ref: 4fcc002b4ae32417b80298462c9b674acd3e32aa
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 SINC1_TAPS 8 #define SINC8_WIDTH_BITS 3 // log2(SINC1_TAPS) #define SINC8_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC8_WIDTH_BITS)) #define SINC8_FMASK ((SINC1_TAPS*SINC_PHASES)-SINC1_TAPS) #define SINC2_TAPS 16 #define SINC16_WIDTH_BITS 4 // log2(SINC2_TAPS) #define SINC16_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC16_WIDTH_BITS)) #define SINC16_FMASK ((SINC2_TAPS*SINC_PHASES)-SINC2_TAPS) extern float *fKaiserSinc_8, *fDownSample1_8, *fDownSample2_8; extern float *fKaiserSinc_16, *fDownSample1_16, *fDownSample2_16; extern float *fKaiserSinc, *fDownSample1, *fDownSample2; extern uint64_t sincDownsample1Ratio, sincDownsample2Ratio; bool calcWindowedSincTables(void); void freeWindowedSincTables(void);