/*

  Copyright (C) 2008 Rocky Bernstein <rocky@gnu.org>

  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 <http://www.gnu.org/licenses/>.

*/

/******************************************************************

 * 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);