Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 272700x 272700x 272700x 272700x 272700x 381780x 381780x 381780x 381780x 381780x 270000x 270000x 378000x 378000x 2700x 2700x 270000x 2700x 2700x 3780x 378000x 3780x 3780x 3780x 180x 180x 2700x 180x 180x 180x 252x 3780x 252x 60x 60x 60x 60x 60x 60x 60x 60x 60x 60x 60x 24x 24x 24x 24x 24x 24x 24x 24x 24x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 12x 24x 24x 12x 12x | /**
*
* This code was ported from the dash.js project at:
* https://github.com/Dash-Industry-Forum/dash.js/blob/development/externals/cea608-parser.js
* https://github.com/Dash-Industry-Forum/dash.js/commit/8269b26a761e0853bb21d78780ed945144ecdd4d#diff-71bc295a2d6b6b7093a1d3290d53a4b2
*
* The original copyright appears below:
*
* The copyright in this software is being made available under the BSD License,
* included below. This software may be subject to other third party and contributor
* rights, including patent rights, and no such rights are granted under this license.
*
* Copyright (c) 2015-2016, DASH Industry Forum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* 2. Neither the name of Dash Industry Forum nor the names of its
* contributors may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Exceptions from regular ASCII. CodePoints are mapped to UTF-16 codes
*/
let specialCea608CharsCodes = {
0x2a: 0xe1, // lowercase a, acute accent
0x5c: 0xe9, // lowercase e, acute accent
0x5e: 0xed, // lowercase i, acute accent
0x5f: 0xf3, // lowercase o, acute accent
0x60: 0xfa, // lowercase u, acute accent
0x7b: 0xe7, // lowercase c with cedilla
0x7c: 0xf7, // division symbol
0x7d: 0xd1, // uppercase N tilde
0x7e: 0xf1, // lowercase n tilde
0x7f: 0x2588, // Full block
// THIS BLOCK INCLUDES THE 16 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
// THAT COME FROM HI BYTE=0x11 AND LOW BETWEEN 0x30 AND 0x3F
// THIS MEANS THAT \x50 MUST BE ADDED TO THE VALUES
0x80: 0xae, // Registered symbol (R)
0x81: 0xb0, // degree sign
0x82: 0xbd, // 1/2 symbol
0x83: 0xbf, // Inverted (open) question mark
0x84: 0x2122, // Trademark symbol (TM)
0x85: 0xa2, // Cents symbol
0x86: 0xa3, // Pounds sterling
0x87: 0x266a, // Music 8'th note
0x88: 0xe0, // lowercase a, grave accent
0x89: 0x20, // transparent space (regular)
0x8a: 0xe8, // lowercase e, grave accent
0x8b: 0xe2, // lowercase a, circumflex accent
0x8c: 0xea, // lowercase e, circumflex accent
0x8d: 0xee, // lowercase i, circumflex accent
0x8e: 0xf4, // lowercase o, circumflex accent
0x8f: 0xfb, // lowercase u, circumflex accent
// THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
// THAT COME FROM HI BYTE=0x12 AND LOW BETWEEN 0x20 AND 0x3F
0x90: 0xc1, // capital letter A with acute
0x91: 0xc9, // capital letter E with acute
0x92: 0xd3, // capital letter O with acute
0x93: 0xda, // capital letter U with acute
0x94: 0xdc, // capital letter U with diaresis
0x95: 0xfc, // lowercase letter U with diaeresis
0x96: 0x2018, // opening single quote
0x97: 0xa1, // inverted exclamation mark
0x98: 0x2a, // asterisk
0x99: 0x2019, // closing single quote
0x9a: 0x2501, // box drawings heavy horizontal
0x9b: 0xa9, // copyright sign
0x9c: 0x2120, // Service mark
0x9d: 0x2022, // (round) bullet
0x9e: 0x201c, // Left double quotation mark
0x9f: 0x201d, // Right double quotation mark
0xa0: 0xc0, // uppercase A, grave accent
0xa1: 0xc2, // uppercase A, circumflex
0xa2: 0xc7, // uppercase C with cedilla
0xa3: 0xc8, // uppercase E, grave accent
0xa4: 0xca, // uppercase E, circumflex
0xa5: 0xcb, // capital letter E with diaresis
0xa6: 0xeb, // lowercase letter e with diaresis
0xa7: 0xce, // uppercase I, circumflex
0xa8: 0xcf, // uppercase I, with diaresis
0xa9: 0xef, // lowercase i, with diaresis
0xaa: 0xd4, // uppercase O, circumflex
0xab: 0xd9, // uppercase U, grave accent
0xac: 0xf9, // lowercase u, grave accent
0xad: 0xdb, // uppercase U, circumflex
0xae: 0xab, // left-pointing double angle quotation mark
0xaf: 0xbb, // right-pointing double angle quotation mark
// THIS BLOCK INCLUDES THE 32 EXTENDED (TWO-BYTE) LINE 21 CHARACTERS
// THAT COME FROM HI BYTE=0x13 AND LOW BETWEEN 0x20 AND 0x3F
0xb0: 0xc3, // Uppercase A, tilde
0xb1: 0xe3, // Lowercase a, tilde
0xb2: 0xcd, // Uppercase I, acute accent
0xb3: 0xcc, // Uppercase I, grave accent
0xb4: 0xec, // Lowercase i, grave accent
0xb5: 0xd2, // Uppercase O, grave accent
0xb6: 0xf2, // Lowercase o, grave accent
0xb7: 0xd5, // Uppercase O, tilde
0xb8: 0xf5, // Lowercase o, tilde
0xb9: 0x7b, // Open curly brace
0xba: 0x7d, // Closing curly brace
0xbb: 0x5c, // Backslash
0xbc: 0x5e, // Caret
0xbd: 0x5f, // Underscore
0xbe: 0x7c, // Pipe (vertical line)
0xbf: 0x223c, // Tilde operator
0xc0: 0xc4, // Uppercase A, umlaut
0xc1: 0xe4, // Lowercase A, umlaut
0xc2: 0xd6, // Uppercase O, umlaut
0xc3: 0xf6, // Lowercase o, umlaut
0xc4: 0xdf, // Esszett (sharp S)
0xc5: 0xa5, // Yen symbol
0xc6: 0xa4, // Generic currency sign
0xc7: 0x2503, // Box drawings heavy vertical
0xc8: 0xc5, // Uppercase A, ring
0xc9: 0xe5, // Lowercase A, ring
0xca: 0xd8, // Uppercase O, stroke
0xcb: 0xf8, // Lowercase o, strok
0xcc: 0x250f, // Box drawings heavy down and right
0xcd: 0x2513, // Box drawings heavy down and left
0xce: 0x2517, // Box drawings heavy up and right
0xcf: 0x251b // Box drawings heavy up and left
};
/**
* Utils
*/
let getCharForByte = function (byte) {
let charCode = byte;
if (specialCea608CharsCodes.hasOwnProperty(byte))
charCode = specialCea608CharsCodes[byte];
return String.fromCharCode(charCode);
};
let NR_ROWS = 15,
NR_COLS = 100;
// Tables to look up row from PAC data
let rowsLowCh1 = { 0x11: 1, 0x12: 3, 0x15: 5, 0x16: 7, 0x17: 9, 0x10: 11, 0x13: 12, 0x14: 14 };
let rowsHighCh1 = { 0x11: 2, 0x12: 4, 0x15: 6, 0x16: 8, 0x17: 10, 0x13: 13, 0x14: 15 };
let rowsLowCh2 = { 0x19: 1, 0x1A: 3, 0x1D: 5, 0x1E: 7, 0x1F: 9, 0x18: 11, 0x1B: 12, 0x1C: 14 };
let rowsHighCh2 = { 0x19: 2, 0x1A: 4, 0x1D: 6, 0x1E: 8, 0x1F: 10, 0x1B: 13, 0x1C: 15 };
let backgroundColors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'black', 'transparent'];
/**
* Simple logger class to be able to write with time-stamps and filter on level.
*/
let logger = {
verboseFilter: { 'DATA': 3, 'DEBUG': 3, 'INFO': 2, 'WARNING': 2, 'TEXT': 1, 'ERROR': 0 },
time: null,
verboseLevel: 0, // Only write errors
setTime: function (newTime) {
this.time = newTime;
},
log: function (severity, msg) {
let minLevel = this.verboseFilter[severity];
if (this.verboseLevel >= minLevel)
console.log(this.time + ' [' + severity + '] ' + msg);
}
};
let numArrayToHexArray = function (numArray) {
let hexArray = [];
for (let j = 0; j < numArray.length; j++)
hexArray.push(numArray[j].toString(16));
return hexArray;
};
class PenState {
constructor (foreground, underline, italics, background, flash) {
this.foreground = foreground || 'white';
this.underline = underline || false;
this.italics = italics || false;
this.background = background || 'black';
this.flash = flash || false;
}
reset () {
this.foreground = 'white';
this.underline = false;
this.italics = false;
this.background = 'black';
this.flash = false;
}
setStyles (styles) {
let attribs = ['foreground', 'underline', 'italics', 'background', 'flash'];
for (let i = 0; i < attribs.length; i++) {
let style = attribs[i];
if (styles.hasOwnProperty(style))
this[style] = styles[style];
}
}
isDefault () {
return (this.foreground === 'white' && !this.underline && !this.italics &&
this.background === 'black' && !this.flash);
}
equals (other) {
return ((this.foreground === other.foreground) &&
(this.underline === other.underline) &&
(this.italics === other.italics) &&
(this.background === other.background) &&
(this.flash === other.flash));
}
copy (newPenState) {
this.foreground = newPenState.foreground;
this.underline = newPenState.underline;
this.italics = newPenState.italics;
this.background = newPenState.background;
this.flash = newPenState.flash;
}
toString () {
return ('color=' + this.foreground + ', underline=' + this.underline + ', italics=' + this.italics +
', background=' + this.background + ', flash=' + this.flash);
}
}
/**
* Unicode character with styling and background.
* @constructor
*/
class StyledUnicodeChar {
constructor (uchar, foreground, underline, italics, background, flash) {
this.uchar = uchar || ' '; // unicode character
this.penState = new PenState(foreground, underline, italics, background, flash);
}
reset () {
this.uchar = ' ';
this.penState.reset();
}
setChar (uchar, newPenState) {
this.uchar = uchar;
this.penState.copy(newPenState);
}
setPenState (newPenState) {
this.penState.copy(newPenState);
}
equals (other) {
return this.uchar === other.uchar && this.penState.equals(other.penState);
}
copy (newChar) {
this.uchar = newChar.uchar;
this.penState.copy(newChar.penState);
}
isEmpty () {
return this.uchar === ' ' && this.penState.isDefault();
}
}
/**
* CEA-608 row consisting of NR_COLS instances of StyledUnicodeChar.
* @constructor
*/
class Row {
constructor () {
this.chars = [];
for (let i = 0; i < NR_COLS; i++)
this.chars.push(new StyledUnicodeChar());
this.pos = 0;
this.currPenState = new PenState();
}
equals (other) {
let equal = true;
for (let i = 0; i < NR_COLS; i++) {
if (!this.chars[i].equals(other.chars[i])) {
equal = false;
break;
}
}
return equal;
}
copy (other) {
for (let i = 0; i < NR_COLS; i++)
this.chars[i].copy(other.chars[i]);
}
isEmpty () {
let empty = true;
for (let i = 0; i < NR_COLS; i++) {
if (!this.chars[i].isEmpty()) {
empty = false;
break;
}
}
return empty;
}
/**
* Set the cursor to a valid column.
*/
setCursor (absPos) {
if (this.pos !== absPos)
this.pos = absPos;
if (this.pos < 0) {
logger.log('ERROR', 'Negative cursor position ' + this.pos);
this.pos = 0;
} else if (this.pos > NR_COLS) {
logger.log('ERROR', 'Too large cursor position ' + this.pos);
this.pos = NR_COLS;
}
}
/**
* Move the cursor relative to current position.
*/
moveCursor (relPos) {
let newPos = this.pos + relPos;
if (relPos > 1) {
for (let i = this.pos + 1; i < newPos + 1; i++)
this.chars[i].setPenState(this.currPenState);
}
this.setCursor(newPos);
}
/**
* Backspace, move one step back and clear character.
*/
backSpace () {
this.moveCursor(-1);
this.chars[this.pos].setChar(' ', this.currPenState);
}
insertChar (byte) {
if (byte >= 0x90) { // Extended char
this.backSpace();
}
let char = getCharForByte(byte);
if (this.pos >= NR_COLS) {
logger.log('ERROR', 'Cannot insert ' + byte.toString(16) +
' (' + char + ') at position ' + this.pos + '. Skipping it!');
return;
}
this.chars[this.pos].setChar(char, this.currPenState);
this.moveCursor(1);
}
clearFromPos (startPos) {
let i;
for (i = startPos; i < NR_COLS; i++)
this.chars[i].reset();
}
clear () {
this.clearFromPos(0);
this.pos = 0;
this.currPenState.reset();
}
clearToEndOfRow () {
this.clearFromPos(this.pos);
}
getTextString () {
let chars = [];
let empty = true;
for (let i = 0; i < NR_COLS; i++) {
let char = this.chars[i].uchar;
if (char !== ' ')
empty = false;
chars.push(char);
}
if (empty)
return '';
else
return chars.join('');
}
setPenStyles (styles) {
this.currPenState.setStyles(styles);
let currChar = this.chars[this.pos];
currChar.setPenState(this.currPenState);
}
}
/**
* Keep a CEA-608 screen of 32x15 styled characters
* @constructor
*/
class CaptionScreen {
constructor () {
this.rows = [];
for (let i = 0; i < NR_ROWS; i++)
this.rows.push(new Row()); // Note that we use zero-based numbering (0-14)
this.currRow = NR_ROWS - 1;
this.nrRollUpRows = null;
this.reset();
}
reset () {
for (let i = 0; i < NR_ROWS; i++)
this.rows[i].clear();
this.currRow = NR_ROWS - 1;
}
equals (other) {
let equal = true;
for (let i = 0; i < NR_ROWS; i++) {
if (!this.rows[i].equals(other.rows[i])) {
equal = false;
break;
}
}
return equal;
}
copy (other) {
for (let i = 0; i < NR_ROWS; i++)
this.rows[i].copy(other.rows[i]);
}
isEmpty () {
let empty = true;
for (let i = 0; i < NR_ROWS; i++) {
if (!this.rows[i].isEmpty()) {
empty = false;
break;
}
}
return empty;
}
backSpace () {
let row = this.rows[this.currRow];
row.backSpace();
}
clearToEndOfRow () {
let row = this.rows[this.currRow];
row.clearToEndOfRow();
}
/**
* Insert a character (without styling) in the current row.
*/
insertChar (char) {
let row = this.rows[this.currRow];
row.insertChar(char);
}
setPen (styles) {
let row = this.rows[this.currRow];
row.setPenStyles(styles);
}
moveCursor (relPos) {
let row = this.rows[this.currRow];
row.moveCursor(relPos);
}
setCursor (absPos) {
logger.log('INFO', 'setCursor: ' + absPos);
let row = this.rows[this.currRow];
row.setCursor(absPos);
}
setPAC (pacData) {
logger.log('INFO', 'pacData = ' + JSON.stringify(pacData));
let newRow = pacData.row - 1;
if (this.nrRollUpRows && newRow < this.nrRollUpRows - 1)
newRow = this.nrRollUpRows - 1;
// Make sure this only affects Roll-up Captions by checking this.nrRollUpRows
if (this.nrRollUpRows && this.currRow !== newRow) {
// clear all rows first
for (let i = 0; i < NR_ROWS; i++)
this.rows[i].clear();
// Copy this.nrRollUpRows rows from lastOutputScreen and place it in the newRow location
// topRowIndex - the start of rows to copy (inclusive index)
let topRowIndex = this.currRow + 1 - (this.nrRollUpRows);
// We only copy if the last position was already shown.
// We use the cueStartTime value to check this.
const lastOutputScreen = this.lastOutputScreen;
if (lastOutputScreen) {
let prevLineTime = lastOutputScreen.rows[topRowIndex].cueStartTime;
if (prevLineTime && prevLineTime < logger.time) {
for (let i = 0; i < this.nrRollUpRows; i++)
this.rows[newRow - this.nrRollUpRows + i + 1].copy(lastOutputScreen.rows[topRowIndex + i]);
}
}
}
this.currRow = newRow;
let row = this.rows[this.currRow];
if (pacData.indent !== null) {
let indent = pacData.indent;
let prevPos = Math.max(indent - 1, 0);
row.setCursor(pacData.indent);
pacData.color = row.chars[prevPos].penState.foreground;
}
let styles = { foreground: pacData.color, underline: pacData.underline, italics: pacData.italics, background: 'black', flash: false };
this.setPen(styles);
}
/**
* Set background/extra foreground, but first do back_space, and then insert space (backwards compatibility).
*/
setBkgData (bkgData) {
logger.log('INFO', 'bkgData = ' + JSON.stringify(bkgData));
this.backSpace();
this.setPen(bkgData);
this.insertChar(0x20); // Space
}
setRollUpRows (nrRows) {
this.nrRollUpRows = nrRows;
}
rollUp () {
if (this.nrRollUpRows === null) {
logger.log('DEBUG', 'roll_up but nrRollUpRows not set yet');
return; // Not properly setup
}
logger.log('TEXT', this.getDisplayText());
let topRowIndex = this.currRow + 1 - this.nrRollUpRows;
let topRow = this.rows.splice(topRowIndex, 1)[0];
topRow.clear();
this.rows.splice(this.currRow, 0, topRow);
logger.log('INFO', 'Rolling up');
// logger.log('TEXT', this.get_display_text())
}
/**
* Get all non-empty rows with as unicode text.
