Implementation of 'AudioContext.getOutputTimestamp' method

third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp

 /*
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 28 matching lines @@
       m_currentSampleFrame(0) {
   addInput();
 }
 
 AudioDestinationHandler::~AudioDestinationHandler() {
   DCHECK(!isInitialized());
 }
 
 void AudioDestinationHandler::render(AudioBus* sourceBus,
                                      AudioBus* destinationBus,
-                                     size_t numberOfFrames) {
+                                     size_t numberOfFrames,
+                                     const AudioIOPosition& outputPosition) {
   // We don't want denormals slowing down any of the audio processing
   // since they can very seriously hurt performance.  This will take care of all
   // AudioNodes because they all process within this scope.
   DenormalDisabler denormalDisabler;
 
   // Need to check if the context actually alive. Otherwise the subsequent
   // steps will fail. If the context is not alive somehow, return immediately
   // and do nothing.
   //
   // TODO(hongchan): because the context can go away while rendering, so this
   // check cannot guarantee the safe execution of the following steps.
   DCHECK(context());
   if (!context())
     return;
 
   context()->deferredTaskHandler().setAudioThreadToCurrentThread();
 
   // If the destination node is not initialized, pass the silence to the final
   // audio destination (one step before the FIFO). This check is for the case
   // where the destination is in the middle of tearing down process.
   if (!isInitialized()) {
     destinationBus->zero();
     return;
   }
 
   // Let the context take care of any business at the start of each render
   // quantum.
-  context()->handlePreRenderTasks();
+  context()->handlePreRenderTasks(outputPosition);
 
   // Prepare the local audio input provider for this render quantum.
   if (sourceBus)
     m_localAudioInputProvider.set(sourceBus);
 
   DCHECK_GE(numberOfInputs(), 1u);
   if (numberOfInputs() < 1) {
     destinationBus->zero();
     return;
   }
@@ skipping 28 matching lines @@
 
 AudioDestinationHandler& AudioDestinationNode::audioDestinationHandler() const {
   return static_cast<AudioDestinationHandler&>(handler());
 }
 
 unsigned long AudioDestinationNode::maxChannelCount() const {
   return audioDestinationHandler().maxChannelCount();
 }
 
 }  // namespace blink