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

 *                                                                  *

 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *

 *                                                                  *

 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *

 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *

 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *

 *                                                                  *

 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *

 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *

 *                                                                  *

 ********************************************************************

 function: modified discrete cosine transform prototypes

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

#ifndef _OGG_mdct_H_

#define _OGG_mdct_H_

#include "ivorbiscodec.h"

#include "misc.h"

#define DATA_TYPE ogg_int32_t

#define REG_TYPE  register ogg_int32_t

#ifdef _LOW_ACCURACY_

#define cPI3_8 (0x0062)

#define cPI2_8 (0x00b5)

#define cPI1_8 (0x00ed)

#else

#define cPI3_8 (0x30fbc54d)

#define cPI2_8 (0x5a82799a)

#define cPI1_8 (0x7641af3d)

#endif

extern void mdct_backward(int n, DATA_TYPE *in);

extern void mdct_shift_right(int n, DATA_TYPE *in, DATA_TYPE *right);

extern void mdct_unroll_lap(int n0,int n1,

			    int lW,int W,

			    DATA_TYPE *in,DATA_TYPE *right,

			    LOOKUP_T *w0,LOOKUP_T *w1,

			    ogg_int16_t *out,

			    int step,

			    int start,int end /* samples, this frame */);

#endif