/*
Copyright (C) 2008 Rocky Bernstein
Copyright (C) 1998 Monty xiphmont@mit.edu
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see .
*/
/******************************************************************
* FFT implementation from OggSquish, minus cosine transforms.
* Only convenience functions exposed
******************************************************************/
extern void fft_forward(int n, float *buf, float *trigcache, int *sp);
extern void fft_backward(int n, float *buf, float *trigcache, int *sp);
extern void fft_i(int n, float **trigcache, int **splitcache);