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345 lines
6.7 KiB
345 lines
6.7 KiB
/* Initialise fax decoder tables |
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Copyright (C) 1990, 1995 Frank D. Cringle. |
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This file is part of viewfax - g3/g4 fax processing software. |
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viewfax is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 2 of the License, or (at your |
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option) any later version. |
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
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#include <sys/types.h> |
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#include "faxexpand.h" |
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struct tabent MainTable[128]; |
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struct tabent WhiteTable[4096]; |
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struct tabent BlackTable[8192]; |
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struct proto { |
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t16bits code; /* right justified, lsb-first, zero filled */ |
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t16bits val; /* (pixel count)<<4 + code width */ |
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}; |
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static const struct proto Pass[] = { |
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{ 0x0008, 4 }, |
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{ 0, 0 } |
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}; |
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static const struct proto Horiz[] = { |
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{ 0x0004, 3 }, |
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{ 0, 0 } |
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}; |
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static const struct proto V0[] = { |
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{ 0x0001, 1 }, |
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{ 0, 0 } |
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}; |
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static const struct proto VR[] = { |
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{ 0x0006, (1<<4)+3 }, |
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{ 0x0030, (2<<4)+6 }, |
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{ 0x0060, (3<<4)+7 }, |
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{ 0, 0 } |
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}; |
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static const struct proto VL[] = { |
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{ 0x0002, (1<<4)+3 }, |
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{ 0x0010, (2<<4)+6 }, |
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{ 0x0020, (3<<4)+7 }, |
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{ 0, 0 } |
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}; |
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static const struct proto ExtV[] = { |
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{ 0x0040, 7 }, |
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{ 0, 0 } |
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}; |
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static const struct proto EOLV[] = { |
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{ 0x0000, 7 }, |
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{ 0, 0 } |
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}; |
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static const struct proto MakeUpW[] = { |
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{ 0x001b, 1029 }, |
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{ 0x0009, 2053 }, |
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{ 0x003a, 3078 }, |
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{ 0x0076, 4103 }, |
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{ 0x006c, 5128 }, |
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{ 0x00ec, 6152 }, |
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{ 0x0026, 7176 }, |
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{ 0x00a6, 8200 }, |
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{ 0x0016, 9224 }, |
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{ 0x00e6, 10248 }, |
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{ 0x0066, 11273 }, |
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{ 0x0166, 12297 }, |
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{ 0x0096, 13321 }, |
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{ 0x0196, 14345 }, |
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{ 0x0056, 15369 }, |
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{ 0x0156, 16393 }, |
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{ 0x00d6, 17417 }, |
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{ 0x01d6, 18441 }, |
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{ 0x0036, 19465 }, |
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{ 0x0136, 20489 }, |
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{ 0x00b6, 21513 }, |
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{ 0x01b6, 22537 }, |
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{ 0x0032, 23561 }, |
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{ 0x0132, 24585 }, |
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{ 0x00b2, 25609 }, |
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{ 0x0006, 26630 }, |
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{ 0x01b2, 27657 }, |
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{ 0, 0 } |
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}; |
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static const struct proto MakeUpB[] = { |
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{ 0x03c0, 1034 }, |
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{ 0x0130, 2060 }, |
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{ 0x0930, 3084 }, |
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{ 0x0da0, 4108 }, |
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{ 0x0cc0, 5132 }, |
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{ 0x02c0, 6156 }, |
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{ 0x0ac0, 7180 }, |
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{ 0x06c0, 8205 }, |
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{ 0x16c0, 9229 }, |
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{ 0x0a40, 10253 }, |
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{ 0x1a40, 11277 }, |
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{ 0x0640, 12301 }, |
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{ 0x1640, 13325 }, |
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{ 0x09c0, 14349 }, |
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{ 0x19c0, 15373 }, |
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{ 0x05c0, 16397 }, |
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{ 0x15c0, 17421 }, |
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{ 0x0dc0, 18445 }, |
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{ 0x1dc0, 19469 }, |
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{ 0x0940, 20493 }, |
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{ 0x1940, 21517 }, |
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{ 0x0540, 22541 }, |
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{ 0x1540, 23565 }, |
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{ 0x0b40, 24589 }, |
