Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 739 insertions, 0 deletions

diff --git a/dom/media/gtest/MockCubeb.cpp b/dom/media/gtest/MockCubeb.cpp
new file mode 100644
index 0000000000..ae3a676ac8
--- /dev/null
+++ b/dom/media/gtest/MockCubeb.cpp
@@ -0,0 +1,739 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
+/* 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 "MockCubeb.h"
+
+#include "gtest/gtest.h"
+
+namespace mozilla {
+
+using KeepProcessing = MockCubebStream::KeepProcessing;
+
+void PrintDevice(cubeb_device_info aInfo) {
+  printf(
+      "id: %zu\n"
+      "device_id: %s\n"
+      "friendly_name: %s\n"
+      "group_id: %s\n"
+      "vendor_name: %s\n"
+      "type: %d\n"
+      "state: %d\n"
+      "preferred: %d\n"
+      "format: %d\n"
+      "default_format: %d\n"
+      "max_channels: %d\n"
+      "default_rate: %d\n"
+      "max_rate: %d\n"
+      "min_rate: %d\n"
+      "latency_lo: %d\n"
+      "latency_hi: %d\n",
+      reinterpret_cast<uintptr_t>(aInfo.devid), aInfo.device_id,
+      aInfo.friendly_name, aInfo.group_id, aInfo.vendor_name, aInfo.type,
+      aInfo.state, aInfo.preferred, aInfo.format, aInfo.default_format,
+      aInfo.max_channels, aInfo.default_rate, aInfo.max_rate, aInfo.min_rate,
+      aInfo.latency_lo, aInfo.latency_hi);
+}
+
+void PrintDevice(AudioDeviceInfo* aInfo) {
+  cubeb_devid id;
+  nsString name;
+  nsString groupid;
+  nsString vendor;
+  uint16_t type;
+  uint16_t state;
+  uint16_t preferred;
+  uint16_t supportedFormat;
+  uint16_t defaultFormat;
+  uint32_t maxChannels;
+  uint32_t defaultRate;
+  uint32_t maxRate;
+  uint32_t minRate;
+  uint32_t maxLatency;
+  uint32_t minLatency;
+
+  id = aInfo->DeviceID();
+  aInfo->GetName(name);
+  aInfo->GetGroupId(groupid);
+  aInfo->GetVendor(vendor);
+  aInfo->GetType(&type);
+  aInfo->GetState(&state);
+  aInfo->GetPreferred(&preferred);
+  aInfo->GetSupportedFormat(&supportedFormat);
+  aInfo->GetDefaultFormat(&defaultFormat);
+  aInfo->GetMaxChannels(&maxChannels);
+  aInfo->GetDefaultRate(&defaultRate);
+  aInfo->GetMaxRate(&maxRate);
+  aInfo->GetMinRate(&minRate);
+  aInfo->GetMinLatency(&minLatency);
+  aInfo->GetMaxLatency(&maxLatency);
+
+  printf(
+      "device id: %zu\n"
+      "friendly_name: %s\n"
+      "group_id: %s\n"
+      "vendor_name: %s\n"
+      "type: %d\n"
+      "state: %d\n"
+      "preferred: %d\n"
+      "format: %d\n"
+      "default_format: %d\n"
+      "max_channels: %d\n"
+      "default_rate: %d\n"
+      "max_rate: %d\n"
+      "min_rate: %d\n"
+      "latency_lo: %d\n"
+      "latency_hi: %d\n",
+      reinterpret_cast<uintptr_t>(id), NS_LossyConvertUTF16toASCII(name).get(),
+      NS_LossyConvertUTF16toASCII(groupid).get(),
+      NS_LossyConvertUTF16toASCII(vendor).get(), type, state, preferred,
+      supportedFormat, defaultFormat, maxChannels, defaultRate, maxRate,
+      minRate, minLatency, maxLatency);
+}
+
+cubeb_device_info DeviceTemplate(cubeb_devid aId, cubeb_device_type aType,
+                                 const char* name) {
+  // A fake input device
+  cubeb_device_info device;
+  device.devid = aId;
+  device.device_id = "nice name";
+  device.friendly_name = name;
+  device.group_id = "the physical device";
+  device.vendor_name = "mozilla";
+  device.type = aType;
+  device.state = CUBEB_DEVICE_STATE_ENABLED;
+  device.preferred = CUBEB_DEVICE_PREF_NONE;
+  device.format = CUBEB_DEVICE_FMT_F32NE;
+  device.default_format = CUBEB_DEVICE_FMT_F32NE;
+  device.max_channels = 2;
+  device.default_rate = 44100;
+  device.max_rate = 44100;
+  device.min_rate = 16000;
+  device.latency_lo = 256;
+  device.latency_hi = 1024;
+
+  return device;
+}
+
+cubeb_device_info DeviceTemplate(cubeb_devid aId, cubeb_device_type aType) {
+  return DeviceTemplate(aId, aType, "nice name");
+}
+
+void AddDevices(MockCubeb* mock, uint32_t device_count,
+                cubeb_device_type deviceType) {
+  mock->ClearDevices(deviceType);
+  // Add a few input devices (almost all the same but it does not really
+  // matter as long as they have distinct IDs and only one is the default
+  // devices)
+  for (uintptr_t i = 0; i < device_count; i++) {
+    cubeb_device_info device =
+        DeviceTemplate(reinterpret_cast<void*>(i + 1), deviceType);
+    // Make it so that the last device is the default input device.
