File: MKVInfo.js

Recommend this page to a friend!
  Classes of Dantigny francois   Javascript MKV Parser   MKVInfo.js   Download  
File: MKVInfo.js
Role: Auxiliary script
Content type: text/plain
Description: Main class
Class: Javascript MKV Parser
JavaSParse and extract informationcript MKV Parser
Author: By
Last change: Update MKVInfo.js
Date: 8 months ago
Size: 44,025 bytes
 

Contents

Class file image Download
/** * 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; }); } }