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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 CONTENT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 5 #ifndef MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
6 #define CONTENT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 6 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
7 | 7 |
8 #include "base/callback.h" | 8 #include "base/callback.h" |
9 #include "base/memory/weak_ptr.h" | 9 #include "base/memory/weak_ptr.h" |
10 #include "base/synchronization/lock.h" | 10 #include "base/synchronization/lock.h" |
11 #include "content/common/content_export.h" | |
12 #include "media/base/audio_renderer_sink.h" | 11 #include "media/base/audio_renderer_sink.h" |
| 12 #include "media/base/media_export.h" |
13 #include "third_party/WebKit/public/platform/WebAudioSourceProvider.h" | 13 #include "third_party/WebKit/public/platform/WebAudioSourceProvider.h" |
14 #include "third_party/WebKit/public/platform/WebVector.h" | 14 #include "third_party/WebKit/public/platform/WebVector.h" |
15 | 15 |
16 namespace blink { | 16 namespace blink { |
17 class WebAudioSourceProviderClient; | 17 class WebAudioSourceProviderClient; |
18 } | 18 } |
19 | 19 |
20 namespace content { | 20 namespace media { |
21 | 21 |
22 // WebAudioSourceProviderImpl provides a bridge between classes: | 22 // WebAudioSourceProviderImpl provides a bridge between classes: |
23 // blink::WebAudioSourceProvider <---> media::AudioRendererSink | 23 // blink::WebAudioSourceProvider <---> AudioRendererSink |
24 // | 24 // |
25 // WebAudioSourceProviderImpl wraps an existing audio sink that is used unless | 25 // WebAudioSourceProviderImpl wraps an existing audio sink that is used unless |
26 // WebKit has set a client via setClient(). While a client is set WebKit will | 26 // WebKit has set a client via setClient(). While a client is set WebKit will |
27 // periodically call provideInput() to render a certain number of audio | 27 // periodically call provideInput() to render a certain number of audio |
28 // sample-frames using the sink's RenderCallback to get the data. | 28 // sample-frames using the sink's RenderCallback to get the data. |
29 // | 29 // |
30 // All calls are protected by a lock. | 30 // All calls are protected by a lock. |
31 class CONTENT_EXPORT WebAudioSourceProviderImpl | 31 class MEDIA_EXPORT WebAudioSourceProviderImpl |
32 : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider), | 32 : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider), |
33 NON_EXPORTED_BASE(public media::AudioRendererSink) { | 33 NON_EXPORTED_BASE(public AudioRendererSink) { |
34 public: | 34 public: |
35 explicit WebAudioSourceProviderImpl( | 35 explicit WebAudioSourceProviderImpl( |
36 const scoped_refptr<media::AudioRendererSink>& sink); | 36 const scoped_refptr<AudioRendererSink>& sink); |
37 | 37 |
38 // blink::WebAudioSourceProvider implementation. | 38 // blink::WebAudioSourceProvider implementation. |
39 virtual void setClient(blink::WebAudioSourceProviderClient* client); | 39 virtual void setClient(blink::WebAudioSourceProviderClient* client); |
40 virtual void provideInput(const blink::WebVector<float*>& audio_data, | 40 virtual void provideInput(const blink::WebVector<float*>& audio_data, |
41 size_t number_of_frames); | 41 size_t number_of_frames); |
42 | 42 |
43 // media::AudioRendererSink implementation. | 43 // AudioRendererSink implementation. |
44 virtual void Start() OVERRIDE; | 44 virtual void Start() OVERRIDE; |
45 virtual void Stop() OVERRIDE; | 45 virtual void Stop() OVERRIDE; |
46 virtual void Play() OVERRIDE; | 46 virtual void Play() OVERRIDE; |
47 virtual void Pause() OVERRIDE; | 47 virtual void Pause() OVERRIDE; |
48 virtual bool SetVolume(double volume) OVERRIDE; | 48 virtual bool SetVolume(double volume) OVERRIDE; |
49 virtual void Initialize(const media::AudioParameters& params, | 49 virtual void Initialize(const AudioParameters& params, |
50 RenderCallback* renderer) OVERRIDE; | 50 RenderCallback* renderer) OVERRIDE; |
51 | 51 |
52 protected: | 52 protected: |
53 virtual ~WebAudioSourceProviderImpl(); | 53 virtual ~WebAudioSourceProviderImpl(); |
54 | 54 |
55 private: | 55 private: |
56 // Calls setFormat() on |client_| from the Blink renderer thread. | 56 // Calls setFormat() on |client_| from the Blink renderer thread. |
57 void OnSetFormat(); | 57 void OnSetFormat(); |
58 | 58 |
59 // Closure that posts a task to call OnSetFormat() on the renderer thread. | 59 // Closure that posts a task to call OnSetFormat() on the renderer thread. |
60 base::Closure set_format_cb_; | 60 base::Closure set_format_cb_; |
61 | 61 |
62 // Set to true when Initialize() is called. | 62 // Set to true when Initialize() is called. |
63 int channels_; | 63 int channels_; |
64 int sample_rate_; | 64 int sample_rate_; |
65 double volume_; | 65 double volume_; |
66 | 66 |
67 // Tracks the current playback state. | 67 // Tracks the current playback state. |
68 enum PlaybackState { kStopped, kStarted, kPlaying }; | 68 enum PlaybackState { kStopped, kStarted, kPlaying }; |
69 PlaybackState state_; | 69 PlaybackState state_; |
70 | 70 |
71 // Where audio comes from. | 71 // Where audio comes from. |
72 media::AudioRendererSink::RenderCallback* renderer_; | 72 AudioRendererSink::RenderCallback* renderer_; |
73 | 73 |
74 // When set via setClient() it overrides |sink_| for consuming audio. | 74 // When set via setClient() it overrides |sink_| for consuming audio. |
75 blink::WebAudioSourceProviderClient* client_; | 75 blink::WebAudioSourceProviderClient* client_; |
76 | 76 |
77 // Where audio ends up unless overridden by |client_|. | 77 // Where audio ends up unless overridden by |client_|. |
78 base::Lock sink_lock_; | 78 base::Lock sink_lock_; |
79 scoped_refptr<media::AudioRendererSink> sink_; | 79 scoped_refptr<AudioRendererSink> sink_; |
80 scoped_ptr<media::AudioBus> bus_wrapper_; | 80 scoped_ptr<AudioBus> bus_wrapper_; |
81 | 81 |
82 // NOTE: Weak pointers must be invalidated before all other member variables. | 82 // NOTE: Weak pointers must be invalidated before all other member variables. |
83 base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_; | 83 base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_; |
84 | 84 |
85 DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl); | 85 DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl); |
86 }; | 86 }; |
87 | 87 |
88 } // namespace content | 88 } // namespace media |
89 | 89 |
90 #endif // CONTENT_RENDERER_MEDIA_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 90 #endif // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
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