pezw_globals.cpp

jpeg and mpeg 编解码技术源代码

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

/****************************************************************************/
/*     Texas Instruments Predictive Embedded Zerotree (PEZW) Image Codec    */
/*	   Developed by Jie Liang ([e-mail])                                */
/*													                        */ 
/*     Copyright 1996, 1997, 1998 Texas Instruments	      		            */
/****************************************************************************/

/****************************************************************************
   File name:         PEZW_globals.c
   Author:            Jie Liang  ([e-mail])
   Functions:         define global variables visible to the PEZW module
   Revisions:         v1.0 (10/04/98)
*****************************************************************************/
#include <wvtpezw_tree_codec.hpp>
#include <PEZW_zerotree.hpp>

WINT *the_wvt_tree;
WINT *wvt_tree_maxval; 
WINT MaxValue; 
int *snr_weight;
int len_tree_struct;
WINT *abs_wvt_tree;
int *vloc_map, *hloc_map;
short *ScanTrees;
short *next_ScanTrees;
int tree_depth;
short *sig_pos;
char *sig_layer;
int num_Sig;
Ac_encoder **Encoder;
Ac_decoder **Decoder;
unsigned char ***buffer_ptr;
unsigned char bptemp;
short *level_pos;
unsigned char *prev_label;
char *sign_bit;
Ac_model *context_model;
Ac_model *model_sign;
Ac_model *model_sub;
unsigned int *maskbit;
unsigned char *bitplane;

int freq_dom_ZTRZ[No_of_symbols] =   {1, 1, 1, 1, 0};     
int freq_dom2_IZER[No_of_symbols] =  {1, 1, 0, 0, 0};