File: t4.h

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/* $Id$ */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and 
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 * 
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
 * 
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 */

#ifndef _T4_
#define	_T4_
/*
 * CCITT T.4 1D Huffman runlength codes and
 * related definitions.  Given the small sizes
 * of these tables it does not seem
 * worthwhile to make code & length 8 bits.
 */
typedef struct tableentry {
    unsigned short length;	/* bit length of g3 code */
    unsigned short code;	/* g3 code */
    short	runlen;		/* run length in bits */
} tableentry;

#define	EOL	0x001	/* EOL code value - 0000 0000 0000 1 */

/* status values returned instead of a run length */
#define	G3CODE_EOL	-1	/* NB: ACT_EOL - ACT_WRUNT */
#define	G3CODE_INVALID	-2	/* NB: ACT_INVALID - ACT_WRUNT */
#define	G3CODE_EOF	-3	/* end of input data */
#define	G3CODE_INCOMP	-4	/* incomplete run code */

/*
 * Note that these tables are ordered such that the
 * index into the table is known to be either the
 * run length, or (run length / 64) + a fixed offset.
 *
 * NB: The G3CODE_INVALID entries are only used
 *     during state generation (see mkg3states.c).
 */
#ifdef G3CODES
const tableentry TIFFFaxWhiteCodes[] = {
    { 8, 0x35, 0 },	/* 0011 0101 */
    { 6, 0x7, 1 },	/* 0001 11 */
    { 4, 0x7, 2 },	/* 0111 */
    { 4, 0x8, 3 },	/* 1000 */
    { 4, 0xB, 4 },	/* 1011 */
    { 4, 0xC, 5 },	/* 1100 */
    { 4, 0xE, 6 },	/* 1110 */
    { 4, 0xF, 7 },	/* 1111 */
    { 5, 0x13, 8 },	/* 1001 1 */
    { 5, 0x14, 9 },	/* 1010 0 */
    { 5, 0x7, 10 },	/* 0011 1 */
    { 5, 0x8, 11 },	/* 0100 0 */
    { 6, 0x8, 12 },	/* 0010 00 */
    { 6, 0x3, 13 },	/* 0000 11 */
    { 6, 0x34, 14 },	/* 1101 00 */
    { 6, 0x35, 15 },	/* 1101 01 */
    { 6, 0x2A, 16 },	/* 1010 10 */
    { 6, 0x2B, 17 },	/* 1010 11 */
    { 7, 0x27, 18 },	/* 0100 111 */
    { 7, 0xC, 19 },	/* 0001 100 */
    { 7, 0x8, 20 },	/* 0001 000 */
    { 7, 0x17, 21 },	/* 0010 111 */
    { 7, 0x3, 22 },	/* 0000 011 */
    { 7, 0x4, 23 },	/* 0000 100 */
    { 7, 0x28, 24 },	/* 0101 000 */
    { 7, 0x2B, 25 },	/* 0101 011 */
    { 7, 0x13, 26 },	/* 0010 011 */
    { 7, 0x24, 27 },	/* 0100 100 */
    { 7, 0x18, 28 },	/* 0011 000 */
    { 8, 0x2, 29 },	/* 0000 0010 */
    { 8, 0x3, 30 },	/* 0000 0011 */
    { 8, 0x1A, 31 },	/* 0001 1010 */
    { 8, 0x1B, 32 },	/* 0001 1011 */
    { 8, 0x12, 33 },	/* 0001 0010 */
    { 8, 0x13, 34 },	/* 0001 0011 */
    { 8, 0x14, 35 },	/* 0001 0100 */
