nextcloud-spreed/js/simplewebrtc.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.SimpleWebRTC = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
	module.exports = after

	function after(count, callback, err_cb) {
		var bail = false
		err_cb = err_cb || noop
		proxy.count = count

		return (count === 0) ? callback() : proxy

		function proxy(err, result) {
			if (proxy.count <= 0) {
				throw new Error('after called too many times')
			}
			--proxy.count

			// after first error, rest are passed to err_cb
			if (err) {
				bail = true
				callback(err)
				// future error callbacks will go to error handler
				callback = err_cb
			} else if (proxy.count === 0 && !bail) {
				callback(null, result)
			}
		}
	}

	function noop() {}

},{}],2:[function(require,module,exports){
	/**
	 * An abstraction for slicing an arraybuffer even when
	 * ArrayBuffer.prototype.slice is not supported
	 *
	 * @api public
	 */

	module.exports = function(arraybuffer, start, end) {
		var bytes = arraybuffer.byteLength;
		start = start || 0;
		end = end || bytes;

		if (arraybuffer.slice) { return arraybuffer.slice(start, end); }

		if (start < 0) { start += bytes; }
		if (end < 0) { end += bytes; }
		if (end > bytes) { end = bytes; }

		if (start >= bytes || start >= end || bytes === 0) {
			return new ArrayBuffer(0);
		}

		var abv = new Uint8Array(arraybuffer);
		var result = new Uint8Array(end - start);
		for (var i = start, ii = 0; i < end; i++, ii++) {
			result[ii] = abv[i];
		}
		return result.buffer;
	};

},{}],3:[function(require,module,exports){
	var adapter = require('webrtc-adapter');
	module.exports = function (stream, el, options) {
		var item;
		var URL = window.URL;
		var element = el;
		var opts = {
			autoplay: true,
			mirror: false,
			muted: false,
			audio: false,
			disableContextMenu: false
		};

		if (options) {
			for (item in options) {
				opts[item] = options[item];
			}
		}

		if (!element) {
			element = document.createElement(opts.audio ? 'audio' : 'video');
		} else if (element.tagName.toLowerCase() === 'audio') {
			opts.audio = true;
		}

		if (opts.disableContextMenu) {
			element.oncontextmenu = function (e) {
				e.preventDefault();
			};
		}

		if (opts.autoplay) element.autoplay = 'autoplay';
		if (opts.muted) element.muted = true;
		if (!opts.audio && opts.mirror) {
			['', 'moz', 'webkit', 'o', 'ms'].forEach(function (prefix) {
				var styleName = prefix ? prefix + 'Transform' : 'transform';
				element.style[styleName] = 'scaleX(-1)';
			});
		}

		element.srcObject = stream;
		return element;
	};

},{"webrtc-adapter":90}],4:[function(require,module,exports){

	/**
	 * Expose `Backoff`.
	 */

	module.exports = Backoff;

	/**
	 * Initialize backoff timer with `opts`.
	 *
	 * - `min` initial timeout in milliseconds [100]
	 * - `max` max timeout [10000]
	 * - `jitter` [0]
	 * - `factor` [2]
	 *
	 * @param {Object} opts
	 * @api public
	 */

	function Backoff(opts) {
		opts = opts || {};
		this.ms = opts.min || 100;
		this.max = opts.max || 10000;
		this.factor = opts.factor || 2;
		this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
		this.attempts = 0;
	}

	/**
	 * Return the backoff duration.
	 *
	 * @return {Number}
	 * @api public
	 */

	Backoff.prototype.duration = function(){
		var ms = this.ms * Math.pow(this.factor, this.attempts++);
		if (this.jitter) {
			var rand =  Math.random();
			var deviation = Math.floor(rand * this.jitter * ms);
			ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
		}
		return Math.min(ms, this.max) | 0;
	};

	/**
	 * Reset the number of attempts.
	 *
	 * @api public
	 */

	Backoff.prototype.reset = function(){
		this.attempts = 0;
	};

	/**
	 * Set the minimum duration
	 *
	 * @api public
	 */

	Backoff.prototype.setMin = function(min){
		this.ms = min;
	};

	/**
	 * Set the maximum duration
	 *
	 * @api public
	 */

	Backoff.prototype.setMax = function(max){
		this.max = max;
	};

	/**
	 * Set the jitter
	 *
	 * @api public
	 */

	Backoff.prototype.setJitter = function(jitter){
		this.jitter = jitter;
	};


},{}],5:[function(require,module,exports){
	/*
	 * base64-arraybuffer
	 * https://github.com/niklasvh/base64-arraybuffer
	 *
	 * Copyright (c) 2012 Niklas von Hertzen
	 * Licensed under the MIT license.
	 */
	(function(chars){
		"use strict";

		exports.encode = function(arraybuffer) {
			var bytes = new Uint8Array(arraybuffer),
				i, len = bytes.length, base64 = "";

			for (i = 0; i < len; i+=3) {
				base64 += chars[bytes[i] >> 2];
				base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
				base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
				base64 += chars[bytes[i + 2] & 63];
			}

			if ((len % 3) === 2) {
				base64 = base64.substring(0, base64.length - 1) + "=";
			} else if (len % 3 === 1) {
				base64 = base64.substring(0, base64.length - 2) + "==";
			}

			return base64;
		};

		exports.decode =  function(base64) {
			var bufferLength = base64.length * 0.75,
				len = base64.length, i, p = 0,
				encoded1, encoded2, encoded3, encoded4;

			if (base64[base64.length - 1] === "=") {
				bufferLength--;
				if (base64[base64.length - 2] === "=") {
					bufferLength--;
				}
			}

			var arraybuffer = new ArrayBuffer(bufferLength),
				bytes = new Uint8Array(arraybuffer);

			for (i = 0; i < len; i+=4) {
				encoded1 = chars.indexOf(base64[i]);
				encoded2 = chars.indexOf(base64[i+1]);
				encoded3 = chars.indexOf(base64[i+2]);
				encoded4 = chars.indexOf(base64[i+3]);

				bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
				bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
				bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
			}

			return arraybuffer;
		};
	})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");

},{}],6:[function(require,module,exports){
	(function (global){
		/**
		 * Create a blob builder even when vendor prefixes exist
		 */

		var BlobBuilder = global.BlobBuilder
			|| global.WebKitBlobBuilder
			|| global.MSBlobBuilder
			|| global.MozBlobBuilder;

		/**
		 * Check if Blob constructor is supported
		 */

		var blobSupported = (function() {
			try {
				var a = new Blob(['hi']);
				return a.size === 2;
			} catch(e) {
				return false;
			}
		})();

		/**
		 * Check if Blob constructor supports ArrayBufferViews
		 * Fails in Safari 6, so we need to map to ArrayBuffers there.
		 */

		var blobSupportsArrayBufferView = blobSupported && (function() {
				try {
					var b = new Blob([new Uint8Array([1,2])]);
					return b.size === 2;
				} catch(e) {
					return false;
				}
			})();

		/**
		 * Check if BlobBuilder is supported
		 */

		var blobBuilderSupported = BlobBuilder
			&& BlobBuilder.prototype.append
			&& BlobBuilder.prototype.getBlob;

		/**
		 * Helper function that maps ArrayBufferViews to ArrayBuffers
		 * Used by BlobBuilder constructor and old browsers that didn't
		 * support it in the Blob constructor.
		 */

		function mapArrayBufferViews(ary) {
			for (var i = 0; i < ary.length; i++) {
				var chunk = ary[i];
				if (chunk.buffer instanceof ArrayBuffer) {
					var buf = chunk.buffer;

					// if this is a subarray, make a copy so we only
					// include the subarray region from the underlying buffer
					if (chunk.byteLength !== buf.byteLength) {
						var copy = new Uint8Array(chunk.byteLength);
						copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
						buf = copy.buffer;
					}

					ary[i] = buf;
				}
			}
		}

		function BlobBuilderConstructor(ary, options) {
			options = options || {};

			var bb = new BlobBuilder();
			mapArrayBufferViews(ary);

			for (var i = 0; i < ary.length; i++) {
				bb.append(ary[i]);
			}

			return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
		};

		function BlobConstructor(ary, options) {
			mapArrayBufferViews(ary);
			return new Blob(ary, options || {});
		};

		module.exports = (function() {
			if (blobSupported) {
				return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
			} else if (blobBuilderSupported) {
				return BlobBuilderConstructor;
			} else {
				return undefined;
			}
		})();

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],7:[function(require,module,exports){
	/**
	 * Slice reference.
	 */

	var slice = [].slice;

	/**
	 * Bind `obj` to `fn`.
	 *
	 * @param {Object} obj
	 * @param {Function|String} fn or string
	 * @return {Function}
	 * @api public
	 */

	module.exports = function(obj, fn){
		if ('string' == typeof fn) fn = obj[fn];
		if ('function' != typeof fn) throw new Error('bind() requires a function');
		var args = slice.call(arguments, 2);
		return function(){
			return fn.apply(obj, args.concat(slice.call(arguments)));
		}
	};

},{}],8:[function(require,module,exports){

	/**
	 * Expose `Emitter`.
	 */

	module.exports = Emitter;

	/**
	 * Initialize a new `Emitter`.
	 *
	 * @api public
	 */

	function Emitter(obj) {
		if (obj) return mixin(obj);
	};

	/**
	 * Mixin the emitter properties.
	 *
	 * @param {Object} obj
	 * @return {Object}
	 * @api private
	 */

	function mixin(obj) {
		for (var key in Emitter.prototype) {
			obj[key] = Emitter.prototype[key];
		}
		return obj;
	}

	/**
	 * Listen on the given `event` with `fn`.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.on =
		Emitter.prototype.addEventListener = function(event, fn){
			this._callbacks = this._callbacks || {};
			(this._callbacks[event] = this._callbacks[event] || [])
				.push(fn);
			return this;
		};

	/**
	 * Adds an `event` listener that will be invoked a single
	 * time then automatically removed.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.once = function(event, fn){
		var self = this;
		this._callbacks = this._callbacks || {};

		function on() {
			self.off(event, on);
			fn.apply(this, arguments);
		}

		on.fn = fn;
		this.on(event, on);
		return this;
	};

	/**
	 * Remove the given callback for `event` or all
	 * registered callbacks.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.off =
		Emitter.prototype.removeListener =
			Emitter.prototype.removeAllListeners =
				Emitter.prototype.removeEventListener = function(event, fn){
					this._callbacks = this._callbacks || {};

					// all
					if (0 == arguments.length) {
						this._callbacks = {};
						return this;
					}

					// specific event
					var callbacks = this._callbacks[event];
					if (!callbacks) return this;

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

					// remove specific handler
					var cb;
					for (var i = 0; i < callbacks.length; i++) {
						cb = callbacks[i];
						if (cb === fn || cb.fn === fn) {
							callbacks.splice(i, 1);
							break;
						}
					}
					return this;
				};

	/**
	 * Emit `event` with the given args.
	 *
	 * @param {String} event
	 * @param {Mixed} ...
	 * @return {Emitter}
	 */

	Emitter.prototype.emit = function(event){
		this._callbacks = this._callbacks || {};
		var args = [].slice.call(arguments, 1)
			, callbacks = this._callbacks[event];

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

		return this;
	};

	/**
	 * Return array of callbacks for `event`.
	 *
	 * @param {String} event
	 * @return {Array}
	 * @api public
	 */

	Emitter.prototype.listeners = function(event){
		this._callbacks = this._callbacks || {};
		return this._callbacks[event] || [];
	};

	/**
	 * Check if this emitter has `event` handlers.
	 *
	 * @param {String} event
	 * @return {Boolean}
	 * @api public
	 */

	Emitter.prototype.hasListeners = function(event){
		return !! this.listeners(event).length;
	};

},{}],9:[function(require,module,exports){

	module.exports = function(a, b){
		var fn = function(){};
		fn.prototype = b.prototype;
		a.prototype = new fn;
		a.prototype.constructor = a;
	};
},{}],10:[function(require,module,exports){

	module.exports =  require('./lib/');

},{"./lib/":11}],11:[function(require,module,exports){

	module.exports = require('./socket');

	/**
	 * Exports parser
	 *
	 * @api public
	 *
	 */
	module.exports.parser = require('engine.io-parser');

},{"./socket":12,"engine.io-parser":24}],12:[function(require,module,exports){
	(function (global){
		/**
		 * Module dependencies.
		 */

		var transports = require('./transports');
		var Emitter = require('component-emitter');
		var debug = require('debug')('engine.io-client:socket');
		var index = require('indexof');
		var parser = require('engine.io-parser');
		var parseuri = require('parseuri');
		var parsejson = require('parsejson');
		var parseqs = require('parseqs');

		/**
		 * Module exports.
		 */

		module.exports = Socket;

		/**
		 * Noop function.
		 *
		 * @api private
		 */

		function noop(){}

		/**
		 * Socket constructor.
		 *
		 * @param {String|Object} uri or options
		 * @param {Object} options
		 * @api public
		 */

		function Socket(uri, opts){
			if (!(this instanceof Socket)) return new Socket(uri, opts);

			opts = opts || {};

			if (uri && 'object' == typeof uri) {
				opts = uri;
				uri = null;
			}

			if (uri) {
				uri = parseuri(uri);
				opts.host = uri.host;
				opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
				opts.port = uri.port;
				if (uri.query) opts.query = uri.query;
			}

			this.secure = null != opts.secure ? opts.secure :
				(global.location && 'https:' == location.protocol);

			if (opts.host) {
				var pieces = opts.host.split(':');
				opts.hostname = pieces.shift();
				if (pieces.length) {
					opts.port = pieces.pop();
				} else if (!opts.port) {
					// if no port is specified manually, use the protocol default
					opts.port = this.secure ? '443' : '80';
				}
			}

			this.agent = opts.agent || false;
			this.hostname = opts.hostname ||
				(global.location ? location.hostname : 'localhost');
			this.port = opts.port || (global.location && location.port ?
					location.port :
					(this.secure ? 443 : 80));
			this.query = opts.query || {};
			if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
			this.upgrade = false !== opts.upgrade;
			this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
			this.forceJSONP = !!opts.forceJSONP;
			this.jsonp = false !== opts.jsonp;
			this.forceBase64 = !!opts.forceBase64;
			this.enablesXDR = !!opts.enablesXDR;
			this.timestampParam = opts.timestampParam || 't';
			this.timestampRequests = opts.timestampRequests;
			this.transports = opts.transports || ['polling', 'websocket'];
			this.readyState = '';
			this.writeBuffer = [];
			this.callbackBuffer = [];
			this.policyPort = opts.policyPort || 843;
			this.rememberUpgrade = opts.rememberUpgrade || false;
			this.binaryType = null;
			this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;

			// SSL options for Node.js client
			this.pfx = opts.pfx || null;
			this.key = opts.key || null;
			this.passphrase = opts.passphrase || null;
			this.cert = opts.cert || null;
			this.ca = opts.ca || null;
			this.ciphers = opts.ciphers || null;
			this.rejectUnauthorized = opts.rejectUnauthorized || null;

			this.open();
		}

		Socket.priorWebsocketSuccess = false;

		/**
		 * Mix in `Emitter`.
		 */

		Emitter(Socket.prototype);

		/**
		 * Protocol version.
		 *
		 * @api public
		 */

		Socket.protocol = parser.protocol; // this is an int

		/**
		 * Expose deps for legacy compatibility
		 * and standalone browser access.
		 */

		Socket.Socket = Socket;
		Socket.Transport = require('./transport');
		Socket.transports = require('./transports');
		Socket.parser = require('engine.io-parser');

		/**
		 * Creates transport of the given type.
		 *
		 * @param {String} transport name
		 * @return {Transport}
		 * @api private
		 */

		Socket.prototype.createTransport = function (name) {
			debug('creating transport "%s"', name);
			var query = clone(this.query);

			// append engine.io protocol identifier
			query.EIO = parser.protocol;

			// transport name
			query.transport = name;

			// session id if we already have one
			if (this.id) query.sid = this.id;

			var transport = new transports[name]({
				agent: this.agent,
				hostname: this.hostname,
				port: this.port,
				secure: this.secure,
				path: this.path,
				query: query,
				forceJSONP: this.forceJSONP,
				jsonp: this.jsonp,
				forceBase64: this.forceBase64,
				enablesXDR: this.enablesXDR,
				timestampRequests: this.timestampRequests,
				timestampParam: this.timestampParam,
				policyPort: this.policyPort,
				socket: this,
				pfx: this.pfx,
				key: this.key,
				passphrase: this.passphrase,
				cert: this.cert,
				ca: this.ca,
				ciphers: this.ciphers,
				rejectUnauthorized: this.rejectUnauthorized
			});

			return transport;
		};

		function clone (obj) {
			var o = {};
			for (var i in obj) {
				if (obj.hasOwnProperty(i)) {
					o[i] = obj[i];
				}
			}
			return o;
		}

		/**
		 * Initializes transport to use and starts probe.
		 *
		 * @api private
		 */
		Socket.prototype.open = function () {
			var transport;
			if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
				transport = 'websocket';
			} else if (0 == this.transports.length) {
				// Emit error on next tick so it can be listened to
				var self = this;
				setTimeout(function() {
					self.emit('error', 'No transports available');
				}, 0);
				return;
			} else {
				transport = this.transports[0];
			}
			this.readyState = 'opening';

			// Retry with the next transport if the transport is disabled (jsonp: false)
			var transport;
			try {
				transport = this.createTransport(transport);
			} catch (e) {
				this.transports.shift();
				this.open();
				return;
			}

			transport.open();
			this.setTransport(transport);
		};

		/**
		 * Sets the current transport. Disables the existing one (if any).
		 *
		 * @api private
		 */

		Socket.prototype.setTransport = function(transport){
			debug('setting transport %s', transport.name);
			var self = this;

			if (this.transport) {
				debug('clearing existing transport %s', this.transport.name);
				this.transport.removeAllListeners();
			}

			// set up transport
			this.transport = transport;

			// set up transport listeners
			transport
				.on('drain', function(){
					self.onDrain();
				})
				.on('packet', function(packet){
					self.onPacket(packet);
				})
				.on('error', function(e){
					self.onError(e);
				})
				.on('close', function(){
					self.onClose('transport close');
				});
		};

		/**
		 * Probes a transport.
		 *
		 * @param {String} transport name
		 * @api private
		 */

		Socket.prototype.probe = function (name) {
			debug('probing transport "%s"', name);
			var transport = this.createTransport(name, { probe: 1 })
				, failed = false
				, self = this;

			Socket.priorWebsocketSuccess = false;

			function onTransportOpen(){
				if (self.onlyBinaryUpgrades) {
					var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
					failed = failed || upgradeLosesBinary;
				}
				if (failed) return;

				debug('probe transport "%s" opened', name);
				transport.send([{ type: 'ping', data: 'probe' }]);
				transport.once('packet', function (msg) {
					if (failed) return;
					if ('pong' == msg.type && 'probe' == msg.data) {
						debug('probe transport "%s" pong', name);
						self.upgrading = true;
						self.emit('upgrading', transport);
						if (!transport) return;
						Socket.priorWebsocketSuccess = 'websocket' == transport.name;

						debug('pausing current transport "%s"', self.transport.name);
						self.transport.pause(function () {
							if (failed) return;
							if ('closed' == self.readyState) return;
							debug('changing transport and sending upgrade packet');

							cleanup();

							self.setTransport(transport);
							transport.send([{ type: 'upgrade' }]);
							self.emit('upgrade', transport);
							transport = null;
							self.upgrading = false;
							self.flush();
						});
					} else {
						debug('probe transport "%s" failed', name);
						var err = new Error('probe error');
						err.transport = transport.name;
						self.emit('upgradeError', err);
					}
				});
			}

			function freezeTransport() {
				if (failed) return;

				// Any callback called by transport should be ignored since now
				failed = true;

				cleanup();

				transport.close();
				transport = null;
			}

			//Handle any error that happens while probing
			function onerror(err) {
				var error = new Error('probe error: ' + err);
				error.transport = transport.name;

				freezeTransport();

				debug('probe transport "%s" failed because of error: %s', name, err);

				self.emit('upgradeError', error);
			}

			function onTransportClose(){
				onerror("transport closed");
			}

			//When the socket is closed while we're probing
			function onclose(){
				onerror("socket closed");
			}

			//When the socket is upgraded while we're probing
			function onupgrade(to){
				if (transport && to.name != transport.name) {
					debug('"%s" works - aborting "%s"', to.name, transport.name);
					freezeTransport();
				}
			}

			//Remove all listeners on the transport and on self
			function cleanup(){
				transport.removeListener('open', onTransportOpen);
				transport.removeListener('error', onerror);
				transport.removeListener('close', onTransportClose);
				self.removeListener('close', onclose);
				self.removeListener('upgrading', onupgrade);
			}

			transport.once('open', onTransportOpen);
			transport.once('error', onerror);
			transport.once('close', onTransportClose);

			this.once('close', onclose);
			this.once('upgrading', onupgrade);

			transport.open();

		};

		/**
		 * Called when connection is deemed open.
		 *
		 * @api public
		 */

		Socket.prototype.onOpen = function () {
			debug('socket open');
			this.readyState = 'open';
			Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
			this.emit('open');
			this.flush();

			// we check for `readyState` in case an `open`
			// listener already closed the socket
			if ('open' == this.readyState && this.upgrade && this.transport.pause) {
				debug('starting upgrade probes');
				for (var i = 0, l = this.upgrades.length; i < l; i++) {
					this.probe(this.upgrades[i]);
				}
			}
		};

		/**
		 * Handles a packet.
		 *
		 * @api private
		 */

		Socket.prototype.onPacket = function (packet) {
			if ('opening' == this.readyState || 'open' == this.readyState) {
				debug('socket receive: type "%s", data "%s"', packet.type, packet.data);

				this.emit('packet', packet);

				// Socket is live - any packet counts
				this.emit('heartbeat');

				switch (packet.type) {
					case 'open':
						this.onHandshake(parsejson(packet.data));
						break;

					case 'pong':
						this.setPing();
						break;

					case 'error':
						var err = new Error('server error');
						err.code = packet.data;
						this.emit('error', err);
						break;

					case 'message':
						this.emit('data', packet.data);
						this.emit('message', packet.data);
						break;
				}
			} else {
				debug('packet received with socket readyState "%s"', this.readyState);
			}
		};

		/**
		 * Called upon handshake completion.
		 *
		 * @param {Object} handshake obj
		 * @api private
		 */

		Socket.prototype.onHandshake = function (data) {
			this.emit('handshake', data);
			this.id = data.sid;
			this.transport.query.sid = data.sid;
			this.upgrades = this.filterUpgrades(data.upgrades);
			this.pingInterval = data.pingInterval;
			this.pingTimeout = data.pingTimeout;
			this.onOpen();
			// In case open handler closes socket
			if  ('closed' == this.readyState) return;
			this.setPing();

			// Prolong liveness of socket on heartbeat
			this.removeListener('heartbeat', this.onHeartbeat);
			this.on('heartbeat', this.onHeartbeat);
		};

		/**
		 * Resets ping timeout.
		 *
		 * @api private
		 */

		Socket.prototype.onHeartbeat = function (timeout) {
			clearTimeout(this.pingTimeoutTimer);
			var self = this;
			self.pingTimeoutTimer = setTimeout(function () {
				if ('closed' == self.readyState) return;
				self.onClose('ping timeout');
			}, timeout || (self.pingInterval + self.pingTimeout));
		};

		/**
		 * Pings server every `this.pingInterval` and expects response
		 * within `this.pingTimeout` or closes connection.
		 *
		 * @api private
		 */

		Socket.prototype.setPing = function () {
			var self = this;
			clearTimeout(self.pingIntervalTimer);
			self.pingIntervalTimer = setTimeout(function () {
				debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
				self.ping();
				self.onHeartbeat(self.pingTimeout);
			}, self.pingInterval);
		};

		/**
		 * Sends a ping packet.
		 *
		 * @api public
		 */

		Socket.prototype.ping = function () {
			this.sendPacket('ping');
		};

		/**
		 * Called on `drain` event
		 *
		 * @api private
		 */

		Socket.prototype.onDrain = function() {
			for (var i = 0; i < this.prevBufferLen; i++) {
				if (this.callbackBuffer[i]) {
					this.callbackBuffer[i]();
				}
			}

			this.writeBuffer.splice(0, this.prevBufferLen);
			this.callbackBuffer.splice(0, this.prevBufferLen);

			// setting prevBufferLen = 0 is very important
			// for example, when upgrading, upgrade packet is sent over,
			// and a nonzero prevBufferLen could cause problems on `drain`
			this.prevBufferLen = 0;

			if (this.writeBuffer.length == 0) {
				this.emit('drain');
			} else {
				this.flush();
			}
		};

		/**
		 * Flush write buffers.
		 *
		 * @api private
		 */

		Socket.prototype.flush = function () {
			if ('closed' != this.readyState && this.transport.writable &&
				!this.upgrading && this.writeBuffer.length) {
				debug('flushing %d packets in socket', this.writeBuffer.length);
				this.transport.send(this.writeBuffer);
				// keep track of current length of writeBuffer
				// splice writeBuffer and callbackBuffer on `drain`
				this.prevBufferLen = this.writeBuffer.length;
				this.emit('flush');
			}
		};

		/**
		 * Sends a message.
		 *
		 * @param {String} message.
		 * @param {Function} callback function.
		 * @return {Socket} for chaining.
		 * @api public
		 */

		Socket.prototype.write =
			Socket.prototype.send = function (msg, fn) {
				this.sendPacket('message', msg, fn);
				return this;
			};

		/**
		 * Sends a packet.
		 *
		 * @param {String} packet type.
		 * @param {String} data.
		 * @param {Function} callback function.
		 * @api private
		 */

		Socket.prototype.sendPacket = function (type, data, fn) {
			if ('closing' == this.readyState || 'closed' == this.readyState) {
				return;
			}

			var packet = { type: type, data: data };
			this.emit('packetCreate', packet);
			this.writeBuffer.push(packet);
			this.callbackBuffer.push(fn);
			this.flush();
		};

		/**
		 * Closes the connection.
		 *
		 * @api private
		 */

		Socket.prototype.close = function () {
			if ('opening' == this.readyState || 'open' == this.readyState) {
				this.readyState = 'closing';

				var self = this;

				function close() {
					self.onClose('forced close');
					debug('socket closing - telling transport to close');
					self.transport.close();
				}

				function cleanupAndClose() {
					self.removeListener('upgrade', cleanupAndClose);
					self.removeListener('upgradeError', cleanupAndClose);
					close();
				}

				function waitForUpgrade() {
					// wait for upgrade to finish since we can't send packets while pausing a transport
					self.once('upgrade', cleanupAndClose);
					self.once('upgradeError', cleanupAndClose);
				}

				if (this.writeBuffer.length) {
					this.once('drain', function() {
						if (this.upgrading) {
							waitForUpgrade();
						} else {
							close();
						}
					});
				} else if (this.upgrading) {
					waitForUpgrade();
				} else {
					close();
				}
			}

			return this;
		};

		/**
		 * Called upon transport error
		 *
		 * @api private
		 */

		Socket.prototype.onError = function (err) {
			debug('socket error %j', err);
			Socket.priorWebsocketSuccess = false;
			this.emit('error', err);
			this.onClose('transport error', err);
		};

		/**
		 * Called upon transport close.
		 *
		 * @api private
		 */

		Socket.prototype.onClose = function (reason, desc) {
			if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
				debug('socket close with reason: "%s"', reason);
				var self = this;

				// clear timers
				clearTimeout(this.pingIntervalTimer);
				clearTimeout(this.pingTimeoutTimer);

				// clean buffers in next tick, so developers can still
				// grab the buffers on `close` event
				setTimeout(function() {
					self.writeBuffer = [];
					self.callbackBuffer = [];
					self.prevBufferLen = 0;
				}, 0);

				// stop event from firing again for transport
				this.transport.removeAllListeners('close');

				// ensure transport won't stay open
				this.transport.close();

				// ignore further transport communication
				this.transport.removeAllListeners();

				// set ready state
				this.readyState = 'closed';

				// clear session id
				this.id = null;

				// emit close event
				this.emit('close', reason, desc);
			}
		};

		/**
		 * Filters upgrades, returning only those matching client transports.
		 *
		 * @param {Array} server upgrades
		 * @api private
		 *
		 */

		Socket.prototype.filterUpgrades = function (upgrades) {
			var filteredUpgrades = [];
			for (var i = 0, j = upgrades.length; i<j; i++) {
				if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
			}
			return filteredUpgrades;
		};

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./transport":13,"./transports":14,"component-emitter":8,"debug":20,"engine.io-parser":24,"indexof":44,"parsejson":52,"parseqs":53,"parseuri":23}],13:[function(require,module,exports){
	/**
	 * Module dependencies.
	 */

	var parser = require('engine.io-parser');
	var Emitter = require('component-emitter');

	/**
	 * Module exports.
	 */

	module.exports = Transport;

	/**
	 * Transport abstract constructor.
	 *
	 * @param {Object} options.
	 * @api private
	 */

	function Transport (opts) {
		this.path = opts.path;
		this.hostname = opts.hostname;
		this.port = opts.port;
		this.secure = opts.secure;
		this.query = opts.query;
		this.timestampParam = opts.timestampParam;
		this.timestampRequests = opts.timestampRequests;
		this.readyState = '';
		this.agent = opts.agent || false;
		this.socket = opts.socket;
		this.enablesXDR = opts.enablesXDR;

		// SSL options for Node.js client
		this.pfx = opts.pfx;
		this.key = opts.key;
		this.passphrase = opts.passphrase;
		this.cert = opts.cert;
		this.ca = opts.ca;
		this.ciphers = opts.ciphers;
		this.rejectUnauthorized = opts.rejectUnauthorized;
	}

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Transport.prototype);

	/**
	 * A counter used to prevent collisions in the timestamps used
	 * for cache busting.
	 */

	Transport.timestamps = 0;

	/**
	 * Emits an error.
	 *
	 * @param {String} str
	 * @return {Transport} for chaining
	 * @api public
	 */

	Transport.prototype.onError = function (msg, desc) {
		var err = new Error(msg);
		err.type = 'TransportError';
		err.description = desc;
		this.emit('error', err);
		return this;
	};

	/**
	 * Opens the transport.
	 *
	 * @api public
	 */

	Transport.prototype.open = function () {
		if ('closed' == this.readyState || '' == this.readyState) {
			this.readyState = 'opening';
			this.doOpen();
		}

		return this;
	};

	/**
	 * Closes the transport.
	 *
	 * @api private
	 */

	Transport.prototype.close = function () {
		if ('opening' == this.readyState || 'open' == this.readyState) {
			this.doClose();
			this.onClose();
		}

		return this;
	};

	/**
	 * Sends multiple packets.
	 *
	 * @param {Array} packets
	 * @api private
	 */

	Transport.prototype.send = function(packets){
		if ('open' == this.readyState) {
			this.write(packets);
		} else {
			throw new Error('Transport not open');
		}
	};

	/**
	 * Called upon open
	 *
	 * @api private
	 */

	Transport.prototype.onOpen = function () {
		this.readyState = 'open';
		this.writable = true;
		this.emit('open');
	};

	/**
	 * Called with data.
	 *
	 * @param {String} data
	 * @api private
	 */

	Transport.prototype.onData = function(data){
		var packet = parser.decodePacket(data, this.socket.binaryType);
		this.onPacket(packet);
	};

	/**
	 * Called with a decoded packet.
	 */

	Transport.prototype.onPacket = function (packet) {
		this.emit('packet', packet);
	};

	/**
	 * Called upon close.
	 *
	 * @api private
	 */

	Transport.prototype.onClose = function () {
		this.readyState = 'closed';
		this.emit('close');
	};

},{"component-emitter":8,"engine.io-parser":24}],14:[function(require,module,exports){
	(function (global){
		/**
		 * Module dependencies
		 */

		var XMLHttpRequest = require('xmlhttprequest');
		var XHR = require('./polling-xhr');
		var JSONP = require('./polling-jsonp');
		var websocket = require('./websocket');

		/**
		 * Export transports.
		 */

		exports.polling = polling;
		exports.websocket = websocket;

		/**
		 * Polling transport polymorphic constructor.
		 * Decides on xhr vs jsonp based on feature detection.
		 *
		 * @api private
		 */

		function polling(opts){
			var xhr;
			var xd = false;
			var xs = false;
			var jsonp = false !== opts.jsonp;

			if (global.location) {
				var isSSL = 'https:' == location.protocol;
				var port = location.port;

				// some user agents have empty `location.port`
				if (!port) {
					port = isSSL ? 443 : 80;
				}

				xd = opts.hostname != location.hostname || port != opts.port;
				xs = opts.secure != isSSL;
			}

			opts.xdomain = xd;
			opts.xscheme = xs;
			xhr = new XMLHttpRequest(opts);

			if ('open' in xhr && !opts.forceJSONP) {
				return new XHR(opts);
			} else {
				if (!jsonp) throw new Error('JSONP disabled');
				return new JSONP(opts);
			}
		}

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling-jsonp":15,"./polling-xhr":16,"./websocket":18,"xmlhttprequest":19}],15:[function(require,module,exports){
	(function (global){

		/**
		 * Module requirements.
		 */

		var Polling = require('./polling');
		var inherit = require('component-inherit');

		/**
		 * Module exports.
		 */

		module.exports = JSONPPolling;

		/**
		 * Cached regular expressions.
		 */

		var rNewline = /\n/g;
		var rEscapedNewline = /\\n/g;

		/**
		 * Global JSONP callbacks.
		 */

		var callbacks;

		/**
		 * Callbacks count.
		 */

		var index = 0;

		/**
		 * Noop.
		 */

		function empty () { }

		/**
		 * JSONP Polling constructor.
		 *
		 * @param {Object} opts.
		 * @api public
		 */

		function JSONPPolling (opts) {
			Polling.call(this, opts);

			this.query = this.query || {};

			// define global callbacks array if not present
			// we do this here (lazily) to avoid unneeded global pollution
			if (!callbacks) {
				// we need to consider multiple engines in the same page
				if (!global.___eio) global.___eio = [];
				callbacks = global.___eio;
			}

			// callback identifier
			this.index = callbacks.length;

			// add callback to jsonp global
			var self = this;
			callbacks.push(function (msg) {
				self.onData(msg);
			});

			// append to query string
			this.query.j = this.index;

			// prevent spurious errors from being emitted when the window is unloaded
			if (global.document && global.addEventListener) {
				global.addEventListener('beforeunload', function () {
					if (self.script) self.script.onerror = empty;
				}, false);
			}
		}

		/**
		 * Inherits from Polling.
		 */

		inherit(JSONPPolling, Polling);

		/*
		 * JSONP only supports binary as base64 encoded strings
		 */

		JSONPPolling.prototype.supportsBinary = false;

		/**
		 * Closes the socket.
		 *
		 * @api private
		 */

		JSONPPolling.prototype.doClose = function () {
			if (this.script) {
				this.script.parentNode.removeChild(this.script);
				this.script = null;
			}

			if (this.form) {
				this.form.parentNode.removeChild(this.form);
				this.form = null;
				this.iframe = null;
			}

			Polling.prototype.doClose.call(this);
		};

		/**
		 * Starts a poll cycle.
		 *
		 * @api private
		 */

		JSONPPolling.prototype.doPoll = function () {
			var self = this;
			var script = document.createElement('script');

			if (this.script) {
				this.script.parentNode.removeChild(this.script);
				this.script = null;
			}

			script.async = true;
			script.src = this.uri();
			script.onerror = function(e){
				self.onError('jsonp poll error',e);
			};

			var insertAt = document.getElementsByTagName('script')[0];
			insertAt.parentNode.insertBefore(script, insertAt);
			this.script = script;

			var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);

			if (isUAgecko) {
				setTimeout(function () {
					var iframe = document.createElement('iframe');
					document.body.appendChild(iframe);
					document.body.removeChild(iframe);
				}, 100);
			}
		};

		/**
		 * Writes with a hidden iframe.
		 *
		 * @param {String} data to send
		 * @param {Function} called upon flush.
		 * @api private
		 */

		JSONPPolling.prototype.doWrite = function (data, fn) {
			var self = this;

			if (!this.form) {
				var form = document.createElement('form');
				var area = document.createElement('textarea');
				var id = this.iframeId = 'eio_iframe_' + this.index;
				var iframe;

				form.className = 'socketio';
				form.style.position = 'absolute';
				form.style.top = '-1000px';
				form.style.left = '-1000px';
				form.target = id;
				form.method = 'POST';
				form.setAttribute('accept-charset', 'utf-8');
				area.name = 'd';
				form.appendChild(area);
				document.body.appendChild(form);

				this.form = form;
				this.area = area;
			}

			this.form.action = this.uri();

			function complete () {
				initIframe();
				fn();
			}

			function initIframe () {
				if (self.iframe) {
					try {
						self.form.removeChild(self.iframe);
					} catch (e) {
						self.onError('jsonp polling iframe removal error', e);
					}
				}

				try {
					// ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
					var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
					iframe = document.createElement(html);
				} catch (e) {
					iframe = document.createElement('iframe');
					iframe.name = self.iframeId;
					iframe.src = 'javascript:0';
				}

				iframe.id = self.iframeId;

				self.form.appendChild(iframe);
				self.iframe = iframe;
			}

			initIframe();

			// escape \n to prevent it from being converted into \r\n by some UAs
			// double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
			data = data.replace(rEscapedNewline, '\\\n');
			this.area.value = data.replace(rNewline, '\\n');

			try {
				this.form.submit();
			} catch(e) {}

			if (this.iframe.attachEvent) {
				this.iframe.onreadystatechange = function(){
					if (self.iframe.readyState == 'complete') {
						complete();
					}
				};
			} else {
				this.iframe.onload = complete;
			}
		};

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling":17,"component-inherit":9}],16:[function(require,module,exports){
	(function (global){
		/**
		 * Module requirements.
		 */

		var XMLHttpRequest = require('xmlhttprequest');
		var Polling = require('./polling');
		var Emitter = require('component-emitter');
		var inherit = require('component-inherit');
		var debug = require('debug')('engine.io-client:polling-xhr');

		/**
		 * Module exports.
		 */

		module.exports = XHR;
		module.exports.Request = Request;

		/**
		 * Empty function
		 */

		function empty(){}

		/**
		 * XHR Polling constructor.
		 *
		 * @param {Object} opts
		 * @api public
		 */

		function XHR(opts){
			Polling.call(this, opts);

			if (global.location) {
				var isSSL = 'https:' == location.protocol;
				var port = location.port;

				// some user agents have empty `location.port`
				if (!port) {
					port = isSSL ? 443 : 80;
				}

				this.xd = opts.hostname != global.location.hostname ||
					port != opts.port;
				this.xs = opts.secure != isSSL;
			}
		}

		/**
		 * Inherits from Polling.
		 */

		inherit(XHR, Polling);

		/**
		 * XHR supports binary
		 */

		XHR.prototype.supportsBinary = true;

		/**
		 * Creates a request.
		 *
		 * @param {String} method
		 * @api private
		 */

		XHR.prototype.request = function(opts){
			opts = opts || {};
			opts.uri = this.uri();
			opts.xd = this.xd;
			opts.xs = this.xs;
			opts.agent = this.agent || false;
			opts.supportsBinary = this.supportsBinary;
			opts.enablesXDR = this.enablesXDR;

			// SSL options for Node.js client
			opts.pfx = this.pfx;
			opts.key = this.key;
			opts.passphrase = this.passphrase;
			opts.cert = this.cert;
			opts.ca = this.ca;
			opts.ciphers = this.ciphers;
			opts.rejectUnauthorized = this.rejectUnauthorized;

			return new Request(opts);
		};

		/**
		 * Sends data.
		 *
		 * @param {String} data to send.
		 * @param {Function} called upon flush.
		 * @api private
		 */

		XHR.prototype.doWrite = function(data, fn){
			var isBinary = typeof data !== 'string' && data !== undefined;
			var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
			var self = this;
			req.on('success', fn);
			req.on('error', function(err){
				self.onError('xhr post error', err);
			});
			this.sendXhr = req;
		};

		/**
		 * Starts a poll cycle.
		 *
		 * @api private
		 */

		XHR.prototype.doPoll = function(){
			debug('xhr poll');
			var req = this.request();
			var self = this;
			req.on('data', function(data){
				self.onData(data);
			});
			req.on('error', function(err){
				self.onError('xhr poll error', err);
			});
			this.pollXhr = req;
		};

		/**
		 * Request constructor
		 *
		 * @param {Object} options
		 * @api public
		 */

		function Request(opts){
			this.method = opts.method || 'GET';
			this.uri = opts.uri;
			this.xd = !!opts.xd;
			this.xs = !!opts.xs;
			this.async = false !== opts.async;
			this.data = undefined != opts.data ? opts.data : null;
			this.agent = opts.agent;
			this.isBinary = opts.isBinary;
			this.supportsBinary = opts.supportsBinary;
			this.enablesXDR = opts.enablesXDR;

			// SSL options for Node.js client
			this.pfx = opts.pfx;
			this.key = opts.key;
			this.passphrase = opts.passphrase;
			this.cert = opts.cert;
			this.ca = opts.ca;
			this.ciphers = opts.ciphers;
			this.rejectUnauthorized = opts.rejectUnauthorized;

			this.create();
		}

		/**
		 * Mix in `Emitter`.
		 */

		Emitter(Request.prototype);

		/**
		 * Creates the XHR object and sends the request.
		 *
		 * @api private
		 */

		Request.prototype.create = function(){
			var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };

			// SSL options for Node.js client
			opts.pfx = this.pfx;
			opts.key = this.key;
			opts.passphrase = this.passphrase;
			opts.cert = this.cert;
			opts.ca = this.ca;
			opts.ciphers = this.ciphers;
			opts.rejectUnauthorized = this.rejectUnauthorized;

			var xhr = this.xhr = new XMLHttpRequest(opts);
			var self = this;

			try {
				debug('xhr open %s: %s', this.method, this.uri);
				xhr.open(this.method, this.uri, this.async);
				if (this.supportsBinary) {
					// This has to be done after open because Firefox is stupid
					// http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
					xhr.responseType = 'arraybuffer';
				}

				if ('POST' == this.method) {
					try {
						if (this.isBinary) {
							xhr.setRequestHeader('Content-type', 'application/octet-stream');
						} else {
							xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
						}
					} catch (e) {}
				}

				// ie6 check
				if ('withCredentials' in xhr) {
					xhr.withCredentials = true;
				}

				if (this.hasXDR()) {
					xhr.onload = function(){
						self.onLoad();
					};
					xhr.onerror = function(){
						self.onError(xhr.responseText);
					};
				} else {
					xhr.onreadystatechange = function(){
						if (4 != xhr.readyState) return;
						if (200 == xhr.status || 1223 == xhr.status) {
							self.onLoad();
						} else {
							// make sure the `error` event handler that's user-set
							// does not throw in the same tick and gets caught here
							setTimeout(function(){
								self.onError(xhr.status);
							}, 0);
						}
					};
				}

				debug('xhr data %s', this.data);
				xhr.send(this.data);
			} catch (e) {
				// Need to defer since .create() is called directly fhrom the constructor
				// and thus the 'error' event can only be only bound *after* this exception
				// occurs.  Therefore, also, we cannot throw here at all.
				setTimeout(function() {
					self.onError(e);
				}, 0);
				return;
			}

			if (global.document) {
				this.index = Request.requestsCount++;
				Request.requests[this.index] = this;
			}
		};

		/**
		 * Called upon successful response.
		 *
		 * @api private
		 */

		Request.prototype.onSuccess = function(){
			this.emit('success');
			this.cleanup();
		};

		/**
		 * Called if we have data.
		 *
		 * @api private
		 */

		Request.prototype.onData = function(data){
			this.emit('data', data);
			this.onSuccess();
		};

		/**
		 * Called upon error.
		 *
		 * @api private
		 */

		Request.prototype.onError = function(err){
			this.emit('error', err);
			this.cleanup(true);
		};

		/**
		 * Cleans up house.
		 *
		 * @api private
		 */

		Request.prototype.cleanup = function(fromError){
			if ('undefined' == typeof this.xhr || null === this.xhr) {
				return;
			}
			// xmlhttprequest
			if (this.hasXDR()) {
				this.xhr.onload = this.xhr.onerror = empty;
			} else {
				this.xhr.onreadystatechange = empty;
			}

			if (fromError) {
				try {
					this.xhr.abort();
				} catch(e) {}
			}

			if (global.document) {
				delete Request.requests[this.index];
			}

			this.xhr = null;
		};

		/**
		 * Called upon load.
		 *
		 * @api private
		 */

		Request.prototype.onLoad = function(){
			var data;
			try {
				var contentType;
				try {
					contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
				} catch (e) {}
				if (contentType === 'application/octet-stream') {
					data = this.xhr.response;
				} else {
					if (!this.supportsBinary) {
						data = this.xhr.responseText;
					} else {
						data = 'ok';
					}
				}
			} catch (e) {
				this.onError(e);
			}
			if (null != data) {
				this.onData(data);
			}
		};

		/**
		 * Check if it has XDomainRequest.
		 *
		 * @api private
		 */

		Request.prototype.hasXDR = function(){
			return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
		};

		/**
		 * Aborts the request.
		 *
		 * @api public
		 */

		Request.prototype.abort = function(){
			this.cleanup();
		};

		/**
		 * Aborts pending requests when unloading the window. This is needed to prevent
		 * memory leaks (e.g. when using IE) and to ensure that no spurious error is
		 * emitted.
		 */

		if (global.document) {
			Request.requestsCount = 0;
			Request.requests = {};
			if (global.attachEvent) {
				global.attachEvent('onunload', unloadHandler);
			} else if (global.addEventListener) {
				global.addEventListener('beforeunload', unloadHandler, false);
			}
		}

		function unloadHandler() {
			for (var i in Request.requests) {
				if (Request.requests.hasOwnProperty(i)) {
					Request.requests[i].abort();
				}
			}
		}

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./polling":17,"component-emitter":8,"component-inherit":9,"debug":20,"xmlhttprequest":19}],17:[function(require,module,exports){
	/**
	 * Module dependencies.
	 */

	var Transport = require('../transport');
	var parseqs = require('parseqs');
	var parser = require('engine.io-parser');
	var inherit = require('component-inherit');
	var debug = require('debug')('engine.io-client:polling');

	/**
	 * Module exports.
	 */

	module.exports = Polling;

	/**
	 * Is XHR2 supported?
	 */

	var hasXHR2 = (function() {
		var XMLHttpRequest = require('xmlhttprequest');
		var xhr = new XMLHttpRequest({ xdomain: false });
		return null != xhr.responseType;
	})();

	/**
	 * Polling interface.
	 *
	 * @param {Object} opts
	 * @api private
	 */

	function Polling(opts){
		var forceBase64 = (opts && opts.forceBase64);
		if (!hasXHR2 || forceBase64) {
			this.supportsBinary = false;
		}
		Transport.call(this, opts);
	}

	/**
	 * Inherits from Transport.
	 */

	inherit(Polling, Transport);

	/**
	 * Transport name.
	 */

	Polling.prototype.name = 'polling';

	/**
	 * Opens the socket (triggers polling). We write a PING message to determine
	 * when the transport is open.
	 *
	 * @api private
	 */

	Polling.prototype.doOpen = function(){
		this.poll();
	};

	/**
	 * Pauses polling.
	 *
	 * @param {Function} callback upon buffers are flushed and transport is paused
	 * @api private
	 */

	Polling.prototype.pause = function(onPause){
		var pending = 0;
		var self = this;

		this.readyState = 'pausing';

		function pause(){
			debug('paused');
			self.readyState = 'paused';
			onPause();
		}

		if (this.polling || !this.writable) {
			var total = 0;

			if (this.polling) {
				debug('we are currently polling - waiting to pause');
				total++;
				this.once('pollComplete', function(){
					debug('pre-pause polling complete');
					--total || pause();
				});
			}

			if (!this.writable) {
				debug('we are currently writing - waiting to pause');
				total++;
				this.once('drain', function(){
					debug('pre-pause writing complete');
					--total || pause();
				});
			}
		} else {
			pause();
		}
	};

	/**
	 * Starts polling cycle.
	 *
	 * @api public
	 */

	Polling.prototype.poll = function(){
		debug('polling');
		this.polling = true;
		this.doPoll();
		this.emit('poll');
	};

	/**
	 * Overloads onData to detect payloads.
	 *
	 * @api private
	 */

	Polling.prototype.onData = function(data){
		var self = this;
		debug('polling got data %s', data);
		var callback = function(packet, index, total) {
			// if its the first message we consider the transport open
			if ('opening' == self.readyState) {
				self.onOpen();
			}

			// if its a close packet, we close the ongoing requests
			if ('close' == packet.type) {
				self.onClose();
				return false;
			}

			// otherwise bypass onData and handle the message
			self.onPacket(packet);
		};

		// decode payload
		parser.decodePayload(data, this.socket.binaryType, callback);

		// if an event did not trigger closing
		if ('closed' != this.readyState) {
			// if we got data we're not polling
			this.polling = false;
			this.emit('pollComplete');

			if ('open' == this.readyState) {
				this.poll();
			} else {
				debug('ignoring poll - transport state "%s"', this.readyState);
			}
		}
	};

	/**
	 * For polling, send a close packet.
	 *
	 * @api private
	 */

	Polling.prototype.doClose = function(){
		var self = this;

		function close(){
			debug('writing close packet');
			self.write([{ type: 'close' }]);
		}

		if ('open' == this.readyState) {
			debug('transport open - closing');
			close();
		} else {
			// in case we're trying to close while
			// handshaking is in progress (GH-164)
			debug('transport not open - deferring close');
			this.once('open', close);
		}
	};

	/**
	 * Writes a packets payload.
	 *
	 * @param {Array} data packets
	 * @param {Function} drain callback
	 * @api private
	 */

	Polling.prototype.write = function(packets){
		var self = this;
		this.writable = false;
		var callbackfn = function() {
			self.writable = true;
			self.emit('drain');
		};

		var self = this;
		parser.encodePayload(packets, this.supportsBinary, function(data) {
			self.doWrite(data, callbackfn);
		});
	};

	/**
	 * Generates uri for connection.
	 *
	 * @api private
	 */

	Polling.prototype.uri = function(){
		var query = this.query || {};
		var schema = this.secure ? 'https' : 'http';
		var port = '';

		// cache busting is forced
		if (false !== this.timestampRequests) {
			query[this.timestampParam] = +new Date + '-' + Transport.timestamps++;
		}

		if (!this.supportsBinary && !query.sid) {
			query.b64 = 1;
		}

		query = parseqs.encode(query);

		// avoid port if default for schema
		if (this.port && (('https' == schema && this.port != 443) ||
			('http' == schema && this.port != 80))) {
			port = ':' + this.port;
		}

		// prepend ? to query
		if (query.length) {
			query = '?' + query;
		}

		return schema + '://' + this.hostname + port + this.path + query;
	};

},{"../transport":13,"component-inherit":9,"debug":20,"engine.io-parser":24,"parseqs":53,"xmlhttprequest":19}],18:[function(require,module,exports){
	/**
	 * Module dependencies.
	 */

	var Transport = require('../transport');
	var parser = require('engine.io-parser');
	var parseqs = require('parseqs');
	var inherit = require('component-inherit');
	var debug = require('debug')('engine.io-client:websocket');

	/**
	 * `ws` exposes a WebSocket-compatible interface in
	 * Node, or the `WebSocket` or `MozWebSocket` globals
	 * in the browser.
	 */

	var WebSocket = require('ws');

	/**
	 * Module exports.
	 */

	module.exports = WS;

	/**
	 * WebSocket transport constructor.
	 *
	 * @api {Object} connection options
	 * @api public
	 */

	function WS(opts){
		var forceBase64 = (opts && opts.forceBase64);
		if (forceBase64) {
			this.supportsBinary = false;
		}
		Transport.call(this, opts);
	}

	/**
	 * Inherits from Transport.
	 */

	inherit(WS, Transport);

	/**
	 * Transport name.
	 *
	 * @api public
	 */

	WS.prototype.name = 'websocket';

	/*
	 * WebSockets support binary
	 */

	WS.prototype.supportsBinary = true;

	/**
	 * Opens socket.
	 *
	 * @api private
	 */

	WS.prototype.doOpen = function(){
		if (!this.check()) {
			// let probe timeout
			return;
		}

		var self = this;
		var uri = this.uri();
		var protocols = void(0);
		var opts = { agent: this.agent };

		// SSL options for Node.js client
		opts.pfx = this.pfx;
		opts.key = this.key;
		opts.passphrase = this.passphrase;
		opts.cert = this.cert;
		opts.ca = this.ca;
		opts.ciphers = this.ciphers;
		opts.rejectUnauthorized = this.rejectUnauthorized;

		this.ws = new WebSocket(uri, protocols, opts);

		if (this.ws.binaryType === undefined) {
			this.supportsBinary = false;
		}

		this.ws.binaryType = 'arraybuffer';
		this.addEventListeners();
	};

	/**
	 * Adds event listeners to the socket
	 *
	 * @api private
	 */

	WS.prototype.addEventListeners = function(){
		var self = this;

		this.ws.onopen = function(){
			self.onOpen();
		};
		this.ws.onclose = function(){
			self.onClose();
		};
		this.ws.onmessage = function(ev){
			self.onData(ev.data);
		};
		this.ws.onerror = function(e){
			self.onError('websocket error', e);
		};
	};

	/**
	 * Override `onData` to use a timer on iOS.
	 * See: https://gist.github.com/mloughran/2052006
	 *
	 * @api private
	 */

	if ('undefined' != typeof navigator
		&& /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
		WS.prototype.onData = function(data){
			var self = this;
			setTimeout(function(){
				Transport.prototype.onData.call(self, data);
			}, 0);
		};
	}

	/**
	 * Writes data to socket.
	 *
	 * @param {Array} array of packets.
	 * @api private
	 */

	WS.prototype.write = function(packets){
		var self = this;
		this.writable = false;
		// encodePacket efficient as it uses WS framing
		// no need for encodePayload
		for (var i = 0, l = packets.length; i < l; i++) {
			parser.encodePacket(packets[i], this.supportsBinary, function(data) {
				//Sometimes the websocket has already been closed but the browser didn't
				//have a chance of informing us about it yet, in that case send will
				//throw an error
				try {
					self.ws.send(data);
				} catch (e){
					debug('websocket closed before onclose event');
				}
			});
		}

		function ondrain() {
			self.writable = true;
			self.emit('drain');
		}
		// fake drain
		// defer to next tick to allow Socket to clear writeBuffer
		setTimeout(ondrain, 0);
	};

	/**
	 * Called upon close
	 *
	 * @api private
	 */

	WS.prototype.onClose = function(){
		Transport.prototype.onClose.call(this);
	};

	/**
	 * Closes socket.
	 *
	 * @api private
	 */

	WS.prototype.doClose = function(){
		if (typeof this.ws !== 'undefined') {
			this.ws.close();
		}
	};

	/**
	 * Generates uri for connection.
	 *
	 * @api private
	 */

	WS.prototype.uri = function(){
		var query = this.query || {};
		var schema = this.secure ? 'wss' : 'ws';
		var port = '';

		// avoid port if default for schema
		if (this.port && (('wss' == schema && this.port != 443)
			|| ('ws' == schema && this.port != 80))) {
			port = ':' + this.port;
		}

		// append timestamp to URI
		if (this.timestampRequests) {
			query[this.timestampParam] = +new Date;
		}

		// communicate binary support capabilities
		if (!this.supportsBinary) {
			query.b64 = 1;
		}

		query = parseqs.encode(query);

		// prepend ? to query
		if (query.length) {
			query = '?' + query;
		}

		return schema + '://' + this.hostname + port + this.path + query;
	};

	/**
	 * Feature detection for WebSocket.
	 *
	 * @return {Boolean} whether this transport is available.
	 * @api public
	 */

	WS.prototype.check = function(){
		return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
	};

},{"../transport":13,"component-inherit":9,"debug":20,"engine.io-parser":24,"parseqs":53,"ws":101}],19:[function(require,module,exports){
// browser shim for xmlhttprequest module
	var hasCORS = require('has-cors');

	module.exports = function(opts) {
		var xdomain = opts.xdomain;

		// scheme must be same when usign XDomainRequest
		// http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
		var xscheme = opts.xscheme;

		// XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
		// https://github.com/Automattic/engine.io-client/pull/217
		var enablesXDR = opts.enablesXDR;

		// XMLHttpRequest can be disabled on IE
		try {
			if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
				return new XMLHttpRequest();
			}
		} catch (e) { }

		// Use XDomainRequest for IE8 if enablesXDR is true
		// because loading bar keeps flashing when using jsonp-polling
		// https://github.com/yujiosaka/socke.io-ie8-loading-example
		try {
			if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
				return new XDomainRequest();
			}
		} catch (e) { }

		if (!xdomain) {
			try {
				return new ActiveXObject('Microsoft.XMLHTTP');
			} catch(e) { }
		}
	}

},{"has-cors":43}],20:[function(require,module,exports){

	/**
	 * This is the web browser implementation of `debug()`.
	 *
	 * Expose `debug()` as the module.
	 */

	exports = module.exports = require('./debug');
	exports.log = log;
	exports.formatArgs = formatArgs;
	exports.save = save;
	exports.load = load;
	exports.useColors = useColors;

	/**
	 * Colors.
	 */

	exports.colors = [
		'lightseagreen',
		'forestgreen',
		'goldenrod',
		'dodgerblue',
		'darkorchid',
		'crimson'
	];

	/**
	 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
	 * and the Firebug extension (any Firefox version) are known
	 * to support "%c" CSS customizations.
	 *
	 * TODO: add a `localStorage` variable to explicitly enable/disable colors
	 */

	function useColors() {
		// is webkit? http://stackoverflow.com/a/16459606/376773
		return ('WebkitAppearance' in document.documentElement.style) ||
			// is firebug? http://stackoverflow.com/a/398120/376773
			(window.console && (console.firebug || (console.exception && console.table))) ||
			// is firefox >= v31?
			// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
			(navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
	}

	/**
	 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
	 */

	exports.formatters.j = function(v) {
		return JSON.stringify(v);
	};


	/**
	 * Colorize log arguments if enabled.
	 *
	 * @api public
	 */

	function formatArgs() {
		var args = arguments;
		var useColors = this.useColors;

		args[0] = (useColors ? '%c' : '')
			+ this.namespace
			+ (useColors ? ' %c' : ' ')
			+ args[0]
			+ (useColors ? '%c ' : ' ')
			+ '+' + exports.humanize(this.diff);

		if (!useColors) return args;

		var c = 'color: ' + this.color;
		args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));

		// the final "%c" is somewhat tricky, because there could be other
		// arguments passed either before or after the %c, so we need to
		// figure out the correct index to insert the CSS into
		var index = 0;
		var lastC = 0;
		args[0].replace(/%[a-z%]/g, function(match) {
			if ('%%' === match) return;
			index++;
			if ('%c' === match) {
				// we only are interested in the *last* %c
				// (the user may have provided their own)
				lastC = index;
			}
		});

		args.splice(lastC, 0, c);
		return args;
	}

	/**
	 * Invokes `console.log()` when available.
	 * No-op when `console.log` is not a "function".
	 *
	 * @api public
	 */

	function log() {
		// This hackery is required for IE8,
		// where the `console.log` function doesn't have 'apply'
		return 'object' == typeof console
			&& 'function' == typeof console.log
			&& Function.prototype.apply.call(console.log, console, arguments);
	}

