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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef WEBKIT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_RENDERER_H_ | |
6 #define WEBKIT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_RENDERER_H_ | |
7 | |
8 #include "base/memory/ref_counted.h" | |
9 #include "base/time.h" | |
10 | |
11 namespace webkit_media { | |
12 | |
13 class MediaStreamAudioRenderer | |
14 : public base::RefCountedThreadSafe<MediaStreamAudioRenderer> { | |
15 public: | |
16 // Starts rendering audio. | |
17 virtual void Start() = 0; | |
18 | |
19 // Stops rendering audio. | |
20 virtual void Stop() = 0; | |
21 | |
22 // Resumes rendering audio after being paused. | |
23 virtual void Play() = 0; | |
24 | |
25 // Temporarily suspends rendering audio. The audio stream might still be | |
26 // active but new audio data is not provided to the consumer. | |
27 virtual void Pause() = 0; | |
28 | |
29 // Sets the output volume. | |
30 virtual void SetVolume(float volume) = 0; | |
31 | |
32 // Time stamp that reflects the current render time. Should not be updated | |
33 // when paused. | |
34 virtual base::TimeDelta GetCurrentRenderTime() const = 0; | |
35 | |
36 // Returns true if the implementation is a local renderer and false | |
37 // otherwise. | |
38 virtual bool IsLocalRenderer() const = 0; | |
39 | |
40 protected: | |
41 friend class base::RefCountedThreadSafe<MediaStreamAudioRenderer>; | |
42 | |
43 MediaStreamAudioRenderer(); | |
44 virtual ~MediaStreamAudioRenderer(); | |
45 | |
46 private: | |
47 DISALLOW_COPY_AND_ASSIGN(MediaStreamAudioRenderer); | |
48 }; | |
49 | |
50 } // namespace webkit_media | |
51 | |
52 #endif // WEBKIT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_RENDERER_H_ | |
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