www.pudn.com > JM60.ZIP > biaridecod.h

/* 
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* COPYRIGHT AND WARRANTY INFORMATION 
* 
* Copyright 2001, International Telecommunications Union, Geneva 
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* use of these programs. 
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* 
* The ITU does not represent or warrant that the programs furnished 
* hereunder are free of infringement of any third-party patents. 
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/*! 
 *************************************************************************** 
 * \file 
 *    biariencode.h 
 * 
 * \brief 
 *    Headerfile for binary arithmetic decoder routines 
 * 
 * \author 
 *    Detlev Marpe, 
 *    Gabi Blättermann 
 *    Copyright (C) 2000 HEINRICH HERTZ INSTITUTE All Rights Reserved. 
 * 
 * \date 
 *    21. Oct 2000 
 ************************************************************************** 
 */ 
 
#ifndef _BIARIDECOD_H_ 
#define _BIARIDECOD_H_ 
 
 
/************************************************************************ 
 * D e f i n i t i o n s 
 *********************************************************************** 
 */ 
 
 
// some definitions to increase the readability of the source code  
 
#define Dbuffer         (dep->Dbuffer) 
#define Dbits_to_go     (dep->Dbits_to_go) 
#define Dcodestrm       (dep->Dcodestrm) 
#define Dcodestrm_len   (dep->Dcodestrm_len) 
 
#define B_BITS    10	// Number of bits to represent the whole coding interval 
#define HALF      (1 << (B_BITS-1)) 
#define QUARTER   (1 << (B_BITS-2)) 
 
/* Range table for  LPS */  
const byte rLPS_table_64x4[64][4]= 
{ 
	{ 128, 176, 208, 240}, 
	{ 128, 167, 197, 227}, 
	{ 128, 158, 187, 216}, 
	{ 123, 150, 178, 205}, 
	{ 116, 142, 169, 195}, 
	{ 111, 135, 160, 185}, 
	{ 105, 128, 152, 175}, 
	{ 100, 122, 144, 166}, 
	{  95, 116, 137, 158}, 
	{  90, 110, 130, 150}, 
	{  85, 104, 123, 142}, 
	{  81,  99, 117, 135}, 
	{  77,  94, 111, 128}, 
	{  73,  89, 105, 122}, 
	{  69,  85, 100, 116}, 
	{  66,  80,  95, 110}, 
	{  62,  76,  90, 104}, 
	{  59,  72,  86,  99}, 
	{  56,  69,  81,  94}, 
	{  53,  65,  77,  89}, 
	{  51,  62,  73,  85}, 
	{  48,  59,  69,  80}, 
	{  46,  56,  66,  76}, 
	{  43,  53,  63,  72}, 
	{  41,  50,  59,  69}, 
	{  39,  48,  56,  65}, 
	{  37,  45,  54,  62}, 
	{  35,  43,  51,  59}, 
	{  33,  41,  48,  56}, 
	{  32,  39,  46,  53}, 
	{  30,  37,  43,  50}, 
	{  29,  35,  41,  48}, 
	{  27,  33,  39,  45}, 
	{  26,  31,  37,  43}, 
	{  24,  30,  35,  41}, 
	{  23,  28,  33,  39}, 
	{  22,  27,  32,  37}, 
	{  21,  26,  30,  35}, 
	{  20,  24,  29,  33}, 
	{  19,  23,  27,  31}, 
	{  18,  22,  26,  30}, 
	{  17,  21,  25,  28}, 
	{  16,  20,  23,  27}, 
	{  15,  19,  22,  25}, 
	{  14,  18,  21,  24}, 
	{  14,  17,  20,  23}, 
	{  13,  16,  19,  22}, 
	{  12,  15,  18,  21}, 
	{  12,  14,  17,  20}, 
	{  11,  14,  16,  19}, 
	{  11,  13,  15,  18}, 
	{  10,  12,  15,  17}, 
	{  10,  12,  14,  16}, 
	{   9,  11,  13,  15}, 
	{   9,  11,  12,  14}, 
	{   8,  10,  12,  14}, 
	{   8,   9,  11,  13}, 
	{   7,   9,  11,  12}, 
	{   7,   9,  10,  12}, 
	{   7,   8,  10,  11}, 
	{   6,   8,   9,  11}, 
	{   6,   7,   9,  10}, 
	{   6,   7,   8,   9}, 
	{   2,   2,   2,   2} 
}; 
 
 
 
const unsigned short AC_next_state_MPS_64[64] =     
{ 
		1,2,3,4,5,6,7,8,9,10, 
		11,12,13,14,15,16,17,18,19,20, 
		21,22,23,24,25,26,27,28,29,30, 
		31,32,33,34,35,36,37,38,39,40, 
		41,42,43,44,45,46,47,48,49,50, 
		51,52,53,54,55,56,57,58,59,60, 
		61,62,62,63 
}; 
	 
 
const unsigned short AC_next_state_LPS_64[64] =     
{ 
		 0, 0, 1, 2, 2, 4, 4, 5, 6, 7, 
		 8, 9, 9,11,11,12,13,13,15,15,  
		 16,16,18,18,19,19,21,21,22,22, 
		 23,24,24,25,26,26,27,27,28,29, 
		 29,30,30,30,31,32,32,33,33,33, 
		 34,34,35,35,35,36,36,36,37,37,  
		 37,38,38,63 
}; 
 
#endif  // BIARIDECOD_H_