       CreateDecoderParams::OptionSet(
-          CreateDecoderParams::Option::LowLatency,
           aPreferSoftwareDecoder
               ? CreateDecoderParams::Option::HardwareDecoderNotAllowed
               : CreateDecoderParams::Option::Default),
       mInfo->GetType(), mImageContainer, knowsCompositor};
+  if (aLowLatency) {
+    params.mOptions += CreateDecoderParams::Option::LowLatency;
+  }
 
   LOG("DecoderAgent #%d (%p) is creating a decoder - PreferSW: %s, "
-      "low-latency: %syes",
+      "low-latency: %s",
       mId, this, aPreferSoftwareDecoder ? "yes" : "no",
-      aLowLatency ? "" : "forcibly ");
+      aLowLatency ? "yes" : "no");
 
   RefPtr<ConfigurePromise> p = mConfigurePromise.Ensure(__func__);
 
diff --git a/dom/media/webcodecs/DecoderTemplate.cpp b/dom/media/webcodecs/DecoderTemplate.cpp
index 2fc2471a24..896f83b352 100644
--- a/dom/media/webcodecs/DecoderTemplate.cpp
+++ b/dom/media/webcodecs/DecoderTemplate.cpp
@@ -85,28 +85,26 @@ DecoderTemplate<DecoderType>::ConfigureMessage::Create(
 
 template <typename DecoderType>
 DecoderTemplate<DecoderType>::DecodeMessage::DecodeMessage(
-    Id aId, ConfigId aConfigId, UniquePtr<InputTypeInternal>&& aData)
+    SeqId aSeqId, ConfigId aConfigId, UniquePtr<InputTypeInternal>&& aData)
     : ControlMessage(
-          nsPrintfCString("decode #%zu (config #%d)", aId, aConfigId)),
-      mId(aId),
+          nsPrintfCString("decode #%zu (config #%d)", aSeqId, aConfigId)),
+      mSeqId(aSeqId),
       mData(std::move(aData)) {}
 
-template <typename DecoderType>
-DecoderTemplate<DecoderType>::FlushMessage::FlushMessage(Id aId,
-                                                         ConfigId aConfigId,
-                                                         Promise* aPromise)
-    : ControlMessage(
-          nsPrintfCString("flush #%zu (config #%d)", aId, aConfigId)),
-      mId(aId),
-      mPromise(aPromise) {}
+static int64_t GenerateUniqueId() {
+  // This needs to be atomic since this can run on the main thread or worker
+  // thread.
+  static std::atomic<int64_t> sNextId = 0;
+  return ++sNextId;
+}
 
 template <typename DecoderType>
-void DecoderTemplate<DecoderType>::FlushMessage::RejectPromiseIfAny(
-    const nsresult& aReason) {
-  if (mPromise) {
-    mPromise->MaybeReject(aReason);
-  }
-}
+DecoderTemplate<DecoderType>::FlushMessage::FlushMessage(SeqId aSeqId,
+                                                         ConfigId aConfigId)
+    : ControlMessage(
+          nsPrintfCString("flush #%zu (config #%d)", aSeqId, aConfigId)),
+      mSeqId(aSeqId),
+      mUniqueId(GenerateUniqueId()) {}
 
 /*
  * Below are DecoderTemplate implementation
@@ -221,10 +219,16 @@ already_AddRefed<Promise> DecoderTemplate<DecoderType>::Flush(
 
   mKeyChunkRequired = true;
 
-  mControlMessageQueue.emplace(UniquePtr<ControlMessage>(
-      new FlushMessage(++mFlushCounter, mLatestConfigureId, p)));
-  LOG("%s %p enqueues %s", DecoderType::Name.get(), this,
-      mControlMessageQueue.back()->ToString().get());
+  auto msg = UniquePtr<ControlMessage>(
+      new FlushMessage(++mFlushCounter, mLatestConfigureId));
+  const auto flushPromiseId = msg->AsFlushMessage()->mUniqueId;
+  MOZ_ASSERT(!mPendingFlushPromises.Contains(flushPromiseId));
+  mPendingFlushPromises.Insert(flushPromiseId, p);
+
+  mControlMessageQueue.emplace(std::move(msg));
+
+  LOG("%s %p enqueues %s, with unique id %" PRId64, DecoderType::Name.get(),
+      this, mControlMessageQueue.back()->ToString().get(), flushPromiseId);
   ProcessControlMessageQueue();
   return p.forget();
 }
@@ -264,7 +268,7 @@ Result<Ok, nsresult> DecoderTemplate<DecoderType>::ResetInternal(
   mDecodeCounter = 0;
   mFlushCounter = 0;
 
-  CancelPendingControlMessages(aResult);
+  CancelPendingControlMessagesAndFlushPromises(aResult);
   DestroyDecoderAgentIfAny();
 
   if (mDecodeQueueSize > 0) {
@@ -390,7 +394,7 @@ void DecoderTemplate<DecoderType>::ProcessControlMessageQueue() {
 }
 
 template <typename DecoderType>
-void DecoderTemplate<DecoderType>::CancelPendingControlMessages(
+void DecoderTemplate<DecoderType>::CancelPendingControlMessagesAndFlushPromises(
     const nsresult& aResult) {
   AssertIsOnOwningThread();
 
@@ -399,11 +403,6 @@ void DecoderTemplate<DecoderType>::CancelPendingControlMessages(
     LOG("%s %p cancels current %s", DecoderType::Name.get(), this,
         mProcessingMessage->ToString().get());
     mProcessingMessage->Cancel();
-
-    if (FlushMessage* flush = mProcessingMessage->AsFlushMessage()) {
-      flush->RejectPromiseIfAny(aResult);
-    }
-
     mProcessingMessage.reset();
   }
 
@@ -411,14 +410,18 @@ void DecoderTemplate<DecoderType>::CancelPendingControlMessages(
   while (!mControlMessageQueue.empty()) {
     LOG("%s %p cancels pending %s", DecoderType::Name.get(), this,
         mControlMessageQueue.front()->ToString().get());
-
     MOZ_ASSERT(!mControlMessageQueue.front()->IsProcessing());
-    if (FlushMessage* flush = mControlMessageQueue.front()->AsFlushMessage()) {
-      flush->RejectPromiseIfAny(aResult);
-    }
-
     mControlMessageQueue.pop();
   }
+
+  // If there are pending flush promises, reject them.
+  mPendingFlushPromises.ForEach(
+      [&](const int64_t& id, const RefPtr<Promise>& p) {
+        LOG("%s %p, reject the promise for flush %" PRId64 " (unique id)",
+            DecoderType::Name.get(), this, id);
+        p->MaybeReject(aResult);
+      });
+  mPendingFlushPromises.Clear();
 }
 
 template <typename DecoderType>
@@ -565,7 +568,6 @@ MessageProcessedResult DecoderTemplate<DecoderType>::ProcessDecodeMessage(
     mProcessingMessage.reset();
     QueueATask("Error during decode",
                [self = RefPtr{this}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
-                 MOZ_ASSERT(self->mState != CodecState::Closed);
                  self->CloseInternal(NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
                });
     return MessageProcessedResult::Processed;
@@ -696,6 +698,8 @@ MessageProcessedResult DecoderTemplate<DecoderType>::ProcessFlushMessage(
 
             msg->Complete();
 
+            const auto flushPromiseId = msg->mUniqueId;
+
             // If flush failed, it means decoder fails to decode the data
             // sent before, so we treat it like decode error. We reject
             // the promise first and then queue a task to close
@@ -705,14 +709,15 @@ MessageProcessedResult DecoderTemplate<DecoderType>::ProcessFlushMessage(
               LOGE("%s %p, DecoderAgent #%d failed to flush: %s",
                    DecoderType::Name.get(), self.get(), id,
                    error.Description().get());
-              RefPtr<Promise> promise = msg->TakePromise();
               // Reject with an EncodingError instead of the error we got
               // above.
               self->QueueATask(
                   "Error during flush runnable",
-                  [self = RefPtr{this}, promise]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
-                    promise->MaybeReject(
-                        NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
+                  [self = RefPtr{this}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+                    // If Reset() was invoked before this task executes, the
+                    // promise in mPendingFlushPromises is handled there.
+                    // Otherwise, the promise is going to be rejected by
+                    // CloseInternal() below.
                     self->mProcessingMessage.reset();
                     MOZ_ASSERT(self->mState != CodecState::Closed);
                     self->CloseInternal(
@@ -733,14 +738,23 @@ MessageProcessedResult DecoderTemplate<DecoderType>::ProcessFlushMessage(
                   msgStr.get());
             }
 
-            RefPtr<Promise> promise = msg->TakePromise();
             self->QueueATask(
                 "Flush: output decoding data task",
-                [self = RefPtr{self}, promise, data = std::move(data)]()
-                    MOZ_CAN_RUN_SCRIPT_BOUNDARY {
-                      self->OutputDecodedData(std::move(data));
-                      promise->MaybeResolveWithUndefined();
-                    });
+                [self = RefPtr{self}, data = std::move(data),
+                 flushPromiseId]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+                  self->OutputDecodedData(std::move(data));
+                  // If Reset() was invoked before this task executes, or
+                  // during the output callback above in the execution of this
+                  // task, the promise in mPendingFlushPromises is handled
+                  // there. Otherwise, the promise is resolved here.
+                  if (Maybe<RefPtr<Promise>> p =
+                          self->mPendingFlushPromises.Take(flushPromiseId)) {
+                    LOG("%s %p, resolving the promise for flush %" PRId64
+                        " (unique id)",
+                        DecoderType::Name.get(), self.get(), flushPromiseId);
+                    p.value()->MaybeResolveWithUndefined();
+                  }
+                });
             self->mProcessingMessage.reset();
             self->ProcessControlMessageQueue();
           })
diff --git a/dom/media/webcodecs/DecoderTemplate.h b/dom/media/webcodecs/DecoderTemplate.h
index fe0cb5baee..69d4e2f03d 100644
--- a/dom/media/webcodecs/DecoderTemplate.h
+++ b/dom/media/webcodecs/DecoderTemplate.h
@@ -9,6 +9,8 @@
 
 #include <queue>
 
+#include "SimpleMap.h"
+#include "WebCodecsUtils.h"
 #include "mozilla/DOMEventTargetHelper.h"
 #include "mozilla/DecoderAgent.h"
 #include "mozilla/MozPromise.h"
@@ -18,7 +20,6 @@
 #include "mozilla/dom/WorkerRef.h"
 #include "mozilla/media/MediaUtils.h"
 #include "nsStringFwd.h"
-#include "WebCodecsUtils.h"
 
 namespace mozilla {
 
@@ -76,7 +77,8 @@ class DecoderTemplate : public DOMEventTargetHelper {
     const ConfigTypeInternal& Config() { return *mConfig; }
     UniquePtr<ConfigTypeInternal> TakeConfig() { return std::move(mConfig); }
 
-    const Id mId;  // A unique id shown in log.
+    // The id of a configure request.
+    const Id mId;
 
    private:
     ConfigureMessage(Id aId, UniquePtr<ConfigTypeInternal>&& aConfig);
@@ -88,16 +90,18 @@ class DecoderTemplate : public DOMEventTargetHelper {
       : public ControlMessage,
         public MessageRequestHolder<DecoderAgent::DecodePromise> {
    public:
-    using Id = size_t;
+    using SeqId = size_t;
     using ConfigId = typename Self::ConfigureMessage::Id;
-    DecodeMessage(Id aId, ConfigId aConfigId,
+    DecodeMessage(SeqId aSeqId, ConfigId aConfigId,
                   UniquePtr<InputTypeInternal>&& aData);
     ~DecodeMessage() = default;
     virtual void Cancel() override { Disconnect(); }
     virtual bool IsProcessing() override { return Exists(); };
     virtual DecodeMessage* AsDecodeMessage() override { return this; }
-    const Id mId;  // A unique id shown in log.
 
+    // The sequence id of a decode request associated with a specific
+    // configuration.
+    const SeqId mSeqId;
     UniquePtr<InputTypeInternal> mData;
   };
 
@@ -105,20 +109,18 @@ class DecoderTemplate : public DOMEventTargetHelper {
       : public ControlMessage,
         public MessageRequestHolder<DecoderAgent::DecodePromise> {
    public:
-    using Id = size_t;
+    using SeqId = size_t;
     using ConfigId = typename Self::ConfigureMessage::Id;
-    FlushMessage(Id aId, ConfigId aConfigId, Promise* aPromise);
+    FlushMessage(SeqId aSeqId, ConfigId aConfigId);
     ~FlushMessage() = default;
     virtual void Cancel() override { Disconnect(); }
     virtual bool IsProcessing() override { return Exists(); };
     virtual FlushMessage* AsFlushMessage() override { return this; }
-    already_AddRefed<Promise> TakePromise() { return mPromise.forget(); }
-    void RejectPromiseIfAny(const nsresult& aReason);
-
-    const Id mId;  // A unique id shown in log.
 
-   private:
-    RefPtr<Promise> mPromise;
+    // The sequence id of a flush request associated with a specific
+    // configuration.
+    const SeqId mSeqId;
+    const int64_t mUniqueId;
   };
 
  protected:
@@ -176,7 +178,7 @@ class DecoderTemplate : public DOMEventTargetHelper {
   nsresult FireEvent(nsAtom* aTypeWithOn, const nsAString& aEventType);
 
   void ProcessControlMessageQueue();
-  void CancelPendingControlMessages(const nsresult& aResult);
+  void CancelPendingControlMessagesAndFlushPromises(const nsresult& aResult);
 
   // Queue a task to the control thread. This is to be used when a task needs to
   // perform multiple steps.
@@ -209,6 +211,11 @@ class DecoderTemplate : public DOMEventTargetHelper {
   std::queue<UniquePtr<ControlMessage>> mControlMessageQueue;
   UniquePtr<ControlMessage> mProcessingMessage;
 
+  // When a flush request is initiated, a promise is created and stored in
+  // mPendingFlushPromises until it is settled in the task delivering the flush
+  // result or Reset() is called before the promise is settled.
+  SimpleMap<int64_t, RefPtr<Promise>> mPendingFlushPromises;
+
   uint32_t mDecodeQueueSize;
   bool mDequeueEventScheduled;
 
@@ -216,10 +223,10 @@ class DecoderTemplate : public DOMEventTargetHelper {
   // DecoderAgent's Id.
   uint32_t mLatestConfigureId;
   // Tracking how many decode data has been enqueued and this number will be
-  // used as the DecodeMessage's Id.
+  // used as the DecodeMessage's sequence Id.
   size_t mDecodeCounter;
   // Tracking how many flush request has been enqueued and this number will be
-  // used as the FlushMessage's Id.
+  // used as the FlushMessage's sequence Id.
   size_t mFlushCounter;
 
   // DecoderAgent will be created every time "configure" is being processed, and
diff --git a/dom/media/webcodecs/EncoderTemplate.cpp b/dom/media/webcodecs/EncoderTemplate.cpp
index 34edfae822..2f70380519 100644
--- a/dom/media/webcodecs/EncoderTemplate.cpp
+++ b/dom/media/webcodecs/EncoderTemplate.cpp
@@ -71,16 +71,8 @@ EncoderTemplate<EncoderType>::EncodeMessage::EncodeMessage(
 
 template <typename EncoderType>
 EncoderTemplate<EncoderType>::FlushMessage::FlushMessage(
-    WebCodecsId aConfigureId, Promise* aPromise)
-    : ControlMessage(aConfigureId), mPromise(aPromise) {}
-
-template <typename EncoderType>
-void EncoderTemplate<EncoderType>::FlushMessage::RejectPromiseIfAny(
-    const nsresult& aReason) {
-  if (mPromise) {
-    mPromise->MaybeReject(aReason);
-  }
-}
+    WebCodecsId aConfigureId)
+    : ControlMessage(aConfigureId) {}
 
 /*
  * Below are EncoderTemplate implementation
@@ -215,7 +207,13 @@ already_AddRefed<Promise> EncoderTemplate<EncoderType>::Flush(
     return p.forget();
   }
 
-  mControlMessageQueue.push(MakeRefPtr<FlushMessage>(mLatestConfigureId, p));
+  auto msg = MakeRefPtr<FlushMessage>(mLatestConfigureId);
+  const auto flushPromiseId = static_cast<int64_t>(msg->mMessageId);
+  MOZ_ASSERT(!mPendingFlushPromises.Contains(flushPromiseId));
+  mPendingFlushPromises.Insert(flushPromiseId, p);
+
+  mControlMessageQueue.emplace(std::move(msg));
+
   LOG("%s %p enqueues %s", EncoderType::Name.get(), this,
       mControlMessageQueue.back()->ToString().get());
   ProcessControlMessageQueue();
@@ -259,7 +257,7 @@ Result<Ok, nsresult> EncoderTemplate<EncoderType>::ResetInternal(
   mEncodeCounter = 0;
   mFlushCounter = 0;
 
