@l5i/dashjs/build/es5/externals/cea608-parser.js

A reference client implementation for the playback of MPEG DASH via Javascript and compliant browsers.

/**
 * 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.
 */'use strict';(function(exports){"use strict"; /**
     *  Exceptions from regular ASCII. CodePoints are mapped to UTF-16 codes
     */var 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
}; /**
     * Get Unicode Character from CEA-608 byte code
     */var getCharForByte=function getCharForByte(byte){var charCode=byte;if(specialCea608CharsCodes.hasOwnProperty(byte)){charCode = specialCea608CharsCodes[byte];}return String.fromCharCode(charCode);};var NR_ROWS=15,NR_COLS=32; // Tables to look up row from PAC data
var rowsLowCh1={0x11:1,0x12:3,0x15:5,0x16:7,0x17:9,0x10:11,0x13:12,0x14:14};var rowsHighCh1={0x11:2,0x12:4,0x15:6,0x16:8,0x17:10,0x13:13,0x14:15};var rowsLowCh2={0x19:1,0x1A:3,0x1D:5,0x1E:7,0x1F:9,0x18:11,0x1B:12,0x1C:14};var rowsHighCh2={0x19:2,0x1A:4,0x1D:6,0x1E:8,0x1F:10,0x1B:13,0x1C:15};var 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.
     */var logger={verboseFilter:{'DATA':3,'DEBUG':3,'INFO':2,'WARNING':2,'TEXT':1,'ERROR':0},time:null,verboseLevel:0, // Only write errors
setTime:function setTime(newTime){this.time = newTime;},log:function log(severity,msg){var minLevel=this.verboseFilter[severity];if(this.verboseLevel >= minLevel){console.log(this.time + " [" + severity + "] " + msg);}}};var numArrayToHexArray=function numArrayToHexArray(numArray){var hexArray=[];for(var j=0;j < numArray.length;j++) {hexArray.push(numArray[j].toString(16));}return hexArray;}; /**
     * State of CEA-608 pen or character
     * @constructor
     */var PenState=function PenState(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;};PenState.prototype = {reset:function reset(){this.foreground = "white";this.underline = false;this.italics = false;this.background = "black";this.flash = false;},setStyles:function setStyles(styles){var attribs=["foreground","underline","italics","background","flash"];for(var i=0;i < attribs.length;i++) {var style=attribs[i];if(styles.hasOwnProperty(style)){this[style] = styles[style];}}},isDefault:function isDefault(){return this.foreground === "white" && !this.underline && !this.italics && this.background === "black" && !this.flash;},equals:function equals(other){return this.foreground === other.foreground && this.underline === other.underline && this.italics === other.italics && this.background === other.background && this.flash === other.flash;},copy:function copy(newPenState){this.foreground = newPenState.foreground;this.underline = newPenState.underline;this.italics = newPenState.italics;this.background = newPenState.background;this.flash = newPenState.flash;},toString:function toString(){return "color=" + this.foreground + ", underline=" + this.underline + ", italics=" + this.italics + ", background=" + this.background + ", flash=" + this.flash;}}; /**
     * Unicode character with styling and background.
     * @constructor
     */var StyledUnicodeChar=function StyledUnicodeChar(uchar,foreground,underline,italics,background,flash){this.uchar = uchar || ' '; // unicode character
this.penState = new PenState(foreground,underline,italics,background,flash);};StyledUnicodeChar.prototype = {reset:function reset(){this.uchar = ' ';this.penState.reset();},setChar:function setChar(uchar,newPenState){this.uchar = uchar;this.penState.copy(newPenState);},setPenState:function setPenState(newPenState){this.penState.copy(newPenState);},equals:function equals(other){return this.uchar === other.uchar && this.penState.equals(other.penState);},copy:function copy(newChar){this.uchar = newChar.uchar;this.penState.copy(newChar.penState);},isEmpty:function isEmpty(){return this.uchar === ' ' && this.penState.isDefault();}}; /**
     * CEA-608 row consisting of NR_COLS instances of StyledUnicodeChar.
     * @constructor
     */var Row=function Row(){this.chars = [];for(var i=0;i < NR_COLS;i++) {this.chars.push(new StyledUnicodeChar());}this.pos = 0;this.currPenState = new PenState();};Row.prototype = {equals:function equals(other){var equal=true;for(var i=0;i < NR_COLS;i++) {if(!this.chars[i].equals(other.chars[i])){equal = false;break;}}return equal;},copy:function copy(other){for(var i=0;i < NR_COLS;i++) {this.chars[i].copy(other.chars[i]);}},isEmpty:function isEmpty(){var empty=true;for(var i=0;i < NR_COLS;i++) {if(!this.chars[i].isEmpty()){empty = false;break;}}return empty;}, /**
         *  Set the cursor to a valid column.
         */setCursor:function 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:function moveCursor(relPos){var newPos=this.pos + relPos;if(relPos > 1){for(var 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:function backSpace(){this.moveCursor(-1);this.chars[this.pos].setChar(' ',this.currPenState);},insertChar:function insertChar(byte){if(byte >= 0x90){ //Extended char
this.backSpace();}var 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:function clearFromPos(startPos){var i;for(i = startPos;i < NR_COLS;i++) {this.chars[i].reset();}},clear:function clear(){this.clearFromPos(0);this.pos = 0;this.currPenState.reset();},clearToEndOfRow:function clearToEndOfRow(){this.clearFromPos(this.pos);},getTextString:function getTextString(){var chars=[];var empty=true;for(var i=0;i < NR_COLS;i++) {var char=this.chars[i].uchar;if(char !== " "){empty = false;}chars.push(char);}if(empty){return "";}else {return chars.join("");}},setPenStyles:function setPenStyles(styles){this.currPenState.setStyles(styles);var currChar=this.chars[this.pos];currChar.setPenState(this.currPenState);}}; /**
     * Keep a CEA-608 screen of 32x15 styled characters
     * @constructor
    */var CaptionScreen=function CaptionScreen(){this.rows = [];for(var 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();};CaptionScreen.prototype = {reset:function reset(){for(var i=0;i < NR_ROWS;i++) {this.rows[i].clear();}this.currRow = NR_ROWS - 1;},equals:function equals(other){var equal=true;for(var i=0;i < NR_ROWS;i++) {if(!this.rows[i].equals(other.rows[i])){equal = false;break;}}return equal;},copy:function copy(other){for(var i=0;i < NR_ROWS;i++) {this.rows[i].copy(other.rows[i]);}},isEmpty:function isEmpty(){var empty=true;for(var i=0;i < NR_ROWS;i++) {if(!this.rows[i].isEmpty()){empty = false;break;}}return empty;},backSpace:function backSpace(){var row=this.rows[this.currRow];row.backSpace();},clearToEndOfRow:function clearToEndOfRow(){var row=this.rows[this.currRow];row.clearToEndOfRow();}, /**
         * Insert a character (without styling) in the current row.
         */insertChar:function insertChar(char){var row=this.rows[this.currRow];row.insertChar(char);},setPen:function setPen(styles){var row=this.rows[this.currRow];row.setPenStyles(styles);},moveCursor:function moveCursor(relPos){var row=this.rows[this.currRow];row.moveCursor(relPos);},setCursor:function setCursor(absPos){logger.log("INFO","setCursor: " + absPos);var row=this.rows[this.currRow];row.setCursor(absPos);},setPAC:function setPAC(pacData){logger.log("INFO","pacData = " + JSON.stringify(pacData));var newRow=pacData.row - 1;if(this.nrRollUpRows && newRow < this.nrRollUpRows - 1){newRow = this.nrRollUpRows - 1;}this.currRow = newRow;var row=this.rows[this.currRow];if(pacData.indent !== null){var indent=pacData.indent;var prevPos=Math.max(indent - 1,0);row.setCursor(pacData.indent);pacData.color = row.chars[prevPos].penState.foreground;}var 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:function setBkgData(bkgData){logger.log("INFO","bkgData = " + JSON.stringify(bkgData));this.backSpace();this.setPen(bkgData);this.insertChar(0x20); //Space
},setRollUpRows:function setRollUpRows(nrRows){this.nrRollUpRows = nrRows;},rollUp:function rollUp(){if(this.nrRollUpRows === null){logger.log("DEBUG","roll_up but nrRollUpRows not set yet");return; //Not properly setup
}logger.log("TEXT",this.getDisplayText());var topRowIndex=this.currRow + 1 - this.nrRollUpRows;var 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:function getDisplayText(asOneRow){asOneRow = asOneRow || false;var displayText=[];var text="";var rowNr=-1;for(var i=0;i < NR_ROWS;i++) {var 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:function getTextAndFormat(){return this.rows;}}; /**
     * Handle a CEA-608 channel and send decoded data to outputFilter
     * @constructor
     * @param {Number} channelNumber (1 or 2)
     * @param {CueHandler} outputFilter Output from channel1 newCue(startTime, endTime, captionScreen)
    */var Cea608Channel=function Cea608Channel(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.
