WebAudio: Remove OfflineAudioDestinationNode::m_keepAliveWhileRendering

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 10 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #if ENABLE(WEB_AUDIO)
 
 #include "modules/webaudio/OfflineAudioDestinationNode.h"
 
-#include <algorithm>
+#include "core/dom/CrossThreadTask.h"
+#include "modules/webaudio/AudioContext.h"
+#include "platform/Task.h"
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/HRTFDatabaseLoader.h"
-#include "modules/webaudio/AudioContext.h"
-#include "platform/Task.h"
 #include "public/platform/Platform.h"
-#include "wtf/MainThread.h"
+#include <algorithm>
 
 namespace blink {
 
+#if !ENABLE(OILPAN)
+// We need a dedicated specialization for OfflineAudioDestinationNode because it
+// doesn't inherit from RefCounted.
+template<> struct CrossThreadCopierBase<false, false, false, PassRefPtr<OfflineAudioDestinationNode> > : public CrossThreadCopierPassThrough<PassRefPtr<OfflineAudioDestinationNode> > {
+};
+#endif
+
 const size_t renderQuantumSize = 128;
 
 OfflineAudioDestinationNode::OfflineAudioDestinationNode(AudioContext* context, AudioBuffer* renderTarget)
     : AudioDestinationNode(context, renderTarget->sampleRate())
     , m_renderTarget(renderTarget)
     , m_startedRendering(false)
 {
     m_renderBus = AudioBus::create(renderTarget->numberOfChannels(), renderQuantumSize);
 }
 
@@ skipping 29 matching lines @@
 
 void OfflineAudioDestinationNode::startRendering()
 {
     ASSERT(isMainThread());
     ASSERT(m_renderTarget.get());
     if (!m_renderTarget.get())
         return;
 
     if (!m_startedRendering) {
         m_startedRendering = true;
-        m_keepAliveWhileRendering = this;
         m_renderThread = adoptPtr(blink::Platform::current()->createThread("Offline Audio Renderer"));
-        m_renderThread->postTask(new Task(WTF::bind(&OfflineAudioDestinationNode::offlineRender, this)));
+        m_renderThread->postTask(new Task(bind(&OfflineAudioDestinationNode::offlineRender, PassRefPtrWillBeRawPtr<OfflineAudioDestinationNode>(this))));
     }
 }
 
 void OfflineAudioDestinationNode::offlineRender()
 {
     ASSERT(!isMainThread());
     ASSERT(m_renderBus.get());
     if (!m_renderBus.get())
         return;
 
@@ skipping 28 matching lines @@
             const float* source = m_renderBus->channel(channelIndex)->data();
             float* destination = m_renderTarget->getChannelData(channelIndex)->data();
             memcpy(destination + n, source, sizeof(float) * framesAvailableToCopy);
         }
 
         n += framesAvailableToCopy;
         framesToProcess -= framesAvailableToCopy;
     }
 
     // Our work is done. Let the AudioContext know.
-    callOnMainThread(notifyCompleteDispatch, this);
-}
-
-void OfflineAudioDestinationNode::notifyCompleteDispatch(void* userData)
-{
-    OfflineAudioDestinationNode* destinationNode = static_cast<OfflineAudioDestinationNode*>(userData);
-    ASSERT(destinationNode);
-    if (!destinationNode)
-        return;
-
-    destinationNode->notifyComplete();
-    destinationNode->m_keepAliveWhileRendering.clear();
+    if (context()->executionContext())
+        context()->executionContext()->postTask(createCrossThreadTask(&OfflineAudioDestinationNode::notifyComplete, PassRefPtrWillBeRawPtr<OfflineAudioDestinationNode>(this)));
 }
 
 void OfflineAudioDestinationNode::notifyComplete()
 {
     context()->fireCompletionEvent();
 }
 
 void OfflineAudioDestinationNode::trace(Visitor* visitor)
 {
     visitor->trace(m_renderTarget);
     AudioDestinationNode::trace(visitor);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)