1 files changed, 312 insertions, 0 deletions
diff --git a/dom/media/hls/HLSDecoder.cpp b/dom/media/hls/HLSDecoder.cpp
new file mode 100644
index 0000000000..a992f52f71
--- /dev/null
+++ b/dom/media/hls/HLSDecoder.cpp
@@ -0,0 +1,312 @@
+/* -*- 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 "HLSDecoder.h"
+#include "AndroidBridge.h"
+#include "base/process_util.h"
+#include "DecoderTraits.h"
+#include "HLSDemuxer.h"
+#include "HLSUtils.h"
+#include "JavaBuiltins.h"
+#include "MediaContainerType.h"
+#include "MediaDecoderStateMachine.h"
+#include "MediaFormatReader.h"
+#include "MediaShutdownManager.h"
+#include "mozilla/java/GeckoHLSResourceWrapperNatives.h"
+#include "nsContentUtils.h"
+#include "nsIChannel.h"
+#include "nsNetUtil.h"
+#include "nsThreadUtils.h"
+#include "mozilla/dom/HTMLMediaElement.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/StaticPrefs_media.h"
+
+namespace mozilla {
+
+class HLSResourceCallbacksSupport
+    : public java::GeckoHLSResourceWrapper::Callbacks::Natives<
+          HLSResourceCallbacksSupport> {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(HLSResourceCallbacksSupport)
+ public:
+  typedef java::GeckoHLSResourceWrapper::Callbacks::Natives<
+      HLSResourceCallbacksSupport>
+      NativeCallbacks;
+  using NativeCallbacks::AttachNative;
+  using NativeCallbacks::DisposeNative;
+
+  explicit HLSResourceCallbacksSupport(HLSDecoder* aResource);
+  void Detach();
+  void OnLoad(jni::String::Param aUrl);
+  void OnDataArrived();
+  void OnError(int aErrorCode);
+
+ private:
+  ~HLSResourceCallbacksSupport() {}
+  Mutex mMutex MOZ_UNANNOTATED;
+  HLSDecoder* mDecoder;
+};
+
+HLSResourceCallbacksSupport::HLSResourceCallbacksSupport(HLSDecoder* aDecoder)
+    : mMutex("HLSResourceCallbacksSupport"), mDecoder(aDecoder) {
+  MOZ_ASSERT(mDecoder);
+}
+
+void HLSResourceCallbacksSupport::Detach() {
+  MOZ_ASSERT(NS_IsMainThread());
+  MutexAutoLock lock(mMutex);
+  mDecoder = nullptr;
+}
+
+void HLSResourceCallbacksSupport::OnLoad(jni::String::Param aUrl) {
+  MutexAutoLock lock(mMutex);
+  if (!mDecoder) {
+    return;
+  }
+  RefPtr<HLSResourceCallbacksSupport> self = this;
+  jni::String::GlobalRef url = std::move(aUrl);
+  NS_DispatchToMainThread(NS_NewRunnableFunction(
+      "HLSResourceCallbacksSupport::OnLoad", [self, url]() -> void {
+        if (self->mDecoder) {
+          self->mDecoder->NotifyLoad(url->ToCString());
+        }
+      }));
+}
+
+void HLSResourceCallbacksSupport::OnDataArrived() {
+  HLS_DEBUG("HLSResourceCallbacksSupport", "OnDataArrived.");
+  MutexAutoLock lock(mMutex);
+  if (!mDecoder) {
+    return;
+  }
+  RefPtr<HLSResourceCallbacksSupport> self = this;
+  NS_DispatchToMainThread(NS_NewRunnableFunction(
+      "HLSResourceCallbacksSupport::OnDataArrived", [self]() -> void {
+        if (self->mDecoder) {
+          self->mDecoder->NotifyDataArrived();
+        }
+      }));
+}
+
+void HLSResourceCallbacksSupport::OnError(int aErrorCode) {
+  HLS_DEBUG("HLSResourceCallbacksSupport", "onError(%d)", aErrorCode);
+  MutexAutoLock lock(mMutex);
+  if (!mDecoder) {
+    return;
+  }
+  RefPtr<HLSResourceCallbacksSupport> self = this;
+  NS_DispatchToMainThread(NS_NewRunnableFunction(
+      "HLSResourceCallbacksSupport::OnError", [self]() -> void {
+        if (self->mDecoder) {
+          // Since HLS source should be from the Internet, we treat all resource
+          // errors from GeckoHlsPlayer as network errors.
