Implement Automations for PannerNode and AutioListener

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

 /*
  * Copyright (C) 2010, 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 117 matching lines @@
     ASSERT(!m_isResolvingResumePromises);
     ASSERT(!m_resumeResolvers.size());
 }
 
 void AbstractAudioContext::initialize()
 {
     if (isDestinationInitialized())
         return;
 
     FFTFrame::initialize();
-    m_listener = AudioListener::create();
 
     if (m_destinationNode) {
         m_destinationNode->handler().initialize();
+        // The AudioParams in the listener need access to the destination node, so only create the
+        // listener if the destination node exists.
+        m_listener = AudioListener::create(*this);
     }
 }
 
 void AbstractAudioContext::clear()
 {
     m_destinationNode.clear();
     // The audio rendering thread is dead.  Nobody will schedule AudioHandler
     // deletion.  Let's do it ourselves.
     deferredTaskHandler().clearHandlersToBeDeleted();
     m_isCleared = true;
@@ skipping 696 matching lines @@
     // At the beginning of every render quantum, try to update the internal rendering graph state (from main thread changes).
     // It's OK if the tryLock() fails, we'll just take slightly longer to pick up the changes.
     if (tryLock()) {
         deferredTaskHandler().handleDeferredTasks();
 
         resolvePromisesForResume();
 
         // Check to see if source nodes can be stopped because the end time has passed.
         handleStoppableSourceNodes();
 
+        // Update the dirty state of the listener.
+        listener()->updateState();
+
         unlock();
     }
 }
 
 void AbstractAudioContext::handlePostRenderTasks()
 {
     ASSERT(isAudioThread());
 
     // Must use a tryLock() here too.  Don't worry, the lock will very rarely be contended and this method is called frequently.
     // The worst that can happen is that there will be some nodes which will take slightly longer than usual to be deleted or removed
@@ skipping 108 matching lines @@
 
 SecurityOrigin* AbstractAudioContext::getSecurityOrigin() const
 {
     if (getExecutionContext())
         return getExecutionContext()->getSecurityOrigin();
 
     return nullptr;
 }
 
 } // namespace blink