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edid.js
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// From https://github.com/dgallegos/edidreader/blob/master/app/js/edid.js
/*
* The MIT License
*
* Copyright (c) 2012-2013 David Gallegos
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
function Edid () {
this.EDID_BLOCK_LENGTH = 128;
this.WhiteAndSyncLevels = ["+0.7/−0.3 V", "+0.714/−0.286 V",
"+1.0/−0.4 V", "+0.7/0 V"];
this.digitalColorSpace = ["RGB 4:4:4", "RGB 4:4:4 + YCrCb 4:4:4",
"RGB 4:4:4 + YCrCb 4:2:2",
"RGB 4:4:4 + YCrCb 4:4:4 + YCrCb 4:2:2"];
this.analogColorSpace = ["Monochrome or Grayscale",
"RGB color", "Non-RGB color", "Undefined"];
this.establishedTimingBitmaps = ["720×400 @ 70 Hz",
"720×400 @ 88 Hz",
"640×480 @ 60 Hz",
"640×480 @ 67 Hz",
"640×480 @ 72 Hz",
"640×480 @ 75 Hz",
"800×600 @ 56 Hz",
"800×600 @ 60 Hz",
"800×600 @ 72 Hz",
"800×600 @ 75 Hz",
"832×624 @ 75 Hz",
"1024×768i @ 87 Hz",
"1024×768 @ 60 Hz",
"1024×768 @ 72 Hz",
"1024×768 @ 75 Hz",
"1280×1024 @ 75 Hz",
"1152x870 @ 75 Hz"];
this.DTD_LENGTH = 18;
this.xyPixelRatioEnum = [{"string":"16:10"},
{"string":"4:3"},
{"string":"5:4"},
{"string":"16:9"}];
this.syncTypeEnum = {"ANALOG_COMPOSITE" : 0x00,
"BIPOLAR_ANALOG_COMPOSITE" : 0x01,
"DIGITAL_COMPOSITE" : 0x02,
"DIGITAL_SEPARATE" : 0x03};
this.dataBlockType = {
RESERVED : {string:"RESERVED",value:0},
AUDIO : {string:"AUDIO",value:1},
VIDEO : {string:"VIDEO",value:2},
VENDOR_SPECIFIC : {string:"VENDOR SPECIFIC",value:3},
SPEAKER_ALLOCATION : {string:"SPEAKER ALLOCATION",value:4}};
this.audioFormatArray = [1,8,13,14,15]
this.shortAudioDescriptors = ["RESERVED","LPCM","AC-3","MPEG-1","MP3","MPEG2","AAC LC",
"DTS","ATRAC","DSD","E-AC-3","DTS-HD","MLP","DST","WMA Pro"];
this.sadSampleRates = ["32 kHz", "44.1 kHz", "48 kHz", "88.2 kHz", "96 kHz", "176.4 kHz", "192 kHz"];
this.sadBitDepths = ["16 bit", "20 bit", "24 bit"];
this.shortVideoDescriptors = [{"vic":0},
{"vic":1, "format":"640x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"1:1"},
{"vic":2, "format":"720x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":3, "format":"720x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":4, "format":"1280x720p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":5, "format":"1920x1080i", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":6, "format":"720(1440)x480i", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":7, "format":"720(1440)x480i", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":8, "format":"720(1440)x240p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"4:9"},
{"vic":9, "format":"720(1440)x240p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"16:27"},
{"vic":10, "format":"2880x480i", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"2:9 – 20:9"},
{"vic":11, "format":"2880x480i", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"8:27 -80:27"},
{"vic":12, "format":"2880x240p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"1:9 – 10:9"},
{"vic":13, "format":"2880x240p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"4:27 – 40:27"},
{"vic":14, "format":"1440x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"4:9 or 8:9"},
{"vic":15, "format":"1440x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"16:27 or 32:27"},
{"vic":16, "format":"1920x1080p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":17, "format":"720x576p", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":18, "format":"720x576p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":19, "format":"1280x720p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":20, "format":"1920x1080i", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":21, "format":"720(1440)x576i", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":22, "format":"720(1440)x576i", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":23, "format":"720(1440)x288p", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:15"},
{"vic":24, "format":"720(1440)x288p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:45"},
{"vic":25, "format":"2880x576i", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"2:15 – 20:15"},
{"vic":26, "format":"2880x576i", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"16:45-160:45"},
{"vic":27, "format":"2880x288p", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"1:15 – 10:15"},
{"vic":28, "format":"2880x288p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"8:45 – 80:45"},
{"vic":29, "format":"1440x576p", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:15 or 16:15"},
{"vic":30, "format":"1440x576p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:45 or 64:45"},
