|
- #ifndef KISS_FTR_H
- #define KISS_FTR_H
-
- #include "kiss_fft.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_state *kiss_fftr_cfg;
-
-
- kiss_fftr_cfg kiss_fftr_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(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata);
- /*
- input timedata has nfft scalar points
- output freqdata has nfft/2+1 complex points
- */
-
- void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata);
- /*
- input freqdata has nfft/2+1 complex points
- output timedata has nfft scalar points
- */
-
- #define kiss_fftr_free free
-
- #ifdef __cplusplus
- }
- #endif
- #endif
|