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.
5 #ifndef MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_
6 #define MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_
9 #include "base/compiler_specific.h"
10 #include "base/memory/ref_counted.h"
11 #include "base/threading/thread.h"
12 #include "media/audio/audio_manager_base.h"
18 class MEDIA_EXPORT AudioManagerAlsa : public AudioManagerBase {
20 AudioManagerAlsa(AudioLogFactory* audio_log_factory);
22 static void ShowLinuxAudioInputSettings();
24 // Implementation of AudioManager.
25 virtual bool HasAudioOutputDevices() OVERRIDE;
26 virtual bool HasAudioInputDevices() OVERRIDE;
27 virtual void ShowAudioInputSettings() OVERRIDE;
28 virtual void GetAudioInputDeviceNames(
29 AudioDeviceNames* device_names) OVERRIDE;
30 virtual void GetAudioOutputDeviceNames(
31 AudioDeviceNames* device_names) OVERRIDE;
32 virtual AudioParameters GetInputStreamParameters(
33 const std::string& device_id) OVERRIDE;
35 // Implementation of AudioManagerBase.
36 virtual AudioOutputStream* MakeLinearOutputStream(
37 const AudioParameters& params) OVERRIDE;
38 virtual AudioOutputStream* MakeLowLatencyOutputStream(
39 const AudioParameters& params,
40 const std::string& device_id) OVERRIDE;
41 virtual AudioInputStream* MakeLinearInputStream(
42 const AudioParameters& params, const std::string& device_id) OVERRIDE;
43 virtual AudioInputStream* MakeLowLatencyInputStream(
44 const AudioParameters& params, const std::string& device_id) OVERRIDE;
47 virtual ~AudioManagerAlsa();
49 virtual AudioParameters GetPreferredOutputStreamParameters(
50 const std::string& output_device_id,
51 const AudioParameters& input_params) OVERRIDE;
59 // Gets a list of available ALSA devices.
60 void GetAlsaAudioDevices(StreamType type,
61 media::AudioDeviceNames* device_names);
63 // Gets the ALSA devices' names and ids that support streams of the
65 void GetAlsaDevicesInfo(StreamType type,
67 media::AudioDeviceNames* device_names);
69 // Checks if the specific ALSA device is available.
70 static bool IsAlsaDeviceAvailable(StreamType type,
71 const char* device_name);
73 static const char* UnwantedDeviceTypeWhenEnumerating(
74 StreamType wanted_type);
76 // Returns true if a device is present for the given stream type.
77 bool HasAnyAlsaAudioDevice(StreamType stream);
79 // Called by MakeLinearOutputStream and MakeLowLatencyOutputStream.
80 AudioOutputStream* MakeOutputStream(const AudioParameters& params);
82 // Called by MakeLinearInputStream and MakeLowLatencyInputStream.
83 AudioInputStream* MakeInputStream(const AudioParameters& params,
84 const std::string& device_id);
86 scoped_ptr<AlsaWrapper> wrapper_;
88 DISALLOW_COPY_AND_ASSIGN(AudioManagerAlsa);
93 #endif // MEDIA_AUDIO_ALSA_AUDIO_MANAGER_ALSA_H_