chromecast/media/cma/backend/media_pipeline_device.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_H_
   6 #define CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_H_
   7
   8 #include "base/callback.h"
   9 #include "base/macros.h"
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace chromecast {
  13 namespace media {
  14 class AudioPipelineDevice;
  15 class MediaClockDevice;
  16 class MediaPipelineDeviceFactory;
  17 class MediaPipelineDeviceParams;
  18 class VideoPipelineDevice;
  19
  20 // MediaPipelineDevice is the owner of the underlying audio/video/clock
  21 // devices.  It ensures that the clock outlives the audio and video devices, so
  22 // it is safe for them to reference the clock with a raw pointer.
  23 class MediaPipelineDevice {
  24  public:
  25   // Constructs object using clock, audio, video created by given factory.
  26   explicit MediaPipelineDevice(scoped_ptr<MediaPipelineDeviceFactory> factory);
  27
  28   // Constructs explicitly from separate clock, audio, video elements
  29   MediaPipelineDevice(scoped_ptr<MediaClockDevice> media_clock_device,
  30                       scoped_ptr<AudioPipelineDevice> audio_pipeline_device,
  31                       scoped_ptr<VideoPipelineDevice> video_pipeline_device);
  32   ~MediaPipelineDevice();
  33
  34   AudioPipelineDevice* GetAudioPipelineDevice() const {
  35     return audio_pipeline_device_.get();
  36   }
  37   VideoPipelineDevice* GetVideoPipelineDevice() const {
  38     return video_pipeline_device_.get();
  39   }
  40   MediaClockDevice* GetMediaClockDevice() const {
  41     return media_clock_device_.get();
  42   }
  43
  44  private:
  45   scoped_ptr<MediaClockDevice> media_clock_device_;
  46   scoped_ptr<AudioPipelineDevice> audio_pipeline_device_;
  47   scoped_ptr<VideoPipelineDevice> video_pipeline_device_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(MediaPipelineDevice);
  50 };
  51
  52 // Factory method to create a MediaPipelineDevice.
  53 typedef base::Callback<scoped_ptr<MediaPipelineDevice>(
  54     const MediaPipelineDeviceParams&)> CreatePipelineDeviceCB;
  55
  56 }  // namespace media
  57 }  // namespace chromecast
  58
  59 #endif  // CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_H_