media/kiss_fft/kiss_fftr.h@6474c204b198 (annotated)
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.
| michael@0 | 1 | #ifndef KISS_FTR_H |
| michael@0 | 2 | #define KISS_FTR_H |
| michael@0 | 3 | |
| michael@0 | 4 | #include "kiss_fft.h" |
| michael@0 | 5 | #ifdef __cplusplus |
| michael@0 | 6 | extern "C" { |
| michael@0 | 7 | #endif |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | /* |
| michael@0 | 11 | |
| michael@0 | 12 | Real optimized version can save about 45% cpu time vs. complex fft of a real seq. |
| michael@0 | 13 | |
| michael@0 | 14 | |
| michael@0 | 15 | |
| michael@0 | 16 | */ |
| michael@0 | 17 | |
| michael@0 | 18 | typedef struct kiss_fftr_state *kiss_fftr_cfg; |
| michael@0 | 19 | |
| michael@0 | 20 | |
| michael@0 | 21 | kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); |
| michael@0 | 22 | /* |
| michael@0 | 23 | nfft must be even |
| michael@0 | 24 | |
| michael@0 | 25 | If you don't care to allocate space, use mem = lenmem = NULL |
| michael@0 | 26 | */ |
| michael@0 | 27 | |
| michael@0 | 28 | |
| michael@0 | 29 | void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata); |
| michael@0 | 30 | /* |
| michael@0 | 31 | input timedata has nfft scalar points |
| michael@0 | 32 | output freqdata has nfft/2+1 complex points |
| michael@0 | 33 | */ |
| michael@0 | 34 | |
| michael@0 | 35 | void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata); |
| michael@0 | 36 | /* |
| michael@0 | 37 | input freqdata has nfft/2+1 complex points |
| michael@0 | 38 | output timedata has nfft scalar points |
| michael@0 | 39 | */ |
| michael@0 | 40 | |
| michael@0 | 41 | #define kiss_fftr_free free |
| michael@0 | 42 | |
| michael@0 | 43 | #ifdef __cplusplus |
| michael@0 | 44 | } |
| michael@0 | 45 | #endif |
| michael@0 | 46 | #endif |
