ref: 6d4ea7ae0f7253bed01a62c15a9ceffa076166ba
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 32 #define SINC32_WIDTH_BITS 5 // log2(SINC2_TAPS) #define SINC32_FSHIFT (MIXER_FRAC_BITS-(SINC_PHASES_BITS+SINC32_WIDTH_BITS)) #define SINC32_FMASK ((SINC2_TAPS*SINC_PHASES)-SINC2_TAPS) extern float *fKaiserSinc_8, *fDownSample1_8, *fDownSample2_8; extern float *fKaiserSinc_32, *fDownSample1_32, *fDownSample2_32; extern float *fKaiserSinc, *fDownSample1, *fDownSample2; bool calcWindowedSincTables(void); void freeWindowedSincTables(void);