{"vic":31, "format":"1920x1080p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":32, "format":"1920x1080p", "fieldRate":"23.97Hz/24Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":33, "format":"1920x1080p", "fieldRate":"25Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":34, "format":"1920x1080p", "fieldRate":"29.97Hz/30Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":35, "format":"2880x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"2:9, 4:9, or 8:9"},
{"vic":36, "format":"2880x480p", "fieldRate":"59.94Hz/60Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"8:27, 16:27, or 32:27"},
{"vic":37, "format":"2880x576p", "fieldRate":"50Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"4:15, 8:15, or 16:15"},
{"vic":38, "format":"2880x576p", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"16:45, 32:45, or 64:45"},
{"vic":39, "format":"1920x1080i (1250 total)", "fieldRate":"50Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":40, "format":"1920x1080i", "fieldRate":"100Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":41, "format":"1280x720p", "fieldRate":"100Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":42, "format":"720x576p", "fieldRate":"100Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":43, "format":"720x576p", "fieldRate":"100Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":44, "format":"720(1440)x576i", "fieldRate":"100Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":45, "format":"720(1440)x576i", "fieldRate":"100Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":46, "format":"1920x1080i", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":47, "format":"1280x720p", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":48, "format":"720x480p", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":49, "format":"720x480p", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":50, "format":"720(1440)x480i", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":51, "format":"720(1440)x480i", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":52, "format":"720x576p", "fieldRate":"200Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":53, "format":"720x576p", "fieldRate":"200Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":54, "format":"720(1440)x576i", "fieldRate":"200Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"16:15"},
{"vic":55, "format":"720(1440)x576i", "fieldRate":"200Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"64:45"},
{"vic":56, "format":"720x480p", "fieldRate":"239.76/240Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":57, "format":"720x480p", "fieldRate":"239.76/240Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":58, "format":"720(1440)x480i", "fieldRate":"239.76/240Hz", "pictureAspectRatio":"4:3", "pixelAspectRatio":"8:9"},
{"vic":59, "format":"720(1440)x480i", "fieldRate":"239.76/240Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"32:27"},
{"vic":60, "format":"1280x720p", "fieldRate":"23.97Hz/24Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":61, "format":"1280x720p", "fieldRate":"25Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":62, "format":"1280x720p", "fieldRate":"29.97Hz/30Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":63, "format":"1920x1080p", "fieldRate":"119.88/120Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"},
{"vic":64, "format":"1920x1080p", "fieldRate":"100Hz", "pictureAspectRatio":"16:9", "pixelAspectRatio":"1:1"}]
this.speakerAllocation = ["Front Left/Front Right (FL/FR)", "Low Frequency Effort (LFE)",
"Front Center (FC)", "Rear Left/Rear Right (RL/RR)",
"Rear Center (RC)", "Front Left Center/Front Right Center (FLC/FRC)",
"Rear Left Center/Rear Right Center (RLC/RRC)",
"Front Left Wide/Front Right Wide (FLW/FRW)",
"Front Left High/Frong Right High (FLH/FRH)",
"Top Center (TC)", "Front Center High (FCH)"];
}
Edid.prototype.setEdidData = function(edid)
{
this.edidData = edid;
}
Edid.prototype.parse = function()
{
if(this.validateHeader() == true)
{
this.validHeader = "OK";
}
else
{
this.validHeader = "ERROR";
}
this.eisaId = this.getEisaId();
this.productCode = this.getProductCode();
this.serialNumber = this.getSerialNumber();
this.manufactureDate = this.getManufactureWeek()+"/"+
this.getManufactureYear();
this.edidVersion = this.getEdidVersion()+"."+
this.getEdidRevision();
this.bdp = this.getBasicDisplayParams();
this.chromaticity = this.getChromaticityCoordinates();
this.timingBitmap = this.getTimingBitmap();
this.standardDisplayModes = this.getStandardDisplayModes();
this.dtds = this.getDtds();
this.numberOfExtensions = this.getNumberExtensions();
this.checksum = this.getChecksum();
this.exts = new Array();
// Begin Parsing Extension blocks
for(var extIndex = 0; extIndex < this.numberOfExtensions; extIndex++)
{
this.exts[extIndex] = new Object();
this.exts[extIndex].extTag = this.getExtTag(extIndex);
this.exts[extIndex].revisionNumber = this.getRevisionNumber(extIndex);
this.exts[extIndex].dtdStart = this.getDtdStart(extIndex);
this.exts[extIndex].numDtds = this.getNumberExtDtds(extIndex);
this.exts[extIndex].underscan = this.getUnderscan(extIndex);
this.exts[extIndex].basicAudio = this.getBasicAudio(extIndex);
this.exts[extIndex].ycbcr444 = this.getYcBcR444(extIndex);
this.exts[extIndex].ycbcr422 = this.getYcBcR422(extIndex);
// If DTDs don't start at byte 4
if(this.exts[extIndex].dtdStart != 4)
{
// Parse Data Collection block
this.exts[extIndex].dataBlockCollection = this.parseDataBlockCollection(extIndex);
}
// Parse DTDs
this.exts[extIndex].dtds = this.getExtDtds(extIndex,this.exts[extIndex].dtdStart);
// Get Checkum
this.exts[extIndex].checksum = this.getExtChecksum(extIndex);
}
}
Edid.prototype.validateHeader = function()
{
var validHeader = new Boolean();
if ((this.edidData[0] == 0x00) &&
(this.edidData[1] == 0xFF) &&
(this.edidData[2] == 0xFF) &&
(this.edidData[3] == 0xFF) &&
(this.edidData[4] == 0xFF) &&
(this.edidData[5] == 0xFF) &&
(this.edidData[6] == 0xFF) &&
(this.edidData[7] == 0x00))
{
validHeader = true;
}
else
{
validHeader = false;
}
return validHeader;
}
Edid.prototype.getEisaId = function()
{
var FIVE_BIT_LETTER_MASK = 0x1F;
var EISA_ID_BYTE1 = 8;
var EISA_ID_BYTE2 = 9;
var EISA_LETTER1_OFF = 2
var EISA_LETTER2_OFF = 5;
var LETTER2_TOP_BYTES = 3;
var LETTER2_TOP_MASK = 0x03;
var LETTER2_BOT_MASK = 0x07;
var firstLetter = (this.edidData[EISA_ID_BYTE1] >> EISA_LETTER1_OFF) &
FIVE_BIT_LETTER_MASK;
// Get the first two bits [2:0] of the top byte
var secondLetterTop = this.edidData[EISA_ID_BYTE1] & LETTER2_TOP_MASK;
// Get the last three bits [7:5] of the bottom byte
var secondLetterBottom = (this.edidData[EISA_ID_BYTE2] >> EISA_LETTER2_OFF) &
LETTER2_BOT_MASK;
// Combine the top and bottom
var secondLetter = (secondLetterTop << LETTER2_TOP_BYTES) | secondLetterBottom;
var thirdLetter = this.edidData[EISA_ID_BYTE2] & FIVE_BIT_LETTER_MASK;
return intToAscii(firstLetter)+intToAscii(secondLetter)+intToAscii(thirdLetter);
}
function intToAscii(intCode)
{
var abc = "0ABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");
return abc[intCode];
}
Edid.prototype.getProductCode = function()
{
var PRODUCT_CODE1 = 10;
var PRODUCT_CODE2 = 11;
return this.edidData[PRODUCT_CODE1] << 8 |
this.edidData[PRODUCT_CODE2];
}
Edid.prototype.getSerialNumber = function()
{
var SERIAL_NUMBER1 = 12;
var SERIAL_NUMBER2 = 13;
var SERIAL_NUMBER3 = 14;
var SERIAL_NUMBER4 = 15;
return this.edidData[SERIAL_NUMBER4] << 24 |
this.edidData[SERIAL_NUMBER3] << 16 |
this.edidData[SERIAL_NUMBER2] << 8 |
this.edidData[SERIAL_NUMBER1];
}
Edid.prototype.getManufactureWeek = function()
{
var MANUFACTURE_WEEK = 16;
return this.edidData[MANUFACTURE_WEEK];
}
Edid.prototype.getManufactureYear = function()
{
var MANUFACTURE_YEAR = 17;
return this.edidData[MANUFACTURE_YEAR] + 1990;
}
Edid.prototype.getEdidVersion = function()
{
var EDID_VERSION = 18;
return this.edidData[EDID_VERSION];
}
Edid.prototype.getEdidRevision = function()
{
var EDID_REVISION = 19;
return this.edidData[EDID_REVISION];
}
Edid.prototype.getBasicDisplayParams = function()
{
var bdp = new Object();
var VIDEO_IN_PARAMS_BITMAP = 20;
var DIGITAL_INPUT = 0x80;
if(this.edidData[VIDEO_IN_PARAMS_BITMAP] & DIGITAL_INPUT)
{
var VESA_DFP_COMPATIBLE = 0x01;
bdp.digitalInput = true;
if(this.edidData[VIDEO_IN_PARAMS_BITMAP] & VESA_DFP_COMPATIBLE)
{
bdp.vesaDfpCompatible = true;
}
else
{
bdp.vesaDfpCompatible = false;
}
}
else
{
bdp.digitalInput = false;
var WHITE_SYNC_LVLS_OFF = 5;
var WHITE_SYNC_LVLS_MASK = 0x03
bdp.whiteSyncLevels = (this.edidData[VIDEO_IN_PARAMS_BITMAP] >>
WHITE_SYNC_LVLS_OFF) & WHITE_SYNC_LVLS_MASK;
var BLANK_TO_BLACK_OFF = 4;
var BLANK_TO_BLACK_MASK = 0x01;
bdp.blankToBlack = ((this.edidData[VIDEO_IN_PARAMS_BITMAP] >>
BLANK_TO_BLACK_OFF) & BLANK_TO_BLACK_MASK) ?
true : false;
var SEPARATE_SYNC_OFF = 3;
var SEPARATE_SYNC_MASK = 0x01;
bdp.separateSyncSupported = ((this.edidData[VIDEO_IN_PARAMS_BITMAP] >>
SEPARATE_SYNC_OFF) & SEPARATE_SYNC_MASK) ?
true : false;
var COMPOSITE_SYNC_OFF = 2;
var COMPOSITE_SYNC_MASK = 0x01;
bdp.compositeSyncSupported = ((this.edidData[VIDEO_IN_PARAMS_BITMAP] >>
COMPOSITE_SYNC_OFF) & COMPOSITE_SYNC_MASK) ?
true : false;
var SYNC_ON_GREEN_OFF = 1;
var SYNC_ON_GREEN_MASK = 0x01;
bdp.synOnGreen = ((this.edidData[VIDEO_IN_PARAMS_BITMAP] >>
SYNC_ON_GREEN_OFF) & SYNC_ON_GREEN_MASK) ?
true : false;
var VSYNC_SERRATED_MASK = 0x01;
bdp.vsyncSerrated = (this.edidData[VIDEO_IN_PARAMS_BITMAP] & VSYNC_SERRATED_MASK) ?
true : false;
}
var MAX_HOR_IMG_SIZE = 21;
bdp.maxHorImgSize = this.edidData[MAX_HOR_IMG_SIZE];
var MAX_VERT_IMG_SIZE = 22;
bdp.maxVertImgSize = this.edidData[MAX_VERT_IMG_SIZE];
var DISPLAY_GAMMA = 23;
bdp.displayGamma = (this.edidData[DISPLAY_GAMMA] * (2.54/255)) + 1;
var SUPPORTED_FEATURES_BITMAP = 24;
var DPMS_STANDBY = 0x80;
bdp.dpmsStandby = (this.edidData[SUPPORTED_FEATURES_BITMAP] & DPMS_STANDBY) ?
