file-viewer/packages/renderers/ofd/vendor/dltech/jbig2/ccitt.js

/* Copyright 2012 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/* Copyright 1996-2003 Glyph & Cog, LLC
 *
 * The CCITT stream implementation contained in this file is a JavaScript port
 * of XPDF's implementation, made available under the Apache 2.0 open source
 * license.
 */

/**
 * @typedef {Object} CCITTFaxDecoderSource
 * @property {function} next - Method that return one byte of data for decoding,
 *   or -1 when EOF is reached.
 */

import { info } from "./util.js";

const CCITTFaxDecoder = (function CCITTFaxDecoder() {
  const ccittEOL = -2;
  const ccittEOF = -1;
  const twoDimPass = 0;
  const twoDimHoriz = 1;
  const twoDimVert0 = 2;
  const twoDimVertR1 = 3;
  const twoDimVertL1 = 4;
  const twoDimVertR2 = 5;
  const twoDimVertL2 = 6;
  const twoDimVertR3 = 7;
  const twoDimVertL3 = 8;

  // prettier-ignore
  const twoDimTable = [
    [-1, -1], [-1, -1],                   // 000000x
    [7, twoDimVertL3],                    // 0000010
    [7, twoDimVertR3],                    // 0000011
    [6, twoDimVertL2], [6, twoDimVertL2], // 000010x
    [6, twoDimVertR2], [6, twoDimVertR2], // 000011x
    [4, twoDimPass], [4, twoDimPass],     // 0001xxx
    [4, twoDimPass], [4, twoDimPass],
    [4, twoDimPass], [4, twoDimPass],
    [4, twoDimPass], [4, twoDimPass],
    [3, twoDimHoriz], [3, twoDimHoriz],   // 001xxxx
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimHoriz], [3, twoDimHoriz],
    [3, twoDimVertL1], [3, twoDimVertL1], // 010xxxx
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertL1], [3, twoDimVertL1],
    [3, twoDimVertR1], [3, twoDimVertR1], // 011xxxx
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [3, twoDimVertR1], [3, twoDimVertR1],
    [1, twoDimVert0], [1, twoDimVert0],   // 1xxxxxx
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0],
    [1, twoDimVert0], [1, twoDimVert0]
  ];

  // prettier-ignore
  const whiteTable1 = [
    [-1, -1],                               // 00000
    [12, ccittEOL],                         // 00001
    [-1, -1], [-1, -1],                     // 0001x
    [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 001xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 010xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 011xx
    [11, 1792], [11, 1792],                 // 1000x
    [12, 1984],                             // 10010
    [12, 2048],                             // 10011
    [12, 2112],                             // 10100
    [12, 2176],                             // 10101
    [12, 2240],                             // 10110
    [12, 2304],                             // 10111
    [11, 1856], [11, 1856],                 // 1100x
    [11, 1920], [11, 1920],                 // 1101x
    [12, 2368],                             // 11100
    [12, 2432],                             // 11101
    [12, 2496],                             // 11110
    [12, 2560]                              // 11111
  ];

