xtifffaxdecoder.java

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package org.libtiff.jai.codecimpl;

/*
 * XTIFF: eXtensible TIFF libraries for JAI.
 * 
 * The contents of this file are subject to the  JAVA ADVANCED IMAGING
 * SAMPLE INPUT-OUTPUT CODECS AND WIDGET HANDLING SOURCE CODE  License
 * Version 1.0 (the "License"); You may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.sun.com/software/imaging/JAI/index.html
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License. 
 *
 * The Original Code is JAVA ADVANCED IMAGING SAMPLE INPUT-OUTPUT CODECS
 * AND WIDGET HANDLING SOURCE CODE. 
 * The Initial Developer of the Original Code is: Sun Microsystems, Inc..
 * Portions created by: Niles Ritter 
 * are Copyright (C): Niles Ritter, GeoTIFF.org, 1999,2000.
 * All Rights Reserved.
 * Contributor(s): Niles Ritter
 */

import org.libtiff.jai.util.JaiI18N;

// Expose the class (mistake in JAI?)

public class XTIFFFaxDecoder {

    private int bitPointer, bytePointer;
    private byte[] data;
    private int w, h;
    private int fillOrder;

    // Data structures needed to store changing elements for the previous
    // and the current scanline
    private int changingElemSize = 0;
    private int prevChangingElems[];
    private int currChangingElems[];

    // Element at which to start search in getNextChangingElement
    private int lastChangingElement = 0;

    private int compression = 2;

    // Variables set by T4Options
    private int uncompressedMode = 0;
    private int fillBits = 0;
    private int oneD;

    static int table1[] = { 0x00, // 0 bits are left in first byte - SHOULD
                                    // NOT HAPPEN
            0x01, // 1 bits are left in first byte
            0x03, // 2 bits are left in first byte
            0x07, // 3 bits are left in first byte
            0x0f, // 4 bits are left in first byte
            0x1f, // 5 bits are left in first byte
            0x3f, // 6 bits are left in first byte
            0x7f, // 7 bits are left in first byte
            0xff // 8 bits are left in first byte
    };

    static int table2[] = { 0x00, // 0
            0x80, // 1
            0xc0, // 2
            0xe0, // 3
            0xf0, // 4
            0xf8, // 5
            0xfc, // 6
            0xfe, // 7
            0xff // 8
    };

    // Table to be used when fillOrder = 2, for flipping bytes.
    static byte flipTable[] = { 0, -128, 64, -64, 32, -96, 96, -32, 16, -112,
            80, -48, 48, -80, 112, -16, 8, -120, 72, -56, 40, -88, 104, -24,
            24, -104, 88, -40, 56, -72, 120, -8, 4, -124, 68, -60, 36, -92,
            100, -28, 20, -108, 84, -44, 52, -76, 116, -12, 12, -116, 76, -52,
            44, -84, 108, -20, 28, -100, 92, -36, 60, -68, 124, -4, 2, -126,
            66, -62, 34, -94, 98, -30, 18, -110, 82, -46, 50, -78, 114, -14,
            10, -118, 74, -54, 42, -86, 106, -22, 26, -102, 90, -38, 58, -70,
            122, -6, 6, -122, 70, -58, 38, -90, 102, -26, 22, -106, 86, -42,
            54, -74, 118, -10, 14, -114, 78, -50, 46, -82, 110, -18, 30, -98,
            94, -34, 62, -66, 126, -2, 1, -127, 65, -63, 33, -95, 97, -31, 17,
            -111, 81, -47, 49, -79, 113, -15, 9, -119, 73, -55, 41, -87, 105,
            -23, 25, -103, 89, -39, 57, -71, 121, -7, 5, -123, 69, -59, 37,
            -91, 101, -27, 21, -107, 85, -43, 53, -75, 117, -11, 13, -115, 77,
            -51, 45, -83, 109, -19, 29, -99, 93, -35, 61, -67, 125, -3, 3,
            -125, 67, -61, 35, -93, 99, -29, 19, -109, 83, -45, 51, -77, 115,
            -13, 11, -117, 75, -53, 43, -85, 107, -21, 27, -101, 91, -37, 59,
            -69, 123, -5, 7, -121, 71, -57, 39, -89, 103, -25, 23, -105, 87,
            -41, 55, -73, 119, -9, 15, -113, 79, -49, 47, -81, 111, -17, 31,
            -97, 95, -33, 63, -65, 127, -1, };

