1 /******************************************************************
2 * CopyPolicy: GNU Public License 2 applies
3 * Copyright (C) 1998-1999 Monty xiphmont@mit.edu, monty@xiph.org
5 * Stripped down FFT implementation from OggSquish.
7 ******************************************************************/
18 extern void drft_forward(drft_lookup *l,double *data);
19 extern void drft_backward(drft_lookup *l,double *data);
20 extern void drft_init(drft_lookup *l,int n);
21 extern void drft_clear(drft_lookup *l);