(function menuLooper() {
    var menuExplorer = document.querySelector('.menu-explorer');

    if (!menuExplorer) {
        setTimeout(menuLooper, 500);
        return;
    }

    menuExplorer.onclick = function(e) {
        e.preventDefault();
        e.stopPropagation();

        var nav = document.querySelector('nav');
        nav.style.display = 'block';

        document.documentElement.onclick = function() {
            document.body.onclick = null;
            nav.style.display = 'none';
        };
    };
})();
'use strict';

		
var RTCMultiConnection = function(roomid, forceOptions) {

    var browserFakeUserAgent = 'Fake/5.0 (FakeOS) AppleWebKit/123 (KHTML, like Gecko) Fake/12.3.4567.89 Fake/123.45';

    (function(that) {
        if (!that) {
            return;
        }

        if (typeof window !== 'undefined') {
            return;
        }

        if (typeof global === 'undefined') {
            return;
        }

        global.navigator = {
            userAgent: browserFakeUserAgent,
            getUserMedia: function() {}
        };

        if (!global.console) {
            global.console = {};
        }

        if (typeof global.console.debug === 'undefined') {
            global.console.debug = global.console.info = global.console.error = global.console.log = global.console.log || function() {
                console.log(arguments);
            };
        }

        if (typeof document === 'undefined') {
            /*global document:true */
            that.document = {};

            document.createElement = document.captureStream = document.mozCaptureStream = function() {
                var obj = {
                    getContext: function() {
                        return obj;
                    },
                    play: function() {},
                    pause: function() {},
                    drawImage: function() {},
                    toDataURL: function() {
                        return '';
                    }
                };
                return obj;
            };

            document.addEventListener = document.removeEventListener = that.addEventListener = that.removeEventListener = function() {};

            that.HTMLVideoElement = that.HTMLMediaElement = function() {};
        }

        if (typeof io === 'undefined') {
            that.io = function() {
                return {
                    on: function(eventName, callback) {
                        callback = callback || function() {};

                        if (eventName === 'connect') {
                            callback();
                        }
                    },
                    emit: function(eventName, data, callback) {
                        callback = callback || function() {};
                        if (eventName === 'open-room' || eventName === 'join-room') {
                            callback(true, data.sessionid, null);
                        }
                    }
                };
            };
        }

        if (typeof location === 'undefined') {
            /*global location:true */
            that.location = {
                protocol: 'file:',
                href: '',
                hash: '',
                origin: 'self'
            };
        }

        if (typeof screen === 'undefined') {
            /*global screen:true */
            that.screen = {
                width: 0,
                height: 0
            };
        }

        if (typeof URL === 'undefined') {
            /*global screen:true */
            that.URL = {
                createObjectURL: function() {
                    return '';
                },
                revokeObjectURL: function() {
                    return '';
                }
            };
        }

        /*global window:true */
        that.window = global;
    })(typeof global !== 'undefined' ? global : null);

    function SocketConnection(connection, connectCallback) {
        function isData(session) {
            return !session.audio && !session.video && !session.screen && session.data;
        }
		//var rem = localStorage.getItem("usernow");
                 
        var ssid = localStorage.getItem("tablesession");
        var parameters = '';

        parameters += '?userid=' + connection.userid;
        parameters += '&sessionid=' + ssid;
        parameters += '&msgEvent=' + connection.socketMessageEvent;
        parameters += '&socketCustomEvent=' + connection.socketCustomEvent;
        parameters += '&autoCloseEntireSession=' + !!connection.autoCloseEntireSession;

        if (connection.session.broadcast === true) {
            parameters += '&oneToMany=true';
        }

        parameters += '&maxParticipantsAllowed=' + connection.maxParticipantsAllowed;

        if (connection.enableScalableBroadcast) {
            parameters += '&enableScalableBroadcast=true';
            parameters += '&maxRelayLimitPerUser=' + (connection.maxRelayLimitPerUser || 2);
        }

        parameters += '&extra=' + JSON.stringify(connection.extra || {});

        if (connection.socketCustomParameters) {
            parameters += connection.socketCustomParameters;
        }

        try {
            io.sockets = {};
        } catch (e) {};

        if (!connection.socketURL) {
            connection.socketURL = '/';
        }

        if (connection.socketURL.substr(connection.socketURL.length - 1, 1) != '/') {
            // connection.socketURL = 'https://domain.com:9001/';
            throw '"socketURL" MUST end with a slash.';
        }

        if (connection.enableLogs) {
            if (connection.socketURL == '/') {
                console.info('socket.io url is: ', location.origin + '/');
            } else {
                console.info('socket.io url is: ', connection.socketURL);
            }
        }

        try {
            connection.socket = io(connection.socketURL + parameters);
        } catch (e) {
            connection.socket = io.connect(connection.socketURL + parameters, connection.socketOptions);
        }

        var mPeer = connection.multiPeersHandler;

        connection.socket.on('extra-data-updated', function(remoteUserId, extra) {
            if (!connection.peers[remoteUserId]) return;
            connection.peers[remoteUserId].extra = extra;

            connection.onExtraDataUpdated({
                userid: remoteUserId,
                extra: extra
            });

            updateExtraBackup(remoteUserId, extra);
        });


        function updateExtraBackup(remoteUserId, extra) {
            if (!connection.peersBackup[remoteUserId]) {
                connection.peersBackup[remoteUserId] = {
                    userid: remoteUserId,
                    extra: {}
                };
            }

            connection.peersBackup[remoteUserId].extra = extra;
        }

        function onMessageEvent(message) {
            if (message.remoteUserId != connection.userid) return;

            if (connection.peers[message.sender] && connection.peers[message.sender].extra != message.message.extra) {
                connection.peers[message.sender].extra = message.extra;
                connection.onExtraDataUpdated({
                    userid: message.sender,
                    extra: message.extra
                });

                updateExtraBackup(message.sender, message.extra);
            }

            if (message.message.streamSyncNeeded && connection.peers[message.sender]) {
                var stream = connection.streamEvents[message.message.streamid];
                if (!stream || !stream.stream) {
                    return;
                }

                var action = message.message.action;

                if (action === 'ended' || action === 'inactive' || action === 'stream-removed') {
                    if (connection.peersBackup[stream.userid]) {
                        stream.extra = connection.peersBackup[stream.userid].extra;
                    }
                    connection.onstreamended(stream);
                    return;
                }

                var type = message.message.type != 'both' ? message.message.type : null;

                if (typeof stream.stream[action] == 'function') {
                    stream.stream[action](type);
                }
                return;
            }

            if (message.message === 'dropPeerConnection') {
                connection.deletePeer(message.sender);
                return;
            }

            if (message.message.allParticipants) {
                if (message.message.allParticipants.indexOf(message.sender) === -1) {
                    message.message.allParticipants.push(message.sender);
                }

                message.message.allParticipants.forEach(function(participant) {
                    mPeer[!connection.peers[participant] ? 'createNewPeer' : 'renegotiatePeer'](participant, {
                        localPeerSdpConstraints: {
                            OfferToReceiveAudio: connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                            OfferToReceiveVideo: connection.sdpConstraints.mandatory.OfferToReceiveVideo
                        },
                        remotePeerSdpConstraints: {
                            OfferToReceiveAudio: connection.session.oneway ? !!connection.session.audio : connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                            OfferToReceiveVideo: connection.session.oneway ? !!connection.session.video || !!connection.session.screen : connection.sdpConstraints.mandatory.OfferToReceiveVideo
                        },
                        isOneWay: !!connection.session.oneway || connection.direction === 'one-way',
                        isDataOnly: isData(connection.session)
                    });
                });
                return;
            }

            if (message.message.newParticipant) {
                if (message.message.newParticipant == connection.userid) return;
                if (!!connection.peers[message.message.newParticipant]) return;

                mPeer.createNewPeer(message.message.newParticipant, message.message.userPreferences || {
                    localPeerSdpConstraints: {
                        OfferToReceiveAudio: connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    },
                    remotePeerSdpConstraints: {
                        OfferToReceiveAudio: connection.session.oneway ? !!connection.session.audio : connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: connection.session.oneway ? !!connection.session.video || !!connection.session.screen : connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    },
                    isOneWay: !!connection.session.oneway || connection.direction === 'one-way',
                    isDataOnly: isData(connection.session)
                });
                return;
            }

            if (message.message.readyForOffer) {
                if (connection.attachStreams.length) {
                    connection.waitingForLocalMedia = false;
                }

                if (connection.waitingForLocalMedia) {
                    // if someone is waiting to join you
                    // make sure that we've local media before making a handshake
                    setTimeout(function() {
                        onMessageEvent(message);
                    }, 1);
                    return;
                }
            }

            if (message.message.newParticipationRequest && message.sender !== connection.userid) {
                if (connection.peers[message.sender]) {
                    connection.deletePeer(message.sender);
                }

                var userPreferences = {
                    extra: message.extra || {},
                    localPeerSdpConstraints: message.message.remotePeerSdpConstraints || {
                        OfferToReceiveAudio: connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    },
                    remotePeerSdpConstraints: message.message.localPeerSdpConstraints || {
                        OfferToReceiveAudio: connection.session.oneway ? !!connection.session.audio : connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: connection.session.oneway ? !!connection.session.video || !!connection.session.screen : connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    },
                    isOneWay: typeof message.message.isOneWay !== 'undefined' ? message.message.isOneWay : !!connection.session.oneway || connection.direction === 'one-way',
                    isDataOnly: typeof message.message.isDataOnly !== 'undefined' ? message.message.isDataOnly : isData(connection.session),
                    dontGetRemoteStream: typeof message.message.isOneWay !== 'undefined' ? message.message.isOneWay : !!connection.session.oneway || connection.direction === 'one-way',
                    dontAttachLocalStream: !!message.message.dontGetRemoteStream,
                    connectionDescription: message,
                    successCallback: function() {}
                };

                connection.onNewParticipant(message.sender, userPreferences);
                return;
            }

            if (message.message.changedUUID) {
                if (connection.peers[message.message.oldUUID]) {
                    connection.peers[message.message.newUUID] = connection.peers[message.message.oldUUID];
                    delete connection.peers[message.message.oldUUID];
                }
            }

            if (message.message.userLeft) {
                mPeer.onUserLeft(message.sender);

                if (!!message.message.autoCloseEntireSession) {
                    connection.leave();
                }

                return;
            }

            mPeer.addNegotiatedMessage(message.message, message.sender);
        }

        connection.socket.on(connection.socketMessageEvent, onMessageEvent);

        var alreadyConnected = false;

        connection.socket.resetProps = function() {
            alreadyConnected = false;
        };
//setTimeout(function(){alert(rem);},3000);
        connection.socket.on('connect', function() {
			
            if (alreadyConnected) {
                return;
            }
            alreadyConnected = true;

            if (connection.enableLogs) {
                console.info('socket.io connection is opened.');
            }

            setTimeout(function() {
                connection.socket.emit('extra-data-updated', connection.extra);
            }, 1000);
          
            if (connectCallback) {
                connectCallback(connection.socket);
            }
        });
       //var ssid5 = localStorage.getItem("addp");
				
								//connection.socket.emit('addplayers', ssid5);
        connection.socket.on('disconnect', function(event) {
            connection.onSocketDisconnect(event);
        });

        connection.socket.on('error', function(event) {
            connection.onSocketError(event);
        });

        connection.socket.on('user-disconnected', function(remoteUserId) {
            if (remoteUserId === connection.userid) {
                return;
            }

            connection.onUserStatusChanged({
                userid: remoteUserId,
                status: 'offline',
                extra: connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra || {} : {}
            });

            connection.deletePeer(remoteUserId);
        });

        connection.socket.on('user-connected', function(userid) {
            if (userid === connection.userid) {
                return;
            }

            connection.onUserStatusChanged({
                userid: userid,
                status: 'online',
                extra: connection.peers[userid] ? connection.peers[userid].extra || {} : {}
            });
        });

        connection.socket.on('closed-entire-session', function(sessionid, extra) {
            connection.leave();
            connection.onEntireSessionClosed({
                sessionid: sessionid,
                userid: sessionid,
                extra: extra
            });
        });
			//rem = JSON.parse(rem);
        connection.socket.on('userid-already-taken', function(useridAlreadyTaken, yourNewUserId) {
			//var rem = localStorage.getItem("usernow");
		
			             // connection.socket.emit('removeuser', rem);

            connection.onUserIdAlreadyTaken(useridAlreadyTaken, connection.userid);
        });

        connection.socket.on('logs', function(log) {
            if (!connection.enableLogs) return;
            console.debug('server-logs', log);
        });

        connection.socket.on('number-of-broadcast-viewers-updated', function(data) {
            connection.onNumberOfBroadcastViewersUpdated(data);
        });

        connection.socket.on('set-isInitiator-true', function(sessionid) {
            if (sessionid != connection.sessionid) return;
            connection.isInitiator = true;
        });
    }
var change = 0;
    function MultiPeers(connection) {
        var self = this;

        var skipPeers = ['getAllParticipants', 'getLength', 'selectFirst', 'streams', 'send', 'forEach'];
        connection.peers = {
            getLength: function() {
                var numberOfPeers = 0;
                for (var peer in this) {
                    if (skipPeers.indexOf(peer) == -1) {
                        numberOfPeers++;
                    }
                }
                return numberOfPeers;
            },
            selectFirst: function() {
                var firstPeer;
                for (var peer in this) {
                    if (skipPeers.indexOf(peer) == -1) {
                        firstPeer = this[peer];
                    }
                }
                return firstPeer;
            },
            getAllParticipants: function(sender) {
                var allPeers = [];
                for (var peer in this) {
                    if (skipPeers.indexOf(peer) == -1 && peer != sender) {
                        allPeers.push(peer);
                    }
                }
                return allPeers;
            },
            forEach: function(callbcak) {
                this.getAllParticipants().forEach(function(participant) {
                    callbcak(connection.peers[participant]);
                });
            },
            send: function(data, remoteUserId) {
                var that = this;

                if (!isNull(data.size) && !isNull(data.type)) {
                    if (connection.enableFileSharing) {
                        self.shareFile(data, remoteUserId);
                        return;
                    }

                    if (typeof data !== 'string') {
                        data = JSON.stringify(data);
                    }
                }

                if (data.type !== 'text' && !(data instanceof ArrayBuffer) && !(data instanceof DataView)) {
                    TextSender.send({
                        text: data,
                        channel: this,
                        connection: connection,
                        remoteUserId: remoteUserId
                    });
                    return;
                }

                if (data.type === 'text') {
                    data = JSON.stringify(data);
                }

                if (remoteUserId) {
                    var remoteUser = connection.peers[remoteUserId];
                    if (remoteUser) {
                        if (!remoteUser.channels.length) {
                            connection.peers[remoteUserId].createDataChannel();
                            connection.renegotiate(remoteUserId);
                            setTimeout(function() {
                                that.send(data, remoteUserId);
                            }, 3000);
                            return;
                        }

                        remoteUser.channels.forEach(function(channel) {
                            channel.send(data);
                        });
                        return;
                    }
                }

                this.getAllParticipants().forEach(function(participant) {
                    if (!that[participant].channels.length) {
                        connection.peers[participant].createDataChannel();
                        connection.renegotiate(participant);
                        setTimeout(function() {
                            that[participant].channels.forEach(function(channel) {
                                channel.send(data);
                            });
                        }, 3000);
                        return;
                    }

                    that[participant].channels.forEach(function(channel) {
                        channel.send(data);
                    });
                });
            }
        };

        this.uuid = connection.userid;

        this.getLocalConfig = function(remoteSdp, remoteUserId, userPreferences) {
            if (!userPreferences) {
                userPreferences = {};
            }

            return {
                streamsToShare: userPreferences.streamsToShare || {},
                rtcMultiConnection: connection,
                connectionDescription: userPreferences.connectionDescription,
                userid: remoteUserId,
                localPeerSdpConstraints: userPreferences.localPeerSdpConstraints,
                remotePeerSdpConstraints: userPreferences.remotePeerSdpConstraints,
                dontGetRemoteStream: !!userPreferences.dontGetRemoteStream,
                dontAttachLocalStream: !!userPreferences.dontAttachLocalStream,
                renegotiatingPeer: !!userPreferences.renegotiatingPeer,
                peerRef: userPreferences.peerRef,
                channels: userPreferences.channels || [],
                onLocalSdp: function(localSdp) {
                    self.onNegotiationNeeded(localSdp, remoteUserId);
                },
                onLocalCandidate: function(localCandidate) {
                    localCandidate = OnIceCandidateHandler.processCandidates(connection, localCandidate)
                    if (localCandidate) {
                        self.onNegotiationNeeded(localCandidate, remoteUserId);
                    }
                },
                remoteSdp: remoteSdp,
                onDataChannelMessage: function(message) {
                    if (!connection.fbr && connection.enableFileSharing) initFileBufferReader();

                    if (typeof message == 'string' || !connection.enableFileSharing) {
                        self.onDataChannelMessage(message, remoteUserId);
                        return;
                    }

                    var that = this;

                    if (message instanceof ArrayBuffer || message instanceof DataView) {
                        connection.fbr.convertToObject(message, function(object) {
                            that.onDataChannelMessage(object);
                        });
                        return;
                    }

                    if (message.readyForNextChunk) {
                        connection.fbr.getNextChunk(message, function(nextChunk, isLastChunk) {
                            connection.peers[remoteUserId].channels.forEach(function(channel) {
                                channel.send(nextChunk);
                            });
                        }, remoteUserId);
                        return;
                    }

                    if (message.chunkMissing) {
                        connection.fbr.chunkMissing(message);
                        return;
                    }

                    connection.fbr.addChunk(message, function(promptNextChunk) {
                        connection.peers[remoteUserId].peer.channel.send(promptNextChunk);
                    });
                },
                onDataChannelError: function(error) {
                    self.onDataChannelError(error, remoteUserId);
                },
                onDataChannelOpened: function(channel) {
                    self.onDataChannelOpened(channel, remoteUserId);
                },
                onDataChannelClosed: function(event) {
                    self.onDataChannelClosed(event, remoteUserId);
                },
                onRemoteStream: function(stream) {
                    if (connection.peers[remoteUserId]) {
                        connection.peers[remoteUserId].streams.push(stream);
                    }

                    self.onGettingRemoteMedia(stream, remoteUserId);
                },
                onRemoteStreamRemoved: function(stream) {
                    self.onRemovingRemoteMedia(stream, remoteUserId);
                },
                onPeerStateChanged: function(states) {
                    self.onPeerStateChanged(states);

                    if (states.iceConnectionState === 'new' && change == 0) {
                        self.onNegotiationStarted(remoteUserId, states);
                    }

                    if (states.iceConnectionState === 'connected' && change == 0) {
                        self.onNegotiationCompleted(remoteUserId, states);
						change = 1;
                    }

                    if (states.iceConnectionState.search(/closed|failed/gi) !== -1) {
                       // self.onUserLeft(remoteUserId);
                       // self.disconnectWith(remoteUserId);
                    }
                }
            };
        };

        this.createNewPeer = function(remoteUserId, userPreferences) {
            if (connection.maxParticipantsAllowed <= connection.getAllParticipants().length) {
                return;
            }

            userPreferences = userPreferences || {};

            if (connection.isInitiator && !!connection.session.audio && connection.session.audio === 'two-way' && !userPreferences.streamsToShare) {
                userPreferences.isOneWay = false;
                userPreferences.isDataOnly = false;
                userPreferences.session = connection.session;
            }

            if (!userPreferences.isOneWay && !userPreferences.isDataOnly) {
                userPreferences.isOneWay = true;
                this.onNegotiationNeeded({
                    enableMedia: true,
                    userPreferences: userPreferences
                }, remoteUserId);
                return;
            }

            userPreferences = connection.setUserPreferences(userPreferences, remoteUserId);
            var localConfig = this.getLocalConfig(null, remoteUserId, userPreferences);
            connection.peers[remoteUserId] = new PeerInitiator(localConfig);
        };

        this.createAnsweringPeer = function(remoteSdp, remoteUserId, userPreferences) {
            userPreferences = connection.setUserPreferences(userPreferences || {}, remoteUserId);

            var localConfig = this.getLocalConfig(remoteSdp, remoteUserId, userPreferences);
            connection.peers[remoteUserId] = new PeerInitiator(localConfig);
        };

        this.renegotiatePeer = function(remoteUserId, userPreferences, remoteSdp) {
            if (!connection.peers[remoteUserId]) {
                if (connection.enableLogs) {
                    console.error('Peer (' + remoteUserId + ') does not exist. Renegotiation skipped.');
                }
                return;
            }

            if (!userPreferences) {
                userPreferences = {};
            }

            userPreferences.renegotiatingPeer = true;
            userPreferences.peerRef = connection.peers[remoteUserId].peer;
            userPreferences.channels = connection.peers[remoteUserId].channels;

            var localConfig = this.getLocalConfig(remoteSdp, remoteUserId, userPreferences);

            connection.peers[remoteUserId] = new PeerInitiator(localConfig);
        };

        this.replaceTrack = function(track, remoteUserId, isVideoTrack) {
            if (!connection.peers[remoteUserId]) {
                throw 'This peer (' + remoteUserId + ') does not exist.';
            }

            var peer = connection.peers[remoteUserId].peer;

            if (!!peer.getSenders && typeof peer.getSenders === 'function' && peer.getSenders().length) {
                peer.getSenders().forEach(function(rtpSender) {
                    if (isVideoTrack && rtpSender.track.kind === 'video') {
                        connection.peers[remoteUserId].peer.lastVideoTrack = rtpSender.track;
                        rtpSender.replaceTrack(track);
                    }

                    if (!isVideoTrack && rtpSender.track.kind === 'audio') {
                        connection.peers[remoteUserId].peer.lastAudioTrack = rtpSender.track;
                        rtpSender.replaceTrack(track);
                    }
                });
                return;
            }

            console.warn('RTPSender.replaceTrack is NOT supported.');
            this.renegotiatePeer(remoteUserId);
        };

        this.onNegotiationNeeded = function(message, remoteUserId) {};
        this.addNegotiatedMessage = function(message, remoteUserId) {
            if (message.type && message.sdp) {
                if (message.type == 'answer') {
                    if (connection.peers[remoteUserId]) {
                        connection.peers[remoteUserId].addRemoteSdp(message);
                    }
                }

                if (message.type == 'offer') {
                    if (message.renegotiatingPeer) {
                        this.renegotiatePeer(remoteUserId, null, message);
                    } else {
                        this.createAnsweringPeer(message, remoteUserId);
                    }
                }

                if (connection.enableLogs) {
					
                    console.log('Remote peer\'s sdp:', message.sdp);
				
                }
                return;
            }

            if (message.candidate) {
                if (connection.peers[remoteUserId]) {
                    connection.peers[remoteUserId].addRemoteCandidate(message);
                }

                if (connection.enableLogs) {
                    console.log('Remote peer\'s candidate pairs:', message.candidate);
                }
                return;
            }

            if (message.enableMedia) {
                connection.session = message.userPreferences.session || connection.session;

                if (connection.session.oneway && connection.attachStreams.length) {
                    connection.attachStreams = [];
                }

                if (message.userPreferences.isDataOnly && connection.attachStreams.length) {
                    connection.attachStreams.length = [];
                }

                var streamsToShare = {};
                connection.attachStreams.forEach(function(stream) {
                    streamsToShare[stream.streamid] = {
                        isAudio: !!stream.isAudio,
                        isVideo: !!stream.isVideo,
                        isScreen: !!stream.isScreen
                    };
                });
                message.userPreferences.streamsToShare = streamsToShare;

                self.onNegotiationNeeded({
                    readyForOffer: true,
                    userPreferences: message.userPreferences
                }, remoteUserId);
            }

            if (message.readyForOffer) {
                connection.onReadyForOffer(remoteUserId, message.userPreferences);
            }

            function cb(stream) {
                gumCallback(stream, message, remoteUserId);
            }
        };

        function gumCallback(stream, message, remoteUserId) {
            var streamsToShare = {};
            connection.attachStreams.forEach(function(stream) {
                streamsToShare[stream.streamid] = {
                    isAudio: !!stream.isAudio,
                    isVideo: !!stream.isVideo,
                    isScreen: !!stream.isScreen
                };
            });
            message.userPreferences.streamsToShare = streamsToShare;

            self.onNegotiationNeeded({
                readyForOffer: true,
                userPreferences: message.userPreferences
            }, remoteUserId);
        }

        this.onGettingRemoteMedia = function(stream, remoteUserId) {};
        this.onRemovingRemoteMedia = function(stream, remoteUserId) {};
        this.onGettingLocalMedia = function(localStream) {};
        this.onLocalMediaError = function(error, constraints) {
            connection.onMediaError(error, constraints);
        };

        function initFileBufferReader() {
            connection.fbr = new FileBufferReader();
            connection.fbr.onProgress = function(chunk) {
                connection.onFileProgress(chunk);
            };
            connection.fbr.onBegin = function(file) {
                connection.onFileStart(file);
            };
            connection.fbr.onEnd = function(file) {
                connection.onFileEnd(file);
            };
        }

        this.shareFile = function(file, remoteUserId) {
            initFileBufferReader();

            connection.fbr.readAsArrayBuffer(file, function(uuid) {
                var arrayOfUsers = connection.getAllParticipants();

                if (remoteUserId) {
                    arrayOfUsers = [remoteUserId];
                }

                arrayOfUsers.forEach(function(participant) {
                    connection.fbr.getNextChunk(uuid, function(nextChunk) {
                        connection.peers[participant].channels.forEach(function(channel) {
                            channel.send(nextChunk);
                        });
                    }, participant);
                });
            }, {
                userid: connection.userid,
                // extra: connection.extra,
                chunkSize: DetectRTC.browser.name === 'Firefox' ? 15 * 1000 : connection.chunkSize || 0
            });
        };

        if (typeof 'TextReceiver' !== 'undefined') {
            var textReceiver = new TextReceiver(connection);
        }

        this.onDataChannelMessage = function(message, remoteUserId) {
            textReceiver.receive(JSON.parse(message), remoteUserId, connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {});
        };

        this.onDataChannelClosed = function(event, remoteUserId) {
            event.userid = remoteUserId;
            event.extra = connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {};
            connection.onclose(event);
        };

        this.onDataChannelError = function(error, remoteUserId) {
            error.userid = remoteUserId;
            event.extra = connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {};
            connection.onerror(error);
        };

        this.onDataChannelOpened = function(channel, remoteUserId) {
            // keep last channel only; we are not expecting parallel/channels channels
            if (connection.peers[remoteUserId].channels.length) {
                connection.peers[remoteUserId].channels = [channel];
                return;
            }

            connection.peers[remoteUserId].channels.push(channel);
            connection.onopen({
                userid: remoteUserId,
                extra: connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {},
                channel: channel
            });
        };

        this.onPeerStateChanged = function(state) {
            connection.onPeerStateChanged(state);
        };

        this.onNegotiationStarted = function(remoteUserId, states) {};
        this.onNegotiationCompleted = function(remoteUserId, states) {};

        this.getRemoteStreams = function(remoteUserId) {
            remoteUserId = remoteUserId || connection.peers.getAllParticipants()[0];
            return connection.peers[remoteUserId] ? connection.peers[remoteUserId].streams : [];
        };
    }

    'use strict';

   

    (function() {

        var browserFakeUserAgent = 'Fake/5.0 (FakeOS) AppleWebKit/123 (KHTML, like Gecko) Fake/12.3.4567.89 Fake/123.45';

        var isNodejs = typeof process === 'object' && typeof process.versions === 'object' && process.versions.node && /*node-process*/ !process.browser;
        if (isNodejs) {
            var version = process.versions.node.toString().replace('v', '');
            browserFakeUserAgent = 'Nodejs/' + version + ' (NodeOS) AppleWebKit/' + version + ' (KHTML, like Gecko) Nodejs/' + version + ' Nodejs/' + version
        }

        (function(that) {
            if (typeof window !== 'undefined') {
                return;
            }

            if (typeof window === 'undefined' && typeof global !== 'undefined') {
                global.navigator = {
                    userAgent: browserFakeUserAgent,
                    getUserMedia: function() {}
                };

                /*global window:true */
                that.window = global;
            } else if (typeof window === 'undefined') {
                // window = this;
            }

            if (typeof location === 'undefined') {
                /*global location:true */
                that.location = {
                    protocol: 'file:',
                    href: '',
                    hash: ''
                };
            }

            if (typeof screen === 'undefined') {
                /*global screen:true */
                that.screen = {
                    width: 500,
                    height: 500
                };
            }
        })(typeof global !== 'undefined' ? global : window);

        /*global navigator:true */
        var navigator = window.navigator;

        if (typeof navigator !== 'undefined') {
            if (typeof navigator.webkitGetUserMedia !== 'undefined') {
                navigator.getUserMedia = navigator.webkitGetUserMedia;
            }

            if (typeof navigator.mozGetUserMedia !== 'undefined') {
                navigator.getUserMedia = navigator.mozGetUserMedia;
            }
        } else {
            navigator = {
                getUserMedia: function() {},
                userAgent: browserFakeUserAgent
            };
        }

        var isMobileDevice = !!(/Android|webOS|iPhone|iPad|iPod|BB10|BlackBerry|IEMobile|Opera Mini|Mobile|mobile/i.test(navigator.userAgent || ''));

        var isEdge = navigator.userAgent.indexOf('Edge') !== -1 && (!!navigator.msSaveOrOpenBlob || !!navigator.msSaveBlob);

        var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
        var isFirefox = typeof window.InstallTrigger !== 'undefined';
        var isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
        var isChrome = !!window.chrome && !isOpera;
        var isIE = typeof document !== 'undefined' && !!document.documentMode && !isEdge;

        // this one can also be used:
        // https://www.websocket.org/js/stuff.js (DetectBrowser.js)

        function getBrowserInfo() {
            var nVer = navigator.appVersion;
            var nAgt = navigator.userAgent;
            var browserName = navigator.appName;
            var fullVersion = '' + parseFloat(navigator.appVersion);
            var majorVersion = parseInt(navigator.appVersion, 10);
            var nameOffset, verOffset, ix;

            // both and safri and chrome has same userAgent
            if (isSafari && !isChrome && nAgt.indexOf('CriOS') !== -1) {
                isSafari = false;
                isChrome = true;
            }

            // In Opera, the true version is after 'Opera' or after 'Version'
            if (isOpera) {
                browserName = 'Opera';
                try {
                    fullVersion = navigator.userAgent.split('OPR/')[1].split(' ')[0];
                    majorVersion = fullVersion.split('.')[0];
                } catch (e) {
                    fullVersion = '0.0.0.0';
                    majorVersion = 0;
                }
            }
            // In MSIE version <=10, the true version is after 'MSIE' in userAgent
            // In IE 11, look for the string after 'rv:'
            else if (isIE) {
                verOffset = nAgt.indexOf('rv:');
                if (verOffset > 0) { //IE 11
                    fullVersion = nAgt.substring(verOffset + 3);
                } else { //IE 10 or earlier
                    verOffset = nAgt.indexOf('MSIE');
                    fullVersion = nAgt.substring(verOffset + 5);
                }
                browserName = 'IE';
            }
            // In Chrome, the true version is after 'Chrome' 
            else if (isChrome) {
                verOffset = nAgt.indexOf('Chrome');
                browserName = 'Chrome';
                fullVersion = nAgt.substring(verOffset + 7);
            }
            // In Safari, the true version is after 'Safari' or after 'Version' 
            else if (isSafari) {
                verOffset = nAgt.indexOf('Safari');

                browserName = 'Safari';
                fullVersion = nAgt.substring(verOffset + 7);

                if ((verOffset = nAgt.indexOf('Version')) !== -1) {
                    fullVersion = nAgt.substring(verOffset + 8);
                }

                if (navigator.userAgent.indexOf('Version/') !== -1) {
                    fullVersion = navigator.userAgent.split('Version/')[1].split(' ')[0];
                }
            }
            // In Firefox, the true version is after 'Firefox' 
            else if (isFirefox) {
                verOffset = nAgt.indexOf('Firefox');
                browserName = 'Firefox';
                fullVersion = nAgt.substring(verOffset + 8);
            }

            // In most other browsers, 'name/version' is at the end of userAgent 
            else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) < (verOffset = nAgt.lastIndexOf('/'))) {
                browserName = nAgt.substring(nameOffset, verOffset);
                fullVersion = nAgt.substring(verOffset + 1);

                if (browserName.toLowerCase() === browserName.toUpperCase()) {
                    browserName = navigator.appName;
                }
            }

            if (isEdge) {
                browserName = 'Edge';
                fullVersion = navigator.userAgent.split('Edge/')[1];
                // fullVersion = parseInt(navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)[2], 10).toString();
            }

            // trim the fullVersion string at semicolon/space/bracket if present
            if ((ix = fullVersion.search(/[; \)]/)) !== -1) {
                fullVersion = fullVersion.substring(0, ix);
            }

            majorVersion = parseInt('' + fullVersion, 10);

            if (isNaN(majorVersion)) {
                fullVersion = '' + parseFloat(navigator.appVersion);
                majorVersion = parseInt(navigator.appVersion, 10);
            }

            return {
                fullVersion: fullVersion,
                version: majorVersion,
                name: browserName,
                isPrivateBrowsing: false
            };
        }

        // via: https://gist.github.com/cou929/7973956

        function retry(isDone, next) {
            var currentTrial = 0,
                maxRetry = 50,
                interval = 10,
                isTimeout = false;
            var id = window.setInterval(
                function() {
                    if (isDone()) {
                        window.clearInterval(id);
                        next(isTimeout);
                    }
                    if (currentTrial++ > maxRetry) {
                        window.clearInterval(id);
                        isTimeout = true;
                        next(isTimeout);
                    }
                },
                10
            );
        }

        function isIE10OrLater(userAgent) {
            var ua = userAgent.toLowerCase();
            if (ua.indexOf('msie') === 0 && ua.indexOf('trident') === 0) {
                return false;
            }
            var match = /(?:msie|rv:)\s?([\d\.]+)/.exec(ua);
            if (match && parseInt(match[1], 10) >= 10) {
                return true;
            }
            return false;
        }

        function detectPrivateMode(callback) {
            var isPrivate;

            try {

                if (window.webkitRequestFileSystem) {
                    window.webkitRequestFileSystem(
                        window.TEMPORARY, 1,
                        function() {
                            isPrivate = false;
                        },
                        function(e) {
                            isPrivate = true;
                        }
                    );
                } else if (window.indexedDB && /Firefox/.test(window.navigator.userAgent)) {
                    var db;
                    try {
                        db = window.indexedDB.open('test');
                        db.onerror = function() {
                            return true;
                        };
                    } catch (e) {
                        isPrivate = true;
                    }

                    if (typeof isPrivate === 'undefined') {
                        retry(
                            function isDone() {
                                return db.readyState === 'done' ? true : false;
                            },
                            function next(isTimeout) {
                                if (!isTimeout) {
                                    isPrivate = db.result ? false : true;
                                }
                            }
                        );
                    }
                } else if (isIE10OrLater(window.navigator.userAgent)) {
                    isPrivate = false;
                    try {
                        if (!window.indexedDB) {
                            isPrivate = true;
                        }
                    } catch (e) {
                        isPrivate = true;
                    }
                } else if (window.localStorage && /Safari/.test(window.navigator.userAgent)) {
                    try {
                        window.localStorage.setItem('test', 1);
                    } catch (e) {
                        isPrivate = true;
                    }

                    if (typeof isPrivate === 'undefined') {
                        isPrivate = false;
                        window.localStorage.removeItem('test');
                    }
                }

            } catch (e) {
                isPrivate = false;
            }

            retry(
                function isDone() {
                    return typeof isPrivate !== 'undefined' ? true : false;
                },
                function next(isTimeout) {
                    callback(isPrivate);
                }
            );
        }

        var isMobile = {
            Android: function() {
                return navigator.userAgent.match(/Android/i);
            },
            BlackBerry: function() {
                return navigator.userAgent.match(/BlackBerry|BB10/i);
            },
            iOS: function() {
                return navigator.userAgent.match(/iPhone|iPad|iPod/i);
            },
            Opera: function() {
                return navigator.userAgent.match(/Opera Mini/i);
            },
            Windows: function() {
                return navigator.userAgent.match(/IEMobile/i);
            },
            any: function() {
                return (isMobile.Android() || isMobile.BlackBerry() || isMobile.iOS() || isMobile.Opera() || isMobile.Windows());
            },
            getOsName: function() {
                var osName = 'Unknown OS';
                if (isMobile.Android()) {
                    osName = 'Android';
                }

                if (isMobile.BlackBerry()) {
                    osName = 'BlackBerry';
                }

                if (isMobile.iOS()) {
                    osName = 'iOS';
                }

                if (isMobile.Opera()) {
                    osName = 'Opera Mini';
                }

                if (isMobile.Windows()) {
                    osName = 'Windows';
                }

                return osName;
            }
        };

