Implementation of 'AudioContext.getOutputTimestamp' method

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

Index: third_party/WebKit/Source/platform/audio/AudioDestination.cpp
diff --git a/third_party/WebKit/Source/platform/audio/AudioDestination.cpp b/third_party/WebKit/Source/platform/audio/AudioDestination.cpp
index 53c329f641c17533c2589b3cd08de38e5b39b820..f54a7ce416ac7251c5f541213e67a1d07173bf3d 100644
--- a/third_party/WebKit/Source/platform/audio/AudioDestination.cpp
+++ b/third_party/WebKit/Source/platform/audio/AudioDestination.cpp
@@ -146,8 +146,9 @@ unsigned long AudioDestination::maxChannelCount()
     return static_cast<float>(Platform::current()->audioHardwareOutputChannels());
 }
 
-void AudioDestination::render(const WebVector<float*>& sourceData, const WebVector<float*>& audioData, size_t numberOfFrames)
+void AudioDestination::render(const WebVector<float*>& sourceData, const WebVector<float*>& audioData, size_t numberOfFrames, const WebAudioTimestamp& timestamp)
 {
+    m_outputTimestamp = timestamp;

[Raymond Toy, 2016/06/14 16:42:40]

Does this need to be protected by the mutex?

[Mikhail, 2016/06/17 09:36:57]

it looks like here it is always accessed on the same thread

     bool isNumberOfChannelsGood = audioData.size() == m_numberOfOutputChannels;
     if (!isNumberOfChannelsGood) {
         ASSERT_NOT_REACHED();
@@ -183,7 +184,7 @@ void AudioDestination::provideInput(AudioBus* bus, size_t framesToProcess)
         sourceBus = m_inputBus.get();
     }
 
-    m_callback.render(sourceBus, bus, framesToProcess);
+    m_callback.render(sourceBus, bus, framesToProcess, m_outputTimestamp);
 }
 
 } // namespace blink