JCHUFF.h
资源名称:Visualhk.rar [点击查看]
上传用户:cjw5120
上传日期:2022-05-11
资源大小:5032k
文件大小:2k
源码类别:
网络截获/分析
开发平台:
Visual C++
- ////////////////////////////////////////////////////////////////////////
- //
- // Note : this file is included as part of the Smaller Animals Software
- // JpegFile package. Though this file has not been modified from it's
- // original IJG 6a form, it is not the responsibility on the Independent
- // JPEG Group to answer questions regarding this code.
- //
- // Any questions you have about this code should be addressed to :
- //
- // CHRISDL@PAGESZ.NET - the distributor of this package.
- //
- // Remember, by including this code in the JpegFile package, Smaller
- // Animals Software assumes all responsibilities for answering questions
- // about it. If we (SA Software) can't answer your questions ourselves, we
- // will direct you to people who can.
- //
- // Thanks, CDL.
- //
- ////////////////////////////////////////////////////////////////////////
- /*
- * jchuff.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains declarations for Huffman entropy encoding routines
- * that are shared between the sequential encoder (jchuff.c) and the
- * progressive encoder (jcphuff.c). No other modules need to see these.
- */
- /* Derived data constructed for each Huffman table */
- typedef struct {
- unsigned int ehufco[256]; /* code for each symbol */
- char ehufsi[256]; /* length of code for each symbol */
- /* If no code has been allocated for a symbol S, ehufsi[S] contains 0 */
- } c_derived_tbl;
- /* Short forms of external names for systems with brain-damaged linkers. */
- #ifdef NEED_SHORT_EXTERNAL_NAMES
- #define jpeg_make_c_derived_tbl jMkCDerived
- #define jpeg_gen_optimal_table jGenOptTbl
- #endif /* NEED_SHORT_EXTERNAL_NAMES */
- /* Expand a Huffman table definition into the derived format */
- EXTERN(void) jpeg_make_c_derived_tbl
- JPP((j_compress_ptr cinfo, JHUFF_TBL * htbl, c_derived_tbl ** pdtbl));
- /* Generate an optimal table definition given the specified counts */
- EXTERN(void) jpeg_gen_optimal_table
- JPP((j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[]));