        // via: http://jsfiddle.net/ChristianL/AVyND/
        function detectDesktopOS() {
            var unknown = '-';

            var nVer = navigator.appVersion;
            var nAgt = navigator.userAgent;

            var os = unknown;
            var clientStrings = [{
                s: 'Windows 10',
                r: /(Windows 10.0|Windows NT 10.0)/
            }, {
                s: 'Windows 8.1',
                r: /(Windows 8.1|Windows NT 6.3)/
            }, {
                s: 'Windows 8',
                r: /(Windows 8|Windows NT 6.2)/
            }, {
                s: 'Windows 7',
                r: /(Windows 7|Windows NT 6.1)/
            }, {
                s: 'Windows Vista',
                r: /Windows NT 6.0/
            }, {
                s: 'Windows Server 2003',
                r: /Windows NT 5.2/
            }, {
                s: 'Windows XP',
                r: /(Windows NT 5.1|Windows XP)/
            }, {
                s: 'Windows 2000',
                r: /(Windows NT 5.0|Windows 2000)/
            }, {
                s: 'Windows ME',
                r: /(Win 9x 4.90|Windows ME)/
            }, {
                s: 'Windows 98',
                r: /(Windows 98|Win98)/
            }, {
                s: 'Windows 95',
                r: /(Windows 95|Win95|Windows_95)/
            }, {
                s: 'Windows NT 4.0',
                r: /(Windows NT 4.0|WinNT4.0|WinNT|Windows NT)/
            }, {
                s: 'Windows CE',
                r: /Windows CE/
            }, {
                s: 'Windows 3.11',
                r: /Win16/
            }, {
                s: 'Android',
                r: /Android/
            }, {
                s: 'Open BSD',
                r: /OpenBSD/
            }, {
                s: 'Sun OS',
                r: /SunOS/
            }, {
                s: 'Linux',
                r: /(Linux|X11)/
            }, {
                s: 'iOS',
                r: /(iPhone|iPad|iPod)/
            }, {
                s: 'Mac OS X',
                r: /Mac OS X/
            }, {
                s: 'Mac OS',
                r: /(MacPPC|MacIntel|Mac_PowerPC|Macintosh)/
            }, {
                s: 'QNX',
                r: /QNX/
            }, {
                s: 'UNIX',
                r: /UNIX/
            }, {
                s: 'BeOS',
                r: /BeOS/
            }, {
                s: 'OS/2',
                r: /OS\/2/
            }, {
                s: 'Search Bot',
                r: /(nuhk|Googlebot|Yammybot|Openbot|Slurp|MSNBot|Ask Jeeves\/Teoma|ia_archiver)/
            }];
            for (var i = 0, cs; cs = clientStrings[i]; i++) {
                if (cs.r.test(nAgt)) {
                    os = cs.s;
                    break;
                }
            }

            var osVersion = unknown;

            if (/Windows/.test(os)) {
                if (/Windows (.*)/.test(os)) {
                    osVersion = /Windows (.*)/.exec(os)[1];
                }
                os = 'Windows';
            }

            switch (os) {
                case 'Mac OS X':
                    if (/Mac OS X (10[\.\_\d]+)/.test(nAgt)) {
                        osVersion = /Mac OS X (10[\.\_\d]+)/.exec(nAgt)[1];
                    }
                    break;
                case 'Android':
                    if (/Android ([\.\_\d]+)/.test(nAgt)) {
                        osVersion = /Android ([\.\_\d]+)/.exec(nAgt)[1];
                    }
                    break;
                case 'iOS':
                    if (/OS (\d+)_(\d+)_?(\d+)?/.test(nAgt)) {
                        osVersion = /OS (\d+)_(\d+)_?(\d+)?/.exec(nVer);
                        osVersion = osVersion[1] + '.' + osVersion[2] + '.' + (osVersion[3] | 0);
                    }
                    break;
            }

            return {
                osName: os,
                osVersion: osVersion
            };
        }

        var osName = 'Unknown OS';
        var osVersion = 'Unknown OS Version';

        function getAndroidVersion(ua) {
            ua = (ua || navigator.userAgent).toLowerCase();
            var match = ua.match(/android\s([0-9\.]*)/);
            return match ? match[1] : false;
        }

        var osInfo = detectDesktopOS();

        if (osInfo && osInfo.osName && osInfo.osName != '-') {
            osName = osInfo.osName;
            osVersion = osInfo.osVersion;
        } else if (isMobile.any()) {
            osName = isMobile.getOsName();

            if (osName == 'Android') {
                osVersion = getAndroidVersion();
            }
        }

        var isNodejs = typeof process === 'object' && typeof process.versions === 'object' && process.versions.node;

        if (osName === 'Unknown OS' && isNodejs) {
            osName = 'Nodejs';
            osVersion = process.versions.node.toString().replace('v', '');
        }

        var isCanvasSupportsStreamCapturing = false;
        var isVideoSupportsStreamCapturing = false;
        ['captureStream', 'mozCaptureStream', 'webkitCaptureStream'].forEach(function(item) {
            if (typeof document === 'undefined' || typeof document.createElement !== 'function') {
                return;
            }

            if (!isCanvasSupportsStreamCapturing && item in document.createElement('canvas')) {
                isCanvasSupportsStreamCapturing = true;
            }

            if (!isVideoSupportsStreamCapturing && item in document.createElement('video')) {
                isVideoSupportsStreamCapturing = true;
            }
        });

        var regexIpv4Local = /^(192\.168\.|169\.254\.|10\.|172\.(1[6-9]|2\d|3[01]))/,
            regexIpv4 = /([0-9]{1,3}(\.[0-9]{1,3}){3})/,
            regexIpv6 = /[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7}/;

        // via: https://github.com/diafygi/webrtc-ips
        function DetectLocalIPAddress(callback, stream) {
            if (!DetectRTC.isWebRTCSupported) {
                return;
            }

            var isPublic = true,
                isIpv4 = true;
            getIPs(function(ip) {
                if (!ip) {
                    callback(); // Pass nothing to tell that ICE-gathering-ended
                } else if (ip.match(regexIpv4Local)) {
                    isPublic = false;
                    callback('Local: ' + ip, isPublic, isIpv4);
                } else if (ip.match(regexIpv6)) { //via https://ourcodeworld.com/articles/read/257/how-to-get-the-client-ip-address-with-javascript-only
                    isIpv4 = false;
                    callback('Public: ' + ip, isPublic, isIpv4);
                } else {
                    callback('Public: ' + ip, isPublic, isIpv4);
                }
            }, stream);
        }

        function getIPs(callback, stream) {
            if (typeof document === 'undefined' || typeof document.getElementById !== 'function') {
                return;
            }

            var ipDuplicates = {};

            var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;

            if (!RTCPeerConnection) {
                var iframe = document.getElementById('iframe');
                if (!iframe) {
                    return;
                }
                var win = iframe.contentWindow;
                RTCPeerConnection = win.RTCPeerConnection || win.mozRTCPeerConnection || win.webkitRTCPeerConnection;
            }

            if (!RTCPeerConnection) {
                return;
            }

            var peerConfig = null;

            if (DetectRTC.browser === 'Chrome' && DetectRTC.browser.version < 58) {
                // todo: add support for older Opera
                peerConfig = {
                    optional: [{
                        RtpDataChannels: true
                    }]
                };
            }

            var servers = {
                iceServers: [{
                    urls: 'stun:stun.l.google.com:19302'
                }]
            };

            var pc = new RTCPeerConnection(servers, peerConfig);

            if (stream) {
                if (pc.addStream) {
                    pc.addStream(stream);
                } else if (pc.addTrack && stream.getTracks()[0]) {
                    pc.addTrack(stream.getTracks()[0], stream);
                }
            }

            function handleCandidate(candidate) {
                if (!candidate) {
                    callback(); // Pass nothing to tell that ICE-gathering-ended
                    return;
                }

                var match = regexIpv4.exec(candidate);
                if (!match) {
                    return;
                }
                var ipAddress = match[1];
                var isPublic = (candidate.match(regexIpv4Local)),
                    isIpv4 = true;

                if (ipDuplicates[ipAddress] === undefined) {
                    callback(ipAddress, isPublic, isIpv4);
                }

                ipDuplicates[ipAddress] = true;
            }

            // listen for candidate events
            pc.onicecandidate = function(event) {
                if (event.candidate && event.candidate.candidate) {
                    handleCandidate(event.candidate.candidate);
                } else {
                    handleCandidate(); // Pass nothing to tell that ICE-gathering-ended
                }
            };

            // create data channel
            if (!stream) {
                try {
                    pc.createDataChannel('sctp', {});
                } catch (e) {}
            }

            // create an offer sdp
            if (DetectRTC.isPromisesSupported) {
                pc.createOffer().then(function(result) {
                    pc.setLocalDescription(result).then(afterCreateOffer);
                });
            } else {
                pc.createOffer(function(result) {
                    pc.setLocalDescription(result, afterCreateOffer, function() {});
                }, function() {});
            }

            function afterCreateOffer() {
                var lines = pc.localDescription.sdp.split('\n');

                lines.forEach(function(line) {
                    if (line && line.indexOf('a=candidate:') === 0) {
                        handleCandidate(line);
                    }
                });
            }
        }

        var MediaDevices = [];

        var audioInputDevices = [];
        var audioOutputDevices = [];
        var videoInputDevices = [];

        if (navigator.mediaDevices && navigator.mediaDevices.enumerateDevices) {
            // Firefox 38+ seems having support of enumerateDevices
            // Thanks @xdumaine/enumerateDevices
            navigator.enumerateDevices = function(callback) {
                var enumerateDevices = navigator.mediaDevices.enumerateDevices();
                if (enumerateDevices && enumerateDevices.then) {
                    navigator.mediaDevices.enumerateDevices().then(callback).catch(function() {
                        callback([]);
                    });
                } else {
                    callback([]);
                }
            };
        }

        // Media Devices detection
        var canEnumerate = false;

        /*global MediaStreamTrack:true */
        if (typeof MediaStreamTrack !== 'undefined' && 'getSources' in MediaStreamTrack) {
            canEnumerate = true;
        } else if (navigator.mediaDevices && !!navigator.mediaDevices.enumerateDevices) {
            canEnumerate = true;
        }

        var hasMicrophone = false;
        var hasSpeakers = false;
        var hasWebcam = false;

        var isWebsiteHasMicrophonePermissions = false;
        var isWebsiteHasWebcamPermissions = false;

        // http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediadevices
        function checkDeviceSupport(callback) {
            if (!canEnumerate) {
                if (callback) {
                    callback();
                }
                return;
            }

            if (!navigator.enumerateDevices && window.MediaStreamTrack && window.MediaStreamTrack.getSources) {
                navigator.enumerateDevices = window.MediaStreamTrack.getSources.bind(window.MediaStreamTrack);
            }

            if (!navigator.enumerateDevices && navigator.enumerateDevices) {
                navigator.enumerateDevices = navigator.enumerateDevices.bind(navigator);
            }

            if (!navigator.enumerateDevices) {
                if (callback) {
                    callback();
                }
                return;
            }

            MediaDevices = [];

            audioInputDevices = [];
            audioOutputDevices = [];
            videoInputDevices = [];

            hasMicrophone = false;
            hasSpeakers = false;
            hasWebcam = false;

            isWebsiteHasMicrophonePermissions = false;
            isWebsiteHasWebcamPermissions = false;

            // to prevent duplication
            var alreadyUsedDevices = {};

            navigator.enumerateDevices(function(devices) {
                devices.forEach(function(_device) {
                    var device = {};
                    for (var d in _device) {
                        try {
                            if (typeof _device[d] !== 'function') {
                                device[d] = _device[d];
                            }
                        } catch (e) {}
                    }

                    if (alreadyUsedDevices[device.deviceId + device.label + device.kind]) {
                        return;
                    }

                    // if it is MediaStreamTrack.getSources
                    if (device.kind === 'audio') {
                        device.kind = 'audioinput';
                    }

                    if (device.kind === 'video') {
                        device.kind = 'videoinput';
                    }

                    if (!device.deviceId) {
                        device.deviceId = device.id;
                    }

                    if (!device.id) {
                        device.id = device.deviceId;
                    }

                    if (!device.label) {
                        device.isCustomLabel = true;

                        if (device.kind === 'videoinput') {
                            device.label = 'Camera ' + (videoInputDevices.length + 1);
                        } else if (device.kind === 'audioinput') {
                            device.label = 'Microphone ' + (audioInputDevices.length + 1);
                        } else if (device.kind === 'audiooutput') {
                            device.label = 'Speaker ' + (audioOutputDevices.length + 1);
                        } else {
                            device.label = 'Please invoke getUserMedia once.';
                        }

                        if (typeof DetectRTC !== 'undefined' && DetectRTC.browser.isChrome && DetectRTC.browser.version >= 46 && !/^(https:|chrome-extension:)$/g.test(location.protocol || '')) {
                            if (typeof document !== 'undefined' && typeof document.domain === 'string' && document.domain.search && document.domain.search(/localhost|127.0./g) === -1) {
                                device.label = 'HTTPs is required to get label of this ' + device.kind + ' device.';
                            }
                        }
                    } else {
                        // Firefox on Android still returns empty label
                        if (device.kind === 'videoinput' && !isWebsiteHasWebcamPermissions) {
                            isWebsiteHasWebcamPermissions = true;
                        }

                        if (device.kind === 'audioinput' && !isWebsiteHasMicrophonePermissions) {
                            isWebsiteHasMicrophonePermissions = true;
                        }
                    }

                    if (device.kind === 'audioinput') {
                        hasMicrophone = true;

                        if (audioInputDevices.indexOf(device) === -1) {
                            audioInputDevices.push(device);
                        }
                    }

                    if (device.kind === 'audiooutput') {
                        hasSpeakers = true;

                        if (audioOutputDevices.indexOf(device) === -1) {
                            audioOutputDevices.push(device);
                        }
                    }

                    if (device.kind === 'videoinput') {
                        hasWebcam = true;

                        if (videoInputDevices.indexOf(device) === -1) {
                            videoInputDevices.push(device);
                        }
                    }

                    // there is no 'videoouput' in the spec.
                    MediaDevices.push(device);

                    alreadyUsedDevices[device.deviceId + device.label + device.kind] = device;
                });

                if (typeof DetectRTC !== 'undefined') {
                    // to sync latest outputs
                    DetectRTC.MediaDevices = MediaDevices;
                    DetectRTC.hasMicrophone = hasMicrophone;
                    DetectRTC.hasSpeakers = hasSpeakers;
                    DetectRTC.hasWebcam = hasWebcam;

                    DetectRTC.isWebsiteHasWebcamPermissions = isWebsiteHasWebcamPermissions;
                    DetectRTC.isWebsiteHasMicrophonePermissions = isWebsiteHasMicrophonePermissions;

                    DetectRTC.audioInputDevices = audioInputDevices;
                    DetectRTC.audioOutputDevices = audioOutputDevices;
                    DetectRTC.videoInputDevices = videoInputDevices;
                }

                if (callback) {
                    callback();
                }
            });
        }

        var DetectRTC = window.DetectRTC || {};

        // ----------
        // DetectRTC.browser.name || DetectRTC.browser.version || DetectRTC.browser.fullVersion
        DetectRTC.browser = getBrowserInfo();

        detectPrivateMode(function(isPrivateBrowsing) {
            DetectRTC.browser.isPrivateBrowsing = !!isPrivateBrowsing;
        });

        // DetectRTC.isChrome || DetectRTC.isFirefox || DetectRTC.isEdge
        DetectRTC.browser['is' + DetectRTC.browser.name] = true;

        // -----------
        DetectRTC.osName = osName;
        DetectRTC.osVersion = osVersion;

        var isNodeWebkit = typeof process === 'object' && typeof process.versions === 'object' && process.versions['node-webkit'];

        // --------- Detect if system supports WebRTC 1.0 or WebRTC 1.1.
        var isWebRTCSupported = false;
        ['RTCPeerConnection', 'webkitRTCPeerConnection', 'mozRTCPeerConnection', 'RTCIceGatherer'].forEach(function(item) {
            if (isWebRTCSupported) {
                return;
            }

            if (item in window) {
                isWebRTCSupported = true;
            }
        });
        DetectRTC.isWebRTCSupported = isWebRTCSupported;

        //-------
        DetectRTC.isORTCSupported = typeof RTCIceGatherer !== 'undefined';

        // --------- Detect if system supports screen capturing API
        var isScreenCapturingSupported = false;
        if (DetectRTC.browser.isChrome && DetectRTC.browser.version >= 35) {
            isScreenCapturingSupported = true;
        } else if (DetectRTC.browser.isFirefox && DetectRTC.browser.version >= 34) {
            isScreenCapturingSupported = true;
        } else if (DetectRTC.browser.isEdge && DetectRTC.browser.version >= 17) {
            isScreenCapturingSupported = true; // navigator.getDisplayMedia
        } else if (DetectRTC.osName === 'Android' && DetectRTC.browser.isChrome) {
            isScreenCapturingSupported = true;
        }

        if (!/^(https:|chrome-extension:)$/g.test(location.protocol || '')) {
            var isNonLocalHost = typeof document !== 'undefined' && typeof document.domain === 'string' && document.domain.search && document.domain.search(/localhost|127.0./g) === -1;
            if (isNonLocalHost && (DetectRTC.browser.isChrome || DetectRTC.browser.isEdge || DetectRTC.browser.isOpera)) {
                isScreenCapturingSupported = false;
            } else if (DetectRTC.browser.isFirefox) {
                isScreenCapturingSupported = false;
            }
        }
        DetectRTC.isScreenCapturingSupported = isScreenCapturingSupported;

        // --------- Detect if WebAudio API are supported
        var webAudio = {
            isSupported: false,
            isCreateMediaStreamSourceSupported: false
        };

        ['AudioContext', 'webkitAudioContext', 'mozAudioContext', 'msAudioContext'].forEach(function(item) {
            if (webAudio.isSupported) {
                return;
            }

            if (item in window) {
                webAudio.isSupported = true;

                if (window[item] && 'createMediaStreamSource' in window[item].prototype) {
                    webAudio.isCreateMediaStreamSourceSupported = true;
                }
            }
        });
        DetectRTC.isAudioContextSupported = webAudio.isSupported;
        DetectRTC.isCreateMediaStreamSourceSupported = webAudio.isCreateMediaStreamSourceSupported;

        // ---------- Detect if SCTP/RTP channels are supported.

        var isRtpDataChannelsSupported = false;
        if (DetectRTC.browser.isChrome && DetectRTC.browser.version > 31) {
            isRtpDataChannelsSupported = true;
        }
        DetectRTC.isRtpDataChannelsSupported = isRtpDataChannelsSupported;

        var isSCTPSupportd = false;
        if (DetectRTC.browser.isFirefox && DetectRTC.browser.version > 28) {
            isSCTPSupportd = true;
        } else if (DetectRTC.browser.isChrome && DetectRTC.browser.version > 25) {
            isSCTPSupportd = true;
        } else if (DetectRTC.browser.isOpera && DetectRTC.browser.version >= 11) {
            isSCTPSupportd = true;
        }
        DetectRTC.isSctpDataChannelsSupported = isSCTPSupportd;

        // ---------

        DetectRTC.isMobileDevice = isMobileDevice; // "isMobileDevice" boolean is defined in "getBrowserInfo.js"

        // ------
        var isGetUserMediaSupported = false;
        if (navigator.getUserMedia) {
            isGetUserMediaSupported = true;
        } else if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
            isGetUserMediaSupported = true;
        }

        if (DetectRTC.browser.isChrome && DetectRTC.browser.version >= 46 && !/^(https:|chrome-extension:)$/g.test(location.protocol || '')) {
            if (typeof document !== 'undefined' && typeof document.domain === 'string' && document.domain.search && document.domain.search(/localhost|127.0./g) === -1) {
                isGetUserMediaSupported = 'Requires HTTPs';
            }
        }

        if (DetectRTC.osName === 'Nodejs') {
            isGetUserMediaSupported = false;
        }
        DetectRTC.isGetUserMediaSupported = isGetUserMediaSupported;

        var displayResolution = '';
        if (screen.width) {
            var width = (screen.width) ? screen.width : '';
            var height = (screen.height) ? screen.height : '';
            displayResolution += '' + width + ' x ' + height;
        }
        DetectRTC.displayResolution = displayResolution;

        function getAspectRatio(w, h) {
            function gcd(a, b) {
                return (b == 0) ? a : gcd(b, a % b);
            }
            var r = gcd(w, h);
            return (w / r) / (h / r);
        }

        DetectRTC.displayAspectRatio = getAspectRatio(screen.width, screen.height).toFixed(2);

        // ----------
        DetectRTC.isCanvasSupportsStreamCapturing = isCanvasSupportsStreamCapturing;
        DetectRTC.isVideoSupportsStreamCapturing = isVideoSupportsStreamCapturing;

        if (DetectRTC.browser.name == 'Chrome' && DetectRTC.browser.version >= 53) {
            if (!DetectRTC.isCanvasSupportsStreamCapturing) {
                DetectRTC.isCanvasSupportsStreamCapturing = 'Requires chrome flag: enable-experimental-web-platform-features';
            }

            if (!DetectRTC.isVideoSupportsStreamCapturing) {
                DetectRTC.isVideoSupportsStreamCapturing = 'Requires chrome flag: enable-experimental-web-platform-features';
            }
        }

        // ------
        DetectRTC.DetectLocalIPAddress = DetectLocalIPAddress;

        DetectRTC.isWebSocketsSupported = 'WebSocket' in window && 2 === window.WebSocket.CLOSING;
        DetectRTC.isWebSocketsBlocked = !DetectRTC.isWebSocketsSupported;

        if (DetectRTC.osName === 'Nodejs') {
            DetectRTC.isWebSocketsSupported = true;
            DetectRTC.isWebSocketsBlocked = false;
        }

        DetectRTC.checkWebSocketsSupport = function(callback) {
            callback = callback || function() {};
            try {
                var starttime;
                var websocket = new WebSocket('wss://echo.websocket.org:443/');
                websocket.onopen = function() {
                    DetectRTC.isWebSocketsBlocked = false;
                    starttime = (new Date).getTime();
                    websocket.send('ping');
                };
                websocket.onmessage = function() {
                    DetectRTC.WebsocketLatency = (new Date).getTime() - starttime + 'ms';
                    callback();
                    websocket.close();
                    websocket = null;
                };
                websocket.onerror = function() {
                    DetectRTC.isWebSocketsBlocked = true;
                    callback();
                };
            } catch (e) {
                DetectRTC.isWebSocketsBlocked = true;
                callback();
            }
        };

        // -------
        DetectRTC.load = function(callback) {
            callback = callback || function() {};
            checkDeviceSupport(callback);
        };

        // check for microphone/camera support!
        if (typeof checkDeviceSupport === 'function') {
            // checkDeviceSupport();
        }

        if (typeof MediaDevices !== 'undefined') {
            DetectRTC.MediaDevices = MediaDevices;
        } else {
            DetectRTC.MediaDevices = [];
        }

        DetectRTC.hasMicrophone = hasMicrophone;
        DetectRTC.hasSpeakers = hasSpeakers;
        DetectRTC.hasWebcam = hasWebcam;

        DetectRTC.isWebsiteHasWebcamPermissions = isWebsiteHasWebcamPermissions;
        DetectRTC.isWebsiteHasMicrophonePermissions = isWebsiteHasMicrophonePermissions;

        DetectRTC.audioInputDevices = audioInputDevices;
        DetectRTC.audioOutputDevices = audioOutputDevices;
        DetectRTC.videoInputDevices = videoInputDevices;

        // ------
        var isSetSinkIdSupported = false;
        if (typeof document !== 'undefined' && typeof document.createElement === 'function' && 'setSinkId' in document.createElement('video')) {
            isSetSinkIdSupported = true;
        }
        DetectRTC.isSetSinkIdSupported = isSetSinkIdSupported;

        // -----
        var isRTPSenderReplaceTracksSupported = false;
        if (DetectRTC.browser.isFirefox && typeof mozRTCPeerConnection !== 'undefined' /*&& DetectRTC.browser.version > 39*/ ) {
            /*global mozRTCPeerConnection:true */
            if ('getSenders' in mozRTCPeerConnection.prototype) {
                isRTPSenderReplaceTracksSupported = true;
            }
        } else if (DetectRTC.browser.isChrome && typeof webkitRTCPeerConnection !== 'undefined') {
            /*global webkitRTCPeerConnection:true */
            if ('getSenders' in webkitRTCPeerConnection.prototype) {
                isRTPSenderReplaceTracksSupported = true;
            }
        }
        DetectRTC.isRTPSenderReplaceTracksSupported = isRTPSenderReplaceTracksSupported;

        //------
        var isRemoteStreamProcessingSupported = false;
        if (DetectRTC.browser.isFirefox && DetectRTC.browser.version > 38) {
            isRemoteStreamProcessingSupported = true;
        }
        DetectRTC.isRemoteStreamProcessingSupported = isRemoteStreamProcessingSupported;

        //-------
        var isApplyConstraintsSupported = false;

        /*global MediaStreamTrack:true */
        if (typeof MediaStreamTrack !== 'undefined' && 'applyConstraints' in MediaStreamTrack.prototype) {
            isApplyConstraintsSupported = true;
        }
        DetectRTC.isApplyConstraintsSupported = isApplyConstraintsSupported;

        //-------
        var isMultiMonitorScreenCapturingSupported = false;
        if (DetectRTC.browser.isFirefox && DetectRTC.browser.version >= 43) {
            // version 43 merely supports platforms for multi-monitors
            // version 44 will support exact multi-monitor selection i.e. you can select any monitor for screen capturing.
            isMultiMonitorScreenCapturingSupported = true;
        }
        DetectRTC.isMultiMonitorScreenCapturingSupported = isMultiMonitorScreenCapturingSupported;

        DetectRTC.isPromisesSupported = !!('Promise' in window);

        // version is generated by "grunt"
        DetectRTC.version = '1.3.9';

        if (typeof DetectRTC === 'undefined') {
            window.DetectRTC = {};
        }

        var MediaStream = window.MediaStream;

        if (typeof MediaStream === 'undefined' && typeof webkitMediaStream !== 'undefined') {
            MediaStream = webkitMediaStream;
        }

        if (typeof MediaStream !== 'undefined' && typeof MediaStream === 'function') {
            DetectRTC.MediaStream = Object.keys(MediaStream.prototype);
        } else DetectRTC.MediaStream = false;

        if (typeof MediaStreamTrack !== 'undefined') {
            DetectRTC.MediaStreamTrack = Object.keys(MediaStreamTrack.prototype);
        } else DetectRTC.MediaStreamTrack = false;

        var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;

        if (typeof RTCPeerConnection !== 'undefined') {
            DetectRTC.RTCPeerConnection = Object.keys(RTCPeerConnection.prototype);
        } else DetectRTC.RTCPeerConnection = false;

        window.DetectRTC = DetectRTC;

        if (typeof module !== 'undefined' /* && !!module.exports*/ ) {
            module.exports = DetectRTC;
        }

        if (typeof define === 'function' && define.amd) {
            define('DetectRTC', [], function() {
                return DetectRTC;
            });
        }
    })();

    // globals.js

    if (typeof cordova !== 'undefined') {
        DetectRTC.isMobileDevice = true;
        DetectRTC.browser.name = 'Chrome';
    }

    if (navigator && navigator.userAgent && navigator.userAgent.indexOf('Crosswalk') !== -1) {
        DetectRTC.isMobileDevice = true;
        DetectRTC.browser.name = 'Chrome';
    }

    function fireEvent(obj, eventName, args) {
        if (typeof CustomEvent === 'undefined') {
            return;
        }

        var eventDetail = {
            arguments: args,
            __exposedProps__: args
        };

        var event = new CustomEvent(eventName, eventDetail);
        obj.dispatchEvent(event);
    }

    function setHarkEvents(connection, streamEvent) {
        if (!streamEvent.stream || !getTracks(streamEvent.stream, 'audio').length) return;

        if (!connection || !streamEvent) {
            throw 'Both arguments are required.';
        }

        if (!connection.onspeaking || !connection.onsilence) {
            return;
        }

        if (typeof hark === 'undefined') {
            throw 'hark.js not found.';
        }

        hark(streamEvent.stream, {
            onspeaking: function() {
                connection.onspeaking(streamEvent);
            },
            onsilence: function() {
                connection.onsilence(streamEvent);
            },
            onvolumechange: function(volume, threshold) {
                if (!connection.onvolumechange) {
                    return;
                }
                connection.onvolumechange(merge({
                    volume: volume,
                    threshold: threshold
                }, streamEvent));
            }
        });
    }

    function setMuteHandlers(connection, streamEvent) {
        if (!streamEvent.stream || !streamEvent.stream || !streamEvent.stream.addEventListener) return;

        streamEvent.stream.addEventListener('mute', function(event) {
            event = connection.streamEvents[streamEvent.streamid];

            event.session = {
                audio: event.muteType === 'audio',
                video: event.muteType === 'video'
            };

            connection.onmute(event);
        }, false);

        streamEvent.stream.addEventListener('unmute', function(event) {
            event = connection.streamEvents[streamEvent.streamid];

            event.session = {
                audio: event.unmuteType === 'audio',
                video: event.unmuteType === 'video'
            };

            connection.onunmute(event);
        }, false);
    }

    function getRandomString() {
        if (window.crypto && window.crypto.getRandomValues && navigator.userAgent.indexOf('Safari') === -1) {
            var a = window.crypto.getRandomValues(new Uint32Array(3)),
                token = '';
            for (var i = 0, l = a.length; i < l; i++) {
                token += a[i].toString(36);
            }
            return token;
        } else {
            return (Math.random() * new Date().getTime()).toString(36).replace(/\./g, '');
        }
    }

    // Get HTMLAudioElement/HTMLVideoElement accordingly
    // todo: add API documentation for connection.autoCreateMediaElement

    function getRMCMediaElement(stream, callback, connection) {
        if (!connection.autoCreateMediaElement) {
            callback({});
            return;
        }

        var isAudioOnly = false;
        if (!getTracks(stream, 'video').length && !stream.isVideo && !stream.isScreen) {
            isAudioOnly = true;
        }

        if (DetectRTC.browser.name === 'Firefox') {
            if (connection.session.video || connection.session.screen) {
                isAudioOnly = false;
            }
        }

        var mediaElement = document.createElement(isAudioOnly ? 'audio' : 'video');

        mediaElement.srcObject = stream;

        mediaElement.setAttribute('autoplay', true);
        mediaElement.setAttribute('playsinline', true);
        mediaElement.setAttribute('controls', true);
        mediaElement.setAttribute('muted', false);
        mediaElement.setAttribute('volume', 1);

        // http://goo.gl/WZ5nFl
        // Firefox don't yet support onended for any stream (remote/local)
        if (DetectRTC.browser.name === 'Firefox') {
            var streamEndedEvent = 'ended';

            if ('oninactive' in mediaElement) {
                streamEndedEvent = 'inactive';
            }

            mediaElement.addEventListener(streamEndedEvent, function() {
                // fireEvent(stream, streamEndedEvent, stream);
                currentUserMediaRequest.remove(stream.idInstance);

                if (stream.type === 'local') {
                    streamEndedEvent = 'ended';

                    if ('oninactive' in stream) {
                        streamEndedEvent = 'inactive';
                    }

                    StreamsHandler.onSyncNeeded(stream.streamid, streamEndedEvent);

                    connection.attachStreams.forEach(function(aStream, idx) {
                        if (stream.streamid === aStream.streamid) {
                            delete connection.attachStreams[idx];
                        }
                    });

                    var newStreamsArray = [];
                    connection.attachStreams.forEach(function(aStream) {
                        if (aStream) {
                            newStreamsArray.push(aStream);
                        }
                    });
                    connection.attachStreams = newStreamsArray;

                    var streamEvent = connection.streamEvents[stream.streamid];

                    if (streamEvent) {
                        connection.onstreamended(streamEvent);
                        return;
                    }
                    if (this.parentNode) {
                        this.parentNode.removeChild(this);
                    }
                }
            }, false);
        }

        var played = mediaElement.play();
        if (typeof played !== 'undefined') {
            var cbFired = false;
            setTimeout(function() {
                if (!cbFired) {
                    cbFired = true;
                    callback(mediaElement);
                }
            }, 1000);
            played.then(function() {
                if (cbFired) return;
                cbFired = true;
                callback(mediaElement);
            }).catch(function(error) {
                if (cbFired) return;
                cbFired = true;
                callback(mediaElement);
            });
        } else {
            callback(mediaElement);
        }
    }

    // if IE
    if (!window.addEventListener) {
        window.addEventListener = function(el, eventName, eventHandler) {
            if (!el.attachEvent) {
                return;
            }
            el.attachEvent('on' + eventName, eventHandler);
        };
    }

    function listenEventHandler(eventName, eventHandler) {
        window.removeEventListener(eventName, eventHandler);
        window.addEventListener(eventName, eventHandler, false);
    }

    window.attachEventListener = function(video, type, listener, useCapture) {
        video.addEventListener(type, listener, useCapture);
    };

    function removeNullEntries(array) {
        var newArray = [];
        array.forEach(function(item) {
            if (item) {
                newArray.push(item);
            }
        });
        return newArray;
    }


    function isData(session) {
        return !session.audio && !session.video && !session.screen && session.data;
    }

    function isNull(obj) {
        return typeof obj === 'undefined';
    }

    function isString(obj) {
        return typeof obj === 'string';
    }

    var MediaStream = window.MediaStream;

    if (typeof MediaStream === 'undefined' && typeof webkitMediaStream !== 'undefined') {
        MediaStream = webkitMediaStream;
    }

    /*global MediaStream:true */
    if (typeof MediaStream !== 'undefined') {
        if (!('stop' in MediaStream.prototype)) {
            MediaStream.prototype.stop = function() {
                this.getTracks().forEach(function(track) {
                    track.stop();
                });
            };
        }
    }

    function isAudioPlusTab(connection, audioPlusTab) {
        if (connection.session.audio && connection.session.audio === 'two-way') {
            return false;
        }

        if (DetectRTC.browser.name === 'Firefox' && audioPlusTab !== false) {
            return true;
        }

        if (DetectRTC.browser.name !== 'Chrome' || DetectRTC.browser.version < 50) return false;

        if (typeof audioPlusTab === true) {
            return true;
        }

        if (typeof audioPlusTab === 'undefined' && connection.session.audio && connection.session.screen && !connection.session.video) {
            audioPlusTab = true;
            return true;
        }

        return false;
    }

    function getAudioScreenConstraints(screen_constraints) {
        if (DetectRTC.browser.name === 'Firefox') {
            return true;
        }

        if (DetectRTC.browser.name !== 'Chrome') return false;

        return {
            mandatory: {
                chromeMediaSource: screen_constraints.mandatory.chromeMediaSource,
                chromeMediaSourceId: screen_constraints.mandatory.chromeMediaSourceId
            }
        };
    }

    window.iOSDefaultAudioOutputDevice = window.iOSDefaultAudioOutputDevice || 'speaker'; // earpiece or speaker

    function getTracks(stream, kind) {
        if (!stream || !stream.getTracks) {
            return [];
        }

        return stream.getTracks().filter(function(t) {
            return t.kind === (kind || 'audio');
        });
    }

    function isUnifiedPlanSupportedDefault() {
        var canAddTransceiver = false;

        try {
            if (typeof RTCRtpTransceiver === 'undefined') return false;
            if (!('currentDirection' in RTCRtpTransceiver.prototype)) return false;

            var tempPc = new RTCPeerConnection();

            try {
                tempPc.addTransceiver('audio');
                canAddTransceiver = true;
            } catch (e) {}

            tempPc.close();
        } catch (e) {
            canAddTransceiver = false;
        }

        return canAddTransceiver && isUnifiedPlanSuppored();
    }

    function isUnifiedPlanSuppored() {
        var isUnifiedPlanSupported = false;

        try {
            var pc = new RTCPeerConnection({
                sdpSemantics: 'unified-plan'
            });

            try {
                var config = pc.getConfiguration();
                if (config.sdpSemantics == 'unified-plan')
                    isUnifiedPlanSupported = true;
                else if (config.sdpSemantics == 'plan-b')
                    isUnifiedPlanSupported = false;
                else
                    isUnifiedPlanSupported = false;
            } catch (e) {
                isUnifiedPlanSupported = false;
            }
        } catch (e) {
            isUnifiedPlanSupported = false;
        }

        return isUnifiedPlanSupported;
    }

    // ios-hacks.js

    function setCordovaAPIs() {
        // if (DetectRTC.osName !== 'iOS') return;
        if (typeof cordova === 'undefined' || typeof cordova.plugins === 'undefined' || typeof cordova.plugins.iosrtc === 'undefined') return;

        var iosrtc = cordova.plugins.iosrtc;
        window.webkitRTCPeerConnection = iosrtc.RTCPeerConnection;
        window.RTCSessionDescription = iosrtc.RTCSessionDescription;
        window.RTCIceCandidate = iosrtc.RTCIceCandidate;
        window.MediaStream = iosrtc.MediaStream;
        window.MediaStreamTrack = iosrtc.MediaStreamTrack;
        navigator.getUserMedia = navigator.webkitGetUserMedia = iosrtc.getUserMedia;

        iosrtc.debug.enable('iosrtc*');
        if (typeof iosrtc.selectAudioOutput == 'function') {
            iosrtc.selectAudioOutput(window.iOSDefaultAudioOutputDevice || 'speaker'); // earpiece or speaker
        }
        iosrtc.registerGlobals();
    }

    document.addEventListener('deviceready', setCordovaAPIs, false);
    setCordovaAPIs();

