Bug 1050060 - Update index off main thread; r=edwin

content/media/fmp4/MP4Reader.cpp

@@ -744,6 +744,18 @@ MP4Reader::Seek(int64_t aTime,
 void
 MP4Reader::NotifyDataArrived(const char* aBuffer, uint32_t aLength,
                              int64_t aOffset)
+{
+  if (NS_IsMainThread()) {
+    MediaTaskQueue* queue =
+      mAudio.mTaskQueue ? mAudio.mTaskQueue : mVideo.mTaskQueue;
+    queue->Dispatch(NS_NewRunnableMethod(this, &MP4Reader::UpdateIndex));
+  } else {
+    UpdateIndex();
+  }
+}
+
+void
+MP4Reader::UpdateIndex()
 {
   nsTArray<MediaByteRange> ranges;
   if (NS_FAILED(mDecoder->GetResource()->GetCachedRanges(ranges))) {

content/media/fmp4/MP4Reader.h

@@ -86,6 +86,7 @@ private:
   bool Decode(mp4_demuxer::TrackType aTrack);
   void Flush(mp4_demuxer::TrackType aTrack);
   void DrainComplete(mp4_demuxer::TrackType aTrack);
+  void UpdateIndex();
   void NotifyResourcesStatusChanged();
   bool IsWaitingOnCodecResource();
   bool IsWaitingOnCDMResource();