Implementation of 'AudioContext.getOutputTimestamp' method

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

Index: third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp b/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
index f5eea247a774b645966ee5b6ccb6e35cf9056108..469e054d031fa0b76c0fa2ff6c17166d8dcd64d5 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioDestinationNode.cpp
@@ -23,6 +23,7 @@
  */
 
 #include "modules/webaudio/AudioDestinationNode.h"
+
 #include "modules/webaudio/AbstractAudioContext.h"
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
@@ -44,7 +45,7 @@ AudioDestinationHandler::~AudioDestinationHandler()
     ASSERT(!isInitialized());
 }
 
-void AudioDestinationHandler::render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFrames)
+void AudioDestinationHandler::render(AudioBus* sourceBus, AudioBus* destinationBus, size_t numberOfFrames, const WebAudioTimestamp& outputTimestamp)
 {
     // We don't want denormals slowing down any of the audio processing
     // since they can very seriously hurt performance.
@@ -74,6 +75,9 @@ void AudioDestinationHandler::render(AudioBus* sourceBus, AudioBus* destinationB
     // Let the context take care of any business at the start of each render quantum.
     context()->handlePreRenderTasks();
 
+    // Set the output device audio stream timestamp.
+    context()->setWebAudioTimestamp(outputTimestamp);

[hongchan, 2016/06/20 16:05:21]

I prefer to have this inside of handlePreRenderTasks(). This is a part of
pre-render task.

+
     // Prepare the local audio input provider for this render quantum.
     if (sourceBus)
         m_localAudioInputProvider.set(sourceBus);