media/kiss_fft/kiss_fftr.h@6474c204b198
media/kiss_fft/kiss_fftr.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 #ifndef KISS_FTR_H
2 #define KISS_FTR_H
4 #include "kiss_fft.h"
5 #ifdef __cplusplus
6 extern "C" {
7 #endif
10 /*
12 Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
16 */
18 typedef struct kiss_fftr_state *kiss_fftr_cfg;
21 kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem);
22 /*
23 nfft must be even
25 If you don't care to allocate space, use mem = lenmem = NULL
26 */
29 void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata);
30 /*
31 input timedata has nfft scalar points
32 output freqdata has nfft/2+1 complex points
33 */
35 void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata);
36 /*
37 input freqdata has nfft/2+1 complex points
38 output timedata has nfft scalar points
39 */
41 #define kiss_fftr_free free
43 #ifdef __cplusplus
44 }
45 #endif
46 #endif
