| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_RENDERER_MEDIA_STREAM_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
| #define CONTENT_RENDERER_MEDIA_STREAM_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |
| |
| #include "content/renderer/media/stream/media_stream_audio_source.h" |
| |
| #include "media/base/audio_capturer_source.h" |
| |
| namespace content { |
| |
| // Represents an externally-provided local or remote source of audio data. This |
| // allows users of the public content::MediaStreamApi to provide a |
| // media::AudioCapturerSource to be used as the source of audio data in the |
| // MediaStream framework. Audio data is transported directly to the tracks |
| // (i.e., there is no audio processing). |
| class CONTENT_EXPORT ExternalMediaStreamAudioSource final |
| : public MediaStreamAudioSource, |
| public media::AudioCapturerSource::CaptureCallback { |
| public: |
| ExternalMediaStreamAudioSource( |
| scoped_refptr<media::AudioCapturerSource> source, |
| int sample_rate, |
| media::ChannelLayout channel_layout, |
| int frames_per_buffer, |
| bool is_remote); |
| |
| ~ExternalMediaStreamAudioSource() final; |
| |
| private: |
| // MediaStreamAudioSource implementation. |
| bool EnsureSourceIsStarted() final; |
| void EnsureSourceIsStopped() final; |
| |
| // media::AudioCapturerSource::CaptureCallback implementation. |
| void Capture(const media::AudioBus* audio_bus, |
| int audio_delay_milliseconds, |
| double volume, |
| bool key_pressed) final; |
| void OnCaptureError(const std::string& message) final; |
| void OnCaptureMuted(bool is_muted) final; |
| |
| // The external source provided to the constructor. |
| scoped_refptr<media::AudioCapturerSource> source_; |
| |
| // In debug builds, check that all methods that could cause object graph |
| // or data flow changes are being called on the main thread. |
| base::ThreadChecker thread_checker_; |
| |
| // True once the source has been started successfully. |
| bool was_started_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ExternalMediaStreamAudioSource); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_STREAM_EXTERNAL_MEDIA_STREAM_AUDIO_SOURCE_H_ |