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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 // Audio rendering unit utilizing an AudioRendererSink to output data. | 5 // Audio rendering unit utilizing an AudioRendererSink to output data. |
| 6 // | 6 // |
| 7 // This class lives inside three threads during it's lifetime, namely: | 7 // This class lives inside three threads during it's lifetime, namely: |
| 8 // 1. Render thread | 8 // 1. Render thread |
| 9 // Where the object is created. | 9 // Where the object is created. |
| 10 // 2. Media thread (provided via constructor) | 10 // 2. Media thread (provided via constructor) |
| 11 // All AudioDecoder methods are called on this thread. | 11 // All AudioDecoder methods are called on this thread. |
| 12 // 3. Audio thread created by the AudioRendererSink. | 12 // 3. Audio thread created by the AudioRendererSink. |
| 13 // Render() is called here where audio data is decoded into raw PCM data. | 13 // Render() is called here where audio data is decoded into raw PCM data. |
| 14 // | 14 // |
| 15 // AudioRendererImpl talks to an AudioRendererAlgorithm that takes care of | 15 // AudioRendererImpl talks to an AudioRendererAlgorithm that takes care of |
| 16 // queueing audio data and stretching/shrinking audio data when playback rate != | 16 // queueing audio data and stretching/shrinking audio data when playback rate != |
| 17 // 1.0 or 0.0. | 17 // 1.0 or 0.0. |
| 18 | 18 |
| 19 #ifndef MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 19 #ifndef MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
| 20 #define MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 20 #define MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
| 21 | 21 |
| 22 #include <deque> | 22 #include <deque> |
| 23 | 23 |
| 24 #include "base/gtest_prod_util.h" | 24 #include "base/gtest_prod_util.h" |
| 25 #include "base/memory/scoped_ptr.h" | 25 #include "base/memory/scoped_ptr.h" |
| 26 #include "base/memory/weak_ptr.h" | 26 #include "base/memory/weak_ptr.h" |
| 27 #include "base/synchronization/lock.h" | 27 #include "base/synchronization/lock.h" |
| 28 #include "media/base/audio_decoder.h" | 28 #include "media/base/audio_decoder.h" |
| 29 #include "media/base/audio_renderer.h" | 29 #include "media/base/audio_renderer.h" |
| 30 #include "media/base/audio_renderer_sink.h" | 30 #include "media/base/audio_renderer_sink.h" |
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| 264 // End variables which must be accessed under |lock_|. ---------------------- | 264 // End variables which must be accessed under |lock_|. ---------------------- |
| 265 | 265 |
| 266 // NOTE: Weak pointers must be invalidated before all other member variables. | 266 // NOTE: Weak pointers must be invalidated before all other member variables. |
| 267 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; | 267 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; |
| 268 | 268 |
| 269 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 269 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); |
| 270 }; | 270 }; |
| 271 | 271 |
| 272 } // namespace media | 272 } // namespace media |
| 273 | 273 |
| 274 #endif // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 274 #endif // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
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