	/**
	 * Save `namespaces`.
	 *
	 * @param {String} namespaces
	 * @api private
	 */

	function save(namespaces) {
		try {
			if (null == namespaces) {
				localStorage.removeItem('debug');
			} else {
				localStorage.debug = namespaces;
			}
		} catch(e) {}
	}

	/**
	 * Load `namespaces`.
	 *
	 * @return {String} returns the previously persisted debug modes
	 * @api private
	 */

	function load() {
		var r;
		try {
			r = localStorage.debug;
		} catch(e) {}
		return r;
	}

	/**
	 * Enable namespaces listed in `localStorage.debug` initially.
	 */

	exports.enable(load());

},{"./debug":21}],21:[function(require,module,exports){

	/**
	 * This is the common logic for both the Node.js and web browser
	 * implementations of `debug()`.
	 *
	 * Expose `debug()` as the module.
	 */

	exports = module.exports = debug;
	exports.coerce = coerce;
	exports.disable = disable;
	exports.enable = enable;
	exports.enabled = enabled;
	exports.humanize = require('ms');

	/**
	 * The currently active debug mode names, and names to skip.
	 */

	exports.names = [];
	exports.skips = [];

	/**
	 * Map of special "%n" handling functions, for the debug "format" argument.
	 *
	 * Valid key names are a single, lowercased letter, i.e. "n".
	 */

	exports.formatters = {};

	/**
	 * Previously assigned color.
	 */

	var prevColor = 0;

	/**
	 * Previous log timestamp.
	 */

	var prevTime;

	/**
	 * Select a color.
	 *
	 * @return {Number}
	 * @api private
	 */

	function selectColor() {
		return exports.colors[prevColor++ % exports.colors.length];
	}

	/**
	 * Create a debugger with the given `namespace`.
	 *
	 * @param {String} namespace
	 * @return {Function}
	 * @api public
	 */

	function debug(namespace) {

		// define the `disabled` version
		function disabled() {
		}
		disabled.enabled = false;

		// define the `enabled` version
		function enabled() {

			var self = enabled;

			// set `diff` timestamp
			var curr = +new Date();
			var ms = curr - (prevTime || curr);
			self.diff = ms;
			self.prev = prevTime;
			self.curr = curr;
			prevTime = curr;

			// add the `color` if not set
			if (null == self.useColors) self.useColors = exports.useColors();
			if (null == self.color && self.useColors) self.color = selectColor();

			var args = Array.prototype.slice.call(arguments);

			args[0] = exports.coerce(args[0]);

			if ('string' !== typeof args[0]) {
				// anything else let's inspect with %o
				args = ['%o'].concat(args);
			}

			// apply any `formatters` transformations
			var index = 0;
			args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
				// if we encounter an escaped % then don't increase the array index
				if (match === '%%') return match;
				index++;
				var formatter = exports.formatters[format];
				if ('function' === typeof formatter) {
					var val = args[index];
					match = formatter.call(self, val);

					// now we need to remove `args[index]` since it's inlined in the `format`
					args.splice(index, 1);
					index--;
				}
				return match;
			});

			if ('function' === typeof exports.formatArgs) {
				args = exports.formatArgs.apply(self, args);
			}
			var logFn = enabled.log || exports.log || console.log.bind(console);
			logFn.apply(self, args);
		}
		enabled.enabled = true;

		var fn = exports.enabled(namespace) ? enabled : disabled;

		fn.namespace = namespace;

		return fn;
	}

	/**
	 * Enables a debug mode by namespaces. This can include modes
	 * separated by a colon and wildcards.
	 *
	 * @param {String} namespaces
	 * @api public
	 */

	function enable(namespaces) {
		exports.save(namespaces);

		var split = (namespaces || '').split(/[\s,]+/);
		var len = split.length;

		for (var i = 0; i < len; i++) {
			if (!split[i]) continue; // ignore empty strings
			namespaces = split[i].replace(/\*/g, '.*?');
			if (namespaces[0] === '-') {
				exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
			} else {
				exports.names.push(new RegExp('^' + namespaces + '$'));
			}
		}
	}

	/**
	 * Disable debug output.
	 *
	 * @api public
	 */

	function disable() {
		exports.enable('');
	}

	/**
	 * Returns true if the given mode name is enabled, false otherwise.
	 *
	 * @param {String} name
	 * @return {Boolean}
	 * @api public
	 */

	function enabled(name) {
		var i, len;
		for (i = 0, len = exports.skips.length; i < len; i++) {
			if (exports.skips[i].test(name)) {
				return false;
			}
		}
		for (i = 0, len = exports.names.length; i < len; i++) {
			if (exports.names[i].test(name)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Coerce `val`.
	 *
	 * @param {Mixed} val
	 * @return {Mixed}
	 * @api private
	 */

	function coerce(val) {
		if (val instanceof Error) return val.stack || val.message;
		return val;
	}

},{"ms":22}],22:[function(require,module,exports){
	/**
	 * Helpers.
	 */

	var s = 1000;
	var m = s * 60;
	var h = m * 60;
	var d = h * 24;
	var y = d * 365.25;

	/**
	 * Parse or format the given `val`.
	 *
	 * Options:
	 *
	 *  - `long` verbose formatting [false]
	 *
	 * @param {String|Number} val
	 * @param {Object} options
	 * @return {String|Number}
	 * @api public
	 */

	module.exports = function(val, options){
		options = options || {};
		if ('string' == typeof val) return parse(val);
		return options.long
			? long(val)
			: short(val);
	};

	/**
	 * Parse the given `str` and return milliseconds.
	 *
	 * @param {String} str
	 * @return {Number}
	 * @api private
	 */

	function parse(str) {
		var match = /^((?:\d+)?\.?\d+) *(ms|seconds?|s|minutes?|m|hours?|h|days?|d|years?|y)?$/i.exec(str);
		if (!match) return;
		var n = parseFloat(match[1]);
		var type = (match[2] || 'ms').toLowerCase();
		switch (type) {
			case 'years':
			case 'year':
			case 'y':
				return n * y;
			case 'days':
			case 'day':
			case 'd':
				return n * d;
			case 'hours':
			case 'hour':
			case 'h':
				return n * h;
			case 'minutes':
			case 'minute':
			case 'm':
				return n * m;
			case 'seconds':
			case 'second':
			case 's':
				return n * s;
			case 'ms':
				return n;
		}
	}

	/**
	 * Short format for `ms`.
	 *
	 * @param {Number} ms
	 * @return {String}
	 * @api private
	 */

	function short(ms) {
		if (ms >= d) return Math.round(ms / d) + 'd';
		if (ms >= h) return Math.round(ms / h) + 'h';
		if (ms >= m) return Math.round(ms / m) + 'm';
		if (ms >= s) return Math.round(ms / s) + 's';
		return ms + 'ms';
	}

	/**
	 * Long format for `ms`.
	 *
	 * @param {Number} ms
	 * @return {String}
	 * @api private
	 */

	function long(ms) {
		return plural(ms, d, 'day')
			|| plural(ms, h, 'hour')
			|| plural(ms, m, 'minute')
			|| plural(ms, s, 'second')
			|| ms + ' ms';
	}

	/**
	 * Pluralization helper.
	 */

	function plural(ms, n, name) {
		if (ms < n) return;
		if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
		return Math.ceil(ms / n) + ' ' + name + 's';
	}

},{}],23:[function(require,module,exports){
	/**
	 * Parses an URI
	 *
	 * @author Steven Levithan <stevenlevithan.com> (MIT license)
	 * @api private
	 */

	var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

	var parts = [
		'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
	];

	module.exports = function parseuri(str) {
		var src = str,
			b = str.indexOf('['),
			e = str.indexOf(']');

		if (b != -1 && e != -1) {
			str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
		}

		var m = re.exec(str || ''),
			uri = {},
			i = 14;

		while (i--) {
			uri[parts[i]] = m[i] || '';
		}

		if (b != -1 && e != -1) {
			uri.source = src;
			uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
			uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
			uri.ipv6uri = true;
		}

		return uri;
	};

},{}],24:[function(require,module,exports){
	(function (global){
		/**
		 * Module dependencies.
		 */

		var keys = require('./keys');
		var hasBinary = require('has-binary');
		var sliceBuffer = require('arraybuffer.slice');
		var base64encoder = require('base64-arraybuffer');
		var after = require('after');
		var utf8 = require('utf8');

		/**
		 * Check if we are running an android browser. That requires us to use
		 * ArrayBuffer with polling transports...
		 *
		 * http://ghinda.net/jpeg-blob-ajax-android/
		 */

		var isAndroid = navigator.userAgent.match(/Android/i);

		/**
		 * Check if we are running in PhantomJS.
		 * Uploading a Blob with PhantomJS does not work correctly, as reported here:
		 * https://github.com/ariya/phantomjs/issues/11395
		 * @type boolean
		 */
		var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);

		/**
		 * When true, avoids using Blobs to encode payloads.
		 * @type boolean
		 */
		var dontSendBlobs = isAndroid || isPhantomJS;

		/**
		 * Current protocol version.
		 */

		exports.protocol = 3;

		/**
		 * Packet types.
		 */

		var packets = exports.packets = {
			open:     0    // non-ws
			, close:    1    // non-ws
			, ping:     2
			, pong:     3
			, message:  4
			, upgrade:  5
			, noop:     6
		};

		var packetslist = keys(packets);

		/**
		 * Premade error packet.
		 */

		var err = { type: 'error', data: 'parser error' };

		/**
		 * Create a blob api even for blob builder when vendor prefixes exist
		 */

		var Blob = require('blob');

		/**
		 * Encodes a packet.
		 *
		 *     <packet type id> [ <data> ]
		 *
		 * Example:
		 *
		 *     5hello world
		 *     3
		 *     4
		 *
		 * Binary is encoded in an identical principle
		 *
		 * @api private
		 */

		exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
			if ('function' == typeof supportsBinary) {
				callback = supportsBinary;
				supportsBinary = false;
			}

			if ('function' == typeof utf8encode) {
				callback = utf8encode;
				utf8encode = null;
			}

			var data = (packet.data === undefined)
				? undefined
				: packet.data.buffer || packet.data;

			if (global.ArrayBuffer && data instanceof ArrayBuffer) {
				return encodeArrayBuffer(packet, supportsBinary, callback);
			} else if (Blob && data instanceof global.Blob) {
				return encodeBlob(packet, supportsBinary, callback);
			}

			// might be an object with { base64: true, data: dataAsBase64String }
			if (data && data.base64) {
				return encodeBase64Object(packet, callback);
			}

			// Sending data as a utf-8 string
			var encoded = packets[packet.type];

			// data fragment is optional
			if (undefined !== packet.data) {
				encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
			}

			return callback('' + encoded);

		};

		function encodeBase64Object(packet, callback) {
			// packet data is an object { base64: true, data: dataAsBase64String }
			var message = 'b' + exports.packets[packet.type] + packet.data.data;
			return callback(message);
		}

		/**
		 * Encode packet helpers for binary types
		 */

		function encodeArrayBuffer(packet, supportsBinary, callback) {
			if (!supportsBinary) {
				return exports.encodeBase64Packet(packet, callback);
			}

			var data = packet.data;
			var contentArray = new Uint8Array(data);
			var resultBuffer = new Uint8Array(1 + data.byteLength);

			resultBuffer[0] = packets[packet.type];
			for (var i = 0; i < contentArray.length; i++) {
				resultBuffer[i+1] = contentArray[i];
			}

			return callback(resultBuffer.buffer);
		}

		function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
			if (!supportsBinary) {
				return exports.encodeBase64Packet(packet, callback);
			}

			var fr = new FileReader();
			fr.onload = function() {
				packet.data = fr.result;
				exports.encodePacket(packet, supportsBinary, true, callback);
			};
			return fr.readAsArrayBuffer(packet.data);
		}

		function encodeBlob(packet, supportsBinary, callback) {
			if (!supportsBinary) {
				return exports.encodeBase64Packet(packet, callback);
			}

			if (dontSendBlobs) {
				return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
			}

			var length = new Uint8Array(1);
			length[0] = packets[packet.type];
			var blob = new Blob([length.buffer, packet.data]);

			return callback(blob);
		}

		/**
		 * Encodes a packet with binary data in a base64 string
		 *
		 * @param {Object} packet, has `type` and `data`
		 * @return {String} base64 encoded message
		 */

		exports.encodeBase64Packet = function(packet, callback) {
			var message = 'b' + exports.packets[packet.type];
			if (Blob && packet.data instanceof Blob) {
				var fr = new FileReader();
				fr.onload = function() {
					var b64 = fr.result.split(',')[1];
					callback(message + b64);
				};
				return fr.readAsDataURL(packet.data);
			}

			var b64data;
			try {
				b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
			} catch (e) {
				// iPhone Safari doesn't let you apply with typed arrays
				var typed = new Uint8Array(packet.data);
				var basic = new Array(typed.length);
				for (var i = 0; i < typed.length; i++) {
					basic[i] = typed[i];
				}
				b64data = String.fromCharCode.apply(null, basic);
			}
			message += global.btoa(b64data);
			return callback(message);
		};

		/**
		 * Decodes a packet. Changes format to Blob if requested.
		 *
		 * @return {Object} with `type` and `data` (if any)
		 * @api private
		 */

		exports.decodePacket = function (data, binaryType, utf8decode) {
			// String data
			if (typeof data == 'string' || data === undefined) {
				if (data.charAt(0) == 'b') {
					return exports.decodeBase64Packet(data.substr(1), binaryType);
				}

				if (utf8decode) {
					try {
						data = utf8.decode(data);
					} catch (e) {
						return err;
					}
				}
				var type = data.charAt(0);

				if (Number(type) != type || !packetslist[type]) {
					return err;
				}

				if (data.length > 1) {
					return { type: packetslist[type], data: data.substring(1) };
				} else {
					return { type: packetslist[type] };
				}
			}

			var asArray = new Uint8Array(data);
			var type = asArray[0];
			var rest = sliceBuffer(data, 1);
			if (Blob && binaryType === 'blob') {
				rest = new Blob([rest]);
			}
			return { type: packetslist[type], data: rest };
		};

		/**
		 * Decodes a packet encoded in a base64 string
		 *
		 * @param {String} base64 encoded message
		 * @return {Object} with `type` and `data` (if any)
		 */

		exports.decodeBase64Packet = function(msg, binaryType) {
			var type = packetslist[msg.charAt(0)];
			if (!global.ArrayBuffer) {
				return { type: type, data: { base64: true, data: msg.substr(1) } };
			}

			var data = base64encoder.decode(msg.substr(1));

			if (binaryType === 'blob' && Blob) {
				data = new Blob([data]);
			}

			return { type: type, data: data };
		};

		/**
		 * Encodes multiple messages (payload).
		 *
		 *     <length>:data
		 *
		 * Example:
		 *
		 *     11:hello world2:hi
		 *
		 * If any contents are binary, they will be encoded as base64 strings. Base64
		 * encoded strings are marked with a b before the length specifier
		 *
		 * @param {Array} packets
		 * @api private
		 */

		exports.encodePayload = function (packets, supportsBinary, callback) {
			if (typeof supportsBinary == 'function') {
				callback = supportsBinary;
				supportsBinary = null;
			}

			var isBinary = hasBinary(packets);

			if (supportsBinary && isBinary) {
				if (Blob && !dontSendBlobs) {
					return exports.encodePayloadAsBlob(packets, callback);
				}

				return exports.encodePayloadAsArrayBuffer(packets, callback);
			}

			if (!packets.length) {
				return callback('0:');
			}

			function setLengthHeader(message) {
				return message.length + ':' + message;
			}

			function encodeOne(packet, doneCallback) {
				exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
					doneCallback(null, setLengthHeader(message));
				});
			}

			map(packets, encodeOne, function(err, results) {
				return callback(results.join(''));
			});
		};

		/**
		 * Async array map using after
		 */

		function map(ary, each, done) {
			var result = new Array(ary.length);
			var next = after(ary.length, done);

			var eachWithIndex = function(i, el, cb) {
				each(el, function(error, msg) {
					result[i] = msg;
					cb(error, result);
				});
			};

			for (var i = 0; i < ary.length; i++) {
				eachWithIndex(i, ary[i], next);
			}
		}

		/*
		 * Decodes data when a payload is maybe expected. Possible binary contents are
		 * decoded from their base64 representation
		 *
		 * @param {String} data, callback method
		 * @api public
		 */

		exports.decodePayload = function (data, binaryType, callback) {
			if (typeof data != 'string') {
				return exports.decodePayloadAsBinary(data, binaryType, callback);
			}

			if (typeof binaryType === 'function') {
				callback = binaryType;
				binaryType = null;
			}

			var packet;
			if (data == '') {
				// parser error - ignoring payload
				return callback(err, 0, 1);
			}

			var length = ''
				, n, msg;

			for (var i = 0, l = data.length; i < l; i++) {
				var chr = data.charAt(i);

				if (':' != chr) {
					length += chr;
				} else {
					if ('' == length || (length != (n = Number(length)))) {
						// parser error - ignoring payload
						return callback(err, 0, 1);
					}

					msg = data.substr(i + 1, n);

					if (length != msg.length) {
						// parser error - ignoring payload
						return callback(err, 0, 1);
					}

					if (msg.length) {
						packet = exports.decodePacket(msg, binaryType, true);

						if (err.type == packet.type && err.data == packet.data) {
							// parser error in individual packet - ignoring payload
							return callback(err, 0, 1);
						}

						var ret = callback(packet, i + n, l);
						if (false === ret) return;
					}

					// advance cursor
					i += n;
					length = '';
				}
			}

			if (length != '') {
				// parser error - ignoring payload
				return callback(err, 0, 1);
			}

		};

		/**
		 * Encodes multiple messages (payload) as binary.
		 *
		 * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
		 * 255><data>
		 *
		 * Example:
		 * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
		 *
		 * @param {Array} packets
		 * @return {ArrayBuffer} encoded payload
		 * @api private
		 */

		exports.encodePayloadAsArrayBuffer = function(packets, callback) {
			if (!packets.length) {
				return callback(new ArrayBuffer(0));
			}

			function encodeOne(packet, doneCallback) {
				exports.encodePacket(packet, true, true, function(data) {
					return doneCallback(null, data);
				});
			}

			map(packets, encodeOne, function(err, encodedPackets) {
				var totalLength = encodedPackets.reduce(function(acc, p) {
					var len;
					if (typeof p === 'string'){
						len = p.length;
					} else {
						len = p.byteLength;
					}
					return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
				}, 0);

				var resultArray = new Uint8Array(totalLength);

				var bufferIndex = 0;
				encodedPackets.forEach(function(p) {
					var isString = typeof p === 'string';
					var ab = p;
					if (isString) {
						var view = new Uint8Array(p.length);
						for (var i = 0; i < p.length; i++) {
							view[i] = p.charCodeAt(i);
						}
						ab = view.buffer;
					}

					if (isString) { // not true binary
						resultArray[bufferIndex++] = 0;
					} else { // true binary
						resultArray[bufferIndex++] = 1;
					}

					var lenStr = ab.byteLength.toString();
					for (var i = 0; i < lenStr.length; i++) {
						resultArray[bufferIndex++] = parseInt(lenStr[i]);
					}
					resultArray[bufferIndex++] = 255;

					var view = new Uint8Array(ab);
					for (var i = 0; i < view.length; i++) {
						resultArray[bufferIndex++] = view[i];
					}
				});

				return callback(resultArray.buffer);
			});
		};

		/**
		 * Encode as Blob
		 */

		exports.encodePayloadAsBlob = function(packets, callback) {
			function encodeOne(packet, doneCallback) {
				exports.encodePacket(packet, true, true, function(encoded) {
					var binaryIdentifier = new Uint8Array(1);
					binaryIdentifier[0] = 1;
					if (typeof encoded === 'string') {
						var view = new Uint8Array(encoded.length);
						for (var i = 0; i < encoded.length; i++) {
							view[i] = encoded.charCodeAt(i);
						}
						encoded = view.buffer;
						binaryIdentifier[0] = 0;
					}

					var len = (encoded instanceof ArrayBuffer)
						? encoded.byteLength
						: encoded.size;

					var lenStr = len.toString();
					var lengthAry = new Uint8Array(lenStr.length + 1);
					for (var i = 0; i < lenStr.length; i++) {
						lengthAry[i] = parseInt(lenStr[i]);
					}
					lengthAry[lenStr.length] = 255;

					if (Blob) {
						var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
						doneCallback(null, blob);
					}
				});
			}

			map(packets, encodeOne, function(err, results) {
				return callback(new Blob(results));
			});
		};

		/*
		 * Decodes data when a payload is maybe expected. Strings are decoded by
		 * interpreting each byte as a key code for entries marked to start with 0. See
		 * description of encodePayloadAsBinary
		 *
		 * @param {ArrayBuffer} data, callback method
		 * @api public
		 */

		exports.decodePayloadAsBinary = function (data, binaryType, callback) {
			if (typeof binaryType === 'function') {
				callback = binaryType;
				binaryType = null;
			}

			var bufferTail = data;
			var buffers = [];

			var numberTooLong = false;
			while (bufferTail.byteLength > 0) {
				var tailArray = new Uint8Array(bufferTail);
				var isString = tailArray[0] === 0;
				var msgLength = '';

				for (var i = 1; ; i++) {
					if (tailArray[i] == 255) break;

					if (msgLength.length > 310) {
						numberTooLong = true;
						break;
					}

					msgLength += tailArray[i];
				}

				if(numberTooLong) return callback(err, 0, 1);

				bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
				msgLength = parseInt(msgLength);

				var msg = sliceBuffer(bufferTail, 0, msgLength);
				if (isString) {
					try {
						msg = String.fromCharCode.apply(null, new Uint8Array(msg));
					} catch (e) {
						// iPhone Safari doesn't let you apply to typed arrays
						var typed = new Uint8Array(msg);
						msg = '';
						for (var i = 0; i < typed.length; i++) {
							msg += String.fromCharCode(typed[i]);
						}
					}
				}

				buffers.push(msg);
				bufferTail = sliceBuffer(bufferTail, msgLength);
			}

			var total = buffers.length;
			buffers.forEach(function(buffer, i) {
				callback(exports.decodePacket(buffer, binaryType, true), i, total);
			});
		};

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./keys":25,"after":1,"arraybuffer.slice":2,"base64-arraybuffer":5,"blob":6,"has-binary":41,"utf8":86}],25:[function(require,module,exports){

	/**
	 * Gets the keys for an object.
	 *
	 * @return {Array} keys
	 * @api private
	 */

	module.exports = Object.keys || function keys (obj){
			var arr = [];
			var has = Object.prototype.hasOwnProperty;

			for (var i in obj) {
				if (has.call(obj, i)) {
					arr.push(i);
				}
			}
			return arr;
		};

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

	function Sender(opts) {
		WildEmitter.call(this);
		var options = opts || {};
		this.config = {
			chunksize: 16384,
			pacing: 0
		};
		// set our config from options
		var item;
		for (item in options) {
			this.config[item] = options[item];
		}

		this.file = null;
		this.channel = null;
	}
	util.inherits(Sender, WildEmitter);

	Sender.prototype.send = function (file, channel) {
		var self = this;
		this.file = file;
		this.channel = channel;
		var usePoll = typeof channel.bufferedAmountLowThreshold !== 'number';
		var offset = 0;
		var sliceFile = function() {
			var reader = new window.FileReader();
			reader.onload = (function() {
				return function(e) {
					self.channel.send(e.target.result);
					self.emit('progress', offset, file.size, e.target.result);

					if (file.size > offset + e.target.result.byteLength) {
						if (usePoll) {
							window.setTimeout(sliceFile, self.config.pacing);
						} else if (channel.bufferedAmount <= channel.bufferedAmountLowThreshold) {
							window.setTimeout(sliceFile, 0);
						} else {
							// wait for bufferedAmountLow to fire
						}
					} else {
						self.emit('progress', file.size, file.size, null);
						self.emit('sentFile');
					}
					offset = offset + self.config.chunksize;
				};
			})(file);
			var slice = file.slice(offset, offset + self.config.chunksize);
			reader.readAsArrayBuffer(slice);
		};
		if (!usePoll) {
			channel.bufferedAmountLowThreshold = 8 * this.config.chunksize;
			channel.addEventListener('bufferedamountlow', sliceFile);
		}
		window.setTimeout(sliceFile, 0);
	};

	function Receiver() {
		WildEmitter.call(this);

		this.receiveBuffer = [];
		this.received = 0;
		this.metadata = {};
		this.channel = null;
	}
	util.inherits(Receiver, WildEmitter);

	Receiver.prototype.receive = function (metadata, channel) {
		var self = this;

		if (metadata) {
			this.metadata = metadata;
		}
		this.channel = channel;
		// chrome only supports arraybuffers and those make it easier to calc the hash
		channel.binaryType = 'arraybuffer';
		this.channel.onmessage = function (event) {
			var len = event.data.byteLength;
			self.received += len;
			self.receiveBuffer.push(event.data);

			self.emit('progress', self.received, self.metadata.size, event.data);
			if (self.received === self.metadata.size) {
				self.emit('receivedFile', new window.Blob(self.receiveBuffer), self.metadata);
				self.receiveBuffer = []; // discard receivebuffer
			} else if (self.received > self.metadata.size) {
				// FIXME
				console.error('received more than expected, discarding...');
				self.receiveBuffer = []; // just discard...

			}
		};
	};

	module.exports = {};
	module.exports.support = typeof window !== 'undefined' && window && window.File && window.FileReader && window.Blob;
	module.exports.Sender = Sender;
	module.exports.Receiver = Receiver;

},{"util":89,"wildemitter":100}],27:[function(require,module,exports){
// getScreenMedia helper by @HenrikJoreteg
	var getUserMedia = require('getusermedia');

// cache for constraints and callback
	var cache = {};

	module.exports = function (mode, constraints, cb) {
		var hasConstraints = arguments.length === 3;
		var callback = hasConstraints ? cb : constraints;
		var error;

		if (typeof window === 'undefined' || window.location.protocol === 'http:') {
			error = new Error('NavigatorUserMediaError');
			error.name = 'HTTPS_REQUIRED';
			return callback(error);
		}

		if (window.navigator.userAgent.match('Chrome')) {
			var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(\d+)\./)[1], 10);
			var maxver = 33;
			// Chrome 71 dropped support for "window.chrome.webstore;".
			var isCef = (chromever < 71) && !window.chrome.webstore;
			// "known" crash in chrome 34 and 35 on linux
			if (window.navigator.userAgent.match('Linux')) maxver = 35;

			// check that the extension is installed by looking for a
			// sessionStorage variable that contains the extension id
			// this has to be set after installation unless the contest
			// script does that
			if (sessionStorage.getScreenMediaJSExtensionId) {
				chrome.runtime.sendMessage(sessionStorage.getScreenMediaJSExtensionId,
					{type:'getScreen', id: 1}, null,
					function (data) {
						if (!data || data.sourceId === '') { // user canceled
							var error = new Error('NavigatorUserMediaError');
							error.name = 'PERMISSION_DENIED';
							callback(error);
						} else {
							constraints = (hasConstraints && constraints) || {audio: false, video: {
									mandatory: {
										chromeMediaSource: 'desktop',
										maxWidth: window.screen.width,
										maxHeight: window.screen.height,
										maxFrameRate: 3
									}
								}};
							constraints.video.mandatory.chromeMediaSourceId = data.sourceId;
							getUserMedia(constraints, callback);
						}
					}
				);
			} else if (window.cefGetScreenMedia) {
				//window.cefGetScreenMedia is experimental - may be removed without notice
				window.cefGetScreenMedia(function(sourceId) {
					if (!sourceId) {
						var error = new Error('cefGetScreenMediaError');
						error.name = 'CEF_GETSCREENMEDIA_CANCELED';
						callback(error);
					} else {
						constraints = (hasConstraints && constraints) || {audio: false, video: {
								mandatory: {
									chromeMediaSource: 'desktop',
									maxWidth: window.screen.width,
									maxHeight: window.screen.height,
									maxFrameRate: 3
								},
								optional: [
									{googLeakyBucket: true},
									{googTemporalLayeredScreencast: true}
								]
							}};
						constraints.video.mandatory.chromeMediaSourceId = sourceId;
						getUserMedia(constraints, callback);
					}
				});
			} else if (isCef || (chromever >= 26 && chromever <= maxver)) {
				// chrome 26 - chrome 33 way to do it -- requires bad chrome://flags
				// note: this is basically in maintenance mode and will go away soon
				constraints = (hasConstraints && constraints) || {
						video: {
							mandatory: {
								googLeakyBucket: true,
								maxWidth: window.screen.width,
								maxHeight: window.screen.height,
								maxFrameRate: 3,
								chromeMediaSource: 'screen'
							}
						}
					};
				getUserMedia(constraints, callback);
			} else {
				// chrome 34+ way requiring an extension
				var pending = window.setTimeout(function () {
					error = new Error('NavigatorUserMediaError');
					error.name = 'EXTENSION_UNAVAILABLE';
					return callback(error);
				}, 1000);
				cache[pending] = [callback, hasConstraints ? constraints : null];
				window.postMessage({ type: 'getScreen', id: pending }, '*');
			}
		} else if (window.navigator.userAgent.match('Firefox')) {
			var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
			if (ffver >= 52) {
				mode = mode || 'window';
				constraints = (hasConstraints && constraints) || {
					video: {
						mozMediaSource: mode,
						mediaSource: mode
					}
				};
				getUserMedia(constraints, function (err, stream) {
					callback(err, stream);
					if (err) {
						return;
					}
					// workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
					var lastTime = stream.currentTime;
					var polly = window.setInterval(function () {
						if (!stream) window.clearInterval(polly);
						if (stream.currentTime == lastTime) {
							window.clearInterval(polly);
							if (stream.onended) {
								stream.onended();
							}
						}
						lastTime = stream.currentTime;
					}, 500);
				});
			} else {
				error = new Error('NavigatorUserMediaError');
				error.name = 'FF52_REQUIRED';
				return callback(error);
			}
		}
	};

	typeof window !== 'undefined' && window.addEventListener('message', function (event) {
		if (event.origin != window.location.origin && !event.isTrusted) {
			return;
		}
		if (event.data.type == 'gotScreen' && cache[event.data.id]) {
			var data = cache[event.data.id];
			var constraints = data[1];
			var callback = data[0];
			delete cache[event.data.id];

			if (event.data.sourceId === '') { // user canceled
				var error = new Error('NavigatorUserMediaError');
				error.name = 'PERMISSION_DENIED';
				callback(error);
			} else {
				constraints = constraints || {audio: false, video: {
						mandatory: {
							chromeMediaSource: 'desktop',
							maxWidth: window.screen.width,
							maxHeight: window.screen.height,
							maxFrameRate: 3
						},
						optional: [
							{googLeakyBucket: true},
							{googTemporalLayeredScreencast: true}
						]
					}};
				constraints.video.mandatory.chromeMediaSourceId = event.data.sourceId;
				getUserMedia(constraints, callback);
			}
		} else if (event.data.type == 'getScreenPending') {
			window.clearTimeout(event.data.id);
		}
	});

},{"getusermedia":28}],28:[function(require,module,exports){
// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
	var adapter = require('webrtc-adapter');

	module.exports = function (constraints, cb) {
		var error;
		var haveOpts = arguments.length === 2;
		var defaultOpts = {video: true, audio: true};

		var denied = 'PermissionDeniedError';
		var altDenied = 'PERMISSION_DENIED';
		var notSatisfied = 'ConstraintNotSatisfiedError';

		// make constraints optional
		if (!haveOpts) {
			cb = constraints;
			constraints = defaultOpts;
		}

		// treat lack of browser support like an error
		if (typeof navigator === 'undefined' || !navigator.getUserMedia) {
			// throw proper error per spec
			error = new Error('MediaStreamError');
			error.name = 'NotSupportedError';

			// keep all callbacks async
			return setTimeout(function () {
				cb(error);
			}, 0);
		}

		// normalize error handling when no media types are requested
		if (!constraints.audio && !constraints.video) {
			error = new Error('MediaStreamError');
			error.name = 'NoMediaRequestedError';

			// keep all callbacks async
			return setTimeout(function () {
				cb(error);
			}, 0);
		}

		navigator.mediaDevices.getUserMedia(constraints)
			.then(function (stream) {
				cb(null, stream);
			}).catch(function (err) {
			var error;
			// coerce into an error object since FF gives us a string
			// there are only two valid names according to the spec
			// we coerce all non-denied to "constraint not satisfied".
			if (typeof err === 'string') {
				error = new Error('MediaStreamError');
				if (err === denied || err === altDenied) {
					error.name = denied;
				} else {
					error.name = notSatisfied;
				}
			} else {
				// if we get an error object make sure '.name' property is set
				// according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
				error = err;
				if (!error.name) {
					// this is likely chrome which
					// sets a property called "ERROR_DENIED" on the error object
					// if so we make sure to set a name
					if (error[denied]) {
						err.name = denied;
					} else {
						err.name = notSatisfied;
					}
				}
			}

			cb(error);
		});
	};

},{"webrtc-adapter":90}],29:[function(require,module,exports){
// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
	var adapter = require('webrtc-adapter');

	module.exports = function (constraints, cb) {
		var error;
		var haveOpts = arguments.length === 2;
		var defaultOpts = {video: true, audio: true};

		var denied = 'PermissionDeniedError';
		var altDenied = 'PERMISSION_DENIED';
		var notSatisfied = 'ConstraintNotSatisfiedError';

		// make constraints optional
		if (!haveOpts) {
			cb = constraints;
			constraints = defaultOpts;
		}

		// treat lack of browser support like an error
		if (typeof navigator === 'undefined' || !navigator.getUserMedia) {
			// throw proper error per spec
			error = new Error('MediaStreamError');
			error.name = 'NotSupportedError';

			// keep all callbacks async
			return setTimeout(function () {
				cb(error);
			}, 0);
		}

		// normalize error handling when no media types are requested
		if (!constraints.audio && !constraints.video) {
			error = new Error('MediaStreamError');
			error.name = 'NoMediaRequestedError';

			// keep all callbacks async
			return setTimeout(function () {
				cb(error);
			}, 0);
		}

		// testing support -- note: using the about:config pref is better
		// for Firefox 39+, this might get removed in the future
		if (localStorage && localStorage.useFirefoxFakeDevice === 'true') {
			constraints.fake = true;
		}

		navigator.mediaDevices.getUserMedia(constraints)
			.then(function (stream) {
				cb(null, stream);
			}).catch(function (err) {
			var error;
			// coerce into an error object since FF gives us a string
			// there are only two valid names according to the spec
			// we coerce all non-denied to "constraint not satisfied".
			if (typeof err === 'string') {
				error = new Error('MediaStreamError');
				if (err === denied || err === altDenied) {
					error.name = denied;
				} else {
					error.name = notSatisfied;
				}
			} else {
				// if we get an error object make sure '.name' property is set
				// according to spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermediaerror-and-navigatorusermediaerrorcallback
				error = err;
				if (!error.name) {
					// this is likely chrome which
					// sets a property called "ERROR_DENIED" on the error object
					// if so we make sure to set a name
					if (error[denied]) {
						err.name = denied;
					} else {
						err.name = notSatisfied;
					}
				}
			}

			cb(error);
		});
	};

},{"webrtc-adapter":30}],30:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */

	'use strict';

// Shimming starts here.
	(function() {
		// Utils.
		var logging = require('./utils').log;
		var browserDetails = require('./utils').browserDetails;
		// Export to the adapter global object visible in the browser.
		module.exports.browserDetails = browserDetails;
		module.exports.extractVersion = require('./utils').extractVersion;
		module.exports.disableLog = require('./utils').disableLog;

		// Uncomment the line below if you want logging to occur, including logging
		// for the switch statement below. Can also be turned on in the browser via
		// adapter.disableLog(false), but then logging from the switch statement below
		// will not appear.
		// require('./utils').disableLog(false);

		// Browser shims.
		var chromeShim = require('./chrome/chrome_shim') || null;
		var edgeShim = require('./edge/edge_shim') || null;
		var firefoxShim = require('./firefox/firefox_shim') || null;
		var safariShim = require('./safari/safari_shim') || null;

		// Shim browser if found.
		switch (browserDetails.browser) {
			case 'opera': // fallthrough as it uses chrome shims
			case 'chrome':
				if (!chromeShim || !chromeShim.shimPeerConnection) {
					logging('Chrome shim is not included in this adapter release.');
					return;
				}
				logging('adapter.js shimming chrome.');
				// Export to the adapter global object visible in the browser.
				module.exports.browserShim = chromeShim;

				chromeShim.shimGetUserMedia();
				chromeShim.shimMediaStream();
				chromeShim.shimSourceObject();
				chromeShim.shimPeerConnection();
				chromeShim.shimOnTrack();
				break;
			case 'firefox':
				if (!firefoxShim || !firefoxShim.shimPeerConnection) {
					logging('Firefox shim is not included in this adapter release.');
					return;
				}
				logging('adapter.js shimming firefox.');
				// Export to the adapter global object visible in the browser.
				module.exports.browserShim = firefoxShim;

				firefoxShim.shimGetUserMedia();
				firefoxShim.shimSourceObject();
				firefoxShim.shimPeerConnection();
				firefoxShim.shimOnTrack();
				break;
			case 'edge':
				if (!edgeShim || !edgeShim.shimPeerConnection) {
					logging('MS edge shim is not included in this adapter release.');
					return;
				}
				logging('adapter.js shimming edge.');
				// Export to the adapter global object visible in the browser.
				module.exports.browserShim = edgeShim;

				edgeShim.shimGetUserMedia();
				edgeShim.shimPeerConnection();
				break;
			case 'safari':
				if (!safariShim) {
					logging('Safari shim is not included in this adapter release.');
					return;
				}
				logging('adapter.js shimming safari.');
				// Export to the adapter global object visible in the browser.
				module.exports.browserShim = safariShim;

				safariShim.shimGetUserMedia();
				break;
			default:
				logging('Unsupported browser!');
		}
	})();

},{"./chrome/chrome_shim":31,"./edge/edge_shim":33,"./firefox/firefox_shim":35,"./safari/safari_shim":37,"./utils":38}],31:[function(require,module,exports){

	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';
	var logging = require('../utils.js').log;
	var browserDetails = require('../utils.js').browserDetails;

	var chromeShim = {
		shimMediaStream: function() {
			window.MediaStream = window.MediaStream || window.webkitMediaStream;
		},

		shimOnTrack: function() {
			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
				window.RTCPeerConnection.prototype)) {
				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
					get: function() {
						return this._ontrack;
					},
					set: function(f) {
						var self = this;
						if (this._ontrack) {
							this.removeEventListener('track', this._ontrack);
							this.removeEventListener('addstream', this._ontrackpoly);
						}
						this.addEventListener('track', this._ontrack = f);
						this.addEventListener('addstream', this._ontrackpoly = function(e) {
							// onaddstream does not fire when a track is added to an existing
							// stream. But stream.onaddtrack is implemented so we use that.
							e.stream.addEventListener('addtrack', function(te) {
								var event = new Event('track');
								event.track = te.track;
								event.receiver = {track: te.track};
								event.streams = [e.stream];
								self.dispatchEvent(event);
							});
							e.stream.getTracks().forEach(function(track) {
								var event = new Event('track');
								event.track = track;
								event.receiver = {track: track};
								event.streams = [e.stream];
								this.dispatchEvent(event);
							}.bind(this));
						}.bind(this));
					}
				});
			}
		},

		shimSourceObject: function() {
			if (typeof window === 'object') {
				if (window.HTMLMediaElement &&
					!('srcObject' in window.HTMLMediaElement.prototype)) {
					// Shim the srcObject property, once, when HTMLMediaElement is found.
					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
						get: function() {
							return this._srcObject;
						},
						set: function(stream) {
							var self = this;
							// Use _srcObject as a private property for this shim
							this._srcObject = stream;
							if (this.src) {
								URL.revokeObjectURL(this.src);
							}

							if (!stream) {
								this.src = '';
								return;
							}
							this.src = URL.createObjectURL(stream);
							// We need to recreate the blob url when a track is added or
							// removed. Doing it manually since we want to avoid a recursion.
							stream.addEventListener('addtrack', function() {
								if (self.src) {
									URL.revokeObjectURL(self.src);
								}
								self.src = URL.createObjectURL(stream);
							});
							stream.addEventListener('removetrack', function() {
								if (self.src) {
									URL.revokeObjectURL(self.src);
								}
								self.src = URL.createObjectURL(stream);
							});
						}
					});
				}
			}
		},

		shimPeerConnection: function() {
			// The RTCPeerConnection object.
			window.RTCPeerConnection = function(pcConfig, pcConstraints) {
				// Translate iceTransportPolicy to iceTransports,
				// see https://code.google.com/p/webrtc/issues/detail?id=4869
				logging('PeerConnection');
				if (pcConfig && pcConfig.iceTransportPolicy) {
					pcConfig.iceTransports = pcConfig.iceTransportPolicy;
				}

				var pc = new webkitRTCPeerConnection(pcConfig, pcConstraints);
				var origGetStats = pc.getStats.bind(pc);
				pc.getStats = function(selector, successCallback, errorCallback) {
					var self = this;
					var args = arguments;

					// If selector is a function then we are in the old style stats so just
					// pass back the original getStats format to avoid breaking old users.
					if (arguments.length > 0 && typeof selector === 'function') {
						return origGetStats(selector, successCallback);
					}

					var fixChromeStats_ = function(response) {
						var standardReport = {};
						var reports = response.result();
						reports.forEach(function(report) {
							var standardStats = {
								id: report.id,
								timestamp: report.timestamp,
								type: report.type
							};
							report.names().forEach(function(name) {
								standardStats[name] = report.stat(name);
							});
							standardReport[standardStats.id] = standardStats;
						});

						return standardReport;
					};

					// shim getStats with maplike support
					var makeMapStats = function(stats, legacyStats) {
						var map = new Map(Object.keys(stats).map(function(key) {
							return[key, stats[key]];
						}));
						legacyStats = legacyStats || stats;
						Object.keys(legacyStats).forEach(function(key) {
							map[key] = legacyStats[key];
						});
						return map;
					};

					if (arguments.length >= 2) {
						var successCallbackWrapper_ = function(response) {
							args[1](makeMapStats(fixChromeStats_(response)));
						};

						return origGetStats.apply(this, [successCallbackWrapper_,
							arguments[0]]);
					}

					// promise-support
					return new Promise(function(resolve, reject) {
						if (args.length === 1 && typeof selector === 'object') {
							origGetStats.apply(self, [
								function(response) {
									resolve(makeMapStats(fixChromeStats_(response)));
								}, reject]);
						} else {
							// Preserve legacy chrome stats only on legacy access of stats obj
							origGetStats.apply(self, [
								function(response) {
									resolve(makeMapStats(fixChromeStats_(response),
										response.result()));
								}, reject]);
						}
					}).then(successCallback, errorCallback);
				};

				return pc;
			};
			window.RTCPeerConnection.prototype = webkitRTCPeerConnection.prototype;

			// wrap static methods. Currently just generateCertificate.
			if (webkitRTCPeerConnection.generateCertificate) {
				Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
					get: function() {
						return webkitRTCPeerConnection.generateCertificate;
					}
				});
			}

			['createOffer', 'createAnswer'].forEach(function(method) {
				var nativeMethod = webkitRTCPeerConnection.prototype[method];
				webkitRTCPeerConnection.prototype[method] = function() {
					var self = this;
					if (arguments.length < 1 || (arguments.length === 1 &&
						typeof arguments[0] === 'object')) {
						var opts = arguments.length === 1 ? arguments[0] : undefined;
						return new Promise(function(resolve, reject) {
							nativeMethod.apply(self, [resolve, reject, opts]);
						});
					}
					return nativeMethod.apply(this, arguments);
				};
			});

			// add promise support -- natively available in Chrome 51
			if (browserDetails.version < 51) {
				['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
					.forEach(function(method) {
						var nativeMethod = webkitRTCPeerConnection.prototype[method];
						webkitRTCPeerConnection.prototype[method] = function() {
							var args = arguments;
							var self = this;
							var promise = new Promise(function(resolve, reject) {
								nativeMethod.apply(self, [args[0], resolve, reject]);
							});
							if (args.length < 2) {
								return promise;
							}
							return promise.then(function() {
									args[1].apply(null, []);
								},
								function(err) {
									if (args.length >= 3) {
										args[2].apply(null, [err]);
									}
								});
						};
					});
			}

			// support for addIceCandidate(null)
			var nativeAddIceCandidate =
				RTCPeerConnection.prototype.addIceCandidate;
			RTCPeerConnection.prototype.addIceCandidate = function() {
				return arguments[0] === null ? Promise.resolve()
					: nativeAddIceCandidate.apply(this, arguments);
			};

			// shim implicit creation of RTCSessionDescription/RTCIceCandidate
			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
				.forEach(function(method) {
					var nativeMethod = webkitRTCPeerConnection.prototype[method];
					webkitRTCPeerConnection.prototype[method] = function() {
						arguments[0] = new ((method === 'addIceCandidate') ?
							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
						return nativeMethod.apply(this, arguments);
					};
				});
		},

		// Attach a media stream to an element.
		attachMediaStream: function(element, stream) {
			logging('DEPRECATED, attachMediaStream will soon be removed.');
			if (browserDetails.version >= 43) {
				element.srcObject = stream;
			} else if (typeof element.src !== 'undefined') {
				element.src = URL.createObjectURL(stream);
			} else {
				logging('Error attaching stream to element.');
			}
		},

		reattachMediaStream: function(to, from) {
			logging('DEPRECATED, reattachMediaStream will soon be removed.');
			if (browserDetails.version >= 43) {
				to.srcObject = from.srcObject;
			} else {
				to.src = from.src;
			}
		}
	};


// Expose public methods.
	module.exports = {
		shimMediaStream: chromeShim.shimMediaStream,
		shimOnTrack: chromeShim.shimOnTrack,
		shimSourceObject: chromeShim.shimSourceObject,
		shimPeerConnection: chromeShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia'),
		attachMediaStream: chromeShim.attachMediaStream,
		reattachMediaStream: chromeShim.reattachMediaStream
	};

},{"../utils.js":38,"./getusermedia":32}],32:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';
	var logging = require('../utils.js').log;

// Expose public methods.
	module.exports = function() {
		var constraintsToChrome_ = function(c) {
			if (typeof c !== 'object' || c.mandatory || c.optional) {
				return c;
			}
			var cc = {};
			Object.keys(c).forEach(function(key) {
				if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
					return;
				}
				var r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};
				if (r.exact !== undefined && typeof r.exact === 'number') {
					r.min = r.max = r.exact;
				}
				var oldname_ = function(prefix, name) {
					if (prefix) {
						return prefix + name.charAt(0).toUpperCase() + name.slice(1);
					}
					return (name === 'deviceId') ? 'sourceId' : name;
				};
				if (r.ideal !== undefined) {
					cc.optional = cc.optional || [];
					var oc = {};
					if (typeof r.ideal === 'number') {
						oc[oldname_('min', key)] = r.ideal;
						cc.optional.push(oc);
						oc = {};
						oc[oldname_('max', key)] = r.ideal;
						cc.optional.push(oc);
					} else {
						oc[oldname_('', key)] = r.ideal;
						cc.optional.push(oc);
					}
				}
				if (r.exact !== undefined && typeof r.exact !== 'number') {
					cc.mandatory = cc.mandatory || {};
					cc.mandatory[oldname_('', key)] = r.exact;
				} else {
					['min', 'max'].forEach(function(mix) {
						if (r[mix] !== undefined) {
							cc.mandatory = cc.mandatory || {};
							cc.mandatory[oldname_(mix, key)] = r[mix];
						}
					});
				}
			});
			if (c.advanced) {
				cc.optional = (cc.optional || []).concat(c.advanced);
			}
			return cc;
		};

		var shimConstraints_ = function(constraints, func) {
			constraints = JSON.parse(JSON.stringify(constraints));
			if (constraints && constraints.audio) {
				constraints.audio = constraintsToChrome_(constraints.audio);
			}
			if (constraints && typeof constraints.video === 'object') {
				// Shim facingMode for mobile, where it defaults to "user".
				var face = constraints.video.facingMode;
				face = face && ((typeof face === 'object') ? face : {ideal: face});

				if ((face && (face.exact === 'user' || face.exact === 'environment' ||
					face.ideal === 'user' || face.ideal === 'environment')) &&
					!(navigator.mediaDevices.getSupportedConstraints &&
					navigator.mediaDevices.getSupportedConstraints().facingMode)) {
					delete constraints.video.facingMode;
					if (face.exact === 'environment' || face.ideal === 'environment') {
						// Look for "back" in label, or use last cam (typically back cam).
						return navigator.mediaDevices.enumerateDevices()
							.then(function(devices) {
								devices = devices.filter(function(d) {
									return d.kind === 'videoinput';
								});
								var back = devices.find(function(d) {
										return d.label.toLowerCase().indexOf('back') !== -1;
									}) || (devices.length && devices[devices.length - 1]);
								if (back) {
									constraints.video.deviceId = face.exact ? {exact: back.deviceId} :
										{ideal: back.deviceId};
								}
								constraints.video = constraintsToChrome_(constraints.video);
								logging('chrome: ' + JSON.stringify(constraints));
								return func(constraints);
							});
					}
				}
				constraints.video = constraintsToChrome_(constraints.video);
			}
			logging('chrome: ' + JSON.stringify(constraints));
			return func(constraints);
		};

		var shimError_ = function(e) {
			return {
				name: {
					PermissionDeniedError: 'NotAllowedError',
					ConstraintNotSatisfiedError: 'OverconstrainedError'
				}[e.name] || e.name,
				message: e.message,
				constraint: e.constraintName,
				toString: function() {
					return this.name + (this.message && ': ') + this.message;
				}
			};
		};

		var getUserMedia_ = function(constraints, onSuccess, onError) {
			shimConstraints_(constraints, function(c) {
				navigator.webkitGetUserMedia(c, onSuccess, function(e) {
					onError(shimError_(e));
				});
			});
		};

		navigator.getUserMedia = getUserMedia_;

		// Returns the result of getUserMedia as a Promise.
		var getUserMediaPromise_ = function(constraints) {
			return new Promise(function(resolve, reject) {
				navigator.getUserMedia(constraints, resolve, reject);
			});
		};

		if (!navigator.mediaDevices) {
			navigator.mediaDevices = {
				getUserMedia: getUserMediaPromise_,
				enumerateDevices: function() {
					return new Promise(function(resolve) {
						var kinds = {audio: 'audioinput', video: 'videoinput'};
						return MediaStreamTrack.getSources(function(devices) {
							resolve(devices.map(function(device) {
								return {label: device.label,
									kind: kinds[device.kind],
									deviceId: device.id,
									groupId: ''};
							}));
						});
					});
				}
			};
		}

		// A shim for getUserMedia method on the mediaDevices object.
		// TODO(KaptenJansson) remove once implemented in Chrome stable.
		if (!navigator.mediaDevices.getUserMedia) {
			navigator.mediaDevices.getUserMedia = function(constraints) {
				return getUserMediaPromise_(constraints);
			};
		} else {
			// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
			// function which returns a Promise, it does not accept spec-style
			// constraints.
			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
			bind(navigator.mediaDevices);
			navigator.mediaDevices.getUserMedia = function(cs) {
				return shimConstraints_(cs, function(c) {
					return origGetUserMedia(c).catch(function(e) {
						return Promise.reject(shimError_(e));
					});
				});
			};
		}

		// Dummy devicechange event methods.
		// TODO(KaptenJansson) remove once implemented in Chrome stable.
		if (typeof navigator.mediaDevices.addEventListener === 'undefined') {
			navigator.mediaDevices.addEventListener = function() {
				logging('Dummy mediaDevices.addEventListener called.');
			};
		}
		if (typeof navigator.mediaDevices.removeEventListener === 'undefined') {
			navigator.mediaDevices.removeEventListener = function() {
				logging('Dummy mediaDevices.removeEventListener called.');
			};
		}
	};

},{"../utils.js":38}],33:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var SDPUtils = require('sdp');
	var logging = require('../utils').log;

	var edgeShim = {
		shimPeerConnection: function() {
			if (window.RTCIceGatherer) {
				// ORTC defines an RTCIceCandidate object but no constructor.
				// Not implemented in Edge.
				if (!window.RTCIceCandidate) {
					window.RTCIceCandidate = function(args) {
						return args;
					};
				}
				// ORTC does not have a session description object but
				// other browsers (i.e. Chrome) that will support both PC and ORTC
				// in the future might have this defined already.
				if (!window.RTCSessionDescription) {
					window.RTCSessionDescription = function(args) {
						return args;
					};
				}
			}

			window.RTCPeerConnection = function(config) {
				var self = this;

				var _eventTarget = document.createDocumentFragment();
				['addEventListener', 'removeEventListener', 'dispatchEvent']
					.forEach(function(method) {
						self[method] = _eventTarget[method].bind(_eventTarget);
					});

				this.onicecandidate = null;
				this.onaddstream = null;
				this.ontrack = null;
				this.onremovestream = null;
				this.onsignalingstatechange = null;
				this.oniceconnectionstatechange = null;
				this.onnegotiationneeded = null;
				this.ondatachannel = null;

				this.localStreams = [];
				this.remoteStreams = [];
				this.getLocalStreams = function() {
					return self.localStreams;
				};
				this.getRemoteStreams = function() {
					return self.remoteStreams;
				};

				this.localDescription = new RTCSessionDescription({
					type: '',
					sdp: ''
				});
				this.remoteDescription = new RTCSessionDescription({
					type: '',
					sdp: ''
				});
				this.signalingState = 'stable';
				this.iceConnectionState = 'new';
				this.iceGatheringState = 'new';

				this.iceOptions = {
					gatherPolicy: 'all',
					iceServers: []
				};
				if (config && config.iceTransportPolicy) {
					switch (config.iceTransportPolicy) {
						case 'all':
						case 'relay':
							this.iceOptions.gatherPolicy = config.iceTransportPolicy;
							break;
						case 'none':
							// FIXME: remove once implementation and spec have added this.
							throw new TypeError('iceTransportPolicy "none" not supported');
						default:
							// don't set iceTransportPolicy.
							break;
					}
				}
				this.usingBundle = config && config.bundlePolicy === 'max-bundle';

				if (config && config.iceServers) {
					// Edge does not like
					// 1) stun:
					// 2) turn: that does not have all of turn:host:port?transport=udp
					var iceServers = JSON.parse(JSON.stringify(config.iceServers));
					this.iceOptions.iceServers = iceServers.filter(function(server) {
						if (server && server.urls) {
							var urls = server.urls;
							if (typeof urls === 'string') {
								urls = [urls];
							}
							urls = urls.filter(function(url) {
								return url.indexOf('turn:') === 0 &&
									url.indexOf('transport=udp') !== -1;
							})[0];
							return !!urls;
						}
						return false;
					});
				}

				// per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
				// everything that is needed to describe a SDP m-line.
				this.transceivers = [];

				// since the iceGatherer is currently created in createOffer but we
				// must not emit candidates until after setLocalDescription we buffer
				// them in this array.
				this._localIceCandidatesBuffer = [];
			};

			window.RTCPeerConnection.prototype._emitBufferedCandidates = function() {
				var self = this;
				var sections = SDPUtils.splitSections(self.localDescription.sdp);
				// FIXME: need to apply ice candidates in a way which is async but
				// in-order
				this._localIceCandidatesBuffer.forEach(function(event) {
					var end = !event.candidate || Object.keys(event.candidate).length === 0;
					if (end) {
						for (var j = 1; j < sections.length; j++) {
							if (sections[j].indexOf('\r\na=end-of-candidates\r\n') === -1) {
								sections[j] += 'a=end-of-candidates\r\n';
							}
						}
					} else if (event.candidate.candidate.indexOf('typ endOfCandidates')
						=== -1) {
						sections[event.candidate.sdpMLineIndex + 1] +=
							'a=' + event.candidate.candidate + '\r\n';
					}
					self.localDescription.sdp = sections.join('');
					self.dispatchEvent(event);
					if (self.onicecandidate !== null) {
						self.onicecandidate(event);
					}
					if (!event.candidate && self.iceGatheringState !== 'complete') {
						var complete = self.transceivers.every(function(transceiver) {
							return transceiver.iceGatherer &&
								transceiver.iceGatherer.state === 'completed';
						});
						if (complete) {
							self.iceGatheringState = 'complete';
						}
					}
				});
				this._localIceCandidatesBuffer = [];
			};

			window.RTCPeerConnection.prototype.addStream = function(stream) {
				// Clone is necessary for local demos mostly, attaching directly
				// to two different senders does not work (build 10547).
				this.localStreams.push(stream.clone());
				this._maybeFireNegotiationNeeded();
			};

			window.RTCPeerConnection.prototype.removeStream = function(stream) {
				var idx = this.localStreams.indexOf(stream);
				if (idx > -1) {
					this.localStreams.splice(idx, 1);
					this._maybeFireNegotiationNeeded();
				}
			};

			window.RTCPeerConnection.prototype.getSenders = function() {
				return this.transceivers.filter(function(transceiver) {
					return !!transceiver.rtpSender;
				})
					.map(function(transceiver) {
						return transceiver.rtpSender;
					});
			};

			window.RTCPeerConnection.prototype.getReceivers = function() {
				return this.transceivers.filter(function(transceiver) {
					return !!transceiver.rtpReceiver;
				})
					.map(function(transceiver) {
						return transceiver.rtpReceiver;
					});
			};

			// Determines the intersection of local and remote capabilities.
			window.RTCPeerConnection.prototype._getCommonCapabilities =
				function(localCapabilities, remoteCapabilities) {
					var commonCapabilities = {
						codecs: [],
						headerExtensions: [],
						fecMechanisms: []
					};
					localCapabilities.codecs.forEach(function(lCodec) {
						for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
							var rCodec = remoteCapabilities.codecs[i];
							if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
								lCodec.clockRate === rCodec.clockRate &&
								lCodec.numChannels === rCodec.numChannels) {
								// push rCodec so we reply with offerer payload type
								commonCapabilities.codecs.push(rCodec);

								// FIXME: also need to determine intersection between
								// .rtcpFeedback and .parameters
								break;
							}
						}
					});

					localCapabilities.headerExtensions
						.forEach(function(lHeaderExtension) {
							for (var i = 0; i < remoteCapabilities.headerExtensions.length;
								 i++) {
								var rHeaderExtension = remoteCapabilities.headerExtensions[i];
								if (lHeaderExtension.uri === rHeaderExtension.uri) {
									commonCapabilities.headerExtensions.push(rHeaderExtension);
									break;
								}
							}
						});

					// FIXME: fecMechanisms
					return commonCapabilities;
				};

			// Create ICE gatherer, ICE transport and DTLS transport.
			window.RTCPeerConnection.prototype._createIceAndDtlsTransports =
				function(mid, sdpMLineIndex) {
					var self = this;
					var iceGatherer = new RTCIceGatherer(self.iceOptions);
					var iceTransport = new RTCIceTransport(iceGatherer);
					iceGatherer.onlocalcandidate = function(evt) {
						var event = new Event('icecandidate');
						event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

						var cand = evt.candidate;
						var end = !cand || Object.keys(cand).length === 0;
						// Edge emits an empty object for RTCIceCandidateComplete‥
						if (end) {
							// polyfill since RTCIceGatherer.state is not implemented in
							// Edge 10547 yet.
							if (iceGatherer.state === undefined) {
								iceGatherer.state = 'completed';
							}

