binarcodec.hpp

《Visual C++小波变换技术与工程实践》靳济芳编著的光盘程序。

/****************************************************************************/
/*   MPEG4 Visual Texture Coding (VTC) Mode Software                        */
/*                                                                          */
/*   This software was jointly developed by the following participants:     */
/*                                                                          */
/*   Single-quant,  multi-quant and flow control                            */
/*   are provided by  Sarnoff Corporation                                   */
/*     Iraj Sodagar   ([e-mail])                                    */
/*     Hung-Ju Lee    ([e-mail])                                   */
/*     Paul Hatrack   ([e-mail])                                 */
/*     Shipeng Li     ([e-mail])                                 */
/*     Bing-Bing Chai ([e-mail])                                   */
/*     B.S. Srinivas  ([e-mail])                               */
/*                                                                          */
/*   Bi-level is provided by Texas Instruments                              */
/*     Jie Liang      ([e-mail])                                        */
/*                                                                          */
/*   Shape Coding is provided by  OKI Electric Industry Co., Ltd.           */
/*     Zhixiong Wu    ([e-mail])                                 */
/*     Yoshihiro Ueda ([e-mail])                               */
/*     Toshifumi Kanamaru ([e-mail])                        */
/*                                                                          */
/*   OKI, Sharp, Sarnoff, TI and Microsoft contributed to bitstream         */
/*   exchange and bug fixing.                                               */
/*                                                                          */
/*                                                                          */
/* In the course of development of the MPEG-4 standard, this software       */
/* module is an implementation of a part of one or more MPEG-4 tools as     */
/* specified by the MPEG-4 standard.                                        */
/*                                                                          */
/* The copyright of this software belongs to ISO/IEC. ISO/IEC gives use     */
/* of the MPEG-4 standard free license to use this  software module or      */
/* modifications thereof for hardware or software products claiming         */
/* conformance to the MPEG-4 standard.                                      */
/*                                                                          */
/* Those intending to use this software module in hardware or software      */
/* products are advised that use may infringe existing  patents. The        */
/* original developers of this software module and their companies, the     */
/* subsequent editors and their companies, and ISO/IEC have no liability    */
/* and ISO/IEC have no liability for use of this software module or         */
/* modification thereof in an implementation.                               */
/*                                                                          */
/* Permission is granted to MPEG members to use, copy, modify,              */
/* and distribute the software modules ( or portions thereof )              */
/* for standardization activity within ISO/IEC JTC1/SC29/WG11.              */
/*                                                                          */
/* Copyright 1995, 1996, 1997, 1998 ISO/IEC                                 */
/****************************************************************************/

#ifndef _BINARCODEC_H_
#define _BINARCODEC_H_


#define		CODE_BITS		32
#define 	HALF			((unsigned) 1 << (CODE_BITS-1))
#define 	QUARTER			((unsigned) 1 << (CODE_BITS-2))
#define		BSBUFSIZE		512

#define		MAXHEADING		3
#define		MAXMIDDLE		10  /* modified by SL@sarnoff */
#define		MAXTRAILING		2

struct arcodec {
    UInt L; /* lower bound */
    UInt R; /* code range */
    UInt V; /* current code value */
    UInt arpipe;
    Int	bits_to_follow; /* follow bit count */
    Int	first_bit;
    Int	nzeros;
    Int	nonzero;
    Int	nzerosf;
    Int	extrabits;
};

struct armodel {
    Int	type;
    Int	ctx_num;
    Int	adapt;
    UInt *table;
    UInt *c0;
    UInt *cnt;
};

typedef	struct arcodec ArCoder;	
typedef	struct arcodec ArDecoder;
typedef	struct armodel ArModel;


#endif /* _BINARCODEC_H_  */