  // prettier-ignore
  const whiteTable2 = [
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],     // 0000000xx
    [8, 29], [8, 29],                           // 00000010x
    [8, 30], [8, 30],                           // 00000011x
    [8, 45], [8, 45],                           // 00000100x
    [8, 46], [8, 46],                           // 00000101x
    [7, 22], [7, 22], [7, 22], [7, 22],         // 0000011xx
    [7, 23], [7, 23], [7, 23], [7, 23],         // 0000100xx
    [8, 47], [8, 47],                           // 00001010x
    [8, 48], [8, 48],                           // 00001011x
    [6, 13], [6, 13], [6, 13], [6, 13],         // 000011xxx
    [6, 13], [6, 13], [6, 13], [6, 13],
    [7, 20], [7, 20], [7, 20], [7, 20],         // 0001000xx
    [8, 33], [8, 33],                           // 00010010x
    [8, 34], [8, 34],                           // 00010011x
    [8, 35], [8, 35],                           // 00010100x
    [8, 36], [8, 36],                           // 00010101x
    [8, 37], [8, 37],                           // 00010110x
    [8, 38], [8, 38],                           // 00010111x
    [7, 19], [7, 19], [7, 19], [7, 19],         // 0001100xx
    [8, 31], [8, 31],                           // 00011010x
    [8, 32], [8, 32],                           // 00011011x
    [6, 1], [6, 1], [6, 1], [6, 1],             // 000111xxx
    [6, 1], [6, 1], [6, 1], [6, 1],
    [6, 12], [6, 12], [6, 12], [6, 12],         // 001000xxx
    [6, 12], [6, 12], [6, 12], [6, 12],
    [8, 53], [8, 53],                           // 00100100x
    [8, 54], [8, 54],                           // 00100101x
    [7, 26], [7, 26], [7, 26], [7, 26],         // 0010011xx
    [8, 39], [8, 39],                           // 00101000x
    [8, 40], [8, 40],                           // 00101001x
    [8, 41], [8, 41],                           // 00101010x
    [8, 42], [8, 42],                           // 00101011x
    [8, 43], [8, 43],                           // 00101100x
    [8, 44], [8, 44],                           // 00101101x
    [7, 21], [7, 21], [7, 21], [7, 21],         // 0010111xx
    [7, 28], [7, 28], [7, 28], [7, 28],         // 0011000xx
    [8, 61], [8, 61],                           // 00110010x
    [8, 62], [8, 62],                           // 00110011x
    [8, 63], [8, 63],                           // 00110100x
    [8, 0], [8, 0],                             // 00110101x
    [8, 320], [8, 320],                         // 00110110x
    [8, 384], [8, 384],                         // 00110111x
    [5, 10], [5, 10], [5, 10], [5, 10],         // 00111xxxx
    [5, 10], [5, 10], [5, 10], [5, 10],
    [5, 10], [5, 10], [5, 10], [5, 10],
    [5, 10], [5, 10], [5, 10], [5, 10],
    [5, 11], [5, 11], [5, 11], [5, 11],         // 01000xxxx
    [5, 11], [5, 11], [5, 11], [5, 11],
    [5, 11], [5, 11], [5, 11], [5, 11],
    [5, 11], [5, 11], [5, 11], [5, 11],
    [7, 27], [7, 27], [7, 27], [7, 27],         // 0100100xx
    [8, 59], [8, 59],                           // 01001010x
    [8, 60], [8, 60],                           // 01001011x
    [9, 1472],                                  // 010011000
    [9, 1536],                                  // 010011001
    [9, 1600],                                  // 010011010
    [9, 1728],                                  // 010011011
    [7, 18], [7, 18], [7, 18], [7, 18],         // 0100111xx
    [7, 24], [7, 24], [7, 24], [7, 24],         // 0101000xx
    [8, 49], [8, 49],                           // 01010010x
    [8, 50], [8, 50],                           // 01010011x
    [8, 51], [8, 51],                           // 01010100x
    [8, 52], [8, 52],                           // 01010101x
    [7, 25], [7, 25], [7, 25], [7, 25],         // 0101011xx
    [8, 55], [8, 55],                           // 01011000x
    [8, 56], [8, 56],                           // 01011001x
    [8, 57], [8, 57],                           // 01011010x
    [8, 58], [8, 58],                           // 01011011x
    [6, 192], [6, 192], [6, 192], [6, 192],     // 010111xxx
    [6, 192], [6, 192], [6, 192], [6, 192],
    [6, 1664], [6, 1664], [6, 1664], [6, 1664], // 011000xxx
    [6, 1664], [6, 1664], [6, 1664], [6, 1664],
    [8, 448], [8, 448],                         // 01100100x
    [8, 512], [8, 512],                         // 01100101x
    [9, 704],                                   // 011001100
    [9, 768],                                   // 011001101
    [8, 640], [8, 640],                         // 01100111x
    [8, 576], [8, 576],                         // 01101000x
    [9, 832],                                   // 011010010
    [9, 896],                                   // 011010011
    [9, 960],                                   // 011010100
    [9, 1024],                                  // 011010101
    [9, 1088],                                  // 011010110
    [9, 1152],                                  // 011010111
    [9, 1216],                                  // 011011000
    [9, 1280],                                  // 011011001
    [9, 1344],                                  // 011011010
    [9, 1408],                                  // 011011011
    [7, 256], [7, 256], [7, 256], [7, 256],     // 0110111xx
    [4, 2], [4, 2], [4, 2], [4, 2],             // 0111xxxxx
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 2], [4, 2], [4, 2], [4, 2],
    [4, 3], [4, 3], [4, 3], [4, 3],             // 1000xxxxx
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [4, 3], [4, 3], [4, 3], [4, 3],
    [5, 128], [5, 128], [5, 128], [5, 128],     // 10010xxxx
    [5, 128], [5, 128], [5, 128], [5, 128],
    [5, 128], [5, 128], [5, 128], [5, 128],
    [5, 128], [5, 128], [5, 128], [5, 128],
    [5, 8], [5, 8], [5, 8], [5, 8],             // 10011xxxx
    [5, 8], [5, 8], [5, 8], [5, 8],
    [5, 8], [5, 8], [5, 8], [5, 8],
    [5, 8], [5, 8], [5, 8], [5, 8],
    [5, 9], [5, 9], [5, 9], [5, 9],             // 10100xxxx
    [5, 9], [5, 9], [5, 9], [5, 9],
    [5, 9], [5, 9], [5, 9], [5, 9],
    [5, 9], [5, 9], [5, 9], [5, 9],
    [6, 16], [6, 16], [6, 16], [6, 16],         // 101010xxx
    [6, 16], [6, 16], [6, 16], [6, 16],
    [6, 17], [6, 17], [6, 17], [6, 17],         // 101011xxx
    [6, 17], [6, 17], [6, 17], [6, 17],
    [4, 4], [4, 4], [4, 4], [4, 4],             // 1011xxxxx
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 4], [4, 4], [4, 4], [4, 4],
    [4, 5], [4, 5], [4, 5], [4, 5],             // 1100xxxxx
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [4, 5], [4, 5], [4, 5], [4, 5],
    [6, 14], [6, 14], [6, 14], [6, 14],         // 110100xxx
    [6, 14], [6, 14], [6, 14], [6, 14],
    [6, 15], [6, 15], [6, 15], [6, 15],         // 110101xxx
    [6, 15], [6, 15], [6, 15], [6, 15],
    [5, 64], [5, 64], [5, 64], [5, 64],         // 11011xxxx
    [5, 64], [5, 64], [5, 64], [5, 64],
    [5, 64], [5, 64], [5, 64], [5, 64],
    [5, 64], [5, 64], [5, 64], [5, 64],
    [4, 6], [4, 6], [4, 6], [4, 6],             // 1110xxxxx
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 6], [4, 6], [4, 6], [4, 6],
    [4, 7], [4, 7], [4, 7], [4, 7],             // 1111xxxxx
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7],
    [4, 7], [4, 7], [4, 7], [4, 7]
  ];

