[Chromecast] Upgrade to new CMA backend API

chromecast/media/cma/pipeline/audio_pipeline_impl.h

 // 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.
 
 #ifndef CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_
 #define CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chromecast/media/cma/pipeline/audio_pipeline.h"
 #include "chromecast/media/cma/pipeline/av_pipeline_client.h"
+#include "chromecast/public/media/media_pipeline_backend.h"
 #include "chromecast/public/media/stream_id.h"
 
 namespace media {
 class AudioDecoderConfig;
 class VideoDecoderConfig;
 }
 
 namespace chromecast {
 namespace media {
-class AudioPipelineDevice;
 class AvPipelineImpl;
 class BrowserCdmCast;
 class BufferingState;
 class CodedFrameProvider;
 
-class AudioPipelineImpl : public AudioPipeline {
+class AudioPipelineImpl {
  public:
-  // |buffering_controller| can be NULL.
-  explicit AudioPipelineImpl(AudioPipelineDevice* audio_device);
-  ~AudioPipelineImpl() override;
+  AudioPipelineImpl(MediaPipelineBackend::AudioDecoder* decoder,
+                    const BrowserAvPipelineClient& client);
+  ~AudioPipelineImpl();
 
   // Input port of the pipeline.
   void SetCodedFrameProvider(scoped_ptr<CodedFrameProvider> frame_provider);
 
   // Provide the CDM to use to decrypt samples.
   void SetCdm(BrowserCdmCast* media_keys);
 
   // Functions to control the state of the audio pipeline.
   void Initialize(
       const ::media::AudioDecoderConfig& config,
       scoped_ptr<CodedFrameProvider> frame_provider,
       const ::media::PipelineStatusCB& status_cb);
   bool StartPlayingFrom(base::TimeDelta time,
                         const scoped_refptr<BufferingState>& buffering_state);
   void Flush(const ::media::PipelineStatusCB& status_cb);
   void Stop();
 
   // Update the playback statistics for this audio stream.
   void UpdateStatistics();
 
-  // AudioPipeline implementation.
-  void SetClient(const AvPipelineClient& client) override;
-  void SetVolume(float volume) override;
+  void SetVolume(float volume);
+
+  void OnBufferPushed(MediaPipelineBackend::BufferStatus status);
+  void OnEndOfStream();
+  void OnError();
 
  private:
   void OnFlushDone(const ::media::PipelineStatusCB& status_cb);
   void OnUpdateConfig(StreamId id,
                       const ::media::AudioDecoderConfig& audio_config,
                       const ::media::VideoDecoderConfig& video_config);
 
-  AudioPipelineDevice* audio_device_;
+  MediaPipelineBackend::AudioDecoder* decoder_;
 
   scoped_ptr<AvPipelineImpl> av_pipeline_impl_;
-  AvPipelineClient audio_client_;
+  BrowserAvPipelineClient audio_client_;
 
   ::media::PipelineStatistics previous_stats_;
 
   base::WeakPtr<AudioPipelineImpl> weak_this_;
   base::WeakPtrFactory<AudioPipelineImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPipelineImpl);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_