							// Emit a candidate with type endOfCandidates to make the samples
							// work. Edge requires addIceCandidate with this empty candidate
							// to start checking. The real solution is to signal
							// end-of-candidates to the other side when getting the null
							// candidate but some apps (like the samples) don't do that.
							event.candidate.candidate =
								'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
						} else {
							// RTCIceCandidate doesn't have a component, needs to be added
							cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
							event.candidate.candidate = SDPUtils.writeCandidate(cand);
						}

						// update local description.
						var sections = SDPUtils.splitSections(self.localDescription.sdp);
						if (event.candidate.candidate.indexOf('typ endOfCandidates')
							=== -1) {
							sections[event.candidate.sdpMLineIndex + 1] +=
								'a=' + event.candidate.candidate + '\r\n';
						} else {
							sections[event.candidate.sdpMLineIndex + 1] +=
								'a=end-of-candidates\r\n';
						}
						self.localDescription.sdp = sections.join('');

						var complete = self.transceivers.every(function(transceiver) {
							return transceiver.iceGatherer &&
								transceiver.iceGatherer.state === 'completed';
						});

						// Emit candidate if localDescription is set.
						// Also emits null candidate when all gatherers are complete.
						switch (self.iceGatheringState) {
							case 'new':
								self._localIceCandidatesBuffer.push(event);
								if (end && complete) {
									self._localIceCandidatesBuffer.push(
										new Event('icecandidate'));
								}
								break;
							case 'gathering':
								self._emitBufferedCandidates();
								self.dispatchEvent(event);
								if (self.onicecandidate !== null) {
									self.onicecandidate(event);
								}
								if (complete) {
									self.dispatchEvent(new Event('icecandidate'));
									if (self.onicecandidate !== null) {
										self.onicecandidate(new Event('icecandidate'));
									}
									self.iceGatheringState = 'complete';
								}
								break;
							case 'complete':
								// should not happen... currently!
								break;
							default: // no-op.
								break;
						}
					};
					iceTransport.onicestatechange = function() {
						self._updateConnectionState();
					};

					var dtlsTransport = new RTCDtlsTransport(iceTransport);
					dtlsTransport.ondtlsstatechange = function() {
						self._updateConnectionState();
					};
					dtlsTransport.onerror = function() {
						// onerror does not set state to failed by itself.
						dtlsTransport.state = 'failed';
						self._updateConnectionState();
					};

					return {
						iceGatherer: iceGatherer,
						iceTransport: iceTransport,
						dtlsTransport: dtlsTransport
					};
				};

			// Start the RTP Sender and Receiver for a transceiver.
			window.RTCPeerConnection.prototype._transceive = function(transceiver,
																	  send, recv) {
				var params = this._getCommonCapabilities(transceiver.localCapabilities,
					transceiver.remoteCapabilities);
				if (send && transceiver.rtpSender) {
					params.encodings = transceiver.sendEncodingParameters;
					params.rtcp = {
						cname: SDPUtils.localCName
					};
					if (transceiver.recvEncodingParameters.length) {
						params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
					}
					transceiver.rtpSender.send(params);
				}
				if (recv && transceiver.rtpReceiver) {
					params.encodings = transceiver.recvEncodingParameters;
					params.rtcp = {
						cname: transceiver.cname
					};
					if (transceiver.sendEncodingParameters.length) {
						params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
					}
					transceiver.rtpReceiver.receive(params);
				}
			};

			window.RTCPeerConnection.prototype.setLocalDescription =
				function(description) {
					var self = this;
					var sections;
					var sessionpart;
					if (description.type === 'offer') {
						// FIXME: What was the purpose of this empty if statement?
						// if (!this._pendingOffer) {
						// } else {
						if (this._pendingOffer) {
							// VERY limited support for SDP munging. Limited to:
							// * changing the order of codecs
							sections = SDPUtils.splitSections(description.sdp);
							sessionpart = sections.shift();
							sections.forEach(function(mediaSection, sdpMLineIndex) {
								var caps = SDPUtils.parseRtpParameters(mediaSection);
								self._pendingOffer[sdpMLineIndex].localCapabilities = caps;
							});
							this.transceivers = this._pendingOffer;
							delete this._pendingOffer;
						}
					} else if (description.type === 'answer') {
						sections = SDPUtils.splitSections(self.remoteDescription.sdp);
						sessionpart = sections.shift();
						var isIceLite = SDPUtils.matchPrefix(sessionpart,
								'a=ice-lite').length > 0;
						sections.forEach(function(mediaSection, sdpMLineIndex) {
							var transceiver = self.transceivers[sdpMLineIndex];
							var iceGatherer = transceiver.iceGatherer;
							var iceTransport = transceiver.iceTransport;
							var dtlsTransport = transceiver.dtlsTransport;
							var localCapabilities = transceiver.localCapabilities;
							var remoteCapabilities = transceiver.remoteCapabilities;
							var rejected = mediaSection.split('\n', 1)[0]
									.split(' ', 2)[1] === '0';

							if (!rejected) {
								var remoteIceParameters = SDPUtils.getIceParameters(
									mediaSection, sessionpart);
								if (isIceLite) {
									var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
										.map(function(cand) {
											return SDPUtils.parseCandidate(cand);
										})
										.filter(function(cand) {
											return cand.component === '1';
										});
									// ice-lite only includes host candidates in the SDP so we can
									// use setRemoteCandidates (which implies an
									// RTCIceCandidateComplete)
									if (cands.length) {
										iceTransport.setRemoteCandidates(cands);
									}
								}
								var remoteDtlsParameters = SDPUtils.getDtlsParameters(
									mediaSection, sessionpart);
								if (isIceLite) {
									remoteDtlsParameters.role = 'server';
								}

								if (!self.usingBundle || sdpMLineIndex === 0) {
									iceTransport.start(iceGatherer, remoteIceParameters,
										isIceLite ? 'controlling' : 'controlled');
									dtlsTransport.start(remoteDtlsParameters);
								}

								// Calculate intersection of capabilities.
								var params = self._getCommonCapabilities(localCapabilities,
									remoteCapabilities);

								// Start the RTCRtpSender. The RTCRtpReceiver for this
								// transceiver has already been started in setRemoteDescription.
								self._transceive(transceiver,
									params.codecs.length > 0,
									false);
							}
						});
					}

					this.localDescription = {
						type: description.type,
						sdp: description.sdp
					};
					switch (description.type) {
						case 'offer':
							this._updateSignalingState('have-local-offer');
							break;
						case 'answer':
							this._updateSignalingState('stable');
							break;
						default:
							throw new TypeError('unsupported type "' + description.type +
								'"');
					}

					// If a success callback was provided, emit ICE candidates after it
					// has been executed. Otherwise, emit callback after the Promise is
					// resolved.
					var hasCallback = arguments.length > 1 &&
						typeof arguments[1] === 'function';
					if (hasCallback) {
						var cb = arguments[1];
						window.setTimeout(function() {
							cb();
							if (self.iceGatheringState === 'new') {
								self.iceGatheringState = 'gathering';
							}
							self._emitBufferedCandidates();
						}, 0);
					}
					var p = Promise.resolve();
					p.then(function() {
						if (!hasCallback) {
							if (self.iceGatheringState === 'new') {
								self.iceGatheringState = 'gathering';
							}
							// Usually candidates will be emitted earlier.
							window.setTimeout(self._emitBufferedCandidates.bind(self), 500);
						}
					});
					return p;
				};

			window.RTCPeerConnection.prototype.setRemoteDescription =
				function(description) {
					var self = this;
					var stream = new MediaStream();
					var receiverList = [];
					var sections = SDPUtils.splitSections(description.sdp);
					var sessionpart = sections.shift();
					var isIceLite = SDPUtils.matchPrefix(sessionpart,
							'a=ice-lite').length > 0;
					this.usingBundle = SDPUtils.matchPrefix(sessionpart,
							'a=group:BUNDLE ').length > 0;
					sections.forEach(function(mediaSection, sdpMLineIndex) {
						var lines = SDPUtils.splitLines(mediaSection);
						var mline = lines[0].substr(2).split(' ');
						var kind = mline[0];
						var rejected = mline[1] === '0';
						var direction = SDPUtils.getDirection(mediaSection, sessionpart);

						var transceiver;
						var iceGatherer;
						var iceTransport;
						var dtlsTransport;
						var rtpSender;
						var rtpReceiver;
						var sendEncodingParameters;
						var recvEncodingParameters;
						var localCapabilities;

						var track;
						// FIXME: ensure the mediaSection has rtcp-mux set.
						var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
						var remoteIceParameters;
						var remoteDtlsParameters;
						if (!rejected) {
							remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
								sessionpart);
							remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
								sessionpart);
							remoteDtlsParameters.role = 'client';
						}
						recvEncodingParameters =
							SDPUtils.parseRtpEncodingParameters(mediaSection);

						var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:');
						if (mid.length) {
							mid = mid[0].substr(6);
						} else {
							mid = SDPUtils.generateIdentifier();
						}

						var cname;
						// Gets the first SSRC. Note that with RTX there might be multiple
						// SSRCs.
						var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
							.map(function(line) {
								return SDPUtils.parseSsrcMedia(line);
							})
							.filter(function(obj) {
								return obj.attribute === 'cname';
							})[0];
						if (remoteSsrc) {
							cname = remoteSsrc.value;
						}

						var isComplete = SDPUtils.matchPrefix(mediaSection,
								'a=end-of-candidates').length > 0;
						var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
							.map(function(cand) {
								return SDPUtils.parseCandidate(cand);
							})
							.filter(function(cand) {
								return cand.component === '1';
							});
						if (description.type === 'offer' && !rejected) {
							var transports = self.usingBundle && sdpMLineIndex > 0 ? {
									iceGatherer: self.transceivers[0].iceGatherer,
									iceTransport: self.transceivers[0].iceTransport,
									dtlsTransport: self.transceivers[0].dtlsTransport
								} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);

							if (isComplete) {
								transports.iceTransport.setRemoteCandidates(cands);
							}

							localCapabilities = RTCRtpReceiver.getCapabilities(kind);
							sendEncodingParameters = [{
								ssrc: (2 * sdpMLineIndex + 2) * 1001
							}];

							rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);

							track = rtpReceiver.track;
							receiverList.push([track, rtpReceiver]);
							// FIXME: not correct when there are multiple streams but that is
							// not currently supported in this shim.
							stream.addTrack(track);

							// FIXME: look at direction.
							if (self.localStreams.length > 0 &&
								self.localStreams[0].getTracks().length >= sdpMLineIndex) {
								// FIXME: actually more complicated, needs to match types etc
								var localtrack = self.localStreams[0]
									.getTracks()[sdpMLineIndex];
								rtpSender = new RTCRtpSender(localtrack,
									transports.dtlsTransport);
							}

							self.transceivers[sdpMLineIndex] = {
								iceGatherer: transports.iceGatherer,
								iceTransport: transports.iceTransport,
								dtlsTransport: transports.dtlsTransport,
								localCapabilities: localCapabilities,
								remoteCapabilities: remoteCapabilities,
								rtpSender: rtpSender,
								rtpReceiver: rtpReceiver,
								kind: kind,
								mid: mid,
								cname: cname,
								sendEncodingParameters: sendEncodingParameters,
								recvEncodingParameters: recvEncodingParameters
							};
							// Start the RTCRtpReceiver now. The RTPSender is started in
							// setLocalDescription.
							self._transceive(self.transceivers[sdpMLineIndex],
								false,
								direction === 'sendrecv' || direction === 'sendonly');
						} else if (description.type === 'answer' && !rejected) {
							transceiver = self.transceivers[sdpMLineIndex];
							iceGatherer = transceiver.iceGatherer;
							iceTransport = transceiver.iceTransport;
							dtlsTransport = transceiver.dtlsTransport;
							rtpSender = transceiver.rtpSender;
							rtpReceiver = transceiver.rtpReceiver;
							sendEncodingParameters = transceiver.sendEncodingParameters;
							localCapabilities = transceiver.localCapabilities;

							self.transceivers[sdpMLineIndex].recvEncodingParameters =
								recvEncodingParameters;
							self.transceivers[sdpMLineIndex].remoteCapabilities =
								remoteCapabilities;
							self.transceivers[sdpMLineIndex].cname = cname;

							if ((isIceLite || isComplete) && cands.length) {
								iceTransport.setRemoteCandidates(cands);
							}
							if (!self.usingBundle || sdpMLineIndex === 0) {
								iceTransport.start(iceGatherer, remoteIceParameters,
									'controlling');
								dtlsTransport.start(remoteDtlsParameters);
							}

							self._transceive(transceiver,
								direction === 'sendrecv' || direction === 'recvonly',
								direction === 'sendrecv' || direction === 'sendonly');

							if (rtpReceiver &&
								(direction === 'sendrecv' || direction === 'sendonly')) {
								track = rtpReceiver.track;
								receiverList.push([track, rtpReceiver]);
								stream.addTrack(track);
							} else {
								// FIXME: actually the receiver should be created later.
								delete transceiver.rtpReceiver;
							}
						}
					});

					this.remoteDescription = {
						type: description.type,
						sdp: description.sdp
					};
					switch (description.type) {
						case 'offer':
							this._updateSignalingState('have-remote-offer');
							break;
						case 'answer':
							this._updateSignalingState('stable');
							break;
						default:
							throw new TypeError('unsupported type "' + description.type +
								'"');
					}
					if (stream.getTracks().length) {
						self.remoteStreams.push(stream);
						window.setTimeout(function() {
							var event = new Event('addstream');
							event.stream = stream;
							self.dispatchEvent(event);
							if (self.onaddstream !== null) {
								window.setTimeout(function() {
									self.onaddstream(event);
								}, 0);
							}

							receiverList.forEach(function(item) {
								var track = item[0];
								var receiver = item[1];
								var trackEvent = new Event('track');
								trackEvent.track = track;
								trackEvent.receiver = receiver;
								trackEvent.streams = [stream];
								self.dispatchEvent(event);
								if (self.ontrack !== null) {
									window.setTimeout(function() {
										self.ontrack(trackEvent);
									}, 0);
								}
							});
						}, 0);
					}
					if (arguments.length > 1 && typeof arguments[1] === 'function') {
						window.setTimeout(arguments[1], 0);
					}
					return Promise.resolve();
				};

			window.RTCPeerConnection.prototype.close = function() {
				this.transceivers.forEach(function(transceiver) {
					/* not yet
					 if (transceiver.iceGatherer) {
					 transceiver.iceGatherer.close();
					 }
					 */
					if (transceiver.iceTransport) {
						transceiver.iceTransport.stop();
					}
					if (transceiver.dtlsTransport) {
						transceiver.dtlsTransport.stop();
					}
					if (transceiver.rtpSender) {
						transceiver.rtpSender.stop();
					}
					if (transceiver.rtpReceiver) {
						transceiver.rtpReceiver.stop();
					}
				});
				// FIXME: clean up tracks, local streams, remote streams, etc
				this._updateSignalingState('closed');
			};

			// Update the signaling state.
			window.RTCPeerConnection.prototype._updateSignalingState =
				function(newState) {
					this.signalingState = newState;
					var event = new Event('signalingstatechange');
					this.dispatchEvent(event);
					if (this.onsignalingstatechange !== null) {
						this.onsignalingstatechange(event);
					}
				};

			// Determine whether to fire the negotiationneeded event.
			window.RTCPeerConnection.prototype._maybeFireNegotiationNeeded =
				function() {
					// Fire away (for now).
					var event = new Event('negotiationneeded');
					this.dispatchEvent(event);
					if (this.onnegotiationneeded !== null) {
						this.onnegotiationneeded(event);
					}
				};

			// Update the connection state.
			window.RTCPeerConnection.prototype._updateConnectionState = function() {
				var self = this;
				var newState;
				var states = {
					'new': 0,
					closed: 0,
					connecting: 0,
					checking: 0,
					connected: 0,
					completed: 0,
					failed: 0
				};
				this.transceivers.forEach(function(transceiver) {
					states[transceiver.iceTransport.state]++;
					states[transceiver.dtlsTransport.state]++;
				});
				// ICETransport.completed and connected are the same for this purpose.
				states.connected += states.completed;

				newState = 'new';
				if (states.failed > 0) {
					newState = 'failed';
				} else if (states.connecting > 0 || states.checking > 0) {
					newState = 'connecting';
				} else if (states.disconnected > 0) {
					newState = 'disconnected';
				} else if (states.new > 0) {
					newState = 'new';
				} else if (states.connected > 0 || states.completed > 0) {
					newState = 'connected';
				}

				if (newState !== self.iceConnectionState) {
					self.iceConnectionState = newState;
					var event = new Event('iceconnectionstatechange');
					this.dispatchEvent(event);
					if (this.oniceconnectionstatechange !== null) {
						this.oniceconnectionstatechange(event);
					}
				}
			};

			window.RTCPeerConnection.prototype.createOffer = function() {
				var self = this;
				if (this._pendingOffer) {
					throw new Error('createOffer called while there is a pending offer.');
				}
				var offerOptions;
				if (arguments.length === 1 && typeof arguments[0] !== 'function') {
					offerOptions = arguments[0];
				} else if (arguments.length === 3) {
					offerOptions = arguments[2];
				}

				var tracks = [];
				var numAudioTracks = 0;
				var numVideoTracks = 0;
				// Default to sendrecv.
				if (this.localStreams.length) {
					numAudioTracks = this.localStreams[0].getAudioTracks().length;
					numVideoTracks = this.localStreams[0].getVideoTracks().length;
				}
				// Determine number of audio and video tracks we need to send/recv.
				if (offerOptions) {
					// Reject Chrome legacy constraints.
					if (offerOptions.mandatory || offerOptions.optional) {
						throw new TypeError(
							'Legacy mandatory/optional constraints not supported.');
					}
					if (offerOptions.offerToReceiveAudio !== undefined) {
						numAudioTracks = offerOptions.offerToReceiveAudio;
					}
					if (offerOptions.offerToReceiveVideo !== undefined) {
						numVideoTracks = offerOptions.offerToReceiveVideo;
					}
				}
				if (this.localStreams.length) {
					// Push local streams.
					this.localStreams[0].getTracks().forEach(function(track) {
						tracks.push({
							kind: track.kind,
							track: track,
							wantReceive: track.kind === 'audio' ?
								numAudioTracks > 0 : numVideoTracks > 0
						});
						if (track.kind === 'audio') {
							numAudioTracks--;
						} else if (track.kind === 'video') {
							numVideoTracks--;
						}
					});
				}
				// Create M-lines for recvonly streams.
				while (numAudioTracks > 0 || numVideoTracks > 0) {
					if (numAudioTracks > 0) {
						tracks.push({
							kind: 'audio',
							wantReceive: true
						});
						numAudioTracks--;
					}
					if (numVideoTracks > 0) {
						tracks.push({
							kind: 'video',
							wantReceive: true
						});
						numVideoTracks--;
					}
				}

				var sdp = SDPUtils.writeSessionBoilerplate();
				var transceivers = [];
				tracks.forEach(function(mline, sdpMLineIndex) {
					// For each track, create an ice gatherer, ice transport,
					// dtls transport, potentially rtpsender and rtpreceiver.
					var track = mline.track;
					var kind = mline.kind;
					var mid = SDPUtils.generateIdentifier();

					var transports = self.usingBundle && sdpMLineIndex > 0 ? {
							iceGatherer: transceivers[0].iceGatherer,
							iceTransport: transceivers[0].iceTransport,
							dtlsTransport: transceivers[0].dtlsTransport
						} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);

					var localCapabilities = RTCRtpSender.getCapabilities(kind);
					var rtpSender;
					var rtpReceiver;

					// generate an ssrc now, to be used later in rtpSender.send
					var sendEncodingParameters = [{
						ssrc: (2 * sdpMLineIndex + 1) * 1001
					}];
					if (track) {
						rtpSender = new RTCRtpSender(track, transports.dtlsTransport);
					}

					if (mline.wantReceive) {
						rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
					}

					transceivers[sdpMLineIndex] = {
						iceGatherer: transports.iceGatherer,
						iceTransport: transports.iceTransport,
						dtlsTransport: transports.dtlsTransport,
						localCapabilities: localCapabilities,
						remoteCapabilities: null,
						rtpSender: rtpSender,
						rtpReceiver: rtpReceiver,
						kind: kind,
						mid: mid,
						sendEncodingParameters: sendEncodingParameters,
						recvEncodingParameters: null
					};
				});
				if (this.usingBundle) {
					sdp += 'a=group:BUNDLE ' + transceivers.map(function(t) {
							return t.mid;
						}).join(' ') + '\r\n';
				}
				tracks.forEach(function(mline, sdpMLineIndex) {
					var transceiver = transceivers[sdpMLineIndex];
					sdp += SDPUtils.writeMediaSection(transceiver,
						transceiver.localCapabilities, 'offer', self.localStreams[0]);
				});

				this._pendingOffer = transceivers;
				var desc = new RTCSessionDescription({
					type: 'offer',
					sdp: sdp
				});
				if (arguments.length && typeof arguments[0] === 'function') {
					window.setTimeout(arguments[0], 0, desc);
				}
				return Promise.resolve(desc);
			};

			window.RTCPeerConnection.prototype.createAnswer = function() {
				var self = this;

				var sdp = SDPUtils.writeSessionBoilerplate();
				if (this.usingBundle) {
					sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) {
							return t.mid;
						}).join(' ') + '\r\n';
				}
				this.transceivers.forEach(function(transceiver) {
					// Calculate intersection of capabilities.
					var commonCapabilities = self._getCommonCapabilities(
						transceiver.localCapabilities,
						transceiver.remoteCapabilities);

					sdp += SDPUtils.writeMediaSection(transceiver, commonCapabilities,
						'answer', self.localStreams[0]);
				});

				var desc = new RTCSessionDescription({
					type: 'answer',
					sdp: sdp
				});
				if (arguments.length && typeof arguments[0] === 'function') {
					window.setTimeout(arguments[0], 0, desc);
				}
				return Promise.resolve(desc);
			};

			window.RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
				if (candidate === null) {
					this.transceivers.forEach(function(transceiver) {
						transceiver.iceTransport.addRemoteCandidate({});
					});
				} else {
					var mLineIndex = candidate.sdpMLineIndex;
					if (candidate.sdpMid) {
						for (var i = 0; i < this.transceivers.length; i++) {
							if (this.transceivers[i].mid === candidate.sdpMid) {
								mLineIndex = i;
								break;
							}
						}
					}
					var transceiver = this.transceivers[mLineIndex];
					if (transceiver) {
						var cand = Object.keys(candidate.candidate).length > 0 ?
							SDPUtils.parseCandidate(candidate.candidate) : {};
						// Ignore Chrome's invalid candidates since Edge does not like them.
						if (cand.protocol === 'tcp' && cand.port === 0) {
							return;
						}
						// Ignore RTCP candidates, we assume RTCP-MUX.
						if (cand.component !== '1') {
							return;
						}
						// A dirty hack to make samples work.
						if (cand.type === 'endOfCandidates') {
							cand = {};
						}
						transceiver.iceTransport.addRemoteCandidate(cand);

						// update the remoteDescription.
						var sections = SDPUtils.splitSections(this.remoteDescription.sdp);
						sections[mLineIndex + 1] += (cand.type ? candidate.candidate.trim()
								: 'a=end-of-candidates') + '\r\n';
						this.remoteDescription.sdp = sections.join('');
					}
				}
				if (arguments.length > 1 && typeof arguments[1] === 'function') {
					window.setTimeout(arguments[1], 0);
				}
				return Promise.resolve();
			};

			window.RTCPeerConnection.prototype.getStats = function() {
				var promises = [];
				this.transceivers.forEach(function(transceiver) {
					['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
						'dtlsTransport'].forEach(function(method) {
						if (transceiver[method]) {
							promises.push(transceiver[method].getStats());
						}
					});
				});
				var cb = arguments.length > 1 && typeof arguments[1] === 'function' &&
					arguments[1];
				return new Promise(function(resolve) {
					// shim getStats with maplike support
					var results = new Map();
					Promise.all(promises).then(function(res) {
						res.forEach(function(result) {
							Object.keys(result).forEach(function(id) {
								results.set(id, result[id]);
								results[id] = result[id];
							});
						});
						if (cb) {
							window.setTimeout(cb, 0, results);
						}
						resolve(results);
					});
				});
			};
		},

		// Attach a media stream to an element.
		attachMediaStream: function(element, stream) {
			logging('DEPRECATED, attachMediaStream will soon be removed.');
			element.srcObject = stream;
		},

		reattachMediaStream: function(to, from) {
			logging('DEPRECATED, reattachMediaStream will soon be removed.');
			to.srcObject = from.srcObject;
		}
	};

// Expose public methods.
	module.exports = {
		shimPeerConnection: edgeShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia'),
		attachMediaStream: edgeShim.attachMediaStream,
		reattachMediaStream: edgeShim.reattachMediaStream
	};

},{"../utils":38,"./getusermedia":34,"sdp":62}],34:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

// Expose public methods.
	module.exports = function() {
		var shimError_ = function(e) {
			return {
				name: {PermissionDeniedError: 'NotAllowedError'}[e.name] || e.name,
				message: e.message,
				constraint: e.constraint,
				toString: function() {
					return this.name;
				}
			};
		};

		// getUserMedia error shim.
		var origGetUserMedia = navigator.mediaDevices.getUserMedia.
		bind(navigator.mediaDevices);
		navigator.mediaDevices.getUserMedia = function(c) {
			return origGetUserMedia(c).catch(function(e) {
				return Promise.reject(shimError_(e));
			});
		};
	};

},{}],35:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var logging = require('../utils').log;
	var browserDetails = require('../utils').browserDetails;

	var firefoxShim = {
		shimOnTrack: function() {
			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
				window.RTCPeerConnection.prototype)) {
				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
					get: function() {
						return this._ontrack;
					},
					set: function(f) {
						if (this._ontrack) {
							this.removeEventListener('track', this._ontrack);
							this.removeEventListener('addstream', this._ontrackpoly);
						}
						this.addEventListener('track', this._ontrack = f);
						this.addEventListener('addstream', this._ontrackpoly = function(e) {
							e.stream.getTracks().forEach(function(track) {
								var event = new Event('track');
								event.track = track;
								event.receiver = {track: track};
								event.streams = [e.stream];
								this.dispatchEvent(event);
							}.bind(this));
						}.bind(this));
					}
				});
			}
		},

		shimSourceObject: function() {
			// Firefox has supported mozSrcObject since FF22, unprefixed in 42.
			if (typeof window === 'object') {
				if (window.HTMLMediaElement &&
					!('srcObject' in window.HTMLMediaElement.prototype)) {
					// Shim the srcObject property, once, when HTMLMediaElement is found.
					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
						get: function() {
							return this.mozSrcObject;
						},
						set: function(stream) {
							this.mozSrcObject = stream;
						}
					});
				}
			}
		},

		shimPeerConnection: function() {
			if (typeof window !== 'object' || !(window.RTCPeerConnection ||
				window.mozRTCPeerConnection)) {
				return; // probably media.peerconnection.enabled=false in about:config
			}
			// The RTCPeerConnection object.
			if (!window.RTCPeerConnection) {
				window.RTCPeerConnection = function(pcConfig, pcConstraints) {
					if (browserDetails.version < 38) {
						// .urls is not supported in FF < 38.
						// create RTCIceServers with a single url.
						if (pcConfig && pcConfig.iceServers) {
							var newIceServers = [];
							for (var i = 0; i < pcConfig.iceServers.length; i++) {
								var server = pcConfig.iceServers[i];
								if (server.hasOwnProperty('urls')) {
									for (var j = 0; j < server.urls.length; j++) {
										var newServer = {
											url: server.urls[j]
										};
										if (server.urls[j].indexOf('turn') === 0) {
											newServer.username = server.username;
											newServer.credential = server.credential;
										}
										newIceServers.push(newServer);
									}
								} else {
									newIceServers.push(pcConfig.iceServers[i]);
								}
							}
							pcConfig.iceServers = newIceServers;
						}
					}
					return new mozRTCPeerConnection(pcConfig, pcConstraints);
				};
				window.RTCPeerConnection.prototype = mozRTCPeerConnection.prototype;

				// wrap static methods. Currently just generateCertificate.
				if (mozRTCPeerConnection.generateCertificate) {
					Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
						get: function() {
							return mozRTCPeerConnection.generateCertificate;
						}
					});
				}

				window.RTCSessionDescription = mozRTCSessionDescription;
				window.RTCIceCandidate = mozRTCIceCandidate;
			}

			// shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
				.forEach(function(method) {
					var nativeMethod = RTCPeerConnection.prototype[method];
					RTCPeerConnection.prototype[method] = function() {
						arguments[0] = new ((method === 'addIceCandidate') ?
							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
						return nativeMethod.apply(this, arguments);
					};
				});

			// support for addIceCandidate(null)
			var nativeAddIceCandidate =
				RTCPeerConnection.prototype.addIceCandidate;
			RTCPeerConnection.prototype.addIceCandidate = function() {
				return arguments[0] === null ? Promise.resolve()
					: nativeAddIceCandidate.apply(this, arguments);
			};

			// shim getStats with maplike support
			var makeMapStats = function(stats) {
				var map = new Map();
				Object.keys(stats).forEach(function(key) {
					map.set(key, stats[key]);
					map[key] = stats[key];
				});
				return map;
			};

			var nativeGetStats = RTCPeerConnection.prototype.getStats;
			RTCPeerConnection.prototype.getStats = function(selector, onSucc, onErr) {
				return nativeGetStats.apply(this, [selector || null])
					.then(function(stats) {
						return makeMapStats(stats);
					})
					.then(onSucc, onErr);
			};
		},

		// Attach a media stream to an element.
		attachMediaStream: function(element, stream) {
			logging('DEPRECATED, attachMediaStream will soon be removed.');
			element.srcObject = stream;
		},

		reattachMediaStream: function(to, from) {
			logging('DEPRECATED, reattachMediaStream will soon be removed.');
			to.srcObject = from.srcObject;
		}
	};

// Expose public methods.
	module.exports = {
		shimOnTrack: firefoxShim.shimOnTrack,
		shimSourceObject: firefoxShim.shimSourceObject,
		shimPeerConnection: firefoxShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia'),
		attachMediaStream: firefoxShim.attachMediaStream,
		reattachMediaStream: firefoxShim.reattachMediaStream
	};

},{"../utils":38,"./getusermedia":36}],36:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var logging = require('../utils').log;
	var browserDetails = require('../utils').browserDetails;

// Expose public methods.
	module.exports = function() {
		var shimError_ = function(e) {
			return {
				name: {
					SecurityError: 'NotAllowedError',
					PermissionDeniedError: 'NotAllowedError'
				}[e.name] || e.name,
				message: {
					'The operation is insecure.': 'The request is not allowed by the ' +
					'user agent or the platform in the current context.'
				}[e.message] || e.message,
				constraint: e.constraint,
				toString: function() {
					return this.name + (this.message && ': ') + this.message;
				}
			};
		};

		// getUserMedia constraints shim.
		var getUserMedia_ = function(constraints, onSuccess, onError) {
			var constraintsToFF37_ = function(c) {
				if (typeof c !== 'object' || c.require) {
					return c;
				}
				var require = [];
				Object.keys(c).forEach(function(key) {
					if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
						return;
					}
					var r = c[key] = (typeof c[key] === 'object') ?
						c[key] : {ideal: c[key]};
					if (r.min !== undefined ||
						r.max !== undefined || r.exact !== undefined) {
						require.push(key);
					}
					if (r.exact !== undefined) {
						if (typeof r.exact === 'number') {
							r. min = r.max = r.exact;
						} else {
							c[key] = r.exact;
						}
						delete r.exact;
					}
					if (r.ideal !== undefined) {
						c.advanced = c.advanced || [];
						var oc = {};
						if (typeof r.ideal === 'number') {
							oc[key] = {min: r.ideal, max: r.ideal};
						} else {
							oc[key] = r.ideal;
						}
						c.advanced.push(oc);
						delete r.ideal;
						if (!Object.keys(r).length) {
							delete c[key];
						}
					}
				});
				if (require.length) {
					c.require = require;
				}
				return c;
			};
			constraints = JSON.parse(JSON.stringify(constraints));
			if (browserDetails.version < 38) {
				logging('spec: ' + JSON.stringify(constraints));
				if (constraints.audio) {
					constraints.audio = constraintsToFF37_(constraints.audio);
				}
				if (constraints.video) {
					constraints.video = constraintsToFF37_(constraints.video);
				}
				logging('ff37: ' + JSON.stringify(constraints));
			}
			return navigator.mozGetUserMedia(constraints, onSuccess, function(e) {
				onError(shimError_(e));
			});
		};

		// Returns the result of getUserMedia as a Promise.
		var getUserMediaPromise_ = function(constraints) {
			return new Promise(function(resolve, reject) {
				getUserMedia_(constraints, resolve, reject);
			});
		};

		// Shim for mediaDevices on older versions.
		if (!navigator.mediaDevices) {
			navigator.mediaDevices = {getUserMedia: getUserMediaPromise_,
				addEventListener: function() { },
				removeEventListener: function() { }
			};
		}
		navigator.mediaDevices.enumerateDevices =
			navigator.mediaDevices.enumerateDevices || function() {
				return new Promise(function(resolve) {
					var infos = [
						{kind: 'audioinput', deviceId: 'default', label: '', groupId: ''},
						{kind: 'videoinput', deviceId: 'default', label: '', groupId: ''}
					];
					resolve(infos);
				});
			};

		if (browserDetails.version < 41) {
			// Work around http://bugzil.la/1169665
			var orgEnumerateDevices =
				navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
			navigator.mediaDevices.enumerateDevices = function() {
				return orgEnumerateDevices().then(undefined, function(e) {
					if (e.name === 'NotFoundError') {
						return [];
					}
					throw e;
				});
			};
		}
		if (browserDetails.version < 49) {
			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
			bind(navigator.mediaDevices);
			navigator.mediaDevices.getUserMedia = function(c) {
				return origGetUserMedia(c).catch(function(e) {
					return Promise.reject(shimError_(e));
				});
			};
		}
		navigator.getUserMedia = function(constraints, onSuccess, onError) {
			if (browserDetails.version < 44) {
				return getUserMedia_(constraints, onSuccess, onError);
			}
			// Replace Firefox 44+'s deprecation warning with unprefixed version.
			console.warn('navigator.getUserMedia has been replaced by ' +
				'navigator.mediaDevices.getUserMedia');
			navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
		};
	};

},{"../utils":38}],37:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	'use strict';
	var safariShim = {
		// TODO: DrAlex, should be here, double check against LayoutTests
		// shimOnTrack: function() { },

		// TODO: DrAlex
		// attachMediaStream: function(element, stream) { },
		// reattachMediaStream: function(to, from) { },

		// TODO: once the back-end for the mac port is done, add.
		// TODO: check for webkitGTK+
		// shimPeerConnection: function() { },

		shimGetUserMedia: function() {
			navigator.getUserMedia = navigator.webkitGetUserMedia;
		}
	};

// Expose public methods.
	module.exports = {
		shimGetUserMedia: safariShim.shimGetUserMedia
		// TODO
		// shimOnTrack: safariShim.shimOnTrack,
		// shimPeerConnection: safariShim.shimPeerConnection,
		// attachMediaStream: safariShim.attachMediaStream,
		// reattachMediaStream: safariShim.reattachMediaStream
	};

},{}],38:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var logDisabled_ = true;

// Utility methods.
	var utils = {
		disableLog: function(bool) {
			if (typeof bool !== 'boolean') {
				return new Error('Argument type: ' + typeof bool +
					'. Please use a boolean.');
			}
			logDisabled_ = bool;
			return (bool) ? 'adapter.js logging disabled' :
				'adapter.js logging enabled';
		},

		log: function() {
			if (typeof window === 'object') {
				if (logDisabled_) {
					return;
				}
				if (typeof console !== 'undefined' && typeof console.log === 'function') {
					console.log.apply(console, arguments);
				}
			}
		},

		/**
		 * Extract browser version out of the provided user agent string.
		 *
		 * @param {!string} uastring userAgent string.
		 * @param {!string} expr Regular expression used as match criteria.
		 * @param {!number} pos position in the version string to be returned.
		 * @return {!number} browser version.
		 */
		extractVersion: function(uastring, expr, pos) {
			var match = uastring.match(expr);
			return match && match.length >= pos && parseInt(match[pos], 10);
		},

		/**
		 * Browser detector.
		 *
		 * @return {object} result containing browser, version and minVersion
		 *     properties.
		 */
		detectBrowser: function() {
			// Returned result object.
			var result = {};
			result.browser = null;
			result.version = null;
			result.minVersion = null;

			// Fail early if it's not a browser
			if (typeof window === 'undefined' || !window.navigator) {
				result.browser = 'Not a browser.';
				return result;
			}

			// Firefox.
			if (navigator.mozGetUserMedia) {
				result.browser = 'firefox';
				result.version = this.extractVersion(navigator.userAgent,
					/Firefox\/([0-9]+)\./, 1);
				result.minVersion = 31;

				// all webkit-based browsers
			} else if (navigator.webkitGetUserMedia) {
				// Chrome, Chromium, Webview, Opera, all use the chrome shim for now
				if (window.webkitRTCPeerConnection) {
					result.browser = 'chrome';
					result.version = this.extractVersion(navigator.userAgent,
						/Chrom(e|ium)\/([0-9]+)\./, 2);
					result.minVersion = 38;

					// Safari or unknown webkit-based
					// for the time being Safari has support for MediaStreams but not webRTC
				} else {
					// Safari UA substrings of interest for reference:
					// - webkit version:           AppleWebKit/602.1.25 (also used in Op,Cr)
					// - safari UI version:        Version/9.0.3 (unique to Safari)
					// - safari UI webkit version: Safari/601.4.4 (also used in Op,Cr)
					//
					// if the webkit version and safari UI webkit versions are equals,
					// ... this is a stable version.
					//
					// only the internal webkit version is important today to know if
					// media streams are supported
					//
					if (navigator.userAgent.match(/Version\/(\d+).(\d+)/)) {
						result.browser = 'safari';
						result.version = this.extractVersion(navigator.userAgent,
							/AppleWebKit\/([0-9]+)\./, 1);
						result.minVersion = 602;

						// unknown webkit-based browser
					} else {
						result.browser = 'Unsupported webkit-based browser ' +
							'with GUM support but no WebRTC support.';
						return result;
					}
				}

				// Edge.
			} else if (navigator.mediaDevices &&
				navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
				result.browser = 'edge';
				result.version = this.extractVersion(navigator.userAgent,
					/Edge\/(\d+).(\d+)$/, 2);
				result.minVersion = 10547;

				// Default fallthrough: not supported.
			} else {
				result.browser = 'Not a supported browser.';
				return result;
			}

			// Warn if version is less than minVersion.
			if (result.version < result.minVersion) {
				utils.log('Browser: ' + result.browser + ' Version: ' + result.version +
					' < minimum supported version: ' + result.minVersion +
					'\n some things might not work!');
			}

			return result;
		}
	};

// Export.
	module.exports = {
		log: utils.log,
		disableLog: utils.disableLog,
		browserDetails: utils.detectBrowser(),
		extractVersion: utils.extractVersion
	};

},{}],39:[function(require,module,exports){

	/**
	 * Returns `this`. Execute this without a "context" (i.e. without it being
	 * attached to an object of the left-hand side), and `this` points to the
	 * "global" scope of the current JS execution.
	 */

	module.exports = (function () { return this; })();

},{}],40:[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;

		//Setup Audio Context
		if (!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.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":100}],41:[function(require,module,exports){
	(function (global){

		/*
		 * Module requirements.
		 */

		var isArray = require('isarray');

		/**
		 * Module exports.
		 */

		module.exports = hasBinary;

		/**
		 * Checks for binary data.
		 *
		 * Right now only Buffer and ArrayBuffer are supported..
		 *
		 * @param {Object} anything
		 * @api public
		 */

		function hasBinary(data) {

			function _hasBinary(obj) {
				if (!obj) return false;

				if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
					(global.ArrayBuffer && obj instanceof ArrayBuffer) ||
					(global.Blob && obj instanceof Blob) ||
					(global.File && obj instanceof File)
				) {
					return true;
				}

				if (isArray(obj)) {
					for (var i = 0; i < obj.length; i++) {
						if (_hasBinary(obj[i])) {
							return true;
						}
					}
				} else if (obj && 'object' == typeof obj) {
					if (obj.toJSON) {
						obj = obj.toJSON();
					}

					for (var key in obj) {
						if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
							return true;
						}
					}
				}

				return false;
			}

			return _hasBinary(data);
		}

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"isarray":42}],42:[function(require,module,exports){
	module.exports = Array.isArray || function (arr) {
			return Object.prototype.toString.call(arr) == '[object Array]';
		};

},{}],43:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var global = require('global');

	/**
	 * Module exports.
	 *
	 * Logic borrowed from Modernizr:
	 *
	 *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
	 */

	try {
		module.exports = 'XMLHttpRequest' in global &&
			'withCredentials' in new global.XMLHttpRequest();
	} catch (err) {
		// if XMLHttp support is disabled in IE then it will throw
		// when trying to create
		module.exports = false;
	}

},{"global":39}],44:[function(require,module,exports){

	var indexOf = [].indexOf;

	module.exports = function(arr, obj){
		if (indexOf) return arr.indexOf(obj);
		for (var i = 0; i < arr.length; ++i) {
			if (arr[i] === obj) return i;
		}
		return -1;
	};
},{}],45:[function(require,module,exports){
	/*! JSON v3.2.6 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
	;(function (window) {
		// Convenience aliases.
		var getClass = {}.toString, isProperty, forEach, undef;

		// Detect the `define` function exposed by asynchronous module loaders. The
		// strict `define` check is necessary for compatibility with `r.js`.
		var isLoader = typeof define === "function" && define.amd;

		// Detect native implementations.
		var nativeJSON = typeof JSON == "object" && JSON;

		// Set up the JSON 3 namespace, preferring the CommonJS `exports` object if
		// available.
		var JSON3 = typeof exports == "object" && exports && !exports.nodeType && exports;

		if (JSON3 && nativeJSON) {
			// Explicitly delegate to the native `stringify` and `parse`
			// implementations in CommonJS environments.
			JSON3.stringify = nativeJSON.stringify;
			JSON3.parse = nativeJSON.parse;
		} else {
			// Export for web browsers, JavaScript engines, and asynchronous module
			// loaders, using the global `JSON` object if available.
			JSON3 = window.JSON = nativeJSON || {};
		}

		// Test the `Date#getUTC*` methods. Based on work by @Yaffle.
		var isExtended = new Date(-3509827334573292);
		try {
			// The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
			// results for certain dates in Opera >= 10.53.
			isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
				// Safari < 2.0.2 stores the internal millisecond time value correctly,
				// but clips the values returned by the date methods to the range of
				// signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
				isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
		} catch (exception) {}

		// Internal: Determines whether the native `JSON.stringify` and `parse`
		// implementations are spec-compliant. Based on work by Ken Snyder.
		function has(name) {
			if (has[name] !== undef) {
				// Return cached feature test result.
				return has[name];
			}

			var isSupported;
			if (name == "bug-string-char-index") {
				// IE <= 7 doesn't support accessing string characters using square
				// bracket notation. IE 8 only supports this for primitives.
				isSupported = "a"[0] != "a";
			} else if (name == "json") {
				// Indicates whether both `JSON.stringify` and `JSON.parse` are
				// supported.
				isSupported = has("json-stringify") && has("json-parse");
			} else {
				var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
				// Test `JSON.stringify`.
				if (name == "json-stringify") {
					var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
					if (stringifySupported) {
						// A test function object with a custom `toJSON` method.
						(value = function () {
							return 1;
						}).toJSON = value;
						try {
							stringifySupported =
								// Firefox 3.1b1 and b2 serialize string, number, and boolean
								// primitives as object literals.
								stringify(0) === "0" &&
								// FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
								// literals.
								stringify(new Number()) === "0" &&
								stringify(new String()) == '""' &&
								// FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
								// does not define a canonical JSON representation (this applies to
								// objects with `toJSON` properties as well, *unless* they are nested
								// within an object or array).
								stringify(getClass) === undef &&
								// IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
								// FF 3.1b3 pass this test.
								stringify(undef) === undef &&
								// Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
								// respectively, if the value is omitted entirely.
								stringify() === undef &&
								// FF 3.1b1, 2 throw an error if the given value is not a number,
								// string, array, object, Boolean, or `null` literal. This applies to
								// objects with custom `toJSON` methods as well, unless they are nested
								// inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
								// methods entirely.
								stringify(value) === "1" &&
								stringify([value]) == "[1]" &&
								// Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
								// `"[null]"`.
								stringify([undef]) == "[null]" &&
								// YUI 3.0.0b1 fails to serialize `null` literals.
								stringify(null) == "null" &&
								// FF 3.1b1, 2 halts serialization if an array contains a function:
								// `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
								// elides non-JSON values from objects and arrays, unless they
								// define custom `toJSON` methods.
								stringify([undef, getClass, null]) == "[null,null,null]" &&
								// Simple serialization test. FF 3.1b1 uses Unicode escape sequences
								// where character escape codes are expected (e.g., `\b` => `\u0008`).
								stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
								// FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
								stringify(null, value) === "1" &&
								stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
								// JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
								// serialize extended years.
								stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
								// The milliseconds are optional in ES 5, but required in 5.1.
								stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
								// Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
								// four-digit years instead of six-digit years. Credits: @Yaffle.
								stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
								// Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
								// values less than 1000. Credits: @Yaffle.
								stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
						} catch (exception) {
							stringifySupported = false;
						}
					}
					isSupported = stringifySupported;
				}
				// Test `JSON.parse`.
				if (name == "json-parse") {
					var parse = JSON3.parse;
					if (typeof parse == "function") {
						try {
							// FF 3.1b1, b2 will throw an exception if a bare literal is provided.
							// Conforming implementations should also coerce the initial argument to
							// a string prior to parsing.
							if (parse("0") === 0 && !parse(false)) {
								// Simple parsing test.
								value = parse(serialized);
								var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
								if (parseSupported) {
									try {
										// Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
										parseSupported = !parse('"\t"');
									} catch (exception) {}
									if (parseSupported) {
										try {
											// FF 4.0 and 4.0.1 allow leading `+` signs and leading
											// decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
											// certain octal literals.
											parseSupported = parse("01") !== 1;
										} catch (exception) {}
									}
									if (parseSupported) {
										try {
											// FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
											// points. These environments, along with FF 3.1b1 and 2,
											// also allow trailing commas in JSON objects and arrays.
											parseSupported = parse("1.") !== 1;
										} catch (exception) {}
									}
								}
							}
						} catch (exception) {
							parseSupported = false;
						}
					}
					isSupported = parseSupported;
				}
			}
			return has[name] = !!isSupported;
		}

		if (!has("json")) {
			// Common `[[Class]]` name aliases.
			var functionClass = "[object Function]";
			var dateClass = "[object Date]";
			var numberClass = "[object Number]";
			var stringClass = "[object String]";
			var arrayClass = "[object Array]";
			var booleanClass = "[object Boolean]";

			// Detect incomplete support for accessing string characters by index.
			var charIndexBuggy = has("bug-string-char-index");

			// Define additional utility methods if the `Date` methods are buggy.
			if (!isExtended) {
				var floor = Math.floor;
				// A mapping between the months of the year and the number of days between
				// January 1st and the first of the respective month.
				var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
				// Internal: Calculates the number of days between the Unix epoch and the
				// first day of the given month.
				var getDay = function (year, month) {
					return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
				};
			}

			// Internal: Determines if a property is a direct property of the given
			// object. Delegates to the native `Object#hasOwnProperty` method.
			if (!(isProperty = {}.hasOwnProperty)) {
				isProperty = function (property) {
					var members = {}, constructor;
					if ((members.__proto__ = null, members.__proto__ = {
							// The *proto* property cannot be set multiple times in recent
							// versions of Firefox and SeaMonkey.
							"toString": 1
						}, members).toString != getClass) {
						// Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
						// supports the mutable *proto* property.
						isProperty = function (property) {
							// Capture and break the object's prototype chain (see section 8.6.2
							// of the ES 5.1 spec). The parenthesized expression prevents an
							// unsafe transformation by the Closure Compiler.
							var original = this.__proto__, result = property in (this.__proto__ = null, this);
							// Restore the original prototype chain.
							this.__proto__ = original;
							return result;
						};
					} else {
						// Capture a reference to the top-level `Object` constructor.
						constructor = members.constructor;
						// Use the `constructor` property to simulate `Object#hasOwnProperty` in
						// other environments.
						isProperty = function (property) {
							var parent = (this.constructor || constructor).prototype;
							return property in this && !(property in parent && this[property] === parent[property]);
						};
					}
					members = null;
					return isProperty.call(this, property);
				};
			}

			// Internal: A set of primitive types used by `isHostType`.
			var PrimitiveTypes = {
				'boolean': 1,
				'number': 1,
				'string': 1,
				'undefined': 1
			};

			// Internal: Determines if the given object `property` value is a
			// non-primitive.
			var isHostType = function (object, property) {
				var type = typeof object[property];
				return type == 'object' ? !!object[property] : !PrimitiveTypes[type];
			};

			// Internal: Normalizes the `for...in` iteration algorithm across
			// environments. Each enumerated key is yielded to a `callback` function.
			forEach = function (object, callback) {
				var size = 0, Properties, members, property;

				// Tests for bugs in the current environment's `for...in` algorithm. The
				// `valueOf` property inherits the non-enumerable flag from
				// `Object.prototype` in older versions of IE, Netscape, and Mozilla.
				(Properties = function () {
					this.valueOf = 0;
				}).prototype.valueOf = 0;

				// Iterate over a new instance of the `Properties` class.
				members = new Properties();
				for (property in members) {
					// Ignore all properties inherited from `Object.prototype`.
					if (isProperty.call(members, property)) {
						size++;
					}
				}
				Properties = members = null;

				// Normalize the iteration algorithm.
				if (!size) {
					// A list of non-enumerable properties inherited from `Object.prototype`.
					members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
					// IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
					// properties.
					forEach = function (object, callback) {
						var isFunction = getClass.call(object) == functionClass, property, length;
						var hasProperty = !isFunction && typeof object.constructor != 'function' && isHostType(object, 'hasOwnProperty') ? object.hasOwnProperty : isProperty;
						for (property in object) {
							// Gecko <= 1.0 enumerates the `prototype` property of functions under
							// certain conditions; IE does not.
							if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
								callback(property);
							}
						}
						// Manually invoke the callback for each non-enumerable property.
						for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
					};
				} else if (size == 2) {
					// Safari <= 2.0.4 enumerates shadowed properties twice.
					forEach = function (object, callback) {
						// Create a set of iterated properties.
						var members = {}, isFunction = getClass.call(object) == functionClass, property;
						for (property in object) {
							// Store each property name to prevent double enumeration. The
							// `prototype` property of functions is not enumerated due to cross-
							// environment inconsistencies.
							if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
								callback(property);
							}
						}
					};
				} else {
					// No bugs detected; use the standard `for...in` algorithm.
					forEach = function (object, callback) {
						var isFunction = getClass.call(object) == functionClass, property, isConstructor;
						for (property in object) {
							if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
								callback(property);
							}
						}
						// Manually invoke the callback for the `constructor` property due to
						// cross-environment inconsistencies.
						if (isConstructor || isProperty.call(object, (property = "constructor"))) {
							callback(property);
						}
					};
				}
				return forEach(object, callback);
			};

			// Public: Serializes a JavaScript `value` as a JSON string. The optional
			// `filter` argument may specify either a function that alters how object and
			// array members are serialized, or an array of strings and numbers that
			// indicates which properties should be serialized. The optional `width`
			// argument may be either a string or number that specifies the indentation
			// level of the output.
			if (!has("json-stringify")) {
				// Internal: A map of control characters and their escaped equivalents.
				var Escapes = {
					92: "\\\\",
					34: '\\"',
					8: "\\b",
					12: "\\f",
					10: "\\n",
					13: "\\r",
					9: "\\t"
				};

				// Internal: Converts `value` into a zero-padded string such that its
				// length is at least equal to `width`. The `width` must be <= 6.
				var leadingZeroes = "000000";
				var toPaddedString = function (width, value) {
					// The `|| 0` expression is necessary to work around a bug in
					// Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
					return (leadingZeroes + (value || 0)).slice(-width);
				};

				// Internal: Double-quotes a string `value`, replacing all ASCII control
				// characters (characters with code unit values between 0 and 31) with
				// their escaped equivalents. This is an implementation of the
				// `Quote(value)` operation defined in ES 5.1 section 15.12.3.
				var unicodePrefix = "\\u00";
				var quote = function (value) {
					var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
					if (isLarge) {
						symbols = value.split("");
					}
					for (; index < length; index++) {
						var charCode = value.charCodeAt(index);
						// If the character is a control character, append its Unicode or
						// shorthand escape sequence; otherwise, append the character as-is.
						switch (charCode) {
							case 8: case 9: case 10: case 12: case 13: case 34: case 92:
							result += Escapes[charCode];
							break;
							default:
								if (charCode < 32) {
									result += unicodePrefix + toPaddedString(2, charCode.toString(16));
									break;
								}
								result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
						}
					}
					return result + '"';
				};

				// Internal: Recursively serializes an object. Implements the
				// `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
				var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
					var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
					try {
						// Necessary for host object support.
						value = object[property];
					} catch (exception) {}
					if (typeof value == "object" && value) {
						className = getClass.call(value);
						if (className == dateClass && !isProperty.call(value, "toJSON")) {
							if (value > -1 / 0 && value < 1 / 0) {
								// Dates are serialized according to the `Date#toJSON` method
								// specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
								// for the ISO 8601 date time string format.
								if (getDay) {
									// Manually compute the year, month, date, hours, minutes,
									// seconds, and milliseconds if the `getUTC*` methods are
									// buggy. Adapted from @Yaffle's `date-shim` project.
									date = floor(value / 864e5);
									for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
									for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
									date = 1 + date - getDay(year, month);
									// The `time` value specifies the time within the day (see ES
									// 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
									// to compute `A modulo B`, as the `%` operator does not
									// correspond to the `modulo` operation for negative numbers.
									time = (value % 864e5 + 864e5) % 864e5;
									// The hours, minutes, seconds, and milliseconds are obtained by
									// decomposing the time within the day. See section 15.9.1.10.
									hours = floor(time / 36e5) % 24;
									minutes = floor(time / 6e4) % 60;
									seconds = floor(time / 1e3) % 60;
									milliseconds = time % 1e3;
								} else {
									year = value.getUTCFullYear();
									month = value.getUTCMonth();
									date = value.getUTCDate();
									hours = value.getUTCHours();
									minutes = value.getUTCMinutes();
									seconds = value.getUTCSeconds();
									milliseconds = value.getUTCMilliseconds();
								}
								// Serialize extended years correctly.
								value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
									"-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
									// Months, dates, hours, minutes, and seconds should have two
									// digits; milliseconds should have three.
									"T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
									// Milliseconds are optional in ES 5.0, but required in 5.1.
									"." + toPaddedString(3, milliseconds) + "Z";
							} else {
								value = null;
							}
						} else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
							// Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
							// `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
							// ignores all `toJSON` methods on these objects unless they are
							// defined directly on an instance.
							value = value.toJSON(property);
						}
					}
					if (callback) {
						// If a replacement function was provided, call it to obtain the value
						// for serialization.
						value = callback.call(object, property, value);
					}
					if (value === null) {
						return "null";
					}
					className = getClass.call(value);
					if (className == booleanClass) {
						// Booleans are represented literally.
						return "" + value;
					} else if (className == numberClass) {
						// JSON numbers must be finite. `Infinity` and `NaN` are serialized as
						// `"null"`.
						return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
					} else if (className == stringClass) {
						// Strings are double-quoted and escaped.
						return quote("" + value);
					}
					// Recursively serialize objects and arrays.
					if (typeof value == "object") {
						// Check for cyclic structures. This is a linear search; performance
						// is inversely proportional to the number of unique nested objects.
						for (length = stack.length; length--;) {
							if (stack[length] === value) {
								// Cyclic structures cannot be serialized by `JSON.stringify`.
								throw TypeError();
							}
						}
						// Add the object to the stack of traversed objects.
						stack.push(value);
						results = [];
						// Save the current indentation level and indent one additional level.
						prefix = indentation;
						indentation += whitespace;
						if (className == arrayClass) {
							// Recursively serialize array elements.
							for (index = 0, length = value.length; index < length; index++) {
								element = serialize(index, value, callback, properties, whitespace, indentation, stack);
								results.push(element === undef ? "null" : element);
							}
							result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
						} else {
							// Recursively serialize object members. Members are selected from
							// either a user-specified list of property names, or the object
							// itself.
							forEach(properties || value, function (property) {
								var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
								if (element !== undef) {
									// According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
									// is not the empty string, let `member` {quote(property) + ":"}
									// be the concatenation of `member` and the `space` character."
									// The "`space` character" refers to the literal space
									// character, not the `space` {width} argument provided to
									// `JSON.stringify`.
									results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
								}
							});
							result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
						}
						// Remove the object from the traversed object stack.
						stack.pop();
						return result;
					}
				};

				// Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
				JSON3.stringify = function (source, filter, width) {
					var whitespace, callback, properties, className;
					if (typeof filter == "function" || typeof filter == "object" && filter) {
						if ((className = getClass.call(filter)) == functionClass) {
							callback = filter;
						} else if (className == arrayClass) {
							// Convert the property names array into a makeshift set.
							properties = {};
							for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
						}
					}
					if (width) {
						if ((className = getClass.call(width)) == numberClass) {
							// Convert the `width` to an integer and create a string containing
							// `width` number of space characters.
							if ((width -= width % 1) > 0) {
								for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
							}
						} else if (className == stringClass) {
							whitespace = width.length <= 10 ? width : width.slice(0, 10);
						}
					}
					// Opera <= 7.54u2 discards the values associated with empty string keys
					// (`""`) only if they are used directly within an object member list
					// (e.g., `!("" in { "": 1})`).
					return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
				};
			}

			// Public: Parses a JSON source string.
			if (!has("json-parse")) {
				var fromCharCode = String.fromCharCode;

				// Internal: A map of escaped control characters and their unescaped
				// equivalents.
				var Unescapes = {
					92: "\\",
					34: '"',
					47: "/",
					98: "\b",
					116: "\t",
					110: "\n",
					102: "\f",
					114: "\r"
				};

				// Internal: Stores the parser state.
				var Index, Source;

				// Internal: Resets the parser state and throws a `SyntaxError`.
				var abort = function() {
					Index = Source = null;
					throw SyntaxError();
				};