-  CancelPendingControlMessages(aResult);
+  CancelPendingControlMessagesAndFlushPromises(aResult);
   DestroyEncoderAgentIfAny();
 
   if (mEncodeQueueSize > 0) {
@@ -403,8 +401,8 @@ void EncoderTemplate<VideoEncoderTraits>::OutputEncodedVideoData(
 
       metadata.mDecoderConfig.Construct(std::move(decoderConfig));
       mOutputNewDecoderConfig = false;
-      LOGE("New config passed to output callback: %s",
-           decoderConfigInternal.ToString().get());
+      LOG("New config passed to output callback: %s",
+          decoderConfigInternal.ToString().get());
     }
 
     nsAutoCString metadataInfo;
@@ -462,7 +460,7 @@ void EncoderTemplate<AudioEncoderTraits>::OutputEncodedAudioData(
           this->EncoderConfigToDecoderConfig(GetParentObject(), data,
                                              *mActiveConfig);
 
-      // Convert VideoDecoderConfigInternal to VideoDecoderConfig
+      // Convert AudioDecoderConfigInternal to AudioDecoderConfig
       RootedDictionary<AudioDecoderConfig> decoderConfig(cx);
       decoderConfig.mCodec = decoderConfigInternal.mCodec;
       decoderConfig.mNumberOfChannels = decoderConfigInternal.mNumberOfChannels;
@@ -473,8 +471,8 @@ void EncoderTemplate<AudioEncoderTraits>::OutputEncodedAudioData(
 
       metadata.mDecoderConfig.Construct(std::move(decoderConfig));
       mOutputNewDecoderConfig = false;
-      LOGE("New config passed to output callback: %s",
-           decoderConfigInternal.ToString().get());
+      LOG("New config passed to output callback: %s",
+          decoderConfigInternal.ToString().get());
     }
 
     nsAutoCString metadataInfo;
@@ -578,7 +576,7 @@ void EncoderTemplate<EncoderType>::ProcessControlMessageQueue() {
 }
 
 template <typename EncoderType>
-void EncoderTemplate<EncoderType>::CancelPendingControlMessages(
+void EncoderTemplate<EncoderType>::CancelPendingControlMessagesAndFlushPromises(
     const nsresult& aResult) {
   AssertIsOnOwningThread();
 
@@ -587,11 +585,6 @@ void EncoderTemplate<EncoderType>::CancelPendingControlMessages(
     LOG("%s %p cancels current %s", EncoderType::Name.get(), this,
         mProcessingMessage->ToString().get());
     mProcessingMessage->Cancel();
-
-    if (RefPtr<FlushMessage> flush = mProcessingMessage->AsFlushMessage()) {
-      flush->RejectPromiseIfAny(aResult);
-    }
-
     mProcessingMessage = nullptr;
   }
 
@@ -601,13 +594,17 @@ void EncoderTemplate<EncoderType>::CancelPendingControlMessages(
         mControlMessageQueue.front()->ToString().get());
 
     MOZ_ASSERT(!mControlMessageQueue.front()->IsProcessing());
-    if (RefPtr<FlushMessage> flush =
-            mControlMessageQueue.front()->AsFlushMessage()) {
-      flush->RejectPromiseIfAny(aResult);
-    }
-
     mControlMessageQueue.pop();
   }
+
+  // If there are pending flush promises, reject them.
+  mPendingFlushPromises.ForEach(
+      [&](const int64_t& id, const RefPtr<Promise>& p) {
+        LOG("%s %p, reject the promise for flush %" PRId64,
+            EncoderType::Name.get(), this, id);
+        p->MaybeReject(aResult);
+      });
+  mPendingFlushPromises.Clear();
 }
 
 template <typename EncoderType>
@@ -1020,78 +1017,88 @@ MessageProcessedResult EncoderTemplate<EncoderType>::ProcessFlushMessage(
   }
 
   mAgent->Drain()
-      ->Then(
-          GetCurrentSerialEventTarget(), __func__,
-          [self = RefPtr{this}, id = mAgent->mId, aMessage,
-           this](EncoderAgent::EncodePromise::ResolveOrRejectValue&& aResult) {
-            MOZ_ASSERT(self->mProcessingMessage);
-            MOZ_ASSERT(self->mProcessingMessage->AsFlushMessage());
-            MOZ_ASSERT(self->mState == CodecState::Configured);
-            MOZ_ASSERT(self->mAgent);
-            MOZ_ASSERT(id == self->mAgent->mId);
-            MOZ_ASSERT(self->mActiveConfig);
+      ->Then(GetCurrentSerialEventTarget(), __func__,
+             [self = RefPtr{this}, id = mAgent->mId, aMessage, this](
+                 EncoderAgent::EncodePromise::ResolveOrRejectValue&& aResult) {
+               MOZ_ASSERT(self->mProcessingMessage);
+               MOZ_ASSERT(self->mProcessingMessage->AsFlushMessage());
+               MOZ_ASSERT(self->mState == CodecState::Configured);
+               MOZ_ASSERT(self->mAgent);
+               MOZ_ASSERT(id == self->mAgent->mId);
+               MOZ_ASSERT(self->mActiveConfig);
 
-            LOG("%s %p, EncoderAgent #%zu %s has been %s",
-                EncoderType::Name.get(), self.get(), id,
-                aMessage->ToString().get(),
-                aResult.IsResolve() ? "resolved" : "rejected");
+               LOG("%s %p, EncoderAgent #%zu %s has been %s",
+                   EncoderType::Name.get(), self.get(), id,
+                   aMessage->ToString().get(),
+                   aResult.IsResolve() ? "resolved" : "rejected");
 
-            nsCString msgStr = aMessage->ToString();
+               nsCString msgStr = aMessage->ToString();
 
-            aMessage->Complete();
+               aMessage->Complete();
 
-            // If flush failed, it means encoder fails to encode the data
-            // sent before, so we treat it like an encode error. We reject
-            // the promise first and then queue a task to close VideoEncoder
-            // with an EncodingError.
-            if (aResult.IsReject()) {
-              const MediaResult& error = aResult.RejectValue();
-              LOGE("%s %p, EncoderAgent #%zu failed to flush: %s",
-                   EncoderType::Name.get(), self.get(), id,
-                   error.Description().get());
-              RefPtr<Promise> promise = aMessage->TakePromise();
-              // Reject with an EncodingError instead of the error we got
-              // above.
-              self->QueueATask(
-                  "Error during flush runnable",
-                  [self = RefPtr{this}, promise]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
-                    promise->MaybeReject(
-                        NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
-                    self->mProcessingMessage = nullptr;
-                    MOZ_ASSERT(self->mState != CodecState::Closed);
-                    self->CloseInternal(
-                        NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
-                  });
-              return;
-            }
+               // If flush failed, it means encoder fails to encode the data
+               // sent before, so we treat it like an encode error. We reject
+               // the promise first and then queue a task to close VideoEncoder
+               // with an EncodingError.
+               if (aResult.IsReject()) {
+                 const MediaResult& error = aResult.RejectValue();
+                 LOGE("%s %p, EncoderAgent #%zu failed to flush: %s",
+                      EncoderType::Name.get(), self.get(), id,
+                      error.Description().get());
+                 // Reject with an EncodingError instead of the error we got
+                 // above.
+                 self->QueueATask(
+                     "Error during flush runnable",
+                     [self = RefPtr{this}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+                       // If Reset() was invoked before this task executes, the
+                       // promise in mPendingFlushPromises is handled there.
+                       // Otherwise, the promise is going to be rejected by
+                       // CloseInternal() below.
+                       self->mProcessingMessage = nullptr;
+                       MOZ_ASSERT(self->mState != CodecState::Closed);
+                       self->CloseInternal(
+                           NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
+                     });
+                 return;
+               }
 
-            // If flush succeeded, schedule to output encoded data first
-            // and then resolve the promise, then keep processing the
-            // control messages.
-            MOZ_ASSERT(aResult.IsResolve());
-            nsTArray<RefPtr<MediaRawData>> data =
-                std::move(aResult.ResolveValue());
-
-            if (data.IsEmpty()) {
-              LOG("%s %p gets no data for %s", EncoderType::Name.get(),
-                  self.get(), msgStr.get());
-            } else {
-              LOG("%s %p, schedule %zu encoded data output for %s",
-                  EncoderType::Name.get(), self.get(), data.Length(),
-                  msgStr.get());
-            }
+               // If flush succeeded, schedule to output encoded data first
+               // and then resolve the promise, then keep processing the
+               // control messages.
+               MOZ_ASSERT(aResult.IsResolve());
+               nsTArray<RefPtr<MediaRawData>> data =
+                   std::move(aResult.ResolveValue());
 
-            RefPtr<Promise> promise = aMessage->TakePromise();
-            self->QueueATask(
-                "Flush: output encoded data task",
-                [self = RefPtr{self}, promise, data = std::move(data)]()
-                    MOZ_CAN_RUN_SCRIPT_BOUNDARY {
-                      self->OutputEncodedData(std::move(data));
-                      promise->MaybeResolveWithUndefined();
-                    });
-            self->mProcessingMessage = nullptr;
-            self->ProcessControlMessageQueue();
-          })
+               if (data.IsEmpty()) {
+                 LOG("%s %p gets no data for %s", EncoderType::Name.get(),
+                     self.get(), msgStr.get());
+               } else {
+                 LOG("%s %p, schedule %zu encoded data output for %s",
+                     EncoderType::Name.get(), self.get(), data.Length(),
+                     msgStr.get());
+               }
+
+               const auto flushPromiseId =
+                   static_cast<int64_t>(aMessage->mMessageId);
+               self->QueueATask(
+                   "Flush: output encoded data task",
+                   [self = RefPtr{self}, data = std::move(data),
+                    flushPromiseId]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
+                     self->OutputEncodedData(std::move(data));
+                     // If Reset() was invoked before this task executes, or
+                     // during the output callback above in the execution of
+                     // this task, the promise in mPendingFlushPromises is
+                     // handled there. Otherwise, the promise is resolved here.
+                     if (Maybe<RefPtr<Promise>> p =
+                             self->mPendingFlushPromises.Take(flushPromiseId)) {
+                       LOG("%s %p, resolving the promise for flush %" PRId64,
+                           EncoderType::Name.get(), self.get(), flushPromiseId);
+                       p.value()->MaybeResolveWithUndefined();
+                     }
+                   });
+               self->mProcessingMessage = nullptr;
+               self->ProcessControlMessageQueue();
+             })
       ->Track(aMessage->Request());
 
   return MessageProcessedResult::Processed;
diff --git a/dom/media/webcodecs/EncoderTemplate.h b/dom/media/webcodecs/EncoderTemplate.h
index bc65edca46..ecadf68681 100644
--- a/dom/media/webcodecs/EncoderTemplate.h
+++ b/dom/media/webcodecs/EncoderTemplate.h
@@ -11,14 +11,15 @@
 
 #include "EncoderAgent.h"
 #include "MediaData.h"
+#include "SimpleMap.h"
 #include "WebCodecsUtils.h"
 #include "mozilla/DOMEventTargetHelper.h"
 #include "mozilla/MozPromise.h"
 #include "mozilla/RefPtr.h"
 #include "mozilla/Result.h"
 #include "mozilla/UniquePtr.h"
-#include "mozilla/dom/VideoEncoderBinding.h"
 #include "mozilla/dom/AudioEncoderBinding.h"
+#include "mozilla/dom/VideoEncoderBinding.h"
 #include "mozilla/dom/WorkerRef.h"
 #include "mozilla/media/MediaUtils.h"
 #include "nsStringFwd.h"
@@ -116,12 +117,10 @@ class EncoderTemplate : public DOMEventTargetHelper {
       : public ControlMessage,
         public MessageRequestHolder<EncoderAgent::EncodePromise> {
    public:
-    FlushMessage(WebCodecsId aConfigureId, Promise* aPromise);
+    explicit FlushMessage(WebCodecsId aConfigureId);
     virtual void Cancel() override { Disconnect(); }
     virtual bool IsProcessing() override { return Exists(); };
     virtual RefPtr<FlushMessage> AsFlushMessage() override { return this; }
-    already_AddRefed<Promise> TakePromise() { return mPromise.forget(); }
-    void RejectPromiseIfAny(const nsresult& aReason);
 
     nsCString ToString() const override {
       nsCString rv;
@@ -129,9 +128,6 @@ class EncoderTemplate : public DOMEventTargetHelper {
                       this->mMessageId);
       return rv;
     }
-
-   private:
-    RefPtr<Promise> mPromise;
   };
 
  protected:
@@ -207,7 +203,7 @@ class EncoderTemplate : public DOMEventTargetHelper {
                                       const nsresult& aResult);
 
   void ProcessControlMessageQueue();
-  void CancelPendingControlMessages(const nsresult& aResult);
+  void CancelPendingControlMessagesAndFlushPromises(const nsresult& aResult);
 
   template <typename Func>
   void QueueATask(const char* aName, Func&& aSteps);
@@ -236,6 +232,11 @@ class EncoderTemplate : public DOMEventTargetHelper {
   std::queue<RefPtr<ControlMessage>> mControlMessageQueue;
   RefPtr<ControlMessage> mProcessingMessage;
 
+  // When a flush request is initiated, a promise is created and stored in
+  // mPendingFlushPromises until it is settled in the task delivering the flush
+  // result or Reset() is called before the promise is settled.
+  SimpleMap<int64_t, RefPtr<Promise>> mPendingFlushPromises;
+
   uint32_t mEncodeQueueSize;
   bool mDequeueEventScheduled;
 
diff --git a/dom/media/webcodecs/VideoEncoder.cpp b/dom/media/webcodecs/VideoEncoder.cpp
index 5407e917b6..4ce74fa0cb 100644
--- a/dom/media/webcodecs/VideoEncoder.cpp
+++ b/dom/media/webcodecs/VideoEncoder.cpp
@@ -343,25 +343,16 @@ static bool CanEncode(const RefPtr<VideoEncoderConfigInternal>& aConfig) {
   if (!IsSupportedVideoCodec(parsedCodecString)) {
     return false;
   }
-
-  // TODO (bug 1872879, bug 1872880): Support this on Windows and Mac.
   if (aConfig->mScalabilityMode.isSome()) {
-    // We only support L1T2 and L1T3 ScalabilityMode in VP8 and VP9 encoders on
-    // Linux.
-    bool supported = IsOnLinux() && (IsVP8CodecString(parsedCodecString) ||
-                                     IsVP9CodecString(parsedCodecString))
-                         ? aConfig->mScalabilityMode->EqualsLiteral("L1T2") ||
-                               aConfig->mScalabilityMode->EqualsLiteral("L1T3")
-                         : false;
-
-    if (!supported) {
+    // Check if ScalabilityMode string is valid.
+    if (!aConfig->mScalabilityMode->EqualsLiteral("L1T2") &&
+        !aConfig->mScalabilityMode->EqualsLiteral("L1T3")) {
       LOGE("Scalability mode %s not supported for codec: %s",
            NS_ConvertUTF16toUTF8(aConfig->mScalabilityMode.value()).get(),
            NS_ConvertUTF16toUTF8(parsedCodecString).get());
       return false;
     }
   }
-
   return EncoderSupport::Supports(aConfig);
 }
 
diff --git a/dom/media/webcodecs/crashtests/1889831.html b/dom/media/webcodecs/crashtests/1889831.html
new file mode 100644
index 0000000000..e88a028d16
--- /dev/null
+++ b/dom/media/webcodecs/crashtests/1889831.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<script>
+document.addEventListener("DOMContentLoaded", async () => {
+  const decoder = new VideoDecoder({
+    'output': (e) => {},
+    'error': (e) => {},
+  });
+  decoder.configure({
+    codec: 'vp8',
+    codedWidth: 320,
+    codedHeight: 240,
+    visibleRect: {x: 0, y: 0, width: 320, height: 240},
+    displayWidth: 320,
+    displayHeight: 240,
+  });
+  decoder.decode(new EncodedVideoChunk(
+    {type: 'key', timestamp: 0, data: new ArrayBuffer(0)}));
+  decoder.decode(new EncodedVideoChunk(
+    {type: 'key', timestamp: 1, data: new ArrayBuffer(0)}));
+})
+</script>
diff --git a/dom/media/webcodecs/crashtests/crashtests.list b/dom/media/webcodecs/crashtests/crashtests.list
index 16fbd90ff5..9d9a453a42 100644
--- a/dom/media/webcodecs/crashtests/crashtests.list
+++ b/dom/media/webcodecs/crashtests/crashtests.list
@@ -3,4 +3,4 @@ skip-if(Android) pref(dom.media.webcodecs.enabled,true) load 1848460.html
 skip-if(Android) pref(dom.media.webcodecs.enabled,true) load 1849271.html
 skip-if(Android) pref(dom.media.webcodecs.enabled,true) load 1864475.html
 skip-if(Android) pref(dom.media.webcodecs.enabled,true) load 1881079.html
-
+skip-if(Android) pref(dom.media.webcodecs.enabled,true) load 1889831.html
diff --git a/dom/media/webrtc/MediaEnginePrefs.h b/dom/media/webrtc/MediaEnginePrefs.h
index de5daf0ad9..e3eff7eba5 100644
--- a/dom/media/webrtc/MediaEnginePrefs.h
+++ b/dom/media/webrtc/MediaEnginePrefs.h
@@ -28,6 +28,7 @@ class MediaEnginePrefs {
         mHeight(0),
         mFPS(0),
         mFreq(0),
+        mUsePlatformProcessing(false),
         mAecOn(false),
         mUseAecMobile(false),
         mAgcOn(false),
@@ -44,6 +45,7 @@ class MediaEnginePrefs {
   int32_t mHeight;
   int32_t mFPS;
   int32_t mFreq;  // for test tones (fake:true)
+  bool mUsePlatformProcessing;
   bool mAecOn;
   bool mUseAecMobile;
   bool mAgcOn;
diff --git a/dom/media/webrtc/MediaEngineWebRTCAudio.cpp b/dom/media/webrtc/MediaEngineWebRTCAudio.cpp
index 220dcf3bd8..c072717e00 100644
--- a/dom/media/webrtc/MediaEngineWebRTCAudio.cpp
+++ b/dom/media/webrtc/MediaEngineWebRTCAudio.cpp
@@ -148,7 +148,7 @@ nsresult MediaEngineWebRTCMicrophoneSource::Reconfigure(
 }
 
