pas2js/demo/kurento/js/kurento-utils.js

(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.kurentoUtils = 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){
var freeice = require('freeice');
var inherits = require('inherits');
var UAParser = require('ua-parser-js');
var uuidv4 = require('uuid/v4');
var hark = require('hark');
var EventEmitter = require('events').EventEmitter;
var recursive = require('merge').recursive.bind(undefined, true);
var sdpTranslator = require('sdp-translator');
var logger = typeof window === 'undefined' ? console : window.Logger || console;
try {
    require('kurento-browser-extensions');
} catch (error) {
    if (typeof getScreenConstraints === 'undefined') {
        logger.warn('screen sharing is not available');
        getScreenConstraints = function getScreenConstraints(sendSource, callback) {
            callback(new Error('This library is not enabled for screen sharing'));
        };
    }
}
var MEDIA_CONSTRAINTS = {
        audio: true,
        video: {
            width: 640,
            framerate: 15
        }
    };
var ua = typeof window !== 'undefined' && window.navigator ? window.navigator.userAgent : '';
var parser = new UAParser(ua);
var browser = parser.getBrowser();
function insertScriptSrcInHtmlDom(scriptSrc) {
    var script = document.createElement('script');
    script.src = scriptSrc;
    var ref = document.querySelector('script');
    ref.parentNode.insertBefore(script, ref);
}
function importScriptsDependsOnBrowser() {
    if (browser.name === 'IE') {
        insertScriptSrcInHtmlDom('https://cdn.temasys.io/adapterjs/0.15.x/adapter.debug.js');
    }
}
importScriptsDependsOnBrowser();
var usePlanB = false;
if (browser.name === 'Chrome' || browser.name === 'Chromium') {
    logger.debug(browser.name + ': using SDP PlanB');
    usePlanB = true;
}
function noop(error) {
    if (error)
        logger.error(error);
}
function trackStop(track) {
    track.stop && track.stop();
}
function streamStop(stream) {
    stream.getTracks().forEach(trackStop);
}
var dumpSDP = function (description) {
    if (typeof description === 'undefined' || description === null) {
        return '';
    }
    return 'type: ' + description.type + '\r\n' + description.sdp;
};
function bufferizeCandidates(pc, onerror) {
    var candidatesQueue = [];
    function setSignalingstatechangeAccordingWwebBrowser(functionToExecute, pc) {
        if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
            pc.onsignalingstatechange = functionToExecute;
        } else {
            pc.addEventListener('signalingstatechange', functionToExecute);
        }
    }
    var signalingstatechangeFunction = function () {
        if (pc.signalingState === 'stable') {
            while (candidatesQueue.length) {
                var entry = candidatesQueue.shift();
                pc.addIceCandidate(entry.candidate, entry.callback, entry.callback);
            }
        }
    };
    setSignalingstatechangeAccordingWwebBrowser(signalingstatechangeFunction, pc);
    return function (candidate, callback) {
        callback = callback || onerror;
        switch (pc.signalingState) {
        case 'closed':
            callback(new Error('PeerConnection object is closed'));
            break;
        case 'stable':
            if (pc.remoteDescription) {
                pc.addIceCandidate(candidate, callback, callback);
                break;
            }
        default:
            candidatesQueue.push({
                candidate: candidate,
                callback: callback
            });
        }
    };
}
function removeFIDFromOffer(sdp) {
    var n = sdp.indexOf('a=ssrc-group:FID');
    if (n > 0) {
        return sdp.slice(0, n);
    } else {
        return sdp;
    }
}
function getSimulcastInfo(videoStream) {
    var videoTracks = videoStream.getVideoTracks();
    if (!videoTracks.length) {
        logger.warn('No video tracks available in the video stream');
        return '';
    }
    var lines = [
            'a=x-google-flag:conference',
            'a=ssrc-group:SIM 1 2 3',
            'a=ssrc:1 cname:localVideo',
            'a=ssrc:1 msid:' + videoStream.id + ' ' + videoTracks[0].id,
            'a=ssrc:1 mslabel:' + videoStream.id,
            'a=ssrc:1 label:' + videoTracks[0].id,
            'a=ssrc:2 cname:localVideo',
            'a=ssrc:2 msid:' + videoStream.id + ' ' + videoTracks[0].id,
            'a=ssrc:2 mslabel:' + videoStream.id,
            'a=ssrc:2 label:' + videoTracks[0].id,
            'a=ssrc:3 cname:localVideo',
            'a=ssrc:3 msid:' + videoStream.id + ' ' + videoTracks[0].id,
            'a=ssrc:3 mslabel:' + videoStream.id,
            'a=ssrc:3 label:' + videoTracks[0].id
        ];
    lines.push('');
    return lines.join('\n');
}
function sleep(milliseconds) {
    var start = new Date().getTime();
    for (var i = 0; i < 10000000; i++) {
        if (new Date().getTime() - start > milliseconds) {
            break;
        }
    }
}
function setIceCandidateAccordingWebBrowser(functionToExecute, pc) {
    if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
        pc.onicecandidate = functionToExecute;
    } else {
        pc.addEventListener('icecandidate', functionToExecute);
    }
}
function WebRtcPeer(mode, options, callback) {
    if (!(this instanceof WebRtcPeer)) {
        return new WebRtcPeer(mode, options, callback);
    }
    WebRtcPeer.super_.call(this);
    if (options instanceof Function) {
        callback = options;
        options = undefined;
    }
    options = options || {};
    callback = (callback || noop).bind(this);
    var self = this;
    var localVideo = options.localVideo;
    var remoteVideo = options.remoteVideo;
    var videoStream = options.videoStream;
    var audioStream = options.audioStream;
    var mediaConstraints = options.mediaConstraints;
    var pc = options.peerConnection;
    var sendSource = options.sendSource || 'webcam';
    var dataChannelConfig = options.dataChannelConfig;
    var useDataChannels = options.dataChannels || false;
    var dataChannel;
    var guid = uuidv4();
    var configuration = recursive({ iceServers: freeice() }, options.configuration);
    var onicecandidate = options.onicecandidate;
    if (onicecandidate)
        this.on('icecandidate', onicecandidate);
    var oncandidategatheringdone = options.oncandidategatheringdone;
    if (oncandidategatheringdone) {
        this.on('candidategatheringdone', oncandidategatheringdone);
    }
    var simulcast = options.simulcast;
    var multistream = options.multistream;
    var interop = new sdpTranslator.Interop();
    var candidatesQueueOut = [];
    var candidategatheringdone = false;
    Object.defineProperties(this, {
        'peerConnection': {
            get: function () {
                return pc;
            }
        },
        'id': {
            value: options.id || guid,
            writable: false
        },
        'remoteVideo': {
            get: function () {
                return remoteVideo;
            }
        },
        'localVideo': {
            get: function () {
                return localVideo;
            }
        },
        'dataChannel': {
            get: function () {
                return dataChannel;
            }
        },
        'currentFrame': {
            get: function () {
                if (!remoteVideo)
                    return;
                if (remoteVideo.readyState < remoteVideo.HAVE_CURRENT_DATA)
                    throw new Error('No video stream data available');
                var canvas = document.createElement('canvas');
                canvas.width = remoteVideo.videoWidth;
                canvas.height = remoteVideo.videoHeight;
                canvas.getContext('2d').drawImage(remoteVideo, 0, 0);
                return canvas;
            }
        }
    });
    if (!pc) {
        pc = new RTCPeerConnection(configuration);
        if (useDataChannels && !dataChannel) {
            var dcId = 'WebRtcPeer-' + self.id;
            var dcOptions = undefined;
            if (dataChannelConfig) {
                dcId = dataChannelConfig.id || dcId;
                dcOptions = dataChannelConfig.options;
            }
            dataChannel = pc.createDataChannel(dcId, dcOptions);
            if (dataChannelConfig) {
                dataChannel.onopen = dataChannelConfig.onopen;
                dataChannel.onclose = dataChannelConfig.onclose;
                dataChannel.onmessage = dataChannelConfig.onmessage;
                dataChannel.onbufferedamountlow = dataChannelConfig.onbufferedamountlow;
                dataChannel.onerror = dataChannelConfig.onerror || noop;
            }
        }
    }
    if (!pc.getLocalStreams && pc.getSenders) {
        pc.getLocalStreams = function () {
            var stream = new MediaStream();
            pc.getSenders().forEach(function (sender) {
                stream.addTrack(sender.track);
            });
            return [stream];
        };
    }
    if (!pc.getRemoteStreams && pc.getReceivers) {
        pc.getRemoteStreams = function () {
            var stream = new MediaStream();
            pc.getReceivers().forEach(function (sender) {
                stream.addTrack(sender.track);
            });
            return [stream];
        };
    }
    var iceCandidateFunction = function (event) {
        var candidate = event.candidate;
        if (EventEmitter.listenerCount(self, 'icecandidate') || EventEmitter.listenerCount(self, 'candidategatheringdone')) {
            if (candidate) {
                var cand;
                if (multistream && usePlanB) {
                    cand = interop.candidateToUnifiedPlan(candidate);
                } else {
                    cand = candidate;
                }
                if (typeof AdapterJS === 'undefined') {
                    self.emit('icecandidate', cand);
                }
                candidategatheringdone = false;
            } else if (!candidategatheringdone) {
                if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
                    EventEmitter.prototype.emit('candidategatheringdone', cand);
                } else {
                    self.emit('candidategatheringdone');
                }
                candidategatheringdone = true;
            }
        } else if (!candidategatheringdone) {
            candidatesQueueOut.push(candidate);
            if (!candidate)
                candidategatheringdone = true;
        }
    };
    setIceCandidateAccordingWebBrowser(iceCandidateFunction, pc);
    pc.onaddstream = options.onaddstream;
    pc.onnegotiationneeded = options.onnegotiationneeded;
    this.on('newListener', function (event, listener) {
        if (event === 'icecandidate' || event === 'candidategatheringdone') {
            while (candidatesQueueOut.length) {
                var candidate = candidatesQueueOut.shift();
                if (!candidate === (event === 'candidategatheringdone')) {
                    listener(candidate);
                }
            }
        }
    });
    var addIceCandidate = bufferizeCandidates(pc);
    this.addIceCandidate = function (iceCandidate, callback) {
        var candidate;
        if (multistream && usePlanB) {
            candidate = interop.candidateToPlanB(iceCandidate);
        } else {
            candidate = new RTCIceCandidate(iceCandidate);
        }
        logger.debug('Remote ICE candidate received', iceCandidate);
        callback = (callback || noop).bind(this);
        addIceCandidate(candidate, callback);
    };
    this.generateOffer = function (callback) {
        callback = callback.bind(this);
        if (mode === 'recvonly') {
            var useAudio = mediaConstraints && typeof mediaConstraints.audio === 'boolean' ? mediaConstraints.audio : true;
            var useVideo = mediaConstraints && typeof mediaConstraints.video === 'boolean' ? mediaConstraints.video : true;
            if (useAudio) {
                pc.addTransceiver('audio', { direction: 'recvonly' });
            }
            if (useVideo) {
                pc.addTransceiver('video', { direction: 'recvonly' });
            }
        }
        if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
            var setLocalDescriptionOnSuccess = function () {
                sleep(1000);
                var localDescription = pc.localDescription;
                logger.debug('Local description set\n', localDescription.sdp);
                if (multistream && usePlanB) {
                    localDescription = interop.toUnifiedPlan(localDescription);
                    logger.debug('offer::origPlanB->UnifiedPlan', dumpSDP(localDescription));
                }
                callback(null, localDescription.sdp, self.processAnswer.bind(self));
            };
            var createOfferOnSuccess = function (offer) {
                logger.debug('Created SDP offer');
                logger.debug('Local description set\n', pc.localDescription);
                pc.setLocalDescription(offer, setLocalDescriptionOnSuccess, callback);
            };
            pc.createOffer(createOfferOnSuccess, callback);
        } else {
            pc.createOffer().then(function (offer) {
                logger.debug('Created SDP offer');
                offer = mangleSdpToAddSimulcast(offer);
                return pc.setLocalDescription(offer);
            }).then(function () {
                var localDescription = pc.localDescription;
                logger.debug('Local description set\n', localDescription.sdp);
                if (multistream && usePlanB) {
                    localDescription = interop.toUnifiedPlan(localDescription);
                    logger.debug('offer::origPlanB->UnifiedPlan', dumpSDP(localDescription));
                }
                callback(null, localDescription.sdp, self.processAnswer.bind(self));
            }).catch(callback);
        }
    };
    this.getLocalSessionDescriptor = function () {
        return pc.localDescription;
    };
    this.getRemoteSessionDescriptor = function () {
        return pc.remoteDescription;
    };
    function setRemoteVideo() {
        if (remoteVideo) {
            remoteVideo.pause();
            var stream = pc.getRemoteStreams()[0];
            remoteVideo.srcObject = stream;
            logger.debug('Remote stream:', stream);
            if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
                remoteVideo = attachMediaStream(remoteVideo, stream);
            } else {
                remoteVideo.load();
            }
        }
    }
    this.showLocalVideo = function () {
        localVideo.srcObject = videoStream;
        localVideo.muted = true;
        if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
            localVideo = attachMediaStream(localVideo, videoStream);
        }
    };
    this.send = function (data) {
        if (dataChannel && dataChannel.readyState === 'open') {
            dataChannel.send(data);
        } else {
            logger.warn('Trying to send data over a non-existing or closed data channel');
        }
    };
    this.processAnswer = function (sdpAnswer, callback) {
        callback = (callback || noop).bind(this);
        var answer = new RTCSessionDescription({
                type: 'answer',
                sdp: sdpAnswer
            });
        if (multistream && usePlanB) {
            var planBAnswer = interop.toPlanB(answer);
            logger.debug('asnwer::planB', dumpSDP(planBAnswer));
            answer = planBAnswer;
        }
        logger.debug('SDP answer received, setting remote description');
        if (pc.signalingState === 'closed') {
            return callback('PeerConnection is closed');
        }
        pc.setRemoteDescription(answer).then(function () {
            setRemoteVideo();
            callback();
        }, callback);
    };
    this.processOffer = function (sdpOffer, callback) {
        callback = callback.bind(this);
        var offer = new RTCSessionDescription({
                type: 'offer',
                sdp: sdpOffer
            });
        if (multistream && usePlanB) {
            var planBOffer = interop.toPlanB(offer);
            logger.debug('offer::planB', dumpSDP(planBOffer));
            offer = planBOffer;
        }
        logger.debug('SDP offer received, setting remote description');
        if (pc.signalingState === 'closed') {
            return callback('PeerConnection is closed');
        }
        pc.setRemoteDescription(offer).then(function () {
            return setRemoteVideo();
        }).then(function () {
            return pc.createAnswer();
        }).then(function (answer) {
            answer = mangleSdpToAddSimulcast(answer);
            logger.debug('Created SDP answer');
            return pc.setLocalDescription(answer);
        }).then(function () {
            var localDescription = pc.localDescription;
            if (multistream && usePlanB) {
                localDescription = interop.toUnifiedPlan(localDescription);
                logger.debug('answer::origPlanB->UnifiedPlan', dumpSDP(localDescription));
            }
            logger.debug('Local description set\n', localDescription.sdp);
            callback(null, localDescription.sdp);
        }).catch(callback);
    };
    function mangleSdpToAddSimulcast(answer) {
        if (simulcast) {
            if (browser.name === 'Chrome' || browser.name === 'Chromium') {
                logger.debug('Adding multicast info');
                answer = new RTCSessionDescription({
                    'type': answer.type,
                    'sdp': removeFIDFromOffer(answer.sdp) + getSimulcastInfo(videoStream)
                });
            } else {
                logger.warn('Simulcast is only available in Chrome browser.');
            }
        }
        return answer;
    }
    function start() {
        if (pc.signalingState === 'closed') {
            callback('The peer connection object is in "closed" state. This is most likely due to an invocation of the dispose method before accepting in the dialogue');
        }
        if (videoStream && localVideo) {
            self.showLocalVideo();
        }
        if (videoStream) {
            videoStream.getTracks().forEach(function (track) {
                pc.addTrack(track, videoStream);
            });
        }
        if (audioStream) {
            audioStream.getTracks().forEach(function (track) {
                pc.addTrack(track, audioStream);
            });
        }
        var browser = parser.getBrowser();
        if (mode === 'sendonly' && (browser.name === 'Chrome' || browser.name === 'Chromium') && browser.major === 39) {
            mode = 'sendrecv';
        }
        callback();
    }
    if (mode !== 'recvonly' && !videoStream && !audioStream) {
        function getMedia(constraints) {
            if (constraints === undefined) {
                constraints = MEDIA_CONSTRAINTS;
            }
            if (typeof AdapterJS !== 'undefined' && AdapterJS.webrtcDetectedBrowser === 'IE' && AdapterJS.webrtcDetectedVersion >= 9) {
                navigator.getUserMedia(constraints, function (stream) {
                    videoStream = stream;
                    start();
                }, callback);
            } else {
                navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
                    videoStream = stream;
                    start();
                }).catch(callback);
            }
        }
        if (sendSource === 'webcam') {
            getMedia(mediaConstraints);
        } else {
            getScreenConstraints(sendSource, function (error, constraints_) {
                if (error)
                    return callback(error);
                constraints = [mediaConstraints];
                constraints.unshift(constraints_);
                getMedia(recursive.apply(undefined, constraints));
            }, guid);
        }
    } else {
        setTimeout(start, 0);
    }
    this.on('_dispose', function () {
        if (localVideo) {
            localVideo.pause();
            localVideo.srcObject = null;
            if (typeof AdapterJS === 'undefined') {
                localVideo.load();
            }
            localVideo.muted = false;
        }
        if (remoteVideo) {
            remoteVideo.pause();
            remoteVideo.srcObject = null;
            if (typeof AdapterJS === 'undefined') {
                remoteVideo.load();
            }
        }
        self.removeAllListeners();
        if (typeof window !== 'undefined' && window.cancelChooseDesktopMedia !== undefined) {
            window.cancelChooseDesktopMedia(guid);
        }
    });
}
inherits(WebRtcPeer, EventEmitter);
function createEnableDescriptor(type) {
    var method = 'get' + type + 'Tracks';
    return {
        enumerable: true,
        get: function () {
            if (!this.peerConnection)
                return;
            var streams = this.peerConnection.getLocalStreams();
            if (!streams.length)
                return;
            for (var i = 0, stream; stream = streams[i]; i++) {
                var tracks = stream[method]();
                for (var j = 0, track; track = tracks[j]; j++)
                    if (!track.enabled)
                        return false;
            }
            return true;
        },
        set: function (value) {
            function trackSetEnable(track) {
                track.enabled = value;
            }
            this.peerConnection.getLocalStreams().forEach(function (stream) {
                stream[method]().forEach(trackSetEnable);
            });
        }
    };
}
Object.defineProperties(WebRtcPeer.prototype, {
    'enabled': {
        enumerable: true,
        get: function () {
            return this.audioEnabled && this.videoEnabled;
        },
        set: function (value) {
            this.audioEnabled = this.videoEnabled = value;
        }
    },
    'audioEnabled': createEnableDescriptor('Audio'),
    'videoEnabled': createEnableDescriptor('Video')
});
WebRtcPeer.prototype.getLocalStream = function (index) {
    if (this.peerConnection) {
        return this.peerConnection.getLocalStreams()[index || 0];
    }
};
WebRtcPeer.prototype.getRemoteStream = function (index) {
    if (this.peerConnection) {
        return this.peerConnection.getRemoteStreams()[index || 0];
    }
};
WebRtcPeer.prototype.dispose = function () {
    logger.debug('Disposing WebRtcPeer');
    var pc = this.peerConnection;
    var dc = this.dataChannel;
    try {
        if (dc) {
            if (dc.readyState === 'closed')
                return;
            dc.close();
        }
        if (pc) {
            if (pc.signalingState === 'closed')
                return;
            pc.getLocalStreams().forEach(streamStop);
            pc.close();
        }
    } catch (err) {
        logger.warn('Exception disposing webrtc peer ' + err);
    }
    if (typeof AdapterJS === 'undefined') {
        this.emit('_dispose');
    }
};
function WebRtcPeerRecvonly(options, callback) {
    if (!(this instanceof WebRtcPeerRecvonly)) {
        return new WebRtcPeerRecvonly(options, callback);
    }
    WebRtcPeerRecvonly.super_.call(this, 'recvonly', options, callback);
}
inherits(WebRtcPeerRecvonly, WebRtcPeer);
function WebRtcPeerSendonly(options, callback) {
    if (!(this instanceof WebRtcPeerSendonly)) {
        return new WebRtcPeerSendonly(options, callback);
    }
    WebRtcPeerSendonly.super_.call(this, 'sendonly', options, callback);
}
inherits(WebRtcPeerSendonly, WebRtcPeer);
function WebRtcPeerSendrecv(options, callback) {
    if (!(this instanceof WebRtcPeerSendrecv)) {
        return new WebRtcPeerSendrecv(options, callback);
    }
    WebRtcPeerSendrecv.super_.call(this, 'sendrecv', options, callback);
}
inherits(WebRtcPeerSendrecv, WebRtcPeer);
function harkUtils(stream, options) {
    return hark(stream, options);
}
exports.bufferizeCandidates = bufferizeCandidates;
exports.WebRtcPeerRecvonly = WebRtcPeerRecvonly;
exports.WebRtcPeerSendonly = WebRtcPeerSendonly;
exports.WebRtcPeerSendrecv = WebRtcPeerSendrecv;
exports.hark = harkUtils;
},{"events":4,"freeice":5,"hark":8,"inherits":9,"kurento-browser-extensions":10,"merge":11,"sdp-translator":18,"ua-parser-js":21,"uuid/v4":24}],2:[function(require,module,exports){
if (window.addEventListener)
    module.exports = require('./index');
},{"./index":3}],3:[function(require,module,exports){
var WebRtcPeer = require('./WebRtcPeer');
exports.WebRtcPeer = WebRtcPeer;
},{"./WebRtcPeer":1}],4:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var objectCreate = Object.create || objectCreatePolyfill
var objectKeys = Object.keys || objectKeysPolyfill
var bind = Function.prototype.bind || functionBindPolyfill