true : false;
var DPMS_SUSPEND = 0x40;
bdp.dpmsSuspend = (this.edidData[SUPPORTED_FEATURES_BITMAP] & DPMS_SUSPEND) ?
true : false;
var DPMS_ACTIVE_OFF = 0x20;
bdp.dpmsActiveOff = (this.edidData[SUPPORTED_FEATURES_BITMAP] & DPMS_ACTIVE_OFF) ?
true : false;
var DISPLAY_TYPE_OFF = 3;
var DISPLAY_TYPE_MASK = 0x03;
bdp.displayType = (this.edidData[SUPPORTED_FEATURES_BITMAP] >> DISPLAY_TYPE_OFF) &
DISPLAY_TYPE_MASK;
var STANDARD_SRGB = 0x04;
bdp.standardSRgb = (this.edidData[SUPPORTED_FEATURES_BITMAP] & STANDARD_SRGB) ?
true : false;
var PREFERRED_TIMING = 0x02;
bdp.preferredTiming = (this.edidData[SUPPORTED_FEATURES_BITMAP] & PREFERRED_TIMING) ?
true : false;
var GTF_SUPPORTED = 0x01;
bdp.gtfSupported = (this.edidData[SUPPORTED_FEATURES_BITMAP] & GTF_SUPPORTED) ?
true : false;
return bdp;
}
Edid.prototype.getChromaticityCoordinates = function()
{
var chromaticity = new Object();
var TWO_BIT_MASK = 0x03;
var TWO_BIT_OFF = 2;
var FOUR_BIT_OFF = 4;
var SIX_BIT_OFF = 6;
var RED_GREEN_LSB = 25;
var RED_X_MSB = 27;
chromaticity.redX = (this.edidData[RED_X_MSB] << TWO_BIT_OFF) |
((this.edidData[RED_GREEN_LSB] >> SIX_BIT_OFF) & TWO_BIT_MASK);
chromaticity.redXCoords = (chromaticity.redX / 1024);
var RED_Y_MSB = 28;
chromaticity.redY = (this.edidData[RED_Y_MSB] << TWO_BIT_OFF) |
((this.edidData[RED_GREEN_LSB] >> FOUR_BIT_OFF) & TWO_BIT_MASK);
chromaticity.redYCoords = (chromaticity.redY / 1024);
var GREEN_X_MSB = 29;
chromaticity.greenX = (this.edidData[GREEN_X_MSB] << TWO_BIT_OFF) |
((this.edidData[RED_GREEN_LSB] >> TWO_BIT_OFF) & TWO_BIT_MASK);
chromaticity.greenXCoords = (chromaticity.greenX / 1024);
var GREEN_Y_MSB = 30;
chromaticity.greenY = (this.edidData[GREEN_Y_MSB] << TWO_BIT_OFF) |
(this.edidData[RED_GREEN_LSB] & TWO_BIT_MASK);
chromaticity.greenYCoords = (chromaticity.greenY / 1024);
var BLUE_WHITE_LSB = 26;
var BLUE_X_MSB = 31;
chromaticity.blueX = (this.edidData[BLUE_X_MSB] << TWO_BIT_OFF) |
((this.edidData[BLUE_WHITE_LSB] >> SIX_BIT_OFF) & TWO_BIT_MASK);
chromaticity.blueXCoords = (chromaticity.blueX / 1024);
var BLUE_Y_MSB = 32;
chromaticity.blueY = (this.edidData[BLUE_Y_MSB] << TWO_BIT_OFF) |
((this.edidData[BLUE_WHITE_LSB] >> FOUR_BIT_OFF) & TWO_BIT_MASK);
chromaticity.blueYCoords = (chromaticity.blueY / 1024);
var WHITE_X_MSB = 33;
chromaticity.whiteX = (this.edidData[WHITE_X_MSB] << TWO_BIT_OFF) |
((this.edidData[BLUE_WHITE_LSB] >> TWO_BIT_OFF) & TWO_BIT_MASK);
chromaticity.whiteXCoords = (chromaticity.whiteX / 1024);
var WHITE_Y_MSB = 34;
chromaticity.whiteY = (this.edidData[WHITE_Y_MSB] << TWO_BIT_OFF) |
(this.edidData[BLUE_WHITE_LSB] & TWO_BIT_MASK);
chromaticity.whiteYCoords = (chromaticity.whiteY / 1024);
return chromaticity;
}
Edid.prototype.getTimingBitmap = function()
{
var TIMING_BITMAP1 = 35;
var TIMING_BITMAP2 = 36;
var TIMING_BITMAP3 = 37;
var timingBitmap = (this.edidData[TIMING_BITMAP1] << 16) |
(this.edidData[TIMING_BITMAP2] << 8) |
this.edidData[TIMING_BITMAP3];
return timingBitmap;
}
Edid.prototype.getStandardDisplayModes = function()
{
var STD_DISPLAY_MODES_START = 38;
var STD_DISPLAY_MODES_END = 53;
var stdDispModesArray = new Array();
var arrayCounter = 0;
var index = STD_DISPLAY_MODES_START;
while(index < STD_DISPLAY_MODES_END)
{
if((this.edidData[index] != 0x01) &&
(this.edidData[index+1] != 0x01))
{
var standardDisplayModes = new Object();
standardDisplayModes.xResolution = (this.edidData[index] + 31) * 8;
var XY_PIXEL_RATIO_OFF = 6;
var XY_PIXEL_RATIO_MASK = 0x03;
standardDisplayModes.xyPixelRatio = (this.edidData[index+1] >>
XY_PIXEL_RATIO_OFF) & XY_PIXEL_RATIO_MASK;
var VERTICAL_FREQUENCY_MASK = 0x3F;
standardDisplayModes.vertFreq = (this.edidData[index+1] &
VERTICAL_FREQUENCY_MASK) + 60;
