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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ |
| 6 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ | 6 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ |
| 7 | 7 |
| 8 #include <string> | 8 #include <string> |
| 9 #include <utility> | 9 #include <utility> |
| 10 | 10 |
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| 41 // AudioInputStream will be capturing audio currently being played on the | 41 // AudioInputStream will be capturing audio currently being played on the |
| 42 // default playback device. At the moment this feature is supported only on | 42 // default playback device. At the moment this feature is supported only on |
| 43 // some platforms. AudioInputStream::Intialize() will return an error on | 43 // some platforms. AudioInputStream::Intialize() will return an error on |
| 44 // platforms that don't support it. GetInputStreamParameters() must be used | 44 // platforms that don't support it. GetInputStreamParameters() must be used |
| 45 // to get the parameters of the loopback device before creating a loopback | 45 // to get the parameters of the loopback device before creating a loopback |
| 46 // stream, otherwise stream initialization may fail. | 46 // stream, otherwise stream initialization may fail. |
| 47 static const char kLoopbackInputDeviceId[]; | 47 static const char kLoopbackInputDeviceId[]; |
| 48 | 48 |
| 49 virtual ~AudioManagerBase(); | 49 virtual ~AudioManagerBase(); |
| 50 | 50 |
| 51 virtual scoped_refptr<base::MessageLoopProxy> GetMessageLoop() OVERRIDE; | 51 virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() OVERRIDE; |
| 52 virtual scoped_refptr<base::MessageLoopProxy> GetWorkerLoop() OVERRIDE; | 52 virtual scoped_refptr<base::SingleThreadTaskRunner> GetWorkerTaskRunner() |
| 53 OVERRIDE; |
| 53 | 54 |
| 54 virtual base::string16 GetAudioInputDeviceModel() OVERRIDE; | 55 virtual base::string16 GetAudioInputDeviceModel() OVERRIDE; |
| 55 | 56 |
| 56 virtual void ShowAudioInputSettings() OVERRIDE; | 57 virtual void ShowAudioInputSettings() OVERRIDE; |
| 57 | 58 |
| 58 virtual void GetAudioInputDeviceNames( | 59 virtual void GetAudioInputDeviceNames( |
| 59 AudioDeviceNames* device_names) OVERRIDE; | 60 AudioDeviceNames* device_names) OVERRIDE; |
| 60 | 61 |
| 61 virtual void GetAudioOutputDeviceNames( | 62 virtual void GetAudioOutputDeviceNames( |
| 62 AudioDeviceNames* device_names) OVERRIDE; | 63 AudioDeviceNames* device_names) OVERRIDE; |
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| 92 | 93 |
| 93 // Creates the input stream for the |AUDIO_PCM_LINEAR| format. The legacy | 94 // Creates the input stream for the |AUDIO_PCM_LINEAR| format. The legacy |
| 94 // name is also from |AUDIO_PCM_LINEAR|. | 95 // name is also from |AUDIO_PCM_LINEAR|. |
| 95 virtual AudioInputStream* MakeLinearInputStream( | 96 virtual AudioInputStream* MakeLinearInputStream( |
| 96 const AudioParameters& params, const std::string& device_id) = 0; | 97 const AudioParameters& params, const std::string& device_id) = 0; |
| 97 | 98 |
| 98 // Creates the input stream for the |AUDIO_PCM_LOW_LATENCY| format. | 99 // Creates the input stream for the |AUDIO_PCM_LOW_LATENCY| format. |
| 99 virtual AudioInputStream* MakeLowLatencyInputStream( | 100 virtual AudioInputStream* MakeLowLatencyInputStream( |
| 100 const AudioParameters& params, const std::string& device_id) = 0; | 101 const AudioParameters& params, const std::string& device_id) = 0; |
| 101 | 102 |
| 102 // Listeners will be notified on the AudioManager::GetMessageLoop() loop. | 103 // Listeners will be notified on the GetTaskRunner() task runner. |
| 103 virtual void AddOutputDeviceChangeListener( | 104 virtual void AddOutputDeviceChangeListener( |
| 104 AudioDeviceListener* listener) OVERRIDE; | 105 AudioDeviceListener* listener) OVERRIDE; |
| 105 virtual void RemoveOutputDeviceChangeListener( | 106 virtual void RemoveOutputDeviceChangeListener( |
| 106 AudioDeviceListener* listener) OVERRIDE; | 107 AudioDeviceListener* listener) OVERRIDE; |
| 107 | 108 |
| 108 virtual AudioParameters GetDefaultOutputStreamParameters() OVERRIDE; | 109 virtual AudioParameters GetDefaultOutputStreamParameters() OVERRIDE; |
| 109 virtual AudioParameters GetOutputStreamParameters( | 110 virtual AudioParameters GetOutputStreamParameters( |
| 110 const std::string& device_id) OVERRIDE; | 111 const std::string& device_id) OVERRIDE; |
| 111 | 112 |
| 112 virtual AudioParameters GetInputStreamParameters( | 113 virtual AudioParameters GetInputStreamParameters( |
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| 180 | 181 |
| 181 // Number of currently open input streams. | 182 // Number of currently open input streams. |
| 182 int num_input_streams_; | 183 int num_input_streams_; |
| 183 | 184 |
| 184 // Track output state change listeners. | 185 // Track output state change listeners. |
| 185 ObserverList<AudioDeviceListener> output_listeners_; | 186 ObserverList<AudioDeviceListener> output_listeners_; |
| 186 | 187 |
| 187 // Thread used to interact with audio streams created by this audio manager. | 188 // Thread used to interact with audio streams created by this audio manager. |
| 188 base::Thread audio_thread_; | 189 base::Thread audio_thread_; |
| 189 | 190 |
| 190 // The message loop of the audio thread this object runs on. Used for internal | 191 // The task runner of the audio thread this object runs on. Used for internal |
| 191 // tasks which run on the audio thread even after Shutdown() has been started | 192 // tasks which run on the audio thread even after Shutdown() has been started |
| 192 // and GetMessageLoop() starts returning NULL. | 193 // and GetTaskRunner() starts returning NULL. |
| 193 scoped_refptr<base::MessageLoopProxy> message_loop_; | 194 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| 194 | 195 |
| 195 // Map of cached AudioOutputDispatcher instances. Must only be touched | 196 // Map of cached AudioOutputDispatcher instances. Must only be touched |
| 196 // from the audio thread (no locking). | 197 // from the audio thread (no locking). |
| 197 AudioOutputDispatchers output_dispatchers_; | 198 AudioOutputDispatchers output_dispatchers_; |
| 198 | 199 |
| 199 // Proxy for creating AudioLog objects. | 200 // Proxy for creating AudioLog objects. |
| 200 AudioLogFactory* const audio_log_factory_; | 201 AudioLogFactory* const audio_log_factory_; |
| 201 | 202 |
| 202 DISALLOW_COPY_AND_ASSIGN(AudioManagerBase); | 203 DISALLOW_COPY_AND_ASSIGN(AudioManagerBase); |
| 203 }; | 204 }; |
| 204 | 205 |
| 205 } // namespace media | 206 } // namespace media |
| 206 | 207 |
| 207 #endif // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ | 208 #endif // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_ |
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