Support for AudioContextOptions latencyHint.

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

 /*
  * Copyright (C) 2012, 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 51 matching lines @@
       node, mediaStream, audioTrack, std::move(audioSourceProvider)));
 }
 
 MediaStreamAudioSourceHandler::~MediaStreamAudioSourceHandler() {
   uninitialize();
 }
 
 void MediaStreamAudioSourceHandler::setFormat(size_t numberOfChannels,
                                               float sourceSampleRate) {
   if (numberOfChannels != m_sourceNumberOfChannels ||
-      sourceSampleRate != sampleRate()) {
+      sourceSampleRate != context()->sampleRate()) {
     // The sample-rate must be equal to the context's sample-rate.
     if (!numberOfChannels ||
         numberOfChannels > BaseAudioContext::maxNumberOfChannels() ||
-        sourceSampleRate != sampleRate()) {
+        sourceSampleRate != context()->sampleRate()) {
       // process() will generate silence for these uninitialized values.
       DLOG(ERROR) << "setFormat(" << numberOfChannels << ", "
                   << sourceSampleRate << ") - unhandled format change";
       m_sourceNumberOfChannels = 0;
       return;
     }
 
     // Synchronize with process().
     MutexLocker locker(m_processLock);
 
@@ skipping 105 matching lines @@
 MediaStream* MediaStreamAudioSourceNode::getMediaStream() const {
   return mediaStreamAudioSourceHandler().getMediaStream();
 }
 
 void MediaStreamAudioSourceNode::setFormat(size_t numberOfChannels,
                                            float sourceSampleRate) {
   mediaStreamAudioSourceHandler().setFormat(numberOfChannels, sourceSampleRate);
 }
 
 }  // namespace blink