OscillatorNode::OscillatorNode(BaseAudioContext& context)
: AudioScheduledSourceNode(context),
// Use musical pitch standard A440 as a default.
m_frequency(AudioParam::create(context,
ParamTypeOscillatorFrequency,
440,
-context.sampleRate() / 2,
context.sampleRate() / 2)),
// Default to no detuning.
m_detune(AudioParam::create(context, ParamTypeOscillatorDetune, 0)) {
setHandler(OscillatorHandler::create(*this, context.sampleRate(),
m_frequency->handler(),
m_detune->handler()));
}
IIRFilterNode::IIRFilterNode(BaseAudioContext& context,
const Vector<double> feedforwardCoef,
const Vector<double> feedbackCoef)
: AudioNode(context) {
setHandler(AudioBasicProcessorHandler::create(
AudioHandler::NodeTypeIIRFilter, *this, context.sampleRate(),
wrapUnique(new IIRProcessor(context.sampleRate(), 1, feedforwardCoef,
feedbackCoef))));
// Histogram of the IIRFilter order. createIIRFilter ensures that the length
// of |feedbackCoef| is in the range [1, IIRFilter::kMaxOrder + 1]. The order
// is one less than the length of this vector.
DEFINE_STATIC_LOCAL(SparseHistogram, filterOrderHistogram,
("WebAudio.IIRFilterNode.Order"));
filterOrderHistogram.sample(feedbackCoef.size() - 1);
}
ChannelMergerNode::ChannelMergerNode(BaseAudioContext& context,
unsigned numberOfInputs)
: AudioNode(context) {
setHandler(ChannelMergerHandler::create(*this, context.sampleRate(),
numberOfInputs));
}
StereoPannerNode::StereoPannerNode(BaseAudioContext& context)
: AudioNode(context),
m_pan(AudioParam::create(context, ParamTypeStereoPannerPan, 0, -1, 1)) {
setHandler(StereoPannerHandler::create(*this, context.sampleRate(),
m_pan->handler()));
}
ConvolverNode::ConvolverNode(BaseAudioContext& context) : AudioNode(context) {
setHandler(ConvolverHandler::create(*this, context.sampleRate()));
}