EVOLUTION-MANAGER

Edit File: settings.js

/* Licensed under the Apache License, Version 2.0 (the "License") http://www.apache.org/licenses/LICENSE-2.0 */
const WB_AREA_SEL = '.room-block .wb-block';
const WBA_WB_SEL = '.room-block .wb-block .wb-tab-content';
const VIDWIN_SEL = '.video.user-video';
const VID_SEL = '.video-container[id!=user-video]';
const CAM_ACTIVITY = 'VIDEO';
const MIC_ACTIVITY = 'AUDIO';
const SCREEN_ACTIVITY = 'SCREEN';
const REC_ACTIVITY = 'RECORD';
var VideoUtil = (function() {
	const self = {};
	function _getVid(uid) {
		return 'video' + uid;
	}
	function _isSharing(sd) {
		return !!sd && 'SCREEN' === sd.type && sd.activities.includes(SCREEN_ACTIVITY);
	}
	function _isRecording(sd) {
		return !!sd && 'SCREEN' === sd.type && sd.activities.includes(REC_ACTIVITY);
	}
	function _hasMic(sd) {
		return !sd || sd.activities.includes(MIC_ACTIVITY);
	}
	function _hasCam(sd) {
		return !sd || sd.activities.includes(CAM_ACTIVITY);
	}
	function _hasVideo(sd) {
		return _hasCam(sd) || _isSharing(sd) || _isRecording(sd);
	}
	function _getRects(sel, excl) {
		const list = [], elems = $(sel);
		for (let i = 0; i < elems.length; ++i) {
			if (excl !== $(elems[i]).attr('aria-describedby')) {
				list.push(_getRect(elems[i]));
			}
		}
		return list;
	}
	function _getRect(e) {
		const win = $(e), winoff = win.offset();
		return {left: winoff.left
			, top: winoff.top
			, right: winoff.left + win.width()
			, bottom: winoff.top + win.height()};
	}
	function _container() {
		const a = $(WB_AREA_SEL);
		const c = a.find('.wb-area .tabs .wb-tab-content');
		return c.length > 0 ? $(WBA_WB_SEL) : a;
	}
	function __processTopToBottom(area, rectNew, list) {
		const offsetX = 20
			, offsetY = 10;

let minY = area.bottom, posFound;
		do {
			posFound = true;
			for (let i = 0; i < list.length; ++i) {
				const rect = list[i];
				minY = Math.min(minY, rect.bottom);

rectNew.bottom = area.bottom;
		let minY = area.bottom, posFound;
		do {
			posFound = true;
			for (let i = 0; i < list.length; ++i) {
				const rect = list[i];
				minY = Math.min(minY, rect.top);

if (rectNew.left < rect.right && rectNew.right > rect.left && rectNew.top < rect.bottom && rectNew.bottom > rect.top) {
					rectNew.left = rect.right + offsetX;
					posFound = false;
				}
				if (rectNew.right >= area.right) {
					rectNew.left = area.left;
					rectNew.bottom = Math.min(minY, rectNew.top) - offsetY;
					posFound = false;
				}
				if (rectNew.top <= area.top) {
					rectNew.top = area.top;
					posFound = true;
					break;
				}
			}
		} while (!posFound);
		return {left: rectNew.left, top: rectNew.top};
	}
	function _getPos(list, w, h, _processor) {
		if (Room.getOptions().interview) {
			return {left: 0, top: 0};
		}
		const wba = _container()
			, woffset = wba.offset()
			, area = {left: woffset.left, top: woffset.top, right: woffset.left + wba.width(), bottom: woffset.top + wba.height()}
			, rectNew = {
				_left: area.left
				, _top: area.top
				, _right: area.left + w
				, _bottom: area.top + h
				, get left() {
					return this._left;
				}
				, set left(l) {
					this._left = l;
					this._right = l + w;
				}
				, get right() {
					return this._right;
				}
				, get top() {
					return this._top;
				}
				, set top(t) {
					this._top = t;
					this._bottom = t + h;
				}
				, set bottom(b) {
					this._bottom = b;
					this._top = b - h;
				}
				, get bottom() {
					return this._bottom;
				}
			};
		const processor = _processor || __processTopToBottom;
		return processor(area, rectNew, list);
	}
	function _arrange() {
		const list = [];
		$(VIDWIN_SEL).each(function() {
			const v = $(this);
			v.css(_getPos(list, v.width(), v.height()));
			list.push(_getRect(v));
		});
	}
	function _arrangeResize() {
		const list = [];
		function __getDialog(_v) {
			return $(_v).find('.video-container.ui-dialog-content');
		}
		$(VIDWIN_SEL).toArray().sort((v1, v2) => {
			const c1 = __getDialog(v1).data().stream()
				, c2 = __getDialog(v2).data().stream();
			return c2.level - c1.level || c1.user.displayName.localeCompare(c2.user.displayName);
		}).forEach(_v => {
			const v = $(_v);
			__getDialog(v)
				.dialog('option', 'width', 120)
				.dialog('option', 'height', 90);
			v.css(_getPos(list, v.width(), v.height(), __processEqualsBottomToTop));
			list.push(_getRect(v));
		});
	}
	function _cleanStream(stream) {
		if (!!stream) {
			stream.getTracks().forEach(function(track) {
				try {
					track.stop();
				} catch(e) {
					//no-op
				}
			});
		}
	}
	function _cleanPeer(peer) {
		if (!!peer) {
			peer.cleaned = true;
			const pc = peer.peerConnection;
			try {
				if (!!pc && !!pc.getLocalStreams()) {
					pc.getLocalStreams().forEach(function(stream) {
						_cleanStream(stream);
					});
				}
			} catch(e) {
				OmUtil.log('Failed to clean peer' + e);
			}
			try {
				peer.dispose();
			} catch(e) {
				//no-op
			}
			peer = null;
		}
	}
	function _isChrome(_b) {
		const b = _b || kurentoUtils.WebRtcPeer.browser;
		return b.name === 'Chrome' || b.name === 'Chromium';
	}
	function _isEdge(_b) {
		const b = _b || kurentoUtils.WebRtcPeer.browser;
		return b.name === 'Edge';
	}
	function _setPos(v, pos) {
		if (v.dialog('instance')) {
			v.dialog('widget').css(pos);
		}
	}
	function _askPermission(callback) {
		const perm = $('#ask-permission');
		if (undefined === perm.dialog('instance')) {
			perm.data('callbacks', []).dialog({
				appendTo: '.room-block .room-container'
				, autoOpen: true
				, buttons: [
					{
						text: perm.data('btn-ok')
						, click: function() {
							while (perm.data('callbacks').length > 0) {
								perm.data('callbacks').pop()();
							}
							$(this).dialog('close');
						}
					}
				]
			});
		} else if (!perm.dialog('isOpen')) {
			perm.dialog('open')
		}
		perm.data('callbacks').push(callback);
	}
	function _disconnect(node) {
		try {
			node.disconnect(); //this one can throw
		} catch (e) {
			//no-op
		}
	}
	function _sharingSupported() {
		const b = kurentoUtils.WebRtcPeer.browser;
		return (b.name === 'Edge' && b.major > 16)
			|| (b.name === 'Firefox')
			|| (b.name === 'Chrome')
			|| (b.name === 'Chromium');
	}
	function _highlight(el, clazz, count) {
		if (!el || el.length < 1 || el.hasClass('disabled') || count < 0) {
			return;
		}
		el.addClass(clazz).delay(2000).queue(function(next) {
			el.removeClass(clazz).delay(2000).queue(function(next1) {
				_highlight(el, clazz, --count);
				next1();
			});
			next();
		});
	}

