/**
* MKVInfo
* v 5.0 2020/12/12
* 2020/12/20 rebug date : lastModifiedDate (deprecate) => lastModified ET remontée du nombre d'accès disque
* rajouter tags 55b0- 55bd + quelques contrôles permettant de remonter les erreurs rencontrées sur de mauvais fichiers :-)
* v 6.0 2021/02/11 rebug : cas de Jodorowsky's Dune (Element de type 'm' - Master - et de dataSize = 0 : ContentCompression en l'occurence)
cas de Trahie : multiples éléments de type 'info' avec 1 seul possédant 'duration'
* v 7.0 2022/11/26 rebug : cas de Enola Holmes 2 : rajout de tags manquants
* v 8.0 2022/11/27 aucun bug mais décision d'intégrer tous les tags selon ref 4 ci-dessous EN conservant les anciens !
* Documentation :
* https://www.ffmpeg.org/doxygen/2.1/matroska_8h_source.html
* https://github.com/themasch/node-ebml
* https://permadi.com/2010/06/webm-file-structure/
* https://www.matroska.org/technical/elements.html <-- liste des tags
* https://www.matroska.org/technical/specs/index.html
* https://matroska.org/files/matroska.pdf
* https://fr.wikipedia.org/wiki/IEEE_754
* http://www.h-schmidt.net/FloatConverter/IEEE754.html
* https://stackoverflow.com/questions/43933735/conversion-utf-8-uint8array-to-utf-8-string
* https://fr.w3docs.com/snippets/javascript/comment-detecter-internet-explorer-en-javascript.html
* http://openvibe.inria.fr/documentation/1.3.0/Doc_ParsingEBMLStreams.html
*/
"use strict";
var mkv = function(opts, fcb) {
var info = {};
info.file = opts;
info.filesize = info.file.size;
info.filename = info.file.name;
info.filedate = info.file.lastModified;
info.offset = 0;
info.tracks = [];
info.JUNKS = []; // for stocking JUNKS boxes to be devared after replacing values !
info.noVal = []; // for stocking boxes where values not obtained during boxes parsing
info.lengthmax = 128; // could be adapted !!
info.nbboucleslect = 0; // number of acces to blob.slice.read
var MKVebml = {};
MKVebml.parse = async function(fcb) {
var schema = {
"42f2": { "name": "EBMLMaxIDLength", "type": "u"},
"42f3": { "name": "EBMLMaxSizeLength", "type": "u"},
"18538067": { "name": "Segment", "type": "m"},
"114d9b74": { "name": "SeekHead", "type": "m"},
"4dbb": { "name": "Seek", "type": "m"},
"53ab": { "name": "SeekID", "type": "b"},
"53ac": { "name": "SeekPosition", "type": "u"},
"1549a966": { "name": "Info", "type": "m"},
"73a4": { "name": "SegmentUUID", "type": "b"},
"7384": { "name": "SegmentFilename", "type": "8"},
"3cb923": { "name": "PrevUUID", "type": "b"},
"3c83ab": { "name": "PrevFilename", "type": "8"},
"3eb923": { "name": "NextUUID", "type": "b"},
"3e83bb": { "name": "NextFilename", "type": "8"},
"4444": { "name": "SegmentFamily", "type": "b"},
"6924": { "name": "ChapterTranslate", "type": "m"},
"69a5": { "name": "ChapterTranslateID", "type": "b"},
"69bf": { "name": "ChapterTranslateCodec", "type": "u"},
"69fc": { "name": "ChapterTranslateEditionUID", "type": "u"},
"2ad7b1": { "name": "TimestampScale", "type": "u"},
"4489": { "name": "Duration", "type": "f"},
"4461": { "name": "DateUTC", "type": "d"},
"7ba9": { "name": "Title", "type": "8"},
"4d80": { "name": "MuxingApp", "type": "8"},
"5741": { "name": "WritingApp", "type": "8"},
"1f43b675": { "name": "Cluster", "type": "m"},
"e7": { "name": "Timestamp", "type": "u"},
"5854": { "name": "SilentTracks", "type": "m"},
"58d7": { "name": "SilentTrackNumber", "type": "u"},
"a7": { "name": "Position", "type": "u"},
"ab": { "name": "PrevSize", "type": "u"},
"a3": { "name": "SimpleBlock", "type": "b"},
"a0": { "name": "BlockGroup", "type": "m"},
"a1": { "name": "Block", "type": "b"},
"a2": { "name": "BlockVirtual", "type": "b"},
"75a1": { "name": "BlockAdditions", "type": "m"},
