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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_OUTPUT_PROXY_H_ | 5 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
6 #define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ | 6 #define MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
11 #include "base/threading/non_thread_safe.h" | 11 #include "base/threading/non_thread_safe.h" |
12 #include "media/audio/audio_io.h" | 12 #include "media/audio/audio_io.h" |
13 #include "media/audio/audio_parameters.h" | 13 #include "media/audio/audio_parameters.h" |
14 | 14 |
| 15 namespace media { |
| 16 |
15 class AudioOutputDispatcher; | 17 class AudioOutputDispatcher; |
16 | 18 |
17 // AudioOutputProxy is an audio otput stream that uses resources more | 19 // AudioOutputProxy is an audio otput stream that uses resources more |
18 // efficiently than a regular audio output stream: it opens audio | 20 // efficiently than a regular audio output stream: it opens audio |
19 // device only when sound is playing, i.e. between Start() and Stop() | 21 // device only when sound is playing, i.e. between Start() and Stop() |
20 // (there is still one physical stream per each audio output proxy in | 22 // (there is still one physical stream per each audio output proxy in |
21 // playing state). | 23 // playing state). |
22 // | 24 // |
23 // AudioOutputProxy uses AudioOutputDispatcher to open and close | 25 // AudioOutputProxy uses AudioOutputDispatcher to open and close |
24 // physical output streams. | 26 // physical output streams. |
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55 // than kPlaying. | 57 // than kPlaying. |
56 AudioOutputStream* physical_stream_; | 58 AudioOutputStream* physical_stream_; |
57 | 59 |
58 // Need to save volume here, so that we can restore it in case the stream | 60 // Need to save volume here, so that we can restore it in case the stream |
59 // is stopped, and then started again. | 61 // is stopped, and then started again. |
60 double volume_; | 62 double volume_; |
61 | 63 |
62 DISALLOW_COPY_AND_ASSIGN(AudioOutputProxy); | 64 DISALLOW_COPY_AND_ASSIGN(AudioOutputProxy); |
63 }; | 65 }; |
64 | 66 |
| 67 } // namespace media |
| 68 |
65 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ | 69 #endif // MEDIA_AUDIO_AUDIO_OUTPUT_PROXY_H_ |
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