*/
getDisplayText (asOneRow) {
asOneRow = asOneRow || false;
let displayText = [];
let text = '';
let rowNr = -1;
for (let i = 0; i < NR_ROWS; i++) {
let rowText = this.rows[i].getTextString();
if (rowText) {
rowNr = i + 1;
if (asOneRow)
displayText.push('Row ' + rowNr + ': \'' + rowText + '\'');
else
displayText.push(rowText.trim());
}
}
if (displayText.length > 0) {
if (asOneRow)
text = '[' + displayText.join(' | ') + ']';
else
text = displayText.join('\n');
}
return text;
}
getTextAndFormat () {
return this.rows;
}
}
// var modes = ['MODE_ROLL-UP', 'MODE_POP-ON', 'MODE_PAINT-ON', 'MODE_TEXT'];
class Cea608Channel {
constructor (channelNumber, outputFilter) {
this.chNr = channelNumber;
this.outputFilter = outputFilter;
this.mode = null;
this.verbose = 0;
this.displayedMemory = new CaptionScreen();
this.nonDisplayedMemory = new CaptionScreen();
this.lastOutputScreen = new CaptionScreen();
this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
this.writeScreen = this.displayedMemory;
this.mode = null;
this.cueStartTime = null; // Keeps track of where a cue started.
}
reset () {
this.mode = null;
this.displayedMemory.reset();
this.nonDisplayedMemory.reset();
this.lastOutputScreen.reset();
this.currRollUpRow = this.displayedMemory.rows[NR_ROWS - 1];
this.writeScreen = this.displayedMemory;
this.mode = null;
this.cueStartTime = null;
this.lastCueEndTime = null;
}
getHandler () {
return this.outputFilter;
}
setHandler (newHandler) {
this.outputFilter = newHandler;
}
setPAC (pacData) {
this.writeScreen.setPAC(pacData);
}
setBkgData (bkgData) {
this.writeScreen.setBkgData(bkgData);
}
setMode (newMode) {
if (newMode === this.mode)
return;
this.mode = newMode;
logger.log('INFO', 'MODE=' + newMode);
if (this.mode === 'MODE_POP-ON') {
this.writeScreen = this.nonDisplayedMemory;
} else {
this.writeScreen = this.displayedMemory;
this.writeScreen.reset();
}
if (this.mode !== 'MODE_ROLL-UP') {
this.displayedMemory.nrRollUpRows = null;
this.nonDisplayedMemory.nrRollUpRows = null;
}
this.mode = newMode;
}
insertChars (chars) {
for (let i = 0; i < chars.length; i++)
this.writeScreen.insertChar(chars[i]);
let screen = this.writeScreen === this.displayedMemory ? 'DISP' : 'NON_DISP';
logger.log('INFO', screen + ': ' + this.writeScreen.getDisplayText(true));
if (this.mode === 'MODE_PAINT-ON' || this.mode === 'MODE_ROLL-UP') {
logger.log('TEXT', 'DISPLAYED: ' + this.displayedMemory.getDisplayText(true));
this.outputDataUpdate();
}
}
ccRCL () { // Resume Caption Loading (switch mode to Pop On)
logger.log('INFO', 'RCL - Resume Caption Loading');
this.setMode('MODE_POP-ON');
}
ccBS () { // BackSpace
logger.log('INFO', 'BS - BackSpace');
if (this.mode === 'MODE_TEXT')
return;
this.writeScreen.backSpace();
if (this.writeScreen === this.displayedMemory)
this.outputDataUpdate();
}
ccAOF () { // Reserved (formerly Alarm Off)
}
ccAON () { // Reserved (formerly Alarm On)
}
ccDER () { // Delete to End of Row
logger.log('INFO', 'DER- Delete to End of Row');
this.writeScreen.clearToEndOfRow();
this.outputDataUpdate();
}
ccRU (nrRows) { // Roll-Up Captions-2,3,or 4 Rows
logger.log('INFO', 'RU(' + nrRows + ') - Roll Up');
this.writeScreen = this.displayedMemory;
this.setMode('MODE_ROLL-UP');
this.writeScreen.setRollUpRows(nrRows);
}
ccFON () { // Flash On
logger.log('INFO', 'FON - Flash On');
this.writeScreen.setPen({ flash: true });
