g4_table_gen.c

Sat, 22 Feb 2003 10:02:06 +0000

author
eric
date
Sat, 22 Feb 2003 10:02:06 +0000
changeset 71
3e2d23e25fc3
child 78
74b6b230f85d
permissions
-rw-r--r--

Generate G4 tables from strings of ones and zeros.

eric@71 1 /*
eric@71 2 * t2p: Create a PDF file from the contents of one or more TIFF
eric@71 3 * bilevel image files. The images in the resulting PDF file
eric@71 4 * will be compressed using ITU-T T.6 (G4) fax encoding.
eric@71 5 *
eric@71 6 * G4 table generator
eric@71 7 * $Id: g4_table_gen.c,v 1.1 2003/02/22 02:02:06 eric Exp $
eric@71 8 * Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
eric@71 9 *
eric@71 10 * This program is free software; you can redistribute it and/or modify
eric@71 11 * it under the terms of the GNU General Public License version 2 as
eric@71 12 * published by the Free Software Foundation. Note that permission is
eric@71 13 * not granted to redistribute this program under the terms of any
eric@71 14 * other version of the General Public License.
eric@71 15 *
eric@71 16 * This program is distributed in the hope that it will be useful,
eric@71 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
eric@71 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
eric@71 19 * GNU General Public License for more details.
eric@71 20 *
eric@71 21 * You should have received a copy of the GNU General Public License
eric@71 22 * along with this program; if not, write to the Free Software
eric@71 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
eric@71 24 */
eric@71 25
eric@71 26
eric@71 27 #include <stdbool.h>
eric@71 28 #include <stdint.h>
eric@71 29 #include <stdio.h>
eric@71 30 #include <stdlib.h>
eric@71 31 #include <string.h>
eric@71 32
eric@71 33
eric@71 34 void emit_code (int indent, char *code, int last, bool comment, int cval)
eric@71 35 {
eric@71 36 int i;
eric@71 37 int count = 0;
eric@71 38 uint32_t val = 0;
eric@71 39
eric@71 40 printf ("%*s{ ", indent, "");
eric@71 41
eric@71 42 printf ("%d, ", strlen (code));
eric@71 43
eric@71 44 for (i = 0; i < strlen (code); i++)
eric@71 45 switch (code [i])
eric@71 46 {
eric@71 47 case '0': val = (val << 1); count++; break;
eric@71 48 case '1': val = (val << 1) + 1; count++; break;
eric@71 49 case ' ': break;
eric@71 50 default:
eric@71 51 fprintf (stderr, "internal error\n");
eric@71 52 exit (2);
eric@71 53 }
eric@71 54
eric@71 55 printf ("0x%0*x", (count + 3)/4, val);
eric@71 56
eric@71 57 printf (" }");
eric@71 58 if (! last)
eric@71 59 printf (",");
eric@71 60 if (comment)
eric@71 61 printf (" /* %d */", cval);
eric@71 62 printf ("\n");
eric@71 63 }
eric@71 64
eric@71 65
eric@71 66 char *long_makeup_code [12] =
eric@71 67 {
eric@71 68 /* 1792 */ "00000001000",
eric@71 69 /* 1856 */ "00000001100",
eric@71 70 /* 1920 */ "00000001101",
eric@71 71 /* 1984 */ "000000010010",
eric@71 72 /* 2048 */ "000000010011",
eric@71 73 /* 2112 */ "000000010100",
eric@71 74 /* 2176 */ "000000010101",
eric@71 75 /* 2240 */ "000000010110",
eric@71 76 /* 2304 */ "000000010111",
eric@71 77 /* 2368 */ "000000011100",
eric@71 78 /* 2432 */ "000000011101",
eric@71 79 /* 2496 */ "000000011110"
eric@71 80 /* 2560 "000000011111" hard-coded, doesn't need to be in table */
eric@71 81 };
eric@71 82
eric@71 83
eric@71 84 void print_long_makeup_code (void)
eric@71 85 {
eric@71 86 int i;
eric@71 87
eric@71 88 printf ("static g4_bits g4_long_makeup_code [12] =\n");
eric@71 89 printf (" {\n");
eric@71 90 for (i = 0; i < 12; i++)
eric@71 91 emit_code (4, long_makeup_code [i], i == 11, 1, i * 64 + 1792);
eric@71 92 printf (" };\n");
eric@71 93 }
eric@71 94
eric@71 95
eric@71 96 char *makeup_code [64][2] =
eric@71 97 {
eric@71 98 { /* 64 */ "11011", "0000001111" },
