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Side by Side Diff: media/audio/virtual_audio_sink.h

Issue 1897953003: Unmute Tab Audio For Desktop Share (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Unittest Created 4 years, 7 months ago
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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 MEDIA_AUDIO_VIRTUAL_AUDIO_SINK_H_
6 #define MEDIA_AUDIO_VIRTUAL_AUDIO_SINK_H_
7
8 #include "base/callback.h"
9 #include "base/macros.h"
10 #include "media/audio/audio_io.h"
11 #include "media/audio/audio_source_diverter.h"
12 #include "media/base/audio_converter.h"
13 #include "media/base/audio_shifter.h"
14
15 namespace media {
16
17 class VirtualAudioInputStream;
18
19 // This class is an adapter between push model and pull model for audio stream.
20 // Audio provider calls OnData() to push audio data into this class.
21 // Audio consumer calls ProvideInput() to pull audio data.
22 class MEDIA_EXPORT VirtualAudioSink : public AudioPushSink,
23 public AudioConverter::InputCallback {
24 public:
25 typedef base::Callback<void(VirtualAudioSink* sink)> AfterCloseCallback;
26
27 // Construct an audio loopback pathway to the given |target| (not owned).
28 // |target| must outlive this instance.
29 VirtualAudioSink(AudioParameters param,
30 VirtualAudioInputStream* target,
31 AfterCloseCallback callback);
32 ~VirtualAudioSink() override;
33
34 // AudioPushSink
35 void Close() override;
36 void OnData(const AudioBus& source, base::TimeTicks reference_time) override;
37
38 // AudioConverter::InputCallback
39 double ProvideInput(AudioBus* audio_bus,
40 base::TimeDelta buffer_delay) override;
41
42 private:
43 const AudioParameters params_;
44 VirtualAudioInputStream* const target_;
45 AudioShifter shifter_;
46 AfterCloseCallback after_close_callback_;
47 };
48
49 } // namespace media
50
51 #endif // MEDIA_AUDIO_VIRTUAL_AUDIO_SINK_H_
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