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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 #ifndef MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 5 #ifndef MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ |
| 6 #define MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 6 #define MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ |
| 7 | 7 |
| 8 // This is the default implementation of AudioRenderer, which uses the audio | 8 // This is the default 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. Although it cannot be used in the |
| 10 // sandbox, it serves as a reference implementation and can be used in other | 10 // sandbox, it serves as a reference implementation and can be used in other |
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| 23 #include "media/filters/audio_renderer_base.h" | 23 #include "media/filters/audio_renderer_base.h" |
| 24 | 24 |
| 25 namespace media { | 25 namespace media { |
| 26 | 26 |
| 27 class AudioRendererImpl : public AudioRendererBase, | 27 class AudioRendererImpl : public AudioRendererBase, |
| 28 public AudioOutputStream::AudioSourceCallback { | 28 public AudioOutputStream::AudioSourceCallback { |
| 29 public: | 29 public: |
| 30 AudioRendererImpl(); | 30 AudioRendererImpl(); |
| 31 virtual ~AudioRendererImpl(); | 31 virtual ~AudioRendererImpl(); |
| 32 | 32 |
| 33 // MediaFilter implementation. | 33 // Filter implementation. |
| 34 virtual void SetPlaybackRate(float playback_rate); | 34 virtual void SetPlaybackRate(float playback_rate); |
| 35 | 35 |
| 36 // AudioRenderer implementation. | 36 // AudioRenderer implementation. |
| 37 virtual void SetVolume(float volume); | 37 virtual void SetVolume(float volume); |
| 38 | 38 |
| 39 // AudioSourceCallback implementation. | 39 // AudioSourceCallback implementation. |
| 40 virtual uint32 OnMoreData(AudioOutputStream* stream, uint8* dest, | 40 virtual uint32 OnMoreData(AudioOutputStream* stream, uint8* dest, |
| 41 uint32 len, AudioBuffersState buffers_state); | 41 uint32 len, AudioBuffersState buffers_state); |
| 42 virtual void OnClose(AudioOutputStream* stream); | 42 virtual void OnClose(AudioOutputStream* stream); |
| 43 virtual void OnError(AudioOutputStream* stream, int code); | 43 virtual void OnError(AudioOutputStream* stream, int code); |
| 44 | 44 |
| 45 protected: | 45 protected: |
| 46 // AudioRendererBase implementation. | 46 // AudioRendererBase implementation. |
| 47 virtual bool OnInitialize(const MediaFormat& media_format); | 47 virtual bool OnInitialize(const MediaFormat& media_format); |
| 48 virtual void OnStop(); | 48 virtual void OnStop(); |
| 49 | 49 |
| 50 private: | 50 private: |
| 51 // Audio output stream device. | 51 // Audio output stream device. |
| 52 AudioOutputStream* stream_; | 52 AudioOutputStream* stream_; |
| 53 int bytes_per_second_; | 53 int bytes_per_second_; |
| 54 | 54 |
| 55 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); | 55 DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl); |
| 56 }; | 56 }; |
| 57 | 57 |
| 58 } // namespace media | 58 } // namespace media |
| 59 | 59 |
| 60 #endif // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ | 60 #endif // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_ |
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