25 lines
727 B
C
25 lines
727 B
C
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#ifndef FFTSG_H
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#define FFTSG_H
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#include "nextpnr_namespaces.h"
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NEXTPNR_NAMESPACE_BEGIN
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//
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// The following FFT library came from
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// http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html
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//
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//
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/// 1D FFT ////////////////////////////////////////////////////////////////
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void ddct(int n, int isgn, float *a, int *ip, float *w);
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void ddst(int n, int isgn, float *a, int *ip, float *w);
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/// 2D FFT ////////////////////////////////////////////////////////////////
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void ddct2d(int n1, int n2, int isgn, float **a, float *t, int *ip, float *w);
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void ddsct2d(int n1, int n2, int isgn, float **a, float *t, int *ip, float *w);
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void ddcst2d(int n1, int n2, int isgn, float **a, float *t, int *ip, float *w);
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NEXTPNR_NAMESPACE_END
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#endif
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