function EventEmitter() {
  if (!this._events || !Object.prototype.hasOwnProperty.call(this, '_events')) {
    this._events = objectCreate(null);
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;

var hasDefineProperty;
try {
  var o = {};
  if (Object.defineProperty) Object.defineProperty(o, 'x', { value: 0 });
  hasDefineProperty = o.x === 0;
} catch (err) { hasDefineProperty = false }
if (hasDefineProperty) {
  Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
    enumerable: true,
    get: function() {
      return defaultMaxListeners;
    },
    set: function(arg) {
      // check whether the input is a positive number (whose value is zero or
      // greater and not a NaN).
      if (typeof arg !== 'number' || arg < 0 || arg !== arg)
        throw new TypeError('"defaultMaxListeners" must be a positive number');
      defaultMaxListeners = arg;
    }
  });
} else {
  EventEmitter.defaultMaxListeners = defaultMaxListeners;
}

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || isNaN(n))
    throw new TypeError('"n" argument must be a positive number');
  this._maxListeners = n;
  return this;
};

function $getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return $getMaxListeners(this);
};

// These standalone emit* functions are used to optimize calling of event
// handlers for fast cases because emit() itself often has a variable number of
// arguments and can be deoptimized because of that. These functions always have
// the same number of arguments and thus do not get deoptimized, so the code
// inside them can execute faster.
function emitNone(handler, isFn, self) {
  if (isFn)
    handler.call(self);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self);
  }
}
function emitOne(handler, isFn, self, arg1) {
  if (isFn)
    handler.call(self, arg1);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1);
  }
}
function emitTwo(handler, isFn, self, arg1, arg2) {
  if (isFn)
    handler.call(self, arg1, arg2);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2);
  }
}
function emitThree(handler, isFn, self, arg1, arg2, arg3) {
  if (isFn)
    handler.call(self, arg1, arg2, arg3);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].call(self, arg1, arg2, arg3);
  }
}

function emitMany(handler, isFn, self, args) {
  if (isFn)
    handler.apply(self, args);
  else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      listeners[i].apply(self, args);
  }
}

EventEmitter.prototype.emit = function emit(type) {
  var er, handler, len, args, i, events;
  var doError = (type === 'error');

  events = this._events;
  if (events)
    doError = (doError && events.error == null);
  else if (!doError)
    return false;

  // If there is no 'error' event listener then throw.
  if (doError) {
    if (arguments.length > 1)
      er = arguments[1];
    if (er instanceof Error) {
      throw er; // Unhandled 'error' event
    } else {
      // At least give some kind of context to the user
      var err = new Error('Unhandled "error" event. (' + er + ')');
      err.context = er;
      throw err;
    }
    return false;
  }

  handler = events[type];

  if (!handler)
    return false;

  var isFn = typeof handler === 'function';
  len = arguments.length;
  switch (len) {
      // fast cases
    case 1:
      emitNone(handler, isFn, this);
      break;
    case 2:
      emitOne(handler, isFn, this, arguments[1]);
      break;
    case 3:
      emitTwo(handler, isFn, this, arguments[1], arguments[2]);
      break;
    case 4:
      emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
      break;
      // slower
    default:
      args = new Array(len - 1);
      for (i = 1; i < len; i++)
        args[i - 1] = arguments[i];
      emitMany(handler, isFn, this, args);
  }

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');

  events = target._events;
  if (!events) {
    events = target._events = objectCreate(null);
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener) {
      target.emit('newListener', type,
          listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (!existing) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] =
          prepend ? [listener, existing] : [existing, listener];
    } else {
      // If we've already got an array, just append.
      if (prepend) {
        existing.unshift(listener);
      } else {
        existing.push(listener);
      }
    }

    // Check for listener leak
    if (!existing.warned) {
      m = $getMaxListeners(target);
      if (m && m > 0 && existing.length > m) {
        existing.warned = true;
        var w = new Error('Possible EventEmitter memory leak detected. ' +
            existing.length + ' "' + String(type) + '" listeners ' +
            'added. Use emitter.setMaxListeners() to ' +
            'increase limit.');
        w.name = 'MaxListenersExceededWarning';
        w.emitter = target;
        w.type = type;
        w.count = existing.length;
        if (typeof console === 'object' && console.warn) {
          console.warn('%s: %s', w.name, w.message);
        }
      }
    }
  }

  return target;
}

EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function onceWrapper() {
  if (!this.fired) {
    this.target.removeListener(this.type, this.wrapFn);
    this.fired = true;
    switch (arguments.length) {
      case 0:
        return this.listener.call(this.target);
      case 1:
        return this.listener.call(this.target, arguments[0]);
      case 2:
        return this.listener.call(this.target, arguments[0], arguments[1]);
      case 3:
        return this.listener.call(this.target, arguments[0], arguments[1],
            arguments[2]);
      default:
        var args = new Array(arguments.length);
        for (var i = 0; i < args.length; ++i)
          args[i] = arguments[i];
        this.listener.apply(this.target, args);
    }
  }
}

function _onceWrap(target, type, listener) {
  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
  var wrapped = bind.call(onceWrapper, state);
  wrapped.listener = listener;
  state.wrapFn = wrapped;
  return wrapped;
}

EventEmitter.prototype.once = function once(type, listener) {
  if (typeof listener !== 'function')
    throw new TypeError('"listener" argument must be a function');
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      if (typeof listener !== 'function')
        throw new TypeError('"listener" argument must be a function');

      events = this._events;
      if (!events)
        return this;

      list = events[type];
      if (!list)
        return this;

      if (list === listener || list.listener === listener) {
        if (--this._eventsCount === 0)
          this._events = objectCreate(null);
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length - 1; i >= 0; i--) {
          if (list[i] === listener || list[i].listener === listener) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (position === 0)
          list.shift();
        else
          spliceOne(list, position);

        if (list.length === 1)
          events[type] = list[0];

        if (events.removeListener)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events, i;

      events = this._events;
      if (!events)
        return this;

      // not listening for removeListener, no need to emit
      if (!events.removeListener) {
        if (arguments.length === 0) {
          this._events = objectCreate(null);
          this._eventsCount = 0;
        } else if (events[type]) {
          if (--this._eventsCount === 0)
            this._events = objectCreate(null);
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = objectKeys(events);
        var key;
        for (i = 0; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = objectCreate(null);
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners) {
        // LIFO order
        for (i = listeners.length - 1; i >= 0; i--) {
          this.removeListener(type, listeners[i]);
        }
      }

      return this;
    };

function _listeners(target, type, unwrap) {
  var events = target._events;

  if (!events)
    return [];

  var evlistener = events[type];
  if (!evlistener)
    return [];

  if (typeof evlistener === 'function')
    return unwrap ? [evlistener.listener || evlistener] : [evlistener];

  return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}

EventEmitter.prototype.listeners = function listeners(type) {
  return _listeners(this, type, true);
};

EventEmitter.prototype.rawListeners = function rawListeners(type) {
  return _listeners(this, type, false);
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
};

// About 1.5x faster than the two-arg version of Array#splice().
function spliceOne(list, index) {
  for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
    list[i] = list[k];
  list.pop();
}

function arrayClone(arr, n) {
  var copy = new Array(n);
  for (var i = 0; i < n; ++i)
    copy[i] = arr[i];
  return copy;
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}

function objectCreatePolyfill(proto) {
  var F = function() {};
  F.prototype = proto;
  return new F;
}
function objectKeysPolyfill(obj) {
  var keys = [];
  for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k)) {
    keys.push(k);
  }
  return k;
}
function functionBindPolyfill(context) {
  var fn = this;
  return function () {
    return fn.apply(context, arguments);
  };
}

},{}],5:[function(require,module,exports){
/* jshint node: true */
'use strict';

var normalice = require('normalice');

/**
  # freeice

  The `freeice` module is a simple way of getting random STUN or TURN server
  for your WebRTC application.  The list of servers (just STUN at this stage)
  were sourced from this [gist](https://gist.github.com/zziuni/3741933).

  ## Example Use

  The following demonstrates how you can use `freeice` with
  [rtc-quickconnect](https://github.com/rtc-io/rtc-quickconnect):

  <<< examples/quickconnect.js

  As the `freeice` module generates ice servers in a list compliant with the
  WebRTC spec you will be able to use it with raw `RTCPeerConnection`
  constructors and other WebRTC libraries.

  ## Hey, don't use my STUN/TURN server!

  If for some reason your free STUN or TURN server ends up in the
  list of servers ([stun](https://github.com/DamonOehlman/freeice/blob/master/stun.json) or
  [turn](https://github.com/DamonOehlman/freeice/blob/master/turn.json))
  that is used in this module, you can feel
  free to open an issue on this repository and those servers will be removed
  within 24 hours (or sooner).  This is the quickest and probably the most
  polite way to have something removed (and provides us some visibility
  if someone opens a pull request requesting that a server is added).

  ## Please add my server!

  If you have a server that you wish to add to the list, that's awesome! I'm
  sure I speak on behalf of a whole pile of WebRTC developers who say thanks.
  To get it into the list, feel free to either open a pull request or if you
  find that process a bit daunting then just create an issue requesting
  the addition of the server (make sure you provide all the details, and if
  you have a Terms of Service then including that in the PR/issue would be
  awesome).

  ## I know of a free server, can I add it?

  Sure, if you do your homework and make sure it is ok to use (I'm currently
  in the process of reviewing the terms of those STUN servers included from
  the original list).  If it's ok to go, then please see the previous entry
  for how to add it.

  ## Current List of Servers

  * current as at the time of last `README.md` file generation

  ### STUN

  <<< stun.json

  ### TURN

  <<< turn.json

**/

var freeice = function(opts) {
  // if a list of servers has been provided, then use it instead of defaults
  var servers = {
    stun: (opts || {}).stun || require('./stun.json'),
    turn: (opts || {}).turn || require('./turn.json')
  };

  var stunCount = (opts || {}).stunCount || 2;
  var turnCount = (opts || {}).turnCount || 0;
  var selected;

  function getServers(type, count) {
    var out = [];
    var input = [].concat(servers[type]);
    var idx;

    while (input.length && out.length < count) {
      idx = (Math.random() * input.length) | 0;
      out = out.concat(input.splice(idx, 1));
    }

    return out.map(function(url) {
        //If it's a not a string, don't try to "normalice" it otherwise using type:url will screw it up
        if ((typeof url !== 'string') && (! (url instanceof String))) {
            return url;
        } else {
            return normalice(type + ':' + url);
        }
    });
  }

  // add stun servers
  selected = [].concat(getServers('stun', stunCount));

  if (turnCount) {
    selected = selected.concat(getServers('turn', turnCount));
  }

  return selected;
};

module.exports = freeice;
},{"./stun.json":6,"./turn.json":7,"normalice":12}],6:[function(require,module,exports){
module.exports=[
  "stun.l.google.com:19302",
  "stun1.l.google.com:19302",
  "stun2.l.google.com:19302",
  "stun3.l.google.com:19302",
  "stun4.l.google.com:19302",
  "stun.ekiga.net",
  "stun.ideasip.com",
  "stun.schlund.de",
  "stun.stunprotocol.org:3478",
  "stun.voiparound.com",
  "stun.voipbuster.com",
  "stun.voipstunt.com",
  "stun.voxgratia.org"
]

},{}],7:[function(require,module,exports){
module.exports=[]

},{}],8:[function(require,module,exports){
var WildEmitter = require('wildemitter');

function getMaxVolume (analyser, fftBins) {
  var maxVolume = -Infinity;
  analyser.getFloatFrequencyData(fftBins);

  for(var i=4, ii=fftBins.length; i < ii; i++) {
    if (fftBins[i] > maxVolume && fftBins[i] < 0) {
      maxVolume = fftBins[i];
    }
  };

  return maxVolume;
}


var audioContextType;
if (typeof window !== 'undefined') {
  audioContextType = window.AudioContext || window.webkitAudioContext;
}
// use a single audio context due to hardware limits
var audioContext = null;
module.exports = function(stream, options) {
  var harker = new WildEmitter();

  // make it not break in non-supported browsers
  if (!audioContextType) return harker;

  //Config
  var options = options || {},
      smoothing = (options.smoothing || 0.1),
      interval = (options.interval || 50),
      threshold = options.threshold,
      play = options.play,
      history = options.history || 10,
      running = true;

  // Ensure that just a single AudioContext is internally created
  audioContext = options.audioContext || audioContext || new audioContextType();

  var sourceNode, fftBins, analyser;

  analyser = audioContext.createAnalyser();
  analyser.fftSize = 512;
  analyser.smoothingTimeConstant = smoothing;
  fftBins = new Float32Array(analyser.frequencyBinCount);

  if (stream.jquery) stream = stream[0];
  if (stream instanceof HTMLAudioElement || stream instanceof HTMLVideoElement) {
    //Audio Tag
    sourceNode = audioContext.createMediaElementSource(stream);
    if (typeof play === 'undefined') play = true;
    threshold = threshold || -50;
  } else {
    //WebRTC Stream
    sourceNode = audioContext.createMediaStreamSource(stream);
    threshold = threshold || -50;
  }

  sourceNode.connect(analyser);
  if (play) analyser.connect(audioContext.destination);

  harker.speaking = false;

  harker.suspend = function() {
    return audioContext.suspend();
  }
  harker.resume = function() {
    return audioContext.resume();
  }
  Object.defineProperty(harker, 'state', { get: function() {
    return audioContext.state;
  }});
  audioContext.onstatechange = function() {
    harker.emit('state_change', audioContext.state);
  }

  harker.setThreshold = function(t) {
    threshold = t;
  };

  harker.setInterval = function(i) {
    interval = i;
  };

  harker.stop = function() {
    running = false;
    harker.emit('volume_change', -100, threshold);
    if (harker.speaking) {
      harker.speaking = false;
      harker.emit('stopped_speaking');
    }
    analyser.disconnect();
    sourceNode.disconnect();
  };
  harker.speakingHistory = [];
  for (var i = 0; i < history; i++) {
      harker.speakingHistory.push(0);
  }

  // Poll the analyser node to determine if speaking
  // and emit events if changed
  var looper = function() {
    setTimeout(function() {

      //check if stop has been called
      if(!running) {
        return;
      }

      var currentVolume = getMaxVolume(analyser, fftBins);

      harker.emit('volume_change', currentVolume, threshold);

      var history = 0;
      if (currentVolume > threshold && !harker.speaking) {
        // trigger quickly, short history
        for (var i = harker.speakingHistory.length - 3; i < harker.speakingHistory.length; i++) {
          history += harker.speakingHistory[i];
        }
        if (history >= 2) {
          harker.speaking = true;
          harker.emit('speaking');
        }
      } else if (currentVolume < threshold && harker.speaking) {
        for (var i = 0; i < harker.speakingHistory.length; i++) {
          history += harker.speakingHistory[i];
        }
        if (history == 0) {
          harker.speaking = false;
          harker.emit('stopped_speaking');
        }
      }
      harker.speakingHistory.shift();
      harker.speakingHistory.push(0 + (currentVolume > threshold));

      looper();
    }, interval);
  };
  looper();

  return harker;
}

},{"wildemitter":25}],9:[function(require,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      })
    }
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor
      var TempCtor = function () {}
      TempCtor.prototype = superCtor.prototype
      ctor.prototype = new TempCtor()
      ctor.prototype.constructor = ctor
    }
  }
}

},{}],10:[function(require,module,exports){
// Does nothing at all.

},{}],11:[function(require,module,exports){
/*!
 * @name JavaScript/NodeJS Merge v1.2.1
 * @author yeikos
 * @repository https://github.com/yeikos/js.merge

 * Copyright 2014 yeikos - MIT license
 * https://raw.github.com/yeikos/js.merge/master/LICENSE
 */

;(function(isNode) {

	/**
	 * Merge one or more objects 
	 * @param bool? clone
	 * @param mixed,... arguments
	 * @return object
	 */

	var Public = function(clone) {

		return merge(clone === true, false, arguments);

	}, publicName = 'merge';

	/**
	 * Merge two or more objects recursively 
	 * @param bool? clone
	 * @param mixed,... arguments
	 * @return object
	 */

	Public.recursive = function(clone) {

		return merge(clone === true, true, arguments);

	};

	/**
	 * Clone the input removing any reference
	 * @param mixed input
	 * @return mixed
	 */

	Public.clone = function(input) {

		var output = input,
			type = typeOf(input),
			index, size;

		if (type === 'array') {

			output = [];
			size = input.length;

			for (index=0;index<size;++index)

				output[index] = Public.clone(input[index]);

		} else if (type === 'object') {

			output = {};

			for (index in input)

				output[index] = Public.clone(input[index]);

		}

		return output;

	};

	/**
	 * Merge two objects recursively
	 * @param mixed input
	 * @param mixed extend
	 * @return mixed
	 */

	function merge_recursive(base, extend) {

		if (typeOf(base) !== 'object')

			return extend;

		for (var key in extend) {

			if (typeOf(base[key]) === 'object' && typeOf(extend[key]) === 'object') {

				base[key] = merge_recursive(base[key], extend[key]);

			} else {

				base[key] = extend[key];

			}

		}

		return base;

	}

	/**
	 * Merge two or more objects
	 * @param bool clone
	 * @param bool recursive
	 * @param array argv
	 * @return object
	 */

	function merge(clone, recursive, argv) {

		var result = argv[0],
			size = argv.length;

		if (clone || typeOf(result) !== 'object')

			result = {};

		for (var index=0;index<size;++index) {

			var item = argv[index],

				type = typeOf(item);

			if (type !== 'object') continue;

			for (var key in item) {

				if (key === '__proto__') continue;

				var sitem = clone ? Public.clone(item[key]) : item[key];

				if (recursive) {

					result[key] = merge_recursive(result[key], sitem);

				} else {

					result[key] = sitem;

				}

			}

		}

		return result;

	}

	/**
	 * Get type of variable
	 * @param mixed input
	 * @return string
	 *
	 * @see http://jsperf.com/typeofvar
	 */

	function typeOf(input) {

		return ({}).toString.call(input).slice(8, -1).toLowerCase();

	}

	if (isNode) {

		module.exports = Public;

	} else {

		window[publicName] = Public;

	}

})(typeof module === 'object' && module && typeof module.exports === 'object' && module.exports);
},{}],12:[function(require,module,exports){
/**
  # normalice

  Normalize an ice server configuration object (or plain old string) into a format
  that is usable in all browsers supporting WebRTC.  Primarily this module is designed
  to help with the transition of the `url` attribute of the configuration object to
  the `urls` attribute.

  ## Example Usage

  <<< examples/simple.js

**/

var protocols = [
  'stun:',
  'turn:'
];

module.exports = function(input) {
  var url = (input || {}).url || input;
  var protocol;
  var parts;
  var output = {};

  // if we don't have a string url, then allow the input to passthrough
  if (typeof url != 'string' && (! (url instanceof String))) {
    return input;
  }

  // trim the url string, and convert to an array
  url = url.trim();

  // if the protocol is not known, then passthrough
  protocol = protocols[protocols.indexOf(url.slice(0, 5))];
  if (! protocol) {
    return input;
  }

  // now let's attack the remaining url parts
  url = url.slice(5);
  parts = url.split('@');

  output.username = input.username;
  output.credential = input.credential;
  // if we have an authentication part, then set the credentials
  if (parts.length > 1) {
    url = parts[1];
    parts = parts[0].split(':');

    // add the output credential and username
    output.username = parts[0];
    output.credential = (input || {}).credential || parts[1] || '';
  }

  output.url = protocol + url;
  output.urls = [ output.url ];

  return output;
};

},{}],13:[function(require,module,exports){
var grammar = module.exports = {
  v: [{
      name: 'version',
      reg: /^(\d*)$/
  }],
  o: [{ //o=- 20518 0 IN IP4 203.0.113.1
    // NB: sessionId will be a String in most cases because it is huge
    name: 'origin',
    reg: /^(\S*) (\d*) (\d*) (\S*) IP(\d) (\S*)/,
    names: ['username', 'sessionId', 'sessionVersion', 'netType', 'ipVer', 'address'],
    format: "%s %s %d %s IP%d %s"
  }],
  // default parsing of these only (though some of these feel outdated)
  s: [{ name: 'name' }],
  i: [{ name: 'description' }],
  u: [{ name: 'uri' }],
  e: [{ name: 'email' }],
  p: [{ name: 'phone' }],
  z: [{ name: 'timezones' }], // TODO: this one can actually be parsed properly..
  r: [{ name: 'repeats' }],   // TODO: this one can also be parsed properly
  //k: [{}], // outdated thing ignored
  t: [{ //t=0 0
    name: 'timing',
    reg: /^(\d*) (\d*)/,
    names: ['start', 'stop'],
    format: "%d %d"
  }],
  c: [{ //c=IN IP4 10.47.197.26
      name: 'connection',
      reg: /^IN IP(\d) (\S*)/,
      names: ['version', 'ip'],
      format: "IN IP%d %s"
  }],
  b: [{ //b=AS:4000
      push: 'bandwidth',
      reg: /^(TIAS|AS|CT|RR|RS):(\d*)/,
      names: ['type', 'limit'],
      format: "%s:%s"
  }],
  m: [{ //m=video 51744 RTP/AVP 126 97 98 34 31
      // NB: special - pushes to session
      // TODO: rtp/fmtp should be filtered by the payloads found here?
      reg: /^(\w*) (\d*) ([\w\/]*)(?: (.*))?/,
      names: ['type', 'port', 'protocol', 'payloads'],
      format: "%s %d %s %s"
  }],
  a: [
    { //a=rtpmap:110 opus/48000/2
      push: 'rtp',
      reg: /^rtpmap:(\d*) ([\w\-]*)(?:\s*\/(\d*)(?:\s*\/(\S*))?)?/,
      names: ['payload', 'codec', 'rate', 'encoding'],
      format: function (o) {
        return (o.encoding) ?
          "rtpmap:%d %s/%s/%s":
          o.rate ?
          "rtpmap:%d %s/%s":
          "rtpmap:%d %s";
      }
    },
    {
      //a=fmtp:108 profile-level-id=24;object=23;bitrate=64000
      //a=fmtp:111 minptime=10; useinbandfec=1
      push: 'fmtp',
      reg: /^fmtp:(\d*) ([\S| ]*)/,
      names: ['payload', 'config'],
      format: "fmtp:%d %s"
    },
    { //a=control:streamid=0
        name: 'control',
        reg: /^control:(.*)/,
        format: "control:%s"
    },
    { //a=rtcp:65179 IN IP4 193.84.77.194
      name: 'rtcp',
      reg: /^rtcp:(\d*)(?: (\S*) IP(\d) (\S*))?/,
      names: ['port', 'netType', 'ipVer', 'address'],
      format: function (o) {
        return (o.address != null) ?
          "rtcp:%d %s IP%d %s":
          "rtcp:%d";
      }
    },
    { //a=rtcp-fb:98 trr-int 100
      push: 'rtcpFbTrrInt',
      reg: /^rtcp-fb:(\*|\d*) trr-int (\d*)/,
      names: ['payload', 'value'],
      format: "rtcp-fb:%d trr-int %d"
    },
    { //a=rtcp-fb:98 nack rpsi
      push: 'rtcpFb',
      reg: /^rtcp-fb:(\*|\d*) ([\w-_]*)(?: ([\w-_]*))?/,
      names: ['payload', 'type', 'subtype'],
      format: function (o) {
        return (o.subtype != null) ?
          "rtcp-fb:%s %s %s":
          "rtcp-fb:%s %s";
      }
    },
    { //a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
      //a=extmap:1/recvonly URI-gps-string
      push: 'ext',
      reg: /^extmap:([\w_\/]*) (\S*)(?: (\S*))?/,
      names: ['value', 'uri', 'config'], // value may include "/direction" suffix
      format: function (o) {
        return (o.config != null) ?
          "extmap:%s %s %s":
          "extmap:%s %s";
      }
    },
    {
      //a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:PS1uQCVeeCFCanVmcjkpPywjNWhcYD0mXXtxaVBR|2^20|1:32
      push: 'crypto',
      reg: /^crypto:(\d*) ([\w_]*) (\S*)(?: (\S*))?/,
      names: ['id', 'suite', 'config', 'sessionConfig'],
      format: function (o) {
        return (o.sessionConfig != null) ?
          "crypto:%d %s %s %s":
          "crypto:%d %s %s";
      }
    },
    { //a=setup:actpass
      name: 'setup',
      reg: /^setup:(\w*)/,
      format: "setup:%s"
    },
    { //a=mid:1
      name: 'mid',
      reg: /^mid:([^\s]*)/,
      format: "mid:%s"
    },
    { //a=msid:0c8b064d-d807-43b4-b434-f92a889d8587 98178685-d409-46e0-8e16-7ef0db0db64a
      name: 'msid',
      reg: /^msid:(.*)/,
      format: "msid:%s"
    },
    { //a=ptime:20
      name: 'ptime',
      reg: /^ptime:(\d*)/,
      format: "ptime:%d"
    },
    { //a=maxptime:60
      name: 'maxptime',
      reg: /^maxptime:(\d*)/,
      format: "maxptime:%d"
    },
    { //a=sendrecv
      name: 'direction',
      reg: /^(sendrecv|recvonly|sendonly|inactive)/
    },
    { //a=ice-lite
      name: 'icelite',
      reg: /^(ice-lite)/
    },
    { //a=ice-ufrag:F7gI
      name: 'iceUfrag',
      reg: /^ice-ufrag:(\S*)/,
      format: "ice-ufrag:%s"
    },
    { //a=ice-pwd:x9cml/YzichV2+XlhiMu8g
      name: 'icePwd',
      reg: /^ice-pwd:(\S*)/,
      format: "ice-pwd:%s"
    },
    { //a=fingerprint:SHA-1 00:11:22:33:44:55:66:77:88:99:AA:BB:CC:DD:EE:FF:00:11:22:33
      name: 'fingerprint',
      reg: /^fingerprint:(\S*) (\S*)/,
      names: ['type', 'hash'],
      format: "fingerprint:%s %s"
    },
    {
      //a=candidate:0 1 UDP 2113667327 203.0.113.1 54400 typ host
      //a=candidate:1162875081 1 udp 2113937151 192.168.34.75 60017 typ host generation 0
      //a=candidate:3289912957 2 udp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 generation 0
      //a=candidate:229815620 1 tcp 1518280447 192.168.150.19 60017 typ host tcptype active generation 0
      //a=candidate:3289912957 2 tcp 1845501695 193.84.77.194 60017 typ srflx raddr 192.168.34.75 rport 60017 tcptype passive generation 0
      push:'candidates',
      reg: /^candidate:(\S*) (\d*) (\S*) (\d*) (\S*) (\d*) typ (\S*)(?: raddr (\S*) rport (\d*))?(?: tcptype (\S*))?(?: generation (\d*))?/,
      names: ['foundation', 'component', 'transport', 'priority', 'ip', 'port', 'type', 'raddr', 'rport', 'tcptype', 'generation'],
      format: function (o) {
        var str = "candidate:%s %d %s %d %s %d typ %s";

        str += (o.raddr != null) ? " raddr %s rport %d" : "%v%v";

        // NB: candidate has three optional chunks, so %void middles one if it's missing
        str += (o.tcptype != null) ? " tcptype %s" : "%v";

        if (o.generation != null) {
          str += " generation %d";
        }
        return str;
      }
    },
    { //a=end-of-candidates (keep after the candidates line for readability)
      name: 'endOfCandidates',
      reg: /^(end-of-candidates)/
    },
    { //a=remote-candidates:1 203.0.113.1 54400 2 203.0.113.1 54401 ...
      name: 'remoteCandidates',
      reg: /^remote-candidates:(.*)/,
      format: "remote-candidates:%s"
    },
    { //a=ice-options:google-ice
      name: 'iceOptions',
      reg: /^ice-options:(\S*)/,
      format: "ice-options:%s"
    },
    { //a=ssrc:2566107569 cname:t9YU8M1UxTF8Y1A1
      push: "ssrcs",
      reg: /^ssrc:(\d*) ([\w_]*):(.*)/,
      names: ['id', 'attribute', 'value'],
      format: "ssrc:%d %s:%s"
    },
    { //a=ssrc-group:FEC 1 2
      push: "ssrcGroups",
      reg: /^ssrc-group:(\w*) (.*)/,
      names: ['semantics', 'ssrcs'],
      format: "ssrc-group:%s %s"
    },
    { //a=msid-semantic: WMS Jvlam5X3SX1OP6pn20zWogvaKJz5Hjf9OnlV
      name: "msidSemantic",
      reg: /^msid-semantic:\s?(\w*) (\S*)/,
      names: ['semantic', 'token'],
      format: "msid-semantic: %s %s" // space after ":" is not accidental
    },
    { //a=group:BUNDLE audio video
      push: 'groups',
      reg: /^group:(\w*) (.*)/,
      names: ['type', 'mids'],
      format: "group:%s %s"
    },
    { //a=rtcp-mux
      name: 'rtcpMux',
      reg: /^(rtcp-mux)/
    },
    { //a=rtcp-rsize
      name: 'rtcpRsize',
      reg: /^(rtcp-rsize)/
    },
    { // any a= that we don't understand is kepts verbatim on media.invalid
      push: 'invalid',
      names: ["value"]
    }
  ]
};

// set sensible defaults to avoid polluting the grammar with boring details
Object.keys(grammar).forEach(function (key) {
  var objs = grammar[key];
  objs.forEach(function (obj) {
    if (!obj.reg) {
      obj.reg = /(.*)/;
    }
    if (!obj.format) {
      obj.format = "%s";
    }
  });
});

},{}],14:[function(require,module,exports){
var parser = require('./parser');
var writer = require('./writer');

exports.write = writer;
exports.parse = parser.parse;
exports.parseFmtpConfig = parser.parseFmtpConfig;
exports.parsePayloads = parser.parsePayloads;
exports.parseRemoteCandidates = parser.parseRemoteCandidates;

},{"./parser":15,"./writer":16}],15:[function(require,module,exports){
var toIntIfInt = function (v) {
  return String(Number(v)) === v ? Number(v) : v;
};

var attachProperties = function (match, location, names, rawName) {
  if (rawName && !names) {
    location[rawName] = toIntIfInt(match[1]);
  }
  else {
    for (var i = 0; i < names.length; i += 1) {
      if (match[i+1] != null) {
        location[names[i]] = toIntIfInt(match[i+1]);
      }
    }
  }
};

var parseReg = function (obj, location, content) {
  var needsBlank = obj.name && obj.names;
  if (obj.push && !location[obj.push]) {
    location[obj.push] = [];
  }
  else if (needsBlank && !location[obj.name]) {
    location[obj.name] = {};
  }
  var keyLocation = obj.push ?
    {} :  // blank object that will be pushed
    needsBlank ? location[obj.name] : location; // otherwise, named location or root

  attachProperties(content.match(obj.reg), keyLocation, obj.names, obj.name);

  if (obj.push) {
    location[obj.push].push(keyLocation);
  }
};

var grammar = require('./grammar');
var validLine = RegExp.prototype.test.bind(/^([a-z])=(.*)/);

exports.parse = function (sdp) {
  var session = {}
    , media = []
    , location = session; // points at where properties go under (one of the above)

  // parse lines we understand
  sdp.split(/(\r\n|\r|\n)/).filter(validLine).forEach(function (l) {
    var type = l[0];
    var content = l.slice(2);
    if (type === 'm') {
      media.push({rtp: [], fmtp: []});
      location = media[media.length-1]; // point at latest media line
    }

    for (var j = 0; j < (grammar[type] || []).length; j += 1) {
      var obj = grammar[type][j];
      if (obj.reg.test(content)) {
        return parseReg(obj, location, content);
      }
    }
  });

  session.media = media; // link it up
  return session;
};

var fmtpReducer = function (acc, expr) {
  var s = expr.split('=');
  if (s.length === 2) {
    acc[s[0]] = toIntIfInt(s[1]);
  }
  return acc;
};

exports.parseFmtpConfig = function (str) {
  return str.split(/\;\s?/).reduce(fmtpReducer, {});
};

exports.parsePayloads = function (str) {
  return str.split(' ').map(Number);
};

exports.parseRemoteCandidates = function (str) {
  var candidates = [];
  var parts = str.split(' ').map(toIntIfInt);
  for (var i = 0; i < parts.length; i += 3) {
    candidates.push({
      component: parts[i],
      ip: parts[i + 1],
      port: parts[i + 2]
    });
  }
  return candidates;
};

},{"./grammar":13}],16:[function(require,module,exports){
var grammar = require('./grammar');

// customized util.format - discards excess arguments and can void middle ones
var formatRegExp = /%[sdv%]/g;
var format = function (formatStr) {
  var i = 1;
  var args = arguments;
  var len = args.length;
  return formatStr.replace(formatRegExp, function (x) {
    if (i >= len) {
      return x; // missing argument
    }
    var arg = args[i];
    i += 1;
    switch (x) {
      case '%%':
        return '%';
      case '%s':
        return String(arg);
      case '%d':
        return Number(arg);
      case '%v':
        return '';
    }
  });
  // NB: we discard excess arguments - they are typically undefined from makeLine
};

var makeLine = function (type, obj, location) {
  var str = obj.format instanceof Function ?
    (obj.format(obj.push ? location : location[obj.name])) :
    obj.format;

  var args = [type + '=' + str];
  if (obj.names) {
    for (var i = 0; i < obj.names.length; i += 1) {
      var n = obj.names[i];
      if (obj.name) {
        args.push(location[obj.name][n]);
      }
      else { // for mLine and push attributes
        args.push(location[obj.names[i]]);
      }
    }
  }
  else {
    args.push(location[obj.name]);
  }
  return format.apply(null, args);
};

// RFC specified order
// TODO: extend this with all the rest
var defaultOuterOrder = [
  'v', 'o', 's', 'i',
  'u', 'e', 'p', 'c',
  'b', 't', 'r', 'z', 'a'
];
var defaultInnerOrder = ['i', 'c', 'b', 'a'];


module.exports = function (session, opts) {
  opts = opts || {};
  // ensure certain properties exist
  if (session.version == null) {
    session.version = 0; // "v=0" must be there (only defined version atm)
  }
  if (session.name == null) {
    session.name = " "; // "s= " must be there if no meaningful name set
  }
  session.media.forEach(function (mLine) {
    if (mLine.payloads == null) {
      mLine.payloads = "";
    }
  });

  var outerOrder = opts.outerOrder || defaultOuterOrder;
  var innerOrder = opts.innerOrder || defaultInnerOrder;
  var sdp = [];

  // loop through outerOrder for matching properties on session
  outerOrder.forEach(function (type) {
    grammar[type].forEach(function (obj) {
      if (obj.name in session && session[obj.name] != null) {
        sdp.push(makeLine(type, obj, session));
      }
      else if (obj.push in session && session[obj.push] != null) {
        session[obj.push].forEach(function (el) {
          sdp.push(makeLine(type, obj, el));
        });
      }
    });
  });

  // then for each media line, follow the innerOrder
  session.media.forEach(function (mLine) {
    sdp.push(makeLine('m', grammar.m[0], mLine));

    innerOrder.forEach(function (type) {
      grammar[type].forEach(function (obj) {
        if (obj.name in mLine && mLine[obj.name] != null) {
          sdp.push(makeLine(type, obj, mLine));
        }
        else if (obj.push in mLine && mLine[obj.push] != null) {
          mLine[obj.push].forEach(function (el) {
            sdp.push(makeLine(type, obj, el));
          });
        }
      });
    });
  });

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

},{"./grammar":13}],17:[function(require,module,exports){
/* Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

module.exports = function arrayEquals(array) {
    // if the other array is a falsy value, return
    if (!array)
        return false;

    // compare lengths - can save a lot of time
    if (this.length != array.length)
        return false;

    for (var i = 0, l = this.length; i < l; i++) {
        // Check if we have nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse into the nested arrays
            if (!arrayEquals.apply(this[i], [array[i]]))
                return false;
        } else if (this[i] != array[i]) {
            // Warning - two different object instances will never be equal:
            // {x:20} != {x:20}
            return false;
        }
    }
    return true;
};


},{}],18:[function(require,module,exports){
/* Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

exports.Interop = require('./interop');

},{"./interop":19}],19:[function(require,module,exports){
/* Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* global RTCSessionDescription */
/* global RTCIceCandidate */
/* jshint -W097 */
"use strict";

var transform = require('./transform');
var arrayEquals = require('./array-equals');

function Interop() {

    /**
     * This map holds the most recent Unified Plan offer/answer SDP that was
     * converted to Plan B, with the SDP type ('offer' or 'answer') as keys and
     * the SDP string as values.
     *
     * @type {{}}
     */
    this.cache = {
        mlB2UMap : {},
        mlU2BMap : {}
    };
}

module.exports = Interop;

/**
 * Changes the candidate args to match with the related Unified Plan
 */
Interop.prototype.candidateToUnifiedPlan = function(candidate) {
    var cand = new RTCIceCandidate(candidate);

    cand.sdpMLineIndex = this.cache.mlB2UMap[cand.sdpMLineIndex];
    /* TODO: change sdpMid to (audio|video)-SSRC */

    return cand;
};

/**
 * Changes the candidate args to match with the related Plan B
 */
Interop.prototype.candidateToPlanB = function(candidate) {
    var cand = new RTCIceCandidate(candidate);

    if (cand.sdpMid.indexOf('audio') === 0) {
      cand.sdpMid = 'audio';
    } else if (cand.sdpMid.indexOf('video') === 0) {
      cand.sdpMid = 'video';
    } else {
      throw new Error('candidate with ' + cand.sdpMid + ' not allowed');
    }

    cand.sdpMLineIndex = this.cache.mlU2BMap[cand.sdpMLineIndex];

    return cand;
};

/**
 * Returns the index of the first m-line with the given media type and with a
 * direction which allows sending, in the last Unified Plan description with
 * type "answer" converted to Plan B. Returns {null} if there is no saved
 * answer, or if none of its m-lines with the given type allow sending.
 * @param type the media type ("audio" or "video").
 * @returns {*}
 */
Interop.prototype.getFirstSendingIndexFromAnswer = function(type) {
    if (!this.cache.answer) {
        return null;
    }

    var session = transform.parse(this.cache.answer);
    if (session && session.media && Array.isArray(session.media)){
        for (var i = 0; i < session.media.length; i++) {
            if (session.media[i].type == type &&
                (!session.media[i].direction /* default to sendrecv */ ||
                    session.media[i].direction === 'sendrecv' ||
                    session.media[i].direction === 'sendonly')){
                return i;
            }
        }
    }

    return null;
};

/**
 * This method transforms a Unified Plan SDP to an equivalent Plan B SDP. A
 * PeerConnection wrapper transforms the SDP to Plan B before passing it to the
 * application.
 *
 * @param desc
 * @returns {*}
 */
Interop.prototype.toPlanB = function(desc) {
    var self = this;
    //#region Preliminary input validation.

    if (typeof desc !== 'object' || desc === null ||
        typeof desc.sdp !== 'string') {
        console.warn('An empty description was passed as an argument.');
        return desc;
    }

    // Objectify the SDP for easier manipulation.
    var session = transform.parse(desc.sdp);

    // If the SDP contains no media, there's nothing to transform.
    if (typeof session.media === 'undefined' ||
        !Array.isArray(session.media) || session.media.length === 0) {
        console.warn('The description has no media.');
        return desc;
    }

    // Try some heuristics to "make sure" this is a Unified Plan SDP. Plan B
    // SDP has a video, an audio and a data "channel" at most.
    if (session.media.length <= 3 && session.media.every(function(m) {
            return ['video', 'audio', 'data'].indexOf(m.mid) !== -1;
        })) {
        console.warn('This description does not look like Unified Plan.');
        return desc;
    }

    //#endregion

    // HACK https://bugzilla.mozilla.org/show_bug.cgi?id=1113443
    var sdp = desc.sdp;
    var rewrite = false;
    for (var i = 0; i < session.media.length; i++) {
        var uLine = session.media[i];
        uLine.rtp.forEach(function(rtp) {
            if (rtp.codec === 'NULL')
            {
                rewrite = true;
                var offer = transform.parse(self.cache.offer);
                rtp.codec = offer.media[i].rtp[0].codec;
            }
        });
    }
    if (rewrite) {
        sdp = transform.write(session);
    }

    // Unified Plan SDP is our "precious". Cache it for later use in the Plan B
    // -> Unified Plan transformation.
    this.cache[desc.type] = sdp;

    //#region Convert from Unified Plan to Plan B.

    // We rebuild the session.media array.
    var media = session.media;
    session.media = [];

    // Associative array that maps channel types to channel objects for fast
    // access to channel objects by their type, e.g. type2bl['audio']->channel
    // obj.
    var type2bl = {};

    // Used to build the group:BUNDLE value after the channels construction
    // loop.
    var types = [];

    media.forEach(function(uLine) {
        // rtcp-mux is required in the Plan B SDP.
        if ((typeof uLine.rtcpMux !== 'string' ||
            uLine.rtcpMux !== 'rtcp-mux') &&
            uLine.direction !== 'inactive') {
            throw new Error('Cannot convert to Plan B because m-lines ' +
                'without the rtcp-mux attribute were found.');
        }

        // If we don't have a channel for this uLine.type OR the selected is
        // inactive, then select this uLine as the channel basis.
        if (typeof type2bl[uLine.type] === 'undefined' ||
            type2bl[uLine.type].direction === 'inactive') {
            type2bl[uLine.type] = uLine;
        }

        if (uLine.protocol != type2bl[uLine.type].protocol) {
          throw new Error('Cannot convert to Plan B because m-lines ' +
              'have different protocols and this library does not have ' +
              'support for that');
        }

        if (uLine.payloads != type2bl[uLine.type].payloads) {
          throw new Error('Cannot convert to Plan B because m-lines ' +
              'have different payloads and this library does not have ' +
              'support for that');
        }

    });

    // Implode the Unified Plan m-lines/tracks into Plan B channels.
    media.forEach(function(uLine) {
        if (uLine.type === 'application') {
            session.media.push(uLine);
            types.push(uLine.mid);
            return;
        }

        // Add sources to the channel and handle a=msid.
        if (typeof uLine.sources === 'object') {
            Object.keys(uLine.sources).forEach(function(ssrc) {
                if (typeof type2bl[uLine.type].sources !== 'object')
                    type2bl[uLine.type].sources = {};

                // Assign the sources to the channel.
                type2bl[uLine.type].sources[ssrc] =
                    uLine.sources[ssrc];

                if (typeof uLine.msid !== 'undefined') {
                    // In Plan B the msid is an SSRC attribute. Also, we don't
                    // care about the obsolete label and mslabel attributes.
                    //
                    // Note that it is not guaranteed that the uLine will
                    // have an msid. recvonly channels in particular don't have
                    // one.
                    type2bl[uLine.type].sources[ssrc].msid =
                        uLine.msid;
                }
                // NOTE ssrcs in ssrc groups will share msids, as
                // draft-uberti-rtcweb-plan-00 mandates.
            });
        }

        // Add ssrc groups to the channel.
        if (typeof uLine.ssrcGroups !== 'undefined' &&
                Array.isArray(uLine.ssrcGroups)) {

            // Create the ssrcGroups array, if it's not defined.
            if (typeof type2bl[uLine.type].ssrcGroups === 'undefined' ||
                    !Array.isArray(type2bl[uLine.type].ssrcGroups)) {
                type2bl[uLine.type].ssrcGroups = [];
            }

            type2bl[uLine.type].ssrcGroups =
                type2bl[uLine.type].ssrcGroups.concat(
                    uLine.ssrcGroups);
        }

        if (type2bl[uLine.type] === uLine) {
            // Plan B mids are in ['audio', 'video', 'data']
            uLine.mid = uLine.type;

            // Plan B doesn't support/need the bundle-only attribute.
            delete uLine.bundleOnly;

            // In Plan B the msid is an SSRC attribute.
            delete uLine.msid;

	    if (uLine.type == media[0].type) {
	      types.unshift(uLine.type);
	      // Add the channel to the new media array.
	      session.media.unshift(uLine);
	    } else {
	      types.push(uLine.type);
	      // Add the channel to the new media array.
	      session.media.push(uLine);
	    }
        }
    });

    if (typeof session.groups !== 'undefined') {
      // We regenerate the BUNDLE group with the new mids.
      session.groups.some(function(group) {
	  if (group.type === 'BUNDLE') {
	      group.mids = types.join(' ');
	      return true;
	  }
      });
    }

    // msid semantic
    session.msidSemantic = {
        semantic: 'WMS',
        token: '*'
    };

    var resStr = transform.write(session);

    return new RTCSessionDescription({
        type: desc.type,
        sdp: resStr
    });

    //#endregion
};

/* follow rules defined in RFC4145 */
function addSetupAttr(uLine) {
    if (typeof uLine.setup === 'undefined') {
        return;
    }

    if (uLine.setup === "active") {
            uLine.setup = "passive";
    } else if (uLine.setup === "passive") {
        uLine.setup = "active";
    }
}

/**
 * This method transforms a Plan B SDP to an equivalent Unified Plan SDP. A
 * PeerConnection wrapper transforms the SDP to Unified Plan before passing it
 * to FF.
 *
 * @param desc
 * @returns {*}
 */
Interop.prototype.toUnifiedPlan = function(desc) {
    var self = this;
    //#region Preliminary input validation.

    if (typeof desc !== 'object' || desc === null ||
        typeof desc.sdp !== 'string') {
        console.warn('An empty description was passed as an argument.');
        return desc;
    }

    var session = transform.parse(desc.sdp);

    // If the SDP contains no media, there's nothing to transform.
    if (typeof session.media === 'undefined' ||
        !Array.isArray(session.media) || session.media.length === 0) {
        console.warn('The description has no media.');
        return desc;
    }

    // Try some heuristics to "make sure" this is a Plan B SDP. Plan B SDP has
    // a video, an audio and a data "channel" at most.
    if (session.media.length > 3 || !session.media.every(function(m) {
            return ['video', 'audio', 'data'].indexOf(m.mid) !== -1;
        })) {
        console.warn('This description does not look like Plan B.');
        return desc;
    }

    // Make sure this Plan B SDP can be converted to a Unified Plan SDP.
    var mids = [];
    session.media.forEach(function(m) {
        mids.push(m.mid);
    });

    var hasBundle = false;
    if (typeof session.groups !== 'undefined' &&
        Array.isArray(session.groups)) {
        hasBundle = session.groups.every(function(g) {
            return g.type !== 'BUNDLE' ||
                arrayEquals.apply(g.mids.sort(), [mids.sort()]);
        });
    }

    if (!hasBundle) {
        var mustBeBundle = false;

        session.media.forEach(function(m) {
            if (m.direction !== 'inactive') {
                mustBeBundle = true;
            }
        });

        if (mustBeBundle) {
            throw new Error("Cannot convert to Unified Plan because m-lines that" +
              " are not bundled were found.");
        }
    }

    //#endregion


    //#region Convert from Plan B to Unified Plan.