+    if (i == device_count - 1) {
+      device.preferred = CUBEB_DEVICE_PREF_ALL;
+    }
+    mock->AddDevice(device);
+  }
+}
+
+void cubeb_mock_destroy(cubeb* context) {
+  MockCubeb::AsMock(context)->Destroy();
+}
+
+MockCubebStream::MockCubebStream(
+    cubeb* aContext, char const* aStreamName, cubeb_devid aInputDevice,
+    cubeb_stream_params* aInputStreamParams, cubeb_devid aOutputDevice,
+    cubeb_stream_params* aOutputStreamParams, cubeb_data_callback aDataCallback,
+    cubeb_state_callback aStateCallback, void* aUserPtr,
+    SmartMockCubebStream* aSelf, RunningMode aRunningMode, bool aFrozenStart)
+    : context(aContext),
+      mUserPtr(aUserPtr),
+      mRunningMode(aRunningMode),
+      mHasInput(aInputStreamParams),
+      mHasOutput(aOutputStreamParams),
+      mSelf(aSelf),
+      mFrozenStartMonitor("MockCubebStream::mFrozenStartMonitor"),
+      mFrozenStart(aFrozenStart),
+      mDataCallback(aDataCallback),
+      mStateCallback(aStateCallback),
+      mName(aStreamName),
+      mInputDeviceID(aInputDevice),
+      mOutputDeviceID(aOutputDevice),
+      mAudioGenerator(aInputStreamParams ? aInputStreamParams->channels
+                                         : MAX_INPUT_CHANNELS,
+                      aInputStreamParams ? aInputStreamParams->rate
+                                         : aOutputStreamParams->rate,
+                      100 /* aFrequency */),
+      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);
+  if (aInputStreamParams) {
+    mInputParams = *aInputStreamParams;
+  }
+  if (aOutputStreamParams) {
+    mOutputParams = *aOutputStreamParams;
+    MOZ_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) {
+            MockCubeb::AsMock(context)->StartStream(mSelf);
+          }
+        }));
+    while (!temp->mFinished) {
+      temp->mMonitor.Wait();
+    }
+    return CUBEB_OK;
+  }
+  MockCubeb::AsMock(context)->StartStream(this);
+  return CUBEB_OK;
+}
+
+int MockCubebStream::Stop() {
+  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; }
+
+void MockCubebStream::Destroy() {
+  // Stop() even if cubeb_stream_stop() has already been called, as with
+  // audioipc.  https://bugzilla.mozilla.org/show_bug.cgi?id=1801190#c1
+  // This provides an extra STOPPED state callback as with audioipc.
+  // It also ensures that this stream is removed from MockCubeb::mLiveStreams.
+  Stop();
+  mDestroyed = true;
+  MockCubeb::AsMock(context)->StreamDestroy(this);
+}
+
+int MockCubebStream::SetName(char const* aName) {
+  mName = aName;
+  mNameSetEvent.Notify(mName);
+  return CUBEB_OK;
+}
+
+int MockCubebStream::RegisterDeviceChangedCallback(
+    cubeb_device_changed_callback aDeviceChangedCallback) {
+  if (mDeviceChangedCallback && aDeviceChangedCallback) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+  mDeviceChangedCallback = aDeviceChangedCallback;
+  return CUBEB_OK;
+}
+
+cubeb_stream* MockCubebStream::AsCubebStream() {
+  MOZ_ASSERT(!mDestroyed);
+  return reinterpret_cast<cubeb_stream*>(this);
+}
+
+MockCubebStream* MockCubebStream::AsMock(cubeb_stream* aStream) {
+  auto* mockStream = reinterpret_cast<MockCubebStream*>(aStream);
+  MOZ_ASSERT(!mockStream->mDestroyed);
+  return mockStream;
+}
+
+cubeb_devid MockCubebStream::GetInputDeviceID() const { return mInputDeviceID; }
+
+cubeb_devid MockCubebStream::GetOutputDeviceID() const {
+  return mOutputDeviceID;
+}
+
+uint32_t MockCubebStream::InputChannels() const {
+  return mAudioGenerator.ChannelCount();
+}
+
+uint32_t MockCubebStream::OutputChannels() const {
+  return mOutputParams.channels;
+}
+
+uint32_t MockCubebStream::SampleRate() const {
+  return mAudioGenerator.mSampleRate;
+}
+
+uint32_t MockCubebStream::InputFrequency() const {
+  return mAudioGenerator.mFrequency;
+}
+
+nsTArray<AudioDataValue>&& MockCubebStream::TakeRecordedOutput() {
+  return std::move(mRecordedOutput);
+}
+
+nsTArray<AudioDataValue>&& MockCubebStream::TakeRecordedInput() {
+  return std::move(mRecordedInput);
+}
+
+void MockCubebStream::SetDriftFactor(float aDriftFactor) {
+  MOZ_ASSERT(mRunningMode == MockCubeb::RunningMode::Automatic);
+  mDriftFactor = aDriftFactor;
+}
+
+void MockCubebStream::ForceError() { mForceErrorState = true; }
+
+void MockCubebStream::ForceDeviceChanged() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  mForceDeviceChanged = true;
+};
+
+void MockCubebStream::NotifyDeviceChangedNow() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Manual);
+  NotifyDeviceChanged();
+}
+
+void MockCubebStream::Thaw() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  MonitorAutoLock l(mFrozenStartMonitor);
+  mFrozenStart = false;
+  mFrozenStartMonitor.Notify();
+}
+
+void MockCubebStream::SetOutputRecordingEnabled(bool aEnabled) {
+  mOutputRecordingEnabled = aEnabled;
+}
+
+void MockCubebStream::SetInputRecordingEnabled(bool aEnabled) {
+  mInputRecordingEnabled = aEnabled;
+}
+
+MediaEventSource<nsCString>& MockCubebStream::NameSetEvent() {
+  return mNameSetEvent;
+}
+
+MediaEventSource<cubeb_state>& MockCubebStream::StateEvent() {
+  return mStateEvent;
+}
+
+MediaEventSource<uint32_t>& MockCubebStream::FramesProcessedEvent() {
+  return mFramesProcessedEvent;
+}
+
+MediaEventSource<uint32_t>& MockCubebStream::FramesVerifiedEvent() {
+  return mFramesVerifiedEvent;
+}
+
+MediaEventSource<std::tuple<uint64_t, float, uint32_t>>&
+MockCubebStream::OutputVerificationEvent() {
+  return mOutputVerificationEvent;
+}
+
+MediaEventSource<void>& MockCubebStream::ErrorForcedEvent() {
+  return mErrorForcedEvent;
+}
+
+MediaEventSource<void>& MockCubebStream::DeviceChangeForcedEvent() {
+  return mDeviceChangedForcedEvent;
+}
+
+KeepProcessing MockCubebStream::ManualDataCallback(long aNrFrames) {
+  MOZ_ASSERT(mRunningMode == RunningMode::Manual);
+  MOZ_ASSERT(aNrFrames <= kMaxNrFrames);
+  return Process(aNrFrames);
+}
+
+KeepProcessing MockCubebStream::Process(long aNrFrames) {
+  if (mInputParams.rate) {
+    mAudioGenerator.GenerateInterleaved(mInputBuffer, aNrFrames);
+  }
+  cubeb_stream* stream = AsCubebStream();
+  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;
+
+  mFramesProcessedEvent.Notify(outframes);
+  if (mAudioVerifier.PreSilenceEnded()) {
+    mFramesVerifiedEvent.Notify(outframes);
+  }
+
+  if (outframes < aNrFrames) {
+    NotifyState(CUBEB_STATE_DRAINED);
+    return KeepProcessing::No;
+  }
+  if (mForceErrorState) {
+    mForceErrorState = false;
+    NotifyState(CUBEB_STATE_ERROR);
+    mErrorForcedEvent.Notify();
+    return KeepProcessing::No;
+  }
+  if (mForceDeviceChanged) {
+    mForceDeviceChanged = false;
+    // The device-changed callback is not necessary to be run in the
+    // audio-callback thread. It's up to the platform APIs. We don't have any
+    // control over them. Fire the device-changed callback in another thread to
+    // simulate this.
