| // 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_CAPTURE_FROM_ELEMENT_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |
| #define CONTENT_RENDERER_MEDIA_CAPTURE_FROM_ELEMENT_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |
| |
| #include "base/callback.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/thread_checker.h" |
| #include "content/common/content_export.h" |
| #include "content/renderer/media/stream/media_stream_audio_source.h" |
| |
| namespace blink { |
| class WebMediaPlayer; |
| } // namespace blink |
| |
| namespace media { |
| class AudioBus; |
| class WebAudioSourceProviderImpl; |
| } // namespace media |
| |
| namespace content { |
| |
| // This class is a MediaStreamAudioSource that registers to the constructor- |
| // passed weak WebAudioSourceProviderImpl to receive a copy of the audio data |
| // intended for rendering. This copied data is received on OnAudioBus() and sent |
| // to all the registered Tracks. |
| class CONTENT_EXPORT HtmlAudioElementCapturerSource final |
| : public MediaStreamAudioSource { |
| public: |
| static HtmlAudioElementCapturerSource* |
| CreateFromWebMediaPlayerImpl(blink::WebMediaPlayer* player); |
| |
| explicit HtmlAudioElementCapturerSource( |
| media::WebAudioSourceProviderImpl* audio_source); |
| ~HtmlAudioElementCapturerSource() override; |
| |
| private: |
| // MediaStreamAudioSource implementation. |
| bool EnsureSourceIsStarted() final; |
| void EnsureSourceIsStopped() final; |
| void SetAudioCallback(); |
| |
| // To act as an WebAudioSourceProviderImpl::CopyAudioCB. |
| void OnAudioBus(std::unique_ptr<media::AudioBus> audio_bus, |
| uint32_t frames_delayed, |
| int sample_rate); |
| |
| scoped_refptr<media::WebAudioSourceProviderImpl> audio_source_; |
| |
| bool is_started_; |
| int last_sample_rate_; |
| int last_num_channels_; |
| int last_bus_frames_; |
| |
| base::ThreadChecker thread_checker_; |
| |
| base::WeakPtrFactory<HtmlAudioElementCapturerSource> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HtmlAudioElementCapturerSource); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_CAPTURE_FROM_ELEMENT_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |