Implementation of 'AudioContext.getOutputTimestamp' method

third_party/WebKit/Source/platform/audio/AudioDestination.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 47 matching lines @@
     // Port-specific device identification information for live/local input streams can be passed in the inputDeviceId.
     static std::unique_ptr<AudioDestination> create(AudioIOCallback&, const String& inputDeviceId, unsigned numberOfInputChannels, unsigned numberOfOutputChannels, float sampleRate, const PassRefPtr<SecurityOrigin>&);
 
     virtual void start();
     virtual void stop();
     bool isPlaying() { return m_isPlaying; }
 
     float sampleRate() const { return m_sampleRate; }
 
     // WebAudioDevice::RenderCallback
-    void render(const WebVector<float*>& sourceData, const WebVector<float*>& audioData, size_t numberOfFrames) override;
+    void render(const WebVector<float*>& sourceData, const WebVector<float*>& audioData, size_t numberOfFrames, const WebAudioTimestamp&) override;
 
     // AudioSourceProvider
     void provideInput(AudioBus*, size_t framesToProcess) override;
 
     static float hardwareSampleRate();
 
     // maxChannelCount() returns the total number of output channels of the audio hardware.
     // A value of 0 indicates that the number of channels cannot be configured and
     // that only stereo (2-channel) destinations can be created.
     // The numberOfOutputChannels parameter of AudioDestination::create() is allowed to
     // be a value: 1 <= numberOfOutputChannels <= maxChannelCount(),
     // or if maxChannelCount() equals 0, then numberOfOutputChannels must be 2.
     static unsigned long maxChannelCount();
 
 private:
     AudioIOCallback& m_callback;
     unsigned m_numberOfOutputChannels;
     RefPtr<AudioBus> m_inputBus;
     RefPtr<AudioBus> m_renderBus;
     float m_sampleRate;
     bool m_isPlaying;
     std::unique_ptr<WebAudioDevice> m_audioDevice;
     size_t m_callbackBufferSize;
 
     std::unique_ptr<AudioFIFO> m_inputFifo;
     std::unique_ptr<AudioPullFIFO> m_fifo;
+    WebAudioTimestamp m_outputTimestamp;
 };
 
 } // namespace blink
 
 #endif // AudioDestination_h