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| 1 // Copyright 2014 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 CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_AUDIO_MUTER_H_ |
| 6 #define CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_AUDIO_MUTER_H_ |
| 7 |
| 8 #include "base/memory/ref_counted.h" |
| 9 |
| 10 namespace content { |
| 11 |
| 12 class WebContents; |
| 13 |
| 14 // Mutes all audio output from a WebContents. Internally, this is accomplished |
| 15 // by providing a MirroringDestination implementation, similar to that found in |
| 16 // WebContentsAudioInputStream for audio capture/mirroring. However, the |
| 17 // WebContentsAudioMuter::MuteDestination only pumps the audio data and discards |
| 18 // it. |
| 19 class WebContentsAudioMuter { |
| 20 public: |
| 21 explicit WebContentsAudioMuter(WebContents* web_contents); |
| 22 ~WebContentsAudioMuter(); |
| 23 |
| 24 bool is_muting() const { return is_muting_; } |
| 25 |
| 26 void StartMuting(); |
| 27 void StopMuting(); |
| 28 |
| 29 private: |
| 30 // AudioMirroringManager::MirroringDestination implementation which is |
| 31 // ref-counted so it remains alive as tasks referencing it are posted on both |
| 32 // the UI and IO threads. |
| 33 class MuteDestination; |
| 34 const scoped_refptr<MuteDestination> destination_; |
| 35 |
| 36 bool is_muting_; |
| 37 |
| 38 DISALLOW_COPY_AND_ASSIGN(WebContentsAudioMuter); |
| 39 }; |
| 40 |
| 41 } // namespace content |
| 42 |
| 43 #endif // CONTENT_BROWSER_MEDIA_CAPTURE_WEB_CONTENTS_AUDIO_MUTER_H_ |
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