 AudioProcessing::Config AudioInputProcessing::ConfigForPrefs(
-    const MediaEnginePrefs& aPrefs) {
+    const MediaEnginePrefs& aPrefs) const {
   AudioProcessing::Config config;
 
   config.pipeline.multi_channel_render = true;
@@ -207,6 +207,19 @@ AudioProcessing::Config AudioInputProcessing::ConfigForPrefs(
 
   config.high_pass_filter.enabled = aPrefs.mHPFOn;
 
+  if (mPlatformProcessingSetParams &
+      CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION) {
+    config.echo_canceller.enabled = false;
+  }
+  if (mPlatformProcessingSetParams &
+      CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL) {
+    config.gain_controller1.enabled = config.gain_controller2.enabled = false;
+  }
+  if (mPlatformProcessingSetParams &
+      CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION) {
+    config.noise_suppression.enabled = false;
+  }
+
   return config;
 }
 
@@ -412,11 +425,45 @@ void AudioInputProcessing::Disconnect(MediaTrackGraph* aGraph) {
   aGraph->AssertOnGraphThread();
 }
 
+void AudioInputProcessing::NotifySetRequestedInputProcessingParamsResult(
+    MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+    const Result<cubeb_input_processing_params, int>& aResult) {
+  aGraph->AssertOnGraphThread();
+  if (aRequestedParams != RequestedInputProcessingParams(aGraph)) {
+    // This is a result from an old request, wait for a more recent one.
+    return;
+  }
+  if (aResult.isOk()) {
+    if (mPlatformProcessingSetParams == aResult.inspect()) {
+      // No change.
+      return;
+    }
+    mPlatformProcessingSetError = Nothing();
+    mPlatformProcessingSetParams = aResult.inspect();
+    LOG("AudioInputProcessing %p platform processing params are now %s.", this,
+        CubebUtils::ProcessingParamsToString(mPlatformProcessingSetParams)
+            .get());
+  } else {
+    mPlatformProcessingSetError = Some(aResult.inspectErr());
+    mPlatformProcessingSetParams = CUBEB_INPUT_PROCESSING_PARAM_NONE;
+    LOG("AudioInputProcessing %p platform processing params failed to apply. "
+        "Applying input processing config in libwebrtc.",
+        this);
+  }
+  ApplySettingsInternal(aGraph, mSettings);
+}
+
 bool AudioInputProcessing::IsPassThrough(MediaTrackGraph* aGraph) const {
   aGraph->AssertOnGraphThread();
   // The high-pass filter is not taken into account when activating the
   // pass through, since it's not controllable from content.
-  return !(mSettings.mAecOn || mSettings.mAgcOn || mSettings.mNoiseOn);
+  auto config = AppliedConfig(aGraph);
+  auto aec = [](const auto& config) { return config.echo_canceller.enabled; };
+  auto agc = [](const auto& config) {
+    return config.gain_controller1.enabled || config.gain_controller2.enabled;
+  };
+  auto ns = [](const auto& config) { return config.noise_suppression.enabled; };
+  return !(aec(config) || agc(config) || ns(config));
 }
 
 void AudioInputProcessing::PassThroughChanged(MediaTrackGraph* aGraph) {
@@ -438,7 +485,7 @@ void AudioInputProcessing::PassThroughChanged(MediaTrackGraph* aGraph) {
   }
 }
 
-uint32_t AudioInputProcessing::GetRequestedInputChannelCount() {
+uint32_t AudioInputProcessing::GetRequestedInputChannelCount() const {
   return mSettings.mChannels;
 }
 
@@ -668,6 +715,10 @@ void AudioInputProcessing::ProcessOutputData(AudioProcessingTrack* aTrack,
     return;
   }
 
+  if (aChunk.mDuration == 0) {
+    return;
+  }
+
   TrackRate sampleRate = aTrack->mSampleRate;
   uint32_t framesPerPacket = GetPacketSize(sampleRate);  // in frames
   // Downmix from aChannels to MAX_CHANNELS if needed.
@@ -868,6 +919,7 @@ void AudioInputProcessing::PacketizeAndProcess(AudioProcessingTrack* aTrack,
         !(mPacketCount % 50)) {
       AudioProcessingStats stats = mAudioProcessing->GetStatistics();
       char msg[1024];
+      msg[0] = '\0';
       size_t offset = 0;
 #define AddIfValue(format, member)                                       \
   if (stats.member.has_value()) {                                        \
@@ -962,14 +1014,61 @@ void AudioInputProcessing::DeviceChanged(MediaTrackGraph* aGraph) {
       aGraph, aGraph->CurrentDriver(), this);
 }
 
+cubeb_input_processing_params
+AudioInputProcessing::RequestedInputProcessingParams(
+    MediaTrackGraph* aGraph) const {
+  aGraph->AssertOnGraphThread();
+  if (!mPlatformProcessingEnabled) {
+    return CUBEB_INPUT_PROCESSING_PARAM_NONE;
+  }
+  if (mPlatformProcessingSetError) {
+    return CUBEB_INPUT_PROCESSING_PARAM_NONE;
+  }
+  cubeb_input_processing_params params = CUBEB_INPUT_PROCESSING_PARAM_NONE;
+  if (mSettings.mAecOn) {
+    params |= CUBEB_INPUT_PROCESSING_PARAM_ECHO_CANCELLATION;
+  }
+  if (mSettings.mAgcOn) {
+    params |= CUBEB_INPUT_PROCESSING_PARAM_AUTOMATIC_GAIN_CONTROL;
+  }
+  if (mSettings.mNoiseOn) {
+    params |= CUBEB_INPUT_PROCESSING_PARAM_NOISE_SUPPRESSION;
+  }
+  return params;
+}
+
 void AudioInputProcessing::ApplySettings(MediaTrackGraph* aGraph,
                                          CubebUtils::AudioDeviceID aDeviceID,
                                          const MediaEnginePrefs& aSettings) {
   TRACE("AudioInputProcessing::ApplySettings");
   aGraph->AssertOnGraphThread();
 
+  // CUBEB_ERROR_NOT_SUPPORTED means the backend does not support platform
+  // processing. In that case, leave the error in place so we don't request
+  // processing anew.
+  if (mPlatformProcessingSetError.valueOr(CUBEB_OK) !=
+      CUBEB_ERROR_NOT_SUPPORTED) {
+    mPlatformProcessingSetError = Nothing();
+  }
+
   // Read previous state from mSettings.
   uint32_t oldChannelCount = GetRequestedInputChannelCount();
+
+  ApplySettingsInternal(aGraph, aSettings);
+
+  if (oldChannelCount != GetRequestedInputChannelCount()) {
+    RequestedInputChannelCountChanged(aGraph, aDeviceID);
+  }
+}
+
+void AudioInputProcessing::ApplySettingsInternal(
+    MediaTrackGraph* aGraph, const MediaEnginePrefs& aSettings) {
+  TRACE("AudioInputProcessing::ApplySettingsInternal");
+  aGraph->AssertOnGraphThread();
+
+  mPlatformProcessingEnabled = aSettings.mUsePlatformProcessing;
+
+  // Read previous state from the applied config.
   bool wasPassThrough = IsPassThrough(aGraph);
 
   mSettings = aSettings;
@@ -977,14 +1076,20 @@ void AudioInputProcessing::ApplySettings(MediaTrackGraph* aGraph,
     mAudioProcessing->ApplyConfig(ConfigForPrefs(aSettings));
   }
 
-  if (oldChannelCount != GetRequestedInputChannelCount()) {
-    RequestedInputChannelCountChanged(aGraph, aDeviceID);
-  }
   if (wasPassThrough != IsPassThrough(aGraph)) {
     PassThroughChanged(aGraph);
   }
 }
 
+webrtc::AudioProcessing::Config AudioInputProcessing::AppliedConfig(
+    MediaTrackGraph* aGraph) const {
+  aGraph->AssertOnGraphThread();
+  if (mAudioProcessing) {
+    return mAudioProcessing->GetConfig();
+  }
+  return ConfigForPrefs(mSettings);
+}
+
 void AudioInputProcessing::End() {
   mEnded = true;
   mSegment.Clear();
@@ -1078,7 +1183,6 @@ void AudioInputProcessing::EnsureAudioProcessing(AudioProcessingTrack* aTrack) {
 void AudioInputProcessing::ResetAudioProcessing(MediaTrackGraph* aGraph) {
   aGraph->AssertOnGraphThread();
   MOZ_ASSERT(IsPassThrough(aGraph) || !mEnabled);
-  MOZ_ASSERT(mPacketizerInput);
 
   LOG_FRAME(
       "(Graph %p, Driver %p) AudioInputProcessing %p Resetting audio "
@@ -1091,9 +1195,10 @@ void AudioInputProcessing::ResetAudioProcessing(MediaTrackGraph* aGraph) {
     mAudioProcessing->Initialize();
   }
 
-  MOZ_ASSERT(static_cast<uint32_t>(mSegment.GetDuration()) +
-                 mPacketizerInput->FramesAvailable() ==
-             mPacketizerInput->mPacketSize);
+  MOZ_ASSERT_IF(mPacketizerInput,
+                static_cast<uint32_t>(mSegment.GetDuration()) +
+                        mPacketizerInput->FramesAvailable() ==
+                    mPacketizerInput->mPacketSize);
 
   // It's ok to clear all the internal buffer here since we won't use mSegment
   // in pass-through mode or when audio processing is disabled.
diff --git a/dom/media/webrtc/MediaEngineWebRTCAudio.h b/dom/media/webrtc/MediaEngineWebRTCAudio.h
index 6b1fbf0089..705d33fc38 100644
--- a/dom/media/webrtc/MediaEngineWebRTCAudio.h
+++ b/dom/media/webrtc/MediaEngineWebRTCAudio.h
@@ -117,7 +117,8 @@ class AudioInputProcessing : public AudioDataListener {
     // If we're passing data directly without AEC or any other process, this
     // means that all voice-processing has been disabled intentionaly. In this
     // case, consider that the device is not used for voice input.
-    return !IsPassThrough(aGraph);
+    return !IsPassThrough(aGraph) ||
+           mPlatformProcessingSetParams != CUBEB_INPUT_PROCESSING_PARAM_NONE;
   }
 
   void Start(MediaTrackGraph* aGraph);
@@ -125,18 +126,27 @@ class AudioInputProcessing : public AudioDataListener {
 
   void DeviceChanged(MediaTrackGraph* aGraph) override;
 
-  uint32_t RequestedInputChannelCount(MediaTrackGraph*) override {
+  uint32_t RequestedInputChannelCount(MediaTrackGraph*) const override {
     return GetRequestedInputChannelCount();
   }
 
+  cubeb_input_processing_params RequestedInputProcessingParams(
+      MediaTrackGraph* aGraph) const override;
+
   void Disconnect(MediaTrackGraph* aGraph) override;
 
+  void NotifySetRequestedInputProcessingParamsResult(
+      MediaTrackGraph* aGraph, cubeb_input_processing_params aRequestedParams,
+      const Result<cubeb_input_processing_params, int>& aResult) override;
+
   void PacketizeAndProcess(AudioProcessingTrack* aTrack,
                            const AudioSegment& aSegment);
 
-  uint32_t GetRequestedInputChannelCount();
+  uint32_t GetRequestedInputChannelCount() const;
+
   // This is true when all processing is disabled, in which case we can skip
-  // packetization, resampling and other processing passes.
+  // packetization, resampling and other processing passes. Processing may still
+  // be applied by the platform on the underlying input track.
   bool IsPassThrough(MediaTrackGraph* aGraph) const;
 
   // This allow changing the APM options, enabling or disabling processing
@@ -146,6 +156,9 @@ class AudioInputProcessing : public AudioDataListener {
                      CubebUtils::AudioDeviceID aDeviceID,
                      const MediaEnginePrefs& aSettings);
 
+  // The config currently applied to the audio processing module.
+  webrtc::AudioProcessing::Config AppliedConfig(MediaTrackGraph* aGraph) const;
+
   void End();
 
   TrackTime NumBufferedFrames(MediaTrackGraph* aGraph) const;
@@ -163,13 +176,15 @@ class AudioInputProcessing : public AudioDataListener {
  private:
   ~AudioInputProcessing() = default;
   webrtc::AudioProcessing::Config ConfigForPrefs(
-      const MediaEnginePrefs& aPrefs);
+      const MediaEnginePrefs& aPrefs) const;
   void PassThroughChanged(MediaTrackGraph* aGraph);
   void RequestedInputChannelCountChanged(MediaTrackGraph* aGraph,
                                          CubebUtils::AudioDeviceID aDeviceId);
   void EnsurePacketizer(AudioProcessingTrack* aTrack);
   void EnsureAudioProcessing(AudioProcessingTrack* aTrack);
   void ResetAudioProcessing(MediaTrackGraph* aGraph);
+  void ApplySettingsInternal(MediaTrackGraph* aGraph,
+                             const MediaEnginePrefs& aSettings);
   PrincipalHandle GetCheckedPrincipal(const AudioSegment& aSegment);
   // This implements the processing algoritm to apply to the input (e.g. a
   // microphone). If all algorithms are disabled, this class in not used. This
@@ -186,6 +201,17 @@ class AudioInputProcessing : public AudioDataListener {
   // The current settings from about:config preferences and content-provided
   // constraints.
   MediaEnginePrefs mSettings;
+  // When false, RequestedInputProcessingParams() returns no params, resulting
+  // in platform processing getting disabled in the platform.
+  bool mPlatformProcessingEnabled = false;
+  // The latest error notified to us through
+  // NotifySetRequestedInputProcessingParamsResult, or Nothing if the latest
+  // request was successful, or if a request is pending a result.
+  Maybe<int> mPlatformProcessingSetError;
+  // The processing params currently applied in the platform. This allows
+  // adapting the AudioProcessingConfig accordingly.
+  cubeb_input_processing_params mPlatformProcessingSetParams =
+      CUBEB_INPUT_PROCESSING_PARAM_NONE;
   // Buffer for up to one 10ms packet of planar mixed audio output for the
   // reverse-stream (speaker data) of mAudioProcessing AEC.
   // Length is packet size * channel count, regardless of how many frames are
diff --git a/dom/media/webrtc/jsapi/RTCTransformEventRunnable.cpp b/dom/media/webrtc/jsapi/RTCTransformEventRunnable.cpp
index 6f41baf80f..16e3c2fd28 100644
--- a/dom/media/webrtc/jsapi/RTCTransformEventRunnable.cpp
+++ b/dom/media/webrtc/jsapi/RTCTransformEventRunnable.cpp
@@ -57,8 +57,8 @@ already_AddRefed<Event> RTCTransformEventRunnable::BuildEvent(
   // Set transformer.[[writable]] to writable.
   RefPtr<RTCRtpScriptTransformer> transformer =
       new RTCRtpScriptTransformer(aGlobal);
-  nsresult nrv =
-      transformer->Init(aCx, aTransformerOptions, mWorkerPrivate, mProxy);
+  nsresult nrv = transformer->Init(aCx, aTransformerOptions,
+                                   GetCurrentThreadWorkerPrivate(), mProxy);
   if (NS_WARN_IF(NS_FAILED(nrv))) {
     // TODO: Error handling. Currently unspecified.
     return nullptr;
diff --git a/dom/media/webrtc/libwebrtcglue/VideoConduit.cpp b/dom/media/webrtc/libwebrtcglue/VideoConduit.cpp
index 5862237711..e863934ebc 100644
--- a/dom/media/webrtc/libwebrtcglue/VideoConduit.cpp
+++ b/dom/media/webrtc/libwebrtcglue/VideoConduit.cpp
@@ -750,8 +750,20 @@ void WebrtcVideoConduit::OnControlConfigChange() {
         // TODO this is for webrtc-priority, but needs plumbing bits
         mEncoderConfig.bitrate_priority = 1.0;
 
