Bug 1294605 - Notify MediaStreamTrackSource when ReadyState is overriden. r=jib

MozReview-Commit-ID: CSRWgYt4hqe

dom/media/MediaStreamTrack.cpp

@@ -387,6 +387,22 @@ MediaStreamTrack::Clone()
   return newStream->CloneDOMTrack(*this, mTrackID);
 }
 
+void
+MediaStreamTrack::SetReadyState(MediaStreamTrackState aState)
+{
+  MOZ_ASSERT(!(mReadyState == MediaStreamTrackState::Ended &&
+               aState == MediaStreamTrackState::Live),
+             "We don't support overriding the ready state from ended to live");
+
+  if (mReadyState == MediaStreamTrackState::Live &&
+      aState == MediaStreamTrackState::Ended &&
+      mSource) {
+    mSource->UnregisterSink(this);
+  }
+
+  mReadyState = aState;
+}
+
 void
 MediaStreamTrack::NotifyEnded()
 {

dom/media/MediaStreamTrack.h

@@ -297,7 +297,7 @@ public:
    * Forces the ready state to a particular value, for instance when we're
    * cloning an already ended track.
    */
-  void SetReadyState(MediaStreamTrackState aState) { mReadyState = aState; }
+  void SetReadyState(MediaStreamTrackState aState);
 
   /**
    * Notified by the MediaStreamGraph, through our owning MediaStream on the