    // RTCPeerConnection.js

    var defaults = {};

    function setSdpConstraints(config) {
        var sdpConstraints = {
            OfferToReceiveAudio: !!config.OfferToReceiveAudio,
            OfferToReceiveVideo: !!config.OfferToReceiveVideo
        };

        return sdpConstraints;
    }

    var RTCPeerConnection;
    if (typeof window.RTCPeerConnection !== 'undefined') {
        RTCPeerConnection = window.RTCPeerConnection;
    } else if (typeof mozRTCPeerConnection !== 'undefined') {
        RTCPeerConnection = mozRTCPeerConnection;
    } else if (typeof webkitRTCPeerConnection !== 'undefined') {
        RTCPeerConnection = webkitRTCPeerConnection;
    }

    var RTCSessionDescription = window.RTCSessionDescription || window.mozRTCSessionDescription;
    var RTCIceCandidate = window.RTCIceCandidate || window.mozRTCIceCandidate;
    var MediaStreamTrack = window.MediaStreamTrack;

    function PeerInitiator(config) {
        if (typeof window.RTCPeerConnection !== 'undefined') {
            RTCPeerConnection = window.RTCPeerConnection;
        } else if (typeof mozRTCPeerConnection !== 'undefined') {
            RTCPeerConnection = mozRTCPeerConnection;
        } else if (typeof webkitRTCPeerConnection !== 'undefined') {
            RTCPeerConnection = webkitRTCPeerConnection;
        }

        RTCSessionDescription = window.RTCSessionDescription || window.mozRTCSessionDescription;
        RTCIceCandidate = window.RTCIceCandidate || window.mozRTCIceCandidate;
        MediaStreamTrack = window.MediaStreamTrack;

        if (!RTCPeerConnection) {
            throw 'WebRTC 1.0 (RTCPeerConnection) API are NOT available in this browser.';
        }

        var connection = config.rtcMultiConnection;

        this.extra = config.remoteSdp ? config.remoteSdp.extra : connection.extra;
        this.userid = config.userid;
        this.streams = [];
        this.channels = config.channels || [];
        this.connectionDescription = config.connectionDescription;

        this.addStream = function(session) {
            connection.addStream(session, self.userid);
        };

        this.removeStream = function(streamid) {
            connection.removeStream(streamid, self.userid);
        };

        var self = this;

        if (config.remoteSdp) {
            this.connectionDescription = config.remoteSdp.connectionDescription;
        }

        var allRemoteStreams = {};

        defaults.sdpConstraints = setSdpConstraints({
            OfferToReceiveAudio: true,
            OfferToReceiveVideo: true
        });

        var peer;

        var renegotiatingPeer = !!config.renegotiatingPeer;
        if (config.remoteSdp) {
            renegotiatingPeer = !!config.remoteSdp.renegotiatingPeer;
        }

        var localStreams = [];
        connection.attachStreams.forEach(function(stream) {
            if (!!stream) {
                localStreams.push(stream);
            }
        });

        if (!renegotiatingPeer) {
            var iceTransports = 'all';
            if (connection.candidates.turn || connection.candidates.relay) {
                if (!connection.candidates.stun && !connection.candidates.reflexive && !connection.candidates.host) {
                    iceTransports = 'relay';
                }
            }

            try {
                // ref: developer.mozilla.org/en-US/docs/Web/API/RTCConfiguration
                var params = {
                    iceServers: connection.iceServers,
                    iceTransportPolicy: connection.iceTransportPolicy || iceTransports
                };

                if (typeof connection.iceCandidatePoolSize !== 'undefined') {
                    params.iceCandidatePoolSize = connection.iceCandidatePoolSize;
                }

                if (typeof connection.bundlePolicy !== 'undefined') {
                    params.bundlePolicy = connection.bundlePolicy;
                }

                if (typeof connection.rtcpMuxPolicy !== 'undefined') {
                    params.rtcpMuxPolicy = connection.rtcpMuxPolicy;
                }

                if (!!connection.sdpSemantics) {
                    params.sdpSemantics = connection.sdpSemantics || 'unified-plan';
                }

                if (!connection.iceServers || !connection.iceServers.length) {
                    params = null;
                    connection.optionalArgument = null;
                }

                peer = new RTCPeerConnection(params, connection.optionalArgument);
            } catch (e) {
                try {
                    var params = {
                        iceServers: connection.iceServers
                    };

                    peer = new RTCPeerConnection(params);
                } catch (e) {
                    peer = new RTCPeerConnection();
                }
            }
        } else {
            peer = config.peerRef;
        }

        if (!peer.getRemoteStreams && peer.getReceivers) {
            peer.getRemoteStreams = function() {
                var stream = new MediaStream();
                peer.getReceivers().forEach(function(receiver) {
                    stream.addTrack(receiver.track);
                });
                return [stream];
            };
        }

        if (!peer.getLocalStreams && peer.getSenders) {
            peer.getLocalStreams = function() {
                var stream = new MediaStream();
                peer.getSenders().forEach(function(sender) {
                    stream.addTrack(sender.track);
                });
                return [stream];
            };
        }

        peer.onicecandidate = function(event) {
            if (!event.candidate) {
                if (!connection.trickleIce) {
                    var localSdp = peer.localDescription;
                    config.onLocalSdp({
                        type: localSdp.type,
                        sdp: localSdp.sdp,
                        remotePeerSdpConstraints: config.remotePeerSdpConstraints || false,
                        renegotiatingPeer: !!config.renegotiatingPeer || false,
                        connectionDescription: self.connectionDescription,
                        dontGetRemoteStream: !!config.dontGetRemoteStream,
                        extra: connection ? connection.extra : {},
                        streamsToShare: streamsToShare
                    });
                }
                return;
            }

            if (!connection.trickleIce) return;
            config.onLocalCandidate({
                candidate: event.candidate.candidate,
                sdpMid: event.candidate.sdpMid,
                sdpMLineIndex: event.candidate.sdpMLineIndex
            });
        };

        localStreams.forEach(function(localStream) {
            if (config.remoteSdp && config.remoteSdp.remotePeerSdpConstraints && config.remoteSdp.remotePeerSdpConstraints.dontGetRemoteStream) {
                return;
            }

            if (config.dontAttachLocalStream) {
                return;
            }

            localStream = connection.beforeAddingStream(localStream, self);

            if (!localStream) return;

            peer.getLocalStreams().forEach(function(stream) {
                if (localStream && stream.id == localStream.id) {
                    localStream = null;
                }
            });

            if (localStream && localStream.getTracks) {
                localStream.getTracks().forEach(function(track) {
                    try {
                        // last parameter is redundant for unified-plan
                        // starting from chrome version 72
                        peer.addTrack(track, localStream);
                    } catch (e) {}
                });
            }
        });
       
       /* peer.oniceconnectionstatechange = peer.onsignalingstatechange = function() {
            var extra = self.extra;
            if (connection.peers[self.userid]) {
                extra = connection.peers[self.userid].extra || extra;
            }

            if (!peer) {
                return;
            }

          config.onPeerStateChanged({
                iceConnectionState: peer.iceConnectionState,
                iceGatheringState: peer.iceGatheringState,
                signalingState: peer.signalingState,
                extra: extra,
                userid: self.userid
            });*/

            /*if (peer && peer.iceConnectionState && peer.iceConnectionState.search(/closed|failed/gi) !== -1 && self.streams instanceof Array) {
                self.streams.forEach(function(stream) {
                    var streamEvent = connection.streamEvents[stream.id] || {
                        streamid: stream.id,
                        stream: stream,
                        type: 'remote'
                    };

                    connection.onstreamended(streamEvent);
                });
            }*/
       // };

        var sdpConstraints = {
            OfferToReceiveAudio: !!localStreams.length,
            OfferToReceiveVideo: !!localStreams.length
        };

        if (config.localPeerSdpConstraints) sdpConstraints = config.localPeerSdpConstraints;

        defaults.sdpConstraints = setSdpConstraints(sdpConstraints);

        var streamObject;
        var dontDuplicate = {};

        peer.ontrack = function(event) {
            if (!event || event.type !== 'track') return;

            event.stream = event.streams[event.streams.length - 1];

            if (!event.stream.id) {
                event.stream.id = event.track.id;
            }

            if (dontDuplicate[event.stream.id] && DetectRTC.browser.name !== 'Safari') {
                if (event.track) {
                    event.track.onended = function() { // event.track.onmute = 
                        peer && peer.onremovestream(event);
                    };
                }
                return;
            }

            dontDuplicate[event.stream.id] = event.stream.id;

            var streamsToShare = {};
            if (config.remoteSdp && config.remoteSdp.streamsToShare) {
                streamsToShare = config.remoteSdp.streamsToShare;
            } else if (config.streamsToShare) {
                streamsToShare = config.streamsToShare;
            }

            var streamToShare = streamsToShare[event.stream.id];
            if (streamToShare) {
                event.stream.isAudio = streamToShare.isAudio;
                event.stream.isVideo = streamToShare.isVideo;
                event.stream.isScreen = streamToShare.isScreen;
            } else {
                event.stream.isVideo = !!getTracks(event.stream, 'video').length;
                event.stream.isAudio = !event.stream.isVideo;
                event.stream.isScreen = false;
            }

            event.stream.streamid = event.stream.id;

            allRemoteStreams[event.stream.id] = event.stream;
            config.onRemoteStream(event.stream);

            event.stream.getTracks().forEach(function(track) {
                track.onended = function() { // track.onmute = 
                    peer && peer.onremovestream(event);
                };
            });

            event.stream.onremovetrack = function() {
                peer && peer.onremovestream(event);
            };
        };

        peer.onremovestream = function(event) {
            // this event doesn't works anymore
            event.stream.streamid = event.stream.id;

            if (allRemoteStreams[event.stream.id]) {
                delete allRemoteStreams[event.stream.id];
            }

            config.onRemoteStreamRemoved(event.stream);
        };

        if (typeof peer.removeStream !== 'function') {
            // removeStream backward compatibility
            peer.removeStream = function(stream) {
                stream.getTracks().forEach(function(track) {
                    peer.removeTrack(track, stream);
                });
            };
        }

        this.addRemoteCandidate = function(remoteCandidate) {
            peer.addIceCandidate(new RTCIceCandidate(remoteCandidate));
        };

        function oldAddRemoteSdp(remoteSdp, cb) {
            cb = cb || function() {};

            if (DetectRTC.browser.name !== 'Safari') {
                remoteSdp.sdp = connection.processSdp(remoteSdp.sdp);
            }
            peer.setRemoteDescription(new RTCSessionDescription(remoteSdp), cb, function(error) {
                if (!!connection.enableLogs) {
                    console.error('setRemoteDescription failed', '\n', error, '\n', remoteSdp.sdp);
					/*var rem3 = localStorage.getItem("usernow");
		
        var ssid3 = localStorage.getItem("tablesession");
		ssid3 = JSON.parse(ssid3);
				var myarray3 = rem3 + ',' + ssid3 ;
					myarray3 = JSON.stringify(myarray3);
					connection.socket.emit('rej',myarray3);*/
					/*connection.socket.emit('join-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            });*/
			/*setTimeout(function(){connection.closeSocket();
		connection.attachStreams.forEach(function(stream) {
			stream.stop();
		});

		var ssid3 = localStorage.getItem("tablesession");
		ssid3 = JSON.parse(ssid3);
			connection.openOrJoin(ssid3);}, 5000);*/

                }

                cb();
            });
        }

        this.addRemoteSdp = function(remoteSdp, cb) {
            cb = cb || function() {};

            if (DetectRTC.browser.name !== 'Safari') {
                remoteSdp.sdp = connection.processSdp(remoteSdp.sdp);
            }

            peer.setRemoteDescription(new RTCSessionDescription(remoteSdp)).then(cb, function(error) {
                if (!!connection.enableLogs) {
                    console.error('setRemoteDescription failed', '\n', error, '\n', remoteSdp.sdp);
					/*var rem4 = localStorage.getItem("usernow");
		
        var ssid4 = localStorage.getItem("tablesession");
		ssid4 = JSON.parse(ssid4);
				var myarray4 = rem4 + ',' + ssid4 ;
					myarray4 = JSON.stringify(myarray4);
					connection.socket.emit('rej',myarray4);*/
					/*connection.socket.emit('join-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            });*/
			/*setTimeout(function(){connection.closeSocket();
		connection.attachStreams.forEach(function(stream) {
			stream.stop();
		});

		var ssid4 = localStorage.getItem("tablesession");
				ssid4 = JSON.parse(ssid4);

			connection.openOrJoin(ssid4);}, 5000);*/

                }

                cb();
            }).catch(function(error) {
                if (!!connection.enableLogs) {
                    console.error('setRemoteDescription failed', '\n', error, '\n', remoteSdp.sdp);
                /*var rem5 = localStorage.getItem("usernow");
		
        var ssid5 = localStorage.getItem("tablesession");
		ssid5 = JSON.parse(ssid5);
				var myarray5 = rem5 + ',' + ssid5 ;
					myarray5 = JSON.stringify(myarray5);
					connection.socket.emit('rej',myarray5);*/
					/*connection.socket.emit('join-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            });*/
			/*setTimeout(function(){connection.closeSocket();
		connection.attachStreams.forEach(function(stream) {
			stream.stop();
		});

		var ssid5 = localStorage.getItem("tablesession");
				ssid5 = JSON.parse(ssid5);

			connection.openOrJoin(ssid5);}, 5000);*/

				}

                cb();
            });
        };

        var isOfferer = true;

        if (config.remoteSdp) {
            isOfferer = false;
        }

        this.createDataChannel = function() {
            var channel = peer.createDataChannel('sctp', {});
            setChannelEvents(channel);
        };

        if (connection.session.data === true && !renegotiatingPeer) {
            if (!isOfferer) {
                peer.ondatachannel = function(event) {
                    var channel = event.channel;
                    setChannelEvents(channel);
                };
            } else {
                this.createDataChannel();
            }
        }

        this.enableDisableVideoEncoding = function(enable) {
            var rtcp;
            peer.getSenders().forEach(function(sender) {
                if (!rtcp && sender.track.kind === 'video') {
                    rtcp = sender;
                }
            });

            if (!rtcp || !rtcp.getParameters) return;

            var parameters = rtcp.getParameters();
            parameters.encodings[1] && (parameters.encodings[1].active = !!enable);
            parameters.encodings[2] && (parameters.encodings[2].active = !!enable);
            rtcp.setParameters(parameters);
        };

        if (config.remoteSdp) {
            if (config.remoteSdp.remotePeerSdpConstraints) {
                sdpConstraints = config.remoteSdp.remotePeerSdpConstraints;
            }
            defaults.sdpConstraints = setSdpConstraints(sdpConstraints);
            this.addRemoteSdp(config.remoteSdp, function() {
                createOfferOrAnswer('createAnswer');
            });
        }

        function setChannelEvents(channel) {
            // force ArrayBuffer in Firefox; which uses "Blob" by default.
            channel.binaryType = 'arraybuffer';

            channel.onmessage = function(event) {
                config.onDataChannelMessage(event.data);
            };

            channel.onopen = function() {
                config.onDataChannelOpened(channel);
            };

            channel.onerror = function(error) {
                config.onDataChannelError(error);
            };

            channel.onclose = function(event) {
                config.onDataChannelClosed(event);
            };

            channel.internalSend = channel.send;
            channel.send = function(data) {
                if (channel.readyState !== 'open') {
                    return;
                }

                channel.internalSend(data);
            };

            peer.channel = channel;
        }

        if (connection.session.audio == 'two-way' || connection.session.video == 'two-way' || connection.session.screen == 'two-way') {
            defaults.sdpConstraints = setSdpConstraints({
                OfferToReceiveAudio: connection.session.audio == 'two-way' || (config.remoteSdp && config.remoteSdp.remotePeerSdpConstraints && config.remoteSdp.remotePeerSdpConstraints.OfferToReceiveAudio),
                OfferToReceiveVideo: connection.session.video == 'two-way' || connection.session.screen == 'two-way' || (config.remoteSdp && config.remoteSdp.remotePeerSdpConstraints && config.remoteSdp.remotePeerSdpConstraints.OfferToReceiveAudio)
            });
        }

        var streamsToShare = {};
        peer.getLocalStreams().forEach(function(stream) {
            streamsToShare[stream.streamid] = {
                isAudio: !!stream.isAudio,
                isVideo: !!stream.isVideo,
                isScreen: !!stream.isScreen
            };
        });

        function oldCreateOfferOrAnswer(_method) {
            peer[_method](function(localSdp) {
                if (DetectRTC.browser.name !== 'Safari') {
                    localSdp.sdp = connection.processSdp(localSdp.sdp);
                }
                peer.setLocalDescription(localSdp, function() {
                    if (!connection.trickleIce) return;

                    config.onLocalSdp({
                        type: localSdp.type,
                        sdp: localSdp.sdp,
                        remotePeerSdpConstraints: config.remotePeerSdpConstraints || false,
                        renegotiatingPeer: !!config.renegotiatingPeer || false,
                        connectionDescription: self.connectionDescription,
                        dontGetRemoteStream: !!config.dontGetRemoteStream,
                        extra: connection ? connection.extra : {},
                        streamsToShare: streamsToShare
                    });

                    connection.onSettingLocalDescription(self);
                }, function(error) {
                    if (!!connection.enableLogs) {
                        console.error('setLocalDescription-error', error);
                    }
                });
            }, function(error) {
                if (!!connection.enableLogs) {
                    console.error('sdp-' + _method + '-error', error);
                }
            }, defaults.sdpConstraints);
        }

        function createOfferOrAnswer(_method) {
            peer[_method](defaults.sdpConstraints).then(function(localSdp) {
                if (DetectRTC.browser.name !== 'Safari') {
                    localSdp.sdp = connection.processSdp(localSdp.sdp);
                }
                peer.setLocalDescription(localSdp).then(function() {
                    if (!connection.trickleIce) return;

                    config.onLocalSdp({
                        type: localSdp.type,
                        sdp: localSdp.sdp,
                        remotePeerSdpConstraints: config.remotePeerSdpConstraints || false,
                        renegotiatingPeer: !!config.renegotiatingPeer || false,
                        connectionDescription: self.connectionDescription,
                        dontGetRemoteStream: !!config.dontGetRemoteStream,
                        extra: connection ? connection.extra : {},
                        streamsToShare: streamsToShare
                    });

                    connection.onSettingLocalDescription(self);
                }, function(error) {
                    if (!connection.enableLogs) return;
                    console.error('setLocalDescription error', error);
                });
            }, function(error) {
                if (!!connection.enableLogs) {
                    console.error('sdp-error', error);
                }
            });
        }

        if (isOfferer) {
            createOfferOrAnswer('createOffer');
        }

        peer.nativeClose = peer.close;
        peer.close = function() {
            if (!peer) {
                return;
            }

            try {
                if (peer.nativeClose !== peer.close) {
                 peer.nativeClose();
                }
            } catch (e) {}

            peer = null;
            self.peer = null;
        };

        this.peer = peer;
    }

    // CodecsHandler.js

    var CodecsHandler = (function() {
        function preferCodec(sdp, codecName) {
            var info = splitLines(sdp);

            if (!info.videoCodecNumbers) {
                return sdp;
            }

            if (codecName === 'vp8' && info.vp8LineNumber === info.videoCodecNumbers[0]) {
                return sdp;
            }

            if (codecName === 'vp9' && info.vp9LineNumber === info.videoCodecNumbers[0]) {
                return sdp;
            }

            if (codecName === 'h264' && info.h264LineNumber === info.videoCodecNumbers[0]) {
                return sdp;
            }

            sdp = preferCodecHelper(sdp, codecName, info);

            return sdp;
        }

        function preferCodecHelper(sdp, codec, info, ignore) {
            var preferCodecNumber = '';

            if (codec === 'vp8') {
                if (!info.vp8LineNumber) {
                    return sdp;
                }
                preferCodecNumber = info.vp8LineNumber;
            }

            if (codec === 'vp9') {
                if (!info.vp9LineNumber) {
                    return sdp;
                }
                preferCodecNumber = info.vp9LineNumber;
            }

            if (codec === 'h264') {
                if (!info.h264LineNumber) {
                    return sdp;
                }

                preferCodecNumber = info.h264LineNumber;
            }

            var newLine = info.videoCodecNumbersOriginal.split('SAVPF')[0] + 'SAVPF ';

            var newOrder = [preferCodecNumber];

            if (ignore) {
                newOrder = [];
            }

            info.videoCodecNumbers.forEach(function(codecNumber) {
                if (codecNumber === preferCodecNumber) return;
                newOrder.push(codecNumber);
            });

            newLine += newOrder.join(' ');

            sdp = sdp.replace(info.videoCodecNumbersOriginal, newLine);
            return sdp;
        }

        function splitLines(sdp) {
            var info = {};
            sdp.split('\n').forEach(function(line) {
                if (line.indexOf('m=video') === 0) {
                    info.videoCodecNumbers = [];
                    line.split('SAVPF')[1].split(' ').forEach(function(codecNumber) {
                        codecNumber = codecNumber.trim();
                        if (!codecNumber || !codecNumber.length) return;
                        info.videoCodecNumbers.push(codecNumber);
                        info.videoCodecNumbersOriginal = line;
                    });
                }

                if (line.indexOf('VP8/90000') !== -1 && !info.vp8LineNumber) {
                    info.vp8LineNumber = line.replace('a=rtpmap:', '').split(' ')[0];
                }

                if (line.indexOf('VP9/90000') !== -1 && !info.vp9LineNumber) {
                    info.vp9LineNumber = line.replace('a=rtpmap:', '').split(' ')[0];
                }

                if (line.indexOf('H264/90000') !== -1 && !info.h264LineNumber) {
                    info.h264LineNumber = line.replace('a=rtpmap:', '').split(' ')[0];
                }
            });

            return info;
        }

        function removeVPX(sdp) {
            var info = splitLines(sdp);

            // last parameter below means: ignore these codecs
            sdp = preferCodecHelper(sdp, 'vp9', info, true);
            sdp = preferCodecHelper(sdp, 'vp8', info, true);

            return sdp;
        }

        function disableNACK(sdp) {
            if (!sdp || typeof sdp !== 'string') {
                throw 'Invalid arguments.';
            }

            sdp = sdp.replace('a=rtcp-fb:126 nack\r\n', '');
            sdp = sdp.replace('a=rtcp-fb:126 nack pli\r\n', 'a=rtcp-fb:126 pli\r\n');
            sdp = sdp.replace('a=rtcp-fb:97 nack\r\n', '');
            sdp = sdp.replace('a=rtcp-fb:97 nack pli\r\n', 'a=rtcp-fb:97 pli\r\n');

            return sdp;
        }

        function prioritize(codecMimeType, peer) {
            if (!peer || !peer.getSenders || !peer.getSenders().length) {
                return;
            }

            if (!codecMimeType || typeof codecMimeType !== 'string') {
                throw 'Invalid arguments.';
            }

            peer.getSenders().forEach(function(sender) {
                var params = sender.getParameters();
                for (var i = 0; i < params.codecs.length; i++) {
                    if (params.codecs[i].mimeType == codecMimeType) {
                        params.codecs.unshift(params.codecs.splice(i, 1));
                        break;
                    }
                }
                sender.setParameters(params);
            });
        }

        function removeNonG722(sdp) {
            return sdp.replace(/m=audio ([0-9]+) RTP\/SAVPF ([0-9 ]*)/g, 'm=audio $1 RTP\/SAVPF 9');
        }

        function setBAS(sdp, bandwidth, isScreen) {
            if (!bandwidth) {
                return sdp;
            }

            if (typeof isFirefox !== 'undefined' && isFirefox) {
                return sdp;
            }

            if (isScreen) {
                if (!bandwidth.screen) {
                    console.warn('It seems that you are not using bandwidth for screen. Screen sharing is expected to fail.');
                } else if (bandwidth.screen < 300) {
                    console.warn('It seems that you are using wrong bandwidth value for screen. Screen sharing is expected to fail.');
                }
            }

            // if screen; must use at least 300kbs
            if (bandwidth.screen && isScreen) {
                sdp = sdp.replace(/b=AS([^\r\n]+\r\n)/g, '');
                sdp = sdp.replace(/a=mid:video\r\n/g, 'a=mid:video\r\nb=AS:' + bandwidth.screen + '\r\n');
            }

            // remove existing bandwidth lines
            if (bandwidth.audio || bandwidth.video) {
                sdp = sdp.replace(/b=AS([^\r\n]+\r\n)/g, '');
            }

            if (bandwidth.audio) {
                sdp = sdp.replace(/a=mid:audio\r\n/g, 'a=mid:audio\r\nb=AS:' + bandwidth.audio + '\r\n');
            }

            if (bandwidth.screen) {
                sdp = sdp.replace(/a=mid:video\r\n/g, 'a=mid:video\r\nb=AS:' + bandwidth.screen + '\r\n');
            } else if (bandwidth.video) {
                sdp = sdp.replace(/a=mid:video\r\n/g, 'a=mid:video\r\nb=AS:' + bandwidth.video + '\r\n');
            }

            return sdp;
        }

        // Find the line in sdpLines that starts with |prefix|, and, if specified,
        // contains |substr| (case-insensitive search).
        function findLine(sdpLines, prefix, substr) {
            return findLineInRange(sdpLines, 0, -1, prefix, substr);
        }

        // Find the line in sdpLines[startLine...endLine - 1] that starts with |prefix|
        // and, if specified, contains |substr| (case-insensitive search).
        function findLineInRange(sdpLines, startLine, endLine, prefix, substr) {
            var realEndLine = endLine !== -1 ? endLine : sdpLines.length;
            for (var i = startLine; i < realEndLine; ++i) {
                if (sdpLines[i].indexOf(prefix) === 0) {
                    if (!substr ||
                        sdpLines[i].toLowerCase().indexOf(substr.toLowerCase()) !== -1) {
                        return i;
                    }
                }
            }
            return null;
        }

        // Gets the codec payload type from an a=rtpmap:X line.
        function getCodecPayloadType(sdpLine) {
            var pattern = new RegExp('a=rtpmap:(\\d+) \\w+\\/\\d+');
            var result = sdpLine.match(pattern);
            return (result && result.length === 2) ? result[1] : null;
        }

        function setVideoBitrates(sdp, params) {
            params = params || {};
            var xgoogle_min_bitrate = params.min;
            var xgoogle_max_bitrate = params.max;

            var sdpLines = sdp.split('\r\n');

            // VP8
            var vp8Index = findLine(sdpLines, 'a=rtpmap', 'VP8/90000');
            var vp8Payload;
            if (vp8Index) {
                vp8Payload = getCodecPayloadType(sdpLines[vp8Index]);
            }

            if (!vp8Payload) {
                return sdp;
            }

            var rtxIndex = findLine(sdpLines, 'a=rtpmap', 'rtx/90000');
            var rtxPayload;
            if (rtxIndex) {
                rtxPayload = getCodecPayloadType(sdpLines[rtxIndex]);
            }

            if (!rtxIndex) {
                return sdp;
            }

            var rtxFmtpLineIndex = findLine(sdpLines, 'a=fmtp:' + rtxPayload.toString());
            if (rtxFmtpLineIndex !== null) {
                var appendrtxNext = '\r\n';
                appendrtxNext += 'a=fmtp:' + vp8Payload + ' x-google-min-bitrate=' + (xgoogle_min_bitrate || '228') + '; x-google-max-bitrate=' + (xgoogle_max_bitrate || '228');
                sdpLines[rtxFmtpLineIndex] = sdpLines[rtxFmtpLineIndex].concat(appendrtxNext);
                sdp = sdpLines.join('\r\n');
            }

            return sdp;
        }

        function setOpusAttributes(sdp, params) {
            params = params || {};

            var sdpLines = sdp.split('\r\n');

            // Opus
            var opusIndex = findLine(sdpLines, 'a=rtpmap', 'opus/48000');
            var opusPayload;
            if (opusIndex) {
                opusPayload = getCodecPayloadType(sdpLines[opusIndex]);
            }

            if (!opusPayload) {
                return sdp;
            }

            var opusFmtpLineIndex = findLine(sdpLines, 'a=fmtp:' + opusPayload.toString());
            if (opusFmtpLineIndex === null) {
                return sdp;
            }

            var appendOpusNext = '';
            appendOpusNext += '; stereo=' + (typeof params.stereo != 'undefined' ? params.stereo : '1');
            appendOpusNext += '; sprop-stereo=' + (typeof params['sprop-stereo'] != 'undefined' ? params['sprop-stereo'] : '1');

            if (typeof params.maxaveragebitrate != 'undefined') {
                appendOpusNext += '; maxaveragebitrate=' + (params.maxaveragebitrate || 128 * 1024 * 8);
            }

            if (typeof params.maxplaybackrate != 'undefined') {
                appendOpusNext += '; maxplaybackrate=' + (params.maxplaybackrate || 128 * 1024 * 8);
            }

            if (typeof params.cbr != 'undefined') {
                appendOpusNext += '; cbr=' + (typeof params.cbr != 'undefined' ? params.cbr : '1');
            }

            if (typeof params.useinbandfec != 'undefined') {
                appendOpusNext += '; useinbandfec=' + params.useinbandfec;
            }

            if (typeof params.usedtx != 'undefined') {
                appendOpusNext += '; usedtx=' + params.usedtx;
            }

            if (typeof params.maxptime != 'undefined') {
                appendOpusNext += '\r\na=maxptime:' + params.maxptime;
            }

            sdpLines[opusFmtpLineIndex] = sdpLines[opusFmtpLineIndex].concat(appendOpusNext);

            sdp = sdpLines.join('\r\n');
            return sdp;
        }

        // forceStereoAudio => via webrtcexample.com
        // requires getUserMedia => echoCancellation:false
        function forceStereoAudio(sdp) {
            var sdpLines = sdp.split('\r\n');
            var fmtpLineIndex = null;
            for (var i = 0; i < sdpLines.length; i++) {
                if (sdpLines[i].search('opus/48000') !== -1) {
                    var opusPayload = extractSdp(sdpLines[i], /:(\d+) opus\/48000/i);
                    break;
                }
            }
            for (var i = 0; i < sdpLines.length; i++) {
                if (sdpLines[i].search('a=fmtp') !== -1) {
                    var payload = extractSdp(sdpLines[i], /a=fmtp:(\d+)/);
                    if (payload === opusPayload) {
                        fmtpLineIndex = i;
                        break;
                    }
                }
            }
            if (fmtpLineIndex === null) return sdp;
            sdpLines[fmtpLineIndex] = sdpLines[fmtpLineIndex].concat('; stereo=1; sprop-stereo=1');
            sdp = sdpLines.join('\r\n');
            return sdp;
        }

        return {
            removeVPX: removeVPX,
            disableNACK: disableNACK,
            prioritize: prioritize,
            removeNonG722: removeNonG722,
            setApplicationSpecificBandwidth: function(sdp, bandwidth, isScreen) {
                return setBAS(sdp, bandwidth, isScreen);
            },
            setVideoBitrates: function(sdp, params) {
                return setVideoBitrates(sdp, params);
            },
            setOpusAttributes: function(sdp, params) {
                return setOpusAttributes(sdp, params);
            },
            preferVP9: function(sdp) {
                return preferCodec(sdp, 'vp9');
            },
            preferCodec: preferCodec,
            forceStereoAudio: forceStereoAudio
        };
    })();

    // backward compatibility
    window.BandwidthHandler = CodecsHandler;

    // OnIceCandidateHandler.js

    var OnIceCandidateHandler = (function() {
        function processCandidates(connection, icePair) {
            var candidate = icePair.candidate;

            var iceRestrictions = connection.candidates;
            var stun = iceRestrictions.stun;
            var turn = iceRestrictions.turn;

            if (!isNull(iceRestrictions.reflexive)) {
                stun = iceRestrictions.reflexive;
            }

            if (!isNull(iceRestrictions.relay)) {
                turn = iceRestrictions.relay;
            }

            if (!iceRestrictions.host && !!candidate.match(/typ host/g)) {
                return;
            }

            if (!turn && !!candidate.match(/typ relay/g)) {
                return;
            }

            if (!stun && !!candidate.match(/typ srflx/g)) {
                return;
            }

            var protocol = connection.iceProtocols;

            if (!protocol.udp && !!candidate.match(/ udp /g)) {
                return;
            }

            if (!protocol.tcp && !!candidate.match(/ tcp /g)) {
                return;
            }

            if (connection.enableLogs) {
                console.debug('Your candidate pairs:', candidate);
            }

            return {
                candidate: candidate,
                sdpMid: icePair.sdpMid,
                sdpMLineIndex: icePair.sdpMLineIndex
            };
        }

        return {
            processCandidates: processCandidates
        };
    })();

    // IceServersHandler.js

    var IceServersHandler = (function() {
        function getIceServers(connection) {
            // resiprocate: 3344+4433
            // pions: 7575
            var iceServers = [{
                'urls': [
                    'stun:stun.l.google.com:19302',
                    'stun:stun1.l.google.com:19302',
                    'stun:stun2.l.google.com:19302',
                    'stun:stun.l.google.com:19302?transport=udp',
                ]
            }];

            return iceServers;
        }

        return {
            getIceServers: getIceServers
        };
    })();

    // getUserMediaHandler.js

    function setStreamType(constraints, stream) {
        if (constraints.mandatory && constraints.mandatory.chromeMediaSource) {
            stream.isScreen = true;
        } else if (constraints.mozMediaSource || constraints.mediaSource) {
            stream.isScreen = true;
        } else if (constraints.video) {
            stream.isVideo = true;
        } else if (constraints.audio) {
            stream.isAudio = true;
        }
    }

    // allow users to manage this object (to support re-capturing of screen/etc.)
    window.currentUserMediaRequest = {
        streams: [],
        mutex: false,
        queueRequests: [],
        remove: function(idInstance) {
            this.mutex = false;

            var stream = this.streams[idInstance];
            if (!stream) {
                return;
            }

            stream = stream.stream;

            var options = stream.currentUserMediaRequestOptions;

            if (this.queueRequests.indexOf(options)) {
                delete this.queueRequests[this.queueRequests.indexOf(options)];
                this.queueRequests = removeNullEntries(this.queueRequests);
            }

            this.streams[idInstance].stream = null;
            delete this.streams[idInstance];
        }
    };

    function getUserMediaHandler(options) {
        if (currentUserMediaRequest.mutex === true) {
            currentUserMediaRequest.queueRequests.push(options);
            return;
        }
        currentUserMediaRequest.mutex = true;

        // easy way to match
        var idInstance = JSON.stringify(options.localMediaConstraints);

        function streaming(stream, returnBack) {
            setStreamType(options.localMediaConstraints, stream);

            var streamEndedEvent = 'ended';

            if ('oninactive' in stream) {
                streamEndedEvent = 'inactive';
            }
            stream.addEventListener(streamEndedEvent, function() {
                delete currentUserMediaRequest.streams[idInstance];

                currentUserMediaRequest.mutex = false;
                if (currentUserMediaRequest.queueRequests.indexOf(options)) {
                    delete currentUserMediaRequest.queueRequests[currentUserMediaRequest.queueRequests.indexOf(options)];
                    currentUserMediaRequest.queueRequests = removeNullEntries(currentUserMediaRequest.queueRequests);
                }
            }, false);

            currentUserMediaRequest.streams[idInstance] = {
                stream: stream
            };
            currentUserMediaRequest.mutex = false;

            if (currentUserMediaRequest.queueRequests.length) {
                getUserMediaHandler(currentUserMediaRequest.queueRequests.shift());
            }

            // callback
            options.onGettingLocalMedia(stream, returnBack);
        }

        if (currentUserMediaRequest.streams[idInstance]) {
            streaming(currentUserMediaRequest.streams[idInstance].stream, true);
        } else {
            var isBlackBerry = !!(/BB10|BlackBerry/i.test(navigator.userAgent || ''));
            if (isBlackBerry || typeof navigator.mediaDevices === 'undefined' || typeof navigator.mediaDevices.getUserMedia !== 'function') {
                navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
                navigator.getUserMedia(options.localMediaConstraints, function(stream) {
                    stream.streamid = stream.streamid || stream.id || getRandomString();
                    stream.idInstance = idInstance;
                    streaming(stream);
                }, function(error) {
                    options.onLocalMediaError(error, options.localMediaConstraints);
                });
                return;
            }

            if (typeof navigator.mediaDevices === 'undefined') {
                navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
                var getUserMediaSuccess = function() {};
                var getUserMediaFailure = function() {};

                var getUserMediaStream, getUserMediaError;
                navigator.mediaDevices = {
                    getUserMedia: function(hints) {
                        navigator.getUserMedia(hints, function(getUserMediaSuccess) {
                            getUserMediaSuccess(stream);
                            getUserMediaStream = stream;
                        }, function(error) {
                            getUserMediaFailure(error);
                            getUserMediaError = error;
                        });

                        return {
                            then: function(successCB) {
                                if (getUserMediaStream) {
                                    successCB(getUserMediaStream);
                                    return;
                                }

                                getUserMediaSuccess = successCB;

                                return {
                                    then: function(failureCB) {
                                        if (getUserMediaError) {
                                            failureCB(getUserMediaError);
                                            return;
                                        }

                                        getUserMediaFailure = failureCB;
                                    }
                                }
                            }
                        }
                    }
                };
            }

            if (options.localMediaConstraints.isScreen === true) {
                if (navigator.mediaDevices.getDisplayMedia) {
                    navigator.mediaDevices.getDisplayMedia(options.localMediaConstraints).then(function(stream) {
                        stream.streamid = stream.streamid || stream.id || getRandomString();
                        stream.idInstance = idInstance;