  // prettier-ignore
  const blackTable1 = [
    [-1, -1], [-1, -1],                             // 000000000000x
    [12, ccittEOL], [12, ccittEOL],                 // 000000000001x
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000001xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000010xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000011xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000100xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000101xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000110xx
    [-1, -1], [-1, -1], [-1, -1], [-1, -1],         // 00000000111xx
    [11, 1792], [11, 1792], [11, 1792], [11, 1792], // 00000001000xx
    [12, 1984], [12, 1984],                         // 000000010010x
    [12, 2048], [12, 2048],                         // 000000010011x
    [12, 2112], [12, 2112],                         // 000000010100x
    [12, 2176], [12, 2176],                         // 000000010101x
    [12, 2240], [12, 2240],                         // 000000010110x
    [12, 2304], [12, 2304],                         // 000000010111x
    [11, 1856], [11, 1856], [11, 1856], [11, 1856], // 00000001100xx
    [11, 1920], [11, 1920], [11, 1920], [11, 1920], // 00000001101xx
    [12, 2368], [12, 2368],                         // 000000011100x
    [12, 2432], [12, 2432],                         // 000000011101x
    [12, 2496], [12, 2496],                         // 000000011110x
    [12, 2560], [12, 2560],                         // 000000011111x
    [10, 18], [10, 18], [10, 18], [10, 18],         // 0000001000xxx
    [10, 18], [10, 18], [10, 18], [10, 18],
    [12, 52], [12, 52],                             // 000000100100x
    [13, 640],                                      // 0000001001010
    [13, 704],                                      // 0000001001011
    [13, 768],                                      // 0000001001100
    [13, 832],                                      // 0000001001101
    [12, 55], [12, 55],                             // 000000100111x
    [12, 56], [12, 56],                             // 000000101000x
    [13, 1280],                                     // 0000001010010
    [13, 1344],                                     // 0000001010011
    [13, 1408],                                     // 0000001010100
    [13, 1472],                                     // 0000001010101
    [12, 59], [12, 59],                             // 000000101011x
    [12, 60], [12, 60],                             // 000000101100x
    [13, 1536],                                     // 0000001011010
    [13, 1600],                                     // 0000001011011
    [11, 24], [11, 24], [11, 24], [11, 24],         // 00000010111xx
    [11, 25], [11, 25], [11, 25], [11, 25],         // 00000011000xx
    [13, 1664],                                     // 0000001100100
    [13, 1728],                                     // 0000001100101
    [12, 320], [12, 320],                           // 000000110011x
    [12, 384], [12, 384],                           // 000000110100x
    [12, 448], [12, 448],                           // 000000110101x
    [13, 512],                                      // 0000001101100
    [13, 576],                                      // 0000001101101
    [12, 53], [12, 53],                             // 000000110111x
    [12, 54], [12, 54],                             // 000000111000x
    [13, 896],                                      // 0000001110010
    [13, 960],                                      // 0000001110011
    [13, 1024],                                     // 0000001110100
    [13, 1088],                                     // 0000001110101
    [13, 1152],                                     // 0000001110110
    [13, 1216],                                     // 0000001110111
    [10, 64], [10, 64], [10, 64], [10, 64],         // 0000001111xxx
    [10, 64], [10, 64], [10, 64], [10, 64]
  ];

  // prettier-ignore
  const blackTable2 = [
    [8, 13], [8, 13], [8, 13], [8, 13],     // 00000100xxxx
    [8, 13], [8, 13], [8, 13], [8, 13],
    [8, 13], [8, 13], [8, 13], [8, 13],
    [8, 13], [8, 13], [8, 13], [8, 13],
    [11, 23], [11, 23],                     // 00000101000x
    [12, 50],                               // 000001010010
    [12, 51],                               // 000001010011
    [12, 44],                               // 000001010100
    [12, 45],                               // 000001010101
    [12, 46],                               // 000001010110
    [12, 47],                               // 000001010111
    [12, 57],                               // 000001011000
    [12, 58],                               // 000001011001
    [12, 61],                               // 000001011010
    [12, 256],                              // 000001011011
    [10, 16], [10, 16], [10, 16], [10, 16], // 0000010111xx
    [10, 17], [10, 17], [10, 17], [10, 17], // 0000011000xx
    [12, 48],                               // 000001100100
    [12, 49],                               // 000001100101
    [12, 62],                               // 000001100110
    [12, 63],                               // 000001100111
    [12, 30],                               // 000001101000
    [12, 31],                               // 000001101001
    [12, 32],                               // 000001101010
    [12, 33],                               // 000001101011
    [12, 40],                               // 000001101100
    [12, 41],                               // 000001101101
    [11, 22], [11, 22],                     // 00000110111x
    [8, 14], [8, 14], [8, 14], [8, 14],     // 00000111xxxx
    [8, 14], [8, 14], [8, 14], [8, 14],
    [8, 14], [8, 14], [8, 14], [8, 14],
    [8, 14], [8, 14], [8, 14], [8, 14],
    [7, 10], [7, 10], [7, 10], [7, 10],     // 0000100xxxxx
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 10], [7, 10], [7, 10], [7, 10],
    [7, 11], [7, 11], [7, 11], [7, 11],     // 0000101xxxxx
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [7, 11], [7, 11], [7, 11], [7, 11],
    [9, 15], [9, 15], [9, 15], [9, 15],     // 000011000xxx
    [9, 15], [9, 15], [9, 15], [9, 15],
    [12, 128],                              // 000011001000
    [12, 192],                              // 000011001001
    [12, 26],                               // 000011001010
    [12, 27],                               // 000011001011
    [12, 28],                               // 000011001100
    [12, 29],                               // 000011001101
    [11, 19], [11, 19],                     // 00001100111x
    [11, 20], [11, 20],                     // 00001101000x
    [12, 34],                               // 000011010010
    [12, 35],                               // 000011010011
    [12, 36],                               // 000011010100
    [12, 37],                               // 000011010101
    [12, 38],                               // 000011010110
    [12, 39],                               // 000011010111
    [11, 21], [11, 21],                     // 00001101100x
    [12, 42],                               // 000011011010
    [12, 43],                               // 000011011011
    [10, 0], [10, 0], [10, 0], [10, 0],     // 0000110111xx
    [7, 12], [7, 12], [7, 12], [7, 12],     // 0000111xxxxx
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12],
    [7, 12], [7, 12], [7, 12], [7, 12]
  ];

  // prettier-ignore
  const blackTable3 = [
    [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000xx
    [6, 9],                                 // 000100
    [6, 8],                                 // 000101
    [5, 7], [5, 7],                         // 00011x
    [4, 6], [4, 6], [4, 6], [4, 6],         // 0010xx
    [4, 5], [4, 5], [4, 5], [4, 5],         // 0011xx
    [3, 1], [3, 1], [3, 1], [3, 1],         // 010xxx
    [3, 1], [3, 1], [3, 1], [3, 1],
    [3, 4], [3, 4], [3, 4], [3, 4],         // 011xxx
    [3, 4], [3, 4], [3, 4], [3, 4],
    [2, 3], [2, 3], [2, 3], [2, 3],         // 10xxxx
    [2, 3], [2, 3], [2, 3], [2, 3],
    [2, 3], [2, 3], [2, 3], [2, 3],
    [2, 3], [2, 3], [2, 3], [2, 3],
    [2, 2], [2, 2], [2, 2], [2, 2],         // 11xxxx
    [2, 2], [2, 2], [2, 2], [2, 2],
    [2, 2], [2, 2], [2, 2], [2, 2],
    [2, 2], [2, 2], [2, 2], [2, 2]
  ];

  /**
   * @param {CCITTFaxDecoderSource} source - The data which should be decoded.
   * @param {Object} [options] - Decoding options.
   */
  // eslint-disable-next-line no-shadow
  function CCITTFaxDecoder(source, options = {}) {
    if (!source || typeof source.next !== "function") {
      throw new Error('CCITTFaxDecoder - invalid "source" parameter.');
    }
    this.source = source;
    this.eof = false;

    this.encoding = options.K || 0;
    this.eoline = options.EndOfLine || false;
    this.byteAlign = options.EncodedByteAlign || false;
    this.columns = options.Columns || 1728;
    this.rows = options.Rows || 0;
    let eoblock = options.EndOfBlock;
    if (eoblock === null || eoblock === undefined) {
      eoblock = true;
    }
    this.eoblock = eoblock;
    this.black = options.BlackIs1 || false;

    this.codingLine = new Uint32Array(this.columns + 1);
    this.refLine = new Uint32Array(this.columns + 2);

    this.codingLine[0] = this.columns;
    this.codingPos = 0;

    this.row = 0;
    this.nextLine2D = this.encoding < 0;
    this.inputBits = 0;
    this.inputBuf = 0;
    this.outputBits = 0;
    this.rowsDone = false;

    let code1;
    while ((code1 = this._lookBits(12)) === 0) {
      this._eatBits(1);
    }
    if (code1 === 1) {
      this._eatBits(12);
    }
    if (this.encoding > 0) {
      this.nextLine2D = !this._lookBits(1);
      this._eatBits(1);
    }
  }

  CCITTFaxDecoder.prototype = {
    readNextChar() {
      if (this.eof) {
        return -1;
      }
      const refLine = this.refLine;
      const codingLine = this.codingLine;
      const columns = this.columns;

      let refPos, blackPixels, bits, i;

      if (this.outputBits === 0) {
        if (this.rowsDone) {
          this.eof = true;
        }
        if (this.eof) {
          return -1;
        }
        this.err = false;

        let code1, code2, code3;
        if (this.nextLine2D) {
          for (i = 0; codingLine[i] < columns; ++i) {
            refLine[i] = codingLine[i];
          }
          refLine[i++] = columns;
          refLine[i] = columns;
          codingLine[0] = 0;
          this.codingPos = 0;
          refPos = 0;
          blackPixels = 0;

          while (codingLine[this.codingPos] < columns) {
            code1 = this._getTwoDimCode();
            switch (code1) {
              case twoDimPass:
                this._addPixels(refLine[refPos + 1], blackPixels);
                if (refLine[refPos + 1] < columns) {
                  refPos += 2;
                }
                break;
              case twoDimHoriz:
                code1 = code2 = 0;
                if (blackPixels) {
                  do {
                    code1 += code3 = this._getBlackCode();
                  } while (code3 >= 64);
                  do {
                    code2 += code3 = this._getWhiteCode();
                  } while (code3 >= 64);
                } else {
                  do {
                    code1 += code3 = this._getWhiteCode();
                  } while (code3 >= 64);
                  do {
                    code2 += code3 = this._getBlackCode();
                  } while (code3 >= 64);
                }
                this._addPixels(
                  codingLine[this.codingPos] + code1,
                  blackPixels
                );
                if (codingLine[this.codingPos] < columns) {
                  this._addPixels(
                    codingLine[this.codingPos] + code2,
                    blackPixels ^ 1
                  );
                }
                while (
                  refLine[refPos] <= codingLine[this.codingPos] &&
                  refLine[refPos] < columns
                ) {
                  refPos += 2;
                }
                break;
              case twoDimVertR3:
                this._addPixels(refLine[refPos] + 3, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  ++refPos;
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVertR2:
                this._addPixels(refLine[refPos] + 2, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  ++refPos;
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVertR1:
                this._addPixels(refLine[refPos] + 1, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  ++refPos;
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVert0:
                this._addPixels(refLine[refPos], blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  ++refPos;
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVertL3:
                this._addPixelsNeg(refLine[refPos] - 3, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  if (refPos > 0) {
                    --refPos;
                  } else {
                    ++refPos;
                  }
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVertL2:
                this._addPixelsNeg(refLine[refPos] - 2, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  if (refPos > 0) {
                    --refPos;
                  } else {
                    ++refPos;
                  }
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case twoDimVertL1:
                this._addPixelsNeg(refLine[refPos] - 1, blackPixels);
                blackPixels ^= 1;
                if (codingLine[this.codingPos] < columns) {
                  if (refPos > 0) {
                    --refPos;
                  } else {
                    ++refPos;
                  }
                  while (
                    refLine[refPos] <= codingLine[this.codingPos] &&
                    refLine[refPos] < columns
                  ) {
                    refPos += 2;
                  }
                }
                break;
              case ccittEOF:
                this._addPixels(columns, 0);
                this.eof = true;
                break;
              default:
                info("bad 2d code");
                this._addPixels(columns, 0);
                this.err = true;
            }
          }
        } else {
          codingLine[0] = 0;
          this.codingPos = 0;
          blackPixels = 0;
          while (codingLine[this.codingPos] < columns) {
            code1 = 0;
            if (blackPixels) {
              do {
                code1 += code3 = this._getBlackCode();
              } while (code3 >= 64);
            } else {
              do {
                code1 += code3 = this._getWhiteCode();
              } while (code3 >= 64);
            }
            this._addPixels(codingLine[this.codingPos] + code1, blackPixels);
            blackPixels ^= 1;
          }
        }

        let gotEOL = false;

