Use kRenderQuantumFrames in more places

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

 /*
  * Copyright (C) 2011, 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 13 matching lines @@
  */
 
 #include "modules/webaudio/OfflineAudioDestinationNode.h"
 
 #include "core/dom/ExecutionContextTask.h"
 #include "modules/webaudio/AudioNodeInput.h"
 #include "modules/webaudio/AudioNodeOutput.h"
 #include "modules/webaudio/BaseAudioContext.h"
 #include "modules/webaudio/OfflineAudioContext.h"
 #include "platform/audio/AudioBus.h"
+#include "platform/audio/AudioUtilities.h"
 #include "platform/audio/DenormalDisabler.h"
 #include "platform/audio/HRTFDatabaseLoader.h"
 #include "public/platform/Platform.h"
 #include "wtf/PtrUtil.h"
 #include <algorithm>
 
 namespace blink {
 
-const size_t OfflineAudioDestinationHandler::renderQuantumSize = 128;
-
 OfflineAudioDestinationHandler::OfflineAudioDestinationHandler(
     AudioNode& node,
     AudioBuffer* renderTarget)
     : AudioDestinationHandler(node, renderTarget->sampleRate()),
       m_renderTarget(renderTarget),
       m_renderThread(wrapUnique(
           Platform::current()->createThread("offline audio renderer"))),
       m_framesProcessed(0),
       m_framesToProcess(0),
       m_isRenderingStarted(false),
       m_shouldSuspend(false) {
-  m_renderBus =
-      AudioBus::create(renderTarget->numberOfChannels(), renderQuantumSize);
+  m_renderBus = AudioBus::create(renderTarget->numberOfChannels(),
+                                 AudioUtilities::kRenderQuantumFrames);
   m_framesToProcess = m_renderTarget->length();
 
   // Node-specific defaults.
   m_channelCount = m_renderTarget->numberOfChannels();
   setInternalChannelCountMode(Explicit);
   setInternalChannelInterpretation(AudioBus::Speakers);
 }
 
 PassRefPtr<OfflineAudioDestinationHandler>
 OfflineAudioDestinationHandler::create(AudioNode& node,
@@ skipping 83 matching lines @@
   DCHECK(isAudioContextInitialized);
   if (!isAudioContextInitialized)
     return;
 
   bool channelsMatch =
       m_renderBus->numberOfChannels() == m_renderTarget->numberOfChannels();
   DCHECK(channelsMatch);
   if (!channelsMatch)
     return;
 
-  bool isRenderBusAllocated = m_renderBus->length() >= renderQuantumSize;
+  bool isRenderBusAllocated =
+      m_renderBus->length() >= AudioUtilities::kRenderQuantumFrames;
   DCHECK(isRenderBusAllocated);
   if (!isRenderBusAllocated)
     return;
 
   // Start rendering.
   doOfflineRendering();
 }
 
 void OfflineAudioDestinationHandler::doOfflineRendering() {
   DCHECK(!isMainThread());
 
   unsigned numberOfChannels = m_renderTarget->numberOfChannels();
 
   // Reset the suspend flag.
   m_shouldSuspend = false;
 
   // If there is more to process and there is no suspension at the moment,
   // do continue to render quanta. Then calling OfflineAudioContext.resume()
   // will pick up the render loop again from where it was suspended.
   while (m_framesToProcess > 0 && !m_shouldSuspend) {
     // Suspend the rendering and update m_shouldSuspend if a scheduled
     // suspend found at the current sample frame. Otherwise render one
     // quantum and return false.
-    m_shouldSuspend =
-        renderIfNotSuspended(0, m_renderBus.get(), renderQuantumSize);
+    m_shouldSuspend = renderIfNotSuspended(
+        0, m_renderBus.get(), AudioUtilities::kRenderQuantumFrames);
 
     if (m_shouldSuspend)
       return;
 
     size_t framesAvailableToCopy =
-        std::min(m_framesToProcess, renderQuantumSize);
+        std::min(m_framesToProcess,
+                 static_cast<size_t>(AudioUtilities::kRenderQuantumFrames));
 
     for (unsigned channelIndex = 0; channelIndex < numberOfChannels;
          ++channelIndex) {
       const float* source = m_renderBus->channel(channelIndex)->data();
       float* destination = m_renderTarget->getChannelData(channelIndex)->data();
       memcpy(destination + m_framesProcessed, source,
              sizeof(float) * framesAvailableToCopy);
     }
 
     m_framesProcessed += framesAvailableToCopy;
@@ skipping 127 matching lines @@
   setHandler(OfflineAudioDestinationHandler::create(*this, renderTarget));
 }
 
 OfflineAudioDestinationNode* OfflineAudioDestinationNode::create(
     BaseAudioContext* context,
     AudioBuffer* renderTarget) {
   return new OfflineAudioDestinationNode(*context, renderTarget);
 }
 
 }  // namespace blink