    // Unfortunately, a Plan B offer/answer doesn't have enough information to
    // rebuild an equivalent Unified Plan offer/answer.
    //
    // For example, if this is a local answer (in Unified Plan style) that we
    // convert to Plan B prior to handing it over to the application (the
    // PeerConnection wrapper called us, for instance, after a successful
    // createAnswer), we want to remember the m-line at which we've seen the
    // (local) SSRC. That's because when the application wants to do call the
    // SLD method, forcing us to do the inverse transformation (from Plan B to
    // Unified Plan), we need to know to which m-line to assign the (local)
    // SSRC. We also need to know all the other m-lines that the original
    // answer had and include them in the transformed answer as well.
    //
    // Another example is if this is a remote offer that we convert to Plan B
    // prior to giving it to the application, we want to remember the mid at
    // which we've seen the (remote) SSRC.
    //
    // In the iteration that follows, we use the cached Unified Plan (if it
    // exists) to assign mids to ssrcs.

    var type;
    if (desc.type === 'answer') {
        type = 'offer';
    } else if (desc.type === 'offer') {
        type = 'answer';
    } else {
        throw new Error("Type '" + desc.type + "' not supported.");
    }

    var cached;
    if (typeof this.cache[type] !== 'undefined') {
        cached = transform.parse(this.cache[type]);
    }

    var recvonlySsrcs = {
        audio: {},
        video: {}
    };

    // A helper map that sends mids to m-line objects. We use it later to
    // rebuild the Unified Plan style session.media array.
    var mid2ul = {};
    var bIdx = 0;
    var uIdx = 0;

    var sources2ul = {};

    var candidates;
    var iceUfrag;
    var icePwd;
    var fingerprint;
    var payloads = {};
    var rtcpFb = {};
    var rtp = {};

    session.media.forEach(function(bLine) {
        if ((typeof bLine.rtcpMux !== 'string' ||
            bLine.rtcpMux !== 'rtcp-mux') &&
            bLine.direction !== 'inactive') {
            throw new Error("Cannot convert to Unified Plan because m-lines " +
                "without the rtcp-mux attribute were found.");
        }

        if (bLine.type === 'application') {
            mid2ul[bLine.mid] = bLine;
            return;
        }

        // With rtcp-mux and bundle all the channels should have the same ICE
        // stuff.
        var sources = bLine.sources;
        var ssrcGroups = bLine.ssrcGroups;
        var port = bLine.port;

        /* Chrome adds different candidates even using bundle, so we concat the candidates list */
        if (typeof bLine.candidates != 'undefined') {
            if (typeof candidates != 'undefined') {
                candidates = candidates.concat(bLine.candidates);
            } else {
                candidates = bLine.candidates;
            }
        }

        if ((typeof iceUfrag != 'undefined') && (typeof bLine.iceUfrag != 'undefined') && (iceUfrag != bLine.iceUfrag)) {
            throw new Error("Only BUNDLE supported, iceUfrag must be the same for all m-lines.\n" +
                            "\tLast iceUfrag: " + iceUfrag + "\n" +
                            "\tNew iceUfrag: " + bLine.iceUfrag
            );
        }

        if (typeof bLine.iceUfrag != 'undefined') {
                iceUfrag = bLine.iceUfrag;
        }

        if ((typeof icePwd != 'undefined') && (typeof bLine.icePwd != 'undefined') && (icePwd != bLine.icePwd)) {
            throw new Error("Only BUNDLE supported, icePwd must be the same for all m-lines.\n" +
                            "\tLast icePwd: " + icePwd + "\n" +
                            "\tNew icePwd: " + bLine.icePwd
            );
        }

        if (typeof bLine.icePwd != 'undefined') {
                icePwd = bLine.icePwd;
        }

        if ((typeof fingerprint != 'undefined') && (typeof bLine.fingerprint != 'undefined') &&
            (fingerprint.type != bLine.fingerprint.type || fingerprint.hash != bLine.fingerprint.hash)) {
            throw new Error("Only BUNDLE supported, fingerprint must be the same for all m-lines.\n" +
                            "\tLast fingerprint: " + JSON.stringify(fingerprint) + "\n" +
                            "\tNew fingerprint: " + JSON.stringify(bLine.fingerprint)
            );
        }

        if (typeof bLine.fingerprint != 'undefined') {
                fingerprint = bLine.fingerprint;
        }

        payloads[bLine.type] = bLine.payloads;
        rtcpFb[bLine.type] = bLine.rtcpFb;
        rtp[bLine.type] = bLine.rtp;

        // inverted ssrc group map
        var ssrc2group = {};
        if (typeof ssrcGroups !== 'undefined' && Array.isArray(ssrcGroups)) {
            ssrcGroups.forEach(function (ssrcGroup) {
                // XXX This might brake if an SSRC is in more than one group
                // for some reason.
                if (typeof ssrcGroup.ssrcs !== 'undefined' &&
                    Array.isArray(ssrcGroup.ssrcs)) {
                    ssrcGroup.ssrcs.forEach(function (ssrc) {
                        if (typeof ssrc2group[ssrc] === 'undefined') {
                            ssrc2group[ssrc] = [];
                        }

                        ssrc2group[ssrc].push(ssrcGroup);
                    });
                }
            });
        }

        // ssrc to m-line index.
        var ssrc2ml = {};

        if (typeof sources === 'object') {

            // We'll use the "bLine" object as a prototype for each new "mLine"
            // that we create, but first we need to clean it up a bit.
            delete bLine.sources;
            delete bLine.ssrcGroups;
            delete bLine.candidates;
            delete bLine.iceUfrag;
            delete bLine.icePwd;
            delete bLine.fingerprint;
            delete bLine.port;
            delete bLine.mid;

            // Explode the Plan B channel sources with one m-line per source.
            Object.keys(sources).forEach(function(ssrc) {

                // The (unified) m-line for this SSRC. We either create it from
                // scratch or, if it's a grouped SSRC, we re-use a related
                // mline. In other words, if the source is grouped with another
                // source, put the two together in the same m-line.
                var uLine;

                // We assume here that we are the answerer in the O/A, so any
                // offers which we translate come from the remote side, while
                // answers are local. So the check below is to make that we
                // handle receive-only SSRCs in a special way only if they come
                // from the remote side.
                if (desc.type==='offer') {
                    // We want to detect SSRCs which are used by a remote peer
                    // in an m-line with direction=recvonly (i.e. they are
                    // being used for RTCP only).
                    // This information would have gotten lost if the remote
                    // peer used Unified Plan and their local description was
                    // translated to Plan B. So we use the lack of an MSID
                    // attribute to deduce a "receive only" SSRC.
                    if (!sources[ssrc].msid) {
                        recvonlySsrcs[bLine.type][ssrc] = sources[ssrc];
                        // Receive-only SSRCs must not create new m-lines. We
                        // will assign them to an existing m-line later.
                        return;
                    }
                }

                if (typeof ssrc2group[ssrc] !== 'undefined' &&
                    Array.isArray(ssrc2group[ssrc])) {
                    ssrc2group[ssrc].some(function (ssrcGroup) {
                        // ssrcGroup.ssrcs *is* an Array, no need to check
                        // again here.
                        return ssrcGroup.ssrcs.some(function (related) {
                            if (typeof ssrc2ml[related] === 'object') {
                                uLine = ssrc2ml[related];
                                return true;
                            }
                        });
                    });
                }

                if (typeof uLine === 'object') {
                    // the m-line already exists. Just add the source.
                    uLine.sources[ssrc] = sources[ssrc];
                    delete sources[ssrc].msid;
                } else {
                    // Use the "bLine" as a prototype for the "uLine".
                    uLine = Object.create(bLine);
                    ssrc2ml[ssrc] = uLine;

                    if (typeof sources[ssrc].msid !== 'undefined') {
                        // Assign the msid of the source to the m-line. Note
                        // that it is not guaranteed that the source will have
                        // msid. In particular "recvonly" sources don't have an
                        // msid. Note that "recvonly" is a term only defined
                        // for m-lines.
                        uLine.msid = sources[ssrc].msid;
                        delete sources[ssrc].msid;
                    }

                    // We assign one SSRC per media line.
                    uLine.sources = {};
                    uLine.sources[ssrc] = sources[ssrc];
                    uLine.ssrcGroups = ssrc2group[ssrc];

                    // Use the cached Unified Plan SDP (if it exists) to assign
                    // SSRCs to mids.
                    if (typeof cached !== 'undefined' &&
                        typeof cached.media !== 'undefined' &&
                        Array.isArray(cached.media)) {

                        cached.media.forEach(function (m) {
                            if (typeof m.sources === 'object') {
                                Object.keys(m.sources).forEach(function (s) {
                                    if (s === ssrc) {
                                        uLine.mid = m.mid;
                                    }
                                });
                            }
                        });
                    }

                    if (typeof uLine.mid === 'undefined') {

                        // If this is an SSRC that we see for the first time
                        // assign it a new mid. This is typically the case when
                        // this method is called to transform a remote
                        // description for the first time or when there is a
                        // new SSRC in the remote description because a new
                        // peer has joined the conference. Local SSRCs should
                        // have already been added to the map in the toPlanB
                        // method.
                        //
                        // Because FF generates answers in Unified Plan style,
                        // we MUST already have a cached answer with all the
                        // local SSRCs mapped to some m-line/mid.

                        uLine.mid = [bLine.type, '-', ssrc].join('');
                    }

                    // Include the candidates in the 1st media line.
                    uLine.candidates = candidates;
                    uLine.iceUfrag = iceUfrag;
                    uLine.icePwd = icePwd;
                    uLine.fingerprint = fingerprint;
                    uLine.port = port;

                    mid2ul[uLine.mid] = uLine;
                    sources2ul[uIdx] = uLine.sources;

                    self.cache.mlU2BMap[uIdx] = bIdx;
                    if (typeof self.cache.mlB2UMap[bIdx] === 'undefined') {
                      self.cache.mlB2UMap[bIdx] = uIdx;
                    }
                    uIdx++;
                }
            });
        } else {
          var uLine = bLine;

          uLine.candidates = candidates;
          uLine.iceUfrag = iceUfrag;
          uLine.icePwd = icePwd;
          uLine.fingerprint = fingerprint;
          uLine.port = port;

          mid2ul[uLine.mid] = uLine;

          self.cache.mlU2BMap[uIdx] = bIdx;
          if (typeof self.cache.mlB2UMap[bIdx] === 'undefined') {
            self.cache.mlB2UMap[bIdx] = uIdx;
          }
        }

        bIdx++;
    });

    // Rebuild the media array in the right order and add the missing mLines
    // (missing from the Plan B SDP).
    session.media = [];
    mids = []; // reuse

    if (desc.type === 'answer') {

        // The media lines in the answer must match the media lines in the
        // offer. The order is important too. Here we assume that Firefox is
        // the answerer, so we merely have to use the reconstructed (unified)
        // answer to update the cached (unified) answer accordingly.
        //
        // In the general case, one would have to use the cached (unified)
        // offer to find the m-lines that are missing from the reconstructed
        // answer, potentially grabbing them from the cached (unified) answer.
        // One has to be careful with this approach because inactive m-lines do
        // not always have an mid, making it tricky (impossible?) to find where
        // exactly and which m-lines are missing from the reconstructed answer.

        for (var i = 0; i < cached.media.length; i++) {
            var uLine = cached.media[i];

            delete uLine.msid;
            delete uLine.sources;
            delete uLine.ssrcGroups;

            if (typeof sources2ul[i] === 'undefined') {
              if (!uLine.direction
                  || uLine.direction === 'sendrecv')
                  uLine.direction = 'recvonly';
              else if (uLine.direction === 'sendonly')
                  uLine.direction = 'inactive';
            } else {
              if (!uLine.direction
                  || uLine.direction === 'sendrecv')
                  uLine.direction = 'sendrecv';
              else if (uLine.direction === 'recvonly')
                  uLine.direction = 'sendonly';
            }

            uLine.sources = sources2ul[i];
            uLine.candidates = candidates;
            uLine.iceUfrag = iceUfrag;
            uLine.icePwd = icePwd;
            uLine.fingerprint = fingerprint;

            uLine.rtp = rtp[uLine.type];
            uLine.payloads = payloads[uLine.type];
            uLine.rtcpFb = rtcpFb[uLine.type];

            session.media.push(uLine);

            if (typeof uLine.mid === 'string') {
                // inactive lines don't/may not have an mid.
                mids.push(uLine.mid);
            }
        }
    } else {

        // SDP offer/answer (and the JSEP spec) forbids removing an m-section
        // under any circumstances. If we are no longer interested in sending a
        // track, we just remove the msid and ssrc attributes and set it to
        // either a=recvonly (as the reofferer, we must use recvonly if the
        // other side was previously sending on the m-section, but we can also
        // leave the possibility open if it wasn't previously in use), or
        // a=inactive.

        if (typeof cached !== 'undefined' &&
            typeof cached.media !== 'undefined' &&
            Array.isArray(cached.media)) {
            cached.media.forEach(function(uLine) {
                mids.push(uLine.mid);
                if (typeof mid2ul[uLine.mid] !== 'undefined') {
                    session.media.push(mid2ul[uLine.mid]);
                } else {
                    delete uLine.msid;
                    delete uLine.sources;
                    delete uLine.ssrcGroups;

                    if (!uLine.direction
                        || uLine.direction === 'sendrecv') {
                        uLine.direction = 'sendonly';
                    }
                    if (!uLine.direction
                        || uLine.direction === 'recvonly') {
                        uLine.direction = 'inactive';
                    }

                    addSetupAttr (uLine);
                    session.media.push(uLine);
                }
            });
        }

        // Add all the remaining (new) m-lines of the transformed SDP.
        Object.keys(mid2ul).forEach(function(mid) {
            if (mids.indexOf(mid) === -1) {
                mids.push(mid);
                if (mid2ul[mid].direction === 'recvonly') {
                    // This is a remote recvonly channel. Add its SSRC to the
                    // appropriate sendrecv or sendonly channel.
                    // TODO(gp) what if we don't have sendrecv/sendonly
                    // channel?

                    var done = false;

                    session.media.some(function (uLine) {
                        if ((uLine.direction === 'sendrecv' ||
                            uLine.direction === 'sendonly') &&
                            uLine.type === mid2ul[mid].type) {
                            // mid2ul[mid] shouldn't have any ssrc-groups
                            Object.keys(mid2ul[mid].sources).forEach(
                                function (ssrc) {
                                uLine.sources[ssrc] =
                                    mid2ul[mid].sources[ssrc];
                            });

                            done = true;
                            return true;
                        }
                    });

                    if (!done) {
                        session.media.push(mid2ul[mid]);
                    }
                } else {
                    session.media.push(mid2ul[mid]);
                }
            }
        });
    }

    // After we have constructed the Plan Unified m-lines we can figure out
    // where (in which m-line) to place the 'recvonly SSRCs'.
    // Note: we assume here that we are the answerer in the O/A, so any offers
    // which we translate come from the remote side, while answers are local
    // (and so our last local description is cached as an 'answer').
    ["audio", "video"].forEach(function (type) {
        if (!session || !session.media || !Array.isArray(session.media))
            return;

        var idx = null;
        if (Object.keys(recvonlySsrcs[type]).length > 0) {
            idx = self.getFirstSendingIndexFromAnswer(type);
            if (idx === null){
                // If this is the first offer we receive, we don't have a
                // cached answer. Assume that we will be sending media using
                // the first m-line for each media type.

                for (var i = 0; i < session.media.length; i++) {
                    if (session.media[i].type === type) {
                        idx = i;
                        break;
                    }
                }
            }
        }

        if (idx && session.media.length > idx) {
            var mLine = session.media[idx];
            Object.keys(recvonlySsrcs[type]).forEach(function(ssrc) {
                if (mLine.sources && mLine.sources[ssrc]) {
                    console.warn("Replacing an existing SSRC.");
                }
                if (!mLine.sources) {
                    mLine.sources = {};
                }

                mLine.sources[ssrc] = recvonlySsrcs[type][ssrc];
            });
        }
    });

    if (typeof session.groups !== 'undefined') {
      // We regenerate the BUNDLE group (since we regenerated the mids)
      session.groups.some(function(group) {
	  if (group.type === 'BUNDLE') {
	      group.mids = mids.join(' ');
	      return true;
	  }
      });
    }

    // msid semantic
    session.msidSemantic = {
        semantic: 'WMS',
        token: '*'
    };

    var resStr = transform.write(session);

    // Cache the transformed SDP (Unified Plan) for later re-use in this
    // function.
    this.cache[desc.type] = resStr;

    return new RTCSessionDescription({
        type: desc.type,
        sdp: resStr
    });

    //#endregion
};

},{"./array-equals":17,"./transform":20}],20:[function(require,module,exports){
/* Copyright @ 2015 Atlassian Pty Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var transform = require('sdp-transform');

exports.write = function(session, opts) {

  if (typeof session !== 'undefined' &&
      typeof session.media !== 'undefined' &&
      Array.isArray(session.media)) {

    session.media.forEach(function (mLine) {
      // expand sources to ssrcs
      if (typeof mLine.sources !== 'undefined' &&
        Object.keys(mLine.sources).length !== 0) {
          mLine.ssrcs = [];
          Object.keys(mLine.sources).forEach(function (ssrc) {
            var source = mLine.sources[ssrc];
            Object.keys(source).forEach(function (attribute) {
              mLine.ssrcs.push({
                id: ssrc,
                attribute: attribute,
                value: source[attribute]
              });
            });
          });
          delete mLine.sources;
        }

