media/audio/cras/audio_manager_cras.h

   1 // Copyright 2013 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 MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
   6 #define MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "media/audio/audio_manager_base.h"
  13
  14 namespace media {
  15
  16 class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
  17  public:
  18   AudioManagerCras();
  19
  20   // AudioManager implementation.
  21   virtual bool HasAudioOutputDevices() OVERRIDE;
  22   virtual bool HasAudioInputDevices() OVERRIDE;
  23   virtual void ShowAudioInputSettings() OVERRIDE;
  24   virtual void GetAudioInputDeviceNames(media::AudioDeviceNames* device_names)
  25       OVERRIDE;
  26   virtual AudioParameters GetInputStreamParameters(
  27       const std::string& device_id) OVERRIDE;
  28
  29   // AudioManagerBase implementation.
  30   virtual AudioOutputStream* MakeLinearOutputStream(
  31       const AudioParameters& params) OVERRIDE;
  32   virtual AudioOutputStream* MakeLowLatencyOutputStream(
  33       const AudioParameters& params) OVERRIDE;
  34   virtual AudioInputStream* MakeLinearInputStream(
  35       const AudioParameters& params, const std::string& device_id) OVERRIDE;
  36   virtual AudioInputStream* MakeLowLatencyInputStream(
  37       const AudioParameters& params, const std::string& device_id) OVERRIDE;
  38
  39  protected:
  40   virtual ~AudioManagerCras();
  41
  42   virtual AudioParameters GetPreferredOutputStreamParameters(
  43       const AudioParameters& input_params) OVERRIDE;
  44
  45  private:
  46   // Gets a list of available cras input devices.
  47   void GetCrasAudioInputDevices(media::AudioDeviceNames* device_names);
  48
  49   // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
  50   AudioOutputStream* MakeOutputStream(const AudioParameters& params);
  51
  52   // Called by MakeLinearInputStream and MakeLowLatencyInputStream.
  53   AudioInputStream* MakeInputStream(const AudioParameters& params,
  54                                     const std::string& device_id);
  55
  56   DISALLOW_COPY_AND_ASSIGN(AudioManagerCras);
  57 };
  58
  59 }  // namespace media
  60
  61 #endif  // MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_