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libfft.h
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1990-01-10
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673b
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21 lines
/* libfft.h - include file for fast Fourier transform library
**
** Copyright (C) 1989 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
typedef struct {
float r;
float i;
} complex;
void initfft( /* int bits */ );
void fft( /* complex x[], int inv */ );
void fft_real_inverse( /* complex x[] */ );