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315 KiB
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1 line
No EOL
315 KiB
Text
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eslint-env node */\n'use strict';\n\n// SDP helpers.\nconst SDPUtils = {};\n\n// Generate an alphanumeric identifier for cname or mids.\n// TODO: use UUIDs instead? https://gist.github.com/jed/982883\nSDPUtils.generateIdentifier = function() {\n return Math.random().toString(36).substring(2, 12);\n};\n\n// The RTCP CNAME used by all peerconnections from the same JS.\nSDPUtils.localCName = SDPUtils.generateIdentifier();\n\n// Splits SDP into lines, dealing with both CRLF and LF.\nSDPUtils.splitLines = function(blob) {\n return blob.trim().split('\\n').map(line => line.trim());\n};\n// Splits SDP into sessionpart and mediasections. Ensures CRLF.\nSDPUtils.splitSections = function(blob) {\n const parts = blob.split('\\nm=');\n return parts.map((part, index) => (index > 0 ?\n 'm=' + part : part).trim() + '\\r\\n');\n};\n\n// Returns the session description.\nSDPUtils.getDescription = function(blob) {\n const sections = SDPUtils.splitSections(blob);\n return sections && sections[0];\n};\n\n// Returns the individual media sections.\nSDPUtils.getMediaSections = function(blob) {\n const sections = SDPUtils.splitSections(blob);\n sections.shift();\n return sections;\n};\n\n// Returns lines that start with a certain prefix.\nSDPUtils.matchPrefix = function(blob, prefix) {\n return SDPUtils.splitLines(blob).filter(line => line.indexOf(prefix) === 0);\n};\n\n// Parses an ICE candidate line. Sample input:\n// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8\n// rport 55996\"\n// Input can be prefixed with a=.\nSDPUtils.parseCandidate = function(line) {\n let parts;\n // Parse both variants.\n if (line.indexOf('a=candidate:') === 0) {\n parts = line.substring(12).split(' ');\n } else {\n parts = line.substring(10).split(' ');\n }\n\n const candidate = {\n foundation: parts[0],\n component: {1: 'rtp', 2: 'rtcp'}[parts[1]] || parts[1],\n protocol: parts[2].toLowerCase(),\n priority: parseInt(parts[3], 10),\n ip: parts[4],\n address: parts[4], // address is an alias for ip.\n port: parseInt(parts[5], 10),\n // skip parts[6] == 'typ'\n type: parts[7],\n };\n\n for (let i = 8; i < parts.length; i += 2) {\n switch (parts[i]) {\n case 'raddr':\n candidate.relatedAddress = parts[i + 1];\n break;\n case 'rport':\n candidate.relatedPort = parseInt(parts[i + 1], 10);\n break;\n case 'tcptype':\n candidate.tcpType = parts[i + 1];\n break;\n case 'ufrag':\n candidate.ufrag = parts[i + 1]; // for backward compatibility.\n candidate.usernameFragment = parts[i + 1];\n break;\n default: // extension handling, in particular ufrag. Don't overwrite.\n if (candidate[parts[i]] === undefined) {\n candidate[parts[i]] = parts[i + 1];\n }\n break;\n }\n }\n return candidate;\n};\n\n// Translates a candidate object into SDP candidate attribute.\n// This does not include the a= prefix!\nSDPUtils.writeCandidate = function(candidate) {\n const sdp = [];\n sdp.push(candidate.foundation);\n\n const component = candidate.component;\n if (component === 'rtp') {\n sdp.push(1);\n } else if (component === 'rtcp') {\n sdp.push(2);\n } else {\n sdp.push(component);\n }\n sdp.push(candidate.protocol.toUpperCase());\n sdp.push(candidate.priority);\n sdp.push(candidate.address || candidate.ip);\n sdp.push(candidate.port);\n\n const type = candidate.type;\n sdp.push('typ');\n sdp.push(type);\n if (type !== 'host' && candidate.relatedAddress &&\n candidate.relatedPort) {\n sdp.push('raddr');\n sdp.push(candidate.relatedAddress);\n sdp.push('rport');\n sdp.push(candidate.relatedPort);\n }\n if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {\n sdp.push('tcptype');\n sdp.push(candidate.tcpType);\n }\n if (candidate.usernameFragment || candidate.ufrag) {\n sdp.push('ufrag');\n sdp.push(candidate.usernameFragment || candidate.ufrag);\n }\n return 'candidate:' + sdp.join(' ');\n};\n\n// Parses an ice-options line, returns an array of option tags.\n// Sample input:\n// a=ice-options:foo bar\nSDPUtils.parseIceOptions = function(line) {\n return line.substring(14).split(' ');\n};\n\n// Parses a rtpmap line, returns RTCRtpCoddecParameters. Sample input:\n// a=rtpmap:111 opus/48000/2\nSDPUtils.parseRtpMap = function(line) {\n let parts = line.substring(9).split(' ');\n const parsed = {\n payloadType: parseInt(parts.shift(), 10), // was: id\n };\n\n parts = parts[0].split('/');\n\n parsed.name = parts[0];\n parsed.clockRate = parseInt(parts[1], 10); // was: clockrate\n parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;\n // legacy alias, got renamed back to channels in ORTC.\n parsed.numChannels = parsed.channels;\n return parsed;\n};\n\n// Generates a rtpmap line from RTCRtpCodecCapability or\n// RTCRtpCodecParameters.\nSDPUtils.writeRtpMap = function(codec) {\n let pt = codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n const channels = codec.channels || codec.numChannels || 1;\n return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +\n (channels !== 1 ? '/' + channels : '') + '\\r\\n';\n};\n\n// Parses a extmap line (headerextension from RFC 5285). Sample input:\n// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\n// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset\nSDPUtils.parseExtmap = function(line) {\n const parts = line.substring(9).split(' ');\n return {\n id: parseInt(parts[0], 10),\n direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',\n uri: parts[1],\n attributes: parts.slice(2).join(' '),\n };\n};\n\n// Generates an extmap line from RTCRtpHeaderExtensionParameters or\n// RTCRtpHeaderExtension.\nSDPUtils.writeExtmap = function(headerExtension) {\n return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +\n (headerExtension.direction && headerExtension.direction !== 'sendrecv'\n ? '/' + headerExtension.direction\n : '') +\n ' ' + headerExtension.uri +\n (headerExtension.attributes ? ' ' + headerExtension.attributes : '') +\n '\\r\\n';\n};\n\n// Parses a fmtp line, returns dictionary. Sample input:\n// a=fmtp:96 vbr=on;cng=on\n// Also deals with vbr=on; cng=on\nSDPUtils.parseFmtp = function(line) {\n const parsed = {};\n let kv;\n const parts = line.substring(line.indexOf(' ') + 1).split(';');\n for (let j = 0; j < parts.length; j++) {\n kv = parts[j].trim().split('=');\n parsed[kv[0].trim()] = kv[1];\n }\n return parsed;\n};\n\n// Generates a fmtp line from RTCRtpCodecCapability or RTCRtpCodecParameters.\nSDPUtils.writeFmtp = function(codec) {\n let line = '';\n let pt = codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n if (codec.parameters && Object.keys(codec.parameters).length) {\n const params = [];\n Object.keys(codec.parameters).forEach(param => {\n if (codec.parameters[param] !== undefined) {\n params.push(param + '=' + codec.parameters[param]);\n } else {\n params.push(param);\n }\n });\n line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\\r\\n';\n }\n return line;\n};\n\n// Parses a rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:\n// a=rtcp-fb:98 nack rpsi\nSDPUtils.parseRtcpFb = function(line) {\n const parts = line.substring(line.indexOf(' ') + 1).split(' ');\n return {\n type: parts.shift(),\n parameter: parts.join(' '),\n };\n};\n\n// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.\nSDPUtils.writeRtcpFb = function(codec) {\n let lines = '';\n let pt = codec.payloadType;\n if (codec.preferredPayloadType !== undefined) {\n pt = codec.preferredPayloadType;\n }\n if (codec.rtcpFeedback && codec.rtcpFeedback.length) {\n // FIXME: special handling for trr-int?\n codec.rtcpFeedback.forEach(fb => {\n lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +\n (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +\n '\\r\\n';\n });\n }\n return lines;\n};\n\n// Parses a RFC 5576 ssrc media attribute. Sample input:\n// a=ssrc:3735928559 cname:something\nSDPUtils.parseSsrcMedia = function(line) {\n const sp = line.indexOf(' ');\n const parts = {\n ssrc: parseInt(line.substring(7, sp), 10),\n };\n const colon = line.indexOf(':', sp);\n if (colon > -1) {\n parts.attribute = line.substring(sp + 1, colon);\n parts.value = line.substring(colon + 1);\n } else {\n parts.attribute = line.substring(sp + 1);\n }\n return parts;\n};\n\n// Parse a ssrc-group line (see RFC 5576). Sample input:\n// a=ssrc-group:semantics 12 34\nSDPUtils.parseSsrcGroup = function(line) {\n const parts = line.substring(13).split(' ');\n return {\n semantics: parts.shift(),\n ssrcs: parts.map(ssrc => parseInt(ssrc, 10)),\n };\n};\n\n// Extracts the MID (RFC 5888) from a media section.\n// Returns the MID or undefined if no mid line was found.\nSDPUtils.getMid = function(mediaSection) {\n const mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];\n if (mid) {\n return mid.substring(6);\n }\n};\n\n// Parses a fingerprint line for DTLS-SRTP.\nSDPUtils.parseFingerprint = function(line) {\n const parts = line.substring(14).split(' ');\n return {\n algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.\n value: parts[1].toUpperCase(), // the definition is upper-case in RFC 4572.\n };\n};\n\n// Extracts DTLS parameters from SDP media section or sessionpart.\n// FIXME: for consistency with other functions this should only\n// get the fingerprint line as input. See also getIceParameters.\nSDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {\n const lines = SDPUtils.matchPrefix(mediaSection + sessionpart,\n 'a=fingerprint:');\n // Note: a=setup line is ignored since we use the 'auto' role in Edge.\n return {\n role: 'auto',\n fingerprints: lines.map(SDPUtils.parseFingerprint),\n };\n};\n\n// Serializes DTLS parameters to SDP.\nSDPUtils.writeDtlsParameters = function(params, setupType) {\n let sdp = 'a=setup:' + setupType + '\\r\\n';\n params.fingerprints.forEach(fp => {\n sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\\r\\n';\n });\n return sdp;\n};\n\n// Parses a=crypto lines into\n// https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members\nSDPUtils.parseCryptoLine = function(line) {\n const parts = line.substring(9).split(' ');\n return {\n tag: parseInt(parts[0], 10),\n cryptoSuite: parts[1],\n keyParams: parts[2],\n sessionParams: parts.slice(3),\n };\n};\n\nSDPUtils.writeCryptoLine = function(parameters) {\n return 'a=crypto:' + parameters.tag + ' ' +\n parameters.cryptoSuite + ' ' +\n (typeof parameters.keyParams === 'object'\n ? SDPUtils.writeCryptoKeyParams(parameters.keyParams)\n : parameters.keyParams) +\n (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') +\n '\\r\\n';\n};\n\n// Parses the crypto key parameters into\n// https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*\nSDPUtils.parseCryptoKeyParams = function(keyParams) {\n if (keyParams.indexOf('inline:') !== 0) {\n return null;\n }\n const parts = keyParams.substring(7).split('|');\n return {\n keyMethod: 'inline',\n keySalt: parts[0],\n lifeTime: parts[1],\n mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,\n mkiLength: parts[2] ? parts[2].split(':')[1] : undefined,\n };\n};\n\nSDPUtils.writeCryptoKeyParams = function(keyParams) {\n return keyParams.keyMethod + ':'\n + keyParams.keySalt +\n (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') +\n (keyParams.mkiValue && keyParams.mkiLength\n ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength\n : '');\n};\n\n// Extracts all SDES parameters.\nSDPUtils.getCryptoParameters = function(mediaSection, sessionpart) {\n const lines = SDPUtils.matchPrefix(mediaSection + sessionpart,\n 'a=crypto:');\n return lines.map(SDPUtils.parseCryptoLine);\n};\n\n// Parses ICE information from SDP media section or sessionpart.\n// FIXME: for consistency with other functions this should only\n// get the ice-ufrag and ice-pwd lines as input.\nSDPUtils.getIceParameters = function(mediaSection, sessionpart) {\n const ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart,\n 'a=ice-ufrag:')[0];\n const pwd = SDPUtils.matchPrefix(mediaSection + sessionpart,\n 'a=ice-pwd:')[0];\n if (!(ufrag && pwd)) {\n return null;\n }\n return {\n usernameFragment: ufrag.substring(12),\n password: pwd.substring(10),\n };\n};\n\n// Serializes ICE parameters to SDP.\nSDPUtils.writeIceParameters = function(params) {\n let sdp = 'a=ice-ufrag:' + params.usernameFragment + '\\r\\n' +\n 'a=ice-pwd:' + params.password + '\\r\\n';\n if (params.iceLite) {\n sdp += 'a=ice-lite\\r\\n';\n }\n return sdp;\n};\n\n// Parses the SDP media section and returns RTCRtpParameters.\nSDPUtils.parseRtpParameters = function(mediaSection) {\n const description = {\n codecs: [],\n headerExtensions: [],\n fecMechanisms: [],\n rtcp: [],\n };\n const lines = SDPUtils.splitLines(mediaSection);\n const mline = lines[0].split(' ');\n description.profile = mline[2];\n for (let i = 3; i < mline.length; i++) { // find all codecs from mline[3..]\n const pt = mline[i];\n const rtpmapline = SDPUtils.matchPrefix(\n mediaSection, 'a=rtpmap:' + pt + ' ')[0];\n if (rtpmapline) {\n const codec = SDPUtils.parseRtpMap(rtpmapline);\n const fmtps = SDPUtils.matchPrefix(\n mediaSection, 'a=fmtp:' + pt + ' ');\n // Only the first a=fmtp:<pt> is considered.\n codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};\n codec.rtcpFeedback = SDPUtils.matchPrefix(\n mediaSection, 'a=rtcp-fb:' + pt + ' ')\n .map(SDPUtils.parseRtcpFb);\n description.codecs.push(codec);\n // parse FEC mechanisms from rtpmap lines.\n switch (codec.name.toUpperCase()) {\n case 'RED':\n case 'ULPFEC':\n description.fecMechanisms.push(codec.name.toUpperCase());\n break;\n default: // only RED and ULPFEC are recognized as FEC mechanisms.\n break;\n }\n }\n }\n SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(line => {\n description.headerExtensions.push(SDPUtils.parseExtmap(line));\n });\n const wildcardRtcpFb = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-fb:* ')\n .map(SDPUtils.parseRtcpFb);\n description.codecs.forEach(codec => {\n wildcardRtcpFb.forEach(fb=> {\n const duplicate = codec.rtcpFeedback.find(existingFeedback => {\n return existingFeedback.type === fb.type &&\n existingFeedback.parameter === fb.parameter;\n });\n if (!duplicate) {\n codec.rtcpFeedback.push(fb);\n }\n });\n });\n // FIXME: parse rtcp.\n return description;\n};\n\n// Generates parts of the SDP media section describing the capabilities /\n// parameters.\nSDPUtils.writeRtpDescription = function(kind, caps) {\n let sdp = '';\n\n // Build the mline.\n sdp += 'm=' + kind + ' ';\n sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.\n sdp += ' ' + (caps.profile || 'UDP/TLS/RTP/SAVPF') + ' ';\n sdp += caps.codecs.map(codec => {\n if (codec.preferredPayloadType !== undefined) {\n return codec.preferredPayloadType;\n }\n return codec.payloadType;\n }).join(' ') + '\\r\\n';\n\n sdp += 'c=IN IP4 0.0.0.0\\r\\n';\n sdp += 'a=rtcp:9 IN IP4 0.0.0.0\\r\\n';\n\n // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.\n caps.codecs.forEach(codec => {\n sdp += SDPUtils.writeRtpMap(codec);\n sdp += SDPUtils.writeFmtp(codec);\n sdp += SDPUtils.writeRtcpFb(codec);\n });\n let maxptime = 0;\n caps.codecs.forEach(codec => {\n if (codec.maxptime > maxptime) {\n maxptime = codec.maxptime;\n }\n });\n if (maxptime > 0) {\n sdp += 'a=maxptime:' + maxptime + '\\r\\n';\n }\n\n if (caps.headerExtensions) {\n caps.headerExtensions.forEach(extension => {\n sdp += SDPUtils.writeExtmap(extension);\n });\n }\n // FIXME: write fecMechanisms.\n return sdp;\n};\n\n// Parses the SDP media section and returns an array of\n// RTCRtpEncodingParameters.\nSDPUtils.parseRtpEncodingParameters = function(mediaSection) {\n const encodingParameters = [];\n const description = SDPUtils.parseRtpParameters(mediaSection);\n const hasRed = description.fecMechanisms.indexOf('RED') !== -1;\n const hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;\n\n // filter a=ssrc:... cname:, ignore PlanB-msid\n const ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')\n .map(line => SDPUtils.parseSsrcMedia(line))\n .filter(parts => parts.attribute === 'cname');\n const primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;\n let secondarySsrc;\n\n const flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')\n .map(line => {\n const parts = line.substring(17).split(' ');\n return parts.map(part => parseInt(part, 10));\n });\n if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {\n secondarySsrc = flows[0][1];\n }\n\n description.codecs.forEach(codec => {\n if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {\n let encParam = {\n ssrc: primarySsrc,\n codecPayloadType: parseInt(codec.parameters.apt, 10),\n };\n if (primarySsrc && secondarySsrc) {\n encParam.rtx = {ssrc: secondarySsrc};\n }\n encodingParameters.push(encParam);\n if (hasRed) {\n encParam = JSON.parse(JSON.stringify(encParam));\n encParam.fec = {\n ssrc: primarySsrc,\n mechanism: hasUlpfec ? 'red+ulpfec' : 'red',\n };\n encodingParameters.push(encParam);\n }\n }\n });\n if (encodingParameters.length === 0 && primarySsrc) {\n encodingParameters.push({\n ssrc: primarySsrc,\n });\n }\n\n // we support both b=AS and b=TIAS but interpret AS as TIAS.\n let bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');\n if (bandwidth.length) {\n if (bandwidth[0].indexOf('b=TIAS:') === 0) {\n bandwidth = parseInt(bandwidth[0].substring(7), 10);\n } else if (bandwidth[0].indexOf('b=AS:') === 0) {\n // use formula from JSEP to convert b=AS to TIAS value.\n bandwidth = parseInt(bandwidth[0].substring(5), 10) * 1000 * 0.95\n - (50 * 40 * 8);\n } else {\n bandwidth = undefined;\n }\n encodingParameters.forEach(params => {\n params.maxBitrate = bandwidth;\n });\n }\n return encodingParameters;\n};\n\n// parses http://draft.ortc.org/#rtcrtcpparameters*\nSDPUtils.parseRtcpParameters = function(mediaSection) {\n const rtcpParameters = {};\n\n // Gets the first SSRC. Note that with RTX there might be multiple\n // SSRCs.\n const remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')\n .map(line => SDPUtils.parseSsrcMedia(line))\n .filter(obj => obj.attribute === 'cname')[0];\n if (remoteSsrc) {\n rtcpParameters.cname = remoteSsrc.value;\n rtcpParameters.ssrc = remoteSsrc.ssrc;\n }\n\n // Edge uses the compound attribute instead of reducedSize\n // compound is !reducedSize\n const rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');\n rtcpParameters.reducedSize = rsize.length > 0;\n rtcpParameters.compound = rsize.length === 0;\n\n // parses the rtcp-mux attrіbute.\n // Note that Edge does not support unmuxed RTCP.\n const mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');\n rtcpParameters.mux = mux.length > 0;\n\n return rtcpParameters;\n};\n\nSDPUtils.writeRtcpParameters = function(rtcpParameters) {\n let sdp = '';\n if (rtcpParameters.reducedSize) {\n sdp += 'a=rtcp-rsize\\r\\n';\n }\n if (rtcpParameters.mux) {\n sdp += 'a=rtcp-mux\\r\\n';\n }\n if (rtcpParameters.ssrc !== undefined && rtcpParameters.cname) {\n sdp += 'a=ssrc:' + rtcpParameters.ssrc +\n ' cname:' + rtcpParameters.cname + '\\r\\n';\n }\n return sdp;\n};\n\n\n// parses either a=msid: or a=ssrc:... msid lines and returns\n// the id of the MediaStream and MediaStreamTrack.\nSDPUtils.parseMsid = function(mediaSection) {\n let parts;\n const spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');\n if (spec.length === 1) {\n parts = spec[0].substring(7).split(' ');\n return {stream: parts[0], track: parts[1]};\n }\n const planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')\n .map(line => SDPUtils.parseSsrcMedia(line))\n .filter(msidParts => msidParts.attribute === 'msid');\n if (planB.length > 0) {\n parts = planB[0].value.split(' ');\n return {stream: parts[0], track: parts[1]};\n }\n};\n\n// SCTP\n// parses draft-ietf-mmusic-sctp-sdp-26 first and falls back\n// to draft-ietf-mmusic-sctp-sdp-05\nSDPUtils.parseSctpDescription = function(mediaSection) {\n const mline = SDPUtils.parseMLine(mediaSection);\n const maxSizeLine = SDPUtils.matchPrefix(mediaSection, 'a=max-message-size:');\n let maxMessageSize;\n if (maxSizeLine.length > 0) {\n maxMessageSize = parseInt(maxSizeLine[0].substring(19), 10);\n }\n if (isNaN(maxMessageSize)) {\n maxMessageSize = 65536;\n }\n const sctpPort = SDPUtils.matchPrefix(mediaSection, 'a=sctp-port:');\n if (sctpPort.length > 0) {\n return {\n port: parseInt(sctpPort[0].substring(12), 10),\n protocol: mline.fmt,\n maxMessageSize,\n };\n }\n const sctpMapLines = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:');\n if (sctpMapLines.length > 0) {\n const parts = sctpMapLines[0]\n .substring(10)\n .split(' ');\n return {\n port: parseInt(parts[0], 10),\n protocol: parts[1],\n maxMessageSize,\n };\n }\n};\n\n// SCTP\n// outputs the draft-ietf-mmusic-sctp-sdp-26 version that all browsers\n// support by now receiving in this format, unless we originally parsed\n// as the draft-ietf-mmusic-sctp-sdp-05 format (indicated by the m-line\n// protocol of DTLS/SCTP -- without UDP/ or TCP/)\nSDPUtils.writeSctpDescription = function(media, sctp) {\n let output = [];\n if (media.protocol !== 'DTLS/SCTP') {\n output = [\n 'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.protocol + '\\r\\n',\n 'c=IN IP4 0.0.0.0\\r\\n',\n 'a=sctp-port:' + sctp.port + '\\r\\n',\n ];\n } else {\n output = [\n 'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.port + '\\r\\n',\n 'c=IN IP4 0.0.0.0\\r\\n',\n 'a=sctpmap:' + sctp.port + ' ' + sctp.protocol + ' 65535\\r\\n',\n ];\n }\n if (sctp.maxMessageSize !== undefined) {\n output.push('a=max-message-size:' + sctp.maxMessageSize + '\\r\\n');\n }\n return output.join('');\n};\n\n// Generate a session ID for SDP.\n// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1\n// recommends using a cryptographically random +ve 64-bit value\n// but right now this should be acceptable and within the right range\nSDPUtils.generateSessionId = function() {\n return Math.random().toString().substr(2, 22);\n};\n\n// Write boiler plate for start of SDP\n// sessId argument is optional - if not supplied it will\n// be generated randomly\n// sessVersion is optional and defaults to 2\n// sessUser is optional and defaults to 'thisisadapterortc'\nSDPUtils.writeSessionBoilerplate = function(sessId, sessVer, sessUser) {\n let sessionId;\n const version = sessVer !== undefined ? sessVer : 2;\n if (sessId) {\n sessionId = sessId;\n } else {\n sessionId = SDPUtils.generateSessionId();\n }\n const user = sessUser || 'thisisadapterortc';\n // FIXME: sess-id should be an NTP timestamp.\n return 'v=0\\r\\n' +\n 'o=' + user + ' ' + sessionId + ' ' + version +\n ' IN IP4 127.0.0.1\\r\\n' +\n 's=-\\r\\n' +\n 't=0 0\\r\\n';\n};\n\n// Gets the direction from the mediaSection or the sessionpart.\nSDPUtils.getDirection = function(mediaSection, sessionpart) {\n // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.\n const lines = SDPUtils.splitLines(mediaSection);\n for (let i = 0; i < lines.length; i++) {\n switch (lines[i]) {\n case 'a=sendrecv':\n case 'a=sendonly':\n case 'a=recvonly':\n case 'a=inactive':\n return lines[i].substring(2);\n default:\n // FIXME: What should happen here?\n }\n }\n if (sessionpart) {\n return SDPUtils.getDirection(sessionpart);\n }\n return 'sendrecv';\n};\n\nSDPUtils.getKind = function(mediaSection) {\n const lines = SDPUtils.splitLines(mediaSection);\n const mline = lines[0].split(' ');\n return mline[0].substring(2);\n};\n\nSDPUtils.isRejected = function(mediaSection) {\n return mediaSection.split(' ', 2)[1] === '0';\n};\n\nSDPUtils.parseMLine = function(mediaSection) {\n const lines = SDPUtils.splitLines(mediaSection);\n const parts = lines[0].substring(2).split(' ');\n return {\n kind: parts[0],\n port: parseInt(parts[1], 10),\n protocol: parts[2],\n fmt: parts.slice(3).join(' '),\n };\n};\n\nSDPUtils.parseOLine = function(mediaSection) {\n const line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];\n const parts = line.substring(2).split(' ');\n return {\n username: parts[0],\n sessionId: parts[1],\n sessionVersion: parseInt(parts[2], 10),\n netType: parts[3],\n addressType: parts[4],\n address: parts[5],\n };\n};\n\n// a very naive interpretation of a valid SDP.\nSDPUtils.isValidSDP = function(blob) {\n if (typeof blob !== 'string' || blob.length === 0) {\n return false;\n }\n const lines = SDPUtils.splitLines(blob);\n for (let i = 0; i < lines.length; i++) {\n if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {\n return false;\n }\n // TODO: check the modifier a bit more.\n }\n return true;\n};\n\n// Expose public methods.\nif (typeof module === 'object') {\n module.exports = SDPUtils;\n}\n","// The module cache\nvar __webpack_module_cache__ = {};\n\n// The require function\nfunction __webpack_require__(moduleId) {\n\t// Check if module is in cache\n\tvar cachedModule = __webpack_module_cache__[moduleId];\n\tif (cachedModule !== undefined) {\n\t\treturn cachedModule.exports;\n\t}\n\t// Create a new module (and put it into the cache)\n\tvar module = __webpack_module_cache__[moduleId] = {\n\t\t// no module.id needed\n\t\t// no module.loaded needed\n\t\texports: {}\n\t};\n\n\t// Execute the module function\n\t__webpack_modules__[moduleId](module, module.exports, __webpack_require__);\n\n\t// Return the exports of the module\n\treturn module.exports;\n}\n\n","// getDefaultExport function for compatibility with non-harmony modules\n__webpack_require__.n = (module) => {\n\tvar getter = module && module.__esModule ?\n\t\t() => (module['default']) :\n\t\t() => (module);\n\t__webpack_require__.d(getter, { a: getter });\n\treturn getter;\n};","// define getter functions for harmony exports\n__webpack_require__.d = (exports, definition) => {\n\tfor(var key in definition) {\n\t\tif(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {\n\t\t\tObject.defineProperty(exports, key, { enumerable: true, get: definition[key] });\n\t\t}\n\t}\n};","__webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))","// define __esModule on exports\n__webpack_require__.r = (exports) => {\n\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n\t}\n\tObject.defineProperty(exports, '__esModule', { value: true });\n};","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nlet logDisabled_ = true;\nlet deprecationWarnings_ = true;\n\n/**\n * Extract browser version out of the provided user agent string.\n *\n * @param {!string} uastring userAgent string.\n * @param {!string} expr Regular expression used as match criteria.\n * @param {!number} pos position in the version string to be returned.\n * @return {!number} browser version.\n */\nexport function extractVersion(uastring, expr, pos) {\n const match = uastring.match(expr);\n return match && match.length >= pos && parseInt(match[pos], 10);\n}\n\n// Wraps the peerconnection event eventNameToWrap in a function\n// which returns the modified event object (or false to prevent\n// the event).\nexport function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {\n if (!window.RTCPeerConnection) {\n return;\n }\n const proto = window.RTCPeerConnection.prototype;\n const nativeAddEventListener = proto.addEventListener;\n proto.addEventListener = function(nativeEventName, cb) {\n if (nativeEventName !== eventNameToWrap) {\n return nativeAddEventListener.apply(this, arguments);\n }\n const wrappedCallback = (e) => {\n const modifiedEvent = wrapper(e);\n if (modifiedEvent) {\n if (cb.handleEvent) {\n cb.handleEvent(modifiedEvent);\n } else {\n cb(modifiedEvent);\n }\n }\n };\n this._eventMap = this._eventMap || {};\n if (!this._eventMap[eventNameToWrap]) {\n this._eventMap[eventNameToWrap] = new Map();\n }\n this._eventMap[eventNameToWrap].set(cb, wrappedCallback);\n return nativeAddEventListener.apply(this, [nativeEventName,\n wrappedCallback]);\n };\n\n const nativeRemoveEventListener = proto.removeEventListener;\n proto.removeEventListener = function(nativeEventName, cb) {\n if (nativeEventName !== eventNameToWrap || !this._eventMap\n || !this._eventMap[eventNameToWrap]) {\n return nativeRemoveEventListener.apply(this, arguments);\n }\n if (!this._eventMap[eventNameToWrap].has(cb)) {\n return nativeRemoveEventListener.apply(this, arguments);\n }\n const unwrappedCb = this._eventMap[eventNameToWrap].get(cb);\n this._eventMap[eventNameToWrap].delete(cb);\n if (this._eventMap[eventNameToWrap].size === 0) {\n delete this._eventMap[eventNameToWrap];\n }\n if (Object.keys(this._eventMap).length === 0) {\n delete this._eventMap;\n }\n return nativeRemoveEventListener.apply(this, [nativeEventName,\n unwrappedCb]);\n };\n\n Object.defineProperty(proto, 'on' + eventNameToWrap, {\n get() {\n return this['_on' + eventNameToWrap];\n },\n set(cb) {\n if (this['_on' + eventNameToWrap]) {\n this.removeEventListener(eventNameToWrap,\n this['_on' + eventNameToWrap]);\n delete this['_on' + eventNameToWrap];\n }\n if (cb) {\n this.addEventListener(eventNameToWrap,\n this['_on' + eventNameToWrap] = cb);\n }\n },\n enumerable: true,\n configurable: true\n });\n}\n\nexport function disableLog(bool) {\n if (typeof bool !== 'boolean') {\n return new Error('Argument type: ' + typeof bool +\n '. Please use a boolean.');\n }\n logDisabled_ = bool;\n return (bool) ? 'adapter.js logging disabled' :\n 'adapter.js logging enabled';\n}\n\n/**\n * Disable or enable deprecation warnings\n * @param {!boolean} bool set to true to disable warnings.\n */\nexport function disableWarnings(bool) {\n if (typeof bool !== 'boolean') {\n return new Error('Argument type: ' + typeof bool +\n '. Please use a boolean.');\n }\n deprecationWarnings_ = !bool;\n return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');\n}\n\nexport function log() {\n if (typeof window === 'object') {\n if (logDisabled_) {\n return;\n }\n if (typeof console !== 'undefined' && typeof console.log === 'function') {\n console.log.apply(console, arguments);\n }\n }\n}\n\n/**\n * Shows a deprecation warning suggesting the modern and spec-compatible API.\n */\nexport function deprecated(oldMethod, newMethod) {\n if (!deprecationWarnings_) {\n return;\n }\n console.warn(oldMethod + ' is deprecated, please use ' + newMethod +\n ' instead.');\n}\n\n/**\n * Browser detector.\n *\n * @return {object} result containing browser and version\n * properties.\n */\nexport function detectBrowser(window) {\n // Returned result object.\n const result = {browser: null, version: null};\n\n // Fail early if it's not a browser\n if (typeof window === 'undefined' || !window.navigator ||\n !window.navigator.userAgent) {\n result.browser = 'Not a browser.';\n return result;\n }\n\n const {navigator} = window;\n\n if (navigator.mozGetUserMedia) { // Firefox.\n result.browser = 'firefox';\n result.version = extractVersion(navigator.userAgent,\n /Firefox\\/(\\d+)\\./, 1);\n } else if (navigator.webkitGetUserMedia ||\n (window.isSecureContext === false && window.webkitRTCPeerConnection)) {\n // Chrome, Chromium, Webview, Opera.\n // Version matches Chrome/WebRTC version.\n // Chrome 74 removed webkitGetUserMedia on http as well so we need the\n // more complicated fallback to webkitRTCPeerConnection.\n result.browser = 'chrome';\n result.version = extractVersion(navigator.userAgent,\n /Chrom(e|ium)\\/(\\d+)\\./, 2);\n } else if (window.RTCPeerConnection &&\n navigator.userAgent.match(/AppleWebKit\\/(\\d+)\\./)) { // Safari.\n result.browser = 'safari';\n result.version = extractVersion(navigator.userAgent,\n /AppleWebKit\\/(\\d+)\\./, 1);\n result.supportsUnifiedPlan = window.RTCRtpTransceiver &&\n 'currentDirection' in window.RTCRtpTransceiver.prototype;\n } else { // Default fallthrough: not supported.\n result.browser = 'Not a supported browser.';\n return result;\n }\n\n return result;\n}\n\n/**\n * Checks if something is an object.\n *\n * @param {*} val The something you want to check.\n * @return true if val is an object, false otherwise.\n */\nfunction isObject(val) {\n return Object.prototype.toString.call(val) === '[object Object]';\n}\n\n/**\n * Remove all empty objects and undefined values\n * from a nested object -- an enhanced and vanilla version\n * of Lodash's `compact`.\n */\nexport function compactObject(data) {\n if (!isObject(data)) {\n return data;\n }\n\n return Object.keys(data).reduce(function(accumulator, key) {\n const isObj = isObject(data[key]);\n const value = isObj ? compactObject(data[key]) : data[key];\n const isEmptyObject = isObj && !Object.keys(value).length;\n if (value === undefined || isEmptyObject) {\n return accumulator;\n }\n return Object.assign(accumulator, {[key]: value});\n }, {});\n}\n\n/* iterates the stats graph recursively. */\nexport function walkStats(stats, base, resultSet) {\n if (!base || resultSet.has(base.id)) {\n return;\n }\n resultSet.set(base.id, base);\n Object.keys(base).forEach(name => {\n if (name.endsWith('Id')) {\n walkStats(stats, stats.get(base[name]), resultSet);\n } else if (name.endsWith('Ids')) {\n base[name].forEach(id => {\n walkStats(stats, stats.get(id), resultSet);\n });\n }\n });\n}\n\n/* filter getStats for a sender/receiver track. */\nexport function filterStats(result, track, outbound) {\n const streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';\n const filteredResult = new Map();\n if (track === null) {\n return filteredResult;\n }\n const trackStats = [];\n result.forEach(value => {\n if (value.type === 'track' &&\n value.trackIdentifier === track.id) {\n trackStats.push(value);\n }\n });\n trackStats.forEach(trackStat => {\n result.forEach(stats => {\n if (stats.type === streamStatsType && stats.trackId === trackStat.id) {\n walkStats(result, stats, filteredResult);\n }\n });\n });\n return filteredResult;\n}\n\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\nimport * as utils from '../utils.js';\nconst logging = utils.log;\n\nexport function shimGetUserMedia(window, browserDetails) {\n const navigator = window && window.navigator;\n\n if (!navigator.mediaDevices) {\n return;\n }\n\n const constraintsToChrome_ = function(c) {\n if (typeof c !== 'object' || c.mandatory || c.optional) {\n return c;\n }\n const cc = {};\n Object.keys(c).forEach(key => {\n if (key === 'require' || key === 'advanced' || key === 'mediaSource') {\n return;\n }\n const r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};\n if (r.exact !== undefined && typeof r.exact === 'number') {\n r.min = r.max = r.exact;\n }\n const oldname_ = function(prefix, name) {\n if (prefix) {\n return prefix + name.charAt(0).toUpperCase() + name.slice(1);\n }\n return (name === 'deviceId') ? 'sourceId' : name;\n };\n if (r.ideal !== undefined) {\n cc.optional = cc.optional || [];\n let oc = {};\n if (typeof r.ideal === 'number') {\n oc[oldname_('min', key)] = r.ideal;\n cc.optional.push(oc);\n oc = {};\n oc[oldname_('max', key)] = r.ideal;\n cc.optional.push(oc);\n } else {\n oc[oldname_('', key)] = r.ideal;\n cc.optional.push(oc);\n }\n }\n if (r.exact !== undefined && typeof r.exact !== 'number') {\n cc.mandatory = cc.mandatory || {};\n cc.mandatory[oldname_('', key)] = r.exact;\n } else {\n ['min', 'max'].forEach(mix => {\n if (r[mix] !== undefined) {\n cc.mandatory = cc.mandatory || {};\n cc.mandatory[oldname_(mix, key)] = r[mix];\n }\n });\n }\n });\n if (c.advanced) {\n cc.optional = (cc.optional || []).concat(c.advanced);\n }\n return cc;\n };\n\n const shimConstraints_ = function(constraints, func) {\n if (browserDetails.version >= 61) {\n return func(constraints);\n }\n constraints = JSON.parse(JSON.stringify(constraints));\n if (constraints && typeof constraints.audio === 'object') {\n const remap = function(obj, a, b) {\n if (a in obj && !(b in obj)) {\n obj[b] = obj[a];\n delete obj[a];\n }\n };\n constraints = JSON.parse(JSON.stringify(constraints));\n remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');\n remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');\n constraints.audio = constraintsToChrome_(constraints.audio);\n }\n if (constraints && typeof constraints.video === 'object') {\n // Shim facingMode for mobile & surface pro.\n let face = constraints.video.facingMode;\n face = face && ((typeof face === 'object') ? face : {ideal: face});\n const getSupportedFacingModeLies = browserDetails.version < 66;\n\n if ((face && (face.exact === 'user' || face.exact === 'environment' ||\n face.ideal === 'user' || face.ideal === 'environment')) &&\n !(navigator.mediaDevices.getSupportedConstraints &&\n navigator.mediaDevices.getSupportedConstraints().facingMode &&\n !getSupportedFacingModeLies)) {\n delete constraints.video.facingMode;\n let matches;\n if (face.exact === 'environment' || face.ideal === 'environment') {\n matches = ['back', 'rear'];\n } else if (face.exact === 'user' || face.ideal === 'user') {\n matches = ['front'];\n }\n if (matches) {\n // Look for matches in label, or use last cam for back (typical).\n return navigator.mediaDevices.enumerateDevices()\n .then(devices => {\n devices = devices.filter(d => d.kind === 'videoinput');\n let dev = devices.find(d => matches.some(match =>\n d.label.toLowerCase().includes(match)));\n if (!dev && devices.length && matches.includes('back')) {\n dev = devices[devices.length - 1]; // more likely the back cam\n }\n if (dev) {\n constraints.video.deviceId = face.exact\n ? {exact: dev.deviceId}\n : {ideal: dev.deviceId};\n }\n constraints.video = constraintsToChrome_(constraints.video);\n logging('chrome: ' + JSON.stringify(constraints));\n return func(constraints);\n });\n }\n }\n constraints.video = constraintsToChrome_(constraints.video);\n }\n logging('chrome: ' + JSON.stringify(constraints));\n return func(constraints);\n };\n\n const shimError_ = function(e) {\n if (browserDetails.version >= 64) {\n return e;\n }\n return {\n name: {\n PermissionDeniedError: 'NotAllowedError',\n PermissionDismissedError: 'NotAllowedError',\n InvalidStateError: 'NotAllowedError',\n DevicesNotFoundError: 'NotFoundError',\n ConstraintNotSatisfiedError: 'OverconstrainedError',\n TrackStartError: 'NotReadableError',\n MediaDeviceFailedDueToShutdown: 'NotAllowedError',\n MediaDeviceKillSwitchOn: 'NotAllowedError',\n TabCaptureError: 'AbortError',\n ScreenCaptureError: 'AbortError',\n DeviceCaptureError: 'AbortError'\n }[e.name] || e.name,\n message: e.message,\n constraint: e.constraint || e.constraintName,\n toString() {\n return this.name + (this.message && ': ') + this.message;\n }\n };\n };\n\n const getUserMedia_ = function(constraints, onSuccess, onError) {\n shimConstraints_(constraints, c => {\n navigator.webkitGetUserMedia(c, onSuccess, e => {\n if (onError) {\n onError(shimError_(e));\n }\n });\n });\n };\n navigator.getUserMedia = getUserMedia_.bind(navigator);\n\n // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia\n // function which returns a Promise, it does not accept spec-style\n // constraints.\n if (navigator.mediaDevices.getUserMedia) {\n const origGetUserMedia = navigator.mediaDevices.getUserMedia.\n bind(navigator.mediaDevices);\n navigator.mediaDevices.getUserMedia = function(cs) {\n return shimConstraints_(cs, c => origGetUserMedia(c).then(stream => {\n if (c.audio && !stream.getAudioTracks().length ||\n c.video && !stream.getVideoTracks().length) {\n stream.getTracks().forEach(track => {\n track.stop();\n });\n throw new DOMException('', 'NotFoundError');\n }\n return stream;\n }, e => Promise.reject(shimError_(e))));\n };\n }\n}\n","/*\n * Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\nexport function shimGetDisplayMedia(window, getSourceId) {\n if (window.navigator.mediaDevices &&\n 'getDisplayMedia' in window.navigator.mediaDevices) {\n return;\n }\n if (!(window.navigator.mediaDevices)) {\n return;\n }\n // getSourceId is a function that returns a promise resolving with\n // the sourceId of the screen/window/tab to be shared.\n if (typeof getSourceId !== 'function') {\n console.error('shimGetDisplayMedia: getSourceId argument is not ' +\n 'a function');\n return;\n }\n window.navigator.mediaDevices.getDisplayMedia =\n function getDisplayMedia(constraints) {\n return getSourceId(constraints)\n .then(sourceId => {\n const widthSpecified = constraints.video && constraints.video.width;\n const heightSpecified = constraints.video &&\n constraints.video.height;\n const frameRateSpecified = constraints.video &&\n constraints.video.frameRate;\n constraints.video = {\n mandatory: {\n chromeMediaSource: 'desktop',\n chromeMediaSourceId: sourceId,\n maxFrameRate: frameRateSpecified || 3\n }\n };\n if (widthSpecified) {\n constraints.video.mandatory.maxWidth = widthSpecified;\n }\n if (heightSpecified) {\n constraints.video.mandatory.maxHeight = heightSpecified;\n }\n return window.navigator.mediaDevices.getUserMedia(constraints);\n });\n };\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\nimport * as utils from '../utils.js';\n\nexport {shimGetUserMedia} from './getusermedia';\nexport {shimGetDisplayMedia} from './getdisplaymedia';\n\nexport function shimMediaStream(window) {\n window.MediaStream = window.MediaStream || window.webkitMediaStream;\n}\n\nexport function shimOnTrack(window) {\n if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in\n window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {\n get() {\n return this._ontrack;\n },\n set(f) {\n if (this._ontrack) {\n this.removeEventListener('track', this._ontrack);\n }\n this.addEventListener('track', this._ontrack = f);\n },\n enumerable: true,\n configurable: true\n });\n const origSetRemoteDescription =\n window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription =\n function setRemoteDescription() {\n if (!this._ontrackpoly) {\n this._ontrackpoly = (e) => {\n // onaddstream does not fire when a track is added to an existing\n // stream. But stream.onaddtrack is implemented so we use that.\n e.stream.addEventListener('addtrack', te => {\n let receiver;\n if (window.RTCPeerConnection.prototype.getReceivers) {\n receiver = this.getReceivers()\n .find(r => r.track && r.track.id === te.track.id);\n } else {\n receiver = {track: te.track};\n }\n\n const event = new Event('track');\n event.track = te.track;\n event.receiver = receiver;\n event.transceiver = {receiver};\n event.streams = [e.stream];\n this.dispatchEvent(event);\n });\n e.stream.getTracks().forEach(track => {\n let receiver;\n if (window.RTCPeerConnection.prototype.getReceivers) {\n receiver = this.getReceivers()\n .find(r => r.track && r.track.id === track.id);\n } else {\n receiver = {track};\n }\n const event = new Event('track');\n event.track = track;\n event.receiver = receiver;\n event.transceiver = {receiver};\n event.streams = [e.stream];\n this.dispatchEvent(event);\n });\n };\n this.addEventListener('addstream', this._ontrackpoly);\n }\n return origSetRemoteDescription.apply(this, arguments);\n };\n } else {\n // even if RTCRtpTransceiver is in window, it is only used and\n // emitted in unified-plan. Unfortunately this means we need\n // to unconditionally wrap the event.\n utils.wrapPeerConnectionEvent(window, 'track', e => {\n if (!e.transceiver) {\n Object.defineProperty(e, 'transceiver',\n {value: {receiver: e.receiver}});\n }\n return e;\n });\n }\n}\n\nexport function shimGetSendersWithDtmf(window) {\n // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.\n if (typeof window === 'object' && window.RTCPeerConnection &&\n !('getSenders' in window.RTCPeerConnection.prototype) &&\n 'createDTMFSender' in window.RTCPeerConnection.prototype) {\n const shimSenderWithDtmf = function(pc, track) {\n return {\n track,\n get dtmf() {\n if (this._dtmf === undefined) {\n if (track.kind === 'audio') {\n this._dtmf = pc.createDTMFSender(track);\n } else {\n this._dtmf = null;\n }\n }\n return this._dtmf;\n },\n _pc: pc\n };\n };\n\n // augment addTrack when getSenders is not available.\n if (!window.RTCPeerConnection.prototype.getSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n this._senders = this._senders || [];\n return this._senders.slice(); // return a copy of the internal state.\n };\n const origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addTrack =\n function addTrack(track, stream) {\n let sender = origAddTrack.apply(this, arguments);\n if (!sender) {\n sender = shimSenderWithDtmf(this, track);\n this._senders.push(sender);\n }\n return sender;\n };\n\n const origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;\n window.RTCPeerConnection.prototype.removeTrack =\n function removeTrack(sender) {\n origRemoveTrack.apply(this, arguments);\n const idx = this._senders.indexOf(sender);\n if (idx !== -1) {\n this._senders.splice(idx, 1);\n }\n };\n }\n const origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n this._senders = this._senders || [];\n origAddStream.apply(this, [stream]);\n stream.getTracks().forEach(track => {\n this._senders.push(shimSenderWithDtmf(this, track));\n });\n };\n\n const origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream =\n function removeStream(stream) {\n this._senders = this._senders || [];\n origRemoveStream.apply(this, [stream]);\n\n stream.getTracks().forEach(track => {\n const sender = this._senders.find(s => s.track === track);\n if (sender) { // remove sender\n this._senders.splice(this._senders.indexOf(sender), 1);\n }\n });\n };\n } else if (typeof window === 'object' && window.RTCPeerConnection &&\n 'getSenders' in window.RTCPeerConnection.prototype &&\n 'createDTMFSender' in window.RTCPeerConnection.prototype &&\n window.RTCRtpSender &&\n !('dtmf' in window.RTCRtpSender.prototype)) {\n const origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n const senders = origGetSenders.apply(this, []);\n senders.forEach(sender => sender._pc = this);\n return senders;\n };\n\n Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {\n get() {\n if (this._dtmf === undefined) {\n if (this.track.kind === 'audio') {\n this._dtmf = this._pc.createDTMFSender(this.track);\n } else {\n this._dtmf = null;\n }\n }\n return this._dtmf;\n }\n });\n }\n}\n\nexport function shimGetStats(window) {\n if (!window.RTCPeerConnection) {\n return;\n }\n\n const origGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n const [selector, onSucc, onErr] = arguments;\n\n // If selector is a function then we are in the old style stats so just\n // pass back the original getStats format to avoid breaking old users.\n if (arguments.length > 0 && typeof selector === 'function') {\n return origGetStats.apply(this, arguments);\n }\n\n // When spec-style getStats is supported, return those when called with\n // either no arguments or the selector argument is null.\n if (origGetStats.length === 0 && (arguments.length === 0 ||\n typeof selector !== 'function')) {\n return origGetStats.apply(this, []);\n }\n\n const fixChromeStats_ = function(response) {\n const standardReport = {};\n const reports = response.result();\n reports.forEach(report => {\n const standardStats = {\n id: report.id,\n timestamp: report.timestamp,\n type: {\n localcandidate: 'local-candidate',\n remotecandidate: 'remote-candidate'\n }[report.type] || report.type\n };\n report.names().forEach(name => {\n standardStats[name] = report.stat(name);\n });\n standardReport[standardStats.id] = standardStats;\n });\n\n return standardReport;\n };\n\n // shim getStats with maplike support\n const makeMapStats = function(stats) {\n return new Map(Object.keys(stats).map(key => [key, stats[key]]));\n };\n\n if (arguments.length >= 2) {\n const successCallbackWrapper_ = function(response) {\n onSucc(makeMapStats(fixChromeStats_(response)));\n };\n\n return origGetStats.apply(this, [successCallbackWrapper_,\n selector]);\n }\n\n // promise-support\n return new Promise((resolve, reject) => {\n origGetStats.apply(this, [\n function(response) {\n resolve(makeMapStats(fixChromeStats_(response)));\n }, reject]);\n }).then(onSucc, onErr);\n };\n}\n\nexport function shimSenderReceiverGetStats(window) {\n if (!(typeof window === 'object' && window.RTCPeerConnection &&\n window.RTCRtpSender && window.RTCRtpReceiver)) {\n return;\n }\n\n // shim sender stats.\n if (!('getStats' in window.RTCRtpSender.prototype)) {\n const origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n if (origGetSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n const senders = origGetSenders.apply(this, []);\n senders.forEach(sender => sender._pc = this);\n return senders;\n };\n }\n\n const origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n if (origAddTrack) {\n window.RTCPeerConnection.prototype.addTrack = function addTrack() {\n const sender = origAddTrack.apply(this, arguments);\n sender._pc = this;\n return sender;\n };\n }\n window.RTCRtpSender.prototype.getStats = function getStats() {\n const sender = this;\n return this._pc.getStats().then(result =>\n /* Note: this will include stats of all senders that\n * send a track with the same id as sender.track as\n * it is not possible to identify the RTCRtpSender.\n */\n utils.filterStats(result, sender.track, true));\n };\n }\n\n // shim receiver stats.\n if (!('getStats' in window.RTCRtpReceiver.prototype)) {\n const origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;\n if (origGetReceivers) {\n window.RTCPeerConnection.prototype.getReceivers =\n function getReceivers() {\n const receivers = origGetReceivers.apply(this, []);\n receivers.forEach(receiver => receiver._pc = this);\n return receivers;\n };\n }\n utils.wrapPeerConnectionEvent(window, 'track', e => {\n e.receiver._pc = e.srcElement;\n return e;\n });\n window.RTCRtpReceiver.prototype.getStats = function getStats() {\n const receiver = this;\n return this._pc.getStats().then(result =>\n utils.filterStats(result, receiver.track, false));\n };\n }\n\n if (!('getStats' in window.RTCRtpSender.prototype &&\n 'getStats' in window.RTCRtpReceiver.prototype)) {\n return;\n }\n\n // shim RTCPeerConnection.getStats(track).\n const origGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n if (arguments.length > 0 &&\n arguments[0] instanceof window.MediaStreamTrack) {\n const track = arguments[0];\n let sender;\n let receiver;\n let err;\n this.getSenders().forEach(s => {\n if (s.track === track) {\n if (sender) {\n err = true;\n } else {\n sender = s;\n }\n }\n });\n this.getReceivers().forEach(r => {\n if (r.track === track) {\n if (receiver) {\n err = true;\n } else {\n receiver = r;\n }\n }\n return r.track === track;\n });\n if (err || (sender && receiver)) {\n return Promise.reject(new DOMException(\n 'There are more than one sender or receiver for the track.',\n 'InvalidAccessError'));\n } else if (sender) {\n return sender.getStats();\n } else if (receiver) {\n return receiver.getStats();\n }\n return Promise.reject(new DOMException(\n 'There is no sender or receiver for the track.',\n 'InvalidAccessError'));\n }\n return origGetStats.apply(this, arguments);\n };\n}\n\nexport function shimAddTrackRemoveTrackWithNative(window) {\n // shim addTrack/removeTrack with native variants in order to make\n // the interactions with legacy getLocalStreams behave as in other browsers.\n // Keeps a mapping stream.id => [stream, rtpsenders...]\n window.RTCPeerConnection.prototype.getLocalStreams =\n function getLocalStreams() {\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n return Object.keys(this._shimmedLocalStreams)\n .map(streamId => this._shimmedLocalStreams[streamId][0]);\n };\n\n const origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addTrack =\n function addTrack(track, stream) {\n if (!stream) {\n return origAddTrack.apply(this, arguments);\n }\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n\n const sender = origAddTrack.apply(this, arguments);\n if (!this._shimmedLocalStreams[stream.id]) {\n this._shimmedLocalStreams[stream.id] = [stream, sender];\n } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {\n this._shimmedLocalStreams[stream.id].push(sender);\n }\n return sender;\n };\n\n const origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n\n stream.getTracks().forEach(track => {\n const alreadyExists = this.getSenders().find(s => s.track === track);\n if (alreadyExists) {\n throw new DOMException('Track already exists.',\n 'InvalidAccessError');\n }\n });\n const existingSenders = this.getSenders();\n origAddStream.apply(this, arguments);\n const newSenders = this.getSenders()\n .filter(newSender => existingSenders.indexOf(newSender) === -1);\n this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);\n };\n\n const origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream =\n function removeStream(stream) {\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n delete this._shimmedLocalStreams[stream.id];\n return origRemoveStream.apply(this, arguments);\n };\n\n const origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;\n window.RTCPeerConnection.prototype.removeTrack =\n function removeTrack(sender) {\n this._shimmedLocalStreams = this._shimmedLocalStreams || {};\n if (sender) {\n Object.keys(this._shimmedLocalStreams).forEach(streamId => {\n const idx = this._shimmedLocalStreams[streamId].indexOf(sender);\n if (idx !== -1) {\n this._shimmedLocalStreams[streamId].splice(idx, 1);\n }\n if (this._shimmedLocalStreams[streamId].length === 1) {\n delete this._shimmedLocalStreams[streamId];\n }\n });\n }\n return origRemoveTrack.apply(this, arguments);\n };\n}\n\nexport function shimAddTrackRemoveTrack(window, browserDetails) {\n if (!window.RTCPeerConnection) {\n return;\n }\n // shim addTrack and removeTrack.\n if (window.RTCPeerConnection.prototype.addTrack &&\n browserDetails.version >= 65) {\n return shimAddTrackRemoveTrackWithNative(window);\n }\n\n // also shim pc.getLocalStreams when addTrack is shimmed\n // to return the original streams.\n const origGetLocalStreams = window.RTCPeerConnection.prototype\n .getLocalStreams;\n window.RTCPeerConnection.prototype.getLocalStreams =\n function getLocalStreams() {\n const nativeStreams = origGetLocalStreams.apply(this);\n this._reverseStreams = this._reverseStreams || {};\n return nativeStreams.map(stream => this._reverseStreams[stream.id]);\n };\n\n const origAddStream = window.RTCPeerConnection.prototype.addStream;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n\n stream.getTracks().forEach(track => {\n const alreadyExists = this.getSenders().find(s => s.track === track);\n if (alreadyExists) {\n throw new DOMException('Track already exists.',\n 'InvalidAccessError');\n }\n });\n // Add identity mapping for consistency with addTrack.\n // Unless this is being used with a stream from addTrack.\n if (!this._reverseStreams[stream.id]) {\n const newStream = new window.MediaStream(stream.getTracks());\n this._streams[stream.id] = newStream;\n this._reverseStreams[newStream.id] = stream;\n stream = newStream;\n }\n origAddStream.apply(this, [stream]);\n };\n\n const origRemoveStream = window.RTCPeerConnection.prototype.removeStream;\n window.RTCPeerConnection.prototype.removeStream =\n function removeStream(stream) {\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n\n origRemoveStream.apply(this, [(this._streams[stream.id] || stream)]);\n delete this._reverseStreams[(this._streams[stream.id] ?\n this._streams[stream.id].id : stream.id)];\n delete this._streams[stream.id];\n };\n\n window.RTCPeerConnection.prototype.addTrack =\n function addTrack(track, stream) {\n if (this.signalingState === 'closed') {\n throw new DOMException(\n 'The RTCPeerConnection\\'s signalingState is \\'closed\\'.',\n 'InvalidStateError');\n }\n const streams = [].slice.call(arguments, 1);\n if (streams.length !== 1 ||\n !streams[0].getTracks().find(t => t === track)) {\n // this is not fully correct but all we can manage without\n // [[associated MediaStreams]] internal slot.\n throw new DOMException(\n 'The adapter.js addTrack polyfill only supports a single ' +\n ' stream which is associated with the specified track.',\n 'NotSupportedError');\n }\n\n const alreadyExists = this.getSenders().find(s => s.track === track);\n if (alreadyExists) {\n throw new DOMException('Track already exists.',\n 'InvalidAccessError');\n }\n\n this._streams = this._streams || {};\n this._reverseStreams = this._reverseStreams || {};\n const oldStream = this._streams[stream.id];\n if (oldStream) {\n // this is using odd Chrome behaviour, use with caution:\n // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815\n // Note: we rely on the high-level addTrack/dtmf shim to\n // create the sender with a dtmf sender.\n oldStream.addTrack(track);\n\n // Trigger ONN async.\n Promise.resolve().then(() => {\n this.dispatchEvent(new Event('negotiationneeded'));\n });\n } else {\n const newStream = new window.MediaStream([track]);\n this._streams[stream.id] = newStream;\n this._reverseStreams[newStream.id] = stream;\n this.addStream(newStream);\n }\n return this.getSenders().find(s => s.track === track);\n };\n\n // replace the internal stream id with the external one and\n // vice versa.\n function replaceInternalStreamId(pc, description) {\n let sdp = description.sdp;\n Object.keys(pc._reverseStreams || []).forEach(internalId => {\n const externalStream = pc._reverseStreams[internalId];\n const internalStream = pc._streams[externalStream.id];\n sdp = sdp.replace(new RegExp(internalStream.id, 'g'),\n externalStream.id);\n });\n return new RTCSessionDescription({\n type: description.type,\n sdp\n });\n }\n function replaceExternalStreamId(pc, description) {\n let sdp = description.sdp;\n Object.keys(pc._reverseStreams || []).forEach(internalId => {\n const externalStream = pc._reverseStreams[internalId];\n const internalStream = pc._streams[externalStream.id];\n sdp = sdp.replace(new RegExp(externalStream.id, 'g'),\n internalStream.id);\n });\n return new RTCSessionDescription({\n type: description.type,\n sdp\n });\n }\n ['createOffer', 'createAnswer'].forEach(function(method) {\n const nativeMethod = window.RTCPeerConnection.prototype[method];\n const methodObj = {[method]() {\n const args = arguments;\n const isLegacyCall = arguments.length &&\n typeof arguments[0] === 'function';\n if (isLegacyCall) {\n return nativeMethod.apply(this, [\n (description) => {\n const desc = replaceInternalStreamId(this, description);\n args[0].apply(null, [desc]);\n },\n (err) => {\n if (args[1]) {\n args[1].apply(null, err);\n }\n }, arguments[2]\n ]);\n }\n return nativeMethod.apply(this, arguments)\n .then(description => replaceInternalStreamId(this, description));\n }};\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n\n const origSetLocalDescription =\n window.RTCPeerConnection.prototype.setLocalDescription;\n window.RTCPeerConnection.prototype.setLocalDescription =\n function setLocalDescription() {\n if (!arguments.length || !arguments[0].type) {\n return origSetLocalDescription.apply(this, arguments);\n }\n arguments[0] = replaceExternalStreamId(this, arguments[0]);\n return origSetLocalDescription.apply(this, arguments);\n };\n\n // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier\n\n const origLocalDescription = Object.getOwnPropertyDescriptor(\n window.RTCPeerConnection.prototype, 'localDescription');\n Object.defineProperty(window.RTCPeerConnection.prototype,\n 'localDescription', {\n get() {\n const description = origLocalDescription.get.apply(this);\n if (description.type === '') {\n return description;\n }\n return replaceInternalStreamId(this, description);\n }\n });\n\n window.RTCPeerConnection.prototype.removeTrack =\n function removeTrack(sender) {\n if (this.signalingState === 'closed') {\n throw new DOMException(\n 'The RTCPeerConnection\\'s signalingState is \\'closed\\'.',\n 'InvalidStateError');\n }\n // We can not yet check for sender instanceof RTCRtpSender\n // since we shim RTPSender. So we check if sender._pc is set.\n if (!sender._pc) {\n throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' +\n 'does not implement interface RTCRtpSender.', 'TypeError');\n }\n const isLocal = sender._pc === this;\n if (!isLocal) {\n throw new DOMException('Sender was not created by this connection.',\n 'InvalidAccessError');\n }\n\n // Search for the native stream the senders track belongs to.\n this._streams = this._streams || {};\n let stream;\n Object.keys(this._streams).forEach(streamid => {\n const hasTrack = this._streams[streamid].getTracks()\n .find(track => sender.track === track);\n if (hasTrack) {\n stream = this._streams[streamid];\n }\n });\n\n if (stream) {\n if (stream.getTracks().length === 1) {\n // if this is the last track of the stream, remove the stream. This\n // takes care of any shimmed _senders.\n this.removeStream(this._reverseStreams[stream.id]);\n } else {\n // relying on the same odd chrome behaviour as above.\n stream.removeTrack(sender.track);\n }\n this.dispatchEvent(new Event('negotiationneeded'));\n }\n };\n}\n\nexport function shimPeerConnection(window, browserDetails) {\n if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {\n // very basic support for old versions.\n window.RTCPeerConnection = window.webkitRTCPeerConnection;\n }\n if (!window.RTCPeerConnection) {\n return;\n }\n\n // shim implicit creation of RTCSessionDescription/RTCIceCandidate\n if (browserDetails.version < 53) {\n ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']\n .forEach(function(method) {\n const nativeMethod = window.RTCPeerConnection.prototype[method];\n const methodObj = {[method]() {\n arguments[0] = new ((method === 'addIceCandidate') ?\n window.RTCIceCandidate :\n window.RTCSessionDescription)(arguments[0]);\n return nativeMethod.apply(this, arguments);\n }};\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n }\n}\n\n// Attempt to fix ONN in plan-b mode.\nexport function fixNegotiationNeeded(window, browserDetails) {\n utils.wrapPeerConnectionEvent(window, 'negotiationneeded', e => {\n const pc = e.target;\n if (browserDetails.version < 72 || (pc.getConfiguration &&\n pc.getConfiguration().sdpSemantics === 'plan-b')) {\n if (pc.signalingState !== 'stable') {\n return;\n }\n }\n return e;\n });\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nimport * as utils from '../utils';\n\nexport function shimGetUserMedia(window, browserDetails) {\n const navigator = window && window.navigator;\n const MediaStreamTrack = window && window.MediaStreamTrack;\n\n navigator.getUserMedia = function(constraints, onSuccess, onError) {\n // Replace Firefox 44+'s deprecation warning with unprefixed version.\n utils.deprecated('navigator.getUserMedia',\n 'navigator.mediaDevices.getUserMedia');\n navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);\n };\n\n if (!(browserDetails.version > 55 &&\n 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {\n const remap = function(obj, a, b) {\n if (a in obj && !(b in obj)) {\n obj[b] = obj[a];\n delete obj[a];\n }\n };\n\n const nativeGetUserMedia = navigator.mediaDevices.getUserMedia.\n bind(navigator.mediaDevices);\n navigator.mediaDevices.getUserMedia = function(c) {\n if (typeof c === 'object' && typeof c.audio === 'object') {\n c = JSON.parse(JSON.stringify(c));\n remap(c.audio, 'autoGainControl', 'mozAutoGainControl');\n remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');\n }\n return nativeGetUserMedia(c);\n };\n\n if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {\n const nativeGetSettings = MediaStreamTrack.prototype.getSettings;\n MediaStreamTrack.prototype.getSettings = function() {\n const obj = nativeGetSettings.apply(this, arguments);\n remap(obj, 'mozAutoGainControl', 'autoGainControl');\n remap(obj, 'mozNoiseSuppression', 'noiseSuppression');\n return obj;\n };\n }\n\n if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {\n const nativeApplyConstraints =\n MediaStreamTrack.prototype.applyConstraints;\n MediaStreamTrack.prototype.applyConstraints = function(c) {\n if (this.kind === 'audio' && typeof c === 'object') {\n c = JSON.parse(JSON.stringify(c));\n remap(c, 'autoGainControl', 'mozAutoGainControl');\n remap(c, 'noiseSuppression', 'mozNoiseSuppression');\n }\n return nativeApplyConstraints.apply(this, [c]);\n };\n }\n }\n}\n","/*\n * Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nexport function shimGetDisplayMedia(window, preferredMediaSource) {\n if (window.navigator.mediaDevices &&\n 'getDisplayMedia' in window.navigator.mediaDevices) {\n return;\n }\n if (!(window.navigator.mediaDevices)) {\n return;\n }\n window.navigator.mediaDevices.getDisplayMedia =\n function getDisplayMedia(constraints) {\n if (!(constraints && constraints.video)) {\n const err = new DOMException('getDisplayMedia without video ' +\n 'constraints is undefined');\n err.name = 'NotFoundError';\n // from https://heycam.github.io/webidl/#idl-DOMException-error-names\n err.code = 8;\n return Promise.reject(err);\n }\n if (constraints.video === true) {\n constraints.video = {mediaSource: preferredMediaSource};\n } else {\n constraints.video.mediaSource = preferredMediaSource;\n }\n return window.navigator.mediaDevices.getUserMedia(constraints);\n };\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nimport * as utils from '../utils';\nexport {shimGetUserMedia} from './getusermedia';\nexport {shimGetDisplayMedia} from './getdisplaymedia';\n\nexport function shimOnTrack(window) {\n if (typeof window === 'object' && window.RTCTrackEvent &&\n ('receiver' in window.RTCTrackEvent.prototype) &&\n !('transceiver' in window.RTCTrackEvent.prototype)) {\n Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {\n get() {\n return {receiver: this.receiver};\n }\n });\n }\n}\n\nexport function shimPeerConnection(window, browserDetails) {\n if (typeof window !== 'object' ||\n !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {\n return; // probably media.peerconnection.enabled=false in about:config\n }\n if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {\n // very basic support for old versions.\n window.RTCPeerConnection = window.mozRTCPeerConnection;\n }\n\n if (browserDetails.version < 53) {\n // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.\n ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']\n .forEach(function(method) {\n const nativeMethod = window.RTCPeerConnection.prototype[method];\n const methodObj = {[method]() {\n arguments[0] = new ((method === 'addIceCandidate') ?\n window.RTCIceCandidate :\n window.RTCSessionDescription)(arguments[0]);\n return nativeMethod.apply(this, arguments);\n }};\n window.RTCPeerConnection.prototype[method] = methodObj[method];\n });\n }\n\n const modernStatsTypes = {\n inboundrtp: 'inbound-rtp',\n outboundrtp: 'outbound-rtp',\n candidatepair: 'candidate-pair',\n localcandidate: 'local-candidate',\n remotecandidate: 'remote-candidate'\n };\n\n const nativeGetStats = window.RTCPeerConnection.prototype.getStats;\n window.RTCPeerConnection.prototype.getStats = function getStats() {\n const [selector, onSucc, onErr] = arguments;\n return nativeGetStats.apply(this, [selector || null])\n .then(stats => {\n if (browserDetails.version < 53 && !onSucc) {\n // Shim only promise getStats with spec-hyphens in type names\n // Leave callback version alone; misc old uses of forEach before Map\n try {\n stats.forEach(stat => {\n stat.type = modernStatsTypes[stat.type] || stat.type;\n });\n } catch (e) {\n if (e.name !== 'TypeError') {\n throw e;\n }\n // Avoid TypeError: \"type\" is read-only, in old versions. 34-43ish\n stats.forEach((stat, i) => {\n stats.set(i, Object.assign({}, stat, {\n type: modernStatsTypes[stat.type] || stat.type\n }));\n });\n }\n }\n return stats;\n })\n .then(onSucc, onErr);\n };\n}\n\nexport function shimSenderGetStats(window) {\n if (!(typeof window === 'object' && window.RTCPeerConnection &&\n window.RTCRtpSender)) {\n return;\n }\n if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {\n return;\n }\n const origGetSenders = window.RTCPeerConnection.prototype.getSenders;\n if (origGetSenders) {\n window.RTCPeerConnection.prototype.getSenders = function getSenders() {\n const senders = origGetSenders.apply(this, []);\n senders.forEach(sender => sender._pc = this);\n return senders;\n };\n }\n\n const origAddTrack = window.RTCPeerConnection.prototype.addTrack;\n if (origAddTrack) {\n window.RTCPeerConnection.prototype.addTrack = function addTrack() {\n const sender = origAddTrack.apply(this, arguments);\n sender._pc = this;\n return sender;\n };\n }\n window.RTCRtpSender.prototype.getStats = function getStats() {\n return this.track ? this._pc.getStats(this.track) :\n Promise.resolve(new Map());\n };\n}\n\nexport function shimReceiverGetStats(window) {\n if (!(typeof window === 'object' && window.RTCPeerConnection &&\n window.RTCRtpSender)) {\n return;\n }\n if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {\n return;\n }\n const origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;\n if (origGetReceivers) {\n window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {\n const receivers = origGetReceivers.apply(this, []);\n receivers.forEach(receiver => receiver._pc = this);\n return receivers;\n };\n }\n utils.wrapPeerConnectionEvent(window, 'track', e => {\n e.receiver._pc = e.srcElement;\n return e;\n });\n window.RTCRtpReceiver.prototype.getStats = function getStats() {\n return this._pc.getStats(this.track);\n };\n}\n\nexport function shimRemoveStream(window) {\n if (!window.RTCPeerConnection ||\n 'removeStream' in window.RTCPeerConnection.prototype) {\n return;\n }\n window.RTCPeerConnection.prototype.removeStream =\n function removeStream(stream) {\n utils.deprecated('removeStream', 'removeTrack');\n this.getSenders().forEach(sender => {\n if (sender.track && stream.getTracks().includes(sender.track)) {\n this.removeTrack(sender);\n }\n });\n };\n}\n\nexport function shimRTCDataChannel(window) {\n // rename DataChannel to RTCDataChannel (native fix in FF60):\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851\n if (window.DataChannel && !window.RTCDataChannel) {\n window.RTCDataChannel = window.DataChannel;\n }\n}\n\nexport function shimAddTransceiver(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!(typeof window === 'object' && window.RTCPeerConnection)) {\n return;\n }\n const origAddTransceiver = window.RTCPeerConnection.prototype.addTransceiver;\n if (origAddTransceiver) {\n window.RTCPeerConnection.prototype.addTransceiver =\n function addTransceiver() {\n this.setParametersPromises = [];\n // WebIDL input coercion and validation\n let sendEncodings = arguments[1] && arguments[1].sendEncodings;\n if (sendEncodings === undefined) {\n sendEncodings = [];\n }\n sendEncodings = [...sendEncodings];\n const shouldPerformCheck = sendEncodings.length > 0;\n if (shouldPerformCheck) {\n // If sendEncodings params are provided, validate grammar\n sendEncodings.forEach((encodingParam) => {\n if ('rid' in encodingParam) {\n const ridRegex = /^[a-z0-9]{0,16}$/i;\n if (!ridRegex.test(encodingParam.rid)) {\n throw new TypeError('Invalid RID value provided.');\n }\n }\n if ('scaleResolutionDownBy' in encodingParam) {\n if (!(parseFloat(encodingParam.scaleResolutionDownBy) >= 1.0)) {\n throw new RangeError('scale_resolution_down_by must be >= 1.0');\n }\n }\n if ('maxFramerate' in encodingParam) {\n if (!(parseFloat(encodingParam.maxFramerate) >= 0)) {\n throw new RangeError('max_framerate must be >= 0.0');\n }\n }\n });\n }\n const transceiver = origAddTransceiver.apply(this, arguments);\n if (shouldPerformCheck) {\n // Check if the init options were applied. If not we do this in an\n // asynchronous way and save the promise reference in a global object.\n // This is an ugly hack, but at the same time is way more robust than\n // checking the sender parameters before and after the createOffer\n // Also note that after the createoffer we are not 100% sure that\n // the params were asynchronously applied so we might miss the\n // opportunity to recreate offer.\n const {sender} = transceiver;\n const params = sender.getParameters();\n if (!('encodings' in params) ||\n // Avoid being fooled by patched getParameters() below.\n (params.encodings.length === 1 &&\n Object.keys(params.encodings[0]).length === 0)) {\n params.encodings = sendEncodings;\n sender.sendEncodings = sendEncodings;\n this.setParametersPromises.push(sender.setParameters(params)\n .then(() => {\n delete sender.sendEncodings;\n }).catch(() => {\n delete sender.sendEncodings;\n })\n );\n }\n }\n return transceiver;\n };\n }\n}\n\nexport function shimGetParameters(window) {\n if (!(typeof window === 'object' && window.RTCRtpSender)) {\n return;\n }\n const origGetParameters = window.RTCRtpSender.prototype.getParameters;\n if (origGetParameters) {\n window.RTCRtpSender.prototype.getParameters =\n function getParameters() {\n const params = origGetParameters.apply(this, arguments);\n if (!('encodings' in params)) {\n params.encodings = [].concat(this.sendEncodings || [{}]);\n }\n return params;\n };\n }\n}\n\nexport function shimCreateOffer(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!(typeof window === 'object' && window.RTCPeerConnection)) {\n return;\n }\n const origCreateOffer = window.RTCPeerConnection.prototype.createOffer;\n window.RTCPeerConnection.prototype.createOffer = function createOffer() {\n if (this.setParametersPromises && this.setParametersPromises.length) {\n return Promise.all(this.setParametersPromises)\n .then(() => {\n return origCreateOffer.apply(this, arguments);\n })\n .finally(() => {\n this.setParametersPromises = [];\n });\n }\n return origCreateOffer.apply(this, arguments);\n };\n}\n\nexport function shimCreateAnswer(window) {\n // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647\n // Firefox ignores the init sendEncodings options passed to addTransceiver\n // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918\n if (!(typeof window === 'object' && window.RTCPeerConnection)) {\n return;\n }\n const origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;\n window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {\n if (this.setParametersPromises && this.setParametersPromises.length) {\n return Promise.all(this.setParametersPromises)\n .then(() => {\n return origCreateAnswer.apply(this, arguments);\n })\n .finally(() => {\n this.setParametersPromises = [];\n });\n }\n return origCreateAnswer.apply(this, arguments);\n };\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n'use strict';\nimport * as utils from '../utils';\n\nexport function shimLocalStreamsAPI(window) {\n if (typeof window !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.getLocalStreams =\n function getLocalStreams() {\n if (!this._localStreams) {\n this._localStreams = [];\n }\n return this._localStreams;\n };\n }\n if (!('addStream' in window.RTCPeerConnection.prototype)) {\n const _addTrack = window.RTCPeerConnection.prototype.addTrack;\n window.RTCPeerConnection.prototype.addStream = function addStream(stream) {\n if (!this._localStreams) {\n this._localStreams = [];\n }\n if (!this._localStreams.includes(stream)) {\n this._localStreams.push(stream);\n }\n // Try to emulate Chrome's behaviour of adding in audio-video order.\n // Safari orders by track id.\n stream.getAudioTracks().forEach(track => _addTrack.call(this, track,\n stream));\n stream.getVideoTracks().forEach(track => _addTrack.call(this, track,\n stream));\n };\n\n window.RTCPeerConnection.prototype.addTrack =\n function addTrack(track, ...streams) {\n if (streams) {\n streams.forEach((stream) => {\n if (!this._localStreams) {\n this._localStreams = [stream];\n } else if (!this._localStreams.includes(stream)) {\n this._localStreams.push(stream);\n }\n });\n }\n return _addTrack.apply(this, arguments);\n };\n }\n if (!('removeStream' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.removeStream =\n function removeStream(stream) {\n if (!this._localStreams) {\n this._localStreams = [];\n }\n const index = this._localStreams.indexOf(stream);\n if (index === -1) {\n return;\n }\n this._localStreams.splice(index, 1);\n const tracks = stream.getTracks();\n this.getSenders().forEach(sender => {\n if (tracks.includes(sender.track)) {\n this.removeTrack(sender);\n }\n });\n };\n }\n}\n\nexport function shimRemoteStreamsAPI(window) {\n if (typeof window !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {\n window.RTCPeerConnection.prototype.getRemoteStreams =\n function getRemoteStreams() {\n return this._remoteStreams ? this._remoteStreams : [];\n };\n }\n if (!('onaddstream' in window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {\n get() {\n return this._onaddstream;\n },\n set(f) {\n if (this._onaddstream) {\n this.removeEventListener('addstream', this._onaddstream);\n this.removeEventListener('track', this._onaddstreampoly);\n }\n this.addEventListener('addstream', this._onaddstream = f);\n this.addEventListener('track', this._onaddstreampoly = (e) => {\n e.streams.forEach(stream => {\n if (!this._remoteStreams) {\n this._remoteStreams = [];\n }\n if (this._remoteStreams.includes(stream)) {\n return;\n }\n this._remoteStreams.push(stream);\n const event = new Event('addstream');\n event.stream = stream;\n this.dispatchEvent(event);\n });\n });\n }\n });\n const origSetRemoteDescription =\n window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription =\n function setRemoteDescription() {\n const pc = this;\n if (!this._onaddstreampoly) {\n this.addEventListener('track', this._onaddstreampoly = function(e) {\n e.streams.forEach(stream => {\n if (!pc._remoteStreams) {\n pc._remoteStreams = [];\n }\n if (pc._remoteStreams.indexOf(stream) >= 0) {\n return;\n }\n pc._remoteStreams.push(stream);\n const event = new Event('addstream');\n event.stream = stream;\n pc.dispatchEvent(event);\n });\n });\n }\n return origSetRemoteDescription.apply(pc, arguments);\n };\n }\n}\n\nexport function shimCallbacksAPI(window) {\n if (typeof window !== 'object' || !window.RTCPeerConnection) {\n return;\n }\n const prototype = window.RTCPeerConnection.prototype;\n const origCreateOffer = prototype.createOffer;\n const origCreateAnswer = prototype.createAnswer;\n const setLocalDescription = prototype.setLocalDescription;\n const setRemoteDescription = prototype.setRemoteDescription;\n const addIceCandidate = prototype.addIceCandidate;\n\n prototype.createOffer =\n function createOffer(successCallback, failureCallback) {\n const options = (arguments.length >= 2) ? arguments[2] : arguments[0];\n const promise = origCreateOffer.apply(this, [options]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n\n prototype.createAnswer =\n function createAnswer(successCallback, failureCallback) {\n const options = (arguments.length >= 2) ? arguments[2] : arguments[0];\n const promise = origCreateAnswer.apply(this, [options]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n\n let withCallback = function(description, successCallback, failureCallback) {\n const promise = setLocalDescription.apply(this, [description]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.setLocalDescription = withCallback;\n\n withCallback = function(description, successCallback, failureCallback) {\n const promise = setRemoteDescription.apply(this, [description]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.setRemoteDescription = withCallback;\n\n withCallback = function(candidate, successCallback, failureCallback) {\n const promise = addIceCandidate.apply(this, [candidate]);\n if (!failureCallback) {\n return promise;\n }\n promise.then(successCallback, failureCallback);\n return Promise.resolve();\n };\n prototype.addIceCandidate = withCallback;\n}\n\nexport function shimGetUserMedia(window) {\n const navigator = window && window.navigator;\n\n if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {\n // shim not needed in Safari 12.1\n const mediaDevices = navigator.mediaDevices;\n const _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);\n navigator.mediaDevices.getUserMedia = (constraints) => {\n return _getUserMedia(shimConstraints(constraints));\n };\n }\n\n if (!navigator.getUserMedia && navigator.mediaDevices &&\n navigator.mediaDevices.getUserMedia) {\n navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {\n navigator.mediaDevices.getUserMedia(constraints)\n .then(cb, errcb);\n }.bind(navigator);\n }\n}\n\nexport function shimConstraints(constraints) {\n if (constraints && constraints.video !== undefined) {\n return Object.assign({},\n constraints,\n {video: utils.compactObject(constraints.video)}\n );\n }\n\n return constraints;\n}\n\nexport function shimRTCIceServerUrls(window) {\n if (!window.RTCPeerConnection) {\n return;\n }\n // migrate from non-spec RTCIceServer.url to RTCIceServer.urls\n const OrigPeerConnection = window.RTCPeerConnection;\n window.RTCPeerConnection =\n function RTCPeerConnection(pcConfig, pcConstraints) {\n if (pcConfig && pcConfig.iceServers) {\n const newIceServers = [];\n for (let i = 0; i < pcConfig.iceServers.length; i++) {\n let server = pcConfig.iceServers[i];\n if (server.urls === undefined && server.url) {\n utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');\n server = JSON.parse(JSON.stringify(server));\n server.urls = server.url;\n delete server.url;\n newIceServers.push(server);\n } else {\n newIceServers.push(pcConfig.iceServers[i]);\n }\n }\n pcConfig.iceServers = newIceServers;\n }\n return new OrigPeerConnection(pcConfig, pcConstraints);\n };\n window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;\n // wrap static methods. Currently just generateCertificate.\n if ('generateCertificate' in OrigPeerConnection) {\n Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {\n get() {\n return OrigPeerConnection.generateCertificate;\n }\n });\n }\n}\n\nexport function shimTrackEventTransceiver(window) {\n // Add event.transceiver member over deprecated event.receiver\n if (typeof window === 'object' && window.RTCTrackEvent &&\n 'receiver' in window.RTCTrackEvent.prototype &&\n !('transceiver' in window.RTCTrackEvent.prototype)) {\n Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {\n get() {\n return {receiver: this.receiver};\n }\n });\n }\n}\n\nexport function shimCreateOfferLegacy(window) {\n const origCreateOffer = window.RTCPeerConnection.prototype.createOffer;\n window.RTCPeerConnection.prototype.createOffer =\n function createOffer(offerOptions) {\n if (offerOptions) {\n if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {\n // support bit values\n offerOptions.offerToReceiveAudio =\n !!offerOptions.offerToReceiveAudio;\n }\n const audioTransceiver = this.getTransceivers().find(transceiver =>\n transceiver.receiver.track.kind === 'audio');\n if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {\n if (audioTransceiver.direction === 'sendrecv') {\n if (audioTransceiver.setDirection) {\n audioTransceiver.setDirection('sendonly');\n } else {\n audioTransceiver.direction = 'sendonly';\n }\n } else if (audioTransceiver.direction === 'recvonly') {\n if (audioTransceiver.setDirection) {\n audioTransceiver.setDirection('inactive');\n } else {\n audioTransceiver.direction = 'inactive';\n }\n }\n } else if (offerOptions.offerToReceiveAudio === true &&\n !audioTransceiver) {\n this.addTransceiver('audio', {direction: 'recvonly'});\n }\n\n if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {\n // support bit values\n offerOptions.offerToReceiveVideo =\n !!offerOptions.offerToReceiveVideo;\n }\n const videoTransceiver = this.getTransceivers().find(transceiver =>\n transceiver.receiver.track.kind === 'video');\n if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {\n if (videoTransceiver.direction === 'sendrecv') {\n if (videoTransceiver.setDirection) {\n videoTransceiver.setDirection('sendonly');\n } else {\n videoTransceiver.direction = 'sendonly';\n }\n } else if (videoTransceiver.direction === 'recvonly') {\n if (videoTransceiver.setDirection) {\n videoTransceiver.setDirection('inactive');\n } else {\n videoTransceiver.direction = 'inactive';\n }\n }\n } else if (offerOptions.offerToReceiveVideo === true &&\n !videoTransceiver) {\n this.addTransceiver('video', {direction: 'recvonly'});\n }\n }\n return origCreateOffer.apply(this, arguments);\n };\n}\n\nexport function shimAudioContext(window) {\n if (typeof window !== 'object' || window.AudioContext) {\n return;\n }\n window.AudioContext = window.webkitAudioContext;\n}\n\n","/*\n * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n'use strict';\n\nimport SDPUtils from 'sdp';\nimport * as utils from './utils';\n\nexport function shimRTCIceCandidate(window) {\n // foundation is arbitrarily chosen as an indicator for full support for\n // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface\n if (!window.RTCIceCandidate || (window.RTCIceCandidate && 'foundation' in\n window.RTCIceCandidate.prototype)) {\n return;\n }\n\n const NativeRTCIceCandidate = window.RTCIceCandidate;\n window.RTCIceCandidate = function RTCIceCandidate(args) {\n // Remove the a= which shouldn't be part of the candidate string.\n if (typeof args === 'object' && args.candidate &&\n args.candidate.indexOf('a=') === 0) {\n args = JSON.parse(JSON.stringify(args));\n args.candidate = args.candidate.substring(2);\n }\n\n if (args.candidate && args.candidate.length) {\n // Augment the native candidate with the parsed fields.\n const nativeCandidate = new NativeRTCIceCandidate(args);\n const parsedCandidate = SDPUtils.parseCandidate(args.candidate);\n for (const key in parsedCandidate) {\n if (!(key in nativeCandidate)) {\n Object.defineProperty(nativeCandidate, key,\n {value: parsedCandidate[key]});\n }\n }\n\n // Override serializer to not serialize the extra attributes.\n nativeCandidate.toJSON = function toJSON() {\n return {\n candidate: nativeCandidate.candidate,\n sdpMid: nativeCandidate.sdpMid,\n sdpMLineIndex: nativeCandidate.sdpMLineIndex,\n usernameFragment: nativeCandidate.usernameFragment,\n };\n };\n return nativeCandidate;\n }\n return new NativeRTCIceCandidate(args);\n };\n window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;\n\n // Hook up the augmented candidate in onicecandidate and\n // addEventListener('icecandidate', ...)\n utils.wrapPeerConnectionEvent(window, 'icecandidate', e => {\n if (e.candidate) {\n Object.defineProperty(e, 'candidate', {\n value: new window.RTCIceCandidate(e.candidate),\n writable: 'false'\n });\n }\n return e;\n });\n}\n\nexport function shimRTCIceCandidateRelayProtocol(window) {\n if (!window.RTCIceCandidate || (window.RTCIceCandidate && 'relayProtocol' in\n window.RTCIceCandidate.prototype)) {\n return;\n }\n\n // Hook up the augmented candidate in onicecandidate and\n // addEventListener('icecandidate', ...)\n utils.wrapPeerConnectionEvent(window, 'icecandidate', e => {\n if (e.candidate) {\n const parsedCandidate = SDPUtils.parseCandidate(e.candidate.candidate);\n if (parsedCandidate.type === 'relay') {\n // This is a libwebrtc-specific mapping of local type preference\n // to relayProtocol.\n e.candidate.relayProtocol = {\n 0: 'tls',\n 1: 'tcp',\n 2: 'udp',\n }[parsedCandidate.priority >> 24];\n }\n }\n return e;\n });\n}\n\nexport function shimMaxMessageSize(window, browserDetails) {\n if (!window.RTCPeerConnection) {\n return;\n }\n\n if (!('sctp' in window.RTCPeerConnection.prototype)) {\n Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {\n get() {\n return typeof this._sctp === 'undefined' ? null : this._sctp;\n }\n });\n }\n\n const sctpInDescription = function(description) {\n if (!description || !description.sdp) {\n return false;\n }\n const sections = SDPUtils.splitSections(description.sdp);\n sections.shift();\n return sections.some(mediaSection => {\n const mLine = SDPUtils.parseMLine(mediaSection);\n return mLine && mLine.kind === 'application'\n && mLine.protocol.indexOf('SCTP') !== -1;\n });\n };\n\n const getRemoteFirefoxVersion = function(description) {\n // TODO: Is there a better solution for detecting Firefox?\n const match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\\d+)/);\n if (match === null || match.length < 2) {\n return -1;\n }\n const version = parseInt(match[1], 10);\n // Test for NaN (yes, this is ugly)\n return version !== version ? -1 : version;\n };\n\n const getCanSendMaxMessageSize = function(remoteIsFirefox) {\n // Every implementation we know can send at least 64 KiB.\n // Note: Although Chrome is technically able to send up to 256 KiB, the\n // data does not reach the other peer reliably.\n // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419\n let canSendMaxMessageSize = 65536;\n if (browserDetails.browser === 'firefox') {\n if (browserDetails.version < 57) {\n if (remoteIsFirefox === -1) {\n // FF < 57 will send in 16 KiB chunks using the deprecated PPID\n // fragmentation.\n canSendMaxMessageSize = 16384;\n } else {\n // However, other FF (and RAWRTC) can reassemble PPID-fragmented\n // messages. Thus, supporting ~2 GiB when sending.\n canSendMaxMessageSize = 2147483637;\n }\n } else if (browserDetails.version < 60) {\n // Currently, all FF >= 57 will reset the remote maximum message size\n // to the default value when a data channel is created at a later\n // stage. :(\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831\n canSendMaxMessageSize =\n browserDetails.version === 57 ? 65535 : 65536;\n } else {\n // FF >= 60 supports sending ~2 GiB\n canSendMaxMessageSize = 2147483637;\n }\n }\n return canSendMaxMessageSize;\n };\n\n const getMaxMessageSize = function(description, remoteIsFirefox) {\n // Note: 65536 bytes is the default value from the SDP spec. Also,\n // every implementation we know supports receiving 65536 bytes.\n let maxMessageSize = 65536;\n\n // FF 57 has a slightly incorrect default remote max message size, so\n // we need to adjust it here to avoid a failure when sending.\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697\n if (browserDetails.browser === 'firefox'\n && browserDetails.version === 57) {\n maxMessageSize = 65535;\n }\n\n const match = SDPUtils.matchPrefix(description.sdp,\n 'a=max-message-size:');\n if (match.length > 0) {\n maxMessageSize = parseInt(match[0].substring(19), 10);\n } else if (browserDetails.browser === 'firefox' &&\n remoteIsFirefox !== -1) {\n // If the maximum message size is not present in the remote SDP and\n // both local and remote are Firefox, the remote peer can receive\n // ~2 GiB.\n maxMessageSize = 2147483637;\n }\n return maxMessageSize;\n };\n\n const origSetRemoteDescription =\n window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription =\n function setRemoteDescription() {\n this._sctp = null;\n // Chrome decided to not expose .sctp in plan-b mode.\n // As usual, adapter.js has to do an 'ugly worakaround'\n // to cover up the mess.\n if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {\n const {sdpSemantics} = this.getConfiguration();\n if (sdpSemantics === 'plan-b') {\n Object.defineProperty(this, 'sctp', {\n get() {\n return typeof this._sctp === 'undefined' ? null : this._sctp;\n },\n enumerable: true,\n configurable: true,\n });\n }\n }\n\n if (sctpInDescription(arguments[0])) {\n // Check if the remote is FF.\n const isFirefox = getRemoteFirefoxVersion(arguments[0]);\n\n // Get the maximum message size the local peer is capable of sending\n const canSendMMS = getCanSendMaxMessageSize(isFirefox);\n\n // Get the maximum message size of the remote peer.\n const remoteMMS = getMaxMessageSize(arguments[0], isFirefox);\n\n // Determine final maximum message size\n let maxMessageSize;\n if (canSendMMS === 0 && remoteMMS === 0) {\n maxMessageSize = Number.POSITIVE_INFINITY;\n } else if (canSendMMS === 0 || remoteMMS === 0) {\n maxMessageSize = Math.max(canSendMMS, remoteMMS);\n } else {\n maxMessageSize = Math.min(canSendMMS, remoteMMS);\n }\n\n // Create a dummy RTCSctpTransport object and the 'maxMessageSize'\n // attribute.\n const sctp = {};\n Object.defineProperty(sctp, 'maxMessageSize', {\n get() {\n return maxMessageSize;\n }\n });\n this._sctp = sctp;\n }\n\n return origSetRemoteDescription.apply(this, arguments);\n };\n}\n\nexport function shimSendThrowTypeError(window) {\n if (!(window.RTCPeerConnection &&\n 'createDataChannel' in window.RTCPeerConnection.prototype)) {\n return;\n }\n\n // Note: Although Firefox >= 57 has a native implementation, the maximum\n // message size can be reset for all data channels at a later stage.\n // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831\n\n function wrapDcSend(dc, pc) {\n const origDataChannelSend = dc.send;\n dc.send = function send() {\n const data = arguments[0];\n const length = data.length || data.size || data.byteLength;\n if (dc.readyState === 'open' &&\n pc.sctp && length > pc.sctp.maxMessageSize) {\n throw new TypeError('Message too large (can send a maximum of ' +\n pc.sctp.maxMessageSize + ' bytes)');\n }\n return origDataChannelSend.apply(dc, arguments);\n };\n }\n const origCreateDataChannel =\n window.RTCPeerConnection.prototype.createDataChannel;\n window.RTCPeerConnection.prototype.createDataChannel =\n function createDataChannel() {\n const dataChannel = origCreateDataChannel.apply(this, arguments);\n wrapDcSend(dataChannel, this);\n return dataChannel;\n };\n utils.wrapPeerConnectionEvent(window, 'datachannel', e => {\n wrapDcSend(e.channel, e.target);\n return e;\n });\n}\n\n\n/* shims RTCConnectionState by pretending it is the same as iceConnectionState.\n * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12\n * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect\n * since DTLS failures would be hidden. See\n * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827\n * for the Firefox tracking bug.\n */\nexport function shimConnectionState(window) {\n if (!window.RTCPeerConnection ||\n 'connectionState' in window.RTCPeerConnection.prototype) {\n return;\n }\n const proto = window.RTCPeerConnection.prototype;\n Object.defineProperty(proto, 'connectionState', {\n get() {\n return {\n completed: 'connected',\n checking: 'connecting'\n }[this.iceConnectionState] || this.iceConnectionState;\n },\n enumerable: true,\n configurable: true\n });\n Object.defineProperty(proto, 'onconnectionstatechange', {\n get() {\n return this._onconnectionstatechange || null;\n },\n set(cb) {\n if (this._onconnectionstatechange) {\n this.removeEventListener('connectionstatechange',\n this._onconnectionstatechange);\n delete this._onconnectionstatechange;\n }\n if (cb) {\n this.addEventListener('connectionstatechange',\n this._onconnectionstatechange = cb);\n }\n },\n enumerable: true,\n configurable: true\n });\n\n ['setLocalDescription', 'setRemoteDescription'].forEach((method) => {\n const origMethod = proto[method];\n proto[method] = function() {\n if (!this._connectionstatechangepoly) {\n this._connectionstatechangepoly = e => {\n const pc = e.target;\n if (pc._lastConnectionState !== pc.connectionState) {\n pc._lastConnectionState = pc.connectionState;\n const newEvent = new Event('connectionstatechange', e);\n pc.dispatchEvent(newEvent);\n }\n return e;\n };\n this.addEventListener('iceconnectionstatechange',\n this._connectionstatechangepoly);\n }\n return origMethod.apply(this, arguments);\n };\n });\n}\n\nexport function removeExtmapAllowMixed(window, browserDetails) {\n /* remove a=extmap-allow-mixed for webrtc.org < M71 */\n if (!window.RTCPeerConnection) {\n return;\n }\n if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {\n return;\n }\n if (browserDetails.browser === 'safari' && browserDetails.version >= 605) {\n return;\n }\n const nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;\n window.RTCPeerConnection.prototype.setRemoteDescription =\n function setRemoteDescription(desc) {\n if (desc && desc.sdp && desc.sdp.indexOf('\\na=extmap-allow-mixed') !== -1) {\n const sdp = desc.sdp.split('\\n').filter((line) => {\n return line.trim() !== 'a=extmap-allow-mixed';\n }).join('\\n');\n // Safari enforces read-only-ness of RTCSessionDescription fields.\n if (window.RTCSessionDescription &&\n desc instanceof window.RTCSessionDescription) {\n arguments[0] = new window.RTCSessionDescription({\n type: desc.type,\n sdp,\n });\n } else {\n desc.sdp = sdp;\n }\n }\n return nativeSRD.apply(this, arguments);\n };\n}\n\nexport function shimAddIceCandidateNullOrEmpty(window, browserDetails) {\n // Support for addIceCandidate(null or undefined)\n // as well as addIceCandidate({candidate: \"\", ...})\n // https://bugs.chromium.org/p/chromium/issues/detail?id=978582\n // Note: must be called before other polyfills which change the signature.\n if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {\n return;\n }\n const nativeAddIceCandidate =\n window.RTCPeerConnection.prototype.addIceCandidate;\n if (!nativeAddIceCandidate) {\n return;\n }\n window.RTCPeerConnection.prototype.addIceCandidate =\n function addIceCandidate() {\n if (!arguments[0]) {\n if (arguments[1]) {\n arguments[1].apply(null);\n }\n return Promise.resolve();\n }\n // Firefox 68+ emits and processes {candidate: \"\", ...}, ignore\n // in older versions.\n // Native support for ignoring exists for Chrome M77+.\n // Safari ignores as well, exact version unknown but works in the same\n // version that also ignores addIceCandidate(null).\n if (((browserDetails.browser === 'chrome' && browserDetails.version < 78)\n || (browserDetails.browser === 'firefox'\n && browserDetails.version < 68)\n || (browserDetails.browser === 'safari'))\n && arguments[0] && arguments[0].candidate === '') {\n return Promise.resolve();\n }\n return nativeAddIceCandidate.apply(this, arguments);\n };\n}\n\n// Note: Make sure to call this ahead of APIs that modify\n// setLocalDescription.length\nexport function shimParameterlessSetLocalDescription(window, browserDetails) {\n if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {\n return;\n }\n const nativeSetLocalDescription =\n window.RTCPeerConnection.prototype.setLocalDescription;\n if (!nativeSetLocalDescription || nativeSetLocalDescription.length === 0) {\n return;\n }\n window.RTCPeerConnection.prototype.setLocalDescription =\n function setLocalDescription() {\n let desc = arguments[0] || {};\n if (typeof desc !== 'object' || (desc.type && desc.sdp)) {\n return nativeSetLocalDescription.apply(this, arguments);\n }\n // The remaining steps should technically happen when SLD comes off the\n // RTCPeerConnection's operations chain (not ahead of going on it), but\n // this is too difficult to shim. Instead, this shim only covers the\n // common case where the operations chain is empty. This is imperfect, but\n // should cover many cases. Rationale: Even if we can't reduce the glare\n // window to zero on imperfect implementations, there's value in tapping\n // into the perfect negotiation pattern that several browsers support.\n desc = {type: desc.type, sdp: desc.sdp};\n if (!desc.type) {\n switch (this.signalingState) {\n case 'stable':\n case 'have-local-offer':\n case 'have-remote-pranswer':\n desc.type = 'offer';\n break;\n default:\n desc.type = 'answer';\n break;\n }\n }\n if (desc.sdp || (desc.type !== 'offer' && desc.type !== 'answer')) {\n return nativeSetLocalDescription.apply(this, [desc]);\n }\n const func = desc.type === 'offer' ? this.createOffer : this.createAnswer;\n return func.apply(this)\n .then(d => nativeSetLocalDescription.apply(this, [d]));\n };\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\nimport * as utils from './utils';\n\n// Browser shims.\nimport * as chromeShim from './chrome/chrome_shim';\nimport * as firefoxShim from './firefox/firefox_shim';\nimport * as safariShim from './safari/safari_shim';\nimport * as commonShim from './common_shim';\nimport * as sdp from 'sdp';\n\n// Shimming starts here.\nexport function adapterFactory({window} = {}, options = {\n shimChrome: true,\n shimFirefox: true,\n shimSafari: true,\n}) {\n // Utils.\n const logging = utils.log;\n const browserDetails = utils.detectBrowser(window);\n\n const adapter = {\n browserDetails,\n commonShim,\n extractVersion: utils.extractVersion,\n disableLog: utils.disableLog,\n disableWarnings: utils.disableWarnings,\n // Expose sdp as a convenience. For production apps include directly.\n sdp,\n };\n\n // Shim browser if found.\n switch (browserDetails.browser) {\n case 'chrome':\n if (!chromeShim || !chromeShim.shimPeerConnection ||\n !options.shimChrome) {\n logging('Chrome shim is not included in this adapter release.');\n return adapter;\n }\n if (browserDetails.version === null) {\n logging('Chrome shim can not determine version, not shimming.');\n return adapter;\n }\n logging('adapter.js shimming chrome.');\n // Export to the adapter global object visible in the browser.\n adapter.browserShim = chromeShim;\n\n // Must be called before shimPeerConnection.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n commonShim.shimParameterlessSetLocalDescription(window, browserDetails);\n\n chromeShim.shimGetUserMedia(window, browserDetails);\n chromeShim.shimMediaStream(window, browserDetails);\n chromeShim.shimPeerConnection(window, browserDetails);\n chromeShim.shimOnTrack(window, browserDetails);\n chromeShim.shimAddTrackRemoveTrack(window, browserDetails);\n chromeShim.shimGetSendersWithDtmf(window, browserDetails);\n chromeShim.shimGetStats(window, browserDetails);\n chromeShim.shimSenderReceiverGetStats(window, browserDetails);\n chromeShim.fixNegotiationNeeded(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimRTCIceCandidateRelayProtocol(window, browserDetails);\n commonShim.shimConnectionState(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n commonShim.removeExtmapAllowMixed(window, browserDetails);\n break;\n case 'firefox':\n if (!firefoxShim || !firefoxShim.shimPeerConnection ||\n !options.shimFirefox) {\n logging('Firefox shim is not included in this adapter release.');\n return adapter;\n }\n logging('adapter.js shimming firefox.');\n // Export to the adapter global object visible in the browser.\n adapter.browserShim = firefoxShim;\n\n // Must be called before shimPeerConnection.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n commonShim.shimParameterlessSetLocalDescription(window, browserDetails);\n\n firefoxShim.shimGetUserMedia(window, browserDetails);\n firefoxShim.shimPeerConnection(window, browserDetails);\n firefoxShim.shimOnTrack(window, browserDetails);\n firefoxShim.shimRemoveStream(window, browserDetails);\n firefoxShim.shimSenderGetStats(window, browserDetails);\n firefoxShim.shimReceiverGetStats(window, browserDetails);\n firefoxShim.shimRTCDataChannel(window, browserDetails);\n firefoxShim.shimAddTransceiver(window, browserDetails);\n firefoxShim.shimGetParameters(window, browserDetails);\n firefoxShim.shimCreateOffer(window, browserDetails);\n firefoxShim.shimCreateAnswer(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimConnectionState(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n break;\n case 'safari':\n if (!safariShim || !options.shimSafari) {\n logging('Safari shim is not included in this adapter release.');\n return adapter;\n }\n logging('adapter.js shimming safari.');\n // Export to the adapter global object visible in the browser.\n adapter.browserShim = safariShim;\n\n // Must be called before shimCallbackAPI.\n commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);\n commonShim.shimParameterlessSetLocalDescription(window, browserDetails);\n\n safariShim.shimRTCIceServerUrls(window, browserDetails);\n safariShim.shimCreateOfferLegacy(window, browserDetails);\n safariShim.shimCallbacksAPI(window, browserDetails);\n safariShim.shimLocalStreamsAPI(window, browserDetails);\n safariShim.shimRemoteStreamsAPI(window, browserDetails);\n safariShim.shimTrackEventTransceiver(window, browserDetails);\n safariShim.shimGetUserMedia(window, browserDetails);\n safariShim.shimAudioContext(window, browserDetails);\n\n commonShim.shimRTCIceCandidate(window, browserDetails);\n commonShim.shimRTCIceCandidateRelayProtocol(window, browserDetails);\n commonShim.shimMaxMessageSize(window, browserDetails);\n commonShim.shimSendThrowTypeError(window, browserDetails);\n commonShim.removeExtmapAllowMixed(window, browserDetails);\n break;\n default:\n logging('Unsupported browser!');\n break;\n }\n\n return adapter;\n}\n","/*\n * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.\n *\n * Use of this source code is governed by a BSD-style license\n * that can be found in the LICENSE file in the root of the source\n * tree.\n */\n/* eslint-env node */\n\n'use strict';\n\nimport {adapterFactory} from './adapter_factory.js';\n\nconst adapter =\n adapterFactory({window: typeof window === 'undefined' ? undefined : window});\nexport default adapter;\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\n/**\n * GStreamer WebRTC configuration.\n * <p>The config can be passed on creation of the GstWebRTCAPI class.</p>\n * <p>For example:\n * <pre>\n * const signalingProtocol = window.location.protocol.startsWith(\"https\") ? \"wss\" : \"ws\";\n * const api = new GstWebRTCAPI({\n * meta: { name: `WebClient-${Date.now()}` },\n * signalingServerUrl: `${signalingProtocol}://${window.location.host}/webrtc`\n * });\n * </pre></p>\n * @typedef {object} GstWebRTCConfig\n * @property {object} meta=null - Client free-form information that will be exchanged with all peers through the\n * signaling <i>meta</i> property, its content depends on your application.\n * @property {string} signalingServerUrl=ws://127.0.0.1:8443 - The WebRTC signaling server URL.\n * @property {number} reconnectionTimeout=2500 - Timeout in milliseconds to reconnect to the signaling server in\n * case of an unexpected disconnection.\n * @property {object} webrtcConfig={iceServers...} - The WebRTC peer connection configuration passed to\n * {@link external:RTCPeerConnection}. Default configuration only includes a list of free STUN servers\n * (<i>stun[0-4].l.google.com:19302</i>).\n */\nconst defaultConfig = Object.freeze({\n meta: null,\n signalingServerUrl: \"ws://127.0.0.1:8443\",\n reconnectionTimeout: 2500,\n webrtcConfig: {\n iceServers: [\n {\n urls: [\n \"stun:stun.l.google.com:19302\",\n \"stun:stun1.l.google.com:19302\"\n ]\n }\n ]\n }\n});\n\nexport { defaultConfig as default };\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\n/**\n * Session states enumeration.<br>\n * Session state always increases from idle to closed and never switches backwards.\n * @typedef {enum} GstWebRTCAPI.SessionState\n * @readonly\n * @property {0} idle - Default state when creating a new session, goes to <i>connecting</i> when starting\n * the session.\n * @property {1} connecting - Session is trying to connect to remote peers, goes to <i>streaming</i> in case of\n * success or <i>closed</i> in case of error.\n * @property {2} streaming - Session is correctly connected to remote peers and currently streaming audio/video, goes\n * to <i>closed</i> when any peer closes the session.\n * @property {3} closed - Session is closed and can be garbage collected, state will not change anymore.\n */\nconst SessionState = Object.freeze({\n idle: 0,\n connecting: 1,\n streaming: 2,\n closed: 3\n});\n\nexport { SessionState as default };\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport SessionState from \"./session-state.js\";\n\n/**\n * Event name: \"error\".<br>\n * Triggered when any kind of error occurs.\n * <p>When emitted by a session, it is in general an unrecoverable error. Normally, the session is automatically closed\n * but in the specific case of a {@link GstWebRTCAPI.ProducerSession}, when the error occurs on an underlying\n * {@link GstWebRTCAPI.ClientSession} between the producer session and a remote client consuming the streamed media,\n * then only the failing {@link GstWebRTCAPI.ClientSession} is closed. The producer session can keep on serving the\n * other consumer peers.</p>\n * @event GstWebRTCAPI#ErrorEvent\n * @type {external:ErrorEvent}\n * @property {string} message - The error message.\n * @property {external:Error} error - The error exception.\n * @see GstWebRTCAPI.WebRTCSession\n * @see GstWebRTCAPI.RemoteController\n */\n/**\n * Event name: \"stateChanged\".<br>\n * Triggered each time a session state changes.\n * @event GstWebRTCAPI#StateChangedEvent\n * @type {external:Event}\n * @see GstWebRTCAPI.WebRTCSession#state\n */\n/**\n * Event name: \"rtcPeerConnectionChanged\".<br>\n * Triggered each time a session internal {@link external:RTCPeerConnection} changes. This can occur during the session\n * connecting state when the peer-to-peer WebRTC connection is established, and when closing the\n * {@link GstWebRTCAPI.WebRTCSession}.\n * @event GstWebRTCAPI#RTCPeerConnectionChangedEvent\n * @type {external:Event}\n * @see GstWebRTCAPI.WebRTCSession#rtcPeerConnection\n */\n/**\n * Event name: \"closed\".<br>\n * Triggered when a session is definitively closed (then it can be garbage collected as session instances are not\n * reusable).\n * @event GstWebRTCAPI#ClosedEvent\n * @type {external:Event}\n */\n\n/**\n * @class GstWebRTCAPI.WebRTCSession\n * @hideconstructor\n * @classdesc Manages a WebRTC session between a producer and a consumer (peer-to-peer channel).\n * @extends {external:EventTarget}\n * @fires {@link GstWebRTCAPI#event:ErrorEvent}\n * @fires {@link GstWebRTCAPI#event:StateChangedEvent}\n * @fires {@link GstWebRTCAPI#event:RTCPeerConnectionChangedEvent}\n * @fires {@link GstWebRTCAPI#event:ClosedEvent}\n * @see GstWebRTCAPI.ConsumerSession\n * @see GstWebRTCAPI.ProducerSession\n * @see GstWebRTCAPI.ClientSession\n */\nexport default class WebRTCSession extends EventTarget {\n constructor(peerId, comChannel) {\n super();\n\n this._peerId = peerId;\n this._sessionId = \"\";\n this._comChannel = comChannel;\n this._state = SessionState.idle;\n this._rtcPeerConnection = null;\n }\n\n /**\n * Unique identifier of the remote peer to which this session is connected.\n * @member {string} GstWebRTCAPI.WebRTCSession#peerId\n * @readonly\n */\n get peerId() {\n return this._peerId;\n }\n\n /**\n * Unique identifier of this session (defined by the signaling server).<br>\n * The local session ID equals \"\" until it is created on server side. This is done during the connection handshake.\n * The local session ID is guaranteed to be valid and to correctly reflect the signaling server value once\n * session state has switched to {@link GstWebRTCAPI.SessionState#streaming}.\n * @member {string} GstWebRTCAPI.WebRTCSession#sessionId\n * @readonly\n */\n get sessionId() {\n return this._sessionId;\n }\n\n /**\n * The current WebRTC session state.\n * @member {GstWebRTCAPI.SessionState} GstWebRTCAPI.WebRTCSession#state\n * @readonly\n */\n get state() {\n return this._state;\n }\n\n /**\n * The internal {@link external:RTCPeerConnection} used to manage the underlying WebRTC connection with session\n * peer. Value may be null if session has no active WebRTC connection. You can listen to the\n * {@link GstWebRTCAPI#event:RTCPeerConnectionChangedEvent} event to be informed when the connection is established\n * or destroyed.\n * @member {external:RTCPeerConnection} GstWebRTCAPI.WebRTCSession#rtcPeerConnection\n * @readonly\n */\n get rtcPeerConnection() {\n return this._rtcPeerConnection;\n }\n\n /**\n * Terminates the WebRTC session.<br>\n * It immediately disconnects the remote peer attached to this session and unregisters the session from the\n * signaling server.\n * @method GstWebRTCAPI.WebRTCSession#close\n */\n close() {\n if (this._state !== SessionState.closed) {\n if ((this._state !== SessionState.idle) && this._comChannel && this._sessionId) {\n this._comChannel.send({\n type: \"endSession\",\n sessionId: this._sessionId\n });\n }\n\n this._state = SessionState.closed;\n this.dispatchEvent(new Event(\"stateChanged\"));\n\n this._comChannel = null;\n\n if (this._rtcPeerConnection) {\n this._rtcPeerConnection.close();\n this._rtcPeerConnection = null;\n this.dispatchEvent(new Event(\"rtcPeerConnectionChanged\"));\n }\n\n this.dispatchEvent(new Event(\"closed\"));\n }\n }\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\n// mapping is based on https://www.cl.cam.ac.uk/~mgk25/ucs/keysyms.txt\nconst uniToKeySyms = Object.freeze({\n 0x0020: \"space\",\n 0x0021: \"exclam\",\n 0x0022: \"quotedbl\",\n 0x0023: \"numbersign\",\n 0x0024: \"dollar\",\n 0x0025: \"percent\",\n 0x0026: \"ampersand\",\n 0x0027: \"apostrophe\",\n 0x0028: \"parenleft\",\n 0x0029: \"parenright\",\n 0x002a: \"asterisk\",\n 0x002b: \"plus\",\n 0x002c: \"comma\",\n 0x002d: \"minus\",\n 0x002e: \"period\",\n 0x002f: \"slash\",\n 0x0030: \"0\",\n 0x0031: \"1\",\n 0x0032: \"2\",\n 0x0033: \"3\",\n 0x0034: \"4\",\n 0x0035: \"5\",\n 0x0036: \"6\",\n 0x0037: \"7\",\n 0x0038: \"8\",\n 0x0039: \"9\",\n 0x003a: \"colon\",\n 0x003b: \"semicolon\",\n 0x003c: \"less\",\n 0x003d: \"equal\",\n 0x003e: \"greater\",\n 0x003f: \"question\",\n 0x0040: \"at\",\n 0x0041: \"A\",\n 0x0042: \"B\",\n 0x0043: \"C\",\n 0x0044: \"D\",\n 0x0045: \"E\",\n 0x0046: \"F\",\n 0x0047: \"G\",\n 0x0048: \"H\",\n 0x0049: \"I\",\n 0x004a: \"J\",\n 0x004b: \"K\",\n 0x004c: \"L\",\n 0x004d: \"M\",\n 0x004e: \"N\",\n 0x004f: \"O\",\n 0x0050: \"P\",\n 0x0051: \"Q\",\n 0x0052: \"R\",\n 0x0053: \"S\",\n 0x0054: \"T\",\n 0x0055: \"U\",\n 0x0056: \"V\",\n 0x0057: \"W\",\n 0x0058: \"X\",\n 0x0059: \"Y\",\n 0x005a: \"Z\",\n 0x005b: \"bracketleft\",\n 0x005c: \"backslash\",\n 0x005d: \"bracketright\",\n 0x005e: \"asciicircum\",\n 0x005f: \"underscore\",\n 0x0060: \"grave\",\n 0x0061: \"a\",\n 0x0062: \"b\",\n 0x0063: \"c\",\n 0x0064: \"d\",\n 0x0065: \"e\",\n 0x0066: \"f\",\n 0x0067: \"g\",\n 0x0068: \"h\",\n 0x0069: \"i\",\n 0x006a: \"j\",\n 0x006b: \"k\",\n 0x006c: \"l\",\n 0x006d: \"m\",\n 0x006e: \"n\",\n 0x006f: \"o\",\n 0x0070: \"p\",\n 0x0071: \"q\",\n 0x0072: \"r\",\n 0x0073: \"s\",\n 0x0074: \"t\",\n 0x0075: \"u\",\n 0x0076: \"v\",\n 0x0077: \"w\",\n 0x0078: \"x\",\n 0x0079: \"y\",\n 0x007a: \"z\",\n 0x007b: \"braceleft\",\n 0x007c: \"bar\",\n 0x007d: \"braceright\",\n 0x007e: \"asciitilde\",\n 0x00a0: \"nobreakspace\",\n 0x00a1: \"exclamdown\",\n 0x00a2: \"cent\",\n 0x00a3: \"sterling\",\n 0x00a4: \"currency\",\n 0x00a5: \"yen\",\n 0x00a6: \"brokenbar\",\n 0x00a7: \"section\",\n 0x00a8: \"diaeresis\",\n 0x00a9: \"copyright\",\n 0x00aa: \"ordfeminine\",\n 0x00ab: \"guillemotleft\",\n 0x00ac: \"notsign\",\n 0x00ad: \"hyphen\",\n 0x00ae: \"registered\",\n 0x00af: \"macron\",\n 0x00b0: \"degree\",\n 0x00b1: \"plusminus\",\n 0x00b2: \"twosuperior\",\n 0x00b3: \"threesuperior\",\n 0x00b4: \"acute\",\n 0x00b5: \"mu\",\n 0x00b6: \"paragraph\",\n 0x00b7: \"periodcentered\",\n 0x00b8: \"cedilla\",\n 0x00b9: \"onesuperior\",\n 0x00ba: \"masculine\",\n 0x00bb: \"guillemotright\",\n 0x00bc: \"onequarter\",\n 0x00bd: \"onehalf\",\n 0x00be: \"threequarters\",\n 0x00bf: \"questiondown\",\n 0x00c0: \"Agrave\",\n 0x00c1: \"Aacute\",\n 0x00c2: \"Acircumflex\",\n 0x00c3: \"Atilde\",\n 0x00c4: \"Adiaeresis\",\n 0x00c5: \"Aring\",\n 0x00c6: \"AE\",\n 0x00c7: \"Ccedilla\",\n 0x00c8: \"Egrave\",\n 0x00c9: \"Eacute\",\n 0x00ca: \"Ecircumflex\",\n 0x00cb: \"Ediaeresis\",\n 0x00cc: \"Igrave\",\n 0x00cd: \"Iacute\",\n 0x00ce: \"Icircumflex\",\n 0x00cf: \"Idiaeresis\",\n 0x00d0: \"ETH\",\n 0x00d1: \"Ntilde\",\n 0x00d2: \"Ograve\",\n 0x00d3: \"Oacute\",\n 0x00d4: \"Ocircumflex\",\n 0x00d5: \"Otilde\",\n 0x00d6: \"Odiaeresis\",\n 0x00d7: \"multiply\",\n 0x00d8: \"Ooblique\",\n 0x00d9: \"Ugrave\",\n 0x00da: \"Uacute\",\n 0x00db: \"Ucircumflex\",\n 0x00dc: \"Udiaeresis\",\n 0x00dd: \"Yacute\",\n 0x00de: \"THORN\",\n 0x00df: \"ssharp\",\n 0x00e0: \"agrave\",\n 0x00e1: \"aacute\",\n 0x00e2: \"acircumflex\",\n 0x00e3: \"atilde\",\n 0x00e4: \"adiaeresis\",\n 0x00e5: \"aring\",\n 0x00e6: \"ae\",\n 0x00e7: \"ccedilla\",\n 0x00e8: \"egrave\",\n 0x00e9: \"eacute\",\n 0x00ea: \"ecircumflex\",\n 0x00eb: \"ediaeresis\",\n 0x00ec: \"igrave\",\n 0x00ed: \"iacute\",\n 0x00ee: \"icircumflex\",\n 0x00ef: \"idiaeresis\",\n 0x00f0: \"eth\",\n 0x00f1: \"ntilde\",\n 0x00f2: \"ograve\",\n 0x00f3: \"oacute\",\n 0x00f4: \"ocircumflex\",\n 0x00f5: \"otilde\",\n 0x00f6: \"odiaeresis\",\n 0x00f7: \"division\",\n 0x00f8: \"oslash\",\n 0x00f9: \"ugrave\",\n 0x00fa: \"uacute\",\n 0x00fb: \"ucircumflex\",\n 0x00fc: \"udiaeresis\",\n 0x00fd: \"yacute\",\n 0x00fe: \"thorn\",\n 0x00ff: \"ydiaeresis\",\n 0x0104: \"Aogonek\",\n 0x02d8: \"breve\",\n 0x0141: \"Lstroke\",\n 0x013d: \"Lcaron\",\n 0x015a: \"Sacute\",\n 0x0160: \"Scaron\",\n 0x015e: \"Scedilla\",\n 0x0164: \"Tcaron\",\n 0x0179: \"Zacute\",\n 0x017d: \"Zcaron\",\n 0x017b: \"Zabovedot\",\n 0x0105: \"aogonek\",\n 0x02db: \"ogonek\",\n 0x0142: \"lstroke\",\n 0x013e: \"lcaron\",\n 0x015b: \"sacute\",\n 0x02c7: \"caron\",\n 0x0161: \"scaron\",\n 0x015f: \"scedilla\",\n 0x0165: \"tcaron\",\n 0x017a: \"zacute\",\n 0x02dd: \"doubleacute\",\n 0x017e: \"zcaron\",\n 0x017c: \"zabovedot\",\n 0x0154: \"Racute\",\n 0x0102: \"Abreve\",\n 0x0139: \"Lacute\",\n 0x0106: \"Cacute\",\n 0x010c: \"Ccaron\",\n 0x0118: \"Eogonek\",\n 0x011a: \"Ecaron\",\n 0x010e: \"Dcaron\",\n 0x0110: \"Dstroke\",\n 0x0143: \"Nacute\",\n 0x0147: \"Ncaron\",\n 0x0150: \"Odoubleacute\",\n 0x0158: \"Rcaron\",\n 0x016e: \"Uring\",\n 0x0170: \"Udoubleacute\",\n 0x0162: \"Tcedilla\",\n 0x0155: \"racute\",\n 0x0103: \"abreve\",\n 0x013a: \"lacute\",\n 0x0107: \"cacute\",\n 0x010d: \"ccaron\",\n 0x0119: \"eogonek\",\n 0x011b: \"ecaron\",\n 0x010f: \"dcaron\",\n 0x0111: \"dstroke\",\n 0x0144: \"nacute\",\n 0x0148: \"ncaron\",\n 0x0151: \"odoubleacute\",\n 0x0159: \"rcaron\",\n 0x016f: \"uring\",\n 0x0171: \"udoubleacute\",\n 0x0163: \"tcedilla\",\n 0x02d9: \"abovedot\",\n 0x0126: \"Hstroke\",\n 0x0124: \"Hcircumflex\",\n 0x0130: \"Iabovedot\",\n 0x011e: \"Gbreve\",\n 0x0134: \"Jcircumflex\",\n 0x0127: \"hstroke\",\n 0x0125: \"hcircumflex\",\n 0x0131: \"idotless\",\n 0x011f: \"gbreve\",\n 0x0135: \"jcircumflex\",\n 0x010a: \"Cabovedot\",\n 0x0108: \"Ccircumflex\",\n 0x0120: \"Gabovedot\",\n 0x011c: \"Gcircumflex\",\n 0x016c: \"Ubreve\",\n 0x015c: \"Scircumflex\",\n 0x010b: \"cabovedot\",\n 0x0109: \"ccircumflex\",\n 0x0121: \"gabovedot\",\n 0x011d: \"gcircumflex\",\n 0x016d: \"ubreve\",\n 0x015d: \"scircumflex\",\n 0x0138: \"kra\",\n 0x0156: \"Rcedilla\",\n 0x0128: \"Itilde\",\n 0x013b: \"Lcedilla\",\n 0x0112: \"Emacron\",\n 0x0122: \"Gcedilla\",\n 0x0166: \"Tslash\",\n 0x0157: \"rcedilla\",\n 0x0129: \"itilde\",\n 0x013c: \"lcedilla\",\n 0x0113: \"emacron\",\n 0x0123: \"gcedilla\",\n 0x0167: \"tslash\",\n 0x014a: \"ENG\",\n 0x014b: \"eng\",\n 0x0100: \"Amacron\",\n 0x012e: \"Iogonek\",\n 0x0116: \"Eabovedot\",\n 0x012a: \"Imacron\",\n 0x0145: \"Ncedilla\",\n 0x014c: \"Omacron\",\n 0x0136: \"Kcedilla\",\n 0x0172: \"Uogonek\",\n 0x0168: \"Utilde\",\n 0x016a: \"Umacron\",\n 0x0101: \"amacron\",\n 0x012f: \"iogonek\",\n 0x0117: \"eabovedot\",\n 0x012b: \"imacron\",\n 0x0146: \"ncedilla\",\n 0x014d: \"omacron\",\n 0x0137: \"kcedilla\",\n 0x0173: \"uogonek\",\n 0x0169: \"utilde\",\n 0x016b: \"umacron\",\n 0x203e: \"overline\",\n 0x3002: \"kana_fullstop\",\n 0x300c: \"kana_openingbracket\",\n 0x300d: \"kana_closingbracket\",\n 0x3001: \"kana_comma\",\n 0x30fb: \"kana_conjunctive\",\n 0x30f2: \"kana_WO\",\n 0x30a1: \"kana_a\",\n 0x30a3: \"kana_i\",\n 0x30a5: \"kana_u\",\n 0x30a7: \"kana_e\",\n 0x30a9: \"kana_o\",\n 0x30e3: \"kana_ya\",\n 0x30e5: \"kana_yu\",\n 0x30e7: \"kana_yo\",\n 0x30c3: \"kana_tsu\",\n 0x30fc: \"prolongedsound\",\n 0x30a2: \"kana_A\",\n 0x30a4: \"kana_I\",\n 0x30a6: \"kana_U\",\n 0x30a8: \"kana_E\",\n 0x30aa: \"kana_O\",\n 0x30ab: \"kana_KA\",\n 0x30ad: \"kana_KI\",\n 0x30af: \"kana_KU\",\n 0x30b1: \"kana_KE\",\n 0x30b3: \"kana_KO\",\n 0x30b5: \"kana_SA\",\n 0x30b7: \"kana_SHI\",\n 0x30b9: \"kana_SU\",\n 0x30bb: \"kana_SE\",\n 0x30bd: \"kana_SO\",\n 0x30bf: \"kana_TA\",\n 0x30c1: \"kana_CHI\",\n 0x30c4: \"kana_TSU\",\n 0x30c6: \"kana_TE\",\n 0x30c8: \"kana_TO\",\n 0x30ca: \"kana_NA\",\n 0x30cb: \"kana_NI\",\n 0x30cc: \"kana_NU\",\n 0x30cd: \"kana_NE\",\n 0x30ce: \"kana_NO\",\n 0x30cf: \"kana_HA\",\n 0x30d2: \"kana_HI\",\n 0x30d5: \"kana_FU\",\n 0x30d8: \"kana_HE\",\n 0x30db: \"kana_HO\",\n 0x30de: \"kana_MA\",\n 0x30df: \"kana_MI\",\n 0x30e0: \"kana_MU\",\n 0x30e1: \"kana_ME\",\n 0x30e2: \"kana_MO\",\n 0x30e4: \"kana_YA\",\n 0x30e6: \"kana_YU\",\n 0x30e8: \"kana_YO\",\n 0x30e9: \"kana_RA\",\n 0x30ea: \"kana_RI\",\n 0x30eb: \"kana_RU\",\n 0x30ec: \"kana_RE\",\n 0x30ed: \"kana_RO\",\n 0x30ef: \"kana_WA\",\n 0x30f3: \"kana_N\",\n 0x309b: \"voicedsound\",\n 0x309c: \"semivoicedsound\",\n 0x060c: \"Arabic_comma\",\n 0x061b: \"Arabic_semicolon\",\n 0x061f: \"Arabic_question_mark\",\n 0x0621: \"Arabic_hamza\",\n 0x0622: \"Arabic_maddaonalef\",\n 0x0623: \"Arabic_hamzaonalef\",\n 0x0624: \"Arabic_hamzaonwaw\",\n 0x0625: \"Arabic_hamzaunderalef\",\n 0x0626: \"Arabic_hamzaonyeh\",\n 0x0627: \"Arabic_alef\",\n 0x0628: \"Arabic_beh\",\n 0x0629: \"Arabic_tehmarbuta\",\n 0x062a: \"Arabic_teh\",\n 0x062b: \"Arabic_theh\",\n 0x062c: \"Arabic_jeem\",\n 0x062d: \"Arabic_hah\",\n 0x062e: \"Arabic_khah\",\n 0x062f: \"Arabic_dal\",\n 0x0630: \"Arabic_thal\",\n 0x0631: \"Arabic_ra\",\n 0x0632: \"Arabic_zain\",\n 0x0633: \"Arabic_seen\",\n 0x0634: \"Arabic_sheen\",\n 0x0635: \"Arabic_sad\",\n 0x0636: \"Arabic_dad\",\n 0x0637: \"Arabic_tah\",\n 0x0638: \"Arabic_zah\",\n 0x0639: \"Arabic_ain\",\n 0x063a: \"Arabic_ghain\",\n 0x0640: \"Arabic_tatweel\",\n 0x0641: \"Arabic_feh\",\n 0x0642: \"Arabic_qaf\",\n 0x0643: \"Arabic_kaf\",\n 0x0644: \"Arabic_lam\",\n 0x0645: \"Arabic_meem\",\n 0x0646: \"Arabic_noon\",\n 0x0647: \"Arabic_ha\",\n 0x0648: \"Arabic_waw\",\n 0x0649: \"Arabic_alefmaksura\",\n 0x064a: \"Arabic_yeh\",\n 0x064b: \"Arabic_fathatan\",\n 0x064c: \"Arabic_dammatan\",\n 0x064d: \"Arabic_kasratan\",\n 0x064e: \"Arabic_fatha\",\n 0x064f: \"Arabic_damma\",\n 0x0650: \"Arabic_kasra\",\n 0x0651: \"Arabic_shadda\",\n 0x0652: \"Arabic_sukun\",\n 0x0452: \"Serbian_dje\",\n 0x0453: \"Macedonia_gje\",\n 0x0451: \"Cyrillic_io\",\n 0x0454: \"Ukrainian_ie\",\n 0x0455: \"Macedonia_dse\",\n 0x0456: \"Ukrainian_i\",\n 0x0457: \"Ukrainian_yi\",\n 0x0458: \"Cyrillic_je\",\n 0x0459: \"Cyrillic_lje\",\n 0x045a: \"Cyrillic_nje\",\n 0x045b: \"Serbian_tshe\",\n 0x045c: \"Macedonia_kje\",\n 0x045e: \"Byelorussian_shortu\",\n 0x045f: \"Cyrillic_dzhe\",\n 0x2116: \"numerosign\",\n 0x0402: \"Serbian_DJE\",\n 0x0403: \"Macedonia_GJE\",\n 0x0401: \"Cyrillic_IO\",\n 0x0404: \"Ukrainian_IE\",\n 0x0405: \"Macedonia_DSE\",\n 0x0406: \"Ukrainian_I\",\n 0x0407: \"Ukrainian_YI\",\n 0x0408: \"Cyrillic_JE\",\n 0x0409: \"Cyrillic_LJE\",\n 0x040a: \"Cyrillic_NJE\",\n 0x040b: \"Serbian_TSHE\",\n 0x040c: \"Macedonia_KJE\",\n 0x040e: \"Byelorussian_SHORTU\",\n 0x040f: \"Cyrillic_DZHE\",\n 0x044e: \"Cyrillic_yu\",\n 0x0430: \"Cyrillic_a\",\n 0x0431: \"Cyrillic_be\",\n 0x0446: \"Cyrillic_tse\",\n 0x0434: \"Cyrillic_de\",\n 0x0435: \"Cyrillic_ie\",\n 0x0444: \"Cyrillic_ef\",\n 0x0433: \"Cyrillic_ghe\",\n 0x0445: \"Cyrillic_ha\",\n 0x0438: \"Cyrillic_i\",\n 0x0439: \"Cyrillic_shorti\",\n 0x043a: \"Cyrillic_ka\",\n 0x043b: \"Cyrillic_el\",\n 0x043c: \"Cyrillic_em\",\n 0x043d: \"Cyrillic_en\",\n 0x043e: \"Cyrillic_o\",\n 0x043f: \"Cyrillic_pe\",\n 0x044f: \"Cyrillic_ya\",\n 0x0440: \"Cyrillic_er\",\n 0x0441: \"Cyrillic_es\",\n 0x0442: \"Cyrillic_te\",\n 0x0443: \"Cyrillic_u\",\n 0x0436: \"Cyrillic_zhe\",\n 0x0432: \"Cyrillic_ve\",\n 0x044c: \"Cyrillic_softsign\",\n 0x044b: \"Cyrillic_yeru\",\n 0x0437: \"Cyrillic_ze\",\n 0x0448: \"Cyrillic_sha\",\n 0x044d: \"Cyrillic_e\",\n 0x0449: \"Cyrillic_shcha\",\n 0x0447: \"Cyrillic_che\",\n 0x044a: \"Cyrillic_hardsign\",\n 0x042e: \"Cyrillic_YU\",\n 0x0410: \"Cyrillic_A\",\n 0x0411: \"Cyrillic_BE\",\n 0x0426: \"Cyrillic_TSE\",\n 0x0414: \"Cyrillic_DE\",\n 0x0415: \"Cyrillic_IE\",\n 0x0424: \"Cyrillic_EF\",\n 0x0413: \"Cyrillic_GHE\",\n 0x0425: \"Cyrillic_HA\",\n 0x0418: \"Cyrillic_I\",\n 0x0419: \"Cyrillic_SHORTI\",\n 0x041a: \"Cyrillic_KA\",\n 0x041b: \"Cyrillic_EL\",\n 0x041c: \"Cyrillic_EM\",\n 0x041d: \"Cyrillic_EN\",\n 0x041e: \"Cyrillic_O\",\n 0x041f: \"Cyrillic_PE\",\n 0x042f: \"Cyrillic_YA\",\n 0x0420: \"Cyrillic_ER\",\n 0x0421: \"Cyrillic_ES\",\n 0x0422: \"Cyrillic_TE\",\n 0x0423: \"Cyrillic_U\",\n 0x0416: \"Cyrillic_ZHE\",\n 0x0412: \"Cyrillic_VE\",\n 0x042c: \"Cyrillic_SOFTSIGN\",\n 0x042b: \"Cyrillic_YERU\",\n 0x0417: \"Cyrillic_ZE\",\n 0x0428: \"Cyrillic_SHA\",\n 0x042d: \"Cyrillic_E\",\n 0x0429: \"Cyrillic_SHCHA\",\n 0x0427: \"Cyrillic_CHE\",\n 0x042a: \"Cyrillic_HARDSIGN\",\n 0x0386: \"Greek_ALPHAaccent\",\n 0x0388: \"Greek_EPSILONaccent\",\n 0x0389: \"Greek_ETAaccent\",\n 0x038a: \"Greek_IOTAaccent\",\n 0x03aa: \"Greek_IOTAdiaeresis\",\n 0x038c: \"Greek_OMICRONaccent\",\n 0x038e: \"Greek_UPSILONaccent\",\n 0x03ab: \"Greek_UPSILONdieresis\",\n 0x038f: \"Greek_OMEGAaccent\",\n 0x0385: \"Greek_accentdieresis\",\n 0x2015: \"Greek_horizbar\",\n 0x03ac: \"Greek_alphaaccent\",\n 0x03ad: \"Greek_epsilonaccent\",\n 0x03ae: \"Greek_etaaccent\",\n 0x03af: \"Greek_iotaaccent\",\n 0x03ca: \"Greek_iotadieresis\",\n 0x0390: \"Greek_iotaaccentdieresis\",\n 0x03cc: \"Greek_omicronaccent\",\n 0x03cd: \"Greek_upsilonaccent\",\n 0x03cb: \"Greek_upsilondieresis\",\n 0x03b0: \"Greek_upsilonaccentdieresis\",\n 0x03ce: \"Greek_omegaaccent\",\n 0x0391: \"Greek_ALPHA\",\n 0x0392: \"Greek_BETA\",\n 0x0393: \"Greek_GAMMA\",\n 0x0394: \"Greek_DELTA\",\n 0x0395: \"Greek_EPSILON\",\n 0x0396: \"Greek_ZETA\",\n 0x0397: \"Greek_ETA\",\n 0x0398: \"Greek_THETA\",\n 0x0399: \"Greek_IOTA\",\n 0x039a: \"Greek_KAPPA\",\n 0x039b: \"Greek_LAMBDA\",\n 0x039c: \"Greek_MU\",\n 0x039d: \"Greek_NU\",\n 0x039e: \"Greek_XI\",\n 0x039f: \"Greek_OMICRON\",\n 0x03a0: \"Greek_PI\",\n 0x03a1: \"Greek_RHO\",\n 0x03a3: \"Greek_SIGMA\",\n 0x03a4: \"Greek_TAU\",\n 0x03a5: \"Greek_UPSILON\",\n 0x03a6: \"Greek_PHI\",\n 0x03a7: \"Greek_CHI\",\n 0x03a8: \"Greek_PSI\",\n 0x03a9: \"Greek_OMEGA\",\n 0x03b1: \"Greek_alpha\",\n 0x03b2: \"Greek_beta\",\n 0x03b3: \"Greek_gamma\",\n 0x03b4: \"Greek_delta\",\n 0x03b5: \"Greek_epsilon\",\n 0x03b6: \"Greek_zeta\",\n 0x03b7: \"Greek_eta\",\n 0x03b8: \"Greek_theta\",\n 0x03b9: \"Greek_iota\",\n 0x03ba: \"Greek_kappa\",\n 0x03bb: \"Greek_lambda\",\n 0x03bc: \"Greek_mu\",\n 0x03bd: \"Greek_nu\",\n 0x03be: \"Greek_xi\",\n 0x03bf: \"Greek_omicron\",\n 0x03c0: \"Greek_pi\",\n 0x03c1: \"Greek_rho\",\n 0x03c3: \"Greek_sigma\",\n 0x03c2: \"Greek_finalsmallsigma\",\n 0x03c4: \"Greek_tau\",\n 0x03c5: \"Greek_upsilon\",\n 0x03c6: \"Greek_phi\",\n 0x03c7: \"Greek_chi\",\n 0x03c8: \"Greek_psi\",\n 0x03c9: \"Greek_omega\",\n 0x23b7: \"leftradical\",\n 0x2320: \"topintegral\",\n 0x2321: \"botintegral\",\n 0x23a1: \"topleftsqbracket\",\n 0x23a3: \"botleftsqbracket\",\n 0x23a4: \"toprightsqbracket\",\n 0x23a6: \"botrightsqbracket\",\n 0x239b: \"topleftparens\",\n 0x239d: \"botleftparens\",\n 0x239e: \"toprightparens\",\n 0x23a0: \"botrightparens\",\n 0x23a8: \"leftmiddlecurlybrace\",\n 0x23ac: \"rightmiddlecurlybrace\",\n 0x2264: \"lessthanequal\",\n 0x2260: \"notequal\",\n 0x2265: \"greaterthanequal\",\n 0x222b: \"integral\",\n 0x2234: \"therefore\",\n 0x221d: \"variation\",\n 0x221e: \"infinity\",\n 0x2207: \"nabla\",\n 0x223c: \"approximate\",\n 0x2243: \"similarequal\",\n 0x21d4: \"ifonlyif\",\n 0x21d2: \"implies\",\n 0x2261: \"identical\",\n 0x221a: \"radical\",\n 0x2282: \"includedin\",\n 0x2283: \"includes\",\n 0x2229: \"intersection\",\n 0x222a: \"union\",\n 0x2227: \"logicaland\",\n 0x2228: \"logicalor\",\n 0x2202: \"partialderivative\",\n 0x0192: \"function\",\n 0x2190: \"leftarrow\",\n 0x2191: \"uparrow\",\n 0x2192: \"rightarrow\",\n 0x2193: \"downarrow\",\n 0x25c6: \"soliddiamond\",\n 0x2592: \"checkerboard\",\n 0x2409: \"ht\",\n 0x240c: \"ff\",\n 0x240d: \"cr\",\n 0x240a: \"lf\",\n 0x2424: \"nl\",\n 0x240b: \"vt\",\n 0x2518: \"lowrightcorner\",\n 0x2510: \"uprightcorner\",\n 0x250c: \"upleftcorner\",\n 0x2514: \"lowleftcorner\",\n 0x253c: \"crossinglines\",\n 0x23ba: \"horizlinescan1\",\n 0x23bb: \"horizlinescan3\",\n 0x2500: \"horizlinescan5\",\n 0x23bc: \"horizlinescan7\",\n 0x23bd: \"horizlinescan9\",\n 0x251c: \"leftt\",\n 0x2524: \"rightt\",\n 0x2534: \"bott\",\n 0x252c: \"topt\",\n 0x2502: \"vertbar\",\n 0x2003: \"emspace\",\n 0x2002: \"enspace\",\n 0x2004: \"em3space\",\n 0x2005: \"em4space\",\n 0x2007: \"digitspace\",\n 0x2008: \"punctspace\",\n 0x2009: \"thinspace\",\n 0x200a: \"hairspace\",\n 0x2014: \"emdash\",\n 0x2013: \"endash\",\n 0x2423: \"signifblank\",\n 0x2026: \"ellipsis\",\n 0x2025: \"doubbaselinedot\",\n 0x2153: \"onethird\",\n 0x2154: \"twothirds\",\n 0x2155: \"onefifth\",\n 0x2156: \"twofifths\",\n 0x2157: \"threefifths\",\n 0x2158: \"fourfifths\",\n 0x2159: \"onesixth\",\n 0x215a: \"fivesixths\",\n 0x2105: \"careof\",\n 0x2012: \"figdash\",\n 0x27e8: \"leftanglebracket\",\n 0x27e9: \"rightanglebracket\",\n 0x215b: \"oneeighth\",\n 0x215c: \"threeeighths\",\n 0x215d: \"fiveeighths\",\n 0x215e: \"seveneighths\",\n 0x2122: \"trademark\",\n 0x2613: \"signaturemark\",\n 0x25c1: \"leftopentriangle\",\n 0x25b7: \"rightopentriangle\",\n 0x25af: \"emopenrectangle\",\n 0x2018: \"leftsinglequotemark\",\n 0x2019: \"rightsinglequotemark\",\n 0x201c: \"leftdoublequotemark\",\n 0x201d: \"rightdoublequotemark\",\n 0x211e: \"prescription\",\n 0x2032: \"minutes\",\n 0x2033: \"seconds\",\n 0x271d: \"latincross\",\n 0x25ac: \"filledrectbullet\",\n 0x25c0: \"filledlefttribullet\",\n 0x25b6: \"filledrighttribullet\",\n 0x25cf: \"emfilledcircle\",\n 0x25ae: \"emfilledrect\",\n 0x25e6: \"enopencircbullet\",\n 0x25ab: \"enopensquarebullet\",\n 0x25ad: \"openrectbullet\",\n 0x25b3: \"opentribulletup\",\n 0x25bd: \"opentribulletdown\",\n 0x2606: \"openstar\",\n 0x2022: \"enfilledcircbullet\",\n 0x25aa: \"enfilledsqbullet\",\n 0x25b2: \"filledtribulletup\",\n 0x25bc: \"filledtribulletdown\",\n 0x261c: \"leftpointer\",\n 0x261e: \"rightpointer\",\n 0x2663: \"club\",\n 0x2666: \"diamond\",\n 0x2665: \"heart\",\n 0x2720: \"maltesecross\",\n 0x2020: \"dagger\",\n 0x2021: \"doubledagger\",\n 0x2713: \"checkmark\",\n 0x2717: \"ballotcross\",\n 0x266f: \"musicalsharp\",\n 0x266d: \"musicalflat\",\n 0x2642: \"malesymbol\",\n 0x2640: \"femalesymbol\",\n 0x260e: \"telephone\",\n 0x2315: \"telephonerecorder\",\n 0x2117: \"phonographcopyright\",\n 0x2038: \"caret\",\n 0x201a: \"singlelowquotemark\",\n 0x201e: \"doublelowquotemark\",\n 0x22a5: \"downtack\",\n 0x230a: \"downstile\",\n 0x2218: \"jot\",\n 0x2395: \"quad\",\n 0x22a4: \"uptack\",\n 0x25cb: \"circle\",\n 0x2308: \"upstile\",\n 0x22a2: \"lefttack\",\n 0x22a3: \"righttack\",\n 0x2017: \"hebrew_doublelowline\",\n 0x05d0: \"hebrew_aleph\",\n 0x05d1: \"hebrew_beth\",\n 0x05d2: \"hebrew_gimmel\",\n 0x05d3: \"hebrew_daleth\",\n 0x05d4: \"hebrew_he\",\n 0x05d5: \"hebrew_waw\",\n 0x05d6: \"hebrew_zayin\",\n 0x05d7: \"hebrew_het\",\n 0x05d8: \"hebrew_teth\",\n 0x05d9: \"hebrew_yod\",\n 0x05da: \"hebrew_finalkaph\",\n 0x05db: \"hebrew_kaph\",\n 0x05dc: \"hebrew_lamed\",\n 0x05dd: \"hebrew_finalmem\",\n 0x05de: \"hebrew_mem\",\n 0x05df: \"hebrew_finalnun\",\n 0x05e0: \"hebrew_nun\",\n 0x05e1: \"hebrew_samekh\",\n 0x05e2: \"hebrew_ayin\",\n 0x05e3: \"hebrew_finalpe\",\n 0x05e4: \"hebrew_pe\",\n 0x05e5: \"hebrew_finalzadi\",\n 0x05e6: \"hebrew_zadi\",\n 0x05e7: \"hebrew_qoph\",\n 0x05e8: \"hebrew_resh\",\n 0x05e9: \"hebrew_shin\",\n 0x05ea: \"hebrew_taw\",\n 0x0e01: \"Thai_kokai\",\n 0x0e02: \"Thai_khokhai\",\n 0x0e03: \"Thai_khokhuat\",\n 0x0e04: \"Thai_khokhwai\",\n 0x0e05: \"Thai_khokhon\",\n 0x0e06: \"Thai_khorakhang\",\n 0x0e07: \"Thai_ngongu\",\n 0x0e08: \"Thai_chochan\",\n 0x0e09: \"Thai_choching\",\n 0x0e0a: \"Thai_chochang\",\n 0x0e0b: \"Thai_soso\",\n 0x0e0c: \"Thai_chochoe\",\n 0x0e0d: \"Thai_yoying\",\n 0x0e0e: \"Thai_dochada\",\n 0x0e0f: \"Thai_topatak\",\n 0x0e10: \"Thai_thothan\",\n 0x0e11: \"Thai_thonangmontho\",\n 0x0e12: \"Thai_thophuthao\",\n 0x0e13: \"Thai_nonen\",\n 0x0e14: \"Thai_dodek\",\n 0x0e15: \"Thai_totao\",\n 0x0e16: \"Thai_thothung\",\n 0x0e17: \"Thai_thothahan\",\n 0x0e18: \"Thai_thothong\",\n 0x0e19: \"Thai_nonu\",\n 0x0e1a: \"Thai_bobaimai\",\n 0x0e1b: \"Thai_popla\",\n 0x0e1c: \"Thai_phophung\",\n 0x0e1d: \"Thai_fofa\",\n 0x0e1e: \"Thai_phophan\",\n 0x0e1f: \"Thai_fofan\",\n 0x0e20: \"Thai_phosamphao\",\n 0x0e21: \"Thai_moma\",\n 0x0e22: \"Thai_yoyak\",\n 0x0e23: \"Thai_rorua\",\n 0x0e24: \"Thai_ru\",\n 0x0e25: \"Thai_loling\",\n 0x0e26: \"Thai_lu\",\n 0x0e27: \"Thai_wowaen\",\n 0x0e28: \"Thai_sosala\",\n 0x0e29: \"Thai_sorusi\",\n 0x0e2a: \"Thai_sosua\",\n 0x0e2b: \"Thai_hohip\",\n 0x0e2c: \"Thai_lochula\",\n 0x0e2d: \"Thai_oang\",\n 0x0e2e: \"Thai_honokhuk\",\n 0x0e2f: \"Thai_paiyannoi\",\n 0x0e30: \"Thai_saraa\",\n 0x0e31: \"Thai_maihanakat\",\n 0x0e32: \"Thai_saraaa\",\n 0x0e33: \"Thai_saraam\",\n 0x0e34: \"Thai_sarai\",\n 0x0e35: \"Thai_saraii\",\n 0x0e36: \"Thai_saraue\",\n 0x0e37: \"Thai_sarauee\",\n 0x0e38: \"Thai_sarau\",\n 0x0e39: \"Thai_sarauu\",\n 0x0e3a: \"Thai_phinthu\",\n 0x0e3f: \"Thai_baht\",\n 0x0e40: \"Thai_sarae\",\n 0x0e41: \"Thai_saraae\",\n 0x0e42: \"Thai_sarao\",\n 0x0e43: \"Thai_saraaimaimuan\",\n 0x0e44: \"Thai_saraaimaimalai\",\n 0x0e45: \"Thai_lakkhangyao\",\n 0x0e46: \"Thai_maiyamok\",\n 0x0e47: \"Thai_maitaikhu\",\n 0x0e48: \"Thai_maiek\",\n 0x0e49: \"Thai_maitho\",\n 0x0e4a: \"Thai_maitri\",\n 0x0e4b: \"Thai_maichattawa\",\n 0x0e4c: \"Thai_thanthakhat\",\n 0x0e4d: \"Thai_nikhahit\",\n 0x0e50: \"Thai_leksun\",\n 0x0e51: \"Thai_leknung\",\n 0x0e52: \"Thai_leksong\",\n 0x0e53: \"Thai_leksam\",\n 0x0e54: \"Thai_leksi\",\n 0x0e55: \"Thai_lekha\",\n 0x0e56: \"Thai_lekhok\",\n 0x0e57: \"Thai_lekchet\",\n 0x0e58: \"Thai_lekpaet\",\n 0x0e59: \"Thai_lekkao\",\n 0x3131: \"Hangul_Kiyeog\",\n 0x3132: \"Hangul_SsangKiyeog\",\n 0x3133: \"Hangul_KiyeogSios\",\n 0x3134: \"Hangul_Nieun\",\n 0x3135: \"Hangul_NieunJieuj\",\n 0x3136: \"Hangul_NieunHieuh\",\n 0x3137: \"Hangul_Dikeud\",\n 0x3138: \"Hangul_SsangDikeud\",\n 0x3139: \"Hangul_Rieul\",\n 0x313a: \"Hangul_RieulKiyeog\",\n 0x313b: \"Hangul_RieulMieum\",\n 0x313c: \"Hangul_RieulPieub\",\n 0x313d: \"Hangul_RieulSios\",\n 0x313e: \"Hangul_RieulTieut\",\n 0x313f: \"Hangul_RieulPhieuf\",\n 0x3140: \"Hangul_RieulHieuh\",\n 0x3141: \"Hangul_Mieum\",\n 0x3142: \"Hangul_Pieub\",\n 0x3143: \"Hangul_SsangPieub\",\n 0x3144: \"Hangul_PieubSios\",\n 0x3145: \"Hangul_Sios\",\n 0x3146: \"Hangul_SsangSios\",\n 0x3147: \"Hangul_Ieung\",\n 0x3148: \"Hangul_Jieuj\",\n 0x3149: \"Hangul_SsangJieuj\",\n 0x314a: \"Hangul_Cieuc\",\n 0x314b: \"Hangul_Khieuq\",\n 0x314c: \"Hangul_Tieut\",\n 0x314d: \"Hangul_Phieuf\",\n 0x314e: \"Hangul_Hieuh\",\n 0x314f: \"Hangul_A\",\n 0x3150: \"Hangul_AE\",\n 0x3151: \"Hangul_YA\",\n 0x3152: \"Hangul_YAE\",\n 0x3153: \"Hangul_EO\",\n 0x3154: \"Hangul_E\",\n 0x3155: \"Hangul_YEO\",\n 0x3156: \"Hangul_YE\",\n 0x3157: \"Hangul_O\",\n 0x3158: \"Hangul_WA\",\n 0x3159: \"Hangul_WAE\",\n 0x315a: \"Hangul_OE\",\n 0x315b: \"Hangul_YO\",\n 0x315c: \"Hangul_U\",\n 0x315d: \"Hangul_WEO\",\n 0x315e: \"Hangul_WE\",\n 0x315f: \"Hangul_WI\",\n 0x3160: \"Hangul_YU\",\n 0x3161: \"Hangul_EU\",\n 0x3162: \"Hangul_YI\",\n 0x3163: \"Hangul_I\",\n 0x11a8: \"Hangul_J_Kiyeog\",\n 0x11a9: \"Hangul_J_SsangKiyeog\",\n 0x11aa: \"Hangul_J_KiyeogSios\",\n 0x11ab: \"Hangul_J_Nieun\",\n 0x11ac: \"Hangul_J_NieunJieuj\",\n 0x11ad: \"Hangul_J_NieunHieuh\",\n 0x11ae: \"Hangul_J_Dikeud\",\n 0x11af: \"Hangul_J_Rieul\",\n 0x11b0: \"Hangul_J_RieulKiyeog\",\n 0x11b1: \"Hangul_J_RieulMieum\",\n 0x11b2: \"Hangul_J_RieulPieub\",\n 0x11b3: \"Hangul_J_RieulSios\",\n 0x11b4: \"Hangul_J_RieulTieut\",\n 0x11b5: \"Hangul_J_RieulPhieuf\",\n 0x11b6: \"Hangul_J_RieulHieuh\",\n 0x11b7: \"Hangul_J_Mieum\",\n 0x11b8: \"Hangul_J_Pieub\",\n 0x11b9: \"Hangul_J_PieubSios\",\n 0x11ba: \"Hangul_J_Sios\",\n 0x11bb: \"Hangul_J_SsangSios\",\n 0x11bc: \"Hangul_J_Ieung\",\n 0x11bd: \"Hangul_J_Jieuj\",\n 0x11be: \"Hangul_J_Cieuc\",\n 0x11bf: \"Hangul_J_Khieuq\",\n 0x11c0: \"Hangul_J_Tieut\",\n 0x11c1: \"Hangul_J_Phieuf\",\n 0x11c2: \"Hangul_J_Hieuh\",\n 0x316d: \"Hangul_RieulYeorinHieuh\",\n 0x3171: \"Hangul_SunkyeongeumMieum\",\n 0x3178: \"Hangul_SunkyeongeumPieub\",\n 0x317f: \"Hangul_PanSios\",\n 0x3181: \"Hangul_KkogjiDalrinIeung\",\n 0x3184: \"Hangul_SunkyeongeumPhieuf\",\n 0x3186: \"Hangul_YeorinHieuh\",\n 0x318d: \"Hangul_AraeA\",\n 0x318e: \"Hangul_AraeAE\",\n 0x11eb: \"Hangul_J_PanSios\",\n 0x11f0: \"Hangul_J_KkogjiDalrinIeung\",\n 0x11f9: \"Hangul_J_YeorinHieuh\",\n 0x0152: \"OE\",\n 0x0153: \"oe\",\n 0x0178: \"Ydiaeresis\",\n 0x20a0: \"EcuSign\",\n 0x20a1: \"ColonSign\",\n 0x20a2: \"CruzeiroSign\",\n 0x20a3: \"FFrancSign\",\n 0x20a4: \"LiraSign\",\n 0x20a5: \"MillSign\",\n 0x20a6: \"NairaSign\",\n 0x20a7: \"PesetaSign\",\n 0x20a8: \"RupeeSign\",\n 0x20a9: \"WonSign\",\n 0x20aa: \"NewSheqelSign\",\n 0x20ab: \"DongSign\",\n 0x20ac: \"EuroSign\",\n 0x0300: \"dead_grave\",\n 0x0301: \"dead_acute\",\n 0x0302: \"dead_circumflex\",\n 0x0303: \"dead_tilde\",\n 0x0304: \"dead_macron\",\n 0x0306: \"dead_breve\",\n 0x0307: \"dead_abovedot\",\n 0x0308: \"dead_diaeresis\",\n 0x030a: \"dead_abovering\",\n 0x030b: \"dead_doubleacute\",\n 0x030c: \"dead_caron\",\n 0x0327: \"dead_cedilla\",\n 0x0328: \"dead_ogonek\",\n 0x0345: \"dead_iota\",\n 0x3099: \"dead_voiced_sound\",\n 0x309a: \"dead_semivoiced_sound\",\n 0x0008: \"BackSpace\",\n 0x0009: \"Tab\",\n 0x000a: \"Linefeed\",\n 0x000b: \"Clear\",\n 0x000d: \"Return\",\n 0x0013: \"Pause\",\n 0x0014: \"Scroll_Lock\",\n 0x0015: \"Sys_Req\",\n 0x001b: \"Escape\",\n 0x0491: \"Ukrainian_ghe_with_upturn\",\n 0x0490: \"Ukrainian_GHE_WITH_UPTURN\",\n 0x0587: \"Armenian_ligature_ew\",\n 0x0589: \"Armenian_verjaket\",\n 0x055d: \"Armenian_but\",\n 0x058a: \"Armenian_yentamna\",\n 0x055c: \"Armenian_amanak\",\n 0x055b: \"Armenian_shesht\",\n 0x055e: \"Armenian_paruyk\",\n 0x0531: \"Armenian_AYB\",\n 0x0561: \"Armenian_ayb\",\n 0x0532: \"Armenian_BEN\",\n 0x0562: \"Armenian_ben\",\n 0x0533: \"Armenian_GIM\",\n 0x0563: \"Armenian_gim\",\n 0x0534: \"Armenian_DA\",\n 0x0564: \"Armenian_da\",\n 0x0535: \"Armenian_YECH\",\n 0x0565: \"Armenian_yech\",\n 0x0536: \"Armenian_ZA\",\n 0x0566: \"Armenian_za\",\n 0x0537: \"Armenian_E\",\n 0x0567: \"Armenian_e\",\n 0x0538: \"Armenian_AT\",\n 0x0568: \"Armenian_at\",\n 0x0539: \"Armenian_TO\",\n 0x0569: \"Armenian_to\",\n 0x053a: \"Armenian_ZHE\",\n 0x056a: \"Armenian_zhe\",\n 0x053b: \"Armenian_INI\",\n 0x056b: \"Armenian_ini\",\n 0x053c: \"Armenian_LYUN\",\n 0x056c: \"Armenian_lyun\",\n 0x053d: \"Armenian_KHE\",\n 0x056d: \"Armenian_khe\",\n 0x053e: \"Armenian_TSA\",\n 0x056e: \"Armenian_tsa\",\n 0x053f: \"Armenian_KEN\",\n 0x056f: \"Armenian_ken\",\n 0x0540: \"Armenian_HO\",\n 0x0570: \"Armenian_ho\",\n 0x0541: \"Armenian_DZA\",\n 0x0571: \"Armenian_dza\",\n 0x0542: \"Armenian_GHAT\",\n 0x0572: \"Armenian_ghat\",\n 0x0543: \"Armenian_TCHE\",\n 0x0573: \"Armenian_tche\",\n 0x0544: \"Armenian_MEN\",\n 0x0574: \"Armenian_men\",\n 0x0545: \"Armenian_HI\",\n 0x0575: \"Armenian_hi\",\n 0x0546: \"Armenian_NU\",\n 0x0576: \"Armenian_nu\",\n 0x0547: \"Armenian_SHA\",\n 0x0577: \"Armenian_sha\",\n 0x0548: \"Armenian_VO\",\n 0x0578: \"Armenian_vo\",\n 0x0549: \"Armenian_CHA\",\n 0x0579: \"Armenian_cha\",\n 0x054a: \"Armenian_PE\",\n 0x057a: \"Armenian_pe\",\n 0x054b: \"Armenian_JE\",\n 0x057b: \"Armenian_je\",\n 0x054c: \"Armenian_RA\",\n 0x057c: \"Armenian_ra\",\n 0x054d: \"Armenian_SE\",\n 0x057d: \"Armenian_se\",\n 0x054e: \"Armenian_VEV\",\n 0x057e: \"Armenian_vev\",\n 0x054f: \"Armenian_TYUN\",\n 0x057f: \"Armenian_tyun\",\n 0x0550: \"Armenian_RE\",\n 0x0580: \"Armenian_re\",\n 0x0551: \"Armenian_TSO\",\n 0x0581: \"Armenian_tso\",\n 0x0552: \"Armenian_VYUN\",\n 0x0582: \"Armenian_vyun\",\n 0x0553: \"Armenian_PYUR\",\n 0x0583: \"Armenian_pyur\",\n 0x0554: \"Armenian_KE\",\n 0x0584: \"Armenian_ke\",\n 0x0555: \"Armenian_O\",\n 0x0585: \"Armenian_o\",\n 0x0556: \"Armenian_FE\",\n 0x0586: \"Armenian_fe\",\n 0x055a: \"Armenian_apostrophe\",\n 0x10d0: \"Georgian_an\",\n 0x10d1: \"Georgian_ban\",\n 0x10d2: \"Georgian_gan\",\n 0x10d3: \"Georgian_don\",\n 0x10d4: \"Georgian_en\",\n 0x10d5: \"Georgian_vin\",\n 0x10d6: \"Georgian_zen\",\n 0x10d7: \"Georgian_tan\",\n 0x10d8: \"Georgian_in\",\n 0x10d9: \"Georgian_kan\",\n 0x10da: \"Georgian_las\",\n 0x10db: \"Georgian_man\",\n 0x10dc: \"Georgian_nar\",\n 0x10dd: \"Georgian_on\",\n 0x10de: \"Georgian_par\",\n 0x10df: \"Georgian_zhar\",\n 0x10e0: \"Georgian_rae\",\n 0x10e1: \"Georgian_san\",\n 0x10e2: \"Georgian_tar\",\n 0x10e3: \"Georgian_un\",\n 0x10e4: \"Georgian_phar\",\n 0x10e5: \"Georgian_khar\",\n 0x10e6: \"Georgian_ghan\",\n 0x10e7: \"Georgian_qar\",\n 0x10e8: \"Georgian_shin\",\n 0x10e9: \"Georgian_chin\",\n 0x10ea: \"Georgian_can\",\n 0x10eb: \"Georgian_jil\",\n 0x10ec: \"Georgian_cil\",\n 0x10ed: \"Georgian_char\",\n 0x10ee: \"Georgian_xan\",\n 0x10ef: \"Georgian_jhan\",\n 0x10f0: \"Georgian_hae\",\n 0x10f1: \"Georgian_he\",\n 0x10f2: \"Georgian_hie\",\n 0x10f3: \"Georgian_we\",\n 0x10f4: \"Georgian_har\",\n 0x10f5: \"Georgian_hoe\",\n 0x10f6: \"Georgian_fi\",\n 0x1e02: \"Babovedot\",\n 0x1e03: \"babovedot\",\n 0x1e0a: \"Dabovedot\",\n 0x1e80: \"Wgrave\",\n 0x1e82: \"Wacute\",\n 0x1e0b: \"dabovedot\",\n 0x1ef2: \"Ygrave\",\n 0x1e1e: \"Fabovedot\",\n 0x1e1f: \"fabovedot\",\n 0x1e40: \"Mabovedot\",\n 0x1e41: \"mabovedot\",\n 0x1e56: \"Pabovedot\",\n 0x1e81: \"wgrave\",\n 0x1e57: \"pabovedot\",\n 0x1e83: \"wacute\",\n 0x1e60: \"Sabovedot\",\n 0x1ef3: \"ygrave\",\n 0x1e84: \"Wdiaeresis\",\n 0x1e85: \"wdiaeresis\",\n 0x1e61: \"sabovedot\",\n 0x0174: \"Wcircumflex\",\n 0x1e6a: \"Tabovedot\",\n 0x0176: \"Ycircumflex\",\n 0x0175: \"wcircumflex\",\n 0x1e6b: \"tabovedot\",\n 0x0177: \"ycircumflex\",\n 0x06f0: \"Farsi_0\",\n 0x06f1: \"Farsi_1\",\n 0x06f2: \"Farsi_2\",\n 0x06f3: \"Farsi_3\",\n 0x06f4: \"Farsi_4\",\n 0x06f5: \"Farsi_5\",\n 0x06f6: \"Farsi_6\",\n 0x06f7: \"Farsi_7\",\n 0x06f8: \"Farsi_8\",\n 0x06f9: \"Farsi_9\",\n 0x066a: \"Arabic_percent\",\n 0x0670: \"Arabic_superscript_alef\",\n 0x0679: \"Arabic_tteh\",\n 0x067e: \"Arabic_peh\",\n 0x0686: \"Arabic_tcheh\",\n 0x0688: \"Arabic_ddal\",\n 0x0691: \"Arabic_rreh\",\n 0x06d4: \"Arabic_fullstop\",\n 0x0660: \"Arabic_0\",\n 0x0661: \"Arabic_1\",\n 0x0662: \"Arabic_2\",\n 0x0663: \"Arabic_3\",\n 0x0664: \"Arabic_4\",\n 0x0665: \"Arabic_5\",\n 0x0666: \"Arabic_6\",\n 0x0667: \"Arabic_7\",\n 0x0668: \"Arabic_8\",\n 0x0669: \"Arabic_9\",\n 0x0653: \"Arabic_madda_above\",\n 0x0654: \"Arabic_hamza_above\",\n 0x0655: \"Arabic_hamza_below\",\n 0x0698: \"Arabic_jeh\",\n 0x06a4: \"Arabic_veh\",\n 0x06a9: \"Arabic_keheh\",\n 0x06af: \"Arabic_gaf\",\n 0x06ba: \"Arabic_noon_ghunna\",\n 0x06be: \"Arabic_heh_doachashmee\",\n 0x06cc: \"Farsi_yeh\",\n 0x06d2: \"Arabic_yeh_baree\",\n 0x06c1: \"Arabic_heh_goal\",\n 0x0492: \"Cyrillic_GHE_bar\",\n 0x0496: \"Cyrillic_ZHE_descender\",\n 0x049a: \"Cyrillic_KA_descender\",\n 0x049c: \"Cyrillic_KA_vertstroke\",\n 0x04a2: \"Cyrillic_EN_descender\",\n 0x04ae: \"Cyrillic_U_straight\",\n 0x04b0: \"Cyrillic_U_straight_bar\",\n 0x04b2: \"Cyrillic_HA_descender\",\n 0x04b6: \"Cyrillic_CHE_descender\",\n 0x04b8: \"Cyrillic_CHE_vertstroke\",\n 0x04ba: \"Cyrillic_SHHA\",\n 0x04d8: \"Cyrillic_SCHWA\",\n 0x04e2: \"Cyrillic_I_macron\",\n 0x04e8: \"Cyrillic_O_bar\",\n 0x04ee: \"Cyrillic_U_macron\",\n 0x0493: \"Cyrillic_ghe_bar\",\n 0x0497: \"Cyrillic_zhe_descender\",\n 0x049b: \"Cyrillic_ka_descender\",\n 0x049d: \"Cyrillic_ka_vertstroke\",\n 0x04a3: \"Cyrillic_en_descender\",\n 0x04af: \"Cyrillic_u_straight\",\n 0x04b1: \"Cyrillic_u_straight_bar\",\n 0x04b3: \"Cyrillic_ha_descender\",\n 0x04b7: \"Cyrillic_che_descender\",\n 0x04b9: \"Cyrillic_che_vertstroke\",\n 0x04bb: \"Cyrillic_shha\",\n 0x04d9: \"Cyrillic_schwa\",\n 0x04e3: \"Cyrillic_i_macron\",\n 0x04e9: \"Cyrillic_o_bar\",\n 0x04ef: \"Cyrillic_u_macron\",\n 0x1e8a: \"Xabovedot\",\n 0x012c: \"Ibreve\",\n 0x01b5: \"Zstroke\",\n 0x01e6: \"Gcaron\",\n 0x019f: \"Obarred\",\n 0x1e8b: \"xabovedot\",\n 0x012d: \"ibreve\",\n 0x01b6: \"zstroke\",\n 0x01e7: \"gcaron\",\n 0x01d2: \"ocaron\",\n 0x0275: \"obarred\",\n 0x018f: \"SCHWA\",\n 0x0259: \"schwa\",\n 0x1e36: \"Lbelowdot\",\n 0x1e37: \"lbelowdot\",\n 0x1ea0: \"Abelowdot\",\n 0x1ea1: \"abelowdot\",\n 0x1ea2: \"Ahook\",\n 0x1ea3: \"ahook\",\n 0x1ea4: \"Acircumflexacute\",\n 0x1ea5: \"acircumflexacute\",\n 0x1ea6: \"Acircumflexgrave\",\n 0x1ea7: \"acircumflexgrave\",\n 0x1ea8: \"Acircumflexhook\",\n 0x1ea9: \"acircumflexhook\",\n 0x1eaa: \"Acircumflextilde\",\n 0x1eab: \"acircumflextilde\",\n 0x1eac: \"Acircumflexbelowdot\",\n 0x1ead: \"acircumflexbelowdot\",\n 0x1eae: \"Abreveacute\",\n 0x1eaf: \"abreveacute\",\n 0x1eb0: \"Abrevegrave\",\n 0x1eb1: \"abrevegrave\",\n 0x1eb2: \"Abrevehook\",\n 0x1eb3: \"abrevehook\",\n 0x1eb4: \"Abrevetilde\",\n 0x1eb5: \"abrevetilde\",\n 0x1eb6: \"Abrevebelowdot\",\n 0x1eb7: \"abrevebelowdot\",\n 0x1eb8: \"Ebelowdot\",\n 0x1eb9: \"ebelowdot\",\n 0x1eba: \"Ehook\",\n 0x1ebb: \"ehook\",\n 0x1ebc: \"Etilde\",\n 0x1ebd: \"etilde\",\n 0x1ebe: \"Ecircumflexacute\",\n 0x1ebf: \"ecircumflexacute\",\n 0x1ec0: \"Ecircumflexgrave\",\n 0x1ec1: \"ecircumflexgrave\",\n 0x1ec2: \"Ecircumflexhook\",\n 0x1ec3: \"ecircumflexhook\",\n 0x1ec4: \"Ecircumflextilde\",\n 0x1ec5: \"ecircumflextilde\",\n 0x1ec6: \"Ecircumflexbelowdot\",\n 0x1ec7: \"ecircumflexbelowdot\",\n 0x1ec8: \"Ihook\",\n 0x1ec9: \"ihook\",\n 0x1eca: \"Ibelowdot\",\n 0x1ecb: \"ibelowdot\",\n 0x1ecc: \"Obelowdot\",\n 0x1ecd: \"obelowdot\",\n 0x1ece: \"Ohook\",\n 0x1ecf: \"ohook\",\n 0x1ed0: \"Ocircumflexacute\",\n 0x1ed1: \"ocircumflexacute\",\n 0x1ed2: \"Ocircumflexgrave\",\n 0x1ed3: \"ocircumflexgrave\",\n 0x1ed4: \"Ocircumflexhook\",\n 0x1ed5: \"ocircumflexhook\",\n 0x1ed6: \"Ocircumflextilde\",\n 0x1ed7: \"ocircumflextilde\",\n 0x1ed8: \"Ocircumflexbelowdot\",\n 0x1ed9: \"ocircumflexbelowdot\",\n 0x1eda: \"Ohornacute\",\n 0x1edb: \"ohornacute\",\n 0x1edc: \"Ohorngrave\",\n 0x1edd: \"ohorngrave\",\n 0x1ede: \"Ohornhook\",\n 0x1edf: \"ohornhook\",\n 0x1ee0: \"Ohorntilde\",\n 0x1ee1: \"ohorntilde\",\n 0x1ee2: \"Ohornbelowdot\",\n 0x1ee3: \"ohornbelowdot\",\n 0x1ee4: \"Ubelowdot\",\n 0x1ee5: \"ubelowdot\",\n 0x1ee6: \"Uhook\",\n 0x1ee7: \"uhook\",\n 0x1ee8: \"Uhornacute\",\n 0x1ee9: \"uhornacute\",\n 0x1eea: \"Uhorngrave\",\n 0x1eeb: \"uhorngrave\",\n 0x1eec: \"Uhornhook\",\n 0x1eed: \"uhornhook\",\n 0x1eee: \"Uhorntilde\",\n 0x1eef: \"uhorntilde\",\n 0x1ef0: \"Uhornbelowdot\",\n 0x1ef1: \"uhornbelowdot\",\n 0x1ef4: \"Ybelowdot\",\n 0x1ef5: \"ybelowdot\",\n 0x1ef6: \"Yhook\",\n 0x1ef7: \"yhook\",\n 0x1ef8: \"Ytilde\",\n 0x1ef9: \"ytilde\",\n 0x01a0: \"Ohorn\",\n 0x01a1: \"ohorn\",\n 0x01af: \"Uhorn\",\n 0x01b0: \"uhorn\",\n 0x0323: \"dead_belowdot\",\n 0x0309: \"dead_hook\",\n 0x031b: \"dead_horn\"\n});\n\n// mapping is based on https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_key_values\nconst kbEventCodesToKeySyms = Object.freeze({\n \"AltLeft\": \"Alt_L\",\n \"AltRight\": \"Alt_R\",\n \"ArrowDown\": \"Down\",\n \"ArrowLeft\": \"Left\",\n \"ArrowRight\": \"Right\",\n \"ArrowUp\": \"Up\",\n \"Backspace\": \"BackSpace\",\n \"CapsLock\": \"Caps_Lock\",\n \"ControlLeft\": \"Control_L\",\n \"ControlRight\": \"Control_R\",\n \"Enter\": \"Return\",\n \"HyperLeft\": \"Hyper_L\",\n \"HyperRight\": \"Hyper_R\",\n \"NumLock\": \"Num_Lock\",\n \"NumpadEnter\": \"Return\",\n \"MetaLeft\": \"Meta_L\",\n \"MetaRight\": \"Meta_R\",\n \"PageDown\": \"Page_Down\",\n \"PageUp\": \"Page_Up\",\n \"ScrollLock\": \"Scroll_Lock\",\n \"ShiftLeft\": \"Shift_L\",\n \"ShiftRight\": \"Shift_R\",\n \"SuperLeft\": \"Super_L\",\n \"SuperRight\": \"Super_R\"\n});\n\n// these Keyboard Event codes direclty map to X11 Keysyms\nconst knownKbEventCodes = new Set([\n \"Clear\", \"Copy\", \"Cut\", \"Delete\", \"End\", \"F1\", \"F2\", \"F3\", \"F4\", \"F5\", \"F6\", \"F7\", \"F8\", \"F9\", \"F10\", \"F11\", \"F12\",\n \"Home\", \"Insert\", \"Paste\", \"Redo\", \"Tab\", \"Undo\"\n]);\n\n/**\n * Returns X11 keySym (defined in https://www.cl.cam.ac.uk/~mgk25/ucs/keysyms.txt) for a given key/code from the key[up/down] event\n * For keys with length 1 (ASCII, Cyrillic etc) - uses uniToKeySyms mapping\n * For keys with length > 1 (Modifiers, Whitespaces, Navigation etc) - uses knownKbEventCodes and kbEventCodesToKeySyms mapping\n *\n * @param {string} key 'key' from the key[up/down] event\n * @param {string} code 'code' from the key[up/down] event\n * @return {string} keySymString (X11 keysym string)\n */\nexport default function getKeysymString(key, code) {\n var keySym = \"Unidentified\";\n if (key.length === 1) {\n const keyCodeUni = key.charCodeAt(0);\n if (keyCodeUni in uniToKeySyms) {\n keySym = uniToKeySyms[keyCodeUni];\n }\n } else if (code in kbEventCodesToKeySyms) {\n keySym = kbEventCodesToKeySyms[code];\n } else if (knownKbEventCodes.has(code)) {\n keySym = code;\n }\n return keySym;\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport getKeysymString from \"./keysyms.js\";\n\nconst eventsNames = Object.freeze([\n \"wheel\",\n \"contextmenu\",\n \"mousemove\",\n \"mousedown\",\n \"mouseup\",\n \"touchstart\",\n \"touchend\",\n \"touchmove\",\n \"touchcancel\",\n \"keyup\",\n \"keydown\"\n]);\n\nconst mouseEventsNames = Object.freeze({\n mousemove: \"MouseMove\",\n mousedown: \"MouseButtonPress\",\n mouseup: \"MouseButtonRelease\"\n});\n\nconst touchEventsNames = Object.freeze({\n touchstart: \"TouchDown\",\n touchend: \"TouchUp\",\n touchmove: \"TouchMotion\",\n touchcancel: \"TouchUp\"\n});\n\nconst keyboardEventsNames = Object.freeze({\n keydown: \"KeyPress\",\n keyup: \"KeyRelease\"\n});\n\nfunction getModifiers(event) {\n const modifiers = [];\n if (event.altKey) {\n modifiers.push(\"mod1-mask\");\n }\n\n if (event.ctrlKey) {\n modifiers.push(\"control-mask\");\n }\n\n if (event.metaKey) {\n modifiers.push(\"meta-mask\");\n }\n\n if (event.shiftKey) {\n modifiers.push(\"shift-mask\");\n }\n\n return modifiers.join(\"+\");\n}\n\n/**\n * @class GstWebRTCAPI.RemoteController\n * @hideconstructor\n * @classdesc Manages a specific WebRTC data channel created by a remote GStreamer webrtcsink producer and offering\n * remote control of the producer through\n * [GstNavigation]{@link https://gstreamer.freedesktop.org/documentation/video/gstnavigation.html} events.\n * <p>The remote control data channel is created by the GStreamer webrtcsink element on the producer side. Then it is\n * announced through the consumer session thanks to the {@link gstWebRTCAPI#event:RemoteControllerChangedEvent}\n * event.</p>\n * <p>You can attach an {@link external:HTMLVideoElement} to the remote controller, then all mouse and keyboard events\n * emitted by this element will be automatically relayed to the remote producer.</p>\n * @extends {external:EventTarget}\n * @fires {@link GstWebRTCAPI#event:ErrorEvent}\n * @fires {@link GstWebRTCAPI#event:ClosedEvent}\n * @see GstWebRTCAPI.ConsumerSession#remoteController\n * @see GstWebRTCAPI.RemoteController#attachVideoElement\n * @see https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/tree/main/net/webrtc/gstwebrtc-api#produce-a-gstreamer-interactive-webrtc-stream-with-remote-control\n */\nexport default class RemoteController extends EventTarget {\n constructor(rtcDataChannel, consumerSession) {\n super();\n\n this._rtcDataChannel = rtcDataChannel;\n this._consumerSession = consumerSession;\n\n this._videoElement = null;\n this._videoElementComputedStyle = null;\n this._videoElementKeyboard = null;\n this._lastTouchEventTimestamp = 0;\n\n rtcDataChannel.addEventListener(\"close\", () => {\n if (this._rtcDataChannel === rtcDataChannel) {\n this.close();\n }\n });\n\n rtcDataChannel.addEventListener(\"error\", (event) => {\n if (this._rtcDataChannel === rtcDataChannel) {\n const error = event.error;\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: (error && error.message) || \"Remote controller error\",\n error: error || new Error(\"unknown error on the remote controller data channel\")\n }));\n }\n });\n }\n\n /**\n * The underlying WebRTC data channel connected to a remote GStreamer webrtcsink producer offering remote control.\n * The value may be null if the remote controller has been closed.\n * @member {external:RTCDataChannel} GstWebRTCAPI.RemoteController#rtcDataChannel\n * @readonly\n */\n get rtcDataChannel() {\n return this._rtcDataChannel;\n }\n\n /**\n * The consumer session associated with this remote controller.\n * @member {GstWebRTCAPI.ConsumerSession} GstWebRTCAPI.RemoteController#consumerSession\n * @readonly\n */\n get consumerSession() {\n return this._consumerSession;\n }\n\n /**\n * The video element that is currently used to send all mouse and keyboard events to the remote producer. Value may\n * be null if no video element is attached.\n * @member {external:HTMLVideoElement} GstWebRTCAPI.RemoteController#videoElement\n * @readonly\n * @see GstWebRTCAPI.RemoteController#attachVideoElement\n */\n get videoElement() {\n return this._videoElement;\n }\n\n /**\n * Associates a video element with this remote controller.<br>\n * When a video element is attached to this remote controller, all mouse and keyboard events emitted by this\n * element will be sent to the remote GStreamer webrtcink producer.\n * @method GstWebRTCAPI.RemoteController#attachVideoElement\n * @param {external:HTMLVideoElement|null} element - the video element to use to relay mouse and keyboard events,\n * or null to detach any previously attached element. If the provided element parameter is not null and not a\n * valid instance of an {@link external:HTMLVideoElement}, then the method does nothing.\n */\n attachVideoElement(element) {\n if ((element instanceof HTMLVideoElement) && (element !== this._videoElement)) {\n if (this._videoElement) {\n this.attachVideoElement(null);\n }\n\n this._videoElement = element;\n this._videoElementComputedStyle = window.getComputedStyle(element);\n\n for (const eventName of eventsNames) {\n element.addEventListener(eventName, this);\n }\n\n element.setAttribute(\"tabindex\", \"0\");\n } else if ((element === null) && this._videoElement) {\n const previousElement = this._videoElement;\n previousElement.removeAttribute(\"tabindex\");\n\n this._videoElement = null;\n this._videoElementComputedStyle = null;\n\n this._lastTouchEventTimestamp = 0;\n\n for (const eventName of eventsNames) {\n previousElement.removeEventListener(eventName, this);\n }\n }\n }\n\n /**\n * Closes the remote controller channel.<br>\n * It immediately shuts down the underlying WebRTC data channel connected to a remote GStreamer webrtcsink\n * producer and detaches any video element that may be used to relay mouse and keyboard events.\n * @method GstWebRTCAPI.RemoteController#close\n */\n close() {\n this.attachVideoElement(null);\n\n const rtcDataChannel = this._rtcDataChannel;\n this._rtcDataChannel = null;\n\n if (rtcDataChannel) {\n rtcDataChannel.close();\n this.dispatchEvent(new Event(\"closed\"));\n }\n }\n\n _sendGstNavigationEvent(data) {\n try {\n if (!data || (typeof (data) !== \"object\")) {\n throw new Error(\"invalid GstNavigation event\");\n }\n\n if (!this._rtcDataChannel) {\n throw new Error(\"remote controller data channel is closed\");\n }\n\n this._rtcDataChannel.send(JSON.stringify(data));\n } catch (ex) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: `cannot send GstNavigation event over session ${this._consumerSession.sessionId} remote controller`,\n error: ex\n }));\n }\n }\n\n _computeVideoMousePosition(event) {\n const mousePos = { x: 0, y: 0 };\n if (!this._videoElement || (this._videoElement.videoWidth <= 0) || (this._videoElement.videoHeight <= 0)) {\n return mousePos;\n }\n\n const padding = {\n left: parseFloat(this._videoElementComputedStyle.paddingLeft),\n right: parseFloat(this._videoElementComputedStyle.paddingRight),\n top: parseFloat(this._videoElementComputedStyle.paddingTop),\n bottom: parseFloat(this._videoElementComputedStyle.paddingBottom)\n };\n\n if ((\"offsetX\" in event) && (\"offsetY\" in event)) {\n mousePos.x = event.offsetX - padding.left;\n mousePos.y = event.offsetY - padding.top;\n } else {\n const clientRect = this._videoElement.getBoundingClientRect();\n const border = {\n left: parseFloat(this._videoElementComputedStyle.borderLeftWidth),\n top: parseFloat(this._videoElementComputedStyle.borderTopWidth)\n };\n mousePos.x = event.clientX - clientRect.left - border.left - padding.left;\n mousePos.y = event.clientY - clientRect.top - border.top - padding.top;\n }\n\n const videoOffset = {\n x: this._videoElement.clientWidth - (padding.left + padding.right),\n y: this._videoElement.clientHeight - (padding.top + padding.bottom)\n };\n\n const ratio = Math.min(videoOffset.x / this._videoElement.videoWidth, videoOffset.y / this._videoElement.videoHeight);\n videoOffset.x = Math.max(0.5 * (videoOffset.x - this._videoElement.videoWidth * ratio), 0);\n videoOffset.y = Math.max(0.5 * (videoOffset.y - this._videoElement.videoHeight * ratio), 0);\n\n const invRatio = (ratio !== 0) ? (1 / ratio) : 0;\n mousePos.x = (mousePos.x - videoOffset.x) * invRatio;\n mousePos.y = (mousePos.y - videoOffset.y) * invRatio;\n\n mousePos.x = Math.min(Math.max(mousePos.x, 0), this._videoElement.videoWidth);\n mousePos.y = Math.min(Math.max(mousePos.y, 0), this._videoElement.videoHeight);\n\n return mousePos;\n }\n\n handleEvent(event) {\n if (!this._videoElement) {\n return;\n }\n\n switch (event.type) {\n case \"wheel\":\n event.preventDefault();\n {\n const mousePos = this._computeVideoMousePosition(event);\n this._sendGstNavigationEvent({\n event: \"MouseScroll\",\n x: mousePos.x,\n y: mousePos.y,\n delta_x: -event.deltaX, // eslint-disable-line camelcase\n delta_y: -event.deltaY, // eslint-disable-line camelcase\n modifier_state: getModifiers(event) // eslint-disable-line camelcase\n });\n }\n break;\n\n case \"contextmenu\":\n event.preventDefault();\n break;\n\n case \"mousemove\":\n case \"mousedown\":\n case \"mouseup\":\n event.preventDefault();\n {\n const mousePos = this._computeVideoMousePosition(event);\n const data = {\n event: mouseEventsNames[event.type],\n x: mousePos.x,\n y: mousePos.y,\n modifier_state: getModifiers(event) // eslint-disable-line camelcase\n };\n\n if (event.type !== \"mousemove\") {\n data.button = event.button + 1;\n\n if ((event.type === \"mousedown\") && (event.button === 0)) {\n this._videoElement.focus();\n }\n }\n\n this._sendGstNavigationEvent(data);\n }\n break;\n\n case \"touchstart\":\n case \"touchend\":\n case \"touchmove\":\n case \"touchcancel\":\n for (const touch of event.changedTouches) {\n const mousePos = this._computeVideoMousePosition(touch);\n const data = {\n event: touchEventsNames[event.type],\n identifier: touch.identifier,\n x: mousePos.x,\n y: mousePos.y,\n modifier_state: getModifiers(event) // eslint-disable-line camelcase\n };\n\n if ((\"force\" in touch) && ((event.type === \"touchstart\") || (event.type === \"touchmove\"))) {\n data.pressure = touch.force;\n }\n\n this._sendGstNavigationEvent(data);\n }\n\n if (event.timeStamp > this._lastTouchEventTimestamp) {\n this._lastTouchEventTimestamp = event.timeStamp;\n this._sendGstNavigationEvent({\n event: \"TouchFrame\",\n modifier_state: getModifiers(event) // eslint-disable-line camelcase\n });\n }\n break;\n case \"keyup\":\n case \"keydown\":\n event.preventDefault();\n {\n const data = {\n event: keyboardEventsNames[event.type],\n key: getKeysymString(event.key, event.code),\n modifier_state: getModifiers(event) // eslint-disable-line camelcase\n };\n this._sendGstNavigationEvent(data);\n }\n break;\n }\n }\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport WebRTCSession from \"./webrtc-session.js\";\nimport SessionState from \"./session-state.js\";\nimport RemoteController from \"./remote-controller.js\";\n\n/**\n * Event name: \"streamsChanged\".<br>\n * Triggered when the underlying media streams of a {@link GstWebRTCAPI.ConsumerSession} change.\n * @event GstWebRTCAPI#StreamsChangedEvent\n * @type {external:Event}\n * @see GstWebRTCAPI.ConsumerSession#streams\n */\n/**\n * Event name: \"remoteControllerChanged\".<br>\n * Triggered when the underlying remote controller of a {@link GstWebRTCAPI.ConsumerSession} changes.\n * @event GstWebRTCAPI#RemoteControllerChangedEvent\n * @type {external:Event}\n * @see GstWebRTCAPI.ConsumerSession#remoteController\n */\n\n/**\n * @class GstWebRTCAPI.ConsumerSession\n * @hideconstructor\n * @classdesc Consumer session managing a peer-to-peer WebRTC channel between a remote producer and this client\n * instance.\n * <p>Call {@link GstWebRTCAPI#createConsumerSession} to create a ConsumerSession instance.</p>\n * @extends {GstWebRTCAPI.WebRTCSession}\n * @fires {@link GstWebRTCAPI#event:StreamsChangedEvent}\n * @fires {@link GstWebRTCAPI#event:RemoteControllerChangedEvent}\n */\nexport default class ConsumerSession extends WebRTCSession {\n constructor(peerId, comChannel) {\n super(peerId, comChannel);\n this._streams = [];\n this._remoteController = null;\n\n this.addEventListener(\"closed\", () => {\n this._streams = [];\n\n if (this._remoteController) {\n this._remoteController.close();\n }\n });\n }\n\n /**\n * The array of remote media streams consumed locally through this WebRTC channel.\n * @member {external:MediaStream[]} GstWebRTCAPI.ConsumerSession#streams\n * @readonly\n */\n get streams() {\n return this._streams;\n }\n\n /**\n * The remote controller associated with this WebRTC consumer session. Value may be null if consumer session\n * has no remote controller.\n * @member {GstWebRTCAPI.RemoteController} GstWebRTCAPI.ConsumerSession#remoteController\n * @readonly\n */\n get remoteController() {\n return this._remoteController;\n }\n\n /**\n * Connects the consumer session to its remote producer.<br>\n * This method must be called after creating the consumer session in order to start receiving the remote streams.\n * It registers this consumer session to the signaling server and gets ready to receive audio/video streams.\n * <p>Even on success, streaming can fail later if any error occurs during or after connection. In order to know\n * the effective streaming state, you should be listening to the [error]{@link GstWebRTCAPI#event:ErrorEvent},\n * [stateChanged]{@link GstWebRTCAPI#event:StateChangedEvent} and/or [closed]{@link GstWebRTCAPI#event:ClosedEvent}\n * events.</p>\n * @method GstWebRTCAPI.ConsumerSession#connect\n * @returns {boolean} true in case of success (may fail later during or after connection) or false in case of\n * immediate error (wrong session state or no connection to the signaling server).\n */\n connect() {\n if (!this._comChannel || (this._state === SessionState.closed)) {\n return false;\n }\n\n if (this._state !== SessionState.idle) {\n return true;\n }\n\n const msg = {\n type: \"startSession\",\n peerId: this._peerId\n };\n if (!this._comChannel.send(msg)) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"cannot connect consumer session\",\n error: new Error(\"cannot send startSession message to signaling server\")\n }));\n\n this.close();\n return false;\n }\n\n this._state = SessionState.connecting;\n this.dispatchEvent(new Event(\"stateChanged\"));\n return true;\n }\n\n onSessionStarted(peerId, sessionId) {\n if ((this._peerId === peerId) && (this._state === SessionState.connecting) && !this._sessionId) {\n this._sessionId = sessionId;\n }\n }\n\n onSessionPeerMessage(msg) {\n if ((this._state === SessionState.closed) || !this._comChannel || !this._sessionId) {\n return;\n }\n\n if (!this._rtcPeerConnection) {\n const connection = new RTCPeerConnection(this._comChannel.webrtcConfig);\n this._rtcPeerConnection = connection;\n\n connection.ontrack = (event) => {\n if ((this._rtcPeerConnection === connection) && event.streams && (event.streams.length > 0)) {\n if (this._state === SessionState.connecting) {\n this._state = SessionState.streaming;\n this.dispatchEvent(new Event(\"stateChanged\"));\n }\n\n let streamsChanged = false;\n for (const stream of event.streams) {\n if (!this._streams.includes(stream)) {\n this._streams.push(stream);\n streamsChanged = true;\n }\n }\n\n if (streamsChanged) {\n this.dispatchEvent(new Event(\"streamsChanged\"));\n }\n }\n };\n\n connection.ondatachannel = (event) => {\n const rtcDataChannel = event.channel;\n if (rtcDataChannel && (rtcDataChannel.label === \"input\")) {\n if (this._remoteController) {\n const previousController = this._remoteController;\n this._remoteController = null;\n previousController.close();\n }\n\n const remoteController = new RemoteController(rtcDataChannel, this);\n this._remoteController = remoteController;\n this.dispatchEvent(new Event(\"remoteControllerChanged\"));\n\n remoteController.addEventListener(\"closed\", () => {\n if (this._remoteController === remoteController) {\n this._remoteController = null;\n this.dispatchEvent(new Event(\"remoteControllerChanged\"));\n }\n });\n }\n };\n\n connection.onicecandidate = (event) => {\n if ((this._rtcPeerConnection === connection) && event.candidate && this._comChannel) {\n this._comChannel.send({\n type: \"peer\",\n sessionId: this._sessionId,\n ice: event.candidate.toJSON()\n });\n }\n };\n\n this.dispatchEvent(new Event(\"rtcPeerConnectionChanged\"));\n }\n\n if (msg.sdp) {\n this._rtcPeerConnection.setRemoteDescription(msg.sdp).then(() => {\n if (this._rtcPeerConnection) {\n return this._rtcPeerConnection.createAnswer();\n } else {\n return null;\n }\n }).then((desc) => {\n if (this._rtcPeerConnection && desc) {\n return this._rtcPeerConnection.setLocalDescription(desc);\n } else {\n return null;\n }\n }).then(() => {\n if (this._rtcPeerConnection && this._comChannel) {\n const sdp = {\n type: \"peer\",\n sessionId: this._sessionId,\n sdp: this._rtcPeerConnection.localDescription.toJSON()\n };\n if (!this._comChannel.send(sdp)) {\n throw new Error(\"cannot send local SDP configuration to WebRTC peer\");\n }\n }\n }).catch((ex) => {\n if (this._state !== SessionState.closed) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"an unrecoverable error occurred during SDP handshake\",\n error: ex\n }));\n\n this.close();\n }\n });\n } else if (msg.ice) {\n const candidate = new RTCIceCandidate(msg.ice);\n this._rtcPeerConnection.addIceCandidate(candidate).catch((ex) => {\n if (this._state !== SessionState.closed) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"an unrecoverable error occurred during ICE handshake\",\n error: ex\n }));\n\n this.close();\n }\n });\n } else {\n throw new Error(`invalid empty peer message received from consumer session ${this._sessionId}`);\n }\n }\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport WebRTCSession from \"./webrtc-session.js\";\nimport SessionState from \"./session-state.js\";\n\n/**\n * @class GstWebRTCAPI.ClientSession\n * @hideconstructor\n * @classdesc Client session representing a link between a remote consumer and a local producer session.\n * @extends {GstWebRTCAPI.WebRTCSession}\n */\nclass ClientSession extends WebRTCSession {\n constructor(peerId, sessionId, comChannel, stream) {\n super(peerId, comChannel);\n this._sessionId = sessionId;\n this._state = SessionState.streaming;\n\n const connection = new RTCPeerConnection(this._comChannel.webrtcConfig);\n this._rtcPeerConnection = connection;\n\n for (const track of stream.getTracks()) {\n connection.addTrack(track, stream);\n }\n\n connection.onicecandidate = (event) => {\n if ((this._rtcPeerConnection === connection) && event.candidate && this._comChannel) {\n this._comChannel.send({\n type: \"peer\",\n sessionId: this._sessionId,\n ice: event.candidate.toJSON()\n });\n }\n };\n\n this.dispatchEvent(new Event(\"rtcPeerConnectionChanged\"));\n\n connection.setLocalDescription().then(() => {\n if ((this._rtcPeerConnection === connection) && this._comChannel) {\n const sdp = {\n type: \"peer\",\n sessionId: this._sessionId,\n sdp: this._rtcPeerConnection.localDescription.toJSON()\n };\n if (!this._comChannel.send(sdp)) {\n throw new Error(\"cannot send local SDP configuration to WebRTC peer\");\n }\n }\n }).catch((ex) => {\n if (this._state !== SessionState.closed) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"an unrecoverable error occurred during SDP handshake\",\n error: ex\n }));\n\n this.close();\n }\n });\n }\n\n onSessionPeerMessage(msg) {\n if ((this._state === SessionState.closed) || !this._rtcPeerConnection) {\n return;\n }\n\n if (msg.sdp) {\n this._rtcPeerConnection.setRemoteDescription(msg.sdp).catch((ex) => {\n if (this._state !== SessionState.closed) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"an unrecoverable error occurred during SDP handshake\",\n error: ex\n }));\n\n this.close();\n }\n });\n } else if (msg.ice) {\n const candidate = new RTCIceCandidate(msg.ice);\n this._rtcPeerConnection.addIceCandidate(candidate).catch((ex) => {\n if (this._state !== SessionState.closed) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"an unrecoverable error occurred during ICE handshake\",\n error: ex\n }));\n\n this.close();\n }\n });\n } else {\n throw new Error(`invalid empty peer message received from producer's client session ${this._peerId}`);\n }\n }\n}\n\n/**\n * Event name: \"clientConsumerAdded\".<br>\n * Triggered when a remote consumer peer connects to a local {@link GstWebRTCAPI.ProducerSession}.\n * @event GstWebRTCAPI#ClientConsumerAddedEvent\n * @type {external:CustomEvent}\n * @property {GstWebRTCAPI.ClientSession} detail - The WebRTC session associated with the added consumer peer.\n * @see GstWebRTCAPI.ProducerSession\n */\n/**\n * Event name: \"clientConsumerRemoved\".<br>\n * Triggered when a remote consumer peer disconnects from a local {@link GstWebRTCAPI.ProducerSession}.\n * @event GstWebRTCAPI#ClientConsumerRemovedEvent\n * @type {external:CustomEvent}\n * @property {GstWebRTCAPI.ClientSession} detail - The WebRTC session associated with the removed consumer peer.\n * @see GstWebRTCAPI.ProducerSession\n */\n\n/**\n * @class GstWebRTCAPI.ProducerSession\n * @hideconstructor\n * @classdesc Producer session managing the streaming out of a local {@link external:MediaStream}.<br>\n * It manages all underlying WebRTC connections to each peer client consuming the stream.\n * <p>Call {@link GstWebRTCAPI#createProducerSession} to create a ProducerSession instance.</p>\n * @extends {external:EventTarget}\n * @fires {@link GstWebRTCAPI#event:ErrorEvent}\n * @fires {@link GstWebRTCAPI#event:StateChangedEvent}\n * @fires {@link GstWebRTCAPI#event:ClosedEvent}\n * @fires {@link GstWebRTCAPI#event:ClientConsumerAddedEvent}\n * @fires {@link GstWebRTCAPI#event:ClientConsumerRemovedEvent}\n */\nexport default class ProducerSession extends EventTarget {\n constructor(comChannel, stream) {\n super();\n\n this._comChannel = comChannel;\n this._stream = stream;\n this._state = SessionState.idle;\n this._clientSessions = {};\n }\n\n /**\n * The local stream produced out by this session.\n * @member {external:MediaStream} GstWebRTCAPI.ProducerSession#stream\n * @readonly\n */\n get stream() {\n return this._stream;\n }\n\n /**\n * The current producer session state.\n * @member {GstWebRTCAPI.SessionState} GstWebRTCAPI.ProducerSession#state\n * @readonly\n */\n get state() {\n return this._state;\n }\n\n /**\n * Starts the producer session.<br>\n * This method must be called after creating the producer session in order to start streaming. It registers this\n * producer session to the signaling server and gets ready to serve peer requests from consumers.\n * <p>Even on success, streaming can fail later if any error occurs during or after connection. In order to know\n * the effective streaming state, you should be listening to the [error]{@link GstWebRTCAPI#event:ErrorEvent},\n * [stateChanged]{@link GstWebRTCAPI#event:StateChangedEvent} and/or [closed]{@link GstWebRTCAPI#event:ClosedEvent}\n * events.</p>\n * @method GstWebRTCAPI.ProducerSession#start\n * @returns {boolean} true in case of success (may fail later during or after connection) or false in case of\n * immediate error (wrong session state or no connection to the signaling server).\n */\n start() {\n if (!this._comChannel || (this._state === SessionState.closed)) {\n return false;\n }\n\n if (this._state !== SessionState.idle) {\n return true;\n }\n\n const msg = {\n type: \"setPeerStatus\",\n roles: [\"listener\", \"producer\"],\n meta: this._comChannel.meta\n };\n if (!this._comChannel.send(msg)) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"cannot start producer session\",\n error: new Error(\"cannot register producer to signaling server\")\n }));\n\n this.close();\n return false;\n }\n\n this._state = SessionState.connecting;\n this.dispatchEvent(new Event(\"stateChanged\"));\n return true;\n }\n\n /**\n * Terminates the producer session.<br>\n * It immediately disconnects all peer consumers attached to this producer session and unregisters the producer\n * from the signaling server.\n * @method GstWebRTCAPI.ProducerSession#close\n */\n close() {\n if (this._state !== SessionState.closed) {\n for (const track of this._stream.getTracks()) {\n track.stop();\n }\n\n if ((this._state !== SessionState.idle) && this._comChannel) {\n this._comChannel.send({\n type: \"setPeerStatus\",\n roles: [\"listener\"],\n meta: this._comChannel.meta\n });\n }\n\n this._state = SessionState.closed;\n this.dispatchEvent(new Event(\"stateChanged\"));\n\n this._comChannel = null;\n this._stream = null;\n\n for (const clientSession of Object.values(this._clientSessions)) {\n clientSession.close();\n }\n this._clientSessions = {};\n\n this.dispatchEvent(new Event(\"closed\"));\n }\n }\n\n onProducerRegistered() {\n if (this._state === SessionState.connecting) {\n this._state = SessionState.streaming;\n this.dispatchEvent(new Event(\"stateChanged\"));\n }\n }\n\n onStartSessionMessage(msg) {\n if (this._comChannel && this._stream && !(msg.sessionId in this._clientSessions)) {\n const session = new ClientSession(msg.peerId, msg.sessionId, this._comChannel, this._stream);\n this._clientSessions[msg.sessionId] = session;\n\n session.addEventListener(\"closed\", (event) => {\n const sessionId = event.target.sessionId;\n if ((sessionId in this._clientSessions) && (this._clientSessions[sessionId] === session)) {\n delete this._clientSessions[sessionId];\n this.dispatchEvent(new CustomEvent(\"clientConsumerRemoved\", { detail: session }));\n }\n });\n\n session.addEventListener(\"error\", (event) => {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: `error from client consumer ${event.target.peerId}: ${event.message}`,\n error: event.error\n }));\n });\n\n this.dispatchEvent(new CustomEvent(\"clientConsumerAdded\", { detail: session }));\n }\n }\n\n onEndSessionMessage(msg) {\n if (msg.sessionId in this._clientSessions) {\n this._clientSessions[msg.sessionId].close();\n }\n }\n\n onSessionPeerMessage(msg) {\n if (msg.sessionId in this._clientSessions) {\n this._clientSessions[msg.sessionId].onSessionPeerMessage(msg);\n }\n }\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport ConsumerSession from \"./consumer-session.js\";\nimport ProducerSession from \"./producer-session.js\";\n\nconst SignallingServerMessageType = Object.freeze({\n welcome: \"welcome\",\n peerStatusChanged: \"peerStatusChanged\",\n list: \"list\",\n sessionStarted: \"sessionStarted\",\n peer: \"peer\",\n startSession: \"startSession\",\n endSession: \"endSession\",\n error: \"error\"\n});\n\nfunction normalizeProducer(producer, excludedId) {\n if (!producer || (typeof (producer) !== \"object\")) {\n return null;\n }\n\n const normalizedProducer = {\n id: \"\",\n meta: {}\n };\n\n if (producer.id && (typeof (producer.id) === \"string\")) {\n normalizedProducer.id = producer.id;\n } else if (producer.peerId && (typeof (producer.peerId) === \"string\")) {\n normalizedProducer.id = producer.peerId;\n } else {\n return null;\n }\n\n if (normalizedProducer.id === excludedId) {\n return null;\n }\n\n if (producer.meta && (typeof (producer.meta) === \"object\")) {\n normalizedProducer.meta = producer.meta;\n }\n\n Object.freeze(normalizedProducer.meta);\n return Object.freeze(normalizedProducer);\n}\n\nexport default class ComChannel extends EventTarget {\n constructor(url, meta, webrtcConfig) {\n super();\n\n this._meta = meta;\n this._webrtcConfig = webrtcConfig;\n this._ws = new WebSocket(url);\n this._ready = false;\n this._channelId = \"\";\n this._producerSession = null;\n this._consumerSessions = {};\n\n this._ws.onerror = (event) => {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: event.message || \"WebSocket error\",\n error: event.error || new Error(\n this._ready ? \"transportation error\" : \"cannot connect to signaling server\")\n }));\n this.close();\n };\n\n this._ws.onclose = () => {\n this._ready = false;\n this._channelId = \"\";\n this._ws = null;\n\n this.closeAllConsumerSessions();\n\n if (this._producerSession) {\n this._producerSession.close();\n this._producerSession = null;\n }\n\n this.dispatchEvent(new Event(\"closed\"));\n };\n\n this._ws.onmessage = (event) => {\n try {\n const msg = JSON.parse(event.data);\n if (msg && (typeof (msg) === \"object\")) {\n switch (msg.type) {\n\n case SignallingServerMessageType.welcome:\n this._channelId = msg.peerId;\n try {\n this._ws.send(JSON.stringify({\n type: \"setPeerStatus\",\n roles: [\"listener\"],\n meta: meta\n }));\n } catch (ex) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"cannot initialize connection to signaling server\",\n error: ex\n }));\n this.close();\n }\n break;\n\n case SignallingServerMessageType.peerStatusChanged:\n if (msg.peerId === this._channelId) {\n if (!this._ready && msg.roles.includes(\"listener\")) {\n this._ready = true;\n this.dispatchEvent(new Event(\"ready\"));\n this.send({ type: \"list\" });\n }\n\n if (this._producerSession && msg.roles.includes(\"producer\")) {\n this._producerSession.onProducerRegistered();\n }\n } else {\n const normalizedProducer = normalizeProducer(msg, this._channelId);\n if (normalizedProducer) {\n if (msg.roles.includes(\"producer\")) {\n this.dispatchEvent(new CustomEvent(\"producerAdded\", { detail: normalizedProducer }));\n } else {\n this.dispatchEvent(new CustomEvent(\"producerRemoved\", { detail: normalizedProducer }));\n }\n }\n }\n break;\n\n case SignallingServerMessageType.list:\n for (const producer of msg.producers) {\n const normalizedProducer = normalizeProducer(producer, this._channelId);\n if (normalizedProducer) {\n this.dispatchEvent(new CustomEvent(\"producerAdded\", { detail: normalizedProducer }));\n }\n }\n break;\n\n case SignallingServerMessageType.sessionStarted:\n {\n const session = this.getConsumerSession(msg.peerId);\n if (session) {\n delete this._consumerSessions[msg.peerId];\n\n session.onSessionStarted(msg.peerId, msg.sessionId);\n if (session.sessionId && !(session.sessionId in this._consumerSessions)) {\n this._consumerSessions[session.sessionId] = session;\n } else {\n session.close();\n }\n }\n }\n break;\n\n case SignallingServerMessageType.peer:\n {\n const session = this.getConsumerSession(msg.sessionId);\n if (session) {\n session.onSessionPeerMessage(msg);\n } else if (this._producerSession) {\n this._producerSession.onSessionPeerMessage(msg);\n }\n }\n break;\n\n case SignallingServerMessageType.startSession:\n if (this._producerSession) {\n this._producerSession.onStartSessionMessage(msg);\n }\n break;\n\n case SignallingServerMessageType.endSession:\n {\n const session = this.getConsumerSession(msg.sessionId);\n if (session) {\n session.close();\n } else if (this._producerSession) {\n this._producerSession.onEndSessionMessage(msg);\n }\n }\n break;\n\n case SignallingServerMessageType.error:\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"error received from signaling server\",\n error: new Error(msg.details)\n }));\n break;\n\n default:\n throw new Error(`unknown message type: \"${msg.type}\"`);\n }\n }\n } catch (ex) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"cannot parse incoming message from signaling server\",\n error: ex\n }));\n }\n };\n }\n\n get meta() {\n return this._meta;\n }\n\n get webrtcConfig() {\n return this._webrtcConfig;\n }\n\n get ready() {\n return this._ready;\n }\n\n get channelId() {\n return this._channelId;\n }\n\n get producerSession() {\n return this._producerSession;\n }\n\n createProducerSession(stream) {\n if (!this._ready || !(stream instanceof MediaStream)) {\n return null;\n }\n\n if (this._producerSession) {\n if (this._producerSession.stream === stream) {\n return this._producerSession;\n } else {\n return null;\n }\n }\n\n const session = new ProducerSession(this, stream);\n this._producerSession = session;\n\n session.addEventListener(\"closed\", () => {\n if (this._producerSession === session) {\n this._producerSession = null;\n }\n });\n\n return session;\n }\n\n createConsumerSession(producerId) {\n if (!this._ready || !producerId || (typeof (producerId) !== \"string\")) {\n return null;\n }\n\n if (producerId in this._consumerSessions) {\n return this._consumerSessions[producerId];\n }\n\n for (const session of Object.values(this._consumerSessions)) {\n if (session.peerId === producerId) {\n return session;\n }\n }\n\n const session = new ConsumerSession(producerId, this);\n this._consumerSessions[producerId] = session;\n\n session.addEventListener(\"closed\", (event) => {\n let sessionId = event.target.sessionId;\n if (!sessionId) {\n sessionId = event.target.peerId;\n }\n\n if ((sessionId in this._consumerSessions) && (this._consumerSessions[sessionId] === session)) {\n delete this._consumerSessions[sessionId];\n }\n });\n\n return session;\n }\n\n getConsumerSession(sessionId) {\n if (sessionId in this._consumerSessions) {\n return this._consumerSessions[sessionId];\n } else {\n return null;\n }\n }\n\n closeAllConsumerSessions() {\n for (const session of Object.values(this._consumerSessions)) {\n session.close();\n }\n\n this._consumerSessions = {};\n }\n\n send(data) {\n if (this._ready && data && (typeof (data) === \"object\")) {\n try {\n this._ws.send(JSON.stringify(data));\n return true;\n } catch (ex) {\n this.dispatchEvent(new ErrorEvent(\"error\", {\n message: \"cannot send message to signaling server\",\n error: ex\n }));\n }\n }\n\n return false;\n }\n\n close() {\n if (this._ws) {\n this._ready = false;\n this._channelId = \"\";\n this._ws.close();\n\n this.closeAllConsumerSessions();\n\n if (this._producerSession) {\n this._producerSession.close();\n this._producerSession = null;\n }\n }\n }\n}\n","/*\n * gstwebrtc-api\n *\n * Copyright (C) 2022 Igalia S.L. <info@igalia.com>\n * Author: Loïc Le Page <llepage@igalia.com>\n *\n * This Source Code Form is subject to the terms of the Mozilla Public\n * License, v. 2.0. If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport defaultConfig from \"./config.js\";\nimport ComChannel from \"./com-channel.js\";\nimport SessionState from \"./session-state.js\";\n\n/**\n * @class GstWebRTCAPI\n * @classdesc The API entry point that manages a WebRTC.\n */\nexport default class GstWebRTCAPI {\n /**\n * @constructor GstWebRTCAPI\n * @param {GstWebRTCConfig} [userConfig] - The user configuration.<br>Only the parameters different from the default\n * ones need to be provided.\n */\n constructor(userConfig) {\n this._channel = null;\n this._producers = {};\n this._connectionListeners = [];\n this._producersListeners = [];\n\n const config = Object.assign({}, defaultConfig);\n if (userConfig && (typeof (userConfig) === \"object\")) {\n Object.assign(config, userConfig);\n }\n\n if (typeof (config.meta) !== \"object\") {\n config.meta = null;\n }\n\n this._config = config;\n this.connectChannel();\n }\n\n /**\n * @interface GstWebRTCAPI.ConnectionListener\n */\n /**\n * Callback method called when this client connects to the WebRTC signaling server.\n * The callback implementation should not throw any exception.\n * @method GstWebRTCAPI.ConnectionListener#connected\n * @abstract\n * @param {string} clientId - The unique identifier of this WebRTC client.<br>This identifier is provided by the\n * signaling server to uniquely identify each connected peer.\n */\n /**\n * Callback method called when this client disconnects from the WebRTC signaling server.\n * The callback implementation should not throw any exception.\n * @method GstWebRTCAPI.ConnectionListener#disconnected\n * @abstract\n */\n\n /**\n * Registers a connection listener that will be called each time the WebRTC API connects to or disconnects from the\n * signaling server.\n * @method GstWebRTCAPI#registerConnectionListener\n * @param {GstWebRTCAPI.ConnectionListener} listener - The connection listener to register.\n * @returns {boolean} true in case of success (or if the listener was already registered), or false if the listener\n * doesn't implement all callback functions and cannot be registered.\n */\n registerConnectionListener(listener) {\n if (!listener || (typeof (listener) !== \"object\") ||\n (typeof (listener.connected) !== \"function\") ||\n (typeof (listener.disconnected) !== \"function\")) {\n return false;\n }\n\n if (!this._connectionListeners.includes(listener)) {\n this._connectionListeners.push(listener);\n }\n\n return true;\n }\n\n /**\n * Unregisters a connection listener.<br>\n * The removed listener will never be called again and can be garbage collected.\n * @method GstWebRTCAPI#unregisterConnectionListener\n * @param {GstWebRTCAPI.ConnectionListener} listener - The connection listener to unregister.\n * @returns {boolean} true if the listener is found and unregistered, or false if the listener was not previously\n * registered.\n */\n unregisterConnectionListener(listener) {\n const idx = this._connectionListeners.indexOf(listener);\n if (idx >= 0) {\n this._connectionListeners.splice(idx, 1);\n return true;\n }\n\n return false;\n }\n\n /**\n * Unregisters all previously registered connection listeners.\n * @method GstWebRTCAPI#unregisterAllConnectionListeners\n */\n unregisterAllConnectionListeners() {\n this._connectionListeners = [];\n }\n\n /**\n * Creates a new producer session.\n * <p>You can only create one producer session at a time.<br>\n * To request streaming from a new stream you will first need to close the previous producer session.</p>\n * <p>You can only request a producer session while you are connected to the signaling server. You can use the\n * {@link GstWebRTCAPI.ConnectionListener} interface and {@link GstWebRTCAPI#registerConnectionListener} method to\n * listen to the connection state.</p>\n * @method GstWebRTCAPI#createProducerSession\n * @param {external:MediaStream} stream - The audio/video stream to offer as a producer through WebRTC.\n * @returns {GstWebRTCAPI.ProducerSession} The created producer session or null in case of error. To start streaming,\n * you still need to call {@link GstWebRTCAPI.ProducerSession#start} after adding on the returned session all the event\n * listeners you may need.\n */\n createProducerSession(stream) {\n if (this._channel) {\n return this._channel.createProducerSession(stream);\n }\n return null;\n }\n\n /**\n * Information about a remote producer registered by the signaling server.\n * @typedef {object} GstWebRTCAPI.Producer\n * @readonly\n * @property {string} id - The remote producer unique identifier set by the signaling server (always non-empty).\n * @property {object} meta - Free-form object containing extra information about the remote producer (always non-null,\n * but may be empty). Its content depends on your application.\n */\n\n /**\n * Gets the list of all remote WebRTC producers available on the signaling server.\n * <p>The remote producers list is only populated once you've connected to the signaling server. You can use the\n * {@link GstWebRTCAPI.ConnectionListener} interface and {@link GstWebRTCAPI#registerConnectionListener} method to\n * listen to the connection state.</p>\n * @method GstWebRTCAPI#getAvailableProducers\n * @returns {GstWebRTCAPI.Producer[]} The list of remote WebRTC producers available.\n */\n getAvailableProducers() {\n return Object.values(this._producers);\n }\n\n /**\n * @interface GstWebRTCAPI.ProducersListener\n */\n /**\n * Callback method called when a remote producer is added on the signaling server.\n * The callback implementation should not throw any exception.\n * @method GstWebRTCAPI.ProducersListener#producerAdded\n * @abstract\n * @param {GstWebRTCAPI.Producer} producer - The remote producer added on server-side.\n */\n /**\n * Callback method called when a remote producer is removed from the signaling server.\n * The callback implementation should not throw any exception.\n * @method GstWebRTCAPI.ProducersListener#producerRemoved\n * @abstract\n * @param {GstWebRTCAPI.Producer} producer - The remote producer removed on server-side.\n */\n\n /**\n * Registers a producers listener that will be called each time a producer is added or removed on the signaling\n * server.\n * @method GstWebRTCAPI#registerProducersListener\n * @param {GstWebRTCAPI.ProducersListener} listener - The producer listener to register.\n * @returns {boolean} true in case of success (or if the listener was already registered), or false if the listener\n * doesn't implement all callback functions and cannot be registered.\n */\n registerProducersListener(listener) {\n if (!listener || (typeof (listener) !== \"object\") ||\n (typeof (listener.producerAdded) !== \"function\") ||\n (typeof (listener.producerRemoved) !== \"function\")) {\n return false;\n }\n\n if (!this._producersListeners.includes(listener)) {\n this._producersListeners.push(listener);\n }\n\n return true;\n }\n\n /**\n * Unregisters a producers listener.<br>\n * The removed listener will never be called again and can be garbage collected.\n * @method GstWebRTCAPI#unregisterProducersListener\n * @param {GstWebRTCAPI.ProducersListener} listener - The producers listener to unregister.\n * @returns {boolean} true if the listener is found and unregistered, or false if the listener was not previously\n * registered.\n */\n unregisterProducersListener(listener) {\n const idx = this._producersListeners.indexOf(listener);\n if (idx >= 0) {\n this._producersListeners.splice(idx, 1);\n return true;\n }\n\n return false;\n }\n\n /**\n * Unregisters all previously registered producers listeners.\n * @method GstWebRTCAPI#unregisterAllProducersListeners\n */\n unregisterAllProducersListeners() {\n this._producersListeners = [];\n }\n\n /**\n * Creates a consumer session by connecting the local client to a remote WebRTC producer.\n * <p>You can only create one consumer session per remote producer.</p>\n * <p>You can only request a new consumer session while you are connected to the signaling server. You can use the\n * {@link GstWebRTCAPI.ConnectionListener} interface and {@link GstWebRTCAPI#registerConnectionListener} method to\n * listen to the connection state.</p>\n * @method GstWebRTCAPI#createConsumerSession\n * @param {string} producerId - The unique identifier of the remote producer to connect to.\n * @returns {GstWebRTCAPI.ConsumerSession} The WebRTC session between the selected remote producer and this local\n * consumer, or null in case of error. 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If a copy of the MPL was not distributed with this\n * file, You can obtain one at http://mozilla.org/MPL/2.0/.\n */\n\nimport \"webrtc-adapter\";\nimport GstWebRTCAPI from \"./gstwebrtc-api.js\";\n\n/**\n * @external MediaStream\n * @see https://developer.mozilla.org/en-US/docs/Web/API/MediaStream\n */\n/**\n * @external RTCPeerConnection\n * @see https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection\n */\n/**\n * @external RTCDataChannel\n * @see https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel\n */\n/**\n * @external EventTarget\n * @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget\n */\n/**\n * @external Event\n * @see https://developer.mozilla.org/en-US/docs/Web/API/Event\n */\n/**\n * @external ErrorEvent\n * @see https://developer.mozilla.org/en-US/docs/Web/API/ErrorEvent\n */\n/**\n * @external CustomEvent\n * @see https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent\n */\n/**\n * @external Error\n * @see 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