    { 8, 0x15, 36 },	/* 0001 0101 */
    { 8, 0x16, 37 },	/* 0001 0110 */
    { 8, 0x17, 38 },	/* 0001 0111 */
    { 8, 0x28, 39 },	/* 0010 1000 */
    { 8, 0x29, 40 },	/* 0010 1001 */
    { 8, 0x2A, 41 },	/* 0010 1010 */
    { 8, 0x2B, 42 },	/* 0010 1011 */
    { 8, 0x2C, 43 },	/* 0010 1100 */
    { 8, 0x2D, 44 },	/* 0010 1101 */
    { 8, 0x4, 45 },	/* 0000 0100 */
    { 8, 0x5, 46 },	/* 0000 0101 */
    { 8, 0xA, 47 },	/* 0000 1010 */
    { 8, 0xB, 48 },	/* 0000 1011 */
    { 8, 0x52, 49 },	/* 0101 0010 */
    { 8, 0x53, 50 },	/* 0101 0011 */
    { 8, 0x54, 51 },	/* 0101 0100 */
    { 8, 0x55, 52 },	/* 0101 0101 */
    { 8, 0x24, 53 },	/* 0010 0100 */
    { 8, 0x25, 54 },	/* 0010 0101 */
    { 8, 0x58, 55 },	/* 0101 1000 */
    { 8, 0x59, 56 },	/* 0101 1001 */
    { 8, 0x5A, 57 },	/* 0101 1010 */
    { 8, 0x5B, 58 },	/* 0101 1011 */
    { 8, 0x4A, 59 },	/* 0100 1010 */
    { 8, 0x4B, 60 },	/* 0100 1011 */
    { 8, 0x32, 61 },	/* 0011 0010 */
    { 8, 0x33, 62 },	/* 0011 0011 */
    { 8, 0x34, 63 },	/* 0011 0100 */
    { 5, 0x1B, 64 },	/* 1101 1 */
    { 5, 0x12, 128 },	/* 1001 0 */
    { 6, 0x17, 192 },	/* 0101 11 */
    { 7, 0x37, 256 },	/* 0110 111 */
    { 8, 0x36, 320 },	/* 0011 0110 */
    { 8, 0x37, 384 },	/* 0011 0111 */
    { 8, 0x64, 448 },	/* 0110 0100 */
    { 8, 0x65, 512 },	/* 0110 0101 */
    { 8, 0x68, 576 },	/* 0110 1000 */
    { 8, 0x67, 640 },	/* 0110 0111 */
    { 9, 0xCC, 704 },	/* 0110 0110 0 */
    { 9, 0xCD, 768 },	/* 0110 0110 1 */
    { 9, 0xD2, 832 },	/* 0110 1001 0 */
    { 9, 0xD3, 896 },	/* 0110 1001 1 */
    { 9, 0xD4, 960 },	/* 0110 1010 0 */
    { 9, 0xD5, 1024 },	/* 0110 1010 1 */
    { 9, 0xD6, 1088 },	/* 0110 1011 0 */
    { 9, 0xD7, 1152 },	/* 0110 1011 1 */
    { 9, 0xD8, 1216 },	/* 0110 1100 0 */
    { 9, 0xD9, 1280 },	/* 0110 1100 1 */
    { 9, 0xDA, 1344 },	/* 0110 1101 0 */
    { 9, 0xDB, 1408 },	/* 0110 1101 1 */
    { 9, 0x98, 1472 },	/* 0100 1100 0 */
    { 9, 0x99, 1536 },	/* 0100 1100 1 */
    { 9, 0x9A, 1600 },	/* 0100 1101 0 */
    { 6, 0x18, 1664 },	/* 0110 00 */
    { 9, 0x9B, 1728 },	/* 0100 1101 1 */
    { 11, 0x8, 1792 },	/* 0000 0001 000 */
    { 11, 0xC, 1856 },	/* 0000 0001 100 */
    { 11, 0xD, 1920 },	/* 0000 0001 101 */
    { 12, 0x12, 1984 },	/* 0000 0001 0010 */
    { 12, 0x13, 2048 },	/* 0000 0001 0011 */
    { 12, 0x14, 2112 },	/* 0000 0001 0100 */
    { 12, 0x15, 2176 },	/* 0000 0001 0101 */
    { 12, 0x16, 2240 },	/* 0000 0001 0110 */
    { 12, 0x17, 2304 },	/* 0000 0001 0111 */
    { 12, 0x1C, 2368 },	/* 0000 0001 1100 */
    { 12, 0x1D, 2432 },	/* 0000 0001 1101 */
