Initial revision

CVS patchset: 1
CVS date: 2001/04/18 22:33:39

1 files changed, 39 insertions, 0 deletions

diff --git a/src/libac3/srfft.h b/src/libac3/srfft.h
new file mode 100644
index 000000000..ca85deda1
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+++ b/src/libac3/srfft.h
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+/* 
+ *  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 (complex_t *x);
+void fft_128p (complex_t *x);
+
+#endif /* SRFFT_H__ */