}
ccRDC () { // Resume Direct Captioning (switch mode to PaintOn)
logger.log('INFO', 'RDC - Resume Direct Captioning');
this.setMode('MODE_PAINT-ON');
}
ccTR () { // Text Restart in text mode (not supported, however)
logger.log('INFO', 'TR');
this.setMode('MODE_TEXT');
}
ccRTD () { // Resume Text Display in Text mode (not supported, however)
logger.log('INFO', 'RTD');
this.setMode('MODE_TEXT');
}
ccEDM () { // Erase Displayed Memory
logger.log('INFO', 'EDM - Erase Displayed Memory');
this.displayedMemory.reset();
this.outputDataUpdate(true);
}
ccCR () { // Carriage Return
logger.log('CR - Carriage Return');
this.writeScreen.rollUp();
this.outputDataUpdate(true);
}
ccENM () { // Erase Non-Displayed Memory
logger.log('INFO', 'ENM - Erase Non-displayed Memory');
this.nonDisplayedMemory.reset();
}
ccEOC () { // End of Caption (Flip Memories)
logger.log('INFO', 'EOC - End Of Caption');
if (this.mode === 'MODE_POP-ON') {
let tmp = this.displayedMemory;
this.displayedMemory = this.nonDisplayedMemory;
this.nonDisplayedMemory = tmp;
this.writeScreen = this.nonDisplayedMemory;
logger.log('TEXT', 'DISP: ' + this.displayedMemory.getDisplayText());
}
this.outputDataUpdate(true);
}
ccTO (nrCols) { // Tab Offset 1,2, or 3 columns
logger.log('INFO', 'TO(' + nrCols + ') - Tab Offset');
this.writeScreen.moveCursor(nrCols);
}
ccMIDROW (secondByte) { // Parse MIDROW command
let styles = { flash: false };
styles.underline = secondByte % 2 === 1;
styles.italics = secondByte >= 0x2e;
if (!styles.italics) {
let colorIndex = Math.floor(secondByte / 2) - 0x10;
let colors = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta'];
styles.foreground = colors[colorIndex];
} else {
styles.foreground = 'white';
}
logger.log('INFO', 'MIDROW: ' + JSON.stringify(styles));
this.writeScreen.setPen(styles);
}
outputDataUpdate (dispatch = false) {
let t = logger.time;
if (t === null)
return;
if (this.outputFilter) {
if (this.cueStartTime === null && !this.displayedMemory.isEmpty()) { // Start of a new cue
this.cueStartTime = t;
} else {
if (!this.displayedMemory.equals(this.lastOutputScreen)) {
if (this.outputFilter.newCue) {
this.outputFilter.newCue(this.cueStartTime, t, this.lastOutputScreen);
if (dispatch === true && this.outputFilter.dispatchCue)
this.outputFilter.dispatchCue();
}
this.cueStartTime = this.displayedMemory.isEmpty() ? null : t;
}
}
this.lastOutputScreen.copy(this.displayedMemory);
}
}
cueSplitAtTime (t) {
if (this.outputFilter) {
if (!this.displayedMemory.isEmpty()) {
if (this.outputFilter.newCue)
this.outputFilter.newCue(this.cueStartTime, t, this.displayedMemory);
this.cueStartTime = t;
}
}
}
}
class Cea608Parser {
constructor (field, out1, out2) {
this.field = field || 1;
this.outputs = [out1, out2];
this.channels = [new Cea608Channel(1, out1), new Cea608Channel(2, out2)];
this.currChNr = -1; // Will be 1 or 2
this.lastCmdA = null; // First byte of last command
this.lastCmdB = null; // Second byte of last command
this.bufferedData = [];
this.startTime = null;
this.lastTime = null;
this.dataCounters = { 'padding': 0, 'char': 0, 'cmd': 0, 'other': 0 };
}
getHandler (index) {
return this.channels[index].getHandler();
}
setHandler (index, newHandler) {
this.channels[index].setHandler(newHandler);
}
/**
* Add data for time t in forms of list of bytes (unsigned ints). The bytes are treated as pairs.
