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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 MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 5 #ifndef MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
6 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 6 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
11 | 11 |
12 #include "base/callback.h" | 12 #include "base/callback.h" |
13 #include "base/macros.h" | 13 #include "base/macros.h" |
14 #include "base/memory/weak_ptr.h" | 14 #include "base/memory/weak_ptr.h" |
15 #include "base/synchronization/lock.h" | 15 #include "base/synchronization/lock.h" |
16 #include "media/base/audio_renderer_sink.h" | 16 #include "media/base/audio_renderer_sink.h" |
17 #include "media/blink/media_blink_export.h" | 17 #include "media/blink/media_blink_export.h" |
18 #include "third_party/WebKit/public/platform/WebAudioSourceProvider.h" | 18 #include "third_party/WebKit/public/platform/WebAudioSourceProvider.h" |
19 #include "third_party/WebKit/public/platform/WebVector.h" | 19 #include "third_party/WebKit/public/platform/WebVector.h" |
20 | 20 |
21 namespace blink { | 21 namespace blink { |
22 class WebAudioSourceProviderClient; | 22 class WebAudioSourceProviderClient; |
23 } | 23 } |
24 | 24 |
25 namespace media { | 25 namespace media { |
26 | 26 |
27 // WebAudioSourceProviderImpl provides a bridge between classes: | 27 // WebAudioSourceProviderImpl is either one of two things: |
28 // blink::WebAudioSourceProvider <---> AudioRendererSink | 28 // - a connection between a RestartableAudioRendererSink passed in constructor |
29 // | 29 // and an AudioRendererSink::RenderCallback passed on Initialize(), by being |
30 // WebAudioSourceProviderImpl wraps an existing audio sink that is used unless | 30 // itself a forwarding AudioRendererSink::RenderCallback - which also |
31 // WebKit has set a client via setClient(). While a client is set WebKit will | 31 // eavesdrops if listeners are configured. |
32 // periodically call provideInput() to render a certain number of audio | 32 // - a connection between the said AudioRendererSink::RenderCallback and a |
33 // sample-frames using the sink's RenderCallback to get the data. | 33 // blink::WebAudioSourceProviderClient passed via setClient(), by being itself |
34 // a blink::WebAudioSourceProvider. Blink calls provideInput() periodically | |
35 // to fetch the appropriate data. | |
36 // Finally, WASPImpl is also a RestartableAudioRendererSink to be controlled by | |
37 // an AudioRenderer (which happens to be our AudioRendererSink::RenderCallback). | |
34 // | 38 // |
35 // All calls are protected by a lock. | 39 // All calls are protected by a lock. |
36 class MEDIA_BLINK_EXPORT WebAudioSourceProviderImpl | 40 class MEDIA_BLINK_EXPORT WebAudioSourceProviderImpl |
37 : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider), | 41 : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider), |
38 NON_EXPORTED_BASE(public RestartableAudioRendererSink) { | 42 NON_EXPORTED_BASE(public RestartableAudioRendererSink), |
43 NON_EXPORTED_BASE(public AudioRendererSink::RenderCallback) { | |
DaleCurtis
2016/03/11 01:41:42
Instead of inheriting from this can you create a n
mcasas
2016/03/11 04:06:23
I think is messier but done.