+        // Populate simulcast_layers with their config (not dimensions or
+        // dimensions-derived properties, as they're only known as a frame to
+        // be sent is known).
+        mEncoderConfig.simulcast_layers.clear();
+        for (size_t idx = 0; idx < streamCount; ++idx) {
+          webrtc::VideoStream video_stream;
+          auto& encoding = codecConfig->mEncodings[idx];
+          video_stream.active = encoding.active;
+          mEncoderConfig.simulcast_layers.push_back(video_stream);
+        }
+
         // Expected max number of encodings
-        mEncoderConfig.number_of_streams = streamCount;
+        mEncoderConfig.number_of_streams =
+            mEncoderConfig.simulcast_layers.size();
 
         // libwebrtc disables this by default.
         mSendStreamConfig.suspend_below_min_bitrate = false;
diff --git a/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp b/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
index 0ead26a453..d3047f4fca 100644
--- a/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
+++ b/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
@@ -150,6 +150,7 @@ std::vector<webrtc::VideoStream> VideoStreamFactory::CreateEncoderStreams(
           : aConfig.number_of_streams;
 
   MOZ_RELEASE_ASSERT(streamCount >= 1, "Should request at least one stream");
+  MOZ_RELEASE_ASSERT(streamCount <= aConfig.simulcast_layers.size());
 
   std::vector<webrtc::VideoStream> streams;
   streams.reserve(streamCount);
@@ -160,10 +161,10 @@ std::vector<webrtc::VideoStream> VideoStreamFactory::CreateEncoderStreams(
   }
 
   for (size_t idx = 0; idx < streamCount; ++idx) {
-    webrtc::VideoStream video_stream;
+    webrtc::VideoStream video_stream = aConfig.simulcast_layers[idx];
     auto& encoding = mCodecConfig.mEncodings[idx];
-    video_stream.active = encoding.active;
     MOZ_ASSERT(encoding.constraints.scaleDownBy >= 1.0);
+    MOZ_ASSERT(video_stream.active == encoding.active);
 
     gfx::IntSize newSize(0, 0);
 
diff --git a/dom/media/webrtc/metrics.yaml b/dom/media/webrtc/metrics.yaml
index aea5cf17fb..dfa8c120f1 100644
--- a/dom/media/webrtc/metrics.yaml
+++ b/dom/media/webrtc/metrics.yaml
@@ -404,3 +404,84 @@ codec.stats:
     notification_emails:
       - webrtc-telemetry-alerts@mozilla.com
     expires: 132
+
+webrtcdtls:
+  protocol_version:
+    type: labeled_counter
+    description: >
+      The version of DTLS used for each webrtc connection. Can be 1.0, 1.2, or 1.3 (there is no 1.1 version of DTLS)
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - webrtc-telemetry-alerts@mozilla.com
+    expires: 135
+
+  cipher:
+    type: labeled_counter
+    description: >
+      The CipherSuite used for each webrtc DTLS connection, as a string
+      representation of the CipherSuite's ID in 4 hex digits (eg;
+      TLS_DHE_RSA_WITH_AES_128_CBC_SHA would be "0x0033")
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - webrtc-telemetry-alerts@mozilla.com
+    expires: 135
+
+  srtp_cipher:
+    type: labeled_counter
+    description: >
+      The SRTPProtectionProfile (see RFC 5764) used for each webrtc SRTP
+      connection, as a string representation of the SRTPProtectionProfile's ID
+      in 4 hex digits (eg; SRTP_AES128_CM_HMAC_SHA1_80 would be "0x0001")
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - webrtc-telemetry-alerts@mozilla.com
+    expires: 135
+
+  client_handshake_result:
+    type: labeled_counter
+    description: >
+      The result of each webrtc client DTLS handshake as a string containing
+      either the name of the error code (eg; SSL_ERROR_BAD_CERTIFICATE),
+      SUCCESS for successful handshakes, ALPN_FAILURE when ALPN negotiation
+      fails, or CERT_FAILURE when cert validation fails.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - webrtc-telemetry-alerts@mozilla.com
+    expires: 135
+
+  server_handshake_result:
+    type: labeled_counter
+    description: >
+      The result of each webrtc server DTLS handshake, as the name of the error
+      code (eg; SSL_ERROR_BAD_CERTIFICATE), the empty string for successful
+      handshakes, ALPN_FAILURE when ALPN negotiation fails, or CERT_FAILURE when
+      cert validation fails.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1884140
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - webrtc-telemetry-alerts@mozilla.com
+    expires: 135
diff --git a/dom/media/webrtc/sdp/rsdparsa_capi/src/lib.rs b/dom/media/webrtc/sdp/rsdparsa_capi/src/lib.rs
index 20a13900a2..1286a5d338 100644
--- a/dom/media/webrtc/sdp/rsdparsa_capi/src/lib.rs
+++ b/dom/media/webrtc/sdp/rsdparsa_capi/src/lib.rs
@@ -99,7 +99,7 @@ pub unsafe extern "C" fn sdp_free_session(sdp_ptr: *mut SdpSession) {
 pub unsafe extern "C" fn sdp_new_reference(session: *mut SdpSession) -> *const SdpSession {
     let original = Rc::from_raw(session);
     let ret = Rc::into_raw(Rc::clone(&original));
-    Rc::into_raw(original); // So the original reference doesn't get dropped
+    std::mem::forget(original); // So the original reference doesn't get dropped
     ret
 }
 
diff --git a/dom/media/webrtc/sdp/rsdparsa_capi/src/types.rs b/dom/media/webrtc/sdp/rsdparsa_capi/src/types.rs
index 2522c8333d..7b85a173fb 100644
--- a/dom/media/webrtc/sdp/rsdparsa_capi/src/types.rs
+++ b/dom/media/webrtc/sdp/rsdparsa_capi/src/types.rs
@@ -3,7 +3,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use libc::size_t;
-use std::boxed::Box;
 use std::convert::TryInto;
 use std::error::Error;
 use std::ffi::CStr;
diff --git a/dom/media/webrtc/tests/mochitests/head.js b/dom/media/webrtc/tests/mochitests/head.js
index 1fd559217a..cc0992b469 100644
--- a/dom/media/webrtc/tests/mochitests/head.js
+++ b/dom/media/webrtc/tests/mochitests/head.js
@@ -413,7 +413,7 @@ function setupEnvironment() {
       // If either fake audio or video is desired we enable fake streams.
       // If loopback devices are set they will be chosen instead of fakes in gecko.
       ["media.navigator.streams.fake", WANT_FAKE_AUDIO || WANT_FAKE_VIDEO],
-      ["media.getusermedia.audiocapture.enabled", true],
+      ["media.getusermedia.audio.capture.enabled", true],
       ["media.getusermedia.screensharing.enabled", true],
       ["media.getusermedia.window.focus_source.enabled", false],
       ["media.recorder.audio_node.enabled", true],
diff --git a/dom/media/webrtc/tests/mochitests/iceTestUtils.js b/dom/media/webrtc/tests/mochitests/iceTestUtils.js
index 9e76e3f7df..23237f563b 100644
--- a/dom/media/webrtc/tests/mochitests/iceTestUtils.js
+++ b/dom/media/webrtc/tests/mochitests/iceTestUtils.js
@@ -75,6 +75,18 @@ async function iceConnected(pc) {
   });
 }
 
+async function dtlsConnected(pc) {
+  return new Promise((resolve, reject) => {
+    pc.addEventListener("connectionstatechange", () => {
+      if (["connected", "completed"].includes(pc.connectionState)) {
+        resolve();
+      } else if (pc.connectionState == "failed") {
+        reject(new Error(`Connection failed`));
+      }
+    });
+  });
+}
+
 // Set up trickle, but does not wait for it to complete. Can be used by itself
 // in cases where we do not expect any new candidates, but want to still set up
 // the signal handling in case new candidates _do_ show up.
@@ -87,7 +99,8 @@ async function connect(
   answerer,
   timeout,
   context,
-  noTrickleWait = false
+  noTrickleWait = false,
+  waitForDtls = false
 ) {
   const trickle1 = trickleIce(offerer, answerer);
   const trickle2 = trickleIce(answerer, offerer);
@@ -110,8 +123,12 @@ async function connect(
       }
     };
 
+    const connectionPromises = waitForDtls
+      ? [dtlsConnected(offerer), dtlsConnected(answerer)]
+      : [iceConnected(offerer), iceConnected(answerer)];
+
     await Promise.race([
-      Promise.all([iceConnected(offerer), iceConnected(answerer)]),
+      Promise.all(connectionPromises),
       throwOnTimeout(timeout, context),
     ]);
   } finally {
diff --git a/dom/media/webrtc/tests/mochitests/test_peerConnection_glean.html b/dom/media/webrtc/tests/mochitests/test_peerConnection_glean.html
index 1faf464566..a382949823 100644
--- a/dom/media/webrtc/tests/mochitests/test_peerConnection_glean.html
+++ b/dom/media/webrtc/tests/mochitests/test_peerConnection_glean.html
@@ -4,6 +4,7 @@
 <head>
   <script type="application/javascript" src="pc.js"></script>
   <script type="application/javascript" src="sdpUtils.js"></script>
+  <script type="application/javascript" src="iceTestUtils.js"></script>
 </head>
 
 <body>
@@ -580,6 +581,187 @@
       ok(preferredVideoCodec == 6, "checkLoggingMultipleTransceivers glean should show preferred video codec VP8 " + preferredVideoCodec);
     },
 
+    async function checkDtlsHandshakeSuccess() {
+      const pc1 = new RTCPeerConnection();
+      const pc2 = new RTCPeerConnection();
+      await gleanResetTestValues();
+      let client_successes = await GleanTest.webrtcdtls.clientHandshakeResult.SUCCESS.testGetValue() || 0;
+      let server_successes = await GleanTest.webrtcdtls.serverHandshakeResult.SUCCESS.testGetValue() || 0;
+      let cipher_count = await GleanTest.webrtcdtls.cipher["0x1301"].testGetValue() || 0;
+      let srtp_cipher_count = await GleanTest.webrtcdtls.srtpCipher["0x0007"].testGetValue() || 0;
+      is(client_successes, 0);
+      is(server_successes, 0);
+      is(cipher_count, 0);
+      is(srtp_cipher_count, 0);
+
+      const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+      pc1.addTrack(stream.getTracks()[0]);
+
+      await connect(pc1, pc2, 32000, "DTLS connected", true, true);
+
+      client_successes = await GleanTest.webrtcdtls.clientHandshakeResult.SUCCESS.testGetValue() || 0;
+      server_successes = await GleanTest.webrtcdtls.serverHandshakeResult.SUCCESS.testGetValue() || 0;
+      cipher_count = await GleanTest.webrtcdtls.cipher["0x1301"].testGetValue() || 0;
+      srtp_cipher_count = await GleanTest.webrtcdtls.srtpCipher["0x0007"].testGetValue() || 0;
+      is(client_successes, 1);
+      is(server_successes, 1);
+      is(cipher_count, 2);
+      is(srtp_cipher_count, 2);
+    },
+
+    async function checkDtlsCipherPrefs() {
+      await withPrefs([["security.tls13.aes_128_gcm_sha256", false],
+                       ["security.tls13.aes_256_gcm_sha384", false],
+                       ["security.tls13.chacha20_poly1305_sha256", true]],
+        async () => {
+          const pc1 = new RTCPeerConnection();
+          const pc2 = new RTCPeerConnection();
+          await gleanResetTestValues();
+          let cipher_count = await GleanTest.webrtcdtls.cipher["0x1303"].testGetValue() || 0;
+          is(cipher_count, 0);
+
+          const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+          pc1.addTrack(stream.getTracks()[0]);
+
+          await connect(pc1, pc2, 32000, "DTLS connected", true, true);
+
+          cipher_count = await GleanTest.webrtcdtls.cipher["0x1303"].testGetValue() || 0;
+          is(cipher_count, 2);
+      });
+    },
+
+    async function checkDtlsHandshakeFailure() {
+      // We don't have many failures we can induce here, but messing up the
+      // fingerprint is one way.
+      const offerer = new RTCPeerConnection();
+      const answerer = new RTCPeerConnection();
+      await gleanResetTestValues();
+      let client_failures = await GleanTest.webrtcdtls.clientHandshakeResult.SSL_ERROR_BAD_CERTIFICATE.testGetValue() || 0;
+      let server_failures = await GleanTest.webrtcdtls.serverHandshakeResult.SSL_ERROR_BAD_CERT_ALERT.testGetValue() || 0;
+      is(client_failures, 0);
+      is(server_failures, 0);
+
+      const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+      offerer.addTrack(stream.getTracks()[0]);
+
+      trickleIce(offerer, answerer);
+      trickleIce(answerer, offerer);
+      await offerer.setLocalDescription();
+      let badSdp = offerer.localDescription.sdp;
+      // Tweak the last digit in the fingerprint sent to the answerer. Answerer
+      // (which will be the DTLS client) will get an SSL_ERROR_BAD_CERTIFICATE
+      // error, and the offerer (which will be the DTLS server) will get an
+      // SSL_ERROR_BAD_CERT_ALERT.
+      const lastDigit = badSdp.match(/a=fingerprint:.*([0-9A-F])$/m)[1];
+      const newLastDigit = lastDigit == '0' ? '1' : '0';
+      badSdp = badSdp.replace(/(a=fingerprint:.*)[0-9A-F]$/m, "$1" + newLastDigit);
+      info(badSdp);
+      await answerer.setRemoteDescription({sdp: badSdp, type: "offer"});
+      await answerer.setLocalDescription();
+      await offerer.setRemoteDescription(answerer.localDescription);
+
+      const throwOnTimeout = async () => {
+        await wait(32000);
+        throw new Error(
+          `ICE did not complete within ${timeout} ms`);
+      };
+
+      const connectionPromises = [connectionStateReached(offerer, "failed"),
+                                  connectionStateReached(answerer, "failed")];
+
+      await Promise.race([
+        Promise.all(connectionPromises),
+        throwOnTimeout()
+      ]);
+
+      client_failures = await GleanTest.webrtcdtls.clientHandshakeResult.SSL_ERROR_BAD_CERTIFICATE.testGetValue() || 0;
+      server_failures = await GleanTest.webrtcdtls.serverHandshakeResult.SSL_ERROR_BAD_CERT_ALERT.testGetValue() || 0;
+      is(client_failures, 1);
+      is(server_failures, 1);
+    },
+
+    async function checkDtlsVersion1_3() {
+      // 1.3 should be the default
+      const pc1 = new RTCPeerConnection();
+      const pc2 = new RTCPeerConnection();
+      await gleanResetTestValues();
+      let count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+      let count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+      let count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+      is(count1_0, 0);
+      is(count1_2, 0);
+      is(count1_3, 0);
+
+      const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+      pc1.addTrack(stream.getTracks()[0]);
+
+      await connect(pc1, pc2, 32000, "DTLS connected", true, true);
+
+      count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+      count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+      count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+      is(count1_0, 0);
+      is(count1_2, 0);
+      is(count1_3, 2);
+    },
+
+    async function checkDtlsVersion1_2() {
+      // Make 1.2 the default
+      await withPrefs([["media.peerconnection.dtls.version.max", 771]],
+        async () => {
+          const pc1 = new RTCPeerConnection();
+          const pc2 = new RTCPeerConnection();
+          await gleanResetTestValues();
+          let count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+          let count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+          let count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+          is(count1_0, 0);
+          is(count1_2, 0);
+          is(count1_3, 0);
+
+          const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+          pc1.addTrack(stream.getTracks()[0]);
+
+          await connect(pc1, pc2, 32000, "DTLS connected", true, true);
+
+          count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+          count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+          count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+          is(count1_0, 0);
+          is(count1_2, 2);
+          is(count1_3, 0);
+      });
+    },
+
+    async function checkDtlsVersion1_0() {
+      // Make 1.0 the default
+      await withPrefs([["media.peerconnection.dtls.version.max", 770],
+                       ["media.peerconnection.dtls.version.min", 770]],
+        async () => {
+          const pc1 = new RTCPeerConnection();
+          const pc2 = new RTCPeerConnection();
+          await gleanResetTestValues();
+          let count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+          let count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+          let count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+          is(count1_0, 0);
+          is(count1_2, 0);
+          is(count1_3, 0);
+
+          const stream = await navigator.mediaDevices.getUserMedia({ video: true });
+          pc1.addTrack(stream.getTracks()[0]);
+
+          await connect(pc1, pc2, 32000, "DTLS connected", true, true);
+
+          count1_0 = await GleanTest.webrtcdtls.protocolVersion["1.0"].testGetValue() || 0;
+          count1_2 = await GleanTest.webrtcdtls.protocolVersion["1.2"].testGetValue() || 0;
+          count1_3 = await GleanTest.webrtcdtls.protocolVersion["1.3"].testGetValue() || 0;
+          is(count1_0, 2);
+          is(count1_2, 0);
+          is(count1_3, 0);
+      });
+    },
+
   ];
 
   runNetworkTest(async () => {
diff --git a/dom/media/webrtc/third_party_build/default_config_env b/dom/media/webrtc/third_party_build/default_config_env
index be3c5ba7c1..0fef4d3192 100644
--- a/dom/media/webrtc/third_party_build/default_config_env
+++ b/dom/media/webrtc/third_party_build/default_config_env
@@ -5,41 +5,41 @@
 export MOZ_LIBWEBRTC_SRC=$STATE_DIR/moz-libwebrtc
 