+          self->mDecoder->NetworkError(
+              MediaResult(NS_ERROR_FAILURE, "HLS error"));
+        }
+      }));
+}
+
+size_t HLSDecoder::sAllocatedInstances = 0;
+
+// static
+RefPtr<HLSDecoder> HLSDecoder::Create(MediaDecoderInit& aInit) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  return sAllocatedInstances < StaticPrefs::media_hls_max_allocations()
+             ? new HLSDecoder(aInit)
+             : nullptr;
+}
+
+HLSDecoder::HLSDecoder(MediaDecoderInit& aInit) : MediaDecoder(aInit) {
+  MOZ_ASSERT(NS_IsMainThread());
+  sAllocatedInstances++;
+  HLS_DEBUG("HLSDecoder", "HLSDecoder(): allocated=%zu", sAllocatedInstances);
+}
+
+HLSDecoder::~HLSDecoder() {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(sAllocatedInstances > 0);
+  sAllocatedInstances--;
+  HLS_DEBUG("HLSDecoder", "~HLSDecoder(): allocated=%zu", sAllocatedInstances);
+}
+
+MediaDecoderStateMachineBase* HLSDecoder::CreateStateMachine(
+    bool aDisableExternalEngine) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  MediaFormatReaderInit init;
+  init.mVideoFrameContainer = GetVideoFrameContainer();
+  init.mKnowsCompositor = GetCompositor();
+  init.mCrashHelper = GetOwner()->CreateGMPCrashHelper();
+  init.mFrameStats = mFrameStats;
+  init.mMediaDecoderOwnerID = mOwner;
+  static Atomic<uint32_t> sTrackingIdCounter(0);
+  init.mTrackingId =
+      Some(TrackingId(TrackingId::Source::HLSDecoder, sTrackingIdCounter++,
+                      TrackingId::TrackAcrossProcesses::Yes));
+  mReader = new MediaFormatReader(
+      init, new HLSDemuxer(mHLSResourceWrapper->GetPlayerId()));
+
+  return new MediaDecoderStateMachine(this, mReader);
+}
+
+bool HLSDecoder::IsEnabled() {
+  return StaticPrefs::media_hls_enabled() && (jni::GetAPIVersion() >= 16);
+}
+
+bool HLSDecoder::IsSupportedType(const MediaContainerType& aContainerType) {
+  return IsEnabled() && DecoderTraits::IsHttpLiveStreamingType(aContainerType);
+}
+
+nsresult HLSDecoder::Load(nsIChannel* aChannel) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(mURI));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  mChannel = aChannel;
+  nsCString spec;
+  Unused << mURI->GetSpec(spec);
+  ;
+  HLSResourceCallbacksSupport::Init();
+  mJavaCallbacks = java::GeckoHLSResourceWrapper::Callbacks::New();
+  mCallbackSupport = new HLSResourceCallbacksSupport(this);
+  HLSResourceCallbacksSupport::AttachNative(mJavaCallbacks, mCallbackSupport);
+  mHLSResourceWrapper = java::GeckoHLSResourceWrapper::Create(
+      NS_ConvertUTF8toUTF16(spec), mJavaCallbacks);
+  MOZ_ASSERT(mHLSResourceWrapper);
+
+  rv = MediaShutdownManager::Instance().Register(this);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+  return CreateAndInitStateMachine(false);
+}
+
+void HLSDecoder::AddSizeOfResources(ResourceSizes* aSizes) {
+  MOZ_ASSERT(NS_IsMainThread());
+  // TODO: track JAVA wrappers.