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{ 0x1b40, 25613 }, |
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{ 0x04c0, 26637 }, |
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{ 0x14c0, 27661 }, |
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{ 0, 0 } |
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}; |
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static const struct proto MakeUp[] = { |
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{ 0x0080, 28683 }, |
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{ 0x0180, 29707 }, |
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{ 0x0580, 30731 }, |
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{ 0x0480, 31756 }, |
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{ 0x0c80, 32780 }, |
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{ 0x0280, 33804 }, |
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{ 0x0a80, 34828 }, |
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{ 0x0680, 35852 }, |
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{ 0x0e80, 36876 }, |
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{ 0x0380, 37900 }, |
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{ 0x0b80, 38924 }, |
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{ 0x0780, 39948 }, |
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{ 0x0f80, 40972 }, |
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{ 0, 0 } |
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}; |
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static const struct proto TermW[] = { |
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{ 0x00ac, 8 }, |
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{ 0x0038, 22 }, |
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{ 0x000e, 36 }, |
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{ 0x0001, 52 }, |
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{ 0x000d, 68 }, |
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{ 0x0003, 84 }, |
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{ 0x0007, 100 }, |
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{ 0x000f, 116 }, |
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{ 0x0019, 133 }, |
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{ 0x0005, 149 }, |
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{ 0x001c, 165 }, |
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{ 0x0002, 181 }, |
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{ 0x0004, 198 }, |
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{ 0x0030, 214 }, |
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{ 0x000b, 230 }, |
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{ 0x002b, 246 }, |
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{ 0x0015, 262 }, |
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{ 0x0035, 278 }, |
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{ 0x0072, 295 }, |
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{ 0x0018, 311 }, |
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{ 0x0008, 327 }, |
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{ 0x0074, 343 }, |
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{ 0x0060, 359 }, |
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{ 0x0010, 375 }, |
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{ 0x000a, 391 }, |
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{ 0x006a, 407 }, |
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{ 0x0064, 423 }, |
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{ 0x0012, 439 }, |
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{ 0x000c, 455 }, |
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{ 0x0040, 472 }, |
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{ 0x00c0, 488 }, |
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{ 0x0058, 504 }, |
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{ 0x00d8, 520 }, |
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{ 0x0048, 536 }, |
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{ 0x00c8, 552 }, |
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{ 0x0028, 568 }, |
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{ 0x00a8, 584 }, |
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{ 0x0068, 600 }, |
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{ 0x00e8, 616 }, |
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{ 0x0014, 632 }, |
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{ 0x0094, 648 }, |
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{ 0x0054, 664 }, |
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{ 0x00d4, 680 }, |
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{ 0x0034, 696 }, |
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{ 0x00b4, 712 }, |
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{ 0x0020, 728 }, |
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{ 0x00a0, 744 }, |
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{ 0x0050, 760 }, |
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{ 0x00d0, 776 }, |
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{ 0x004a, 792 }, |
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{ 0x00ca, 808 }, |
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{ 0x002a, 824 }, |
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{ 0x00aa, 840 }, |
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{ 0x0024, 856 }, |
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{ 0x00a4, 872 }, |
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{ 0x001a, 888 }, |
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{ 0x009a, 904 }, |
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{ 0x005a, 920 }, |
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{ 0x00da, 936 }, |
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{ 0x0052, 952 }, |
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{ 0x00d2, 968 }, |
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{ 0x004c, 984 }, |
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{ 0x00cc, 1000 }, |
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{ 0x002c, 1016 }, |
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{ 0, 0 } |
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}; |
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static const struct proto TermB[] = { |
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{ 0x03b0, 10 }, |
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{ 0x0002, 19 }, |
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{ 0x0003, 34 }, |
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{ 0x0001, 50 }, |
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{ 0x0006, 67 }, |
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{ 0x000c, 84 }, |
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{ 0x0004, 100 }, |
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{ 0x0018, 117 }, |
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{ 0x0028, 134 }, |
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{ 0x0008, 150 }, |
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{ 0x0010, 167 }, |
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{ 0x0050, 183 }, |
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{ 0x0070, 199 }, |
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{ 0x0020, 216 }, |
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{ 0x00e0, 232 }, |
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{ 0x0030, 249 }, |
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{ 0x03a0, 266 }, |
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{ 0x0060, 282 }, |
