OLD | NEW |
---|---|
(Empty) | |
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_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ | |
6 #define CONTENT_RENDERER_MEDIA_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ | |
7 | |
8 #include "base/callback.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/memory/weak_ptr.h" | |
11 #include "base/single_thread_task_runner.h" | |
12 #include "base/threading/thread_checker.h" | |
13 #include "content/common/content_export.h" | |
14 #include "media/base/audio_capturer_source.h" | |
15 #include "media/base/audio_converter.h" | |
16 #include "media/blink/webaudiosourceprovider_impl.h" | |
17 | |
18 #if !defined(ENABLE_WEBRTC) | |
19 #error "Testing testing" | |
20 #endif | |
21 | |
22 namespace blink { | |
23 class WebMediaPlayer; | |
24 } // namespace blink | |
25 | |
26 namespace media { | |
27 class AudioBus; | |
28 class AudioFifo; | |
29 } // namespace media | |
30 | |
31 namespace content { | |
32 | |
33 // This class is an AudioCapturerSource registering to the constructor-passed | |
34 // weak WebAudioSourceProviderImpl to receive a copy of the audio data intended | |
35 // for rendering. This copied data is received on OnAudioBus(), converted and | |
36 // sent to |capture_callback_| | |
37 class CONTENT_EXPORT HtmlAudioElementCapturerSource final | |
38 : NON_EXPORTED_BASE(public media::AudioCapturerSource), | |
39 NON_EXPORTED_BASE(public media::AudioConverter::InputCallback) { | |
40 public: | |
41 static scoped_refptr<HtmlAudioElementCapturerSource> | |
42 CreateFromWebMediaPlayerImpl(blink::WebMediaPlayer* player); | |
43 | |
44 explicit HtmlAudioElementCapturerSource( | |
45 const base::WeakPtr<media::WebAudioSourceProviderImpl>& audio_source); | |
46 | |
47 // media::AudioCapturerSource Implementation. | |
48 void Initialize(const media::AudioParameters& params, | |
49 CaptureCallback* callback, | |
50 int session_id) override; | |
51 void Start() override; | |
52 void Stop() override; | |
53 void SetVolume(double volume) override; | |
54 void SetAutomaticGainControl(bool enable) override; | |
55 | |
56 // To act as an WebAudioSourceProviderImpl::CopyAudioCB. | |
57 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.
| |
58 uint32_t delay_milliseconds, | |
59 int sample_rate); | |
60 | |
61 // media::AudioConverted::InputCallback implementation. | |
62 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.
| |
63 base::TimeDelta buffer_delay) override; | |
64 | |
65 private: | |
66 ~HtmlAudioElementCapturerSource() override; | |
67 void CreateConverter(); | |
68 | |
69 const media::WebAudioSourceProviderImpl::CopyAudioCB audio_input_cb_; | |
70 | |
71 base::WeakPtr<media::WebAudioSourceProviderImpl> audio_source_; | |
72 | |
73 media::AudioParameters input_params_; // Format we see ingressing. | |
74 media::AudioParameters output_params_; // Format we need to egress. | |
75 | |
76 // Sampling rate adapter between |input_params_| and |output_params_|. | |
77 std::unique_ptr<media::AudioConverter> converter_; | |
78 std::unique_ptr<media::AudioFifo> fifo_; | |
79 int min_fifo_frames_for_conversion_; | |
80 | |
81 CaptureCallback* capture_callback_; | |
82 | |
83 base::ThreadChecker thread_checker_; | |
84 | |
85 DISALLOW_COPY_AND_ASSIGN(HtmlAudioElementCapturerSource); | |
86 }; | |
87 | |
88 } // namespace content | |
89 | |
90 #endif // CONTENT_RENDERER_MEDIA_HTML_AUDIO_ELEMENT_CAPTURER_SOURCE_H_ | |
OLD | NEW |