    { 12, 0x1E, 2496 },	/* 0000 0001 1110 */
    { 12, 0x1F, 2560 },	/* 0000 0001 1111 */
    { 12, 0x1, G3CODE_EOL },	/* 0000 0000 0001 */
    { 9, 0x1, G3CODE_INVALID },	/* 0000 0000 1 */
    { 10, 0x1, G3CODE_INVALID },	/* 0000 0000 01 */
    { 11, 0x1, G3CODE_INVALID },	/* 0000 0000 001 */
    { 12, 0x0, G3CODE_INVALID },	/* 0000 0000 0000 */
};

const tableentry TIFFFaxBlackCodes[] = {
    { 10, 0x37, 0 },	/* 0000 1101 11 */
    { 3, 0x2, 1 },	/* 010 */
    { 2, 0x3, 2 },	/* 11 */
    { 2, 0x2, 3 },	/* 10 */
    { 3, 0x3, 4 },	/* 011 */
    { 4, 0x3, 5 },	/* 0011 */
    { 4, 0x2, 6 },	/* 0010 */
    { 5, 0x3, 7 },	/* 0001 1 */
    { 6, 0x5, 8 },	/* 0001 01 */
    { 6, 0x4, 9 },	/* 0001 00 */
    { 7, 0x4, 10 },	/* 0000 100 */
    { 7, 0x5, 11 },	/* 0000 101 */
    { 7, 0x7, 12 },	/* 0000 111 */
    { 8, 0x4, 13 },	/* 0000 0100 */
    { 8, 0x7, 14 },	/* 0000 0111 */
    { 9, 0x18, 15 },	/* 0000 1100 0 */
    { 10, 0x17, 16 },	/* 0000 0101 11 */
    { 10, 0x18, 17 },	/* 0000 0110 00 */
    { 10, 0x8, 18 },	/* 0000 0010 00 */
    { 11, 0x67, 19 },	/* 0000 1100 111 */
    { 11, 0x68, 20 },	/* 0000 1101 000 */
    { 11, 0x6C, 21 },	/* 0000 1101 100 */
    { 11, 0x37, 22 },	/* 0000 0110 111 */
    { 11, 0x28, 23 },	/* 0000 0101 000 */
    { 11, 0x17, 24 },	/* 0000 0010 111 */
    { 11, 0x18, 25 },	/* 0000 0011 000 */
    { 12, 0xCA, 26 },	/* 0000 1100 1010 */
    { 12, 0xCB, 27 },	/* 0000 1100 1011 */
    { 12, 0xCC, 28 },	/* 0000 1100 1100 */
    { 12, 0xCD, 29 },	/* 0000 1100 1101 */
    { 12, 0x68, 30 },	/* 0000 0110 1000 */
    { 12, 0x69, 31 },	/* 0000 0110 1001 */
    { 12, 0x6A, 32 },	/* 0000 0110 1010 */
    { 12, 0x6B, 33 },	/* 0000 0110 1011 */
    { 12, 0xD2, 34 },	/* 0000 1101 0010 */
    { 12, 0xD3, 35 },	/* 0000 1101 0011 */
    { 12, 0xD4, 36 },	/* 0000 1101 0100 */
    { 12, 0xD5, 37 },	/* 0000 1101 0101 */
    { 12, 0xD6, 38 },	/* 0000 1101 0110 */
    { 12, 0xD7, 39 },	/* 0000 1101 0111 */
    { 12, 0x6C, 40 },	/* 0000 0110 1100 */
    { 12, 0x6D, 41 },	/* 0000 0110 1101 */
    { 12, 0xDA, 42 },	/* 0000 1101 1010 */
    { 12, 0xDB, 43 },	/* 0000 1101 1011 */
    { 12, 0x54, 44 },	/* 0000 0101 0100 */
    { 12, 0x55, 45 },	/* 0000 0101 0101 */
    { 12, 0x56, 46 },	/* 0000 0101 0110 */
    { 12, 0x57, 47 },	/* 0000 0101 0111 */
    { 12, 0x64, 48 },	/* 0000 0110 0100 */
    { 12, 0x65, 49 },	/* 0000 0110 0101 */
    { 12, 0x52, 50 },	/* 0000 0101 0010 */
    { 12, 0x53, 51 },	/* 0000 0101 0011 */
    { 12, 0x24, 52 },	/* 0000 0010 0100 */
    { 12, 0x37, 53 },	/* 0000 0011 0111 */
    { 12, 0x38, 54 },	/* 0000 0011 1000 */
