1/* 2 * jaricom.c 3 * 4 * Developed 1997 by Guido Vollbeding. 5 * This file is part of the Independent JPEG Group's software. 6 * For conditions of distribution and use, see the accompanying README file. 7 * 8 * This file contains probability estimation tables for common use in 9 * arithmetic entropy encoding and decoding routines. 10 * 11 * This data represents Table D.2 in the JPEG spec (ISO/IEC IS 10918-1 12 * and CCITT Recommendation ITU-T T.81) and Table 24 in the JBIG spec 13 * (ISO/IEC IS 11544 and CCITT Recommendation ITU-T T.82). 14 */ 15 16#define JPEG_INTERNALS 17#include "jinclude.h" 18#include "jpeglib.h" 19 20/* The following #define specifies the packing of the four components 21 * into the compact INT32 representation. 22 * Note that this formula must match the actual arithmetic encoder 23 * and decoder implementation. The implementation has to be changed 24 * if this formula is changed. 25 * The current organization is leaned on Markus Kuhn's JBIG 26 * implementation (jbig_tab.c). 27 */ 28 29#define V(a,b,c,d) (((INT32)a << 16) | ((INT32)c << 8) | ((INT32)d << 7) | b) 30 31const INT32 jaritab[113] = { 32/* 33 * Index, Qe_Value, Next_Index_LPS, Next_Index_MPS, Switch_MPS 34 */ 35/* 0 */ V( 0x5a1d, 1, 1, 1 ), 36/* 1 */ V( 0x2586, 14, 2, 0 ), 37/* 2 */ V( 0x1114, 16, 3, 0 ), 38/* 3 */ V( 0x080b, 18, 4, 0 ), 39/* 4 */ V( 0x03d8, 20, 5, 0 ), 40/* 5 */ V( 0x01da, 23, 6, 0 ), 41/* 6 */ V( 0x00e5, 25, 7, 0 ), 42/* 7 */ V( 0x006f, 28, 8, 0 ), 43/* 8 */ V( 0x0036, 30, 9, 0 ), 44/* 9 */ V( 0x001a, 33, 10, 0 ), 45/* 10 */ V( 0x000d, 35, 11, 0 ), 46/* 11 */ V( 0x0006, 9, 12, 0 ), 47/* 12 */ V( 0x0003, 10, 13, 0 ), 48/* 13 */ V( 0x0001, 12, 13, 0 ), 49/* 14 */ V( 0x5a7f, 15, 15, 1 ), 50/* 15 */ V( 0x3f25, 36, 16, 0 ), 51/* 16 */ V( 0x2cf2, 38, 17, 0 ), 52/* 17 */ V( 0x207c, 39, 18, 0 ), 53/* 18 */ V( 0x17b9, 40, 19, 0 ), 54/* 19 */ V( 0x1182, 42, 20, 0 ), 55/* 20 */ V( 0x0cef, 43, 21, 0 ), 56/* 21 */ V( 0x09a1, 45, 22, 0 ), 57/* 22 */ V( 0x072f, 46, 23, 0 ), 58/* 23 */ V( 0x055c, 48, 24, 0 ), 59/* 24 */ V( 0x0406, 49, 25, 0 ), 60/* 25 */ V( 0x0303, 51, 26, 0 ), 61/* 26 */ V( 0x0240, 52, 27, 0 ), 62/* 27 */ V( 0x01b1, 54, 28, 0 ), 63/* 28 */ V( 0x0144, 56, 29, 0 ), 64/* 29 */ V( 0x00f5, 57, 30, 0 ), 65/* 30 */ V( 0x00b7, 59, 31, 0 ), 66/* 31 */ V( 0x008a, 60, 32, 0 ), 67/* 32 */ V( 0x0068, 62, 33, 0 ), 68/* 33 */ V( 0x004e, 63, 34, 0 ), 69/* 34 */ V( 0x003b, 32, 35, 0 ), 70/* 35 */ V( 0x002c, 33, 9, 0 ), 71/* 36 */ V( 0x5ae1, 37, 37, 1 ), 72/* 37 */ V( 0x484c, 64, 38, 0 ), 73/* 38 */ V( 0x3a0d, 65, 39, 0 ), 74/* 39 */ V( 0x2ef1, 67, 40, 0 ), 75/* 40 */ V( 0x261f, 68, 41, 