      // join ssrcs in ssrc groups
      if (typeof mLine.ssrcGroups !== 'undefined' &&
        Array.isArray(mLine.ssrcGroups)) {
          mLine.ssrcGroups.forEach(function (ssrcGroup) {
            if (typeof ssrcGroup.ssrcs !== 'undefined' &&
                Array.isArray(ssrcGroup.ssrcs)) {
              ssrcGroup.ssrcs = ssrcGroup.ssrcs.join(' ');
            }
          });
        }
    });
  }

  // join group mids
  if (typeof session !== 'undefined' &&
      typeof session.groups !== 'undefined' && Array.isArray(session.groups)) {

    session.groups.forEach(function (g) {
      if (typeof g.mids !== 'undefined' && Array.isArray(g.mids)) {
        g.mids = g.mids.join(' ');
      }
    });
  }

  return transform.write(session, opts);
};

exports.parse = function(sdp) {
  var session = transform.parse(sdp);

  if (typeof session !== 'undefined' && typeof session.media !== 'undefined' &&
      Array.isArray(session.media)) {

    session.media.forEach(function (mLine) {
      // group sources attributes by ssrc
      if (typeof mLine.ssrcs !== 'undefined' && Array.isArray(mLine.ssrcs)) {
        mLine.sources = {};
        mLine.ssrcs.forEach(function (ssrc) {
          if (!mLine.sources[ssrc.id])
          mLine.sources[ssrc.id] = {};
        mLine.sources[ssrc.id][ssrc.attribute] = ssrc.value;
        });

        delete mLine.ssrcs;
      }

      // split ssrcs in ssrc groups
      if (typeof mLine.ssrcGroups !== 'undefined' &&
        Array.isArray(mLine.ssrcGroups)) {
          mLine.ssrcGroups.forEach(function (ssrcGroup) {
            if (typeof ssrcGroup.ssrcs === 'string') {
              ssrcGroup.ssrcs = ssrcGroup.ssrcs.split(' ');
            }
          });
        }
    });
  }
  // split group mids
  if (typeof session !== 'undefined' &&
      typeof session.groups !== 'undefined' && Array.isArray(session.groups)) {

    session.groups.forEach(function (g) {
      if (typeof g.mids === 'string') {
        g.mids = g.mids.split(' ');
      }
    });
  }

  return session;
};


},{"sdp-transform":14}],21:[function(require,module,exports){
/*!
 * UAParser.js v0.7.21
 * Lightweight JavaScript-based User-Agent string parser
 * https://github.com/faisalman/ua-parser-js
 *
 * Copyright © 2012-2019 Faisal Salman <[email protected]>
 * Licensed under MIT License
 */

(function (window, undefined) {

    'use strict';

    //////////////
    // Constants
    /////////////


    var LIBVERSION  = '0.7.21',
        EMPTY       = '',
        UNKNOWN     = '?',
        FUNC_TYPE   = 'function',
        UNDEF_TYPE  = 'undefined',
        OBJ_TYPE    = 'object',
        STR_TYPE    = 'string',
        MAJOR       = 'major', // deprecated
        MODEL       = 'model',
        NAME        = 'name',
        TYPE        = 'type',
        VENDOR      = 'vendor',
        VERSION     = 'version',
        ARCHITECTURE= 'architecture',
        CONSOLE     = 'console',
        MOBILE      = 'mobile',
        TABLET      = 'tablet',
        SMARTTV     = 'smarttv',
        WEARABLE    = 'wearable',
        EMBEDDED    = 'embedded';


    ///////////
    // Helper
    //////////


    var util = {
        extend : function (regexes, extensions) {
            var mergedRegexes = {};
            for (var i in regexes) {
                if (extensions[i] && extensions[i].length % 2 === 0) {
                    mergedRegexes[i] = extensions[i].concat(regexes[i]);
                } else {
                    mergedRegexes[i] = regexes[i];
                }
            }
            return mergedRegexes;
        },
        has : function (str1, str2) {
          if (typeof str1 === "string") {
            return str2.toLowerCase().indexOf(str1.toLowerCase()) !== -1;
          } else {
            return false;
          }
        },
        lowerize : function (str) {
            return str.toLowerCase();
        },
        major : function (version) {
            return typeof(version) === STR_TYPE ? version.replace(/[^\d\.]/g,'').split(".")[0] : undefined;
        },
        trim : function (str) {
          return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
        }
    };


    ///////////////
    // Map helper
    //////////////


    var mapper = {

        rgx : function (ua, arrays) {

            var i = 0, j, k, p, q, matches, match;

            // loop through all regexes maps
            while (i < arrays.length && !matches) {

                var regex = arrays[i],       // even sequence (0,2,4,..)
                    props = arrays[i + 1];   // odd sequence (1,3,5,..)
                j = k = 0;

                // try matching uastring with regexes
                while (j < regex.length && !matches) {

                    matches = regex[j++].exec(ua);

                    if (!!matches) {
                        for (p = 0; p < props.length; p++) {
                            match = matches[++k];
                            q = props[p];
                            // check if given property is actually array
                            if (typeof q === OBJ_TYPE && q.length > 0) {
                                if (q.length == 2) {
                                    if (typeof q[1] == FUNC_TYPE) {
                                        // assign modified match
                                        this[q[0]] = q[1].call(this, match);
                                    } else {
                                        // assign given value, ignore regex match
                                        this[q[0]] = q[1];
                                    }
                                } else if (q.length == 3) {
                                    // check whether function or regex
                                    if (typeof q[1] === FUNC_TYPE && !(q[1].exec && q[1].test)) {
                                        // call function (usually string mapper)
                                        this[q[0]] = match ? q[1].call(this, match, q[2]) : undefined;
                                    } else {
                                        // sanitize match using given regex
                                        this[q[0]] = match ? match.replace(q[1], q[2]) : undefined;
                                    }
                                } else if (q.length == 4) {
                                        this[q[0]] = match ? q[3].call(this, match.replace(q[1], q[2])) : undefined;
                                }
                            } else {
                                this[q] = match ? match : undefined;
                            }
                        }
                    }
                }
                i += 2;
            }
        },

        str : function (str, map) {

            for (var i in map) {
                // check if array
                if (typeof map[i] === OBJ_TYPE && map[i].length > 0) {
                    for (var j = 0; j < map[i].length; j++) {
                        if (util.has(map[i][j], str)) {
                            return (i === UNKNOWN) ? undefined : i;
                        }
                    }
                } else if (util.has(map[i], str)) {
                    return (i === UNKNOWN) ? undefined : i;
                }
            }
            return str;
        }
    };


    ///////////////
    // String map
    //////////////


    var maps = {

        browser : {
            oldsafari : {
                version : {
                    '1.0'   : '/8',
                    '1.2'   : '/1',
                    '1.3'   : '/3',
                    '2.0'   : '/412',
                    '2.0.2' : '/416',
                    '2.0.3' : '/417',
                    '2.0.4' : '/419',
                    '?'     : '/'
                }
            }
        },

        device : {
            amazon : {
                model : {
                    'Fire Phone' : ['SD', 'KF']
                }
            },
            sprint : {
                model : {
                    'Evo Shift 4G' : '7373KT'
                },
                vendor : {
                    'HTC'       : 'APA',
                    'Sprint'    : 'Sprint'
                }
            }
        },

        os : {
            windows : {
                version : {
                    'ME'        : '4.90',
                    'NT 3.11'   : 'NT3.51',
                    'NT 4.0'    : 'NT4.0',
                    '2000'      : 'NT 5.0',
                    'XP'        : ['NT 5.1', 'NT 5.2'],
                    'Vista'     : 'NT 6.0',
                    '7'         : 'NT 6.1',
                    '8'         : 'NT 6.2',
                    '8.1'       : 'NT 6.3',
                    '10'        : ['NT 6.4', 'NT 10.0'],
                    'RT'        : 'ARM'
                }
            }
        }
    };


    //////////////
    // Regex map
    /////////////


    var regexes = {

        browser : [[

            // Presto based
            /(opera\smini)\/([\w\.-]+)/i,                                       // Opera Mini
            /(opera\s[mobiletab]+).+version\/([\w\.-]+)/i,                      // Opera Mobi/Tablet
            /(opera).+version\/([\w\.]+)/i,                                     // Opera > 9.80
            /(opera)[\/\s]+([\w\.]+)/i                                          // Opera < 9.80
            ], [NAME, VERSION], [

            /(opios)[\/\s]+([\w\.]+)/i                                          // Opera mini on iphone >= 8.0
            ], [[NAME, 'Opera Mini'], VERSION], [

            /\s(opr)\/([\w\.]+)/i                                               // Opera Webkit
            ], [[NAME, 'Opera'], VERSION], [

            // Mixed
            /(kindle)\/([\w\.]+)/i,                                             // Kindle
            /(lunascape|maxthon|netfront|jasmine|blazer)[\/\s]?([\w\.]*)/i,
                                                                                // Lunascape/Maxthon/Netfront/Jasmine/Blazer
            // Trident based
            /(avant\s|iemobile|slim)(?:browser)?[\/\s]?([\w\.]*)/i,
                                                                                // Avant/IEMobile/SlimBrowser
            /(bidubrowser|baidubrowser)[\/\s]?([\w\.]+)/i,                      // Baidu Browser
            /(?:ms|\()(ie)\s([\w\.]+)/i,                                        // Internet Explorer

            // Webkit/KHTML based
            /(rekonq)\/([\w\.]*)/i,                                             // Rekonq
            /(chromium|flock|rockmelt|midori|epiphany|silk|skyfire|ovibrowser|bolt|iron|vivaldi|iridium|phantomjs|bowser|quark|qupzilla|falkon)\/([\w\.-]+)/i
                                                                                // Chromium/Flock/RockMelt/Midori/Epiphany/Silk/Skyfire/Bolt/Iron/Iridium/PhantomJS/Bowser/QupZilla/Falkon
            ], [NAME, VERSION], [

            /(konqueror)\/([\w\.]+)/i                                           // Konqueror
            ], [[NAME, 'Konqueror'], VERSION], [

            /(trident).+rv[:\s]([\w\.]+).+like\sgecko/i                         // IE11
            ], [[NAME, 'IE'], VERSION], [

            /(edge|edgios|edga|edg)\/((\d+)?[\w\.]+)/i                          // Microsoft Edge
            ], [[NAME, 'Edge'], VERSION], [

            /(yabrowser)\/([\w\.]+)/i                                           // Yandex
            ], [[NAME, 'Yandex'], VERSION], [

            /(Avast)\/([\w\.]+)/i                                               // Avast Secure Browser
            ], [[NAME, 'Avast Secure Browser'], VERSION], [

            /(AVG)\/([\w\.]+)/i                                                 // AVG Secure Browser
            ], [[NAME, 'AVG Secure Browser'], VERSION], [

            /(puffin)\/([\w\.]+)/i                                              // Puffin
            ], [[NAME, 'Puffin'], VERSION], [

            /(focus)\/([\w\.]+)/i                                               // Firefox Focus
            ], [[NAME, 'Firefox Focus'], VERSION], [

            /(opt)\/([\w\.]+)/i                                                 // Opera Touch
            ], [[NAME, 'Opera Touch'], VERSION], [

            /((?:[\s\/])uc?\s?browser|(?:juc.+)ucweb)[\/\s]?([\w\.]+)/i         // UCBrowser
            ], [[NAME, 'UCBrowser'], VERSION], [

            /(comodo_dragon)\/([\w\.]+)/i                                       // Comodo Dragon
            ], [[NAME, /_/g, ' '], VERSION], [

            /(windowswechat qbcore)\/([\w\.]+)/i                                // WeChat Desktop for Windows Built-in Browser
            ], [[NAME, 'WeChat(Win) Desktop'], VERSION], [

            /(micromessenger)\/([\w\.]+)/i                                      // WeChat
            ], [[NAME, 'WeChat'], VERSION], [

            /(brave)\/([\w\.]+)/i                                               // Brave browser
            ], [[NAME, 'Brave'], VERSION], [

            /(qqbrowserlite)\/([\w\.]+)/i                                       // QQBrowserLite
            ], [NAME, VERSION], [

            /(QQ)\/([\d\.]+)/i                                                  // QQ, aka ShouQ
            ], [NAME, VERSION], [

            /m?(qqbrowser)[\/\s]?([\w\.]+)/i                                    // QQBrowser
            ], [NAME, VERSION], [

            /(baiduboxapp)[\/\s]?([\w\.]+)/i                                    // Baidu App
            ], [NAME, VERSION], [

            /(2345Explorer)[\/\s]?([\w\.]+)/i                                   // 2345 Browser
            ], [NAME, VERSION], [

            /(MetaSr)[\/\s]?([\w\.]+)/i                                         // SouGouBrowser
            ], [NAME], [

            /(LBBROWSER)/i                                                      // LieBao Browser
            ], [NAME], [

            /xiaomi\/miuibrowser\/([\w\.]+)/i                                   // MIUI Browser
            ], [VERSION, [NAME, 'MIUI Browser']], [

            /;fbav\/([\w\.]+);/i                                                // Facebook App for iOS & Android
            ], [VERSION, [NAME, 'Facebook']], [

            /safari\s(line)\/([\w\.]+)/i,                                       // Line App for iOS
            /android.+(line)\/([\w\.]+)\/iab/i                                  // Line App for Android
            ], [NAME, VERSION], [

            /headlesschrome(?:\/([\w\.]+)|\s)/i                                 // Chrome Headless
            ], [VERSION, [NAME, 'Chrome Headless']], [

            /\swv\).+(chrome)\/([\w\.]+)/i                                      // Chrome WebView
            ], [[NAME, /(.+)/, '$1 WebView'], VERSION], [

            /((?:oculus|samsung)browser)\/([\w\.]+)/i
            ], [[NAME, /(.+(?:g|us))(.+)/, '$1 $2'], VERSION], [                // Oculus / Samsung Browser

            /android.+version\/([\w\.]+)\s+(?:mobile\s?safari|safari)*/i        // Android Browser
            ], [VERSION, [NAME, 'Android Browser']], [

            /(sailfishbrowser)\/([\w\.]+)/i                                     // Sailfish Browser
            ], [[NAME, 'Sailfish Browser'], VERSION], [

            /(chrome|omniweb|arora|[tizenoka]{5}\s?browser)\/v?([\w\.]+)/i
                                                                                // Chrome/OmniWeb/Arora/Tizen/Nokia
            ], [NAME, VERSION], [

            /(dolfin)\/([\w\.]+)/i                                              // Dolphin
            ], [[NAME, 'Dolphin'], VERSION], [

            /(qihu|qhbrowser|qihoobrowser|360browser)/i                         // 360
            ], [[NAME, '360 Browser']], [

            /((?:android.+)crmo|crios)\/([\w\.]+)/i                             // Chrome for Android/iOS
            ], [[NAME, 'Chrome'], VERSION], [

            /(coast)\/([\w\.]+)/i                                               // Opera Coast
            ], [[NAME, 'Opera Coast'], VERSION], [

            /fxios\/([\w\.-]+)/i                                                // Firefox for iOS
            ], [VERSION, [NAME, 'Firefox']], [

            /version\/([\w\.]+).+?mobile\/\w+\s(safari)/i                       // Mobile Safari
            ], [VERSION, [NAME, 'Mobile Safari']], [

            /version\/([\w\.]+).+?(mobile\s?safari|safari)/i                    // Safari & Safari Mobile
            ], [VERSION, NAME], [

            /webkit.+?(gsa)\/([\w\.]+).+?(mobile\s?safari|safari)(\/[\w\.]+)/i  // Google Search Appliance on iOS
            ], [[NAME, 'GSA'], VERSION], [

            /webkit.+?(mobile\s?safari|safari)(\/[\w\.]+)/i                     // Safari < 3.0
            ], [NAME, [VERSION, mapper.str, maps.browser.oldsafari.version]], [

            /(webkit|khtml)\/([\w\.]+)/i
            ], [NAME, VERSION], [

            // Gecko based
            /(navigator|netscape)\/([\w\.-]+)/i                                 // Netscape
            ], [[NAME, 'Netscape'], VERSION], [
            /(swiftfox)/i,                                                      // Swiftfox
            /(icedragon|iceweasel|camino|chimera|fennec|maemo\sbrowser|minimo|conkeror)[\/\s]?([\w\.\+]+)/i,
                                                                                // IceDragon/Iceweasel/Camino/Chimera/Fennec/Maemo/Minimo/Conkeror
            /(firefox|seamonkey|k-meleon|icecat|iceape|firebird|phoenix|palemoon|basilisk|waterfox)\/([\w\.-]+)$/i,

                                                                                // Firefox/SeaMonkey/K-Meleon/IceCat/IceApe/Firebird/Phoenix
            /(mozilla)\/([\w\.]+).+rv\:.+gecko\/\d+/i,                          // Mozilla

            // Other
            /(polaris|lynx|dillo|icab|doris|amaya|w3m|netsurf|sleipnir)[\/\s]?([\w\.]+)/i,
                                                                                // Polaris/Lynx/Dillo/iCab/Doris/Amaya/w3m/NetSurf/Sleipnir
            /(links)\s\(([\w\.]+)/i,                                            // Links
            /(gobrowser)\/?([\w\.]*)/i,                                         // GoBrowser
            /(ice\s?browser)\/v?([\w\._]+)/i,                                   // ICE Browser
            /(mosaic)[\/\s]([\w\.]+)/i                                          // Mosaic
            ], [NAME, VERSION]
        ],

        cpu : [[

            /(?:(amd|x(?:(?:86|64)[_-])?|wow|win)64)[;\)]/i                     // AMD64
            ], [[ARCHITECTURE, 'amd64']], [

