Point Cloud Library (PCL)
1.12.0
pcl
common
fft
kiss_fftr.h
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#pragma once
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#include "kiss_fft.h"
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#ifdef __cplusplus
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extern
"C"
{
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#endif
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/*
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Real optimized version can save about 45% cpu time vs. complex fft of a real seq.
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*/
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typedef
struct
kiss_fftr_state *kiss_fftr_cfg;
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kiss_fftr_cfg
PCL_EXPORTS
kiss_fftr_alloc(
int
nfft,
int
inverse_fft,
void
* mem,
size_t
* lenmem);
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/*
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nfft must be even
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If you don't care to allocate space, use mem = lenmem = NULL
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*/
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void
PCL_EXPORTS
kiss_fftr(kiss_fftr_cfg cfg,
const
kiss_fft_scalar *timedata,
kiss_fft_cpx
*freqdata);
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/*
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input timedata has nfft scalar points
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output freqdata has nfft/2+1 complex points
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*/
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void
PCL_EXPORTS
kiss_fftri(kiss_fftr_cfg cfg,
const
kiss_fft_cpx
*freqdata,kiss_fft_scalar *timedata);
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/*
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input freqdata has nfft/2+1 complex points
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output timedata has nfft scalar points
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*/
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#define kiss_fftr_free free
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#ifdef __cplusplus
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}
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#endif
PCL_EXPORTS
#define PCL_EXPORTS
Definition:
pcl_macros.h:323
kiss_fft_cpx
Definition:
kiss_fft.h:52