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| 1 // Copyright 2016 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_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
| 6 #define CONTENT_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
| 7 |
| 8 #include "content/renderer/media/media_stream_audio_source.h" |
| 9 |
| 10 #include "media/base/audio_capturer_source.h" |
| 11 |
| 12 namespace content { |
| 13 |
| 14 // Represents an externally-provided local or remote source of audio data. This |
| 15 // allows users of the public content::MediaStreamApi to provide a |
| 16 // media::AudioCapturerSource to be used as the source of audio data in the |
| 17 // MediaStream framework. Audio data is transported directly to the tracks |
| 18 // (i.e., there is no audio processing). |
| 19 class CONTENT_EXPORT ExternalMediaStreamAudioSource final |
| 20 : NON_EXPORTED_BASE(public MediaStreamAudioSource), |
| 21 NON_EXPORTED_BASE(public media::AudioCapturerSource::CaptureCallback) { |
| 22 public: |
| 23 ExternalMediaStreamAudioSource( |
| 24 scoped_refptr<media::AudioCapturerSource> source, |
| 25 int sample_rate, |
| 26 media::ChannelLayout channel_layout, |
| 27 int frames_per_buffer, |
| 28 bool is_remote); |
| 29 |
| 30 ~ExternalMediaStreamAudioSource() final; |
| 31 |
| 32 private: |
| 33 // MediaStreamAudioSource implementation. |
| 34 bool EnsureSourceIsStarted() final; |
| 35 void EnsureSourceIsStopped() final; |
| 36 |
| 37 // media::AudioCapturerSource::CaptureCallback implementation. |
| 38 void Capture(const media::AudioBus* audio_bus, |
| 39 int audio_delay_milliseconds, |
| 40 double volume, |
| 41 bool key_pressed) final; |
| 42 void OnCaptureError(const std::string& message) final; |
| 43 |
| 44 // The external source provided to the constructor. |
| 45 scoped_refptr<media::AudioCapturerSource> source_; |
| 46 |
| 47 // In debug builds, check that all methods that could cause object graph |
| 48 // or data flow changes are being called on the main thread. |
| 49 base::ThreadChecker thread_checker_; |
| 50 |
| 51 // True once the source has been started successfully. |
| 52 bool was_started_; |
| 53 |
| 54 DISALLOW_COPY_AND_ASSIGN(ExternalMediaStreamAudioSource); |
| 55 }; |
| 56 |
| 57 } // namespace content |
| 58 |
| 59 #endif // CONTENT_RENDERER_MEDIA_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
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