        if (this.byteAlign) {
          this.inputBits &= ~7;
        }

        if (!this.eoblock && this.row === this.rows - 1) {
          this.rowsDone = true;
        } else {
          code1 = this._lookBits(12);
          if (this.eoline) {
            while (code1 !== ccittEOF && code1 !== 1) {
              this._eatBits(1);
              code1 = this._lookBits(12);
            }
          } else {
            while (code1 === 0) {
              this._eatBits(1);
              code1 = this._lookBits(12);
            }
          }
          if (code1 === 1) {
            this._eatBits(12);
            gotEOL = true;
          } else if (code1 === ccittEOF) {
            this.eof = true;
          }
        }

        if (!this.eof && this.encoding > 0 && !this.rowsDone) {
          this.nextLine2D = !this._lookBits(1);
          this._eatBits(1);
        }

        if (this.eoblock && gotEOL && this.byteAlign) {
          code1 = this._lookBits(12);
          if (code1 === 1) {
            this._eatBits(12);
            if (this.encoding > 0) {
              this._lookBits(1);
              this._eatBits(1);
            }
            if (this.encoding >= 0) {
              for (i = 0; i < 4; ++i) {
                code1 = this._lookBits(12);
                if (code1 !== 1) {
                  info("bad rtc code: " + code1);
                }
                this._eatBits(12);
                if (this.encoding > 0) {
                  this._lookBits(1);
                  this._eatBits(1);
                }
              }
            }
            this.eof = true;
          }
        } else if (this.err && this.eoline) {
          while (true) {
            code1 = this._lookBits(13);
            if (code1 === ccittEOF) {
              this.eof = true;
              return -1;
            }
            if (code1 >> 1 === 1) {
              break;
            }
            this._eatBits(1);
          }
          this._eatBits(12);
          if (this.encoding > 0) {
            this._eatBits(1);
            this.nextLine2D = !(code1 & 1);
          }
        }

        if (codingLine[0] > 0) {
          this.outputBits = codingLine[(this.codingPos = 0)];
        } else {
          this.outputBits = codingLine[(this.codingPos = 1)];
        }
        this.row++;
      }

      let c;
      if (this.outputBits >= 8) {
        c = this.codingPos & 1 ? 0 : 0xff;
        this.outputBits -= 8;
        if (this.outputBits === 0 && codingLine[this.codingPos] < columns) {
          this.codingPos++;
          this.outputBits =
            codingLine[this.codingPos] - codingLine[this.codingPos - 1];
        }
      } else {
        bits = 8;
        c = 0;
        do {
          if (this.outputBits > bits) {
            c <<= bits;
            if (!(this.codingPos & 1)) {
              c |= 0xff >> (8 - bits);
            }
            this.outputBits -= bits;
            bits = 0;
          } else {
            c <<= this.outputBits;
            if (!(this.codingPos & 1)) {
              c |= 0xff >> (8 - this.outputBits);
            }
            bits -= this.outputBits;
            this.outputBits = 0;
            if (codingLine[this.codingPos] < columns) {
              this.codingPos++;
              this.outputBits =
                codingLine[this.codingPos] - codingLine[this.codingPos - 1];
            } else if (bits > 0) {
              c <<= bits;
              bits = 0;
            }
          }
        } while (bits);
      }
      if (this.black) {
        c ^= 0xff;
      }
      return c;
    },

    /**
     * @private
     */
    _addPixels(a1, blackPixels) {
      const codingLine = this.codingLine;
      let codingPos = this.codingPos;

      if (a1 > codingLine[codingPos]) {
        if (a1 > this.columns) {
          info("row is wrong length");
          this.err = true;
          a1 = this.columns;
        }
        if ((codingPos & 1) ^ blackPixels) {
          ++codingPos;
        }

        codingLine[codingPos] = a1;
      }
      this.codingPos = codingPos;
    },

    /**
     * @private
     */
    _addPixelsNeg(a1, blackPixels) {
      const codingLine = this.codingLine;
      let codingPos = this.codingPos;

      if (a1 > codingLine[codingPos]) {
        if (a1 > this.columns) {
          info("row is wrong length");
          this.err = true;
          a1 = this.columns;
        }
        if ((codingPos & 1) ^ blackPixels) {
          ++codingPos;
        }

