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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_RENDERERS_AUDIO_RENDERER_IMPL_H_ | 19 #ifndef MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
| 20 #define MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ | 20 #define MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
| 21 | 21 |
| 22 #include <stdint.h> |
| 23 |
| 22 #include <deque> | 24 #include <deque> |
| 23 | 25 |
| 24 #include "base/macros.h" | 26 #include "base/macros.h" |
| 25 #include "base/memory/scoped_ptr.h" | 27 #include "base/memory/scoped_ptr.h" |
| 26 #include "base/memory/weak_ptr.h" | 28 #include "base/memory/weak_ptr.h" |
| 27 #include "base/synchronization/lock.h" | 29 #include "base/synchronization/lock.h" |
| 28 #include "media/base/audio_decoder.h" | 30 #include "media/base/audio_decoder.h" |
| 29 #include "media/base/audio_renderer.h" | 31 #include "media/base/audio_renderer.h" |
| 30 #include "media/base/audio_renderer_sink.h" | 32 #include "media/base/audio_renderer_sink.h" |
| 31 #include "media/base/decryptor.h" | 33 #include "media/base/decryptor.h" |
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| 282 | 284 |
| 283 // NOTE: Weak pointers must be invalidated before all other member variables. | 285 // NOTE: Weak pointers must be invalidated before all other member variables. |
| 284 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; | 286 base::WeakPtrFactory<AudioRendererImpl> weak_factory_; |
| 285 | 287 |
| 286 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 288 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); |
| 287 }; | 289 }; |
| 288 | 290 |
| 289 } // namespace media | 291 } // namespace media |
| 290 | 292 |
| 291 #endif // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ | 293 #endif // MEDIA_RENDERERS_AUDIO_RENDERER_IMPL_H_ |
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