From c50dc5e888627bd1644f46585a44dc118c865127 Mon Sep 17 00:00:00 2001 From: Klaus Schmidinger Date: Thu, 9 Aug 2001 11:41:39 +0200 Subject: Improvements from Matjaz Thaler --- ac3dec/srfft.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 ac3dec/srfft.h (limited to 'ac3dec/srfft.h') diff --git a/ac3dec/srfft.h b/ac3dec/srfft.h new file mode 100644 index 00000000..7916092a --- /dev/null +++ b/ac3dec/srfft.h @@ -0,0 +1,39 @@ +/* + * srfft.h + * + * Copyright (C) Yuqing Deng - 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 . 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__ */ -- cgit v1.2.3