arithdefs.h Source File

00001 /***************************************************************************
00002     arithdefs.h  -  Definitions for arithmetic coding.
00003                              -------------------
00004     begin                : June 21 2002
00005     copyright            : (C) 2003 by Vojtìch Toman
00006     email                : vtoman@lit.cz
00007  ***************************************************************************/
00008 
00009 /***************************************************************************
00010  *                                                                         *
00011  *   This program is free software; you can redistribute it and/or modify  *
00012  *   it under the terms of the GNU General Public License as published by  *
00013  *   the Free Software Foundation; either version 2 of the License, or     *
00014  *   (at your option) any later version.                                   *
00015  *                                                                         *
00016  ***************************************************************************/
00017 
00018 /* Based on code by:                                                       */
00019 
00020 /***************************************************************************
00021 Authors:        John Carpenelli   (johnfc@ecr.mu.oz.au)
00022                 Wayne Salamonsen  (wbs@mundil.cs.mu.oz.au)
00023 
00024 Purpose:        Data compression using a word-based model and revised 
00025                 arithmetic coding method.
00026 
00027 Based on:       A. Moffat, R. Neal, I.H. Witten, "Arithmetic Coding Revisited",
00028                 Proc. IEEE Data Compression Conference, Snowbird, Utah, 
00029                 March 1995.
00030 
00031 
00032 Copyright 1995 John Carpinelli and Wayne Salamonsen, All Rights Reserved.
00033 
00034 These programs are supplied free of charge for research purposes only,
00035 and may not sold or incorporated into any commercial product.  There is
00036 ABSOLUTELY NO WARRANTY of any sort, nor any undertaking that they are
00037 fit for ANY PURPOSE WHATSOEVER.  Use them at your own risk.  If you do
00038 happen to find a bug, or have modifications to suggest, please report
00039 the same to Alistair Moffat, alistair@cs.mu.oz.au.  The copyright
00040 notice above and this statement of conditions must remain an integral
00041 part of each and every copy made of these files.
00042 ****************************************************************************/
00043 
00044 
00052 #ifndef ARITHDEFS_H
00053 #define ARITHDEFS_H
00054 
00055 
00056 
00057 #include "defs.h"
00058 
00059 
00060 
00061 // *** USER ADJUSTABLE PARAMETERS ***
00062 
00063 
00064 
00070 typedef unsigned long CodeValue;
00071 
00072 
00078 typedef unsigned long FreqValue;
00079 
00080 
00086 typedef unsigned long DivValue;
00087 
00088 
00089 
00095 #define MAX_BITS_OUTSTANDING    ((unsigned long)1<<31)
00096 
00097 
00098 
00099 // *** END USER ADJUSTABLE PARAMETERS ***
00100 
00101 
00102 #endif //ARITHDEFS_H