				// Internal: Returns the next token, or `"$"` if the parser has reached
				// the end of the source string. A token may be a string, number, `null`
				// literal, or Boolean literal.
				var lex = function () {
					var source = Source, length = source.length, value, begin, position, isSigned, charCode;
					while (Index < length) {
						charCode = source.charCodeAt(Index);
						switch (charCode) {
							case 9: case 10: case 13: case 32:
							// Skip whitespace tokens, including tabs, carriage returns, line
							// feeds, and space characters.
							Index++;
							break;
							case 123: case 125: case 91: case 93: case 58: case 44:
							// Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
							// the current position.
							value = charIndexBuggy ? source.charAt(Index) : source[Index];
							Index++;
							return value;
							case 34:
								// `"` delimits a JSON string; advance to the next character and
								// begin parsing the string. String tokens are prefixed with the
								// sentinel `@` character to distinguish them from punctuators and
								// end-of-string tokens.
								for (value = "@", Index++; Index < length;) {
									charCode = source.charCodeAt(Index);
									if (charCode < 32) {
										// Unescaped ASCII control characters (those with a code unit
										// less than the space character) are not permitted.
										abort();
									} else if (charCode == 92) {
										// A reverse solidus (`\`) marks the beginning of an escaped
										// control character (including `"`, `\`, and `/`) or Unicode
										// escape sequence.
										charCode = source.charCodeAt(++Index);
										switch (charCode) {
											case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
											// Revive escaped control characters.
											value += Unescapes[charCode];
											Index++;
											break;
											case 117:
												// `\u` marks the beginning of a Unicode escape sequence.
												// Advance to the first character and validate the
												// four-digit code point.
												begin = ++Index;
												for (position = Index + 4; Index < position; Index++) {
													charCode = source.charCodeAt(Index);
													// A valid sequence comprises four hexdigits (case-
													// insensitive) that form a single hexadecimal value.
													if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
														// Invalid Unicode escape sequence.
														abort();
													}
												}
												// Revive the escaped character.
												value += fromCharCode("0x" + source.slice(begin, Index));
												break;
											default:
												// Invalid escape sequence.
												abort();
										}
									} else {
										if (charCode == 34) {
											// An unescaped double-quote character marks the end of the
											// string.
											break;
										}
										charCode = source.charCodeAt(Index);
										begin = Index;
										// Optimize for the common case where a string is valid.
										while (charCode >= 32 && charCode != 92 && charCode != 34) {
											charCode = source.charCodeAt(++Index);
										}
										// Append the string as-is.
										value += source.slice(begin, Index);
									}
								}
								if (source.charCodeAt(Index) == 34) {
									// Advance to the next character and return the revived string.
									Index++;
									return value;
								}
								// Unterminated string.
								abort();
							default:
								// Parse numbers and literals.
								begin = Index;
								// Advance past the negative sign, if one is specified.
								if (charCode == 45) {
									isSigned = true;
									charCode = source.charCodeAt(++Index);
								}
								// Parse an integer or floating-point value.
								if (charCode >= 48 && charCode <= 57) {
									// Leading zeroes are interpreted as octal literals.
									if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
										// Illegal octal literal.
										abort();
									}
									isSigned = false;
									// Parse the integer component.
									for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
									// Floats cannot contain a leading decimal point; however, this
									// case is already accounted for by the parser.
									if (source.charCodeAt(Index) == 46) {
										position = ++Index;
										// Parse the decimal component.
										for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
										if (position == Index) {
											// Illegal trailing decimal.
											abort();
										}
										Index = position;
									}
									// Parse exponents. The `e` denoting the exponent is
									// case-insensitive.
									charCode = source.charCodeAt(Index);
									if (charCode == 101 || charCode == 69) {
										charCode = source.charCodeAt(++Index);
										// Skip past the sign following the exponent, if one is
										// specified.
										if (charCode == 43 || charCode == 45) {
											Index++;
										}
										// Parse the exponential component.
										for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
										if (position == Index) {
											// Illegal empty exponent.
											abort();
										}
										Index = position;
									}
									// Coerce the parsed value to a JavaScript number.
									return +source.slice(begin, Index);
								}
								// A negative sign may only precede numbers.
								if (isSigned) {
									abort();
								}
								// `true`, `false`, and `null` literals.
								if (source.slice(Index, Index + 4) == "true") {
									Index += 4;
									return true;
								} else if (source.slice(Index, Index + 5) == "false") {
									Index += 5;
									return false;
								} else if (source.slice(Index, Index + 4) == "null") {
									Index += 4;
									return null;
								}
								// Unrecognized token.
								abort();
						}
					}
					// Return the sentinel `$` character if the parser has reached the end
					// of the source string.
					return "$";
				};

				// Internal: Parses a JSON `value` token.
				var get = function (value) {
					var results, hasMembers;
					if (value == "$") {
						// Unexpected end of input.
						abort();
					}
					if (typeof value == "string") {
						if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
							// Remove the sentinel `@` character.
							return value.slice(1);
						}
						// Parse object and array literals.
						if (value == "[") {
							// Parses a JSON array, returning a new JavaScript array.
							results = [];
							for (;; hasMembers || (hasMembers = true)) {
								value = lex();
								// A closing square bracket marks the end of the array literal.
								if (value == "]") {
									break;
								}
								// If the array literal contains elements, the current token
								// should be a comma separating the previous element from the
								// next.
								if (hasMembers) {
									if (value == ",") {
										value = lex();
										if (value == "]") {
											// Unexpected trailing `,` in array literal.
											abort();
										}
									} else {
										// A `,` must separate each array element.
										abort();
									}
								}
								// Elisions and leading commas are not permitted.
								if (value == ",") {
									abort();
								}
								results.push(get(value));
							}
							return results;
						} else if (value == "{") {
							// Parses a JSON object, returning a new JavaScript object.
							results = {};
							for (;; hasMembers || (hasMembers = true)) {
								value = lex();
								// A closing curly brace marks the end of the object literal.
								if (value == "}") {
									break;
								}
								// If the object literal contains members, the current token
								// should be a comma separator.
								if (hasMembers) {
									if (value == ",") {
										value = lex();
										if (value == "}") {
											// Unexpected trailing `,` in object literal.
											abort();
										}
									} else {
										// A `,` must separate each object member.
										abort();
									}
								}
								// Leading commas are not permitted, object property names must be
								// double-quoted strings, and a `:` must separate each property
								// name and value.
								if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
									abort();
								}
								results[value.slice(1)] = get(lex());
							}
							return results;
						}
						// Unexpected token encountered.
						abort();
					}
					return value;
				};

				// Internal: Updates a traversed object member.
				var update = function(source, property, callback) {
					var element = walk(source, property, callback);
					if (element === undef) {
						delete source[property];
					} else {
						source[property] = element;
					}
				};

				// Internal: Recursively traverses a parsed JSON object, invoking the
				// `callback` function for each value. This is an implementation of the
				// `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
				var walk = function (source, property, callback) {
					var value = source[property], length;
					if (typeof value == "object" && value) {
						// `forEach` can't be used to traverse an array in Opera <= 8.54
						// because its `Object#hasOwnProperty` implementation returns `false`
						// for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
						if (getClass.call(value) == arrayClass) {
							for (length = value.length; length--;) {
								update(value, length, callback);
							}
						} else {
							forEach(value, function (property) {
								update(value, property, callback);
							});
						}
					}
					return callback.call(source, property, value);
				};

				// Public: `JSON.parse`. See ES 5.1 section 15.12.2.
				JSON3.parse = function (source, callback) {
					var result, value;
					Index = 0;
					Source = "" + source;
					result = get(lex());
					// If a JSON string contains multiple tokens, it is invalid.
					if (lex() != "$") {
						abort();
					}
					// Reset the parser state.
					Index = Source = null;
					return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
				};
			}
		}

		// Export for asynchronous module loaders.
		if (isLoader) {
			define(function () {
				return JSON3;
			});
		}
	}(this));

},{}],46:[function(require,module,exports){
	var util = require('util');
	var hark = require('hark');
	var webrtcSupport = require('webrtcsupport');
	var getUserMedia = require('getusermedia');
	var getScreenMedia = require('getscreenmedia');
	var WildEmitter = require('wildemitter');
	var GainController = require('mediastream-gain');
	var mockconsole = require('mockconsole');


	function isAllTracksEnded(stream) {
		var isAllTracksEnded = true;
		stream.getTracks().forEach(function (t) {
			isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
		});
		return isAllTracksEnded;
	}

	function LocalMedia(opts) {
		WildEmitter.call(this);

		var config = this.config = {
			autoAdjustMic: false,
			detectSpeakingEvents: false,
			audioFallback: false,
			media: {
				audio: true,
				video: true
			},
			logger: mockconsole
		};

		var item;
		for (item in opts) {
			if (opts.hasOwnProperty(item)) {
				this.config[item] = opts[item];
			}
		}

		this.logger = config.logger;
		this._log = this.logger.log.bind(this.logger, 'LocalMedia:');
		this._logerror = this.logger.error.bind(this.logger, 'LocalMedia:');

		this.screenSharingSupport = webrtcSupport.supportScreenSharing;

		this.localStreams = [];
		this.localScreens = [];

		if (!webrtcSupport.supportGetUserMedia) {
			this._logerror('Your browser does not support local media capture.');
		}
	}

	util.inherits(LocalMedia, WildEmitter);


	LocalMedia.prototype.start = function (mediaConstraints, cb) {
		var self = this;
		var constraints = mediaConstraints || this.config.media;

		getUserMedia(constraints, function (err, stream) {

			if (!err) {
				if (constraints.audio && self.config.detectSpeakingEvents) {
					self.setupAudioMonitor(stream, self.config.harkOptions);
				}
				self.localStreams.push(stream);

				if (self.config.autoAdjustMic) {
					self.gainController = new GainController(stream);
					// start out somewhat muted if we can track audio
					self.setMicIfEnabled(0.5);
				}

				stream.getTracks().forEach(function (track) {
					track.addEventListener('ended', function () {
						if (isAllTracksEnded(stream)) {
							self.emit('localStreamStopped', stream);
						}
					});
				});

				self.emit('localStream', stream);
			} else {
				// Fallback for users without a camera
				if (self.config.audioFallback && (err.name === 'DevicesNotFoundError' || err.name === 'NotFoundError') && constraints.video !== false) {
					constraints.video = false;
					self.start(constraints, cb);
					return;
				}
			}
			if (cb) {
				return cb(err, stream);
			}
		});
	};

	LocalMedia.prototype.stop = function (stream) {
		// FIXME: duplicates cleanup code until fixed in FF
		if (stream) {
			stream.getTracks().forEach(function (track) { track.stop(); });
			var idx = this.localStreams.indexOf(stream);
			if (idx > -1) {
				this.localStreams.splice(idx, 1);
				if (webrtcSupport.prefix === 'moz') {
					this.emit('localStreamStopped', stream);
				}
			} else {
				idx = this.localScreens.indexOf(stream);
				if (idx > -1) {
					this.localScreens.splice(idx, 1);
					if (webrtcSupport.prefix === 'moz') {
						this.emit('localScreenStopped', stream);
					}
				}
			}
		} else {
			this.stopStreams();
			this.stopScreenShare();
		}
	};

	LocalMedia.prototype.stopStreams = function () {
		var self = this;
		if (this.audioMonitor) {
			this.audioMonitor.stop();
			delete this.audioMonitor;
		}
		var oldLocalStream = this.localStreams;
		this.localStreams = [];

		oldLocalStream.forEach(function (stream) {
			stream.getTracks().forEach(function (track) { track.stop(); });
			if (webrtcSupport.prefix === 'moz') {
				self.emit('localStreamStopped', stream);
			}
		});
	};

	LocalMedia.prototype.startScreenShare = function (mode, cb) {
		var self = this;
		getScreenMedia(mode, function (err, stream) {
			if (!err) {
				self.localScreens.push(stream);

				stream.getTracks().forEach(function (track) {
					track.addEventListener('ended', function () {
						if (isAllTracksEnded(stream)) {
							self.emit('localScreenStopped', stream);
						}
					});
				});

				self.emit('localScreen', stream);
			}

			// enable the callback
			if (cb) {
				return cb(err, stream);
			}
		});
	};

	LocalMedia.prototype.stopScreenShare = function (stream) {
		var self = this;
		if (stream) {
			stream.getTracks().forEach(function (track) { track.stop(); });
			var idx = this.localScreens.indexOf(stream);
			if (idx > -1) {
				this.localScreens.splice(idx, 1);
				if (webrtcSupport.prefix === 'moz') {
					this.emit('localScreenStopped', stream);
				}
			}
		} else {
			var oldLocalScreens = this.localScreens;
			this.localScreens = [];

			oldLocalScreens.forEach(function (stream) {
				stream.getTracks().forEach(function (track) { track.stop(); });
				if (webrtcSupport.prefix === 'moz') {
					self.emit('localScreenStopped', stream);
				}
			});
		}
	};

// Audio controls
	LocalMedia.prototype.mute = function () {
		this._audioEnabled(false);
		this.hardMuted = true;
		this.emit('audioOff');
	};

	LocalMedia.prototype.unmute = function () {
		this._audioEnabled(true);
		this.hardMuted = false;
		this.emit('audioOn');
	};

	LocalMedia.prototype.setupAudioMonitor = function (stream, harkOptions) {
		this._log('Setup audio');
		var audio = this.audioMonitor = hark(stream, harkOptions);
		var self = this;
		var timeout;

		audio.on('speaking', function () {
			self.emit('speaking');
			if (self.hardMuted) {
				return;
			}
			self.setMicIfEnabled(1);
		});

		audio.on('stopped_speaking', function () {
			if (timeout) {
				clearTimeout(timeout);
			}

			timeout = setTimeout(function () {
				self.emit('stoppedSpeaking');
				if (self.hardMuted) {
					return;
				}
				self.setMicIfEnabled(0.5);
			}, 1000);
		});
		audio.on('volume_change', function (volume, treshold) {
			self.emit('volumeChange', volume, treshold);
		});
	};

// We do this as a seperate method in order to
// still leave the "setMicVolume" as a working
// method.
	LocalMedia.prototype.setMicIfEnabled = function (volume) {
		if (!this.config.autoAdjustMic) {
			return;
		}
		this.gainController.setGain(volume);
	};

// Video controls
	LocalMedia.prototype.pauseVideo = function () {
		this._videoEnabled(false);
		this.emit('videoOff');
	};
	LocalMedia.prototype.resumeVideo = function () {
		this._videoEnabled(true);
		this.emit('videoOn');
	};

// Combined controls
	LocalMedia.prototype.pause = function () {
		this.mute();
		this.pauseVideo();
	};
	LocalMedia.prototype.resume = function () {
		this.unmute();
		this.resumeVideo();
	};

// Internal methods for enabling/disabling audio/video
	LocalMedia.prototype._audioEnabled = function (bool) {
		// work around for chrome 27 bug where disabling tracks
		// doesn't seem to work (works in canary, remove when working)
		this.setMicIfEnabled(bool ? 1 : 0);
		this.localStreams.forEach(function (stream) {
			stream.getAudioTracks().forEach(function (track) {
				track.enabled = !!bool;
			});
		});
	};
	LocalMedia.prototype._videoEnabled = function (bool) {
		this.localStreams.forEach(function (stream) {
			stream.getVideoTracks().forEach(function (track) {
				track.enabled = !!bool;
			});
		});
	};

// check if all audio streams are enabled
	LocalMedia.prototype.isAudioEnabled = function () {
		var enabled = true;
		var hasAudioTracks = false;
		this.localStreams.forEach(function (stream) {
			var audioTracks = stream.getAudioTracks();
			if (audioTracks.length > 0) {
				hasAudioTracks = true;
				audioTracks.forEach(function (track) {
					enabled = enabled && track.enabled;
				});
			}
		});

		// If no audioTracks were found, that means there is no microphone device.
		// In that case, isAudioEnabled should return false.
		if (!hasAudioTracks) {
			return false;
		}

		return enabled;
	};

// check if all video streams are enabled
	LocalMedia.prototype.isVideoEnabled = function () {
		var enabled = true;
		var hasVideoTracks = false;
		this.localStreams.forEach(function (stream) {
			var videoTracks = stream.getVideoTracks();
			if (videoTracks.length > 0) {
				hasVideoTracks = true;
				videoTracks.forEach(function (track) {
					enabled = enabled && track.enabled;
				});
			}
		});

		// If no videoTracks were found, that means there is no camera device.
		// In that case, isVideoEnabled should return false.
		if (!hasVideoTracks) {
			return false;
		}

		return enabled;
	};

// Backwards Compat
	LocalMedia.prototype.startLocalMedia = LocalMedia.prototype.start;
	LocalMedia.prototype.stopLocalMedia = LocalMedia.prototype.stop;

// fallback for old .localStream behaviour
	Object.defineProperty(LocalMedia.prototype, 'localStream', {
		get: function () {
			return this.localStreams.length > 0 ? this.localStreams[0] : null;
		}
	});
// fallback for old .localScreen behaviour
	Object.defineProperty(LocalMedia.prototype, 'localScreen', {
		get: function () {
			return this.localScreens.length > 0 ? this.localScreens[0] : null;
		}
	});

	module.exports = LocalMedia;

},{"getscreenmedia":27,"getusermedia":29,"hark":40,"mediastream-gain":48,"mockconsole":50,"util":89,"webrtcsupport":99,"wildemitter":100}],47:[function(require,module,exports){
	(function (global){
		/**
		 * lodash (Custom Build) <https://lodash.com/>
		 * Build: `lodash modularize exports="npm" -o ./`
		 * Copyright jQuery Foundation and other contributors <https://jquery.org/>
		 * Released under MIT license <https://lodash.com/license>
		 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
		 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
		 */

		/** Used as the size to enable large array optimizations. */
		var LARGE_ARRAY_SIZE = 200;

		/** Used to stand-in for `undefined` hash values. */
		var HASH_UNDEFINED = '__lodash_hash_undefined__';

		/** Used as references for various `Number` constants. */
		var MAX_SAFE_INTEGER = 9007199254740991;

		/** `Object#toString` result references. */
		var argsTag = '[object Arguments]',
			arrayTag = '[object Array]',
			boolTag = '[object Boolean]',
			dateTag = '[object Date]',
			errorTag = '[object Error]',
			funcTag = '[object Function]',
			genTag = '[object GeneratorFunction]',
			mapTag = '[object Map]',
			numberTag = '[object Number]',
			objectTag = '[object Object]',
			promiseTag = '[object Promise]',
			regexpTag = '[object RegExp]',
			setTag = '[object Set]',
			stringTag = '[object String]',
			symbolTag = '[object Symbol]',
			weakMapTag = '[object WeakMap]';

		var arrayBufferTag = '[object ArrayBuffer]',
			dataViewTag = '[object DataView]',
			float32Tag = '[object Float32Array]',
			float64Tag = '[object Float64Array]',
			int8Tag = '[object Int8Array]',
			int16Tag = '[object Int16Array]',
			int32Tag = '[object Int32Array]',
			uint8Tag = '[object Uint8Array]',
			uint8ClampedTag = '[object Uint8ClampedArray]',
			uint16Tag = '[object Uint16Array]',
			uint32Tag = '[object Uint32Array]';

		/**
		 * Used to match `RegExp`
		 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
		 */
		var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

		/** Used to match `RegExp` flags from their coerced string values. */
		var reFlags = /\w*$/;

		/** Used to detect host constructors (Safari). */
		var reIsHostCtor = /^\[object .+?Constructor\]$/;

		/** Used to detect unsigned integer values. */
		var reIsUint = /^(?:0|[1-9]\d*)$/;

		/** Used to identify `toStringTag` values supported by `_.clone`. */
		var cloneableTags = {};
		cloneableTags[argsTag] = cloneableTags[arrayTag] =
			cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
				cloneableTags[boolTag] = cloneableTags[dateTag] =
					cloneableTags[float32Tag] = cloneableTags[float64Tag] =
						cloneableTags[int8Tag] = cloneableTags[int16Tag] =
							cloneableTags[int32Tag] = cloneableTags[mapTag] =
								cloneableTags[numberTag] = cloneableTags[objectTag] =
									cloneableTags[regexpTag] = cloneableTags[setTag] =
										cloneableTags[stringTag] = cloneableTags[symbolTag] =
											cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
												cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
		cloneableTags[errorTag] = cloneableTags[funcTag] =
			cloneableTags[weakMapTag] = false;

		/** Detect free variable `global` from Node.js. */
		var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;

		/** Detect free variable `self`. */
		var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

		/** Used as a reference to the global object. */
		var root = freeGlobal || freeSelf || Function('return this')();

		/** Detect free variable `exports`. */
		var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;

		/** Detect free variable `module`. */
		var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;

		/** Detect the popular CommonJS extension `module.exports`. */
		var moduleExports = freeModule && freeModule.exports === freeExports;

		/**
		 * Adds the key-value `pair` to `map`.
		 *
		 * @private
		 * @param {Object} map The map to modify.
		 * @param {Array} pair The key-value pair to add.
		 * @returns {Object} Returns `map`.
		 */
		function addMapEntry(map, pair) {
			// Don't return `map.set` because it's not chainable in IE 11.
			map.set(pair[0], pair[1]);
			return map;
		}

		/**
		 * Adds `value` to `set`.
		 *
		 * @private
		 * @param {Object} set The set to modify.
		 * @param {*} value The value to add.
		 * @returns {Object} Returns `set`.
		 */
		function addSetEntry(set, value) {
			// Don't return `set.add` because it's not chainable in IE 11.
			set.add(value);
			return set;
		}

		/**
		 * A specialized version of `_.forEach` for arrays without support for
		 * iteratee shorthands.
		 *
		 * @private
		 * @param {Array} [array] The array to iterate over.
		 * @param {Function} iteratee The function invoked per iteration.
		 * @returns {Array} Returns `array`.
		 */
		function arrayEach(array, iteratee) {
			var index = -1,
				length = array ? array.length : 0;

			while (++index < length) {
				if (iteratee(array[index], index, array) === false) {
					break;
				}
			}
			return array;
		}

		/**
		 * Appends the elements of `values` to `array`.
		 *
		 * @private
		 * @param {Array} array The array to modify.
		 * @param {Array} values The values to append.
		 * @returns {Array} Returns `array`.
		 */
		function arrayPush(array, values) {
			var index = -1,
				length = values.length,
				offset = array.length;

			while (++index < length) {
				array[offset + index] = values[index];
			}
			return array;
		}

		/**
		 * A specialized version of `_.reduce` for arrays without support for
		 * iteratee shorthands.
		 *
		 * @private
		 * @param {Array} [array] The array to iterate over.
		 * @param {Function} iteratee The function invoked per iteration.
		 * @param {*} [accumulator] The initial value.
		 * @param {boolean} [initAccum] Specify using the first element of `array` as
		 *  the initial value.
		 * @returns {*} Returns the accumulated value.
		 */
		function arrayReduce(array, iteratee, accumulator, initAccum) {
			var index = -1,
				length = array ? array.length : 0;

			if (initAccum && length) {
				accumulator = array[++index];
			}
			while (++index < length) {
				accumulator = iteratee(accumulator, array[index], index, array);
			}
			return accumulator;
		}

		/**
		 * The base implementation of `_.times` without support for iteratee shorthands
		 * or max array length checks.
		 *
		 * @private
		 * @param {number} n The number of times to invoke `iteratee`.
		 * @param {Function} iteratee The function invoked per iteration.
		 * @returns {Array} Returns the array of results.
		 */
		function baseTimes(n, iteratee) {
			var index = -1,
				result = Array(n);

			while (++index < n) {
				result[index] = iteratee(index);
			}
			return result;
		}

		/**
		 * Gets the value at `key` of `object`.
		 *
		 * @private
		 * @param {Object} [object] The object to query.
		 * @param {string} key The key of the property to get.
		 * @returns {*} Returns the property value.
		 */
		function getValue(object, key) {
			return object == null ? undefined : object[key];
		}

		/**
		 * Checks if `value` is a host object in IE < 9.
		 *
		 * @private
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
		 */
		function isHostObject(value) {
			// Many host objects are `Object` objects that can coerce to strings
			// despite having improperly defined `toString` methods.
			var result = false;
			if (value != null && typeof value.toString != 'function') {
				try {
					result = !!(value + '');
				} catch (e) {}
			}
			return result;
		}

		/**
		 * Converts `map` to its key-value pairs.
		 *
		 * @private
		 * @param {Object} map The map to convert.
		 * @returns {Array} Returns the key-value pairs.
		 */
		function mapToArray(map) {
			var index = -1,
				result = Array(map.size);

			map.forEach(function(value, key) {
				result[++index] = [key, value];
			});
			return result;
		}

		/**
		 * Creates a unary function that invokes `func` with its argument transformed.
		 *
		 * @private
		 * @param {Function} func The function to wrap.
		 * @param {Function} transform The argument transform.
		 * @returns {Function} Returns the new function.
		 */
		function overArg(func, transform) {
			return function(arg) {
				return func(transform(arg));
			};
		}

		/**
		 * Converts `set` to an array of its values.
		 *
		 * @private
		 * @param {Object} set The set to convert.
		 * @returns {Array} Returns the values.
		 */
		function setToArray(set) {
			var index = -1,
				result = Array(set.size);

			set.forEach(function(value) {
				result[++index] = value;
			});
			return result;
		}

		/** Used for built-in method references. */
		var arrayProto = Array.prototype,
			funcProto = Function.prototype,
			objectProto = Object.prototype;

		/** Used to detect overreaching core-js shims. */
		var coreJsData = root['__core-js_shared__'];

		/** Used to detect methods masquerading as native. */
		var maskSrcKey = (function() {
			var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
			return uid ? ('Symbol(src)_1.' + uid) : '';
		}());

		/** Used to resolve the decompiled source of functions. */
		var funcToString = funcProto.toString;

		/** Used to check objects for own properties. */
		var hasOwnProperty = objectProto.hasOwnProperty;

		/**
		 * Used to resolve the
		 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
		 * of values.
		 */
		var objectToString = objectProto.toString;

		/** Used to detect if a method is native. */
		var reIsNative = RegExp('^' +
			funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
				.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
		);

		/** Built-in value references. */
		var Buffer = moduleExports ? root.Buffer : undefined,
			Symbol = root.Symbol,
			Uint8Array = root.Uint8Array,
			getPrototype = overArg(Object.getPrototypeOf, Object),
			objectCreate = Object.create,
			propertyIsEnumerable = objectProto.propertyIsEnumerable,
			splice = arrayProto.splice;

		/* Built-in method references for those with the same name as other `lodash` methods. */
		var nativeGetSymbols = Object.getOwnPropertySymbols,
			nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
			nativeKeys = overArg(Object.keys, Object);

		/* Built-in method references that are verified to be native. */
		var DataView = getNative(root, 'DataView'),
			Map = getNative(root, 'Map'),
			Promise = getNative(root, 'Promise'),
			Set = getNative(root, 'Set'),
			WeakMap = getNative(root, 'WeakMap'),
			nativeCreate = getNative(Object, 'create');

		/** Used to detect maps, sets, and weakmaps. */
		var dataViewCtorString = toSource(DataView),
			mapCtorString = toSource(Map),
			promiseCtorString = toSource(Promise),
			setCtorString = toSource(Set),
			weakMapCtorString = toSource(WeakMap);

		/** Used to convert symbols to primitives and strings. */
		var symbolProto = Symbol ? Symbol.prototype : undefined,
			symbolValueOf = symbolProto ? symbolProto.valueOf : undefined;

		/**
		 * Creates a hash object.
		 *
		 * @private
		 * @constructor
		 * @param {Array} [entries] The key-value pairs to cache.
		 */
		function Hash(entries) {
			var index = -1,
				length = entries ? entries.length : 0;

			this.clear();
			while (++index < length) {
				var entry = entries[index];
				this.set(entry[0], entry[1]);
			}
		}

		/**
		 * Removes all key-value entries from the hash.
		 *
		 * @private
		 * @name clear
		 * @memberOf Hash
		 */
		function hashClear() {
			this.__data__ = nativeCreate ? nativeCreate(null) : {};
		}

		/**
		 * Removes `key` and its value from the hash.
		 *
		 * @private
		 * @name delete
		 * @memberOf Hash
		 * @param {Object} hash The hash to modify.
		 * @param {string} key The key of the value to remove.
		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
		 */
		function hashDelete(key) {
			return this.has(key) && delete this.__data__[key];
		}

		/**
		 * Gets the hash value for `key`.
		 *
		 * @private
		 * @name get
		 * @memberOf Hash
		 * @param {string} key The key of the value to get.
		 * @returns {*} Returns the entry value.
		 */
		function hashGet(key) {
			var data = this.__data__;
			if (nativeCreate) {
				var result = data[key];
				return result === HASH_UNDEFINED ? undefined : result;
			}
			return hasOwnProperty.call(data, key) ? data[key] : undefined;
		}

		/**
		 * Checks if a hash value for `key` exists.
		 *
		 * @private
		 * @name has
		 * @memberOf Hash
		 * @param {string} key The key of the entry to check.
		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
		 */
		function hashHas(key) {
			var data = this.__data__;
			return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
		}

		/**
		 * Sets the hash `key` to `value`.
		 *
		 * @private
		 * @name set
		 * @memberOf Hash
		 * @param {string} key The key of the value to set.
		 * @param {*} value The value to set.
		 * @returns {Object} Returns the hash instance.
		 */
		function hashSet(key, value) {
			var data = this.__data__;
			data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
			return this;
		}

// Add methods to `Hash`.
		Hash.prototype.clear = hashClear;
		Hash.prototype['delete'] = hashDelete;
		Hash.prototype.get = hashGet;
		Hash.prototype.has = hashHas;
		Hash.prototype.set = hashSet;

		/**
		 * Creates an list cache object.
		 *
		 * @private
		 * @constructor
		 * @param {Array} [entries] The key-value pairs to cache.
		 */
		function ListCache(entries) {
			var index = -1,
				length = entries ? entries.length : 0;

			this.clear();
			while (++index < length) {
				var entry = entries[index];
				this.set(entry[0], entry[1]);
			}
		}

		/**
		 * Removes all key-value entries from the list cache.
		 *
		 * @private
		 * @name clear
		 * @memberOf ListCache
		 */
		function listCacheClear() {
			this.__data__ = [];
		}

		/**
		 * Removes `key` and its value from the list cache.
		 *
		 * @private
		 * @name delete
		 * @memberOf ListCache
		 * @param {string} key The key of the value to remove.
		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
		 */
		function listCacheDelete(key) {
			var data = this.__data__,
				index = assocIndexOf(data, key);

			if (index < 0) {
				return false;
			}
			var lastIndex = data.length - 1;
			if (index == lastIndex) {
				data.pop();
			} else {
				splice.call(data, index, 1);
			}
			return true;
		}

		/**
		 * Gets the list cache value for `key`.
		 *
		 * @private
		 * @name get
		 * @memberOf ListCache
		 * @param {string} key The key of the value to get.
		 * @returns {*} Returns the entry value.
		 */
		function listCacheGet(key) {
			var data = this.__data__,
				index = assocIndexOf(data, key);

			return index < 0 ? undefined : data[index][1];
		}

		/**
		 * Checks if a list cache value for `key` exists.
		 *
		 * @private
		 * @name has
		 * @memberOf ListCache
		 * @param {string} key The key of the entry to check.
		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
		 */
		function listCacheHas(key) {
			return assocIndexOf(this.__data__, key) > -1;
		}

		/**
		 * Sets the list cache `key` to `value`.
		 *
		 * @private
		 * @name set
		 * @memberOf ListCache
		 * @param {string} key The key of the value to set.
		 * @param {*} value The value to set.
		 * @returns {Object} Returns the list cache instance.
		 */
		function listCacheSet(key, value) {
			var data = this.__data__,
				index = assocIndexOf(data, key);

			if (index < 0) {
				data.push([key, value]);
			} else {
				data[index][1] = value;
			}
			return this;
		}

// Add methods to `ListCache`.
		ListCache.prototype.clear = listCacheClear;
		ListCache.prototype['delete'] = listCacheDelete;
		ListCache.prototype.get = listCacheGet;
		ListCache.prototype.has = listCacheHas;
		ListCache.prototype.set = listCacheSet;

		/**
		 * Creates a map cache object to store key-value pairs.
		 *
		 * @private
		 * @constructor
		 * @param {Array} [entries] The key-value pairs to cache.
		 */
		function MapCache(entries) {
			var index = -1,
				length = entries ? entries.length : 0;

			this.clear();
			while (++index < length) {
				var entry = entries[index];
				this.set(entry[0], entry[1]);
			}
		}

		/**
		 * Removes all key-value entries from the map.
		 *
		 * @private
		 * @name clear
		 * @memberOf MapCache
		 */
		function mapCacheClear() {
			this.__data__ = {
				'hash': new Hash,
				'map': new (Map || ListCache),
				'string': new Hash
			};
		}

		/**
		 * Removes `key` and its value from the map.
		 *
		 * @private
		 * @name delete
		 * @memberOf MapCache
		 * @param {string} key The key of the value to remove.
		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
		 */
		function mapCacheDelete(key) {
			return getMapData(this, key)['delete'](key);
		}

		/**
		 * Gets the map value for `key`.
		 *
		 * @private
		 * @name get
		 * @memberOf MapCache
		 * @param {string} key The key of the value to get.
		 * @returns {*} Returns the entry value.
		 */
		function mapCacheGet(key) {
			return getMapData(this, key).get(key);
		}

		/**
		 * Checks if a map value for `key` exists.
		 *
		 * @private
		 * @name has
		 * @memberOf MapCache
		 * @param {string} key The key of the entry to check.
		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
		 */
		function mapCacheHas(key) {
			return getMapData(this, key).has(key);
		}

		/**
		 * Sets the map `key` to `value`.
		 *
		 * @private
		 * @name set
		 * @memberOf MapCache
		 * @param {string} key The key of the value to set.
		 * @param {*} value The value to set.
		 * @returns {Object} Returns the map cache instance.
		 */
		function mapCacheSet(key, value) {
			getMapData(this, key).set(key, value);
			return this;
		}

// Add methods to `MapCache`.
		MapCache.prototype.clear = mapCacheClear;
		MapCache.prototype['delete'] = mapCacheDelete;
		MapCache.prototype.get = mapCacheGet;
		MapCache.prototype.has = mapCacheHas;
		MapCache.prototype.set = mapCacheSet;

		/**
		 * Creates a stack cache object to store key-value pairs.
		 *
		 * @private
		 * @constructor
		 * @param {Array} [entries] The key-value pairs to cache.
		 */
		function Stack(entries) {
			this.__data__ = new ListCache(entries);
		}

		/**
		 * Removes all key-value entries from the stack.
		 *
		 * @private
		 * @name clear
		 * @memberOf Stack
		 */
		function stackClear() {
			this.__data__ = new ListCache;
		}

		/**
		 * Removes `key` and its value from the stack.
		 *
		 * @private
		 * @name delete
		 * @memberOf Stack
		 * @param {string} key The key of the value to remove.
		 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
		 */
		function stackDelete(key) {
			return this.__data__['delete'](key);
		}

		/**
		 * Gets the stack value for `key`.
		 *
		 * @private
		 * @name get
		 * @memberOf Stack
		 * @param {string} key The key of the value to get.
		 * @returns {*} Returns the entry value.
		 */
		function stackGet(key) {
			return this.__data__.get(key);
		}

		/**
		 * Checks if a stack value for `key` exists.
		 *
		 * @private
		 * @name has
		 * @memberOf Stack
		 * @param {string} key The key of the entry to check.
		 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
		 */
		function stackHas(key) {
			return this.__data__.has(key);
		}

		/**
		 * Sets the stack `key` to `value`.
		 *
		 * @private
		 * @name set
		 * @memberOf Stack
		 * @param {string} key The key of the value to set.
		 * @param {*} value The value to set.
		 * @returns {Object} Returns the stack cache instance.
		 */
		function stackSet(key, value) {
			var cache = this.__data__;
			if (cache instanceof ListCache) {
				var pairs = cache.__data__;
				if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
					pairs.push([key, value]);
					return this;
				}
				cache = this.__data__ = new MapCache(pairs);
			}
			cache.set(key, value);
			return this;
		}

// Add methods to `Stack`.
		Stack.prototype.clear = stackClear;
		Stack.prototype['delete'] = stackDelete;
		Stack.prototype.get = stackGet;
		Stack.prototype.has = stackHas;
		Stack.prototype.set = stackSet;

		/**
		 * Creates an array of the enumerable property names of the array-like `value`.
		 *
		 * @private
		 * @param {*} value The value to query.
		 * @param {boolean} inherited Specify returning inherited property names.
		 * @returns {Array} Returns the array of property names.
		 */
		function arrayLikeKeys(value, inherited) {
			// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
			// Safari 9 makes `arguments.length` enumerable in strict mode.
			var result = (isArray(value) || isArguments(value))
				? baseTimes(value.length, String)
				: [];

			var length = result.length,
				skipIndexes = !!length;

			for (var key in value) {
				if ((inherited || hasOwnProperty.call(value, key)) &&
					!(skipIndexes && (key == 'length' || isIndex(key, length)))) {
					result.push(key);
				}
			}
			return result;
		}

		/**
		 * Assigns `value` to `key` of `object` if the existing value is not equivalent
		 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
		 * for equality comparisons.
		 *
		 * @private
		 * @param {Object} object The object to modify.
		 * @param {string} key The key of the property to assign.
		 * @param {*} value The value to assign.
		 */
		function assignValue(object, key, value) {
			var objValue = object[key];
			if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
				(value === undefined && !(key in object))) {
				object[key] = value;
			}
		}

		/**
		 * Gets the index at which the `key` is found in `array` of key-value pairs.
		 *
		 * @private
		 * @param {Array} array The array to inspect.
		 * @param {*} key The key to search for.
		 * @returns {number} Returns the index of the matched value, else `-1`.
		 */
		function assocIndexOf(array, key) {
			var length = array.length;
			while (length--) {
				if (eq(array[length][0], key)) {
					return length;
				}
			}
			return -1;
		}

		/**
		 * The base implementation of `_.assign` without support for multiple sources
		 * or `customizer` functions.
		 *
		 * @private
		 * @param {Object} object The destination object.
		 * @param {Object} source The source object.
		 * @returns {Object} Returns `object`.
		 */
		function baseAssign(object, source) {
			return object && copyObject(source, keys(source), object);
		}

		/**
		 * The base implementation of `_.clone` and `_.cloneDeep` which tracks
		 * traversed objects.
		 *
		 * @private
		 * @param {*} value The value to clone.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @param {boolean} [isFull] Specify a clone including symbols.
		 * @param {Function} [customizer] The function to customize cloning.
		 * @param {string} [key] The key of `value`.
		 * @param {Object} [object] The parent object of `value`.
		 * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
		 * @returns {*} Returns the cloned value.
		 */
		function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
			var result;
			if (customizer) {
				result = object ? customizer(value, key, object, stack) : customizer(value);
			}
			if (result !== undefined) {
				return result;
			}
			if (!isObject(value)) {
				return value;
			}
			var isArr = isArray(value);
			if (isArr) {
				result = initCloneArray(value);
				if (!isDeep) {
					return copyArray(value, result);
				}
			} else {
				var tag = getTag(value),
					isFunc = tag == funcTag || tag == genTag;

				if (isBuffer(value)) {
					return cloneBuffer(value, isDeep);
				}
				if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
					if (isHostObject(value)) {
						return object ? value : {};
					}
					result = initCloneObject(isFunc ? {} : value);
					if (!isDeep) {
						return copySymbols(value, baseAssign(result, value));
					}
				} else {
					if (!cloneableTags[tag]) {
						return object ? value : {};
					}
					result = initCloneByTag(value, tag, baseClone, isDeep);
				}
			}
			// Check for circular references and return its corresponding clone.
			stack || (stack = new Stack);
			var stacked = stack.get(value);
			if (stacked) {
				return stacked;
			}
			stack.set(value, result);

			if (!isArr) {
				var props = isFull ? getAllKeys(value) : keys(value);
			}
			arrayEach(props || value, function(subValue, key) {
				if (props) {
					key = subValue;
					subValue = value[key];
				}
				// Recursively populate clone (susceptible to call stack limits).
				assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
			});
			return result;
		}

		/**
		 * The base implementation of `_.create` without support for assigning
		 * properties to the created object.
		 *
		 * @private
		 * @param {Object} prototype The object to inherit from.
		 * @returns {Object} Returns the new object.
		 */
		function baseCreate(proto) {
			return isObject(proto) ? objectCreate(proto) : {};
		}

		/**
		 * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
		 * `keysFunc` and `symbolsFunc` to get the enumerable property names and
		 * symbols of `object`.
		 *
		 * @private
		 * @param {Object} object The object to query.
		 * @param {Function} keysFunc The function to get the keys of `object`.
		 * @param {Function} symbolsFunc The function to get the symbols of `object`.
		 * @returns {Array} Returns the array of property names and symbols.
		 */
		function baseGetAllKeys(object, keysFunc, symbolsFunc) {
			var result = keysFunc(object);
			return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
		}

		/**
		 * The base implementation of `getTag`.
		 *
		 * @private
		 * @param {*} value The value to query.
		 * @returns {string} Returns the `toStringTag`.
		 */
		function baseGetTag(value) {
			return objectToString.call(value);
		}

		/**
		 * The base implementation of `_.isNative` without bad shim checks.
		 *
		 * @private
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a native function,
		 *  else `false`.
		 */
		function baseIsNative(value) {
			if (!isObject(value) || isMasked(value)) {
				return false;
			}
			var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
			return pattern.test(toSource(value));
		}

		/**
		 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
		 *
		 * @private
		 * @param {Object} object The object to query.
		 * @returns {Array} Returns the array of property names.
		 */
		function baseKeys(object) {
			if (!isPrototype(object)) {
				return nativeKeys(object);
			}
			var result = [];
			for (var key in Object(object)) {
				if (hasOwnProperty.call(object, key) && key != 'constructor') {
					result.push(key);
				}
			}
			return result;
		}

		/**
		 * Creates a clone of  `buffer`.
		 *
		 * @private
		 * @param {Buffer} buffer The buffer to clone.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Buffer} Returns the cloned buffer.
		 */
		function cloneBuffer(buffer, isDeep) {
			if (isDeep) {
				return buffer.slice();
			}
			var result = new buffer.constructor(buffer.length);
			buffer.copy(result);
			return result;
		}

		/**
		 * Creates a clone of `arrayBuffer`.
		 *
		 * @private
		 * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
		 * @returns {ArrayBuffer} Returns the cloned array buffer.
		 */
		function cloneArrayBuffer(arrayBuffer) {
			var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
			new Uint8Array(result).set(new Uint8Array(arrayBuffer));
			return result;
		}

		/**
		 * Creates a clone of `dataView`.
		 *
		 * @private
		 * @param {Object} dataView The data view to clone.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Object} Returns the cloned data view.
		 */
		function cloneDataView(dataView, isDeep) {
			var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
			return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
		}

		/**
		 * Creates a clone of `map`.
		 *
		 * @private
		 * @param {Object} map The map to clone.
		 * @param {Function} cloneFunc The function to clone values.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Object} Returns the cloned map.
		 */
		function cloneMap(map, isDeep, cloneFunc) {
			var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
			return arrayReduce(array, addMapEntry, new map.constructor);
		}

		/**
		 * Creates a clone of `regexp`.
		 *
		 * @private
		 * @param {Object} regexp The regexp to clone.
		 * @returns {Object} Returns the cloned regexp.
		 */
		function cloneRegExp(regexp) {
			var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
			result.lastIndex = regexp.lastIndex;
			return result;
		}

		/**
		 * Creates a clone of `set`.
		 *
		 * @private
		 * @param {Object} set The set to clone.
		 * @param {Function} cloneFunc The function to clone values.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Object} Returns the cloned set.
		 */
		function cloneSet(set, isDeep, cloneFunc) {
			var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
			return arrayReduce(array, addSetEntry, new set.constructor);
		}

		/**
		 * Creates a clone of the `symbol` object.
		 *
		 * @private
		 * @param {Object} symbol The symbol object to clone.
		 * @returns {Object} Returns the cloned symbol object.
		 */
		function cloneSymbol(symbol) {
			return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
		}

		/**
		 * Creates a clone of `typedArray`.
		 *
		 * @private
		 * @param {Object} typedArray The typed array to clone.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Object} Returns the cloned typed array.
		 */
		function cloneTypedArray(typedArray, isDeep) {
			var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
			return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
		}

		/**
		 * Copies the values of `source` to `array`.
		 *
		 * @private
		 * @param {Array} source The array to copy values from.
		 * @param {Array} [array=[]] The array to copy values to.
		 * @returns {Array} Returns `array`.
		 */
		function copyArray(source, array) {
			var index = -1,
				length = source.length;

			array || (array = Array(length));
			while (++index < length) {
				array[index] = source[index];
			}
			return array;
		}

		/**
		 * Copies properties of `source` to `object`.
		 *
		 * @private
		 * @param {Object} source The object to copy properties from.
		 * @param {Array} props The property identifiers to copy.
		 * @param {Object} [object={}] The object to copy properties to.
		 * @param {Function} [customizer] The function to customize copied values.
		 * @returns {Object} Returns `object`.
		 */
		function copyObject(source, props, object, customizer) {
			object || (object = {});

			var index = -1,
				length = props.length;

			while (++index < length) {
				var key = props[index];

				var newValue = customizer
					? customizer(object[key], source[key], key, object, source)
					: undefined;

				assignValue(object, key, newValue === undefined ? source[key] : newValue);
			}
			return object;
		}

		/**
		 * Copies own symbol properties of `source` to `object`.
		 *
		 * @private
		 * @param {Object} source The object to copy symbols from.
		 * @param {Object} [object={}] The object to copy symbols to.
		 * @returns {Object} Returns `object`.
		 */
		function copySymbols(source, object) {
			return copyObject(source, getSymbols(source), object);
		}

		/**
		 * Creates an array of own enumerable property names and symbols of `object`.
		 *
		 * @private
		 * @param {Object} object The object to query.
		 * @returns {Array} Returns the array of property names and symbols.
		 */
		function getAllKeys(object) {
			return baseGetAllKeys(object, keys, getSymbols);
		}

		/**
		 * Gets the data for `map`.
		 *
		 * @private
		 * @param {Object} map The map to query.
		 * @param {string} key The reference key.
		 * @returns {*} Returns the map data.
		 */
		function getMapData(map, key) {
			var data = map.__data__;
			return isKeyable(key)
				? data[typeof key == 'string' ? 'string' : 'hash']
				: data.map;
		}

		/**
		 * Gets the native function at `key` of `object`.
		 *
		 * @private
		 * @param {Object} object The object to query.
		 * @param {string} key The key of the method to get.
		 * @returns {*} Returns the function if it's native, else `undefined`.
		 */
		function getNative(object, key) {
			var value = getValue(object, key);
			return baseIsNative(value) ? value : undefined;
		}

		/**
		 * Creates an array of the own enumerable symbol properties of `object`.
		 *
		 * @private
		 * @param {Object} object The object to query.
		 * @returns {Array} Returns the array of symbols.
		 */
		var getSymbols = nativeGetSymbols ? overArg(nativeGetSymbols, Object) : stubArray;

		/**
		 * Gets the `toStringTag` of `value`.
		 *
		 * @private
		 * @param {*} value The value to query.
		 * @returns {string} Returns the `toStringTag`.
		 */
		var getTag = baseGetTag;

// Fallback for data views, maps, sets, and weak maps in IE 11,
// for data views in Edge < 14, and promises in Node.js.
		if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
			(Map && getTag(new Map) != mapTag) ||
			(Promise && getTag(Promise.resolve()) != promiseTag) ||
			(Set && getTag(new Set) != setTag) ||
			(WeakMap && getTag(new WeakMap) != weakMapTag)) {
			getTag = function(value) {
				var result = objectToString.call(value),
					Ctor = result == objectTag ? value.constructor : undefined,
					ctorString = Ctor ? toSource(Ctor) : undefined;

				if (ctorString) {
					switch (ctorString) {
						case dataViewCtorString: return dataViewTag;
						case mapCtorString: return mapTag;
						case promiseCtorString: return promiseTag;
						case setCtorString: return setTag;
						case weakMapCtorString: return weakMapTag;
					}
				}
				return result;
			};
		}

		/**
		 * Initializes an array clone.
		 *
		 * @private
		 * @param {Array} array The array to clone.
		 * @returns {Array} Returns the initialized clone.
		 */
		function initCloneArray(array) {
			var length = array.length,
				result = array.constructor(length);

			// Add properties assigned by `RegExp#exec`.
			if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
				result.index = array.index;
				result.input = array.input;
			}
			return result;
		}

		/**
		 * Initializes an object clone.
		 *
		 * @private
		 * @param {Object} object The object to clone.
		 * @returns {Object} Returns the initialized clone.
		 */
		function initCloneObject(object) {
			return (typeof object.constructor == 'function' && !isPrototype(object))
				? baseCreate(getPrototype(object))
				: {};
		}

		/**
		 * Initializes an object clone based on its `toStringTag`.
		 *
		 * **Note:** This function only supports cloning values with tags of
		 * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
		 *
		 * @private
		 * @param {Object} object The object to clone.
		 * @param {string} tag The `toStringTag` of the object to clone.
		 * @param {Function} cloneFunc The function to clone values.
		 * @param {boolean} [isDeep] Specify a deep clone.
		 * @returns {Object} Returns the initialized clone.
		 */
		function initCloneByTag(object, tag, cloneFunc, isDeep) {
			var Ctor = object.constructor;
			switch (tag) {
				case arrayBufferTag:
					return cloneArrayBuffer(object);

				case boolTag:
				case dateTag:
					return new Ctor(+object);

				case dataViewTag:
					return cloneDataView(object, isDeep);

				case float32Tag: case float64Tag:
				case int8Tag: case int16Tag: case int32Tag:
				case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
				return cloneTypedArray(object, isDeep);

				case mapTag:
					return cloneMap(object, isDeep, cloneFunc);

				case numberTag:
				case stringTag:
					return new Ctor(object);

				case regexpTag:
					return cloneRegExp(object);

				case setTag:
					return cloneSet(object, isDeep, cloneFunc);

				case symbolTag:
					return cloneSymbol(object);
			}
		}

		/**
		 * Checks if `value` is a valid array-like index.
		 *
		 * @private
		 * @param {*} value The value to check.
		 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
		 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
		 */
		function isIndex(value, length) {
			length = length == null ? MAX_SAFE_INTEGER : length;
			return !!length &&
				(typeof value == 'number' || reIsUint.test(value)) &&
				(value > -1 && value % 1 == 0 && value < length);
		}

		/**
		 * Checks if `value` is suitable for use as unique object key.
		 *
		 * @private
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
		 */
		function isKeyable(value) {
			var type = typeof value;
			return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
				? (value !== '__proto__')
				: (value === null);
		}

		/**
		 * Checks if `func` has its source masked.
		 *
		 * @private
		 * @param {Function} func The function to check.
		 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
		 */
		function isMasked(func) {
			return !!maskSrcKey && (maskSrcKey in func);
		}

		/**
		 * Checks if `value` is likely a prototype object.
		 *
		 * @private
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
		 */
		function isPrototype(value) {
			var Ctor = value && value.constructor,
				proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

			return value === proto;
		}

		/**
		 * Converts `func` to its source code.
		 *
		 * @private
		 * @param {Function} func The function to process.
		 * @returns {string} Returns the source code.
		 */
		function toSource(func) {
			if (func != null) {
				try {
					return funcToString.call(func);
				} catch (e) {}
				try {
					return (func + '');
				} catch (e) {}
			}
			return '';
		}

		/**
		 * This method is like `_.clone` except that it recursively clones `value`.
		 *
		 * @static
		 * @memberOf _
		 * @since 1.0.0
		 * @category Lang
		 * @param {*} value The value to recursively clone.
		 * @returns {*} Returns the deep cloned value.
		 * @see _.clone
		 * @example
		 *
		 * var objects = [{ 'a': 1 }, { 'b': 2 }];
		 *
		 * var deep = _.cloneDeep(objects);
		 * console.log(deep[0] === objects[0]);
		 * // => false
		 */
		function cloneDeep(value) {
			return baseClone(value, true, true);
		}

		/**
		 * Performs a
		 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
		 * comparison between two values to determine if they are equivalent.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.0.0
		 * @category Lang
		 * @param {*} value The value to compare.
		 * @param {*} other The other value to compare.
		 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
		 * @example
		 *
		 * var object = { 'a': 1 };
		 * var other = { 'a': 1 };
		 *
		 * _.eq(object, object);
		 * // => true
		 *
		 * _.eq(object, other);
		 * // => false
		 *
		 * _.eq('a', 'a');
		 * // => true
		 *
		 * _.eq('a', Object('a'));
		 * // => false
		 *
		 * _.eq(NaN, NaN);
		 * // => true
		 */
		function eq(value, other) {
			return value === other || (value !== value && other !== other);
		}

		/**
		 * Checks if `value` is likely an `arguments` object.
		 *
		 * @static
		 * @memberOf _
		 * @since 0.1.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
		 *  else `false`.
		 * @example
		 *
		 * _.isArguments(function() { return arguments; }());
		 * // => true
		 *
		 * _.isArguments([1, 2, 3]);
		 * // => false
		 */
		function isArguments(value) {
			// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
			return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
				(!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
		}

		/**
		 * Checks if `value` is classified as an `Array` object.
		 *
		 * @static
		 * @memberOf _
		 * @since 0.1.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
		 * @example
		 *
		 * _.isArray([1, 2, 3]);
		 * // => true
		 *
		 * _.isArray(document.body.children);
		 * // => false
		 *
		 * _.isArray('abc');
		 * // => false
		 *
		 * _.isArray(_.noop);
		 * // => false
		 */
		var isArray = Array.isArray;

		/**
		 * Checks if `value` is array-like. A value is considered array-like if it's
		 * not a function and has a `value.length` that's an integer greater than or
		 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.0.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
		 * @example
		 *
		 * _.isArrayLike([1, 2, 3]);
		 * // => true
		 *
		 * _.isArrayLike(document.body.children);
		 * // => true
		 *
		 * _.isArrayLike('abc');
		 * // => true
		 *
		 * _.isArrayLike(_.noop);
		 * // => false
		 */
		function isArrayLike(value) {
			return value != null && isLength(value.length) && !isFunction(value);
		}

		/**
		 * This method is like `_.isArrayLike` except that it also checks if `value`
		 * is an object.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.0.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is an array-like object,
		 *  else `false`.
		 * @example
		 *
		 * _.isArrayLikeObject([1, 2, 3]);
		 * // => true
		 *
		 * _.isArrayLikeObject(document.body.children);
		 * // => true
		 *
		 * _.isArrayLikeObject('abc');
		 * // => false
		 *
		 * _.isArrayLikeObject(_.noop);
		 * // => false
		 */
		function isArrayLikeObject(value) {
			return isObjectLike(value) && isArrayLike(value);
		}

		/**
		 * Checks if `value` is a buffer.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.3.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
		 * @example
		 *
		 * _.isBuffer(new Buffer(2));
		 * // => true
		 *
		 * _.isBuffer(new Uint8Array(2));
		 * // => false
		 */
		var isBuffer = nativeIsBuffer || stubFalse;

		/**
		 * Checks if `value` is classified as a `Function` object.
		 *
		 * @static
		 * @memberOf _
		 * @since 0.1.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
		 * @example
		 *
		 * _.isFunction(_);
		 * // => true
		 *
		 * _.isFunction(/abc/);
		 * // => false
		 */
		function isFunction(value) {
			// The use of `Object#toString` avoids issues with the `typeof` operator
			// in Safari 8-9 which returns 'object' for typed array and other constructors.
			var tag = isObject(value) ? objectToString.call(value) : '';
			return tag == funcTag || tag == genTag;
		}

		/**
		 * Checks if `value` is a valid array-like length.
		 *
		 * **Note:** This method is loosely based on
		 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
		 *
		 * @static
		 * @memberOf _
		 * @since 4.0.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
		 * @example
		 *
		 * _.isLength(3);
		 * // => true
		 *
		 * _.isLength(Number.MIN_VALUE);
		 * // => false
		 *
		 * _.isLength(Infinity);
		 * // => false
		 *
		 * _.isLength('3');
		 * // => false
		 */
		function isLength(value) {
			return typeof value == 'number' &&
				value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
		}

		/**
		 * Checks if `value` is the
		 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
		 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
		 *
		 * @static
		 * @memberOf _
		 * @since 0.1.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
		 * @example
		 *
		 * _.isObject({});
		 * // => true
		 *
		 * _.isObject([1, 2, 3]);
		 * // => true
		 *
		 * _.isObject(_.noop);
		 * // => true
		 *
		 * _.isObject(null);
		 * // => false
		 */
		function isObject(value) {
			var type = typeof value;
			return !!value && (type == 'object' || type == 'function');
		}

		/**
		 * Checks if `value` is object-like. A value is object-like if it's not `null`
		 * and has a `typeof` result of "object".
		 *
		 * @static
		 * @memberOf _
		 * @since 4.0.0
		 * @category Lang
		 * @param {*} value The value to check.
		 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
		 * @example
		 *
		 * _.isObjectLike({});
		 * // => true
		 *
		 * _.isObjectLike([1, 2, 3]);
		 * // => true
		 *
		 * _.isObjectLike(_.noop);
		 * // => false
		 *
		 * _.isObjectLike(null);
		 * // => false
		 */
		function isObjectLike(value) {
			return !!value && typeof value == 'object';
		}

		/**
		 * Creates an array of the own enumerable property names of `object`.
		 *
		 * **Note:** Non-object values are coerced to objects. See the
		 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
		 * for more details.
		 *
		 * @static
		 * @since 0.1.0
		 * @memberOf _
		 * @category Object
		 * @param {Object} object The object to query.
		 * @returns {Array} Returns the array of property names.
		 * @example
		 *
		 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
		 *
		 * Foo.prototype.c = 3;
		 *
		 * _.keys(new Foo);
		 * // => ['a', 'b'] (iteration order is not guaranteed)
		 *
		 * _.keys('hi');
		 * // => ['0', '1']
		 */
		function keys(object) {
			return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
		}

		/**
		 * This method returns a new empty array.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.13.0
		 * @category Util
		 * @returns {Array} Returns the new empty array.
		 * @example
		 *
		 * var arrays = _.times(2, _.stubArray);
		 *
		 * console.log(arrays);
		 * // => [[], []]
		 *
		 * console.log(arrays[0] === arrays[1]);
		 * // => false
		 */
		function stubArray() {
			return [];
		}

		/**
		 * This method returns `false`.
		 *
		 * @static
		 * @memberOf _
		 * @since 4.13.0
		 * @category Util
		 * @returns {boolean} Returns `false`.
		 * @example
		 *
		 * _.times(2, _.stubFalse);
		 * // => [false, false]
		 */
		function stubFalse() {
			return false;
		}

		module.exports = cloneDeep;

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],48:[function(require,module,exports){
	var support = require('webrtcsupport');


	function GainController(stream) {
		this.support = support.webAudio && support.mediaStream;

		// set our starting value
		this.gain = 1;

		if (this.support) {
			var context = this.context = new support.AudioContext();
			this.microphone = context.createMediaStreamSource(stream);
			this.gainFilter = context.createGain();
			this.destination = context.createMediaStreamDestination();
			this.outputStream = this.destination.stream;
			this.microphone.connect(this.gainFilter);
			this.gainFilter.connect(this.destination);
			stream.addTrack(this.outputStream.getAudioTracks()[0]);
			stream.removeTrack(stream.getAudioTracks()[0]);
		}
		this.stream = stream;
	}

// setting
	GainController.prototype.setGain = function (val) {
		// check for support
		if (!this.support) return;
		this.gainFilter.gain.value = val;
		this.gain = val;
	};

	GainController.prototype.getGain = function () {
		return this.gain;
	};

	GainController.prototype.off = function () {
		return this.setGain(0);
	};

