PEZW_zerotree.hpp
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上传日期:2007-02-02
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文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /****************************************************************************/
- /* 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 (iraj@sarnoff.com) */
- /* Hung-Ju Lee (hjlee@sarnoff.com) */
- /* Paul Hatrack (hatrack@sarnoff.com) */
- /* Shipeng Li (shipeng@sarnoff.com) */
- /* Bing-Bing Chai (bchai@sarnoff.com) */
- /* B.S. Srinivas (bsrinivas@sarnoff.com) */
- /* */
- /* Bi-level is provided by Texas Instruments */
- /* Jie Liang (liang@ti.com) */
- /* */
- /* Shape Coding is provided by OKI Electric Industry Co., Ltd. */
- /* Zhixiong Wu (sgo@hlabs.oki.co.jp) */
- /* Yoshihiro Ueda (yueda@hlabs.oki.co.jp) */
- /* Toshifumi Kanamaru (kanamaru@hlabs.oki.co.jp) */
- /* */
- /* 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 (liang@ti.com) */
- /* */
- /* Copyright 1996, 1997, 1998 Texas Instruments */
- /****************************************************************************/
- /****************************************************************************
- File name: PEZW_zerotree.h
- Author: Jie Liang (liang@ti.com)
- Functions: Header file for definition of symbols and variables
- used in PEZW coder.
- Revisions: v1.0 (10/04/98)
- *****************************************************************************/
- #ifndef PEZW_ZEROTREE_HPP
- #define PEZW_ZEROTREE_HPP
- #include "PEZW_ac.hpp"
- /* declarations for zerotree coding */
- #define ABS(x) (((x)<0)?-(x):(x))
- /* symbols actuallry used for AC coding */
- #define IZER 0 /* isolated zero */
- #define IVAL 1 /* isolated valued coefficient */
- #define ZTRZ 2 /* zero tree root: zero */
- #define ZTRV 3 /* valued zerotree root */
- /* for internal use only, not sent as zerotree symbols */
- #define DZ 4 /* descendant of a ZTRV */
- #define DS 4 /* descendant of a ZTRS */
- #define SKIP 13 /* out of shape */
- #define SKPZTR 14 /* out of shape and zero tree root */
- #define No_of_states_context0 9
- #define No_of_states_context1 1
- #define No_of_contexts No_of_states_context0*No_of_states_context1*Maximum_Decomp_Levels
- #define NumBands 3
- #define NumContext_per_pixel 6
- #define NumContexts NumBands*NumContext_per_pixel
- /* SYMBOLS FOR INTERNAL USE */
- #define MAXSIZE 1000000 /* maximum bitstream size handled */
- /* Models for arithmetic coding */
- /* THE SET OF SYMBOLS THAT MAY BE ENCODED. */
- #define No_of_chars 4 /* Number of character symbols */
- #define No_of_symbols (No_of_chars+1)
- /* maxmum frequence count */
- #define Max_frequency_TI 127
- /* context models */
- extern int freq_dom_ZTRZ[No_of_symbols];
- extern int freq_dom2_IZER[No_of_symbols];
- /* debugging parameters */
- #define DEBUG_BILEVEL 0
- #define DEBUG_DEC_BS 0
- #define DEBUG_BS 0
- #define DEBUG_BS_DETAIL 0
- #ifdef DEBUG_FILE
- /* debugging variable */
- FILE *fp_debug;
- #define DEBUG_BITSTREAM 0
- #define DEBUG_SYMBOL 1
- #define DEBUG_VALUE 1
- #endif
- #endif