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huffman.h
Package: Visual C++视频音频开发实用工程案例精选.rar [view]
Upload User: tuheem
Upload Date: 2007-05-01
Package Size: 21889k
Code Size: 1k
Category:
Multimedia Develop
Development Platform:
Visual C++
- /********************************************************************** * MPEG/audio 编码/解码软件 * * VERSION 4.1 * *********************************************************************/ #define HUFFBITS unsigned long int #define HTN 34 #define MXOFF 250 struct huffcodetab { char tablename[3]; /*字符, 包含 table_description */ unsigned int xlen; unsigned int ylen; unsigned int linbits; /* linbits 数目 */ unsigned int linmax; /*存储在linbits中的最大数目 */ int ref; /*a positive value indicates a reference*/ HUFFBITS *table; /*指向array[xlen][ylen]的指针 */ unsigned char *hlen; /*指向 array[xlen][ylen]的指针 */ unsigned char(*val)[2];/*解码树 */ unsigned int treelen; /*解码树长度 */ }; extern struct huffcodetab ht[HTN];/* 全局内存块 */ /* 所有huffcodtable headers的数组 */ /* 0..31 Huffman code table 0..31 */ /* 32,33 count1-tables */ extern int read_decoder_table(FILE *); extern int huffman_decoder(struct huffcodetab *, int *, int*, int*, int*);