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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 // Creates an audio output stream based on the PulseAudio asynchronous API; | 5 // Creates an audio output stream based on the PulseAudio asynchronous API; |
| 6 // specifically using the pa_threaded_mainloop model. | 6 // specifically using the pa_threaded_mainloop model. |
| 7 // | 7 // |
| 8 // If the stream is successfully opened, Close() must be called before the | 8 // If the stream is successfully opened, Close() must be called before the |
| 9 // stream is deleted as Close() is responsible for ensuring resource cleanup | 9 // stream is deleted as Close() is responsible for ensuring resource cleanup |
| 10 // occurs. | 10 // occurs. |
| 11 // | 11 // |
| 12 // This object is designed so that all AudioOutputStream methods will be called | 12 // This object is designed so that all AudioOutputStream methods will be called |
| 13 // on the same thread that created the object. | 13 // on the same thread that created the object. |
| 14 // | 14 // |
| 15 // WARNING: This object blocks on internal PulseAudio calls in Open() while | 15 // WARNING: This object blocks on internal PulseAudio calls in Open() while |
| 16 // waiting for PulseAudio's context structure to be ready. It also blocks in | 16 // waiting for PulseAudio's context structure to be ready. It also blocks in |
| 17 // inside PulseAudio in Start() and repeated during playback, waiting for | 17 // inside PulseAudio in Start() and repeated during playback, waiting for |
| 18 // PulseAudio write callbacks to occur. | 18 // PulseAudio write callbacks to occur. |
| 19 | 19 |
| 20 #ifndef MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ | 20 #ifndef MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ |
| 21 #define MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ | 21 #define MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ |
| 22 | 22 |
| 23 #include <stddef.h> |
| 24 |
| 23 #include <string> | 25 #include <string> |
| 24 | 26 |
| 25 #include "base/macros.h" | 27 #include "base/macros.h" |
| 26 #include "base/memory/scoped_ptr.h" | 28 #include "base/memory/scoped_ptr.h" |
| 27 #include "base/threading/thread_checker.h" | 29 #include "base/threading/thread_checker.h" |
| 28 #include "media/audio/audio_io.h" | 30 #include "media/audio/audio_io.h" |
| 29 #include "media/audio/audio_parameters.h" | 31 #include "media/audio/audio_parameters.h" |
| 30 | 32 |
| 31 struct pa_context; | 33 struct pa_context; |
| 32 struct pa_operation; | 34 struct pa_operation; |
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| 93 scoped_ptr<AudioBus> audio_bus_; | 95 scoped_ptr<AudioBus> audio_bus_; |
| 94 | 96 |
| 95 base::ThreadChecker thread_checker_; | 97 base::ThreadChecker thread_checker_; |
| 96 | 98 |
| 97 DISALLOW_COPY_AND_ASSIGN(PulseAudioOutputStream); | 99 DISALLOW_COPY_AND_ASSIGN(PulseAudioOutputStream); |
| 98 }; | 100 }; |
| 99 | 101 |
| 100 } // namespace media | 102 } // namespace media |
| 101 | 103 |
| 102 #endif // MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ | 104 #endif // MEDIA_AUDIO_PULSE_PULSE_OUTPUT_H_ |
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