 # The previous fast-forward bug number is used for some error messaging.
-export MOZ_PRIOR_FASTFORWARD_BUG="1876843"
+export MOZ_PRIOR_FASTFORWARD_BUG="1883116"
 
 # Fast-forwarding each Chromium version of libwebrtc should be done
 # under a separate bugzilla bug.  This bug number is used when crafting
 # the commit summary as each upstream commit is vendored into the
 # mercurial repository.  The bug used for the v106 fast-forward was
 # 1800920.
-export MOZ_FASTFORWARD_BUG="1883116"
+export MOZ_FASTFORWARD_BUG="1888181"
 
 # MOZ_NEXT_LIBWEBRTC_MILESTONE and MOZ_NEXT_FIREFOX_REL_TARGET are
 # not used during fast-forward processing, but facilitate generating this
 # default config.  To generate an default config for the next update, run
 # bash dom/media/webrtc/third_party_build/update_default_config_env.sh
-export MOZ_NEXT_LIBWEBRTC_MILESTONE=122
-export MOZ_NEXT_FIREFOX_REL_TARGET=126
+export MOZ_NEXT_LIBWEBRTC_MILESTONE=123
+export MOZ_NEXT_FIREFOX_REL_TARGET=127
 
 # For Chromium release branches, see:
 # https://chromiumdash.appspot.com/branches
 
-# Chromium's v121 release branch was 6167.  This is used to pre-stack
+# Chromium's v122 release branch was 6261.  This is used to pre-stack
 # the previous release branch's commits onto the appropriate base commit
 # (the first common commit between trunk and the release branch).
-export MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM="6167"
+export MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM="6261"
 
-# New target release branch for v122 is branch-heads/6261.  This is used
+# New target release branch for v123 is branch-heads/6312.  This is used
 # to calculate the next upstream commit.
-export MOZ_TARGET_UPSTREAM_BRANCH_HEAD="branch-heads/6261"
+export MOZ_TARGET_UPSTREAM_BRANCH_HEAD="branch-heads/6312"
 
 # For local development 'mozpatches' is fine for a branch name, but when
 # pushing the patch stack to github, it should be named something like
-# 'moz-mods-chr122-for-rel126'.
+# 'moz-mods-chr123-for-rel127'.
 export MOZ_LIBWEBRTC_BRANCH="mozpatches"
 
 # After elm has been merged to mozilla-central, the patch stack in
 # moz-libwebrtc should be pushed to github.  The script
 # push_official_branch.sh uses this branch name when pushing to the
 # public repo.
-export MOZ_LIBWEBRTC_OFFICIAL_BRANCH="moz-mods-chr122-for-rel126"
+export MOZ_LIBWEBRTC_OFFICIAL_BRANCH="moz-mods-chr123-for-rel127"
diff --git a/dom/media/webrtc/third_party_build/elm_rebase.sh b/dom/media/webrtc/third_party_build/elm_rebase.sh
index 0dbf93d3ce..734fcacc40 100644
--- a/dom/media/webrtc/third_party_build/elm_rebase.sh
+++ b/dom/media/webrtc/third_party_build/elm_rebase.sh
@@ -54,15 +54,32 @@ be as simple as running the following commands:
 COMMIT_LIST_FILE=$TMP_DIR/rebase-commit-list.txt
 export HGPLAIN=1
 
+if [ "x$MOZ_TOP_FF" = "x" ]; then
+  MOZ_TOP_FF=""
+fi
+if [ "x$MOZ_BOTTOM_FF" = "x" ]; then
+  MOZ_BOTTOM_FF=""
+fi
+if [ "x$STOP_FOR_REORDER" = "x" ]; then
+  STOP_FOR_REORDER=""
+fi
+
 # After this point:
 # * eE: All commands should succeed.
+# * u: All variables should be defined before use.
 # * o pipefail: All stages of all pipes should succeed.
-set -eEo pipefail
+set -eEuo pipefail
 
 if [ -f $STATE_DIR/rebase_resume_state ]; then
   source $STATE_DIR/rebase_resume_state
 else
 
+  # on first run, we want to verify sanity of the patch-stack so
+  # ending guidance is appropriate regarding changes in
+  # third_party/libwebrtc between the old central we're currently
+  # based on and the new central we're rebasing onto.
+  bash dom/media/webrtc/third_party_build/verify_vendoring.sh
+
   if [ "x" == "x$MOZ_TOP_FF" ]; then
     MOZ_TOP_FF=`hg log -r . -T"{node|short}"`
 
@@ -119,12 +136,6 @@ That command looks like:
   fi
   ERROR_HELP=""
 
-  # After this point:
-  # * eE: All commands should succeed.
-  # * u: All variables should be defined before use.
-  # * o pipefail: All stages of all pipes should succeed.
-  set -eEuo pipefail
-
   MOZ_NEW_CENTRAL=`hg log -r central -T"{node|short}"`
 
   echo "bottom of fast-foward tree is $MOZ_BOTTOM_FF"
diff --git a/dom/media/webrtc/third_party_build/fetch_github_repo.py b/dom/media/webrtc/third_party_build/fetch_github_repo.py
index 8caa55d5c5..1031eb528b 100644
--- a/dom/media/webrtc/third_party_build/fetch_github_repo.py
+++ b/dom/media/webrtc/third_party_build/fetch_github_repo.py
@@ -67,12 +67,16 @@ def fetch_repo(github_path, clone_protocol, force_fetch, tar_path):
             "git remote add upstream https://webrtc.googlesource.com/src", github_path
         )
         run_git("git fetch upstream", github_path)
-        run_git("git merge upstream/master", github_path)
     else:
         print(
             "Upstream remote (https://webrtc.googlesource.com/src) already configured"
         )
 
+    # for sanity, ensure we're on master
+    run_git("git checkout master", github_path)
+    # make sure we successfully fetched upstream
+    run_git("git merge upstream/master", github_path)
+
     # setup upstream branch-heads
     stdout_lines = run_git(
         "git config --local --get-all remote.upstream.fetch", github_path
@@ -87,9 +91,12 @@ def fetch_repo(github_path, clone_protocol, force_fetch, tar_path):
     else:
         print("Upstream remote branch-heads already configured")
 
+    # verify that a (quite old) branch-head exists
+    run_git("git show branch-heads/5059", github_path)
+
     # prevent changing line endings when moving things out of the git repo
     # (and into hg for instance)
-    run_git("git config --local core.autocrlf false")
+    run_git("git config --local core.autocrlf false", github_path)
 
     # do a sanity fetch in case this was not a freshly cloned copy of the
     # repo, meaning it may not have all the mozilla branches present.
diff --git a/dom/media/webrtc/third_party_build/loop-ff.sh b/dom/media/webrtc/third_party_build/loop-ff.sh
index 73ad22822c..9836a8e687 100644
--- a/dom/media/webrtc/third_party_build/loop-ff.sh
+++ b/dom/media/webrtc/third_party_build/loop-ff.sh
@@ -99,9 +99,9 @@ To verify vendoring, run:
 
 When verify_vendoring.sh is successful, please run the following command
 in bash:
-    (source $SCRIPT_DIR/use_config_env.sh ;
-     ./mach python $SCRIPT_DIR/save_patch_stack.py \
-      --repo-path $MOZ_LIBWEBRTC_SRC \
+    (source $SCRIPT_DIR/use_config_env.sh ; \\
+     ./mach python $SCRIPT_DIR/save_patch_stack.py \\
+      --repo-path $MOZ_LIBWEBRTC_SRC \\
       --target-branch-head $MOZ_TARGET_UPSTREAM_BRANCH_HEAD )
 
 You may resume running this script with the following command:
diff --git a/dom/media/webrtc/third_party_build/prep_repo.sh b/dom/media/webrtc/third_party_build/prep_repo.sh
index 8cd9ff6816..b1a04748b7 100644
--- a/dom/media/webrtc/third_party_build/prep_repo.sh
+++ b/dom/media/webrtc/third_party_build/prep_repo.sh
@@ -13,9 +13,30 @@ trap 'show_error_msg $LINENO' ERR
 source dom/media/webrtc/third_party_build/use_config_env.sh
 export HGPLAIN=1
 
+if [ "x$ALLOW_RERUN" = "x" ]; then
+  ALLOW_RERUN="0"
+fi
+
 echo "MOZ_LIBWEBRTC_SRC: $MOZ_LIBWEBRTC_SRC"
 echo "MOZ_LIBWEBRTC_BRANCH: $MOZ_LIBWEBRTC_BRANCH"
 echo "MOZ_FASTFORWARD_BUG: $MOZ_FASTFORWARD_BUG"
+echo "ALLOW_RERUN: $ALLOW_RERUN"
+
+ERROR_HELP=$"
+A copy of moz-libwebrtc already exists at $MOZ_LIBWEBRTC_SRC
+While this script is not technically idempotent, it will try.
+However, the safest way forward is to start fresh by running:
+    rm -rf $STATE_DIR && \\
+    bash $0
+
+If you are sure you want to reuse the existing directory, run:
+    ALLOW_RERUN=1 bash $0
+"
+if [ -d $MOZ_LIBWEBRTC_SRC ] && [ "x$ALLOW_RERUN" != "x1" ]; then
+  echo "$ERROR_HELP"
+  exit 1
+fi
+ERROR_HELP=""
 
 # After this point:
 # * eE: All commands should succeed.
@@ -66,8 +87,25 @@ rm -f *.patch
 
 # create a new work branch and "export" a new patch stack to rebase
 # find the common commit between our upstream release branch and trunk
-CHERRY_PICK_BASE=`git merge-base branch-heads/$MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM master`
-echo "common commit: $CHERRY_PICK_BASE"
+PREVIOUS_RELEASE_BRANCH_BASE=`git merge-base branch-heads/$MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM master`
+echo "PREVIOUS_RELEASE_BRANCH_BASE: $PREVIOUS_RELEASE_BRANCH_BASE"
+
+NEXT_RELEASE_BRANCH_BASE=`git merge-base $MOZ_TARGET_UPSTREAM_BRANCH_HEAD master`
+echo "NEXT_RELEASE_BRANCH_BASE: $NEXT_RELEASE_BRANCH_BASE"
+
+ERROR_HELP=$"
+The previous release branch base ($PREVIOUS_RELEASE_BRANCH_BASE)
+and the next release branch base ($NEXT_RELEASE_BRANCH_BASE) are the
+same and should not be.  This indicates a problem in the git repo at
+$MOZ_LIBWEBRTC_SRC.
+At the least it likely means that 'master' is older than the two
+release branches.  Investigation is necessary.
+"
+if [ "x$PREVIOUS_RELEASE_BRANCH_BASE" == "x$NEXT_RELEASE_BRANCH_BASE" ]; then
+  echo "$ERROR_HELP"
+  exit 1
+fi
+ERROR_HELP=""
 
 # find the last upstream commit used by the previous update, so we don't
 # accidentally grab release branch commits that were added after we started
@@ -85,9 +123,9 @@ commands will allow the process to continue:
     git checkout $MOZ_LIBWEBRTC_BRANCH && \\
     git checkout -b $MOZ_LIBWEBRTC_BRANCH-old && \\
     git branch -D $MOZ_LIBWEBRTC_BRANCH ) && \\
-  bash $0
+  ALLOW_RERUN=1 bash $0
 "
-git branch $MOZ_LIBWEBRTC_BRANCH $CHERRY_PICK_BASE
+git branch $MOZ_LIBWEBRTC_BRANCH $PREVIOUS_RELEASE_BRANCH_BASE
 ERROR_HELP=""
 git checkout $MOZ_LIBWEBRTC_BRANCH
 
@@ -95,7 +133,7 @@ git checkout $MOZ_LIBWEBRTC_BRANCH
 rm -f $TMP_DIR/*.patch $TMP_DIR/*.patch.bak
 
 # grab the patches for all the commits in chrome's release branch for libwebrtc
-git format-patch -o $TMP_DIR -k $CHERRY_PICK_BASE..$LAST_UPSTREAM_COMMIT_SHA
+git format-patch -o $TMP_DIR -k $PREVIOUS_RELEASE_BRANCH_BASE..$LAST_UPSTREAM_COMMIT_SHA
 # tweak the release branch commit summaries to show they were cherry picked
 sed -i.bak -e "/^Subject: / s/^Subject: /Subject: (cherry-pick-branch-heads\/$MOZ_PRIOR_UPSTREAM_BRANCH_HEAD_NUM) /" $TMP_DIR/*.patch
 git am $TMP_DIR/*.patch # applies to branch mozpatches
diff --git a/dom/media/webrtc/third_party_build/verify_vendoring.sh b/dom/media/webrtc/third_party_build/verify_vendoring.sh
index 008ab0d5db..6152e6d003 100644
--- a/dom/media/webrtc/third_party_build/verify_vendoring.sh
+++ b/dom/media/webrtc/third_party_build/verify_vendoring.sh
@@ -13,6 +13,12 @@ trap 'show_error_msg $LINENO' ERR
 source dom/media/webrtc/third_party_build/use_config_env.sh
 export HGPLAIN=1
 
+# After this point:
+# * eE: All commands should succeed.
+# * u: All variables should be defined before use.
+# * o pipefail: All stages of all pipes should succeed.
+set -eEuo pipefail
+
 echo "MOZ_LIBWEBRTC_SRC: $MOZ_LIBWEBRTC_SRC"
 echo "MOZ_LIBWEBRTC_BRANCH: $MOZ_LIBWEBRTC_BRANCH"
 echo "MOZ_FASTFORWARD_BUG: $MOZ_FASTFORWARD_BUG"
@@ -30,27 +36,18 @@ LAST_PATCHSTACK_UPDATE_COMMIT_SHA=`echo $LAST_PATCHSTACK_UPDATE_COMMIT \
 echo "LAST_PATCHSTACK_UPDATE_COMMIT_SHA: $LAST_PATCHSTACK_UPDATE_COMMIT_SHA"
 
