/* * 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. */ #pragma once #include "AudioBasicProcessorNode.h" #include "BiquadProcessor.h" namespace WebCore { class AudioParam; class BiquadFilterNode : public AudioBasicProcessorNode { public: static Ref<BiquadFilterNode> create(AudioContext& context, float sampleRate) { return adoptRef(*new BiquadFilterNode(context, sampleRate)); } BiquadFilterType type() const; void setType(BiquadFilterType); AudioParam* frequency() { return biquadProcessor()->parameter1(); } AudioParam* q() { return biquadProcessor()->parameter2(); } AudioParam* gain() { return biquadProcessor()->parameter3(); } AudioParam* detune() { return biquadProcessor()->parameter4(); } // Get the magnitude and phase response of the filter at the given // set of frequencies (in Hz). The phase response is in radians. void getFrequencyResponse(const RefPtr<Float32Array>& frequencyHz, const RefPtr<Float32Array>& magResponse, const RefPtr<Float32Array>& phaseResponse); private: BiquadFilterNode(AudioContext&, float sampleRate); BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(processor()); } }; } // namespace WebCore