/* * 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 = adoptPtr(new BiquadProcessor(sampleRate, 1, false)); biquadProcessor()->parameter1()->setContext(context); biquadProcessor()->parameter2()->setContext(context); biquadProcessor()->parameter3()->setContext(context); setNodeType(NodeTypeBiquadFilter); } void BiquadFilterNode::setType(unsigned short type, ExceptionCode& ec) { if (type > BiquadProcessor::Allpass) { ec = NOT_SUPPORTED_ERR; return; } biquadProcessor()->setType(static_cast<BiquadProcessor::FilterType>(type)); } 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)