                        streaming(stream);
                    }).catch(function(error) {
                        options.onLocalMediaError(error, options.localMediaConstraints);
                    });
                } else if (navigator.getDisplayMedia) {
                    navigator.getDisplayMedia(options.localMediaConstraints).then(function(stream) {
                        stream.streamid = stream.streamid || stream.id || getRandomString();
                        stream.idInstance = idInstance;

                        streaming(stream);
                    }).catch(function(error) {
                        options.onLocalMediaError(error, options.localMediaConstraints);
                    });
                } else {
                    throw new Error('getDisplayMedia API is not availabe in this browser.');
                }
                return;
            }

            navigator.mediaDevices.getUserMedia(options.localMediaConstraints).then(function(stream) {
                stream.streamid = stream.streamid || stream.id || getRandomString();
                stream.idInstance = idInstance;

                streaming(stream);
            }).catch(function(error) {
                options.onLocalMediaError(error, options.localMediaConstraints);
            });
        }
    }

    // StreamsHandler.js

    var StreamsHandler = (function() {
        function handleType(type) {
            if (!type) {
                return;
            }

            if (typeof type === 'string' || typeof type === 'undefined') {
                return type;
            }

            if (type.audio && type.video) {
                return null;
            }

            if (type.audio) {
                return 'audio';
            }

            if (type.video) {
                return 'video';
            }

            return;
        }

        function setHandlers(stream, syncAction, connection) {
            if (!stream || !stream.addEventListener) return;

            if (typeof syncAction == 'undefined' || syncAction == true) {
                var streamEndedEvent = 'ended';

                if ('oninactive' in stream) {
                    streamEndedEvent = 'inactive';
                }

                stream.addEventListener(streamEndedEvent, function() {
                    StreamsHandler.onSyncNeeded(this.streamid, streamEndedEvent);
                }, false);
            }

            stream.mute = function(type, isSyncAction) {
                type = handleType(type);

                if (typeof isSyncAction !== 'undefined') {
                    syncAction = isSyncAction;
                }

                if (typeof type == 'undefined' || type == 'audio') {
                    getTracks(stream, 'audio').forEach(function(track) {
                        track.enabled = false;
                        connection.streamEvents[stream.streamid].isAudioMuted = true;
                    });
                }

                if (typeof type == 'undefined' || type == 'video') {
                    getTracks(stream, 'video').forEach(function(track) {
                        track.enabled = false;
                    });
                }

                if (typeof syncAction == 'undefined' || syncAction == true) {
                    StreamsHandler.onSyncNeeded(stream.streamid, 'mute', type);
                }

                connection.streamEvents[stream.streamid].muteType = type || 'both';

                fireEvent(stream, 'mute', type);
            };

            stream.unmute = function(type, isSyncAction) {
                type = handleType(type);

                if (typeof isSyncAction !== 'undefined') {
                    syncAction = isSyncAction;
                }

                graduallyIncreaseVolume();

                if (typeof type == 'undefined' || type == 'audio') {
                    getTracks(stream, 'audio').forEach(function(track) {
                        track.enabled = true;
                        connection.streamEvents[stream.streamid].isAudioMuted = false;
                    });
                }

                if (typeof type == 'undefined' || type == 'video') {
                    getTracks(stream, 'video').forEach(function(track) {
                        track.enabled = true;
                    });

                    // make sure that video unmute doesn't affects audio
                    if (typeof type !== 'undefined' && type == 'video' && connection.streamEvents[stream.streamid].isAudioMuted) {
                        (function looper(times) {
                            if (!times) {
                                times = 0;
                            }

                            times++;

                            // check until five-seconds
                            if (times < 100 && connection.streamEvents[stream.streamid].isAudioMuted) {
                                stream.mute('audio');

                                setTimeout(function() {
                                    looper(times);
                                }, 50);
                            }
                        })();
                    }
                }

                if (typeof syncAction == 'undefined' || syncAction == true) {
                    StreamsHandler.onSyncNeeded(stream.streamid, 'unmute', type);
                }

                connection.streamEvents[stream.streamid].unmuteType = type || 'both';

                fireEvent(stream, 'unmute', type);
            };

            function graduallyIncreaseVolume() {
                if (!connection.streamEvents[stream.streamid].mediaElement) {
                    return;
                }

                var mediaElement = connection.streamEvents[stream.streamid].mediaElement;
                mediaElement.volume = 0;
                afterEach(200, 5, function() {
                    try {
                        mediaElement.volume += .20;
                    } catch (e) {
                        mediaElement.volume = 1;
                    }
                });
            }
        }

        function afterEach(setTimeoutInteval, numberOfTimes, callback, startedTimes) {
            startedTimes = (startedTimes || 0) + 1;
            if (startedTimes >= numberOfTimes) return;

            setTimeout(function() {
                callback();
                afterEach(setTimeoutInteval, numberOfTimes, callback, startedTimes);
            }, setTimeoutInteval);
        }

        return {
            setHandlers: setHandlers,
            onSyncNeeded: function(streamid, action, type) {}
        };
    })();

    // TextReceiver.js & TextSender.js

    function TextReceiver(connection) {
        var content = {};

        function receive(data, userid, extra) {
            // uuid is used to uniquely identify sending instance
            var uuid = data.uuid;
            if (!content[uuid]) {
                content[uuid] = [];
            }

            content[uuid].push(data.message);

            if (data.last) {
                var message = content[uuid].join('');
                if (data.isobject) {
                    message = JSON.parse(message);
                }

                // latency detection
                var receivingTime = new Date().getTime();
                var latency = receivingTime - data.sendingTime;

                var e = {
                    data: message,
                    userid: userid,
                    extra: extra,
                    latency: latency
                };

                if (connection.autoTranslateText) {
                    e.original = e.data;
                    connection.Translator.TranslateText(e.data, function(translatedText) {
                        e.data = translatedText;
                        connection.onmessage(e);
                    });
                } else {
                    connection.onmessage(e);
                }

                delete content[uuid];
            }
        }

        return {
            receive: receive
        };
    }

    // TextSender.js
    var TextSender = {
        send: function(config) {
            var connection = config.connection;

            var channel = config.channel,
                remoteUserId = config.remoteUserId,
                initialText = config.text,
                packetSize = connection.chunkSize || 1000,
                textToTransfer = '',
                isobject = false;

            if (!isString(initialText)) {
                isobject = true;
                initialText = JSON.stringify(initialText);
            }

            // uuid is used to uniquely identify sending instance
            var uuid = getRandomString();
            var sendingTime = new Date().getTime();

            sendText(initialText);

            function sendText(textMessage, text) {
                var data = {
                    type: 'text',
                    uuid: uuid,
                    sendingTime: sendingTime
                };

                if (textMessage) {
                    text = textMessage;
                    data.packets = parseInt(text.length / packetSize);
                }

                if (text.length > packetSize) {
                    data.message = text.slice(0, packetSize);
                } else {
                    data.message = text;
                    data.last = true;
                    data.isobject = isobject;
                }

                channel.send(data, remoteUserId);

                textToTransfer = text.slice(data.message.length);

                if (textToTransfer.length) {
                    setTimeout(function() {
                        sendText(null, textToTransfer);
                    }, connection.chunkInterval || 100);
                }
            }
        }
    };

    // FileProgressBarHandler.js

    var FileProgressBarHandler = (function() {
        function handle(connection) {
            var progressHelper = {};

            connection.onFileStart = function(file) {
                var div = document.createElement('div');
                div.title = file.name;
                div.innerHTML = '<label>0%</label> <progress></progress>';

                if (file.remoteUserId) {
                    div.innerHTML += ' (Sharing with:' + file.remoteUserId + ')';
                }

                if (!connection.filesContainer) {
                    connection.filesContainer = document.body || document.documentElement;
                }

                connection.filesContainer.insertBefore(div, connection.filesContainer.firstChild);

                if (!file.remoteUserId) {
                    progressHelper[file.uuid] = {
                        div: div,
                        progress: div.querySelector('progress'),
                        label: div.querySelector('label')
                    };
                    progressHelper[file.uuid].progress.max = file.maxChunks;
                    return;
                }

                if (!progressHelper[file.uuid]) {
                    progressHelper[file.uuid] = {};
                }

                progressHelper[file.uuid][file.remoteUserId] = {
                    div: div,
                    progress: div.querySelector('progress'),
                    label: div.querySelector('label')
                };
                progressHelper[file.uuid][file.remoteUserId].progress.max = file.maxChunks;
            };

            connection.onFileProgress = function(chunk) {
                var helper = progressHelper[chunk.uuid];
                if (!helper) {
                    return;
                }
                if (chunk.remoteUserId) {
                    helper = progressHelper[chunk.uuid][chunk.remoteUserId];
                    if (!helper) {
                        return;
                    }
                }

                helper.progress.value = chunk.currentPosition || chunk.maxChunks || helper.progress.max;
                updateLabel(helper.progress, helper.label);
            };

            connection.onFileEnd = function(file) {
                var helper = progressHelper[file.uuid];
                if (!helper) {
                    console.error('No such progress-helper element exist.', file);
                    return;
                }

                if (file.remoteUserId) {
                    helper = progressHelper[file.uuid][file.remoteUserId];
                    if (!helper) {
                        return;
                    }
                }

                var div = helper.div;
                if (file.type.indexOf('image') != -1) {
                    div.innerHTML = '<a href="' + file.url + '" download="' + file.name + '">Download <strong style="color:red;">' + file.name + '</strong> </a><br /><img src="' + file.url + '" title="' + file.name + '" style="max-width: 80%;">';
                } else {
                    div.innerHTML = '<a href="' + file.url + '" download="' + file.name + '">Download <strong style="color:red;">' + file.name + '</strong> </a><br /><iframe src="' + file.url + '" title="' + file.name + '" style="width: 80%;border: 0;height: inherit;margin-top:1em;"></iframe>';
                }
            };

            function updateLabel(progress, label) {
                if (progress.position === -1) {
                    return;
                }

                var position = +progress.position.toFixed(2).split('.')[1] || 100;
                label.innerHTML = position + '%';
            }
        }

        return {
            handle: handle
        };
    })();

    // TranslationHandler.js

    var TranslationHandler = (function() {
        function handle(connection) {
            connection.autoTranslateText = false;
            connection.language = 'en';
            connection.googKey = 'AIzaSyCgB5hmFY74WYB-EoWkhr9cAGr6TiTHrEE';

            connection.Translator = {
                TranslateText: function(text, callback) {
                    // if(location.protocol === 'https:') return callback(text);

                    var newScript = document.createElement('script');
                    newScript.type = 'text/javascript';

                    var sourceText = encodeURIComponent(text); // escape

                    var randomNumber = 'method' + connection.token();
                    window[randomNumber] = function(response) {
                        if (response.data && response.data.translations[0] && callback) {
                            callback(response.data.translations[0].translatedText);
                            return;
                        }

                        if (response.error && response.error.message === 'Daily Limit Exceeded') {
                            console.error('Text translation failed. Error message: "Daily Limit Exceeded."');
                            return;
                        }

                        if (response.error) {
                            console.error(response.error.message);
                            return;
                        }

                        console.error(response);
                    };

                    var source = 'https://www.googleapis.com/language/translate/v2?key=' + connection.googKey + '&target=' + (connection.language || 'en-US') + '&callback=window.' + randomNumber + '&q=' + sourceText;
                    newScript.src = source;
                    document.getElementsByTagName('head')[0].appendChild(newScript);
                },
                getListOfLanguages: function(callback) {
                    var xhr = new XMLHttpRequest();
                    xhr.onreadystatechange = function() {
                        if (xhr.readyState == XMLHttpRequest.DONE) {
                            var response = JSON.parse(xhr.responseText);

                            if (response && response.data && response.data.languages) {
                                callback(response.data.languages);
                                return;
                            }

                            if (response.error && response.error.message === 'Daily Limit Exceeded') {
                                console.error('Text translation failed. Error message: "Daily Limit Exceeded."');
                                return;
                            }

                            if (response.error) {
                                console.error(response.error.message);
                                return;
                            }

                            console.error(response);
                        }
                    }
                    var url = 'https://www.googleapis.com/language/translate/v2/languages?key=' + connection.googKey + '&target=en';
                    xhr.open('GET', url, true);
                    xhr.send(null);
                }
            };
        }

        return {
            handle: handle
        };
    })();

    // _____________________
    // RTCMultiConnection.js

    (function(connection) {
        forceOptions = forceOptions || {
            useDefaultDevices: true
        };

        connection.channel = connection.sessionid = roomid;

        var mPeer = new MultiPeers(connection);

        var preventDuplicateOnStreamEvents = {};
        mPeer.onGettingLocalMedia = function(stream, callback) {
            callback = callback || function() {};

            if (preventDuplicateOnStreamEvents[stream.streamid]) {
                callback();
                return;
            }
            preventDuplicateOnStreamEvents[stream.streamid] = true;

            try {
                stream.type = 'local';
            } catch (e) {}

            connection.setStreamEndHandler(stream);

            getRMCMediaElement(stream, function(mediaElement) {
                mediaElement.id = stream.streamid;
                mediaElement.muted = true;
                mediaElement.volume = 0;

                if (connection.attachStreams.indexOf(stream) === -1) {
                    connection.attachStreams.push(stream);
                }

                if (typeof StreamsHandler !== 'undefined') {
                    StreamsHandler.setHandlers(stream, true, connection);
                }

                connection.streamEvents[stream.streamid] = {
                    stream: stream,
                    type: 'local',
                    mediaElement: mediaElement,
                    userid: connection.userid,
                    extra: connection.extra,
                    streamid: stream.streamid,
                    isAudioMuted: true
                };

                try {
                    setHarkEvents(connection, connection.streamEvents[stream.streamid]);
                    setMuteHandlers(connection, connection.streamEvents[stream.streamid]);

                    connection.onstream(connection.streamEvents[stream.streamid]);
                } catch (e) {
                    //
                }

                callback();
            }, connection);
        };

        mPeer.onGettingRemoteMedia = function(stream, remoteUserId) {
            try {
                stream.type = 'remote';
            } catch (e) {}

            connection.setStreamEndHandler(stream, 'remote-stream');

            getRMCMediaElement(stream, function(mediaElement) {
                mediaElement.id = stream.streamid;

                if (typeof StreamsHandler !== 'undefined') {
                    StreamsHandler.setHandlers(stream, false, connection);
                }

                connection.streamEvents[stream.streamid] = {
                    stream: stream,
                    type: 'remote',
                    userid: remoteUserId,
                    extra: connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {},
                    mediaElement: mediaElement,
                    streamid: stream.streamid
                };

                setMuteHandlers(connection, connection.streamEvents[stream.streamid]);

                connection.onstream(connection.streamEvents[stream.streamid]);
            }, connection);
        };

        mPeer.onRemovingRemoteMedia = function(stream, remoteUserId) {
            var streamEvent = connection.streamEvents[stream.streamid];
            if (!streamEvent) {
                streamEvent = {
                    stream: stream,
                    type: 'remote',
                    userid: remoteUserId,
                    extra: connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {},
                    streamid: stream.streamid,
                    mediaElement: connection.streamEvents[stream.streamid] ? connection.streamEvents[stream.streamid].mediaElement : null
                };
            }

            if (connection.peersBackup[streamEvent.userid]) {
                streamEvent.extra = connection.peersBackup[streamEvent.userid].extra;
            }

            connection.onstreamended(streamEvent);

            delete connection.streamEvents[stream.streamid];
        };

        mPeer.onNegotiationNeeded = function(message, remoteUserId, callback) {
            callback = callback || function() {};

            remoteUserId = remoteUserId || message.remoteUserId;
            message = message || '';

            // usually a message looks like this
            var messageToDeliver = {
                remoteUserId: remoteUserId,
                message: message,
                sender: connection.userid
            };

            if (message.remoteUserId && message.message && message.sender) {
                // if a code is manually passing required data
                messageToDeliver = message;
            }

            connectSocket(function() {
                connection.socket.emit(connection.socketMessageEvent, messageToDeliver, callback);
            });
        };

        function onUserLeft(remoteUserId) {
            connection.deletePeer(remoteUserId);
        }

        mPeer.onUserLeft = onUserLeft;
        mPeer.disconnectWith = function(remoteUserId, callback) {
            if (connection.socket) {
                connection.socket.emit('disconnect-with', remoteUserId, callback || function() {});
            }

            connection.deletePeer(remoteUserId);
        };

        connection.socketOptions = {
            // 'force new connection': true, // For SocketIO version < 1.0
            // 'forceNew': true, // For SocketIO version >= 1.0
            'transport': 'polling' // fixing transport:unknown issues
        };

        function connectSocket(connectCallback) {
            connection.socketAutoReConnect = true;

            if (connection.socket) { // todo: check here readySate/etc. to make sure socket is still opened
                if (connectCallback) {
                    connectCallback(connection.socket);
                }
                return;
            }

            if (typeof SocketConnection === 'undefined') {
                if (typeof FirebaseConnection !== 'undefined') {
                    window.SocketConnection = FirebaseConnection;
                } else if (typeof PubNubConnection !== 'undefined') {
                    window.SocketConnection = PubNubConnection;
                } else {
                    throw 'SocketConnection.js seems missed.';
                }
            }

            new SocketConnection(connection, function(s) {
                if (connectCallback) {
                    connectCallback(connection.socket);
                }
            });
        }

        // 1st paramter is roomid
        // 2rd paramter is a callback function
        connection.openOrJoin = function(roomid, callback) {
            callback = callback || function() {};

            connection.checkPresence(roomid, function(isRoomExist, roomid) {
                if (isRoomExist) {
                    connection.sessionid = roomid;

                    var localPeerSdpConstraints = false;
                    var remotePeerSdpConstraints = false;
                    var isOneWay = !!connection.session.oneway;
                    var isDataOnly = isData(connection.session);

                    remotePeerSdpConstraints = {
                        OfferToReceiveAudio: connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    }

                    localPeerSdpConstraints = {
                        OfferToReceiveAudio: isOneWay ? !!connection.session.audio : connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                        OfferToReceiveVideo: isOneWay ? !!connection.session.video || !!connection.session.screen : connection.sdpConstraints.mandatory.OfferToReceiveVideo
                    }

                    var connectionDescription = {
                        remoteUserId: connection.sessionid,
                        message: {
                            newParticipationRequest: true,
                            isOneWay: isOneWay,
                            isDataOnly: isDataOnly,
                            localPeerSdpConstraints: localPeerSdpConstraints,
                            remotePeerSdpConstraints: remotePeerSdpConstraints
                        },
                        sender: connection.userid
                    };

                    beforeJoin(connectionDescription.message, function() {
                        joinRoom(connectionDescription, callback);
                    });
                    return;
                }

                connection.waitingForLocalMedia = true;
                connection.isInitiator = true;

                connection.sessionid = roomid || connection.sessionid;

                if (isData(connection.session)) {
                    openRoom(callback);
                    return;
                }

                connection.captureUserMedia(function() {
                    openRoom(callback);
                });
            });
        };

        // don't allow someone to join this person until he has the media
        connection.waitingForLocalMedia = false;

        connection.open = function(roomid, callback) {
            callback = callback || function() {};

            connection.waitingForLocalMedia = true;
            connection.isInitiator = true;

            connection.sessionid = roomid || connection.sessionid;

            connectSocket(function() {
                if (isData(connection.session)) {
                    openRoom(callback);
                    return;
                }

                connection.captureUserMedia(function() {
                    openRoom(callback);
                });
            });
        };

        // this object keeps extra-data records for all connected users
        // this object is never cleared so you can always access extra-data even if a user left
        connection.peersBackup = {};

        connection.deletePeer = function(remoteUserId) {
            if (!remoteUserId || !connection.peers[remoteUserId]) {
                return;
            }

            var eventObject = {
                userid: remoteUserId,
                extra: connection.peers[remoteUserId] ? connection.peers[remoteUserId].extra : {}
            };

            if (connection.peersBackup[eventObject.userid]) {
                eventObject.extra = connection.peersBackup[eventObject.userid].extra;
            }

            connection.onleave(eventObject);

            if (!!connection.peers[remoteUserId]) {
                connection.peers[remoteUserId].streams.forEach(function(stream) {
                    stream.stop();
                });

                var peer = connection.peers[remoteUserId].peer;
                if (peer && peer.iceConnectionState !== 'closed') {
                    try {
                       // peer.close();
                    } catch (e) {}
                }

                if (connection.peers[remoteUserId]) {
                    connection.peers[remoteUserId].peer = null;
                    delete connection.peers[remoteUserId];
                }
            }
        }

        connection.rejoin = function(connectionDescription) {
            if (connection.isInitiator || !connectionDescription || !Object.keys(connectionDescription).length) {
                return;
            }

            var extra = {};

            if (connection.peers[connectionDescription.remoteUserId]) {
                extra = connection.peers[connectionDescription.remoteUserId].extra;
                connection.deletePeer(connectionDescription.remoteUserId);
            }

            if (connectionDescription && connectionDescription.remoteUserId) {
                connection.join(connectionDescription.remoteUserId);

                connection.onReConnecting({
                    userid: connectionDescription.remoteUserId,
                    extra: extra
                });
            }
        };

        connection.join = function(remoteUserId, options) {
            connection.sessionid = (remoteUserId ? remoteUserId.sessionid || remoteUserId.remoteUserId || remoteUserId : false) || connection.sessionid;
            connection.sessionid += '';

            var localPeerSdpConstraints = false;
            var remotePeerSdpConstraints = false;
            var isOneWay = false;
            var isDataOnly = false;

            if ((remoteUserId && remoteUserId.session) || !remoteUserId || typeof remoteUserId === 'string') {
                var session = remoteUserId ? remoteUserId.session || connection.session : connection.session;

                isOneWay = !!session.oneway;
                isDataOnly = isData(session);

                remotePeerSdpConstraints = {
                    OfferToReceiveAudio: connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                    OfferToReceiveVideo: connection.sdpConstraints.mandatory.OfferToReceiveVideo
                };

                localPeerSdpConstraints = {
                    OfferToReceiveAudio: isOneWay ? !!connection.session.audio : connection.sdpConstraints.mandatory.OfferToReceiveAudio,
                    OfferToReceiveVideo: isOneWay ? !!connection.session.video || !!connection.session.screen : connection.sdpConstraints.mandatory.OfferToReceiveVideo
                };
            }

            options = options || {};

            var cb = function() {};
            if (typeof options === 'function') {
                cb = options;
                options = {};
            }

            if (typeof options.localPeerSdpConstraints !== 'undefined') {
                localPeerSdpConstraints = options.localPeerSdpConstraints;
            }

            if (typeof options.remotePeerSdpConstraints !== 'undefined') {
                remotePeerSdpConstraints = options.remotePeerSdpConstraints;
            }

            if (typeof options.isOneWay !== 'undefined') {
                isOneWay = options.isOneWay;
            }

            if (typeof options.isDataOnly !== 'undefined') {
                isDataOnly = options.isDataOnly;
            }

            var connectionDescription = {
                remoteUserId: connection.sessionid,
                message: {
                    newParticipationRequest: true,
                    isOneWay: isOneWay,
                    isDataOnly: isDataOnly,
                    localPeerSdpConstraints: localPeerSdpConstraints,
                    remotePeerSdpConstraints: remotePeerSdpConstraints
                },
                sender: connection.userid
            };

            beforeJoin(connectionDescription.message, function() {
                connectSocket(function() {
                    joinRoom(connectionDescription, cb);
                });
            });
            return connectionDescription;
        };

        function joinRoom(connectionDescription, cb) {
            connection.socket.emit('join-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            }, function(isRoomJoined, error) {
                if (isRoomJoined === true) {
                    if (connection.enableLogs) {
                        console.log('isRoomJoined: ', isRoomJoined, ' roomid: ', connection.sessionid);
                    }

                    if (!!connection.peers[connection.sessionid]) {
                        // on socket disconnect & reconnect
                        return;
                    }

                    mPeer.onNegotiationNeeded(connectionDescription);
                }

                if (isRoomJoined === false) {
                    if (connection.enableLogs) {
                        console.warn('isRoomJoined: ', error, ' roomid: ', connection.sessionid);
                    }

                    // [disabled] retry after 3 seconds
                    false && setTimeout(function() {
                        joinRoom(connectionDescription, cb);
                    }, 3000);
                }

                cb(isRoomJoined, connection.sessionid, error);
            });
        }

        connection.publicRoomIdentifier = '';

        function openRoom(callback) {
            if (connection.enableLogs) {
                console.log('Sending open-room signal to socket.io');
            }

            connection.waitingForLocalMedia = false;
            connection.socket.emit('open-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                identifier: connection.publicRoomIdentifier,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            }, function(isRoomOpened, error) {
                if (isRoomOpened === true) {
                    if (connection.enableLogs) {
                        console.log('isRoomOpened: ', isRoomOpened, ' roomid: ', connection.sessionid);
                    }
                    callback(isRoomOpened, connection.sessionid);
                }

                if (isRoomOpened === false) {
                    if (connection.enableLogs) {
                        console.warn('isRoomOpened: ', error, ' roomid: ', connection.sessionid);
                    }

                    callback(isRoomOpened, connection.sessionid, error);
                }
            });
        }

        function getStreamInfoForAdmin() {
            try {
                return connection.streamEvents.selectAll('local').map(function(event) {
                    return {
                        streamid: event.streamid,
                        tracks: event.stream.getTracks().length
                    };
                });
            } catch (e) {
                return [];
            }
        }

        function beforeJoin(userPreferences, callback) {
            if (connection.dontCaptureUserMedia || userPreferences.isDataOnly) {
                callback();
                return;
            }

            var localMediaConstraints = {};

            if (userPreferences.localPeerSdpConstraints.OfferToReceiveAudio) {
                localMediaConstraints.audio = connection.mediaConstraints.audio;
            }

            if (userPreferences.localPeerSdpConstraints.OfferToReceiveVideo) {
                localMediaConstraints.video = connection.mediaConstraints.video;
            }

            var session = userPreferences.session || connection.session;

            if (session.oneway && session.audio !== 'two-way' && session.video !== 'two-way' && session.screen !== 'two-way') {
                callback();
                return;
            }

            if (session.oneway && session.audio && session.audio === 'two-way') {
                session = {
                    audio: true
                };
            }

            if (session.audio || session.video || session.screen) {
                if (session.screen) {
                    if (DetectRTC.browser.name === 'Edge') {
                        navigator.getDisplayMedia({
                            video: true,
                            audio: isAudioPlusTab(connection)
                        }).then(function(screen) {
                            screen.isScreen = true;
                            mPeer.onGettingLocalMedia(screen);

                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                connection.invokeGetUserMedia(null, callback);
                            } else {
                                callback(screen);
                            }
                        }, function(error) {
                            console.error('Unable to capture screen on Edge. HTTPs and version 17+ is required.');
                        });
                    } else {
                        connection.invokeGetUserMedia({
                            audio: isAudioPlusTab(connection),
                            video: true,
                            isScreen: true
                        }, (session.audio || session.video) && !isAudioPlusTab(connection) ? connection.invokeGetUserMedia(null, callback) : callback);
                    }
                } else if (session.audio || session.video) {
                    connection.invokeGetUserMedia(null, callback, session);
                }
            }
        }

        connection.getUserMedia = connection.captureUserMedia = function(callback, sessionForced) {
            callback = callback || function() {};
            var session = sessionForced || connection.session;

            if (connection.dontCaptureUserMedia || isData(session)) {
                callback();
                return;
            }

            if (session.audio || session.video || session.screen) {
                if (session.screen) {
                    if (DetectRTC.browser.name === 'Edge') {
                        navigator.getDisplayMedia({
                            video: true,
                            audio: isAudioPlusTab(connection)
                        }).then(function(screen) {
                            screen.isScreen = true;
                            mPeer.onGettingLocalMedia(screen);

                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                var nonScreenSession = {};
                                for (var s in session) {
                                    if (s !== 'screen') {
                                        nonScreenSession[s] = session[s];
                                    }
                                }
                                connection.invokeGetUserMedia(sessionForced, callback, nonScreenSession);
                                return;
                            }
                            callback(screen);
                        }, function(error) {
                            console.error('Unable to capture screen on Edge. HTTPs and version 17+ is required.');
                        });
                    } else {
                        connection.invokeGetUserMedia({
                            audio: isAudioPlusTab(connection),
                            video: true,
                            isScreen: true
                        }, function(stream) {
                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                var nonScreenSession = {};
                                for (var s in session) {
                                    if (s !== 'screen') {
                                        nonScreenSession[s] = session[s];
                                    }
                                }
                                connection.invokeGetUserMedia(sessionForced, callback, nonScreenSession);
                                return;
                            }
                            callback(stream);
                        });
                    }
                } else if (session.audio || session.video) {
                    connection.invokeGetUserMedia(sessionForced, callback, session);
                }
            }
        };

        connection.onbeforeunload = function(arg1, dontCloseSocket) {
            if (!connection.closeBeforeUnload) {
                return;
            }

            connection.peers.getAllParticipants().forEach(function(participant) {
                mPeer.onNegotiationNeeded({
                    userLeft: true
                }, participant);

                if (connection.peers[participant] && connection.peers[participant].peer) {
                   connection.peers[participant].peer.close();
                }

                delete connection.peers[participant];
            });

            if (!dontCloseSocket) {
               // connection.closeSocket();
            }

            connection.isInitiator = false;
        };

        if (!window.ignoreBeforeUnload) {
            // user can implement its own version of window.onbeforeunload
            connection.closeBeforeUnload = true;
            window.addEventListener('beforeunload', connection.onbeforeunload, false);
        } else {
            connection.closeBeforeUnload = false;
        }

        connection.userid = getRandomString();
        connection.changeUserId = function(newUserId, callback) {
            callback = callback || function() {};
           // connection.userid = newUserId;
            connection.socket.emit('changed-uuid', connection.userid, callback);
        };

        connection.extra = {};
        connection.attachStreams = [];

        connection.session = {
            audio: true,
            video: true
        };

        connection.enableFileSharing = false;

        // all values in kbps
        connection.bandwidth = {
            screen: false,
            audio: false,
            video: false
        };

        connection.codecs = {
            audio: 'opus',
            video: 'VP9'
        };

        connection.processSdp = function(sdp) {
            // ignore SDP modification if unified-pan is supported
            if (isUnifiedPlanSupportedDefault()) {
                return sdp;
            }

            if (DetectRTC.browser.name === 'Safari') {
                return sdp;
            }

            if (connection.codecs.video.toUpperCase() === 'VP8') {
                sdp = CodecsHandler.preferCodec(sdp, 'vp8');
            }

            if (connection.codecs.video.toUpperCase() === 'VP9') {
                sdp = CodecsHandler.preferCodec(sdp, 'vp9');
            }

            if (connection.codecs.video.toUpperCase() === 'H264') {
                sdp = CodecsHandler.preferCodec(sdp, 'h264');
            }

            if (connection.codecs.audio === 'G722') {
                sdp = CodecsHandler.removeNonG722(sdp);
            }

            if (DetectRTC.browser.name === 'Firefox') {
                return sdp;
            }

            if (connection.bandwidth.video || connection.bandwidth.screen) {
                sdp = CodecsHandler.setApplicationSpecificBandwidth(sdp, connection.bandwidth, !!connection.session.screen);
            }

            if (connection.bandwidth.video) {
                sdp = CodecsHandler.setVideoBitrates(sdp, {
                    min: connection.bandwidth.video * 8 * 1024,
                    max: connection.bandwidth.video * 8 * 1024
                });
            }

            if (connection.bandwidth.audio) {
                sdp = CodecsHandler.setOpusAttributes(sdp, {
                    maxaveragebitrate: connection.bandwidth.audio * 8 * 1024,
                    maxplaybackrate: connection.bandwidth.audio * 8 * 1024,
                    stereo: 1,
                  //  maxptime: 3
                });
            }

            return sdp;
        };

        if (typeof CodecsHandler !== 'undefined') {
            connection.BandwidthHandler = connection.CodecsHandler = CodecsHandler;
        }

        connection.mediaConstraints = {
            audio: {
                mandatory: {},
                optional: connection.bandwidth.audio ? [{
                    bandwidth: connection.bandwidth.audio * 8 * 1024 || 128 * 8 * 1024
                }] : []
            },
            video: {
                mandatory: {},
                optional: connection.bandwidth.video ? [{
                    bandwidth: connection.bandwidth.video * 8 * 1024 || 128 * 8 * 1024
                }, {
                    facingMode: 'user'
                }] : [{
                    facingMode: 'user'
                }]
            }
        };

        if (DetectRTC.browser.name === 'Firefox') {
            connection.mediaConstraints = {
                audio: true,
                video: true
            };
        }

        if (!forceOptions.useDefaultDevices && !DetectRTC.isMobileDevice) {
            DetectRTC.load(function() {
                var lastAudioDevice, lastVideoDevice;
                // it will force RTCMultiConnection to capture last-devices
                // i.e. if external microphone is attached to system, we should prefer it over built-in devices.
                DetectRTC.MediaDevices.forEach(function(device) {
                    if (device.kind === 'audioinput' && connection.mediaConstraints.audio !== false) {
                        lastAudioDevice = device;
                    }

                    if (device.kind === 'videoinput' && connection.mediaConstraints.video !== false) {
                        lastVideoDevice = device;
                    }
                });

                if (lastAudioDevice) {
                    if (DetectRTC.browser.name === 'Firefox') {
                        if (connection.mediaConstraints.audio !== true) {
                            connection.mediaConstraints.audio.deviceId = lastAudioDevice.id;
                        } else {
                            connection.mediaConstraints.audio = {
                                deviceId: lastAudioDevice.id
                            }
                        }
                        return;
                    }

                    if (connection.mediaConstraints.audio == true) {
                        connection.mediaConstraints.audio = {
                            mandatory: {},
                            optional: []
                        }
                    }

                    if (!connection.mediaConstraints.audio.optional) {
                        connection.mediaConstraints.audio.optional = [];
                    }

                    var optional = [{
                        sourceId: lastAudioDevice.id
                    }];

                    connection.mediaConstraints.audio.optional = optional.concat(connection.mediaConstraints.audio.optional);
                }

                if (lastVideoDevice) {
                    if (DetectRTC.browser.name === 'Firefox') {
                        if (connection.mediaConstraints.video !== true) {
                            connection.mediaConstraints.video.deviceId = lastVideoDevice.id;
                        } else {
                            connection.mediaConstraints.video = {
                                deviceId: lastVideoDevice.id
                            }
                        }
                        return;
                    }

                    if (connection.mediaConstraints.video == true) {
                        connection.mediaConstraints.video = {
                            mandatory: {},
                            optional: []
                        }
                    }

                    if (!connection.mediaConstraints.video.optional) {
                        connection.mediaConstraints.video.optional = [];
                    }

                    var optional = [{
                        sourceId: lastVideoDevice.id
                    }];

                    connection.mediaConstraints.video.optional = optional.concat(connection.mediaConstraints.video.optional);
                }
            });
        }

        connection.sdpConstraints = {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: true
            },
            optional: [{
                VoiceActivityDetection: false
            }]
        };

        connection.sdpSemantics = null; // "unified-plan" or "plan-b", ref: webrtc.org/web-apis/chrome/unified-plan/
        connection.iceCandidatePoolSize = null; // 0
        connection.bundlePolicy = null; // max-bundle
        connection.rtcpMuxPolicy = null; // "require" or "negotiate"
        connection.iceTransportPolicy = null; // "relay" or "all"
        connection.optionalArgument = {
            optional: [{
                DtlsSrtpKeyAgreement: true
            }, {
                googImprovedWifiBwe: true
            }, {
                googScreencastMinBitrate: 300
            }, {
                googIPv6: true
            }, {
                googDscp: true
            }, {
                googCpuUnderuseThreshold: 55
            }, {
                googCpuOveruseThreshold: 85
            }, {
                googSuspendBelowMinBitrate: true
            }, {
                googCpuOveruseDetection: true
            }],
            mandatory: {}
        };

        connection.iceServers = IceServersHandler.getIceServers(connection);

        connection.candidates = {
            host: true,
            stun: true,
            turn: true
        };

        connection.iceProtocols = {
            tcp: true,
            udp: true
        };

