audio_manager_cras.h revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
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
16namespace media {
17
18class 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_
70