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Side by Side Diff: third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.h

Issue 2060833002: Implementation of 'AudioContext.getOutputTimestamp' method (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Added implementation for ALSA. Created 4 years, 5 months ago
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1 /* 1 /*
2 * Copyright (C) 2010, Google Inc. All rights reserved. 2 * Copyright (C) 2010, Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 1. Redistributions of source code must retain the above copyright 7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer. 8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright 9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the 10 * notice, this list of conditions and the following disclaimer in the
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28 #include "modules/webaudio/AudioBuffer.h" 28 #include "modules/webaudio/AudioBuffer.h"
29 #include "modules/webaudio/AudioNode.h" 29 #include "modules/webaudio/AudioNode.h"
30 #include "platform/audio/AudioBus.h" 30 #include "platform/audio/AudioBus.h"
31 #include "platform/audio/AudioIOCallback.h" 31 #include "platform/audio/AudioIOCallback.h"
32 #include "platform/audio/AudioSourceProvider.h" 32 #include "platform/audio/AudioSourceProvider.h"
33 33
34 namespace blink { 34 namespace blink {
35 35
36 class AudioBus; 36 class AudioBus;
37 class AbstractAudioContext; 37 class AbstractAudioContext;
38 class AudioTimestamp;
38 39
39 class AudioDestinationHandler : public AudioHandler, public AudioIOCallback { 40 class AudioDestinationHandler : public AudioHandler, public AudioIOCallback {
40 public: 41 public:
41 AudioDestinationHandler(AudioNode&, float sampleRate); 42 AudioDestinationHandler(AudioNode&, float sampleRate);
42 ~AudioDestinationHandler() override; 43 ~AudioDestinationHandler() override;
43 44
44 // AudioHandler 45 // AudioHandler
45 void process(size_t) final { } // we're pulled by hardware so this is never called 46 void process(size_t) final { } // we're pulled by hardware so this is never called
46 47
47 // The audio hardware calls render() to get the next render quantum of audio into destinationBus. 48 // The audio hardware calls render() to get the next render quantum of audio into destinationBus.
48 // It will optionally give us local/live audio input in sourceBus (if it's n ot 0). 49 // It will optionally give us local/live audio input in sourceBus (if it's n ot 0).
49 void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFr ames) final; 50 void render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFr ames, const WebAudioTimestamp& outputTimestamp) final;
50 51
51 size_t currentSampleFrame() const { return acquireLoad(&m_currentSampleFrame ); } 52 size_t currentSampleFrame() const { return acquireLoad(&m_currentSampleFrame ); }
52 double currentTime() const { return currentSampleFrame() / static_cast<doubl e>(sampleRate()); } 53 double currentTime() const { return currentSampleFrame() / static_cast<doubl e>(sampleRate()); }
53 54
54 virtual unsigned long maxChannelCount() const { return 0; } 55 virtual unsigned long maxChannelCount() const { return 0; }
55 56
56 virtual void startRendering() = 0; 57 virtual void startRendering() = 0;
57 virtual void stopRendering() = 0; 58 virtual void stopRendering() = 0;
58 59
59 protected: 60 protected:
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98 99
99 unsigned long maxChannelCount() const; 100 unsigned long maxChannelCount() const;
100 101
101 protected: 102 protected:
102 AudioDestinationNode(AbstractAudioContext&); 103 AudioDestinationNode(AbstractAudioContext&);
103 }; 104 };
104 105
105 } // namespace blink 106 } // namespace blink
106 107
107 #endif // AudioDestinationNode_h 108 #endif // AudioDestinationNode_h
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