*/
addData (t, byteList) {
let cmdFound, a, b,
charsFound = false;
this.lastTime = t;
logger.setTime(t);
for (let i = 0; i < byteList.length; i += 2) {
a = byteList[i] & 0x7f;
b = byteList[i + 1] & 0x7f;
if (a === 0 && b === 0) {
this.dataCounters.padding += 2;
continue;
} else {
logger.log('DATA', '[' + numArrayToHexArray([byteList[i], byteList[i + 1]]) + '] -> (' + numArrayToHexArray([a, b]) + ')');
}
cmdFound = this.parseCmd(a, b);
if (!cmdFound)
cmdFound = this.parseMidrow(a, b);
if (!cmdFound)
cmdFound = this.parsePAC(a, b);
if (!cmdFound)
cmdFound = this.parseBackgroundAttributes(a, b);
if (!cmdFound) {
charsFound = this.parseChars(a, b);
if (charsFound) {
if (this.currChNr && this.currChNr >= 0) {
let channel = this.channels[this.currChNr - 1];
channel.insertChars(charsFound);
} else {
logger.log('WARNING', 'No channel found yet. TEXT-MODE?');
}
}
}
if (cmdFound) {
this.dataCounters.cmd += 2;
} else if (charsFound) {
this.dataCounters.char += 2;
} else {
this.dataCounters.other += 2;
logger.log('WARNING', 'Couldn\'t parse cleaned data ' + numArrayToHexArray([a, b]) +
' orig: ' + numArrayToHexArray([byteList[i], byteList[i + 1]]));
}
}
}
/**
* Parse Command.
* @returns {Boolean} Tells if a command was found
*/
parseCmd (a, b) {
let chNr = null;
let cond1 = (a === 0x14 || a === 0x1C) && (b >= 0x20 && b <= 0x2F);
let cond2 = (a === 0x17 || a === 0x1F) && (b >= 0x21 && b <= 0x23);
if (!(cond1 || cond2))
return false;
if (a === this.lastCmdA && b === this.lastCmdB) {
this.lastCmdA = null;
this.lastCmdB = null; // Repeated commands are dropped (once)
logger.log('DEBUG', 'Repeated command (' + numArrayToHexArray([a, b]) + ') is dropped');
return true;
}
if (a === 0x14 || a === 0x17)
chNr = 1;
else
chNr = 2; // (a === 0x1C || a=== 0x1f)
let channel = this.channels[chNr - 1];
if (a === 0x14 || a === 0x1C) {
if (b === 0x20)
channel.ccRCL();
else if (b === 0x21)
channel.ccBS();
else if (b === 0x22)
channel.ccAOF();
else if (b === 0x23)
channel.ccAON();
else if (b === 0x24)
channel.ccDER();
else if (b === 0x25)
channel.ccRU(2);
else if (b === 0x26)
channel.ccRU(3);
else if (b === 0x27)
channel.ccRU(4);
else if (b === 0x28)
channel.ccFON();
else if (b === 0x29)
channel.ccRDC();
else if (b === 0x2A)
channel.ccTR();
else if (b === 0x2B)
channel.ccRTD();
else if (b === 0x2C)
channel.ccEDM();
else if (b === 0x2D)
channel.ccCR();
else if (b === 0x2E)
channel.ccENM();
else if (b === 0x2F)
channel.ccEOC();
} else { // a == 0x17 || a == 0x1F
channel.ccTO(b - 0x20);
}
this.lastCmdA = a;
this.lastCmdB = b;
this.currChNr = chNr;
return true;
}
/**
* Parse midrow styling command
* @returns {Boolean}
*/
parseMidrow (a, b) {
let chNr = null;
if (((a === 0x11) || (a === 0x19)) && b >= 0x20 && b <= 0x2f) {
if (a === 0x11)
chNr = 1;
else
chNr = 2;
if (chNr !== this.currChNr) {
logger.log('ERROR', 'Mismatch channel in midrow parsing');
return false;
}
let channel = this.channels[chNr - 1];
channel.ccMIDROW(b);
logger.log('DEBUG', 'MIDROW (' + numArrayToHexArray([a, b]) + ')');
return true;
}
return false;
}
/**
* Parse Preable Access Codes (Table 53).