        // EVENTs
        connection.onopen = function(event) {
            if (!!connection.enableLogs) {
                console.info('Data connection has been opened between you & ', event.userid);
            }
        };

        connection.onclose = function(event) {
            if (!!connection.enableLogs) {
                console.warn('Data connection has been closed between you & ', event.userid);
            }
        };

        connection.onerror = function(error) {
            if (!!connection.enableLogs) {
                console.error(error.userid, 'data-error', error);
            }
        };

        connection.onmessage = function(event) {
            if (!!connection.enableLogs) {
                console.debug('data-message', event.userid, event.data);
            }
        };

        connection.send = function(data, remoteUserId) {
            connection.peers.send(data, remoteUserId);
        };

        connection.close = connection.disconnect = connection.leave = function() {
            connection.onbeforeunload(false, true);
        };

        connection.closeEntireSession = function(callback) {
            callback = callback || function() {};
            connection.socket.emit('close-entire-session', function looper() {
                if (connection.getAllParticipants().length) {
                    setTimeout(looper, 100);
                    return;
                }

                connection.onEntireSessionClosed({
                    sessionid: connection.sessionid,
                    userid: connection.userid,
                    extra: connection.extra
                });

                connection.changeUserId(null, function() {
                    connection.close();
                    callback();
                });
            });
        };

        connection.onEntireSessionClosed = function(event) {
            if (!connection.enableLogs) return;
            console.info('Entire session is closed: ', event.sessionid, event.extra);
        };

        connection.onstream = function(e) {
            var parentNode = connection.videosContainer;
            parentNode.insertBefore(e.mediaElement, parentNode.firstChild);
            var played = e.mediaElement.play();

            if (typeof played !== 'undefined') {
                played.catch(function() {
                    /*** iOS 11 doesn't allow automatic play and rejects ***/
                }).then(function() {
                    setTimeout(function() {
                        e.mediaElement.play();
                    }, 2000);
                });
                return;
            }

            setTimeout(function() {
                e.mediaElement.play();
            }, 2000);
        };

        connection.onstreamended = function(e) {
            if (!e.mediaElement) {
                e.mediaElement = document.getElementById(e.streamid);
            }

            if (!e.mediaElement || !e.mediaElement.parentNode) {
                return;
            }

            e.mediaElement.parentNode.removeChild(e.mediaElement);
        };

        connection.direction = 'many-to-many';

        connection.removeStream = function(streamid, remoteUserId) {
            var stream;
            connection.attachStreams.forEach(function(localStream) {
                if (localStream.id === streamid) {
                    stream = localStream;
                }
            });

            if (!stream) {
                console.warn('No such stream exist.', streamid);
                return;
            }

            connection.peers.getAllParticipants().forEach(function(participant) {
                if (remoteUserId && participant !== remoteUserId) {
                    return;
                }

                var user = connection.peers[participant];
                try {
                    user.peer.removeStream(stream);
                } catch (e) {}
            });

            connection.renegotiate();
        };

        connection.addStream = function(session, remoteUserId) {
            if (!!session.getTracks) {
                if (connection.attachStreams.indexOf(session) === -1) {
                    if (!session.streamid) {
                        session.streamid = session.id;
                    }

                    connection.attachStreams.push(session);
                }
                connection.renegotiate(remoteUserId);
                return;
            }

            if (isData(session)) {
                connection.renegotiate(remoteUserId);
                return;
            }

            if (session.audio || session.video || session.screen) {
                if (session.screen) {
                    if (DetectRTC.browser.name === 'Edge') {
                        navigator.getDisplayMedia({
                            video: true,
                            audio: isAudioPlusTab(connection)
                        }).then(function(screen) {
                            screen.isScreen = true;
                            mPeer.onGettingLocalMedia(screen);

                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                connection.invokeGetUserMedia(null, function(stream) {
                                    gumCallback(stream);
                                });
                            } else {
                                gumCallback(screen);
                            }
                        }, function(error) {
                            console.error('Unable to capture screen on Edge. HTTPs and version 17+ is required.');
                        });
                    } else {
                        connection.invokeGetUserMedia({
                            audio: isAudioPlusTab(connection),
                            video: true,
                            isScreen: true
                        }, function(stream) {
                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                connection.invokeGetUserMedia(null, function(stream) {
                                    gumCallback(stream);
                                });
                            } else {
                                gumCallback(stream);
                            }
                        });
                    }
                } else if (session.audio || session.video) {
                    connection.invokeGetUserMedia(null, gumCallback);
                }
            }

            function gumCallback(stream) {
                if (session.streamCallback) {
                    session.streamCallback(stream);
                }

                connection.renegotiate(remoteUserId);
            }
        };

        connection.invokeGetUserMedia = function(localMediaConstraints, callback, session) {
            if (!session) {
                session = connection.session;
            }

            if (!localMediaConstraints) {
                localMediaConstraints = connection.mediaConstraints;
            }

            getUserMediaHandler({
                onGettingLocalMedia: function(stream) {
                    var videoConstraints = localMediaConstraints.video;
                    if (videoConstraints) {
                        if (videoConstraints.mediaSource || videoConstraints.mozMediaSource) {
                            stream.isScreen = true;
                        } else if (videoConstraints.mandatory && videoConstraints.mandatory.chromeMediaSource) {
                            stream.isScreen = true;
                        }
                    }

                    if (!stream.isScreen) {
                        stream.isVideo = !!getTracks(stream, 'video').length;
                        stream.isAudio = !stream.isVideo && getTracks(stream, 'audio').length;
                    }

                    mPeer.onGettingLocalMedia(stream, function() {
                        if (typeof callback === 'function') {
                            callback(stream);
                        }
                    });
                },
                onLocalMediaError: function(error, constraints) {
                    mPeer.onLocalMediaError(error, constraints);
                },
                localMediaConstraints: localMediaConstraints || {
                    audio: session.audio ? localMediaConstraints.audio : false,
                    video: session.video ? localMediaConstraints.video : false
                }
            });
        };

        function applyConstraints(stream, mediaConstraints) {
            if (!stream) {
                if (!!connection.enableLogs) {
                    console.error('No stream to applyConstraints.');
                }
                return;
            }

            if (mediaConstraints.audio) {
                getTracks(stream, 'audio').forEach(function(track) {
                    track.applyConstraints(mediaConstraints.audio);
                });
            }

            if (mediaConstraints.video) {
                getTracks(stream, 'video').forEach(function(track) {
                    track.applyConstraints(mediaConstraints.video);
                });
            }
        }

        connection.applyConstraints = function(mediaConstraints, streamid) {
            if (!MediaStreamTrack || !MediaStreamTrack.prototype.applyConstraints) {
                alert('track.applyConstraints is NOT supported in your browser.');
                return;
            }

            if (streamid) {
                var stream;
                if (connection.streamEvents[streamid]) {
                    stream = connection.streamEvents[streamid].stream;
                }
                applyConstraints(stream, mediaConstraints);
                return;
            }

            connection.attachStreams.forEach(function(stream) {
                applyConstraints(stream, mediaConstraints);
            });
        };

        function replaceTrack(track, remoteUserId, isVideoTrack) {
            if (remoteUserId) {
                mPeer.replaceTrack(track, remoteUserId, isVideoTrack);
                return;
            }

            connection.peers.getAllParticipants().forEach(function(participant) {
                mPeer.replaceTrack(track, participant, isVideoTrack);
            });
        }

        connection.replaceTrack = function(session, remoteUserId, isVideoTrack) {
            session = session || {};

            if (!RTCPeerConnection.prototype.getSenders) {
                connection.addStream(session);
                return;
            }

            if (session instanceof MediaStreamTrack) {
                replaceTrack(session, remoteUserId, isVideoTrack);
                return;
            }

            if (session instanceof MediaStream) {
                if (getTracks(session, 'video').length) {
                    replaceTrack(getTracks(session, 'video')[0], remoteUserId, true);
                }

                if (getTracks(session, 'audio').length) {
                    replaceTrack(getTracks(session, 'audio')[0], remoteUserId, false);
                }
                return;
            }

            if (isData(session)) {
                throw 'connection.replaceTrack requires audio and/or video and/or screen.';
                return;
            }

            if (session.audio || session.video || session.screen) {
                if (session.screen) {
                    if (DetectRTC.browser.name === 'Edge') {
                        navigator.getDisplayMedia({
                            video: true,
                            audio: isAudioPlusTab(connection)
                        }).then(function(screen) {
                            screen.isScreen = true;
                            mPeer.onGettingLocalMedia(screen);

                            if ((session.audio || session.video) && !isAudioPlusTab(connection)) {
                                connection.invokeGetUserMedia(null, gumCallback);
                            } else {
                                gumCallback(screen);
                            }
                        }, function(error) {
                            console.error('Unable to capture screen on Edge. HTTPs and version 17+ is required.');
                        });
                    } else {
                        connection.invokeGetUserMedia({
                            audio: isAudioPlusTab(connection),
                            video: true,
                            isScreen: true
                        }, (session.audio || session.video) && !isAudioPlusTab(connection) ? connection.invokeGetUserMedia(null, gumCallback) : gumCallback);
                    }
                } else if (session.audio || session.video) {
                    connection.invokeGetUserMedia(null, gumCallback);
                }
            }

            function gumCallback(stream) {
                connection.replaceTrack(stream, remoteUserId, isVideoTrack || session.video || session.screen);
            }
        };

        connection.resetTrack = function(remoteUsersIds, isVideoTrack) {
            if (!remoteUsersIds) {
                remoteUsersIds = connection.getAllParticipants();
            }

            if (typeof remoteUsersIds == 'string') {
                remoteUsersIds = [remoteUsersIds];
            }

            remoteUsersIds.forEach(function(participant) {
                var peer = connection.peers[participant].peer;

                if ((typeof isVideoTrack === 'undefined' || isVideoTrack === true) && peer.lastVideoTrack) {
                    connection.replaceTrack(peer.lastVideoTrack, participant, true);
                }

                if ((typeof isVideoTrack === 'undefined' || isVideoTrack === false) && peer.lastAudioTrack) {
                    connection.replaceTrack(peer.lastAudioTrack, participant, false);
                }
            });
        };

        connection.renegotiate = function(remoteUserId) {
            if (remoteUserId) {
                mPeer.renegotiatePeer(remoteUserId);
                return;
            }

            connection.peers.getAllParticipants().forEach(function(participant) {
                mPeer.renegotiatePeer(participant);
            });
        };

        connection.setStreamEndHandler = function(stream, isRemote) {
            if (!stream || !stream.addEventListener) return;

            isRemote = !!isRemote;

            if (stream.alreadySetEndHandler) {
                return;
            }
            stream.alreadySetEndHandler = true;

            var streamEndedEvent = 'ended';

            if ('oninactive' in stream) {
                streamEndedEvent = 'inactive';
            }

            stream.addEventListener(streamEndedEvent, function() {
                if (stream.idInstance) {
                    currentUserMediaRequest.remove(stream.idInstance);
                }

                if (!isRemote) {
                    // reset attachStreams
                    var streams = [];
                    connection.attachStreams.forEach(function(s) {
                        if (s.id != stream.id) {
                            streams.push(s);
                        }
                    });
                    connection.attachStreams = streams;
                }

                // connection.renegotiate();

                var streamEvent = connection.streamEvents[stream.streamid];
                if (!streamEvent) {
                    streamEvent = {
                        stream: stream,
                        streamid: stream.streamid,
                        type: isRemote ? 'remote' : 'local',
                        userid: connection.userid,
                        extra: connection.extra,
                        mediaElement: connection.streamEvents[stream.streamid] ? connection.streamEvents[stream.streamid].mediaElement : null
                    };
                }

                if (isRemote && connection.peers[streamEvent.userid]) {
                    // reset remote "streams"
                    var peer = connection.peers[streamEvent.userid].peer;
                    var streams = [];
                    peer.getRemoteStreams().forEach(function(s) {
                        if (s.id != stream.id) {
                            streams.push(s);
                        }
                    });
                    connection.peers[streamEvent.userid].streams = streams;
                }

                if (streamEvent.userid === connection.userid && streamEvent.type === 'remote') {
                    return;
                }

                if (connection.peersBackup[streamEvent.userid]) {
                    streamEvent.extra = connection.peersBackup[streamEvent.userid].extra;
                }

                connection.onstreamended(streamEvent);

                delete connection.streamEvents[stream.streamid];
            }, false);
        };

        connection.onMediaError = function(error, constraints) {
            if (!!connection.enableLogs) {
                console.error(error, constraints);
            }
        };

        connection.autoCloseEntireSession = false;

        connection.filesContainer = connection.videosContainer = document.body || document.documentElement;
        connection.isInitiator = false;

        connection.shareFile = mPeer.shareFile;
        if (typeof FileProgressBarHandler !== 'undefined') {
            FileProgressBarHandler.handle(connection);
        }

        if (typeof TranslationHandler !== 'undefined') {
            TranslationHandler.handle(connection);
        }

        connection.token = getRandomString;

        connection.onNewParticipant = function(participantId, userPreferences) {
            connection.acceptParticipationRequest(participantId, userPreferences);
        };

        connection.acceptParticipationRequest = function(participantId, userPreferences) {
            if (userPreferences.successCallback) {
                userPreferences.successCallback();
                delete userPreferences.successCallback;
            }

            mPeer.createNewPeer(participantId, userPreferences);
        };

        if (typeof StreamsHandler !== 'undefined') {
            connection.StreamsHandler = StreamsHandler;
        }

        connection.onleave = function(userid) {};

        connection.invokeSelectFileDialog = function(callback) {
            var selector = new FileSelector();
            selector.accept = '*.*';
            selector.selectSingleFile(callback);
        };

        connection.onmute = function(e) {
            if (!e || !e.mediaElement) {
                return;
            }

            if (e.muteType === 'both' || e.muteType === 'video') {
                e.mediaElement.src = null;
                var paused = e.mediaElement.pause();
                if (typeof paused !== 'undefined') {
                    paused.then(function() {
                        e.mediaElement.poster = e.snapshot || 'https://cdn.webrtc-experiment.com/images/muted.png';
                    });
                } else {
                    e.mediaElement.poster = e.snapshot || 'https://cdn.webrtc-experiment.com/images/muted.png';
                }
            } else if (e.muteType === 'audio') {
                e.mediaElement.muted = true;
            }
        };

        connection.onunmute = function(e) {
            if (!e || !e.mediaElement || !e.stream) {
                return;
            }

            if (e.unmuteType === 'both' || e.unmuteType === 'video') {
                e.mediaElement.poster = null;
                e.mediaElement.srcObject = e.stream;
                e.mediaElement.play();
            } else if (e.unmuteType === 'audio') {
                e.mediaElement.muted = false;
            }
        };

        connection.onExtraDataUpdated = function(event) {
            event.status = 'online';
            connection.onUserStatusChanged(event, true);
        };

        connection.getAllParticipants = function(sender) {
            return connection.peers.getAllParticipants(sender);
        };

        if (typeof StreamsHandler !== 'undefined') {
            StreamsHandler.onSyncNeeded = function(streamid, action, type) {
                connection.peers.getAllParticipants().forEach(function(participant) {
                    mPeer.onNegotiationNeeded({
                        streamid: streamid,
                        action: action,
                        streamSyncNeeded: true,
                        type: type || 'both'
                    }, participant);
                });
            };
        }

        connection.connectSocket = function(callback) {
            connectSocket(callback);
        };

        connection.closeSocket = function() {
            try {
                io.sockets = {};
            } catch (e) {};

            if (!connection.socket) return;

            if (typeof connection.socket.disconnect === 'function') {
                connection.socket.disconnect();
            }

            if (typeof connection.socket.resetProps === 'function') {
                connection.socket.resetProps();
            }

            connection.socket = null;
        };

        connection.getSocket = function(callback) {
            if (!callback && connection.enableLogs) {
                console.warn('getSocket.callback paramter is required.');
            }

            callback = callback || function() {};

            if (!connection.socket) {
                connectSocket(function() {
                    callback(connection.socket);
                });
            } else {
                callback(connection.socket);
            }

            return connection.socket; // callback is preferred over return-statement
        };

        connection.getRemoteStreams = mPeer.getRemoteStreams;

        var skipStreams = ['selectFirst', 'selectAll', 'forEach'];

        connection.streamEvents = {
            selectFirst: function(options) {
                return connection.streamEvents.selectAll(options)[0];
            },
            selectAll: function(options) {
                if (!options) {
                    // default will always be all streams
                    options = {
                        local: true,
                        remote: true,
                        isScreen: true,
                        isAudio: true,
                        isVideo: true
                    };
                }

                if (options == 'local') {
                    options = {
                        local: true
                    };
                }

                if (options == 'remote') {
                    options = {
                        remote: true
                    };
                }

                if (options == 'screen') {
                    options = {
                        isScreen: true
                    };
                }

                if (options == 'audio') {
                    options = {
                        isAudio: true
                    };
                }

                if (options == 'video') {
                    options = {
                        isVideo: true
                    };
                }

                var streams = [];
                Object.keys(connection.streamEvents).forEach(function(key) {
                    var event = connection.streamEvents[key];

                    if (skipStreams.indexOf(key) !== -1) return;
                    var ignore = true;

                    if (options.local && event.type === 'local') {
                        ignore = false;
                    }

                    if (options.remote && event.type === 'remote') {
                        ignore = false;
                    }

                    if (options.isScreen && event.stream.isScreen) {
                        ignore = false;
                    }

                    if (options.isVideo && event.stream.isVideo) {
                        ignore = false;
                    }

                    if (options.isAudio && event.stream.isAudio) {
                        ignore = false;
                    }

                    if (options.userid && event.userid === options.userid) {
                        ignore = false;
                    }

                    if (ignore === false) {
                        streams.push(event);
                    }
                });

                return streams;
            }
        };

        connection.socketURL = '/'; // generated via config.json
        connection.socketMessageEvent = 'RTCMultiConnection-Message'; // generated via config.json
        connection.socketCustomEvent = 'RTCMultiConnection-Custom-Message'; // generated via config.json
        connection.DetectRTC = DetectRTC;

        connection.setCustomSocketEvent = function(customEvent) {
            if (customEvent) {
                connection.socketCustomEvent = customEvent;
            }

            if (!connection.socket) {
                return;
            }

            connection.socket.emit('set-custom-socket-event-listener', connection.socketCustomEvent);
        };

        connection.getNumberOfBroadcastViewers = function(broadcastId, callback) {
            if (!connection.socket || !broadcastId || !callback) return;

            connection.socket.emit('get-number-of-users-in-specific-broadcast', broadcastId, callback);
        };

        connection.onNumberOfBroadcastViewersUpdated = function(event) {
            if (!connection.enableLogs || !connection.isInitiator) return;
            console.info('Number of broadcast (', event.broadcastId, ') viewers', event.numberOfBroadcastViewers);
        };

        connection.onUserStatusChanged = function(event, dontWriteLogs) {
            if (!!connection.enableLogs && !dontWriteLogs) {
                console.info(event.userid, event.status);
            }
        };

        connection.getUserMediaHandler = getUserMediaHandler;
        connection.multiPeersHandler = mPeer;
        connection.enableLogs = true;
        connection.setCustomSocketHandler = function(customSocketHandler) {
            if (typeof SocketConnection !== 'undefined') {
                SocketConnection = customSocketHandler;
            }
        };

        // default value should be 15k because [old]Firefox's receiving limit is 16k!
        // however 64k works chrome-to-chrome
        connection.chunkSize = 40 * 1000;

        connection.maxParticipantsAllowed = 1000;

        // eject or leave single user
        connection.disconnectWith = mPeer.disconnectWith;

        // check if room exist on server
        // we will pass roomid to the server and wait for callback (i.e. server's response)
        connection.checkPresence = function(roomid, callback) {
            roomid = roomid || connection.sessionid;

            if (SocketConnection.name === 'SSEConnection') {
                SSEConnection.checkPresence(roomid, function(isRoomExist, _roomid, extra) {
                    if (!connection.socket) {
                        if (!isRoomExist) {
                           // connection.userid = _roomid;
                        }

                        connection.connectSocket(function() {
                            callback(isRoomExist, _roomid, extra);
                        });
                        return;
                    }
                    callback(isRoomExist, _roomid);
                });
                return;
            }

            if (!connection.socket) {
                connection.connectSocket(function() {
                    connection.checkPresence(roomid, callback);
                });
                return;
            }

            connection.socket.emit('check-presence', roomid + '', function(isRoomExist, _roomid, extra) {
                if (connection.enableLogs) {
                    console.log('checkPresence.isRoomExist: ', isRoomExist, ' roomid: ', _roomid);
                }
                callback(isRoomExist, _roomid, extra);
            });
        };

        connection.onReadyForOffer = function(remoteUserId, userPreferences) {
            connection.multiPeersHandler.createNewPeer(remoteUserId, userPreferences);
        };

        connection.setUserPreferences = function(userPreferences) {
            if (connection.dontAttachStream) {
                userPreferences.dontAttachLocalStream = true;
            }

            if (connection.dontGetRemoteStream) {
                userPreferences.dontGetRemoteStream = true;
            }

            return userPreferences;
        };

        connection.updateExtraData = function() {
            connection.socket.emit('extra-data-updated', connection.extra);
        };

        connection.enableScalableBroadcast = false;
        connection.maxRelayLimitPerUser = 3; // each broadcast should serve only 3 users

        connection.dontCaptureUserMedia = false;
        connection.dontAttachStream = false;
        connection.dontGetRemoteStream = false;

        connection.onReConnecting = function(event) {
            if (connection.enableLogs) {
                console.info('ReConnecting with', event.userid, '...');
            }
        };

        connection.beforeAddingStream = function(stream) {
            return stream;
        };

        connection.beforeRemovingStream = function(stream) {
            return stream;
        };

        if (typeof isChromeExtensionAvailable !== 'undefined') {
            connection.checkIfChromeExtensionAvailable = isChromeExtensionAvailable;
        }

        if (typeof isFirefoxExtensionAvailable !== 'undefined') {
            connection.checkIfChromeExtensionAvailable = isFirefoxExtensionAvailable;
        }

        if (typeof getChromeExtensionStatus !== 'undefined') {
            connection.getChromeExtensionStatus = getChromeExtensionStatus;
        }

        connection.modifyScreenConstraints = function(screen_constraints) {
            return screen_constraints;
        };
//var rem2 = localStorage.getItem("usernow");
        // rem2 = '"' + rem2 + '"';  
var con = 0;
	
	//setInterval(function(){alert(ssid2+" "+rem2);}, 15000);
		//ssid2 = JSON.parse(ssid2);
	   //var ssid2 = connection.sessionid;
        connection.onPeerStateChanged = function(state) {
            if (connection.enableLogs) {
                if (state.iceConnectionState.search(/closed|failed/gi) !== -1) {
                    console.error('Peer connection is closed between you & ', state.userid, state.extra, 'state:', state.iceConnectionState);
					con++;
					
			//alert(con);
			/*setTimeout(function(){
		if(con>1){
		connection.closeSocket();
		//connection.attachStreams.forEach(function(stream) {
		//	stream.stop();
	//	});

		var ssid6 = localStorage.getItem("tablesession");
		ssid6 = JSON.parse(ssid6);
		connection.join(ssid6);
		
		}con = 0;}, 10000);*/
					/*var rem2 = localStorage.getItem("usernow");
		
        //ssid2 = localStorage.getItem("tablesession");
		ssid2 = JSON.parse(ssid2);
				var myarray = rem2 + ',' + ssid2 ;
					myarray = JSON.stringify(myarray);
					connection.socket.emit('rej',myarray);*/
					/*connection.socket.emit('join-room', {
                sessionid: connection.sessionid,
                session: connection.session,
                mediaConstraints: connection.mediaConstraints,
                sdpConstraints: connection.sdpConstraints,
                streams: getStreamInfoForAdmin(),
                extra: connection.extra,
                password: typeof connection.password !== 'undefined' && typeof connection.password !== 'object' ? connection.password : ''
            });*/
			
                }
            }
        };

        connection.isOnline = true;

        listenEventHandler('online', function() {
            connection.isOnline = true;
        });

        listenEventHandler('offline', function() {
            connection.isOnline = false;
        });

        connection.isLowBandwidth = false;
        if (navigator && navigator.connection && navigator.connection.type) {
            connection.isLowBandwidth = navigator.connection.type.toString().toLowerCase().search(/wifi|cell/g) !== -1;
            if (connection.isLowBandwidth) {
                connection.bandwidth = {
                    audio: false,
                    video: false,
                    screen: false
                };

                if (connection.mediaConstraints.audio && connection.mediaConstraints.audio.optional && connection.mediaConstraints.audio.optional.length) {
                    var newArray = [];
                    connection.mediaConstraints.audio.optional.forEach(function(opt) {
                        if (typeof opt.bandwidth === 'undefined') {
                            newArray.push(opt);
                        }
                    });
                    connection.mediaConstraints.audio.optional = newArray;
                }

                if (connection.mediaConstraints.video && connection.mediaConstraints.video.optional && connection.mediaConstraints.video.optional.length) {
                    var newArray = [];
                    connection.mediaConstraints.video.optional.forEach(function(opt) {
                        if (typeof opt.bandwidth === 'undefined') {
                            newArray.push(opt);
                        }
                    });
                    connection.mediaConstraints.video.optional = newArray;
                }
            }
        }

        connection.getExtraData = function(remoteUserId, callback) {
            if (!remoteUserId) throw 'remoteUserId is required.';

            if (typeof callback === 'function') {
                connection.socket.emit('get-remote-user-extra-data', remoteUserId, function(extra, remoteUserId, error) {
                    callback(extra, remoteUserId, error);
                });
                return;
            }

            if (!connection.peers[remoteUserId]) {
                if (connection.peersBackup[remoteUserId]) {
                    return connection.peersBackup[remoteUserId].extra;
                }
                return {};
            }

            return connection.peers[remoteUserId].extra;
        };

        if (!!forceOptions.autoOpenOrJoin) {
            connection.openOrJoin(connection.sessionid);
        }

        connection.onUserIdAlreadyTaken = function(useridAlreadyTaken, yourNewUserId) {
            // via #683
            connection.close();
            connection.closeSocket();

            connection.isInitiator = false;
            connection.userid = connection.token();

            connection.join(connection.sessionid);

            if (connection.enableLogs) {
                console.warn('Userid already taken.', useridAlreadyTaken, 'Your new userid:', connection.userid);
				
		
            }
        };

        connection.trickleIce = true;
        connection.version = '3.6.9';

        connection.onSettingLocalDescription = function(event) {
            if (connection.enableLogs) {
                console.info('Set local description for remote user', event.userid);
            }
        };

        connection.resetScreen = function() {
            sourceId = null;
            if (DetectRTC && DetectRTC.screen) {
                delete DetectRTC.screen.sourceId;
            }

            currentUserMediaRequest = {
                streams: [],
                mutex: false,
                queueRequests: []
            };
        };

        // if disabled, "event.mediaElement" for "onstream" will be NULL
        connection.autoCreateMediaElement = true;

        // set password
        connection.password = null;

        // set password
        connection.setPassword = function(password, callback) {
            callback = callback || function() {};
            if (connection.socket) {
                connection.socket.emit('set-password', password, callback);
            } else {
                connection.password = password;
                callback(true, connection.sessionid, null);
            }
        };

        connection.onSocketDisconnect = function(event) {
            if (connection.enableLogs) {
                console.warn('socket.io connection is closed');
            }
        };

        connection.onSocketError = function(event) {
            if (connection.enableLogs) {
                console.warn('socket.io connection is failed');
            }
        };

        // error messages
        connection.errors = {
            ROOM_NOT_AVAILABLE: 'Room not available',
            INVALID_PASSWORD: 'Invalid password',
            USERID_NOT_AVAILABLE: 'User ID does not exist',
            ROOM_PERMISSION_DENIED: 'Room permission denied',
            ROOM_FULL: 'Room full',
            DID_NOT_JOIN_ANY_ROOM: 'Did not join any room yet',
            INVALID_SOCKET: 'Invalid socket',
            PUBLIC_IDENTIFIER_MISSING: 'publicRoomIdentifier is required',
            INVALID_ADMIN_CREDENTIAL: 'Invalid username or password attempted'
        };
    })(this);

};

if (typeof module !== 'undefined' /* && !!module.exports*/ ) {
    module.exports = exports = RTCMultiConnection;
}

if (typeof define === 'function' && define.amd) {
    define('RTCMultiConnection', [], function() {
        return RTCMultiConnection;
    });
}
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.adapter = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){


'use strict';

var _adapter_factory = require('./adapter_factory.js');

var adapter = (0, _adapter_factory.adapterFactory)({ window: typeof window === 'undefined' ? undefined : window });
module.exports = adapter; // this is the difference from adapter_core.

},{"./adapter_factory.js":2}],2:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.adapterFactory = adapterFactory;

var _utils = require('./utils');

var utils = _interopRequireWildcard(_utils);

var _chrome_shim = require('./chrome/chrome_shim');

var chromeShim = _interopRequireWildcard(_chrome_shim);

var _firefox_shim = require('./firefox/firefox_shim');

var firefoxShim = _interopRequireWildcard(_firefox_shim);

var _safari_shim = require('./safari/safari_shim');

var safariShim = _interopRequireWildcard(_safari_shim);

var _common_shim = require('./common_shim');

var commonShim = _interopRequireWildcard(_common_shim);

var _sdp = require('sdp');

var sdp = _interopRequireWildcard(_sdp);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

// Shimming starts here.
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
function adapterFactory() {
  var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      window = _ref.window;

  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
    shimChrome: true,
    shimFirefox: true,
    shimSafari: true
  };

  // Utils.
  var logging = utils.log;
  var browserDetails = utils.detectBrowser(window);

  var adapter = {
    browserDetails: browserDetails,
    commonShim: commonShim,
    extractVersion: utils.extractVersion,
    disableLog: utils.disableLog,
    disableWarnings: utils.disableWarnings,
    // Expose sdp as a convenience. For production apps include directly.
    sdp: sdp
  };

  // Shim browser if found.
  switch (browserDetails.browser) {
    case 'chrome':
      if (!chromeShim || !chromeShim.shimPeerConnection || !options.shimChrome) {
        logging('Chrome shim is not included in this adapter release.');
        return adapter;
      }
      if (browserDetails.version === null) {
        logging('Chrome shim can not determine version, not shimming.');
        return adapter;
      }
      logging('adapter.js shimming chrome.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = chromeShim;

      // Must be called before shimPeerConnection.
      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);

      chromeShim.shimGetUserMedia(window, browserDetails);
      chromeShim.shimMediaStream(window, browserDetails);
      chromeShim.shimPeerConnection(window, browserDetails);
      chromeShim.shimOnTrack(window, browserDetails);
      chromeShim.shimAddTrackRemoveTrack(window, browserDetails);
      chromeShim.shimGetSendersWithDtmf(window, browserDetails);
      chromeShim.shimGetStats(window, browserDetails);
      chromeShim.shimSenderReceiverGetStats(window, browserDetails);
      chromeShim.fixNegotiationNeeded(window, browserDetails);

      commonShim.shimRTCIceCandidate(window, browserDetails);
      commonShim.shimConnectionState(window, browserDetails);
      commonShim.shimMaxMessageSize(window, browserDetails);
      commonShim.shimSendThrowTypeError(window, browserDetails);
      commonShim.removeExtmapAllowMixed(window, browserDetails);
      break;
    case 'firefox':
      if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {
        logging('Firefox shim is not included in this adapter release.');
        return adapter;
      }
      logging('adapter.js shimming firefox.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = firefoxShim;

      // Must be called before shimPeerConnection.
      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);

      firefoxShim.shimGetUserMedia(window, browserDetails);
      firefoxShim.shimPeerConnection(window, browserDetails);
      firefoxShim.shimOnTrack(window, browserDetails);
      firefoxShim.shimRemoveStream(window, browserDetails);
      firefoxShim.shimSenderGetStats(window, browserDetails);
      firefoxShim.shimReceiverGetStats(window, browserDetails);
      firefoxShim.shimRTCDataChannel(window, browserDetails);
      firefoxShim.shimAddTransceiver(window, browserDetails);
      firefoxShim.shimGetParameters(window, browserDetails);
      firefoxShim.shimCreateOffer(window, browserDetails);
      firefoxShim.shimCreateAnswer(window, browserDetails);

      commonShim.shimRTCIceCandidate(window, browserDetails);
      commonShim.shimConnectionState(window, browserDetails);
      commonShim.shimMaxMessageSize(window, browserDetails);
      commonShim.shimSendThrowTypeError(window, browserDetails);
      break;
    case 'safari':
      if (!safariShim || !options.shimSafari) {
        logging('Safari shim is not included in this adapter release.');
        return adapter;
      }
      logging('adapter.js shimming safari.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = safariShim;

      // Must be called before shimCallbackAPI.
      commonShim.shimAddIceCandidateNullOrEmpty(window, browserDetails);
      commonShim.shimParameterlessSetLocalDescription(window, browserDetails);

      safariShim.shimRTCIceServerUrls(window, browserDetails);
      safariShim.shimCreateOfferLegacy(window, browserDetails);
      safariShim.shimCallbacksAPI(window, browserDetails);
      safariShim.shimLocalStreamsAPI(window, browserDetails);
      safariShim.shimRemoteStreamsAPI(window, browserDetails);
      safariShim.shimTrackEventTransceiver(window, browserDetails);
      safariShim.shimGetUserMedia(window, browserDetails);
      safariShim.shimAudioContext(window, browserDetails);

      commonShim.shimRTCIceCandidate(window, browserDetails);
      commonShim.shimMaxMessageSize(window, browserDetails);
      commonShim.shimSendThrowTypeError(window, browserDetails);
      commonShim.removeExtmapAllowMixed(window, browserDetails);
      break;
    default:
      logging('Unsupported browser!');
      break;
  }

  return adapter;
}

// Browser shims.