+    NS_DispatchBackgroundTask(NS_NewRunnableFunction(
+        __func__, [this, self = RefPtr(mSelf)] { NotifyDeviceChanged(); }));
+  }
+  return KeepProcessing::Yes;
+}
+
+KeepProcessing MockCubebStream::Process10Ms() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  uint32_t rate = SampleRate();
+  const long nrFrames =
+      static_cast<long>(static_cast<float>(rate * 10) * mDriftFactor) /
+      PR_MSEC_PER_SEC;
+  return Process(nrFrames);
+}
+
+void MockCubebStream::NotifyState(cubeb_state aState) {
+  mStateCallback(AsCubebStream(), mUserPtr, aState);
+  mStateEvent.Notify(aState);
+}
+
+void MockCubebStream::NotifyDeviceChanged() {
+  mDeviceChangedCallback(this->mUserPtr);
+  mDeviceChangedForcedEvent.Notify();
+}
+
+MockCubeb::MockCubeb() : MockCubeb(MockCubeb::RunningMode::Automatic) {}
+
+MockCubeb::MockCubeb(RunningMode aRunningMode)
+    : ops(&mock_ops), mRunningMode(aRunningMode) {}
+
+MockCubeb::~MockCubeb() { MOZ_ASSERT(!mFakeAudioThread); };
+
+void MockCubeb::Destroy() {
+  MOZ_ASSERT(mHasCubebContext);
+  {
+    auto streams = mLiveStreams.Lock();
+    MOZ_ASSERT(streams->IsEmpty());
+  }
+  mDestroyed = true;
+  Release();
+}
+
+cubeb* MockCubeb::AsCubebContext() {
+  MOZ_ASSERT(!mDestroyed);
+  if (mHasCubebContext.compareExchange(false, true)) {
+    AddRef();
+  }
+  return reinterpret_cast<cubeb*>(this);
+}
+
+MockCubeb* MockCubeb::AsMock(cubeb* aContext) {
+  auto* mockCubeb = reinterpret_cast<MockCubeb*>(aContext);
+  MOZ_ASSERT(!mockCubeb->mDestroyed);
+  return mockCubeb;
+}
+
+int MockCubeb::EnumerateDevices(cubeb_device_type aType,
+                                cubeb_device_collection* aCollection) {
+#ifdef ANDROID
+  EXPECT_TRUE(false) << "This is not to be called on Android.";
+#endif
+  size_t count = 0;
+  if (aType & CUBEB_DEVICE_TYPE_INPUT) {
+    count += mInputDevices.Length();
+  }
+  if (aType & CUBEB_DEVICE_TYPE_OUTPUT) {
+    count += mOutputDevices.Length();
+  }
+  aCollection->device = new cubeb_device_info[count];
+  aCollection->count = count;
+
+  uint32_t collection_index = 0;
+  if (aType & CUBEB_DEVICE_TYPE_INPUT) {
+    for (auto& device : mInputDevices) {
+      aCollection->device[collection_index] = device;
+      collection_index++;
+    }
+  }
+  if (aType & CUBEB_DEVICE_TYPE_OUTPUT) {
+    for (auto& device : mOutputDevices) {
+      aCollection->device[collection_index] = device;
+      collection_index++;
+    }
+  }
+
+  return CUBEB_OK;
+}
+
+int MockCubeb::DestroyDeviceCollection(cubeb_device_collection* aCollection) {
+  delete[] aCollection->device;
+  aCollection->count = 0;
+  return CUBEB_OK;
+}
+
+int MockCubeb::RegisterDeviceCollectionChangeCallback(
+    cubeb_device_type aDevType,
+    cubeb_device_collection_changed_callback aCallback, void* aUserPtr) {
+  if (!mSupportsDeviceCollectionChangedCallback) {
+    return CUBEB_ERROR;
+  }
+
+  if (aDevType & CUBEB_DEVICE_TYPE_INPUT) {
+    mInputDeviceCollectionChangeCallback = aCallback;
+    mInputDeviceCollectionChangeUserPtr = aUserPtr;
+  }
+  if (aDevType & CUBEB_DEVICE_TYPE_OUTPUT) {
+    mOutputDeviceCollectionChangeCallback = aCallback;
+    mOutputDeviceCollectionChangeUserPtr = aUserPtr;
+  }
+
+  return CUBEB_OK;
+}
+
+void MockCubeb::AddDevice(cubeb_device_info aDevice) {
+  if (aDevice.type == CUBEB_DEVICE_TYPE_INPUT) {
+    mInputDevices.AppendElement(aDevice);
+  } else if (aDevice.type == CUBEB_DEVICE_TYPE_OUTPUT) {
