shithub: ft²

ref: c151f95b68a8500612a49768cec1648c02562779
dir: /src/mixer/ft2_cubic_spline.h/

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#pragma once

#include <stdint.h>
#include <stdbool.h>
#include "ft2_mix.h" // MIXER_FRAC_BITS

#define CUBIC_SPLINE_WIDTH 4
#define CUBIC_SPLINE_WIDTH_BITS 2 /* log2(CUBIC_SPLINE_WIDTH) */
#define CUBIC_SPLINE_PHASES 8192
#define CUBIC_SPLINE_PHASES_BITS 13 // log2(CUBIC_SPLINE_PHASES)
#define CUBIC_SPLINE_FRACSHIFT (MIXER_FRAC_BITS-(CUBIC_SPLINE_PHASES_BITS+CUBIC_SPLINE_WIDTH_BITS))
#define CUBIC_SPLINE_FRACMASK ((CUBIC_SPLINE_WIDTH*CUBIC_SPLINE_PHASES)-CUBIC_SPLINE_WIDTH)

extern float *fCubicSplineLUT;

bool setupCubicSplineTable(void);
void freeCubicSplineTable(void);