ref: 1969e6763675792f743c5299de1d78bbe342da22
dir: /src/pt2_rcfilter.h/
#pragma once #include <stdint.h> #include <stdbool.h> // adding this prevents denormalized numbers, which is slow #define DENORMAL_OFFSET 1e-15 typedef struct rcFilter_t { double buffer[2]; double c, c2, g, cg; } rcFilter_t; void calcRCFilterCoeffs(const double sr, const double hz, rcFilter_t *f); void clearRCFilterState(rcFilter_t *f); void RCLowPassFilterStereo(rcFilter_t *f, const double *in, double *out); void RCHighPassFilterStereo(rcFilter_t *f, const double *in, double *out); void RCLowPassFilter(rcFilter_t *f, const double in, double *out); void RCHighPassFilter(rcFilter_t *f, const double in, double *out);