+}
+
+already_AddRefed<nsIPrincipal> HLSDecoder::GetCurrentPrincipal() {
+  MOZ_ASSERT(NS_IsMainThread());
+  return do_AddRef(mContentPrincipal);
+}
+
+bool HLSDecoder::HadCrossOriginRedirects() {
+  MOZ_ASSERT(NS_IsMainThread());
+  // Bug 1478843
+  return false;
+}
+
+void HLSDecoder::Play() {
+  MOZ_ASSERT(NS_IsMainThread());
+  HLS_DEBUG("HLSDecoder", "MediaElement called Play");
+  mHLSResourceWrapper->Play();
+  return MediaDecoder::Play();
+}
+
+void HLSDecoder::Pause() {
+  MOZ_ASSERT(NS_IsMainThread());
+  HLS_DEBUG("HLSDecoder", "MediaElement called Pause");
+  mHLSResourceWrapper->Pause();
+  return MediaDecoder::Pause();
+}
+
+void HLSDecoder::Suspend() {
+  MOZ_ASSERT(NS_IsMainThread());
+  HLS_DEBUG("HLSDecoder", "Should suspend the resource fetching.");
+  mHLSResourceWrapper->Suspend();
+}
+
+void HLSDecoder::Resume() {
+  MOZ_ASSERT(NS_IsMainThread());
+  HLS_DEBUG("HLSDecoder", "Should resume the resource fetching.");
+  mHLSResourceWrapper->Resume();
+}
+
+void HLSDecoder::Shutdown() {
+  HLS_DEBUG("HLSDecoder", "Shutdown");
+  if (mCallbackSupport) {
+    mCallbackSupport->Detach();
+  }
+  if (mHLSResourceWrapper) {
+    mHLSResourceWrapper->Destroy();
+    mHLSResourceWrapper = nullptr;
+  }
+  if (mJavaCallbacks) {
+    HLSResourceCallbacksSupport::DisposeNative(mJavaCallbacks);
+    mJavaCallbacks = nullptr;
+  }
+  MediaDecoder::Shutdown();
+}
+
+void HLSDecoder::NotifyDataArrived() {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_DIAGNOSTIC_ASSERT(!IsShutdown());
+  NotifyReaderDataArrived();
+  GetOwner()->DownloadProgressed();
+}
+
+void HLSDecoder::NotifyLoad(nsCString aMediaUrl) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_DIAGNOSTIC_ASSERT(!IsShutdown());
+  UpdateCurrentPrincipal(aMediaUrl);
+}
+
+// Should be called when the decoder loads media from a URL to ensure the
+// principal of the media element is appropriately set for CORS.
+void HLSDecoder::UpdateCurrentPrincipal(nsCString aMediaUrl) {
+  nsCOMPtr<nsIPrincipal> principal = GetContentPrincipal(aMediaUrl);
+  MOZ_DIAGNOSTIC_ASSERT(principal);
+
+  // Check the subsumption of old and new principals. Should be either
+  // equal or disjoint.
+  if (!mContentPrincipal) {
+    mContentPrincipal = principal;
+  } else if (principal->Equals(mContentPrincipal)) {
+    return;
+  } else if (!principal->Subsumes(mContentPrincipal) &&
+             !mContentPrincipal->Subsumes(principal)) {
+    // Principals are disjoint -- no access.
+    mContentPrincipal = NullPrincipal::Create(OriginAttributes());
+  } else {
+    MOZ_DIAGNOSTIC_ASSERT(false, "non-equal principals should be disjoint");
+    mContentPrincipal = nullptr;
+  }
+  MediaDecoder::NotifyPrincipalChanged();
+}
+
+already_AddRefed<nsIPrincipal> HLSDecoder::GetContentPrincipal(
+    nsCString aMediaUrl) {
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), aMediaUrl.Data());
+  NS_ENSURE_SUCCESS(rv, nullptr);
+  RefPtr<dom::HTMLMediaElement> element = GetOwner()->GetMediaElement();
+  NS_ENSURE_SUCCESS(rv, nullptr);
+  nsSecurityFlags securityFlags =
+      element->ShouldCheckAllowOrigin()
+          ? nsILoadInfo::SEC_REQUIRE_CORS_INHERITS_SEC_CONTEXT
+          : nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT;
+  if (element->GetCORSMode() == CORS_USE_CREDENTIALS) {
+    securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
+  }
+  nsCOMPtr<nsIChannel> channel;
+  rv = NS_NewChannel(getter_AddRefs(channel), uri,
+                     static_cast<dom::Element*>(element), securityFlags,
+                     nsIContentPolicy::TYPE_INTERNAL_VIDEO);
+  NS_ENSURE_SUCCESS(rv, nullptr);
+  nsCOMPtr<nsIPrincipal> principal;
+  nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
+  if (!secMan) {
+    return nullptr;
+  }
+  secMan->GetChannelResultPrincipal(channel, getter_AddRefs(principal));
+  return principal.forget();
+}
+
+}  // namespace mozilla