Benny Prijono | da6e89a | 2006-06-18 01:58:38 +0000 | [diff] [blame] | 1 | #ifndef KISS_FTR_H |
| 2 | #define KISS_FTR_H |
| 3 | |
| 4 | #include "kiss_fft.h" |
| 5 | #ifdef __cplusplus |
| 6 | extern "C" { |
| 7 | #endif |
| 8 | |
| 9 | |
| 10 | /* |
| 11 | |
| 12 | Real optimized version can save about 45% cpu time vs. complex fft of a real seq. |
| 13 | |
| 14 | |
| 15 | |
| 16 | */ |
| 17 | |
| 18 | typedef struct kiss_fftr_state *kiss_fftr_cfg; |
| 19 | |
| 20 | |
| 21 | kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); |
| 22 | /* |
| 23 | nfft must be even |
| 24 | |
| 25 | If you don't care to allocate space, use mem = lenmem = NULL |
| 26 | */ |
| 27 | |
| 28 | |
| 29 | void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata); |
| 30 | /* |
| 31 | input timedata has nfft scalar points |
| 32 | output freqdata has nfft/2+1 complex points |
| 33 | */ |
| 34 | |
| 35 | void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata); |
| 36 | /* |
| 37 | input freqdata has nfft/2+1 complex points |
| 38 | output timedata has nfft scalar points |
| 39 | */ |
| 40 | |
Benny Prijono | dc498ca | 2006-07-26 17:04:54 +0000 | [diff] [blame^] | 41 | #define kiss_fftr_free speex_free |
Benny Prijono | da6e89a | 2006-06-18 01:58:38 +0000 | [diff] [blame] | 42 | |
| 43 | #ifdef __cplusplus |
| 44 | } |
| 45 | #endif |
| 46 | #endif |