eric@71 99 { /* 128 */ "10010", "000011001000" },
eric@71 100 { /* 192 */ "010111", "000011001001" },
eric@71 101 { /* 256 */ "0110111", "000001011011" },
eric@71 102 { /* 320 */ "00110110", "000000110011" },
eric@71 103 { /* 384 */ "00110111", "000000110100" },
eric@71 104 { /* 448 */ "01100100", "000000110101" },
eric@71 105 { /* 512 */ "01100101", "0000001101100" },
eric@71 106 { /* 576 */ "01101000", "0000001101101" },
eric@71 107 { /* 640 */ "01100111", "0000001001010" },
eric@71 108 { /* 704 */ "011001100", "0000001001011" },
eric@71 109 { /* 768 */ "011001101", "0000001001100" },
eric@71 110 { /* 832 */ "011010010", "0000001001101" },
eric@71 111 { /* 896 */ "011010011", "0000001110010" },
eric@71 112 { /* 960 */ "011010100", "0000001110011" },
eric@71 113 { /* 1024 */ "011010101", "0000001110100" },
eric@71 114 { /* 1088 */ "011010110", "0000001110101" },
eric@71 115 { /* 1152 */ "011010111", "0000001110110" },
eric@71 116 { /* 1216 */ "011011000", "0000001110111" },
eric@71 117 { /* 1280 */ "011011001", "0000001010010" },
eric@71 118 { /* 1344 */ "011011010", "0000001010011" },
eric@71 119 { /* 1408 */ "011011011", "0000001010100" },
eric@71 120 { /* 1472 */ "010011000", "0000001010101" },
eric@71 121 { /* 1536 */ "010011001", "0000001011010" },
eric@71 122 { /* 1600 */ "010011010", "0000001011011" },
eric@71 123 { /* 1664 */ "011000", "0000001100100" },
eric@71 124 { /* 1728 */ "010011011", "0000001100101" }
eric@71 125 };
eric@71 126
eric@71 127
eric@71 128 void print_makeup_code (void)
eric@71 129 {
eric@71 130 int i;
eric@71 131
eric@71 132 printf ("static g4_bits g4_makeup_code [2] [27] =\n");
eric@71 133 printf (" {\n");
eric@71 134 printf (" {\n");
eric@71 135 printf (" /* white */\n");
eric@71 136 for (i = 0; i <= 26; i++)
eric@71 137 emit_code (6, makeup_code [i][0], i == 26, 1, (i + 1) * 64);
eric@71 138 printf (" },\n");
eric@71 139 printf (" {\n");
eric@71 140 printf (" /* black */\n");
eric@71 141 for (i = 0; i <= 26; i++)
eric@71 142 emit_code (6, makeup_code [i][1], i == 26, 1, (i + 1) * 64);
eric@71 143 printf (" }\n");
eric@71 144 printf (" };\n");
eric@71 145 }
eric@71 146
eric@71 147
eric@71 148 char *h_code [64][2] =
eric@71 149 {
eric@71 150 { /* 0 */ "00110101", "0000110111" },
eric@71 151 { /* 1 */ "000111", "010" },
eric@71 152 { /* 2 */ "0111", "11" },
eric@71 153 { /* 3 */ "1000", "10" },
eric@71 154 { /* 4 */ "1011", "011" },
eric@71 155 { /* 5 */ "1100", "0011" },
eric@71 156 { /* 6 */ "1110", "0010" },
eric@71 157 { /* 7 */ "1111", "00011" },
eric@71 158 { /* 8 */ "10011", "000101" },
eric@71 159 { /* 9 */ "10100", "000100" },
eric@71 160 { /* 10 */ "00111", "0000100" },
eric@71 161 { /* 11 */ "01000", "0000101" },
eric@71 162 { /* 12 */ "001000", "0000111" },
eric@71 163 { /* 13 */ "000011", "00000100" },
eric@71 164 { /* 14 */ "110100", "00000111" },
eric@71 165 { /* 15 */ "110101", "000011000" },
eric@71 166 { /* 16 */ "101010", "0000010111" },
eric@71 167 { /* 17 */ "101011", "0000011000" },
eric@71 168 { /* 18 */ "0100111", "0000001000" },
eric@71 169 { /* 19 */ "0001100", "00001100111" },
eric@71 170 { /* 20 */ "0001000", "00001101000" },
eric@71 171 { /* 21 */ "0010111", "00001101100" },
eric@71 172 { /* 22 */ "0000011", "00000110111" },
eric@71 173 { /* 23 */ "0000100", "00000101000" },
eric@71 174 { /* 24 */ "0101000", "00000010111" },
eric@71 175 { /* 25 */ "0101011", "00000011000" },
eric@71 176 { /* 26 */ "0010011", "000011001010" },
eric@71 177 { /* 27 */ "0100100", "000011001011" },
eric@71 178 { /* 28 */ "0011000", "000011001100" },
eric@71 179 { /* 29 */ "00000010", "000011001101" },
eric@71 180 { /* 30 */ "00000011", "000001101000" },
eric@71 181 { /* 31 */ "00011010", "000001101001" },
