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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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_FILTERS_AUDIO_RENDERER_IMPL_H_ | 5 #ifndef MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_ |
| 6 #define MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 6 #define MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_ |
| 7 | 7 |
| 8 // This is the default implementation of AudioRenderer, which uses the audio | 8 // This is the reference implementation of AudioRenderer, which uses the audio |
| 9 // interfaces to open an audio device. Although it cannot be used in the | 9 // interfaces to open an audio device. It cannot be used in the sandbox, but is |
| 10 // sandbox, it serves as a reference implementation and can be used in other | 10 // used in other applications such as the test player. |
| 11 // applications such as the test player. | |
| 12 // | 11 // |
| 13 // Note: THIS IS NOT THE AUDIO RENDERER USED IN CHROME. | 12 // Note: THIS IS NOT THE AUDIO RENDERER USED IN CHROME. |
| 14 // | 13 // |
| 15 // See src/chrome/renderer/media/audio_renderer_impl.h for chrome's | 14 // See src/chrome/renderer/media/audio_renderer_impl.h for chrome's |
| 16 // implementation. | 15 // implementation. |
| 17 | 16 |
| 18 #include <deque> | 17 #include <deque> |
| 19 | 18 |
| 20 #include "media/audio/audio_io.h" | 19 #include "media/audio/audio_io.h" |
| 21 #include "media/base/buffers.h" | 20 #include "media/base/buffers.h" |
| 22 #include "media/base/filters.h" | 21 #include "media/base/filters.h" |
| 23 #include "media/filters/audio_renderer_base.h" | 22 #include "media/filters/audio_renderer_base.h" |
| 24 | 23 |
| 25 namespace media { | 24 namespace media { |
| 26 | 25 |
| 27 class MEDIA_EXPORT AudioRendererImpl | 26 class MEDIA_EXPORT ReferenceAudioRenderer |
| 28 : public AudioRendererBase, | 27 : public AudioRendererBase, |
| 29 public AudioOutputStream::AudioSourceCallback { | 28 public AudioOutputStream::AudioSourceCallback { |
| 30 public: | 29 public: |
| 31 AudioRendererImpl(); | 30 ReferenceAudioRenderer(); |
| 32 virtual ~AudioRendererImpl(); | 31 virtual ~ReferenceAudioRenderer(); |
| 33 | 32 |
| 34 // Filter implementation. | 33 // Filter implementation. |
| 35 virtual void SetPlaybackRate(float playback_rate); | 34 virtual void SetPlaybackRate(float playback_rate); |
| 36 | 35 |
| 37 // AudioRenderer implementation. | 36 // AudioRenderer implementation. |
| 38 virtual void SetVolume(float volume); | 37 virtual void SetVolume(float volume); |
| 39 | 38 |
| 40 // AudioSourceCallback implementation. | 39 // AudioSourceCallback implementation. |
| 41 virtual uint32 OnMoreData(AudioOutputStream* stream, uint8* dest, | 40 virtual uint32 OnMoreData(AudioOutputStream* stream, uint8* dest, |
| 42 uint32 len, AudioBuffersState buffers_state); | 41 uint32 len, AudioBuffersState buffers_state); |
| 43 virtual void OnClose(AudioOutputStream* stream); | 42 virtual void OnClose(AudioOutputStream* stream); |
| 44 virtual void OnError(AudioOutputStream* stream, int code); | 43 virtual void OnError(AudioOutputStream* stream, int code); |
| 45 | 44 |
| 46 protected: | 45 protected: |
| 47 // AudioRendererBase implementation. | 46 // AudioRendererBase implementation. |
| 48 virtual bool OnInitialize(int bits_per_channel, | 47 virtual bool OnInitialize(int bits_per_channel, |
| 49 ChannelLayout channel_layout, | 48 ChannelLayout channel_layout, |
| 50 int sample_rate); | 49 int sample_rate); |
| 51 virtual void OnStop(); | 50 virtual void OnStop(); |
| 52 | 51 |
| 53 private: | 52 private: |
| 54 // Audio output stream device. | 53 // Audio output stream device. |
| 55 AudioOutputStream* stream_; | 54 AudioOutputStream* stream_; |
| 56 int bytes_per_second_; | 55 int bytes_per_second_; |
| 57 | 56 |
| 58 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 57 DISALLOW_COPY_AND_ASSIGN(ReferenceAudioRenderer); |
| 59 }; | 58 }; |
| 60 | 59 |
| 61 } // namespace media | 60 } // namespace media |
| 62 | 61 |
| 63 #endif // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 62 #endif // MEDIA_FILTERS_REFERENCE_AUDIO_RENDERER_H_ |
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