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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 |
| (...skipping 17 matching lines...) Expand all Loading... |
| 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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