 # grab the oldest, non "Vendor from libwebrtc" line
-OLDEST_CANDIDATE_COMMIT=`hg log --template "{node|short} {desc|firstline}\n" \
-    -r $LAST_PATCHSTACK_UPDATE_COMMIT_SHA::. \
-    | grep -v "Vendor libwebrtc from" | head -1`
-echo "OLDEST_CANDIDATE_COMMIT: $OLDEST_CANDIDATE_COMMIT"
-
-OLDEST_CANDIDATE_SHA=`echo $OLDEST_CANDIDATE_COMMIT \
-    | awk '{ print $1; }'`
-echo "OLDEST_CANDIDATE_SHA: $OLDEST_CANDIDATE_SHA"
+CANDIDATE_COMMITS=`hg log --template "{node|short} {desc|firstline}\n" \
+    -r "children($LAST_PATCHSTACK_UPDATE_COMMIT_SHA)::. - desc('re:(Vendor libwebrtc)')" \
+    --include "third_party/libwebrtc/" | awk 'BEGIN { ORS=" " }; { print $1; }'`
+echo "CANDIDATE_COMMITS:"
+echo "$CANDIDATE_COMMITS"
 
 EXTRACT_COMMIT_RANGE="{start-commit-sha}::."
-if [ "x$CURRENT_SHA" != "x$OLDEST_CANDIDATE_SHA" ]; then
-  EXTRACT_COMMIT_RANGE="$OLDEST_CANDIDATE_SHA::."
+if [ "x$CANDIDATE_COMMITS" != "x" ]; then
+  EXTRACT_COMMIT_RANGE="$CANDIDATE_COMMITS"
   echo "EXTRACT_COMMIT_RANGE: $EXTRACT_COMMIT_RANGE"
 fi
 
-# After this point:
-# * eE: All commands should succeed.
-# * u: All variables should be defined before use.
-# * o pipefail: All stages of all pipes should succeed.
-set -eEuo pipefail
-
 ./mach python $SCRIPT_DIR/vendor-libwebrtc.py \
         --from-local $MOZ_LIBWEBRTC_SRC \
         --commit $MOZ_LIBWEBRTC_BRANCH \
diff --git a/dom/media/webrtc/transport/test/moz.build b/dom/media/webrtc/transport/test/moz.build
index a2b0bc2bc2..3213525abd 100644
--- a/dom/media/webrtc/transport/test/moz.build
+++ b/dom/media/webrtc/transport/test/moz.build
@@ -7,35 +7,39 @@
 include("/ipc/chromium/chromium-config.mozbuild")
 
 if CONFIG["OS_TARGET"] != "WINNT":
-    if CONFIG["OS_TARGET"] != "Android":
-        SOURCES += [
-            "ice_unittest.cpp",
-        ]
-
     SOURCES += [
         "buffered_stun_socket_unittest.cpp",
         "multi_tcp_socket_unittest.cpp",
-        "nrappkit_unittest.cpp",
         "proxy_tunnel_socket_unittest.cpp",
-        "rlogconnector_unittest.cpp",
         "runnable_utils_unittest.cpp",
         "simpletokenbucket_unittest.cpp",
-        "sockettransportservice_unittest.cpp",
         "stunserver.cpp",
         "test_nr_socket_ice_unittest.cpp",
         "test_nr_socket_unittest.cpp",
         "TestSyncRunnable.cpp",
-        "transport_unittests.cpp",
         "turn_unittest.cpp",
-        "webrtcproxychannel_unittest.cpp",
     ]
 
-    if CONFIG["MOZ_SCTP"]:
+    # Bug 1894419 - Various failures under TSAN
+    if not CONFIG["MOZ_TSAN"]:
+        if CONFIG["OS_TARGET"] != "Android":
+            SOURCES += [
+                "ice_unittest.cpp",
+            ]
+
+        if CONFIG["MOZ_SCTP"]:
+            SOURCES += [
+                "sctp_unittest.cpp",
+            ]
+
         SOURCES += [
-            "sctp_unittest.cpp",
+            "nrappkit_unittest.cpp",
+            "rlogconnector_unittest.cpp",
+            "sockettransportservice_unittest.cpp",
+            "transport_unittests.cpp",
+            "webrtcproxychannel_unittest.cpp",
         ]
 
-
 for var in ("HAVE_STRDUP", "NR_SOCKET_IS_VOID_PTR", "SCTP_DEBUG"):
     DEFINES[var] = True
 
diff --git a/dom/media/webrtc/transport/test_nr_socket.cpp b/dom/media/webrtc/transport/test_nr_socket.cpp
index 1a6f226c42..1bf95adc88 100644
--- a/dom/media/webrtc/transport/test_nr_socket.cpp
+++ b/dom/media/webrtc/transport/test_nr_socket.cpp
@@ -141,8 +141,7 @@ TestNat::NatBehavior TestNat::ToNatBehavior(const std::string& type) {
     return TestNat::PORT_DEPENDENT;
   }
 
-  MOZ_ASSERT(false, "Invalid NAT behavior");
-  return TestNat::ENDPOINT_INDEPENDENT;
+  MOZ_CRASH("Invalid NAT behavior");
 }
 
 bool TestNat::has_port_mappings() const {
@@ -202,8 +201,8 @@ TestNrSocket::~TestNrSocket() { nat_->erase_socket(this); }
 
 RefPtr<NrSocketBase> TestNrSocket::create_external_socket(
     const nr_transport_addr& dest_addr) const {
-  MOZ_ASSERT(nat_->enabled_);
-  MOZ_ASSERT(!nat_->is_an_internal_tuple(dest_addr));
+  MOZ_RELEASE_ASSERT(nat_->enabled_);
+  MOZ_RELEASE_ASSERT(!nat_->is_an_internal_tuple(dest_addr));
 
   int r;
   nr_transport_addr nat_external_addr;
@@ -261,7 +260,7 @@ void TestNrSocket::close() {
 }
 
 int TestNrSocket::listen(int backlog) {
-  MOZ_ASSERT(internal_socket_->my_addr().protocol == IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(internal_socket_->my_addr().protocol == IPPROTO_TCP);
   r_log(LOG_GENERIC, LOG_DEBUG, "TestNrSocket %p %s listening", this,
         internal_socket_->my_addr().as_string);
 
@@ -269,7 +268,7 @@ int TestNrSocket::listen(int backlog) {
 }
 
 int TestNrSocket::accept(nr_transport_addr* addrp, nr_socket** sockp) {
-  MOZ_ASSERT(internal_socket_->my_addr().protocol == IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(internal_socket_->my_addr().protocol == IPPROTO_TCP);
   int r = internal_socket_->accept(addrp, sockp);
   if (r) {
     return r;
@@ -296,7 +295,7 @@ void TestNrSocket::process_delayed_cb(NR_SOCKET s, int how, void* cb_arg) {
 
 int TestNrSocket::sendto(const void* msg, size_t len, int flags,
                          const nr_transport_addr* to) {
-  MOZ_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
   r_log(LOG_GENERIC, LOG_DEBUG, "TestNrSocket %p %s %s", this, __FUNCTION__,
         to->as_string);
 
@@ -347,10 +346,7 @@ int TestNrSocket::sendto(const void* msg, size_t len, int flags,
       external_socket = similar_port_mapping->external_socket_;
     } else {
       external_socket = create_external_socket(*to);
-      if (!external_socket) {
-        MOZ_ASSERT(false);
-        return R_INTERNAL;
-      }
+      MOZ_RELEASE_ASSERT(external_socket);
     }
 
     port_mapping = create_port_mapping(*to, external_socket);
@@ -371,7 +367,7 @@ int TestNrSocket::sendto(const void* msg, size_t len, int flags,
 
 int TestNrSocket::recvfrom(void* buf, size_t maxlen, size_t* len, int flags,
                            nr_transport_addr* from) {
-  MOZ_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
 
   if (!read_buffer_.empty()) {
     UdpPacket& packet = read_buffer_.front();
@@ -441,8 +437,8 @@ bool TestNrSocket::allow_ingress(const nr_transport_addr& to,
                                  const nr_transport_addr& from,
                                  PortMapping** port_mapping_used) const {
   // This is only called for traffic arriving at a port mapping
-  MOZ_ASSERT(nat_->enabled_);
-  MOZ_ASSERT(!nat_->is_an_internal_tuple(from));
+  MOZ_RELEASE_ASSERT(nat_->enabled_);
+  MOZ_RELEASE_ASSERT(!nat_->is_an_internal_tuple(from));
 
   // Find the port mapping (if any) that this packet landed on
   *port_mapping_used = nullptr;
@@ -603,7 +599,7 @@ int TestNrSocket::write(const void* msg, size_t len, size_t* written) {
     return R_INTERNAL;
   }
   // This is TCP only
-  MOZ_ASSERT(port_mappings_.size() == 1);
+  MOZ_RELEASE_ASSERT(port_mappings_.size() == 1);
   r_log(LOG_GENERIC, LOG_DEBUG, "PortMapping %s -> %s writing",
         port_mappings_.front()->external_socket_->my_addr().as_string,
         port_mappings_.front()->remote_address_.as_string);
@@ -641,7 +637,7 @@ int TestNrSocket::read(void* buf, size_t maxlen, size_t* len) {
   if (port_mappings_.empty()) {
     r = internal_socket_->read(buf, maxlen, len);
   } else {
-    MOZ_ASSERT(port_mappings_.size() == 1);
+    MOZ_RELEASE_ASSERT(port_mappings_.size() == 1);
     r = port_mappings_.front()->external_socket_->read(buf, maxlen, len);
     if (!r && nat_->refresh_on_ingress_) {
       port_mappings_.front()->last_used_ = PR_IntervalNow();
@@ -722,7 +718,7 @@ int TestNrSocket::async_wait(int how, NR_async_cb cb, void* cb_arg,
   if (internal_socket_->my_addr().protocol == IPPROTO_TCP) {
     // For a TCP connection through a simulated NAT, these signals are
     // just passed through.
-    MOZ_ASSERT(port_mappings_.size() == 1);
+    MOZ_RELEASE_ASSERT(port_mappings_.size() == 1);
 
     return port_mappings_.front()->async_wait(
         how, port_mapping_tcp_passthrough_callback, this, function, line);
@@ -834,7 +830,7 @@ void TestNrSocket::on_socket_readable(NrSocketBase* real_socket) {
 }
 
 void TestNrSocket::fire_readable_callback() {
-  MOZ_ASSERT(poll_flags() & PR_POLL_READ);
+  MOZ_RELEASE_ASSERT(poll_flags() & PR_POLL_READ);
   r_log(LOG_GENERIC, LOG_DEBUG, "TestNrSocket %p %s ready for read", this,
         internal_socket_->my_addr().as_string);
   fire_callback(NR_ASYNC_WAIT_READ);
@@ -849,7 +845,7 @@ void TestNrSocket::port_mapping_writeable_callback(void* ext_sock_v, int how,
 }
 
 void TestNrSocket::write_to_port_mapping(NrSocketBase* external_socket) {
-  MOZ_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(internal_socket_->my_addr().protocol != IPPROTO_TCP);
 
   int r = 0;
   for (PortMapping* port_mapping : port_mappings_) {
@@ -935,7 +931,7 @@ TestNrSocket::PortMapping::PortMapping(
 }
 
 int TestNrSocket::PortMapping::send_from_queue() {
-  MOZ_ASSERT(remote_address_.protocol != IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(remote_address_.protocol != IPPROTO_TCP);
   int r = 0;
 
   while (!send_queue_.empty()) {
@@ -967,7 +963,7 @@ int TestNrSocket::PortMapping::send_from_queue() {
 
 int TestNrSocket::PortMapping::sendto(const void* msg, size_t len,
                                       const nr_transport_addr& to) {
-  MOZ_ASSERT(remote_address_.protocol != IPPROTO_TCP);
+  MOZ_RELEASE_ASSERT(remote_address_.protocol != IPPROTO_TCP);
   r_log(LOG_GENERIC, LOG_DEBUG, "PortMapping %s -> %s sending to %s",
         external_socket_->my_addr().as_string, remote_address_.as_string,
         to.as_string);
diff --git a/dom/media/webrtc/transport/third_party/nICEr/src/stun/addrs.c b/dom/media/webrtc/transport/third_party/nICEr/src/stun/addrs.c
index 362b7d828e..51f72f4179 100644
--- a/dom/media/webrtc/transport/third_party/nICEr/src/stun/addrs.c
+++ b/dom/media/webrtc/transport/third_party/nICEr/src/stun/addrs.c
@@ -62,82 +62,125 @@ nr_stun_is_duplicate_addr(nr_local_addr addrs[], int count, nr_local_addr *addr)
     return 0;
 }
 
+static int
+nr_stun_filter_find_first_addr_with_ifname(nr_local_addr addrs[], int count, const char *ifname) {
+  for (int i = 0; i < count; ++i) {
+    if (!strncmp(addrs[i].addr.ifname, ifname, sizeof(addrs[i].addr.ifname))) {
+      return i;
+    }
+  }
+  return count;
+}
+
+static int
+nr_stun_filter_addrs_for_ifname(nr_local_addr src[], const int src_begin, const int src_end, nr_local_addr dest[], int *dest_index, int remove_loopback, int remove_link_local) {
+  int r, _status;
+  /* We prefer temp ipv6 for their privacy properties. If we cannot get
+   * that, we prefer ipv6 that are not based on mac address. */
+  int filter_mac_ipv6 = 0;
+  int filter_teredo_ipv6 = 0;
+  int filter_non_temp_ipv6 = 0;
+
+  const char* ifname = src[src_begin].addr.ifname;
+
+  /* Figure out what we want to filter */
+  for (int i = src_begin; i < src_end; ++i) {
+    if (strncmp(ifname, src[i].addr.ifname, sizeof(src[i].addr.ifname))) {
+      /* Ignore addrs from other interfaces */
+      continue;
+    }
+
+    if (src[i].addr.ip_version == NR_IPV6) {
+      if (nr_transport_addr_is_teredo(&src[i].addr)) {
+          src[i].interface.type |= NR_INTERFACE_TYPE_TEREDO;
+          /* Prefer teredo over mac-based address. Probably will never see
+           * both. */
+          filter_mac_ipv6 = 1;
+      } else {
+        filter_teredo_ipv6 = 1;
+      }
+
+      if (!nr_transport_addr_is_mac_based(&src[i].addr)) {
+        filter_mac_ipv6 = 1;
+      }
+
+      if (src[i].flags & NR_ADDR_FLAG_TEMPORARY) {
+        filter_non_temp_ipv6 = 1;
+      }
+    }
+  }
+
+  /* Perform the filtering */
+  for (int i = src_begin; i < src_end; ++i) {
+    if (strncmp(ifname, src[i].addr.ifname, sizeof(src[i].addr.ifname))) {
+      /* Ignore addrs from other interfaces */
+      continue;
+    }
+
+    if (nr_stun_is_duplicate_addr(dest, *dest_index, &src[i])) {
+        /* skip src[i], it's a duplicate */
+    }
+    else if (remove_loopback && nr_transport_addr_is_loopback(&src[i].addr)) {
+        /* skip src[i], it's a loopback */
+    }
+    else if (remove_link_local &&
+             nr_transport_addr_is_link_local(&src[i].addr)) {
+        /* skip src[i], it's a link-local address */
+    }
+    else if (filter_mac_ipv6 &&
+             nr_transport_addr_is_mac_based(&src[i].addr)) {
+        /* skip src[i], it's MAC based */
+    }
+    else if (filter_teredo_ipv6 &&
+             nr_transport_addr_is_teredo(&src[i].addr)) {
+        /* skip src[i], it's a Teredo address */
+    }
+    else if (filter_non_temp_ipv6 &&
+             (src[i].addr.ip_version == NR_IPV6) &&
+             !(src[i].flags & NR_ADDR_FLAG_TEMPORARY)) {
+        /* skip src[i], it's a non-temporary ipv6, and we have a temporary */
+    }
+    else {
+        /* otherwise, copy it to the destination array */
+        if ((r=nr_local_addr_copy(&dest[*dest_index], &src[i])))
+            ABORT(r);
+        ++(*dest_index);
+    }
+  }
+
+  _status = 0;
+abort:
+  return _status;
+}
+
 int
 nr_stun_filter_addrs(nr_local_addr addrs[], int remove_loopback, int remove_link_local, int *count)
 {
     int r, _status;
     nr_local_addr *tmp = 0;
-    int i;
-    int n;
-    /* We prefer temp ipv6 for their privacy properties. If we cannot get
-     * that, we prefer ipv6 that are not based on mac address. */
-    int filter_mac_ipv6 = 0;
-    int filter_teredo_ipv6 = 0;
-    int filter_non_temp_ipv6 = 0;
+    int dest_index = 0;
 
     tmp = RMALLOC(*count * sizeof(*tmp));
     if (!tmp)
         ABORT(R_NO_MEMORY);
 