self.getVid = _getVid;
	self.isSharing = _isSharing;
	self.isRecording = _isRecording;
	self.hasMic = _hasMic;
	self.hasCam = _hasCam;
	self.hasVideo = _hasVideo;
	self.getRects = _getRects;
	self.getPos = _getPos;
	self.container = _container;
	self.arrange = _arrange;
	self.arrangeResize = _arrangeResize;
	self.cleanStream = _cleanStream;
	self.cleanPeer = _cleanPeer;
	self.addIceServers = function(opts, m) {
		if (m && m.iceServers && m.iceServers.length > 0) {
			opts.configuration = {iceServers: m.iceServers};
		}
		return opts;
	};
	self.isEdge = _isEdge;
	self.isChrome = _isChrome;
	self.setPos = _setPos;
	self.askPermission = _askPermission;
	self.disconnect = _disconnect;
	self.sharingSupported = _sharingSupported;
	self.highlight = _highlight;
	return self;
})();
var Volume = (function() {
	let video, vol, drop, slider, handleEl, hideTimer = null
		, lastVolume = 50, muted = false;

return {
		create: _create
		, handle: _handle
		, mute: _mute
		, muted: function() {
			return muted;
		}
		, destroy: function() {
			if (vol) {
				vol.remove();
				vol = null;
			}
		}
	};
});
/* Licensed under the Apache License, Version 2.0 (the "License") http://www.apache.org/licenses/LICENSE-2.0 */
if (window.hasOwnProperty('isSecureContext') === false) {
	window.isSecureContext = window.location.protocol == 'https:' || ["localhost", "127.0.0.1"].indexOf(window.location.hostname) !== -1;
}
var RingBuffer = (function(length) {
	const buffer = [];
	let pos = 0;

return {
		get: function(key){
			return buffer[key];
		}
		, push: function(item) {
			buffer[pos] = item;
			pos = (pos + 1) % length;
		}
		, min: function(){
			return Math.min.apply(Math, buffer);
		}
	};
});
var MicLevel = (function() {
	let ctx, mic, analyser, vol = .0, vals = RingBuffer(100);

'use strict';

var _adapter_factory = require('./adapter_factory.js');

var adapter = (0, _adapter_factory.adapterFactory)({ window: window });
module.exports = adapter; // this is the difference from adapter_core.

},{"./adapter_factory.js":2}],2:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.adapterFactory = adapterFactory;

var _utils = require('./utils');

var utils = _interopRequireWildcard(_utils);

var _chrome_shim = require('./chrome/chrome_shim');

var chromeShim = _interopRequireWildcard(_chrome_shim);

var _edge_shim = require('./edge/edge_shim');

var edgeShim = _interopRequireWildcard(_edge_shim);

var _firefox_shim = require('./firefox/firefox_shim');

var firefoxShim = _interopRequireWildcard(_firefox_shim);

var _safari_shim = require('./safari/safari_shim');

var safariShim = _interopRequireWildcard(_safari_shim);

var _common_shim = require('./common_shim');

var commonShim = _interopRequireWildcard(_common_shim);

// Shimming starts here.
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
function adapterFactory() {
  var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
      window = _ref.window;

var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
    shimChrome: true,
    shimFirefox: true,
    shimEdge: true,
    shimSafari: true
  };

// Utils.
  var logging = utils.log;
  var browserDetails = utils.detectBrowser(window);

var adapter = {
    browserDetails: browserDetails,
    commonShim: commonShim,
    extractVersion: utils.extractVersion,
    disableLog: utils.disableLog,
    disableWarnings: utils.disableWarnings
  };

