29 lines
1.2 KiB
C
29 lines
1.2 KiB
C
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/*
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$Id: smallft.h,v 1.2 2008/04/16 17:00:40 karl Exp $
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Copyright (C) 2008 Rocky Bernstein <rocky@gnu.org>
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Copyright (C) 1998 Monty xiphmont@mit.edu
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/******************************************************************
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* FFT implementation from OggSquish, minus cosine transforms.
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* Only convenience functions exposed
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******************************************************************/
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extern void fft_forward(int n, float *buf, float *trigcache, int *sp);
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extern void fft_backward(int n, float *buf, float *trigcache, int *sp);
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extern void fft_i(int n, float **trigcache, int **splitcache);
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