"a6": { "name": "BlockMore", "type": "m"},
"a5": { "name": "BlockAdditional", "type": "b"},
"ee": { "name": "BlockAddID", "type": "u"},
"9b": { "name": "BlockDuration", "type": "u"},
"fa": { "name": "ReferencePriority", "type": "u"},
"fb": { "name": "ReferenceBlock", "type": "i"},
"fd": { "name": "ReferenceVirtual", "type": "i"},
"a4": { "name": "CodecState", "type": "b"},
"75a2": { "name": "DiscardPadding", "type": "i"},
"8e": { "name": "Slices", "type": "m"},
"e8": { "name": "TimeSlice", "type": "m"},
"cc": { "name": "LaceNumber", "type": "u"},
"cd": { "name": "FrameNumber", "type": "u"},
"cb": { "name": "BlockAdditionID", "type": "u"},
"ce": { "name": "Delay", "type": "u"},
"cf": { "name": "SliceDuration", "type": "u"},
"c8": { "name": "ReferenceFrame", "type": "m"},
"c9": { "name": "ReferenceOffset", "type": "u"},
"ca": { "name": "ReferenceTimestamp", "type": "u"},
"af": { "name": "EncryptedBlock", "type": "b"},
"1654ae6b": { "name": "Tracks", "type": "m"},
"ae": { "name": "TrackEntry", "type": "m"},
"d7": { "name": "TrackNumber", "type": "u"},
"73c5": { "name": "TrackUID", "type": "u"},
"83": { "name": "TrackType", "type": "u"},
"b9": { "name": "FlagEnabled", "type": "u"},
"88": { "name": "FlagDefault", "type": "u"},
"55aa": { "name": "FlagForced", "type": "u"},
"55ab": { "name": "FlagHearingImpaired", "type": "u"},
"55ac": { "name": "FlagVisualImpaired", "type": "u"},
"55ad": { "name": "FlagTextDescriptions", "type": "u"},
"55ae": { "name": "FlagOriginal", "type": "u"},
"55af": { "name": "FlagCommentary", "type": "u"},
"9c": { "name": "FlagLacing", "type": "u"},
"6de7": { "name": "MinCache", "type": "u"},
"6df8": { "name": "MaxCache", "type": "u"},
"23e383": { "name": "DefaultDuration", "type": "u"},
"234e7a": { "name": "DefaultDecodedFieldDuration", "type": "u"},
"23314f": { "name": "TrackTimestampScale", "type": "f"},
"537f": { "name": "TrackOffset", "type": "i"},
"55ee": { "name": "MaxBlockAdditionID", "type": "u"},
"41e4": { "name": "BlockAdditionMapping", "type": "m"},
"41f0": { "name": "BlockAddIDValue", "type": "u"},
"41a4": { "name": "BlockAddIDName", "type": "s"},
"41e7": { "name": "BlockAddIDType", "type": "u"},
"41ed": { "name": "BlockAddIDExtraData", "type": "b"},
"536e": { "name": "Name", "type": "8"},
"22b59c": { "name": "Language", "type": "s"},
"22b59d": { "name": "LanguageBCP47", "type": "s"},
"86": { "name": "CodecID", "type": "s"},
"63a2": { "name": "CodecPrivate", "type": "b"},
"258688": { "name": "CodecName", "type": "8"},
"7446": { "name": "AttachmentLink", "type": "u"},
"3a9697": { "name": "CodecSettings", "type": "8"},
"3b4040": { "name": "CodecInfoURL", "type": "s"},
"26b240": { "name": "CodecDownloadURL", "type": "s"},
"aa": { "name": "CodecDecodeAll", "type": "u"},
"6fab": { "name": "TrackOverlay", "type": "u"},
"56aa": { "name": "CodecDelay", "type": "u"},
"56bb": { "name": "SeekPreRoll", "type": "u"},
"6624": { "name": "TrackTranslate", "type": "m"},
"66a5": { "name": "TrackTranslateTrackID", "type": "b"},
"66bf": { "name": "TrackTranslateCodec", "type": "u"},
"66fc": { "name": "TrackTranslateEditionUID", "type": "u"},
"e0": { "name": "Video", "type": "m"},
"9a": { "name": "FlagInterlaced", "type": "u"},
"9d": { "name": "FieldOrder", "type": "u"},
"53b8": { "name": "StereoMode", "type": "u"},
"53c0": { "name": "AlphaMode", "type": "u"},
"53b9": { "name": "OldStereoMode", "type": "u"},
"b0": { "name": "PixelWidth", "type": "u"},
"ba": { "name": "PixelHeight", "type": "u"},
"54aa": { "name": "PixelCropBottom", "type": "u"},
"54bb": { "name": "PixelCropTop", "type": "u"},
"54cc": { "name": "PixelCropLeft", "type": "u"},