    // The main 10 bit white runs lookup table
    static short white[] = {
    // 0 - 7
            6430, 6400, 6400, 6400, 3225, 3225, 3225, 3225,
            // 8 - 15
            944, 944, 944, 944, 976, 976, 976, 976,
            // 16 - 23
            1456, 1456, 1456, 1456, 1488, 1488, 1488, 1488,
            // 24 - 31
            718, 718, 718, 718, 718, 718, 718, 718,
            // 32 - 39
            750, 750, 750, 750, 750, 750, 750, 750,
            // 40 - 47
            1520, 1520, 1520, 1520, 1552, 1552, 1552, 1552,
            // 48 - 55
            428, 428, 428, 428, 428, 428, 428, 428,
            // 56 - 63
            428, 428, 428, 428, 428, 428, 428, 428,
            // 64 - 71
            654, 654, 654, 654, 654, 654, 654, 654,
            // 72 - 79
            1072, 1072, 1072, 1072, 1104, 1104, 1104, 1104,
            // 80 - 87
            1136, 1136, 1136, 1136, 1168, 1168, 1168, 1168,
            // 88 - 95
            1200, 1200, 1200, 1200, 1232, 1232, 1232, 1232,
            // 96 - 103
            622, 622, 622, 622, 622, 622, 622, 622,
            // 104 - 111
            1008, 1008, 1008, 1008, 1040, 1040, 1040, 1040,
            // 112 - 119
            44, 44, 44, 44, 44, 44, 44, 44,
            // 120 - 127
            44, 44, 44, 44, 44, 44, 44, 44,
            // 128 - 135
            396, 396, 396, 396, 396, 396, 396, 396,
            // 136 - 143
            396, 396, 396, 396, 396, 396, 396, 396,
            // 144 - 151
            1712, 1712, 1712, 1712, 1744, 1744, 1744, 1744,
            // 152 - 159
            846, 846, 846, 846, 846, 846, 846, 846,
            // 160 - 167
            1264, 1264, 1264, 1264, 1296, 1296, 1296, 1296,
            // 168 - 175
            1328, 1328, 1328, 1328, 1360, 1360, 1360, 1360,
            // 176 - 183
            1392, 1392, 1392, 1392, 1424, 1424, 1424, 1424,
            // 184 - 191
            686, 686, 686, 686, 686, 686, 686, 686,
            // 192 - 199
            910, 910, 910, 910, 910, 910, 910, 910,
            // 200 - 207
            1968, 1968, 1968, 1968, 2000, 2000, 2000, 2000,
            // 208 - 215
            2032, 2032, 2032, 2032, 16, 16, 16, 16,
            // 216 - 223
            10257, 10257, 10257, 10257, 12305, 12305, 12305, 12305,
            // 224 - 231
            330, 330, 330, 330, 330, 330, 330, 330,
            // 232 - 239
            330, 330, 330, 330, 330, 330, 330, 330,
            // 240 - 247
            330, 330, 330, 330, 330, 330, 330, 330,
            // 248 - 255
            330, 330, 330, 330, 330, 330, 330, 330,
            // 256 - 263
            362, 362, 362, 362, 362, 362, 362, 362,
            // 264 - 271
            362, 362, 362, 362, 362, 362, 362, 362,
            // 272 - 279
            362, 362, 362, 362, 362, 362, 362, 362,
            // 280 - 287
            362, 362, 362, 362, 362, 362, 362, 362,
            // 288 - 295
            878, 878, 878, 878, 878, 878, 878, 878,
            // 296 - 303
            1904, 1904, 1904, 1904, 1936, 1936, 1936, 1936,
            // 304 - 311
            -18413, -18413, -16365, -16365, -14317, -14317, -10221, -10221,
            // 312 - 319
            590, 590, 590, 590, 590, 590, 590, 590,
            // 320 - 327
            782, 782, 782, 782, 782, 782, 782, 782,
            // 328 - 335
            1584, 1584, 1584, 1584, 1616, 1616, 1616, 1616,
            // 336 - 343
