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 <cras_types.h>
   9
  10 #include <string>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "media/audio/audio_manager_base.h"
  15
  16 namespace media {
  17
  18 class MEDIA_EXPORT AudioManagerCras : public AudioManagerBase {
  19  public:
  20   AudioManagerCras(AudioLogFactory* audio_log_factory);
  21
  22   // AudioManager implementation.
  23   virtual bool HasAudioOutputDevices() override;
  24   virtual bool HasAudioInputDevices() override;
  25   virtual void ShowAudioInputSettings() override;
  26   virtual void GetAudioInputDeviceNames(
  27       AudioDeviceNames* device_names) override;
  28   virtual void GetAudioOutputDeviceNames(
  29       AudioDeviceNames* device_names) override;
  30   virtual AudioParameters GetInputStreamParameters(
  31       const std::string& device_id) override;
  32   virtual void SetHasKeyboardMic() override;
  33
  34   // AudioManagerBase implementation.
  35   virtual AudioOutputStream* MakeLinearOutputStream(
  36       const AudioParameters& params) override;
  37   virtual AudioOutputStream* MakeLowLatencyOutputStream(
  38       const AudioParameters& params,
  39       const std::string& device_id) override;
  40   virtual AudioInputStream* MakeLinearInputStream(
  41       const AudioParameters& params, const std::string& device_id) override;
  42   virtual AudioInputStream* MakeLowLatencyInputStream(
  43       const AudioParameters& params, const std::string& device_id) override;
  44
  45   static snd_pcm_format_t BitsToFormat(int bits_per_sample);
  46
  47  protected:
  48   virtual ~AudioManagerCras();
  49
  50   virtual AudioParameters GetPreferredOutputStreamParameters(
  51       const std::string& output_device_id,
  52       const AudioParameters& input_params) override;
  53
  54  private:
  55   // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
  56   AudioOutputStream* MakeOutputStream(const AudioParameters& params);
  57
  58   // Called by MakeLinearInputStream and MakeLowLatencyInputStream.
  59   AudioInputStream* MakeInputStream(const AudioParameters& params,
  60                                     const std::string& device_id);
  61
  62   bool has_keyboard_mic_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(AudioManagerCras);
  65 };
  66
  67 }  // namespace media
  68
  69 #endif  // MEDIA_AUDIO_CRAS_AUDIO_MANAGER_CRAS_H_