mirror/kissfft
1
0
Fork 0
mirror of https://github.com/mborgerding/kissfft.git synced 2025-07-18 21:14:24 -04:00
Code Issues Packages Projects Releases Wiki Activity

getting ready for v100

Browse Source
This commit is contained in:
Mark Borgerding
2003-12-15 03:23:46 +00:00
parent 573536f48f
commit 6b23ebb5c1
13 changed files with 331 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
kiss_fft.h
View File

@ -6,11 +6,17 @@
#include <math.h>
#include <memory.h>
/*
ATTENTION!
If you would like a real-only FFT, see sample_code/kiss_fftr.c and .h
If you would like a 2-dimensional FFT, see sample_code/kiss_fft2d.c and .h
*/
#ifdef FIXED_POINT
# define kiss_fft_scalar short
#else
# ifndef kiss_fft_scalar
/* default is float */
# define kiss_fft_scalar float
# endif
#endif
@ -57,28 +63,8 @@ void* kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem);
void kiss_fft(const void * cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout);
/* allocate a 2-dimensional FFT
the data should be stored rowwise,
in other words, an array made up of row[0], then row[1], etc
*/
void * kiss_fft2d_alloc(int nrows,int ncols,int inverse_fft,void * mem,size_t * lenmem);
void kiss_fft2d(const void* cfg_from_alloc , const kiss_fft_cpx *fin,kiss_fft_cpx *fout );
/* Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
*/
void * kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem);
void kiss_fftr(const void * cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata);
void kiss_fftri(const void * cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata);
/* 2d Real optimized version
*/
void * kiss_fftr2d_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem);
void kiss_fftr2d(const void * cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata);
void kiss_fftr2di(const void * cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata);
/* when done with the cfg for a given fft size and direction, simply free it*/
/* If kiss_fft_alloc allocated a buffer, it is one contiguous
buffer and can be simply free()d when no longer needed*/
#define kiss_fft_free free
#endif