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

chromeShim.shimGetUserMedia(window);
      chromeShim.shimMediaStream(window);
      chromeShim.shimPeerConnection(window);
      chromeShim.shimOnTrack(window);
      chromeShim.shimAddTrackRemoveTrack(window);
      chromeShim.shimGetSendersWithDtmf(window);
      chromeShim.shimGetStats(window);
      chromeShim.shimSenderReceiverGetStats(window);
      chromeShim.fixNegotiationNeeded(window);

commonShim.shimRTCIceCandidate(window);
      commonShim.shimConnectionState(window);
      commonShim.shimMaxMessageSize(window);
      commonShim.shimSendThrowTypeError(window);
      commonShim.removeAllowExtmapMixed(window);
      break;
    case 'firefox':
      if (!firefoxShim || !firefoxShim.shimPeerConnection || !options.shimFirefox) {
        logging('Firefox shim is not included in this adapter release.');
        return adapter;
      }
      logging('adapter.js shimming firefox.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = firefoxShim;

firefoxShim.shimGetUserMedia(window);
      firefoxShim.shimPeerConnection(window);
      firefoxShim.shimOnTrack(window);
      firefoxShim.shimRemoveStream(window);
      firefoxShim.shimSenderGetStats(window);
      firefoxShim.shimReceiverGetStats(window);
      firefoxShim.shimRTCDataChannel(window);
      firefoxShim.shimAddTransceiver(window);
      firefoxShim.shimCreateOffer(window);
      firefoxShim.shimCreateAnswer(window);

commonShim.shimRTCIceCandidate(window);
      commonShim.shimConnectionState(window);
      commonShim.shimMaxMessageSize(window);
      commonShim.shimSendThrowTypeError(window);
      break;
    case 'edge':
      if (!edgeShim || !edgeShim.shimPeerConnection || !options.shimEdge) {
        logging('MS edge shim is not included in this adapter release.');
        return adapter;
      }
      logging('adapter.js shimming edge.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = edgeShim;

edgeShim.shimGetUserMedia(window);
      edgeShim.shimGetDisplayMedia(window);
      edgeShim.shimPeerConnection(window);
      edgeShim.shimReplaceTrack(window);

// the edge shim implements the full RTCIceCandidate object.

commonShim.shimMaxMessageSize(window);
      commonShim.shimSendThrowTypeError(window);
      break;
    case 'safari':
      if (!safariShim || !options.shimSafari) {
        logging('Safari shim is not included in this adapter release.');
        return adapter;
      }
      logging('adapter.js shimming safari.');
      // Export to the adapter global object visible in the browser.
      adapter.browserShim = safariShim;

safariShim.shimRTCIceServerUrls(window);
      safariShim.shimCreateOfferLegacy(window);
      safariShim.shimCallbacksAPI(window);
      safariShim.shimLocalStreamsAPI(window);
      safariShim.shimRemoteStreamsAPI(window);
      safariShim.shimTrackEventTransceiver(window);
      safariShim.shimGetUserMedia(window);

commonShim.shimRTCIceCandidate(window);
      commonShim.shimMaxMessageSize(window);
      commonShim.shimSendThrowTypeError(window);
      commonShim.removeAllowExtmapMixed(window);
      break;
    default:
      logging('Unsupported browser!');
      break;
  }

return adapter;
}

// Browser shims.

},{"./chrome/chrome_shim":3,"./common_shim":6,"./edge/edge_shim":7,"./firefox/firefox_shim":11,"./safari/safari_shim":14,"./utils":15}],3:[function(require,module,exports){

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _getusermedia = require('./getusermedia');

Object.defineProperty(exports, 'shimGetUserMedia', {
  enumerable: true,
  get: function get() {
    return _getusermedia.shimGetUserMedia;
  }
});

var _getdisplaymedia = require('./getdisplaymedia');

Object.defineProperty(exports, 'shimGetDisplayMedia', {
  enumerable: true,
  get: function get() {
    return _getdisplaymedia.shimGetDisplayMedia;
  }
});
exports.shimMediaStream = shimMediaStream;
exports.shimOnTrack = shimOnTrack;
exports.shimGetSendersWithDtmf = shimGetSendersWithDtmf;
exports.shimGetStats = shimGetStats;
exports.shimSenderReceiverGetStats = shimSenderReceiverGetStats;
exports.shimAddTrackRemoveTrackWithNative = shimAddTrackRemoveTrackWithNative;
exports.shimAddTrackRemoveTrack = shimAddTrackRemoveTrack;
exports.shimPeerConnection = shimPeerConnection;
exports.fixNegotiationNeeded = fixNegotiationNeeded;

var _utils = require('../utils.js');

var utils = _interopRequireWildcard(_utils);

function shimMediaStream(window) {
  window.MediaStream = window.MediaStream || window.webkitMediaStream;
}

enumerable: true,
      configurable: true
    });
    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
      var _this = this;

if (!this._ontrackpoly) {
        this._ontrackpoly = function (e) {
          // onaddstream does not fire when a track is added to an existing
          // stream. But stream.onaddtrack is implemented so we use that.
          e.stream.addEventListener('addtrack', function (te) {
            var receiver = void 0;
            if (window.RTCPeerConnection.prototype.getReceivers) {
              receiver = _this.getReceivers().find(function (r) {
                return r.track && r.track.id === te.track.id;
              });
            } else {
              receiver = { track: te.track };
            }

// augment addTrack when getSenders is not available.
    if (!window.RTCPeerConnection.prototype.getSenders) {
      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
        this._senders = this._senders || [];
        return this._senders.slice(); // return a copy of the internal state.
      };
      var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
      window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
        var sender = origAddTrack.apply(this, arguments);
        if (!sender) {
          sender = shimSenderWithDtmf(this, track);
          this._senders.push(sender);
        }
        return sender;
      };

this._senders = this._senders || [];
      origAddStream.apply(this, [stream]);
      stream.getTracks().forEach(function (track) {
        _this2._senders.push(shimSenderWithDtmf(_this2, track));
      });
    };

var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
      var _this3 = this;

this._senders = this._senders || [];
      origRemoveStream.apply(this, [stream]);

stream.getTracks().forEach(function (track) {
        var sender = _this3._senders.find(function (s) {
          return s.track === track;
        });
        if (sender) {
          // remove sender
          _this3._senders.splice(_this3._senders.indexOf(sender), 1);
        }
      });
    };
  } else if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && 'getSenders' in window.RTCPeerConnection.prototype && 'createDTMFSender' in window.RTCPeerConnection.prototype && window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
      var _this4 = this;

var senders = origGetSenders.apply(this, []);
      senders.forEach(function (sender) {
        return sender._pc = _this4;
      });
      return senders;
    };

Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
      get: function get() {
        if (this._dtmf === undefined) {
          if (this.track.kind === 'audio') {
            this._dtmf = this._pc.createDTMFSender(this.track);
          } else {
            this._dtmf = null;
          }
        }
        return this._dtmf;
      }
    });
  }
}

function shimGetStats(window) {
  if (!window.RTCPeerConnection) {
    return;
  }

var origGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    var _this5 = this;

var _arguments = Array.prototype.slice.call(arguments),
        selector = _arguments[0],
        onSucc = _arguments[1],
        onErr = _arguments[2];

// If selector is a function then we are in the old style stats so just
    // pass back the original getStats format to avoid breaking old users.

if (arguments.length > 0 && typeof selector === 'function') {
      return origGetStats.apply(this, arguments);
    }

// When spec-style getStats is supported, return those when called with
    // either no arguments or the selector argument is null.
    if (origGetStats.length === 0 && (arguments.length === 0 || typeof selector !== 'function')) {
      return origGetStats.apply(this, []);
    }

return standardReport;
    };

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

if (arguments.length >= 2) {
      var successCallbackWrapper_ = function successCallbackWrapper_(response) {
        onSucc(makeMapStats(fixChromeStats_(response)));
      };

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

// promise-support
    return new Promise(function (resolve, reject) {
      origGetStats.apply(_this5, [function (response) {
        resolve(makeMapStats(fixChromeStats_(response)));
      }, reject]);
    }).then(onSucc, onErr);
  };
}

function shimSenderReceiverGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender && window.RTCRtpReceiver)) {
    return;
  }

// shim sender stats.
  if (!('getStats' in window.RTCRtpSender.prototype)) {
    var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
    if (origGetSenders) {
      window.RTCPeerConnection.prototype.getSenders = function getSenders() {
        var _this6 = this;

var senders = origGetSenders.apply(this, []);
        senders.forEach(function (sender) {
          return sender._pc = _this6;
        });
        return senders;
      };
    }

// shim receiver stats.
  if (!('getStats' in window.RTCRtpReceiver.prototype)) {
    var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
    if (origGetReceivers) {
      window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
        var _this7 = this;

if (!('getStats' in window.RTCRtpSender.prototype && 'getStats' in window.RTCRtpReceiver.prototype)) {
    return;
  }

// shim RTCPeerConnection.getStats(track).
  var origGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    if (arguments.length > 0 && arguments[0] instanceof window.MediaStreamTrack) {
      var track = arguments[0];
      var sender = void 0;
      var receiver = void 0;
      var err = void 0;
      this.getSenders().forEach(function (s) {
        if (s.track === track) {
          if (sender) {
            err = true;
          } else {
            sender = s;
          }
        }
      });
      this.getReceivers().forEach(function (r) {
        if (r.track === track) {
          if (receiver) {
            err = true;
          } else {
            receiver = r;
          }
        }
        return r.track === track;
      });
      if (err || sender && receiver) {
        return Promise.reject(new DOMException('There are more than one sender or receiver for the track.', 'InvalidAccessError'));
      } else if (sender) {
        return sender.getStats();
      } else if (receiver) {
        return receiver.getStats();
      }
      return Promise.reject(new DOMException('There is no sender or receiver for the track.', 'InvalidAccessError'));
    }
    return origGetStats.apply(this, arguments);
  };
}

function shimAddTrackRemoveTrackWithNative(window) {
  // shim addTrack/removeTrack with native variants in order to make
  // the interactions with legacy getLocalStreams behave as in other browsers.
  // Keeps a mapping stream.id => [stream, rtpsenders...]
  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
    var _this8 = this;

this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    return Object.keys(this._shimmedLocalStreams).map(function (streamId) {
      return _this8._shimmedLocalStreams[streamId][0];
    });
  };

var origAddTrack = window.RTCPeerConnection.prototype.addTrack;
  window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
    if (!stream) {
      return origAddTrack.apply(this, arguments);
    }
    this._shimmedLocalStreams = this._shimmedLocalStreams || {};

var sender = origAddTrack.apply(this, arguments);
    if (!this._shimmedLocalStreams[stream.id]) {
      this._shimmedLocalStreams[stream.id] = [stream, sender];
    } else if (this._shimmedLocalStreams[stream.id].indexOf(sender) === -1) {
      this._shimmedLocalStreams[stream.id].push(sender);
    }
    return sender;
  };

var origAddStream = window.RTCPeerConnection.prototype.addStream;
  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
    var _this9 = this;

this._shimmedLocalStreams = this._shimmedLocalStreams || {};

stream.getTracks().forEach(function (track) {
      var alreadyExists = _this9.getSenders().find(function (s) {
        return s.track === track;
      });
      if (alreadyExists) {
        throw new DOMException('Track already exists.', 'InvalidAccessError');
      }
    });
    var existingSenders = this.getSenders();
    origAddStream.apply(this, arguments);
    var newSenders = this.getSenders().filter(function (newSender) {
      return existingSenders.indexOf(newSender) === -1;
    });
    this._shimmedLocalStreams[stream.id] = [stream].concat(newSenders);
  };

var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    delete this._shimmedLocalStreams[stream.id];
    return origRemoveStream.apply(this, arguments);
  };

var origRemoveTrack = window.RTCPeerConnection.prototype.removeTrack;
  window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
    var _this10 = this;

this._shimmedLocalStreams = this._shimmedLocalStreams || {};
    if (sender) {
      Object.keys(this._shimmedLocalStreams).forEach(function (streamId) {
        var idx = _this10._shimmedLocalStreams[streamId].indexOf(sender);
        if (idx !== -1) {
          _this10._shimmedLocalStreams[streamId].splice(idx, 1);
        }
        if (_this10._shimmedLocalStreams[streamId].length === 1) {
          delete _this10._shimmedLocalStreams[streamId];
        }
      });
    }
    return origRemoveTrack.apply(this, arguments);
  };
}

function shimAddTrackRemoveTrack(window) {
  if (!window.RTCPeerConnection) {
    return;
  }
  var browserDetails = utils.detectBrowser(window);
  // shim addTrack and removeTrack.
  if (window.RTCPeerConnection.prototype.addTrack && browserDetails.version >= 65) {
    return shimAddTrackRemoveTrackWithNative(window);
  }

// also shim pc.getLocalStreams when addTrack is shimmed
  // to return the original streams.
  var origGetLocalStreams = window.RTCPeerConnection.prototype.getLocalStreams;
  window.RTCPeerConnection.prototype.getLocalStreams = function getLocalStreams() {
    var _this11 = this;

var nativeStreams = origGetLocalStreams.apply(this);
    this._reverseStreams = this._reverseStreams || {};
    return nativeStreams.map(function (stream) {
      return _this11._reverseStreams[stream.id];
    });
  };

var origAddStream = window.RTCPeerConnection.prototype.addStream;
  window.RTCPeerConnection.prototype.addStream = function addStream(stream) {
    var _this12 = this;

this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};

stream.getTracks().forEach(function (track) {
      var alreadyExists = _this12.getSenders().find(function (s) {
        return s.track === track;
      });
      if (alreadyExists) {
        throw new DOMException('Track already exists.', 'InvalidAccessError');
      }
    });
    // Add identity mapping for consistency with addTrack.
    // Unless this is being used with a stream from addTrack.
    if (!this._reverseStreams[stream.id]) {
      var newStream = new window.MediaStream(stream.getTracks());
      this._streams[stream.id] = newStream;
      this._reverseStreams[newStream.id] = stream;
      stream = newStream;
    }
    origAddStream.apply(this, [stream]);
  };

var origRemoveStream = window.RTCPeerConnection.prototype.removeStream;
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};

origRemoveStream.apply(this, [this._streams[stream.id] || stream]);
    delete this._reverseStreams[this._streams[stream.id] ? this._streams[stream.id].id : stream.id];
    delete this._streams[stream.id];
  };

window.RTCPeerConnection.prototype.addTrack = function addTrack(track, stream) {
    var _this13 = this;

if (this.signalingState === 'closed') {
      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
    }
    var streams = [].slice.call(arguments, 1);
    if (streams.length !== 1 || !streams[0].getTracks().find(function (t) {
      return t === track;
    })) {
      // this is not fully correct but all we can manage without
      // [[associated MediaStreams]] internal slot.
      throw new DOMException('The adapter.js addTrack polyfill only supports a single ' + ' stream which is associated with the specified track.', 'NotSupportedError');
    }

var alreadyExists = this.getSenders().find(function (s) {
      return s.track === track;
    });
    if (alreadyExists) {
      throw new DOMException('Track already exists.', 'InvalidAccessError');
    }

this._streams = this._streams || {};
    this._reverseStreams = this._reverseStreams || {};
    var oldStream = this._streams[stream.id];
    if (oldStream) {
      // this is using odd Chrome behaviour, use with caution:
      // https://bugs.chromium.org/p/webrtc/issues/detail?id=7815
      // Note: we rely on the high-level addTrack/dtmf shim to
      // create the sender with a dtmf sender.
      oldStream.addTrack(track);

// Trigger ONN async.
      Promise.resolve().then(function () {
        _this13.dispatchEvent(new Event('negotiationneeded'));
      });
    } else {
      var newStream = new window.MediaStream([track]);
      this._streams[stream.id] = newStream;
      this._reverseStreams[newStream.id] = stream;
      this.addStream(newStream);
    }
    return this.getSenders().find(function (s) {
      return s.track === track;
    });
  };

// replace the internal stream id with the external one and
  // vice versa.
  function replaceInternalStreamId(pc, description) {
    var sdp = description.sdp;
    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
      var externalStream = pc._reverseStreams[internalId];
      var internalStream = pc._streams[externalStream.id];
      sdp = sdp.replace(new RegExp(internalStream.id, 'g'), externalStream.id);
    });
    return new RTCSessionDescription({
      type: description.type,
      sdp: sdp
    });
  }
  function replaceExternalStreamId(pc, description) {
    var sdp = description.sdp;
    Object.keys(pc._reverseStreams || []).forEach(function (internalId) {
      var externalStream = pc._reverseStreams[internalId];
      var internalStream = pc._streams[externalStream.id];
      sdp = sdp.replace(new RegExp(externalStream.id, 'g'), internalStream.id);
    });
    return new RTCSessionDescription({
      type: description.type,
      sdp: sdp
    });
  }
  ['createOffer', 'createAnswer'].forEach(function (method) {
    var nativeMethod = window.RTCPeerConnection.prototype[method];
    var methodObj = _defineProperty({}, method, function () {
      var _this14 = this;

var origSetLocalDescription = window.RTCPeerConnection.prototype.setLocalDescription;
  window.RTCPeerConnection.prototype.setLocalDescription = function setLocalDescription() {
    if (!arguments.length || !arguments[0].type) {
      return origSetLocalDescription.apply(this, arguments);
    }
    arguments[0] = replaceExternalStreamId(this, arguments[0]);
    return origSetLocalDescription.apply(this, arguments);
  };

