chromecast/public/media/media_pipeline_backend.h

   1 // Copyright 2015 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_PUBLIC_MEDIA_MEDIA_PIPELINE_BACKEND_H_
   6 #define CHROMECAST_PUBLIC_MEDIA_MEDIA_PIPELINE_BACKEND_H_
   7
   8 namespace chromecast {
   9 namespace media {
  10
  11 class AudioPipelineDevice;
  12 class MediaClockDevice;
  13 struct MediaPipelineDeviceParams;
  14 class VideoPipelineDevice;
  15
  16 // Interface for creating and managing ownership of platform-specific clock,
  17 // audio and video devices.  cast_shell owns the MediaPipelineBackend for
  18 // as long as it is needed; the implementation is responsible for
  19 // tearing down the individual components correctly when it is destroyed.
  20 // A new MediaPipelineBackend will be instantiated for each media player
  21 // instance.
  22 class MediaPipelineBackend {
  23  public:
  24   virtual ~MediaPipelineBackend() {}
  25
  26   // Returns the platform-specific pipeline clock.
  27   virtual MediaClockDevice* GetClock() = 0;
  28
  29   // Returns the platform-specific audio backend.
  30   virtual AudioPipelineDevice* GetAudio() = 0;
  31
  32   // Returns the platform-specific video backend.
  33   virtual VideoPipelineDevice* GetVideo() = 0;
  34 };
  35
  36 }  // namespace media
  37 }  // namespace chromecast
  38
  39 #endif  // CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_DEVICE_FACTORY_H_