	GainController.prototype.on = function () {
		this.setGain(1);
	};


	module.exports = GainController;

},{"webrtcsupport":49}],49:[function(require,module,exports){
// created by @HenrikJoreteg
	var prefix;
	var version;

	if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
		prefix = 'moz';
		version = navigator.userAgent.match(/Firefox/) && parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
	} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
		prefix = 'webkit';
		version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
	}

	var PC = window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
	var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
	var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
	var MediaStream = window.webkitMediaStream || window.MediaStream;
	var screenSharing = window.location.protocol === 'https:' &&
		((prefix === 'webkit' && version >= 26) ||
		(prefix === 'moz' && version >= 33))
	var AudioContext = window.AudioContext || window.webkitAudioContext;
	var videoEl = document.createElement('video');
	var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
	var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;

// export support flags and constructors.prototype && PC
	module.exports = {
		prefix: prefix,
		browserVersion: version,
		support: !!PC && supportVp8 && !!getUserMedia,
		// new support style
		supportRTCPeerConnection: !!PC,
		supportVp8: supportVp8,
		supportGetUserMedia: !!getUserMedia,
		supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
		supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
		supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
		supportScreenSharing: screenSharing,
		// old deprecated style. Dont use this anymore
		dataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
		webAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
		mediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
		screenSharing: screenSharing,
		// constructors
		AudioContext: AudioContext,
		PeerConnection: PC,
		SessionDescription: SessionDescription,
		IceCandidate: IceCandidate,
		MediaStream: MediaStream,
		getUserMedia: getUserMedia
	};

},{}],50:[function(require,module,exports){
	var methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",");
	var l = methods.length;
	var fn = function () {};
	var mockconsole = {};

	while (l--) {
		mockconsole[methods[l]] = fn;
	}

	module.exports = mockconsole;

},{}],51:[function(require,module,exports){

	/**
	 * HOP ref.
	 */

	var has = Object.prototype.hasOwnProperty;

	/**
	 * Return own keys in `obj`.
	 *
	 * @param {Object} obj
	 * @return {Array}
	 * @api public
	 */

	exports.keys = Object.keys || function(obj){
			var keys = [];
			for (var key in obj) {
				if (has.call(obj, key)) {
					keys.push(key);
				}
			}
			return keys;
		};

	/**
	 * Return own values in `obj`.
	 *
	 * @param {Object} obj
	 * @return {Array}
	 * @api public
	 */

	exports.values = function(obj){
		var vals = [];
		for (var key in obj) {
			if (has.call(obj, key)) {
				vals.push(obj[key]);
			}
		}
		return vals;
	};

	/**
	 * Merge `b` into `a`.
	 *
	 * @param {Object} a
	 * @param {Object} b
	 * @return {Object} a
	 * @api public
	 */

	exports.merge = function(a, b){
		for (var key in b) {
			if (has.call(b, key)) {
				a[key] = b[key];
			}
		}
		return a;
	};

	/**
	 * Return length of `obj`.
	 *
	 * @param {Object} obj
	 * @return {Number}
	 * @api public
	 */

	exports.length = function(obj){
		return exports.keys(obj).length;
	};

	/**
	 * Check if `obj` is empty.
	 *
	 * @param {Object} obj
	 * @return {Boolean}
	 * @api public
	 */

	exports.isEmpty = function(obj){
		return 0 == exports.length(obj);
	};
},{}],52:[function(require,module,exports){
	(function (global){
		/**
		 * JSON parse.
		 *
		 * @see Based on jQuery#parseJSON (MIT) and JSON2
		 * @api private
		 */

		var rvalidchars = /^[\],:{}\s]*$/;
		var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
		var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
		var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
		var rtrimLeft = /^\s+/;
		var rtrimRight = /\s+$/;

		module.exports = function parsejson(data) {
			if ('string' != typeof data || !data) {
				return null;
			}

			data = data.replace(rtrimLeft, '').replace(rtrimRight, '');

			// Attempt to parse using the native JSON parser first
			if (global.JSON && JSON.parse) {
				return JSON.parse(data);
			}

			if (rvalidchars.test(data.replace(rvalidescape, '@')
					.replace(rvalidtokens, ']')
					.replace(rvalidbraces, ''))) {
				return (new Function('return ' + data))();
			}
		};
	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],53:[function(require,module,exports){
	/**
	 * Compiles a querystring
	 * Returns string representation of the object
	 *
	 * @param {Object}
	 * @api private
	 */

	exports.encode = function (obj) {
		var str = '';

		for (var i in obj) {
			if (obj.hasOwnProperty(i)) {
				if (str.length) str += '&';
				str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
			}
		}

		return str;
	};

	/**
	 * Parses a simple querystring into an object
	 *
	 * @param {String} qs
	 * @api private
	 */

	exports.decode = function(qs){
		var qry = {};
		var pairs = qs.split('&');
		for (var i = 0, l = pairs.length; i < l; i++) {
			var pair = pairs[i].split('=');
			qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
		}
		return qry;
	};

},{}],54:[function(require,module,exports){
	/**
	 * Parses an URI
	 *
	 * @author Steven Levithan <stevenlevithan.com> (MIT license)
	 * @api private
	 */

	var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

	var parts = [
		'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host'
		, 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
	];

	module.exports = function parseuri(str) {
		var m = re.exec(str || '')
			, uri = {}
			, i = 14;

		while (i--) {
			uri[parts[i]] = m[i] || '';
		}

		return uri;
	};

},{}],55:[function(require,module,exports){
// shim for using process in browser
	var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

	var cachedSetTimeout;
	var cachedClearTimeout;

	function defaultSetTimout() {
		throw new Error('setTimeout has not been defined');
	}
	function defaultClearTimeout () {
		throw new Error('clearTimeout has not been defined');
	}
	(function () {
		try {
			if (typeof setTimeout === 'function') {
				cachedSetTimeout = setTimeout;
			} else {
				cachedSetTimeout = defaultSetTimout;
			}
		} catch (e) {
			cachedSetTimeout = defaultSetTimout;
		}
		try {
			if (typeof clearTimeout === 'function') {
				cachedClearTimeout = clearTimeout;
			} else {
				cachedClearTimeout = defaultClearTimeout;
			}
		} catch (e) {
			cachedClearTimeout = defaultClearTimeout;
		}
	} ())
	function runTimeout(fun) {
		if (cachedSetTimeout === setTimeout) {
			//normal enviroments in sane situations
			return setTimeout(fun, 0);
		}
		// if setTimeout wasn't available but was latter defined
		if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
			cachedSetTimeout = setTimeout;
			return setTimeout(fun, 0);
		}
		try {
			// when when somebody has screwed with setTimeout but no I.E. maddness
			return cachedSetTimeout(fun, 0);
		} catch(e){
			try {
				// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
				return cachedSetTimeout.call(null, fun, 0);
			} catch(e){
				// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
				return cachedSetTimeout.call(this, fun, 0);
			}
		}


	}
	function runClearTimeout(marker) {
		if (cachedClearTimeout === clearTimeout) {
			//normal enviroments in sane situations
			return clearTimeout(marker);
		}
		// if clearTimeout wasn't available but was latter defined
		if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
			cachedClearTimeout = clearTimeout;
			return clearTimeout(marker);
		}
		try {
			// when when somebody has screwed with setTimeout but no I.E. maddness
			return cachedClearTimeout(marker);
		} catch (e){
			try {
				// When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
				return cachedClearTimeout.call(null, marker);
			} catch (e){
				// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
				// Some versions of I.E. have different rules for clearTimeout vs setTimeout
				return cachedClearTimeout.call(this, marker);
			}
		}



	}
	var queue = [];
	var draining = false;
	var currentQueue;
	var queueIndex = -1;

	function cleanUpNextTick() {
		if (!draining || !currentQueue) {
			return;
		}
		draining = false;
		if (currentQueue.length) {
			queue = currentQueue.concat(queue);
		} else {
			queueIndex = -1;
		}
		if (queue.length) {
			drainQueue();
		}
	}

	function drainQueue() {
		if (draining) {
			return;
		}
		var timeout = runTimeout(cleanUpNextTick);
		draining = true;

		var len = queue.length;
		while(len) {
			currentQueue = queue;
			queue = [];
			while (++queueIndex < len) {
				if (currentQueue) {
					currentQueue[queueIndex].run();
				}
			}
			queueIndex = -1;
			len = queue.length;
		}
		currentQueue = null;
		draining = false;
		runClearTimeout(timeout);
	}

	process.nextTick = function (fun) {
		var args = new Array(arguments.length - 1);
		if (arguments.length > 1) {
			for (var i = 1; i < arguments.length; i++) {
				args[i - 1] = arguments[i];
			}
		}
		queue.push(new Item(fun, args));
		if (queue.length === 1 && !draining) {
			runTimeout(drainQueue);
		}
	};

// v8 likes predictible objects
	function Item(fun, array) {
		this.fun = fun;
		this.array = array;
	}
	Item.prototype.run = function () {
		this.fun.apply(null, this.array);
	};
	process.title = 'browser';
	process.browser = true;
	process.env = {};
	process.argv = [];
	process.version = ''; // empty string to avoid regexp issues
	process.versions = {};

	function noop() {}

	process.on = noop;
	process.addListener = noop;
	process.once = noop;
	process.off = noop;
	process.removeListener = noop;
	process.removeAllListeners = noop;
	process.emit = noop;

	process.binding = function (name) {
		throw new Error('process.binding is not supported');
	};

	process.cwd = function () { return '/' };
	process.chdir = function (dir) {
		throw new Error('process.chdir is not supported');
	};
	process.umask = function() { return 0; };

},{}],56:[function(require,module,exports){
	var util = require('util');
	var SJJ = require('sdp-jingle-json');
	var WildEmitter = require('wildemitter');
	var Peerconn = require('traceablepeerconnection');
	var adapter = require('webrtc-adapter');
	var cloneDeep = require('lodash.clonedeep');

	function PeerConnection(config, constraints) {
		var self = this;
		var item;
		WildEmitter.call(this);

		config = config || {};
		config.iceServers = config.iceServers || [];

		var detectedBrowser = adapter.browserDetails.browser;

		// make sure this only gets enabled in Google Chrome
		// EXPERIMENTAL FLAG, might get removed without notice
		this.enableChromeNativeSimulcast = false;
		if (constraints && constraints.optional &&
			detectedBrowser === 'chrome' &&
			navigator.appVersion.match(/Chromium\//) === null) {
			constraints.optional.forEach(function (constraint) {
				if (constraint.enableChromeNativeSimulcast) {
					self.enableChromeNativeSimulcast = true;
				}
			});
		}

		// EXPERIMENTAL FLAG, might get removed without notice
		this.enableMultiStreamHacks = false;
		if (constraints && constraints.optional &&
			detectedBrowser === 'chrome') {
			constraints.optional.forEach(function (constraint) {
				if (constraint.enableMultiStreamHacks) {
					self.enableMultiStreamHacks = true;
				}
			});
		}
		// EXPERIMENTAL FLAG, might get removed without notice
		this.restrictBandwidth = 0;
		if (constraints && constraints.optional) {
			constraints.optional.forEach(function (constraint) {
				if (constraint.andyetRestrictBandwidth) {
					self.restrictBandwidth = constraint.andyetRestrictBandwidth;
				}
			});
		}

		// EXPERIMENTAL FLAG, might get removed without notice
		// bundle up ice candidates, only works for jingle mode
		// number > 0 is the delay to wait for additional candidates
		// ~20ms seems good
		this.batchIceCandidates = 0;
		if (constraints && constraints.optional) {
			constraints.optional.forEach(function (constraint) {
				if (constraint.andyetBatchIce) {
					self.batchIceCandidates = constraint.andyetBatchIce;
				}
			});
		}
		this.batchedIceCandidates = [];

		// EXPERIMENTAL FLAG, might get removed without notice
		// this attemps to strip out candidates with an already known foundation
		// and type -- i.e. those which are gathered via the same TURN server
		// but different transports (TURN udp, tcp and tls respectively)
		if (constraints && constraints.optional && detectedBrowser === 'chrome') {
			constraints.optional.forEach(function (constraint) {
				if (constraint.andyetFasterICE) {
					self.eliminateDuplicateCandidates = constraint.andyetFasterICE;
				}
			});
		}
		// EXPERIMENTAL FLAG, might get removed without notice
		// when using a server such as the jitsi videobridge we don't need to signal
		// our candidates
		if (constraints && constraints.optional) {
			constraints.optional.forEach(function (constraint) {
				if (constraint.andyetDontSignalCandidates) {
					self.dontSignalCandidates = constraint.andyetDontSignalCandidates;
				}
			});
		}


		// EXPERIMENTAL FLAG, might get removed without notice
		this.assumeSetLocalSuccess = false;
		if (constraints && constraints.optional) {
			constraints.optional.forEach(function (constraint) {
				if (constraint.andyetAssumeSetLocalSuccess) {
					self.assumeSetLocalSuccess = constraint.andyetAssumeSetLocalSuccess;
				}
			});
		}

		// EXPERIMENTAL FLAG, might get removed without notice
		// working around https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
		// pass in a timeout for this
		if (detectedBrowser === 'firefox') {
			if (constraints && constraints.optional) {
				this.wtFirefox = 0;
				constraints.optional.forEach(function (constraint) {
					if (constraint.andyetFirefoxMakesMeSad) {
						self.wtFirefox = constraint.andyetFirefoxMakesMeSad;
						if (self.wtFirefox > 0) {
							self.firefoxcandidatebuffer = [];
						}
					}
				});
			}
		}


		this.pc = new Peerconn(config, constraints);

		this.getLocalStreams = this.pc.getLocalStreams.bind(this.pc);
		this.getRemoteStreams = this.pc.getRemoteStreams.bind(this.pc);
		this.addStream = this.pc.addStream.bind(this.pc);
		this.removeStream = this.pc.removeStream.bind(this.pc);

		// proxy events
		this.pc.on('*', function () {
			self.emit.apply(self, arguments);
		});

		// proxy some events directly
		this.pc.onremovestream = this.emit.bind(this, 'removeStream');
		this.pc.onaddstream = this.emit.bind(this, 'addStream');
		this.pc.onnegotiationneeded = this.emit.bind(this, 'negotiationNeeded');
		this.pc.oniceconnectionstatechange = this.emit.bind(this, 'iceConnectionStateChange');
		this.pc.onsignalingstatechange = this.emit.bind(this, 'signalingStateChange');

		// handle ice candidate and data channel events
		this.pc.onicecandidate = this._onIce.bind(this);
		this.pc.ondatachannel = this._onDataChannel.bind(this);

		this.localDescription = {
			contents: []
		};
		this.remoteDescription = {
			contents: []
		};

		this.config = {
			debug: false,
			sid: '',
			isInitiator: true,
			sdpSessionID: Date.now(),
			useJingle: false
		};

		this.iceCredentials = {
			local: {},
			remote: {}
		};

		// apply our config
		for (item in config) {
			this.config[item] = config[item];
		}

		if (this.config.debug) {
			this.on('*', function () {
				var logger = config.logger || console;
				logger.log('PeerConnection event:', arguments);
			});
		}
		this.hadLocalStunCandidate = false;
		this.hadRemoteStunCandidate = false;
		this.hadLocalRelayCandidate = false;
		this.hadRemoteRelayCandidate = false;

		this.hadLocalIPv6Candidate = false;
		this.hadRemoteIPv6Candidate = false;

		// keeping references for all our data channels
		// so they dont get garbage collected
		// can be removed once the following bugs have been fixed
		// https://crbug.com/405545
		// https://bugzilla.mozilla.org/show_bug.cgi?id=964092
		// to be filed for opera
		this._remoteDataChannels = [];
		this._localDataChannels = [];

		this._candidateBuffer = [];
	}

	util.inherits(PeerConnection, WildEmitter);

	Object.defineProperty(PeerConnection.prototype, 'signalingState', {
		get: function () {
			return this.pc.signalingState;
		}
	});
	Object.defineProperty(PeerConnection.prototype, 'iceConnectionState', {
		get: function () {
			return this.pc.iceConnectionState;
		}
	});

	PeerConnection.prototype._role = function () {
		return this.isInitiator ? 'initiator' : 'responder';
	};

// Add a stream to the peer connection object
	PeerConnection.prototype.addStream = function (stream) {
		this.localStream = stream;
		this.pc.addStream(stream);
	};

// helper function to check if a remote candidate is a stun/relay
// candidate or an ipv6 candidate
	PeerConnection.prototype._checkLocalCandidate = function (candidate) {
		var cand = SJJ.toCandidateJSON(candidate);
		if (cand.type == 'srflx') {
			this.hadLocalStunCandidate = true;
		} else if (cand.type == 'relay') {
			this.hadLocalRelayCandidate = true;
		}
		if (cand.ip.indexOf(':') != -1) {
			this.hadLocalIPv6Candidate = true;
		}
	};

// helper function to check if a remote candidate is a stun/relay
// candidate or an ipv6 candidate
	PeerConnection.prototype._checkRemoteCandidate = function (candidate) {
		var cand = SJJ.toCandidateJSON(candidate);
		if (cand.type == 'srflx') {
			this.hadRemoteStunCandidate = true;
		} else if (cand.type == 'relay') {
			this.hadRemoteRelayCandidate = true;
		}
		if (cand.ip.indexOf(':') != -1) {
			this.hadRemoteIPv6Candidate = true;
		}
	};


// Init and add ice candidate object with correct constructor
	PeerConnection.prototype.processIce = function (update, cb) {
		cb = cb || function () {};
		var self = this;

		// ignore any added ice candidates to avoid errors. why does the
		// spec not do this?
		if (this.pc.signalingState === 'closed') return cb();

		if (update.contents || (update.jingle && update.jingle.contents)) {
			var contentNames = this.remoteDescription.contents.map(function (c) { return c.name; });
			var contents = update.contents || update.jingle.contents;

			contents.forEach(function (content) {
				var transport = content.transport || {};
				var candidates = transport.candidates || [];
				var mline = contentNames.indexOf(content.name);
				var mid = content.name;
				var remoteContent = self.remoteDescription.contents.find(function (c) {
					return c.name === content.name;
				});

				// process candidates as a callback, in case we need to
				// update ufrag and pwd with offer/answer
				var processCandidates = function () {
					candidates.forEach(
						function (candidate) {
							var iceCandidate = SJJ.toCandidateSDP(candidate) + '\r\n';
							self.pc.addIceCandidate(
								new RTCIceCandidate({
									candidate: iceCandidate,
									sdpMLineIndex: mline,
									sdpMid: mid
								}), function () {
									// well, this success callback is pretty meaningless
								},
								function (err) {
									self.emit('error', err);
								}
							);
							self._checkRemoteCandidate(iceCandidate);
						});
					cb();
				};

				if (self.iceCredentials.remote[content.name] && transport.ufrag &&
					self.iceCredentials.remote[content.name].ufrag !== transport.ufrag) {
					if (remoteContent) {
						remoteContent.transport.ufrag = transport.ufrag;
						remoteContent.transport.pwd = transport.pwd;
						var offer = {
							type: 'offer',
							jingle: self.remoteDescription
						};
						offer.sdp = SJJ.toSessionSDP(offer.jingle, {
							sid: self.config.sdpSessionID,
							role: self._role(),
							direction: 'incoming'
						});
						self.pc.setRemoteDescription(new RTCSessionDescription(offer),
							function () {
								processCandidates();
							},
							function (err) {
								self.emit('error', err);
							}
						);
					} else {
						self.emit('error', 'ice restart failed to find matching content');
					}
				} else {
					processCandidates();
				}
			});
		} else {
			// working around https://code.google.com/p/webrtc/issues/detail?id=3669
			if (update.candidate && update.candidate.candidate.indexOf('a=') !== 0) {
				update.candidate.candidate = 'a=' + update.candidate.candidate;
			}

			if (this.wtFirefox && this.firefoxcandidatebuffer !== null) {
				// we cant add this yet due to https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
				if (this.pc.localDescription && this.pc.localDescription.type === 'offer') {
					this.firefoxcandidatebuffer.push(update.candidate);
					return cb();
				}
			}

			self.pc.addIceCandidate(
				new RTCIceCandidate(update.candidate),
				function () { },
				function (err) {
					self.emit('error', err);
				}
			);
			self._checkRemoteCandidate(update.candidate.candidate);
			cb();
		}
	};

// Generate and emit an offer with the given constraints
	PeerConnection.prototype.offer = function (constraints, cb) {
		var self = this;
		var hasConstraints = arguments.length === 2;
		var mediaConstraints = hasConstraints && constraints ? constraints : {
				offerToReceiveAudio: 1,
				offerToReceiveVideo: 1
			};
		cb = hasConstraints ? cb : constraints;
		cb = cb || function () {};

		if (this.pc.signalingState === 'closed') return cb('Already closed');

		// Actually generate the offer
		this.pc.createOffer(
			function (offer) {
				// does not work for jingle, but jingle.js doesn't need
				// this hack...
				var expandedOffer = {
					type: 'offer',
					sdp: offer.sdp
				};
				if (self.assumeSetLocalSuccess) {
					self.emit('offer', expandedOffer);
					cb(null, expandedOffer);
				}
				self._candidateBuffer = [];
				self.pc.setLocalDescription(offer,
					function () {
						var jingle;
						if (self.config.useJingle) {
							jingle = SJJ.toSessionJSON(offer.sdp, {
								role: self._role(),
								direction: 'outgoing'
							});
							jingle.sid = self.config.sid;
							self.localDescription = jingle;

							// Save ICE credentials
							jingle.contents.forEach(function (content) {
								var transport = content.transport || {};
								if (transport.ufrag) {
									self.iceCredentials.local[content.name] = {
										ufrag: transport.ufrag,
										pwd: transport.pwd
									};
								}
							});

							expandedOffer.jingle = jingle;
						}
						expandedOffer.sdp.split('\r\n').forEach(function (line) {
							if (line.indexOf('a=candidate:') === 0) {
								self._checkLocalCandidate(line);
							}
						});

						if (!self.assumeSetLocalSuccess) {
							self.emit('offer', expandedOffer);
							cb(null, expandedOffer);
						}
					},
					function (err) {
						self.emit('error', err);
						cb(err);
					}
				);
			},
			function (err) {
				self.emit('error', err);
				cb(err);
			},
			mediaConstraints
		);
	};


// Process an incoming offer so that ICE may proceed before deciding
// to answer the request.
	PeerConnection.prototype.handleOffer = function (offer, cb) {
		cb = cb || function () {};
		var self = this;
		offer.type = 'offer';
		if (offer.jingle) {
			if (this.enableChromeNativeSimulcast) {
				offer.jingle.contents.forEach(function (content) {
					if (content.name === 'video') {
						content.application.googConferenceFlag = true;
					}

				});
			}
			if (this.enableMultiStreamHacks) {
				// add a mixed video stream as first stream
				offer.jingle.contents.forEach(function (content) {
					if (content.name === 'video') {
						var sources = content.application.sources || [];
						if (sources.length === 0 || sources[0].ssrc !== "3735928559") {
							sources.unshift({
								ssrc: "3735928559", // 0xdeadbeef
								parameters: [
									{
										key: "cname",
										value: "deadbeef"
									},
									{
										key: "msid",
										value: "mixyourfecintothis please"
									}
								]
							});
							content.application.sources = sources;
						}
					}
				});
			}
			if (self.restrictBandwidth > 0) {
				if (offer.jingle.contents.length >= 2 && offer.jingle.contents[1].name === 'video') {
					var content = offer.jingle.contents[1];
					var hasBw = content.application && content.application.bandwidth && content.application.bandwidth.bandwidth;
					if (!hasBw) {
						offer.jingle.contents[1].application.bandwidth = { type: 'AS', bandwidth: self.restrictBandwidth.toString() };
						offer.sdp = SJJ.toSessionSDP(offer.jingle, {
							sid: self.config.sdpSessionID,
							role: self._role(),
							direction: 'outgoing'
						});
					}
				}
			}
			// Save ICE credentials
			offer.jingle.contents.forEach(function (content) {
				var transport = content.transport || {};
				if (transport.ufrag) {
					self.iceCredentials.remote[content.name] = {
						ufrag: transport.ufrag,
						pwd: transport.pwd
					};
				}
			});
			offer.sdp = SJJ.toSessionSDP(offer.jingle, {
				sid: self.config.sdpSessionID,
				role: self._role(),
				direction: 'incoming'
			});
			self.remoteDescription = offer.jingle;
		}
		offer.sdp.split('\r\n').forEach(function (line) {
			if (line.indexOf('a=candidate:') === 0) {
				self._checkRemoteCandidate(line);
			}
		});
		self.pc.setRemoteDescription(new RTCSessionDescription(offer),
			function () {
				cb();
			},
			cb
		);
	};

// Answer an offer with audio only
	PeerConnection.prototype.answerAudioOnly = function (cb) {
		var mediaConstraints = {
			mandatory: {
				OfferToReceiveAudio: true,
				OfferToReceiveVideo: false
			}
		};
		this._answer(mediaConstraints, cb);
	};

// Answer an offer without offering to recieve
	PeerConnection.prototype.answerBroadcastOnly = function (cb) {
		var mediaConstraints = {
			mandatory: {
				OfferToReceiveAudio: false,
				OfferToReceiveVideo: false
			}
		};
		this._answer(mediaConstraints, cb);
	};

// Answer an offer with given constraints default is audio/video
	PeerConnection.prototype.answer = function (constraints, cb) {
		var hasConstraints = arguments.length === 2;
		var callback = hasConstraints ? cb : constraints;
		var mediaConstraints = hasConstraints && constraints ? constraints : {
				mandatory: {
					OfferToReceiveAudio: true,
					OfferToReceiveVideo: true
				}
			};

		this._answer(mediaConstraints, callback);
	};

// Process an answer
	PeerConnection.prototype.handleAnswer = function (answer, cb) {
		cb = cb || function () {};
		var self = this;
		if (answer.jingle) {
			answer.sdp = SJJ.toSessionSDP(answer.jingle, {
				sid: self.config.sdpSessionID,
				role: self._role(),
				direction: 'incoming'
			});
			self.remoteDescription = answer.jingle;

			// Save ICE credentials
			answer.jingle.contents.forEach(function (content) {
				var transport = content.transport || {};
				if (transport.ufrag) {
					self.iceCredentials.remote[content.name] = {
						ufrag: transport.ufrag,
						pwd: transport.pwd
					};
				}
			});
		}
		answer.sdp.split('\r\n').forEach(function (line) {
			if (line.indexOf('a=candidate:') === 0) {
				self._checkRemoteCandidate(line);
			}
		});
		self.pc.setRemoteDescription(
			new RTCSessionDescription(answer),
			function () {
				if (self.wtFirefox) {
					window.setTimeout(function () {
						self.firefoxcandidatebuffer.forEach(function (candidate) {
							// add candidates later
							self.pc.addIceCandidate(
								new RTCIceCandidate(candidate),
								function () { },
								function (err) {
									self.emit('error', err);
								}
							);
							self._checkRemoteCandidate(candidate.candidate);
						});
						self.firefoxcandidatebuffer = null;
					}, self.wtFirefox);
				}
				cb(null);
			},
			cb
		);
	};

// Close the peer connection
	PeerConnection.prototype.close = function () {
		this.pc.close();

		this._localDataChannels = [];
		this._remoteDataChannels = [];

		this.emit('close');
	};

// Internal code sharing for various types of answer methods
	PeerConnection.prototype._answer = function (constraints, cb) {
		cb = cb || function () {};
		var self = this;
		if (!this.pc.remoteDescription) {
			// the old API is used, call handleOffer
			throw new Error('remoteDescription not set');
		}

		if (this.pc.signalingState === 'closed') return cb('Already closed');

		self.pc.createAnswer(
			function (answer) {
				var sim = [];
				if (self.enableChromeNativeSimulcast) {
					// native simulcast part 1: add another SSRC
					answer.jingle = SJJ.toSessionJSON(answer.sdp, {
						role: self._role(),
						direction: 'outgoing'
					});
					if (answer.jingle.contents.length >= 2 && answer.jingle.contents[1].name === 'video') {
						var groups = answer.jingle.contents[1].application.sourceGroups || [];
						var hasSim = false;
						groups.forEach(function (group) {
							if (group.semantics == 'SIM') hasSim = true;
						});
						if (!hasSim &&
							answer.jingle.contents[1].application.sources.length) {
							var newssrc = JSON.parse(JSON.stringify(answer.jingle.contents[1].application.sources[0]));
							newssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
							answer.jingle.contents[1].application.sources.push(newssrc);

							sim.push(answer.jingle.contents[1].application.sources[0].ssrc);
							sim.push(newssrc.ssrc);
							groups.push({
								semantics: 'SIM',
								sources: sim
							});

							// also create an RTX one for the SIM one
							var rtxssrc = JSON.parse(JSON.stringify(newssrc));
							rtxssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
							answer.jingle.contents[1].application.sources.push(rtxssrc);
							groups.push({
								semantics: 'FID',
								sources: [newssrc.ssrc, rtxssrc.ssrc]
							});

							answer.jingle.contents[1].application.sourceGroups = groups;
							answer.sdp = SJJ.toSessionSDP(answer.jingle, {
								sid: self.config.sdpSessionID,
								role: self._role(),
								direction: 'outgoing'
							});
						}
					}
				}
				var expandedAnswer = {
					type: 'answer',
					sdp: answer.sdp
				};
				if (self.assumeSetLocalSuccess) {
					// not safe to do when doing simulcast mangling
					var copy = cloneDeep(expandedAnswer);
					self.emit('answer', copy);
					cb(null, copy);
				}
				self._candidateBuffer = [];
				self.pc.setLocalDescription(answer,
					function () {
						if (self.config.useJingle) {
							var jingle = SJJ.toSessionJSON(answer.sdp, {
								role: self._role(),
								direction: 'outgoing'
							});
							jingle.sid = self.config.sid;
							self.localDescription = jingle;
							expandedAnswer.jingle = jingle;
						}
						if (self.enableChromeNativeSimulcast) {
							// native simulcast part 2:
							// signal multiple tracks to the receiver
							// for anything in the SIM group
							if (!expandedAnswer.jingle) {
								expandedAnswer.jingle = SJJ.toSessionJSON(answer.sdp, {
									role: self._role(),
									direction: 'outgoing'
								});
							}
							expandedAnswer.jingle.contents[1].application.sources.forEach(function (source, idx) {
								// the floor idx/2 is a hack that relies on a particular order
								// of groups, alternating between sim and rtx
								source.parameters = source.parameters.map(function (parameter) {
									if (parameter.key === 'msid') {
										parameter.value += '-' + Math.floor(idx / 2);
									}
									return parameter;
								});
							});
							expandedAnswer.sdp = SJJ.toSessionSDP(expandedAnswer.jingle, {
								sid: self.sdpSessionID,
								role: self._role(),
								direction: 'outgoing'
							});
						}
						expandedAnswer.sdp.split('\r\n').forEach(function (line) {
							if (line.indexOf('a=candidate:') === 0) {
								self._checkLocalCandidate(line);
							}
						});
						if (!self.assumeSetLocalSuccess) {
							var copy = cloneDeep(expandedAnswer);
							self.emit('answer', copy);
							cb(null, copy);
						}
					},
					function (err) {
						self.emit('error', err);
						cb(err);
					}
				);
			},
			function (err) {
				self.emit('error', err);
				cb(err);
			},
			constraints
		);
	};

// Internal method for emitting ice candidates on our peer object
	PeerConnection.prototype._onIce = function (event) {
		var self = this;
		if (event.candidate) {
			if (this.dontSignalCandidates) return;
			var ice = event.candidate;

			var expandedCandidate = {
				candidate: {
					candidate: ice.candidate,
					sdpMid: ice.sdpMid,
					sdpMLineIndex: ice.sdpMLineIndex
				}
			};
			this._checkLocalCandidate(ice.candidate);

			var cand = SJJ.toCandidateJSON(ice.candidate);

			var already;
			var idx;
			if (this.eliminateDuplicateCandidates && cand.type === 'relay') {
				// drop candidates with same foundation, component
				// take local type pref into account so we don't ignore udp
				// ones when we know about a TCP one. unlikely but...
				already = this._candidateBuffer.filter(
					function (c) {
						return c.type === 'relay';
					}).map(function (c) {
						return c.foundation + ':' + c.component;
					}
				);
				idx = already.indexOf(cand.foundation + ':' + cand.component);
				// remember: local type pref of udp is 0, tcp 1, tls 2
				if (idx > -1 && ((cand.priority >> 24) >= (already[idx].priority >> 24))) {
					// drop it, same foundation with higher (worse) type pref
					return;
				}
			}
			if (this.config.bundlePolicy === 'max-bundle') {
				// drop candidates which are duplicate for audio/video/data
				// duplicate means same host/port but different sdpMid
				already = this._candidateBuffer.filter(
					function (c) {
						return cand.type === c.type;
					}).map(function (cand) {
						return cand.address + ':' + cand.port;
					}
				);
				idx = already.indexOf(cand.address + ':' + cand.port);
				if (idx > -1) return;
			}
			// also drop rtcp candidates since we know the peer supports RTCP-MUX
			// this is a workaround until browsers implement this natively
			if (this.config.rtcpMuxPolicy === 'require' && cand.component === '2') {
				return;
			}
			this._candidateBuffer.push(cand);

			if (self.config.useJingle) {
				if (!ice.sdpMid) { // firefox doesn't set this
					if (self.pc.remoteDescription && self.pc.remoteDescription.type === 'offer') {
						// preserve name from remote
						ice.sdpMid = self.remoteDescription.contents[ice.sdpMLineIndex].name;
					} else {
						ice.sdpMid = self.localDescription.contents[ice.sdpMLineIndex].name;
					}
				}
				if (!self.iceCredentials.local[ice.sdpMid]) {
					var jingle = SJJ.toSessionJSON(self.pc.localDescription.sdp, {
						role: self._role(),
						direction: 'outgoing'
					});
					jingle.contents.forEach(function (content) {
						var transport = content.transport || {};
						if (transport.ufrag) {
							self.iceCredentials.local[content.name] = {
								ufrag: transport.ufrag,
								pwd: transport.pwd
							};
						}
					});
				}
				expandedCandidate.jingle = {
					contents: [{
						name: ice.sdpMid,
						creator: self._role(),
						transport: {
							transportType: 'iceUdp',
							ufrag: self.iceCredentials.local[ice.sdpMid].ufrag,
							pwd: self.iceCredentials.local[ice.sdpMid].pwd,
							candidates: [
								cand
							]
						}
					}]
				};
				if (self.batchIceCandidates > 0) {
					if (self.batchedIceCandidates.length === 0) {
						window.setTimeout(function () {
							var contents = {};
							self.batchedIceCandidates.forEach(function (content) {
								content = content.contents[0];
								if (!contents[content.name]) contents[content.name] = content;
								contents[content.name].transport.candidates.push(content.transport.candidates[0]);
							});
							var newCand = {
								jingle: {
									contents: []
								}
							};
							Object.keys(contents).forEach(function (name) {
								newCand.jingle.contents.push(contents[name]);
							});
							self.batchedIceCandidates = [];
							self.emit('ice', newCand);
						}, self.batchIceCandidates);
					}
					self.batchedIceCandidates.push(expandedCandidate.jingle);
					return;
				}

			}
			this.emit('ice', expandedCandidate);
		} else {
			this.emit('endOfCandidates');
		}
	};

// Internal method for processing a new data channel being added by the
// other peer.
	PeerConnection.prototype._onDataChannel = function (event) {
		// make sure we keep a reference so this doesn't get garbage collected
		var channel = event.channel;
		this._remoteDataChannels.push(channel);

		this.emit('addChannel', channel);
	};

// Create a data channel spec reference:
// http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannelInit
	PeerConnection.prototype.createDataChannel = function (name, opts) {
		var channel = this.pc.createDataChannel(name, opts);

		// make sure we keep a reference so this doesn't get garbage collected
		this._localDataChannels.push(channel);

		return channel;
	};

	PeerConnection.prototype.getStats = function (cb) {
		this.pc.getStats(null,
			function (res) {
				cb(null, res);
			},
			function (err) {
				cb(err);
			}
		);
	};

	module.exports = PeerConnection;

},{"lodash.clonedeep":47,"sdp-jingle-json":57,"traceablepeerconnection":76,"util":89,"webrtc-adapter":90,"wildemitter":100}],57:[function(require,module,exports){
	var toSDP = require('./lib/tosdp');
	var toJSON = require('./lib/tojson');


// Converstion from JSON to SDP

	exports.toIncomingSDPOffer = function (session) {
		return toSDP.toSessionSDP(session, {
			role: 'responder',
			direction: 'incoming'
		});
	};
	exports.toOutgoingSDPOffer = function (session) {
		return toSDP.toSessionSDP(session, {
			role: 'initiator',
			direction: 'outgoing'
		});
	};
	exports.toIncomingSDPAnswer = function (session) {
		return toSDP.toSessionSDP(session, {
			role: 'initiator',
			direction: 'incoming'
		});
	};
	exports.toOutgoingSDPAnswer = function (session) {
		return toSDP.toSessionSDP(session, {
			role: 'responder',
			direction: 'outgoing'
		});
	};
	exports.toIncomingMediaSDPOffer = function (media) {
		return toSDP.toMediaSDP(media, {
			role: 'responder',
			direction: 'incoming'
		});
	};
	exports.toOutgoingMediaSDPOffer = function (media) {
		return toSDP.toMediaSDP(media, {
			role: 'initiator',
			direction: 'outgoing'
		});
	};
	exports.toIncomingMediaSDPAnswer = function (media) {
		return toSDP.toMediaSDP(media, {
			role: 'initiator',
			direction: 'incoming'
		});
	};
	exports.toOutgoingMediaSDPAnswer = function (media) {
		return toSDP.toMediaSDP(media, {
			role: 'responder',
			direction: 'outgoing'
		});
	};
	exports.toCandidateSDP = toSDP.toCandidateSDP;
	exports.toMediaSDP = toSDP.toMediaSDP;
	exports.toSessionSDP = toSDP.toSessionSDP;


// Conversion from SDP to JSON

	exports.toIncomingJSONOffer = function (sdp, creators) {
		return toJSON.toSessionJSON(sdp, {
			role: 'responder',
			direction: 'incoming',
			creators: creators
		});
	};
	exports.toOutgoingJSONOffer = function (sdp, creators) {
		return toJSON.toSessionJSON(sdp, {
			role: 'initiator',
			direction: 'outgoing',
			creators: creators
		});
	};
	exports.toIncomingJSONAnswer = function (sdp, creators) {
		return toJSON.toSessionJSON(sdp, {
			role: 'initiator',
			direction: 'incoming',
			creators: creators
		});
	};
	exports.toOutgoingJSONAnswer = function (sdp, creators) {
		return toJSON.toSessionJSON(sdp, {
			role: 'responder',
			direction: 'outgoing',
			creators: creators
		});
	};
	exports.toIncomingMediaJSONOffer = function (sdp, creator) {
		return toJSON.toMediaJSON(sdp, {
			role: 'responder',
			direction: 'incoming',
			creator: creator
		});
	};
	exports.toOutgoingMediaJSONOffer = function (sdp, creator) {
		return toJSON.toMediaJSON(sdp, {
			role: 'initiator',
			direction: 'outgoing',
			creator: creator
		});
	};
	exports.toIncomingMediaJSONAnswer = function (sdp, creator) {
		return toJSON.toMediaJSON(sdp, {
			role: 'initiator',
			direction: 'incoming',
			creator: creator
		});
	};
	exports.toOutgoingMediaJSONAnswer = function (sdp, creator) {
		return toJSON.toMediaJSON(sdp, {
			role: 'responder',
			direction: 'outgoing',
			creator: creator
		});
	};
	exports.toCandidateJSON = toJSON.toCandidateJSON;
	exports.toMediaJSON = toJSON.toMediaJSON;
	exports.toSessionJSON = toJSON.toSessionJSON;

},{"./lib/tojson":60,"./lib/tosdp":61}],58:[function(require,module,exports){
	exports.lines = function (sdp) {
		return sdp.split('\r\n').filter(function (line) {
			return line.length > 0;
		});
	};

	exports.findLine = function (prefix, mediaLines, sessionLines) {
		var prefixLength = prefix.length;
		for (var i = 0; i < mediaLines.length; i++) {
			if (mediaLines[i].substr(0, prefixLength) === prefix) {
				return mediaLines[i];
			}
		}
		// Continue searching in parent session section
		if (!sessionLines) {
			return false;
		}

		for (var j = 0; j < sessionLines.length; j++) {
			if (sessionLines[j].substr(0, prefixLength) === prefix) {
				return sessionLines[j];
			}
		}

		return false;
	};

	exports.findLines = function (prefix, mediaLines, sessionLines) {
		var results = [];
		var prefixLength = prefix.length;
		for (var i = 0; i < mediaLines.length; i++) {
			if (mediaLines[i].substr(0, prefixLength) === prefix) {
				results.push(mediaLines[i]);
			}
		}
		if (results.length || !sessionLines) {
			return results;
		}
		for (var j = 0; j < sessionLines.length; j++) {
			if (sessionLines[j].substr(0, prefixLength) === prefix) {
				results.push(sessionLines[j]);
			}
		}
		return results;
	};

	exports.mline = function (line) {
		var parts = line.substr(2).split(' ');
		var parsed = {
			media: parts[0],
			port: parts[1],
			proto: parts[2],
			formats: []
		};
		for (var i = 3; i < parts.length; i++) {
			if (parts[i]) {
				parsed.formats.push(parts[i]);
			}
		}
		return parsed;
	};

	exports.rtpmap = function (line) {
		var parts = line.substr(9).split(' ');
		var parsed = {
			id: parts.shift()
		};

		parts = parts[0].split('/');

		parsed.name = parts[0];
		parsed.clockrate = parts[1];
		parsed.channels = parts.length == 3 ? parts[2] : '1';
		return parsed;
	};

	exports.sctpmap = function (line) {
		// based on -05 draft
		var parts = line.substr(10).split(' ');
		var parsed = {
			number: parts.shift(),
			protocol: parts.shift(),
			streams: parts.shift()
		};
		return parsed;
	};


	exports.fmtp = function (line) {
		var kv, key, value;
		var parts = line.substr(line.indexOf(' ') + 1).split(';');
		var parsed = [];
		for (var i = 0; i < parts.length; i++) {
			kv = parts[i].split('=');
			key = kv[0].trim();
			value = kv[1];
			if (key && value) {
				parsed.push({key: key, value: value});
			} else if (key) {
				parsed.push({key: '', value: key});
			}
		}
		return parsed;
	};

	exports.crypto = function (line) {
		var parts = line.substr(9).split(' ');
		var parsed = {
			tag: parts[0],
			cipherSuite: parts[1],
			keyParams: parts[2],
			sessionParams: parts.slice(3).join(' ')
		};
		return parsed;
	};

	exports.fingerprint = function (line) {
		var parts = line.substr(14).split(' ');
		return {
			hash: parts[0],
			value: parts[1]
		};
	};

	exports.extmap = function (line) {
		var parts = line.substr(9).split(' ');
		var parsed = {};

		var idpart = parts.shift();
		var sp = idpart.indexOf('/');
		if (sp >= 0) {
			parsed.id = idpart.substr(0, sp);
			parsed.senders = idpart.substr(sp + 1);
		} else {
			parsed.id = idpart;
			parsed.senders = 'sendrecv';
		}

		parsed.uri = parts.shift() || '';

		return parsed;
	};

	exports.rtcpfb = function (line) {
		var parts = line.substr(10).split(' ');
		var parsed = {};
		parsed.id = parts.shift();
		parsed.type = parts.shift();
		if (parsed.type === 'trr-int') {
			parsed.value = parts.shift();
		} else {
			parsed.subtype = parts.shift() || '';
		}
		parsed.parameters = parts;
		return parsed;
	};

	exports.candidate = function (line) {
		var parts;
		if (line.indexOf('a=candidate:') === 0) {
			parts = line.substring(12).split(' ');
		} else { // no a=candidate
			parts = line.substring(10).split(' ');
		}

		var candidate = {
			foundation: parts[0],
			component: parts[1],
			protocol: parts[2].toLowerCase(),
			priority: parts[3],
			ip: parts[4],
			port: parts[5],
			// skip parts[6] == 'typ'
			type: parts[7],
			generation: '0'
		};

		for (var i = 8; i < parts.length; i += 2) {
			if (parts[i] === 'raddr') {
				candidate.relAddr = parts[i + 1];
			} else if (parts[i] === 'rport') {
				candidate.relPort = parts[i + 1];
			} else if (parts[i] === 'generation') {
				candidate.generation = parts[i + 1];
			} else if (parts[i] === 'tcptype') {
				candidate.tcpType = parts[i + 1];
			}
		}

		candidate.network = '1';

		return candidate;
	};

	exports.sourceGroups = function (lines) {
		var parsed = [];
		for (var i = 0; i < lines.length; i++) {
			var parts = lines[i].substr(13).split(' ');
			parsed.push({
				semantics: parts.shift(),
				sources: parts
			});
		}
		return parsed;
	};

	exports.sources = function (lines) {
		// http://tools.ietf.org/html/rfc5576
		var parsed = [];
		var sources = {};
		for (var i = 0; i < lines.length; i++) {
			var parts = lines[i].substr(7).split(' ');
			var ssrc = parts.shift();

			if (!sources[ssrc]) {
				var source = {
					ssrc: ssrc,
					parameters: []
				};
				parsed.push(source);

				// Keep an index
				sources[ssrc] = source;
			}

			parts = parts.join(' ').split(':');
			var attribute = parts.shift();
			var value = parts.join(':') || null;

			sources[ssrc].parameters.push({
				key: attribute,
				value: value
			});
		}

		return parsed;
	};

	exports.groups = function (lines) {
		// http://tools.ietf.org/html/rfc5888
		var parsed = [];
		var parts;
		for (var i = 0; i < lines.length; i++) {
			parts = lines[i].substr(8).split(' ');
			parsed.push({
				semantics: parts.shift(),
				contents: parts
			});
		}
		return parsed;
	};

	exports.bandwidth = function (line) {
		var parts = line.substr(2).split(':');
		var parsed = {};
		parsed.type = parts.shift();
		parsed.bandwidth = parts.shift();
		return parsed;
	};

	exports.msid = function (line) {
		var data = line.substr(7);
		var parts = data.split(' ');
		return {
			msid: data,
			mslabel: parts[0],
			label: parts[1]
		};
	};

},{}],59:[function(require,module,exports){
	module.exports = {
		initiator: {
			incoming: {
				initiator: 'recvonly',
				responder: 'sendonly',
				both: 'sendrecv',
				none: 'inactive',
				recvonly: 'initiator',
				sendonly: 'responder',
				sendrecv: 'both',
				inactive: 'none'
			},
			outgoing: {
				initiator: 'sendonly',
				responder: 'recvonly',
				both: 'sendrecv',
				none: 'inactive',
				recvonly: 'responder',
				sendonly: 'initiator',
				sendrecv: 'both',
				inactive: 'none'
			}
		},
		responder: {
			incoming: {
				initiator: 'sendonly',
				responder: 'recvonly',
				both: 'sendrecv',
				none: 'inactive',
				recvonly: 'responder',
				sendonly: 'initiator',
				sendrecv: 'both',
				inactive: 'none'
			},
			outgoing: {
				initiator: 'recvonly',
				responder: 'sendonly',
				both: 'sendrecv',
				none: 'inactive',
				recvonly: 'initiator',
				sendonly: 'responder',
				sendrecv: 'both',
				inactive: 'none'
			}
		}
	};

},{}],60:[function(require,module,exports){
	var SENDERS = require('./senders');
	var parsers = require('./parsers');
	var idCounter = Math.random();


	exports._setIdCounter = function (counter) {
		idCounter = counter;
	};

	exports.toSessionJSON = function (sdp, opts) {
		var i;
		var creators = opts.creators || [];
		var role = opts.role || 'initiator';
		var direction = opts.direction || 'outgoing';


		// Divide the SDP into session and media sections.
		var media = sdp.split('\r\nm=');
		for (i = 1; i < media.length; i++) {
			media[i] = 'm=' + media[i];
			if (i !== media.length - 1) {
				media[i] += '\r\n';
			}
		}
		var session = media.shift() + '\r\n';
		var sessionLines = parsers.lines(session);
		var parsed = {};

		var contents = [];
		for (i = 0; i < media.length; i++) {
			contents.push(exports.toMediaJSON(media[i], session, {
				role: role,
				direction: direction,
				creator: creators[i] || 'initiator'
			}));
		}
		parsed.contents = contents;

		var groupLines = parsers.findLines('a=group:', sessionLines);
		if (groupLines.length) {
			parsed.groups = parsers.groups(groupLines);
		}

		return parsed;
	};

	exports.toMediaJSON = function (media, session, opts) {
		var creator = opts.creator || 'initiator';
		var role = opts.role || 'initiator';
		var direction = opts.direction || 'outgoing';

		var lines = parsers.lines(media);
		var sessionLines = parsers.lines(session);
		var mline = parsers.mline(lines[0]);

		var content = {
			creator: creator,
			name: mline.media,
			application: {
				applicationType: 'rtp',
				media: mline.media,
				payloads: [],
				encryption: [],
				feedback: [],
				headerExtensions: []
			},
			transport: {
				transportType: 'iceUdp',
				candidates: [],
				fingerprints: []
			}
		};
		if (mline.media == 'application') {
			// FIXME: the description is most likely to be independent
			// of the SDP and should be processed by other parts of the library
			content.application = {
				applicationType: 'datachannel'
			};
			content.transport.sctp = [];
		}
		var desc = content.application;
		var trans = content.transport;

		// If we have a mid, use that for the content name instead.
		var mid = parsers.findLine('a=mid:', lines);
		if (mid) {
			content.name = mid.substr(6);
		}

		if (parsers.findLine('a=sendrecv', lines, sessionLines)) {
			content.senders = 'both';
		} else if (parsers.findLine('a=sendonly', lines, sessionLines)) {
			content.senders = SENDERS[role][direction].sendonly;
		} else if (parsers.findLine('a=recvonly', lines, sessionLines)) {
			content.senders = SENDERS[role][direction].recvonly;
		} else if (parsers.findLine('a=inactive', lines, sessionLines)) {
			content.senders = 'none';
		}

		if (desc.applicationType == 'rtp') {
			var bandwidth = parsers.findLine('b=', lines);
			if (bandwidth) {
				desc.bandwidth = parsers.bandwidth(bandwidth);
			}

			var ssrc = parsers.findLine('a=ssrc:', lines);
			if (ssrc) {
				desc.ssrc = ssrc.substr(7).split(' ')[0];
			}

			var rtpmapLines = parsers.findLines('a=rtpmap:', lines);
			rtpmapLines.forEach(function (line) {
				var payload = parsers.rtpmap(line);
				payload.parameters = [];
				payload.feedback = [];

				var fmtpLines = parsers.findLines('a=fmtp:' + payload.id, lines);
				// There should only be one fmtp line per payload
				fmtpLines.forEach(function (line) {
					payload.parameters = parsers.fmtp(line);
				});

				var fbLines = parsers.findLines('a=rtcp-fb:' + payload.id, lines);
				fbLines.forEach(function (line) {
					payload.feedback.push(parsers.rtcpfb(line));
				});

				desc.payloads.push(payload);
			});

			var cryptoLines = parsers.findLines('a=crypto:', lines, sessionLines);
			cryptoLines.forEach(function (line) {
				desc.encryption.push(parsers.crypto(line));
			});

			if (parsers.findLine('a=rtcp-mux', lines)) {
				desc.mux = true;
			}

			var fbLines = parsers.findLines('a=rtcp-fb:*', lines);
			fbLines.forEach(function (line) {
				desc.feedback.push(parsers.rtcpfb(line));
			});

			var extLines = parsers.findLines('a=extmap:', lines);
			extLines.forEach(function (line) {
				var ext = parsers.extmap(line);

				ext.senders = SENDERS[role][direction][ext.senders];

				desc.headerExtensions.push(ext);
			});

			var ssrcGroupLines = parsers.findLines('a=ssrc-group:', lines);
			desc.sourceGroups = parsers.sourceGroups(ssrcGroupLines || []);

			var ssrcLines = parsers.findLines('a=ssrc:', lines);
			var sources = desc.sources = parsers.sources(ssrcLines || []);

			var msidLine = parsers.findLine('a=msid:', lines);
			if (msidLine) {
				var msid = parsers.msid(msidLine);
				['msid', 'mslabel', 'label'].forEach(function (key) {
					for (var i = 0; i < sources.length; i++) {
						var found = false;
						for (var j = 0; j < sources[i].parameters.length; j++) {
							if (sources[i].parameters[j].key === key) {
								found = true;
							}
						}
						if (!found) {
							sources[i].parameters.push({ key: key, value: msid[key] });
						}
					}
				});
			}

			if (parsers.findLine('a=x-google-flag:conference', lines, sessionLines)) {
				desc.googConferenceFlag = true;
			}
		}

		// transport specific attributes
		var fingerprintLines = parsers.findLines('a=fingerprint:', lines, sessionLines);
		var setup = parsers.findLine('a=setup:', lines, sessionLines);
		fingerprintLines.forEach(function (line) {
			var fp = parsers.fingerprint(line);
			if (setup) {
				fp.setup = setup.substr(8);
			}
			trans.fingerprints.push(fp);
		});

		var ufragLine = parsers.findLine('a=ice-ufrag:', lines, sessionLines);
		var pwdLine = parsers.findLine('a=ice-pwd:', lines, sessionLines);
		if (ufragLine && pwdLine) {
			trans.ufrag = ufragLine.substr(12);
			trans.pwd = pwdLine.substr(10);
			trans.candidates = [];

			var candidateLines = parsers.findLines('a=candidate:', lines, sessionLines);
			candidateLines.forEach(function (line) {
				trans.candidates.push(exports.toCandidateJSON(line));
			});
		}

		if (desc.applicationType == 'datachannel') {
			var sctpmapLines = parsers.findLines('a=sctpmap:', lines);
			sctpmapLines.forEach(function (line) {
				var sctp = parsers.sctpmap(line);
				trans.sctp.push(sctp);
			});
		}

		return content;
	};

	exports.toCandidateJSON = function (line) {
		var candidate = parsers.candidate(line.split('\r\n')[0]);
		candidate.id = (idCounter++).toString(36).substr(0, 12);
		return candidate;
	};

},{"./parsers":58,"./senders":59}],61:[function(require,module,exports){
	var SENDERS = require('./senders');


	exports.toSessionSDP = function (session, opts) {
		var role = opts.role || 'initiator';
		var direction = opts.direction || 'outgoing';
		var sid = opts.sid || session.sid || Date.now();
		var time = opts.time || Date.now();

		var sdp = [
			'v=0',
			'o=- ' + sid + ' ' + time + ' IN IP4 0.0.0.0',
			's=-',
			't=0 0'
		];

		var contents = session.contents || [];
		var hasSources = false;
		contents.forEach(function (content) {
			if (content.application.sources &&
				content.application.sources.length) {
				hasSources = true;
			}
		});

		if (hasSources) {
			sdp.push('a=msid-semantic: WMS *');
		}

		var groups = session.groups || [];
		groups.forEach(function (group) {
			sdp.push('a=group:' + group.semantics + ' ' + group.contents.join(' '));
		});


		contents.forEach(function (content) {
			sdp.push(exports.toMediaSDP(content, opts));
		});

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

	exports.toMediaSDP = function (content, opts) {
		var sdp = [];

		var role = opts.role || 'initiator';
		var direction = opts.direction || 'outgoing';

		var desc = content.application;
		var transport = content.transport;
		var payloads = desc.payloads || [];
		var fingerprints = (transport && transport.fingerprints) || [];

		var mline = [];
		if (desc.applicationType == 'datachannel') {
			mline.push('application');
			mline.push('1');
			mline.push('DTLS/SCTP');
			if (transport.sctp) {
				transport.sctp.forEach(function (map) {
					mline.push(map.number);
				});
			}
		} else {
			mline.push(desc.media);
			mline.push('1');
			if (fingerprints.length > 0) {
				mline.push('UDP/TLS/RTP/SAVPF');
			} else if (desc.encryption && desc.encryption.length > 0) {
				mline.push('RTP/SAVPF');
			} else {
				mline.push('RTP/AVPF');
			}
			payloads.forEach(function (payload) {
				mline.push(payload.id);
			});
		}


		sdp.push('m=' + mline.join(' '));

		sdp.push('c=IN IP4 0.0.0.0');
		if (desc.bandwidth && desc.bandwidth.type && desc.bandwidth.bandwidth) {
			sdp.push('b=' + desc.bandwidth.type + ':' + desc.bandwidth.bandwidth);
		}
		if (desc.applicationType == 'rtp') {
			sdp.push('a=rtcp:1 IN IP4 0.0.0.0');
		}

		if (transport) {
			if (transport.ufrag) {
				sdp.push('a=ice-ufrag:' + transport.ufrag);
			}
			if (transport.pwd) {
				sdp.push('a=ice-pwd:' + transport.pwd);
			}

			var pushedSetup = false;
			fingerprints.forEach(function (fingerprint) {
				sdp.push('a=fingerprint:' + fingerprint.hash + ' ' + fingerprint.value);
				if (fingerprint.setup && !pushedSetup) {
					sdp.push('a=setup:' + fingerprint.setup);
				}
			});

			if (transport.sctp) {
				transport.sctp.forEach(function (map) {
					sdp.push('a=sctpmap:' + map.number + ' ' + map.protocol + ' ' + map.streams);
				});
			}
		}

		if (desc.applicationType == 'rtp') {
			sdp.push('a=' + (SENDERS[role][direction][content.senders] || 'sendrecv'));
		}
		sdp.push('a=mid:' + content.name);

		if (desc.sources && desc.sources.length) {
			(desc.sources[0].parameters || []).forEach(function (param) {
				if (param.key === 'msid') {
					sdp.push('a=msid:' + param.value);
				}
			});
		}

		if (desc.mux) {
			sdp.push('a=rtcp-mux');
		}

		var encryption = desc.encryption || [];
		encryption.forEach(function (crypto) {
			sdp.push('a=crypto:' + crypto.tag + ' ' + crypto.cipherSuite + ' ' + crypto.keyParams + (crypto.sessionParams ? ' ' + crypto.sessionParams : ''));
		});
		if (desc.googConferenceFlag) {
			sdp.push('a=x-google-flag:conference');
		}

		payloads.forEach(function (payload) {
			var rtpmap = 'a=rtpmap:' + payload.id + ' ' + payload.name + '/' + payload.clockrate;
			if (payload.channels && payload.channels != '1') {
				rtpmap += '/' + payload.channels;
			}
			sdp.push(rtpmap);

			if (payload.parameters && payload.parameters.length) {
				var fmtp = ['a=fmtp:' + payload.id];
				var parameters = [];
				payload.parameters.forEach(function (param) {
					parameters.push((param.key ? param.key + '=' : '') + param.value);
				});
				fmtp.push(parameters.join(';'));
				sdp.push(fmtp.join(' '));
			}

			if (payload.feedback) {
				payload.feedback.forEach(function (fb) {
					if (fb.type === 'trr-int') {
						sdp.push('a=rtcp-fb:' + payload.id + ' trr-int ' + (fb.value ? fb.value : '0'));
					} else {
						sdp.push('a=rtcp-fb:' + payload.id + ' ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
					}
				});
			}
		});

		if (desc.feedback) {
			desc.feedback.forEach(function (fb) {
				if (fb.type === 'trr-int') {
					sdp.push('a=rtcp-fb:* trr-int ' + (fb.value ? fb.value : '0'));
				} else {
					sdp.push('a=rtcp-fb:* ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
				}
			});
		}

		var hdrExts = desc.headerExtensions || [];
		hdrExts.forEach(function (hdr) {
			sdp.push('a=extmap:' + hdr.id + (hdr.senders ? '/' + SENDERS[role][direction][hdr.senders] : '') + ' ' + hdr.uri);
		});

		var ssrcGroups = desc.sourceGroups || [];
		ssrcGroups.forEach(function (ssrcGroup) {
			sdp.push('a=ssrc-group:' + ssrcGroup.semantics + ' ' + ssrcGroup.sources.join(' '));
		});

		var ssrcs = desc.sources || [];
		ssrcs.forEach(function (ssrc) {
			for (var i = 0; i < ssrc.parameters.length; i++) {
				var param = ssrc.parameters[i];
				sdp.push('a=ssrc:' + (ssrc.ssrc || desc.ssrc) + ' ' + param.key + (param.value ? (':' + param.value) : ''));
			}
		});

		var candidates = transport.candidates || [];
		candidates.forEach(function (candidate) {
			sdp.push(exports.toCandidateSDP(candidate));
		});