0 ), 76/* 41 */ V( 0x1f33, 69, 42, 0 ), 77/* 42 */ V( 0x19a8, 70, 43, 0 ), 78/* 43 */ V( 0x1518, 72, 44, 0 ), 79/* 44 */ V( 0x1177, 73, 45, 0 ), 80/* 45 */ V( 0x0e74, 74, 46, 0 ), 81/* 46 */ V( 0x0bfb, 75, 47, 0 ), 82/* 47 */ V( 0x09f8, 77, 48, 0 ), 83/* 48 */ V( 0x0861, 78, 49, 0 ), 84/* 49 */ V( 0x0706, 79, 50, 0 ), 85/* 50 */ V( 0x05cd, 48, 51, 0 ), 86/* 51 */ V( 0x04de, 50, 52, 0 ), 87/* 52 */ V( 0x040f, 50, 53, 0 ), 88/* 53 */ V( 0x0363, 51, 54, 0 ), 89/* 54 */ V( 0x02d4, 52, 55, 0 ), 90/* 55 */ V( 0x025c, 53, 56, 0 ), 91/* 56 */ V( 0x01f8, 54, 57, 0 ), 92/* 57 */ V( 0x01a4, 55, 58, 0 ), 93/* 58 */ V( 0x0160, 56, 59, 0 ), 94/* 59 */ V( 0x0125, 57, 60, 0 ), 95/* 60 */ V( 0x00f6, 58, 61, 0 ), 96/* 61 */ V( 0x00cb, 59, 62, 0 ), 97/* 62 */ V( 0x00ab, 61, 63, 0 ), 98/* 63 */ V( 0x008f, 61, 32, 0 ), 99/* 64 */ V( 0x5b12, 65, 65, 1 ), 100/* 65 */ V( 0x4d04, 80, 66, 0 ), 101/* 66 */ V( 0x412c, 81, 67, 0 ), 102/* 67 */ V( 0x37d8, 82, 68, 0 ), 103/* 68 */ V( 0x2fe8, 83, 69, 0 ), 104/* 69 */ V( 0x293c, 84, 70, 0 ), 105/* 70 */ V( 0x2379, 86, 71, 0 ), 106/* 71 */ V( 0x1edf, 87, 72, 0 ), 107/* 72 */ V( 0x1aa9, 87, 73, 0 ), 108/* 73 */ V( 0x174e, 72, 74, 0 ), 109/* 74 */ V( 0x1424, 72, 75, 0 ), 110/* 75 */ V( 0x119c, 74, 76, 0 ), 111/* 76 */ V( 0x0f6b, 74, 77, 0 ), 112/* 77 */ V( 0x0d51, 75, 78, 0 ), 113/* 78 */ V( 0x0bb6, 77, 79, 0 ), 114/* 79 */ V( 0x0a40, 77, 48, 0 ), 115/* 80 */ V( 0x5832, 80, 81, 1 ), 116/* 81 */ V( 0x4d1c, 88, 82, 0 ), 117/* 82 */ V( 0x438e, 89, 83, 0 ), 118/* 83 */ V( 0x3bdd, 90, 84, 0 ), 119/* 84 */ V( 0x34ee, 91, 85, 0 ), 120/* 85 */ V( 0x2eae, 92, 86, 0 ), 121/* 86 */ V( 0x299a, 93, 87, 0 ), 122/* 87 */ V( 0x2516, 86, 71, 0 ), 123/* 88 */ V( 0x5570, 88, 89, 1 ), 124/* 89 */ V( 0x4ca9, 95, 90, 0 ), 125/* 90 */ V( 0x44d9, 96, 91, 0 ), 126/* 91 */ V( 0x3e22, 97, 92, 0 ), 127/* 92 */ V( 0x3824, 99, 93, 0 ), 128/* 93 */ V( 0x32b4, 99, 94, 0 ), 129/* 94 */ V( 0x2e17, 93, 86, 0 ), 130/* 95 */ V( 0x56a8, 95, 96, 1 ), 131/* 96 */ V( 0x4f46, 101, 97, 0 ), 132/* 97 */ V( 0x47e5, 102, 98, 0 ), 133/* 98 */ V( 0x41cf, 103, 99, 0 ), 134/* 99 */ V( 0x3c3d, 104, 100, 0 ), 135/* 100 */ V( 0x375e, 99, 93, 0 ), 136/* 101 */ V( 0x5231, 105, 102, 0 ), 137/* 102 */ V( 0x4c0f, 106, 103, 0 ), 138/* 103 */ V( 0x4639, 107, 104, 0 ), 139/* 104 */ V( 0x415e, 103, 99, 0 ), 140/* 105 */ V( 0x5627, 105, 106, 1 ), 141/* 106 */ V( 0x50e7, 108, 107, 0 ), 142/* 107 */ V( 0x4b85, 109, 103, 0 ), 143/* 108 */ V( 0x5597, 110, 109, 0 ), 144/* 109 */ V( 0x504f, 111, 107, 0 ), 145/* 110 */ V( 0x5a10, 110, 111, 1 ), 146/* 111 */ V( 0x5522, 112, 109, 0 ), 147/* 112 */ V( 0x59eb, 112, 111, 1 ) 148}; 149