},{"./chrome/chrome_shim":3,"./common_shim":6,"./firefox/firefox_shim":7,"./safari/safari_shim":10,"./utils":11,"sdp":12}],3:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _getusermedia = require('./getusermedia');

Object.defineProperty(exports, 'shimGetUserMedia', {
  enumerable: true,
  get: function get() {
    return _getusermedia.shimGetUserMedia;
  }
});

var _getdisplaymedia = require('./getdisplaymedia');

Object.defineProperty(exports, 'shimGetDisplayMedia', {
  enumerable: true,
  get: function get() {
    return _getdisplaymedia.shimGetDisplayMedia;
  }
});
exports.shimMediaStream = shimMediaStream;
exports.shimOnTrack = shimOnTrack;
exports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;
exports.shimGetStats = shimGetStats;
exports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;
exports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;
exports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;
exports.shimPeerConnection = shimPeerConnection;
exports.fixNegotiationNeeded = fixNegotiationNeeded;

var _utils = require('../utils.js');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function shimMediaStream(window) {
  window.MediaStream = window.MediaStream || window.webkitMediaStream;
}

function shimOnTrack(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('ontrack' in window.RTCPeerConnection.prototype)) {
    Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
      get: function get() {
        return this._ontrack;
      },
      set: function set(f) {
        if (this._ontrack) {
          this.removeEventListener('track', this._ontrack);
        }
        this.addEventListener('track', this._ontrack = f);
      },

      enumerable: true,
      configurable: true
    });
    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
      var _this = this;

      if (!this._ontrackpoly) {
        this._ontrackpoly = function (e) {
          // onaddstream does not fire when a track is added to an existing
          // stream. But stream.onaddtrack is implemented so we use that.
          e.stream.addEventListener('addtrack', function (te) {
            var receiver = void 0;
            if (window.RTCPeerConnection.prototype.getReceivers) {
              receiver = _this.getReceivers().find(function (r) {
                return r.track && r.track.id === te.track.id;
              });
            } else {
              receiver = { track: te.track };
            }

            var event = new Event('track');
            event.track = te.track;
            event.receiver = receiver;
            event.transceiver = { receiver: receiver };
            event.streams = [e.stream];
            _this.dispatchEvent(event);
          });
          e.stream.getTracks().forEach(function (track) {
            var receiver = void 0;
            if (window.RTCPeerConnection.prototype.getReceivers) {
              receiver = _this.getReceivers().find(function (r) {
                return r.track && r.track.id === track.id;
              });
            } else {
              receiver = { track: track };
            }
            var event = new Event('track');
            event.track = track;
            event.receiver = receiver;
            event.transceiver = { receiver: receiver };
            event.streams = [e.stream];
            _this.dispatchEvent(event);
          });
        };
        this.addEventListener('addstream', this._ontrackpoly);
      }
      return origSetRemoteDescription.apply(this, arguments);
    };
  } else {
    // even if RTCRtpTransceiver is in window, it is only used and
    // emitted in unified-plan. Unfortunately this means we need
    // to unconditionally wrap the event.
    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
      if (!e.transceiver) {
        Object.defineProperty(e, 'transceiver', { value: { receiver: e.receiver } });
      }
      return e;
    });
  }
}

function shimGetSendersWithDtmf(window) {
  // Overrides addTrack/removeTrack, depends on shimAddTrackRemoveTrack.
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && !('getSenders' in window.RTCPeerConnection.prototype) && 'createDTMFSender' in window.RTCPeerConnection.prototype) {
    var shimSenderWithDtmf = function shimSenderWithDtmf(pc, track) {
      return {
        track: track,
        get dtmf() {
          if (this._dtmf === undefined) {
            if (track.kind === 'audio') {
              this._dtmf = pc.createDTMFSender(track);
            } else {
              this._dtmf = null;
            }
          }
          return this._dtmf;
        },
        _pc: pc
      };
    };

    // augment addTrack when getSenders is not available.
    if (!window.RTCPeerConnection.prototype.getSenders) {
      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
        this._senders = this._senders || [];
        return this._senders.slice(); // return a copy of the internal state.
      };
      var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
      window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
        var sender = origAddTrack.apply(this, arguments);
        if (!sender) {
          sender = shimSenderWithDtmf(this, track);
          this._senders.push(sender);
        }
        return sender;
      };

      var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
      window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
        origRemoveTrack.apply(this, arguments);
        var idx = this._senders.indexOf(sender);
        if (idx !== -1) {
          this._senders.splice(idx, 1);
        }
      };
    }
    var origAddStream = window.RTCPeerConnection.prototype.addStream;
    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
      var _this2 = this;

      this._senders = this._senders || [];
      origAddStream.apply(this, [stream]);
      stream.getTracks().forEach(function (track) {
        _this2._senders.push(shimSenderWithDtmf(_this2, track));
      });
    };

    var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
      var _this3 = this;

      this._senders = this._senders || [];
      origRemoveStream.apply(this, [stream]);

      stream.getTracks().forEach(function (track) {
        var sender = _this3._senders.find(function (s) {
          return s.track === track;
        });
        if (sender) {
          // remove sender
          _this3._senders.splice(_this3._senders.indexOf(sender), 1);
        }
      });
    };
  } else if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
      var _this4 = this;

      var senders = origGetSenders.apply(this, []);
      senders.forEach(function (sender) {
        return sender._pc = _this4;
      });
      return senders;
    };

    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
      get: function get() {
        if (this._dtmf === undefined) {
          if (this.track.kind === 'audio') {
            this._dtmf = this._pc.createDTMFSender(this.track);
          } else {
            this._dtmf = null;
          }
        }
        return this._dtmf;
      }
    });
  }
}

function shimGetStats(window) {
  if (!window.RTCPeerConnection) {
    return;
  }

  var origGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    var _this5 = this;

    var _arguments = Array.prototype.slice.call(arguments),
        selector = _arguments[0],
        onSucc = _arguments[1],
        onErr = _arguments[2];

    // If selector is a function then we are in the old style stats so just
    // pass back the original getStats format to avoid breaking old users.


    if (arguments.length > 0 && typeof selector === 'function') {
      return origGetStats.apply(this, arguments);
    }

    // When spec-style getStats is supported, return those when called with
    // either no arguments or the selector argument is null.
    if (origGetStats.length === 0 && (arguments.length === 0 || typeof selector !== 'function')) {
      return origGetStats.apply(this, []);
    }

    var fixChromeStats_ = function fixChromeStats_(response) {
      var standardReport = {};
      var reports = response.result();
      reports.forEach(function (report) {
        var standardStats = {
          id: report.id,
          timestamp: report.timestamp,
          type: {
            localcandidate: 'local-candidate',
            remotecandidate: 'remote-candidate'
          }[report.type] || report.type
        };
        report.names().forEach(function (name) {
          standardStats[name] = report.stat(name);
        });
        standardReport[standardStats.id] = standardStats;
      });

      return standardReport;
    };

    // shim getStats with maplike support
    var makeMapStats = function makeMapStats(stats) {
      return new Map(Object.keys(stats).map(function (key) {
        return [key, stats[key]];
      }));
    };

    if (arguments.length >= 2) {
      var successCallbackWrapper_ = function successCallbackWrapper_(response) {
        onSucc(makeMapStats(fixChromeStats_(response)));
      };

      return origGetStats.apply(this, [successCallbackWrapper_, selector]);
    }

    // promise-support
    return new Promise(function (resolve, reject) {
      origGetStats.apply(_this5, [function (response) {
        resolve(makeMapStats(fixChromeStats_(response)));
      }, reject]);
    }).then(onSucc, onErr);
  };
}

function shimSenderReceiverGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {
    return;
  }

  // shim sender stats.
  if (!('getStats' in window.RTCRtpSender.prototype)) {
    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
    if (origGetSenders) {
      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
        var _this6 = this;

        var senders = origGetSenders.apply(this, []);
        senders.forEach(function (sender) {
          return sender._pc = _this6;
        });
        return senders;
      };
    }

    var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
    if (origAddTrack) {
      window.RTCPeerConnection.prototype.addTrack = function addTrack() {
        var sender = origAddTrack.apply(this, arguments);
        sender._pc = this;
        return sender;
      };
    }
    window.RTCRtpSender.prototype.getStats = function getStats() {
      var sender = this;
      return this._pc.getStats().then(function (result) {
        return (
          /* Note: this will include stats of all senders that
           *   send a track with the same id as sender.track as
           *   it is not possible to identify the RTCRtpSender.
           */
          utils.filterStats(result, sender.track, true)
        );
      });
    };
  }

  // shim receiver stats.
  if (!('getStats' in window.RTCRtpReceiver.prototype)) {
    var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
    if (origGetReceivers) {
      window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
        var _this7 = this;

        var receivers = origGetReceivers.apply(this, []);
        receivers.forEach(function (receiver) {
          return receiver._pc = _this7;
        });
        return receivers;
      };
    }
    utils.wrapPeerConnectionEvent(window, 'track', function (e) {
      e.receiver._pc = e.srcElement;
      return e;
    });
    window.RTCRtpReceiver.prototype.getStats = function getStats() {
      var receiver = this;
      return this._pc.getStats().then(function (result) {
        return utils.filterStats(result, receiver.track, false);
      });
    };
  }

  if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {
    return;
  }

  // shim RTCPeerConnection.getStats(track).
  var origGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {
      var track = arguments[0];
      var sender = void 0;
      var receiver = void 0;
      var err = void 0;
      this.getSenders().forEach(function (s) {
        if (s.track === track) {
          if (sender) {
            err = true;
          } else {
            sender = s;
          }
        }
      });
      this.getReceivers().forEach(function (r) {
        if (r.track === track) {
          if (receiver) {
            err = true;
          } else {
            receiver = r;
          }
        }
        return r.track === track;
      });
      if (err || sender && receiver) {
        return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));
      } else if (sender) {
        return sender.getStats();
      } else if (receiver) {
        return receiver.getStats();
      }
      return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));
    }
    return origGetStats.apply(this, arguments);
  };
}

function shimAddTrackRemoveTrackWithNative(window) {
  // shim addTrack/removeTrack with native variants in order to make
  // the interactions with legacy getLocalStreams behave as in other browsers.
  // Keeps a mapping stream.id => [stream, rtpsenders...]
  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
    var _this8 = this;

    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    return Object.keys(this._shimmedLocalStreams).map(function (streamId) {
      return _this8._shimmedLocalStreams[streamId][0];
    });
  };

  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
    if (!stream) {
      return origAddTrack.apply(this, arguments);
    }
    this._shimmedLocalStreams = this._shimmedLocalStreams || {};

    var sender = origAddTrack.apply(this, arguments);
    if (!this._shimmedLocalStreams[stream.id]) {
      this._shimmedLocalStreams[stream.id] = [stream, sender];
    } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
      this._shimmedLocalStreams[stream.id].push(sender);
    }
    return sender;
  };

  var origAddStream = window.RTCPeerConnection.prototype.addStream;
  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
    var _this9 = this;

    this._shimmedLocalStreams = this._shimmedLocalStreams || {};

    stream.getTracks().forEach(function (track) {
      var alreadyExists = _this9.getSenders().find(function (s) {
        return s.track === track;
      });
      if (alreadyExists) {
        throw new DOMException('Track already exists.', 'InvalidAccessError');
      }
    });
    var existingSenders = this.getSenders();
    origAddStream.apply(this, arguments);
    var newSenders = this.getSenders().filter(function (newSender) {
      return existingSenders.indexOf(newSender) === -1;
    });
    this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
  };

  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    delete this._shimmedLocalStreams[stream.id];
    return origRemoveStream.apply(this, arguments);
  };

  var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
    var _this10 = this;

    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    if (sender) {
      Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {
        var idx = _this10._shimmedLocalStreams[streamId].indexOf(sender);
        if (idx !== -1) {
          _this10._shimmedLocalStreams[streamId].splice(idx, 1);
        }
        if (_this10._shimmedLocalStreams[streamId].length === 1) {
          delete _this10._shimmedLocalStreams[streamId];
        }
      });
    }
    return origRemoveTrack.apply(this, arguments);
  };
}

function shimAddTrackRemoveTrack(window, browserDetails) {
  if (!window.RTCPeerConnection) {
    return;
  }
  // shim addTrack and removeTrack.
  if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {
    return shimAddTrackRemoveTrackWithNative(window);
  }

  // also shim pc.getLocalStreams when addTrack is shimmed
  // to return the original streams.
  var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;
  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
    var _this11 = this;

    var nativeStreams = origGetLocalStreams.apply(this);
    this._reverseStreams = this._reverseStreams || {};
    return nativeStreams.map(function (stream) {
      return _this11._reverseStreams[stream.id];
    });
  };

  var origAddStream = window.RTCPeerConnection.prototype.addStream;
  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
    var _this12 = this;

    this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};

    stream.getTracks().forEach(function (track) {
      var alreadyExists = _this12.getSenders().find(function (s) {
        return s.track === track;
      });
      if (alreadyExists) {
        throw new DOMException('Track already exists.', 'InvalidAccessError');
      }
    });
    // Add identity mapping for consistency with addTrack.
    // Unless this is being used with a stream from addTrack.
    if (!this._reverseStreams[stream.id]) {
      var newStream = new window.MediaStream(stream.getTracks());
      this._streams[stream.id] = newStream;
      this._reverseStreams[newStream.id] = stream;
      stream = newStream;
    }
    origAddStream.apply(this, [stream]);
  };

  var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};

    origRemoveStream.apply(this, [this._streams[stream.id] || stream]);
    delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];
    delete this._streams[stream.id];
  };

  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
    var _this13 = this;

    if (this.signalingState === 'closed') {
      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
    }
    var streams = [].slice.call(arguments, 1);
    if (streams.length !== 1 || !streams[0].getTracks().find(function (t) {
      return t === track;
    })) {
      // this is not fully correct but all we can manage without
      // [[associated MediaStreams]] internal slot.
      throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');
    }

    var alreadyExists = this.getSenders().find(function (s) {
      return s.track === track;
    });
    if (alreadyExists) {
      throw new DOMException('Track already exists.', 'InvalidAccessError');
    }

    this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};
    var oldStream = this._streams[stream.id];
    if (oldStream) {
      // this is using odd Chrome behaviour, use with caution:
      // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
      // Note: we rely on the high-level addTrack/dtmf shim to
      // create the sender with a dtmf sender.
      oldStream.addTrack(track);

      // Trigger ONN async.
      Promise.resolve().then(function () {
        _this13.dispatchEvent(new Event('negotiationneeded'));
      });
    } else {
      var newStream = new window.MediaStream([track]);
      this._streams[stream.id] = newStream;
      this._reverseStreams[newStream.id] = stream;
      this.addStream(newStream);
    }
    return this.getSenders().find(function (s) {
      return s.track === track;
    });
  };

  // replace the internal stream id with the external one and
  // vice versa.
  function replaceInternalStreamId(pc, description) {
    var sdp = description.sdp;
    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
      var externalStream = pc._reverseStreams[internalId];
      var internalStream = pc._streams[externalStream.id];
      sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);
    });
    return new RTCSessionDescription({
      type: description.type,
      sdp: sdp
    });
  }
  function replaceExternalStreamId(pc, description) {
    var sdp = description.sdp;
    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
      var externalStream = pc._reverseStreams[internalId];
      var internalStream = pc._streams[externalStream.id];
      sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);
    });
    return new RTCSessionDescription({
      type: description.type,
      sdp: sdp
    });
  }
  ['createOffer', 'createAnswer'].forEach(function (method) {
    var nativeMethod = window.RTCPeerConnection.prototype[method];
    var methodObj = _defineProperty({}, method, function () {
      var _this14 = this;

      var args = arguments;
      var isLegacyCall = arguments.length && typeof arguments[0] === 'function';
      if (isLegacyCall) {
        return nativeMethod.apply(this, [function (description) {
          var desc = replaceInternalStreamId(_this14, description);
          args[0].apply(null, [desc]);
        }, function (err) {
          if (args[1]) {
            args[1].apply(null, err);
          }
        }, arguments[2]]);
      }
      return nativeMethod.apply(this, arguments).then(function (description) {
        return replaceInternalStreamId(_this14, description);
      });
    });
    window.RTCPeerConnection.prototype[method] = methodObj[method];
  });

  var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
    if (!arguments.length || !arguments[0].type) {
      return origSetLocalDescription.apply(this, arguments);
    }
    arguments[0] = replaceExternalStreamId(this, arguments[0]);
    return origSetLocalDescription.apply(this, arguments);
  };

  // TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier

  var origLocalDescription = Object.getOwnPropertyDescriptor(window.RTCPeerConnection.prototype, 'localDescription');
  Object.defineProperty(window.RTCPeerConnection.prototype, 'localDescription', {
    get: function get() {
      var description = origLocalDescription.get.apply(this);
      if (description.type === '') {
        return description;
      }
      return replaceInternalStreamId(this, description);
    }
  });

  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
    var _this15 = this;

    if (this.signalingState === 'closed') {
      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
    }
    // We can not yet check for sender instanceof RTCRtpSender
    // since we shim RTPSender. So we check if sender._pc is set.
    if (!sender._pc) {
      throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');
    }
    var isLocal = sender._pc === this;
    if (!isLocal) {
      throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');
    }

    // Search for the native stream the senders track belongs to.
    this._streams = this._streams || {};
    var stream = void 0;
    Object.keys(this._streams).forEach(function (streamid) {
      var hasTrack = _this15._streams[streamid].getTracks().find(function (track) {
        return sender.track === track;
      });
      if (hasTrack) {
        stream = _this15._streams[streamid];
      }
    });

    if (stream) {
      if (stream.getTracks().length === 1) {
        // if this is the last track of the stream, remove the stream. This
        // takes care of any shimmed _senders.
        this.removeStream(this._reverseStreams[stream.id]);
      } else {
        // relying on the same odd chrome behaviour as above.
        stream.removeTrack(sender.track);
      }
      this.dispatchEvent(new Event('negotiationneeded'));
    }
  };
}

function shimPeerConnection(window, browserDetails) {
  if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
    // very basic support for old versions.
    window.RTCPeerConnection = window.webkitRTCPeerConnection;
  }
  if (!window.RTCPeerConnection) {
    return;
  }

  // shim implicit creation of RTCSessionDescription/RTCIceCandidate
  if (browserDetails.version < 53) {
    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
      var nativeMethod = window.RTCPeerConnection.prototype[method];
      var methodObj = _defineProperty({}, method, function () {
        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
        return nativeMethod.apply(this, arguments);
      });
      window.RTCPeerConnection.prototype[method] = methodObj[method];
    });
  }
}

// Attempt to fix ONN in plan-b mode.
function fixNegotiationNeeded(window, browserDetails) {
  utils.wrapPeerConnectionEvent(window, 'negotiationneeded', function (e) {
    var pc = e.target;
    if (browserDetails.version < 72 || pc.getConfiguration && pc.getConfiguration().sdpSemantics === 'plan-b') {
      if (pc.signalingState !== 'stable') {
        return;
      }
    }
    return e;
  });
}

},{"../utils.js":11,"./getdisplaymedia":4,"./getusermedia":5}],4:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = shimGetDisplayMedia;
function shimGetDisplayMedia(window, getSourceId) {
  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
    return;
  }
  if (!window.navigator.mediaDevices) {
    return;
  }
  // getSourceId is a function that returns a promise resolving with
  // the sourceId of the screen/window/tab to be shared.
  if (typeof getSourceId !== 'function') {
    console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');
    return;
  }
  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
    return getSourceId(constraints).then(function (sourceId) {
      var widthSpecified = constraints.video && constraints.video.width;
      var heightSpecified = constraints.video && constraints.video.height;
      var frameRateSpecified = constraints.video && constraints.video.frameRate;
      constraints.video = {
        mandatory: {
          chromeMediaSource: 'desktop',
          chromeMediaSourceId: sourceId,
          maxFrameRate: frameRateSpecified || 3
        }
      };
      if (widthSpecified) {
        constraints.video.mandatory.maxWidth = widthSpecified;
      }
      if (heightSpecified) {
        constraints.video.mandatory.maxHeight = heightSpecified;
      }
      return window.navigator.mediaDevices.getUserMedia(constraints);
    });
  };
}

},{}],5:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.shimGetUserMedia = shimGetUserMedia;

var _utils = require('../utils.js');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

var logging = utils.log;

function shimGetUserMedia(window, browserDetails) {
  var navigator = window && window.navigator;

  if (!navigator.mediaDevices) {
    return;
  }

  var constraintsToChrome_ = function constraintsToChrome_(c) {
    if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) !== 'object' || c.mandatory || c.optional) {
      return c;
    }
    var cc = {};
    Object.keys(c).forEach(function (key) {
      if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
        return;
      }
      var r = _typeof(c[key]) === 'object' ? c[key] : { ideal: c[key] };
      if (r.exact !== undefined && typeof r.exact === 'number') {
        r.min = r.max = r.exact;
      }
      var oldname_ = function oldname_(prefix, name) {
        if (prefix) {
          return prefix + name.charAt(0).toUpperCase() + name.slice(1);
        }
        return name === 'deviceId' ? 'sourceId' : name;
      };
      if (r.ideal !== undefined) {
        cc.optional = cc.optional || [];
        var oc = {};
        if (typeof r.ideal === 'number') {
          oc[oldname_('min', key)] = r.ideal;
          cc.optional.push(oc);
          oc = {};
          oc[oldname_('max', key)] = r.ideal;
          cc.optional.push(oc);
        } else {
          oc[oldname_('', key)] = r.ideal;
          cc.optional.push(oc);
        }
      }
      if (r.exact !== undefined && typeof r.exact !== 'number') {
        cc.mandatory = cc.mandatory || {};
        cc.mandatory[oldname_('', key)] = r.exact;
      } else {
        ['min', 'max'].forEach(function (mix) {
          if (r[mix] !== undefined) {
            cc.mandatory = cc.mandatory || {};
            cc.mandatory[oldname_(mix, key)] = r[mix];
          }
        });
      }
    });
    if (c.advanced) {
      cc.optional = (cc.optional || []).concat(c.advanced);
    }
    return cc;
  };

  var shimConstraints_ = function shimConstraints_(constraints, func) {
    if (browserDetails.version >= 61) {
      return func(constraints);
    }
    constraints = JSON.parse(JSON.stringify(constraints));
    if (constraints && _typeof(constraints.audio) === 'object') {
      var remap = function remap(obj, a, b) {
        if (a in obj && !(b in obj)) {
          obj[b] = obj[a];
          delete obj[a];
        }
      };
      constraints = JSON.parse(JSON.stringify(constraints));
      remap(constraints.audio, 'autoGainControl', 'googAutoGainControl');
      remap(constraints.audio, 'noiseSuppression', 'googNoiseSuppression');
      constraints.audio = constraintsToChrome_(constraints.audio);
    }
    if (constraints && _typeof(constraints.video) === 'object') {
      // Shim facingMode for mobile & surface pro.
      var face = constraints.video.facingMode;
      face = face && ((typeof face === 'undefined' ? 'undefined' : _typeof(face)) === 'object' ? face : { ideal: face });
      var getSupportedFacingModeLies = browserDetails.version < 66;

      if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {
        delete constraints.video.facingMode;
        var matches = void 0;
        if (face.exact === 'environment' || face.ideal === 'environment') {
          matches = ['back', 'rear'];
        } else if (face.exact === 'user' || face.ideal === 'user') {
          matches = ['front'];
        }
        if (matches) {
          // Look for matches in label, or use last cam for back (typical).
          return navigator.mediaDevices.enumerateDevices().then(function (devices) {
            devices = devices.filter(function (d) {
              return d.kind === 'videoinput';
            });
            var dev = devices.find(function (d) {
              return matches.some(function (match) {
                return d.label.toLowerCase().includes(match);
              });
            });
            if (!dev && devices.length && matches.includes('back')) {
              dev = devices[devices.length - 1]; // more likely the back cam
            }
            if (dev) {
              constraints.video.deviceId = face.exact ? { exact: dev.deviceId } : { ideal: dev.deviceId };
            }
            constraints.video = constraintsToChrome_(constraints.video);
            logging('chrome: ' + JSON.stringify(constraints));
            return func(constraints);
          });
        }
      }
      constraints.video = constraintsToChrome_(constraints.video);
    }
    logging('chrome: ' + JSON.stringify(constraints));
    return func(constraints);
  };

  var shimError_ = function shimError_(e) {
    if (browserDetails.version >= 64) {
      return e;
    }
    return {
      name: {
        PermissionDeniedError: 'NotAllowedError',
        PermissionDismissedError: 'NotAllowedError',
        InvalidStateError: 'NotAllowedError',
        DevicesNotFoundError: 'NotFoundError',
        ConstraintNotSatisfiedError: 'OverconstrainedError',
        TrackStartError: 'NotReadableError',
        MediaDeviceFailedDueToShutdown: 'NotAllowedError',
        MediaDeviceKillSwitchOn: 'NotAllowedError',
        TabCaptureError: 'AbortError',
        ScreenCaptureError: 'AbortError',
        DeviceCaptureError: 'AbortError'
      }[e.name] || e.name,
      message: e.message,
      constraint: e.constraint || e.constraintName,
      toString: function toString() {
        return this.name + (this.message && ': ') + this.message;
      }
    };
  };

  var getUserMedia_ = function getUserMedia_(constraints, onSuccess, onError) {
    shimConstraints_(constraints, function (c) {
      navigator.webkitGetUserMedia(c, onSuccess, function (e) {
        if (onError) {
          onError(shimError_(e));
        }
      });
    });
  };
  navigator.getUserMedia = getUserMedia_.bind(navigator);

  // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
  // function which returns a Promise, it does not accept spec-style
  // constraints.
  if (navigator.mediaDevices.getUserMedia) {
    var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
    navigator.mediaDevices.getUserMedia = function (cs) {
      return shimConstraints_(cs, function (c) {
        return origGetUserMedia(c).then(function (stream) {
          if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {
            stream.getTracks().forEach(function (track) {
              track.stop();
            });
            throw new DOMException('', 'NotFoundError');
          }
          return stream;
        }, function (e) {
          return Promise.reject(shimError_(e));
        });
      });
    };
  }
}

},{"../utils.js":11}],6:[function(require,module,exports){
/*
 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.shimRTCIceCandidate = shimRTCIceCandidate;
exports.shimMaxMessageSize = shimMaxMessageSize;
exports.shimSendThrowTypeError = shimSendThrowTypeError;
exports.shimConnectionState = shimConnectionState;
exports.removeExtmapAllowMixed = removeExtmapAllowMixed;
exports.shimAddIceCandidateNullOrEmpty = shimAddIceCandidateNullOrEmpty;
exports.shimParameterlessSetLocalDescription = shimParameterlessSetLocalDescription;

var _sdp = require('sdp');

var _sdp2 = _interopRequireDefault(_sdp);

var _utils = require('./utils');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function shimRTCIceCandidate(window) {
  // foundation is arbitrarily chosen as an indicator for full support for
  // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
  if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {
    return;
  }

  var NativeRTCIceCandidate = window.RTCIceCandidate;
  window.RTCIceCandidate = function RTCIceCandidate(args) {
    // Remove the a= which shouldn't be part of the candidate string.
    if ((typeof args === 'undefined' ? 'undefined' : _typeof(args)) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {
      args = JSON.parse(JSON.stringify(args));
      args.candidate = args.candidate.substr(2);
    }

    if (args.candidate && args.candidate.length) {
      // Augment the native candidate with the parsed fields.
      var nativeCandidate = new NativeRTCIceCandidate(args);
      var parsedCandidate = _sdp2.default.parseCandidate(args.candidate);
      var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate);

      // Add a serializer that does not serialize the extra attributes.
      augmentedCandidate.toJSON = function toJSON() {
        return {
          candidate: augmentedCandidate.candidate,
          sdpMid: augmentedCandidate.sdpMid,
          sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
          usernameFragment: augmentedCandidate.usernameFragment
        };
      };
      return augmentedCandidate;
    }
    return new NativeRTCIceCandidate(args);
  };
  window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;

  // Hook up the augmented candidate in onicecandidate and
  // addEventListener('icecandidate', ...)
  utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {
    if (e.candidate) {
      Object.defineProperty(e, 'candidate', {
        value: new window.RTCIceCandidate(e.candidate),
        writable: 'false'
      });
    }
    return e;
  });
}

function shimMaxMessageSize(window, browserDetails) {
  if (!window.RTCPeerConnection) {
    return;
  }

  if (!('sctp' in window.RTCPeerConnection.prototype)) {
    Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
      get: function get() {
        return typeof this._sctp === 'undefined' ? null : this._sctp;
      }
    });
  }

  var sctpInDescription = function sctpInDescription(description) {
    if (!description || !description.sdp) {
      return false;
    }
    var sections = _sdp2.default.splitSections(description.sdp);
    sections.shift();
    return sections.some(function (mediaSection) {
      var mLine = _sdp2.default.parseMLine(mediaSection);
      return mLine && mLine.kind === 'application' && mLine.protocol.indexOf('SCTP') !== -1;
    });
  };

  var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {
    // TODO: Is there a better solution for detecting Firefox?
    var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
    if (match === null || match.length < 2) {
      return -1;
    }
    var version = parseInt(match[1], 10);
    // Test for NaN (yes, this is ugly)
    return version !== version ? -1 : version;
  };

  var getCanSendMaxMessageSize = function getCanSendMaxMessageSize(remoteIsFirefox) {
    // Every implementation we know can send at least 64 KiB.
    // Note: Although Chrome is technically able to send up to 256 KiB, the
    //       data does not reach the other peer reliably.
    //       See: https://bugs.chromium.org/p/webrtc/issues/detail?id=8419
    var canSendMaxMessageSize = 65536;
    if (browserDetails.browser === 'firefox') {
      if (browserDetails.version < 57) {
        if (remoteIsFirefox === -1) {
          // FF < 57 will send in 16 KiB chunks using the deprecated PPID
          // fragmentation.
          canSendMaxMessageSize = 16384;
        } else {
          // However, other FF (and RAWRTC) can reassemble PPID-fragmented
          // messages. Thus, supporting ~2 GiB when sending.
          canSendMaxMessageSize = 2147483637;
        }
      } else if (browserDetails.version < 60) {
        // Currently, all FF >= 57 will reset the remote maximum message size
        // to the default value when a data channel is created at a later
        // stage. :(
        // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831
        canSendMaxMessageSize = browserDetails.version === 57 ? 65535 : 65536;
      } else {
        // FF >= 60 supports sending ~2 GiB
        canSendMaxMessageSize = 2147483637;
      }
    }
    return canSendMaxMessageSize;
  };

  var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {
    // Note: 65536 bytes is the default value from the SDP spec. Also,
    //       every implementation we know supports receiving 65536 bytes.
    var maxMessageSize = 65536;

    // FF 57 has a slightly incorrect default remote max message size, so
    // we need to adjust it here to avoid a failure when sending.
    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
    if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {
      maxMessageSize = 65535;
    }

    var match = _sdp2.default.matchPrefix(description.sdp, 'a=max-message-size:');
    if (match.length > 0) {
      maxMessageSize = parseInt(match[0].substr(19), 10);
    } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {
      // If the maximum message size is not present in the remote SDP and
      // both local and remote are Firefox, the remote peer can receive
      // ~2 GiB.
      maxMessageSize = 2147483637;
    }
    return maxMessageSize;
  };

  var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
    this._sctp = null;
    // Chrome decided to not expose .sctp in plan-b mode.
    // As usual, adapter.js has to do an 'ugly worakaround'
    // to cover up the mess.
    if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {
      var _getConfiguration = this.getConfiguration(),
          sdpSemantics = _getConfiguration.sdpSemantics;

      if (sdpSemantics === 'plan-b') {
        Object.defineProperty(this, 'sctp', {
          get: function get() {
            return typeof this._sctp === 'undefined' ? null : this._sctp;
          },

          enumerable: true,
          configurable: true
        });
      }
    }

    if (sctpInDescription(arguments[0])) {
      // Check if the remote is FF.
      var isFirefox = getRemoteFirefoxVersion(arguments[0]);

      // Get the maximum message size the local peer is capable of sending
      var canSendMMS = getCanSendMaxMessageSize(isFirefox);

      // Get the maximum message size of the remote peer.
      var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);

      // Determine final maximum message size
      var maxMessageSize = void 0;
      if (canSendMMS === 0 && remoteMMS === 0) {
        maxMessageSize = Number.POSITIVE_INFINITY;
      } else if (canSendMMS === 0 || remoteMMS === 0) {
        maxMessageSize = Math.max(canSendMMS, remoteMMS);
      } else {
        maxMessageSize = Math.min(canSendMMS, remoteMMS);
      }

      // Create a dummy RTCSctpTransport object and the 'maxMessageSize'
      // attribute.
      var sctp = {};
      Object.defineProperty(sctp, 'maxMessageSize', {
        get: function get() {
          return maxMessageSize;
        }
      });
      this._sctp = sctp;
    }

    return origSetRemoteDescription.apply(this, arguments);
  };
}

function shimSendThrowTypeError(window) {
  if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {
    return;
  }

  // Note: Although Firefox >= 57 has a native implementation, the maximum
  //       message size can be reset for all data channels at a later stage.
  //       See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831

  function wrapDcSend(dc, pc) {
    var origDataChannelSend = dc.send;
    dc.send = function send() {
      var data = arguments[0];
      var length = data.length || data.size || data.byteLength;
      if (dc.readyState === 'open' && pc.sctp && length > pc.sctp.maxMessageSize) {
        throw new TypeError('Message too large (can send a maximum of ' + pc.sctp.maxMessageSize + ' bytes)');
      }
      return origDataChannelSend.apply(dc, arguments);
    };
  }
  var origCreateDataChannel = window.RTCPeerConnection.prototype.createDataChannel;
  window.RTCPeerConnection.prototype.createDataChannel = function createDataChannel() {
    var dataChannel = origCreateDataChannel.apply(this, arguments);
    wrapDcSend(dataChannel, this);
    return dataChannel;
  };
  utils.wrapPeerConnectionEvent(window, 'datachannel', function (e) {
    wrapDcSend(e.channel, e.target);
    return e;
  });
}

/* shims RTCConnectionState by pretending it is the same as iceConnectionState.
 * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12
 * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect
 * since DTLS failures would be hidden. See
 * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827
 * for the Firefox tracking bug.
 */
function shimConnectionState(window) {
  if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {
    return;
  }
  var proto = window.RTCPeerConnection.prototype;
  Object.defineProperty(proto, 'connectionState', {
    get: function get() {
      return {
        completed: 'connected',
        checking: 'connecting'
      }[this.iceConnectionState] || this.iceConnectionState;
    },

    enumerable: true,
    configurable: true
  });
  Object.defineProperty(proto, 'onconnectionstatechange', {
    get: function get() {
      return this._onconnectionstatechange || null;
    },
    set: function set(cb) {
      if (this._onconnectionstatechange) {
        this.removeEventListener('connectionstatechange', this._onconnectionstatechange);
        delete this._onconnectionstatechange;
      }
      if (cb) {
        this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);
      }
    },

    enumerable: true,
    configurable: true
  });

  ['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {
    var origMethod = proto[method];
    proto[method] = function () {
      if (!this._connectionstatechangepoly) {
        this._connectionstatechangepoly = function (e) {
          var pc = e.target;
          if (pc._lastConnectionState !== pc.connectionState) {
            pc._lastConnectionState = pc.connectionState;
            var newEvent = new Event('connectionstatechange', e);
            pc.dispatchEvent(newEvent);
          }
          return e;
        };
        this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);
      }
      return origMethod.apply(this, arguments);
    };
  });
}

function removeExtmapAllowMixed(window, browserDetails) {
  /* remove a=extmap-allow-mixed for webrtc.org < M71 */
  if (!window.RTCPeerConnection) {
    return;
  }
  if (browserDetails.browser === 'chrome' && browserDetails.version >= 71) {
    return;
  }
  if (browserDetails.browser === 'safari' && browserDetails.version >= 605) {
    return;
  }
  var nativeSRD = window.RTCPeerConnection.prototype.setRemoteDescription;
  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription(desc) {
    if (desc && desc.sdp && desc.sdp.indexOf('\na=extmap-allow-mixed') !== -1) {
      var sdp = desc.sdp.split('\n').filter(function (line) {
        return line.trim() !== 'a=extmap-allow-mixed';
      }).join('\n');
      // Safari enforces read-only-ness of RTCSessionDescription fields.
      if (window.RTCSessionDescription && desc instanceof window.RTCSessionDescription) {
        arguments[0] = new window.RTCSessionDescription({
          type: desc.type,
          sdp: sdp
        });
      } else {
        desc.sdp = sdp;
      }
    }
    return nativeSRD.apply(this, arguments);
  };
}

function shimAddIceCandidateNullOrEmpty(window, browserDetails) {
  // Support for addIceCandidate(null or undefined)
  // as well as addIceCandidate({candidate: "", ...})
  // https://bugs.chromium.org/p/chromium/issues/detail?id=978582
  // Note: must be called before other polyfills which change the signature.
  if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {
    return;
  }
  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
  if (!nativeAddIceCandidate || nativeAddIceCandidate.length === 0) {
    return;
  }
  window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
    if (!arguments[0]) {
      if (arguments[1]) {
        arguments[1].apply(null);
      }
      return Promise.resolve();
    }
    // Firefox 68+ emits and processes {candidate: "", ...}, ignore
    // in older versions.
    // Native support for ignoring exists for Chrome M77+.
    // Safari ignores as well, exact version unknown but works in the same
    // version that also ignores addIceCandidate(null).
    if ((browserDetails.browser === 'chrome' && browserDetails.version < 78 || browserDetails.browser === 'firefox' && browserDetails.version < 68 || browserDetails.browser === 'safari') && arguments[0] && arguments[0].candidate === '') {
      return Promise.resolve();
    }
    return nativeAddIceCandidate.apply(this, arguments);
  };
}

// Note: Make sure to call this ahead of APIs that modify
// setLocalDescription.length
function shimParameterlessSetLocalDescription(window, browserDetails) {
  if (!(window.RTCPeerConnection && window.RTCPeerConnection.prototype)) {
    return;
  }
  var nativeSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
  if (!nativeSetLocalDescription || nativeSetLocalDescription.length === 0) {
    return;
  }
  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
    var _this = this;

    var desc = arguments[0] || {};
    if ((typeof desc === 'undefined' ? 'undefined' : _typeof(desc)) !== 'object' || desc.type && desc.sdp) {
      return nativeSetLocalDescription.apply(this, arguments);
    }
    // The remaining steps should technically happen when SLD comes off the
    // RTCPeerConnection's operations chain (not ahead of going on it), but
    // this is too difficult to shim. Instead, this shim only covers the
    // common case where the operations chain is empty. This is imperfect, but
    // should cover many cases. Rationale: Even if we can't reduce the glare
    // window to zero on imperfect implementations, there's value in tapping
    // into the perfect negotiation pattern that several browsers support.
    desc = { type: desc.type, sdp: desc.sdp };
    if (!desc.type) {
      switch (this.signalingState) {
        case 'stable':
        case 'have-local-offer':
        case 'have-remote-pranswer':
          desc.type = 'offer';
          break;
        default:
          desc.type = 'answer';
          break;
      }
    }
    if (desc.sdp || desc.type !== 'offer' && desc.type !== 'answer') {
      return nativeSetLocalDescription.apply(this, [desc]);
    }
    var func = desc.type === 'offer' ? this.createOffer : this.createAnswer;
    return func.apply(this).then(function (d) {
      return nativeSetLocalDescription.apply(_this, [d]);
    });
  };
}

},{"./utils":11,"sdp":12}],7:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _getusermedia = require('./getusermedia');

Object.defineProperty(exports, 'shimGetUserMedia', {
  enumerable: true,
  get: function get() {
    return _getusermedia.shimGetUserMedia;
  }
});

var _getdisplaymedia = require('./getdisplaymedia');

