mpegtab.h

mp3解码源代码

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

/*
 *	mpegtab.h -- MPEG Audio tables references
 *
 *	Author  :   St閜hane TAVENARD
 *
 *	(C) Copyright 1997-1997 St閜hane TAVENARD
 *	    All Rights Reserved
 *	
 *	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 2 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, write to the Free Software
 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/****************************************************************************/
#ifndef MPEGTAB_H
#define MPEGTAB_H
/****************************************************************************/

typedef struct {
	UINT16	treelen;
	UINT16	xlen;
	UINT16	ylen;
	UINT16	linbits;
	UINT16	linmax;
	const unsigned char (*val)[2];
} MPT_HUFF;

#ifdef MPEGAUD_INT
#define MPEGTAB_MULT_TYPE	INT32
#define MPEGTAB_MULT_BITS	15
#define MPEGTAB_DEW_TYPE	INT16
#define MPEGTAB_DEW_BITS	14
#define MPEGTAB_POW_TYPE	INT32
#define MPEGTAB_POW_BITS	18
extern const MPEGTAB_POW_TYPE	MPT_pow_4_3[8192];
#else
#define MPEGTAB_MULT_TYPE	REAL
#define MPEGTAB_DEW_TYPE	REAL
#endif

extern const MPEGTAB_MULT_TYPE	MPT_multiple[64];
extern const MPEGTAB_DEW_TYPE	MPT_dewindow[512];

extern const UINT16	MPT_freq[2][4];
extern const INT16	MPT_bitrate[2][3][16];
extern const INT16	MPT_sblimit[5];
extern const INT16	MPT_jsbound[3][4];

/*
 *	MPEG-II Alloc tables
 */
extern const UINT8	MPT_alloc_0[][16];
extern const UINT8	MPT_alloc_1[][16];
extern const UINT8	MPT_alloc_2[][16];
extern const UINT8	MPT_alloc_3[][16];
extern const UINT8	MPT_alloc_4[][16];

/****************************************************************************/
#endif /* MPEGTAB_H */