| #ifndef KISS_FTR_S16_H |
| #define KISS_FTR_S16_H |
| |
| #include "kiss_fft_s16.h" |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| /* |
| |
| Real optimized version can save about 45% cpu time vs. complex fft of a real seq. |
| |
| |
| |
| */ |
| |
| typedef struct kiss_fftr_s16_state *kiss_fftr_s16_cfg; |
| |
| |
| kiss_fftr_s16_cfg kiss_fftr_s16_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); |
| /* |
| nfft must be even |
| |
| If you don't care to allocate space, use mem = lenmem = NULL |
| */ |
| |
| |
| void kiss_fftr_s16(kiss_fftr_s16_cfg cfg,const kiss_fft_s16_scalar *timedata,kiss_fft_s16_cpx *freqdata); |
| /* |
| input timedata has nfft scalar points |
| output freqdata has nfft/2+1 complex points |
| */ |
| |
| void kiss_fftri_s16(kiss_fftr_s16_cfg cfg,const kiss_fft_s16_cpx *freqdata,kiss_fft_s16_scalar *timedata); |
| /* |
| input freqdata has nfft/2+1 complex points |
| output timedata has nfft scalar points |
| */ |
| |
| #define kiss_fftr_s16_free free |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif |
