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