Switching audio clients to using RestartableAudioRendererSink interface as a sink.

content/renderer/media/track_audio_renderer.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_
 #define CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/media_stream_audio_renderer.h"
 #include "content/public/renderer/media_stream_audio_sink.h"
 #include "media/base/audio_renderer_sink.h"
 #include "media/base/output_device.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace media {
 class AudioBus;
 class AudioShifter;
-class AudioOutputDevice;
 class AudioParameters;
 }
 
 namespace content {
 
 // TrackAudioRenderer is a MediaStreamAudioRenderer for plumbing audio data
 // generated from either local or remote (but not PeerConnection/WebRTC-sourced)
 // MediaStreamAudioTracks to an audio output device, reconciling differences in
 // the rates of production and consumption of the audio data.  Note that remote
 // PeerConnection-sourced tracks are NOT rendered by this implementation (see
 // MediaStreamRendererFactoryImpl).
 //
-// This class uses AudioDeviceFactory to create media::AudioOutputDevices and
+// This class uses AudioDeviceFactory to create media::AudioRendererSink and
 // owns/manages their lifecycles.  Output devices are automatically re-created
 // in response to audio format changes, or use of the SwitchOutputDevice() API
 // by client code.
 //
 // Audio data is feed-in from the source via calls to OnData().  The
 // internally-owned media::AudioOutputDevice calls Render() to pull-out that
 // audio data.  However, because of clock differences and other environmental
 // factors, the audio will inevitably feed-in at a rate different from the rate
 // it is being rendered-out.  media::AudioShifter is used to buffer, stretch
 // and skip audio to maintain time synchronization between the producer and
@@ skipping 83 matching lines @@
 
   // The render view and frame in which the audio is rendered into |sink_|.
   const int playout_render_frame_id_;
   const int session_id_;
 
   // MessageLoop associated with the single thread that performs all control
   // tasks.  Set to the MessageLoop that invoked the ctor.
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   // The sink (destination) for rendered audio.
-  scoped_refptr<media::AudioOutputDevice> sink_;
+  scoped_refptr<media::AudioRendererSink> sink_;
 
   // This does all the synchronization/resampling/smoothing.
   scoped_ptr<media::AudioShifter> audio_shifter_;
 
   // These track the time duration of all the audio rendered so far by this
   // instance.  |prior_elapsed_render_time_| tracks the time duration of all
   // audio rendered before the last format change.  |num_samples_rendered_|
   // tracks the number of audio samples rendered since the last format change.
   base::TimeDelta prior_elapsed_render_time_;
   int64_t num_samples_rendered_;
@@ skipping 23 matching lines @@
 
   // Used to DCHECK that some methods are called on the audio thread.
   base::ThreadChecker audio_thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(TrackAudioRenderer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_TRACK_AUDIO_RENDERER_H_