            1648, 1648, 1648, 1648, 1680, 1680, 1680, 1680,
            // 344 - 351
            814, 814, 814, 814, 814, 814, 814, 814,
            // 352 - 359
            1776, 1776, 1776, 1776, 1808, 1808, 1808, 1808,
            // 360 - 367
            1840, 1840, 1840, 1840, 1872, 1872, 1872, 1872,
            // 368 - 375
            6157, 6157, 6157, 6157, 6157, 6157, 6157, 6157,
            // 376 - 383
            6157, 6157, 6157, 6157, 6157, 6157, 6157, 6157,
            // 384 - 391
            -12275, -12275, -12275, -12275, -12275, -12275, -12275, -12275,
            // 392 - 399
            -12275, -12275, -12275, -12275, -12275, -12275, -12275, -12275,
            // 400 - 407
            14353, 14353, 14353, 14353, 16401, 16401, 16401, 16401,
            // 408 - 415
            22547, 22547, 24595, 24595, 20497, 20497, 20497, 20497,
            // 416 - 423
            18449, 18449, 18449, 18449, 26643, 26643, 28691, 28691,
            // 424 - 431
            30739, 30739, -32749, -32749, -30701, -30701, -28653, -28653,
            // 432 - 439
            -26605, -26605, -24557, -24557, -22509, -22509, -20461, -20461,
            // 440 - 447
            8207, 8207, 8207, 8207, 8207, 8207, 8207, 8207,
            // 448 - 455
            72, 72, 72, 72, 72, 72, 72, 72,
            // 456 - 463
            72, 72, 72, 72, 72, 72, 72, 72,
            // 464 - 471
            72, 72, 72, 72, 72, 72, 72, 72,
            // 472 - 479
            72, 72, 72, 72, 72, 72, 72, 72,
            // 480 - 487
            72, 72, 72, 72, 72, 72, 72, 72,
            // 488 - 495
            72, 72, 72, 72, 72, 72, 72, 72,
            // 496 - 503
            72, 72, 72, 72, 72, 72, 72, 72,
            // 504 - 511
            72, 72, 72, 72, 72, 72, 72, 72,
            // 512 - 519
            104, 104, 104, 104, 104, 104, 104, 104,
            // 520 - 527
            104, 104, 104, 104, 104, 104, 104, 104,
            // 528 - 535
            104, 104, 104, 104, 104, 104, 104, 104,
            // 536 - 543
            104, 104, 104, 104, 104, 104, 104, 104,
            // 544 - 551
            104, 104, 104, 104, 104, 104, 104, 104,
            // 552 - 559
            104, 104, 104, 104, 104, 104, 104, 104,
            // 560 - 567
            104, 104, 104, 104, 104, 104, 104, 104,
            // 568 - 575
            104, 104, 104, 104, 104, 104, 104, 104,
            // 576 - 583
            4107, 4107, 4107, 4107, 4107, 4107, 4107, 4107,
            // 584 - 591
            4107, 4107, 4107, 4107, 4107, 4107, 4107, 4107,
            // 592 - 599
            4107, 4107, 4107, 4107, 4107, 4107, 4107, 4107,
            // 600 - 607
            4107, 4107, 4107, 4107, 4107, 4107, 4107, 4107,
            // 608 - 615
            266, 266, 266, 266, 266, 266, 266, 266,
            // 616 - 623
            266, 266, 266, 266, 266, 266, 266, 266,
            // 624 - 631
            266, 266, 266, 266, 266, 266, 266, 266,
            // 632 - 639
            266, 266, 266, 266, 266, 266, 266, 266,
            // 640 - 647
            298, 298, 298, 298, 298, 298, 298, 298,
            // 648 - 655
            298, 298, 298, 298, 298, 298, 298, 298,
            // 656 - 663
            298, 298, 298, 298, 298, 298, 298, 298,
            // 664 - 671
            298, 298, 298, 298, 298, 298, 298, 298,
            // 672 - 679
            524, 524, 524, 524, 524, 524, 524, 524,
            // 680 - 687