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

	exports.toCandidateSDP = function (candidate) {
		var sdp = [];

		sdp.push(candidate.foundation);
		sdp.push(candidate.component);
		sdp.push(candidate.protocol.toUpperCase());
		sdp.push(candidate.priority);
		sdp.push(candidate.ip);
		sdp.push(candidate.port);

		var type = candidate.type;
		sdp.push('typ');
		sdp.push(type);
		if (type === 'srflx' || type === 'prflx' || type === 'relay') {
			if (candidate.relAddr && candidate.relPort) {
				sdp.push('raddr');
				sdp.push(candidate.relAddr);
				sdp.push('rport');
				sdp.push(candidate.relPort);
			}
		}
		if (candidate.tcpType && candidate.protocol.toUpperCase() == 'TCP') {
			sdp.push('tcptype');
			sdp.push(candidate.tcpType);
		}

		sdp.push('generation');
		sdp.push(candidate.generation || '0');

		// FIXME: apparently this is wrong per spec
		// but then, we need this when actually putting this into
		// SDP so it's going to stay.
		// decision needs to be revisited when browsers dont
		// accept this any longer
		return 'a=candidate:' + sdp.join(' ');
	};

},{"./senders":59}],62:[function(require,module,exports){
	/* eslint-env node */
	'use strict';

// SDP helpers.
	var SDPUtils = {};

// Generate an alphanumeric identifier for cname or mids.
// TODO: use UUIDs instead? https://gist.github.com/jed/982883
	SDPUtils.generateIdentifier = function() {
		return Math.random().toString(36).substr(2, 10);
	};

// The RTCP CNAME used by all peerconnections from the same JS.
	SDPUtils.localCName = SDPUtils.generateIdentifier();

// Splits SDP into lines, dealing with both CRLF and LF.
	SDPUtils.splitLines = function(blob) {
		return blob.trim().split('\n').map(function(line) {
			return line.trim();
		});
	};
// Splits SDP into sessionpart and mediasections. Ensures CRLF.
	SDPUtils.splitSections = function(blob) {
		var parts = blob.split('\nm=');
		return parts.map(function(part, index) {
			return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
		});
	};

// Returns lines that start with a certain prefix.
	SDPUtils.matchPrefix = function(blob, prefix) {
		return SDPUtils.splitLines(blob).filter(function(line) {
			return line.indexOf(prefix) === 0;
		});
	};

// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
	SDPUtils.parseCandidate = function(line) {
		var parts;
		// Parse both variants.
		if (line.indexOf('a=candidate:') === 0) {
			parts = line.substring(12).split(' ');
		} else {
			parts = line.substring(10).split(' ');
		}

		var candidate = {
			foundation: parts[0],
			component: parts[1],
			protocol: parts[2].toLowerCase(),
			priority: parseInt(parts[3], 10),
			ip: parts[4],
			port: parseInt(parts[5], 10),
			// skip parts[6] == 'typ'
			type: parts[7]
		};

		for (var i = 8; i < parts.length; i += 2) {
			switch (parts[i]) {
				case 'raddr':
					candidate.relatedAddress = parts[i + 1];
					break;
				case 'rport':
					candidate.relatedPort = parseInt(parts[i + 1], 10);
					break;
				case 'tcptype':
					candidate.tcpType = parts[i + 1];
					break;
				default: // Unknown extensions are silently ignored.
					break;
			}
		}
		return candidate;
	};

// Translates a candidate object into SDP candidate attribute.
	SDPUtils.writeCandidate = function(candidate) {
		var sdp = [];
		sdp.push(candidate.foundation);
		sdp.push(candidate.component);
		sdp.push(candidate.protocol.toUpperCase());
		sdp.push(candidate.priority);
		sdp.push(candidate.ip);
		sdp.push(candidate.port);

		var type = candidate.type;
		sdp.push('typ');
		sdp.push(type);
		if (type !== 'host' && candidate.relatedAddress &&
			candidate.relatedPort) {
			sdp.push('raddr');
			sdp.push(candidate.relatedAddress); // was: relAddr
			sdp.push('rport');
			sdp.push(candidate.relatedPort); // was: relPort
		}
		if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
			sdp.push('tcptype');
			sdp.push(candidate.tcpType);
		}
		return 'candidate:' + sdp.join(' ');
	};

// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
// a=rtpmap:111 opus/48000/2
	SDPUtils.parseRtpMap = function(line) {
		var parts = line.substr(9).split(' ');
		var parsed = {
			payloadType: parseInt(parts.shift(), 10) // was: id
		};

		parts = parts[0].split('/');

		parsed.name = parts[0];
		parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
		// was: channels
		parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
		return parsed;
	};

// Generate an a=rtpmap line from RTCRtpCodecCapability or
// RTCRtpCodecParameters.
	SDPUtils.writeRtpMap = function(codec) {
		var pt = codec.payloadType;
		if (codec.preferredPayloadType !== undefined) {
			pt = codec.preferredPayloadType;
		}
		return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
			(codec.numChannels !== 1 ? '/' + codec.numChannels : '') + '\r\n';
	};

// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
	SDPUtils.parseExtmap = function(line) {
		var parts = line.substr(9).split(' ');
		return {
			id: parseInt(parts[0], 10),
			uri: parts[1]
		};
	};

// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
// RTCRtpHeaderExtension.
	SDPUtils.writeExtmap = function(headerExtension) {
		return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
			' ' + headerExtension.uri + '\r\n';
	};

// Parses an ftmp line, returns dictionary. Sample input:
// a=fmtp:96 vbr=on;cng=on
// Also deals with vbr=on; cng=on
	SDPUtils.parseFmtp = function(line) {
		var parsed = {};
		var kv;
		var parts = line.substr(line.indexOf(' ') + 1).split(';');
		for (var j = 0; j < parts.length; j++) {
			kv = parts[j].trim().split('=');
			parsed[kv[0].trim()] = kv[1];
		}
		return parsed;
	};

// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
	SDPUtils.writeFmtp = function(codec) {
		var line = '';
		var pt = codec.payloadType;
		if (codec.preferredPayloadType !== undefined) {
			pt = codec.preferredPayloadType;
		}
		if (codec.parameters && Object.keys(codec.parameters).length) {
			var params = [];
			Object.keys(codec.parameters).forEach(function(param) {
				params.push(param + '=' + codec.parameters[param]);
			});
			line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
		}
		return line;
	};

// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
// a=rtcp-fb:98 nack rpsi
	SDPUtils.parseRtcpFb = function(line) {
		var parts = line.substr(line.indexOf(' ') + 1).split(' ');
		return {
			type: parts.shift(),
			parameter: parts.join(' ')
		};
	};
// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
	SDPUtils.writeRtcpFb = function(codec) {
		var lines = '';
		var pt = codec.payloadType;
		if (codec.preferredPayloadType !== undefined) {
			pt = codec.preferredPayloadType;
		}
		if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
			// FIXME: special handling for trr-int?
			codec.rtcpFeedback.forEach(function(fb) {
				lines += 'a=rtcp-fb:' + pt + ' ' + fb.type +
					(fb.parameter && fb.parameter.length ? ' ' + fb.parameter : '') +
					'\r\n';
			});
		}
		return lines;
	};

// Parses an RFC 5576 ssrc media attribute. Sample input:
// a=ssrc:3735928559 cname:something
	SDPUtils.parseSsrcMedia = function(line) {
		var sp = line.indexOf(' ');
		var parts = {
			ssrc: parseInt(line.substr(7, sp - 7), 10)
		};
		var colon = line.indexOf(':', sp);
		if (colon > -1) {
			parts.attribute = line.substr(sp + 1, colon - sp - 1);
			parts.value = line.substr(colon + 1);
		} else {
			parts.attribute = line.substr(sp + 1);
		}
		return parts;
	};

// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the fingerprint line as input. See also getIceParameters.
	SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
		var lines = SDPUtils.splitLines(mediaSection);
		// Search in session part, too.
		lines = lines.concat(SDPUtils.splitLines(sessionpart));
		var fpLine = lines.filter(function(line) {
			return line.indexOf('a=fingerprint:') === 0;
		})[0].substr(14);
		// Note: a=setup line is ignored since we use the 'auto' role.
		var dtlsParameters = {
			role: 'auto',
			fingerprints: [{
				algorithm: fpLine.split(' ')[0],
				value: fpLine.split(' ')[1]
			}]
		};
		return dtlsParameters;
	};

// Serializes DTLS parameters to SDP.
	SDPUtils.writeDtlsParameters = function(params, setupType) {
		var sdp = 'a=setup:' + setupType + '\r\n';
		params.fingerprints.forEach(function(fp) {
			sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
		});
		return sdp;
	};
// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the ice-ufrag and ice-pwd lines as input.
	SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
		var lines = SDPUtils.splitLines(mediaSection);
		// Search in session part, too.
		lines = lines.concat(SDPUtils.splitLines(sessionpart));
		var iceParameters = {
			usernameFragment: lines.filter(function(line) {
				return line.indexOf('a=ice-ufrag:') === 0;
			})[0].substr(12),
			password: lines.filter(function(line) {
				return line.indexOf('a=ice-pwd:') === 0;
			})[0].substr(10)
		};
		return iceParameters;
	};

// Serializes ICE parameters to SDP.
	SDPUtils.writeIceParameters = function(params) {
		return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
			'a=ice-pwd:' + params.password + '\r\n';
	};

// Parses the SDP media section and returns RTCRtpParameters.
	SDPUtils.parseRtpParameters = function(mediaSection) {
		var description = {
			codecs: [],
			headerExtensions: [],
			fecMechanisms: [],
			rtcp: []
		};
		var lines = SDPUtils.splitLines(mediaSection);
		var mline = lines[0].split(' ');
		for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
			var pt = mline[i];
			var rtpmapline = SDPUtils.matchPrefix(
				mediaSection, 'a=rtpmap:' + pt + ' ')[0];
			if (rtpmapline) {
				var codec = SDPUtils.parseRtpMap(rtpmapline);
				var fmtps = SDPUtils.matchPrefix(
					mediaSection, 'a=fmtp:' + pt + ' ');
				// Only the first a=fmtp:<pt> is considered.
				codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
				codec.rtcpFeedback = SDPUtils.matchPrefix(
					mediaSection, 'a=rtcp-fb:' + pt + ' ')
					.map(SDPUtils.parseRtcpFb);
				description.codecs.push(codec);
				// parse FEC mechanisms from rtpmap lines.
				switch (codec.name.toUpperCase()) {
					case 'RED':
					case 'ULPFEC':
						description.fecMechanisms.push(codec.name.toUpperCase());
						break;
					default: // only RED and ULPFEC are recognized as FEC mechanisms.
						break;
				}
			}
		}
		SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
			description.headerExtensions.push(SDPUtils.parseExtmap(line));
		});
		// FIXME: parse rtcp.
		return description;
	};

// Generates parts of the SDP media section describing the capabilities /
// parameters.
	SDPUtils.writeRtpDescription = function(kind, caps) {
		var sdp = '';

		// Build the mline.
		sdp += 'm=' + kind + ' ';
		sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
		sdp += ' UDP/TLS/RTP/SAVPF ';
		sdp += caps.codecs.map(function(codec) {
				if (codec.preferredPayloadType !== undefined) {
					return codec.preferredPayloadType;
				}
				return codec.payloadType;
			}).join(' ') + '\r\n';

		sdp += 'c=IN IP4 0.0.0.0\r\n';
		sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';

		// Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
		caps.codecs.forEach(function(codec) {
			sdp += SDPUtils.writeRtpMap(codec);
			sdp += SDPUtils.writeFmtp(codec);
			sdp += SDPUtils.writeRtcpFb(codec);
		});
		var maxptime = 0;
		caps.codecs.forEach(function(codec) {
			if (codec.maxptime > maxptime) {
				maxptime = codec.maxptime;
			}
		});
		if (maxptime > 0) {
			sdp += 'a=maxptime:' + maxptime + '\r\n';
		}
		sdp += 'a=rtcp-mux\r\n';

		caps.headerExtensions.forEach(function(extension) {
			sdp += SDPUtils.writeExtmap(extension);
		});
		// FIXME: write fecMechanisms.
		return sdp;
	};

// Parses the SDP media section and returns an array of
// RTCRtpEncodingParameters.
	SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
		var encodingParameters = [];
		var description = SDPUtils.parseRtpParameters(mediaSection);
		var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
		var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;

		// filter a=ssrc:... cname:, ignore PlanB-msid
		var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
			.map(function(line) {
				return SDPUtils.parseSsrcMedia(line);
			})
			.filter(function(parts) {
				return parts.attribute === 'cname';
			});
		var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
		var secondarySsrc;

		var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
			.map(function(line) {
				var parts = line.split(' ');
				parts.shift();
				return parts.map(function(part) {
					return parseInt(part, 10);
				});
			});
		if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
			secondarySsrc = flows[0][1];
		}

		description.codecs.forEach(function(codec) {
			if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
				var encParam = {
					ssrc: primarySsrc,
					codecPayloadType: parseInt(codec.parameters.apt, 10),
					rtx: {
						ssrc: secondarySsrc
					}
				};
				encodingParameters.push(encParam);
				if (hasRed) {
					encParam = JSON.parse(JSON.stringify(encParam));
					encParam.fec = {
						ssrc: secondarySsrc,
						mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
					};
					encodingParameters.push(encParam);
				}
			}
		});
		if (encodingParameters.length === 0 && primarySsrc) {
			encodingParameters.push({
				ssrc: primarySsrc
			});
		}

		// we support both b=AS and b=TIAS but interpret AS as TIAS.
		var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
		if (bandwidth.length) {
			if (bandwidth[0].indexOf('b=TIAS:') === 0) {
				bandwidth = parseInt(bandwidth[0].substr(7), 10);
			} else if (bandwidth[0].indexOf('b=AS:') === 0) {
				bandwidth = parseInt(bandwidth[0].substr(5), 10);
			}
			encodingParameters.forEach(function(params) {
				params.maxBitrate = bandwidth;
			});
		}
		return encodingParameters;
	};

	SDPUtils.writeSessionBoilerplate = function() {
		// FIXME: sess-id should be an NTP timestamp.
		return 'v=0\r\n' +
			'o=thisisadapterortc 8169639915646943137 2 IN IP4 127.0.0.1\r\n' +
			's=-\r\n' +
			't=0 0\r\n';
	};

	SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) {
		var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);

		// Map ICE parameters (ufrag, pwd) to SDP.
		sdp += SDPUtils.writeIceParameters(
			transceiver.iceGatherer.getLocalParameters());

		// Map DTLS parameters to SDP.
		sdp += SDPUtils.writeDtlsParameters(
			transceiver.dtlsTransport.getLocalParameters(),
			type === 'offer' ? 'actpass' : 'active');

		sdp += 'a=mid:' + transceiver.mid + '\r\n';

		if (transceiver.rtpSender && transceiver.rtpReceiver) {
			sdp += 'a=sendrecv\r\n';
		} else if (transceiver.rtpSender) {
			sdp += 'a=sendonly\r\n';
		} else if (transceiver.rtpReceiver) {
			sdp += 'a=recvonly\r\n';
		} else {
			sdp += 'a=inactive\r\n';
		}

		// FIXME: for RTX there might be multiple SSRCs. Not implemented in Edge yet.
		if (transceiver.rtpSender) {
			var msid = 'msid:' + stream.id + ' ' +
				transceiver.rtpSender.track.id + '\r\n';
			sdp += 'a=' + msid;
			sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
				' ' + msid;
			if (transceiver.sendEncodingParameters[0].rtx) {
				sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
					' ' + msid;
				sdp += 'a=ssrc-group:FID ' +
					transceiver.sendEncodingParameters[0].ssrc + ' ' +
					transceiver.sendEncodingParameters[0].rtx.ssrc +
					'\r\n';
			}
		}
		// FIXME: this should be written by writeRtpDescription.
		sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
			' cname:' + SDPUtils.localCName + '\r\n';
		if (transceiver.rtpSender && transceiver.sendEncodingParameters[0].rtx) {
			sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].rtx.ssrc +
				' cname:' + SDPUtils.localCName + '\r\n';
		}
		return sdp;
	};

// Gets the direction from the mediaSection or the sessionpart.
	SDPUtils.getDirection = function(mediaSection, sessionpart) {
		// Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
		var lines = SDPUtils.splitLines(mediaSection);
		for (var i = 0; i < lines.length; i++) {
			switch (lines[i]) {
				case 'a=sendrecv':
				case 'a=sendonly':
				case 'a=recvonly':
				case 'a=inactive':
					return lines[i].substr(2);
				default:
				// FIXME: What should happen here?
			}
		}
		if (sessionpart) {
			return SDPUtils.getDirection(sessionpart);
		}
		return 'sendrecv';
	};

// Expose public methods.
	module.exports = SDPUtils;

},{}],63:[function(require,module,exports){

	module.exports = require('./lib/');

},{"./lib/":64}],64:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var url = require('./url');
	var parser = require('socket.io-parser');
	var Manager = require('./manager');
	var debug = require('debug')('socket.io-client');

	/**
	 * Module exports.
	 */

	module.exports = exports = lookup;

	/**
	 * Managers cache.
	 */

	var cache = exports.managers = {};

	/**
	 * Looks up an existing `Manager` for multiplexing.
	 * If the user summons:
	 *
	 *   `io('http://localhost/a');`
	 *   `io('http://localhost/b');`
	 *
	 * We reuse the existing instance based on same scheme/port/host,
	 * and we initialize sockets for each namespace.
	 *
	 * @api public
	 */

	function lookup(uri, opts) {
		if (typeof uri == 'object') {
			opts = uri;
			uri = undefined;
		}

		opts = opts || {};

		var parsed = url(uri);
		var source = parsed.source;
		var id = parsed.id;
		var io;

		if (opts.forceNew || opts['force new connection'] || false === opts.multiplex) {
			debug('ignoring socket cache for %s', source);
			io = Manager(source, opts);
		} else {
			if (!cache[id]) {
				debug('new io instance for %s', source);
				cache[id] = Manager(source, opts);
			}
			io = cache[id];
		}

		return io.socket(parsed.path);
	}

	/**
	 * Protocol version.
	 *
	 * @api public
	 */

	exports.protocol = parser.protocol;

	/**
	 * `connect`.
	 *
	 * @param {String} uri
	 * @api public
	 */

	exports.connect = lookup;

	/**
	 * Expose constructors for standalone build.
	 *
	 * @api public
	 */

	exports.Manager = require('./manager');
	exports.Socket = require('./socket');

},{"./manager":65,"./socket":67,"./url":68,"debug":69,"socket.io-parser":71}],65:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var url = require('./url');
	var eio = require('engine.io-client');
	var Socket = require('./socket');
	var Emitter = require('component-emitter');
	var parser = require('socket.io-parser');
	var on = require('./on');
	var bind = require('component-bind');
	var object = require('object-component');
	var debug = require('debug')('socket.io-client:manager');
	var indexOf = require('indexof');
	var Backoff = require('backo2');

	/**
	 * Module exports
	 */

	module.exports = Manager;

	/**
	 * `Manager` constructor.
	 *
	 * @param {String} engine instance or engine uri/opts
	 * @param {Object} options
	 * @api public
	 */

	function Manager(uri, opts){
		if (!(this instanceof Manager)) return new Manager(uri, opts);
		if (uri && ('object' == typeof uri)) {
			opts = uri;
			uri = undefined;
		}
		opts = opts || {};

		opts.path = opts.path || '/socket.io';
		this.nsps = {};
		this.subs = [];
		this.opts = opts;
		this.reconnection(opts.reconnection !== false);
		this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
		this.reconnectionDelay(opts.reconnectionDelay || 1000);
		this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
		this.randomizationFactor(opts.randomizationFactor || 0.5);
		this.backoff = new Backoff({
			min: this.reconnectionDelay(),
			max: this.reconnectionDelayMax(),
			jitter: this.randomizationFactor()
		});
		this.timeout(null == opts.timeout ? 20000 : opts.timeout);
		this.readyState = 'closed';
		this.uri = uri;
		this.connected = [];
		this.encoding = false;
		this.packetBuffer = [];
		this.encoder = new parser.Encoder();
		this.decoder = new parser.Decoder();
		this.autoConnect = opts.autoConnect !== false;
		if (this.autoConnect) this.open();
	}

	/**
	 * Propagate given event to sockets and emit on `this`
	 *
	 * @api private
	 */

	Manager.prototype.emitAll = function() {
		this.emit.apply(this, arguments);
		for (var nsp in this.nsps) {
			this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
		}
	};

	/**
	 * Update `socket.id` of all sockets
	 *
	 * @api private
	 */

	Manager.prototype.updateSocketIds = function(){
		for (var nsp in this.nsps) {
			this.nsps[nsp].id = this.engine.id;
		}
	};

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Manager.prototype);

	/**
	 * Sets the `reconnection` config.
	 *
	 * @param {Boolean} true/false if it should automatically reconnect
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnection = function(v){
		if (!arguments.length) return this._reconnection;
		this._reconnection = !!v;
		return this;
	};

	/**
	 * Sets the reconnection attempts config.
	 *
	 * @param {Number} max reconnection attempts before giving up
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionAttempts = function(v){
		if (!arguments.length) return this._reconnectionAttempts;
		this._reconnectionAttempts = v;
		return this;
	};

	/**
	 * Sets the delay between reconnections.
	 *
	 * @param {Number} delay
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionDelay = function(v){
		if (!arguments.length) return this._reconnectionDelay;
		this._reconnectionDelay = v;
		this.backoff && this.backoff.setMin(v);
		return this;
	};

	Manager.prototype.randomizationFactor = function(v){
		if (!arguments.length) return this._randomizationFactor;
		this._randomizationFactor = v;
		this.backoff && this.backoff.setJitter(v);
		return this;
	};

	/**
	 * Sets the maximum delay between reconnections.
	 *
	 * @param {Number} delay
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionDelayMax = function(v){
		if (!arguments.length) return this._reconnectionDelayMax;
		this._reconnectionDelayMax = v;
		this.backoff && this.backoff.setMax(v);
		return this;
	};

	/**
	 * Sets the connection timeout. `false` to disable
	 *
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.timeout = function(v){
		if (!arguments.length) return this._timeout;
		this._timeout = v;
		return this;
	};

	/**
	 * Starts trying to reconnect if reconnection is enabled and we have not
	 * started reconnecting yet
	 *
	 * @api private
	 */

	Manager.prototype.maybeReconnectOnOpen = function() {
		// Only try to reconnect if it's the first time we're connecting
		if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
			// keeps reconnection from firing twice for the same reconnection loop
			this.reconnect();
		}
	};


	/**
	 * Sets the current transport `socket`.
	 *
	 * @param {Function} optional, callback
	 * @return {Manager} self
	 * @api public
	 */

	Manager.prototype.open =
		Manager.prototype.connect = function(fn){
			debug('readyState %s', this.readyState);
			if (~this.readyState.indexOf('open')) return this;

			debug('opening %s', this.uri);
			this.engine = eio(this.uri, this.opts);
			var socket = this.engine;
			var self = this;
			this.readyState = 'opening';
			this.skipReconnect = false;

			// emit `open`
			var openSub = on(socket, 'open', function() {
				self.onopen();
				fn && fn();
			});

			// emit `connect_error`
			var errorSub = on(socket, 'error', function(data){
				debug('connect_error');
				self.cleanup();
				self.readyState = 'closed';
				self.emitAll('connect_error', data);
				if (fn) {
					var err = new Error('Connection error');
					err.data = data;
					fn(err);
				} else {
					// Only do this if there is no fn to handle the error
					self.maybeReconnectOnOpen();
				}
			});

			// emit `connect_timeout`
			if (false !== this._timeout) {
				var timeout = this._timeout;
				debug('connect attempt will timeout after %d', timeout);

				// set timer
				var timer = setTimeout(function(){
					debug('connect attempt timed out after %d', timeout);
					openSub.destroy();
					socket.close();
					socket.emit('error', 'timeout');
					self.emitAll('connect_timeout', timeout);
				}, timeout);

				this.subs.push({
					destroy: function(){
						clearTimeout(timer);
					}
				});
			}

			this.subs.push(openSub);
			this.subs.push(errorSub);

			return this;
		};

	/**
	 * Called upon transport open.
	 *
	 * @api private
	 */

	Manager.prototype.onopen = function(){
		debug('open');

		// clear old subs
		this.cleanup();

		// mark as open
		this.readyState = 'open';
		this.emit('open');

		// add new subs
		var socket = this.engine;
		this.subs.push(on(socket, 'data', bind(this, 'ondata')));
		this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
		this.subs.push(on(socket, 'error', bind(this, 'onerror')));
		this.subs.push(on(socket, 'close', bind(this, 'onclose')));
	};

	/**
	 * Called with data.
	 *
	 * @api private
	 */

	Manager.prototype.ondata = function(data){
		this.decoder.add(data);
	};

	/**
	 * Called when parser fully decodes a packet.
	 *
	 * @api private
	 */

	Manager.prototype.ondecoded = function(packet) {
		this.emit('packet', packet);
	};

	/**
	 * Called upon socket error.
	 *
	 * @api private
	 */

	Manager.prototype.onerror = function(err){
		debug('error', err);
		this.emitAll('error', err);
	};

	/**
	 * Creates a new socket for the given `nsp`.
	 *
	 * @return {Socket}
	 * @api public
	 */

	Manager.prototype.socket = function(nsp){
		var socket = this.nsps[nsp];
		if (!socket) {
			socket = new Socket(this, nsp);
			this.nsps[nsp] = socket;
			var self = this;
			socket.on('connect', function(){
				socket.id = self.engine.id;
				if (!~indexOf(self.connected, socket)) {
					self.connected.push(socket);
				}
			});
		}
		return socket;
	};

	/**
	 * Called upon a socket close.
	 *
	 * @param {Socket} socket
	 */

	Manager.prototype.destroy = function(socket){
		var index = indexOf(this.connected, socket);
		if (~index) this.connected.splice(index, 1);
		if (this.connected.length) return;

		this.close();
	};

	/**
	 * Writes a packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Manager.prototype.packet = function(packet){
		debug('writing packet %j', packet);
		var self = this;

		if (!self.encoding) {
			// encode, then write to engine with result
			self.encoding = true;
			this.encoder.encode(packet, function(encodedPackets) {
				for (var i = 0; i < encodedPackets.length; i++) {
					self.engine.write(encodedPackets[i]);
				}
				self.encoding = false;
				self.processPacketQueue();
			});
		} else { // add packet to the queue
			self.packetBuffer.push(packet);
		}
	};

	/**
	 * If packet buffer is non-empty, begins encoding the
	 * next packet in line.
	 *
	 * @api private
	 */

	Manager.prototype.processPacketQueue = function() {
		if (this.packetBuffer.length > 0 && !this.encoding) {
			var pack = this.packetBuffer.shift();
			this.packet(pack);
		}
	};

	/**
	 * Clean up transport subscriptions and packet buffer.
	 *
	 * @api private
	 */

	Manager.prototype.cleanup = function(){
		var sub;
		while (sub = this.subs.shift()) sub.destroy();

		this.packetBuffer = [];
		this.encoding = false;

		this.decoder.destroy();
	};

	/**
	 * Close the current socket.
	 *
	 * @api private
	 */

	Manager.prototype.close =
		Manager.prototype.disconnect = function(){
			this.skipReconnect = true;
			this.backoff.reset();
			this.readyState = 'closed';
			this.engine && this.engine.close();
		};

	/**
	 * Called upon engine close.
	 *
	 * @api private
	 */

	Manager.prototype.onclose = function(reason){
		debug('close');
		this.cleanup();
		this.backoff.reset();
		this.readyState = 'closed';
		this.emit('close', reason);
		if (this._reconnection && !this.skipReconnect) {
			this.reconnect();
		}
	};

	/**
	 * Attempt a reconnection.
	 *
	 * @api private
	 */

	Manager.prototype.reconnect = function(){
		if (this.reconnecting || this.skipReconnect) return this;

		var self = this;

		if (this.backoff.attempts >= this._reconnectionAttempts) {
			debug('reconnect failed');
			this.backoff.reset();
			this.emitAll('reconnect_failed');
			this.reconnecting = false;
		} else {
			var delay = this.backoff.duration();
			debug('will wait %dms before reconnect attempt', delay);

			this.reconnecting = true;
			var timer = setTimeout(function(){
				if (self.skipReconnect) return;

				debug('attempting reconnect');
				self.emitAll('reconnect_attempt', self.backoff.attempts);
				self.emitAll('reconnecting', self.backoff.attempts);

				// check again for the case socket closed in above events
				if (self.skipReconnect) return;

				self.open(function(err){
					if (err) {
						debug('reconnect attempt error');
						self.reconnecting = false;
						self.reconnect();
						self.emitAll('reconnect_error', err.data);
					} else {
						debug('reconnect success');
						self.onreconnect();
					}
				});
			}, delay);

			this.subs.push({
				destroy: function(){
					clearTimeout(timer);
				}
			});
		}
	};

	/**
	 * Called upon successful reconnect.
	 *
	 * @api private
	 */

	Manager.prototype.onreconnect = function(){
		var attempt = this.backoff.attempts;
		this.reconnecting = false;
		this.backoff.reset();
		this.updateSocketIds();
		this.emitAll('reconnect', attempt);
	};

},{"./on":66,"./socket":67,"./url":68,"backo2":4,"component-bind":7,"component-emitter":8,"debug":69,"engine.io-client":10,"indexof":44,"object-component":51,"socket.io-parser":71}],66:[function(require,module,exports){

	/**
	 * Module exports.
	 */

	module.exports = on;

	/**
	 * Helper for subscriptions.
	 *
	 * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
	 * @param {String} event name
	 * @param {Function} callback
	 * @api public
	 */

	function on(obj, ev, fn) {
		obj.on(ev, fn);
		return {
			destroy: function(){
				obj.removeListener(ev, fn);
			}
		};
	}

},{}],67:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var parser = require('socket.io-parser');
	var Emitter = require('component-emitter');
	var toArray = require('to-array');
	var on = require('./on');
	var bind = require('component-bind');
	var debug = require('debug')('socket.io-client:socket');
	var hasBin = require('has-binary');

	/**
	 * Module exports.
	 */

	module.exports = exports = Socket;

	/**
	 * Internal events (blacklisted).
	 * These events can't be emitted by the user.
	 *
	 * @api private
	 */

	var events = {
		connect: 1,
		connect_error: 1,
		connect_timeout: 1,
		disconnect: 1,
		error: 1,
		reconnect: 1,
		reconnect_attempt: 1,
		reconnect_failed: 1,
		reconnect_error: 1,
		reconnecting: 1
	};

	/**
	 * Shortcut to `Emitter#emit`.
	 */

	var emit = Emitter.prototype.emit;

	/**
	 * `Socket` constructor.
	 *
	 * @api public
	 */

	function Socket(io, nsp){
		this.io = io;
		this.nsp = nsp;
		this.json = this; // compat
		this.ids = 0;
		this.acks = {};
		if (this.io.autoConnect) this.open();
		this.receiveBuffer = [];
		this.sendBuffer = [];
		this.connected = false;
		this.disconnected = true;
	}

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Socket.prototype);

	/**
	 * Subscribe to open, close and packet events
	 *
	 * @api private
	 */

	Socket.prototype.subEvents = function() {
		if (this.subs) return;

		var io = this.io;
		this.subs = [
			on(io, 'open', bind(this, 'onopen')),
			on(io, 'packet', bind(this, 'onpacket')),
			on(io, 'close', bind(this, 'onclose'))
		];
	};

	/**
	 * "Opens" the socket.
	 *
	 * @api public
	 */

	Socket.prototype.open =
		Socket.prototype.connect = function(){
			if (this.connected) return this;

			this.subEvents();
			this.io.open(); // ensure open
			if ('open' == this.io.readyState) this.onopen();
			return this;
		};

	/**
	 * Sends a `message` event.
	 *
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.send = function(){
		var args = toArray(arguments);
		args.unshift('message');
		this.emit.apply(this, args);
		return this;
	};

	/**
	 * Override `emit`.
	 * If the event is in `events`, it's emitted normally.
	 *
	 * @param {String} event name
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.emit = function(ev){
		if (events.hasOwnProperty(ev)) {
			emit.apply(this, arguments);
			return this;
		}

		var args = toArray(arguments);
		var parserType = parser.EVENT; // default
		if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
		var packet = { type: parserType, data: args };

		// event ack callback
		if ('function' == typeof args[args.length - 1]) {
			debug('emitting packet with ack id %d', this.ids);
			this.acks[this.ids] = args.pop();
			packet.id = this.ids++;
		}

		if (this.connected) {
			this.packet(packet);
		} else {
			this.sendBuffer.push(packet);
		}

		return this;
	};

	/**
	 * Sends a packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.packet = function(packet){
		packet.nsp = this.nsp;
		this.io.packet(packet);
	};

	/**
	 * Called upon engine `open`.
	 *
	 * @api private
	 */

	Socket.prototype.onopen = function(){
		debug('transport is open - connecting');

		// write connect packet if necessary
		if ('/' != this.nsp) {
			this.packet({ type: parser.CONNECT });
		}
	};

	/**
	 * Called upon engine `close`.
	 *
	 * @param {String} reason
	 * @api private
	 */

	Socket.prototype.onclose = function(reason){
		debug('close (%s)', reason);
		this.connected = false;
		this.disconnected = true;
		delete this.id;
		this.emit('disconnect', reason);
	};

	/**
	 * Called with socket packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onpacket = function(packet){
		if (packet.nsp != this.nsp) return;

		switch (packet.type) {
			case parser.CONNECT:
				this.onconnect();
				break;

			case parser.EVENT:
				this.onevent(packet);
				break;

			case parser.BINARY_EVENT:
				this.onevent(packet);
				break;

			case parser.ACK:
				this.onack(packet);
				break;

			case parser.BINARY_ACK:
				this.onack(packet);
				break;

			case parser.DISCONNECT:
				this.ondisconnect();
				break;

			case parser.ERROR:
				this.emit('error', packet.data);
				break;
		}
	};

	/**
	 * Called upon a server event.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onevent = function(packet){
		var args = packet.data || [];
		debug('emitting event %j', args);

		if (null != packet.id) {
			debug('attaching ack callback to event');
			args.push(this.ack(packet.id));
		}

		if (this.connected) {
			emit.apply(this, args);
		} else {
			this.receiveBuffer.push(args);
		}
	};

	/**
	 * Produces an ack callback to emit with an event.
	 *
	 * @api private
	 */

	Socket.prototype.ack = function(id){
		var self = this;
		var sent = false;
		return function(){
			// prevent double callbacks
			if (sent) return;
			sent = true;
			var args = toArray(arguments);
			debug('sending ack %j', args);

			var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
			self.packet({
				type: type,
				id: id,
				data: args
			});
		};
	};

	/**
	 * Called upon a server acknowlegement.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onack = function(packet){
		debug('calling ack %s with %j', packet.id, packet.data);
		var fn = this.acks[packet.id];
		fn.apply(this, packet.data);
		delete this.acks[packet.id];
	};

	/**
	 * Called upon server connect.
	 *
	 * @api private
	 */

	Socket.prototype.onconnect = function(){
		this.connected = true;
		this.disconnected = false;
		this.emit('connect');
		this.emitBuffered();
	};

	/**
	 * Emit buffered events (received and emitted).
	 *
	 * @api private
	 */

	Socket.prototype.emitBuffered = function(){
		var i;
		for (i = 0; i < this.receiveBuffer.length; i++) {
			emit.apply(this, this.receiveBuffer[i]);
		}
		this.receiveBuffer = [];

		for (i = 0; i < this.sendBuffer.length; i++) {
			this.packet(this.sendBuffer[i]);
		}
		this.sendBuffer = [];
	};

	/**
	 * Called upon server disconnect.
	 *
	 * @api private
	 */

	Socket.prototype.ondisconnect = function(){
		debug('server disconnect (%s)', this.nsp);
		this.destroy();
		this.onclose('io server disconnect');
	};

	/**
	 * Called upon forced client/server side disconnections,
	 * this method ensures the manager stops tracking us and
	 * that reconnections don't get triggered for this.
	 *
	 * @api private.
	 */

	Socket.prototype.destroy = function(){
		if (this.subs) {
			// clean subscriptions to avoid reconnections
			for (var i = 0; i < this.subs.length; i++) {
				this.subs[i].destroy();
			}
			this.subs = null;
		}

		this.io.destroy(this);
	};

	/**
	 * Disconnects the socket manually.
	 *
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.close =
		Socket.prototype.disconnect = function(){
			if (this.connected) {
				debug('performing disconnect (%s)', this.nsp);
				this.packet({ type: parser.DISCONNECT });
			}

			// remove socket from pool
			this.destroy();

			if (this.connected) {
				// fire events
				this.onclose('io client disconnect');
			}
			return this;
		};

},{"./on":66,"component-bind":7,"component-emitter":8,"debug":69,"has-binary":41,"socket.io-parser":71,"to-array":75}],68:[function(require,module,exports){
	(function (global){

		/**
		 * Module dependencies.
		 */

		var parseuri = require('parseuri');
		var debug = require('debug')('socket.io-client:url');

		/**
		 * Module exports.
		 */

		module.exports = url;

		/**
		 * URL parser.
		 *
		 * @param {String} url
		 * @param {Object} An object meant to mimic window.location.
		 *                 Defaults to window.location.
		 * @api public
		 */

		function url(uri, loc){
			var obj = uri;

			// default to window.location
			var loc = loc || global.location;
			if (null == uri) uri = loc.protocol + '//' + loc.host;

			// relative path support
			if ('string' == typeof uri) {
				if ('/' == uri.charAt(0)) {
					if ('/' == uri.charAt(1)) {
						uri = loc.protocol + uri;
					} else {
						uri = loc.hostname + uri;
					}
				}

				if (!/^(https?|wss?):\/\//.test(uri)) {
					debug('protocol-less url %s', uri);
					if ('undefined' != typeof loc) {
						uri = loc.protocol + '//' + uri;
					} else {
						uri = 'https://' + uri;
					}
				}

				// parse
				debug('parse %s', uri);
				obj = parseuri(uri);
			}

			// make sure we treat `localhost:80` and `localhost` equally
			if (!obj.port) {
				if (/^(http|ws)$/.test(obj.protocol)) {
					obj.port = '80';
				}
				else if (/^(http|ws)s$/.test(obj.protocol)) {
					obj.port = '443';
				}
			}

			obj.path = obj.path || '/';

			// define unique id
			obj.id = obj.protocol + '://' + obj.host + ':' + obj.port;
			// define href
			obj.href = obj.protocol + '://' + obj.host + (loc && loc.port == obj.port ? '' : (':' + obj.port));

			return obj;
		}

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"debug":69,"parseuri":54}],69:[function(require,module,exports){

	/**
	 * Expose `debug()` as the module.
	 */

	module.exports = debug;

	/**
	 * Create a debugger with the given `name`.
	 *
	 * @param {String} name
	 * @return {Type}
	 * @api public
	 */

	function debug(name) {
		if (!debug.enabled(name)) return function(){};

		return function(fmt){
			fmt = coerce(fmt);

			var curr = new Date;
			var ms = curr - (debug[name] || curr);
			debug[name] = curr;

			fmt = name
				+ ' '
				+ fmt
				+ ' +' + debug.humanize(ms);

			// This hackery is required for IE8
			// where `console.log` doesn't have 'apply'
			window.console
			&& console.log
			&& Function.prototype.apply.call(console.log, console, arguments);
		}
	}

	/**
	 * The currently active debug mode names.
	 */

	debug.names = [];
	debug.skips = [];

	/**
	 * Enables a debug mode by name. This can include modes
	 * separated by a colon and wildcards.
	 *
	 * @param {String} name
	 * @api public
	 */

	debug.enable = function(name) {
		try {
			localStorage.debug = name;
		} catch(e){}

		var split = (name || '').split(/[\s,]+/)
			, len = split.length;

		for (var i = 0; i < len; i++) {
			name = split[i].replace('*', '.*?');
			if (name[0] === '-') {
				debug.skips.push(new RegExp('^' + name.substr(1) + '$'));
			}
			else {
				debug.names.push(new RegExp('^' + name + '$'));
			}
		}
	};

	/**
	 * Disable debug output.
	 *
	 * @api public
	 */

	debug.disable = function(){
		debug.enable('');
	};

	/**
	 * Humanize the given `ms`.
	 *
	 * @param {Number} m
	 * @return {String}
	 * @api private
	 */

	debug.humanize = function(ms) {
		var sec = 1000
			, min = 60 * 1000
			, hour = 60 * min;

		if (ms >= hour) return (ms / hour).toFixed(1) + 'h';
		if (ms >= min) return (ms / min).toFixed(1) + 'm';
		if (ms >= sec) return (ms / sec | 0) + 's';
		return ms + 'ms';
	};

	/**
	 * Returns true if the given mode name is enabled, false otherwise.
	 *
	 * @param {String} name
	 * @return {Boolean}
	 * @api public
	 */

	debug.enabled = function(name) {
		for (var i = 0, len = debug.skips.length; i < len; i++) {
			if (debug.skips[i].test(name)) {
				return false;
			}
		}
		for (var i = 0, len = debug.names.length; i < len; i++) {
			if (debug.names[i].test(name)) {
				return true;
			}
		}
		return false;
	};

	/**
	 * Coerce `val`.
	 */

	function coerce(val) {
		if (val instanceof Error) return val.stack || val.message;
		return val;
	}

// persist

	try {
		if (window.localStorage) debug.enable(localStorage.debug);
	} catch(e){}

},{}],70:[function(require,module,exports){
	(function (global){
		/*global Blob,File*/

		/**
		 * Module requirements
		 */

		var isArray = require('isarray');
		var isBuf = require('./is-buffer');

		/**
		 * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
		 * Anything with blobs or files should be fed through removeBlobs before coming
		 * here.
		 *
		 * @param {Object} packet - socket.io event packet
		 * @return {Object} with deconstructed packet and list of buffers
		 * @api public
		 */

		exports.deconstructPacket = function(packet){
			var buffers = [];
			var packetData = packet.data;

			function _deconstructPacket(data) {
				if (!data) return data;

				if (isBuf(data)) {
					var placeholder = { _placeholder: true, num: buffers.length };
					buffers.push(data);
					return placeholder;
				} else if (isArray(data)) {
					var newData = new Array(data.length);
					for (var i = 0; i < data.length; i++) {
						newData[i] = _deconstructPacket(data[i]);
					}
					return newData;
				} else if ('object' == typeof data && !(data instanceof Date)) {
					var newData = {};
					for (var key in data) {
						newData[key] = _deconstructPacket(data[key]);
					}
					return newData;
				}
				return data;
			}

			var pack = packet;
			pack.data = _deconstructPacket(packetData);
			pack.attachments = buffers.length; // number of binary 'attachments'
			return {packet: pack, buffers: buffers};
		};

		/**
		 * Reconstructs a binary packet from its placeholder packet and buffers
		 *
		 * @param {Object} packet - event packet with placeholders
		 * @param {Array} buffers - binary buffers to put in placeholder positions
		 * @return {Object} reconstructed packet
		 * @api public
		 */

		exports.reconstructPacket = function(packet, buffers) {
			var curPlaceHolder = 0;

			function _reconstructPacket(data) {
				if (data && data._placeholder) {
					var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
					return buf;
				} else if (isArray(data)) {
					for (var i = 0; i < data.length; i++) {
						data[i] = _reconstructPacket(data[i]);
					}
					return data;
				} else if (data && 'object' == typeof data) {
					for (var key in data) {
						data[key] = _reconstructPacket(data[key]);
					}
					return data;
				}
				return data;
			}

			packet.data = _reconstructPacket(packet.data);
			packet.attachments = undefined; // no longer useful
			return packet;
		};

		/**
		 * Asynchronously removes Blobs or Files from data via
		 * FileReader's readAsArrayBuffer method. Used before encoding
		 * data as msgpack. Calls callback with the blobless data.
		 *
		 * @param {Object} data
		 * @param {Function} callback
		 * @api private
		 */

		exports.removeBlobs = function(data, callback) {
			function _removeBlobs(obj, curKey, containingObject) {
				if (!obj) return obj;

				// convert any blob
				if ((global.Blob && obj instanceof Blob) ||
					(global.File && obj instanceof File)) {
					pendingBlobs++;

					// async filereader
					var fileReader = new FileReader();
					fileReader.onload = function() { // this.result == arraybuffer
						if (containingObject) {
							containingObject[curKey] = this.result;
						}
						else {
							bloblessData = this.result;
						}

						// if nothing pending its callback time
						if(! --pendingBlobs) {
							callback(bloblessData);
						}
					};

					fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
				} else if (isArray(obj)) { // handle array
					for (var i = 0; i < obj.length; i++) {
						_removeBlobs(obj[i], i, obj);
					}
				} else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
					for (var key in obj) {
						_removeBlobs(obj[key], key, obj);
					}
				}
			}

			var pendingBlobs = 0;
			var bloblessData = data;
			_removeBlobs(bloblessData);
			if (!pendingBlobs) {
				callback(bloblessData);
			}
		};

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./is-buffer":72,"isarray":74}],71:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var debug = require('debug')('socket.io-parser');
	var json = require('json3');
	var isArray = require('isarray');
	var Emitter = require('component-emitter');
	var binary = require('./binary');
	var isBuf = require('./is-buffer');

	/**
	 * Protocol version.
	 *
	 * @api public
	 */

	exports.protocol = 4;

	/**
	 * Packet types.
	 *
	 * @api public
	 */

	exports.types = [
		'CONNECT',
		'DISCONNECT',
		'EVENT',
		'BINARY_EVENT',
		'ACK',
		'BINARY_ACK',
		'ERROR'
	];

	/**
	 * Packet type `connect`.
	 *
	 * @api public
	 */

	exports.CONNECT = 0;

	/**
	 * Packet type `disconnect`.
	 *
	 * @api public
	 */

	exports.DISCONNECT = 1;

	/**
	 * Packet type `event`.
	 *
	 * @api public
	 */

	exports.EVENT = 2;

	/**
	 * Packet type `ack`.
	 *
	 * @api public
	 */

	exports.ACK = 3;

	/**
	 * Packet type `error`.
	 *
	 * @api public
	 */

	exports.ERROR = 4;

	/**
	 * Packet type 'binary event'
	 *
	 * @api public
	 */

	exports.BINARY_EVENT = 5;

	/**
	 * Packet type `binary ack`. For acks with binary arguments.
	 *
	 * @api public
	 */

	exports.BINARY_ACK = 6;

	/**
	 * Encoder constructor.
	 *
	 * @api public
	 */

	exports.Encoder = Encoder;

	/**
	 * Decoder constructor.
	 *
	 * @api public
	 */

	exports.Decoder = Decoder;

	/**
	 * A socket.io Encoder instance
	 *
	 * @api public
	 */

	function Encoder() {}

	/**
	 * Encode a packet as a single string if non-binary, or as a
	 * buffer sequence, depending on packet type.
	 *
	 * @param {Object} obj - packet object
	 * @param {Function} callback - function to handle encodings (likely engine.write)
	 * @return Calls callback with Array of encodings
	 * @api public
	 */

	Encoder.prototype.encode = function(obj, callback){
		debug('encoding packet %j', obj);

		if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
			encodeAsBinary(obj, callback);
		}
		else {
			var encoding = encodeAsString(obj);
			callback([encoding]);
		}
	};

	/**
	 * Encode packet as string.
	 *
	 * @param {Object} packet
	 * @return {String} encoded
	 * @api private
	 */

	function encodeAsString(obj) {
		var str = '';
		var nsp = false;

		// first is type
		str += obj.type;

		// attachments if we have them
		if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
			str += obj.attachments;
			str += '-';
		}

		// if we have a namespace other than `/`
		// we append it followed by a comma `,`
		if (obj.nsp && '/' != obj.nsp) {
			nsp = true;
			str += obj.nsp;
		}

		// immediately followed by the id
		if (null != obj.id) {
			if (nsp) {
				str += ',';
				nsp = false;
			}
			str += obj.id;
		}

		// json data
		if (null != obj.data) {
			if (nsp) str += ',';
			str += json.stringify(obj.data);
		}

		debug('encoded %j as %s', obj, str);
		return str;
	}

	/**
	 * Encode packet as 'buffer sequence' by removing blobs, and
	 * deconstructing packet into object with placeholders and
	 * a list of buffers.
	 *
	 * @param {Object} packet
	 * @return {Buffer} encoded
	 * @api private
	 */

	function encodeAsBinary(obj, callback) {

		function writeEncoding(bloblessData) {
			var deconstruction = binary.deconstructPacket(bloblessData);
			var pack = encodeAsString(deconstruction.packet);
			var buffers = deconstruction.buffers;

			buffers.unshift(pack); // add packet info to beginning of data list
			callback(buffers); // write all the buffers
		}

		binary.removeBlobs(obj, writeEncoding);
	}

	/**
	 * A socket.io Decoder instance
	 *
	 * @return {Object} decoder
	 * @api public
	 */

	function Decoder() {
		this.reconstructor = null;
	}

	/**
	 * Mix in `Emitter` with Decoder.
	 */

	Emitter(Decoder.prototype);

	/**
	 * Decodes an ecoded packet string into packet JSON.
	 *
	 * @param {String} obj - encoded packet
	 * @return {Object} packet
	 * @api public
	 */

	Decoder.prototype.add = function(obj) {
		var packet;
		if ('string' == typeof obj) {
			packet = decodeString(obj);
			if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
				this.reconstructor = new BinaryReconstructor(packet);

				// no attachments, labeled binary but no binary data to follow
				if (this.reconstructor.reconPack.attachments === 0) {
					this.emit('decoded', packet);
				}
			} else { // non-binary full packet
				this.emit('decoded', packet);
			}
		}
		else if (isBuf(obj) || obj.base64) { // raw binary data
			if (!this.reconstructor) {
				throw new Error('got binary data when not reconstructing a packet');
			} else {
				packet = this.reconstructor.takeBinaryData(obj);
				if (packet) { // received final buffer
					this.reconstructor = null;
					this.emit('decoded', packet);
				}
			}
		}
		else {
			throw new Error('Unknown type: ' + obj);
		}
	};

	/**
	 * Decode a packet String (JSON data)
	 *
	 * @param {String} str
	 * @return {Object} packet
	 * @api private
	 */

	function decodeString(str) {
		var p = {};
		var i = 0;

		// look up type
		p.type = Number(str.charAt(0));
		if (null == exports.types[p.type]) return error();

		// look up attachments if type binary
		if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
			var buf = '';
			while (str.charAt(++i) != '-') {
				buf += str.charAt(i);
				if (i == str.length) break;
			}
			if (buf != Number(buf) || str.charAt(i) != '-') {
				throw new Error('Illegal attachments');
			}
			p.attachments = Number(buf);
		}

		// look up namespace (if any)
		if ('/' == str.charAt(i + 1)) {
			p.nsp = '';
			while (++i) {
				var c = str.charAt(i);
				if (',' == c) break;
				p.nsp += c;
				if (i == str.length) break;
			}
		} else {
			p.nsp = '/';
		}

		// look up id
		var next = str.charAt(i + 1);
		if ('' !== next && Number(next) == next) {
			p.id = '';
			while (++i) {
				var c = str.charAt(i);
				if (null == c || Number(c) != c) {
					--i;
					break;
				}
				p.id += str.charAt(i);
				if (i == str.length) break;
			}
			p.id = Number(p.id);
		}

		// look up json data
		if (str.charAt(++i)) {
			try {
				p.data = json.parse(str.substr(i));
			} catch(e){
				return error();
			}
		}

		debug('decoded %s as %j', str, p);
		return p;
	}

	/**
	 * Deallocates a parser's resources
	 *
	 * @api public
	 */

	Decoder.prototype.destroy = function() {
		if (this.reconstructor) {
			this.reconstructor.finishedReconstruction();
		}
	};

	/**
	 * A manager of a binary event's 'buffer sequence'. Should
	 * be constructed whenever a packet of type BINARY_EVENT is
	 * decoded.
	 *
	 * @param {Object} packet
	 * @return {BinaryReconstructor} initialized reconstructor
	 * @api private
	 */

	function BinaryReconstructor(packet) {
		this.reconPack = packet;
		this.buffers = [];
	}

	/**
	 * Method to be called when binary data received from connection
	 * after a BINARY_EVENT packet.
	 *
	 * @param {Buffer | ArrayBuffer} binData - the raw binary data received
	 * @return {null | Object} returns null if more binary data is expected or
	 *   a reconstructed packet object if all buffers have been received.
	 * @api private
	 */

	BinaryReconstructor.prototype.takeBinaryData = function(binData) {
		this.buffers.push(binData);
		if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
			var packet = binary.reconstructPacket(this.reconPack, this.buffers);
			this.finishedReconstruction();
			return packet;
		}
		return null;
	};

	/**
	 * Cleans up binary packet reconstruction variables.
	 *
	 * @api private
	 */

	BinaryReconstructor.prototype.finishedReconstruction = function() {
		this.reconPack = null;
		this.buffers = [];
	};

	function error(data){
		return {
			type: exports.ERROR,
			data: 'parser error'
		};
	}

},{"./binary":70,"./is-buffer":72,"component-emitter":8,"debug":73,"isarray":74,"json3":45}],72:[function(require,module,exports){
	(function (global){

		module.exports = isBuf;

		/**
		 * Returns true if obj is a buffer or an arraybuffer.
		 *
		 * @api private
		 */

		function isBuf(obj) {
			return (global.Buffer && global.Buffer.isBuffer(obj)) ||
				(global.ArrayBuffer && obj instanceof ArrayBuffer);
		}

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],73:[function(require,module,exports){
	arguments[4][69][0].apply(exports,arguments)
},{"dup":69}],74:[function(require,module,exports){
	arguments[4][42][0].apply(exports,arguments)
},{"dup":42}],75:[function(require,module,exports){
	module.exports = toArray

	function toArray(list, index) {
		var array = []

		index = index || 0

		for (var i = index || 0; i < list.length; i++) {
			array[i - index] = list[i]
		}

		return array
	}

},{}],76:[function(require,module,exports){
// based on https://github.com/ESTOS/strophe.jingle/
// adds wildemitter support
	var util = require('util');
	var adapter = require('webrtc-adapter'); // jshint ignore:line
	var WildEmitter = require('wildemitter');

	function dumpSDP(description) {
		return {
			type: description.type,
			sdp: description.sdp
		};
	}

	function dumpStream(stream) {
		var info = {
			label: stream.id,
		};
		if (stream.getAudioTracks().length) {
			info.audio = stream.getAudioTracks().map(function (track) {
				return track.id;
			});
		}
		if (stream.getVideoTracks().length) {
			info.video = stream.getVideoTracks().map(function (track) {
				return track.id;
			});
		}
		return info;
	}

	function TraceablePeerConnection(config, constraints) {
		var self = this;
		WildEmitter.call(this);

		this.peerconnection = new window.RTCPeerConnection(config, constraints);

		this.trace = function (what, info) {
			self.emit('PeerConnectionTrace', {
				time: new Date(),
				type: what,
				value: info || ""
			});
		};

		this.onicecandidate = null;
		this.peerconnection.onicecandidate = function (event) {
			self.trace('onicecandidate', event.candidate);
			if (self.onicecandidate !== null) {
				self.onicecandidate(event);
			}
		};
		this.onaddstream = null;
		this.peerconnection.onaddstream = function (event) {
			self.trace('onaddstream', dumpStream(event.stream));
			if (self.onaddstream !== null) {
				self.onaddstream(event);
			}
		};
		this.onremovestream = null;
		this.peerconnection.onremovestream = function (event) {
			self.trace('onremovestream', dumpStream(event.stream));
			if (self.onremovestream !== null) {
				self.onremovestream(event);
			}
		};
		this.onsignalingstatechange = null;
		this.peerconnection.onsignalingstatechange = function (event) {
			self.trace('onsignalingstatechange', self.signalingState);
			if (self.onsignalingstatechange !== null) {
				self.onsignalingstatechange(event);
			}
		};
		this.oniceconnectionstatechange = null;
		this.peerconnection.oniceconnectionstatechange = function (event) {
			self.trace('oniceconnectionstatechange', self.iceConnectionState);
			if (self.oniceconnectionstatechange !== null) {
				self.oniceconnectionstatechange(event);
			}
		};
		this.onnegotiationneeded = null;
		this.peerconnection.onnegotiationneeded = function (event) {
			self.trace('onnegotiationneeded');
			if (self.onnegotiationneeded !== null) {
				self.onnegotiationneeded(event);
			}
		};
		self.ondatachannel = null;
		this.peerconnection.ondatachannel = function (event) {
			self.trace('ondatachannel', event);
			if (self.ondatachannel !== null) {
				self.ondatachannel(event);
			}
		};
		this.getLocalStreams = this.peerconnection.getLocalStreams.bind(this.peerconnection);
		this.getRemoteStreams = this.peerconnection.getRemoteStreams.bind(this.peerconnection);
	}

	util.inherits(TraceablePeerConnection, WildEmitter);

	['signalingState', 'iceConnectionState', 'localDescription', 'remoteDescription'].forEach(function (prop) {
		Object.defineProperty(TraceablePeerConnection.prototype, prop, {
			get: function () {
				return this.peerconnection[prop];
			}
		});
	});

	TraceablePeerConnection.prototype.addStream = function (stream) {
		this.trace('addStream', dumpStream(stream));
		this.peerconnection.addStream(stream);
	};

	TraceablePeerConnection.prototype.removeStream = function (stream) {
		this.trace('removeStream', dumpStream(stream));
		this.peerconnection.removeStream(stream);
	};

	TraceablePeerConnection.prototype.createDataChannel = function (label, opts) {
		this.trace('createDataChannel', label, opts);
		return this.peerconnection.createDataChannel(label, opts);
	};

	TraceablePeerConnection.prototype.setLocalDescription = function (description, successCallback, failureCallback) {
		var self = this;
		this.trace('setLocalDescription', dumpSDP(description));
		return this.peerconnection.setLocalDescription(
			description
		).then(
			function () {
				self.trace('setLocalDescriptionOnSuccess');
				if (successCallback) successCallback();
			},
			function (err) {
				self.trace('setLocalDescriptionOnFailure', err);
				if (failureCallback) failureCallback(err);
			}
		);
	};