            /(ia32(?=;))/i                                                      // IA32 (quicktime)
            ], [[ARCHITECTURE, util.lowerize]], [

            /((?:i[346]|x)86)[;\)]/i                                            // IA32
            ], [[ARCHITECTURE, 'ia32']], [

            // PocketPC mistakenly identified as PowerPC
            /windows\s(ce|mobile);\sppc;/i
            ], [[ARCHITECTURE, 'arm']], [

            /((?:ppc|powerpc)(?:64)?)(?:\smac|;|\))/i                           // PowerPC
            ], [[ARCHITECTURE, /ower/, '', util.lowerize]], [

            /(sun4\w)[;\)]/i                                                    // SPARC
            ], [[ARCHITECTURE, 'sparc']], [

            /((?:avr32|ia64(?=;))|68k(?=\))|arm(?:64|(?=v\d+[;l]))|(?=atmel\s)avr|(?:irix|mips|sparc)(?:64)?(?=;)|pa-risc)/i
                                                                                // IA64, 68K, ARM/64, AVR/32, IRIX/64, MIPS/64, SPARC/64, PA-RISC
            ], [[ARCHITECTURE, util.lowerize]]
        ],

        device : [[

            /\((ipad|playbook);[\w\s\),;-]+(rim|apple)/i                        // iPad/PlayBook
            ], [MODEL, VENDOR, [TYPE, TABLET]], [

            /applecoremedia\/[\w\.]+ \((ipad)/                                  // iPad
            ], [MODEL, [VENDOR, 'Apple'], [TYPE, TABLET]], [

            /(apple\s{0,1}tv)/i                                                 // Apple TV
            ], [[MODEL, 'Apple TV'], [VENDOR, 'Apple'], [TYPE, SMARTTV]], [

            /(archos)\s(gamepad2?)/i,                                           // Archos
            /(hp).+(touchpad)/i,                                                // HP TouchPad
            /(hp).+(tablet)/i,                                                  // HP Tablet
            /(kindle)\/([\w\.]+)/i,                                             // Kindle
            /\s(nook)[\w\s]+build\/(\w+)/i,                                     // Nook
            /(dell)\s(strea[kpr\s\d]*[\dko])/i                                  // Dell Streak
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /(kf[A-z]+)\sbuild\/.+silk\//i                                      // Kindle Fire HD
            ], [MODEL, [VENDOR, 'Amazon'], [TYPE, TABLET]], [
            /(sd|kf)[0349hijorstuw]+\sbuild\/.+silk\//i                         // Fire Phone
            ], [[MODEL, mapper.str, maps.device.amazon.model], [VENDOR, 'Amazon'], [TYPE, MOBILE]], [
            /android.+aft([bms])\sbuild/i                                       // Fire TV
            ], [MODEL, [VENDOR, 'Amazon'], [TYPE, SMARTTV]], [

            /\((ip[honed|\s\w*]+);.+(apple)/i                                   // iPod/iPhone
            ], [MODEL, VENDOR, [TYPE, MOBILE]], [
            /\((ip[honed|\s\w*]+);/i                                            // iPod/iPhone
            ], [MODEL, [VENDOR, 'Apple'], [TYPE, MOBILE]], [

            /(blackberry)[\s-]?(\w+)/i,                                         // BlackBerry
            /(blackberry|benq|palm(?=\-)|sonyericsson|acer|asus|dell|meizu|motorola|polytron)[\s_-]?([\w-]*)/i,
                                                                                // BenQ/Palm/Sony-Ericsson/Acer/Asus/Dell/Meizu/Motorola/Polytron
            /(hp)\s([\w\s]+\w)/i,                                               // HP iPAQ
            /(asus)-?(\w+)/i                                                    // Asus
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [
            /\(bb10;\s(\w+)/i                                                   // BlackBerry 10
            ], [MODEL, [VENDOR, 'BlackBerry'], [TYPE, MOBILE]], [
                                                                                // Asus Tablets
            /android.+(transfo[prime\s]{4,10}\s\w+|eeepc|slider\s\w+|nexus 7|padfone|p00c)/i
            ], [MODEL, [VENDOR, 'Asus'], [TYPE, TABLET]], [

            /(sony)\s(tablet\s[ps])\sbuild\//i,                                  // Sony
            /(sony)?(?:sgp.+)\sbuild\//i
            ], [[VENDOR, 'Sony'], [MODEL, 'Xperia Tablet'], [TYPE, TABLET]], [
            /android.+\s([c-g]\d{4}|so[-l]\w+)(?=\sbuild\/|\).+chrome\/(?![1-6]{0,1}\d\.))/i
            ], [MODEL, [VENDOR, 'Sony'], [TYPE, MOBILE]], [

            /\s(ouya)\s/i,                                                      // Ouya
            /(nintendo)\s([wids3u]+)/i                                          // Nintendo
            ], [VENDOR, MODEL, [TYPE, CONSOLE]], [

            /android.+;\s(shield)\sbuild/i                                      // Nvidia
            ], [MODEL, [VENDOR, 'Nvidia'], [TYPE, CONSOLE]], [

            /(playstation\s[34portablevi]+)/i                                   // Playstation
            ], [MODEL, [VENDOR, 'Sony'], [TYPE, CONSOLE]], [

            /(sprint\s(\w+))/i                                                  // Sprint Phones
            ], [[VENDOR, mapper.str, maps.device.sprint.vendor], [MODEL, mapper.str, maps.device.sprint.model], [TYPE, MOBILE]], [

            /(htc)[;_\s-]+([\w\s]+(?=\)|\sbuild)|\w+)/i,                        // HTC
            /(zte)-(\w*)/i,                                                     // ZTE
            /(alcatel|geeksphone|nexian|panasonic|(?=;\s)sony)[_\s-]?([\w-]*)/i
                                                                                // Alcatel/GeeksPhone/Nexian/Panasonic/Sony
            ], [VENDOR, [MODEL, /_/g, ' '], [TYPE, MOBILE]], [

            /(nexus\s9)/i                                                       // HTC Nexus 9
            ], [MODEL, [VENDOR, 'HTC'], [TYPE, TABLET]], [

            /d\/huawei([\w\s-]+)[;\)]/i,
            /(nexus\s6p|vog-l29|ane-lx1|eml-l29)/i                              // Huawei
            ], [MODEL, [VENDOR, 'Huawei'], [TYPE, MOBILE]], [

            /android.+(bah2?-a?[lw]\d{2})/i                                     // Huawei MediaPad
            ], [MODEL, [VENDOR, 'Huawei'], [TYPE, TABLET]], [

            /(microsoft);\s(lumia[\s\w]+)/i                                     // Microsoft Lumia
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [

            /[\s\(;](xbox(?:\sone)?)[\s\);]/i                                   // Microsoft Xbox
            ], [MODEL, [VENDOR, 'Microsoft'], [TYPE, CONSOLE]], [
            /(kin\.[onetw]{3})/i                                                // Microsoft Kin
            ], [[MODEL, /\./g, ' '], [VENDOR, 'Microsoft'], [TYPE, MOBILE]], [

                                                                                // Motorola
            /\s(milestone|droid(?:[2-4x]|\s(?:bionic|x2|pro|razr))?:?(\s4g)?)[\w\s]+build\//i,
            /mot[\s-]?(\w*)/i,
            /(XT\d{3,4}) build\//i,
            /(nexus\s6)/i
            ], [MODEL, [VENDOR, 'Motorola'], [TYPE, MOBILE]], [
            /android.+\s(mz60\d|xoom[\s2]{0,2})\sbuild\//i
            ], [MODEL, [VENDOR, 'Motorola'], [TYPE, TABLET]], [

            /hbbtv\/\d+\.\d+\.\d+\s+\([\w\s]*;\s*(\w[^;]*);([^;]*)/i            // HbbTV devices
            ], [[VENDOR, util.trim], [MODEL, util.trim], [TYPE, SMARTTV]], [

            /hbbtv.+maple;(\d+)/i
            ], [[MODEL, /^/, 'SmartTV'], [VENDOR, 'Samsung'], [TYPE, SMARTTV]], [

            /\(dtv[\);].+(aquos)/i                                              // Sharp
            ], [MODEL, [VENDOR, 'Sharp'], [TYPE, SMARTTV]], [

            /android.+((sch-i[89]0\d|shw-m380s|gt-p\d{4}|gt-n\d+|sgh-t8[56]9|nexus 10))/i,
            /((SM-T\w+))/i
            ], [[VENDOR, 'Samsung'], MODEL, [TYPE, TABLET]], [                  // Samsung
            /smart-tv.+(samsung)/i
            ], [VENDOR, [TYPE, SMARTTV], MODEL], [
            /((s[cgp]h-\w+|gt-\w+|galaxy\snexus|sm-\w[\w\d]+))/i,
            /(sam[sung]*)[\s-]*(\w+-?[\w-]*)/i,
            /sec-((sgh\w+))/i
            ], [[VENDOR, 'Samsung'], MODEL, [TYPE, MOBILE]], [

            /sie-(\w*)/i                                                        // Siemens
            ], [MODEL, [VENDOR, 'Siemens'], [TYPE, MOBILE]], [

            /(maemo|nokia).*(n900|lumia\s\d+)/i,                                // Nokia
            /(nokia)[\s_-]?([\w-]*)/i
            ], [[VENDOR, 'Nokia'], MODEL, [TYPE, MOBILE]], [

            /android[x\d\.\s;]+\s([ab][1-7]\-?[0178a]\d\d?)/i                   // Acer
            ], [MODEL, [VENDOR, 'Acer'], [TYPE, TABLET]], [

            /android.+([vl]k\-?\d{3})\s+build/i                                 // LG Tablet
            ], [MODEL, [VENDOR, 'LG'], [TYPE, TABLET]], [
            /android\s3\.[\s\w;-]{10}(lg?)-([06cv9]{3,4})/i                     // LG Tablet
            ], [[VENDOR, 'LG'], MODEL, [TYPE, TABLET]], [
            /(lg) netcast\.tv/i                                                 // LG SmartTV
            ], [VENDOR, MODEL, [TYPE, SMARTTV]], [
            /(nexus\s[45])/i,                                                   // LG
            /lg[e;\s\/-]+(\w*)/i,
            /android.+lg(\-?[\d\w]+)\s+build/i
            ], [MODEL, [VENDOR, 'LG'], [TYPE, MOBILE]], [

            /(lenovo)\s?(s(?:5000|6000)(?:[\w-]+)|tab(?:[\s\w]+))/i             // Lenovo tablets
            ], [VENDOR, MODEL, [TYPE, TABLET]], [
            /android.+(ideatab[a-z0-9\-\s]+)/i                                  // Lenovo
            ], [MODEL, [VENDOR, 'Lenovo'], [TYPE, TABLET]], [
            /(lenovo)[_\s-]?([\w-]+)/i
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [

            /linux;.+((jolla));/i                                               // Jolla
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [

            /((pebble))app\/[\d\.]+\s/i                                         // Pebble
            ], [VENDOR, MODEL, [TYPE, WEARABLE]], [

            /android.+;\s(oppo)\s?([\w\s]+)\sbuild/i                            // OPPO
            ], [VENDOR, MODEL, [TYPE, MOBILE]], [

            /crkey/i                                                            // Google Chromecast
            ], [[MODEL, 'Chromecast'], [VENDOR, 'Google'], [TYPE, SMARTTV]], [

            /android.+;\s(glass)\s\d/i                                          // Google Glass
            ], [MODEL, [VENDOR, 'Google'], [TYPE, WEARABLE]], [

            /android.+;\s(pixel c)[\s)]/i                                       // Google Pixel C
            ], [MODEL, [VENDOR, 'Google'], [TYPE, TABLET]], [

            /android.+;\s(pixel( [23])?( xl)?)[\s)]/i                              // Google Pixel
            ], [MODEL, [VENDOR, 'Google'], [TYPE, MOBILE]], [

            /android.+;\s(\w+)\s+build\/hm\1/i,                                 // Xiaomi Hongmi 'numeric' models
            /android.+(hm[\s\-_]*note?[\s_]*(?:\d\w)?)\s+build/i,               // Xiaomi Hongmi
            /android.+(mi[\s\-_]*(?:a\d|one|one[\s_]plus|note lte)?[\s_]*(?:\d?\w?)[\s_]*(?:plus)?)\s+build/i,    
                                                                                // Xiaomi Mi
            /android.+(redmi[\s\-_]*(?:note)?(?:[\s_]*[\w\s]+))\s+build/i       // Redmi Phones
            ], [[MODEL, /_/g, ' '], [VENDOR, 'Xiaomi'], [TYPE, MOBILE]], [
            /android.+(mi[\s\-_]*(?:pad)(?:[\s_]*[\w\s]+))\s+build/i            // Mi Pad tablets
            ],[[MODEL, /_/g, ' '], [VENDOR, 'Xiaomi'], [TYPE, TABLET]], [
            /android.+;\s(m[1-5]\snote)\sbuild/i                                // Meizu
            ], [MODEL, [VENDOR, 'Meizu'], [TYPE, MOBILE]], [
            /(mz)-([\w-]{2,})/i
            ], [[VENDOR, 'Meizu'], MODEL, [TYPE, MOBILE]], [

            /android.+a000(1)\s+build/i,                                        // OnePlus
            /android.+oneplus\s(a\d{4})[\s)]/i
            ], [MODEL, [VENDOR, 'OnePlus'], [TYPE, MOBILE]], [

            /android.+[;\/]\s*(RCT[\d\w]+)\s+build/i                            // RCA Tablets
            ], [MODEL, [VENDOR, 'RCA'], [TYPE, TABLET]], [

            /android.+[;\/\s]+(Venue[\d\s]{2,7})\s+build/i                      // Dell Venue Tablets
            ], [MODEL, [VENDOR, 'Dell'], [TYPE, TABLET]], [

            /android.+[;\/]\s*(Q[T|M][\d\w]+)\s+build/i                         // Verizon Tablet
            ], [MODEL, [VENDOR, 'Verizon'], [TYPE, TABLET]], [

            /android.+[;\/]\s+(Barnes[&\s]+Noble\s+|BN[RT])(V?.*)\s+build/i     // Barnes & Noble Tablet
            ], [[VENDOR, 'Barnes & Noble'], MODEL, [TYPE, TABLET]], [

            /android.+[;\/]\s+(TM\d{3}.*\b)\s+build/i                           // Barnes & Noble Tablet
            ], [MODEL, [VENDOR, 'NuVision'], [TYPE, TABLET]], [

            /android.+;\s(k88)\sbuild/i                                         // ZTE K Series Tablet
            ], [MODEL, [VENDOR, 'ZTE'], [TYPE, TABLET]], [

            /android.+[;\/]\s*(gen\d{3})\s+build.*49h/i                         // Swiss GEN Mobile
            ], [MODEL, [VENDOR, 'Swiss'], [TYPE, MOBILE]], [

            /android.+[;\/]\s*(zur\d{3})\s+build/i                              // Swiss ZUR Tablet
            ], [MODEL, [VENDOR, 'Swiss'], [TYPE, TABLET]], [

            /android.+[;\/]\s*((Zeki)?TB.*\b)\s+build/i                         // Zeki Tablets
            ], [MODEL, [VENDOR, 'Zeki'], [TYPE, TABLET]], [

            /(android).+[;\/]\s+([YR]\d{2})\s+build/i,
            /android.+[;\/]\s+(Dragon[\-\s]+Touch\s+|DT)(\w{5})\sbuild/i        // Dragon Touch Tablet
            ], [[VENDOR, 'Dragon Touch'], MODEL, [TYPE, TABLET]], [

            /android.+[;\/]\s*(NS-?\w{0,9})\sbuild/i                            // Insignia Tablets
            ], [MODEL, [VENDOR, 'Insignia'], [TYPE, TABLET]], [

            /android.+[;\/]\s*((NX|Next)-?\w{0,9})\s+build/i                    // NextBook Tablets
            ], [MODEL, [VENDOR, 'NextBook'], [TYPE, TABLET]], [

            /android.+[;\/]\s*(Xtreme\_)?(V(1[045]|2[015]|30|40|60|7[05]|90))\s+build/i
            ], [[VENDOR, 'Voice'], MODEL, [TYPE, MOBILE]], [                    // Voice Xtreme Phones

            /android.+[;\/]\s*(LVTEL\-)?(V1[12])\s+build/i                     // LvTel Phones
            ], [[VENDOR, 'LvTel'], MODEL, [TYPE, MOBILE]], [

            /android.+;\s(PH-1)\s/i
            ], [MODEL, [VENDOR, 'Essential'], [TYPE, MOBILE]], [                // Essential PH-1

            /android.+[;\/]\s*(V(100MD|700NA|7011|917G).*\b)\s+build/i          // Envizen Tablets
            ], [MODEL, [VENDOR, 'Envizen'], [TYPE, TABLET]], [

            /android.+[;\/]\s*(Le[\s\-]+Pan)[\s\-]+(\w{1,9})\s+build/i          // Le Pan Tablets
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /android.+[;\/]\s*(Trio[\s\-]*.*)\s+build/i                         // MachSpeed Tablets
            ], [MODEL, [VENDOR, 'MachSpeed'], [TYPE, TABLET]], [