eric@71 182 { /* 32 */ "00011011", "000001101010" },
eric@71 183 { /* 33 */ "00010010", "000001101011" },
eric@71 184 { /* 34 */ "00010011", "000011010010" },
eric@71 185 { /* 35 */ "00010100", "000011010011" },
eric@71 186 { /* 36 */ "00010101", "000011010100" },
eric@71 187 { /* 37 */ "00010110", "000011010101" },
eric@71 188 { /* 38 */ "00010111", "000011010110" },
eric@71 189 { /* 39 */ "00101000", "000011010111" },
eric@71 190 { /* 40 */ "00101001", "000001101100" },
eric@71 191 { /* 41 */ "00101010", "000001101101" },
eric@71 192 { /* 42 */ "00101011", "000011011010" },
eric@71 193 { /* 43 */ "00101100", "000011011011" },
eric@71 194 { /* 44 */ "00101101", "000001010100" },
eric@71 195 { /* 45 */ "00000100", "000001010101" },
eric@71 196 { /* 46 */ "00000101", "000001010110" },
eric@71 197 { /* 47 */ "00001010", "000001010111" },
eric@71 198 { /* 48 */ "00001011", "000001100100" },
eric@71 199 { /* 49 */ "01010010", "000001100101" },
eric@71 200 { /* 50 */ "01010011", "000001010010" },
eric@71 201 { /* 51 */ "01010100", "000001010011" },
eric@71 202 { /* 52 */ "01010101", "000000100100" },
eric@71 203 { /* 53 */ "00100100", "000000110111" },
eric@71 204 { /* 54 */ "00100101", "000000111000" },
eric@71 205 { /* 55 */ "01011000", "000000100111" },
eric@71 206 { /* 56 */ "01011001", "000000101000" },
eric@71 207 { /* 57 */ "01011010", "000001011000" },
eric@71 208 { /* 58 */ "01011011", "000001011001" },
eric@71 209 { /* 59 */ "01001010", "000000101011" },
eric@71 210 { /* 60 */ "01001011", "000000101100" },
eric@71 211 { /* 61 */ "00110010", "000001011010" },
eric@71 212 { /* 62 */ "00110011", "000001100110" },
eric@71 213 { /* 63 */ "00110100", "000001100111" }
eric@71 214 };
eric@71 215
eric@71 216
eric@71 217 void print_h_code (void)
eric@71 218 {
eric@71 219 int i;
eric@71 220
eric@71 221 printf ("static g4_bits g4_h_code [2] [64] =\n");
eric@71 222 printf (" {\n");
eric@71 223 printf (" {\n");
eric@71 224 printf (" /* white */\n");
eric@71 225 for (i = 0; i <= 63; i++)
eric@71 226 emit_code (6, h_code [i][0], i == 63, 1, i);
eric@71 227 printf (" },\n");
eric@71 228 printf (" {\n");
eric@71 229 printf (" /* black */\n");
eric@71 230 for (i = 0; i <= 63; i++)
eric@71 231 emit_code (6, h_code [i][1], i == 63, 1, i);
eric@71 232 printf (" }\n");
eric@71 233 printf (" };\n");
eric@71 234 }
eric@71 235
eric@71 236
eric@71 237 char *v_code [7] =
eric@71 238 {
eric@71 239 /* -3 */ "0000010",
eric@71 240 /* -2 */ "000010",
eric@71 241 /* -1 */ "010",
eric@71 242 /* 0 */ "1",
eric@71 243 /* 1 */ "011",
eric@71 244 /* 2 */ "000011",
eric@71 245 /* 3 */ "0000011"
eric@71 246 };
eric@71 247
eric@71 248
eric@71 249 void print_v_code (void)
eric@71 250 {
eric@71 251 int i;
eric@71 252
eric@71 253 printf ("static g4_bits g4_vert_code [7] =\n");
eric@71 254 printf (" {\n");
eric@71 255 for (i = 0; i <= 6; i++)
eric@71 256 emit_code (4, v_code [i], i == 6, 1, i - 3);
eric@71 257 printf (" };\n");
eric@71 258 }
eric@71 259
eric@71 260
eric@71 261 int main (int argc, char *argv [])
eric@71 262 {
eric@71 263 printf ("/* This file is automatically generated; do not edit */\n");
eric@71 264 printf ("\n");
eric@71 265 printf ("typedef struct\n");
eric@71 266 printf ("{\n");
eric@71 267 printf (" uint32_t count;\n");
eric@71 268 printf (" uint32_t bits;\n");
eric@71 269 printf ("} g4_bits;\n");
eric@71 270 printf ("\n");
eric@71 271
eric@71 272 print_long_makeup_code ();
eric@71 273 printf ("\n");
eric@71 274
eric@71 275 print_makeup_code ();
eric@71 276 printf ("\n");
eric@71 277
eric@71 278 print_h_code ();
eric@71 279 printf ("\n");
eric@71 280
eric@71 281 print_v_code ();
eric@71 282
eric@71 283 exit (0);
eric@71 284 }