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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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