[Chromecast] Upgrade to new CMA backend API

chromecast/media/cma/adapter/backend_adapter.h

+// Copyright 2015 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_ADAPTER_MEDIA_PIPELINE_BACKEND_ADAPTER_H_
+#define CHROMECAST_MEDIA_CMA_ADAPTER_MEDIA_PIPELINE_BACKEND_ADAPTER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "chromecast/public/media/media_pipeline_backend.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace chromecast {
+namespace media {
+
+class AudioPipelineDevice;
+class MediaClockDevice;
+class MediaPipelineBackendV1;
+class MediaPipelineDeviceParams;
+class VideoPipelineDevice;
+
+// Interface for platform-specific output of media pipeline.
+// A new MediaPipelineBackend will be instantiated for each media player
+// instance.
+class MediaPipelineBackendAdapter : public MediaPipelineBackend {
+ public:
+  MediaPipelineBackendAdapter(const MediaPipelineDeviceParams& params,
+                              scoped_ptr<MediaPipelineBackendV1> backend_v1);
+  ~MediaPipelineBackendAdapter() override;
+
+  AudioDecoder* CreateAudioDecoder() override;
+  VideoDecoder* CreateVideoDecoder() override;
+
+  bool Initialize(Delegate* delegate) override;
+
+  bool Start(int64_t start_pts) override;
+  bool Stop() override;
+
+  bool Pause() override;
+  bool Resume() override;
+
+  int64_t GetCurrentPts() override;
+
+  bool SetPlaybackRate(float rate) override;
+
+  // Callbacks for client/delegate interfaces
+  void OnEndOfAudioStream();
+  void OnEndOfVideoStream();
+  void OnPushBufferComplete(bool video, BufferStatus status);
+  void OnNaturalSizeChanged(const Size& size);
+
+ private:
+  scoped_ptr<MediaPipelineBackendV1> backend_v1_;
+  MediaPipelineBackend::Delegate* delegate_;
+  MediaPipelineBackend::AudioDecoder* audio_decoder_;
+  MediaPipelineBackend::VideoDecoder* video_decoder_;
+
+  MediaClockDevice* const clock_;
+  AudioPipelineDevice* audio_;
+  VideoPipelineDevice* video_;
+
+  bool playing_;
+  float rate_;
+
+  scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
+
+  base::WeakPtrFactory<MediaPipelineBackendAdapter> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPipelineBackendAdapter);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_ADAPTER_MEDIA_PIPELINE_BACKEND_ADAPTER_H_