Implement disabling and enabling media tracks

media/mojo/services/mojo_demuxer_stream_adapter.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_demuxer_stream_adapter.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 52 matching lines @@
 
 bool MojoDemuxerStreamAdapter::SupportsConfigChanges() {
   return true;
 }
 
 VideoRotation MojoDemuxerStreamAdapter::video_rotation() {
   NOTIMPLEMENTED();
   return VIDEO_ROTATION_0;
 }
 
+#if DCHECK_IS_ON()
+void DcheckRemoteEnabledValue(bool local_enabled_value,
+                              bool remote_enabled_value) {
+  DCHECK_EQ(local_enabled_value, remote_enabled_value);
+}
+#endif
+
+bool MojoDemuxerStreamAdapter::enabled() const {
+#if DCHECK_IS_ON()
+  // TODO(servolk): Is it worth waiting for the IPC call roundtrip, when we can
+  // just maintain the current |enabled_| status in here. Would this cause any
+  // problems?
+  demuxer_stream_->enabled(base::Bind(&DcheckRemoteEnabledValue, enabled_));
+#endif
+  return enabled_;
+}
+
+void MojoDemuxerStreamAdapter::set_enabled(bool enabled,
+                                           base::TimeDelta timestamp) {
+  demuxer_stream_->set_enabled(enabled, timestamp.InMicroseconds());
+  enabled_ = enabled;
+}
+
 // TODO(xhwang): Pass liveness here.
 void MojoDemuxerStreamAdapter::OnStreamReady(
     mojom::DemuxerStream::Type type,
     mojo::ScopedDataPipeConsumerHandle pipe,
     mojom::AudioDecoderConfigPtr audio_config,
     mojom::VideoDecoderConfigPtr video_config) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(pipe.is_valid());
   DCHECK_EQ(DemuxerStream::UNKNOWN, type_);
 
@@ skipping 65 matching lines @@
     case DemuxerStream::VIDEO:
       DCHECK(video_config && !audio_config);
       video_config_ = video_config.To<VideoDecoderConfig>();
       break;
     default:
       NOTREACHED();
   }
 }
 
 }  // namespace media