};Cea608Channel.prototype = {modes:["MODE_ROLL-UP","MODE_POP-ON","MODE_PAINT-ON","MODE_TEXT"],reset:function 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:function getHandler(){return this.outputFilter;},setHandler:function setHandler(newHandler){this.outputFilter = newHandler;},setPAC:function setPAC(pacData){this.writeScreen.setPAC(pacData);},setBkgData:function setBkgData(bkgData){this.writeScreen.setBkgData(bkgData);},setMode:function 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:function insertChars(chars){for(var i=0;i < chars.length;i++) {this.writeScreen.insertChar(chars[i]);}var 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();}},cc_RCL:function cc_RCL(){ // Resume Caption Loading (switch mode to Pop On)
logger.log("INFO","RCL - Resume Caption Loading");this.setMode("MODE_POP-ON");},cc_BS:function cc_BS(){ // BackSpace
logger.log("INFO","BS - BackSpace");if(this.mode === "MODE_TEXT"){return;}this.writeScreen.backSpace();if(this.writeScreen === this.displayedMemory){this.outputDataUpdate();}},cc_AOF:function cc_AOF(){ // Reserved (formerly Alarm Off)
return;},cc_AON:function cc_AON(){ // Reserved (formerly Alarm On)
return;},cc_DER:function cc_DER(){ // Delete to End of Row
logger.log("INFO","DER- Delete to End of Row");this.writeScreen.clearToEndOfRow();this.outputDataUpdate();},cc_RU:function cc_RU(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);},cc_FON:function cc_FON(){ //Flash On
logger.log("INFO","FON - Flash On");this.writeScreen.setPen({flash:true});},cc_RDC:function cc_RDC(){ // Resume Direct Captioning (switch mode to PaintOn)
logger.log("INFO","RDC - Resume Direct Captioning");this.setMode("MODE_PAINT-ON");},cc_TR:function cc_TR(){ // Text Restart in text mode (not supported, however)
logger.log("INFO","TR");this.setMode("MODE_TEXT");},cc_RTD:function cc_RTD(){ // Resume Text Display in Text mode (not supported, however)
logger.log("INFO","RTD");this.setMode("MODE_TEXT");},cc_EDM:function cc_EDM(){ // Erase Displayed Memory
logger.log("INFO","EDM - Erase Displayed Memory");this.displayedMemory.reset();this.outputDataUpdate();},cc_CR:function cc_CR(){ // Carriage Return
logger.log("CR - Carriage Return");this.writeScreen.rollUp();this.outputDataUpdate();},cc_ENM:function cc_ENM(){ //Erase Non-Displayed Memory
logger.log("INFO","ENM - Erase Non-displayed Memory");this.nonDisplayedMemory.reset();},cc_EOC:function cc_EOC(){ //End of Caption (Flip Memories)
logger.log("INFO","EOC - End Of Caption");if(this.mode === "MODE_POP-ON"){var tmp=this.displayedMemory;this.displayedMemory = this.nonDisplayedMemory;this.nonDisplayedMemory = tmp;this.writeScreen = this.nonDisplayedMemory;logger.log("TEXT","DISP: " + this.displayedMemory.getDisplayText());}this.outputDataUpdate();},cc_TO:function cc_TO(nrCols){ // Tab Offset 1,2, or 3 columns
logger.log("INFO","TO(" + nrCols + ") - Tab Offset");this.writeScreen.moveCursor(nrCols);},cc_MIDROW:function cc_MIDROW(secondByte){ // Parse MIDROW command
var styles={flash:false};styles.underline = secondByte % 2 === 1;styles.italics = secondByte >= 0x2e;if(!styles.italics){var colorIndex=Math.floor(secondByte / 2) - 0x10;var 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:function outputDataUpdate(){var t=logger.time;if(t === null){return;}if(this.outputFilter){if(this.outputFilter.updateData){this.outputFilter.updateData(t,this.displayedMemory);}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);}this.cueStartTime = this.displayedMemory.isEmpty()?null:t;}}this.lastOutputScreen.copy(this.displayedMemory);}},cueSplitAtTime:function cueSplitAtTime(t){if(this.outputFilter){if(!this.displayedMemory.isEmpty()){if(this.outputFilter.newCue){this.outputFilter.newCue(this.cueStartTime,t,this.displayedMemory);}this.cueStartTime = t;}}}}; /**
     * Parse CEA-608 data and send decoded data to out1 and out2.
