Implement disabling and enabling media tracks

media/mojo/services/mojo_renderer_service.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/mojo/services/mojo_renderer_service.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "media/base/media_keys.h"
@@ skipping 50 matching lines @@
       base::Bind(&MojoRendererService::OnFlushCompleted, weak_this_, callback));
 }
 
 void MojoRendererService::StartPlayingFrom(int64_t time_delta_usec) {
   DVLOG(2) << __FUNCTION__ << ": " << time_delta_usec;
   renderer_->StartPlayingFrom(
       base::TimeDelta::FromMicroseconds(time_delta_usec));
   SchedulePeriodicMediaTimeUpdates();
 }
 
+void MojoRendererService::RestartStreamPlayback(bool video_stream,
+                                                int64_t time_delta_usec) {
+  DemuxerStream* demuxer_stream = nullptr;
+
+  if (video_stream)
+    demuxer_stream = stream_provider_->GetStream(DemuxerStream::VIDEO);
+  else
+    demuxer_stream = stream_provider_->GetStream(DemuxerStream::AUDIO);
+
+  DVLOG(2) << __FUNCTION__ << ": demuxer_stream=" << demuxer_stream
+           << " time=" << time_delta_usec;
+  renderer_->RestartStreamPlayback(
+      demuxer_stream, base::TimeDelta::FromMicroseconds(time_delta_usec));
+}
+
 void MojoRendererService::SetPlaybackRate(double playback_rate) {
   DVLOG(2) << __FUNCTION__ << ": " << playback_rate;
   DCHECK_EQ(state_, STATE_PLAYING);
   renderer_->SetPlaybackRate(playback_rate);
 }
 
 void MojoRendererService::SetVolume(float volume) {
   renderer_->SetVolume(volume);
 }
 
@@ skipping 121 matching lines @@
     bool success) {
   DVLOG(1) << __FUNCTION__ << "(" << success << ")";
 
   if (success)
     cdm_ = cdm;
 
   callback.Run(success);
 }
 
 }  // namespace media