// TODO: mangle getStats: https://w3c.github.io/webrtc-stats/#dom-rtcmediastreamstats-streamidentifier

window.RTCPeerConnection.prototype.removeTrack = function removeTrack(sender) {
    var _this15 = this;

if (this.signalingState === 'closed') {
      throw new DOMException('The RTCPeerConnection\'s signalingState is \'closed\'.', 'InvalidStateError');
    }
    // We can not yet check for sender instanceof RTCRtpSender
    // since we shim RTPSender. So we check if sender._pc is set.
    if (!sender._pc) {
      throw new DOMException('Argument 1 of RTCPeerConnection.removeTrack ' + 'does not implement interface RTCRtpSender.', 'TypeError');
    }
    var isLocal = sender._pc === this;
    if (!isLocal) {
      throw new DOMException('Sender was not created by this connection.', 'InvalidAccessError');
    }

// Search for the native stream the senders track belongs to.
    this._streams = this._streams || {};
    var stream = void 0;
    Object.keys(this._streams).forEach(function (streamid) {
      var hasTrack = _this15._streams[streamid].getTracks().find(function (track) {
        return sender.track === track;
      });
      if (hasTrack) {
        stream = _this15._streams[streamid];
      }
    });

if (stream) {
      if (stream.getTracks().length === 1) {
        // if this is the last track of the stream, remove the stream. This
        // takes care of any shimmed _senders.
        this.removeStream(this._reverseStreams[stream.id]);
      } else {
        // relying on the same odd chrome behaviour as above.
        stream.removeTrack(sender.track);
      }
      this.dispatchEvent(new Event('negotiationneeded'));
    }
  };
}

function shimPeerConnection(window) {
  var browserDetails = utils.detectBrowser(window);

if (!window.RTCPeerConnection && window.webkitRTCPeerConnection) {
    // very basic support for old versions.
    window.RTCPeerConnection = window.webkitRTCPeerConnection;
  }
  if (!window.RTCPeerConnection) {
    return;
  }

var addIceCandidateNullSupported = window.RTCPeerConnection.prototype.addIceCandidate.length === 0;

// shim implicit creation of RTCSessionDescription/RTCIceCandidate
  if (browserDetails.version < 53) {
    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
      var nativeMethod = window.RTCPeerConnection.prototype[method];
      var methodObj = _defineProperty({}, method, function () {
        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
        return nativeMethod.apply(this, arguments);
      });
      window.RTCPeerConnection.prototype[method] = methodObj[method];
    });
  }

// support for addIceCandidate(null or undefined)
  var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
  window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
    if (!addIceCandidateNullSupported && !arguments[0]) {
      if (arguments[1]) {
        arguments[1].apply(null);
      }
      return Promise.resolve();
    }
    // Firefox 68+ emits and processes {candidate: "", ...}, ignore
    // in older versions. Native support planned for Chrome M77.
    if (browserDetails.version < 78 && arguments[0] && arguments[0].candidate === '') {
      return Promise.resolve();
    }
    return nativeAddIceCandidate.apply(this, arguments);
  };
}

},{"../utils.js":15,"./getdisplaymedia":4,"./getusermedia":5}],4:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = shimGetDisplayMedia;
function shimGetDisplayMedia(window, getSourceId) {
  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
    return;
  }
  if (!window.navigator.mediaDevices) {
    return;
  }
  // getSourceId is a function that returns a promise resolving with
  // the sourceId of the screen/window/tab to be shared.
  if (typeof getSourceId !== 'function') {
    console.error('shimGetDisplayMedia: getSourceId argument is not ' + 'a function');
    return;
  }
  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
    return getSourceId(constraints).then(function (sourceId) {
      var widthSpecified = constraints.video && constraints.video.width;
      var heightSpecified = constraints.video && constraints.video.height;
      var frameRateSpecified = constraints.video && constraints.video.frameRate;
      constraints.video = {
        mandatory: {
          chromeMediaSource: 'desktop',
          chromeMediaSourceId: sourceId,
          maxFrameRate: frameRateSpecified || 3
        }
      };
      if (widthSpecified) {
        constraints.video.mandatory.maxWidth = widthSpecified;
      }
      if (heightSpecified) {
        constraints.video.mandatory.maxHeight = heightSpecified;
      }
      return window.navigator.mediaDevices.getUserMedia(constraints);
    });
  };
}

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

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.shimGetUserMedia = shimGetUserMedia;

var _utils = require('../utils.js');

var utils = _interopRequireWildcard(_utils);

var logging = utils.log;

function shimGetUserMedia(window) {
  var navigator = window && window.navigator;

if (!navigator.mediaDevices) {
    return;
  }

var browserDetails = utils.detectBrowser(window);

if (face && (face.exact === 'user' || face.exact === 'environment' || face.ideal === 'user' || face.ideal === 'environment') && !(navigator.mediaDevices.getSupportedConstraints && navigator.mediaDevices.getSupportedConstraints().facingMode && !getSupportedFacingModeLies)) {
        delete constraints.video.facingMode;
        var matches = void 0;
        if (face.exact === 'environment' || face.ideal === 'environment') {
          matches = ['back', 'rear'];
        } else if (face.exact === 'user' || face.ideal === 'user') {
          matches = ['front'];
        }
        if (matches) {
          // Look for matches in label, or use last cam for back (typical).
          return navigator.mediaDevices.enumerateDevices().then(function (devices) {
            devices = devices.filter(function (d) {
              return d.kind === 'videoinput';
            });
            var dev = devices.find(function (d) {
              return matches.some(function (match) {
                return d.label.toLowerCase().includes(match);
              });
            });
            if (!dev && devices.length && matches.includes('back')) {
              dev = devices[devices.length - 1]; // more likely the back cam
            }
            if (dev) {
              constraints.video.deviceId = face.exact ? { exact: dev.deviceId } : { ideal: dev.deviceId };
            }
            constraints.video = constraintsToChrome_(constraints.video);
            logging('chrome: ' + JSON.stringify(constraints));
            return func(constraints);
          });
        }
      }
      constraints.video = constraintsToChrome_(constraints.video);
    }
    logging('chrome: ' + JSON.stringify(constraints));
    return func(constraints);
  };

// Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
  // function which returns a Promise, it does not accept spec-style
  // constraints.
  if (navigator.mediaDevices.getUserMedia) {
    var origGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
    navigator.mediaDevices.getUserMedia = function (cs) {
      return shimConstraints_(cs, function (c) {
        return origGetUserMedia(c).then(function (stream) {
          if (c.audio && !stream.getAudioTracks().length || c.video && !stream.getVideoTracks().length) {
            stream.getTracks().forEach(function (track) {
              track.stop();
            });
            throw new DOMException('', 'NotFoundError');
          }
          return stream;
        }, function (e) {
          return Promise.reject(shimError_(e));
        });
      });
    };
  }
}

},{"../utils.js":15}],6:[function(require,module,exports){
/*
 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.shimRTCIceCandidate = shimRTCIceCandidate;
exports.shimMaxMessageSize = shimMaxMessageSize;
exports.shimSendThrowTypeError = shimSendThrowTypeError;
exports.shimConnectionState = shimConnectionState;
exports.removeAllowExtmapMixed = removeAllowExtmapMixed;

var _sdp = require('sdp');

var _sdp2 = _interopRequireDefault(_sdp);

var _utils = require('./utils');

var utils = _interopRequireWildcard(_utils);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function shimRTCIceCandidate(window) {
  // foundation is arbitrarily chosen as an indicator for full support for
  // https://w3c.github.io/webrtc-pc/#rtcicecandidate-interface
  if (!window.RTCIceCandidate || window.RTCIceCandidate && 'foundation' in window.RTCIceCandidate.prototype) {
    return;
  }

var NativeRTCIceCandidate = window.RTCIceCandidate;
  window.RTCIceCandidate = function RTCIceCandidate(args) {
    // Remove the a= which shouldn't be part of the candidate string.
    if ((typeof args === 'undefined' ? 'undefined' : _typeof(args)) === 'object' && args.candidate && args.candidate.indexOf('a=') === 0) {
      args = JSON.parse(JSON.stringify(args));
      args.candidate = args.candidate.substr(2);
    }

if (args.candidate && args.candidate.length) {
      // Augment the native candidate with the parsed fields.
      var nativeCandidate = new NativeRTCIceCandidate(args);
      var parsedCandidate = _sdp2.default.parseCandidate(args.candidate);
      var augmentedCandidate = Object.assign(nativeCandidate, parsedCandidate);

// Add a serializer that does not serialize the extra attributes.
      augmentedCandidate.toJSON = function toJSON() {
        return {
          candidate: augmentedCandidate.candidate,
          sdpMid: augmentedCandidate.sdpMid,
          sdpMLineIndex: augmentedCandidate.sdpMLineIndex,
          usernameFragment: augmentedCandidate.usernameFragment
        };
      };
      return augmentedCandidate;
    }
    return new NativeRTCIceCandidate(args);
  };
  window.RTCIceCandidate.prototype = NativeRTCIceCandidate.prototype;

// Hook up the augmented candidate in onicecandidate and
  // addEventListener('icecandidate', ...)
  utils.wrapPeerConnectionEvent(window, 'icecandidate', function (e) {
    if (e.candidate) {
      Object.defineProperty(e, 'candidate', {
        value: new window.RTCIceCandidate(e.candidate),
        writable: 'false'
      });
    }
    return e;
  });
}

function shimMaxMessageSize(window) {
  if (!window.RTCPeerConnection) {
    return;
  }
  var browserDetails = utils.detectBrowser(window);

if (!('sctp' in window.RTCPeerConnection.prototype)) {
    Object.defineProperty(window.RTCPeerConnection.prototype, 'sctp', {
      get: function get() {
        return typeof this._sctp === 'undefined' ? null : this._sctp;
      }
    });
  }

var getRemoteFirefoxVersion = function getRemoteFirefoxVersion(description) {
    // TODO: Is there a better solution for detecting Firefox?
    var match = description.sdp.match(/mozilla...THIS_IS_SDPARTA-(\d+)/);
    if (match === null || match.length < 2) {
      return -1;
    }
    var version = parseInt(match[1], 10);
    // Test for NaN (yes, this is ugly)
    return version !== version ? -1 : version;
  };

var getMaxMessageSize = function getMaxMessageSize(description, remoteIsFirefox) {
    // Note: 65536 bytes is the default value from the SDP spec. Also,
    //       every implementation we know supports receiving 65536 bytes.
    var maxMessageSize = 65536;

// FF 57 has a slightly incorrect default remote max message size, so
    // we need to adjust it here to avoid a failure when sending.
    // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1425697
    if (browserDetails.browser === 'firefox' && browserDetails.version === 57) {
      maxMessageSize = 65535;
    }

var match = _sdp2.default.matchPrefix(description.sdp, 'a=max-message-size:');
    if (match.length > 0) {
      maxMessageSize = parseInt(match[0].substr(19), 10);
    } else if (browserDetails.browser === 'firefox' && remoteIsFirefox !== -1) {
      // If the maximum message size is not present in the remote SDP and
      // both local and remote are Firefox, the remote peer can receive
      // ~2 GiB.
      maxMessageSize = 2147483637;
    }
    return maxMessageSize;
  };

var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
  window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
    this._sctp = null;
    // Chrome decided to not expose .sctp in plan-b mode.
    // As usual, adapter.js has to do an 'ugly worakaround'
    // to cover up the mess.
    if (browserDetails.browser === 'chrome' && browserDetails.version >= 76) {
      var _getConfiguration = this.getConfiguration(),
          sdpSemantics = _getConfiguration.sdpSemantics;

if (sdpSemantics === 'plan-b') {
        Object.defineProperty(this, 'sctp', {
          get: function get() {
            return typeof this._sctp === 'undefined' ? null : this._sctp;
          },

enumerable: true,
          configurable: true
        });
      }
    }

if (sctpInDescription(arguments[0])) {
      // Check if the remote is FF.
      var isFirefox = getRemoteFirefoxVersion(arguments[0]);

