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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 // Audio rendering unit utilizing audio output stream provided by browser | 5 // Audio rendering unit utilizing audio output stream provided by browser |
| 6 // process through IPC. | 6 // process through IPC. |
| 7 // | 7 // |
| 8 // Relationship of classes. | 8 // Relationship of classes. |
| 9 // | 9 // |
| 10 // AudioRendererHost AudioRendererImpl | 10 // AudioRendererHost AudioRendererImpl |
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| 27 // This class lives inside three threads during it's lifetime, namely: | 27 // This class lives inside three threads during it's lifetime, namely: |
| 28 // 1. IO thread. | 28 // 1. IO thread. |
| 29 // The thread within which this class receives all the IPC messages and | 29 // The thread within which this class receives all the IPC messages and |
| 30 // IPC communications can only happen in this thread. | 30 // IPC communications can only happen in this thread. |
| 31 // 2. Pipeline thread | 31 // 2. Pipeline thread |
| 32 // Initialization of filter and proper stopping of filters happens here. | 32 // Initialization of filter and proper stopping of filters happens here. |
| 33 // Properties of this filter is also set in this thread. | 33 // Properties of this filter is also set in this thread. |
| 34 // 3. Audio decoder thread (If there's one.) | 34 // 3. Audio decoder thread (If there's one.) |
| 35 // Responsible for decoding audio data and gives raw PCM data to this object. | 35 // Responsible for decoding audio data and gives raw PCM data to this object. |
| 36 | 36 |
| 37 #ifndef CHROME_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ | 37 #ifndef CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ |
| 38 #define CHROME_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ | 38 #define CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ |
| 39 #pragma once | 39 #pragma once |
| 40 | 40 |
| 41 #include "base/gtest_prod_util.h" | 41 #include "base/gtest_prod_util.h" |
| 42 #include "base/message_loop.h" | 42 #include "base/message_loop.h" |
| 43 #include "base/scoped_ptr.h" | 43 #include "base/scoped_ptr.h" |
| 44 #include "base/shared_memory.h" | 44 #include "base/shared_memory.h" |
| 45 #include "base/synchronization/lock.h" | 45 #include "base/synchronization/lock.h" |
| 46 #include "chrome/renderer/audio_message_filter.h" | 46 #include "chrome/renderer/audio_message_filter.h" |
| 47 #include "media/audio/audio_io.h" | 47 #include "media/audio/audio_io.h" |
| 48 #include "media/audio/audio_manager.h" | 48 #include "media/audio/audio_manager.h" |
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| 147 | 147 |
| 148 // State variables for prerolling. | 148 // State variables for prerolling. |
| 149 bool prerolling_; | 149 bool prerolling_; |
| 150 | 150 |
| 151 // Remaining bytes for prerolling to complete. | 151 // Remaining bytes for prerolling to complete. |
| 152 uint32 preroll_bytes_; | 152 uint32 preroll_bytes_; |
| 153 | 153 |
| 154 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 154 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); |
| 155 }; | 155 }; |
| 156 | 156 |
| 157 #endif // CHROME_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ | 157 #endif // CONTENT_RENDERER_MEDIA_AUDIO_RENDERER_IMPL_H_ |
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