	TraceablePeerConnection.prototype.setRemoteDescription = function (description, successCallback, failureCallback) {
		var self = this;
		this.trace('setRemoteDescription', dumpSDP(description));
		return this.peerconnection.setRemoteDescription(
			description
		).then(
			function () {
				self.trace('setRemoteDescriptionOnSuccess');
				if (successCallback) successCallback();
			},
			function (err) {
				self.trace('setRemoteDescriptionOnFailure', err);
				if (failureCallback) failureCallback(err);
			}
		);
	};

	TraceablePeerConnection.prototype.close = function () {
		this.trace('stopXXX');
		console.trace('Stop Trace');
		if (this.peerconnection.signalingState != 'closed') {
			this.peerconnection.close();
		}
	};

	TraceablePeerConnection.prototype.createOffer = function (successCallback, failureCallback, constraints) {
		var self = this;
		this.trace('createOffer', constraints);
		return this.peerconnection.createOffer(
			constraints
		).then(
			function (offer) {
				self.trace('createOfferOnSuccess', dumpSDP(offer));
				if (successCallback) successCallback(offer);
			},
			function (err) {
				self.trace('createOfferOnFailure', err);
				if (failureCallback) failureCallback(err);
			}
		);
	};

	TraceablePeerConnection.prototype.createAnswer = function (successCallback, failureCallback, constraints) {
		var self = this;
		this.trace('createAnswer', constraints);
		return this.peerconnection.createAnswer(
			constraints
		).then(
			function (answer) {
				self.trace('createAnswerOnSuccess', dumpSDP(answer));
				if (successCallback) successCallback(answer);
			},
			function (err) {
				self.trace('createAnswerOnFailure', err);
				if (failureCallback) failureCallback(err);
			}
		);
	};

	TraceablePeerConnection.prototype.addIceCandidate = function (candidate, successCallback, failureCallback) {
		var self = this;
		this.trace('addIceCandidate', candidate);
		return this.peerconnection.addIceCandidate(
			candidate
		).then(
			function () {
				//self.trace('addIceCandidateOnSuccess');
				if (successCallback) successCallback();
			},
			function (err) {
				self.trace('addIceCandidateOnFailure', err);
				if (failureCallback) failureCallback(err);
			}
		);
	};

	TraceablePeerConnection.prototype.getStats = function () {
		this.peerconnection.getStats.apply(this.peerconnection, arguments);
	};

	module.exports = TraceablePeerConnection;

},{"util":89,"webrtc-adapter":77,"wildemitter":100}],77:[function(require,module,exports){
	arguments[4][30][0].apply(exports,arguments)
},{"./chrome/chrome_shim":78,"./edge/edge_shim":80,"./firefox/firefox_shim":82,"./safari/safari_shim":84,"./utils":85,"dup":30}],78:[function(require,module,exports){
	arguments[4][31][0].apply(exports,arguments)
},{"../utils.js":85,"./getusermedia":79,"dup":31}],79:[function(require,module,exports){
	arguments[4][32][0].apply(exports,arguments)
},{"../utils.js":85,"dup":32}],80:[function(require,module,exports){
	arguments[4][33][0].apply(exports,arguments)
},{"../utils":85,"./getusermedia":81,"dup":33,"sdp":62}],81:[function(require,module,exports){
	arguments[4][34][0].apply(exports,arguments)
},{"dup":34}],82:[function(require,module,exports){
	arguments[4][35][0].apply(exports,arguments)
},{"../utils":85,"./getusermedia":83,"dup":35}],83:[function(require,module,exports){
	arguments[4][36][0].apply(exports,arguments)
},{"../utils":85,"dup":36}],84:[function(require,module,exports){
	arguments[4][37][0].apply(exports,arguments)
},{"dup":37}],85:[function(require,module,exports){
	arguments[4][38][0].apply(exports,arguments)
},{"dup":38}],86:[function(require,module,exports){
	(function (global){
		/*! https://mths.be/utf8js v2.0.0 by @mathias */
		;(function(root) {

			// Detect free variables `exports`
			var freeExports = typeof exports == 'object' && exports;

			// Detect free variable `module`
			var freeModule = typeof module == 'object' && module &&
				module.exports == freeExports && module;

			// Detect free variable `global`, from Node.js or Browserified code,
			// and use it as `root`
			var freeGlobal = typeof global == 'object' && global;
			if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
				root = freeGlobal;
			}

			/*--------------------------------------------------------------------------*/

			var stringFromCharCode = String.fromCharCode;

			// Taken from https://mths.be/punycode
			function ucs2decode(string) {
				var output = [];
				var counter = 0;
				var length = string.length;
				var value;
				var extra;
				while (counter < length) {
					value = string.charCodeAt(counter++);
					if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
						// high surrogate, and there is a next character
						extra = string.charCodeAt(counter++);
						if ((extra & 0xFC00) == 0xDC00) { // low surrogate
							output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
						} else {
							// unmatched surrogate; only append this code unit, in case the next
							// code unit is the high surrogate of a surrogate pair
							output.push(value);
							counter--;
						}
					} else {
						output.push(value);
					}
				}
				return output;
			}

			// Taken from https://mths.be/punycode
			function ucs2encode(array) {
				var length = array.length;
				var index = -1;
				var value;
				var output = '';
				while (++index < length) {
					value = array[index];
					if (value > 0xFFFF) {
						value -= 0x10000;
						output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
						value = 0xDC00 | value & 0x3FF;
					}
					output += stringFromCharCode(value);
				}
				return output;
			}

			function checkScalarValue(codePoint) {
				if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
					throw Error(
						'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
						' is not a scalar value'
					);
				}
			}
			/*--------------------------------------------------------------------------*/

			function createByte(codePoint, shift) {
				return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
			}

			function encodeCodePoint(codePoint) {
				if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
					return stringFromCharCode(codePoint);
				}
				var symbol = '';
				if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
					symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
				}
				else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
					checkScalarValue(codePoint);
					symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
					symbol += createByte(codePoint, 6);
				}
				else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
					symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
					symbol += createByte(codePoint, 12);
					symbol += createByte(codePoint, 6);
				}
				symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
				return symbol;
			}

			function utf8encode(string) {
				var codePoints = ucs2decode(string);
				var length = codePoints.length;
				var index = -1;
				var codePoint;
				var byteString = '';
				while (++index < length) {
					codePoint = codePoints[index];
					byteString += encodeCodePoint(codePoint);
				}
				return byteString;
			}

			/*--------------------------------------------------------------------------*/

			function readContinuationByte() {
				if (byteIndex >= byteCount) {
					throw Error('Invalid byte index');
				}

				var continuationByte = byteArray[byteIndex] & 0xFF;
				byteIndex++;

				if ((continuationByte & 0xC0) == 0x80) {
					return continuationByte & 0x3F;
				}

				// If we end up here, it’s not a continuation byte
				throw Error('Invalid continuation byte');
			}

			function decodeSymbol() {
				var byte1;
				var byte2;
				var byte3;
				var byte4;
				var codePoint;

				if (byteIndex > byteCount) {
					throw Error('Invalid byte index');
				}

				if (byteIndex == byteCount) {
					return false;
				}

				// Read first byte
				byte1 = byteArray[byteIndex] & 0xFF;
				byteIndex++;

				// 1-byte sequence (no continuation bytes)
				if ((byte1 & 0x80) == 0) {
					return byte1;
				}

				// 2-byte sequence
				if ((byte1 & 0xE0) == 0xC0) {
					var byte2 = readContinuationByte();
					codePoint = ((byte1 & 0x1F) << 6) | byte2;
					if (codePoint >= 0x80) {
						return codePoint;
					} else {
						throw Error('Invalid continuation byte');
					}
				}

				// 3-byte sequence (may include unpaired surrogates)
				if ((byte1 & 0xF0) == 0xE0) {
					byte2 = readContinuationByte();
					byte3 = readContinuationByte();
					codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
					if (codePoint >= 0x0800) {
						checkScalarValue(codePoint);
						return codePoint;
					} else {
						throw Error('Invalid continuation byte');
					}
				}

				// 4-byte sequence
				if ((byte1 & 0xF8) == 0xF0) {
					byte2 = readContinuationByte();
					byte3 = readContinuationByte();
					byte4 = readContinuationByte();
					codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
						(byte3 << 0x06) | byte4;
					if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
						return codePoint;
					}
				}

				throw Error('Invalid UTF-8 detected');
			}

			var byteArray;
			var byteCount;
			var byteIndex;
			function utf8decode(byteString) {
				byteArray = ucs2decode(byteString);
				byteCount = byteArray.length;
				byteIndex = 0;
				var codePoints = [];
				var tmp;
				while ((tmp = decodeSymbol()) !== false) {
					codePoints.push(tmp);
				}
				return ucs2encode(codePoints);
			}

			/*--------------------------------------------------------------------------*/

			var utf8 = {
				'version': '2.0.0',
				'encode': utf8encode,
				'decode': utf8decode
			};

			// Some AMD build optimizers, like r.js, check for specific condition patterns
			// like the following:
			if (
				typeof define == 'function' &&
				typeof define.amd == 'object' &&
				define.amd
			) {
				define(function() {
					return utf8;
				});
			}	else if (freeExports && !freeExports.nodeType) {
				if (freeModule) { // in Node.js or RingoJS v0.8.0+
					freeModule.exports = utf8;
				} else { // in Narwhal or RingoJS v0.7.0-
					var object = {};
					var hasOwnProperty = object.hasOwnProperty;
					for (var key in utf8) {
						hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
					}
				}
			} else { // in Rhino or a web browser
				root.utf8 = utf8;
			}

		}(this));

	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],87:[function(require,module,exports){
	if (typeof Object.create === 'function') {
		// implementation from standard node.js 'util' module
		module.exports = function inherits(ctor, 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) {
			ctor.super_ = superCtor
			var TempCtor = function () {}
			TempCtor.prototype = superCtor.prototype
			ctor.prototype = new TempCtor()
			ctor.prototype.constructor = ctor
		}
	}

},{}],88:[function(require,module,exports){
	module.exports = function isBuffer(arg) {
		return arg && typeof arg === 'object'
			&& typeof arg.copy === 'function'
			&& typeof arg.fill === 'function'
			&& typeof arg.readUInt8 === 'function';
	}
},{}],89:[function(require,module,exports){
	(function (process,global){
// 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 formatRegExp = /%[sdj%]/g;
		exports.format = function(f) {
			if (!isString(f)) {
				var objects = [];
				for (var i = 0; i < arguments.length; i++) {
					objects.push(inspect(arguments[i]));
				}
				return objects.join(' ');
			}

			var i = 1;
			var args = arguments;
			var len = args.length;
			var str = String(f).replace(formatRegExp, function(x) {
				if (x === '%%') return '%';
				if (i >= len) return x;
				switch (x) {
					case '%s': return String(args[i++]);
					case '%d': return Number(args[i++]);
					case '%j':
						try {
							return JSON.stringify(args[i++]);
						} catch (_) {
							return '[Circular]';
						}
					default:
						return x;
				}
			});
			for (var x = args[i]; i < len; x = args[++i]) {
				if (isNull(x) || !isObject(x)) {
					str += ' ' + x;
				} else {
					str += ' ' + inspect(x);
				}
			}
			return str;
		};


// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
		exports.deprecate = function(fn, msg) {
			// Allow for deprecating things in the process of starting up.
			if (isUndefined(global.process)) {
				return function() {
					return exports.deprecate(fn, msg).apply(this, arguments);
				};
			}

			if (process.noDeprecation === true) {
				return fn;
			}

			var warned = false;
			function deprecated() {
				if (!warned) {
					if (process.throwDeprecation) {
						throw new Error(msg);
					} else if (process.traceDeprecation) {
						console.trace(msg);
					} else {
						console.error(msg);
					}
					warned = true;
				}
				return fn.apply(this, arguments);
			}

			return deprecated;
		};


		var debugs = {};
		var debugEnviron;
		exports.debuglog = function(set) {
			if (isUndefined(debugEnviron))
				debugEnviron = process.env.NODE_DEBUG || '';
			set = set.toUpperCase();
			if (!debugs[set]) {
				if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
					var pid = process.pid;
					debugs[set] = function() {
						var msg = exports.format.apply(exports, arguments);
						console.error('%s %d: %s', set, pid, msg);
					};
				} else {
					debugs[set] = function() {};
				}
			}
			return debugs[set];
		};


		/**
		 * Echos the value of a value. Trys to print the value out
		 * in the best way possible given the different types.
		 *
		 * @param {Object} obj The object to print out.
		 * @param {Object} opts Optional options object that alters the output.
		 */
		/* legacy: obj, showHidden, depth, colors*/
		function inspect(obj, opts) {
			// default options
			var ctx = {
				seen: [],
				stylize: stylizeNoColor
			};
			// legacy...
			if (arguments.length >= 3) ctx.depth = arguments[2];
			if (arguments.length >= 4) ctx.colors = arguments[3];
			if (isBoolean(opts)) {
				// legacy...
				ctx.showHidden = opts;
			} else if (opts) {
				// got an "options" object
				exports._extend(ctx, opts);
			}
			// set default options
			if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
			if (isUndefined(ctx.depth)) ctx.depth = 2;
			if (isUndefined(ctx.colors)) ctx.colors = false;
			if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
			if (ctx.colors) ctx.stylize = stylizeWithColor;
			return formatValue(ctx, obj, ctx.depth);
		}
		exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
		inspect.colors = {
			'bold' : [1, 22],
			'italic' : [3, 23],
			'underline' : [4, 24],
			'inverse' : [7, 27],
			'white' : [37, 39],
			'grey' : [90, 39],
			'black' : [30, 39],
			'blue' : [34, 39],
			'cyan' : [36, 39],
			'green' : [32, 39],
			'magenta' : [35, 39],
			'red' : [31, 39],
			'yellow' : [33, 39]
		};

// Don't use 'blue' not visible on cmd.exe
		inspect.styles = {
			'special': 'cyan',
			'number': 'yellow',
			'boolean': 'yellow',
			'undefined': 'grey',
			'null': 'bold',
			'string': 'green',
			'date': 'magenta',
			// "name": intentionally not styling
			'regexp': 'red'
		};


		function stylizeWithColor(str, styleType) {
			var style = inspect.styles[styleType];

			if (style) {
				return '\u001b[' + inspect.colors[style][0] + 'm' + str +
					'\u001b[' + inspect.colors[style][1] + 'm';
			} else {
				return str;
			}
		}


		function stylizeNoColor(str, styleType) {
			return str;
		}


		function arrayToHash(array) {
			var hash = {};

			array.forEach(function(val, idx) {
				hash[val] = true;
			});

			return hash;
		}


		function formatValue(ctx, value, recurseTimes) {
			// Provide a hook for user-specified inspect functions.
			// Check that value is an object with an inspect function on it
			if (ctx.customInspect &&
				value &&
				isFunction(value.inspect) &&
				// Filter out the util module, it's inspect function is special
				value.inspect !== exports.inspect &&
				// Also filter out any prototype objects using the circular check.
				!(value.constructor && value.constructor.prototype === value)) {
				var ret = value.inspect(recurseTimes, ctx);
				if (!isString(ret)) {
					ret = formatValue(ctx, ret, recurseTimes);
				}
				return ret;
			}

			// Primitive types cannot have properties
			var primitive = formatPrimitive(ctx, value);
			if (primitive) {
				return primitive;
			}

			// Look up the keys of the object.
			var keys = Object.keys(value);
			var visibleKeys = arrayToHash(keys);

			if (ctx.showHidden) {
				keys = Object.getOwnPropertyNames(value);
			}

			// IE doesn't make error fields non-enumerable
			// http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
			if (isError(value)
				&& (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
				return formatError(value);
			}

			// Some type of object without properties can be shortcutted.
			if (keys.length === 0) {
				if (isFunction(value)) {
					var name = value.name ? ': ' + value.name : '';
					return ctx.stylize('[Function' + name + ']', 'special');
				}
				if (isRegExp(value)) {
					return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
				}
				if (isDate(value)) {
					return ctx.stylize(Date.prototype.toString.call(value), 'date');
				}
				if (isError(value)) {
					return formatError(value);
				}
			}

			var base = '', array = false, braces = ['{', '}'];

			// Make Array say that they are Array
			if (isArray(value)) {
				array = true;
				braces = ['[', ']'];
			}

			// Make functions say that they are functions
			if (isFunction(value)) {
				var n = value.name ? ': ' + value.name : '';
				base = ' [Function' + n + ']';
			}

			// Make RegExps say that they are RegExps
			if (isRegExp(value)) {
				base = ' ' + RegExp.prototype.toString.call(value);
			}

			// Make dates with properties first say the date
			if (isDate(value)) {
				base = ' ' + Date.prototype.toUTCString.call(value);
			}

			// Make error with message first say the error
			if (isError(value)) {
				base = ' ' + formatError(value);
			}

			if (keys.length === 0 && (!array || value.length == 0)) {
				return braces[0] + base + braces[1];
			}

			if (recurseTimes < 0) {
				if (isRegExp(value)) {
					return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
				} else {
					return ctx.stylize('[Object]', 'special');
				}
			}

			ctx.seen.push(value);

			var output;
			if (array) {
				output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
			} else {
				output = keys.map(function(key) {
					return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
				});
			}

			ctx.seen.pop();

			return reduceToSingleString(output, base, braces);
		}


		function formatPrimitive(ctx, value) {
			if (isUndefined(value))
				return ctx.stylize('undefined', 'undefined');
			if (isString(value)) {
				var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
						.replace(/'/g, "\\'")
						.replace(/\\"/g, '"') + '\'';
				return ctx.stylize(simple, 'string');
			}
			if (isNumber(value))
				return ctx.stylize('' + value, 'number');
			if (isBoolean(value))
				return ctx.stylize('' + value, 'boolean');
			// For some reason typeof null is "object", so special case here.
			if (isNull(value))
				return ctx.stylize('null', 'null');
		}


		function formatError(value) {
			return '[' + Error.prototype.toString.call(value) + ']';
		}


		function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
			var output = [];
			for (var i = 0, l = value.length; i < l; ++i) {
				if (hasOwnProperty(value, String(i))) {
					output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
						String(i), true));
				} else {
					output.push('');
				}
			}
			keys.forEach(function(key) {
				if (!key.match(/^\d+$/)) {
					output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
						key, true));
				}
			});
			return output;
		}


		function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
			var name, str, desc;
			desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
			if (desc.get) {
				if (desc.set) {
					str = ctx.stylize('[Getter/Setter]', 'special');
				} else {
					str = ctx.stylize('[Getter]', 'special');
				}
			} else {
				if (desc.set) {
					str = ctx.stylize('[Setter]', 'special');
				}
			}
			if (!hasOwnProperty(visibleKeys, key)) {
				name = '[' + key + ']';
			}
			if (!str) {
				if (ctx.seen.indexOf(desc.value) < 0) {
					if (isNull(recurseTimes)) {
						str = formatValue(ctx, desc.value, null);
					} else {
						str = formatValue(ctx, desc.value, recurseTimes - 1);
					}
					if (str.indexOf('\n') > -1) {
						if (array) {
							str = str.split('\n').map(function(line) {
								return '  ' + line;
							}).join('\n').substr(2);
						} else {
							str = '\n' + str.split('\n').map(function(line) {
									return '   ' + line;
								}).join('\n');
						}
					}
				} else {
					str = ctx.stylize('[Circular]', 'special');
				}
			}
			if (isUndefined(name)) {
				if (array && key.match(/^\d+$/)) {
					return str;
				}
				name = JSON.stringify('' + key);
				if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
					name = name.substr(1, name.length - 2);
					name = ctx.stylize(name, 'name');
				} else {
					name = name.replace(/'/g, "\\'")
						.replace(/\\"/g, '"')
						.replace(/(^"|"$)/g, "'");
					name = ctx.stylize(name, 'string');
				}
			}

			return name + ': ' + str;
		}


		function reduceToSingleString(output, base, braces) {
			var numLinesEst = 0;
			var length = output.reduce(function(prev, cur) {
				numLinesEst++;
				if (cur.indexOf('\n') >= 0) numLinesEst++;
				return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
			}, 0);

			if (length > 60) {
				return braces[0] +
					(base === '' ? '' : base + '\n ') +
					' ' +
					output.join(',\n  ') +
					' ' +
					braces[1];
			}

			return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
		}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
		function isArray(ar) {
			return Array.isArray(ar);
		}
		exports.isArray = isArray;

		function isBoolean(arg) {
			return typeof arg === 'boolean';
		}
		exports.isBoolean = isBoolean;

		function isNull(arg) {
			return arg === null;
		}
		exports.isNull = isNull;

		function isNullOrUndefined(arg) {
			return arg == null;
		}
		exports.isNullOrUndefined = isNullOrUndefined;

		function isNumber(arg) {
			return typeof arg === 'number';
		}
		exports.isNumber = isNumber;

		function isString(arg) {
			return typeof arg === 'string';
		}
		exports.isString = isString;

		function isSymbol(arg) {
			return typeof arg === 'symbol';
		}
		exports.isSymbol = isSymbol;

		function isUndefined(arg) {
			return arg === void 0;
		}
		exports.isUndefined = isUndefined;

		function isRegExp(re) {
			return isObject(re) && objectToString(re) === '[object RegExp]';
		}
		exports.isRegExp = isRegExp;

		function isObject(arg) {
			return typeof arg === 'object' && arg !== null;
		}
		exports.isObject = isObject;

		function isDate(d) {
			return isObject(d) && objectToString(d) === '[object Date]';
		}
		exports.isDate = isDate;

		function isError(e) {
			return isObject(e) &&
				(objectToString(e) === '[object Error]' || e instanceof Error);
		}
		exports.isError = isError;

		function isFunction(arg) {
			return typeof arg === 'function';
		}
		exports.isFunction = isFunction;

		function isPrimitive(arg) {
			return arg === null ||
				typeof arg === 'boolean' ||
				typeof arg === 'number' ||
				typeof arg === 'string' ||
				typeof arg === 'symbol' ||  // ES6 symbol
				typeof arg === 'undefined';
		}
		exports.isPrimitive = isPrimitive;

		exports.isBuffer = require('./support/isBuffer');

		function objectToString(o) {
			return Object.prototype.toString.call(o);
		}


		function pad(n) {
			return n < 10 ? '0' + n.toString(10) : n.toString(10);
		}


		var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
			'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
		function timestamp() {
			var d = new Date();
			var time = [pad(d.getHours()),
				pad(d.getMinutes()),
				pad(d.getSeconds())].join(':');
			return [d.getDate(), months[d.getMonth()], time].join(' ');
		}


// log is just a thin wrapper to console.log that prepends a timestamp
		exports.log = function() {
			console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
		};


		/**
		 * Inherit the prototype methods from one constructor into another.
		 *
		 * The Function.prototype.inherits from lang.js rewritten as a standalone
		 * function (not on Function.prototype). NOTE: If this file is to be loaded
		 * during bootstrapping this function needs to be rewritten using some native
		 * functions as prototype setup using normal JavaScript does not work as
		 * expected during bootstrapping (see mirror.js in r114903).
		 *
		 * @param {function} ctor Constructor function which needs to inherit the
		 *     prototype.
		 * @param {function} superCtor Constructor function to inherit prototype from.
		 */
		exports.inherits = require('inherits');

		exports._extend = function(origin, add) {
			// Don't do anything if add isn't an object
			if (!add || !isObject(add)) return origin;

			var keys = Object.keys(add);
			var i = keys.length;
			while (i--) {
				origin[keys[i]] = add[keys[i]];
			}
			return origin;
		};

		function hasOwnProperty(obj, prop) {
			return Object.prototype.hasOwnProperty.call(obj, prop);
		}

	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./support/isBuffer":88,"_process":55,"inherits":87}],90:[function(require,module,exports){
	arguments[4][30][0].apply(exports,arguments)
},{"./chrome/chrome_shim":91,"./edge/edge_shim":93,"./firefox/firefox_shim":95,"./safari/safari_shim":97,"./utils":98,"dup":30}],91:[function(require,module,exports){

	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';
	var logging = require('../utils.js').log;
	var browserDetails = require('../utils.js').browserDetails;

	var chromeShim = {
		shimMediaStream: function() {
			window.MediaStream = window.MediaStream || window.webkitMediaStream;
		},

		shimOnTrack: function() {
			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
				window.RTCPeerConnection.prototype)) {
				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
					get: function() {
						return this._ontrack;
					},
					set: function(f) {
						var self = this;
						if (this._ontrack) {
							this.removeEventListener('track', this._ontrack);
							this.removeEventListener('addstream', this._ontrackpoly);
						}
						this.addEventListener('track', this._ontrack = f);
						this.addEventListener('addstream', this._ontrackpoly = function(e) {
							// onaddstream does not fire when a track is added to an existing
							// stream. But stream.onaddtrack is implemented so we use that.
							e.stream.addEventListener('addtrack', function(te) {
								var event = new Event('track');
								event.track = te.track;
								event.receiver = {track: te.track};
								event.streams = [e.stream];
								self.dispatchEvent(event);
							});
							e.stream.getTracks().forEach(function(track) {
								var event = new Event('track');
								event.track = track;
								event.receiver = {track: track};
								event.streams = [e.stream];
								this.dispatchEvent(event);
							}.bind(this));
						}.bind(this));
					}
				});
			}
		},

		shimSourceObject: function() {
			if (typeof window === 'object') {
				if (window.HTMLMediaElement &&
					!('srcObject' in window.HTMLMediaElement.prototype)) {
					// Shim the srcObject property, once, when HTMLMediaElement is found.
					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
						get: function() {
							return this._srcObject;
						},
						set: function(stream) {
							var self = this;
							// Use _srcObject as a private property for this shim
							this._srcObject = stream;
							if (this.src) {
								URL.revokeObjectURL(this.src);
							}

							if (!stream) {
								this.src = '';
								return;
							}
							this.src = URL.createObjectURL(stream);
							// We need to recreate the blob url when a track is added or
							// removed. Doing it manually since we want to avoid a recursion.
							stream.addEventListener('addtrack', function() {
								if (self.src) {
									URL.revokeObjectURL(self.src);
								}
								self.src = URL.createObjectURL(stream);
							});
							stream.addEventListener('removetrack', function() {
								if (self.src) {
									URL.revokeObjectURL(self.src);
								}
								self.src = URL.createObjectURL(stream);
							});
						}
					});
				}
			}
		},

		shimPeerConnection: function() {
			// The RTCPeerConnection object.
			window.RTCPeerConnection = function(pcConfig, pcConstraints) {
				// Translate iceTransportPolicy to iceTransports,
				// see https://code.google.com/p/webrtc/issues/detail?id=4869
				logging('PeerConnection');
				if (pcConfig && pcConfig.iceTransportPolicy) {
					pcConfig.iceTransports = pcConfig.iceTransportPolicy;
				}

				var pc = new webkitRTCPeerConnection(pcConfig, pcConstraints);
				var origGetStats = pc.getStats.bind(pc);
				pc.getStats = function(selector, successCallback, errorCallback) {
					var self = this;
					var args = arguments;

					// If selector is a function then we are in the old style stats so just
					// pass back the original getStats format to avoid breaking old users.
					if (arguments.length > 0 && typeof selector === 'function') {
						return origGetStats(selector, successCallback);
					}

					var fixChromeStats_ = function(response) {
						var standardReport = {};
						var reports = response.result();
						reports.forEach(function(report) {
							var standardStats = {
								id: report.id,
								timestamp: report.timestamp,
								type: report.type
							};
							report.names().forEach(function(name) {
								standardStats[name] = report.stat(name);
							});
							standardReport[standardStats.id] = standardStats;
						});

						return standardReport;
					};

					// shim getStats with maplike support
					var makeMapStats = function(stats, legacyStats) {
						var map = new Map(Object.keys(stats).map(function(key) {
							return[key, stats[key]];
						}));
						legacyStats = legacyStats || stats;
						Object.keys(legacyStats).forEach(function(key) {
							map[key] = legacyStats[key];
						});
						return map;
					};

					if (arguments.length >= 2) {
						var successCallbackWrapper_ = function(response) {
							args[1](makeMapStats(fixChromeStats_(response)));
						};

						return origGetStats.apply(this, [successCallbackWrapper_,
							arguments[0]]);
					}

					// promise-support
					return new Promise(function(resolve, reject) {
						if (args.length === 1 && typeof selector === 'object') {
							origGetStats.apply(self, [
								function(response) {
									resolve(makeMapStats(fixChromeStats_(response)));
								}, reject]);
						} else {
							// Preserve legacy chrome stats only on legacy access of stats obj
							origGetStats.apply(self, [
								function(response) {
									resolve(makeMapStats(fixChromeStats_(response),
										response.result()));
								}, reject]);
						}
					}).then(successCallback, errorCallback);
				};

				return pc;
			};
			window.RTCPeerConnection.prototype = webkitRTCPeerConnection.prototype;

			// wrap static methods. Currently just generateCertificate.
			if (webkitRTCPeerConnection.generateCertificate) {
				Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
					get: function() {
						return webkitRTCPeerConnection.generateCertificate;
					}
				});
			}

			['createOffer', 'createAnswer'].forEach(function(method) {
				var nativeMethod = webkitRTCPeerConnection.prototype[method];
				webkitRTCPeerConnection.prototype[method] = function() {
					var self = this;
					if (arguments.length < 1 || (arguments.length === 1 &&
						typeof arguments[0] === 'object')) {
						var opts = arguments.length === 1 ? arguments[0] : undefined;
						return new Promise(function(resolve, reject) {
							nativeMethod.apply(self, [resolve, reject, opts]);
						});
					}
					return nativeMethod.apply(this, arguments);
				};
			});

			// add promise support -- natively available in Chrome 51
			if (browserDetails.version < 51) {
				['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
					.forEach(function(method) {
						var nativeMethod = webkitRTCPeerConnection.prototype[method];
						webkitRTCPeerConnection.prototype[method] = function() {
							var args = arguments;
							var self = this;
							var promise = new Promise(function(resolve, reject) {
								nativeMethod.apply(self, [args[0], resolve, reject]);
							});
							if (args.length < 2) {
								return promise;
							}
							return promise.then(function() {
									args[1].apply(null, []);
								},
								function(err) {
									if (args.length >= 3) {
										args[2].apply(null, [err]);
									}
								});
						};
					});
			}

			// shim implicit creation of RTCSessionDescription/RTCIceCandidate
			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
				.forEach(function(method) {
					var nativeMethod = webkitRTCPeerConnection.prototype[method];
					webkitRTCPeerConnection.prototype[method] = function() {
						arguments[0] = new ((method === 'addIceCandidate') ?
							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
						return nativeMethod.apply(this, arguments);
					};
				});

			// support for addIceCandidate(null or undefined)
			var nativeAddIceCandidate =
				RTCPeerConnection.prototype.addIceCandidate;
			RTCPeerConnection.prototype.addIceCandidate = function() {
				if (!arguments[0]) {
					if (arguments[1]) {
						arguments[1].apply(null);
					}
					return Promise.resolve();
				}
				return nativeAddIceCandidate.apply(this, arguments);
			};
		}
	};


// Expose public methods.
	module.exports = {
		shimMediaStream: chromeShim.shimMediaStream,
		shimOnTrack: chromeShim.shimOnTrack,
		shimSourceObject: chromeShim.shimSourceObject,
		shimPeerConnection: chromeShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia')
	};

},{"../utils.js":98,"./getusermedia":92}],92:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';
	var logging = require('../utils.js').log;

// Expose public methods.
	module.exports = function() {
		var constraintsToChrome_ = function(c) {
			if (typeof c !== 'object' || c.mandatory || c.optional) {
				return c;
			}
			var cc = {};
			Object.keys(c).forEach(function(key) {
				if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
					return;
				}
				var r = (typeof c[key] === 'object') ? c[key] : {ideal: c[key]};
				if (r.exact !== undefined && typeof r.exact === 'number') {
					r.min = r.max = r.exact;
				}
				var oldname_ = function(prefix, name) {
					if (prefix) {
						return prefix + name.charAt(0).toUpperCase() + name.slice(1);
					}
					return (name === 'deviceId') ? 'sourceId' : name;
				};
				if (r.ideal !== undefined) {
					cc.optional = cc.optional || [];
					var oc = {};
					if (typeof r.ideal === 'number') {
						oc[oldname_('min', key)] = r.ideal;
						cc.optional.push(oc);
						oc = {};
						oc[oldname_('max', key)] = r.ideal;
						cc.optional.push(oc);
					} else {
						oc[oldname_('', key)] = r.ideal;
						cc.optional.push(oc);
					}
				}
				if (r.exact !== undefined && typeof r.exact !== 'number') {
					cc.mandatory = cc.mandatory || {};
					cc.mandatory[oldname_('', key)] = r.exact;
				} else {
					['min', 'max'].forEach(function(mix) {
						if (r[mix] !== undefined) {
							cc.mandatory = cc.mandatory || {};
							cc.mandatory[oldname_(mix, key)] = r[mix];
						}
					});
				}
			});
			if (c.advanced) {
				cc.optional = (cc.optional || []).concat(c.advanced);
			}
			return cc;
		};

		var shimConstraints_ = function(constraints, func) {
			constraints = JSON.parse(JSON.stringify(constraints));
			if (constraints && constraints.audio) {
				constraints.audio = constraintsToChrome_(constraints.audio);
			}
			if (constraints && typeof constraints.video === 'object') {
				// Shim facingMode for mobile, where it defaults to "user".
				var face = constraints.video.facingMode;
				face = face && ((typeof face === 'object') ? face : {ideal: face});

				if ((face && (face.exact === 'user' || face.exact === 'environment' ||
					face.ideal === 'user' || face.ideal === 'environment')) &&
					!(navigator.mediaDevices.getSupportedConstraints &&
					navigator.mediaDevices.getSupportedConstraints().facingMode)) {
					delete constraints.video.facingMode;
					if (face.exact === 'environment' || face.ideal === 'environment') {
						// Look for "back" in label, or use last cam (typically back cam).
						return navigator.mediaDevices.enumerateDevices()
							.then(function(devices) {
								devices = devices.filter(function(d) {
									return d.kind === 'videoinput';
								});
								var back = devices.find(function(d) {
										return d.label.toLowerCase().indexOf('back') !== -1;
									}) || (devices.length && devices[devices.length - 1]);
								if (back) {
									constraints.video.deviceId = face.exact ? {exact: back.deviceId} :
										{ideal: back.deviceId};
								}
								constraints.video = constraintsToChrome_(constraints.video);
								logging('chrome: ' + JSON.stringify(constraints));
								return func(constraints);
							});
					}
				}
				constraints.video = constraintsToChrome_(constraints.video);
			}
			logging('chrome: ' + JSON.stringify(constraints));
			return func(constraints);
		};

		var shimError_ = function(e) {
			return {
				name: {
					PermissionDeniedError: 'NotAllowedError',
					ConstraintNotSatisfiedError: 'OverconstrainedError'
				}[e.name] || e.name,
				message: e.message,
				constraint: e.constraintName,
				toString: function() {
					return this.name + (this.message && ': ') + this.message;
				}
			};
		};

		var getUserMedia_ = function(constraints, onSuccess, onError) {
			shimConstraints_(constraints, function(c) {
				navigator.webkitGetUserMedia(c, onSuccess, function(e) {
					onError(shimError_(e));
				});
			});
		};

		navigator.getUserMedia = getUserMedia_;

		// Returns the result of getUserMedia as a Promise.
		var getUserMediaPromise_ = function(constraints) {
			return new Promise(function(resolve, reject) {
				navigator.getUserMedia(constraints, resolve, reject);
			});
		};

		if (!navigator.mediaDevices) {
			navigator.mediaDevices = {
				getUserMedia: getUserMediaPromise_,
				enumerateDevices: function() {
					return new Promise(function(resolve) {
						var kinds = {audio: 'audioinput', video: 'videoinput'};
						return MediaStreamTrack.getSources(function(devices) {
							resolve(devices.map(function(device) {
								return {label: device.label,
									kind: kinds[device.kind],
									deviceId: device.id,
									groupId: ''};
							}));
						});
					});
				}
			};
		}

		// A shim for getUserMedia method on the mediaDevices object.
		// TODO(KaptenJansson) remove once implemented in Chrome stable.
		if (!navigator.mediaDevices.getUserMedia) {
			navigator.mediaDevices.getUserMedia = function(constraints) {
				return getUserMediaPromise_(constraints);
			};
		} else {
			// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
			// function which returns a Promise, it does not accept spec-style
			// constraints.
			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
			bind(navigator.mediaDevices);
			navigator.mediaDevices.getUserMedia = function(cs) {
				return shimConstraints_(cs, function(c) {
					return origGetUserMedia(c).then(function(stream) {
						if (c.audio && !stream.getAudioTracks().length ||
							c.video && !stream.getVideoTracks().length) {
							stream.getTracks().forEach(function(track) {
								track.stop();
							});
							throw new DOMException('', 'NotFoundError');
						}
						return stream;
					}, function(e) {
						return Promise.reject(shimError_(e));
					});
				});
			};
		}

		// Dummy devicechange event methods.
		// TODO(KaptenJansson) remove once implemented in Chrome stable.
		if (typeof navigator.mediaDevices.addEventListener === 'undefined') {
			navigator.mediaDevices.addEventListener = function() {
				logging('Dummy mediaDevices.addEventListener called.');
			};
		}
		if (typeof navigator.mediaDevices.removeEventListener === 'undefined') {
			navigator.mediaDevices.removeEventListener = function() {
				logging('Dummy mediaDevices.removeEventListener called.');
			};
		}
	};

},{"../utils.js":98}],93:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var SDPUtils = require('sdp');
	var browserDetails = require('../utils').browserDetails;

	var edgeShim = {
		shimPeerConnection: function() {
			if (window.RTCIceGatherer) {
				// ORTC defines an RTCIceCandidate object but no constructor.
				// Not implemented in Edge.
				if (!window.RTCIceCandidate) {
					window.RTCIceCandidate = function(args) {
						return args;
					};
				}
				// ORTC does not have a session description object but
				// other browsers (i.e. Chrome) that will support both PC and ORTC
				// in the future might have this defined already.
				if (!window.RTCSessionDescription) {
					window.RTCSessionDescription = function(args) {
						return args;
					};
				}
				// this adds an additional event listener to MediaStrackTrack that signals
				// when a tracks enabled property was changed.
				var origMSTEnabled = Object.getOwnPropertyDescriptor(
					MediaStreamTrack.prototype, 'enabled');
				Object.defineProperty(MediaStreamTrack.prototype, 'enabled', {
					set: function(value) {
						origMSTEnabled.set.call(this, value);
						var ev = new Event('enabled');
						ev.enabled = value;
						this.dispatchEvent(ev);
					}
				});
			}

			window.RTCPeerConnection = function(config) {
				var self = this;

				var _eventTarget = document.createDocumentFragment();
				['addEventListener', 'removeEventListener', 'dispatchEvent']
					.forEach(function(method) {
						self[method] = _eventTarget[method].bind(_eventTarget);
					});

				this.onicecandidate = null;
				this.onaddstream = null;
				this.ontrack = null;
				this.onremovestream = null;
				this.onsignalingstatechange = null;
				this.oniceconnectionstatechange = null;
				this.onnegotiationneeded = null;
				this.ondatachannel = null;

				this.localStreams = [];
				this.remoteStreams = [];
				this.getLocalStreams = function() {
					return self.localStreams;
				};
				this.getRemoteStreams = function() {
					return self.remoteStreams;
				};

				this.localDescription = new RTCSessionDescription({
					type: '',
					sdp: ''
				});
				this.remoteDescription = new RTCSessionDescription({
					type: '',
					sdp: ''
				});
				this.signalingState = 'stable';
				this.iceConnectionState = 'new';
				this.iceGatheringState = 'new';

				this.iceOptions = {
					gatherPolicy: 'all',
					iceServers: []
				};
				if (config && config.iceTransportPolicy) {
					switch (config.iceTransportPolicy) {
						case 'all':
						case 'relay':
							this.iceOptions.gatherPolicy = config.iceTransportPolicy;
							break;
						case 'none':
							// FIXME: remove once implementation and spec have added this.
							throw new TypeError('iceTransportPolicy "none" not supported');
						default:
							// don't set iceTransportPolicy.
							break;
					}
				}
				this.usingBundle = config && config.bundlePolicy === 'max-bundle';

				if (config && config.iceServers) {
					// Edge does not like
					// 1) stun:
					// 2) turn: that does not have all of turn:host:port?transport=udp
					// 3) turn: with ipv6 addresses
					var iceServers = JSON.parse(JSON.stringify(config.iceServers));
					this.iceOptions.iceServers = iceServers.filter(function(server) {
						if (server && server.urls) {
							var urls = server.urls;
							if (typeof urls === 'string') {
								urls = [urls];
							}
							urls = urls.filter(function(url) {
								return (url.indexOf('turn:') === 0 &&
									url.indexOf('transport=udp') !== -1 &&
									url.indexOf('turn:[') === -1) ||
									(url.indexOf('stun:') === 0 &&
									browserDetails.version >= 14393);
							})[0];
							return !!urls;
						}
						return false;
					});
				}
				this._config = config;

				// per-track iceGathers, iceTransports, dtlsTransports, rtpSenders, ...
				// everything that is needed to describe a SDP m-line.
				this.transceivers = [];

				// since the iceGatherer is currently created in createOffer but we
				// must not emit candidates until after setLocalDescription we buffer
				// them in this array.
				this._localIceCandidatesBuffer = [];
			};

			window.RTCPeerConnection.prototype._emitBufferedCandidates = function() {
				var self = this;
				var sections = SDPUtils.splitSections(self.localDescription.sdp);
				// FIXME: need to apply ice candidates in a way which is async but
				// in-order
				this._localIceCandidatesBuffer.forEach(function(event) {
					var end = !event.candidate || Object.keys(event.candidate).length === 0;
					if (end) {
						for (var j = 1; j < sections.length; j++) {
							if (sections[j].indexOf('\r\na=end-of-candidates\r\n') === -1) {
								sections[j] += 'a=end-of-candidates\r\n';
							}
						}
					} else if (event.candidate.candidate.indexOf('typ endOfCandidates')
						=== -1) {
						sections[event.candidate.sdpMLineIndex + 1] +=
							'a=' + event.candidate.candidate + '\r\n';
					}
					self.localDescription.sdp = sections.join('');
					self.dispatchEvent(event);
					if (self.onicecandidate !== null) {
						self.onicecandidate(event);
					}
					if (!event.candidate && self.iceGatheringState !== 'complete') {
						var complete = self.transceivers.every(function(transceiver) {
							return transceiver.iceGatherer &&
								transceiver.iceGatherer.state === 'completed';
						});
						if (complete) {
							self.iceGatheringState = 'complete';
						}
					}
				});
				this._localIceCandidatesBuffer = [];
			};

			window.RTCPeerConnection.prototype.getConfiguration = function() {
				return this._config;
			};

			window.RTCPeerConnection.prototype.addStream = function(stream) {
				// Clone is necessary for local demos mostly, attaching directly
				// to two different senders does not work (build 10547).
				var clonedStream = stream.clone();
				stream.getTracks().forEach(function(track, idx) {
					var clonedTrack = clonedStream.getTracks()[idx];
					track.addEventListener('enabled', function(event) {
						clonedTrack.enabled = event.enabled;
					});
				});
				this.localStreams.push(clonedStream);
				this._maybeFireNegotiationNeeded();
			};

			window.RTCPeerConnection.prototype.removeStream = function(stream) {
				var idx = this.localStreams.indexOf(stream);
				if (idx > -1) {
					this.localStreams.splice(idx, 1);
					this._maybeFireNegotiationNeeded();
				}
			};

			window.RTCPeerConnection.prototype.getSenders = function() {
				return this.transceivers.filter(function(transceiver) {
					return !!transceiver.rtpSender;
				})
					.map(function(transceiver) {
						return transceiver.rtpSender;
					});
			};

			window.RTCPeerConnection.prototype.getReceivers = function() {
				return this.transceivers.filter(function(transceiver) {
					return !!transceiver.rtpReceiver;
				})
					.map(function(transceiver) {
						return transceiver.rtpReceiver;
					});
			};

			// Determines the intersection of local and remote capabilities.
			window.RTCPeerConnection.prototype._getCommonCapabilities =
				function(localCapabilities, remoteCapabilities) {
					var commonCapabilities = {
						codecs: [],
						headerExtensions: [],
						fecMechanisms: []
					};
					localCapabilities.codecs.forEach(function(lCodec) {
						for (var i = 0; i < remoteCapabilities.codecs.length; i++) {
							var rCodec = remoteCapabilities.codecs[i];
							if (lCodec.name.toLowerCase() === rCodec.name.toLowerCase() &&
								lCodec.clockRate === rCodec.clockRate) {
								// number of channels is the highest common number of channels
								rCodec.numChannels = Math.min(lCodec.numChannels,
									rCodec.numChannels);
								// push rCodec so we reply with offerer payload type
								commonCapabilities.codecs.push(rCodec);

								// determine common feedback mechanisms
								rCodec.rtcpFeedback = rCodec.rtcpFeedback.filter(function(fb) {
									for (var j = 0; j < lCodec.rtcpFeedback.length; j++) {
										if (lCodec.rtcpFeedback[j].type === fb.type &&
											lCodec.rtcpFeedback[j].parameter === fb.parameter) {
											return true;
										}
									}
									return false;
								});
								// FIXME: also need to determine .parameters
								//  see https://github.com/openpeer/ortc/issues/569
								break;
							}
						}
					});

					localCapabilities.headerExtensions
						.forEach(function(lHeaderExtension) {
							for (var i = 0; i < remoteCapabilities.headerExtensions.length;
								 i++) {
								var rHeaderExtension = remoteCapabilities.headerExtensions[i];
								if (lHeaderExtension.uri === rHeaderExtension.uri) {
									commonCapabilities.headerExtensions.push(rHeaderExtension);
									break;
								}
							}
						});

					// FIXME: fecMechanisms
					return commonCapabilities;
				};

			// Create ICE gatherer, ICE transport and DTLS transport.
			window.RTCPeerConnection.prototype._createIceAndDtlsTransports =
				function(mid, sdpMLineIndex) {
					var self = this;
					var iceGatherer = new RTCIceGatherer(self.iceOptions);
					var iceTransport = new RTCIceTransport(iceGatherer);
					iceGatherer.onlocalcandidate = function(evt) {
						var event = new Event('icecandidate');
						event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

						var cand = evt.candidate;
						var end = !cand || Object.keys(cand).length === 0;
						// Edge emits an empty object for RTCIceCandidateComplete‥
						if (end) {
							// polyfill since RTCIceGatherer.state is not implemented in
							// Edge 10547 yet.
							if (iceGatherer.state === undefined) {
								iceGatherer.state = 'completed';
							}

							// Emit a candidate with type endOfCandidates to make the samples
							// work. Edge requires addIceCandidate with this empty candidate
							// to start checking. The real solution is to signal
							// end-of-candidates to the other side when getting the null
							// candidate but some apps (like the samples) don't do that.
							event.candidate.candidate =
								'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
						} else {
							// RTCIceCandidate doesn't have a component, needs to be added
							cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
							event.candidate.candidate = SDPUtils.writeCandidate(cand);
						}

						// update local description.
						var sections = SDPUtils.splitSections(self.localDescription.sdp);
						if (event.candidate.candidate.indexOf('typ endOfCandidates')
							=== -1) {
							sections[event.candidate.sdpMLineIndex + 1] +=
								'a=' + event.candidate.candidate + '\r\n';
						} else {
							sections[event.candidate.sdpMLineIndex + 1] +=
								'a=end-of-candidates\r\n';
						}
						self.localDescription.sdp = sections.join('');

						var complete = self.transceivers.every(function(transceiver) {
							return transceiver.iceGatherer &&
								transceiver.iceGatherer.state === 'completed';
						});

						// Emit candidate if localDescription is set.
						// Also emits null candidate when all gatherers are complete.
						switch (self.iceGatheringState) {
							case 'new':
								self._localIceCandidatesBuffer.push(event);
								if (end && complete) {
									self._localIceCandidatesBuffer.push(
										new Event('icecandidate'));
								}
								break;
							case 'gathering':
								self._emitBufferedCandidates();
								self.dispatchEvent(event);
								if (self.onicecandidate !== null) {
									self.onicecandidate(event);
								}
								if (complete) {
									self.dispatchEvent(new Event('icecandidate'));
									if (self.onicecandidate !== null) {
										self.onicecandidate(new Event('icecandidate'));
									}
									self.iceGatheringState = 'complete';
								}
								break;
							case 'complete':
								// should not happen... currently!
								break;
							default: // no-op.
								break;
						}
					};
					iceTransport.onicestatechange = function() {
						self._updateConnectionState();
					};

					var dtlsTransport = new RTCDtlsTransport(iceTransport);
					dtlsTransport.ondtlsstatechange = function() {
						self._updateConnectionState();
					};
					dtlsTransport.onerror = function() {
						// onerror does not set state to failed by itself.
						dtlsTransport.state = 'failed';
						self._updateConnectionState();
					};

					return {
						iceGatherer: iceGatherer,
						iceTransport: iceTransport,
						dtlsTransport: dtlsTransport
					};
				};

			// Start the RTP Sender and Receiver for a transceiver.
			window.RTCPeerConnection.prototype._transceive = function(transceiver,
																	  send, recv) {
				var params = this._getCommonCapabilities(transceiver.localCapabilities,
					transceiver.remoteCapabilities);
				if (send && transceiver.rtpSender) {
					params.encodings = transceiver.sendEncodingParameters;
					params.rtcp = {
						cname: SDPUtils.localCName
					};
					if (transceiver.recvEncodingParameters.length) {
						params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
					}
					transceiver.rtpSender.send(params);
				}
				if (recv && transceiver.rtpReceiver) {
					// remove RTX field in Edge 14942
					if (transceiver.kind === 'video'
						&& transceiver.recvEncodingParameters) {
						transceiver.recvEncodingParameters.forEach(function(p) {
							delete p.rtx;
						});
					}
					params.encodings = transceiver.recvEncodingParameters;
					params.rtcp = {
						cname: transceiver.cname
					};
					if (transceiver.sendEncodingParameters.length) {
						params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
					}
					transceiver.rtpReceiver.receive(params);
				}
			};

			window.RTCPeerConnection.prototype.setLocalDescription =
				function(description) {
					var self = this;
					var sections;
					var sessionpart;
					if (description.type === 'offer') {
						// FIXME: What was the purpose of this empty if statement?
						// if (!this._pendingOffer) {
						// } else {
						if (this._pendingOffer) {
							// VERY limited support for SDP munging. Limited to:
							// * changing the order of codecs
							sections = SDPUtils.splitSections(description.sdp);
							sessionpart = sections.shift();
							sections.forEach(function(mediaSection, sdpMLineIndex) {
								var caps = SDPUtils.parseRtpParameters(mediaSection);
								self._pendingOffer[sdpMLineIndex].localCapabilities = caps;
							});
							this.transceivers = this._pendingOffer;
							delete this._pendingOffer;
						}
					} else if (description.type === 'answer') {
						sections = SDPUtils.splitSections(self.remoteDescription.sdp);
						sessionpart = sections.shift();
						var isIceLite = SDPUtils.matchPrefix(sessionpart,
								'a=ice-lite').length > 0;
						sections.forEach(function(mediaSection, sdpMLineIndex) {
							var transceiver = self.transceivers[sdpMLineIndex];
							var iceGatherer = transceiver.iceGatherer;
							var iceTransport = transceiver.iceTransport;
							var dtlsTransport = transceiver.dtlsTransport;
							var localCapabilities = transceiver.localCapabilities;
							var remoteCapabilities = transceiver.remoteCapabilities;

							var rejected = mediaSection.split('\n', 1)[0]
									.split(' ', 2)[1] === '0';

							if (!rejected && !transceiver.isDatachannel) {
								var remoteIceParameters = SDPUtils.getIceParameters(
									mediaSection, sessionpart);
								if (isIceLite) {
									var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
										.map(function(cand) {
											return SDPUtils.parseCandidate(cand);
										})
										.filter(function(cand) {
											return cand.component === '1';
										});
									// ice-lite only includes host candidates in the SDP so we can
									// use setRemoteCandidates (which implies an
									// RTCIceCandidateComplete)
									if (cands.length) {
										iceTransport.setRemoteCandidates(cands);
									}
								}
								var remoteDtlsParameters = SDPUtils.getDtlsParameters(
									mediaSection, sessionpart);
								if (isIceLite) {
									remoteDtlsParameters.role = 'server';
								}

								if (!self.usingBundle || sdpMLineIndex === 0) {
									iceTransport.start(iceGatherer, remoteIceParameters,
										isIceLite ? 'controlling' : 'controlled');
									dtlsTransport.start(remoteDtlsParameters);
								}

								// Calculate intersection of capabilities.
								var params = self._getCommonCapabilities(localCapabilities,
									remoteCapabilities);

								// Start the RTCRtpSender. The RTCRtpReceiver for this
								// transceiver has already been started in setRemoteDescription.
								self._transceive(transceiver,
									params.codecs.length > 0,
									false);
							}
						});
					}

					this.localDescription = {
						type: description.type,
						sdp: description.sdp
					};
					switch (description.type) {
						case 'offer':
							this._updateSignalingState('have-local-offer');
							break;
						case 'answer':
							this._updateSignalingState('stable');
							break;
						default:
							throw new TypeError('unsupported type "' + description.type +
								'"');
					}

					// If a success callback was provided, emit ICE candidates after it
					// has been executed. Otherwise, emit callback after the Promise is
					// resolved.
					var hasCallback = arguments.length > 1 &&
						typeof arguments[1] === 'function';
					if (hasCallback) {
						var cb = arguments[1];
						window.setTimeout(function() {
							cb();
							if (self.iceGatheringState === 'new') {
								self.iceGatheringState = 'gathering';
							}
							self._emitBufferedCandidates();
						}, 0);
					}
					var p = Promise.resolve();
					p.then(function() {
						if (!hasCallback) {
							if (self.iceGatheringState === 'new') {
								self.iceGatheringState = 'gathering';
							}
							// Usually candidates will be emitted earlier.
							window.setTimeout(self._emitBufferedCandidates.bind(self), 500);
						}
					});
					return p;
				};

			window.RTCPeerConnection.prototype.setRemoteDescription =
				function(description) {
					var self = this;
					var stream = new MediaStream();
					var receiverList = [];
					var sections = SDPUtils.splitSections(description.sdp);
					var sessionpart = sections.shift();
					var isIceLite = SDPUtils.matchPrefix(sessionpart,
							'a=ice-lite').length > 0;
					this.usingBundle = SDPUtils.matchPrefix(sessionpart,
							'a=group:BUNDLE ').length > 0;
					sections.forEach(function(mediaSection, sdpMLineIndex) {
						var lines = SDPUtils.splitLines(mediaSection);
						var mline = lines[0].substr(2).split(' ');
						var kind = mline[0];
						var rejected = mline[1] === '0';
						var direction = SDPUtils.getDirection(mediaSection, sessionpart);

						var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:');
						if (mid.length) {
							mid = mid[0].substr(6);
						} else {
							mid = SDPUtils.generateIdentifier();
						}

						// Reject datachannels which are not implemented yet.
						if (kind === 'application' && mline[2] === 'DTLS/SCTP') {
							self.transceivers[sdpMLineIndex] = {
								mid: mid,
								isDatachannel: true
							};
							return;
						}

						var transceiver;
						var iceGatherer;
						var iceTransport;
						var dtlsTransport;
						var rtpSender;
						var rtpReceiver;
						var sendEncodingParameters;
						var recvEncodingParameters;
						var localCapabilities;

						var track;
						// FIXME: ensure the mediaSection has rtcp-mux set.
						var remoteCapabilities = SDPUtils.parseRtpParameters(mediaSection);
						var remoteIceParameters;
						var remoteDtlsParameters;
						if (!rejected) {
							remoteIceParameters = SDPUtils.getIceParameters(mediaSection,
								sessionpart);
							remoteDtlsParameters = SDPUtils.getDtlsParameters(mediaSection,
								sessionpart);
							remoteDtlsParameters.role = 'client';
						}
						recvEncodingParameters =
							SDPUtils.parseRtpEncodingParameters(mediaSection);

						var cname;
						// Gets the first SSRC. Note that with RTX there might be multiple
						// SSRCs.
						var remoteSsrc = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
							.map(function(line) {
								return SDPUtils.parseSsrcMedia(line);
							})
							.filter(function(obj) {
								return obj.attribute === 'cname';
							})[0];
						if (remoteSsrc) {
							cname = remoteSsrc.value;
						}

						var isComplete = SDPUtils.matchPrefix(mediaSection,
								'a=end-of-candidates', sessionpart).length > 0;
						var cands = SDPUtils.matchPrefix(mediaSection, 'a=candidate:')
							.map(function(cand) {
								return SDPUtils.parseCandidate(cand);
							})
							.filter(function(cand) {
								return cand.component === '1';
							});
						if (description.type === 'offer' && !rejected) {
							var transports = self.usingBundle && sdpMLineIndex > 0 ? {
									iceGatherer: self.transceivers[0].iceGatherer,
									iceTransport: self.transceivers[0].iceTransport,
									dtlsTransport: self.transceivers[0].dtlsTransport
								} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);

							if (isComplete) {
								transports.iceTransport.setRemoteCandidates(cands);
							}

							localCapabilities = RTCRtpReceiver.getCapabilities(kind);

							// filter RTX until additional stuff needed for RTX is implemented
							// in adapter.js
							localCapabilities.codecs = localCapabilities.codecs.filter(
								function(codec) {
									return codec.name !== 'rtx';
								});

							sendEncodingParameters = [{
								ssrc: (2 * sdpMLineIndex + 2) * 1001
							}];

							rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);

							track = rtpReceiver.track;
							receiverList.push([track, rtpReceiver]);
							// FIXME: not correct when there are multiple streams but that is
							// not currently supported in this shim.
							stream.addTrack(track);

