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Copy pathBiquadFilterNode.cpp
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119 lines (104 loc) · 4.04 KB
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/*
* Copyright (C) 2011, 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
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "BiquadFilterNode.h"
#include "ExceptionCode.h"
namespace WebCore {
BiquadFilterNode::BiquadFilterNode(AudioContext& context, float sampleRate)
: AudioBasicProcessorNode(context, sampleRate)
{
// Initially setup as lowpass filter.
m_processor = std::make_unique<BiquadProcessor>(context, sampleRate, 1, false);
setNodeType(NodeTypeBiquadFilter);
}
String BiquadFilterNode::type() const
{
switch (const_cast<BiquadFilterNode*>(this)->biquadProcessor()->type()) {
case BiquadProcessor::LowPass:
return "lowpass";
case BiquadProcessor::HighPass:
return "highpass";
case BiquadProcessor::BandPass:
return "bandpass";
case BiquadProcessor::LowShelf:
return "lowshelf";
case BiquadProcessor::HighShelf:
return "highshelf";
case BiquadProcessor::Peaking:
return "peaking";
case BiquadProcessor::Notch:
return "notch";
case BiquadProcessor::Allpass:
return "allpass";
default:
ASSERT_NOT_REACHED();
return "lowpass";
}
}
void BiquadFilterNode::setType(const String& type)
{
if (type == "lowpass")
setType(BiquadProcessor::LowPass);
else if (type == "highpass")
setType(BiquadProcessor::HighPass);
else if (type == "bandpass")
setType(BiquadProcessor::BandPass);
else if (type == "lowshelf")
setType(BiquadProcessor::LowShelf);
else if (type == "highshelf")
setType(BiquadProcessor::HighShelf);
else if (type == "peaking")
setType(BiquadProcessor::Peaking);
else if (type == "notch")
setType(BiquadProcessor::Notch);
else if (type == "allpass")
setType(BiquadProcessor::Allpass);
else
ASSERT_NOT_REACHED();
}
bool BiquadFilterNode::setType(unsigned type)
{
if (type > BiquadProcessor::Allpass)
return false;
biquadProcessor()->setType(static_cast<BiquadProcessor::FilterType>(type));
return true;
}
void BiquadFilterNode::getFrequencyResponse(const Float32Array* frequencyHz,
Float32Array* magResponse,
Float32Array* phaseResponse)
{
if (!frequencyHz || !magResponse || !phaseResponse)
return;
int n = std::min(frequencyHz->length(),
std::min(magResponse->length(), phaseResponse->length()));
if (n) {
biquadProcessor()->getFrequencyResponse(n,
frequencyHz->data(),
magResponse->data(),
phaseResponse->data());
}
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)