void PannerNode::notifyAudioSourcesConnectedToNode(ContextRenderLock& r, AudioNode* node)
{
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 = reinterpret_cast<AudioBufferSourceNode*>(node);
bufferSourceNode->setPannerNode(this);
}
else
{
// Go through all inputs to this node.
for (unsigned i = 0; i < node->numberOfInputs(); ++i)
{
auto input = node->input(i);
// For each input, go through all of its connections, looking for AudioBufferSourceNodes.
for (unsigned j = 0; j < input->numberOfRenderingConnections(r); ++j)
{
auto connectedOutput = input->renderingOutput(r, j);
AudioNode* connectedNode = connectedOutput->node();
notifyAudioSourcesConnectedToNode(r, connectedNode); // recurse
}
}
}
}
void PannerNode::notifyAudioSourcesConnectedToNode(AudioNode* node, HashSet<AudioNode*>& 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 = reinterpret_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();
if (visitedNodes.contains(connectedNode))
continue;
visitedNodes.add(connectedNode);
notifyAudioSourcesConnectedToNode(connectedNode, visitedNodes);
}
}
}
}
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::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();
// Recursively go through all nodes connected to us.
notifyAudioSourcesConnectedToNode(this);
}
AudioNode::pullInputs(framesToProcess);
}
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);
}