Chromecast: adds interfaces for hardware layer of CMA pipeline.

chromecast/media/cma/backend/media_pipeline_device.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_BACKEND_MEDIA_PIPELINE_DEVICE_H_
+#define CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace chromecast {
+namespace media {
+class AudioPipelineDevice;
+class MediaClockDevice;
+class MediaPipelineDeviceParams;
+class VideoPipelineDevice;
+
+// MediaPipelineDevice is the owner of the underlying audio/video/clock
+// devices.
+class MediaPipelineDevice {
+ public:
+  MediaPipelineDevice();
+  virtual ~MediaPipelineDevice();
+
+  virtual AudioPipelineDevice* GetAudioPipelineDevice() const = 0;
+
+  virtual VideoPipelineDevice* GetVideoPipelineDevice() const = 0;
+
+  virtual MediaClockDevice* GetMediaClockDevice() const = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaPipelineDevice);
+};
+
+// Factory to create a MediaPipelineDevice.
+scoped_ptr<MediaPipelineDevice> CreateMediaPipelineDevice(
+    const MediaPipelineDeviceParams& params);
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_H_