Sub-sample accurate start of OscillatorNode

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webaudio/ConstantSourceNode.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/webaudio/AudioNodeOutput.h"
@@ skipping 40 matching lines @@
   // The audio thread can't block on this lock, so we call tryLock() instead.
   MutexTryLocker tryLocker(m_processLock);
   if (!tryLocker.locked()) {
     // Too bad - the tryLock() failed.
     outputBus->zero();
     return;
   }
 
   size_t quantumFrameOffset;
   size_t nonSilentFramesToProcess;
+  double startFrameOffset;
 
   // Figure out where in the current rendering quantum that the source is
   // active and for how many frames.
   updateSchedulingInfo(framesToProcess, outputBus, quantumFrameOffset,
-                       nonSilentFramesToProcess);
+                       nonSilentFramesToProcess, startFrameOffset);
 
   if (!nonSilentFramesToProcess) {
     outputBus->zero();
     return;
   }
 
   if (m_offset->hasSampleAccurateValues()) {
     DCHECK_LE(framesToProcess, m_sampleAccurateValues.size());
     if (framesToProcess <= m_sampleAccurateValues.size()) {
       float* offsets = m_sampleAccurateValues.data();
@@ skipping 70 matching lines @@
 
 ConstantSourceHandler& ConstantSourceNode::constantSourceHandler() const {
   return static_cast<ConstantSourceHandler&>(handler());
 }
 
 AudioParam* ConstantSourceNode::offset() {
   return m_offset;
 }
 
 }  // namespace blink