-    for (i = 0; i < *count; ++i) {
-      if (addrs[i].addr.ip_version == NR_IPV6) {
-        if (nr_transport_addr_is_teredo(&addrs[i].addr)) {
-            addrs[i].interface.type |= NR_INTERFACE_TYPE_TEREDO;
-            /* Prefer teredo over mac-based address. Probably will never see
-             * both. */
-            filter_mac_ipv6 = 1;
-        } else {
-          filter_teredo_ipv6 = 1;
-        }
-
-        if (!nr_transport_addr_is_mac_based(&addrs[i].addr)) {
-          filter_mac_ipv6 = 1;
-        }
-
-        if (addrs[i].flags & NR_ADDR_FLAG_TEMPORARY) {
-          filter_non_temp_ipv6 = 1;
+    for (int i = 0; i < *count; ++i) {
+      if (i == nr_stun_filter_find_first_addr_with_ifname(addrs, *count, addrs[i].addr.ifname)) {
+        /* This is the first address associated with this interface.
+         * Filter for this interface once, now. */
+        if (r = nr_stun_filter_addrs_for_ifname(addrs, i, *count, tmp, &dest_index, remove_loopback, remove_link_local)) {
+          ABORT(r);
         }
       }
     }
 
-    n = 0;
-    for (i = 0; i < *count; ++i) {
-        if (nr_stun_is_duplicate_addr(tmp, n, &addrs[i])) {
-            /* skip addrs[i], it's a duplicate */
-        }
-        else if (remove_loopback && nr_transport_addr_is_loopback(&addrs[i].addr)) {
-            /* skip addrs[i], it's a loopback */
-        }
-        else if (remove_link_local &&
-                 nr_transport_addr_is_link_local(&addrs[i].addr)) {
-            /* skip addrs[i], it's a link-local address */
-        }
-        else if (filter_mac_ipv6 &&
-                 nr_transport_addr_is_mac_based(&addrs[i].addr)) {
-            /* skip addrs[i], it's MAC based */
-        }
-        else if (filter_teredo_ipv6 &&
-                 nr_transport_addr_is_teredo(&addrs[i].addr)) {
-            /* skip addrs[i], it's a Teredo address */
-        }
-        else if (filter_non_temp_ipv6 &&
-                 (addrs[i].addr.ip_version == NR_IPV6) &&
-                 !(addrs[i].flags & NR_ADDR_FLAG_TEMPORARY)) {
-            /* skip addrs[i], it's a non-temporary ipv6, and we have a temporary */
-        }
-        else {
-            /* otherwise, copy it to the temporary array */
-            if ((r=nr_local_addr_copy(&tmp[n], &addrs[i])))
-                ABORT(r);
-            ++n;
-        }
-    }
+    /* Clear the entire array out before copying back */
+    memset(addrs, 0, *count * sizeof(*addrs));
 
-    *count = n;
+    *count = dest_index;
 
-    memset(addrs, 0, *count * sizeof(*addrs));
     /* copy temporary array into passed in/out array */
-    for (i = 0; i < *count; ++i) {
+    for (int i = 0; i < *count; ++i) {
         if ((r=nr_local_addr_copy(&addrs[i], &tmp[i])))
             ABORT(r);
     }
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/log/r_log.c b/dom/media/webrtc/transport/third_party/nrappkit/src/log/r_log.c
index 09bb24749f..bb47cda879 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/log/r_log.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/log/r_log.c
@@ -375,22 +375,10 @@ int r_vlog(int facility,int level,const char *format,va_list ap)
 
 int stderr_vlog(int facility,int level,const char *format,va_list ap)
   {
-#if 0 /* remove time stamping, for now */
-    char cbuf[30];
-    time_t tt;
-
-    tt=time(0);
-
-    ctime_r(&tt,cbuf);
-    cbuf[strlen(cbuf)-1]=0;
-
-    fprintf(stderr,"%s: ",cbuf);
-#endif
-
     vfprintf(stderr,format,ap);
       fprintf(stderr,"\n");
     return(0);
-    }
+  }
 
 int syslog_vlog(int facility,int level,const char *format,va_list ap)
   {
@@ -525,7 +513,7 @@ int r_logging(int facility, int level)
 
 static int r_log_get_default_level(void)
   {
-    char *log;
+    char *log = 0;
     int _status;
 
     log=getenv("R_LOG_LEVEL");
@@ -546,7 +534,7 @@ static int r_log_get_default_level(void)
 
 static int r_log_get_destinations(int usereg)
   {
-    char *log;
+    char *log = 0;
     int i;
     int r,_status;
 
@@ -627,7 +615,7 @@ int r_log_init()
 int _r_log_init(int use_reg)
   {
 #ifndef WIN32
-    char *log;
+    char *log = 0;
 #endif
 
     if(r_log_initted==0) {
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry.c b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry.c
index 709b1c3fb7..3134ad1536 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry.c
@@ -563,7 +563,7 @@ NR_reg_make_registry(NR_registry parent, char *child, NR_registry out)
     int r, _status;
     size_t plen;
     size_t clen;
-    char *c;
+    char *c = 0;
     size_t i;
 
     if ((r=nr_reg_is_valid(parent)))
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry_local.c b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry_local.c
index ed6e19aaa0..e577b7d4e5 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry_local.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registry_local.c
@@ -134,19 +134,9 @@ static int nr_reg_get_array(char *name, unsigned char type, UCHAR *out, size_t s
 static int nr_reg_set(char *name, int type, void *data);
 static int nr_reg_set_array(char *name, unsigned char type, UCHAR *data, size_t length);
 static int nr_reg_set_parent_registries(char *name);
-
-/* make these static OLD_REGISTRY */
-#if 0
-static int nr_reg_fetch_node(char *name, unsigned char type, nr_registry_node **node, int *free_node);
-static char *nr_reg_alloc_node_data(char *name, nr_registry_node *node, int *freeit);
-#else
 int nr_reg_fetch_node(char *name, unsigned char type, nr_registry_node **node, int *free_node);
 char *nr_reg_alloc_node_data(char *name, nr_registry_node *node, int *freeit);
-#endif
 static int nr_reg_rfree(void *ptr);
-#if 0  /* Unused currently */
-static int nr_reg_noop(void *ptr);
-#endif
 static int nr_reg_compute_length(char *name, nr_registry_node *node, size_t *length);
 char *nr_reg_action_name(int action);
 
@@ -155,10 +145,6 @@ char *nr_reg_action_name(int action);
  * nr_array_registry_node */
 static r_assoc     *nr_registry = 0;
 
-#if 0  /* Unused currently */
-static nr_array_registry_node nr_top_level_node;
-#endif
-
 typedef struct nr_reg_find_children_arg_ {
     size_t         size;
     NR_registry   *children;
@@ -178,7 +164,7 @@ nr_reg_local_iter(NR_registry prefix, int (*action)(void *ptr, r_assoc_iterator
 {
     int r, _status;
     r_assoc_iterator iter;
-    char *name;
+    char *name = 0;
     int namel;
     nr_registry_node *node;
     int prefixl;
@@ -246,7 +232,7 @@ nr_reg_local_find_children(void *ptr, r_assoc_iterator *iter, char *prefix, char
 {
   int _status;
   int prefixl = strlen(prefix);
-  char *dot;
+  char *dot = 0;
   nr_reg_find_children_arg *arg = (void*)ptr;
 
   assert(sizeof(*(arg->children)) == sizeof(NR_registry));
@@ -275,7 +261,7 @@ int
 nr_reg_local_count_children(void *ptr, r_assoc_iterator *iter, char *prefix, char *name, nr_registry_node *node)
 {
   int prefixl = strlen(prefix);
-  char *dot;
+  char *dot = 0;
 
   /* only count children */
   if (name[prefixl] == '.') {
@@ -296,7 +282,7 @@ nr_reg_local_dump_print(void *ptr, r_assoc_iterator *iter, char *prefix, char *n
 {
     int _status;
     int freeit = 0;
-    char *data;
+    char *data = 0;
 
     /* only print leaf nodes */
     if (node->type != NR_REG_TYPE_REGISTRY) {
@@ -315,14 +301,6 @@ nr_reg_local_dump_print(void *ptr, r_assoc_iterator *iter, char *prefix, char *n
 }
 
 
-#if 0  /* Unused currently */
-int
-nr_reg_noop(void *ptr)
-{
-    return 0;
-}
-#endif
-
 int
 nr_reg_rfree(void *ptr)
 {
@@ -750,7 +728,7 @@ nr_reg_set_parent_registries(char *name)
 {
     int r, _status;
     char *parent = 0;
-    char *dot;
+    char *dot = 0;
 
     if ((parent = r_strdup(name)) == 0)
       ABORT(R_NO_MEMORY);
@@ -955,7 +933,7 @@ nr_reg_local_get_type(NR_registry name, NR_registry_type type)
 {
     int r, _status;
     nr_registry_node *node = 0;
-    char *str;
+    char *str = 0;
 
     if ((r=nr_reg_is_valid(name)))
       ABORT(r);
@@ -1044,7 +1022,7 @@ int
 nr_reg_local_get_child_count(NR_registry parent, size_t *count)
 {
     int r, _status;
-    nr_registry_node *ignore1;
+    nr_registry_node *ignore1 = 0;
     int ignore2;
 
 
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registrycb.c b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registrycb.c
index 4b326a1ee2..bd3570cefc 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registrycb.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/registry/registrycb.c
@@ -118,9 +118,9 @@ int
 nr_reg_register_callback(NR_registry name, char action, void (*cb)(void *cb_arg, char action, NR_registry name), void *cb_arg)
 {
     int r, _status;
-    r_assoc *assoc;
+    r_assoc *assoc = 0;
     int create_assoc = 0;
-    nr_reg_cb_info *info;
+    nr_reg_cb_info *info = 0;
     int create_info = 0;
     unsigned char cb_id[SIZEOF_CB_ID];
 
@@ -191,7 +191,7 @@ int
 nr_reg_unregister_callback(char *name, char action, void (*cb)(void *cb_arg, char action, NR_registry name))
 {
     int r, _status;
-    r_assoc *assoc;
+    r_assoc *assoc = 0;
     int size;
     unsigned char cb_id[SIZEOF_CB_ID];
 
@@ -283,12 +283,12 @@ int
 nr_reg_raise_event_recurse(char *name, char *tmp, int action)
 {
     int r, _status;
-    r_assoc *assoc;
+    r_assoc *assoc = 0;
     nr_reg_cb_info *info;
     r_assoc_iterator iter;
-    char *key;
+    char *key = 0;
     int keyl;
-    char *c;
+    char *c = 0;
     int free_tmp = 0;
     int count;
 
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_assoc.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_assoc.c
index 25b3827d50..eb8cb0b061 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_assoc.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_assoc.c
@@ -150,7 +150,7 @@ int r_assoc_create(assocp,hash_func,bits)
 int r_assoc_destroy(assocp)
   r_assoc **assocp;
   {
-    r_assoc *assoc;
+    r_assoc *assoc = 0;
     int i;
 
     if(!assocp || !*assocp)
@@ -169,7 +169,7 @@ int r_assoc_destroy(assocp)
 static int destroy_assoc_chain(chain)
   r_assoc_el *chain;
   {
-    r_assoc_el *nxt;
+    r_assoc_el *nxt = 0;
 
     while(chain){
       nxt=chain->next;
@@ -190,7 +190,7 @@ static int copy_assoc_chain(knewp,old)
   r_assoc_el **knewp;
   r_assoc_el *old;
   {
-    r_assoc_el *knew=0,*ptr,*tmp;
+    r_assoc_el *knew = 0, *ptr = 0, *tmp = 0;
     int r,_status;
 
     ptr=0; /* Pacify GCC's uninitialized warning.
@@ -245,7 +245,7 @@ static int r_assoc_fetch_bucket(assoc,key,len,bucketp)
   r_assoc_el **bucketp;
   {
     UINT4 hash_value;
-    r_assoc_el *bucket;
+    r_assoc_el *bucket = 0;
 
     hash_value=assoc->hash_func(key,len,assoc->bits);
 
@@ -265,7 +265,7 @@ int r_assoc_fetch(assoc,key,len,datap)
   int len;
   void **datap;
   {
-    r_assoc_el *bucket;
+    r_assoc_el *bucket = 0;
     int r;
 
     if(r=r_assoc_fetch_bucket(assoc,key,len,&bucket)){
@@ -287,7 +287,7 @@ int r_assoc_insert(assoc,key,len,data,copy,destroy,how)
   int (*destroy)(void *ptr);
   int how;
   {
-    r_assoc_el *bucket,*new_bucket=0;
+    r_assoc_el *bucket = 0, *new_bucket = 0;
     int r,_status;
 
     if(r=r_assoc_fetch_bucket(assoc,key,len,&bucket)){
@@ -340,7 +340,7 @@ int r_assoc_delete(assoc,key,len)
   int len;
   {
     int r;
-    r_assoc_el *bucket;
+    r_assoc_el *bucket = 0;
     UINT4 hash_value;
 
     if(r=r_assoc_fetch_bucket(assoc,key,len,&bucket)){
@@ -377,7 +377,7 @@ int r_assoc_copy(knewp,old)
   r_assoc *old;
   {
     int r,_status,i;
-    r_assoc *knew;
+    r_assoc *knew = 0;
 
     if(!(knew=(r_assoc *)RCALLOC(sizeof(r_assoc))))
       ABORT(R_NO_MEMORY);
@@ -441,7 +441,7 @@ int r_assoc_iter(iter,key,keyl,val)
   void **val;
   {
     int i;
-    r_assoc_el *ret;
+    r_assoc_el *ret = 0;
 
     if(!iter->next)
       return(R_EOD);
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_crc32.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_crc32.c
index 38d3e4da38..6def127dfd 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_crc32.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_crc32.c
@@ -157,7 +157,7 @@ r_crc32(buf, dlen, cval)
   u_int32_t *cval;
 {
     u_int32_t crc = ~0;
-    char *p ;
+    char *p = 0;
     int i;
     u_int32_t crc32_total = 0 ;
 
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_data.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_data.c
index dfb7af2d5c..23df74fb8b 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_data.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_data.c
@@ -183,7 +183,7 @@ int r_data_destroy(dp)
 int r_data_destroy_v(v)
   void *v;
   {
-    Data *d;
+    Data *d = 0;
 
     if(!v)
       return(0);
@@ -199,7 +199,7 @@ int r_data_destroy_v(v)
 int r_data_destroy_vp(v)
   void **v;
   {
-    Data *d;
+    Data *d = 0;
 
     if(!v || !*v)
       return(0);
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_list.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_list.c
index 4e71d67030..527d39b43a 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_list.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_list.c
@@ -117,8 +117,8 @@ int r_list_create(listp)
 int r_list_destroy(listp)
   r_list **listp;
   {
-    r_list *list;
-    r_list_el *el;
+    r_list *list = 0;
+    r_list_el *el = 0;
 
     if(!listp || !*listp)
       return(0);
@@ -147,7 +147,7 @@ int r_list_copy(outp,in)
   r_list *in;
   {
     r_list *out=0;
-    r_list_el *el,*el2,*last=0;
+    r_list_el *el = 0, *el2 = 0, *last = 0;
     int r, _status;
 
     if(!in){
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_memory.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_memory.c
index 53846fc019..3cfcc916d4 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_memory.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_memory.c
@@ -66,7 +66,7 @@ void *r_malloc(type,size)
   size_t size;
   {
     size_t total;
-    r_malloc_chunk *chunk;
+    r_malloc_chunk *chunk = 0;
 
     total=size+sizeof(r_malloc_chunk);
 
@@ -90,7 +90,7 @@ void *r_calloc(type,number,size)
   size_t number;
   size_t size;
   {
-    void *ret;
+    void *ret = 0;
     size_t total;
 
     total=number*size;
@@ -106,7 +106,7 @@ void *r_calloc(type,number,size)
 void r_free(ptr)
   void *ptr;
   {
-    r_malloc_chunk *chunk;
+    r_malloc_chunk *chunk = 0;
 
     if(!ptr) return;
 
