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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 // AudioOutputDispatcher is a single-threaded base class that dispatches | 5 // AudioOutputDispatcher is a single-threaded base class that dispatches |
| 6 // creation and deletion of audio output streams. AudioOutputProxy objects use | 6 // creation and deletion of audio output streams. AudioOutputProxy objects use |
| 7 // this class to allocate and recycle actual audio output streams. When playback | 7 // this class to allocate and recycle actual audio output streams. When playback |
| 8 // is started, the proxy calls StartStream() to get an output stream that it | 8 // is started, the proxy calls StartStream() to get an output stream that it |
| 9 // uses to play audio. When playback is stopped, the proxy returns the stream | 9 // uses to play audio. When playback is stopped, the proxy returns the stream |
| 10 // back to the dispatcher by calling StopStream(). | 10 // back to the dispatcher by calling StopStream(). |
| 11 // | 11 // |
| 12 // AudioManagerBase creates one specialization of AudioOutputDispatcher on the | 12 // AudioManagerBase creates one specialization of AudioOutputDispatcher on the |
| 13 // audio thread for each possible set of audio parameters. I.e streams with | 13 // audio thread for each possible set of audio parameters. I.e streams with |
| 14 // different parameters are managed independently. The AudioOutputDispatcher | 14 // different parameters are managed independently. The AudioOutputDispatcher |
| 15 // instance is then deleted on the audio thread when the AudioManager shuts | 15 // instance is then deleted on the audio thread when the AudioManager shuts |
| 16 // down. | 16 // down. |
| 17 | 17 |
| 18 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ | 18 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ |
| 19 #define MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ | 19 #define MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ |
| 20 | 20 |
| 21 #include "base/macros.h" | 21 #include "base/macros.h" |
| 22 #include "base/memory/ref_counted.h" | 22 #include "base/memory/ref_counted.h" |
| 23 #include "media/audio/audio_io.h" | 23 #include "media/audio/audio_io.h" |
| 24 #include "media/audio/audio_manager.h" | 24 #include "media/audio/audio_manager.h" |
| 25 #include "media/audio/audio_parameters.h" | 25 #include "media/base/audio_parameters.h" |
| 26 | 26 |
| 27 namespace base { | 27 namespace base { |
| 28 class SingleThreadTaskRunner; | 28 class SingleThreadTaskRunner; |
| 29 } | 29 } |
| 30 | 30 |
| 31 namespace media { | 31 namespace media { |
| 32 | 32 |
| 33 class AudioOutputProxy; | 33 class AudioOutputProxy; |
| 34 | 34 |
| 35 class MEDIA_EXPORT AudioOutputDispatcher | 35 class MEDIA_EXPORT AudioOutputDispatcher |
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| 77 const AudioParameters params_; | 77 const AudioParameters params_; |
| 78 std::string device_id_; | 78 std::string device_id_; |
| 79 | 79 |
| 80 private: | 80 private: |
| 81 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); | 81 DISALLOW_COPY_AND_ASSIGN(AudioOutputDispatcher); |
| 82 }; | 82 }; |
| 83 | 83 |
| 84 } // namespace media | 84 } // namespace media |
| 85 | 85 |
| 86 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ | 86 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DISPATCHER_H_ |
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