Chris@31: #ifndef KISS_FTR_H
Chris@31: #define KISS_FTR_H
Chris@31: 
Chris@31: #include "kiss_fft.h"
Chris@31: #ifdef __cplusplus
Chris@31: extern "C" {
Chris@31: #endif
Chris@31: 
Chris@31:     
Chris@31: /* 
Chris@31:  
Chris@31:  Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
Chris@31: 
Chris@31:  
Chris@31:  
Chris@31:  */
Chris@31: 
Chris@31: typedef struct kiss_fftr_state *kiss_fftr_cfg;
Chris@31: 
Chris@31: 
Chris@31: kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem);
Chris@31: /*
Chris@31:  nfft must be even
Chris@31: 
Chris@31:  If you don't care to allocate space, use mem = lenmem = NULL 
Chris@31: */
Chris@31: 
Chris@31: 
Chris@31: void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata);
Chris@31: /*
Chris@31:  input timedata has nfft scalar points
Chris@31:  output freqdata has nfft/2+1 complex points
Chris@31: */
Chris@31: 
Chris@31: void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata);
Chris@31: /*
Chris@31:  input freqdata has  nfft/2+1 complex points
Chris@31:  output timedata has nfft scalar points
Chris@31: */
Chris@31: 
Chris@31: void kiss_fftr_free(kiss_fftr_cfg);
Chris@31: 
Chris@31: #ifdef __cplusplus
Chris@31: }
Chris@31: #endif
Chris@31: #endif