annotate src/vamp-sdk/ext/vamp_kiss_fftr.h @ 501:90571dcc371a vamp-kiss-naming

Extensively rename things in the KissFFT headers to use a Vamp prefix. The motivation is not to change anything about the Vamp SDK library builds, but to avoid confusion in case any other code (for example that pulls in the Vamp SDK as part of a wider project definition) accidentally includes these headers instead of, or as well as, some other copy of KissFFT.

#ifndef VAMP_KISS_FFTR_H
#define VAMP_KISS_FFTR_H

#include "vamp_kiss_fft.h"

#ifndef VAMP_KISSFFT_USE_CPP_LINKAGE
#ifdef __cplusplus
extern "C" {
#endif
#endif

    
/* 
 
 Real optimized version can save about 45% cpu time vs. complex fft of a real seq.

 
 
 */

typedef struct vamp_kiss_fftr_state *vamp_kiss_fftr_cfg;


vamp_kiss_fftr_cfg vamp_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 vamp_kiss_fftr(vamp_kiss_fftr_cfg cfg,const vamp_kiss_fft_scalar *timedata,vamp_kiss_fft_cpx *freqdata);
/*
 input timedata has nfft scalar points
 output freqdata has nfft/2+1 complex points
*/

void vamp_kiss_fftri(vamp_kiss_fftr_cfg cfg,const vamp_kiss_fft_cpx *freqdata,vamp_kiss_fft_scalar *timedata);
/*
 input freqdata has  nfft/2+1 complex points
 output timedata has nfft scalar points
*/

void vamp_kiss_fftr_free(void *);

#ifndef VAMP_KISSFFT_USE_CPP_LINKAGE
#ifdef __cplusplus
}
#endif
#endif

#ifdef VAMP_KISSFFT_USE_CPP_LINKAGE
#define VAMP_KISSFFT_USED_CPP_LINKAGE 1
#endif

#endif