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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 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 // An AudioInputStream which provides a loop-back of all audio output generated | 5 // An AudioInputStream which provides a loop-back of all audio output generated |
6 // by the entire RenderFrame tree associated with a WebContents instance. The | 6 // by the entire RenderFrame tree associated with a WebContents instance. The |
7 // single stream of data is produced by format-converting and mixing all audio | 7 // single stream of data is produced by format-converting and mixing all audio |
8 // output streams. As the RenderFrameHost tree mutates (e.g., due to page | 8 // output streams. As the RenderFrameHost tree mutates (e.g., due to page |
9 // navigations, or crashes/reloads), the stream will continue without | 9 // navigations, or crashes/reloads), the stream will continue without |
10 // interruption. In other words, WebContentsAudioInputStream provides tab-level | 10 // interruption. In other words, WebContentsAudioInputStream provides tab-level |
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30 | 30 |
31 namespace content { | 31 namespace content { |
32 | 32 |
33 class AudioMirroringManager; | 33 class AudioMirroringManager; |
34 class WebContentsTracker; | 34 class WebContentsTracker; |
35 | 35 |
36 class CONTENT_EXPORT WebContentsAudioInputStream | 36 class CONTENT_EXPORT WebContentsAudioInputStream |
37 : NON_EXPORTED_BASE(public media::AudioInputStream) { | 37 : NON_EXPORTED_BASE(public media::AudioInputStream) { |
38 public: | 38 public: |
39 // media::AudioInputStream implementation | 39 // media::AudioInputStream implementation |
40 virtual bool Open() OVERRIDE; | 40 virtual bool Open() override; |
41 virtual void Start(AudioInputCallback* callback) OVERRIDE; | 41 virtual void Start(AudioInputCallback* callback) override; |
42 virtual void Stop() OVERRIDE; | 42 virtual void Stop() override; |
43 virtual void Close() OVERRIDE; | 43 virtual void Close() override; |
44 virtual double GetMaxVolume() OVERRIDE; | 44 virtual double GetMaxVolume() override; |
45 virtual void SetVolume(double volume) OVERRIDE; | 45 virtual void SetVolume(double volume) override; |
46 virtual double GetVolume() OVERRIDE; | 46 virtual double GetVolume() override; |
47 virtual void SetAutomaticGainControl(bool enabled) OVERRIDE; | 47 virtual void SetAutomaticGainControl(bool enabled) override; |
48 virtual bool GetAutomaticGainControl() OVERRIDE; | 48 virtual bool GetAutomaticGainControl() override; |
49 | 49 |
50 // Create a new audio mirroring session, or return NULL on error. |device_id| | 50 // Create a new audio mirroring session, or return NULL on error. |device_id| |
51 // should be in the format accepted by | 51 // should be in the format accepted by |
52 // WebContentsCaptureUtil::ExtractTabCaptureTarget(). The caller must | 52 // WebContentsCaptureUtil::ExtractTabCaptureTarget(). The caller must |
53 // guarantee Close() is called on the returned object so that it may | 53 // guarantee Close() is called on the returned object so that it may |
54 // self-destruct. | 54 // self-destruct. |
55 // |worker_task_runner| is the task runner on which AudioInputCallback methods | 55 // |worker_task_runner| is the task runner on which AudioInputCallback methods |
56 // are called and may or may not be the single thread that invokes the | 56 // are called and may or may not be the single thread that invokes the |
57 // AudioInputStream methods. | 57 // AudioInputStream methods. |
58 static WebContentsAudioInputStream* Create( | 58 static WebContentsAudioInputStream* Create( |
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80 virtual ~WebContentsAudioInputStream(); | 80 virtual ~WebContentsAudioInputStream(); |
81 | 81 |
82 scoped_refptr<Impl> impl_; | 82 scoped_refptr<Impl> impl_; |
83 | 83 |
84 DISALLOW_COPY_AND_ASSIGN(WebContentsAudioInputStream); | 84 DISALLOW_COPY_AND_ASSIGN(WebContentsAudioInputStream); |
85 }; | 85 }; |
86 | 86 |
87 } // namespace content | 87 } // namespace content |
88 | 88 |
89 #endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_AUDIO_INPUT_STREAM_H_ | 89 #endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_AUDIO_INPUT_STREAM_H_ |
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