// Copyright (C) 2001 Jean-Marc Valin

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE.  *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
 * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *
 * PLEASE READ THESE TERMS DISTRIBUTING.                            *
 *                                                                  *
 * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000             *
 * by Monty <monty@xiph.org> and The XIPHOPHORUS Company            *
 * http://www.xiph.org/                                             *
 *                                                                  *
 ********************************************************************

 function: modified discrete cosine transform prototypes
 last mod: $Id: mdct.h,v 1.2 2000/07/06 05:55:37 jmvalin Exp $

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

#ifndef _OGG_mdct_H_
#define _OGG_mdct_H_

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

//#include "codec.h"

typedef struct {
  int n;
  int log2n;
  
  double *trig;
  int    *bitrev;

} mdct_lookup;

extern void mdct_init(mdct_lookup *lookup,int n);
extern void mdct_clear(mdct_lookup *l);
extern void mdct_forward(mdct_lookup *init, double *in, double *out);
extern void mdct_backward(mdct_lookup *init, double *in, double *out);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif