ref: 96bc637f5bfea786153b370b0ee4b56adf905534
dir: /src/mixer/ft2_windowed_sinc.h/
#pragma once #include <stdint.h> #include <stdbool.h> #include "ft2_mix.h" // MIXER_FRAC_BITS // 8192 is a good compromise #define SINC_PHASES 8192 #define SINC_PHASES_BITS 13 // log2(SINC_PHASES) // do not change these! #define SINC8_WIDTH_BITS 3 // log2(8) #define SINC8_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC8_WIDTH_BITS)) #define SINC8_FMASK ((8*SINC_PHASES)-8) #define SINC16_WIDTH_BITS 4 // log2(16) #define SINC16_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC16_WIDTH_BITS)) #define SINC16_FMASK ((16*SINC_PHASES)-16) extern float *fKaiserSinc_8, *fDownSample1_8, *fDownSample2_8; extern float *fKaiserSinc_16, *fDownSample1_16, *fDownSample2_16; extern float *fKaiserSinc, *fDownSample1, *fDownSample2; bool calcWindowedSincTables(void); void freeWindowedSincTables(void);