mpeg3dec.h

来自「arm9开发板上的例子,可以学习一下有简单的c程序」· C头文件 代码 · 共 63 行

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

/*
 *	mpeg3dec.h -- MPEG layer III decoding functions definitions
 *
 *	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 MPEG3DEC_H
#define MPEG3DEC_H
/****************************************************************************/

#ifdef MPEGAUD_INT
#define ALIAS_TYPE	INT16
#define ALIAS_BITS	15
#define ALIAS_MULT(bu, cx)	(((bu) * (cx))>>(ALIAS_BITS))
#else
#define ALIAS_TYPE	REAL
#define ALIAS_MULT(bu, cx)	((bu) * (cx))
#endif

#ifdef MPEGAUD_INT
#define POW_TYPE	INT32
#define POW_2_BITS	13
#define POW_4_3_BITS	MPEGTAB_POW_BITS	// 18 usually
#else
#define POW_TYPE REAL
#endif


#define MAX_POS1	7
#define MAX_POS2	32

#ifdef MPEGAUD_INT
#define ST_TYPE		INT16
#define ST_BITS		14
#define ST_MULT(a, b)	(((ST_TYPE)(a) * (ST_TYPE)(b))>>ST_BITS)
#endif

extern int	MPEG3_reset(MPA_STREAM *mps);
extern INT32	MPEG3_decode_frame(MPA_STREAM *mps);

/****************************************************************************/
#endif /* MPEG3DEC_H */