"54dd": { "name": "PixelCropRight", "type": "u"},
"54b0": { "name": "DisplayWidth", "type": "u"},
"54ba": { "name": "DisplayHeight", "type": "u"},
"54b2": { "name": "DisplayUnit", "type": "u"},
"54b3": { "name": "AspectRatioType", "type": "u"},
"2eb524": { "name": "UncompressedFourCC", "type": "b"},
"2fb523": { "name": "GammaValue", "type": "f"},
"2383e3": { "name": "FrameRate", "type": "f"},
"55b0": { "name": "Colour", "type": "m"},
"55b1": { "name": "MatrixCoefficients", "type": "u"},
"55b2": { "name": "BitsPerChannel", "type": "u"},
"55b3": { "name": "ChromaSubsamplingHorz", "type": "u"},
"55b4": { "name": "ChromaSubsamplingVert", "type": "u"},
"55b5": { "name": "CbSubsamplingHorz", "type": "u"},
"55b6": { "name": "CbSubsamplingVert", "type": "u"},
"55b7": { "name": "ChromaSitingHorz", "type": "u"},
"55b8": { "name": "ChromaSitingVert", "type": "u"},
"55b9": { "name": "Range", "type": "u"},
"55ba": { "name": "TransferCharacteristics", "type": "u"},
"55bb": { "name": "Primaries", "type": "u"},
"55bc": { "name": "MaxCLL", "type": "u"},
"55bd": { "name": "MaxFALL", "type": "u"},
"55d0": { "name": "MasteringMetadata", "type": "m"},
"55d1": { "name": "PrimaryRChromaticityX", "type": "f"},
"55d2": { "name": "PrimaryRChromaticityY", "type": "f"},
"55d3": { "name": "PrimaryGChromaticityX", "type": "f"},
"55d4": { "name": "PrimaryGChromaticityY", "type": "f"},
"55d5": { "name": "PrimaryBChromaticityX", "type": "f"},
"55d6": { "name": "PrimaryBChromaticityY", "type": "f"},
"55d7": { "name": "WhitePointChromaticityX", "type": "f"},
"55d8": { "name": "WhitePointChromaticityY", "type": "f"},
"55d9": { "name": "LuminanceMax", "type": "f"},
"55da": { "name": "LuminanceMin", "type": "f"},
"7670": { "name": "Projection", "type": "m"},
"7671": { "name": "ProjectionType", "type": "u"},
"7672": { "name": "ProjectionPrivate", "type": "b"},
"7673": { "name": "ProjectionPoseYaw", "type": "f"},
"7674": { "name": "ProjectionPosePitch", "type": "f"},
"7675": { "name": "ProjectionPoseRoll", "type": "f"},
"e1": { "name": "Audio", "type": "m"},
"b5": { "name": "SamplingFrequency", "type": "f"},
"78b5": { "name": "OutputSamplingFrequency", "type": "f"},
"9f": { "name": "Channels", "type": "u"},
"7d7b": { "name": "ChannelPositions", "type": "b"},
"6264": { "name": "BitDepth", "type": "u"},
"52f1": { "name": "Emphasis", "type": "u"},
"e2": { "name": "TrackOperation", "type": "m"},
"e3": { "name": "TrackCombinePlanes", "type": "m"},
"e4": { "name": "TrackPlane", "type": "m"},
"e5": { "name": "TrackPlaneUID", "type": "u"},
"e6": { "name": "TrackPlaneType", "type": "u"},
"e9": { "name": "TrackJoinBlocks", "type": "m"},
"ed": { "name": "TrackJoinUID", "type": "u"},
"c0": { "name": "TrickTrackUID", "type": "u"},
"c1": { "name": "TrickTrackSegmentUID", "type": "b"},
"c6": { "name": "TrickTrackFlag", "type": "u"},
"c7": { "name": "TrickMasterTrackUID", "type": "u"},
"c4": { "name": "TrickMasterTrackSegmentUID", "type": "b"},
"6d80": { "name": "ContentEncodings", "type": "m"},
"6240": { "name": "ContentEncoding", "type": "m"},
"5031": { "name": "ContentEncodingOrder", "type": "u"},
"5032": { "name": "ContentEncodingScope", "type": "u"},
"5033": { "name": "ContentEncodingType", "type": "u"},
"5034": { "name": "ContentCompression", "type": "m"},
"4254": { "name": "ContentCompAlgo", "type": "u"},
"4255": { "name": "ContentCompSettings", "type": "b"},
"5035": { "name": "ContentEncryption", "type": "m"},
"47e1": { "name": "ContentEncAlgo", "type": "u"},
"47e2": { "name": "ContentEncKeyID", "type": "b"},
"47e7": { "name": "ContentEncAESSettings", "type": "m"},
"47e8": { "name": "AESSettingsCipherMode", "type": "u"},
"47e3": { "name": "ContentSignature", "type": "b"},
"47e4": { "name": "ContentSigKeyID", "type": "b"},
"47e5": { "name": "ContentSigAlgo", "type": "u"},
"47e6": { "name": "ContentSigHashAlgo", "type": "u"},
"1c53bb6b": { "name": "Cues", "type": "m"},
"bb": { "name": "CuePoint", "type": "m"},
"b3": { "name": "CueTime", "type": "u"},
"b7": { "name": "CueTrackPositions", "type": "m"},
"f7": { "name": "CueTrack", "type": "u"},
"f1": { "name": "CueClusterPosition", "type": "u"},
"f0": { "name": "CueRelativePosition", "type": "u"},
"b2": { "name": "CueDuration", "type": "u"},
"5378": { "name": "CueBlockNumber", "type": "u"},
"ea": { "name": "CueCodecState", "type": "u"},
"db": { "name": "CueReference", "type": "m"},
"96": { "name": "CueRefTime", "type": "u"},
"97": { "name": "CueRefCluster", "type": "u"},
"535f": { "name": "CueRefNumber", "type": "u"},
"eb": { "name": "CueRefCodecState", "type": "u"},
"1941a469": { "name": "Attachments", "type": "m"},
"61a7": { "name": "AttachedFile", "type": "m"},
"467e": { "name": "FileDescription", "type": "8"},
"466e": { "name": "FileName", "type": "8"},
"4660": { "name": "FileMediaType", "type": "s"},
"465c": { "name": "FileData", "type": "b"},
"46ae": { "name": "FileUID", "type": "u"},
"4675": { "name": "FileReferral", "type": "b"},
"4661": { "name": "FileUsedStartTime", "type": "u"},
"4662": { "name": "FileUsedEndTime", "type": "u"},
"1043a770": { "name": "Chapters", "type": "m"},
"45b9": { "name": "EditionEntry", "type": "m"},
"45bc": { "name": "EditionUID", "type": "u"},
"45bd": { "name": "EditionFlagHidden", "type": "u"},
"45db": { "name": "EditionFlagDefault", "type": "u"},
"45dd": { "name": "EditionFlagOrdered", "type": "u"},
"4520": { "name": "EditionDisplay", "type": "m"},
"4521": { "name": "EditionString", "type": "8"},
"45e4": { "name": "EditionLanguageIETF", "type": "s"},
"b6": { "name": "ChapterAtom", "type": "m"},
"73c4": { "name": "ChapterUID", "type": "u"},
"5654": { "name": "ChapterStringUID", "type": "8"},
"91": { "name": "ChapterTimeStart", "type": "u"},
"92": { "name": "ChapterTimeEnd", "type": "u"},
"98": { "name": "ChapterFlagHidden", "type": "u"},
"4598": { "name": "ChapterFlagEnabled", "type": "u"},
"6e67": { "name": "ChapterSegmentUUID", "type": "b"},
"4588": { "name": "ChapterSkipType", "type": "u"},
"6ebc": { "name": "ChapterSegmentEditionUID", "type": "u"},
"63c3": { "name": "ChapterPhysicalEquiv", "type": "u"},
"8f": { "name": "ChapterTrack", "type": "m"},
"89": { "name": "ChapterTrackUID", "type": "u"},
"80": { "name": "ChapterDisplay", "type": "m"},
"85": { "name": "ChapString", "type": "8"},
"437c": { "name": "ChapLanguage", "type": "s"},
"437d": { "name": "ChapLanguageBCP47", "type": "s"},
"437e": { "name": "ChapCountry", "type": "s"},
"6944": { "name": "ChapProcess", "type": "m"},
"6955": { "name": "ChapProcessCodecID", "type": "u"},
"450d": { "name": "ChapProcessPrivate", "type": "b"},
"6911": { "name": "ChapProcessCommand", "type": "m"},
"6922": { "name": "ChapProcessTime", "type": "u"},
"6933": { "name": "ChapProcessData", "type": "b"},
"1254c367": { "name": "Tags", "type": "m"},
"7373": { "name": "Tag", "type": "m"},
"63c0": { "name": "Targets", "type": "m"},
"68ca": { "name": "TargetTypeValue", "type": "u"},
"63ca": { "name": "TargetType", "type": "s"},
"63c5": { "name": "TagTrackUID", "type": "u"},
"63c9": { "name": "TagEditionUID", "type": "u"},
"63c4": { "name": "TagChapterUID", "type": "u"},
"63c6": { "name": "TagAttachmentUID", "type": "u"},
"67c8": { "name": "SimpleTag", "type": "m"},
"45a3": { "name": "TagName", "type": "8"},
"447a": { "name": "TagLanguage", "type": "s"},
"447b": { "name": "TagLanguageBCP47", "type": "s"},
"4484": { "name": "TagDefault", "type": "u"},
"44b4": { "name": "TagDefaultBogus", "type": "u"},
"4487": { "name": "TagString", "type": "8"},
"4485": { "name": "TagBinary", "type": "b"},
//---------------------- old tags voir ebml.db -------------------------//
"4282": { "name": "DocType", "type": "s"},
"4285": { "name": "DocTypeReadVersion", "type": "u"},
"4286": { "name": "EBMLVersion", "type": "u"},
"4287": { "name": "DocTypeVersion", "type": "u"},
"6532": { "name": "SignedElement", "type": "b"},
"2ad7b2": { "name": "TimecodeScaleDenominator", "type": "u"},
"7e7b": { "name": "SignatureElementList", "type": "m"},
"7e5b": { "name": "SignatureElements", "type": "m"},
"7eb5": { "name": "Signature", "type": "b"},
"7ea5": { "name": "SignaturePublicKey", "type": "b"},
"7e9a": { "name": "SignatureHash", "type": "u"},
"7e8a": { "name": "SignatureAlgo", "type": "u"},
"1b538667": { "name": "SignatureSlot", "type": "m"},
"bf": { "name": "CRC-32", "type": "b"},
"ec": { "name": "Void", "type": "b"},
"42f7": { "name": "EBMLReadVersion", "type": "u"},
"1a45dfa3": { "name": "EBML", "type": "m"}
}; // definition de schema
function singleprec(val) {
var sig, exp, mexp, mant, nmant, tmp; // 1, 8, 23
sig = parseInt(val / Math.pow(2, 31));
exp = parseInt(val / Math.pow(2, 23)) - (sig * Math.pow(2, 9));
mant = val - (exp * Math.pow(2, 23)) - (sig * Math.pow(2, 31));
nmant = mant.toString(2);
tmp = 1;
for (var k = 0; k < nmant.length; k++) {
if (nmant[nmant.length - 1 - k] == '1') {
tmp += Math.pow(2, -23 + k);
}
}
nmant = tmp;
mexp = exp.toString(2);
tmp = 0;
for (var k = 0; k < mexp.length; k++) {
if (mexp[mexp.length - 1 - k] == '1') {
tmp += Math.pow(2, k);
}
}
mexp = tmp;
tmp = Math.pow(2, mexp - 127) * nmant;
if (sig == 1) tmp = -tmp;
return tmp;
} // singleprec
function doubleprec(val) { // 1, 11, 52
var sig, exp, mexp, mant, nmant, tmp;
sig = parseInt(val / Math.pow(2, 63));
exp = parseInt(val / Math.pow(2, 52)) - (sig * Math.pow(2, 12));
mant = val - (exp * Math.pow(2, 52)) - (sig * Math.pow(2, 63));
nmant = mant.toString(2);
tmp = 1;
for (var k = 0; k < nmant.length; k++) {
if (nmant[nmant.length - 1 - k] == '1') {
tmp += Math.pow(2, -52 + k);
}
}
nmant = tmp;
mexp = exp.toString(2);
tmp = 0;
for (var k = 0; k < mexp.length; k++) {
if (mexp[mexp.length - 1 - k] == '1') {
tmp += Math.pow(2, k);
}
}
mexp = tmp;
tmp = Math.pow(2, mexp - 1024) * nmant;
if (sig == 1) tmp = -tmp;
return tmp;
} // doubleprec
function litHex(buffer, pos, nb) {
if ((pos + nb <= buffer.byteLength) && (pos >= 0) && (nb >= 0)) {
var id = [];
for (var i = pos; i < pos + nb; i++) {
var tmp = buffer.getUint8(i).toString(16);
if (tmp.length == 1) tmp = '0' + tmp;
id.push(tmp);
}
return id.join("");
} else {
console.log(JSON.stringify(info));
console.log('Problème taille de buffer');
fcb('le buffer est trop petit');
}
} // litHex
function litCar(buffer, pos, nb) {
if ((pos + nb <= buffer.byteLength) && (pos >= 0) && (nb >= 0)) {
var id = [];
for (var i = pos; i < pos + nb; i++) {
id.push(String.fromCharCode(buffer.getUint8(i)));
}
return decodeURIComponent(escape(id.join("")));
} else {
console.log(JSON.stringify(info));
console.log('Problème taille de buffer');
fcb('le buffer est trop petit');
}
} // litCar
async function compvareval(ind, Boxes) {
var offset = info.noVal[ind].offset;
var type = info.noVal[ind].type;
var nbB = info.noVal[ind].nbB;
info.nbboucleslect++;
var partie = info.file.slice(offset, offset + nbB);
//console.log('Accès fichier avec offset='+offset);
var tmpblob = new Response(partie);
var buffer = await tmpblob.arrayBuffer(); // ça passe ???
var buffv = new DataView(buffer);
if (nbB < info.lengthmax) {
if (type == "s" || type == "8") {
var tmp = litCar(buffv, 0, nbB);
info.noVal[ind].value = tmp;
}
if (type == "b") {
info.noVal[ind].value = litHex(buffv, 0, nbB).toUpperCase();
}
} else {
info.noVal[ind].value = "Too long, sorry !";
}
return false;
} // compvareval
function purgeboxesJUNKS(Boxes) {
for (var i = info.JUNKS.length - 1; i > -1; i--) {
var orgaJunks = info.JUNKS[i].split("-");
var myBoxe = Boxes[0];
for (var k = 1; k < orgaJunks.length - 1; k++) {
myBoxe = myBoxe.children[orgaJunks[k]];
}
var arrayBox = [];
for (var u = 0; u < myBoxe.children.length; u++) {
if (u != orgaJunks[orgaJunks.length - 1]) arrayBox.push(myBoxe.children[u]);
}
myBoxe.children = [];
for (var v = 0; v < arrayBox.length; v++) myBoxe.children.push(arrayBox[v]);
}
return Boxes;
} // purgeboxesJUNKS
function readAtoms(buffer) {
var start = 0;
for (var length = 1; length <= 8; length++) {
if (buffer.getUint8(start) >= Math.pow(2, 8 - length)) {
break;
}
}
if (length > nbB) { // theorical impossible
fcb("Unrepresentable length: " + length + " 0x" + litHex(buffer, start, length) + " at offset : " + info.offset);
}
var value = buffer.getUint8(start) & (1 << (8 - length)) - 1;
for (var i = 1; i < length; i++) {
if (i === 7) {
if (value >= Math.pow(2, 53 - 8) && buffer.getUint8(start + 7) > 0) {
fcb(' Error 1')
}
}
value *= Math.pow(2, 8);
value += buffer.getUint8(start + i);
}
var tagStr = litHex(buffer, 0, length);
if (schema[tagStr] === undefined) {
console.log(JSON.stringify(info));
console.log('le tag ' + tagStr + ' absent de schema');
fcb('le tag ' + tagStr + ' absent de schema');
}
var tagObj = {
tag: value,
tagStr: tagStr,
type: schema[tagStr].type,
name: schema[tagStr].name,
start: info.offset,
next: length // next position in the buffer
};
/* debug ------------------------------------------- */
//if (schema[tagStr].name == 'ContentCompression'){
// var trc=5;
//}
var start = length; // offset in buffer of dataSize
for (var length = 1; length <= 8; length++) {
if (buffer.getUint8(start) >= Math.pow(2, 8 - length)) {
break;
}
}
if (length + tagObj.next > nbB) {
fcb("Unrepresentable length: " + length + " 0x" + litHex(buffer, start, length) + " at offset : " + info.offset + start);
} else {
tagObj.next += length;
}
var value = buffer.getUint8(start) & (1 << (8 - length)) - 1;
for (var i = 1; i < length; i++) {
if (i === 7) {
if (value >= Math.pow(2, 53 - 8) && buffer.getUint8(start + 7) > 0) {
fcb(' Error 2')
}
}
value *= Math.pow(2, 8);
value += buffer.getUint8(start + i);
}
tagObj.dataSize = value;
// lecture contenu / readContent types : "m" : Master, "u" : unsigned int, "i" : signed int, "s" : string, "8" : UTF-8 string, "b" : binary, "f" : float, "d" : date
if (tagObj.type != "m") {
if (start + value + tagObj.dataSize <= nbB) {
if (tagObj.type == "b") {
tagObj.value = litHex(buffer, tagObj.next, tagObj.dataSize).toUpperCase();
} else {
if (tagObj.type == "d") {
var nbnano = (buffer.getUint32(tagObj.next, false) * (1 << 16) * (1 << 16)) + buffer.getUint32(tagObj.next + 4, false);
tagObj.value = new Date(nbnano / 1000000 + 978307200000);
} else {
if (tagObj.type == "s" || tagObj.type == "8") {
tagObj.value = litCar(buffer, tagObj.next, tagObj.dataSize);
} else {
if (tagObj.type == "b") {
tagObj.value = litHex(buffer, tagObj.next, tagObj.dataSize);
} else { // "u", "i" or "f"
tagObj.value = 0;
for (var u = 0; u < tagObj.dataSize; u++) {
tagObj.value += Math.pow(2, 8 * (tagObj.dataSize - 1 - u)) * buffer.getUint8(tagObj.next + u);
}
if (tagObj.type == "f") {
if (tagObj.dataSize == 4) {
tagObj.value = singleprec(tagObj.value);
} else {
tagObj.value = doubleprec(tagObj.value);
}
} else { // 'i'
if (tagObj.value > Math.pow(2, (8 * tagObj.dataSize) - 1)) {
tagObj.value -= Math.pow(2, 8 * tagObj.dataSize);
}
}
}
}
}
}
}
info.offset = info.offset + tagObj.next + tagObj.dataSize;
} else { //tag.type = "m"
tagObj.children = [];
info.offset = info.offset + tagObj.next;
}
tagObj.nextoffset = tagObj.start + tagObj.next + tagObj.dataSize;
var boxmother = Boxes[0];
for (var k = 1; k < ascendance.length; k++) {
boxmother = boxmother.children[ascendance[k]];
}
boxmother.children.push(tagObj);
ascendance.push(boxmother.children.length - 1);
// save in info.noVal values not obtained because buffer too small / On sauvegarde temporairement les valeurs non obtenues car buffer trop petit
// Ne devrait plus pouvoir être le cas depuis v8 car Void ne fait plus partie de la liste des tags
if ((tagObj.type != "m") && (typeof tagObj.value === 'undefined') && (tagObj.name != 'Void')) {
var tmp = {};
tmp.name = tagObj.name;
tmp.type = tagObj.type;
tmp.nbB = tagObj.dataSize;
tmp.offset = tagObj.start + tagObj.next;
tmp.ascendance = ascendance.join("-");
info.noVal.push(tmp);
}
if (tagObj.name == 'Void') { // on place de côté l'ascendance des boites "VOID"
info.JUNKS.push(ascendance.join("-"));
}
if ((tagObj.type != "m") || ((tagObj.type == 'm') && (tagObj.dataSize == 0))){
// Which box is the next mother ? / Quelle boite est la prochaine mère ?
ascendance.pop(); // ascendance points to boxmere
while ((boxmother.nextoffset == info.offset) && (ascendance.length > 1)) { //
ascendance.pop();
boxmother = Boxes[0];
for (var k = 1; k < ascendance.length; k++) {
boxmother = boxmother.children[ascendance[k]];
}
}
} else {
if ((tagObj.name == 'Cues') || (tagObj.name == 'Cluster') || (tagObj.name == "Tags") || (tagObj.name == "Chapters") || (tagObj.name == "SeekHead")) {
//if ((tagObj.name == 'Cues') || (tagObj.name == "Tags") || (tagObj.name == "Chapters") || (tagObj.name == "SeekHead")) {
// we skip !
info.offset = tagObj.nextoffset;
boxmother.children.pop();
ascendance.pop();
}
}
}
/* --------------------------------------------------------------------
Initialisation : déclaration des globales à parse
-------------------------------------------------------------------- */
info.offset = 0;
var nbBoucles = 0;
var ascendance = [0];
var Boxes = [];
var mere = {};
mere.start = 0;
mere.nextoffset = info.filesize;
mere.name = "OldMammy";
mere.children = [];
Boxes.push(mere);
nbBoucles = 0;
var nbB;
/* --------------------------------------------------------------------
Boucle principale de lecture des "atomes" du fichier .mkv (ou .webm)
Elle crée et enrichit les structures Boxes et ascendance
-------------------------------------------------------------------- */
//async function boucleP(){
while (info.offset < info.filesize) {
var nbBtoRead = info.filesize - info.offset;
var nbB = Math.min(20, nbBtoRead);
var partie = info.file.slice(info.offset, info.offset + nbB);
info.nbboucleslect++;
var tmpblob = new Response(partie);
//console.log('Accès fichier avec offset='+info.offset);
var buffer = await tmpblob.arrayBuffer(); // ça passe !!!
var buffv = new DataView(buffer);
readAtoms(buffv);
nbBoucles += 1;
}
//console.log(JSON.stringify(Boxes)); //FOR DEBUGGING
/* -----------------------------------------------------------
Traitement de nettoyage des info.noVal, de création des atoms[]
et de mise en clair dans info
----------------------------------------------------------- */
var atoms = [];
var nbBtoRead = info.filesize - info.offset;
var nbB = Math.min(20, nbBtoRead);
if (info.noVal.length > 0) {
// Détermination des valeurs "hors cadres" dans la structure info.noVal
// Peut-être directement enregistrées dans Boxes auparavant ?? à voir !
info.ind = 0;
while (info.ind < info.noVal.length) {
await compvareval(info.ind, Boxes);
info.ind += 1;
}
// Mise à jour dans Boxes des valeurs stockées dans info.noVal On peut, dès lors, se passer de info.noVal après coup !
for (var k = 0; k < info.noVal.length; k++) {
var boxe = Boxes[0];
var ascendance = info.noVal[k].ascendance.split("-");
for (var i = 1; i < ascendance.length; i++) {
boxe = boxe.children[ascendance[i]];
}
boxe.value = info.noVal[k].value;
}
//console.log(JSON.stringify(info.noVal)); //FOR DEBUGGING
//console.log(JSON.stringify(info.JUNKS)); //FOR DEBUGGING
Boxes = purgeboxesJUNKS(Boxes);
info.JUNKS = [];
info.noVal = [];
// transfert (??) des Boxes vers atoms ! En fait, après coup, Atoms <= Boxes (intérêt ?)
for (var v = 0; v < Boxes[0].children.length; v++) atoms.push(Boxes[0].children[v]);
Boxes = null;
// analysis of atoms and compvare info :
info.isEBML = -1;
info.isSegment = -1;
info.isInfo = -1;
info.isTracks = -1;
info.typemovie = "matroska"; // default
info.isDuration = -1; // ira stocker l'indice du bon élément de type info possédant cette propriété ! ( v6 )
// Stocke dans info.isEBML et info.isSegment les numéros (s'ils existent) des 2 branches correspondantes de la structure atoms
// Si l'une ou l'autre de ces 2 branches n'existait pas, info.isEBML et/ou info.isSegment resterait à la valeur -1
for (var k = 0; k < atoms.length; k++) {
if (atoms[k].name == "EBML") info.isEBML = k; // ascendance 0-0
if (atoms[k].name == "Segment") info.isSegment = k; // ascendance 0-1
}
// ... et donc l'une ou l'autre de ces deux boucles 'for' ne se réaliserait pas
// précise - en fait - le nombre de pistes correspondantes à Info et Tracks de la même manière que EBML et Segment ont été
// mis à jour dans info
for (var k = 0; k < atoms[info.isSegment].children.length; k++) {
if (atoms[info.isSegment].children[k].name == 'Info') {
info.isInfo = k;
// Il y-a-t-il duration ?
