ScriptProcessorHandler::ScriptProcessorHandler(AudioNode& node,
float sampleRate,
size_t bufferSize,
unsigned numberOfInputChannels,
unsigned numberOfOutputChannels)
: AudioHandler(NodeTypeJavaScript, node, sampleRate),
m_doubleBufferIndex(0),
m_bufferSize(bufferSize),
m_bufferReadWriteIndex(0),
m_numberOfInputChannels(numberOfInputChannels),
m_numberOfOutputChannels(numberOfOutputChannels),
m_internalInputBus(AudioBus::create(numberOfInputChannels,
AudioUtilities::kRenderQuantumFrames,
false)) {
// Regardless of the allowed buffer sizes, we still need to process at the
// granularity of the AudioNode.
if (m_bufferSize < AudioUtilities::kRenderQuantumFrames)
m_bufferSize = AudioUtilities::kRenderQuantumFrames;
DCHECK_LE(numberOfInputChannels, BaseAudioContext::maxNumberOfChannels());
addInput();
addOutput(numberOfOutputChannels);
m_channelCount = numberOfInputChannels;
setInternalChannelCountMode(Explicit);
initialize();
}
DefaultAudioDestinationHandler::DefaultAudioDestinationHandler(AudioNode& node)
: AudioDestinationHandler(node, AudioDestination::hardwareSampleRate()),
m_numberOfInputChannels(0) {
// Node-specific default mixing rules.
m_channelCount = 2;
setInternalChannelCountMode(Explicit);
setInternalChannelInterpretation(AudioBus::Speakers);
}
ConvolverHandler::ConvolverHandler(AudioNode& node, float sampleRate)
: AudioHandler(NodeTypeConvolver, node, sampleRate), m_normalize(true) {
addInput();
addOutput(2);
// Node-specific default mixing rules.
m_channelCount = 2;
setInternalChannelCountMode(ClampedMax);
setInternalChannelInterpretation(AudioBus::Speakers);
initialize();
}
ChannelMergerHandler::ChannelMergerHandler(AudioNode& node,
float sampleRate,
unsigned numberOfInputs)
: AudioHandler(NodeTypeChannelMerger, node, sampleRate) {
// These properties are fixed for the node and cannot be changed by user.
m_channelCount = 1;
setInternalChannelCountMode(Explicit);
// Create the requested number of inputs.
for (unsigned i = 0; i < numberOfInputs; ++i)
addInput();
// Create the output with the requested number of channels.
addOutput(numberOfInputs);
initialize();
}
StereoPannerHandler::StereoPannerHandler(AudioNode& node,
float sampleRate,
AudioParamHandler& pan)
: AudioHandler(NodeTypeStereoPanner, node, sampleRate),
m_pan(pan),
m_sampleAccuratePanValues(AudioUtilities::kRenderQuantumFrames) {
addInput();
addOutput(2);
// The node-specific default mixing rules declare that StereoPannerNode
// can handle mono to stereo and stereo to stereo conversion.
m_channelCount = 2;
setInternalChannelCountMode(ClampedMax);
setInternalChannelInterpretation(AudioBus::Speakers);
initialize();
}