    { 12, 0x27, 55 },	/* 0000 0010 0111 */
    { 12, 0x28, 56 },	/* 0000 0010 1000 */
    { 12, 0x58, 57 },	/* 0000 0101 1000 */
    { 12, 0x59, 58 },	/* 0000 0101 1001 */
    { 12, 0x2B, 59 },	/* 0000 0010 1011 */
    { 12, 0x2C, 60 },	/* 0000 0010 1100 */
    { 12, 0x5A, 61 },	/* 0000 0101 1010 */
    { 12, 0x66, 62 },	/* 0000 0110 0110 */
    { 12, 0x67, 63 },	/* 0000 0110 0111 */
    { 10, 0xF, 64 },	/* 0000 0011 11 */
    { 12, 0xC8, 128 },	/* 0000 1100 1000 */
    { 12, 0xC9, 192 },	/* 0000 1100 1001 */
    { 12, 0x5B, 256 },	/* 0000 0101 1011 */
    { 12, 0x33, 320 },	/* 0000 0011 0011 */
    { 12, 0x34, 384 },	/* 0000 0011 0100 */
    { 12, 0x35, 448 },	/* 0000 0011 0101 */
    { 13, 0x6C, 512 },	/* 0000 0011 0110 0 */
    { 13, 0x6D, 576 },	/* 0000 0011 0110 1 */
    { 13, 0x4A, 640 },	/* 0000 0010 0101 0 */
    { 13, 0x4B, 704 },	/* 0000 0010 0101 1 */
    { 13, 0x4C, 768 },	/* 0000 0010 0110 0 */
    { 13, 0x4D, 832 },	/* 0000 0010 0110 1 */
    { 13, 0x72, 896 },	/* 0000 0011 1001 0 */
    { 13, 0x73, 960 },	/* 0000 0011 1001 1 */
    { 13, 0x74, 1024 },	/* 0000 0011 1010 0 */
    { 13, 0x75, 1088 },	/* 0000 0011 1010 1 */
    { 13, 0x76, 1152 },	/* 0000 0011 1011 0 */
    { 13, 0x77, 1216 },	/* 0000 0011 1011 1 */
    { 13, 0x52, 1280 },	/* 0000 0010 1001 0 */
    { 13, 0x53, 1344 },	/* 0000 0010 1001 1 */
    { 13, 0x54, 1408 },	/* 0000 0010 1010 0 */
    { 13, 0x55, 1472 },	/* 0000 0010 1010 1 */
    { 13, 0x5A, 1536 },	/* 0000 0010 1101 0 */
    { 13, 0x5B, 1600 },	/* 0000 0010 1101 1 */
    { 13, 0x64, 1664 },	/* 0000 0011 0010 0 */
    { 13, 0x65, 1728 },	/* 0000 0011 0010 1 */
    { 11, 0x8, 1792 },	/* 0000 0001 000 */
    { 11, 0xC, 1856 },	/* 0000 0001 100 */
    { 11, 0xD, 1920 },	/* 0000 0001 101 */
    { 12, 0x12, 1984 },	/* 0000 0001 0010 */
    { 12, 0x13, 2048 },	/* 0000 0001 0011 */
    { 12, 0x14, 2112 },	/* 0000 0001 0100 */
    { 12, 0x15, 2176 },	/* 0000 0001 0101 */
    { 12, 0x16, 2240 },	/* 0000 0001 0110 */
    { 12, 0x17, 2304 },	/* 0000 0001 0111 */
    { 12, 0x1C, 2368 },	/* 0000 0001 1100 */
    { 12, 0x1D, 2432 },	/* 0000 0001 1101 */
    { 12, 0x1E, 2496 },	/* 0000 0001 1110 */
    { 12, 0x1F, 2560 },	/* 0000 0001 1111 */
    { 12, 0x1, G3CODE_EOL },	/* 0000 0000 0001 */
    { 9, 0x1, G3CODE_INVALID },	/* 0000 0000 1 */
    { 10, 0x1, G3CODE_INVALID },	/* 0000 0000 01 */
    { 11, 0x1, G3CODE_INVALID },	/* 0000 0000 001 */
    { 12, 0x0, G3CODE_INVALID },	/* 0000 0000 0000 */
};
#else
extern	const tableentry TIFFFaxWhiteCodes[];
extern	const tableentry TIFFFaxBlackCodes[];
#endif
#endif /* _T4_ */