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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_BASE_AUDIO_RENDERER_SINK_H_ | 5 #ifndef MEDIA_BASE_AUDIO_RENDERER_SINK_H_ |
6 #define MEDIA_BASE_AUDIO_RENDERER_SINK_H_ | 6 #define MEDIA_BASE_AUDIO_RENDERER_SINK_H_ |
7 | 7 |
8 #include <stdint.h> | 8 #include <stdint.h> |
9 | 9 |
10 #include <string> | 10 #include <string> |
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86 // Same as AudioRendererSink except that Initialize() and Start() can be called | 86 // Same as AudioRendererSink except that Initialize() and Start() can be called |
87 // again after Stop(). | 87 // again after Stop(). |
88 // TODO(sandersd): Fold back into AudioRendererSink once all subclasses support | 88 // TODO(sandersd): Fold back into AudioRendererSink once all subclasses support |
89 // this. | 89 // this. |
90 | 90 |
91 class RestartableAudioRendererSink : public AudioRendererSink { | 91 class RestartableAudioRendererSink : public AudioRendererSink { |
92 protected: | 92 protected: |
93 ~RestartableAudioRendererSink() override {} | 93 ~RestartableAudioRendererSink() override {} |
94 }; | 94 }; |
95 | 95 |
96 class SwitchableAudioRendererSink : public RestartableAudioRendererSink { | |
97 public: | |
98 // Attempts to switch the audio output device. | |
99 // Once the attempt is finished, |callback| is invoked with the | |
100 // result of the operation passed as a parameter. The result is a value from | |
101 // the media::SwitchOutputDeviceResult enum. | |
Guido Urdaneta
2016/03/17 17:38:24
s/media::SwitchOutputDeviceResult/media::OutputDev
o1ka
2016/03/18 10:45:40
Done.
| |
102 // There is no guarantee about the thread where |callback| will | |
103 // be invoked, so users are advised to use media::BindToCurrentLoop() to | |
104 // ensure that |callback| runs on the correct thread. | |
105 // Note also that copy constructors and destructors for arguments bound to | |
106 // |callback| may run on arbitrary threads as |callback| is moved across | |
107 // threads. It is advisable to bind arguments such that they are released by | |
108 // |callback| when it runs in order to avoid surprises. | |
109 virtual void SwitchOutputDevice(const std::string& device_id, | |
110 const url::Origin& security_origin, | |
111 const SwitchOutputDeviceCB& callback) = 0; | |
112 | |
113 protected: | |
114 ~SwitchableAudioRendererSink() override {} | |
115 }; | |
116 | |
96 } // namespace media | 117 } // namespace media |
97 | 118 |
98 #endif // MEDIA_BASE_AUDIO_RENDERER_SINK_H_ | 119 #endif // MEDIA_BASE_AUDIO_RENDERER_SINK_H_ |
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