mirror of https://github.com/rusefi/rusefi.git
28 lines
655 B
C++
28 lines
655 B
C++
/*
|
|
* @file biquad.h
|
|
*
|
|
* @date Sep 10, 2016
|
|
* @author Andrey Belomutskiy, (c) 2012-2020
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
class Biquad {
|
|
public:
|
|
Biquad();
|
|
|
|
float filter(float input);
|
|
void reset();
|
|
void cookSteadyState(float steadyStateInput);
|
|
|
|
void configureBandpass(float samplingFrequency, float centerFrequency, float Q);
|
|
|
|
// Default Q = 0.54, which is the maximum quality factor without time domain overshoot
|
|
// note that it is less than the maximally flat (frequency domain) Q=0.707, which gives some overshoot
|
|
void configureLowpass(float samplingFrequency, float cutoffFrequency, float Q = 0.54f);
|
|
|
|
private:
|
|
float a0, a1, a2, b1, b2;
|
|
float z1, z2;
|
|
};
|