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annotate peck_fftr.h @ 0:723f588b82ac

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

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