            524, 524, 524, 524, 524, 524, 524, 524,
            // 688 - 695
            556, 556, 556, 556, 556, 556, 556, 556,
            // 696 - 703
            556, 556, 556, 556, 556, 556, 556, 556,
            // 704 - 711
            136, 136, 136, 136, 136, 136, 136, 136,
            // 712 - 719
            136, 136, 136, 136, 136, 136, 136, 136,
            // 720 - 727
            136, 136, 136, 136, 136, 136, 136, 136,
            // 728 - 735
            136, 136, 136, 136, 136, 136, 136, 136,
            // 736 - 743
            136, 136, 136, 136, 136, 136, 136, 136,
            // 744 - 751
            136, 136, 136, 136, 136, 136, 136, 136,
            // 752 - 759
            136, 136, 136, 136, 136, 136, 136, 136,
            // 760 - 767
            136, 136, 136, 136, 136, 136, 136, 136,
            // 768 - 775
            168, 168, 168, 168, 168, 168, 168, 168,
            // 776 - 783
            168, 168, 168, 168, 168, 168, 168, 168,
            // 784 - 791
            168, 168, 168, 168, 168, 168, 168, 168,
            // 792 - 799
            168, 168, 168, 168, 168, 168, 168, 168,
            // 800 - 807
            168, 168, 168, 168, 168, 168, 168, 168,
            // 808 - 815
            168, 168, 168, 168, 168, 168, 168, 168,
            // 816 - 823
            168, 168, 168, 168, 168, 168, 168, 168,
            // 824 - 831
            168, 168, 168, 168, 168, 168, 168, 168,
            // 832 - 839
            460, 460, 460, 460, 460, 460, 460, 460,
            // 840 - 847
            460, 460, 460, 460, 460, 460, 460, 460,
            // 848 - 855
            492, 492, 492, 492, 492, 492, 492, 492,
            // 856 - 863
            492, 492, 492, 492, 492, 492, 492, 492,
            // 864 - 871
            2059, 2059, 2059, 2059, 2059, 2059, 2059, 2059,
            // 872 - 879
            2059, 2059, 2059, 2059, 2059, 2059, 2059, 2059,
            // 880 - 887
            2059, 2059, 2059, 2059, 2059, 2059, 2059, 2059,
            // 888 - 895
            2059, 2059, 2059, 2059, 2059, 2059, 2059, 2059,
            // 896 - 903
            200, 200, 200, 200, 200, 200, 200, 200,
            // 904 - 911
            200, 200, 200, 200, 200, 200, 200, 200,
            // 912 - 919
            200, 200, 200, 200, 200, 200, 200, 200,
            // 920 - 927
            200, 200, 200, 200, 200, 200, 200, 200,
            // 928 - 935
            200, 200, 200, 200, 200, 200, 200, 200,
            // 936 - 943
            200, 200, 200, 200, 200, 200, 200, 200,
            // 944 - 951
            200, 200, 200, 200, 200, 200, 200, 200,
            // 952 - 959
            200, 200, 200, 200, 200, 200, 200, 200,
            // 960 - 967
            232, 232, 232, 232, 232, 232, 232, 232,
            // 968 - 975
            232, 232, 232, 232, 232, 232, 232, 232,
            // 976 - 983
            232, 232, 232, 232, 232, 232, 232, 232,
            // 984 - 991
            232, 232, 232, 232, 232, 232, 232, 232,
            // 992 - 999
            232, 232, 232, 232, 232, 232, 232, 232,
            // 1000 - 1007
            232, 232, 232, 232, 232, 232, 232, 232,
            // 1008 - 1015
            232, 232, 232, 232, 232, 232, 232, 232,
            // 1016 - 1023
            232, 232, 232, 232, 232, 232, 232, 232, };

    // Additional make up codes for both White and Black runs
    static short additionalMakeup[] = { 28679, 28679, 31752, (short) 32777,