Object.defineProperty(exports, 'shimGetDisplayMedia', {
  enumerable: true,
  get: function get() {
    return _getdisplaymedia.shimGetDisplayMedia;
  }
});
exports.shimOnTrack = shimOnTrack;
exports.shimPeerConnection = shimPeerConnection;
exports.shimSenderGetStats = shimSenderGetStats;
exports.shimReceiverGetStats = shimReceiverGetStats;
exports.shimRemoveStream = shimRemoveStream;
exports.shimRTCDataChannel = shimRTCDataChannel;
exports.shimAddTransceiver = shimAddTransceiver;
exports.shimGetParameters = shimGetParameters;
exports.shimCreateOffer = shimCreateOffer;
exports.shimCreateAnswer = shimCreateAnswer;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function shimOnTrack(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
      get: function get() {
        return { receiver: this.receiver };
      }
    });
  }
}

function shimPeerConnection(window, browserDetails) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {
    return; // probably media.peerconnection.enabled=false in about:config
  }
  if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {
    // very basic support for old versions.
    window.RTCPeerConnection = window.mozRTCPeerConnection;
  }

  if (browserDetails.version < 53) {
    // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
      var nativeMethod = window.RTCPeerConnection.prototype[method];
      var methodObj = _defineProperty({}, method, function () {
        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
        return nativeMethod.apply(this, arguments);
      });
      window.RTCPeerConnection.prototype[method] = methodObj[method];
    });
  }

  var modernStatsTypes = {
    inboundrtp: 'inbound-rtp',
    outboundrtp: 'outbound-rtp',
    candidatepair: 'candidate-pair',
    localcandidate: 'local-candidate',
    remotecandidate: 'remote-candidate'
  };

  var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    var _arguments = Array.prototype.slice.call(arguments),
        selector = _arguments[0],
        onSucc = _arguments[1],
        onErr = _arguments[2];

    return nativeGetStats.apply(this, [selector || null]).then(function (stats) {
      if (browserDetails.version < 53 && !onSucc) {
        // Shim only promise getStats with spec-hyphens in type names
        // Leave callback version alone; misc old uses of forEach before Map
        try {
          stats.forEach(function (stat) {
            stat.type = modernStatsTypes[stat.type] || stat.type;
          });
        } catch (e) {
          if (e.name !== 'TypeError') {
            throw e;
          }
          // Avoid TypeError: "type" is read-only, in old versions. 34-43ish
          stats.forEach(function (stat, i) {
            stats.set(i, Object.assign({}, stat, {
              type: modernStatsTypes[stat.type] || stat.type
            }));
          });
        }
      }
      return stats;
    }).then(onSucc, onErr);
  };
}

function shimSenderGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
    return;
  }
  if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
    return;
  }
  var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
  if (origGetSenders) {
    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
      var _this = this;

      var senders = origGetSenders.apply(this, []);
      senders.forEach(function (sender) {
        return sender._pc = _this;
      });
      return senders;
    };
  }

  var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
  if (origAddTrack) {
    window.RTCPeerConnection.prototype.addTrack = function addTrack() {
      var sender = origAddTrack.apply(this, arguments);
      sender._pc = this;
      return sender;
    };
  }
  window.RTCRtpSender.prototype.getStats = function getStats() {
    return this.track ? this._pc.getStats(this.track) : Promise.resolve(new Map());
  };
}

function shimReceiverGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
    return;
  }
  if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
    return;
  }
  var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
  if (origGetReceivers) {
    window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
      var _this2 = this;

      var receivers = origGetReceivers.apply(this, []);
      receivers.forEach(function (receiver) {
        return receiver._pc = _this2;
      });
      return receivers;
    };
  }
  utils.wrapPeerConnectionEvent(window, 'track', function (e) {
    e.receiver._pc = e.srcElement;
    return e;
  });
  window.RTCRtpReceiver.prototype.getStats = function getStats() {
    return this._pc.getStats(this.track);
  };
}

function shimRemoveStream(window) {
  if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {
    return;
  }
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    var _this3 = this;

    utils.deprecated('removeStream', 'removeTrack');
    this.getSenders().forEach(function (sender) {
      if (sender.track && stream.getTracks().includes(sender.track)) {
        _this3.removeTrack(sender);
      }
    });
  };
}

function shimRTCDataChannel(window) {
  // rename DataChannel to RTCDataChannel (native fix in FF60):
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
  if (window.DataChannel && !window.RTCDataChannel) {
    window.RTCDataChannel = window.DataChannel;
  }
}

function shimAddTransceiver(window) {
  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
  // Firefox ignores the init sendEncodings options passed to addTransceiver
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
    return;
  }
  var origAddTransceiver = window.RTCPeerConnection.prototype.addTransceiver;
  if (origAddTransceiver) {
    window.RTCPeerConnection.prototype.addTransceiver = function addTransceiver() {
      this.setParametersPromises = [];
      var initParameters = arguments[1];
      var shouldPerformCheck = initParameters && 'sendEncodings' in initParameters;
      if (shouldPerformCheck) {
        // If sendEncodings params are provided, validate grammar
        initParameters.sendEncodings.forEach(function (encodingParam) {
          if ('rid' in encodingParam) {
            var ridRegex = /^[a-z0-9]{0,16}$/i;
            if (!ridRegex.test(encodingParam.rid)) {
              throw new TypeError('Invalid RID value provided.');
            }
          }
          if ('scaleResolutionDownBy' in encodingParam) {
            if (!(parseFloat(encodingParam.scaleResolutionDownBy) >= 1.0)) {
              throw new RangeError('scale_resolution_down_by must be >= 1.0');
            }
          }
          if ('maxFramerate' in encodingParam) {
            if (!(parseFloat(encodingParam.maxFramerate) >= 0)) {
              throw new RangeError('max_framerate must be >= 0.0');
            }
          }
        });
      }
      var transceiver = origAddTransceiver.apply(this, arguments);
      if (shouldPerformCheck) {
        // Check if the init options were applied. If not we do this in an
        // asynchronous way and save the promise reference in a global object.
        // This is an ugly hack, but at the same time is way more robust than
        // checking the sender parameters before and after the createOffer
        // Also note that after the createoffer we are not 100% sure that
        // the params were asynchronously applied so we might miss the
        // opportunity to recreate offer.
        var sender = transceiver.sender;

        var params = sender.getParameters();
        if (!('encodings' in params) ||
        // Avoid being fooled by patched getParameters() below.
        params.encodings.length === 1 && Object.keys(params.encodings[0]).length === 0) {
          params.encodings = initParameters.sendEncodings;
          sender.sendEncodings = initParameters.sendEncodings;
          this.setParametersPromises.push(sender.setParameters(params).then(function () {
            delete sender.sendEncodings;
          }).catch(function () {
            delete sender.sendEncodings;
          }));
        }
      }
      return transceiver;
    };
  }
}

function shimGetParameters(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCRtpSender)) {
    return;
  }
  var origGetParameters = window.RTCRtpSender.prototype.getParameters;
  if (origGetParameters) {
    window.RTCRtpSender.prototype.getParameters = function getParameters() {
      var params = origGetParameters.apply(this, arguments);
      if (!('encodings' in params)) {
        params.encodings = [].concat(this.sendEncodings || [{}]);
      }
      return params;
    };
  }
}

function shimCreateOffer(window) {
  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
  // Firefox ignores the init sendEncodings options passed to addTransceiver
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
    return;
  }
  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
  window.RTCPeerConnection.prototype.createOffer = function createOffer() {
    var _this4 = this,
        _arguments2 = arguments;

    if (this.setParametersPromises && this.setParametersPromises.length) {
      return Promise.all(this.setParametersPromises).then(function () {
        return origCreateOffer.apply(_this4, _arguments2);
      }).finally(function () {
        _this4.setParametersPromises = [];
      });
    }
    return origCreateOffer.apply(this, arguments);
  };
}

function shimCreateAnswer(window) {
  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
  // Firefox ignores the init sendEncodings options passed to addTransceiver
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
    return;
  }
  var origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;
  window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {
    var _this5 = this,
        _arguments3 = arguments;

    if (this.setParametersPromises && this.setParametersPromises.length) {
      return Promise.all(this.setParametersPromises).then(function () {
        return origCreateAnswer.apply(_this5, _arguments3);
      }).finally(function () {
        _this5.setParametersPromises = [];
      });
    }
    return origCreateAnswer.apply(this, arguments);
  };
}

},{"../utils":11,"./getdisplaymedia":8,"./getusermedia":9}],8:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = shimGetDisplayMedia;
function shimGetDisplayMedia(window, preferredMediaSource) {
  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
    return;
  }
  if (!window.navigator.mediaDevices) {
    return;
  }
  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
    if (!(constraints && constraints.video)) {
      var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');
      err.name = 'NotFoundError';
      // from https://heycam.github.io/webidl/#idl-DOMException-error-names
      err.code = 8;
      return Promise.reject(err);
    }
    if (constraints.video === true) {
      constraints.video = { mediaSource: preferredMediaSource };
    } else {
      constraints.video.mediaSource = preferredMediaSource;
    }
    return window.navigator.mediaDevices.getUserMedia(constraints);
  };
}

},{}],9:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.shimGetUserMedia = shimGetUserMedia;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function shimGetUserMedia(window, browserDetails) {
  var navigator = window && window.navigator;
  var MediaStreamTrack = window && window.MediaStreamTrack;

  navigator.getUserMedia = function (constraints, onSuccess, onError) {
    // Replace Firefox 44+'s deprecation warning with unprefixed version.
    utils.deprecated('navigator.getUserMedia', 'navigator.mediaDevices.getUserMedia');
    navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
  };

  if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
    var remap = function remap(obj, a, b) {
      if (a in obj && !(b in obj)) {
        obj[b] = obj[a];
        delete obj[a];
      }
    };

    var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
    navigator.mediaDevices.getUserMedia = function (c) {
      if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object' && _typeof(c.audio) === 'object') {
        c = JSON.parse(JSON.stringify(c));
        remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
        remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
      }
      return nativeGetUserMedia(c);
    };

    if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
      var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
      MediaStreamTrack.prototype.getSettings = function () {
        var obj = nativeGetSettings.apply(this, arguments);
        remap(obj, 'mozAutoGainControl', 'autoGainControl');
        remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
        return obj;
      };
    }

    if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
      var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
      MediaStreamTrack.prototype.applyConstraints = function (c) {
        if (this.kind === 'audio' && (typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object') {
          c = JSON.parse(JSON.stringify(c));
          remap(c, 'autoGainControl', 'mozAutoGainControl');
          remap(c, 'noiseSuppression', 'mozNoiseSuppression');
        }
        return nativeApplyConstraints.apply(this, [c]);
      };
    }
  }
}

},{"../utils":11}],10:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
exports.shimCallbacksAPI = shimCallbacksAPI;
exports.shimGetUserMedia = shimGetUserMedia;
exports.shimConstraints = shimConstraints;
exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
exports.shimCreateOfferLegacy = shimCreateOfferLegacy;
exports.shimAudioContext = shimAudioContext;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function shimLocalStreamsAPI(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  if (!('getLocalStreams' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
      if (!this._localStreams) {
        this._localStreams = [];
      }
      return this._localStreams;
    };
  }
  if (!('addStream' in window.RTCPeerConnection.prototype)) {
    var _addTrack = window.RTCPeerConnection.prototype.addTrack;
    window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
      var _this = this;

      if (!this._localStreams) {
        this._localStreams = [];
      }
      if (!this._localStreams.includes(stream)) {
        this._localStreams.push(stream);
      }
      // Try to emulate Chrome's behaviour of adding in audio-video order.
      // Safari orders by track id.
      stream.getAudioTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
      stream.getVideoTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
    };

    window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {
      var _this2 = this;

      for (var _len = arguments.length, streams = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        streams[_key - 1] = arguments[_key];
      }

      if (streams) {
        streams.forEach(function (stream) {
          if (!_this2._localStreams) {
            _this2._localStreams = [stream];
          } else if (!_this2._localStreams.includes(stream)) {
            _this2._localStreams.push(stream);
          }
        });
      }
      return _addTrack.apply(this, arguments);
    };
  }
  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
      var _this3 = this;

      if (!this._localStreams) {
        this._localStreams = [];
      }
      var index = this._localStreams.indexOf(stream);
      if (index === -1) {
        return;
      }
      this._localStreams.splice(index, 1);
      var tracks = stream.getTracks();
      this.getSenders().forEach(function (sender) {
        if (tracks.includes(sender.track)) {
          _this3.removeTrack(sender);
        }
      });
    };
  }
}

function shimRemoteStreamsAPI(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  if (!('getRemoteStreams' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.getRemoteStreams = function getRemoteStreams() {
      return this._remoteStreams ? this._remoteStreams : [];
    };
  }
  if (!('onaddstream' in window.RTCPeerConnection.prototype)) {
    Object.defineProperty(window.RTCPeerConnection.prototype, 'onaddstream', {
      get: function get() {
        return this._onaddstream;
      },
      set: function set(f) {
        var _this4 = this;

        if (this._onaddstream) {
          this.removeEventListener('addstream', this._onaddstream);
          this.removeEventListener('track', this._onaddstreampoly);
        }
        this.addEventListener('addstream', this._onaddstream = f);
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!_this4._remoteStreams) {
              _this4._remoteStreams = [];
            }
            if (_this4._remoteStreams.includes(stream)) {
              return;
            }
            _this4._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            _this4.dispatchEvent(event);
          });
        });
      }
    });
    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
      var pc = this;
      if (!this._onaddstreampoly) {
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!pc._remoteStreams) {
              pc._remoteStreams = [];
            }
            if (pc._remoteStreams.indexOf(stream) >= 0) {
              return;
            }
            pc._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            pc.dispatchEvent(event);
          });
        });
      }
      return origSetRemoteDescription.apply(pc, arguments);
    };
  }
}

function shimCallbacksAPI(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  var prototype = window.RTCPeerConnection.prototype;
  var origCreateOffer = prototype.createOffer;
  var origCreateAnswer = prototype.createAnswer;
  var setLocalDescription = prototype.setLocalDescription;
  var setRemoteDescription = prototype.setRemoteDescription;
  var addIceCandidate = prototype.addIceCandidate;

  prototype.createOffer = function createOffer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateOffer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };

  prototype.createAnswer = function createAnswer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateAnswer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };

  var withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setLocalDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setLocalDescription = withCallback;

  withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setRemoteDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setRemoteDescription = withCallback;

  withCallback = function withCallback(candidate, successCallback, failureCallback) {
    var promise = addIceCandidate.apply(this, [candidate]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.addIceCandidate = withCallback;
}

function shimGetUserMedia(window) {
  var navigator = window && window.navigator;

  if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    // shim not needed in Safari 12.1
    var mediaDevices = navigator.mediaDevices;
    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
    navigator.mediaDevices.getUserMedia = function (constraints) {
      return _getUserMedia(shimConstraints(constraints));
    };
  }

  if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {
      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
    }.bind(navigator);
  }
}

function shimConstraints(constraints) {
  if (constraints && constraints.video !== undefined) {
    return Object.assign({}, constraints, { video: utils.compactObject(constraints.video) });
  }

  return constraints;
}

function shimRTCIceServerUrls(window) {
  if (!window.RTCPeerConnection) {
    return;
  }
  // migrate from non-spec RTCIceServer.url to RTCIceServer.urls
  var OrigPeerConnection = window.RTCPeerConnection;
  window.RTCPeerConnection = function RTCPeerConnection(pcConfig, pcConstraints) {
    if (pcConfig && pcConfig.iceServers) {
      var newIceServers = [];
      for (var i = 0; i < pcConfig.iceServers.length; i++) {
        var server = pcConfig.iceServers[i];
        if (!server.hasOwnProperty('urls') && server.hasOwnProperty('url')) {
          utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
          server = JSON.parse(JSON.stringify(server));
          server.urls = server.url;
          delete server.url;
          newIceServers.push(server);
        } else {
          newIceServers.push(pcConfig.iceServers[i]);
        }
      }
      pcConfig.iceServers = newIceServers;
    }
    return new OrigPeerConnection(pcConfig, pcConstraints);
  };
  window.RTCPeerConnection.prototype = OrigPeerConnection.prototype;
  // wrap static methods. Currently just generateCertificate.
  if ('generateCertificate' in OrigPeerConnection) {
    Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
      get: function get() {
        return OrigPeerConnection.generateCertificate;
      }
    });
  }
}

function shimTrackEventTransceiver(window) {
  // Add event.transceiver member over deprecated event.receiver
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
      get: function get() {
        return { receiver: this.receiver };
      }
    });
  }
}

function shimCreateOfferLegacy(window) {
  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
  window.RTCPeerConnection.prototype.createOffer = function createOffer(offerOptions) {
    if (offerOptions) {
      if (typeof offerOptions.offerToReceiveAudio !== 'undefined') {
        // support bit values
        offerOptions.offerToReceiveAudio = !!offerOptions.offerToReceiveAudio;
      }
      var audioTransceiver = this.getTransceivers().find(function (transceiver) {
        return transceiver.receiver.track.kind === 'audio';
      });
      if (offerOptions.offerToReceiveAudio === false && audioTransceiver) {
        if (audioTransceiver.direction === 'sendrecv') {
          if (audioTransceiver.setDirection) {
            audioTransceiver.setDirection('sendonly');
          } else {
            audioTransceiver.direction = 'sendonly';
          }
        } else if (audioTransceiver.direction === 'recvonly') {
          if (audioTransceiver.setDirection) {
            audioTransceiver.setDirection('inactive');
          } else {
            audioTransceiver.direction = 'inactive';
          }
        }
      } else if (offerOptions.offerToReceiveAudio === true && !audioTransceiver) {
        this.addTransceiver('audio', { direction: 'recvonly' });
      }

      if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
        // support bit values
        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
      }
      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
        return transceiver.receiver.track.kind === 'video';
      });
      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
        if (videoTransceiver.direction === 'sendrecv') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('sendonly');
          } else {
            videoTransceiver.direction = 'sendonly';
          }
        } else if (videoTransceiver.direction === 'recvonly') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('inactive');
          } else {
            videoTransceiver.direction = 'inactive';
          }
        }
      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
        this.addTransceiver('video', { direction: 'recvonly' });
      }
    }
    return origCreateOffer.apply(this, arguments);
  };
}

function shimAudioContext(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || window.AudioContext) {
    return;
  }
  window.AudioContext = window.webkitAudioContext;
}

},{"../utils":11}],11:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

exports.extractVersion = extractVersion;
exports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;
exports.disableLog = disableLog;
exports.disableWarnings = disableWarnings;
exports.log = log;
exports.deprecated = deprecated;
exports.detectBrowser = detectBrowser;
exports.compactObject = compactObject;
exports.walkStats = walkStats;
exports.filterStats = filterStats;

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var logDisabled_ = true;
var deprecationWarnings_ = true;

/**
 * Extract browser version out of the provided user agent string.
 *
 * @param {!string} uastring userAgent string.
 * @param {!string} expr Regular expression used as match criteria.
 * @param {!number} pos position in the version string to be returned.
 * @return {!number} browser version.
 */
function extractVersion(uastring, expr, pos) {
  var match = uastring.match(expr);
  return match && match.length >= pos && parseInt(match[pos], 10);
}

// Wraps the peerconnection event eventNameToWrap in a function
// which returns the modified event object (or false to prevent
// the event).
function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
  if (!window.RTCPeerConnection) {
    return;
  }
  var proto = window.RTCPeerConnection.prototype;
  var nativeAddEventListener = proto.addEventListener;
  proto.addEventListener = function (nativeEventName, cb) {
    if (nativeEventName !== eventNameToWrap) {
      return nativeAddEventListener.apply(this, arguments);
    }
    var wrappedCallback = function wrappedCallback(e) {
      var modifiedEvent = wrapper(e);
      if (modifiedEvent) {
        if (cb.handleEvent) {
          cb.handleEvent(modifiedEvent);
        } else {
          cb(modifiedEvent);
        }
      }
    };
    this._eventMap = this._eventMap || {};
    if (!this._eventMap[eventNameToWrap]) {
      this._eventMap[eventNameToWrap] = new Map();
    }
    this._eventMap[eventNameToWrap].set(cb, wrappedCallback);
    return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);
  };

  var nativeRemoveEventListener = proto.removeEventListener;
  proto.removeEventListener = function (nativeEventName, cb) {
    if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[eventNameToWrap]) {
      return nativeRemoveEventListener.apply(this, arguments);
    }
    if (!this._eventMap[eventNameToWrap].has(cb)) {
      return nativeRemoveEventListener.apply(this, arguments);
    }
    var unwrappedCb = this._eventMap[eventNameToWrap].get(cb);
    this._eventMap[eventNameToWrap].delete(cb);
    if (this._eventMap[eventNameToWrap].size === 0) {
      delete this._eventMap[eventNameToWrap];
    }
    if (Object.keys(this._eventMap).length === 0) {
      delete this._eventMap;
    }
    return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);
  };

  Object.defineProperty(proto, 'on' + eventNameToWrap, {
    get: function get() {
      return this['_on' + eventNameToWrap];
    },
    set: function set(cb) {
      if (this['_on' + eventNameToWrap]) {
        this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);
        delete this['_on' + eventNameToWrap];
      }
      if (cb) {
        this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);
      }
    },

    enumerable: true,
    configurable: true
  });
}

function disableLog(bool) {
  if (typeof bool !== 'boolean') {
    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
  }
  logDisabled_ = bool;
  return bool ? 'adapter.js logging disabled' : 'adapter.js logging enabled';
}

/**
 * Disable or enable deprecation warnings
 * @param {!boolean} bool set to true to disable warnings.
 */
function disableWarnings(bool) {
  if (typeof bool !== 'boolean') {
    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
  }
  deprecationWarnings_ = !bool;
  return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
}

function log() {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object') {
    if (logDisabled_) {
      return;
    }
    if (typeof console !== 'undefined' && typeof console.log === 'function') {
      console.log.apply(console, arguments);
    }
  }
}

/**
 * Shows a deprecation warning suggesting the modern and spec-compatible API.
 */
function deprecated(oldMethod, newMethod) {
  if (!deprecationWarnings_) {
    return;
  }
  console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');
}

/**
 * Browser detector.
 *
 * @return {object} result containing browser and version
 *     properties.
 */
function detectBrowser(window) {
  // Returned result object.
  var result = { browser: null, version: null };

  // Fail early if it's not a browser
  if (typeof window === 'undefined' || !window.navigator) {
    result.browser = 'Not a browser.';
    return result;
  }

  var navigator = window.navigator;


  if (navigator.mozGetUserMedia) {
    // Firefox.
    result.browser = 'firefox';
    result.version = extractVersion(navigator.userAgent, /Firefox\/(\d+)\./, 1);
  } else if (navigator.webkitGetUserMedia || window.isSecureContext === false && window.webkitRTCPeerConnection && !window.RTCIceGatherer) {
    // Chrome, Chromium, Webview, Opera.
    // Version matches Chrome/WebRTC version.
    // Chrome 74 removed webkitGetUserMedia on http as well so we need the
    // more complicated fallback to webkitRTCPeerConnection.
    result.browser = 'chrome';
    result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\/(\d+)\./, 2);
  } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) {
    // Safari.
    result.browser = 'safari';
    result.version = extractVersion(navigator.userAgent, /AppleWebKit\/(\d+)\./, 1);
    result.supportsUnifiedPlan = window.RTCRtpTransceiver && 'currentDirection' in window.RTCRtpTransceiver.prototype;
  } else {
    // Default fallthrough: not supported.
    result.browser = 'Not a supported browser.';
    return result;
  }

  return result;
}

/**
 * Checks if something is an object.
 *
 * @param {*} val The something you want to check.
 * @return true if val is an object, false otherwise.
 */
function isObject(val) {
  return Object.prototype.toString.call(val) === '[object Object]';
}

/**
 * Remove all empty objects and undefined values
 * from a nested object -- an enhanced and vanilla version
 * of Lodash's `compact`.
 */
function compactObject(data) {
  if (!isObject(data)) {
    return data;
  }

  return Object.keys(data).reduce(function (accumulator, key) {
    var isObj = isObject(data[key]);
    var value = isObj ? compactObject(data[key]) : data[key];
    var isEmptyObject = isObj && !Object.keys(value).length;
    if (value === undefined || isEmptyObject) {
      return accumulator;
    }
    return Object.assign(accumulator, _defineProperty({}, key, value));
  }, {});
}

/* iterates the stats graph recursively. */
function walkStats(stats, base, resultSet) {
  if (!base || resultSet.has(base.id)) {
    return;
  }
  resultSet.set(base.id, base);
  Object.keys(base).forEach(function (name) {
    if (name.endsWith('Id')) {
      walkStats(stats, stats.get(base[name]), resultSet);
    } else if (name.endsWith('Ids')) {
      base[name].forEach(function (id) {
        walkStats(stats, stats.get(id), resultSet);
      });
    }
  });
}

/* filter getStats for a sender/receiver track. */
function filterStats(result, track, outbound) {
  var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
  var filteredResult = new Map();
  if (track === null) {
    return filteredResult;
  }
  var trackStats = [];
  result.forEach(function (value) {
    if (value.type === 'track' && value.trackIdentifier === track.id) {
      trackStats.push(value);
    }
  });
  trackStats.forEach(function (trackStat) {
    result.forEach(function (stats) {
      if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
        walkStats(result, stats, filteredResult);
      }
    });
  });
  return filteredResult;
}

},{}],12:[function(require,module,exports){
/* eslint-env node */
'use strict';

// SDP helpers.

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var SDPUtils = {};

// Generate an alphanumeric identifier for cname or mids.
// TODO: use UUIDs instead? https://gist.github.com/jed/982883
SDPUtils.generateIdentifier = function () {
  return Math.random().toString(36).substr(2, 10);
};

// The RTCP CNAME used by all peerconnections from the same JS.
SDPUtils.localCName = SDPUtils.generateIdentifier();

// Splits SDP into lines, dealing with both CRLF and LF.
SDPUtils.splitLines = function (blob) {
  return blob.trim().split('\n').map(function (line) {
    return line.trim();
  });
};
// Splits SDP into sessionpart and mediasections. Ensures CRLF.
SDPUtils.splitSections = function (blob) {
  var parts = blob.split('\nm=');
  return parts.map(function (part, index) {
    return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
  });
};

// Returns the session description.
SDPUtils.getDescription = function (blob) {
  var sections = SDPUtils.splitSections(blob);
  return sections && sections[0];
};

// Returns the individual media sections.
SDPUtils.getMediaSections = function (blob) {
  var sections = SDPUtils.splitSections(blob);
  sections.shift();
  return sections;
};

// Returns lines that start with a certain prefix.
SDPUtils.matchPrefix = function (blob, prefix) {
  return SDPUtils.splitLines(blob).filter(function (line) {
    return line.indexOf(prefix) === 0;
  });
};

// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
// Input can be prefixed with a=.
SDPUtils.parseCandidate = function (line) {
  var parts = void 0;
  // Parse both variants.
  if (line.indexOf('a=candidate:') === 0) {
    parts = line.substring(12).split(' ');
  } else {
    parts = line.substring(10).split(' ');
  }

  var candidate = {
    foundation: parts[0],
    component: { 1: 'rtp', 2: 'rtcp' }[parts[1]] || parts[1],
    protocol: parts[2].toLowerCase(),
    priority: parseInt(parts[3], 10),
    ip: parts[4],
    address: parts[4], // address is an alias for ip.
    port: parseInt(parts[5], 10),
    // skip parts[6] == 'typ'
    type: parts[7]
  };

  for (var i = 8; i < parts.length; i += 2) {
    switch (parts[i]) {
      case 'raddr':
        candidate.relatedAddress = parts[i + 1];
        break;
      case 'rport':
        candidate.relatedPort = parseInt(parts[i + 1], 10);
        break;
      case 'tcptype':
        candidate.tcpType = parts[i + 1];
        break;
      case 'ufrag':
        candidate.ufrag = parts[i + 1]; // for backward compatibility.
        candidate.usernameFragment = parts[i + 1];
        break;
      default:
        // extension handling, in particular ufrag. Don't overwrite.
        if (candidate[parts[i]] === undefined) {
          candidate[parts[i]] = parts[i + 1];
        }
        break;
    }
  }
  return candidate;
};

// Translates a candidate object into SDP candidate attribute.
// This does not include the a= prefix!
SDPUtils.writeCandidate = function (candidate) {
  var sdp = [];
  sdp.push(candidate.foundation);

  var component = candidate.component;
  if (component === 'rtp') {
    sdp.push(1);
  } else if (component === 'rtcp') {
    sdp.push(2);
  } else {
    sdp.push(component);
  }
  sdp.push(candidate.protocol.toUpperCase());
  sdp.push(candidate.priority);
  sdp.push(candidate.address || candidate.ip);
  sdp.push(candidate.port);

  var type = candidate.type;
  sdp.push('typ');
  sdp.push(type);
  if (type !== 'host' && candidate.relatedAddress && candidate.relatedPort) {
    sdp.push('raddr');
    sdp.push(candidate.relatedAddress);
    sdp.push('rport');
    sdp.push(candidate.relatedPort);
  }
  if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
    sdp.push('tcptype');
    sdp.push(candidate.tcpType);
  }
  if (candidate.usernameFragment || candidate.ufrag) {
    sdp.push('ufrag');
    sdp.push(candidate.usernameFragment || candidate.ufrag);
  }
  return 'candidate:' + sdp.join(' ');
};

// Parses an ice-options line, returns an array of option tags.
// Sample input:
// a=ice-options:foo bar
SDPUtils.parseIceOptions = function (line) {
  return line.substr(14).split(' ');
};

// Parses a rtpmap line, returns RTCRtpCoddecParameters. Sample input:
// a=rtpmap:111 opus/48000/2
SDPUtils.parseRtpMap = function (line) {
  var parts = line.substr(9).split(' ');
  var parsed = {
    payloadType: parseInt(parts.shift(), 10) // was: id
  };

  parts = parts[0].split('/');

  parsed.name = parts[0];
  parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
  parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
  // legacy alias, got renamed back to channels in ORTC.
  parsed.numChannels = parsed.channels;
  return parsed;
};

// Generates a rtpmap line from RTCRtpCodecCapability or
// RTCRtpCodecParameters.
SDPUtils.writeRtpMap = function (codec) {
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  var channels = codec.channels || codec.numChannels || 1;
  return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate + (channels !== 1 ? '/' + channels : '') + '\r\n';
};

// Parses a extmap line (headerextension from RFC 5285). Sample input:
// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
SDPUtils.parseExtmap = function (line) {
  var parts = line.substr(9).split(' ');
  return {
    id: parseInt(parts[0], 10),
    direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
    uri: parts[1]
  };
};

// Generates an extmap line from RTCRtpHeaderExtensionParameters or
// RTCRtpHeaderExtension.
SDPUtils.writeExtmap = function (headerExtension) {
  return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) + (headerExtension.direction && headerExtension.direction !== 'sendrecv' ? '/' + headerExtension.direction : '') + ' ' + headerExtension.uri + '\r\n';
};

// Parses a fmtp line, returns dictionary. Sample input:
// a=fmtp:96 vbr=on;cng=on
// Also deals with vbr=on; cng=on
SDPUtils.parseFmtp = function (line) {
  var parsed = {};
  var kv = void 0;
  var parts = line.substr(line.indexOf(' ') + 1).split(';');
  for (var j = 0; j < parts.length; j++) {
    kv = parts[j].trim().split('=');
    parsed[kv[0].trim()] = kv[1];
  }
  return parsed;
};

// Generates a fmtp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeFmtp = function (codec) {
  var line = '';
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  if (codec.parameters && Object.keys(codec.parameters).length) {
    var params = [];
    Object.keys(codec.parameters).forEach(function (param) {
      if (codec.parameters[param] !== undefined) {
        params.push(param + '=' + codec.parameters[param]);
      } else {
        params.push(param);
      }
    });
    line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
  }
  return line;
};

// Parses a rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
// a=rtcp-fb:98 nack rpsi
SDPUtils.parseRtcpFb = function (line) {
  var parts = line.substr(line.indexOf(' ') + 1).split(' ');
  return {
    type: parts.shift(),
    parameter: parts.join(' ')
  };
};

// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeRtcpFb = function (codec) {
  var lines = '';
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
    // FIXME: special handling for trr-int?
    codec.rtcpFeedback.forEach(function (fb) {
      lines += 'a=rtcp-fb:' + pt + ' ' + fb.type + (fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') + '\r\n';
    });
  }
  return lines;
};

// Parses a RFC 5576 ssrc media attribute. Sample input:
// a=ssrc:3735928559 cname:something
SDPUtils.parseSsrcMedia = function (line) {
  var sp = line.indexOf(' ');
  var parts = {
    ssrc: parseInt(line.substr(7, sp - 7), 10)
  };
  var colon = line.indexOf(':', sp);
  if (colon > -1) {
    parts.attribute = line.substr(sp + 1, colon - sp - 1);
    parts.value = line.substr(colon + 1);
  } else {
    parts.attribute = line.substr(sp + 1);
  }
  return parts;
};

// Parse a ssrc-group line (see RFC 5576). Sample input:
// a=ssrc-group:semantics 12 34
SDPUtils.parseSsrcGroup = function (line) {
  var parts = line.substr(13).split(' ');
  return {
    semantics: parts.shift(),
    ssrcs: parts.map(function (ssrc) {
      return parseInt(ssrc, 10);
    })
  };
};

// Extracts the MID (RFC 5888) from a media section.
// Returns the MID or undefined if no mid line was found.
SDPUtils.getMid = function (mediaSection) {
  var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
  if (mid) {
    return mid.substr(6);
  }
};

// Parses a fingerprint line for DTLS-SRTP.
SDPUtils.parseFingerprint = function (line) {
  var parts = line.substr(14).split(' ');
  return {
    algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
    value: parts[1].toUpperCase() // the definition is upper-case in RFC 4572.
  };
};

// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the fingerprint line as input. See also getIceParameters.
SDPUtils.getDtlsParameters = function (mediaSection, sessionpart) {
  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=fingerprint:');
  // Note: a=setup line is ignored since we use the 'auto' role in Edge.
  return {
    role: 'auto',
    fingerprints: lines.map(SDPUtils.parseFingerprint)
  };
};

// Serializes DTLS parameters to SDP.
SDPUtils.writeDtlsParameters = function (params, setupType) {
  var sdp = 'a=setup:' + setupType + '\r\n';
  params.fingerprints.forEach(function (fp) {
    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
  });
  return sdp;
};

// Parses a=crypto lines into
//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members
SDPUtils.parseCryptoLine = function (line) {
  var parts = line.substr(9).split(' ');
  return {
    tag: parseInt(parts[0], 10),
    cryptoSuite: parts[1],
    keyParams: parts[2],
    sessionParams: parts.slice(3)
  };
};

SDPUtils.writeCryptoLine = function (parameters) {
  return 'a=crypto:' + parameters.tag + ' ' + parameters.cryptoSuite + ' ' + (_typeof(parameters.keyParams) === 'object' ? SDPUtils.writeCryptoKeyParams(parameters.keyParams) : parameters.keyParams) + (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') + '\r\n';
};

// Parses the crypto key parameters into
//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*
SDPUtils.parseCryptoKeyParams = function (keyParams) {
  if (keyParams.indexOf('inline:') !== 0) {
    return null;
  }
  var parts = keyParams.substr(7).split('|');
  return {
    keyMethod: 'inline',
    keySalt: parts[0],
    lifeTime: parts[1],
    mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,
    mkiLength: parts[2] ? parts[2].split(':')[1] : undefined
  };
};

SDPUtils.writeCryptoKeyParams = function (keyParams) {
  return keyParams.keyMethod + ':' + keyParams.keySalt + (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') + (keyParams.mkiValue && keyParams.mkiLength ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength : '');
};

// Extracts all SDES parameters.
SDPUtils.getCryptoParameters = function (mediaSection, sessionpart) {
  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=crypto:');
  return lines.map(SDPUtils.parseCryptoLine);
};

// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the ice-ufrag and ice-pwd lines as input.
SDPUtils.getIceParameters = function (mediaSection, sessionpart) {
  var ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-ufrag:')[0];
  var pwd = SDPUtils.matchPrefix(mediaSection + sessionpart, 'a=ice-pwd:')[0];
  if (!(ufrag && pwd)) {
    return null;
  }
  return {
    usernameFragment: ufrag.substr(12),
    password: pwd.substr(10)
  };
};

// Serializes ICE parameters to SDP.
SDPUtils.writeIceParameters = function (params) {
  var sdp = 'a=ice-ufrag:' + params.usernameFragment + '\r\n' + 'a=ice-pwd:' + params.password + '\r\n';
  if (params.iceLite) {
    sdp += 'a=ice-lite\r\n';
  }
  return sdp;
};

// Parses the SDP media section and returns RTCRtpParameters.
SDPUtils.parseRtpParameters = function (mediaSection) {
  var description = {
    codecs: [],
    headerExtensions: [],
    fecMechanisms: [],
    rtcp: []
  };
  var lines = SDPUtils.splitLines(mediaSection);
  var mline = lines[0].split(' ');
  for (var i = 3; i < mline.length; i++) {
    // find all codecs from mline[3..]
    var pt = mline[i];
    var rtpmapline = SDPUtils.matchPrefix(mediaSection, 'a=rtpmap:' + pt + ' ')[0];
    if (rtpmapline) {
      var codec = SDPUtils.parseRtpMap(rtpmapline);
      var fmtps = SDPUtils.matchPrefix(mediaSection, 'a=fmtp:' + pt + ' ');
      // Only the first a=fmtp:<pt> is considered.
      codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
      codec.rtcpFeedback = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-fb:' + pt + ' ').map(SDPUtils.parseRtcpFb);
      description.codecs.push(codec);
      // parse FEC mechanisms from rtpmap lines.
      switch (codec.name.toUpperCase()) {
        case 'RED':
        case 'ULPFEC':
          description.fecMechanisms.push(codec.name.toUpperCase());
          break;
        default:
          // only RED and ULPFEC are recognized as FEC mechanisms.
          break;
      }
    }
  }
  SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function (line) {
    description.headerExtensions.push(SDPUtils.parseExtmap(line));
  });
  // FIXME: parse rtcp.
  return description;
};

// Generates parts of the SDP media section describing the capabilities /
// parameters.
SDPUtils.writeRtpDescription = function (kind, caps) {
  var sdp = '';

  // Build the mline.
  sdp += 'm=' + kind + ' ';
  sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
  sdp += ' UDP/TLS/RTP/SAVPF ';
  sdp += caps.codecs.map(function (codec) {
    if (codec.preferredPayloadType !== undefined) {
      return codec.preferredPayloadType;
    }
    return codec.payloadType;
  }).join(' ') + '\r\n';

  sdp += 'c=IN IP4 0.0.0.0\r\n';
  sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';

  // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
  caps.codecs.forEach(function (codec) {
    sdp += SDPUtils.writeRtpMap(codec);
    sdp += SDPUtils.writeFmtp(codec);
    sdp += SDPUtils.writeRtcpFb(codec);
  });
  var maxptime = 0;
  caps.codecs.forEach(function (codec) {
    if (codec.maxptime > maxptime) {
      maxptime = codec.maxptime;
    }
  });
  if (maxptime > 0) {
    sdp += 'a=maxptime:' + maxptime + '\r\n';
  }

  if (caps.headerExtensions) {
    caps.headerExtensions.forEach(function (extension) {
      sdp += SDPUtils.writeExtmap(extension);
    });
  }
  // FIXME: write fecMechanisms.
  return sdp;
};

// Parses the SDP media section and returns an array of
// RTCRtpEncodingParameters.
SDPUtils.parseRtpEncodingParameters = function (mediaSection) {
  var encodingParameters = [];
  var description = SDPUtils.parseRtpParameters(mediaSection);
  var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
  var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;

  // filter a=ssrc:... cname:, ignore PlanB-msid
  var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
    return SDPUtils.parseSsrcMedia(line);
  }).filter(function (parts) {
    return parts.attribute === 'cname';
  });
  var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
  var secondarySsrc = void 0;

  var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID').map(function (line) {
    var parts = line.substr(17).split(' ');
    return parts.map(function (part) {
      return parseInt(part, 10);
    });
  });
  if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
    secondarySsrc = flows[0][1];
  }

  description.codecs.forEach(function (codec) {
    if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
      var encParam = {
        ssrc: primarySsrc,
        codecPayloadType: parseInt(codec.parameters.apt, 10)
      };
      if (primarySsrc && secondarySsrc) {
        encParam.rtx = { ssrc: secondarySsrc };
      }
      encodingParameters.push(encParam);
      if (hasRed) {
        encParam = JSON.parse(JSON.stringify(encParam));
        encParam.fec = {
          ssrc: primarySsrc,
          mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
        };
        encodingParameters.push(encParam);
      }
    }
  });
  if (encodingParameters.length === 0 && primarySsrc) {
    encodingParameters.push({
      ssrc: primarySsrc
    });
  }

  // we support both b=AS and b=TIAS but interpret AS as TIAS.
  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
  if (bandwidth.length) {
    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
      bandwidth = parseInt(bandwidth[0].substr(7), 10);
    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
      // use formula from JSEP to convert b=AS to TIAS value.
      bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95 - 50 * 40 * 8;
    } else {
      bandwidth = undefined;
    }
    encodingParameters.forEach(function (params) {
      params.maxBitrate = bandwidth;
    });
  }
  return encodingParameters;
};

// parses http://draft.ortc.org/#rtcrtcpparameters*
SDPUtils.parseRtcpParameters = function (mediaSection) {
  var rtcpParameters = {};

  // Gets the first SSRC. Note that with RTX there might be multiple
  // SSRCs.
  var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
    return SDPUtils.parseSsrcMedia(line);
  }).filter(function (obj) {
    return obj.attribute === 'cname';
  })[0];
  if (remoteSsrc) {
    rtcpParameters.cname = remoteSsrc.value;
    rtcpParameters.ssrc = remoteSsrc.ssrc;
  }

  // Edge uses the compound attribute instead of reducedSize
  // compound is !reducedSize
  var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
  rtcpParameters.reducedSize = rsize.length > 0;
  rtcpParameters.compound = rsize.length === 0;

  // parses the rtcp-mux attrіbute.
  // Note that Edge does not support unmuxed RTCP.
  var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
  rtcpParameters.mux = mux.length > 0;

  return rtcpParameters;
};

SDPUtils.writeRtcpParameters = function (rtcpParameters) {
  var sdp = '';
  if (rtcpParameters.reducedSize) {
    sdp += 'a=rtcp-rsize\r\n';
  }
  if (rtcpParameters.mux) {
    sdp += 'a=rtcp-mux\r\n';
  }
  if (rtcpParameters.ssrc !== undefined && rtcpParameters.cname) {
    sdp += 'a=ssrc:' + rtcpParameters.ssrc + ' cname:' + rtcpParameters.cname + '\r\n';
  }
  return sdp;
};

// parses either a=msid: or a=ssrc:... msid lines and returns
// the id of the MediaStream and MediaStreamTrack.
SDPUtils.parseMsid = function (mediaSection) {
  var parts = void 0;
  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
  if (spec.length === 1) {
    parts = spec[0].substr(7).split(' ');
    return { stream: parts[0], track: parts[1] };
  }
  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:').map(function (line) {
    return SDPUtils.parseSsrcMedia(line);
  }).filter(function (msidParts) {
    return msidParts.attribute === 'msid';
  });
  if (planB.length > 0) {
    parts = planB[0].value.split(' ');
    return { stream: parts[0], track: parts[1] };
  }
};

// SCTP
// parses draft-ietf-mmusic-sctp-sdp-26 first and falls back
// to draft-ietf-mmusic-sctp-sdp-05
SDPUtils.parseSctpDescription = function (mediaSection) {
  var mline = SDPUtils.parseMLine(mediaSection);
  var maxSizeLine = SDPUtils.matchPrefix(mediaSection, 'a=max-message-size:');
  var maxMessageSize = void 0;
  if (maxSizeLine.length > 0) {
    maxMessageSize = parseInt(maxSizeLine[0].substr(19), 10);
  }
  if (isNaN(maxMessageSize)) {
    maxMessageSize = 65536;
  }
  var sctpPort = SDPUtils.matchPrefix(mediaSection, 'a=sctp-port:');
  if (sctpPort.length > 0) {
    return {
      port: parseInt(sctpPort[0].substr(12), 10),
      protocol: mline.fmt,
      maxMessageSize: maxMessageSize
    };
  }
  var sctpMapLines = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:');
  if (sctpMapLines.length > 0) {
    var parts = sctpMapLines[0].substr(10).split(' ');
    return {
      port: parseInt(parts[0], 10),
      protocol: parts[1],
      maxMessageSize: maxMessageSize
    };
  }
};

// SCTP
// outputs the draft-ietf-mmusic-sctp-sdp-26 version that all browsers
// support by now receiving in this format, unless we originally parsed
// as the draft-ietf-mmusic-sctp-sdp-05 format (indicated by the m-line
// protocol of DTLS/SCTP -- without UDP/ or TCP/)
SDPUtils.writeSctpDescription = function (media, sctp) {
  var output = [];
  if (media.protocol !== 'DTLS/SCTP') {
    output = ['m=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.protocol + '\r\n', 'c=IN IP4 0.0.0.0\r\n', 'a=sctp-port:' + sctp.port + '\r\n'];
  } else {
    output = ['m=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.port + '\r\n', 'c=IN IP4 0.0.0.0\r\n', 'a=sctpmap:' + sctp.port + ' ' + sctp.protocol + ' 65535\r\n'];
  }
  if (sctp.maxMessageSize !== undefined) {
    output.push('a=max-message-size:' + sctp.maxMessageSize + '\r\n');
  }
  return output.join('');
};

// Generate a session ID for SDP.
// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
// recommends using a cryptographically random +ve 64-bit value
// but right now this should be acceptable and within the right range
SDPUtils.generateSessionId = function () {
  return Math.random().toString().substr(2, 21);
};

// Write boiler plate for start of SDP
// sessId argument is optional - if not supplied it will
// be generated randomly
// sessVersion is optional and defaults to 2
// sessUser is optional and defaults to 'thisisadapterortc'
SDPUtils.writeSessionBoilerplate = function (sessId, sessVer, sessUser) {
  var sessionId = void 0;
  var version = sessVer !== undefined ? sessVer : 2;
  if (sessId) {
    sessionId = sessId;
  } else {
    sessionId = SDPUtils.generateSessionId();
  }
  var user = sessUser || 'thisisadapterortc';
  // FIXME: sess-id should be an NTP timestamp.
  return 'v=0\r\n' + 'o=' + user + ' ' + sessionId + ' ' + version + ' IN IP4 127.0.0.1\r\n' + 's=-\r\n' + 't=0 0\r\n';
};

// Gets the direction from the mediaSection or the sessionpart.
SDPUtils.getDirection = function (mediaSection, sessionpart) {
  // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
  var lines = SDPUtils.splitLines(mediaSection);
  for (var i = 0; i < lines.length; i++) {
    switch (lines[i]) {
      case 'a=sendrecv':
      case 'a=sendonly':
      case 'a=recvonly':
      case 'a=inactive':
        return lines[i].substr(2);
      default:
      // FIXME: What should happen here?
    }
  }
  if (sessionpart) {
    return SDPUtils.getDirection(sessionpart);
  }
  return 'sendrecv';
};

SDPUtils.getKind = function (mediaSection) {
  var lines = SDPUtils.splitLines(mediaSection);
  var mline = lines[0].split(' ');
  return mline[0].substr(2);
};

SDPUtils.isRejected = function (mediaSection) {
  return mediaSection.split(' ', 2)[1] === '0';
};

SDPUtils.parseMLine = function (mediaSection) {
  var lines = SDPUtils.splitLines(mediaSection);
  var parts = lines[0].substr(2).split(' ');
  return {
    kind: parts[0],
    port: parseInt(parts[1], 10),
    protocol: parts[2],
    fmt: parts.slice(3).join(' ')
  };
};

SDPUtils.parseOLine = function (mediaSection) {
  var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
  var parts = line.substr(2).split(' ');
  return {
    username: parts[0],
    sessionId: parts[1],
    sessionVersion: parseInt(parts[2], 10),
    netType: parts[3],
    addressType: parts[4],
    address: parts[5]
  };
};

// a very naive interpretation of a valid SDP.
SDPUtils.isValidSDP = function (blob) {
  if (typeof blob !== 'string' || blob.length === 0) {
    return false;
  }
  var lines = SDPUtils.splitLines(blob);
  for (var i = 0; i < lines.length; i++) {
    if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
      return false;
    }
    // TODO: check the modifier a bit more.
  }
  return true;
};

// Expose public methods.
if ((typeof module === 'undefined' ? 'undefined' : _typeof(module)) === 'object') {
  module.exports = SDPUtils;
}
},{}]},{},[1])(1)
});
// __________________
// getHTMLMediaElement.js

function getHTMLMediaElement(mediaElement, config) {
    config = config || {};

    if (!mediaElement.nodeName || (mediaElement.nodeName.toLowerCase() != 'audio' && mediaElement.nodeName.toLowerCase() != 'video')) {
        if (!mediaElement.getVideoTracks().length) {
            return getAudioElement(mediaElement, config);
        }

        var mediaStream = mediaElement;
        mediaElement = document.createElement(mediaStream.getVideoTracks().length ? 'video' : 'audio');

        try {
            mediaElement.setAttributeNode(document.createAttribute('autoplay'));
            mediaElement.setAttributeNode(document.createAttribute('playsinline'));
        } catch (e) {
            mediaElement.setAttribute('autoplay', true);
            mediaElement.setAttribute('playsinline', true);
        }

        if ('srcObject' in mediaElement) {
            mediaElement.srcObject = mediaStream;
        } else {
            mediaElement[!!navigator.mozGetUserMedia ? 'mozSrcObject' : 'src'] = !!navigator.mozGetUserMedia ? mediaStream : (window.URL || window.webkitURL).createObjectURL(mediaStream);
        }
    }

    if (mediaElement.nodeName && mediaElement.nodeName.toLowerCase() == 'audio') {
        return getAudioElement(mediaElement, config);
    }

    var buttons = config.buttons || ['mute-audio', 'mute-video', 'full-screen', 'volume-slider', 'stop'];
    buttons.has = function(element) {
        return buttons.indexOf(element) !== -1;
    };

    config.toggle = config.toggle || [];
    config.toggle.has = function(element) {
        return config.toggle.indexOf(element) !== -1;
    };

    var mediaElementContainer = document.createElement('div');
    mediaElementContainer.className = 'media-container';

    var mediaControls = document.createElement('div');
    mediaControls.className = 'media-controls';
    mediaElementContainer.appendChild(mediaControls);

    if (buttons.has('mute-audio')) {
        var muteAudio = document.createElement('div');
        muteAudio.className = 'control ' + (config.toggle.has('mute-audio') ? 'unmute-audio selected' : 'mute-audio');
        mediaControls.appendChild(muteAudio);

        muteAudio.onclick = function() {
            if (muteAudio.className.indexOf('unmute-audio') != -1) {
                muteAudio.className = muteAudio.className.replace('unmute-audio selected', 'mute-audio');
                mediaElement.muted = false;
                mediaElement.volume = 1;
                if (config.onUnMuted) config.onUnMuted('audio');
            } else {
                muteAudio.className = muteAudio.className.replace('mute-audio', 'unmute-audio selected');
                mediaElement.muted = true;
                mediaElement.volume = 0;
                if (config.onMuted) config.onMuted('audio');
            }
        };
    }

    if (buttons.has('mute-video')) {
        var muteVideo = document.createElement('div');
        muteVideo.className = 'control ' + (config.toggle.has('mute-video') ? 'unmute-video selected' : 'mute-video');
        mediaControls.appendChild(muteVideo);

        muteVideo.onclick = function() {
            if (muteVideo.className.indexOf('unmute-video') != -1) {
                muteVideo.className = muteVideo.className.replace('unmute-video selected', 'mute-video');
                mediaElement.muted = false;
                mediaElement.volume = 1;
                mediaElement.play();
                if (config.onUnMuted) config.onUnMuted('video');
            } else {
                muteVideo.className = muteVideo.className.replace('mute-video', 'unmute-video selected');
                mediaElement.muted = true;
                mediaElement.volume = 0;
                mediaElement.pause();
                if (config.onMuted) config.onMuted('video');
            }
        };
    }

    if (buttons.has('take-snapshot')) {
        var takeSnapshot = document.createElement('div');
        takeSnapshot.className = 'control take-snapshot';
        mediaControls.appendChild(takeSnapshot);

        takeSnapshot.onclick = function() {
            if (config.onTakeSnapshot) config.onTakeSnapshot();
        };
    }

    if (buttons.has('stop')) {
        var stop = document.createElement('div');
        stop.className = 'control stop';
        mediaControls.appendChild(stop);

        stop.onclick = function() {
            mediaElementContainer.style.opacity = 0;
            setTimeout(function() {
                if (mediaElementContainer.parentNode) {
                    mediaElementContainer.parentNode.removeChild(mediaElementContainer);
                }
            }, 800);
            if (config.onStopped) config.onStopped();
        };
    }

    var volumeControl = document.createElement('div');
    volumeControl.className = 'volume-control';

    if (buttons.has('record-audio')) {
        var recordAudio = document.createElement('div');
        recordAudio.className = 'control ' + (config.toggle.has('record-audio') ? 'stop-recording-audio selected' : 'record-audio');
        volumeControl.appendChild(recordAudio);

        recordAudio.onclick = function() {
            if (recordAudio.className.indexOf('stop-recording-audio') != -1) {
                recordAudio.className = recordAudio.className.replace('stop-recording-audio selected', 'record-audio');
                if (config.onRecordingStopped) config.onRecordingStopped('audio');
            } else {
                recordAudio.className = recordAudio.className.replace('record-audio', 'stop-recording-audio selected');
                if (config.onRecordingStarted) config.onRecordingStarted('audio');
            }
        };
    }

    if (buttons.has('record-video')) {
        var recordVideo = document.createElement('div');
        recordVideo.className = 'control ' + (config.toggle.has('record-video') ? 'stop-recording-video selected' : 'record-video');
        volumeControl.appendChild(recordVideo);

        recordVideo.onclick = function() {
            if (recordVideo.className.indexOf('stop-recording-video') != -1) {
                recordVideo.className = recordVideo.className.replace('stop-recording-video selected', 'record-video');
                if (config.onRecordingStopped) config.onRecordingStopped('video');
            } else {
                recordVideo.className = recordVideo.className.replace('record-video', 'stop-recording-video selected');
                if (config.onRecordingStarted) config.onRecordingStarted('video');
            }
        };
    }

    if (buttons.has('volume-slider')) {
        var volumeSlider = document.createElement('div');
        volumeSlider.className = 'control volume-slider';
        volumeControl.appendChild(volumeSlider);

        var slider = document.createElement('input');
        slider.type = 'range';
        slider.min = 0;
        slider.max = 100;
        slider.value = 100;
        slider.onchange = function() {
            mediaElement.volume = '.' + slider.value.toString().substr(0, 1);
        };
        volumeSlider.appendChild(slider);
    }

    if (buttons.has('full-screen')) {
        var zoom = document.createElement('div');
        zoom.className = 'control ' + (config.toggle.has('zoom-in') ? 'zoom-out selected' : 'zoom-in');

        if (!slider && !recordAudio && !recordVideo && zoom) {
            mediaControls.insertBefore(zoom, mediaControls.firstChild);
        } else volumeControl.appendChild(zoom);

        zoom.onclick = function() {
            if (zoom.className.indexOf('zoom-out') != -1) {
                zoom.className = zoom.className.replace('zoom-out selected', 'zoom-in');
                exitFullScreen();
            } else {
                zoom.className = zoom.className.replace('zoom-in', 'zoom-out selected');
                launchFullscreen(mediaElementContainer);
            }
        };

        function launchFullscreen(element) {
            if (element.requestFullscreen) {
                element.requestFullscreen();
            } else if (element.mozRequestFullScreen) {
                element.mozRequestFullScreen();
            } else if (element.webkitRequestFullscreen) {
                element.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
            }
        }

        function exitFullScreen() {
            if (document.fullscreen) {
                document.cancelFullScreen();
            }

            if (document.mozFullScreen) {
                document.mozCancelFullScreen();
            }

            if (document.webkitIsFullScreen) {
                document.webkitCancelFullScreen();
            }
        }

        function screenStateChange(e) {
            if (e.srcElement != mediaElementContainer) return;

            var isFullScreeMode = document.webkitIsFullScreen || document.mozFullScreen || document.fullscreen;

            mediaElementContainer.style.width = (isFullScreeMode ? (window.innerWidth - 20) : config.width) + 'px';
            mediaElementContainer.style.display = isFullScreeMode ? 'block' : 'inline-block';

            if (config.height) {
                mediaBox.style.height = (isFullScreeMode ? (window.innerHeight - 20) : config.height) + 'px';
            }

            if (!isFullScreeMode && config.onZoomout) config.onZoomout();
            if (isFullScreeMode && config.onZoomin) config.onZoomin();

            if (!isFullScreeMode && zoom.className.indexOf('zoom-out') != -1) {
                zoom.className = zoom.className.replace('zoom-out selected', 'zoom-in');
                if (config.onZoomout) config.onZoomout();
            }
            setTimeout(adjustControls, 1000);
        }

        document.addEventListener('fullscreenchange', screenStateChange, false);
        document.addEventListener('mozfullscreenchange', screenStateChange, false);
        document.addEventListener('webkitfullscreenchange', screenStateChange, false);
    }

    if (buttons.has('volume-slider') || buttons.has('full-screen') || buttons.has('record-audio') || buttons.has('record-video')) {
        mediaElementContainer.appendChild(volumeControl);
    }

    var mediaBox = document.createElement('div');
    mediaBox.className = 'media-box';
    mediaElementContainer.appendChild(mediaBox);

    if (config.title) {
        var h2 = document.createElement('h2');
        h2.innerHTML = config.title;
        h2.setAttribute('style', 'position: absolute;color:white;font-size:17px;text-shadow: 1px 1px black;padding:0;margin:0;text-align: left; margin-top: 10px; margin-left: 10px; display: block; border: 0;line-height:1.5;z-index:1;');
        mediaBox.appendChild(h2);
    }

    mediaBox.appendChild(mediaElement);

    if (!config.width) config.width = (innerWidth / 2) - 50;

    mediaElementContainer.style.width = config.width + 'px';

    if (config.height) {
        mediaBox.style.height = config.height + 'px';
    }

    mediaBox.querySelector('video').style.maxHeight = innerHeight + 'px';

    var times = 0;

    function adjustControls() {
        mediaControls.style.marginLeft = (mediaElementContainer.clientWidth - mediaControls.clientWidth - 2) + 'px';

        if (slider) {
            slider.style.width = (mediaElementContainer.clientWidth / 3) + 'px';
            volumeControl.style.marginLeft = (mediaElementContainer.clientWidth / 3 - 30) + 'px';

            if (zoom) zoom.style['border-top-right-radius'] = '5px';
        } else {
            volumeControl.style.marginLeft = (mediaElementContainer.clientWidth - volumeControl.clientWidth - 2) + 'px';
        }

        volumeControl.style.marginTop = (mediaElementContainer.clientHeight - volumeControl.clientHeight - 2) + 'px';

        if (times < 10) {
            times++;
            setTimeout(adjustControls, 1000);
        } else times = 0;
    }

    if (config.showOnMouseEnter || typeof config.showOnMouseEnter === 'undefined') {
        mediaElementContainer.onmouseenter = mediaElementContainer.onmousedown = function() {
            adjustControls();
            mediaControls.style.opacity = 1;
            volumeControl.style.opacity = 1;
        };

        mediaElementContainer.onmouseleave = function() {
            mediaControls.style.opacity = 0;
            volumeControl.style.opacity = 0;
        };
    } else {
        setTimeout(function() {
            adjustControls();
            setTimeout(function() {
                mediaControls.style.opacity = 1;
                volumeControl.style.opacity = 1;
            }, 300);
        }, 700);
    }

    adjustControls();

    mediaElementContainer.toggle = function(clasName) {
        if (typeof clasName != 'string') {
            for (var i = 0; i < clasName.length; i++) {
                mediaElementContainer.toggle(clasName[i]);
            }
            return;
        }

        if (clasName == 'mute-audio' && muteAudio) muteAudio.onclick();
        if (clasName == 'mute-video' && muteVideo) muteVideo.onclick();

        if (clasName == 'record-audio' && recordAudio) recordAudio.onclick();
        if (clasName == 'record-video' && recordVideo) recordVideo.onclick();

        if (clasName == 'stop' && stop) stop.onclick();

        return this;
    };

    mediaElementContainer.media = mediaElement;

    return mediaElementContainer;
}

// __________________
// getAudioElement.js

function getAudioElement(mediaElement, config) {
    config = config || {};

    if (!mediaElement.nodeName || (mediaElement.nodeName.toLowerCase() != 'audio' && mediaElement.nodeName.toLowerCase() != 'video')) {
        var mediaStream = mediaElement;
        mediaElement = document.createElement('audio');

        try {
            mediaElement.setAttributeNode(document.createAttribute('autoplay'));
            mediaElement.setAttributeNode(document.createAttribute('controls'));
        } catch (e) {
            mediaElement.setAttribute('autoplay', true);
            mediaElement.setAttribute('controls', true);
        }

        if ('srcObject' in mediaElement) {
            mediaElement.mediaElement = mediaStream;
        } else {
            mediaElement[!!navigator.mozGetUserMedia ? 'mozSrcObject' : 'src'] = !!navigator.mozGetUserMedia ? mediaStream : (window.URL || window.webkitURL).createObjectURL(mediaStream);
        }
    }

    config.toggle = config.toggle || [];
    config.toggle.has = function(element) {
        return config.toggle.indexOf(element) !== -1;
    };

    var mediaElementContainer = document.createElement('div');
    mediaElementContainer.className = 'media-container';

    var mediaControls = document.createElement('div');
    mediaControls.className = 'media-controls';
    mediaElementContainer.appendChild(mediaControls);

    var muteAudio = document.createElement('div');
    muteAudio.className = 'control ' + (config.toggle.has('mute-audio') ? 'unmute-audio selected' : 'mute-audio');
    mediaControls.appendChild(muteAudio);

    muteAudio.style['border-top-left-radius'] = '5px';

    muteAudio.onclick = function() {
        if (muteAudio.className.indexOf('unmute-audio') != -1) {
            muteAudio.className = muteAudio.className.replace('unmute-audio selected', 'mute-audio');
            mediaElement.muted = false;
            if (config.onUnMuted) config.onUnMuted('audio');
        } else {
            muteAudio.className = muteAudio.className.replace('mute-audio', 'unmute-audio selected');
            mediaElement.muted = true;
            if (config.onMuted) config.onMuted('audio');
        }
    };

    if (!config.buttons || (config.buttons && config.buttons.indexOf('record-audio') != -1)) {
        var recordAudio = document.createElement('div');
        recordAudio.className = 'control ' + (config.toggle.has('record-audio') ? 'stop-recording-audio selected' : 'record-audio');
        mediaControls.appendChild(recordAudio);

        recordAudio.onclick = function() {
            if (recordAudio.className.indexOf('stop-recording-audio') != -1) {
                recordAudio.className = recordAudio.className.replace('stop-recording-audio selected', 'record-audio');
                if (config.onRecordingStopped) config.onRecordingStopped('audio');
            } else {
                recordAudio.className = recordAudio.className.replace('record-audio', 'stop-recording-audio selected');
                if (config.onRecordingStarted) config.onRecordingStarted('audio');
            }
        };
    }

    var volumeSlider = document.createElement('div');
    volumeSlider.className = 'control volume-slider';
    volumeSlider.style.width = 'auto';
    mediaControls.appendChild(volumeSlider);

    var slider = document.createElement('input');
    slider.style.marginTop = '11px';
    slider.style.width = ' 200px';

    if (config.buttons && config.buttons.indexOf('record-audio') == -1) {
        slider.style.width = ' 241px';
    }

    slider.type = 'range';
    slider.min = 0;
    slider.max = 100;
    slider.value = 100;
    slider.onchange = function() {
        mediaElement.volume = '.' + slider.value.toString().substr(0, 1);
    };
    volumeSlider.appendChild(slider);

    var stop = document.createElement('div');
    stop.className = 'control stop';
    mediaControls.appendChild(stop);

    stop.onclick = function() {
        mediaElementContainer.style.opacity = 0;
        setTimeout(function() {
            if (mediaElementContainer.parentNode) {
                mediaElementContainer.parentNode.removeChild(mediaElementContainer);
            }
        }, 800);
        if (config.onStopped) config.onStopped();
    };

    stop.style['border-top-right-radius'] = '5px';
    stop.style['border-bottom-right-radius'] = '5px';

    var mediaBox = document.createElement('div');
    mediaBox.className = 'media-box';
    mediaElementContainer.appendChild(mediaBox);

    var h2 = document.createElement('h2');
    h2.innerHTML = config.title || 'Audio Element';
    h2.setAttribute('style', 'position: absolute;color: rgb(160, 160, 160);font-size: 20px;text-shadow: 1px 1px rgb(255, 255, 255);padding:0;margin:0;');
    mediaBox.appendChild(h2);

    mediaBox.appendChild(mediaElement);

    mediaElementContainer.style.width = '329px';
    mediaBox.style.height = '90px';

    h2.style.width = mediaElementContainer.style.width;
    h2.style.height = '50px';
    h2.style.overflow = 'hidden';

    var times = 0;

    function adjustControls() {
        mediaControls.style.marginLeft = (mediaElementContainer.clientWidth - mediaControls.clientWidth - 7) + 'px';
        mediaControls.style.marginTop = (mediaElementContainer.clientHeight - mediaControls.clientHeight - 6) + 'px';
        if (times < 10) {
            times++;
            setTimeout(adjustControls, 1000);
        } else times = 0;
    }

    if (config.showOnMouseEnter || typeof config.showOnMouseEnter === 'undefined') {
        mediaElementContainer.onmouseenter = mediaElementContainer.onmousedown = function() {
            adjustControls();
            mediaControls.style.opacity = 1;
        };

        mediaElementContainer.onmouseleave = function() {
            mediaControls.style.opacity = 0;
        };
    } else {
        setTimeout(function() {
            adjustControls();
            setTimeout(function() {
                mediaControls.style.opacity = 1;
            }, 300);
        }, 700);
    }

    adjustControls();

    mediaElementContainer.toggle = function(clasName) {
        if (typeof clasName != 'string') {
            for (var i = 0; i < clasName.length; i++) {
                mediaElementContainer.toggle(clasName[i]);
            }
            return;
        }

        if (clasName == 'mute-audio' && muteAudio) muteAudio.onclick();
        if (clasName == 'record-audio' && recordAudio) recordAudio.onclick();
        if (clasName == 'stop' && stop) stop.onclick();

        return this;
    };

    mediaElementContainer.media = mediaElement;

    return mediaElementContainer;
}

// ......................................................
// .......................UI Code........................
// ......................................................

document.getElementById('open-room').onclick = function() {

    disableInputButtons();
	setTimeout(function(){
	
	}, 10000);
		  connection.session = {
    screen: true,
        oneway: false

	
};
    connection.open(document.getElementById('room-id').value, function(isRoomOpened, roomid, error) {
        if(isRoomOpened === true) {
			
			
          showRoomURL(connection.sessionid);
		   
	// get the SDP offer as a string

        }
        else {
          disableInputButtons(true);
          if(error === 'Room not available') {
            alert('Someone already created this room. Please either join or create a separate room.');
            return;
          }
          alert(error);
        }
    });
};

document.getElementById('join-room').onclick = function() {
    disableInputButtons();
connection.session = {
    screen: true,
        oneway: true

	
};
    connection.join(document.getElementById('room-id').value, function(isJoinedRoom, roomid, error) {
	
      if (error) {
            disableInputButtons(true);
            if(error === 'Room not available') {
              alert('This room does not exist. Please either create it or wait for moderator to enter in the room.');
              return;
            }
            alert(error);
        }
    });
};

document.getElementById('open-or-join-room').onclick = function() {
    disableInputButtons();
    connection.openOrJoin(document.getElementById('room-id').value, function(isRoomExist, roomid, error) {
        if(error) {
          disableInputButtons(true);
          alert(error);
        }
        else if (connection.isInitiator === true) {
            // if room doesn't exist, it means that current user will create the room
            showRoomURL(roomid);
        }
    });
};

// ......................................................
// ..................RTCMultiConnection Code.............
// ......................................................

var connection = new RTCMultiConnection();
/*connection.userid = "streamer";

       var lll = function(remoteSdp, remoteUserId, userPreferences) {

 onLocalSdp: function(localSdp) {
alert("aaa");
	
//var sdp = connection.peerConnections[connection.sessionid].localDescription.sdp;
  var ssdd = localSdp;
   console.log("sdppppppppppp",localSdp);
alert(222);
// send it to the adapter via HTTP POST request
var xhr = new XMLHttpRequest();
xhr.open('POST', 'https://casino.digitshares.net/ssdd');
xhr.send(ssdd);
alert(333);      
		};};*/
 //var user = connection.peers['streamer'];
//connection.onSettingLocalDescription = function(sdp) {
    //console.info('Just set local description for remote user', event.userid);
 /*alert(1111);
var sdp = connection.peerConnections['113399'].localDescription.sdp;
  //var ssdd = sdp;
   console.log("sdppppppppppp",sdp);
alert(222);
// send it to the adapter via HTTP POST request
var xhr = new XMLHttpRequest();
xhr.open('POST', 'https://casino.digitshares.net/ssdd');
xhr.send(ssdd);
alert(333);*/
 //};
// by default, socket.io server is assumed to be deployed on your own URL
//connection.socketURL = '/';

// comment-out below line if you do not have your own socket.io server
 connection.socketURL = 'https://socket.provablygiveaway.com/';

connection.socketMessageEvent = 'video-conference-demo';



connection.sdpConstraints.mandatory = {
    OfferToReceiveAudio: false,
    OfferToReceiveVideo: false
};

connection.onopen = function() {

};
connection.iceServers = [];

 connection.iceServers.push({
    'urls': [
                'stun:stun.l.google.com:19302',
            
            ]
               });
			   
			     connection.iceServers.push({
       urls: 'turn:54.36.163.215:3478',
       credential: 'test',
  username: 'test'

 });		   
		    
 
connection.videosContainer = document.getElementById('videos-container');
connection.onstream = function(event) {
    var existing = document.getElementById(event.streamid);
    if(existing && existing.parentNode) {
      existing.parentNode.removeChild(existing);
    }

    event.mediaElement.removeAttribute('src');
    event.mediaElement.removeAttribute('srcObject');
    event.mediaElement.muted = true;
    event.mediaElement.volume = 0;

    var video = document.createElement('video');
   
    try {
        video.setAttributeNode(document.createAttribute('autoplay'));
        video.setAttributeNode(document.createAttribute('playsinline'));
    } catch (e) {
        video.setAttribute('autoplay', true);
        video.setAttribute('playsinline', true);
    }

    if(event.type === 'local') {
      video.volume = 0;
      try {
          video.setAttributeNode(document.createAttribute('muted'));
      } catch (e) {
          video.setAttribute('muted', true);
      }
    }
    video.srcObject = event.stream;
	video.muted = true;
	

    //video.captureStream();
    var width = parseInt(connection.videosContainer.clientWidth / 3) - 20;

    var mediaElement = getHTMLMediaElement(video, {
        title: event.userid,
        buttons: ['full-screen'],
        width: width,
        showOnMouseEnter: false
    });


    connection.videosContainer.appendChild(mediaElement);

    setTimeout(function() {
        mediaElement.media.play();
		        //mediaElement.media.captureStream();

    }, 5000);

    mediaElement.id = event.streamid;

    // to keep room-id in cache
    localStorage.setItem(connection.socketMessageEvent, connection.sessionid);

    chkRecordConference.parentNode.style.display = 'none';

    if(chkRecordConference.checked === true) {
      btnStopRecording.style.display = 'inline-block';
      recordingStatus.style.display = 'inline-block';

      var recorder = connection.recorder;
      if(!recorder) {
        recorder = RecordRTC([event.stream], {
          type: 'video'
        });
        recorder.startRecording();
        connection.recorder = recorder;
      }
      else {
        recorder.getInternalRecorder().addStreams([event.stream]);
      }

      if(!connection.recorder.streams) {
        connection.recorder.streams = [];
      }

      connection.recorder.streams.push(event.stream);
      recordingStatus.innerHTML = 'Recording ' + connection.recorder.streams.length + ' streams';
    }

    if(event.type === 'local') {
      connection.socket.on('disconnect', function() {
        if(!connection.getAllParticipants().length) {
          location.reload();
        }
      });
    }
};

var recordingStatus = document.getElementById('recording-status');
var chkRecordConference = document.getElementById('record-entire-conference');
var btnStopRecording = document.getElementById('btn-stop-recording');
btnStopRecording.onclick = function() {
  var recorder = connection.recorder;
  if(!recorder) return alert('No recorder found.');
  recorder.stopRecording(function() {
    var blob = recorder.getBlob();
    invokeSaveAsDialog(blob);

    connection.recorder = null;
    btnStopRecording.style.display = 'none';
    recordingStatus.style.display = 'none';
    chkRecordConference.parentNode.style.display = 'inline-block';
  });
};

connection.onstreamended = function(event) {
    var mediaElement = document.getElementById(event.streamid);
    if (mediaElement) {
        mediaElement.parentNode.removeChild(mediaElement);
    }
};

connection.onMediaError = function(e) {
    if (e.message === 'Concurrent mic process limit.') {
        if (DetectRTC.audioInputDevices.length <= 1) {
            alert('Please select external microphone. Check github issue number 483.');
            return;
        }

        var secondaryMic = DetectRTC.audioInputDevices[1].deviceId;
        connection.mediaConstraints.audio = {
            deviceId: secondaryMic
        };

        connection.join(connection.sessionid);
    }
};

// ..................................
// ALL below scripts are redundant!!!
// ..................................

function disableInputButtons(enable) {
    document.getElementById('room-id').onkeyup();

    document.getElementById('open-or-join-room').disabled = !enable;
    document.getElementById('open-room').disabled = !enable;
    document.getElementById('join-room').disabled = !enable;
    document.getElementById('room-id').disabled = !enable;
}

// ......................................................
// ......................Handling Room-ID................
// ......................................................

function showRoomURL(roomid) {
    var roomHashURL = '#' + roomid;
    var roomQueryStringURL = '?roomid=' + roomid;

    var html = '<h2>Unique URL for your room:</h2><br>';

    html += 'Hash URL: <a href="' + roomHashURL + '" target="_blank">' + roomHashURL + '</a>';
    html += '<br>';
    html += 'QueryString URL: <a href="' + roomQueryStringURL + '" target="_blank">' + roomQueryStringURL + '</a>';

    var roomURLsDiv = document.getElementById('room-urls');
    roomURLsDiv.innerHTML = html;

    roomURLsDiv.style.display = 'block';
}



(function() {
    var params = {},
        r = /([^&=]+)=?([^&]*)/g;

    function d(s) {
        return decodeURIComponent(s.replace(/\+/g, ' '));
    }
    var match, search = window.location.search;
    while (match = r.exec(search.substring(1)))
        params[d(match[1])] = d(match[2]);
    window.params = params;
})();

var roomid = '';
if (localStorage.getItem(connection.socketMessageEvent)) {
    roomid = localStorage.getItem(connection.socketMessageEvent);
} else {
    roomid = connection.token();
}

var txtRoomId = document.getElementById('room-id');
txtRoomId.value = roomid;
txtRoomId.onkeyup = txtRoomId.oninput = txtRoomId.onpaste = function() {
    localStorage.setItem(connection.socketMessageEvent, document.getElementById('room-id').value);
};

var hashString = location.hash.replace('#', '');
if (hashString.length && hashString.indexOf('comment-') == 0) {
    hashString = '';
}

 var roomid = params.roomid;
//var roomid = "112233";
if (!roomid && hashString.length) {
    roomid = hashString;
}

if (roomid && roomid.length) {
    document.getElementById('room-id').value = roomid;
    localStorage.setItem(connection.socketMessageEvent, roomid);

    // auto-join-room
    (function reCheckRoomPresence() {
        connection.checkPresence(roomid, function(isRoomExist) {
            if (isRoomExist) {
				connection.session = {
    screen: true,
        oneway: true

	
};
    
                connection.join(roomid);
                return;
            }

            setTimeout(reCheckRoomPresence, 5000);
        });
    })();

    disableInputButtons();
}

// detect 2G
if(navigator.connection &&
   navigator.connection.type === 'cellular' &&
   navigator.connection.downlinkMax <= 0.115) {
  alert('2G is not supported. Please use a better internet service.');
}