Called the inner thi
| |
39 public: | 44 public: |
45 using OnAudioBusCB = | |
DaleCurtis
2016/03/11 01:41:42
OnAudioBusCB is a bit specific. How about somethin
mcasas
2016/03/11 04:06:23
Done
| |
46 base::Callback<void(scoped_ptr<AudioBus>, uint32_t delay_milliseconds)>; | |
47 | |
40 explicit WebAudioSourceProviderImpl( | 48 explicit WebAudioSourceProviderImpl( |
41 const scoped_refptr<RestartableAudioRendererSink>& sink); | 49 const scoped_refptr<RestartableAudioRendererSink>& sink); |
42 | 50 |
43 // blink::WebAudioSourceProvider implementation. | 51 // blink::WebAudioSourceProvider implementation. |
44 void setClient(blink::WebAudioSourceProviderClient* client) override; | 52 void setClient(blink::WebAudioSourceProviderClient* client) override; |
45 void provideInput(const blink::WebVector<float*>& audio_data, | 53 void provideInput(const blink::WebVector<float*>& audio_data, |
46 size_t number_of_frames) override; | 54 size_t number_of_frames) override; |
47 | 55 |
48 // RestartableAudioRendererSink implementation. | 56 // RestartableAudioRendererSink implementation. |
49 void Start() override; | 57 void Start() override; |
50 void Stop() override; | 58 void Stop() override; |
51 void Play() override; | 59 void Play() override; |
52 void Pause() override; | 60 void Pause() override; |
53 bool SetVolume(double volume) override; | 61 bool SetVolume(double volume) override; |
54 OutputDevice* GetOutputDevice() override; | 62 OutputDevice* GetOutputDevice() override; |
55 void Initialize(const AudioParameters& params, | 63 void Initialize(const AudioParameters& params, |
56 RenderCallback* renderer) override; | 64 AudioRendererSink::RenderCallback* renderer) override; |
65 | |
66 // AudioRendererSink::RenderCallback implementation. | |
67 // These are forwarders to |renderer_| and are here to allow for a client to | |
68 // get a copy of the rendered audio by RegisterOnAudioBusCallback(). | |
69 int Render(AudioBus* audio_bus, | |
70 uint32_t delay_milliseconds, | |
71 uint32_t frames_skipped) override; | |
72 void OnRenderError() override; | |
73 | |
74 void RegisterOnAudioBusCallback(const OnAudioBusCB& callback); | |
75 void ResetOnAudioBusCallback(); | |
57 | 76 |
58 protected: | 77 protected: |
59 ~WebAudioSourceProviderImpl() override; | 78 ~WebAudioSourceProviderImpl() override; |
60 | 79 |
61 private: | 80 private: |
62 // Calls setFormat() on |client_| from the Blink renderer thread. | 81 // Calls setFormat() on |client_| from the Blink renderer thread. |
63 void OnSetFormat(); | 82 void OnSetFormat(); |
64 | 83 |
65 // Closure that posts a task to call OnSetFormat() on the renderer thread. | 84 // Closure that posts a task to call OnSetFormat() on the renderer thread. |
66 base::Closure set_format_cb_; | 85 base::Closure set_format_cb_; |
(...skipping 11 matching lines...) Expand all Loading... | |
78 AudioRendererSink::RenderCallback* renderer_; | 97 AudioRendererSink::RenderCallback* renderer_; |
79 | 98 |
80 // When set via setClient() it overrides |sink_| for consuming audio. | 99 // When set via setClient() it overrides |sink_| for consuming audio. |
81 blink::WebAudioSourceProviderClient* client_; | 100 blink::WebAudioSourceProviderClient* client_; |
82 | 101 |
83 // Where audio ends up unless overridden by |client_|. | 102 // Where audio ends up unless overridden by |client_|. |
84 base::Lock sink_lock_; | 103 base::Lock sink_lock_; |
85 scoped_refptr<RestartableAudioRendererSink> sink_; | 104 scoped_refptr<RestartableAudioRendererSink> sink_; |
86 scoped_ptr<AudioBus> bus_wrapper_; | 105 scoped_ptr<AudioBus> bus_wrapper_; |
87 | 106 |
107 OnAudioBusCB onaudiobus_callback_; | |
108 | |
88 // NOTE: Weak pointers must be invalidated before all other member variables. | 109 // NOTE: Weak pointers must be invalidated before all other member variables. |
110 // TODO(mcasas): This class is ref-counted via (Restartable)AudioRendererSink. | |
111 // and that does not seem to go well with this. | |
89 base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_; | 112 base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_; |
90 | 113 |
91 DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl); | 114 DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl); |
92 }; | 115 }; |
93 | 116 |
94 } // namespace media | 117 } // namespace media |
95 | 118 |
96 #endif // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ | 119 #endif // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_ |
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