     * @constructor
     * @param {Number} field  CEA-608 field (1 or 2)
     * @param {CueHandler} out1 Output from channel1 newCue(startTime, endTime, captionScreen)
     * @param {CueHandler} out2 Output from channel2 newCue(startTime, endTime, captionScreen)
     */var Cea608Parser=function Cea608Parser(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};};Cea608Parser.prototype = {getHandler:function getHandler(index){return this.channels[index].getHandler();},setHandler:function 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:function addData(t,byteList){var cmdFound,a,b,charsFound=false;this.lastTime = t;logger.setTime(t);for(var i=0;i < byteList.length;i += 2) {a = byteList[i] & 0x7f;b = byteList[i + 1] & 0x7f;if(a >= 0x10 && a <= 0x1f && a === this.lastCmdA && b === this.lastCmdB){this.lastCmdA = null;this.lastCmdB = null;logger.log("DEBUG","Repeated command (" + numArrayToHexArray([a,b]) + ") is dropped");continue; // Repeated commands are dropped (once)
}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){var 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:function parseCmd(a,b){var chNr=null;var cond1=(a === 0x14 || a === 0x15 || a === 0x1C || a === 0x1D) && 0x20 <= b && b <= 0x2F;var cond2=(a === 0x17 || a === 0x1F) && 0x21 <= b && b <= 0x23;if(!(cond1 || cond2)){return false;}if(a === 0x14 || a === 0x15 || a === 0x17){chNr = 1;}else {chNr = 2; // (a === 0x1C || a === 0x1D || a=== 0x1f)
}var channel=this.channels[chNr - 1];if(a === 0x14 || a === 0x15 || a === 0x1C || a === 0x1D){if(b === 0x20){channel.cc_RCL();}else if(b === 0x21){channel.cc_BS();}else if(b === 0x22){channel.cc_AOF();}else if(b === 0x23){channel.cc_AON();}else if(b === 0x24){channel.cc_DER();}else if(b === 0x25){channel.cc_RU(2);}else if(b === 0x26){channel.cc_RU(3);}else if(b === 0x27){channel.cc_RU(4);}else if(b === 0x28){channel.cc_FON();}else if(b === 0x29){channel.cc_RDC();}else if(b === 0x2A){channel.cc_TR();}else if(b === 0x2B){channel.cc_RTD();}else if(b === 0x2C){channel.cc_EDM();}else if(b === 0x2D){channel.cc_CR();}else if(b === 0x2E){channel.cc_ENM();}else if(b === 0x2F){channel.cc_EOC();}}else { //a == 0x17 || a == 0x1F
channel.cc_TO(b - 0x20);}this.lastCmdA = a;this.lastCmdB = b;this.currChNr = chNr;return true;}, /**
         * Parse midrow styling command
         * @returns {Boolean}
         */parseMidrow:function parseMidrow(a,b){var chNr=null;if((a === 0x11 || a === 0x19) && 0x20 <= b && b <= 0x2f){if(a === 0x11){chNr = 1;}else {chNr = 2;}if(chNr !== this.currChNr){logger.log("ERROR","Mismatch channel in midrow parsing");return false;}var channel=this.channels[chNr - 1]; // cea608 spec says midrow codes should inject a space
channel.insertChars([0x20]);channel.cc_MIDROW(b);logger.log("DEBUG","MIDROW (" + numArrayToHexArray([a,b]) + ")");this.lastCmdA = a;this.lastCmdB = b;return true;}return false;}, /**
         * Parse Preable Access Codes (Table 53).
         * @returns {Boolean} Tells if PAC found
         */parsePAC:function parsePAC(a,b){var chNr=null;var row=null;var case1=(0x11 <= a && a <= 0x17 || 0x19 <= a && a <= 0x1F) && 0x40 <= b && b <= 0x7F;var case2=(a === 0x10 || a === 0x18) && 0x40 <= b && b <= 0x5F;if(!(case1 || case2)){return false;}chNr = a <= 0x17?1:2;if(0x40 <= b && b <= 0x5F){row = chNr === 1?rowsLowCh1[a]:rowsLowCh2[a];}else { // 0x60 <= b <= 0x7F
row = chNr === 1?rowsHighCh1[a]:rowsHighCh2[a];}var pacData=this.interpretPAC(row,b);var 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:function interpretPAC(row,byte){var pacIndex=byte;var 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:function parseChars(a,b){var channelNr=null,charCodes=null,charCode1=null,charCode2=null;if(a >= 0x19){channelNr = 2;charCode1 = a - 8;}else {channelNr = 1;charCode1 = a;}if(0x11 <= charCode1 && charCode1 <= 0x13){ // Special character
var 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];this.lastCmdA = a;this.lastCmdB = b;}else if(0x20 <= a && a <= 0x7f){charCodes = b === 0?[a]:[a,b];this.lastCmdA = null;this.lastCmdB = null;}if(charCodes){var hexCodes=numArrayToHexArray(charCodes);logger.log("DEBUG","Char codes =  " + hexCodes.join(","));}return charCodes;}, /**
        * Parse extended background attributes as well as new foreground color black.
