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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_CAPTURER_SOURCE_H_ | 5 #ifndef MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_ |
6 #define MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_ | 6 #define MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 #include <vector> | 9 #include <vector> |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
11 #include "media/base/audio_bus.h" | 11 #include "media/base/audio_bus.h" |
12 #include "media/base/audio_parameters.h" | 12 #include "media/base/audio_parameters.h" |
13 #include "media/base/media_export.h" | 13 #include "media/base/media_export.h" |
14 | 14 |
15 namespace media { | 15 namespace media { |
16 | 16 |
17 // AudioCapturerSource is an interface representing the source for | 17 // AudioCapturerSource is an interface representing the source for |
18 // captured audio. An implementation will periodically call Capture() on a | 18 // captured audio. An implementation will periodically call Capture() on a |
19 // callback object. | 19 // callback object. |
20 class AudioCapturerSource | 20 class AudioCapturerSource |
21 : public base::RefCountedThreadSafe<media::AudioCapturerSource> { | 21 : public base::RefCountedThreadSafe<media::AudioCapturerSource> { |
22 public: | 22 public: |
23 class CaptureCallback { | 23 class CaptureCallback { |
24 public: | 24 public: |
| 25 // Signals that audio recording has been started. Called asynchronously |
| 26 // after Start() has completed. If Start() encounters problems before this |
| 27 // callback can be made, OnCaptureError will be called instead. |
| 28 virtual void OnCaptureStarted() = 0; |
| 29 |
25 // Callback to deliver the captured data from the OS. | 30 // Callback to deliver the captured data from the OS. |
26 // TODO(chcunningham): Update delay argument to use frames instead of | 31 // TODO(chcunningham): Update delay argument to use frames instead of |
27 // milliseconds to prevent loss of precision. See http://crbug.com/587291. | 32 // milliseconds to prevent loss of precision. See http://crbug.com/587291. |
28 virtual void Capture(const AudioBus* audio_source, | 33 virtual void Capture(const AudioBus* audio_source, |
29 int audio_delay_milliseconds, | 34 int audio_delay_milliseconds, |
30 double volume, | 35 double volume, |
31 bool key_pressed) = 0; | 36 bool key_pressed) = 0; |
32 | 37 |
33 // Signals an error has occurred. | 38 // Signals an error has occurred. |
34 virtual void OnCaptureError(const std::string& message) = 0; | 39 virtual void OnCaptureError(const std::string& message) = 0; |
(...skipping 26 matching lines...) Expand all Loading... |
61 virtual void SetAutomaticGainControl(bool enable) = 0; | 66 virtual void SetAutomaticGainControl(bool enable) = 0; |
62 | 67 |
63 protected: | 68 protected: |
64 friend class base::RefCountedThreadSafe<AudioCapturerSource>; | 69 friend class base::RefCountedThreadSafe<AudioCapturerSource>; |
65 virtual ~AudioCapturerSource() {} | 70 virtual ~AudioCapturerSource() {} |
66 }; | 71 }; |
67 | 72 |
68 } // namespace media | 73 } // namespace media |
69 | 74 |
70 #endif // MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_ | 75 #endif // MEDIA_BASE_AUDIO_CAPTURER_SOURCE_H_ |
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