var tmpinfo = atoms[info.isSegment].children[k];
for (var nb=0; nb < tmpinfo.children.length; nb++){
if (tmpinfo.children[nb].name == 'Duration'){
info.isDuration = k;
info.dureeS = parseInt(tmpinfo.children[nb].value) / 1000; // seconds
}
}
}
if (atoms[info.isSegment].children[k].name == 'Tracks') info.isTracks = k;
}
// va rechercher, s'il existe, le DocType (normalement matroska ou webM) et met à jour l'information info.typemovie
// initialisée à matroska (au cas ou on serait en face d'un .webM)
for (var k = 0; k < atoms[info.isEBML].children.length; k++) {
if (atoms[info.isEBML].children[k].name == 'DocType') info.typemovie = atoms[info.isEBML].children[k].value;
}
// ATTENTION : présuppose que isSegment > -1 ainsi que isInfo > -1 mais, si tel est le cas, atominfo pointe sur
// l'atom correspondant ! Du coup met à jour dans info les 4 caractèristiques principales SI ELLES EXISTENT
var atominfo = atoms[info.isSegment].children[info.isInfo];
for (var k = 0; k < atominfo.children.length; k++) {
if (atominfo.children[k].name == 'WritingApp') info.Creator = atominfo.children[k].value;
if (atominfo.children[k].name == 'MuxingApp') info.WritingLibrary = atominfo.children[k].value;
//if (atominfo.children[k].name == 'Duration') info.dureeS = parseInt(atominfo.children[k].value) / 1000; // seconds
if (atominfo.children[k].name == 'SegmentUID') info.UID = atominfo.children[k].value;
}
// de la même manière, SI isSegment et isTrack sont > -1 ...
var atomtracks = atoms[info.isSegment].children[info.isTracks];
// Considère que les "trackEntry" ne peuvent être que filles de Tracks (puisque info.isTracks = k)
for (var k = 0; k < atomtracks.children.length; k++) {
if (atomtracks.children[k].name == "TrackEntry") {
var atomtrack = atomtracks.children[k];
var obj = {};
obj.default = 'Yes';
obj.forced = 'No';
for (var u = 0; u < atomtrack.children.length; u++) { // default
if (atomtrack.children[u].name == 'TrackNumber') obj.Id = atomtrack.children[u].value;
if (atomtrack.children[u].name == 'Language') obj.langage = atomtrack.children[u].value;
if (atomtrack.children[u].name == 'DefaultDuration') obj.ConstantFramerate = (1000000000 / atomtrack.children[u].value);
if (atomtrack.children[u].name == 'TrackType') {
if (atomtrack.children[u].value == 1) obj.typeEnt = 'Video';
if (atomtrack.children[u].value == 2) obj.typeEnt = 'Audio';
if (atomtrack.children[u].value == 3) obj.typeEnt = 'MuxedTrack';
if (atomtrack.children[u].value == 16) obj.typeEnt = 'Logo';
if (atomtrack.children[u].value == 17) obj.typeEnt = 'Subtitles';
if (atomtrack.children[u].value == 18) obj.typeEnt = 'Button';
if (atomtrack.children[u].value == 32) obj.typeEnt = 'Control';
}
if (atomtrack.children[u].name == 'FlagDefault' && atomtrack.children[u].value == 0) obj.default = "No";
if (atomtrack.children[u].name == 'FlagForced' && atomtrack.children[u].value == 1) obj.forced = "Yes";
if (atomtrack.children[u].name == 'Name') obj.name = atomtrack.children[u].value;
if (atomtrack.children[u].name == 'CodecID') obj.CodeC = atomtrack.children[u].value;
if (atomtrack.children[u].name == 'Video') {
var atomvideo = atomtrack.children[u];
for (var j = 0; j < atomvideo.children.length; j++) {
if (atomvideo.children[j].name == 'PixelWidth') obj.width = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'PixelHeight') obj.height = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'DisplayWidth') obj.Swidth = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'DisplayHeight') obj.Sheight = atomvideo.children[j].value;
}
}
if (atomtrack.children[u].name == 'Audio') {
var atomvideo = atomtrack.children[u];
for (var j = 0; j < atomvideo.children.length; j++) {
if (atomvideo.children[j].name == 'SamplingFrequency') obj.Freq = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'Channels') obj.nbChannels = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'BitDepth') obj.DepthBit = atomvideo.children[j].value;
if (atomvideo.children[j].name == 'DisplayHeight') obj.Sheight = atomvideo.children[j].value;
}
}
}
info.tracks.push(obj); // on n'enregistre une piste (track) QUE si c'en est une (trackEntry)
} // TrackEntry
} // boucle sur atomtracks.children.length
}
//console.log('nb lectures MKV = '+info.nbboucleslect);
fcb(null, info); // A priori le traitement est terminé : on renvoit info !
}; // fin de MKVebml.parse
/* -------------------------------------
Appel principal à la fonction "parse"
C'est ici aussi que l'on définit la
gestion des erreurs et le retour !
------------------------------------- */
MKVebml.parse(function(err, tags) {
fcb(err, tags);
});
}; // var mkv = function(opts, fcb){}
if (typeof module !== 'undefined' && module.exports) {
module.exports = mkv;
} else {
if (typeof define === 'function' && define.amd) {
define('mkv', [], function() {
return mkv;
});
}
}
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