stdDispModesArray[arrayCounter] = standardDisplayModes;
arrayCounter++;
}
index += 2;
}
return stdDispModesArray;
}
Edid.prototype.parseDtd = function(dtdIndex)
{
var dtd = new Object();
// Pixel Clock in MHz
dtd.pixelClock = ((this.edidData[dtdIndex+1] << 8) |
this.edidData[dtdIndex]) / 100;
var HOR_ACTIVE_OFF = 4;
var HOR_ACTIVE_PIX_MASK = 0x0F;
dtd.horActivePixels = (((this.edidData[dtdIndex+4] >> HOR_ACTIVE_OFF) & HOR_ACTIVE_PIX_MASK) << 8) |
this.edidData[dtdIndex+2];
var HOR_BLANK_MASK = 0x0F
dtd.horBlankPixels = (((this.edidData[dtdIndex+4])
& HOR_BLANK_MASK) << 8) | this.edidData[dtdIndex+3];
var VERT_ACTIVE_OFF = 4;
var VERT_ACTIVE_MASK = 0x0F;
dtd.vertActivePixels = (((this.edidData[dtdIndex+7] >> VERT_ACTIVE_OFF) &
VERT_ACTIVE_MASK) << 8) | this.edidData[dtdIndex+5];;
var VERT_BLANK_MASK = 0x0F;
dtd.vertBlankPixels = ((this.edidData[dtdIndex+7] & VERT_BLANK_MASK) << 8)
| this.edidData[dtdIndex+6];
var HOR_SYNC_OFF_OFF = 6;
var HOR_SYNC_OFF_MASK = 0x03;
dtd.horSyncOff = (((this.edidData[dtdIndex+11] >> HOR_SYNC_OFF_OFF)
& HOR_SYNC_OFF_MASK) << 8) | this.edidData[dtdIndex+8];
var HOR_SYNC_PULSE_OFF = 4;
var HOR_SYNC_PULSE_MASK = 0x03;
dtd.horSyncPulse = (((this.edidData[dtdIndex+11] >> HOR_SYNC_PULSE_OFF)
& HOR_SYNC_PULSE_MASK) << 8)| this.edidData[dtdIndex+9];
var VERT_SYNC_OFF_TOP_OFF = 2;
var VERT_SYNC_OFF_TOP_MASK = 0x03;
var VERT_SYNC_OFF_BOT_OFF = 4;
var VERT_SYNC_OFF_BOT_MASK = 0x0F;
dtd.vertSyncOff = (((this.edidData[dtdIndex+11] >> VERT_SYNC_OFF_TOP_OFF)
& VERT_SYNC_OFF_TOP_MASK) << 4) |
((this.edidData[dtdIndex+10] >> VERT_SYNC_OFF_BOT_OFF) &
VERT_SYNC_OFF_BOT_MASK);
var VERT_SYNC_PULSE_TOP_MASK = 0x03;
var VERT_SYNC_PULSE_BOT_MASK = 0x0F;
dtd.vertSyncPulse = ((this.edidData[dtdIndex+11] & VERT_SYNC_PULSE_TOP_MASK)
<< 4) | (this.edidData[dtdIndex+10] & VERT_SYNC_PULSE_BOT_MASK);
var HOR_DISPLAY_TOP_OFF = 4;
var HOR_DISPLAY_TOP_MASK = 0x0F;
dtd.horDisplaySize = (((this.edidData[dtdIndex+14] >> HOR_DISPLAY_TOP_OFF)
& HOR_DISPLAY_TOP_MASK) << 8) | this.edidData[dtdIndex+12];
var VERT_DISPLAY_TOP_MASK = 0x0F;
dtd.vertDisplaySize = ((this.edidData[dtdIndex+14] & VERT_DISPLAY_TOP_MASK) << 8)
| this.edidData[dtdIndex+13];
dtd.horBorderPixels = this.edidData[dtdIndex+15];
dtd.vertBorderLines = this.edidData[dtdIndex+16];
var INTERLACED_MASK = 0x80;
dtd.interlaced = (this.edidData[dtdIndex+17] & INTERLACED_MASK) ? true : false;
var STEREO_MODE_OFFSET = 5;
var STEREO_MODE_MASK = 0x03;
dtd.stereoMode = ((this.edidData[dtdIndex+17] >> STEREO_MODE_OFFSET) &
STEREO_MODE_MASK);
var SYNC_TYPE_OFFSET = 3;
var SYNC_TYPE_MASK = 0x03;
dtd.syncType = ((this.edidData[dtdIndex+17] >> SYNC_TYPE_OFFSET) &
SYNC_TYPE_MASK);
// Bit is dependent on sync type
if(dtd.syncType == this.syncTypeEnum.DIGITAL_SEPARATE)
{
var VSYNC_POLARITY_MASK = 0x04;
dtd.vSyncPolarity = (this.edidData[dtdIndex+17] &
VSYNC_POLARITY_MASK) ? true : false;
}
else
{
var VSYNC_SERRATED_MASK = 0x04;
dtd.vSyncSerrated = (this.edidData[dtdIndex+17] &
VSYNC_SERRATED_MASK) ? true : false;
}
// Bit is dependent on syn type
if((dtd.syncType == this.syncTypeEnum.ANALOG_COMPOSITE) ||
(dtd.syncType == this.syncTypeEnum.BIPOLAR_ANALOG_COMPOSITE))
{
var SYNC_ALL_RGB_MASK = 0x02;
dtd.syncAllRGBLines = (this.edidData[dtdIndex+17] &
SYNC_ALL_RGB_MASK) ? true : false;
}
else
{
var HSYNC_POLARY_MASK = 0x02;
dtd.hSyncPolarity = (this.edidData[dtdIndex+17] &
HSYNC_POLARY_MASK) ? true : false;
}
var TWO_WAY_STEREO_MASK = 0x01;
dtd.twoWayStereo = (this.edidData[dtdIndex+17] & TWO_WAY_STEREO_MASK) ? true : false;
return dtd;
}
Edid.prototype.getDtds = function()
{
var dtdArray = new Array();
var dtdCounter = 0;
var DTD_START = 54;
var DTD_END = 125;
var dtdIndex = DTD_START;
// While the pixel clock is not equal to zero and
// the DTD index is less than the last byte of the DTD
while(((this.edidData[dtdIndex] != 0) || (this.edidData[dtdIndex+1] != 0))
&& (dtdIndex < DTD_END))
{
var dtd = this.parseDtd(dtdIndex);
// Add DTD to the DTD Array
dtdArray[dtdCounter] = dtd;
// Increment DTD Counter
dtdCounter++;
// Add a DTD length, to go to the next descriptor
dtdIndex += this.DTD_LENGTH;
}
return dtdArray;
}
Edid.prototype.getNumberExtensions = function()
{
var NUMBER_OF_EXTENSIONS = 126;
return this.edidData[NUMBER_OF_EXTENSIONS];
}
Edid.prototype.getChecksum = function()
{
var CHECKSUM = 127;
return this.edidData[CHECKSUM];
}
Edid.prototype.calcChecksum = function(block)
{
var startAddress = block * this.EDID_BLOCK_LENGTH;
var endAddress = startAddress + this.EDID_BLOCK_LENGTH - 1;
var checksum = 0;
for(var index = startAddress; index < endAddress; index++)
{
checksum += this.edidData[index];
}
return (256- (checksum % 256));
}
Edid.prototype.validChecksum = function(block)
{
var checksum = this.edidData[((block+1) * this.EDID_BLOCK_LENGTH) - 1];
var calculatedChecksum = this.calcChecksum(block);
var validChecksum = new Boolean();
if(checksum == calculatedChecksum)
{
validChecksum = true;
}
else
{
validChecksum = false;
}
return validChecksum;
}
Edid.prototype.getExtTag = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var EXT_TAG = BLOCK_OFFSET + 0;
return this.edidData[EXT_TAG];
}
Edid.prototype.getRevisionNumber = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var REV_NUMBER = BLOCK_OFFSET + 1;
return this.edidData[REV_NUMBER];
}
Edid.prototype.getDtdStart = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var DTD_START = BLOCK_OFFSET + 2;
return this.edidData[DTD_START];
}
Edid.prototype.getNumberExtDtds = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var NUM_DTDS = BLOCK_OFFSET + 3;
var NUM_DTDS_MASK = 0x0F;
return (this.edidData[NUM_DTDS] & NUM_DTDS_MASK);
}
Edid.prototype.getUnderscan = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var UNDERSCAN = BLOCK_OFFSET + 3;
var UNDERSCAN_MASK = 0x80;
return (this.edidData[UNDERSCAN] & UNDERSCAN_MASK)?true:false;
}
Edid.prototype.getBasicAudio = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var BASIC_AUDIO = BLOCK_OFFSET + 3;
var BASIC_AUDIO_MASK = 0x40;
return (this.edidData[BASIC_AUDIO] & BASIC_AUDIO_MASK)?true:false;
}
Edid.prototype.getYcBcR444 = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var YCBCR_444 = BLOCK_OFFSET + 3;
var YCBCR_444_MASK = 0x20;
return (this.edidData[YCBCR_444] & YCBCR_444_MASK)?true:false;
}
Edid.prototype.getYcBcR422 = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var YCBCR_422 = BLOCK_OFFSET + 3;
var YCBCR_422_MASK = 0x10;
return (this.edidData[YCBCR_422] & YCBCR_422_MASK)?true:false;
}
Edid.prototype.parseDataBlockCollection = function(extIndex)
{
var BLOCK_OFFSET = this.EDID_BLOCK_LENGTH * (extIndex+1);
var START_DATA_BLOCK = 4;
var startAddress = BLOCK_OFFSET + START_DATA_BLOCK;
var dataBlockLength = this.exts[extIndex].dtdStart - START_DATA_BLOCK;
var endAddress = startAddress + dataBlockLength;
var dataBlockCollection = new Array();
var TAG_CODE_MASK = 0x07;
var TAG_CODE_OFFSET = 5;
var DATA_BLOCK_LENGTH_MASK = 0x1F;
var index = startAddress;
var numberDataBlocks = 0;
while(index < endAddress)
{
// Parse tag code
var blockTagCode = (this.edidData[index] >> TAG_CODE_OFFSET) & TAG_CODE_MASK;
// Parse Length
var blockLength = (this.edidData[index] & DATA_BLOCK_LENGTH_MASK);
// Object that holds Parsed Data block
var dataBlock;
// Parse the data block by the tag code
if(blockTagCode == this.dataBlockType.AUDIO.value)
{
dataBlock = this.parseAudioDataBlock(index+1,blockLength);
}
else if(blockTagCode == this.dataBlockType.VIDEO.value)
{
dataBlock = this.parseVideoDataBlock(index+1,blockLength);
}
else if(blockTagCode == this.dataBlockType.VENDOR_SPECIFIC.value)
{
dataBlock = this.parseVendorDataBlock(index+1,blockLength);
}
else if(blockTagCode == this.dataBlockType.SPEAKER_ALLOCATION.value)
{
dataBlock = this.parseSpeakerDataBlock(index+1,blockLength);
}
// Add the new object to the data block collection
dataBlockCollection[numberDataBlocks] = dataBlock;
// Increment the Index, to the location of the next block
index += (blockLength + 1);
// Increment the number of data blocks
numberDataBlocks++;
}
return dataBlockCollection;
}
Edid.prototype.parseAudioDataBlock = function(startAddress, blockLength)
{
var audioBlock = new Array();
// Audio blocks are made up of Short Audio Descriptors that are three bytes each
var SHORT_AUDIO_DESC_LENGTH = 3;
// The number of Short Audio Descriptors is the block length divided by the descriptor size
var numberShortAudioDescriptors = blockLength / SHORT_AUDIO_DESC_LENGTH;
var shortAudDescIndex = 0;
var index = startAddress;
// Set the Audio Block Tag
audioBlock.tag = this.dataBlockType.AUDIO;
// Set the Audio block length
audioBlock.dataLength = blockLength;
// Set the number of short audio descriptors
audioBlock.length = numberShortAudioDescriptors;
// Create array for short audio descriptors
audioBlock.shortAudioDescriptors = new Array();
// Parse the short audio descriptors in the Audio Data Block
var SHORT_AUDIO_DESC_MASK = 0x0F;
var SHORT_AUDIO_DESC_OFF = 3;
var MAX_CHANNELS_MASK = 0x07;
var SAMPLE_RATE_MASK = 0x7F;
while(shortAudDescIndex < numberShortAudioDescriptors)
{
// Each Short Audio Descriptor is a 3 byte object
var shortAudDesc = new Object();
// Parse the format
shortAudDesc.format = (this.edidData[index] >> SHORT_AUDIO_DESC_OFF) & SHORT_AUDIO_DESC_MASK;
// Parse max number of channels
shortAudDesc.maxChannels = (this.edidData[index] & MAX_CHANNELS_MASK) + 1;
// Parse audio sample rates
shortAudDesc.sampleRates = this.edidData[index+1] & SAMPLE_RATE_MASK;
if(shortAudDesc.format <= this.audioFormatArray[0])
{
var BIT_DEPTH_MASK = 0x07;
shortAudDesc.bitDepth = this.edidData[index+2] & BIT_DEPTH_MASK;
}
else if(shortAudDesc.format <= this.audioFormatArray[1])
{
var MAX_BIT_RATE_MASK = 0xFF;
shortAudDesc.bitRate = (this.edidData[index+2] & MAX_BIT_RATE_MASK) * 8;
}
else if(shortAudDesc.format <= this.audioFormatArray[2])
{
var AUDIO_FORMAT_CODE_MASK = 0xFF;
shortAudDesc.audioFormatCode = this.edidData[index+2] & AUDIO_FORMAT_CODE_MASK;
}
else if(shortAudDesc.format <= this.audioFormatArray[3])
{
var PROFILE_MASK = 0x07;
shortAudDesc.profile = this.edidData[index+2] & PROFILE_MASK;
}
else if(shortAudDesc.format <= this.audioFormatArray[4])
{
var FORMAT_CODE_EXT_OFF = 3;
var FORMAT_CODE_EXT_MASK = 0x1F;
shortAudDesc.formatCodeExt = (this.edidData[index+2] >> FORMAT_CODE_EXT_OFF) & FORMAT_CODE_EXT_MASK;
}
// Add Short Audio Descriptor to Audio Data Block
audioBlock.shortAudioDescriptors[shortAudDescIndex] = shortAudDesc;
// Move the index to the beginning of the next Short Audio Descriptor
index += SHORT_AUDIO_DESC_LENGTH;
// Increment the count to the next Short Audio Descriptor
shortAudDescIndex++;
}
return audioBlock;
}
Edid.prototype.parseVideoDataBlock = function(startAddress, blockLength)
{
var videoBlock = new Object();
videoBlock.tag = this.dataBlockType.VIDEO;
videoBlock.length = blockLength;
var index = 0;
videoBlock.shortVideoDescriptors = new Array();
var VIC_MASK = 0x7F;
var NATIVE_RESOLUTION_MASK = 0x80;
while(index < blockLength)
{
shortVideoDescriptor = new Object;