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{ 0x0040, 298 }, |
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{ 0x0730, 315 }, |
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{ 0x00b0, 331 }, |
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{ 0x01b0, 347 }, |
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{ 0x0760, 363 }, |
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{ 0x00a0, 379 }, |
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{ 0x0740, 395 }, |
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{ 0x00c0, 411 }, |
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{ 0x0530, 428 }, |
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{ 0x0d30, 444 }, |
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{ 0x0330, 460 }, |
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{ 0x0b30, 476 }, |
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{ 0x0160, 492 }, |
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{ 0x0960, 508 }, |
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{ 0x0560, 524 }, |
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{ 0x0d60, 540 }, |
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{ 0x04b0, 556 }, |
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{ 0x0cb0, 572 }, |
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{ 0x02b0, 588 }, |
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{ 0x0ab0, 604 }, |
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{ 0x06b0, 620 }, |
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{ 0x0eb0, 636 }, |
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{ 0x0360, 652 }, |
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{ 0x0b60, 668 }, |
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{ 0x05b0, 684 }, |
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{ 0x0db0, 700 }, |
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{ 0x02a0, 716 }, |
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{ 0x0aa0, 732 }, |
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{ 0x06a0, 748 }, |
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{ 0x0ea0, 764 }, |
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{ 0x0260, 780 }, |
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{ 0x0a60, 796 }, |
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{ 0x04a0, 812 }, |
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{ 0x0ca0, 828 }, |
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{ 0x0240, 844 }, |
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{ 0x0ec0, 860 }, |
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{ 0x01c0, 876 }, |
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{ 0x0e40, 892 }, |
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{ 0x0140, 908 }, |
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{ 0x01a0, 924 }, |
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{ 0x09a0, 940 }, |
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{ 0x0d40, 956 }, |
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{ 0x0340, 972 }, |
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{ 0x05a0, 988 }, |
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{ 0x0660, 1004 }, |
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{ 0x0e60, 1020 }, |
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{ 0, 0 } |
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}; |
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static const struct proto ExtH[] = { |
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{ 0x0100, 9 }, |
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{ 0, 0 } |
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}; |
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static const struct proto EOLH[] = { |
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{ 0x0000, 11 }, |
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{ 0, 0 } |
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}; |
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static void |
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FillTable(struct tabent *T, int Size, const struct proto *P, int State) |
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{ |
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int limit = 1 << Size; |
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while (P->val) { |
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int width = P->val & 15; |
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int param = P->val >> 4; |
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int incr = 1 << width; |
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int code; |
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for (code = P->code; code < limit; code += incr) { |
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struct tabent *E = T+code; |
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E->State = State; |
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E->Width = width; |
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E->Param = param; |
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} |
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P++; |
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} |
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} |
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/* initialise the huffman code tables */ |
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void |
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fax_init_tables() |
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{ |
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static bool already_initialized = false; |
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if (already_initialized) { |
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return; |
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} |
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already_initialized = true; |
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FillTable(MainTable, 7, Pass, S_Pass); |
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FillTable(MainTable, 7, Horiz, S_Horiz); |
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FillTable(MainTable, 7, V0, S_V0); |
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FillTable(MainTable, 7, VR, S_VR); |
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FillTable(MainTable, 7, VL, S_VL); |
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FillTable(MainTable, 7, ExtV, S_Ext); |
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FillTable(MainTable, 7, EOLV, S_EOL); |
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FillTable(WhiteTable, 12, MakeUpW, S_MakeUpW); |
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FillTable(WhiteTable, 12, MakeUp, S_MakeUp); |
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FillTable(WhiteTable, 12, TermW, S_TermW); |
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FillTable(WhiteTable, 12, ExtH, S_Ext); |
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FillTable(WhiteTable, 12, EOLH, S_EOL); |
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FillTable(BlackTable, 13, MakeUpB, S_MakeUpB); |
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FillTable(BlackTable, 13, MakeUp, S_MakeUp); |
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FillTable(BlackTable, 13, TermB, S_TermB); |
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FillTable(BlackTable, 13, ExtH, S_Ext); |
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FillTable(BlackTable, 13, EOLH, S_EOL); |
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}
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