/*
* 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.
*/
#ifndef BiquadFilterNode_h
#define BiquadFilterNode_h
#include "modules/webaudio/AudioBasicProcessorNode.h"
#include "modules/webaudio/BiquadProcessor.h"
namespace WebCore {
class AudioParam;
class BiquadFilterNode FINAL : public AudioBasicProcessorNode {
public:
// These must be defined as in the .idl file and must match those in the BiquadProcessor class.
enum {
LOWPASS = 0,
HIGHPASS = 1,
BANDPASS = 2,
LOWSHELF = 3,
HIGHSHELF = 4,
PEAKING = 5,
NOTCH = 6,
ALLPASS = 7
};
static PassRefPtr<BiquadFilterNode> create(AudioContext* context, float sampleRate)
{
return adoptRef(new BiquadFilterNode(context, sampleRate));
}
String type() const;
bool setType(unsigned); // Returns true on success.
void setType(const String&);
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 Float32Array* frequencyHz,
Float32Array* magResponse,
Float32Array* phaseResponse);
private:
BiquadFilterNode(AudioContext*, float sampleRate);
BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(processor()); }
};
} // namespace WebCore
#endif // BiquadFilterNode_h