shortVideoDescriptor.vic = this.edidData[startAddress+index] & VIC_MASK;
shortVideoDescriptor.nativeResolution = (this.edidData[startAddress+index] &
NATIVE_RESOLUTION_MASK)?true:false;
videoBlock.shortVideoDescriptors[index] = shortVideoDescriptor;
index++;
}
return videoBlock;
}
Edid.prototype.parseVendorDataBlock = function(startAddress, blockLength)
{
var vendorBlock = new Object();
vendorBlock.tag = this.dataBlockType.VENDOR_SPECIFIC;
vendorBlock.length = blockLength;
// Subtract one, so the indexing matches the HDMI Specification
vsdbAddress = startAddress - 1;
var IEEE_REG_IDENTIFIER_1 = 1;
var IEEE_REG_IDENTIFIER_2 = 2;
var IEEE_REG_IDENTIFIER_3 = 3;
// 24-bit IEEE Registration Identifier
vendorBlock.ieeeIdentifier = (this.edidData[vsdbAddress+IEEE_REG_IDENTIFIER_3] << 16) |
(this.edidData[vsdbAddress+IEEE_REG_IDENTIFIER_2] << 8) |
(this.edidData[vsdbAddress+IEEE_REG_IDENTIFIER_1]);
var PHYSICAL_ADDRESS_1 = 4;
var PHYSICAL_ADDRESS_2 = 5;
// Physical Address
vendorBlock.physicalAddress = (this.edidData[vsdbAddress+PHYSICAL_ADDRESS_1] << 8) |
(this.edidData[vsdbAddress+PHYSICAL_ADDRESS_2]);
var AI_DC_DUAL_ADDRESS = 6;
if(blockLength >= AI_DC_DUAL_ADDRESS)
{
var SUPPORT_AI_MASK = 0x80;
// Parse Supports ACP, ISRC1, ISRC2
vendorBlock.supportsAI = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & SUPPORT_AI_MASK)
?true:false;
var DEEP_COLOR_48_MASK = 0x40;
vendorBlock.deepColor48 = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & DEEP_COLOR_48_MASK)
?true:false;
var DEEP_COLOR_36_MASK = 0x20;
vendorBlock.deepColor36 = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & DEEP_COLOR_36_MASK)
?true:false;
var DEEP_COLOR_30_MASK = 0x10;
vendorBlock.deepColor30 = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & DEEP_COLOR_30_MASK)
?true:false;
var DEEP_COLOR_Y444_MASK = 0x08;
vendorBlock.deepColorY444 = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & DEEP_COLOR_Y444_MASK)
?true:false;
var DUAL_DVI_MASK = 0x01;
vendorBlock.dualDvi = (this.edidData[vsdbAddress+AI_DC_DUAL_ADDRESS] & DUAL_DVI_MASK)
?true:false;
}
var MAX_TMDS_CLOCK_ADDRESS = 7;
if(blockLength >= MAX_TMDS_CLOCK_ADDRESS)
{
// Parse Max TMDS rate, the edid has TMDS clock. Multiply TMDS clock x 5Mhz
// and you'll get max TMDS rate
vendorBlock.maxTmdsRate = this.edidData[vsdbAddress+MAX_TMDS_CLOCK_ADDRESS] * 5;
}
var LATENCY_PRESENT_ADDRESS = 8;
if(blockLength >= LATENCY_PRESENT_ADDRESS)
{
var LATENCY_FIELDS_PRESENT_MASK = 0x80;
vendorBlock.latencyPresent = (this.edidData[vsdbAddress+LATENCY_PRESENT_ADDRESS] & LATENCY_FIELDS_PRESENT_MASK)
?true:false;
var I_LATENCY_FIELDS_PRESENT_MASK = 0x80;
vendorBlock.iLatencyPresent = (this.edidData[vsdbAddress+LATENCY_PRESENT_ADDRESS] & I_LATENCY_FIELDS_PRESENT_MASK)
?true:false;
}
// If Latency fields are present
if(vendorBlock.latencyPresent && (blockLength >= AUDIO_LATENCY_ADDRESS))
{
var VIDEO_LATENCY_ADDRESS = 9;
// TODO: Add description
vendorBlock.videoLatency = ((this.edidData[vsdbAddress+VIDEO_LATENCY_ADDRESS] - 1)
*2);
var AUDIO_LATENCY_ADDRESS = 10;
// TODO: Add description
vendorBlock.audioLatency = ((this.edidData[vsdbAddress+AUDIO_LATENCY_ADDRESS] - 1)
*2);
}
// If Interlaced Latency fields are present
if(vendorBlock.iLatencyPresent && (blockLength >= I_AUDIO_LATENCY_ADDRESS))
{
var I_VIDEO_LATENCY_ADDRESS = 11;
// TODO: Add description
vendorBlock.iVideoLatency = ((this.edidData[vsdbAddress+I_VIDEO_LATENCY_ADDRESS] - 1)
*2);
var I_AUDIO_LATENCY_ADDRESS = 12;
// TODO: Add description
vendorBlock.iAudioLatency = ((this.edidData[vsdbAddress+I_AUDIO_LATENCY_ADDRESS] - 1)
*2);
}
return vendorBlock;
}
Edid.prototype.parseSpeakerDataBlock = function(startAddress, blockLength)
{
var speakerBlock = new Object();