Index: content/renderer/media/html_audio_element_capturer_source.h |
diff --git a/content/renderer/media/html_audio_element_capturer_source.h b/content/renderer/media/html_audio_element_capturer_source.h |
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index 0000000000000000000000000000000000000000..eb6ecac63af268ad83b7b6dadc4cc190d07666c8 |
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+++ b/content/renderer/media/html_audio_element_capturer_source.h |
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+// 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_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |
+#define CONTENT_RENDERER_MEDIA_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |
+ |
+#include "base/callback.h" |
+#include "base/memory/ref_counted.h" |
+#include "base/memory/weak_ptr.h" |
+#include "base/single_thread_task_runner.h" |
+#include "base/threading/thread_checker.h" |
+#include "content/common/content_export.h" |
+#include "media/base/audio_capturer_source.h" |
+#include "media/base/audio_converter.h" |
+#include "media/blink/webaudiosourceprovider_impl.h" |
+ |
+#if !defined(ENABLE_WEBRTC) |
+#error "Testing testing" |
+#endif |
+ |
+namespace blink { |
+class WebMediaPlayer; |
+} // namespace blink |
+ |
+namespace media { |
+class AudioBus; |
+class AudioFifo; |
+} // namespace media |
+ |
+namespace content { |
+ |
+// This class is an AudioCapturerSource registering to the constructor-passed |
+// weak WebAudioSourceProviderImpl to receive a copy of the audio data intended |
+// for rendering. This copied data is received on OnAudioBus(), converted and |
+// sent to |capture_callback_| |
+class CONTENT_EXPORT HtmlAudioElementCapturerSource final |
+ : NON_EXPORTED_BASE(public media::AudioCapturerSource), |
+ NON_EXPORTED_BASE(public media::AudioConverter::InputCallback) { |
+ public: |
+ static scoped_refptr<HtmlAudioElementCapturerSource> |
+ CreateFromWebMediaPlayerImpl(blink::WebMediaPlayer* player); |
+ |
+ explicit HtmlAudioElementCapturerSource( |
+ const base::WeakPtr<media::WebAudioSourceProviderImpl>& audio_source); |
+ |
+ // media::AudioCapturerSource Implementation. |
+ void Initialize(const media::AudioParameters& params, |
+ CaptureCallback* callback, |
+ int session_id) override; |
+ void Start() override; |
+ void Stop() override; |
+ void SetVolume(double volume) override; |
+ void SetAutomaticGainControl(bool enable) override; |
+ |
+ // To act as an WebAudioSourceProviderImpl::CopyAudioCB. |
+ void OnAudioBus(std::unique_ptr<media::AudioBus> audio_bus, |
miu
2016/05/13 23:40:35
Seems like this should be a private method since i
mcasas
2016/05/14 02:23:47
Done.
|
+ uint32_t delay_milliseconds, |
+ int sample_rate); |
+ |
+ // media::AudioConverted::InputCallback implementation. |
+ double ProvideInput(media::AudioBus* audio_bus, |
miu
2016/05/13 23:40:35
Looks like this is for exclusive use by |converter
mcasas
2016/05/14 02:23:47
Done.
|
+ base::TimeDelta buffer_delay) override; |
+ |
+ private: |
+ ~HtmlAudioElementCapturerSource() override; |
+ void CreateConverter(); |
+ |
+ const media::WebAudioSourceProviderImpl::CopyAudioCB audio_input_cb_; |
+ |
+ base::WeakPtr<media::WebAudioSourceProviderImpl> audio_source_; |
+ |
+ media::AudioParameters input_params_; // Format we see ingressing. |
+ media::AudioParameters output_params_; // Format we need to egress. |
+ |
+ // Sampling rate adapter between |input_params_| and |output_params_|. |
+ std::unique_ptr<media::AudioConverter> converter_; |
+ std::unique_ptr<media::AudioFifo> fifo_; |
+ int min_fifo_frames_for_conversion_; |
+ |
+ CaptureCallback* capture_callback_; |
+ |
+ base::ThreadChecker thread_checker_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(HtmlAudioElementCapturerSource); |
+}; |
+ |
+} // namespace content |
+ |
+#endif // CONTENT_RENDERER_MEDIA_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ |