@fctv/js/dist/index.min.js

Call SDK for JavaScript

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t=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(t,"a",t),t},n.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},n.p="",n(n.s=4)}([function(e,t){navigator.mediaDevices||(navigator.mediaDevices={});var n=function(e){return navigator.mediaDevices.getUserMedia||(navigator.mediaDevices.getUserMedia=function(e){var t=navigator.webkitGetUserMedia||navigator.mozGetUserMedia;return t?new Promise((function(n,r){t.call(navigator,e,n,r)})):Promise.reject(new Error("getUserMedia is not implemented in this browser"))}),navigator.mediaDevices.getUserMedia(e)};e.exports={RTCPeerConnection:window.RTCPeerConnection,getUserMedia:n,getDisplayMedia:navigator.mediaDevices.getDisplayMedia?function(e){return navigator.mediaDevices.getDisplayMedia(e)}:null,enumerateDevices:function(e){return navigator.mediaDevices.enumerateDevices?e?navigator.mediaDevices.enumerateDevices().then((function(t){return t.filter((function(t){return t.kind===e}))})):navigator.mediaDevices.enumerateDevices():(console.log("enumerateDevices() not supported."),Promise.resolve([]))},getSupportedConstraints:function(){return navigator.mediaDevices.getSupportedConstraints?navigator.mediaDevices.getSupportedConstraints():{}},checkUserMediaPermission:function(e){return new Promise((function(t){n(e).then((function(e){return e.getTracks().forEach((function(e){e.stop()})),t(!0)})).catch((function(e){return t(!1)}))}))}}},function(e,t,n){"use strict";var r={generateIdentifier:function(){return Math.random().toString(36).substr(2,10)}};r.localCName=r.generateIdentifier(),r.splitLines=function(e){return e.trim().split("\n").map((function(e){return e.trim()}))},r.splitSections=function(e){return e.split("\nm=").map((function(e,t){return(t>0?"m="+e:e).trim()+"\r\n"}))},r.getDescription=function(e){var t=r.splitSections(e);return t&&t[0]},r.getMediaSections=function(e){var t=r.splitSections(e);return t.shift(),t},r.matchPrefix=function(e,t){return r.splitLines(e).filter((function(e){return 0===e.indexOf(t)}))},r.parseCandidate=function(e){for(var t,n={foundation:(t=0===e.indexOf("a=candidate:")?e.substring(12).split(" "):e.substring(10).split(" "))[0],component:parseInt(t[1],10),protocol:t[2].toLowerCase(),priority:parseInt(t[3],10),ip:t[4],address:t[4],port:parseInt(t[5],10),type:t[7]},r=8;r<t.length;r+=2)switch(t[r]){case"raddr":n.relatedAddress=t[r+1];break;case"rport":n.relatedPort=parseInt(t[r+1],10);break;case"tcptype":n.tcpType=t[r+1];break;case"ufrag":n.ufrag=t[r+1],n.usernameFragment=t[r+1];break;default:n[t[r]]=t[r+1]}return n},r.writeCandidate=function(e){var t=[];t.push(e.foundation),t.push(e.component),t.push(e.protocol.toUpperCase()),t.push(e.priority),t.push(e.address||e.ip),t.push(e.port);var n=e.type;return t.push("typ"),t.push(n),"host"!==n&&e.relatedAddress&&e.relatedPort&&(t.push("raddr"),t.push(e.relatedAddress),t.push("rport"),t.push(e.relatedPort)),e.tcpType&&"tcp"===e.protocol.toLowerCase()&&(t.push("tcptype"),t.push(e.tcpType)),(e.usernameFragment||e.ufrag)&&(t.push("ufrag"),t.push(e.usernameFragment||e.ufrag)),"candidate:"+t.join(" ")},r.parseIceOptions=function(e){return e.substr(14).split(" ")},r.parseRtpMap=function(e){var t=e.substr(9).split(" "),n={payloadType:parseInt(t.shift(),10)};return t=t[0].split("/"),n.name=t[0],n.clockRate=parseInt(t[1],10),n.channels=3===t.length?parseInt(t[2],10):1,n.numChannels=n.channels,n},r.writeRtpMap=function(e){var t=e.payloadType;void 0!==e.preferredPayloadType&&(t=e.preferredPayloadType);var n=e.channels||e.numChannels||1;return"a=rtpmap:"+t+" "+e.name+"/"+e.clockRate+(1!==n?"/"+n:"")+"\r\n"},r.parseExtmap=function(e){var t=e.substr(9).split(" ");return{id:parseInt(t[0],10),direction:t[0].indexOf("/")>0?t[0].split("/")[1]:"sendrecv",uri:t[1]}},r.writeExtmap=function(e){return"a=extmap:"+(e.id||e.preferredId)+(e.direction&&"sendrecv"!==e.direction?"/"+e.direction:"")+" "+e.uri+"\r\n"},r.parseFmtp=function(e){for(var t,n={},r=e.substr(e.indexOf(" ")+1).split(";"),i=0;i<r.length;i++)n[(t=r[i].trim().split("="))[0].trim()]=t[1];return n},r.writeFmtp=function(e){var t="",n=e.payloadType;if(void 0!==e.preferredPayloadType&&(n=e.preferredPayloadType),e.parameters&&Object.keys(e.parameters).length){var r=[];Object.keys(e.parameters).forEach((function(t){e.parameters[t]?r.push(t+"="+e.parameters[t]):r.push(t)})),t+="a=fmtp:"+n+" "+r.join(";")+"\r\n"}return t},r.parseRtcpFb=function(e){var t=e.substr(e.indexOf(" ")+1).split(" ");return{type:t.shift(),parameter:t.join(" ")}},r.writeRtcpFb=function(e){var t="",n=e.payloadType;return void 0!==e.preferredPayloadType&&(n=e.preferredPayloadType),e.rtcpFeedback&&e.rtcpFeedback.length&&e.rtcpFeedback.forEach((function(e){t+="a=rtcp-fb:"+n+" "+e.type+(e.parameter&&e.parameter.length?" "+e.parameter:"")+"\r\n"})),t},r.parseSsrcMedia=function(e){var t=e.indexOf(" "),n={ssrc:parseInt(e.substr(7,t-7),10)},r=e.indexOf(":",t);return r>-1?(n.attribute=e.substr(t+1,r-t-1),n.value=e.substr(r+1)):n.attribute=e.substr(t+1),n},r.parseSsrcGroup=function(e){var t=e.substr(13).split(" ");return{semantics:t.shift(),ssrcs:t.map((function(e){return parseInt(e,10)}))}},r.getMid=function(e){var t=r.matchPrefix(e,"a=mid:")[0];if(t)return t.substr(6)},r.parseFingerprint=function(e){var t=e.substr(14).split(" ");return{algorithm:t[0].toLowerCase(),value:t[1]}},r.getDtlsParameters=function(e,t){return{role:"auto",fingerprints:r.matchPrefix(e+t,"a=fingerprint:").map(r.parseFingerprint)}},r.writeDtlsParameters=function(e,t){var n="a=setup:"+t+"\r\n";return e.fingerprints.forEach((function(e){n+="a=fingerprint:"+e.algorithm+" "+e.value+"\r\n"})),n},r.parseCryptoLine=function(e){var t=e.substr(9).split(" ");return{tag:parseInt(t[0],10),cryptoSuite:t[1],keyParams:t[2],sessionParams:t.slice(3)}},r.writeCryptoLine=function(e){return"a=crypto:"+e.tag+" "+e.cryptoSuite+" "+("object"==typeof e.keyParams?r.writeCryptoKeyParams(e.keyParams):e.keyParams)+(e.sessionParams?" "+e.sessionParams.join(" "):"")+"\r\n"},r.parseCryptoKeyParams=function(e){if(0!==e.indexOf("inline:"))return null;var t=e.substr(7).split("|");return{keyMethod:"inline",keySalt:t[0],lifeTime:t[1],mkiValue:t[2]?t[2].split(":")[0]:void 0,mkiLength:t[2]?t[2].split(":")[1]:void 0}},r.writeCryptoKeyParams=function(e){return e.keyMethod+":"+e.keySalt+(e.lifeTime?"|"+e.lifeTime:"")+(e.mkiValue&&e.mkiLength?"|"+e.mkiValue+":"+e.mkiLength:"")},r.getCryptoParameters=function(e,t){return r.matchPrefix(e+t,"a=crypto:").map(r.parseCryptoLine)},r.getIceParameters=function(e,t){var n=r.matchPrefix(e+t,"a=ice-ufrag:")[0],i=r.matchPrefix(e+t,"a=ice-pwd:")[0];return n&&i?{usernameFragment:n.substr(12),password:i.substr(10)}:null},r.writeIceParameters=function(e){return"a=ice-ufrag:"+e.usernameFragment+"\r\na=ice-pwd:"+e.password+"\r\n"},r.parseRtpParameters=function(e){for(var t={codecs:[],headerExtensions:[],fecMechanisms:[],rtcp:[]},n=r.splitLines(e)[0].split(" "),i=3;i<n.length;i++){var o=n[i],s=r.matchPrefix(e,"a=rtpmap:"+o+" ")[0];if(s){var a=r.parseRtpMap(s),c=r.matchPrefix(e,"a=fmtp:"+o+" ");switch(a.parameters=c.length?r.parseFmtp(c[0]):{},a.rtcpFeedback=r.matchPrefix(e,"a=rtcp-fb:"+o+" ").map(r.parseRtcpFb),t.codecs.push(a),a.name.toUpperCase()){case"RED":case"ULPFEC":t.fecMechanisms.push(a.name.toUpperCase())}}}return r.matchPrefix(e,"a=extmap:").forEach((function(e){t.headerExtensions.push(r.parseExtmap(e))})),t},r.writeRtpDescription=function(e,t){var n="";n+="m="+e+" ",n+=t.codecs.length>0?"9":"0",n+=" UDP/TLS/RTP/SAVPF ",n+=t.codecs.map((function(e){return void 0!==e.preferredPayloadType?e.preferredPayloadType:e.payloadType})).join(" ")+"\r\n",n+="c=IN IP4 0.0.0.0\r\n",n+="a=rtcp:9 IN IP4 0.0.0.0\r\n",t.codecs.forEach((function(e){n+=r.writeRtpMap(e),n+=r.writeFmtp(e),n+=r.writeRtcpFb(e)}));var i=0;return t.codecs.forEach((function(e){e.maxptime>i&&(i=e.maxptime)})),i>0&&(n+="a=maxptime:"+i+"\r\n"),n+="a=rtcp-mux\r\n",t.headerExtensions&&t.headerExtensions.forEach((function(e){n+=r.writeExtmap(e)})),n},r.parseRtpEncodingParameters=function(e){var t,n=[],i=r.parseRtpParameters(e),o=-1!==i.fecMechanisms.indexOf("RED"),s=-1!==i.fecMechanisms.indexOf("ULPFEC"),a=r.matchPrefix(e,"a=ssrc:").map((function(e){return r.parseSsrcMedia(e)})).filter((function(e){return"cname"===e.attribute})),c=a.length>0&&a[0].ssrc,d=r.matchPrefix(e,"a=ssrc-group:FID").map((function(e){return e.substr(17).split(" ").map((function(e){return parseInt(e,10)}))}));d.length>0&&d[0].length>1&&d[0][0]===c&&(t=d[0][1]),i.codecs.forEach((function(e){if("RTX"===e.name.toUpperCase()&&e.parameters.apt){var r={ssrc:c,codecPayloadType:parseInt(e.parameters.apt,10)};c&&t&&(r.rtx={ssrc:t}),n.push(r),o&&((r=JSON.parse(JSON.stringify(r))).fec={ssrc:c,mechanism:s?"red+ulpfec":"red"},n.push(r))}})),0===n.length&&c&&n.push({ssrc:c});var l=r.matchPrefix(e,"b=");return l.length&&(l=0===l[0].indexOf("b=TIAS:")?parseInt(l[0].substr(7),10):0===l[0].indexOf("b=AS:")?1e3*parseInt(l[0].substr(5),10)*.95-16e3:void 0,n.forEach((function(e){e.maxBitrate=l}))),n},r.parseRtcpParameters=function(e){var t={},n=r.matchPrefix(e,"a=ssrc:").map((function(e){return r.parseSsrcMedia(e)})).filter((function(e){return"cname"===e.attribute}))[0];n&&(t.cname=n.value,t.ssrc=n.ssrc);var i=r.matchPrefix(e,"a=rtcp-rsize");t.reducedSize=i.length>0,t.compound=0===i.length;var o=r.matchPrefix(e,"a=rtcp-mux");return t.mux=o.length>0,t},r.parseMsid=function(e){var t,n=r.matchPrefix(e,"a=msid:");if(1===n.length)return{stream:(t=n[0].substr(7).split(" "))[0],track:t[1]};var i=r.matchPrefix(e,"a=ssrc:").map((function(e){return r.parseSsrcMedia(e)})).filter((function(e){return"msid"===e.attribute}));return i.length>0?{stream:(t=i[0].value.split(" "))[0],track:t[1]}:void 0},r.parseSctpDescription=function(e){var t,n=r.parseMLine(e),i=r.matchPrefix(e,"a=max-message-size:");i.length>0&&(t=parseInt(i[0].substr(19),10)),isNaN(t)&&(t=65536);var o=r.matchPrefix(e,"a=sctp-port:");if(o.length>0)return{port:parseInt(o[0].substr(12),10),protocol:n.fmt,maxMessageSize:t};if(r.matchPrefix(e,"a=sctpmap:").length>0){var s=r.matchPrefix(e,"a=sctpmap:")[0].substr(10).split(" ");return{port:parseInt(s[0],10),protocol:s[1],maxMessageSize:t}}},r.writeSctpDescription=function(e,t){var n=[];return n="DTLS/SCTP"!==e.protocol?["m="+e.kind+" 9 "+e.protocol+" "+t.protocol+"\r\n","c=IN IP4 0.0.0.0\r\n","a=sctp-port:"+t.port+"\r\n"]:["m="+e.kind+" 9 "+e.protocol+" "+t.port+"\r\n","c=IN IP4 0.0.0.0\r\n","a=sctpmap:"+t.port+" "+t.protocol+" 65535\r\n"],void 0!==t.maxMessageSize&&n.push("a=max-message-size:"+t.maxMessageSize+"\r\n"),n.join("")},r.generateSessionId=function(){return Math.random().toString().substr(2,21)},r.writeSessionBoilerplate=function(e,t,n){var i=void 0!==t?t:2;return"v=0\r\no="+(n||"thisisadapterortc")+" "+(e||r.generateSessionId())+" "+i+" IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\n"},r.writeMediaSection=function(e,t,n,i){var o=r.writeRtpDescription(e.kind,t);if(o+=r.writeIceParameters(e.iceGatherer.getLocalParameters()),o+=r.writeDtlsParameters(e.dtlsTransport.getLocalParameters(),"offer"===n?"actpass":"active"),o+="a=mid:"+e.mid+"\r\n",e.direction?o+="a="+e.direction+"\r\n":e.rtpSender&&e.rtpReceiver?o+="a=sendrecv\r\n":e.rtpSender?o+="a=sendonly\r\n":e.rtpReceiver?o+="a=recvonly\r\n":o+="a=inactive\r\n",e.rtpSender){var s="msid:"+i.id+" "+e.rtpSender.track.id+"\r\n";o+="a="+s,o+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" "+s,e.sendEncodingParameters[0].rtx&&(o+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" "+s,o+="a=ssrc-group:FID "+e.sendEncodingParameters[0].ssrc+" "+e.sendEncodingParameters[0].rtx.ssrc+"\r\n")}return o+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" cname:"+r.localCName+"\r\n",e.rtpSender&&e.sendEncodingParameters[0].rtx&&(o+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" cname:"+r.localCName+"\r\n"),o},r.getDirection=function(e,t){for(var n=r.splitLines(e),i=0;i<n.length;i++)switch(n[i]){case"a=sendrecv":case"a=sendonly":case"a=recvonly":case"a=inactive":return n[i].substr(2)}return t?r.getDirection(t):"sendrecv"},r.getKind=function(e){return r.splitLines(e)[0].split(" ")[0].substr(2)},r.isRejected=function(e){return"0"===e.split(" ",2)[1]},r.parseMLine=function(e){var t=r.splitLines(e)[0].substr(2).split(" ");return{kind:t[0],port:parseInt(t[1],10),protocol:t[2],fmt:t.slice(3).join(" ")}},r.parseOLine=function(e){var t=r.matchPrefix(e,"o=")[0].substr(2).split(" ");return{username:t[0],sessionId:t[1],sessionVersion:parseInt(t[2],10),netType:t[3],addressType:t[4],address:t[5]}},r.isValidSDP=function(e){if("string"!=typeof e||0===e.length)return!1;for(var t=r.splitLines(e),n=0;n<t.length;n++)if(t[n].length<2||"="!==t[n].charAt(1))return!1;return!0},e.exports=r},function(e,t){e.exports={sdpStereoHack:function(e){var t=e.split("\r\n"),n=t.findIndex((function(e){return/^a=rtpmap/.test(e)&&/opus\/48000/.test(e)&&!/stereo=1/.test(e)}));if(n<0)return e;var r=(s=t[n],a=s.match(/a=rtpmap:(\d+) \w+\/\d+/),a&&a.length>1?a[1]:null),i=new RegExp("^a=fmtp:".concat(r)),o=t.findIndex((function(e){return i.test(e)&&!/stereo=1/.test(e)}));var s,a;o<0?t[n]="".concat(t[n]).concat("\r\n","a=fmtp:").concat(r," stereo=1; sprop-stereo=1"):t[o]="".concat(t[o],"; stereo=1; sprop-stereo=1");return t.join("\r\n")}}},function(e,t,n){"use strict";var r=n(1);function i(e,t,n,i,o){var s=r.writeRtpDescription(e.kind,t);if(s+=r.writeIceParameters(e.iceGatherer.getLocalParameters()),s+=r.writeDtlsParameters(e.dtlsTransport.getLocalParameters(),"offer"===n?"actpass":o||"active"),s+="a=mid:"+e.mid+"\r\n",e.rtpSender&&e.rtpReceiver?s+="a=sendrecv\r\n":e.rtpSender?s+="a=sendonly\r\n":e.rtpReceiver?s+="a=recvonly\r\n":s+="a=inactive\r\n",e.rtpSender){var a=e.rtpSender._initialTrackId||e.rtpSender.track.id;e.rtpSender._initialTrackId=a;var c="msid:"+(i?i.id:"-")+" "+a+"\r\n";s+="a="+c,s+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" "+c,e.sendEncodingParameters[0].rtx&&(s+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" "+c,s+="a=ssrc-group:FID "+e.sendEncodingParameters[0].ssrc+" "+e.sendEncodingParameters[0].rtx.ssrc+"\r\n")}return s+="a=ssrc:"+e.sendEncodingParameters[0].ssrc+" cname:"+r.localCName+"\r\n",e.rtpSender&&e.sendEncodingParameters[0].rtx&&(s+="a=ssrc:"+e.sendEncodingParameters[0].rtx.ssrc+" cname:"+r.localCName+"\r\n"),s}function o(e,t){var n={codecs:[],headerExtensions:[],fecMechanisms:[]},r=function(e,t){e=parseInt(e,10);for(var n=0;n<t.length;n++)if(t[n].payloadType===e||t[n].preferredPayloadType===e)return t[n]},i=function(e,t,n,i){var o=r(e.parameters.apt,n),s=r(t.parameters.apt,i);return o&&s&&o.name.toLowerCase()===s.name.toLowerCase()};return e.codecs.forEach((function(r){for(var o=0;o<t.codecs.length;o++){var s=t.codecs[o];if(r.name.toLowerCase()===s.name.toLowerCase()&&r.clockRate===s.clockRate){if("rtx"===r.name.toLowerCase()&&r.parameters&&s.parameters.apt&&!i(r,s,e.codecs,t.codecs))continue;(s=JSON.parse(JSON.stringify(s))).numChannels=Math.min(r.numChannels,s.numChannels),n.codecs.push(s),s.rtcpFeedback=s.rtcpFeedback.filter((function(e){for(var t=0;t<r.rtcpFeedback.length;t++)if(r.rtcpFeedback[t].type===e.type&&r.rtcpFeedback[t].parameter===e.parameter)return!0;return!1}));break}}})),e.headerExtensions.forEach((function(e){for(var r=0;r<t.headerExtensions.length;r++){var i=t.headerExtensions[r];if(e.uri===i.uri){n.headerExtensions.push(i);break}}})),n}function s(e,t,n){return-1!=={offer:{setLocalDescription:["stable","have-local-offer"],setRemoteDescription:["stable","have-remote-offer"]},answer:{setLocalDescription:["have-remote-offer","have-local-pranswer"],setRemoteDescription:["have-local-offer","have-remote-pranswer"]}}[t][e].indexOf(n)}function a(e,t){var n=e.getRemoteCandidates().find((function(e){return t.foundation===e.foundation&&t.ip===e.ip&&t.port===e.port&&t.priority===e.priority&&t.protocol===e.protocol&&t.type===e.type}));return n||e.addRemoteCandidate(t),!n}function c(e,t){var n=new Error(t);return n.name=e,n.code={NotSupportedError:9,InvalidStateError:11,InvalidAccessError:15,TypeError:void 0,OperationError:void 0}[e],n}e.exports=function(e,t){function n(t,n){n.addTrack(t),n.dispatchEvent(new e.MediaStreamTrackEvent("addtrack",{track:t}))}function d(t,n,r,i){var o=new Event("track");o.track=n,o.receiver=r,o.transceiver={receiver:r},o.streams=i,e.setTimeout((function(){t._dispatchEvent("track",o)}))}var l=function(n){var i=this,o=document.createDocumentFragment();if(["addEventListener","removeEventListener","dispatchEvent"].forEach((function(e){i[e]=o[e].bind(o)})),this.canTrickleIceCandidates=null,this.needNegotiation=!1,this.localStreams=[],this.remoteStreams=[],this._localDescription=null,this._remoteDescription=null,this.signalingState="stable",this.iceConnectionState="new",this.connectionState="new",this.iceGatheringState="new",n=JSON.parse(JSON.stringify(n||{})),this.usingBundle="max-bundle"===n.bundlePolicy,"negotiate"===n.rtcpMuxPolicy)throw c("NotSupportedError","rtcpMuxPolicy 'negotiate' is not supported");switch(n.rtcpMuxPolicy||(n.rtcpMuxPolicy="require"),n.iceTransportPolicy){case"all":case"relay":break;default:n.iceTransportPolicy="all"}switch(n.bundlePolicy){case"balanced":case"max-compat":case"max-bundle":break;default:n.bundlePolicy="balanced"}if(n.iceServers=function(e,t){var n=!1;return(e=JSON.parse(JSON.stringify(e))).filter((function(e){if(e&&(e.urls||e.url)){var r=e.urls||e.url;e.url&&!e.urls&&console.warn("RTCIceServer.url is deprecated! Use urls instead.");var i="string"==typeof r;return i&&(r=[r]),r=r.filter((function(e){return 0===e.indexOf("turn:")&&-1!==e.indexOf("transport=udp")&&-1===e.indexOf("turn:[")&&!n?(n=!0,!0):0===e.indexOf("stun:")&&t>=14393&&-1===e.indexOf("?transport=udp")})),delete e.url,e.urls=i?r[0]:r,!!r.length}}))}(n.iceServers||[],t),this._iceGatherers=[],n.iceCandidatePoolSize)for(var s=n.iceCandidatePoolSize;s>0;s--)this._iceGatherers.push(new e.RTCIceGatherer({iceServers:n.iceServers,gatherPolicy:n.iceTransportPolicy}));else n.iceCandidatePoolSize=0;this._config=n,this.transceivers=[],this._sdpSessionId=r.generateSessionId(),this._sdpSessionVersion=0,this._dtlsRole=void 0,this._isClosed=!1};Object.defineProperty(l.prototype,"localDescription",{configurable:!0,get:function(){return this._localDescription}}),Object.defineProperty(l.prototype,"remoteDescription",{configurable:!0,get:function(){return this._remoteDescription}}),l.prototype.onicecandidate=null,l.prototype.onaddstream=null,l.prototype.ontrack=null,l.prototype.onremovestream=null,l.prototype.onsignalingstatechange=null,l.prototype.oniceconnectionstatechange=null,l.prototype.onconnectionstatechange=null,l.prototype.onicegatheringstatechange=null,l.prototype.onnegotiationneeded=null,l.prototype.ondatachannel=null,l.prototype._dispatchEvent=function(e,t){this._isClosed||(this.dispatchEvent(t),"function"==typeof this["on"+e]&&this["on"+e](t))},l.prototype._emitGatheringStateChange=function(){var e=new Event("icegatheringstatechange");this._dispatchEvent("icegatheringstatechange",e)},l.prototype.getConfiguration=function(){return this._config},l.prototype.getLocalStreams=function(){return this.localStreams},l.prototype.getRemoteStreams=function(){return this.remoteStreams},l.prototype._createTransceiver=function(e,t){var n=this.transceivers.length>0,r={track:null,iceGatherer:null,iceTransport:null,dtlsTransport:null,localCapabilities:null,remoteCapabilities:null,rtpSender:null,rtpReceiver:null,kind:e,mid:null,sendEncodingParameters:null,recvEncodingParameters:null,stream:null,associatedRemoteMediaStreams:[],wantReceive:!0};if(this.usingBundle&&n)r.iceTransport=this.transceivers[0].iceTransport,r.dtlsTransport=this.transceivers[0].dtlsTransport;else{var i=this._createIceAndDtlsTransports();r.iceTransport=i.iceTransport,r.dtlsTransport=i.dtlsTransport}return t||this.transceivers.push(r),r},l.prototype.addTrack=function(t,n){if(this._isClosed)throw c("InvalidStateError","Attempted to call addTrack on a closed peerconnection.");var r;if(this.transceivers.find((function(e){return e.track===t})))throw c("InvalidAccessError","Track already exists.");for(var i=0;i<this.transceivers.length;i++)this.transceivers[i].track||this.transceivers[i].kind!==t.kind||(r=this.transceivers[i]);return r||(r=this._createTransceiver(t.kind)),this._maybeFireNegotiationNeeded(),-1===this.localStreams.indexOf(n)&&this.localStreams.push(n),r.track=t,r.stream=n,r.rtpSender=new e.RTCRtpSender(t,r.dtlsTransport),r.rtpSender},l.prototype.addStream=function(e){var n=this;if(t>=15025)e.getTracks().forEach((function(t){n.addTrack(t,e)}));else{var r=e.clone();e.getTracks().forEach((function(e,t){var n=r.getTracks()[t];e.addEventListener("enabled",(function(e){n.enabled=e.enabled}))})),r.getTracks().forEach((function(e){n.addTrack(e,r)}))}},l.prototype.removeTrack=function(t){if(this._isClosed)throw c("InvalidStateError","Attempted to call removeTrack on a closed peerconnection.");if(!(t instanceof e.RTCRtpSender))throw new TypeError("Argument 1 of RTCPeerConnection.removeTrack does not implement interface RTCRtpSender.");var n=this.transceivers.find((function(e){return e.rtpSender===t}));if(!n)throw c("InvalidAccessError","Sender was not created by this connection.");var r=n.stream;n.rtpSender.stop(),n.rtpSender=null,n.track=null,n.stream=null,-1===this.transceivers.map((function(e){return e.stream})).indexOf(r)&&this.localStreams.indexOf(r)>-1&&this.localStreams.splice(this.localStreams.indexOf(r),1),this._maybeFireNegotiationNeeded()},l.prototype.removeStream=function(e){var t=this;e.getTracks().forEach((function(e){var n=t.getSenders().find((function(t){return t.track===e}));n&&t.removeTrack(n)}))},l.prototype.getSenders=function(){return this.transceivers.filter((function(e){return!!e.rtpSender})).map((function(e){return e.rtpSender}))},l.prototype.getReceivers=function(){return this.transceivers.filter((function(e){return!!e.rtpReceiver})).map((function(e){return e.rtpReceiver}))},l.prototype._createIceGatherer=function(t,n){var r=this;if(n&&t>0)return this.transceivers[0].iceGatherer;if(this._iceGatherers.length)return this._iceGatherers.shift();var i=new e.RTCIceGatherer({iceServers:this._config.iceServers,gatherPolicy:this._config.iceTransportPolicy});return Object.defineProperty(i,"state",{value:"new",writable:!0}),this.transceivers[t].bufferedCandidateEvents=[],this.transceivers[t].bufferCandidates=function(e){var n=!e.candidate||0===Object.keys(e.candidate).length;i.state=n?"completed":"gathering",null!==r.transceivers[t].bufferedCandidateEvents&&r.transceivers[t].bufferedCandidateEvents.push(e)},i.addEventListener("localcandidate",this.transceivers[t].bufferCandidates),i},l.prototype._gather=function(t,n){var i=this,o=this.transceivers[n].iceGatherer;if(!o.onlocalcandidate){var s=this.transceivers[n].bufferedCandidateEvents;this.transceivers[n].bufferedCandidateEvents=null,o.removeEventListener("localcandidate",this.transceivers[n].bufferCandidates),o.onlocalcandidate=function(e){if(!(i.usingBundle&&n>0)){var s=new Event("icecandidate");s.candidate={sdpMid:t,sdpMLineIndex:n};var a=e.candidate,c=!a||0===Object.keys(a).length;if(c)"new"!==o.state&&"gathering"!==o.state||(o.state="completed");else{"new"===o.state&&(o.state="gathering"),a.component=1,a.ufrag=o.getLocalParameters().usernameFragment;var d=r.writeCandidate(a);s.candidate=Object.assign(s.candidate,r.parseCandidate(d)),s.candidate.candidate=d,s.candidate.toJSON=function(){return{candidate:s.candidate.candidate,sdpMid:s.candidate.sdpMid,sdpMLineIndex:s.candidate.sdpMLineIndex,usernameFragment:s.candidate.usernameFragment}}}var l=r.getMediaSections(i._localDescription.sdp);l[s.candidate.sdpMLineIndex]+=c?"a=end-of-candidates\r\n":"a="+s.candidate.candidate+"\r\n",i._localDescription.sdp=r.getDescription(i._localDescription.sdp)+l.join("");var p=i.transceivers.every((function(e){return e.iceGatherer&&"completed"===e.iceGatherer.state}));"gathering"!==i.iceGatheringState&&(i.iceGatheringState="gathering",i._emitGatheringStateChange()),c||i._dispatchEvent("icecandidate",s),p&&(i._dispatchEvent("icecandidate",new Event("icecandidate")),i.iceGatheringState="complete",i._emitGatheringStateChange())}},e.setTimeout((function(){s.forEach((function(e){o.onlocalcandidate(e)}))}),0)}},l.prototype._createIceAndDtlsTransports=function(){var t=this,n=new e.RTCIceTransport(null);n.onicestatechange=function(){t._updateIceConnectionState(),t._updateConnectionState()};var r=new e.RTCDtlsTransport(n);return r.ondtlsstatechange=function(){t._updateConnectionState()},r.onerror=function(){Object.defineProperty(r,"state",{value:"failed",writable:!0}),t._updateConnectionState()},{iceTransport:n,dtlsTransport:r}},l.prototype._disposeIceAndDtlsTransports=function(e){var t=this.transceivers[e].iceGatherer;t&&(delete t.onlocalcandidate,delete this.transceivers[e].iceGatherer);var n=this.transceivers[e].iceTransport;n&&(delete n.onicestatechange,delete this.transceivers[e].iceTransport);var r=this.transceivers[e].dtlsTransport;r&&(delete r.ondtlsstatechange,delete r.onerror,delete this.transceivers[e].dtlsTransport)},l.prototype._transceive=function(e,n,i){var s=o(e.localCapabilities,e.remoteCapabilities);n&&e.rtpSender&&(s.encodings=e.sendEncodingParameters,s.rtcp={cname:r.localCName,compound:e.rtcpParameters.compound},e.recvEncodingParameters.length&&(s.rtcp.ssrc=e.recvEncodingParameters[0].ssrc),e.rtpSender.send(s)),i&&e.rtpReceiver&&s.codecs.length>0&&("video"===e.kind&&e.recvEncodingParameters&&t<15019&&e.recvEncodingParameters.forEach((function(e){delete e.rtx})),e.recvEncodingParameters.length?s.encodings=e.recvEncodingParameters:s.encodings=[{}],s.rtcp={compound:e.rtcpParameters.compound},e.rtcpParameters.cname&&(s.rtcp.cname=e.rtcpParameters.cname),e.sendEncodingParameters.length&&(s.rtcp.ssrc=e.sendEncodingParameters[0].ssrc),e.rtpReceiver.receive(s))},l.prototype.setLocalDescription=function(e){var t,n,i=this;if(-1===["offer","answer"].indexOf(e.type))return Promise.reject(c("TypeError",'Unsupported type "'+e.type+'"'));if(!s("setLocalDescription",e.type,i.signalingState)||i._isClosed)return Promise.reject(c("InvalidStateError","Can not set local "+e.type+" in state "+i.signalingState));if("offer"===e.type)t=r.splitSections(e.sdp),n=t.shift(),t.forEach((function(e,t){var n=r.parseRtpParameters(e);i.transceivers[t].localCapabilities=n})),i.transceivers.forEach((function(e,t){i._gather(e.mid,t)}));else if("answer"===e.type){t=r.splitSections(i._remoteDescription.sdp),n=t.shift();var a=r.matchPrefix(n,"a=ice-lite").length>0;t.forEach((function(e,t){var s=i.transceivers[t],c=s.iceGatherer,d=s.iceTransport,l=s.dtlsTransport,p=s.localCapabilities,u=s.remoteCapabilities;if(!(r.isRejected(e)&&0===r.matchPrefix(e,"a=bundle-only").length)&&!s.rejected){var h=r.getIceParameters(e,n),f=r.getDtlsParameters(e,n);a&&(f.role="server"),i.usingBundle&&0!==t||(i._gather(s.mid,t),"new"===d.state&&d.start(c,h,a?"controlling":"controlled"),"new"===l.state&&l.start(f));var m=o(p,u);i._transceive(s,m.codecs.length>0,!1)}}))}return i._localDescription={type:e.type,sdp:e.sdp},"offer"===e.type?i._updateSignalingState("have-local-offer"):i._updateSignalingState("stable"),Promise.resolve()},l.prototype.setRemoteDescription=function(i){var l=this;if(-1===["offer","answer"].indexOf(i.type))return Promise.reject(c("TypeError",'Unsupported type "'+i.type+'"'));if(!s("setRemoteDescription",i.type,l.signalingState)||l._isClosed)return Promise.reject(c("InvalidStateError","Can not set remote "+i.type+" in state "+l.signalingState));var p={};l.remoteStreams.forEach((function(e){p[e.id]=e}));var u=[],h=r.splitSections(i.sdp),f=h.shift(),m=r.matchPrefix(f,"a=ice-lite").length>0,v=r.matchPrefix(f,"a=group:BUNDLE ").length>0;l.usingBundle=v;var g=r.matchPrefix(f,"a=ice-options:")[0];return l.canTrickleIceCandidates=!!g&&g.substr(14).split(" ").indexOf("trickle")>=0,h.forEach((function(s,c){var d=r.splitLines(s),h=r.getKind(s),g=r.isRejected(s)&&0===r.matchPrefix(s,"a=bundle-only").length,y=d[0].substr(2).split(" ")[2],_=r.getDirection(s,f),C=r.parseMsid(s),S=r.getMid(s)||r.generateIdentifier();if(g||"application"===h&&("DTLS/SCTP"===y||"UDP/DTLS/SCTP"===y))l.transceivers[c]={mid:S,kind:h,protocol:y,rejected:!0};else{var T,b,R,P,E,k,w,O,D;!g&&l.transceivers[c]&&l.transceivers[c].rejected&&(l.transceivers[c]=l._createTransceiver(h,!0));var I,M,x=r.parseRtpParameters(s);g||(I=r.getIceParameters(s,f),(M=r.getDtlsParameters(s,f)).role="client"),w=r.parseRtpEncodingParameters(s);var j=r.parseRtcpParameters(s),L=r.matchPrefix(s,"a=end-of-candidates",f).length>0,N=r.matchPrefix(s,"a=candidate:").map((function(e){return r.parseCandidate(e)})).filter((function(e){return 1===e.component}));if(("offer"===i.type||"answer"===i.type)&&!g&&v&&c>0&&l.transceivers[c]&&(l._disposeIceAndDtlsTransports(c),l.transceivers[c].iceGatherer=l.transceivers[0].iceGatherer,l.transceivers[c].iceTransport=l.transceivers[0].iceTransport,l.transceivers[c].dtlsTransport=l.transceivers[0].dtlsTransport,l.transceivers[c].rtpSender&&l.transceivers[c].rtpSender.setTransport(l.transceivers[0].dtlsTransport),l.transceivers[c].rtpReceiver&&l.transceivers[c].rtpReceiver.setTransport(l.transceivers[0].dtlsTransport)),"offer"!==i.type||g){if("answer"===i.type&&!g){b=(T=l.transceivers[c]).iceGatherer,R=T.iceTransport,P=T.dtlsTransport,E=T.rtpReceiver,k=T.sendEncodingParameters,O=T.localCapabilities,l.transceivers[c].recvEncodingParameters=w,l.transceivers[c].remoteCapabilities=x,l.transceivers[c].rtcpParameters=j,N.length&&"new"===R.state&&(!m&&!L||v&&0!==c?N.forEach((function(e){a(T.iceTransport,e)})):R.setRemoteCandidates(N)),v&&0!==c||("new"===R.state&&R.start(b,I,"controlling"),"new"===P.state&&P.start(M)),!o(T.localCapabilities,T.remoteCapabilities).codecs.filter((function(e){return"rtx"===e.name.toLowerCase()})).length&&T.sendEncodingParameters[0].rtx&&delete T.sendEncodingParameters[0].rtx,l._transceive(T,"sendrecv"===_||"recvonly"===_,"sendrecv"===_||"sendonly"===_),!E||"sendrecv"!==_&&"sendonly"!==_?delete T.rtpReceiver:(D=E.track,C?(p[C.stream]||(p[C.stream]=new e.MediaStream),n(D,p[C.stream]),u.push([D,E,p[C.stream]])):(p.default||(p.default=new e.MediaStream),n(D,p.default),u.push([D,E,p.default])))}}else{(T=l.transceivers[c]||l._createTransceiver(h)).mid=S,T.iceGatherer||(T.iceGatherer=l._createIceGatherer(c,v)),N.length&&"new"===T.iceTransport.state&&(!L||v&&0!==c?N.forEach((function(e){a(T.iceTransport,e)})):T.iceTransport.setRemoteCandidates(N)),O=e.RTCRtpReceiver.getCapabilities(h),t<15019&&(O.codecs=O.codecs.filter((function(e){return"rtx"!==e.name}))),k=T.sendEncodingParameters||[{ssrc:1001*(2*c+2)}];var A,U=!1;if("sendrecv"===_||"sendonly"===_){if(U=!T.rtpReceiver,E=T.rtpReceiver||new e.RTCRtpReceiver(T.dtlsTransport,h),U)D=E.track,C&&"-"===C.stream||(C?(p[C.stream]||(p[C.stream]=new e.MediaStream,Object.defineProperty(p[C.stream],"id",{get:function(){return C.stream}})),Object.defineProperty(D,"id",{get:function(){return C.track}}),A=p[C.stream]):(p.default||(p.default=new e.MediaStream),A=p.default)),A&&(n(D,A),T.associatedRemoteMediaStreams.push(A)),u.push([D,E,A])}else T.rtpReceiver&&T.rtpReceiver.track&&(T.associatedRemoteMediaStreams.forEach((function(t){var n=t.getTracks().find((function(e){return e.id===T.rtpReceiver.track.id}));n&&function(t,n){n.removeTrack(t),n.dispatchEvent(new e.MediaStreamTrackEvent("removetrack",{track:t}))}(n,t)})),T.associatedRemoteMediaStreams=[]);T.localCapabilities=O,T.remoteCapabilities=x,T.rtpReceiver=E,T.rtcpParameters=j,T.sendEncodingParameters=k,T.recvEncodingParameters=w,l._transceive(l.transceivers[c],!1,U)}}})),void 0===l._dtlsRole&&(l._dtlsRole="offer"===i.type?"active":"passive"),l._remoteDescription={type:i.type,sdp:i.sdp},"offer"===i.type?l._updateSignalingState("have-remote-offer"):l._updateSignalingState("stable"),Object.keys(p).forEach((function(t){var n=p[t];if(n.getTracks().length){if(-1===l.remoteStreams.indexOf(n)){l.remoteStreams.push(n);var r=new Event("addstream");r.stream=n,e.setTimeout((function(){l._dispatchEvent("addstream",r)}))}u.forEach((function(e){var t=e[0],r=e[1];n.id===e[2].id&&d(l,t,r,[n])}))}})),u.forEach((function(e){e[2]||d(l,e[0],e[1],[])})),e.setTimeout((function(){l&&l.transceivers&&l.transceivers.forEach((function(e){e.iceTransport&&"new"===e.iceTransport.state&&e.iceTransport.getRemoteCandidates().length>0&&(console.warn("Timeout for addRemoteCandidate. Consider sending an end-of-candidates notification"),e.iceTransport.addRemoteCandidate({}))}))}),4e3),Promise.resolve()},l.prototype.close=function(){this.transceivers.forEach((function(e){e.iceTransport&&e.iceTransport.stop(),e.dtlsTransport&&e.dtlsTransport.stop(),e.rtpSender&&e.rtpSender.stop(),e.rtpReceiver&&e.rtpReceiver.stop()})),this._isClosed=!0,this._updateSignalingState("closed")},l.prototype._updateSignalingState=function(e){this.signalingState=e;var t=new Event("signalingstatechange");this._dispatchEvent("signalingstatechange",t)},l.prototype._maybeFireNegotiationNeeded=function(){var t=this;"stable"===this.signalingState&&!0!==this.needNegotiation&&(this.needNegotiation=!0,e.setTimeout((function(){if(t.needNegotiation){t.needNegotiation=!1;var e=new Event("negotiationneeded");t._dispatchEvent("negotiationneeded",e)}}),0))},l.prototype._updateIceConnectionState=function(){var e,t={new:0,closed:0,checking:0,connected:0,completed:0,disconnected:0,failed:0};if(this.transceivers.forEach((function(e){e.iceTransport&&!e.rejected&&t[e.iceTransport.state]++})),e="new",t.failed>0?e="failed":t.checking>0?e="checking":t.disconnected>0?e="disconnected":t.new>0?e="new":t.connected>0?e="connected":t.completed>0&&(e="completed"),e!==this.iceConnectionState){this.iceConnectionState=e;var n=new Event("iceconnectionstatechange");this._dispatchEvent("iceconnectionstatechange",n)}},l.prototype._updateConnectionState=function(){var e,t={new:0,closed:0,connecting:0,connected:0,completed:0,disconnected:0,failed:0};if(this.transceivers.forEach((function(e){e.iceTransport&&e.dtlsTransport&&!e.rejected&&(t[e.iceTransport.state]++,t[e.dtlsTransport.state]++)})),t.connected+=t.completed,e="new",t.failed>0?e="failed":t.connecting>0?e="connecting":t.disconnected>0?e="disconnected":t.new>0?e="new":t.connected>0&&(e="connected"),e!==this.connectionState){this.connectionState=e;var n=new Event("connectionstatechange");this._dispatchEvent("connectionstatechange",n)}},l.prototype.createOffer=function(){var n=this;if(n._isClosed)return Promise.reject(c("InvalidStateError","Can not call createOffer after close"));var o=n.transceivers.filter((function(e){return"audio"===e.kind})).length,s=n.transceivers.filter((function(e){return"video"===e.kind})).length,a=arguments[0];if(a){if(a.mandatory||a.optional)throw new TypeError("Legacy mandatory/optional constraints not supported.");void 0!==a.offerToReceiveAudio&&(o=!0===a.offerToReceiveAudio?1:!1===a.offerToReceiveAudio?0:a.offerToReceiveAudio),void 0!==a.offerToReceiveVideo&&(s=!0===a.offerToReceiveVideo?1:!1===a.offerToReceiveVideo?0:a.offerToReceiveVideo)}for(n.transceivers.forEach((function(e){"audio"===e.kind?--o<0&&(e.wantReceive=!1):"video"===e.kind&&--s<0&&(e.wantReceive=!1)}));o>0||s>0;)o>0&&(n._createTransceiver("audio"),o--),s>0&&(n._createTransceiver("video"),s--);var d=r.writeSessionBoilerplate(n._sdpSessionId,n._sdpSessionVersion++);n.transceivers.forEach((function(i,o){var s=i.track,a=i.kind,c=i.mid||r.generateIdentifier();i.mid=c,i.iceGatherer||(i.iceGatherer=n._createIceGatherer(o,n.usingBundle));var d=e.RTCRtpSender.getCapabilities(a);t<15019&&(d.codecs=d.codecs.filter((function(e){return"rtx"!==e.name}))),d.codecs.forEach((function(e){"H264"===e.name&&void 0===e.parameters["level-asymmetry-allowed"]&&(e.parameters["level-asymmetry-allowed"]="1"),i.remoteCapabilities&&i.remoteCapabilities.codecs&&i.remoteCapabilities.codecs.forEach((function(t){e.name.toLowerCase()===t.name.toLowerCase()&&e.clockRate===t.clockRate&&(e.preferredPayloadType=t.payloadType)}))})),d.headerExtensions.forEach((function(e){(i.remoteCapabilities&&i.remoteCapabilities.headerExtensions||[]).forEach((function(t){e.uri===t.uri&&(e.id=t.id)}))}));var l=i.sendEncodingParameters||[{ssrc:1001*(2*o+1)}];s&&t>=15019&&"video"===a&&!l[0].rtx&&(l[0].rtx={ssrc:l[0].ssrc+1}),i.wantReceive&&(i.rtpReceiver=new e.RTCRtpReceiver(i.dtlsTransport,a)),i.localCapabilities=d,i.sendEncodingParameters=l})),"max-compat"!==n._config.bundlePolicy&&(d+="a=group:BUNDLE "+n.transceivers.map((function(e){return e.mid})).join(" ")+"\r\n"),d+="a=ice-options:trickle\r\n",n.transceivers.forEach((function(e,t){d+=i(e,e.localCapabilities,"offer",e.stream,n._dtlsRole),d+="a=rtcp-rsize\r\n",!e.iceGatherer||"new"===n.iceGatheringState||0!==t&&n.usingBundle||(e.iceGatherer.getLocalCandidates().forEach((function(e){e.component=1,d+="a="+r.writeCandidate(e)+"\r\n"})),"completed"===e.iceGatherer.state&&(d+="a=end-of-candidates\r\n"))}));var l=new e.RTCSessionDescription({type:"offer",sdp:d});return Promise.resolve(l)},l.prototype.createAnswer=function(){var n=this;if(n._isClosed)return Promise.reject(c("InvalidStateError","Can not call createAnswer after close"));if("have-remote-offer"!==n.signalingState&&"have-local-pranswer"!==n.signalingState)return Promise.reject(c("InvalidStateError","Can not call createAnswer in signalingState "+n.signalingState));var s=r.writeSessionBoilerplate(n._sdpSessionId,n._sdpSessionVersion++);n.usingBundle&&(s+="a=group:BUNDLE "+n.transceivers.map((function(e){return e.mid})).join(" ")+"\r\n"),s+="a=ice-options:trickle\r\n";var a=r.getMediaSections(n._remoteDescription.sdp).length;n.transceivers.forEach((function(e,r){if(!(r+1>a)){if(e.rejected)return"application"===e.kind?"DTLS/SCTP"===e.protocol?s+="m=application 0 DTLS/SCTP 5000\r\n":s+="m=application 0 "+e.protocol+" webrtc-datachannel\r\n":"audio"===e.kind?s+="m=audio 0 UDP/TLS/RTP/SAVPF 0\r\na=rtpmap:0 PCMU/8000\r\n":"video"===e.kind&&(s+="m=video 0 UDP/TLS/RTP/SAVPF 120\r\na=rtpmap:120 VP8/90000\r\n"),void(s+="c=IN IP4 0.0.0.0\r\na=inactive\r\na=mid:"+e.mid+"\r\n");var c;if(e.stream)"audio"===e.kind?c=e.stream.getAudioTracks()[0]:"video"===e.kind&&(c=e.stream.getVideoTracks()[0]),c&&t>=15019&&"video"===e.kind&&!e.sendEncodingParameters[0].rtx&&(e.sendEncodingParameters[0].rtx={ssrc:e.sendEncodingParameters[0].ssrc+1});var d=o(e.localCapabilities,e.remoteCapabilities);!d.codecs.filter((function(e){return"rtx"===e.name.toLowerCase()})).length&&e.sendEncodingParameters[0].rtx&&delete e.sendEncodingParameters[0].rtx,s+=i(e,d,"answer",e.stream,n._dtlsRole),e.rtcpParameters&&e.rtcpParameters.reducedSize&&(s+="a=rtcp-rsize\r\n")}}));var d=new e.RTCSessionDescription({type:"answer",sdp:s});return Promise.resolve(d)},l.prototype.addIceCandidate=function(e){var t,n=this;return e&&void 0===e.sdpMLineIndex&&!e.sdpMid?Promise.reject(new TypeError("sdpMLineIndex or sdpMid required")):new Promise((function(i,o){if(!n._remoteDescription)return o(c("InvalidStateError","Can not add ICE candidate without a remote description"));if(e&&""!==e.candidate){var s=e.sdpMLineIndex;if(e.sdpMid)for(var d=0;d<n.transceivers.length;d++)if(n.transceivers[d].mid===e.sdpMid){s=d;break}var l=n.transceivers[s];if(!l)return o(c("OperationError","Can not add ICE candidate"));if(l.rejected)return i();var p=Object.keys(e.candidate).length>0?r.parseCandidate(e.candidate):{};if("tcp"===p.protocol&&(0===p.port||9===p.port))return i();if(p.component&&1!==p.component)return i();if((0===s||s>0&&l.iceTransport!==n.transceivers[0].iceTransport)&&!a(l.iceTransport,p))return o(c("OperationError","Can not add ICE candidate"));var u=e.candidate.trim();0===u.indexOf("a=")&&(u=u.substr(2)),(t=r.getMediaSections(n._remoteDescription.sdp))[s]+="a="+(p.type?u:"end-of-candidates")+"\r\n",n._remoteDescription.sdp=r.getDescription(n._remoteDescription.sdp)+t.join("")}else for(var h=0;h<n.transceivers.length&&(n.transceivers[h].rejected||(n.transceivers[h].iceTransport.addRemoteCandidate({}),(t=r.getMediaSections(n._remoteDescription.sdp))[h]+="a=end-of-candidates\r\n",n._remoteDescription.sdp=r.getDescription(n._remoteDescription.sdp)+t.join(""),!n.usingBundle));h++);i()}))},l.prototype.getStats=function(t){if(t&&t instanceof e.MediaStreamTrack){var n=null;if(this.transceivers.forEach((function(e){e.rtpSender&&e.rtpSender.track===t?n=e.rtpSender:e.rtpReceiver&&e.rtpReceiver.track===t&&(n=e.rtpReceiver)})),!n)throw c("InvalidAccessError","Invalid selector.");return n.getStats()}var r=[];return this.transceivers.forEach((function(e){["rtpSender","rtpReceiver","iceGatherer","iceTransport","dtlsTransport"].forEach((function(t){e[t]&&r.push(e[t].getStats())}))})),Promise.all(r).then((function(e){var t=new Map;return e.forEach((function(e){e.forEach((function(e){t.set(e.id,e)}))})),t}))};["RTCRtpSender","RTCRtpReceiver","RTCIceGatherer","RTCIceTransport","RTCDtlsTransport"].forEach((function(t){var n=e[t];if(n&&n.prototype&&n.prototype.getStats){var r=n.prototype.getStats;n.prototype.getStats=function(){return r.apply(this).then((function(e){var t=new Map;return Object.keys(e).forEach((function(n){var r;e[n].type={inboundrtp:"inbound-rtp",outboundrtp:"outbound-rtp",candidatepair:"candidate-pair",localcandidate:"local-candidate",remotecandidate:"remote-candidate"}[(r=e[n]).type]||r.type,t.set(n,e[n])})),t}))}}}));var p=["createOffer","createAnswer"];return p.forEach((function(e){var t=l.prototype[e];l.prototype[e]=function(){var e=arguments;return"function"==typeof e[0]||"function"==typeof e[1]?t.apply(this,[arguments[2]]).then((function(t){"function"==typeof e[0]&&e[0].apply(null,[t])}),(function(t){"function"==typeof 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