typedef struct Elspec Elspec; struct Elspec {	vlong id;	char *name;	int type;}; enum {	/* ebml element value types */	Eunknown,	Emaster,	Ebinary,	Efloat,	Eunsigned,	Esigned,	Eunicode,	Eascii,	Etimestamp, 	/* known track types */	Etrackvideo = 1,	Etrackaudio = 2,	Etrackcomplex = 3,	Etracklogo = 16,	Etracksubtitles = 17,	Etrackbuttons = 18,	Etrackcontrol = 32,	Etrackmetadata = 33, 	/* ids */	EChapterDisplay = 0x80,	ETrackType = 0x83,	EChapString = 0x85,	ECodecID = 0x86,	EFlagDefault = 0x88,	EChapterTrackUID = 0x89,	ESlices = 0x8e,	EChapterTrack = 0x8f,	EChapterTimeStart = 0x91,	EChapterTimeEnd = 0x92,	ECueRefTime = 0x96,	ECueRefCluster = 0x97,	EChapterFlagHidden = 0x98,	EFlagInterlaced = 0x9a,	EBlockDuration = 0x9b,	EFlagLacing = 0x9c,	EFieldOrder = 0x9d,	EChannels = 0x9f,	EBlockGroup = 0xa0,	EBlock = 0xa1,	EBlockVirtual = 0xa2,	ESimpleBlock = 0xa3,	ECodecState = 0xa4,	EBlockAdditional = 0xa5,	EBlockMore = 0xa6,	EPosition = 0xa7,	ECodecDecodeAll = 0xaa,	EPrevSize = 0xab,	ETrackEntry = 0xae,	EEncryptedBlock = 0xaf,	EPixelWidth = 0xb0,	ECueDuration = 0xb2,	ECueTime = 0xb3,	ESamplingFrequency = 0xb5,	EChapterAtom = 0xb6,	ECueTrackPositions = 0xb7,	EFlagEnabled = 0xb9,	EPixelHeight = 0xba,	ECuePoint = 0xbb,	ECRC32 = 0xbf,	EReferenceFrame = 0xc8,	EReferenceOffset = 0xc9,	EReferenceTimestamp = 0xca,	EBlockAdditionID = 0xcb,	ELaceNumber = 0xcc,	EFrameNumber = 0xcd,	EDelay = 0xce,	ESliceDuration = 0xcf,	ETrackNumber = 0xd7,	ECueReference = 0xdb,	EVideo = 0xe0,	EAudio = 0xe1,	ETrackOperation = 0xe2,	ETrackCombinePlanes = 0xe3,	ETrackPlane = 0xe4,	ETrackPlaneUID = 0xe5,	ETrackPlaneType = 0xe6,	ETimestamp = 0xe7,	ETimeSlice = 0xe8,	ETrackJoinBlocks = 0xe9,	ECueCodecState = 0xea,	ECueRefCodecState = 0xeb,	EVoid = 0xec,	ETrackJoinUID = 0xed,	EBlockAddID = 0xee,	ECueRelativePosition = 0xf0,	ECueClusterPosition = 0xf1,	ECueTrack = 0xf7,	EReferencePriority = 0xfa,	EReferenceBlock = 0xfb,	EReferenceVirtual = 0xfd,	EBlockAddIDName = 0x41a4,	EBlockAdditionMapping = 0x41e4,	EBlockAddIDType = 0x41e7,	EBlockAddIDExtraData = 0x41ed,	EBlockAddIDValue = 0x41f0,	EContentCompAlgo = 0x4254,	EContentCompSettings = 0x4255,	EDocTypeExtension = 0x4281,	EDocType = 0x4282,	EDocTypeExtensionName = 0x4283,	EDocTypeExtensionVersion = 0x4284,	EDocTypeReadVersion = 0x4285,	EEBMLVersion = 0x4286,	EDocTypeVersion = 0x4287,	EEBMLMaxIDLength = 0x42f2,	EEBMLMaxSizeLength = 0x42f3,	EEBMLReadVersion = 0x42f7,	EChapLanguage = 0x437c,	EChapLanguageIETF = 0x437d,	EChapCountry = 0x437e,	ESegmentFamily = 0x4444,	EDateUTC = 0x4461,	ETagLanguage = 0x447a,	ETagLanguageIETF = 0x447b,	ETagDefault = 0x4484,	ETagBinary = 0x4485,	ETagString = 0x4487,	EDuration = 0x4489,	EChapProcessPrivate = 0x450d,	EChapterFlagEnabled = 0x4598,	ETagName = 0x45a3,	EEditionEntry = 0x45b9,	EEditionUID = 0x45bc,	EEditionFlagHidden = 0x45bd,	EEditionFlagDefault = 0x45db,	EEditionFlagOrdered = 0x45dd,	EFileData = 0x465c,	EFileMimeType = 0x4660,	EFileUsedStartTime = 0x4661,	EFileUsedEndTime = 0x4662,	EFileName = 0x466e,	EFileReferral = 0x4675,	EFileDescription = 0x467e,	EFileUID = 0x46ae,	EContentEncAlgo = 0x47e1,	EContentEncKeyID = 0x47e2,	EContentSignature = 0x47e3,	EContentSigKeyID = 0x47e4,	EContentSigAlgo = 0x47e5,	EContentSigHashAlgo = 0x47e6,	EContentAESSettings = 0x47e7,	EAESSettingsCipherMode = 0x47e8,	EMuxingApp = 0x4d80,	ESeek = 0x4dbb,	EContentEncodingOrder = 0x5031,	EContentEncodingScope = 0x5032,	EContentEncodingType = 0x5033,	EContentCompression = 0x5034,	EContentEncryption = 0x5035,	ECueRefNumber = 0x535f,	EName = 0x536e,	ECueBlockNumber = 0x5378,	ETrackOffset = 0x537f,	ESeekID = 0x53ab,	ESeekPosition = 0x53ac,	EStereoMode = 0x53b8,	EOldStereoMode = 0x53b9,	EAlphaMode = 0x53c0,	EPixelCropBottom = 0x54aa,	EDisplayWidth = 0x54b0,	EDisplayUnit = 0x54b2,	EAspectRatioType = 0x54b3,	EDisplayHeight = 0x54ba,	EPixelCropTop = 0x54bb,	EPixelCropLeft = 0x54cc,	EPixelCropRight = 0x54dd,	EFlagForced = 0x55aa,	EColour = 0x55b0,	EMatrixCoefficients = 0x55b1,	EBitsPerChannel = 0x55b2,	EChromaSubsamplingHorz = 0x55b3,	EChromaSubsamplingVert = 0x55b4,	ECbSubSamplingHorz = 0x55b5,	ECbSubSamplingVert = 0x55b6,	EChromaSitingHorz = 0x55b7,	EChromaSitingVert = 0x55b8,	ERange = 0x55b9,	ETransferCharacteristics = 0x55ba,	EPrimaries = 0x55bb,	EMaxCLL = 0x55bc,	EMaxFALL = 0x55bd,	EMasteringMetadata = 0x55d0,	EPrimaryRChromaticityX = 0x55d1,	EPrimaryRChromaticityY = 0x55d2,	EPrimaryGChromaticityX = 0x55d3,	EPrimaryGChromaticityY = 0x55d4,	EPrimaryBChromaticityX = 0x55d5,	EPrimaryBChromaticityY = 0x55d6,	EWhitePointChromaticityX = 0x55d7,	EWhitePointChromaticityY = 0x55d8,	ELuminanceMax = 0x55d9,	ELuminanceMin = 0x55da,	EMaxBlockAdditionID = 0x55ee,	EChapterStringUID = 0x5654,	ECodecDelay = 0x56aa,	ESeekPreRoll = 0x56bb,	EWritingApp = 0x5741,	ESilentTracks = 0x5854,	ESilentTrackNumber = 0x58d7,	EAttachedFile = 0x61a7,	EContentEncoding = 0x6240,	EBitDepth = 0x6264,	ECodecPrivate = 0x63a2,	ETargets = 0x63c0,	EChapterPhysicalEquiv = 0x63c3,	ETagChapterUID = 0x63c4,	ETagTrackUID = 0x63c5,	ETagAttachmentUID = 0x63c6,	ETagEditionUID = 0x63c9,	ETargetType = 0x63ca,	ETrackTranslate = 0x6624,	ETrackTranslateTrackID = 0x66a5,	ETrackTranslateCodec = 0x66bf,	ETrackTranslateEditionUID = 0x66fc,	ESimpleTag = 0x67c8,	ETargetTypeValue = 0x68ca,	EChapProcessCommand = 0x6911,	EChapProcessTime = 0x6922,	EChapterTranslate = 0x6924,	EChapProcessData = 0x6933,	EChapProcess = 0x6944,	EChapProcessCodecID = 0x6955,	EChapterTranslateID = 0x69a5,	EChapterTranslateCodec = 0x69bf,	EChapterTranslateEditionUID = 0x69fc,	EContentEncodings = 0x6d80,	EMinCache = 0x6de7,	EMaxCache = 0x6df8,	EChapterSegmentUID = 0x6e67,	EChapterSegmentEditionUID = 0x6ebc,	ETrackOverlay = 0x6fab,	ETag = 0x7373,	ESegmentFilename = 0x7384,	ESegmentUID = 0x73a4,	EChapterUID = 0x73c4,	ETrackUID = 0x73c5,	EAttachmentLink = 0x7446,	EBlockAdditions = 0x75a1,	EDiscardPadding = 0x75a2,	EProjection = 0x7670,	EProjectionType = 0x7671,	EProjectionPrivate = 0x7672,	EProjectionPoseYaw = 0x7673,	EProjectionPosePitch = 0x7674,	EProjectionPoseRoll = 0x7675,	EOutputSamplingFrequency = 0x78b5,	ETitle = 0x7ba9,	EChannelPositions = 0x7d7b,	ELanguage = 0x22b59c,	ELanguageIETF = 0x22b59d,	ETrackTimestampScale = 0x23314f,	EDefaultDecodedFieldDuration = 0x234e7a,	EFrameRate = 0x2383e3,	EDefaultDuration = 0x23e383,	ECodecName = 0x258688,	ECodecDownloadURL = 0x26b240,	ETimestampScale = 0x2ad7b1,	EColourSpace = 0x2eb524,	EGammaValue = 0x2fb523,	ECodecSettings = 0x3a9697,	ECodecInfoURL = 0x3b4040,	EPrevFilename = 0x3c83ab,	EPrevUID = 0x3cb923,	ENextFilename = 0x3e83bb,	ENextUID = 0x3eb923,	EChapters = 0x1043a770,	ESeekHead = 0x114d9b74,	ETags = 0x1254c367,	EInfo = 0x1549a966,	ETracks = 0x1654ae6b,	ESegment = 0x18538067,	EAttachments = 0x1941a469,	EEBML = 0x1a45dfa3,	ECues = 0x1c53bb6b,	ECluster = 0x1f43b675,}; int ebmluintb(u8int *b, vlong sz, vlong *out);int ebmlsintb(u8int *b, vlong sz, vlong *out);int ebmluint(Biobuf *f, vlong sz, vlong *out);int ebmlsint(Biobuf *f, vlong sz, vlong *out);int ebmlfloat(Biobuf *f, vlong sz, double *out);vlong ebmlel(Biobuf *f, vlong sz, Elspec *el, vlong *esz);vlong ebmlrawuint(Biobuf *f, vlong sz, vlong *dst);vlong ebmlrawsint(Biobuf *f, vlong sz, vlong *dst);char *ebmltracktype(int t);