+    mOutputDevices.AppendElement(aDevice);
+  } else {
+    MOZ_CRASH("bad device type when adding a device in mock cubeb backend");
+  }
+
+  bool isInput = aDevice.type & CUBEB_DEVICE_TYPE_INPUT;
+  if (isInput && mInputDeviceCollectionChangeCallback) {
+    mInputDeviceCollectionChangeCallback(AsCubebContext(),
+                                         mInputDeviceCollectionChangeUserPtr);
+  }
+  if (!isInput && mOutputDeviceCollectionChangeCallback) {
+    mOutputDeviceCollectionChangeCallback(AsCubebContext(),
+                                          mOutputDeviceCollectionChangeUserPtr);
+  }
+}
+
+bool MockCubeb::RemoveDevice(cubeb_devid aId) {
+  bool foundInput = false;
+  bool foundOutput = false;
+  mInputDevices.RemoveElementsBy(
+      [aId, &foundInput](cubeb_device_info& aDeviceInfo) {
+        bool foundThisTime = aDeviceInfo.devid == aId;
+        foundInput |= foundThisTime;
+        return foundThisTime;
+      });
+  mOutputDevices.RemoveElementsBy(
+      [aId, &foundOutput](cubeb_device_info& aDeviceInfo) {
+        bool foundThisTime = aDeviceInfo.devid == aId;
+        foundOutput |= foundThisTime;
+        return foundThisTime;
+      });
+
+  if (foundInput && mInputDeviceCollectionChangeCallback) {
+    mInputDeviceCollectionChangeCallback(AsCubebContext(),
+                                         mInputDeviceCollectionChangeUserPtr);
+  }
+  if (foundOutput && mOutputDeviceCollectionChangeCallback) {
+    mOutputDeviceCollectionChangeCallback(AsCubebContext(),
+                                          mOutputDeviceCollectionChangeUserPtr);
+  }
+  // If the device removed was a default device, set another device as the
+  // default, if there are still devices available.
+  bool foundDefault = false;
+  for (uint32_t i = 0; i < mInputDevices.Length(); i++) {
+    foundDefault |= mInputDevices[i].preferred != CUBEB_DEVICE_PREF_NONE;
+  }
+
+  if (!foundDefault) {
+    if (!mInputDevices.IsEmpty()) {
+      mInputDevices[mInputDevices.Length() - 1].preferred =
+          CUBEB_DEVICE_PREF_ALL;
+    }
+  }
+
+  foundDefault = false;
+  for (uint32_t i = 0; i < mOutputDevices.Length(); i++) {
+    foundDefault |= mOutputDevices[i].preferred != CUBEB_DEVICE_PREF_NONE;
+  }
+
+  if (!foundDefault) {
+    if (!mOutputDevices.IsEmpty()) {
+      mOutputDevices[mOutputDevices.Length() - 1].preferred =
+          CUBEB_DEVICE_PREF_ALL;
+    }
+  }
+
+  return foundInput | foundOutput;
+}
+
+void MockCubeb::ClearDevices(cubeb_device_type aType) {
+  mInputDevices.Clear();
+  mOutputDevices.Clear();
+}
+
+void MockCubeb::SetSupportDeviceChangeCallback(bool aSupports) {
+  mSupportsDeviceCollectionChangedCallback = aSupports;
+}
+
+void MockCubeb::ForceStreamInitError() { mStreamInitErrorState = true; }
+
+void MockCubeb::SetStreamStartFreezeEnabled(bool aEnabled) {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  mStreamStartFreezeEnabled = aEnabled;
+}
+
+auto MockCubeb::ForceAudioThread() -> RefPtr<ForcedAudioThreadPromise> {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  RefPtr<ForcedAudioThreadPromise> p =
+      mForcedAudioThreadPromise.Ensure(__func__);
+  mForcedAudioThread = true;
+  StartStream(nullptr);
+  return p;
+}
+
+void MockCubeb::UnforceAudioThread() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  mForcedAudioThread = false;
+}
+
+int MockCubeb::StreamInit(cubeb* aContext, cubeb_stream** aStream,
