Implement disabling and enabling media tracks

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 199636d3a32406ea11d0b781622d9346ea816404..f0a4faccb8d607276640003d8d6cedbd758f29b8 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -570,6 +570,35 @@ bool WebMediaPlayerImpl::hasAudio() const {
   return pipeline_metadata_.has_audio;
 }
 
+void WebMediaPlayerImpl::enabledAudioTracksChanged(
+    const blink::WebVector<blink::WebMediaPlayer::TrackId>& enabledTrackIds) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+
+  std::ostringstream logstr;
+  std::vector<MediaTrack::Id> enabledMediaTrackIds;
+  for (const auto& blinkTrackId : enabledTrackIds) {
+    MediaTrack::Id track_id = blinkTrackId.utf8().data();
+    logstr << " " << track_id;
+    enabledMediaTrackIds.push_back(track_id);
+  }
+  DVLOG(1) << __FUNCTION__ << " enabled:" << logstr.str();

[chcunningham, 2016/06/24 23:32:55]

Maybe promote this to a MEDIA_LOG - seems it could be helpful for app debugging.
Would need to drop the __FUNCTION__ and make it more verbose (web-dev friendly).

[servolk, 2016/06/25 00:36:33]

Done.

+  pipeline_.OnEnabledAudioTracksChanged(enabledMediaTrackIds);
+}
+
+void WebMediaPlayerImpl::selectedVideoTrackChanged(
+    blink::WebMediaPlayer::TrackId* selectedTrackId) {
+  DCHECK(main_task_runner_->BelongsToCurrentThread());
+
+  std::ostringstream logstr;
+  std::vector<MediaTrack::Id> selectedVideoMediaTrackId;
+  if (selectedTrackId) {
+    selectedVideoMediaTrackId.push_back(selectedTrackId->utf8().data());
+    logstr << selectedVideoMediaTrackId[0];
+  }
+  DVLOG(1) << __FUNCTION__ << " selected: " << logstr.str();

[chcunningham, 2016/06/24 23:32:55]

Ditto

[servolk, 2016/06/25 00:36:33]

Done.

+  pipeline_.OnSelectedVideoTrackChanged(selectedVideoMediaTrackId);
+}
+
 blink::WebSize WebMediaPlayerImpl::naturalSize() const {
   DCHECK(main_task_runner_->BelongsToCurrentThread());