Bug 1238906 - part2 : notify audible state from MDSM to ME. r=jwwang

--HG--
extra : transplant_source : %20hs%E8%9EH%9F%2A3%17%0A%1C%B1%E27%097%29%B5%CF

dom/html/HTMLMediaElement.cpp

@@ -2113,7 +2113,8 @@ HTMLMediaElement::HTMLMediaElement(already_AddRefed<mozilla::dom::NodeInfo>& aNo
     mElementInTreeState(ELEMENT_NOT_INTREE),
     mHasUserInteraction(false),
     mFirstFrameLoaded(false),
-    mDefaultPlaybackStartPosition(0.0)
+    mDefaultPlaybackStartPosition(0.0),
+    mIsAudioTrackAudible(false)
 {
   mAudioChannel = AudioChannelService::GetDefaultAudioChannel();
 
@@ -5169,5 +5170,14 @@ HTMLMediaElement::IsCurrentlyPlaying() const
   return false;
 }
 
+void
+HTMLMediaElement::NotifyAudibleStateChanged(bool aAudible)
+{
+  if (mIsAudioTrackAudible != aAudible) {
+    mIsAudioTrackAudible = aAudible;
+    // To do ...
+  }
+}
+
 } // namespace dom
 } // namespace mozilla

dom/html/HTMLMediaElement.h

@@ -397,6 +397,9 @@ public:
   // when the connection between Rtsp server and client gets lost.
   virtual void ResetConnectionState() final override;
 
+  // Called by media decoder when the audible state changed.
+  virtual void NotifyAudibleStateChanged(bool aAudible) final override;
+
   // XPCOM GetPreload() is OK
   void SetPreload(const nsAString& aValue, ErrorResult& aRv)
   {
@@ -1521,6 +1524,9 @@ private:
   // initially be set to zero seconds. This time is used to allow the element to
   // be seeked even before the media is loaded.
   double mDefaultPlaybackStartPosition;
+
+  // True if the audio track is producing audible sound.
+  bool mIsAudioTrackAudible;
 };
 
 } // namespace dom

dom/media/MediaDecoder.cpp

@@ -532,6 +532,8 @@ MediaDecoder::MediaDecoder(MediaDecoderOwner* aOwner)
                           "MediaDecoder::mStateMachineDuration (Mirror)")
   , mPlaybackPosition(AbstractThread::MainThread(), 0,
                       "MediaDecoder::mPlaybackPosition (Mirror)")
+  , mIsAudioDataAudible(AbstractThread::MainThread(), false,
+                        "MediaDecoder::mIsAudioDataAudible (Mirror)")
   , mVolume(AbstractThread::MainThread(), 0.0,
             "MediaDecoder::mVolume (Canonical)")
   , mPlaybackRate(AbstractThread::MainThread(), 1.0,
@@ -592,6 +594,8 @@ MediaDecoder::MediaDecoder(MediaDecoderOwner* aOwner)
   // mIgnoreProgressData
   mWatchManager.Watch(mLogicallySeeking, &MediaDecoder::SeekingChanged);
 
+  mWatchManager.Watch(mIsAudioDataAudible, &MediaDecoder::NotifyAudibleStateChanged);
+
   MediaShutdownManager::Instance().Register(this);
 }
 
@@ -623,6 +627,8 @@ MediaDecoder::Shutdown()
     mOnSeekingStart.Disconnect();
     mOnMediaNotSeekable.Disconnect();
 
+    mWatchManager.Unwatch(mIsAudioDataAudible, &MediaDecoder::NotifyAudibleStateChanged);
+
     shutdown = mDecoderStateMachine->BeginShutdown()
         ->Then(AbstractThread::MainThread(), __func__, this,
                &MediaDecoder::FinishShutdown,
@@ -1473,6 +1479,7 @@ MediaDecoder::SetStateMachine(MediaDecoderStateMachine* aStateMachine)
     mNextFrameStatus.Connect(mDecoderStateMachine->CanonicalNextFrameStatus());
     mCurrentPosition.Connect(mDecoderStateMachine->CanonicalCurrentPosition());
     mPlaybackPosition.Connect(mDecoderStateMachine->CanonicalPlaybackOffset());
+    mIsAudioDataAudible.Connect(mDecoderStateMachine->CanonicalIsAudioDataAudible());
   } else {
     mStateMachineDuration.DisconnectIfConnected();
     mBuffered.DisconnectIfConnected();
@@ -1480,6 +1487,7 @@ MediaDecoder::SetStateMachine(MediaDecoderStateMachine* aStateMachine)
     mNextFrameStatus.DisconnectIfConnected();
     mCurrentPosition.DisconnectIfConnected();
     mPlaybackPosition.DisconnectIfConnected();
+    mIsAudioDataAudible.DisconnectIfConnected();
   }
 }
 