+                          char const* aStreamName, cubeb_devid aInputDevice,
+                          cubeb_stream_params* aInputStreamParams,
+                          cubeb_devid aOutputDevice,
+                          cubeb_stream_params* aOutputStreamParams,
+                          cubeb_data_callback aDataCallback,
+                          cubeb_state_callback aStateCallback, void* aUserPtr) {
+  if (mStreamInitErrorState.compareExchange(true, false)) {
+    mStreamInitEvent.Notify(nullptr);
+    return CUBEB_ERROR_DEVICE_UNAVAILABLE;
+  }
+
+  auto mockStream = MakeRefPtr<SmartMockCubebStream>(
+      aContext, aStreamName, aInputDevice, aInputStreamParams, aOutputDevice,
+      aOutputStreamParams, aDataCallback, aStateCallback, aUserPtr,
+      mRunningMode, mStreamStartFreezeEnabled);
+  *aStream = mockStream->AsCubebStream();
+  mStreamInitEvent.Notify(mockStream);
+  // AddRef the stream to keep it alive. StreamDestroy releases it.
+  Unused << mockStream.forget().take();
+  return CUBEB_OK;
+}
+
+void MockCubeb::StreamDestroy(MockCubebStream* aStream) {
+  RefPtr<SmartMockCubebStream> mockStream = dont_AddRef(aStream->mSelf);
+  mStreamDestroyEvent.Notify(mockStream);
+}
+
+void MockCubeb::GoFaster() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  mFastMode = true;
+}
+
+void MockCubeb::DontGoFaster() {
+  MOZ_ASSERT(mRunningMode == RunningMode::Automatic);
+  mFastMode = false;
+}
+
+MediaEventSource<RefPtr<SmartMockCubebStream>>& MockCubeb::StreamInitEvent() {
+  return mStreamInitEvent;
+}
+
+MediaEventSource<RefPtr<SmartMockCubebStream>>&
+MockCubeb::StreamDestroyEvent() {
+  return mStreamDestroyEvent;
+}
+
+void MockCubeb::StartStream(MockCubebStream* aStream) {
+  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));
+    streams->AppendElement(aStream->mSelf);
+  }
+  if (!mFakeAudioThread && mRunningMode == RunningMode::Automatic) {
+    AddRef();  // released when the thread exits
+    mFakeAudioThread = WrapUnique(new std::thread(ThreadFunction_s, this));
+  }
+}
+
+void MockCubeb::StopStream(MockCubebStream* aStream) {
+  {
+    auto streams = mLiveStreams.Lock();
+    if (!streams->Contains(aStream->mSelf)) {
+      return;
+    }
+    streams->RemoveElement(aStream->mSelf);
+  }
+}
+
+void MockCubeb::ThreadFunction() {
+  MOZ_RELEASE_ASSERT(mRunningMode == RunningMode::Automatic);
+  if (mForcedAudioThread) {
+    mForcedAudioThreadPromise.Resolve(MakeRefPtr<AudioThreadAutoUnforcer>(this),
+                                      __func__);
+  }
+  while (true) {
+    {
+      auto streams = mLiveStreams.Lock();
+      for (auto& stream : *streams) {
+        auto keepProcessing = stream->Process10Ms();
+        if (keepProcessing == KeepProcessing::No) {
+          stream = nullptr;
+        }
+      }
+      streams->RemoveElementsBy([](const auto& stream) { return !stream; });
+      MOZ_ASSERT(mFakeAudioThread);
+      if (streams->IsEmpty() && !mForcedAudioThread) {
+        // This leaks the std::thread if Gecko's main thread has already been
+        // shut down.
+        NS_DispatchToMainThread(NS_NewRunnableFunction(
+            __func__, [audioThread = std::move(mFakeAudioThread)] {
+              audioThread->join();
+            }));
+        break;
+      }
+    }
+    std::this_thread::sleep_for(
+        std::chrono::microseconds(mFastMode ? 0 : 10 * PR_USEC_PER_MSEC));
+  }
+  Release();
+}
+
+}  // namespace mozilla