Mercurial > hg > peckfft
comparison peck_fftr.h @ 0:723f588b82ac
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| author | Peter Meerwald <p.meerwald@bct-electronic.com> |
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| date | Fri, 16 Sep 2011 12:53:08 +0200 |
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| -1:000000000000 | 0:723f588b82ac |
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| 1 #ifndef PECK_FFTR_H | |
| 2 #define PECK_FFTR_H | |
| 3 | |
| 4 #include "peck_fft.h" | |
| 5 | |
| 6 #ifdef __cplusplus | |
| 7 extern "C" { | |
| 8 #endif | |
| 9 | |
| 10 /* | |
| 11 * Real optimized version can save about 45% cpu time vs. complex fft of a real seq. | |
| 12 */ | |
| 13 typedef struct peck_fftr_state *peck_fftr_cfg; | |
| 14 | |
| 15 /* | |
| 16 * peck_fftr_alloc() | |
| 17 * nfft must be even | |
| 18 * | |
| 19 * If you don't care to allocate space, use mem = lenmem = NULL. | |
| 20 */ | |
| 21 peck_fftr_cfg peck_fftr_alloc(int nfft, int inverse_fft, void * mem, size_t * lenmem); | |
| 22 | |
| 23 /* | |
| 24 * peck_fftr() | |
| 25 * input timedata has nfft scalar points | |
| 26 * output freqdata has nfft/2+1 complex points | |
| 27 */ | |
| 28 void peck_fftr(peck_fftr_cfg cfg,const peck_fft_scalar *timedata, peck_fft_cpx *freqdata); | |
| 29 | |
| 30 /* | |
| 31 * peck_fftri() | |
| 32 * input freqdata has nfft/2+1 complex points | |
| 33 * output timedata has nfft scalar points | |
| 34 */ | |
| 35 void peck_fftri(peck_fftr_cfg cfg,const peck_fft_cpx *freqdata, peck_fft_scalar *timedata); | |
| 36 | |
| 37 #define peck_fftr_free free | |
| 38 | |
| 39 #ifdef __cplusplus | |
| 40 } | |
| 41 #endif | |
| 42 | |
| 43 #endif /* PECK_FFTR_H */ |