#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
