Struct std::IirFilter

#include <std/dsp/filter.h> source

struct IirFilter {
    const &double b;
    unsigned long numB;
    const &double a;
    unsigned long numA;
    &double xHistory;
    &double yHistory;
    unsigned long xPos;
    unsigned long yPos;
}

Fields

§const &double bsource

feedforward coeffs, b[0..numB-1]

§unsigned long numBsource

§const &double asource

feedback coeffs, a[1..numA-1] used (a[0] assumed 1 — pass your a[] with a[0]=1 anyway for clarity)

§unsigned long numAsource

§&double xHistorysource

caller-provided, numB elements, zero-initialized

§&double yHistorysource

caller-provided, numA elements, zero-initialized

§unsigned long xPossource

§unsigned long yPossource

Methods

§double process(double x)source · definition

§void reset()source · definition

§void process_block([]const double in, []double out)source · definition

§

static struct IirFilter new(
    []const double b,
    []const double a,
    []double xHistory,
    []double yHistory,
)

source · definition