            /android.+[;\/]\s*(Trinity)[\-\s]*(T\d{3})\s+build/i                // Trinity Tablets
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /android.+[;\/]\s*TU_(1491)\s+build/i                               // Rotor Tablets
            ], [MODEL, [VENDOR, 'Rotor'], [TYPE, TABLET]], [

            /android.+(KS(.+))\s+build/i                                        // Amazon Kindle Tablets
            ], [MODEL, [VENDOR, 'Amazon'], [TYPE, TABLET]], [

            /android.+(Gigaset)[\s\-]+(Q\w{1,9})\s+build/i                      // Gigaset Tablets
            ], [VENDOR, MODEL, [TYPE, TABLET]], [

            /\s(tablet|tab)[;\/]/i,                                             // Unidentifiable Tablet
            /\s(mobile)(?:[;\/]|\ssafari)/i                                     // Unidentifiable Mobile
            ], [[TYPE, util.lowerize], VENDOR, MODEL], [

            /[\s\/\(](smart-?tv)[;\)]/i                                         // SmartTV
            ], [[TYPE, SMARTTV]], [

            /(android[\w\.\s\-]{0,9});.+build/i                                 // Generic Android Device
            ], [MODEL, [VENDOR, 'Generic']]
        ],

        engine : [[

            /windows.+\sedge\/([\w\.]+)/i                                       // EdgeHTML
            ], [VERSION, [NAME, 'EdgeHTML']], [

            /webkit\/537\.36.+chrome\/(?!27)([\w\.]+)/i                         // Blink
            ], [VERSION, [NAME, 'Blink']], [

            /(presto)\/([\w\.]+)/i,                                             // Presto
            /(webkit|trident|netfront|netsurf|amaya|lynx|w3m|goanna)\/([\w\.]+)/i,     
                                                                                // WebKit/Trident/NetFront/NetSurf/Amaya/Lynx/w3m/Goanna
            /(khtml|tasman|links)[\/\s]\(?([\w\.]+)/i,                          // KHTML/Tasman/Links
            /(icab)[\/\s]([23]\.[\d\.]+)/i                                      // iCab
            ], [NAME, VERSION], [

            /rv\:([\w\.]{1,9}).+(gecko)/i                                       // Gecko
            ], [VERSION, NAME]
        ],

        os : [[

            // Windows based
            /microsoft\s(windows)\s(vista|xp)/i                                 // Windows (iTunes)
            ], [NAME, VERSION], [
            /(windows)\snt\s6\.2;\s(arm)/i,                                     // Windows RT
            /(windows\sphone(?:\sos)*)[\s\/]?([\d\.\s\w]*)/i,                   // Windows Phone
            /(windows\smobile|windows)[\s\/]?([ntce\d\.\s]+\w)/i
            ], [NAME, [VERSION, mapper.str, maps.os.windows.version]], [
            /(win(?=3|9|n)|win\s9x\s)([nt\d\.]+)/i
            ], [[NAME, 'Windows'], [VERSION, mapper.str, maps.os.windows.version]], [

            // Mobile/Embedded OS
            /\((bb)(10);/i                                                      // BlackBerry 10
            ], [[NAME, 'BlackBerry'], VERSION], [
            /(blackberry)\w*\/?([\w\.]*)/i,                                     // Blackberry
            /(tizen|kaios)[\/\s]([\w\.]+)/i,                                    // Tizen/KaiOS
            /(android|webos|palm\sos|qnx|bada|rim\stablet\sos|meego|sailfish|contiki)[\/\s-]?([\w\.]*)/i
                                                                                // Android/WebOS/Palm/QNX/Bada/RIM/MeeGo/Contiki/Sailfish OS
            ], [NAME, VERSION], [
            /(symbian\s?os|symbos|s60(?=;))[\/\s-]?([\w\.]*)/i                  // Symbian
            ], [[NAME, 'Symbian'], VERSION], [
            /\((series40);/i                                                    // Series 40
            ], [NAME], [
            /mozilla.+\(mobile;.+gecko.+firefox/i                               // Firefox OS
            ], [[NAME, 'Firefox OS'], VERSION], [

            // Console
            /(nintendo|playstation)\s([wids34portablevu]+)/i,                   // Nintendo/Playstation

            // GNU/Linux based
            /(mint)[\/\s\(]?(\w*)/i,                                            // Mint
            /(mageia|vectorlinux)[;\s]/i,                                       // Mageia/VectorLinux
            /(joli|[kxln]?ubuntu|debian|suse|opensuse|gentoo|(?=\s)arch|slackware|fedora|mandriva|centos|pclinuxos|redhat|zenwalk|linpus)[\/\s-]?(?!chrom)([\w\.-]*)/i,
                                                                                // Joli/Ubuntu/Debian/SUSE/Gentoo/Arch/Slackware
                                                                                // Fedora/Mandriva/CentOS/PCLinuxOS/RedHat/Zenwalk/Linpus
            /(hurd|linux)\s?([\w\.]*)/i,                                        // Hurd/Linux
            /(gnu)\s?([\w\.]*)/i                                                // GNU
            ], [NAME, VERSION], [

            /(cros)\s[\w]+\s([\w\.]+\w)/i                                       // Chromium OS
            ], [[NAME, 'Chromium OS'], VERSION],[

            // Solaris
            /(sunos)\s?([\w\.\d]*)/i                                            // Solaris
            ], [[NAME, 'Solaris'], VERSION], [

            // BSD based
            /\s([frentopc-]{0,4}bsd|dragonfly)\s?([\w\.]*)/i                    // FreeBSD/NetBSD/OpenBSD/PC-BSD/DragonFly
            ], [NAME, VERSION],[

            /(haiku)\s(\w+)/i                                                   // Haiku
            ], [NAME, VERSION],[

            /cfnetwork\/.+darwin/i,
            /ip[honead]{2,4}(?:.*os\s([\w]+)\slike\smac|;\sopera)/i             // iOS
            ], [[VERSION, /_/g, '.'], [NAME, 'iOS']], [

            /(mac\sos\sx)\s?([\w\s\.]*)/i,
            /(macintosh|mac(?=_powerpc)\s)/i                                    // Mac OS
            ], [[NAME, 'Mac OS'], [VERSION, /_/g, '.']], [

            // Other
            /((?:open)?solaris)[\/\s-]?([\w\.]*)/i,                             // Solaris
            /(aix)\s((\d)(?=\.|\)|\s)[\w\.])*/i,                                // AIX
            /(plan\s9|minix|beos|os\/2|amigaos|morphos|risc\sos|openvms|fuchsia)/i,
                                                                                // Plan9/Minix/BeOS/OS2/AmigaOS/MorphOS/RISCOS/OpenVMS/Fuchsia
            /(unix)\s?([\w\.]*)/i                                               // UNIX
            ], [NAME, VERSION]
        ]
    };


    /////////////////
    // Constructor
    ////////////////
    var UAParser = function (uastring, extensions) {

        if (typeof uastring === 'object') {
            extensions = uastring;
            uastring = undefined;
        }

        if (!(this instanceof UAParser)) {
            return new UAParser(uastring, extensions).getResult();
        }

        var ua = uastring || ((window && window.navigator && window.navigator.userAgent) ? window.navigator.userAgent : EMPTY);
        var rgxmap = extensions ? util.extend(regexes, extensions) : regexes;

        this.getBrowser = function () {
            var browser = { name: undefined, version: undefined };
            mapper.rgx.call(browser, ua, rgxmap.browser);
            browser.major = util.major(browser.version); // deprecated
            return browser;
        };
        this.getCPU = function () {
            var cpu = { architecture: undefined };
            mapper.rgx.call(cpu, ua, rgxmap.cpu);
            return cpu;
        };
        this.getDevice = function () {
            var device = { vendor: undefined, model: undefined, type: undefined };
            mapper.rgx.call(device, ua, rgxmap.device);
            return device;
        };
        this.getEngine = function () {
            var engine = { name: undefined, version: undefined };
            mapper.rgx.call(engine, ua, rgxmap.engine);
            return engine;
        };
        this.getOS = function () {
            var os = { name: undefined, version: undefined };
            mapper.rgx.call(os, ua, rgxmap.os);
            return os;
        };
        this.getResult = function () {
            return {
                ua      : this.getUA(),
                browser : this.getBrowser(),
                engine  : this.getEngine(),
                os      : this.getOS(),
                device  : this.getDevice(),
                cpu     : this.getCPU()
            };
        };
        this.getUA = function () {
            return ua;
        };
        this.setUA = function (uastring) {
            ua = uastring;
            return this;
        };
        return this;
    };

    UAParser.VERSION = LIBVERSION;
    UAParser.BROWSER = {
        NAME    : NAME,
        MAJOR   : MAJOR, // deprecated
        VERSION : VERSION
    };
    UAParser.CPU = {
        ARCHITECTURE : ARCHITECTURE
    };
    UAParser.DEVICE = {
        MODEL   : MODEL,
        VENDOR  : VENDOR,
        TYPE    : TYPE,
        CONSOLE : CONSOLE,
        MOBILE  : MOBILE,
        SMARTTV : SMARTTV,
        TABLET  : TABLET,
        WEARABLE: WEARABLE,
        EMBEDDED: EMBEDDED
    };
    UAParser.ENGINE = {
        NAME    : NAME,
        VERSION : VERSION
    };
    UAParser.OS = {
        NAME    : NAME,
        VERSION : VERSION
    };

    ///////////
    // Export
    //////////


    // check js environment
    if (typeof(exports) !== UNDEF_TYPE) {
        // nodejs env
        if (typeof module !== UNDEF_TYPE && module.exports) {
            exports = module.exports = UAParser;
        }
        exports.UAParser = UAParser;
    } else {
        // requirejs env (optional)
        if (typeof(define) === 'function' && define.amd) {
            define(function () {
                return UAParser;
            });
        } else if (window) {
            // browser env
            window.UAParser = UAParser;
        }
    }

    // jQuery/Zepto specific (optional)
    // Note:
    //   In AMD env the global scope should be kept clean, but jQuery is an exception.
    //   jQuery always exports to global scope, unless jQuery.noConflict(true) is used,
    //   and we should catch that.
    var $ = window && (window.jQuery || window.Zepto);
    if ($ && !$.ua) {
        var parser = new UAParser();
        $.ua = parser.getResult();
        $.ua.get = function () {
            return parser.getUA();
        };
        $.ua.set = function (uastring) {
            parser.setUA(uastring);
            var result = parser.getResult();
            for (var prop in result) {
                $.ua[prop] = result[prop];
            }
        };
    }

})(typeof window === 'object' ? window : this);

},{}],22:[function(require,module,exports){
/**
 * Convert array of 16 byte values to UUID string format of the form:
 * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
 */
var byteToHex = [];
for (var i = 0; i < 256; ++i) {
  byteToHex[i] = (i + 0x100).toString(16).substr(1);
}

function bytesToUuid(buf, offset) {
  var i = offset || 0;
  var bth = byteToHex;
  // join used to fix memory issue caused by concatenation: https://bugs.chromium.org/p/v8/issues/detail?id=3175#c4
  return ([
    bth[buf[i++]], bth[buf[i++]],
    bth[buf[i++]], bth[buf[i++]], '-',
    bth[buf[i++]], bth[buf[i++]], '-',
    bth[buf[i++]], bth[buf[i++]], '-',
    bth[buf[i++]], bth[buf[i++]], '-',
    bth[buf[i++]], bth[buf[i++]],
    bth[buf[i++]], bth[buf[i++]],
    bth[buf[i++]], bth[buf[i++]]
  ]).join('');
}

module.exports = bytesToUuid;

},{}],23:[function(require,module,exports){
// Unique ID creation requires a high quality random # generator.  In the
// browser this is a little complicated due to unknown quality of Math.random()
// and inconsistent support for the `crypto` API.  We do the best we can via
// feature-detection

// getRandomValues needs to be invoked in a context where "this" is a Crypto
// implementation. Also, find the complete implementation of crypto on IE11.
var getRandomValues = (typeof(crypto) != 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto)) ||
                      (typeof(msCrypto) != 'undefined' && typeof window.msCrypto.getRandomValues == 'function' && msCrypto.getRandomValues.bind(msCrypto));

if (getRandomValues) {
  // WHATWG crypto RNG - http://wiki.whatwg.org/wiki/Crypto
  var rnds8 = new Uint8Array(16); // eslint-disable-line no-undef

  module.exports = function whatwgRNG() {
    getRandomValues(rnds8);
    return rnds8;
  };
} else {
  // Math.random()-based (RNG)
  //
  // If all else fails, use Math.random().  It's fast, but is of unspecified
  // quality.
  var rnds = new Array(16);

  module.exports = function mathRNG() {
    for (var i = 0, r; i < 16; i++) {
      if ((i & 0x03) === 0) r = Math.random() * 0x100000000;
      rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
    }

    return rnds;
  };
}

},{}],24:[function(require,module,exports){
var rng = require('./lib/rng');
var bytesToUuid = require('./lib/bytesToUuid');

function v4(options, buf, offset) {
  var i = buf && offset || 0;

  if (typeof(options) == 'string') {
    buf = options === 'binary' ? new Array(16) : null;
    options = null;
  }
  options = options || {};

  var rnds = options.random || (options.rng || rng)();

  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
  rnds[6] = (rnds[6] & 0x0f) | 0x40;
  rnds[8] = (rnds[8] & 0x3f) | 0x80;

  // Copy bytes to buffer, if provided
  if (buf) {
    for (var ii = 0; ii < 16; ++ii) {
      buf[i + ii] = rnds[ii];
    }
  }

  return buf || bytesToUuid(rnds);
}

module.exports = v4;

},{"./lib/bytesToUuid":22,"./lib/rng":23}],25:[function(require,module,exports){
/*
WildEmitter.js is a slim little event emitter by @henrikjoreteg largely based
on @visionmedia's Emitter from UI Kit.

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

emitter.on('*', function (eventName, other, event, payloads) {

});

emitter.on('somenamespace*', function (eventName, payloads) {

});

Please note that callbacks triggered by wildcard registered events also get
the event name as the first argument.
*/

module.exports = WildEmitter;

function WildEmitter() { }

WildEmitter.mixin = function (constructor) {
    var prototype = constructor.prototype || constructor;

    prototype.isWildEmitter= true;

    // Listen on the given `event` with `fn`. Store a group name if present.
    prototype.on = function (event, groupName, fn) {
        this.callbacks = this.callbacks || {};
        var hasGroup = (arguments.length === 3),
            group = hasGroup ? arguments[1] : undefined,
            func = hasGroup ? arguments[2] : arguments[1];
        func._groupName = group;
        (this.callbacks[event] = this.callbacks[event] || []).push(func);
        return this;
    };

    // Adds an `event` listener that will be invoked a single
    // time then automatically removed.
    prototype.once = function (event, groupName, fn) {
        var self = this,
            hasGroup = (arguments.length === 3),
            group = hasGroup ? arguments[1] : undefined,
            func = hasGroup ? arguments[2] : arguments[1];
        function on() {
            self.off(event, on);
            func.apply(this, arguments);
        }
        this.on(event, group, on);
        return this;
    };

    // Unbinds an entire group
    prototype.releaseGroup = function (groupName) {
        this.callbacks = this.callbacks || {};
        var item, i, len, handlers;
        for (item in this.callbacks) {
            handlers = this.callbacks[item];
            for (i = 0, len = handlers.length; i < len; i++) {
                if (handlers[i]._groupName === groupName) {
                    //console.log('removing');
                    // remove it and shorten the array we're looping through
                    handlers.splice(i, 1);
                    i--;
                    len--;
                }
            }
        }
        return this;
    };

    // Remove the given callback for `event` or all
    // registered callbacks.
    prototype.off = function (event, fn) {
        this.callbacks = this.callbacks || {};
        var callbacks = this.callbacks[event],
            i;

        if (!callbacks) return this;

        // remove all handlers
        if (arguments.length === 1) {
            delete this.callbacks[event];
            return this;
        }

        // remove specific handler
        i = callbacks.indexOf(fn);
        if (i !== -1) {
            callbacks.splice(i, 1);
            if (callbacks.length === 0) {
                delete this.callbacks[event];
            }
        }
        return this;
    };

    /// Emit `event` with the given args.
    // also calls any `*` handlers
    prototype.emit = function (event) {
        this.callbacks = this.callbacks || {};
        var args = [].slice.call(arguments, 1),
            callbacks = this.callbacks[event],
            specialCallbacks = this.getWildcardCallbacks(event),
            i,
            len,
            item,
            listeners;

        if (callbacks) {
            listeners = callbacks.slice();
            for (i = 0, len = listeners.length; i < len; ++i) {
                if (!listeners[i]) {
                    break;
                }
                listeners[i].apply(this, args);
            }
        }

        if (specialCallbacks) {
            len = specialCallbacks.length;
            listeners = specialCallbacks.slice();
            for (i = 0, len = listeners.length; i < len; ++i) {
                if (!listeners[i]) {
                    break;
                }
                listeners[i].apply(this, [event].concat(args));
            }
        }

        return this;
    };

    // Helper for for finding special wildcard event handlers that match the event
    prototype.getWildcardCallbacks = function (eventName) {
        this.callbacks = this.callbacks || {};
        var item,
            split,
            result = [];

        for (item in this.callbacks) {
            split = item.split('*');
            if (item === '*' || (split.length === 2 && eventName.slice(0, split[0].length) === split[0])) {
                result = result.concat(this.callbacks[item]);
            }
        }
        return result;
    };

};

WildEmitter.mixin(WildEmitter);

},{}]},{},[2])(2)
});