ref: 104c218c9b1565a8d4bc403fea1a527c19271935
dir: /libcelt/kiss_fftr.h/
#ifndef KISS_FTR_H #define KISS_FTR_H #include "kiss_fft.h" #ifdef __cplusplus extern "C" { #endif #define kiss_fftr_alloc SUF(kiss_fftr_alloc,KF_SUFFIX) #define kiss_fftr_alloc SUF(kiss_fftr_alloc,KF_SUFFIX) #define kiss_fftr_twiddles SUF(kiss_fftr_twiddles,KF_SUFFIX) #define kiss_fftr SUF(kiss_fftr,KF_SUFFIX) #define kiss_fftri SUF(kiss_fftri,KF_SUFFIX) /* Real optimized version can save about 45% cpu time vs. complex fft of a real seq. */ struct kiss_fftr_state{ kiss_fft_cfg substate; kiss_twiddle_cpx * super_twiddles; #ifdef USE_SIMD long pad; #endif }; typedef struct kiss_fftr_state *kiss_fftr_cfg; kiss_fftr_cfg kiss_fftr_alloc(int nfft,void * mem, size_t * lenmem); /* nfft must be even If you don't care to allocate space, use mem = lenmem = NULL */ /* input timedata has nfft scalar points output freqdata has nfft/2+1 complex points, packed into nfft scalar points */ void kiss_fftr_twiddles(kiss_fftr_cfg st,kiss_fft_scalar *freqdata); void kiss_fftr(kiss_fftr_cfg st,const kiss_fft_scalar *timedata,kiss_fft_scalar *freqdata); void kiss_fftri(kiss_fftr_cfg st,const kiss_fft_scalar *freqdata, kiss_fft_scalar *timedata); /* input freqdata has nfft/2+1 complex points, packed into nfft scalar points output timedata has nfft scalar points */ #define kiss_fftr_free speex_free #ifdef __cplusplus } #endif #endif