Chris@1: /********************************************************************
Chris@1:  *                                                                  *
Chris@1:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
Chris@1:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
Chris@1:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
Chris@1:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
Chris@1:  *                                                                  *
Chris@1:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
Chris@1:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
Chris@1:  *                                                                  *
Chris@1:  ********************************************************************
Chris@1: 
Chris@1:  function: fft transform
Chris@1:  last mod: $Id: smallft.h 13293 2007-07-24 00:09:47Z xiphmont $
Chris@1: 
Chris@1:  ********************************************************************/
Chris@1: 
Chris@1: #ifndef _V_SMFT_H_
Chris@1: #define _V_SMFT_H_
Chris@1: 
Chris@1: #include "vorbis/codec.h"
Chris@1: 
Chris@1: typedef struct {
Chris@1:   int n;
Chris@1:   float *trigcache;
Chris@1:   int *splitcache;
Chris@1: } drft_lookup;
Chris@1: 
Chris@1: extern void drft_forward(drft_lookup *l,float *data);
Chris@1: extern void drft_backward(drft_lookup *l,float *data);
Chris@1: extern void drft_init(drft_lookup *l,int n);
Chris@1: extern void drft_clear(drft_lookup *l);
Chris@1: 
Chris@1: #endif