@@ -1831,6 +1839,13 @@ MediaDecoder::NextFrameBufferedStatus()
     : MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE;
 }
 
+void
+MediaDecoder::NotifyAudibleStateChanged()
+{
+  MOZ_ASSERT(!mShuttingDown);
+  mOwner->NotifyAudibleStateChanged(mIsAudioDataAudible);
+}
+
 MediaMemoryTracker::MediaMemoryTracker()
 {
 }

dom/media/MediaDecoder.h

@@ -773,6 +773,9 @@ protected:
   // start playing back again.
   Mirror<int64_t> mPlaybackPosition;
 
+  // Used to distiguish whether the audio is producing sound.
+  Mirror<bool> mIsAudioDataAudible;
+
   // Volume of playback.  0.0 = muted. 1.0 = full volume.
   Canonical<double> mVolume;
 
@@ -868,6 +871,9 @@ public:
   }
 
 private:
+  // Notify owner when the audible state changed
+  void NotifyAudibleStateChanged();
+
   /* Functions called by ResourceCallback */
 
   // A media stream is assumed to be infinite if the metadata doesn't

dom/media/MediaDecoderOwner.h

@@ -130,6 +130,9 @@ public:
   // when the connection between Rtsp server and client gets lost.
   virtual void ResetConnectionState() = 0;
 
+  // Called by media decoder when the audible state changed
+  virtual void NotifyAudibleStateChanged(bool aAudible) = 0;
+
 #ifdef MOZ_EME
   // Dispatches a "encrypted" event to the HTMLMediaElement, with the
   // provided init data. Actual dispatch may be delayed until HAVE_METADATA.

dom/media/MediaDecoderStateMachine.cpp

@@ -241,7 +241,6 @@ MediaDecoderStateMachine::MediaDecoderStateMachine(MediaDecoder* aDecoder,
   mOutputStreamManager(new OutputStreamManager()),
   mResource(aDecoder->GetResource()),
   mAudioOffloading(false),
-  mIsAudioDataAudible(false),
   mSilentDataDuration(0),
   mBuffered(mTaskQueue, TimeIntervals(),
             "MediaDecoderStateMachine::mBuffered (Mirror)"),
@@ -279,7 +278,9 @@ MediaDecoderStateMachine::MediaDecoderStateMachine(MediaDecoder* aDecoder,
   mCurrentPosition(mTaskQueue, 0,
                    "MediaDecoderStateMachine::mCurrentPosition (Canonical)"),
   mPlaybackOffset(mTaskQueue, 0,
-                  "MediaDecoderStateMachine::mPlaybackOffset (Canonical)")
+                  "MediaDecoderStateMachine::mPlaybackOffset (Canonical)"),
+  mIsAudioDataAudible(mTaskQueue, false,
+                     "MediaDecoderStateMachine::mIsAudioDataAudible (Canonical)")
 {
   MOZ_COUNT_CTOR(MediaDecoderStateMachine);
   NS_ASSERTION(NS_IsMainThread(), "Should be on main thread.");
@@ -2197,6 +2198,7 @@ MediaDecoderStateMachine::FinishShutdown()
   mNextFrameStatus.DisconnectAll();
   mCurrentPosition.DisconnectAll();
   mPlaybackOffset.DisconnectAll();
+  mIsAudioDataAudible.DisconnectAll();
 
   // Shut down the watch manager before shutting down our task queue.
   mWatchManager.Shutdown();

dom/media/MediaDecoderStateMachine.h

@@ -1196,8 +1196,7 @@ private:
   // Playback will not start when audio is offloading.
   bool mAudioOffloading;
 
-  // Used to distiguish continuous silent audio data.
-  bool mIsAudioDataAudible;
+  // Duration of the continuous silent data.
   uint32_t mSilentDataDuration;
 
 #ifdef MOZ_EME
@@ -1268,6 +1267,9 @@ private:
   // Current playback position in the stream in bytes.
   Canonical<int64_t> mPlaybackOffset;
 
+  // Used to distiguish whether the audio is producing sound.
+  Canonical<bool> mIsAudioDataAudible;
+
 public:
   AbstractCanonical<media::TimeIntervals>* CanonicalBuffered() {
     return mReader->CanonicalBuffered();
@@ -1287,6 +1289,9 @@ public:
   AbstractCanonical<int64_t>* CanonicalPlaybackOffset() {
     return &mPlaybackOffset;
   }
+  AbstractCanonical<bool>* CanonicalIsAudioDataAudible() {
+    return &mIsAudioDataAudible;
+  }
 };
 
 } // namespace mozilla

dom/media/gtest/MockMediaDecoderOwner.h

@@ -47,6 +47,7 @@ public:
     return nullptr;
   }
   virtual void ResetConnectionState() override {}
+  virtual void NotifyAudibleStateChanged(bool aAudible) override {};
 };
 }