* @returns {Boolean} Tells if PAC found
*/
parsePAC (a, b) {
let chNr = null;
let row = null;
let case1 = ((a >= 0x11 && a <= 0x17) || (a >= 0x19 && a <= 0x1F)) && (b >= 0x40 && b <= 0x7F);
let case2 = (a === 0x10 || a === 0x18) && (b >= 0x40 && b <= 0x5F);
if (!(case1 || case2))
return false;
if (a === this.lastCmdA && b === this.lastCmdB) {
this.lastCmdA = null;
this.lastCmdB = null;
return true; // Repeated commands are dropped (once)
}
chNr = (a <= 0x17) ? 1 : 2;
if (b >= 0x40 && b <= 0x5F) {
row = (chNr === 1) ? rowsLowCh1[a] : rowsLowCh2[a];
} else { // 0x60 <= b <= 0x7F
row = (chNr === 1) ? rowsHighCh1[a] : rowsHighCh2[a];
}
let pacData = this.interpretPAC(row, b);
let channel = this.channels[chNr - 1];
channel.setPAC(pacData);
this.lastCmdA = a;
this.lastCmdB = b;
this.currChNr = chNr;
return true;
}
/**
* Interpret the second byte of the pac, and return the information.
* @returns {Object} pacData with style parameters.
*/
interpretPAC (row, byte) {
let pacIndex = byte;
let pacData = { color: null, italics: false, indent: null, underline: false, row: row };
if (byte > 0x5F)
pacIndex = byte - 0x60;
else
pacIndex = byte - 0x40;
pacData.underline = (pacIndex & 1) === 1;
if (pacIndex <= 0xd) {
pacData.color = ['white', 'green', 'blue', 'cyan', 'red', 'yellow', 'magenta', 'white'][Math.floor(pacIndex / 2)];
} else if (pacIndex <= 0xf) {
pacData.italics = true;
pacData.color = 'white';
} else {
pacData.indent = (Math.floor((pacIndex - 0x10) / 2)) * 4;
}
return pacData; // Note that row has zero offset. The spec uses 1.
}
/**
* Parse characters.
* @returns An array with 1 to 2 codes corresponding to chars, if found. null otherwise.
*/
parseChars (a, b) {
let channelNr = null,
charCodes = null,
charCode1 = null;
if (a >= 0x19) {
channelNr = 2;
charCode1 = a - 8;
} else {
channelNr = 1;
charCode1 = a;
}
if (charCode1 >= 0x11 && charCode1 <= 0x13) {
// Special character
let oneCode = b;
if (charCode1 === 0x11)
oneCode = b + 0x50;
else if (charCode1 === 0x12)
oneCode = b + 0x70;
else
oneCode = b + 0x90;
logger.log('INFO', 'Special char \'' + getCharForByte(oneCode) + '\' in channel ' + channelNr);
charCodes = [oneCode];
} else if (a >= 0x20 && a <= 0x7f) {
charCodes = (b === 0) ? [a] : [a, b];
}
if (charCodes) {
let hexCodes = numArrayToHexArray(charCodes);
logger.log('DEBUG', 'Char codes = ' + hexCodes.join(','));
this.lastCmdA = null;
this.lastCmdB = null;
}
return charCodes;
}
/**
* Parse extended background attributes as well as new foreground color black.
* @returns{Boolean} Tells if background attributes are found
*/
parseBackgroundAttributes (a, b) {
let bkgData,
index,
chNr,
channel;
let case1 = (a === 0x10 || a === 0x18) && (b >= 0x20 && b <= 0x2f);
let case2 = (a === 0x17 || a === 0x1f) && (b >= 0x2d && b <= 0x2f);
if (!(case1 || case2))
return false;
bkgData = {};
if (a === 0x10 || a === 0x18) {
index = Math.floor((b - 0x20) / 2);
bkgData.background = backgroundColors[index];
if (b % 2 === 1)
bkgData.background = bkgData.background + '_semi';
} else if (b === 0x2d) {
bkgData.background = 'transparent';
} else {
bkgData.foreground = 'black';
if (b === 0x2f)
bkgData.underline = true;
}
chNr = (a < 0x18) ? 1 : 2;
channel = this.channels[chNr - 1];
channel.setBkgData(bkgData);
this.lastCmdA = null;
this.lastCmdB = null;
return true;
}
/**
* Reset state of parser and its channels.
*/
reset () {
for (let i = 0; i < this.channels.length; i++) {
Eif (this.channels[i])
this.channels[i].reset();
}
this.lastCmdA = null;
this.lastCmdB = null;
}
/**
* Trigger the generation of a cue, and the start of a new one if displayScreens are not empty.
*/
cueSplitAtTime (t) {
for (let i = 0; i < this.channels.length; i++) {
if (this.channels[i])
this.channels[i].cueSplitAtTime(t);
}
}
}
export default Cea608Parser;
|