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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 // Implementation of AudioOutputStream for Windows using Windows Core Audio | 5 // Implementation of AudioOutputStream for Windows using Windows Core Audio |
6 // WASAPI for low latency rendering. | 6 // WASAPI for low latency rendering. |
7 // | 7 // |
8 // Overview of operation and performance: | 8 // Overview of operation and performance: |
9 // | 9 // |
10 // - An object of WASAPIAudioOutputStream is created by the AudioManager | 10 // - An object of WASAPIAudioOutputStream is created by the AudioManager |
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103 #include "base/compiler_specific.h" | 103 #include "base/compiler_specific.h" |
104 #include "base/macros.h" | 104 #include "base/macros.h" |
105 #include "base/memory/scoped_ptr.h" | 105 #include "base/memory/scoped_ptr.h" |
106 #include "base/threading/platform_thread.h" | 106 #include "base/threading/platform_thread.h" |
107 #include "base/threading/simple_thread.h" | 107 #include "base/threading/simple_thread.h" |
108 #include "base/win/scoped_co_mem.h" | 108 #include "base/win/scoped_co_mem.h" |
109 #include "base/win/scoped_com_initializer.h" | 109 #include "base/win/scoped_com_initializer.h" |
110 #include "base/win/scoped_comptr.h" | 110 #include "base/win/scoped_comptr.h" |
111 #include "base/win/scoped_handle.h" | 111 #include "base/win/scoped_handle.h" |
112 #include "media/audio/audio_io.h" | 112 #include "media/audio/audio_io.h" |
113 #include "media/audio/audio_parameters.h" | 113 #include "media/base/audio_parameters.h" |
114 #include "media/base/media_export.h" | 114 #include "media/base/media_export.h" |
115 | 115 |
116 namespace media { | 116 namespace media { |
117 | 117 |
118 class AudioManagerWin; | 118 class AudioManagerWin; |
119 | 119 |
120 // AudioOutputStream implementation using Windows Core Audio APIs. | 120 // AudioOutputStream implementation using Windows Core Audio APIs. |
121 class MEDIA_EXPORT WASAPIAudioOutputStream : | 121 class MEDIA_EXPORT WASAPIAudioOutputStream : |
122 public AudioOutputStream, | 122 public AudioOutputStream, |
123 public base::DelegateSimpleThread::Delegate { | 123 public base::DelegateSimpleThread::Delegate { |
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243 scoped_ptr<AudioBus> audio_bus_; | 243 scoped_ptr<AudioBus> audio_bus_; |
244 | 244 |
245 base::win::ScopedComPtr<IAudioClock> audio_clock_; | 245 base::win::ScopedComPtr<IAudioClock> audio_clock_; |
246 | 246 |
247 DISALLOW_COPY_AND_ASSIGN(WASAPIAudioOutputStream); | 247 DISALLOW_COPY_AND_ASSIGN(WASAPIAudioOutputStream); |
248 }; | 248 }; |
249 | 249 |
250 } // namespace media | 250 } // namespace media |
251 | 251 |
252 #endif // MEDIA_AUDIO_WIN_AUDIO_LOW_LATENCY_OUTPUT_WIN_H_ | 252 #endif // MEDIA_AUDIO_WIN_AUDIO_LOW_LATENCY_OUTPUT_WIN_H_ |
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