        codingLine[codingPos] = a1;
      } else if (a1 < codingLine[codingPos]) {
        if (a1 < 0) {
          info("invalid code");
          this.err = true;
          a1 = 0;
        }
        while (codingPos > 0 && a1 < codingLine[codingPos - 1]) {
          --codingPos;
        }
        codingLine[codingPos] = a1;
      }

      this.codingPos = codingPos;
    },

    /**
     * This function returns the code found from the table.
     * The start and end parameters set the boundaries for searching the table.
     * The limit parameter is optional. Function returns an array with three
     * values. The first array element indicates whether a valid code is being
     * returned. The second array element is the actual code. The third array
     * element indicates whether EOF was reached.
     * @private
     */
    _findTableCode(start, end, table, limit) {
      const limitValue = limit || 0;
      for (let i = start; i <= end; ++i) {
        let code = this._lookBits(i);
        if (code === ccittEOF) {
          return [true, 1, false];
        }
        if (i < end) {
          code <<= end - i;
        }
        if (!limitValue || code >= limitValue) {
          const p = table[code - limitValue];
          if (p[0] === i) {
            this._eatBits(i);
            return [true, p[1], true];
          }
        }
      }
      return [false, 0, false];
    },

    /**
     * @private
     */
    _getTwoDimCode() {
      let code = 0;
      let p;
      if (this.eoblock) {
        code = this._lookBits(7);
        p = twoDimTable[code];
        if (p && p[0] > 0) {
          this._eatBits(p[0]);
          return p[1];
        }
      } else {
        const result = this._findTableCode(1, 7, twoDimTable);
        if (result[0] && result[2]) {
          return result[1];
        }
      }
      info("Bad two dim code");
      return ccittEOF;
    },

    /**
     * @private
     */
    _getWhiteCode() {
      let code = 0;
      let p;
      if (this.eoblock) {
        code = this._lookBits(12);
        if (code === ccittEOF) {
          return 1;
        }

        if (code >> 5 === 0) {
          p = whiteTable1[code];
        } else {
          p = whiteTable2[code >> 3];
        }

        if (p[0] > 0) {
          this._eatBits(p[0]);
          return p[1];
        }
      } else {
        let result = this._findTableCode(1, 9, whiteTable2);
        if (result[0]) {
          return result[1];
        }

        result = this._findTableCode(11, 12, whiteTable1);
        if (result[0]) {
          return result[1];
        }
      }
      info("bad white code");
      this._eatBits(1);
      return 1;
    },

    /**
     * @private
     */
    _getBlackCode() {
      let code, p;
      if (this.eoblock) {
        code = this._lookBits(13);
        if (code === ccittEOF) {
          return 1;
        }
        if (code >> 7 === 0) {
          p = blackTable1[code];
        } else if (code >> 9 === 0 && code >> 7 !== 0) {
          p = blackTable2[(code >> 1) - 64];
        } else {
          p = blackTable3[code >> 7];
        }

        if (p[0] > 0) {
          this._eatBits(p[0]);
          return p[1];
        }
      } else {
        let result = this._findTableCode(2, 6, blackTable3);
        if (result[0]) {
          return result[1];
        }

        result = this._findTableCode(7, 12, blackTable2, 64);
        if (result[0]) {
          return result[1];
        }

        result = this._findTableCode(10, 13, blackTable1);
        if (result[0]) {
          return result[1];
        }
      }
      info("bad black code");
      this._eatBits(1);
      return 1;
    },

    /**
     * @private
     */
    _lookBits(n) {
      let c;
      while (this.inputBits < n) {
        if ((c = this.source.next()) === -1) {
          if (this.inputBits === 0) {
            return ccittEOF;
          }
          return (this.inputBuf << (n - this.inputBits)) & (0xffff >> (16 - n));
        }
        this.inputBuf = (this.inputBuf << 8) | c;
        this.inputBits += 8;
      }
      return (this.inputBuf >> (this.inputBits - n)) & (0xffff >> (16 - n));
    },

    /**
     * @private
     */
    _eatBits(n) {
      if ((this.inputBits -= n) < 0) {
        this.inputBits = 0;
      }
    },
  };

  return CCITTFaxDecoder;
})();

export { CCITTFaxDecoder };