        * @returns{Boolean} Tells if background attributes are found
        */parseBackgroundAttributes:function parseBackgroundAttributes(a,b){var bkgData,index,chNr,channel;var case1=(a === 0x10 || a === 0x18) && 0x20 <= b && b <= 0x2f;var case2=(a === 0x17 || a === 0x1f) && 0x2d <= b && 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 = a;this.lastCmdB = b;return true;}, /**
         * Reset state of parser and its channels.
         */reset:function reset(){for(var i=0;i < this.channels.length;i++) {if(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:function cueSplitAtTime(t){for(var i=0;i < this.channels.length;i++) {if(this.channels[i]){this.channels[i].cueSplitAtTime(t);}}}}; /**
     * Find ranges corresponding to SEA CEA-608 NALUS in sizeprepended NALU array.
     * @param {raw} dataView of binary data
     * @param {startPos} start position in raw
     * @param {size} total size of data in raw to consider
     * @returns 
     */var findCea608Nalus=function findCea608Nalus(raw,startPos,size){var nalSize=0,cursor=startPos,nalType=0,cea608NaluRanges=[], // Check SEI data according to ANSI-SCTE 128
isCEA608SEI=function isCEA608SEI(payloadType,payloadSize,raw,pos){if(payloadType !== 4 || payloadSize < 8){return null;}var countryCode=raw.getUint8(pos);var providerCode=raw.getUint16(pos + 1);var userIdentifier=raw.getUint32(pos + 3);var userDataTypeCode=raw.getUint8(pos + 7);return countryCode == 0xB5 && providerCode == 0x31 && userIdentifier == 0x47413934 && userDataTypeCode == 0x3;};while(cursor < startPos + size) {nalSize = raw.getUint32(cursor);nalType = raw.getUint8(cursor + 4) & 0x1F; //console.log(time + "  NAL " + nalType);
if(nalType === 6){ // SEI NAL Unit. The NAL header is the first byte
//console.log("SEI NALU of size " + nalSize + " at time " + time);
var pos=cursor + 5;var payloadType=-1;while(pos < cursor + 4 + nalSize - 1) { // The last byte should be rbsp_trailing_bits
payloadType = 0;var b=0xFF;while(b === 0xFF) {b = raw.getUint8(pos);payloadType += b;pos++;}var payloadSize=0;b = 0xFF;while(b === 0xFF) {b = raw.getUint8(pos);payloadSize += b;pos++;}if(isCEA608SEI(payloadType,payloadSize,raw,pos)){ //console.log("CEA608 SEI " + time + " " + payloadSize);
cea608NaluRanges.push([pos,payloadSize]);}pos += payloadSize;}}cursor += nalSize + 4;}return cea608NaluRanges;};var extractCea608DataFromRange=function extractCea608DataFromRange(raw,cea608Range){var pos=cea608Range[0];var fieldData=[[],[]];pos += 8; // Skip the identifier up to userDataTypeCode
var ccCount=raw.getUint8(pos) & 0x1f;pos += 2; // Advance 1 and skip reserved byte
for(var i=0;i < ccCount;i++) {var byte=raw.getUint8(pos);var ccValid=byte & 0x4;var ccType=byte & 0x3;pos++;var ccData1=raw.getUint8(pos); // Keep parity bit
pos++;var ccData2=raw.getUint8(pos); // Keep parity bit
pos++;if(ccValid && (ccData1 & 0x7f) + (ccData2 & 0x7f) !== 0){ //Check validity and non-empty data
if(ccType === 0){fieldData[0].push(ccData1);fieldData[0].push(ccData2);}else if(ccType === 1){fieldData[1].push(ccData1);fieldData[1].push(ccData2);}}}return fieldData;};exports.logger = logger;exports.PenState = PenState;exports.CaptionScreen = CaptionScreen;exports.Cea608Parser = Cea608Parser;exports.findCea608Nalus = findCea608Nalus;exports.extractCea608DataFromRange = extractCea608DataFromRange;})(typeof exports === 'undefined'?undefined.cea608parser = {}:exports);
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