@@ -125,7 +125,7 @@ void *r_realloc(ptr,size)
   void *ptr;
   size_t size;
   {
-    r_malloc_chunk *chunk,*nchunk;
+    r_malloc_chunk *chunk = 0, *nchunk = 0;
     size_t total;
 
     if(!ptr) return(r_malloc(255,size));
@@ -154,7 +154,7 @@ char *r_strdup(str)
   const char *str;
   {
     int len;
-    char *nstr;
+    char *nstr = 0;
 
     if(!str)
       return(0);
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_replace.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_replace.c
index 8916b884cc..4dc8feb878 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_replace.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/libekr/r_replace.c
@@ -88,7 +88,7 @@ char *strdup(str)
   char *str;
   {
     int len=strlen(str);
-    char *n;
+    char *n = 0;
 
     if(!(n=(char *)malloc(len+1)))
       return(0);
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/p_buf.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/p_buf.c
index 459baecdda..6ada8420ed 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/p_buf.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/p_buf.c
@@ -72,7 +72,7 @@ int nr_p_buf_ctx_create(size,ctxp)
 int nr_p_buf_ctx_destroy(ctxp)
   nr_p_buf_ctx **ctxp;
   {
-    nr_p_buf_ctx *ctx;
+    nr_p_buf_ctx *ctx = 0;
 
     if(!ctxp || !*ctxp)
       return(0);
@@ -133,7 +133,7 @@ int nr_p_buf_free_chain(ctx,head)
   nr_p_buf_ctx *ctx;
   nr_p_buf_head *head;
   {
-    nr_p_buf *n1,*n2;
+    nr_p_buf *n1 = 0, *n2 = 0;
 
     n1=STAILQ_FIRST(head);
     while(n1){
@@ -155,7 +155,7 @@ int nr_p_buf_write_to_chain(ctx,chain,data,len)
   UINT4 len;
   {
     int r,_status;
-    nr_p_buf *buf;
+    nr_p_buf *buf = 0;
 
     buf=STAILQ_LAST(chain,nr_p_buf_,entry);
     while(len){
@@ -186,7 +186,7 @@ int nr_p_buf_write_to_chain(ctx,chain,data,len)
 static int nr_p_buf_destroy_chain(head)
   nr_p_buf_head *head;
   {
-    nr_p_buf *n1,*n2;
+    nr_p_buf *n1 = 0, *n2 = 0;
 
     n1=STAILQ_FIRST(head);
     while(n1){
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.c b/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.c
index 79b14a8967..51f75832b1 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.c
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.c
@@ -79,38 +79,6 @@ int nr_get_filename(base,name,namep)
     return(_status);
   }
 
-#if 0
-int read_RSA_private_key(base,name,keyp)
-  char *base;
-  char *name;
-  RSA **keyp;
-  {
-    char *keyfile=0;
-    BIO *bio=0;
-    FILE *fp=0;
-    RSA *rsa=0;
-    int r,_status;
-
-    /* Load the keyfile */
-    if(r=get_filename(base,name,&keyfile))
-      ABORT(r);
-    if(!(fp=fopen(keyfile,"r")))
-      ABORT(R_NOT_FOUND);
-    if(!(bio=BIO_new(BIO_s_file())))
-      ABORT(R_NO_MEMORY);
-    BIO_set_fp(bio,fp,BIO_NOCLOSE);
-
-    if(!(rsa=PEM_read_bio_RSAPrivateKey(bio,0,0,0)))
-      ABORT(R_NOT_FOUND);
-
-    *keyp=rsa;
-    _status=0;
-  abort:
-    return(_status);
-  }
-#endif
-
-
 void nr_errprintf_log(const char *format,...)
   {
     va_list ap;
@@ -296,55 +264,6 @@ int nr_sha1_file(char *filename,UCHAR *out)
   // TODO
 #else
 
-#if 0
-
-#include <fts.h>
-
-int nr_rm_tree(char *path)
-  {
-    FTS *fts=0;
-    FTSENT *p;
-    int failed=0;
-    int _status;
-    char *argv[2];
-
-    argv[0]=path;
-    argv[1]=0;
-
-    if(!(fts=fts_open(argv,0,NULL))){
-      r_log_e(LOG_COMMON,LOG_ERR,"Couldn't open directory %s",path);
-      ABORT(R_FAILED);
-    }
-
-    while(p=fts_read(fts)){
-      switch(p->fts_info){
-        case FTS_D:
-          break;
-        case FTS_DOT:
-          break;
-        case FTS_ERR:
-          r_log_e(LOG_COMMON,LOG_ERR,"Problem reading %s",p->fts_path);
-          break;
-        default:
-          r_log(LOG_COMMON,LOG_DEBUG,"Removing %s",p->fts_path);
-          errno=0;
-          if(remove(p->fts_path)){
-            r_log_e(LOG_COMMON,LOG_ERR,"Problem removing %s",p->fts_path);
-            failed=1;
-          }
-      }
-    }
-
-    if(failed)
-      ABORT(R_FAILED);
-
-    _status=0;
-  abort:
-    if(fts) fts_close(fts);
-    return(_status);
-  }
-#endif
-
 int nr_write_pid_file(char *pid_filename)
   {
     FILE *fp;
@@ -625,7 +544,7 @@ inet_ntop6(const unsigned char *src, char *dst, size_t size)
    * to use pointer overlays.  All the world's not a VAX.
    */
   char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"];
-  char *tp, *ep;
+  char *tp = 0, *ep = 0;
   struct { int base, len; } best, cur;
   unsigned int words[NS_IN6ADDRSZ / NS_INT16SZ];
   int i;
diff --git a/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.h b/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.h
index d7861659cd..26c692fbbe 100644
--- a/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.h
+++ b/dom/media/webrtc/transport/third_party/nrappkit/src/util/util.h
@@ -43,11 +43,6 @@
 #include "registry.h"
 
 int nr_get_filename(char *base,char *name, char **namep);
-#if 0
-#include <openssl/ssl.h>
-
-int read_RSA_private_key(char *base, char *name,RSA **keyp);
-#endif
 void nr_errprintf_log(const char *fmt,...);
 void nr_errprintf_log2(void *ignore, const char *fmt,...);
 extern int nr_util_default_log_facility;
diff --git a/dom/media/webrtc/transport/transportlayerdtls.cpp b/dom/media/webrtc/transport/transportlayerdtls.cpp
index 4ab8aaa029..1279726bce 100644
--- a/dom/media/webrtc/transport/transportlayerdtls.cpp
+++ b/dom/media/webrtc/transport/transportlayerdtls.cpp
@@ -9,12 +9,14 @@
 #include "transportlayerdtls.h"
 
 #include <algorithm>
+#include <iomanip>
 #include <queue>
 #include <sstream>
 
 #include "dtlsidentity.h"
 #include "keyhi.h"
 #include "logging.h"
+#include "mozilla/glean/GleanMetrics.h"
 #include "mozilla/Telemetry.h"
 #include "mozilla/UniquePtr.h"
 #include "mozilla/Unused.h"
@@ -889,6 +891,7 @@ void TransportLayerDtls::Handshake() {
     if (!cert_ok_) {
       MOZ_MTLOG(ML_ERROR, LAYER_INFO << "Certificate check never occurred");
       TL_SET_STATE(TS_ERROR);
+      RecordHandshakeCompletionTelemetry("CERT_FAILURE");
       return;
     }
     if (!CheckAlpn()) {
@@ -897,11 +900,13 @@ void TransportLayerDtls::Handshake() {
       // (assuming the close_notify isn't dropped).
       ssl_fd_ = nullptr;
       TL_SET_STATE(TS_ERROR);
+      RecordHandshakeCompletionTelemetry("ALPN_FAILURE");
       return;
     }
 
     TL_SET_STATE(TS_OPEN);
 
+    RecordHandshakeCompletionTelemetry("SUCCESS");
     RecordTlsTelemetry();
     timer_ = nullptr;
   } else {
@@ -932,6 +937,7 @@ void TransportLayerDtls::Handshake() {
         MOZ_MTLOG(ML_ERROR, LAYER_INFO << "DTLS handshake error " << err << " ("
                                        << err_msg << ")");
         TL_SET_STATE(TS_ERROR);
+        RecordHandshakeCompletionTelemetry(err_msg);
         break;
     }
   }
@@ -1468,6 +1474,17 @@ void TransportLayerDtls::TimerCallback(nsITimer* timer, void* arg) {
   dtls->Handshake();
 }
 
+void TransportLayerDtls::RecordHandshakeCompletionTelemetry(
+    const char* aResult) {
+  if (role_ == CLIENT) {
+    mozilla::glean::webrtcdtls::client_handshake_result.Get(nsCString(aResult))
+        .Add(1);
+  } else {
+    mozilla::glean::webrtcdtls::server_handshake_result.Get(nsCString(aResult))
+        .Add(1);
+  }
+}
+
 void TransportLayerDtls::RecordTlsTelemetry() {
   MOZ_ASSERT(state_ == TS_OPEN);
   SSLChannelInfo info;
@@ -1478,54 +1495,29 @@ void TransportLayerDtls::RecordTlsTelemetry() {
     return;
   }
 
-  uint16_t telemetry_cipher = 0;
-
-  switch (info.cipherSuite) {
-    /* Old DHE ciphers: candidates for removal, see bug 1227519 */
-    case TLS_DHE_RSA_WITH_AES_128_CBC_SHA:
-      telemetry_cipher = 1;
-      break;
-    case TLS_DHE_RSA_WITH_AES_256_CBC_SHA:
-      telemetry_cipher = 2;
-      break;
-    /* Current ciphers */
-    case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
-      telemetry_cipher = 3;
-      break;
-    case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
-      telemetry_cipher = 4;
-      break;
-    case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
-      telemetry_cipher = 5;
-      break;
-    case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
-      telemetry_cipher = 6;
-      break;
-    case TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
-      telemetry_cipher = 7;
+  switch (info.protocolVersion) {
+    case SSL_LIBRARY_VERSION_TLS_1_1:
+      mozilla::glean::webrtcdtls::protocol_version.Get("1.0"_ns).Add(1);
       break;
-    case TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:
-      telemetry_cipher = 8;
+    case SSL_LIBRARY_VERSION_TLS_1_2:
+      mozilla::glean::webrtcdtls::protocol_version.Get("1.2"_ns).Add(1);
       break;
-    case TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256:
-      telemetry_cipher = 9;
-      break;
-    case TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256:
-      telemetry_cipher = 10;
-      break;
-    /* TLS 1.3 ciphers */
-    case TLS_AES_128_GCM_SHA256:
-      telemetry_cipher = 11;
-      break;
-    case TLS_CHACHA20_POLY1305_SHA256:
-      telemetry_cipher = 12;
-      break;
-    case TLS_AES_256_GCM_SHA384:
-      telemetry_cipher = 13;
+    case SSL_LIBRARY_VERSION_TLS_1_3:
+      mozilla::glean::webrtcdtls::protocol_version.Get("1.3"_ns).Add(1);
       break;
+    default:
+      MOZ_CRASH("Unknown SSL version");
   }
 
-  Telemetry::Accumulate(Telemetry::WEBRTC_DTLS_CIPHER, telemetry_cipher);
+  {
+    std::ostringstream oss;
+    // Record TLS cipher-suite ID as a string (eg;
+    // TLS_DHE_RSA_WITH_AES_128_CBC_SHA is 0x0033)
+    oss << "0x" << std::setfill('0') << std::setw(4) << std::hex
+        << info.cipherSuite;
+    mozilla::glean::webrtcdtls::cipher.Get(nsCString(oss.str().c_str())).Add(1);
+    MOZ_MTLOG(ML_DEBUG, "cipher: " << oss.str());
+  }
 
   uint16_t cipher;
   nsresult rv = GetSrtpCipher(&cipher);
@@ -1535,24 +1527,15 @@ void TransportLayerDtls::RecordTlsTelemetry() {
     return;
   }
 
-  auto cipher_label = mozilla::Telemetry::LABELS_WEBRTC_SRTP_CIPHER::Unknown;
-
-  switch (cipher) {
-    case kDtlsSrtpAes128CmHmacSha1_80:
-      cipher_label = Telemetry::LABELS_WEBRTC_SRTP_CIPHER::Aes128CmHmacSha1_80;
-      break;
-    case kDtlsSrtpAes128CmHmacSha1_32:
-      cipher_label = Telemetry::LABELS_WEBRTC_SRTP_CIPHER::Aes128CmHmacSha1_32;
-      break;
-    case kDtlsSrtpAeadAes128Gcm:
-      cipher_label = Telemetry::LABELS_WEBRTC_SRTP_CIPHER::AeadAes128Gcm;
-      break;
-    case kDtlsSrtpAeadAes256Gcm:
-      cipher_label = Telemetry::LABELS_WEBRTC_SRTP_CIPHER::AeadAes256Gcm;
-      break;
+  {
+    std::ostringstream oss;
+    // Record SRTP cipher-suite ID as a string (eg;
+    // SRTP_AES128_CM_HMAC_SHA1_80 is 0x0001)
+    oss << "0x" << std::setfill('0') << std::setw(4) << std::hex << cipher;
+    mozilla::glean::webrtcdtls::srtp_cipher.Get(nsCString(oss.str().c_str()))
+        .Add(1);
+    MOZ_MTLOG(ML_DEBUG, "srtp cipher: " << oss.str());
   }
-
-  Telemetry::AccumulateCategorical(cipher_label);
 }
 
 }  // namespace mozilla
diff --git a/dom/media/webrtc/transport/transportlayerdtls.h b/dom/media/webrtc/transport/transportlayerdtls.h
index d68a6e77d5..e0370a04b2 100644
--- a/dom/media/webrtc/transport/transportlayerdtls.h
+++ b/dom/media/webrtc/transport/transportlayerdtls.h
@@ -144,7 +144,7 @@ class TransportLayerDtls final : public TransportLayer {
   SECStatus CheckDigest(const DtlsDigest& digest,
                         UniqueCERTCertificate& cert) const;
 
-  void RecordHandshakeCompletionTelemetry(TransportLayer::State endState);
+  void RecordHandshakeCompletionTelemetry(const char* aResult);
   void RecordTlsTelemetry();
 
   static PRBool WriteSrtpXtn(PRFileDesc* fd, SSLHandshakeType message,
diff --git a/dom/media/webvtt/vtt.sys.mjs b/dom/media/webvtt/vtt.sys.mjs
index 9e8071c427..af400fbbfe 100644
--- a/dom/media/webvtt/vtt.sys.mjs
+++ b/dom/media/webvtt/vtt.sys.mjs
@@ -351,15 +351,44 @@ function parseContent(window, input, mode) {
     return consume(m[1] ? m[1] : m[2]);
   }
 
-  // Unescape a string 's'.
-  function unescape1(e) {
-    return ESCAPE[e];
-  }
-  function unescape(s) {
-    let m;
-    while ((m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/))) {
-      s = s.replace(m[0], unescape1);
-    }
+  const unescapeHelper = window.document.createElement("div");
+  function unescapeEntities(s) {
+    let match;
+
+    // Decimal numeric character reference
+    s = s.replace(/&#(\d+);?/g, (candidate, number) => {
+      try {
+        const codepoint = parseInt(number);
+        return String.fromCodePoint(codepoint);
+      } catch (_) {
+        return candidate;
+      }
+    });
+
+    // Hexadecimal numeric character reference
+    s = s.replace(/&#x([\dA-Fa-f]+);?/g, (candidate, number) => {
+      try {
+        const codepoint = parseInt(number, 16);
+        return String.fromCodePoint(codepoint);
+      } catch (_) {
+        return candidate;
+      }
+    });
+
+    // Named character references
+    s = s.replace(/&\w[\w\d]*;?/g, candidate => {
+      // The list of entities is huge, so we use innerHTML instead.
+      // We should probably use setHTML instead once that is available (bug 1650370).
+      // Ideally we would be able to use a faster/simpler variant of setHTML (bug 1731215).
+      unescapeHelper.innerHTML = candidate;
+      const unescaped = unescapeHelper.innerText;
+      if (unescaped == candidate) { // not a valid entity
+        return candidate;
+      }
+      return unescaped;
+    });
+    unescapeHelper.innerHTML = "";
+
     return s;
   }
 
@@ -432,12 +461,21 @@ function parseContent(window, input, mode) {
   while ((t = nextToken()) !== null) {
     if (t[0] === '<') {
       if (t[1] === "/") {
+        const endTag = t.slice(2, -1);
+        const stackEnd = tagStack.at(-1);
+
         // If the closing tag matches, move back up to the parent node.
-        if (tagStack.length &&
-            tagStack[tagStack.length - 1] === t.substr(2).replace(">", "")) {
+        if (stackEnd == endTag) {
           tagStack.pop();
           current = current.parentNode;
+
+        // If the closing tag is <ruby> and we're at an <rt>, move back up to
+        // the <ruby>'s parent node.
+        } else if (endTag == "ruby" && current.nodeName == "RT") {
+          tagStack.pop();
+          current = current.parentNode.parentNode;
         }
+
         // Otherwise just ignore the end tag.
         continue;
       }
@@ -477,7 +515,7 @@ function parseContent(window, input, mode) {
     }
 
     // Text nodes are leaf nodes.
-    current.appendChild(window.document.createTextNode(unescape(t)));
+    current.appendChild(window.document.createTextNode(unescapeEntities(t)));
   }
 
   return root;