summaryrefslogtreecommitdiff
path: root/ac3dec/srfft.h
blob: 7916092a454d9e80016b46bff571fd13870faef0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
/* 
 *  srfft.h
 *
 *  Copyright (C) Yuqing Deng <Yuqing_Deng@brown.edu> - April 2000
 *
 *  64 and 128 point split radix fft for ac3dec
 *
 *  The algorithm is desribed in the book:
 *  "Computational Frameworks of the Fast Fourier Transform".
 *
 *  The ideas and the the organization of code borrowed from djbfft written by
 *  D. J. Bernstein <djb@cr.py.to>.  djbff can be found at 
 *  http://cr.yp.to/djbfft.html.
 *
 *  srfft.h is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  srfft.h is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef SRFFT_H__
#define SRFFT_H__

#include "cmplx.h"

void fft_64p_c (complex_t *x);
void fft_128p_c (complex_t *x);

#endif /* SRFFT_H__ */