Remove Doppler effect from PannerNode

Source/modules/webaudio/PannerNode.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 44 matching lines @@
     , m_orientation(1, 0, 0)
     , m_velocity(0, 0, 0)
     , m_isAzimuthElevationDirty(true)
     , m_isDistanceConeGainDirty(true)
     , m_isDopplerRateDirty(true)
     , m_lastGain(-1.0)
     , m_cachedAzimuth(0)
     , m_cachedElevation(0)
     , m_cachedDistanceConeGain(1.0f)
     , m_cachedDopplerRate(1)
-    , m_connectionCount(0)
 {
     // Load the HRTF database asynchronously so we don't block the Javascript thread while creating the HRTF database.
     // The HRTF panner will return zeroes until the database is loaded.
     listener()->createAndLoadHRTFDatabaseLoader(context->sampleRate());
 
     addInput();
     addOutput(AudioNodeOutput::create(this, 2));
 
     // Node-specific default mixing rules.
     m_channelCount = 2;
     m_channelCountMode = ClampedMax;
     m_channelInterpretation = AudioBus::Speakers;
 
     setNodeType(NodeTypePanner);
 
     initialize();
 }
 
 PannerNode::~PannerNode()
 {
     ASSERT(!isInitialized());
 }
 
 void PannerNode::dispose()
 {
     uninitialize();
     AudioNode::dispose();
 }
 
-void PannerNode::pullInputs(size_t framesToProcess)
-{
-    // We override pullInputs(), so we can detect new AudioSourceNodes which have connected to us when new connections are made.
-    // These AudioSourceNodes need to be made aware of our existence in order to handle doppler shift pitch changes.
-    if (m_connectionCount != context()->connectionCount()) {
-        m_connectionCount = context()->connectionCount();
-
-        // A map for keeping track if we have visited a node or not. This prevents feedback loops
-        // from recursing infinitely. See crbug.com/331446.
-        HashMap<AudioNode*, bool> visitedNodes;
-
-        // Recursively go through all nodes connected to us
-        notifyAudioSourcesConnectedToNode(this, visitedNodes);
-    }
-
-    AudioNode::pullInputs(framesToProcess);
-}
-
 void PannerNode::process(size_t framesToProcess)
 {
     AudioBus* destination = output(0)->bus();
 
     if (!isInitialized() || !input(0)->isConnected() || !m_panner.get()) {
         destination->zero();
         return;
     }
 
     AudioBus* source = input(0)->bus();
@@ skipping 420 matching lines @@
     if (dirty & PannerNode::AzimuthElevationDirty)
         m_isAzimuthElevationDirty = true;
 
     if (dirty & PannerNode::DistanceConeGainDirty)
         m_isDistanceConeGainDirty = true;
 
     if (dirty & PannerNode::DopplerRateDirty)
         m_isDopplerRateDirty = true;
 }
 
-void PannerNode::notifyAudioSourcesConnectedToNode(AudioNode* node, HashMap<AudioNode*, bool>& visitedNodes)
-{
-    ASSERT(node);
-    if (!node)
-        return;
-
-    // First check if this node is an AudioBufferSourceNode. If so, let it know about us so that doppler shift pitch can be taken into account.
-    if (node->nodeType() == NodeTypeAudioBufferSource) {
-        AudioBufferSourceNode* bufferSourceNode = static_cast<AudioBufferSourceNode*>(node);
-        bufferSourceNode->setPannerNode(this);
-    } else {
-        // Go through all inputs to this node.
-        for (unsigned i = 0; i < node->numberOfInputs(); ++i) {
-            AudioNodeInput* input = node->input(i);
-
-            // For each input, go through all of its connections, looking for AudioBufferSourceNodes.
-            for (unsigned j = 0; j < input->numberOfRenderingConnections(); ++j) {
-                AudioNodeOutput* connectedOutput = input->renderingOutput(j);
-                AudioNode* connectedNode = connectedOutput->node();
-                HashMap<AudioNode*, bool>::iterator iterator = visitedNodes.find(connectedNode);
-
-                // If we've seen this node already, we don't need to process it again. Otherwise,
-                // mark it as visited and recurse through the node looking for sources.
-                if (iterator == visitedNodes.end()) {
-                    visitedNodes.set(connectedNode, true);
-                    notifyAudioSourcesConnectedToNode(connectedNode, visitedNodes); // recurse
-                }
-            }
-        }
-    }
-}
-
 void PannerNode::setChannelCount(unsigned long channelCount, ExceptionState& exceptionState)
 {
     ASSERT(isMainThread());
     AudioContext::AutoLocker locker(context());
 
     // A PannerNode only supports 1 or 2 channels
     if (channelCount > 0 && channelCount <= 2) {
         if (m_channelCount != channelCount) {
             m_channelCount = channelCount;
             if (m_channelCountMode != Max)
@@ skipping 43 matching lines @@
 
 void PannerNode::trace(Visitor* visitor)
 {
     visitor->trace(m_panner);
     AudioNode::trace(visitor);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)