chromecast/media/cma/backend/audio_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_AUDIO_PIPELINE_DEVICE_H_
   6 #define CHROMECAST_MEDIA_CMA_BACKEND_AUDIO_PIPELINE_DEVICE_H_
   7
   8 #include "base/macros.h"
   9 #include "chromecast/media/cma/backend/media_component_device.h"
  10
  11 namespace media {
  12 class AudioDecoderConfig;
  13 }
  14
  15 namespace chromecast {
  16 namespace media {
  17 class AudioPipelineDeviceClient;
  18
  19 class AudioPipelineDevice : public MediaComponentDevice {
  20  public:
  21   AudioPipelineDevice();
  22   ~AudioPipelineDevice() override;
  23
  24   // Provide the audio configuration.
  25   // Must be called before switching from |kStateUninitialized| to |kStateIdle|.
  26   // Afterwards, this can be invoked any time the configuration changes.
  27   // Returns true if the configuration is a supported configuration.
  28   virtual bool SetConfig(const ::media::AudioDecoderConfig& config) = 0;
  29
  30   // Sets the volume multiplier.
  31   // The multiplier must be in the range [0.0, 1.0].
  32   virtual void SetStreamVolumeMultiplier(float multiplier) = 0;
  33
  34  private:
  35   DISALLOW_COPY_AND_ASSIGN(AudioPipelineDevice);
  36 };
  37
  38 }  // namespace media
  39 }  // namespace chromecast
  40
  41 #endif  // CHROMECAST_MEDIA_CMA_BACKEND_AUDIO_PIPELINE_DEVICE_H_