							// FIXME: look at direction.
							if (self.localStreams.length > 0 &&
								self.localStreams[0].getTracks().length >= sdpMLineIndex) {
								var localTrack;
								if (kind === 'audio') {
									localTrack = self.localStreams[0].getAudioTracks()[0];
								} else if (kind === 'video') {
									localTrack = self.localStreams[0].getVideoTracks()[0];
								}
								if (localTrack) {
									rtpSender = new RTCRtpSender(localTrack,
										transports.dtlsTransport);
								}
							}

							self.transceivers[sdpMLineIndex] = {
								iceGatherer: transports.iceGatherer,
								iceTransport: transports.iceTransport,
								dtlsTransport: transports.dtlsTransport,
								localCapabilities: localCapabilities,
								remoteCapabilities: remoteCapabilities,
								rtpSender: rtpSender,
								rtpReceiver: rtpReceiver,
								kind: kind,
								mid: mid,
								cname: cname,
								sendEncodingParameters: sendEncodingParameters,
								recvEncodingParameters: recvEncodingParameters
							};
							// Start the RTCRtpReceiver now. The RTPSender is started in
							// setLocalDescription.
							self._transceive(self.transceivers[sdpMLineIndex],
								false,
								direction === 'sendrecv' || direction === 'sendonly');
						} else if (description.type === 'answer' && !rejected) {
							transceiver = self.transceivers[sdpMLineIndex];
							iceGatherer = transceiver.iceGatherer;
							iceTransport = transceiver.iceTransport;
							dtlsTransport = transceiver.dtlsTransport;
							rtpSender = transceiver.rtpSender;
							rtpReceiver = transceiver.rtpReceiver;
							sendEncodingParameters = transceiver.sendEncodingParameters;
							localCapabilities = transceiver.localCapabilities;

							self.transceivers[sdpMLineIndex].recvEncodingParameters =
								recvEncodingParameters;
							self.transceivers[sdpMLineIndex].remoteCapabilities =
								remoteCapabilities;
							self.transceivers[sdpMLineIndex].cname = cname;

							if ((isIceLite || isComplete) && cands.length) {
								iceTransport.setRemoteCandidates(cands);
							}
							if (!self.usingBundle || sdpMLineIndex === 0) {
								iceTransport.start(iceGatherer, remoteIceParameters,
									'controlling');
								dtlsTransport.start(remoteDtlsParameters);
							}

							self._transceive(transceiver,
								direction === 'sendrecv' || direction === 'recvonly',
								direction === 'sendrecv' || direction === 'sendonly');

							if (rtpReceiver &&
								(direction === 'sendrecv' || direction === 'sendonly')) {
								track = rtpReceiver.track;
								receiverList.push([track, rtpReceiver]);
								stream.addTrack(track);
							} else {
								// FIXME: actually the receiver should be created later.
								delete transceiver.rtpReceiver;
							}
						}
					});

					this.remoteDescription = {
						type: description.type,
						sdp: description.sdp
					};
					switch (description.type) {
						case 'offer':
							this._updateSignalingState('have-remote-offer');
							break;
						case 'answer':
							this._updateSignalingState('stable');
							break;
						default:
							throw new TypeError('unsupported type "' + description.type +
								'"');
					}
					if (stream.getTracks().length) {
						self.remoteStreams.push(stream);
						window.setTimeout(function() {
							var event = new Event('addstream');
							event.stream = stream;
							self.dispatchEvent(event);
							if (self.onaddstream !== null) {
								window.setTimeout(function() {
									self.onaddstream(event);
								}, 0);
							}

							receiverList.forEach(function(item) {
								var track = item[0];
								var receiver = item[1];
								var trackEvent = new Event('track');
								trackEvent.track = track;
								trackEvent.receiver = receiver;
								trackEvent.streams = [stream];
								self.dispatchEvent(event);
								if (self.ontrack !== null) {
									window.setTimeout(function() {
										self.ontrack(trackEvent);
									}, 0);
								}
							});
						}, 0);
					}
					if (arguments.length > 1 && typeof arguments[1] === 'function') {
						window.setTimeout(arguments[1], 0);
					}
					return Promise.resolve();
				};

			window.RTCPeerConnection.prototype.close = function() {
				this.transceivers.forEach(function(transceiver) {
					/* not yet
					 if (transceiver.iceGatherer) {
					 transceiver.iceGatherer.close();
					 }
					 */
					if (transceiver.iceTransport) {
						transceiver.iceTransport.stop();
					}
					if (transceiver.dtlsTransport) {
						transceiver.dtlsTransport.stop();
					}
					if (transceiver.rtpSender) {
						transceiver.rtpSender.stop();
					}
					if (transceiver.rtpReceiver) {
						transceiver.rtpReceiver.stop();
					}
				});
				// FIXME: clean up tracks, local streams, remote streams, etc
				this._updateSignalingState('closed');
			};

			// Update the signaling state.
			window.RTCPeerConnection.prototype._updateSignalingState =
				function(newState) {
					this.signalingState = newState;
					var event = new Event('signalingstatechange');
					this.dispatchEvent(event);
					if (this.onsignalingstatechange !== null) {
						this.onsignalingstatechange(event);
					}
				};

			// Determine whether to fire the negotiationneeded event.
			window.RTCPeerConnection.prototype._maybeFireNegotiationNeeded =
				function() {
					// Fire away (for now).
					var event = new Event('negotiationneeded');
					this.dispatchEvent(event);
					if (this.onnegotiationneeded !== null) {
						this.onnegotiationneeded(event);
					}
				};

			// Update the connection state.
			window.RTCPeerConnection.prototype._updateConnectionState = function() {
				var self = this;
				var newState;
				var states = {
					'new': 0,
					closed: 0,
					connecting: 0,
					checking: 0,
					connected: 0,
					completed: 0,
					failed: 0
				};
				this.transceivers.forEach(function(transceiver) {
					states[transceiver.iceTransport.state]++;
					states[transceiver.dtlsTransport.state]++;
				});
				// ICETransport.completed and connected are the same for this purpose.
				states.connected += states.completed;

				newState = 'new';
				if (states.failed > 0) {
					newState = 'failed';
				} else if (states.connecting > 0 || states.checking > 0) {
					newState = 'connecting';
				} else if (states.disconnected > 0) {
					newState = 'disconnected';
				} else if (states.new > 0) {
					newState = 'new';
				} else if (states.connected > 0 || states.completed > 0) {
					newState = 'connected';
				}

				if (newState !== self.iceConnectionState) {
					self.iceConnectionState = newState;
					var event = new Event('iceconnectionstatechange');
					this.dispatchEvent(event);
					if (this.oniceconnectionstatechange !== null) {
						this.oniceconnectionstatechange(event);
					}
				}
			};

			window.RTCPeerConnection.prototype.createOffer = function() {
				var self = this;
				if (this._pendingOffer) {
					throw new Error('createOffer called while there is a pending offer.');
				}
				var offerOptions;
				if (arguments.length === 1 && typeof arguments[0] !== 'function') {
					offerOptions = arguments[0];
				} else if (arguments.length === 3) {
					offerOptions = arguments[2];
				}

				var tracks = [];
				var numAudioTracks = 0;
				var numVideoTracks = 0;
				// Default to sendrecv.
				if (this.localStreams.length) {
					numAudioTracks = this.localStreams[0].getAudioTracks().length;
					numVideoTracks = this.localStreams[0].getVideoTracks().length;
				}
				// Determine number of audio and video tracks we need to send/recv.
				if (offerOptions) {
					// Reject Chrome legacy constraints.
					if (offerOptions.mandatory || offerOptions.optional) {
						throw new TypeError(
							'Legacy mandatory/optional constraints not supported.');
					}
					if (offerOptions.offerToReceiveAudio !== undefined) {
						numAudioTracks = offerOptions.offerToReceiveAudio;
					}
					if (offerOptions.offerToReceiveVideo !== undefined) {
						numVideoTracks = offerOptions.offerToReceiveVideo;
					}
				}
				if (this.localStreams.length) {
					// Push local streams.
					this.localStreams[0].getTracks().forEach(function(track) {
						tracks.push({
							kind: track.kind,
							track: track,
							wantReceive: track.kind === 'audio' ?
								numAudioTracks > 0 : numVideoTracks > 0
						});
						if (track.kind === 'audio') {
							numAudioTracks--;
						} else if (track.kind === 'video') {
							numVideoTracks--;
						}
					});
				}
				// Create M-lines for recvonly streams.
				while (numAudioTracks > 0 || numVideoTracks > 0) {
					if (numAudioTracks > 0) {
						tracks.push({
							kind: 'audio',
							wantReceive: true
						});
						numAudioTracks--;
					}
					if (numVideoTracks > 0) {
						tracks.push({
							kind: 'video',
							wantReceive: true
						});
						numVideoTracks--;
					}
				}

				var sdp = SDPUtils.writeSessionBoilerplate();
				var transceivers = [];
				tracks.forEach(function(mline, sdpMLineIndex) {
					// For each track, create an ice gatherer, ice transport,
					// dtls transport, potentially rtpsender and rtpreceiver.
					var track = mline.track;
					var kind = mline.kind;
					var mid = SDPUtils.generateIdentifier();

					var transports = self.usingBundle && sdpMLineIndex > 0 ? {
							iceGatherer: transceivers[0].iceGatherer,
							iceTransport: transceivers[0].iceTransport,
							dtlsTransport: transceivers[0].dtlsTransport
						} : self._createIceAndDtlsTransports(mid, sdpMLineIndex);

					var localCapabilities = RTCRtpSender.getCapabilities(kind);
					// filter RTX until additional stuff needed for RTX is implemented
					// in adapter.js
					localCapabilities.codecs = localCapabilities.codecs.filter(
						function(codec) {
							return codec.name !== 'rtx';
						});
					localCapabilities.codecs.forEach(function(codec) {
						// work around https://bugs.chromium.org/p/webrtc/issues/detail?id=6552
						// by adding level-asymmetry-allowed=1
						if (codec.name === 'H264' &&
							codec.parameters['level-asymmetry-allowed'] === undefined) {
							codec.parameters['level-asymmetry-allowed'] = '1';
						}
					});

					var rtpSender;
					var rtpReceiver;

					// generate an ssrc now, to be used later in rtpSender.send
					var sendEncodingParameters = [{
						ssrc: (2 * sdpMLineIndex + 1) * 1001
					}];
					if (track) {
						rtpSender = new RTCRtpSender(track, transports.dtlsTransport);
					}

					if (mline.wantReceive) {
						rtpReceiver = new RTCRtpReceiver(transports.dtlsTransport, kind);
					}

					transceivers[sdpMLineIndex] = {
						iceGatherer: transports.iceGatherer,
						iceTransport: transports.iceTransport,
						dtlsTransport: transports.dtlsTransport,
						localCapabilities: localCapabilities,
						remoteCapabilities: null,
						rtpSender: rtpSender,
						rtpReceiver: rtpReceiver,
						kind: kind,
						mid: mid,
						sendEncodingParameters: sendEncodingParameters,
						recvEncodingParameters: null
					};
				});
				if (this.usingBundle) {
					sdp += 'a=group:BUNDLE ' + transceivers.map(function(t) {
							return t.mid;
						}).join(' ') + '\r\n';
				}
				tracks.forEach(function(mline, sdpMLineIndex) {
					var transceiver = transceivers[sdpMLineIndex];
					sdp += SDPUtils.writeMediaSection(transceiver,
						transceiver.localCapabilities, 'offer', self.localStreams[0]);
				});

				this._pendingOffer = transceivers;
				var desc = new RTCSessionDescription({
					type: 'offer',
					sdp: sdp
				});
				if (arguments.length && typeof arguments[0] === 'function') {
					window.setTimeout(arguments[0], 0, desc);
				}
				return Promise.resolve(desc);
			};

			window.RTCPeerConnection.prototype.createAnswer = function() {
				var self = this;

				var sdp = SDPUtils.writeSessionBoilerplate();
				if (this.usingBundle) {
					sdp += 'a=group:BUNDLE ' + this.transceivers.map(function(t) {
							return t.mid;
						}).join(' ') + '\r\n';
				}
				this.transceivers.forEach(function(transceiver) {
					if (transceiver.isDatachannel) {
						sdp += 'm=application 0 DTLS/SCTP 5000\r\n' +
							'c=IN IP4 0.0.0.0\r\n' +
							'a=mid:' + transceiver.mid + '\r\n';
						return;
					}
					// Calculate intersection of capabilities.
					var commonCapabilities = self._getCommonCapabilities(
						transceiver.localCapabilities,
						transceiver.remoteCapabilities);

					sdp += SDPUtils.writeMediaSection(transceiver, commonCapabilities,
						'answer', self.localStreams[0]);
				});

				var desc = new RTCSessionDescription({
					type: 'answer',
					sdp: sdp
				});
				if (arguments.length && typeof arguments[0] === 'function') {
					window.setTimeout(arguments[0], 0, desc);
				}
				return Promise.resolve(desc);
			};

			window.RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
				if (!candidate) {
					this.transceivers.forEach(function(transceiver) {
						transceiver.iceTransport.addRemoteCandidate({});
					});
				} else {
					var mLineIndex = candidate.sdpMLineIndex;
					if (candidate.sdpMid) {
						for (var i = 0; i < this.transceivers.length; i++) {
							if (this.transceivers[i].mid === candidate.sdpMid) {
								mLineIndex = i;
								break;
							}
						}
					}
					var transceiver = this.transceivers[mLineIndex];
					if (transceiver) {
						var cand = Object.keys(candidate.candidate).length > 0 ?
							SDPUtils.parseCandidate(candidate.candidate) : {};
						// Ignore Chrome's invalid candidates since Edge does not like them.
						if (cand.protocol === 'tcp' && (cand.port === 0 || cand.port === 9)) {
							return;
						}
						// Ignore RTCP candidates, we assume RTCP-MUX.
						if (cand.component !== '1') {
							return;
						}
						// A dirty hack to make samples work.
						if (cand.type === 'endOfCandidates') {
							cand = {};
						}
						transceiver.iceTransport.addRemoteCandidate(cand);

						// update the remoteDescription.
						var sections = SDPUtils.splitSections(this.remoteDescription.sdp);
						sections[mLineIndex + 1] += (cand.type ? candidate.candidate.trim()
								: 'a=end-of-candidates') + '\r\n';
						this.remoteDescription.sdp = sections.join('');
					}
				}
				if (arguments.length > 1 && typeof arguments[1] === 'function') {
					window.setTimeout(arguments[1], 0);
				}
				return Promise.resolve();
			};

			window.RTCPeerConnection.prototype.getStats = function() {
				var promises = [];
				this.transceivers.forEach(function(transceiver) {
					['rtpSender', 'rtpReceiver', 'iceGatherer', 'iceTransport',
						'dtlsTransport'].forEach(function(method) {
						if (transceiver[method]) {
							promises.push(transceiver[method].getStats());
						}
					});
				});
				var cb = arguments.length > 1 && typeof arguments[1] === 'function' &&
					arguments[1];
				return new Promise(function(resolve) {
					// shim getStats with maplike support
					var results = new Map();
					Promise.all(promises).then(function(res) {
						res.forEach(function(result) {
							Object.keys(result).forEach(function(id) {
								results.set(id, result[id]);
								results[id] = result[id];
							});
						});
						if (cb) {
							window.setTimeout(cb, 0, results);
						}
						resolve(results);
					});
				});
			};
		}
	};

// Expose public methods.
	module.exports = {
		shimPeerConnection: edgeShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia')
	};

},{"../utils":98,"./getusermedia":94,"sdp":62}],94:[function(require,module,exports){
	arguments[4][34][0].apply(exports,arguments)
},{"dup":34}],95:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var browserDetails = require('../utils').browserDetails;

	var firefoxShim = {
		shimOnTrack: function() {
			if (typeof window === 'object' && window.RTCPeerConnection && !('ontrack' in
				window.RTCPeerConnection.prototype)) {
				Object.defineProperty(window.RTCPeerConnection.prototype, 'ontrack', {
					get: function() {
						return this._ontrack;
					},
					set: function(f) {
						if (this._ontrack) {
							this.removeEventListener('track', this._ontrack);
							this.removeEventListener('addstream', this._ontrackpoly);
						}
						this.addEventListener('track', this._ontrack = f);
						this.addEventListener('addstream', this._ontrackpoly = function(e) {
							e.stream.getTracks().forEach(function(track) {
								var event = new Event('track');
								event.track = track;
								event.receiver = {track: track};
								event.streams = [e.stream];
								this.dispatchEvent(event);
							}.bind(this));
						}.bind(this));
					}
				});
			}
		},

		shimSourceObject: function() {
			// Firefox has supported mozSrcObject since FF22, unprefixed in 42.
			if (typeof window === 'object') {
				if (window.HTMLMediaElement &&
					!('srcObject' in window.HTMLMediaElement.prototype)) {
					// Shim the srcObject property, once, when HTMLMediaElement is found.
					Object.defineProperty(window.HTMLMediaElement.prototype, 'srcObject', {
						get: function() {
							return this.mozSrcObject;
						},
						set: function(stream) {
							this.mozSrcObject = stream;
						}
					});
				}
			}
		},

		shimPeerConnection: function() {
			if (typeof window !== 'object' || !(window.RTCPeerConnection ||
				window.mozRTCPeerConnection)) {
				return; // probably media.peerconnection.enabled=false in about:config
			}
			// The RTCPeerConnection object.
			if (!window.RTCPeerConnection) {
				window.RTCPeerConnection = function(pcConfig, pcConstraints) {
					if (browserDetails.version < 38) {
						// .urls is not supported in FF < 38.
						// create RTCIceServers with a single url.
						if (pcConfig && pcConfig.iceServers) {
							var newIceServers = [];
							for (var i = 0; i < pcConfig.iceServers.length; i++) {
								var server = pcConfig.iceServers[i];
								if (server.hasOwnProperty('urls')) {
									for (var j = 0; j < server.urls.length; j++) {
										var newServer = {
											url: server.urls[j]
										};
										if (server.urls[j].indexOf('turn') === 0) {
											newServer.username = server.username;
											newServer.credential = server.credential;
										}
										newIceServers.push(newServer);
									}
								} else {
									newIceServers.push(pcConfig.iceServers[i]);
								}
							}
							pcConfig.iceServers = newIceServers;
						}
					}
					return new mozRTCPeerConnection(pcConfig, pcConstraints);
				};
				window.RTCPeerConnection.prototype = mozRTCPeerConnection.prototype;

				// wrap static methods. Currently just generateCertificate.
				if (mozRTCPeerConnection.generateCertificate) {
					Object.defineProperty(window.RTCPeerConnection, 'generateCertificate', {
						get: function() {
							return mozRTCPeerConnection.generateCertificate;
						}
					});
				}

				window.RTCSessionDescription = mozRTCSessionDescription;
				window.RTCIceCandidate = mozRTCIceCandidate;
			}

			// shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
			['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
				.forEach(function(method) {
					var nativeMethod = RTCPeerConnection.prototype[method];
					RTCPeerConnection.prototype[method] = function() {
						arguments[0] = new ((method === 'addIceCandidate') ?
							RTCIceCandidate : RTCSessionDescription)(arguments[0]);
						return nativeMethod.apply(this, arguments);
					};
				});

			// support for addIceCandidate(null or undefined)
			var nativeAddIceCandidate =
				RTCPeerConnection.prototype.addIceCandidate;
			RTCPeerConnection.prototype.addIceCandidate = function() {
				if (!arguments[0]) {
					if (arguments[1]) {
						arguments[1].apply(null);
					}
					return Promise.resolve();
				}
				return nativeAddIceCandidate.apply(this, arguments);
			};

			if (browserDetails.version < 48) {
				// shim getStats with maplike support
				var makeMapStats = function(stats) {
					var map = new Map();
					Object.keys(stats).forEach(function(key) {
						map.set(key, stats[key]);
						map[key] = stats[key];
					});
					return map;
				};

				var nativeGetStats = RTCPeerConnection.prototype.getStats;
				RTCPeerConnection.prototype.getStats = function(selector, onSucc, onErr) {
					return nativeGetStats.apply(this, [selector || null])
						.then(function(stats) {
							return makeMapStats(stats);
						})
						.then(onSucc, onErr);
				};
			}
		}
	};

// Expose public methods.
	module.exports = {
		shimOnTrack: firefoxShim.shimOnTrack,
		shimSourceObject: firefoxShim.shimSourceObject,
		shimPeerConnection: firefoxShim.shimPeerConnection,
		shimGetUserMedia: require('./getusermedia')
	};

},{"../utils":98,"./getusermedia":96}],96:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var logging = require('../utils').log;
	var browserDetails = require('../utils').browserDetails;

// Expose public methods.
	module.exports = function() {
		var shimError_ = function(e) {
			return {
				name: {
					SecurityError: 'NotAllowedError',
					PermissionDeniedError: 'NotAllowedError'
				}[e.name] || e.name,
				message: {
					'The operation is insecure.': 'The request is not allowed by the ' +
					'user agent or the platform in the current context.'
				}[e.message] || e.message,
				constraint: e.constraint,
				toString: function() {
					return this.name + (this.message && ': ') + this.message;
				}
			};
		};

		// getUserMedia constraints shim.
		var getUserMedia_ = function(constraints, onSuccess, onError) {
			var constraintsToFF37_ = function(c) {
				if (typeof c !== 'object' || c.require) {
					return c;
				}
				var require = [];
				Object.keys(c).forEach(function(key) {
					if (key === 'require' || key === 'advanced' || key === 'mediaSource') {
						return;
					}
					var r = c[key] = (typeof c[key] === 'object') ?
						c[key] : {ideal: c[key]};
					if (r.min !== undefined ||
						r.max !== undefined || r.exact !== undefined) {
						require.push(key);
					}
					if (r.exact !== undefined) {
						if (typeof r.exact === 'number') {
							r. min = r.max = r.exact;
						} else {
							c[key] = r.exact;
						}
						delete r.exact;
					}
					if (r.ideal !== undefined) {
						c.advanced = c.advanced || [];
						var oc = {};
						if (typeof r.ideal === 'number') {
							oc[key] = {min: r.ideal, max: r.ideal};
						} else {
							oc[key] = r.ideal;
						}
						c.advanced.push(oc);
						delete r.ideal;
						if (!Object.keys(r).length) {
							delete c[key];
						}
					}
				});
				if (require.length) {
					c.require = require;
				}
				return c;
			};
			constraints = JSON.parse(JSON.stringify(constraints));
			if (browserDetails.version < 38) {
				logging('spec: ' + JSON.stringify(constraints));
				if (constraints.audio) {
					constraints.audio = constraintsToFF37_(constraints.audio);
				}
				if (constraints.video) {
					constraints.video = constraintsToFF37_(constraints.video);
				}
				logging('ff37: ' + JSON.stringify(constraints));
			}
			return navigator.mozGetUserMedia(constraints, onSuccess, function(e) {
				onError(shimError_(e));
			});
		};

		// Returns the result of getUserMedia as a Promise.
		var getUserMediaPromise_ = function(constraints) {
			return new Promise(function(resolve, reject) {
				getUserMedia_(constraints, resolve, reject);
			});
		};

		// Shim for mediaDevices on older versions.
		if (!navigator.mediaDevices) {
			navigator.mediaDevices = {getUserMedia: getUserMediaPromise_,
				addEventListener: function() { },
				removeEventListener: function() { }
			};
		}
		navigator.mediaDevices.enumerateDevices =
			navigator.mediaDevices.enumerateDevices || function() {
				return new Promise(function(resolve) {
					var infos = [
						{kind: 'audioinput', deviceId: 'default', label: '', groupId: ''},
						{kind: 'videoinput', deviceId: 'default', label: '', groupId: ''}
					];
					resolve(infos);
				});
			};

		if (browserDetails.version < 41) {
			// Work around http://bugzil.la/1169665
			var orgEnumerateDevices =
				navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
			navigator.mediaDevices.enumerateDevices = function() {
				return orgEnumerateDevices().then(undefined, function(e) {
					if (e.name === 'NotFoundError') {
						return [];
					}
					throw e;
				});
			};
		}
		if (browserDetails.version < 49) {
			var origGetUserMedia = navigator.mediaDevices.getUserMedia.
			bind(navigator.mediaDevices);
			navigator.mediaDevices.getUserMedia = function(c) {
				return origGetUserMedia(c).then(function(stream) {
					// Work around https://bugzil.la/802326
					if (c.audio && !stream.getAudioTracks().length ||
						c.video && !stream.getVideoTracks().length) {
						stream.getTracks().forEach(function(track) {
							track.stop();
						});
						throw new DOMException('The object can not be found here.',
							'NotFoundError');
					}
					return stream;
				}, function(e) {
					return Promise.reject(shimError_(e));
				});
			};
		}
		navigator.getUserMedia = function(constraints, onSuccess, onError) {
			if (browserDetails.version < 44) {
				return getUserMedia_(constraints, onSuccess, onError);
			}
			// Replace Firefox 44+'s deprecation warning with unprefixed version.
			console.warn('navigator.getUserMedia has been replaced by ' +
				'navigator.mediaDevices.getUserMedia');
			navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
		};
	};

},{"../utils":98}],97:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	'use strict';
	var safariShim = {
		// TODO: DrAlex, should be here, double check against LayoutTests
		// shimOnTrack: function() { },

		// TODO: once the back-end for the mac port is done, add.
		// TODO: check for webkitGTK+
		// shimPeerConnection: function() { },

		shimGetUserMedia: function() {
			navigator.getUserMedia = navigator.webkitGetUserMedia;
		}
	};

// Expose public methods.
	module.exports = {
		shimGetUserMedia: safariShim.shimGetUserMedia
		// TODO
		// shimOnTrack: safariShim.shimOnTrack,
		// shimPeerConnection: safariShim.shimPeerConnection
	};

},{}],98:[function(require,module,exports){
	/*
	 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
	 *
	 *  Use of this source code is governed by a BSD-style license
	 *  that can be found in the LICENSE file in the root of the source
	 *  tree.
	 */
	/* eslint-env node */
	'use strict';

	var logDisabled_ = true;

// Utility methods.
	var utils = {
		disableLog: function(bool) {
			if (typeof bool !== 'boolean') {
				return new Error('Argument type: ' + typeof bool +
					'. Please use a boolean.');
			}
			logDisabled_ = bool;
			return (bool) ? 'adapter.js logging disabled' :
				'adapter.js logging enabled';
		},

		log: function() {
			if (typeof window === 'object') {
				if (logDisabled_) {
					return;
				}
				if (typeof console !== 'undefined' && typeof console.log === 'function') {
					console.log.apply(console, arguments);
				}
			}
		},

		/**
		 * Extract browser version out of the provided user agent string.
		 *
		 * @param {!string} uastring userAgent string.
		 * @param {!string} expr Regular expression used as match criteria.
		 * @param {!number} pos position in the version string to be returned.
		 * @return {!number} browser version.
		 */
		extractVersion: function(uastring, expr, pos) {
			var match = uastring.match(expr);
			return match && match.length >= pos && parseInt(match[pos], 10);
		},

		/**
		 * Browser detector.
		 *
		 * @return {object} result containing browser and version
		 *     properties.
		 */
		detectBrowser: function() {
			// Returned result object.
			var result = {};
			result.browser = null;
			result.version = null;

			// Fail early if it's not a browser
			if (typeof window === 'undefined' || !window.navigator) {
				result.browser = 'Not a browser.';
				return result;
			}

			// Firefox.
			if (navigator.mozGetUserMedia) {
				result.browser = 'firefox';
				result.version = this.extractVersion(navigator.userAgent,
					/Firefox\/([0-9]+)\./, 1);

				// all webkit-based browsers
			} else if (navigator.webkitGetUserMedia) {
				// Chrome, Chromium, Webview, Opera, all use the chrome shim for now
				if (window.webkitRTCPeerConnection) {
					result.browser = 'chrome';
					result.version = this.extractVersion(navigator.userAgent,
						/Chrom(e|ium)\/([0-9]+)\./, 2);

					// Safari or unknown webkit-based
					// for the time being Safari has support for MediaStreams but not webRTC
				} else {
					// Safari UA substrings of interest for reference:
					// - webkit version:           AppleWebKit/602.1.25 (also used in Op,Cr)
					// - safari UI version:        Version/9.0.3 (unique to Safari)
					// - safari UI webkit version: Safari/601.4.4 (also used in Op,Cr)
					//
					// if the webkit version and safari UI webkit versions are equals,
					// ... this is a stable version.
					//
					// only the internal webkit version is important today to know if
					// media streams are supported
					//
					if (navigator.userAgent.match(/Version\/(\d+).(\d+)/)) {
						result.browser = 'safari';
						result.version = this.extractVersion(navigator.userAgent,
							/AppleWebKit\/([0-9]+)\./, 1);

						// unknown webkit-based browser
					} else {
						result.browser = 'Unsupported webkit-based browser ' +
							'with GUM support but no WebRTC support.';
						return result;
					}
				}

				// Edge.
			} else if (navigator.mediaDevices &&
				navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
				result.browser = 'edge';
				result.version = this.extractVersion(navigator.userAgent,
					/Edge\/(\d+).(\d+)$/, 2);

				// Default fallthrough: not supported.
			} else {
				result.browser = 'Not a supported browser.';
				return result;
			}

			return result;
		}
	};

// Export.
	module.exports = {
		log: utils.log,
		disableLog: utils.disableLog,
		browserDetails: utils.detectBrowser(),
		extractVersion: utils.extractVersion
	};

},{}],99:[function(require,module,exports){
// created by @HenrikJoreteg
	var prefix;
	var version;

	if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
		prefix = 'moz';
		version = navigator.userAgent.match(/Firefox/) && parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
	} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
		prefix = 'webkit';
		version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
	}

	var PC = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
	var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
	var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
	var MediaStream = window.webkitMediaStream || window.MediaStream;
	var screenSharing = window.location.protocol === 'https:' &&
		((prefix === 'webkit' && version >= 26) ||
		(prefix === 'moz' && version >= 33))
	var AudioContext = window.AudioContext || window.webkitAudioContext;
	var videoEl = document.createElement('video');
	var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
	var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;

// export support flags and constructors.prototype && PC
	module.exports = {
		prefix: prefix,
		browserVersion: version,
		support: !!PC && !!getUserMedia,
		// new support style
		supportRTCPeerConnection: !!PC,
		supportVp8: supportVp8,
		supportGetUserMedia: !!getUserMedia,
		supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
		supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
		supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
		supportScreenSharing: screenSharing,
		// constructors
		AudioContext: AudioContext,
		PeerConnection: PC,
		SessionDescription: SessionDescription,
		IceCandidate: IceCandidate,
		MediaStream: MediaStream,
		getUserMedia: getUserMedia
	};

},{}],100:[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);
			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);

},{}],101:[function(require,module,exports){

	/**
	 * Module dependencies.
	 */

	var global = (function() { return this; })();

	/**
	 * WebSocket constructor.
	 */

	var WebSocket = global.WebSocket || global.MozWebSocket;

	/**
	 * Module exports.
	 */

	module.exports = WebSocket ? ws : null;

	/**
	 * WebSocket constructor.
	 *
	 * The third `opts` options object gets ignored in web browsers, since it's
	 * non-standard, and throws a TypeError if passed to the constructor.
	 * See: https://github.com/einaros/ws/issues/227
	 *
	 * @param {String} uri
	 * @param {Array} protocols (optional)
	 * @param {Object) opts (optional)
	 * @api public
	 */

	function ws(uri, protocols, opts) {
		var instance;
		if (protocols) {
			instance = new WebSocket(uri, protocols);
		} else {
			instance = new WebSocket(uri);
		}
		return instance;
	}

	if (WebSocket) ws.prototype = WebSocket.prototype;

},{}],102:[function(require,module,exports){
	var util = require('util');
	var webrtcSupport = require('webrtcsupport');
	var PeerConnection = require('rtcpeerconnection');
	var WildEmitter = require('wildemitter');
	var FileTransfer = require('filetransfer');

// the inband-v1 protocol is sending metadata inband in a serialized JSON object
// followed by the actual data. Receiver closes the datachannel upon completion
	var INBAND_FILETRANSFER_V1 = 'https://simplewebrtc.com/protocol/filetransfer#inband-v1';

	function isAllTracksEnded(stream) {
		var isAllTracksEnded = true;
		stream.getTracks().forEach(function (t) {
			isAllTracksEnded = t.readyState === 'ended' && isAllTracksEnded;
		});
		return isAllTracksEnded;
	}

	function Peer(options) {
		var self = this;

		// call emitter constructor
		WildEmitter.call(this);

		this.id = options.id;
		this.parent = options.parent;
		this.type = options.type || 'video';
		this.oneway = options.oneway || false;
		this.sharemyscreen = options.sharemyscreen || false;
		this.browserPrefix = options.prefix;
		this.stream = options.stream;
		this.enableDataChannels = options.enableDataChannels === undefined ? this.parent.config.enableDataChannels : options.enableDataChannels;
		this.receiveMedia = options.receiveMedia || this.parent.config.receiveMedia;
		this.channels = {};
		this.pendingDCMessages = []; // key (datachannel label) -> value (array[pending messages])
		this.sid = options.sid || Date.now().toString();
		// Create an RTCPeerConnection via the polyfill
		this.pc = new PeerConnection(this.parent.config.peerConnectionConfig, this.parent.config.peerConnectionConstraints);
		this.pc.on('ice', this.onIceCandidate.bind(this));
		this.pc.on('endOfCandidates', function (event) {
			self.send('endOfCandidates', event);
		});
		this.pc.on('offer', function (offer) {
			if (self.parent.config.nick) offer.nick = self.parent.config.nick;
			self.send('offer', offer);
		});
		this.pc.on('answer', function (answer) {
			if (self.parent.config.nick) answer.nick = self.parent.config.nick;
			self.send('answer', answer);
		});
		this.pc.on('addStream', this.handleRemoteStreamAdded.bind(this));
		this.pc.on('addChannel', this.handleDataChannelAdded.bind(this));
		this.pc.on('removeStream', this.handleStreamRemoved.bind(this));
		// Just fire negotiation needed events for now
		// When browser re-negotiation handling seems to work
		// we can use this as the trigger for starting the offer/answer process
		// automatically. We'll just leave it be for now while this stabalizes.
		this.pc.on('negotiationNeeded', this.emit.bind(this, 'negotiationNeeded'));
		this.pc.on('iceConnectionStateChange', this.emit.bind(this, 'iceConnectionStateChange'));
		this.pc.on('iceConnectionStateChange', function () {
			switch (self.pc.iceConnectionState) {
				case 'failed':
					// currently, in chrome only the initiator goes to failed
					// so we need to signal this to the peer
					if (self.pc.pc.peerconnection.localDescription.type === 'offer') {
						self.parent.emit('iceFailed', self);
						self.send('connectivityError');
					}
					break;
			}
		});
		this.pc.on('signalingStateChange', this.emit.bind(this, 'signalingStateChange'));
		this.logger = this.parent.logger;

		// handle screensharing/broadcast mode
		if (options.type === 'screen') {
			if (this.parent.localScreen && this.sharemyscreen) {
				this.logger.log('adding local screen stream to peer connection');
				this.pc.addStream(this.parent.localScreen);
				this.broadcaster = options.broadcaster;
			}
		} else {
			this.parent.localStreams.forEach(function (stream) {
				self.pc.addStream(stream);
			});
		}

		this.on('channelOpen', function (channel) {
			if (channel.protocol === INBAND_FILETRANSFER_V1) {
				channel.onmessage = function (event) {
					var metadata = JSON.parse(event.data);
					var receiver = new FileTransfer.Receiver();
					receiver.receive(metadata, channel);
					self.emit('fileTransfer', metadata, receiver);
					receiver.on('receivedFile', function (file, metadata) {
						receiver.channel.close();
					});
				};
			}
		});

		// proxy events to parent
		this.on('*', function () {
			self.parent.emit.apply(self.parent, arguments);
		});
	}

	util.inherits(Peer, WildEmitter);

	Peer.prototype.handleMessage = function (message) {
		var self = this;

		this.logger.log('getting', message.type, message);

		if (message.prefix) this.browserPrefix = message.prefix;

		if (message.type === 'offer') {
			if (!this.nick) this.nick = message.payload.nick;
			delete message.payload.nick;
			this.pc.handleOffer(message.payload, function (err) {
				if (err) {
					return;
				}
				// auto-accept
				self.pc.answer(function (err, sessionDescription) {
					//self.send('answer', sessionDescription);
				});
			});
		} else if (message.type === 'answer') {
			if (!this.nick) this.nick = message.payload.nick;
			delete message.payload.nick;
			this.pc.handleAnswer(message.payload);
		} else if (message.type === 'candidate') {
			this.pc.processIce(message.payload);
		} else if (message.type === 'connectivityError') {
			this.parent.emit('connectivityError', self);
		} else if (message.type === 'mute') {
			this.parent.emit('mute', {id: message.from, name: message.payload.name});
		} else if (message.type === 'unmute') {
			this.parent.emit('unmute', {id: message.from, name: message.payload.name});
		} else if (message.type === 'endOfCandidates') {
			// Edge requires an end-of-candidates. Since only Edge will have mLines or tracks on the
			// shim this will only be called in Edge.
			var mLines = this.pc.pc.peerconnection.transceivers || [];
			mLines.forEach(function (mLine) {
				if (mLine.iceTransport) {
					mLine.iceTransport.addRemoteCandidate({});
				}
			});
		} else if (message.type === 'unshareScreen') {
			this.parent.emit('unshareScreen', {id: message.from});
			this.end();
		}
	};

// send via signaling channel
	Peer.prototype.send = function (messageType, payload) {
		var message = {
			to: this.id,
			sid: this.sid,
			broadcaster: this.broadcaster,
			roomType: this.type,
			type: messageType,
			payload: payload,
			prefix: webrtcSupport.prefix
		};
		this.logger.log('sending', messageType, message);
		this.parent.emit('message', message);
	};

// send via data channel
// returns true when message was sent and false if channel is not open
	Peer.prototype.sendDirectly = function (channel, messageType, payload) {
		var message = {
			type: messageType,
			payload: payload
		};
		this.logger.log('sending via datachannel', channel, messageType, message);
		var dc = this.getDataChannel(channel);
		if (dc.readyState != 'open') {
			if (!this.pendingDCMessages.hasOwnProperty(channel)) {
				this.pendingDCMessages[channel] = [];
			}
			this.pendingDCMessages[channel].push(message);
			return false;
		}
		dc.send(JSON.stringify(message));
		return true;
	};

// Internal method registering handlers for a data channel and emitting events on the peer
	Peer.prototype._observeDataChannel = function (channel) {
		var self = this;
		channel.onclose = this.emit.bind(this, 'channelClose', channel);
		channel.onerror = this.emit.bind(this, 'channelError', channel);
		channel.onmessage = function (event) {
			self.emit('channelMessage', self, channel.label, JSON.parse(event.data), channel, event);
		};
		channel.onopen = function () {
			self.emit('channelOpen', channel);
			// Check if there are messages that could not be send
			if (self.pendingDCMessages.hasOwnProperty(channel.label)) {
				var pendingMessages = self.pendingDCMessages[channel.label];
				for (var i = 0; i < pendingMessages.length; i++) {
					self.sendDirectly(channel.label, pendingMessages[i].type, pendingMessages[i].payload);
				}
				self.pendingDCMessages[channel.label] = [];
			}
		};
	};

// Fetch or create a data channel by the given name
	Peer.prototype.getDataChannel = function (name, opts) {
		if (!webrtcSupport.supportDataChannel) return this.emit('error', new Error('createDataChannel not supported'));
		var channel = this.channels[name];
		opts || (opts = {});
		if (channel) return channel;
		// if we don't have one by this label, create it
		channel = this.channels[name] = this.pc.createDataChannel(name, opts);
		this._observeDataChannel(channel);
		return channel;
	};

	Peer.prototype.onIceCandidate = function (candidate) {
		if (this.closed) return;
		if (candidate) {
			var pcConfig = this.parent.config.peerConnectionConfig;
			if (webrtcSupport.prefix === 'moz' && pcConfig && pcConfig.iceTransports &&
				candidate.candidate && candidate.candidate.candidate &&
				candidate.candidate.candidate.indexOf(pcConfig.iceTransports) < 0) {
				this.logger.log('Ignoring ice candidate not matching pcConfig iceTransports type: ', pcConfig.iceTransports);
			} else {
				this.send('candidate', candidate);
			}
		} else {
			this.logger.log("End of candidates.");
		}
	};

	Peer.prototype.start = function () {
		var self = this;

		// well, the webrtc api requires that we either
		// a) create a datachannel a priori
		// b) do a renegotiation later to add the SCTP m-line
		// Let's do (a) first...
		if (this.enableDataChannels) {
			this.getDataChannel('simplewebrtc');
		}

		this.pc.offer(this.receiveMedia, function (err, sessionDescription) {
			//self.send('offer', sessionDescription);
		});
	};

	Peer.prototype.icerestart = function () {
		var constraints = this.receiveMedia;
		constraints.iceRestart = true;
		this.pc.offer(constraints, function (err, success) { });
	};

	Peer.prototype.end = function () {
		if (this.closed) return;
		this.pc.close();
		this.handleStreamRemoved();
	};

	Peer.prototype.handleRemoteStreamAdded = function (event) {
		var self = this;
		if (this.stream) {
			this.logger.warn('Already have a remote stream');
		} else {
			this.stream = event.stream;

			this.stream.getTracks().forEach(function (track) {
				track.addEventListener('ended', function () {
					if (isAllTracksEnded(self.stream)) {
						self.end();
					}
				});
			});

			this.parent.emit('peerStreamAdded', this);
		}
	};

	Peer.prototype.handleStreamRemoved = function () {
		var peerIndex = this.parent.peers.indexOf(this);
		if (peerIndex > -1) {
			this.parent.peers.splice(peerIndex, 1);
			this.closed = true;
			this.parent.emit('peerStreamRemoved', this);
		}
	};

	Peer.prototype.handleDataChannelAdded = function (channel) {
		this.channels[channel.label] = channel;
		this._observeDataChannel(channel);
	};

	Peer.prototype.sendFile = function (file) {
		var sender = new FileTransfer.Sender();
		var dc = this.getDataChannel('filetransfer' + (new Date()).getTime(), {
			protocol: INBAND_FILETRANSFER_V1
		});
		// override onopen
		dc.onopen = function () {
			dc.send(JSON.stringify({
				size: file.size,
				name: file.name
			}));
			sender.send(file, dc);
		};
		// override onclose
		dc.onclose = function () {
			console.log('sender received transfer');
			sender.emit('complete');
		};
		return sender;
	};

	module.exports = Peer;

},{"filetransfer":26,"rtcpeerconnection":56,"util":89,"webrtcsupport":99,"wildemitter":100}],103:[function(require,module,exports){
	var WebRTC = require('./webrtc');
	var WildEmitter = require('wildemitter');
	var webrtcSupport = require('webrtcsupport');
	var attachMediaStream = require('attachmediastream');
	var mockconsole = require('mockconsole');
	var SocketIoConnection = require('./socketioconnection');

	function SimpleWebRTC(opts) {
		var self = this;
		var options = opts || {};
		var config = this.config = {
			url: 'https://sandbox.simplewebrtc.com:443/',
			socketio: {/* 'force new connection':true*/},
			connection: null,
			debug: false,
			localVideoEl: '',
			remoteVideosEl: '',
			enableDataChannels: true,
			autoRequestMedia: false,
			autoRemoveVideos: true,
			adjustPeerVolume: false,
			peerVolumeWhenSpeaking: 0.25,
			media: {
				video: true,
				audio: true
			},
			receiveMedia: {
				offerToReceiveAudio: 1,
				offerToReceiveVideo: 1
			},
			localVideo: {
				autoplay: true,
				mirror: true,
				muted: true
			}
		};
		var item, connection;

		// We also allow a 'logger' option. It can be any object that implements
		// log, warn, and error methods.
		// We log nothing by default, following "the rule of silence":
		// http://www.linfo.org/rule_of_silence.html
		this.logger = function () {
			// we assume that if you're in debug mode and you didn't
			// pass in a logger, you actually want to log as much as
			// possible.
			if (opts.debug) {
				return opts.logger || console;
			} else {
				// or we'll use your logger which should have its own logic
				// for output. Or we'll return the no-op.
				return opts.logger || mockconsole;
			}
		}();

		// set our config from options
		for (item in options) {
			if (options.hasOwnProperty(item)) {
				this.config[item] = options[item];
			}
		}

		// attach detected support for convenience
		this.capabilities = webrtcSupport;

		// call WildEmitter constructor
		WildEmitter.call(this);

		// create default SocketIoConnection if it's not passed in
		if (this.config.connection === null) {
			connection = this.connection = new SocketIoConnection(this.config);
		} else {
			connection = this.connection = this.config.connection;
		}

		connection.on('connect', function () {
			console.warn('CONNECTED');
			self.emit('connectionReady', connection.getSessionid());
			self.sessionReady = true;
			self.testReadiness();
		});

		connection.on('message', function (message) {
			var peers = self.webrtc.getPeers(message.from, message.roomType);
			var peer;

			if (message.type === 'offer') {
				if (peers.length) {
					peers.forEach(function (p) {
						if (p.sid == message.sid) peer = p;
					});
					//if (!peer) peer = peers[0]; // fallback for old protocol versions
				}
				if (!peer) {
					peer = self.webrtc.createPeer({
						id: message.from,
						sid: message.sid,
						type: message.roomType,
						enableDataChannels: self.config.enableDataChannels && message.roomType !== 'screen',
						sharemyscreen: message.roomType === 'screen' && !message.broadcaster,
						broadcaster: message.roomType === 'screen' && !message.broadcaster ? self.connection.getSessionid() : null
					});
					self.emit('createdPeer', peer);
				}
				peer.handleMessage(message);
			} else if (peers.length) {
				peers.forEach(function (peer) {
					if (message.sid) {
						if (peer.sid === message.sid) {
							peer.handleMessage(message);
						}
					} else {
						peer.handleMessage(message);
					}
				});
			}
		});

		connection.on('remove', function (room) {
			if (room.id !== self.connection.getSessionid()) {
				self.webrtc.removePeers(room.id, room.type);
			}
		});

		// instantiate our main WebRTC helper
		// using same logger from logic here
		opts.logger = this.logger;
		opts.debug = false;
		this.webrtc = new WebRTC(opts);

		// attach a few methods from underlying lib to simple.
		['mute', 'unmute', 'pauseVideo', 'resumeVideo', 'pause', 'resume', 'sendToAll', 'sendDirectlyToAll', 'getPeers', 'createPeer', 'removePeers'].forEach(function (method) {
			self[method] = self.webrtc[method].bind(self.webrtc);
		});

		// proxy events from WebRTC
		this.webrtc.on('*', function () {
			self.emit.apply(self, arguments);
		});

		// log all events in debug mode
		if (config.debug) {
			this.on('*', this.logger.log.bind(this.logger, 'SimpleWebRTC event:'));
		}

		// check for readiness
		this.webrtc.on('localStream', function () {
			self.testReadiness();
		});

		this.webrtc.on('message', function (payload) {
			self.connection.emit('message', payload);
		});

		this.webrtc.on('peerStreamAdded', this.handlePeerStreamAdded.bind(this));
		this.webrtc.on('peerStreamRemoved', this.handlePeerStreamRemoved.bind(this));

		// echo cancellation attempts
		if (this.config.adjustPeerVolume) {
			this.webrtc.on('speaking', this.setVolumeForAll.bind(this, this.config.peerVolumeWhenSpeaking));
			this.webrtc.on('stoppedSpeaking', this.setVolumeForAll.bind(this, 1));
		}

		connection.on('stunservers', function (args) {
			// appends to the config
			self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
			self.emit('stunservers', args);
		});
		connection.on('turnservers', function (args) {
			// appends to the config
			self.webrtc.config.peerConnectionConfig.iceServers = self.webrtc.config.peerConnectionConfig.iceServers.concat(args);
			self.emit('turnservers', args);
		});

		this.webrtc.on('iceFailed', function (peer) {
			// TODO: local ice failure
			console.error('iceFailed event received');
			var pc = peer.pc;
			console.log('had local relay candidate', pc.hadLocalRelayCandidate);
			console.log('had remote relay candidate', pc.hadRemoteRelayCandidate);
		});
		this.webrtc.on('connectivityError', function (peer) {
			// TODO: remote ice failure
			console.error('connectivityError event received');
			var pc = peer.pc;
			console.log('had local relay candidate', pc.hadLocalRelayCandidate);
			console.log('had remote relay candidate', pc.hadRemoteRelayCandidate);
		});

		// screensharing events
		this.webrtc.on('localScreen', function (stream) {
			var item,
				el = document.createElement('video'),
				container = self.getRemoteVideoContainer();

			el.oncontextmenu = function () { return false; };
			el.id = 'localScreen';
			attachMediaStream(stream, el);
			if (container) {
				container.appendChild(el);
			}

			self.emit('localScreenAdded', el);
			self.connection.emit('shareScreen');
			// NOTE: we don't create screen peers for existing video peers here,
			// this is done by the application code in "webrtc.js".
		});
		this.webrtc.on('localScreenStopped', function (stream) {
			if (self.getLocalScreen()) {
				self.stopScreenShare();
			}
			/*
			 self.connection.emit('unshareScreen');
			 self.webrtc.peers.forEach(function (peer) {
			 if (peer.sharemyscreen) {
			 peer.end();
			 }
			 });
			 */
		});

		this.webrtc.on('channelMessage', function (peer, label, data) {
			if (data.type == 'volume') {
				self.emit('remoteVolumeChange', peer, data.volume);
			}
		});
	}


	SimpleWebRTC.prototype = Object.create(WildEmitter.prototype, {
		constructor: {
			value: SimpleWebRTC
		}
	});

	SimpleWebRTC.prototype.leaveCall = function () {
		if (this.roomName) {
			while (this.webrtc.peers.length) {
				this.webrtc.peers[0].end();
			}
			if (this.getLocalScreen()) {
				this.stopScreenShare();
			}
			this.emit('leftRoom', this.roomName);
			this.stopLocalVideo();
			this.roomName = undefined;
		}
	};

	SimpleWebRTC.prototype.disconnect = function () {
		this.connection.disconnect();
		delete this.connection;
	};

	SimpleWebRTC.prototype.handlePeerStreamAdded = function (peer) {
		var self = this;
		var container = this.getRemoteVideoContainer();
		var video = attachMediaStream(peer.stream);

		// store video element as part of peer for easy removal
		peer.videoEl = video;
		video.id = this.getDomId(peer);

		if (container) container.appendChild(video);

		this.emit('videoAdded', video, peer);

		// send our mute status to new peer if we're muted
		// currently called with a small delay because it arrives before
		// the video element is created otherwise (which happens after
		// the async setRemoteDescription-createAnswer)
		window.setTimeout(function () {
			if (!self.webrtc.isAudioEnabled()) {
				peer.send('mute', {name: 'audio'});
			}
			if (!self.webrtc.isVideoEnabled()) {
				peer.send('mute', {name: 'video'});
			}
		}, 250);
	};

	SimpleWebRTC.prototype.handlePeerStreamRemoved = function (peer) {
		var container = this.getRemoteVideoContainer();
		var videoEl = peer.videoEl;
		if (this.config.autoRemoveVideos && container && videoEl) {
			container.removeChild(videoEl);
		}
		if (videoEl) this.emit('videoRemoved', videoEl, peer);
	};

	SimpleWebRTC.prototype.getDomId = function (peer) {
		return [peer.id, peer.type, peer.broadcaster ? 'broadcasting' : 'incoming'].join('_');
	};

// set volume on video tag for all peers takse a value between 0 and 1
	SimpleWebRTC.prototype.setVolumeForAll = function (volume) {
		this.webrtc.peers.forEach(function (peer) {
			if (peer.videoEl) peer.videoEl.volume = volume;
		});
	};

	SimpleWebRTC.prototype.joinCall = function (name) {
		if (this.config.autoRequestMedia) this.startLocalVideo();
		this.roomName = name;
		this.emit('joinedRoom', name);
	};

	SimpleWebRTC.prototype.getEl = function (idOrEl) {
		if (typeof idOrEl === 'string') {
			return document.getElementById(idOrEl);
		} else {
			return idOrEl;
		}
	};

	SimpleWebRTC.prototype.startLocalVideo = function () {
		var self = this;
		console.log('startLocalVideo');
		this.webrtc.startLocalMedia(this.config.media, function (err, stream) {
			if (err) {
				self.emit('localMediaError', err);
			} else {
				self.emit('localMediaStarted', self.config.media);
				attachMediaStream(stream, self.getLocalVideoContainer(), self.config.localVideo);
			}
		});
	};

	SimpleWebRTC.prototype.stopLocalVideo = function () {
		this.webrtc.stopLocalMedia();
	};

// this accepts either element ID or element
// and either the video tag itself or a container
// that will be used to put the video tag into.
	SimpleWebRTC.prototype.getLocalVideoContainer = function () {
		var el = this.getEl(this.config.localVideoEl);
		if (el && el.tagName === 'VIDEO') {
			el.oncontextmenu = function () { return false; };
			return el;
		} else if (el) {
			var video = document.createElement('video');
			video.oncontextmenu = function () { return false; };
			el.appendChild(video);
			return video;
		} else {
			return;
		}
	};

	SimpleWebRTC.prototype.getRemoteVideoContainer = function () {
		return this.getEl(this.config.remoteVideosEl);
	};

	SimpleWebRTC.prototype.shareScreen = function (mode, cb) {
		this.webrtc.startScreenShare(mode, cb);
	};

	SimpleWebRTC.prototype.getLocalScreen = function () {
		return this.webrtc.localScreen;
	};

	SimpleWebRTC.prototype.stopScreenShare = function () {
		this.connection.emit('unshareScreen');
		var videoEl = document.getElementById('localScreen');
		var container = this.getRemoteVideoContainer();

		if (this.config.autoRemoveVideos && container && videoEl) {
			container.removeChild(videoEl);
		}

		// a hack to emit the event the removes the video
		// element that we want
		if (videoEl) {
			this.emit('videoRemoved', videoEl);
		}
		if (this.getLocalScreen()) {
			this.webrtc.stopScreenShare();
		}
		// Notify peers were sending to.
		this.webrtc.peers.forEach(function (peer) {
			if (peer.type === 'screen' && peer.sharemyscreen) {
				peer.send('unshareScreen');
			}
			if (peer.broadcaster) {
				peer.end();
			}
		});
	};

	SimpleWebRTC.prototype.testReadiness = function () {
		var self = this;
		if (this.sessionReady) {
			if (!this.config.media.video && !this.config.media.audio) {
				self.emit('readyToCall', self.connection.getSessionid());
			} else if (this.webrtc.localStreams.length > 0) {
				self.emit('readyToCall', self.connection.getSessionid());
			}
		}
	};

	SimpleWebRTC.prototype.createRoom = function (name, cb) {
		this.roomName = name;
		if (arguments.length === 2) {
			this.connection.emit('create', name, cb);
		} else {
			this.connection.emit('create', name);
		}
	};

	SimpleWebRTC.prototype.sendFile = function () {
		if (!webrtcSupport.dataChannel) {
			return this.emit('error', new Error('DataChannelNotSupported'));
		}

	};

	module.exports = SimpleWebRTC;

},{"./socketioconnection":104,"./webrtc":105,"attachmediastream":3,"mockconsole":50,"webrtcsupport":99,"wildemitter":100}],104:[function(require,module,exports){
	var io = require('socket.io-client');

	function SocketIoConnection(config) {
		this.connection = io.connect(config.url, config.socketio);
	}

	SocketIoConnection.prototype.on = function (ev, fn) {
		this.connection.on(ev, fn);
	};

	SocketIoConnection.prototype.emit = function () {
		this.connection.emit.apply(this.connection, arguments);
	};

	SocketIoConnection.prototype.getSessionid = function () {
		return this.connection.id;
	};

	SocketIoConnection.prototype.disconnect = function () {
		return this.connection.disconnect();
	};

	module.exports = SocketIoConnection;

},{"socket.io-client":63}],105:[function(require,module,exports){
	var util = require('util');
	var webrtcSupport = require('webrtcsupport');
	var mockconsole = require('mockconsole');
	var localMedia = require('localmedia');
	var Peer = require('./peer');


	function WebRTC(opts) {
		var self = this;
		var options = opts || {};
		var config = this.config = {
			debug: false,
			// makes the entire PC config overridable
			peerConnectionConfig: {
				iceServers: []
			},
			peerConnectionConstraints: {
				optional: []
			},
			receiveMedia: {
				offerToReceiveAudio: 1,
				offerToReceiveVideo: 1
			},
			enableDataChannels: true
		};
		var item;

		// We also allow a 'logger' option. It can be any object that implements
		// log, warn, and error methods.
		// We log nothing by default, following "the rule of silence":
		// http://www.linfo.org/rule_of_silence.html
		this.logger = function () {
			// we assume that if you're in debug mode and you didn't
			// pass in a logger, you actually want to log as much as
			// possible.
			if (opts.debug) {
				return opts.logger || console;
			} else {
				// or we'll use your logger which should have its own logic
				// for output. Or we'll return the no-op.
				return opts.logger || mockconsole;
			}
		}();

		// set options
		for (item in options) {
			if (options.hasOwnProperty(item)) {
				this.config[item] = options[item];
			}
		}

		// check for support
		if (!webrtcSupport.support) {
			this.logger.error('Your browser doesn\'t seem to support WebRTC');
		}

		// where we'll store our peer connections
		this.peers = [];

		// call localMedia constructor
		localMedia.call(this, this.config);

		this.on('speaking', function () {
			if (!self.hardMuted) {
				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
				self.peers.forEach(function (peer) {
					if (peer.enableDataChannels) {
						var dc = peer.getDataChannel('hark');
						if (dc.readyState != 'open') return;
						dc.send(JSON.stringify({type: 'speaking'}));
					}
				});
			}
		});
		this.on('stoppedSpeaking', function () {
			if (!self.hardMuted) {
				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
				self.peers.forEach(function (peer) {
					if (peer.enableDataChannels) {
						var dc = peer.getDataChannel('hark');
						if (dc.readyState != 'open') return;
						dc.send(JSON.stringify({type: 'stoppedSpeaking'}));
					}
				});
			}
		});
		this.on('volumeChange', function (volume, treshold) {
			if (!self.hardMuted) {
				// FIXME: should use sendDirectlyToAll, but currently has different semantics wrt payload
				self.peers.forEach(function (peer) {
					if (peer.enableDataChannels) {
						var dc = peer.getDataChannel('hark');
						if (dc.readyState != 'open') return;
						dc.send(JSON.stringify({type: 'volume', volume: volume }));
					}
				});
			}
		});

		this.on('unshareScreen', function(message) {
			// End peers we were receiving the screensharing stream from.
			var peers = self.getPeers(message.from, 'screen');
			peers.forEach(function(peer) {
				if (!peer.sharemyscreen) {
					peer.end();
				}
			});
		});


		// log events in debug mode
		if (this.config.debug) {
			this.on('*', function (event, val1, val2) {
				var logger;
				// if you didn't pass in a logger and you explicitly turning on debug
				// we're just going to assume you're wanting log output with console
				if (self.config.logger === mockconsole) {
					logger = console;
				} else {
					logger = self.logger;
				}
				logger.log('event:', event, val1, val2);
			});
		}
	}

	util.inherits(WebRTC, localMedia);

	WebRTC.prototype.createPeer = function (opts) {
		var peer;
		opts.parent = this;
		peer = new Peer(opts);
		this.peers.push(peer);
		return peer;
	};

// removes peers
	WebRTC.prototype.removePeers = function (id, type) {
		this.getPeers(id, type).forEach(function (peer) {
			console.warn('Peer ended', id);
			peer.end();
		});
	};

// fetches all Peer objects by session id and/or type
	WebRTC.prototype.getPeers = function (sessionId, type) {
		return this.peers.filter(function (peer) {
			return (!sessionId || peer.id === sessionId) && (!type || peer.type === type);
		});
	};

// sends message to all
	WebRTC.prototype.sendToAll = function (message, payload) {
		this.peers.forEach(function (peer) {
			peer.send(message, payload);
		});
	};

// sends message to all using a datachannel
// only sends to anyone who has an open datachannel
	WebRTC.prototype.sendDirectlyToAll = function (channel, message, payload) {
		this.peers.forEach(function (peer) {
			if (peer.enableDataChannels) {
				peer.sendDirectly(channel, message, payload);
			}
		});
	};

	module.exports = WebRTC;

},{"./peer":102,"localmedia":46,"mockconsole":50,"util":89,"webrtcsupport":99}]},{},[103])(103)
});