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94 lines
2.3 KiB
94 lines
2.3 KiB
/*
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SoLoud audio engine
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Copyright (c) 2013-2014 Jari Komppa
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#ifndef SOLOUD_BQRFILTER_H
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#define SOLOUD_BQRFILTER_H
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#include "soloud.h"
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namespace SoLoud
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{
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class BiquadResonantFilter;
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struct BQRStateData
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{
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float mY1, mY2, mX1, mX2;
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};
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class BiquadResonantFilterInstance : public FilterInstance
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{
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enum FILTERATTRIBUTE
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{
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WET = 0,
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TYPE,
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FREQUENCY,
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RESONANCE
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};
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BQRStateData mState[8];
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float mA0, mA1, mA2, mB1, mB2;
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int mDirty;
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float mSamplerate;
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BiquadResonantFilter *mParent;
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void calcBQRParams();
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public:
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virtual void filterChannel(float *aBuffer, unsigned int aSamples, float aSamplerate, time aTime, unsigned int aChannel, unsigned int aChannels);
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virtual ~BiquadResonantFilterInstance();
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BiquadResonantFilterInstance(BiquadResonantFilter *aParent);
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};
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class BiquadResonantFilter : public Filter
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{
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public:
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enum FILTERTYPE
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{
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LOWPASS = 0,
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HIGHPASS = 1,
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BANDPASS = 2
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};
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enum FILTERATTRIBUTE
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{
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WET = 0,
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TYPE,
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FREQUENCY,
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RESONANCE
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};
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int mFilterType;
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float mFrequency;
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float mResonance;
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virtual int getParamCount();
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virtual const char* getParamName(unsigned int aParamIndex);
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virtual unsigned int getParamType(unsigned int aParamIndex);
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virtual float getParamMax(unsigned int aParamIndex);
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virtual float getParamMin(unsigned int aParamIndex);
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virtual BiquadResonantFilterInstance *createInstance();
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BiquadResonantFilter();
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result setParams(int aType, float aFrequency, float aResonance);
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virtual ~BiquadResonantFilter();
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};
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}
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#endif |