mirror of https://github.com/FOME-Tech/fome-fw.git
27 lines
586 B
C++
27 lines
586 B
C++
/*
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* @file biquad.h
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*
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* @date Sep 10, 2016
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* @author Andrey Belomutskiy, (c) 2012-2020
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*/
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#pragma once
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class Biquad {
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public:
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Biquad();
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float filter(float input);
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void reset();
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void cookSteadyState(float steadyStateInput);
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void configureBandpass(float samplingFrequency, float centerFrequency, float Q);
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// Default Q = 1/sqrt(2) = 0.707 gives a maximally flat passband without any overshoot near the cutoff (ie, Butterworth)
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void configureLowpass(float samplingFrequency, float cutoffFrequency, float Q = 0.707f);
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private:
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float a0, a1, a2, b1, b2;
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float z1, z2;
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};
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