// Get the maximum message size the local peer is capable of sending
      var canSendMMS = getCanSendMaxMessageSize(isFirefox);

// Get the maximum message size of the remote peer.
      var remoteMMS = getMaxMessageSize(arguments[0], isFirefox);

// Determine final maximum message size
      var maxMessageSize = void 0;
      if (canSendMMS === 0 && remoteMMS === 0) {
        maxMessageSize = Number.POSITIVE_INFINITY;
      } else if (canSendMMS === 0 || remoteMMS === 0) {
        maxMessageSize = Math.max(canSendMMS, remoteMMS);
      } else {
        maxMessageSize = Math.min(canSendMMS, remoteMMS);
      }

// Create a dummy RTCSctpTransport object and the 'maxMessageSize'
      // attribute.
      var sctp = {};
      Object.defineProperty(sctp, 'maxMessageSize', {
        get: function get() {
          return maxMessageSize;
        }
      });
      this._sctp = sctp;
    }

return origSetRemoteDescription.apply(this, arguments);
  };
}

function shimSendThrowTypeError(window) {
  if (!(window.RTCPeerConnection && 'createDataChannel' in window.RTCPeerConnection.prototype)) {
    return;
  }

// Note: Although Firefox >= 57 has a native implementation, the maximum
  //       message size can be reset for all data channels at a later stage.
  //       See: https://bugzilla.mozilla.org/show_bug.cgi?id=1426831

/* shims RTCConnectionState by pretending it is the same as iceConnectionState.
 * See https://bugs.chromium.org/p/webrtc/issues/detail?id=6145#c12
 * for why this is a valid hack in Chrome. In Firefox it is slightly incorrect
 * since DTLS failures would be hidden. See
 * https://bugzilla.mozilla.org/show_bug.cgi?id=1265827
 * for the Firefox tracking bug.
 */
function shimConnectionState(window) {
  if (!window.RTCPeerConnection || 'connectionState' in window.RTCPeerConnection.prototype) {
    return;
  }
  var proto = window.RTCPeerConnection.prototype;
  Object.defineProperty(proto, 'connectionState', {
    get: function get() {
      return {
        completed: 'connected',
        checking: 'connecting'
      }[this.iceConnectionState] || this.iceConnectionState;
    },

enumerable: true,
    configurable: true
  });
  Object.defineProperty(proto, 'onconnectionstatechange', {
    get: function get() {
      return this._onconnectionstatechange || null;
    },
    set: function set(cb) {
      if (this._onconnectionstatechange) {
        this.removeEventListener('connectionstatechange', this._onconnectionstatechange);
        delete this._onconnectionstatechange;
      }
      if (cb) {
        this.addEventListener('connectionstatechange', this._onconnectionstatechange = cb);
      }
    },

enumerable: true,
    configurable: true
  });

['setLocalDescription', 'setRemoteDescription'].forEach(function (method) {
    var origMethod = proto[method];
    proto[method] = function () {
      if (!this._connectionstatechangepoly) {
        this._connectionstatechangepoly = function (e) {
          var pc = e.target;
          if (pc._lastConnectionState !== pc.connectionState) {
            pc._lastConnectionState = pc.connectionState;
            var newEvent = new Event('connectionstatechange', e);
            pc.dispatchEvent(newEvent);
          }
          return e;
        };
        this.addEventListener('iceconnectionstatechange', this._connectionstatechangepoly);
      }
      return origMethod.apply(this, arguments);
    };
  });
}

},{"./utils":15,"sdp":17}],7:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;

var _getusermedia = require('./getusermedia');

Object.defineProperty(exports, 'shimGetUserMedia', {
  enumerable: true,
  get: function get() {
    return _getusermedia.shimGetUserMedia;
  }
});

var _getdisplaymedia = require('./getdisplaymedia');

Object.defineProperty(exports, 'shimGetDisplayMedia', {
  enumerable: true,
  get: function get() {
    return _getdisplaymedia.shimGetDisplayMedia;
  }
});
exports.shimPeerConnection = shimPeerConnection;
exports.shimReplaceTrack = shimReplaceTrack;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

var _filtericeservers = require('./filtericeservers');

var _rtcpeerconnectionShim = require('rtcpeerconnection-shim');

var _rtcpeerconnectionShim2 = _interopRequireDefault(_rtcpeerconnectionShim);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function shimPeerConnection(window) {
  var browserDetails = utils.detectBrowser(window);

if (window.RTCIceGatherer) {
    if (!window.RTCIceCandidate) {
      window.RTCIceCandidate = function RTCIceCandidate(args) {
        return args;
      };
    }
    if (!window.RTCSessionDescription) {
      window.RTCSessionDescription = function RTCSessionDescription(args) {
        return args;
      };
    }
    // this adds an additional event listener to MediaStrackTrack that signals
    // when a tracks enabled property was changed. Workaround for a bug in
    // addStream, see below. No longer required in 15025+
    if (browserDetails.version < 15025) {
      var origMSTEnabled = Object.getOwnPropertyDescriptor(window.MediaStreamTrack.prototype, 'enabled');
      Object.defineProperty(window.MediaStreamTrack.prototype, 'enabled', {
        set: function set(value) {
          origMSTEnabled.set.call(this, value);
          var ev = new Event('enabled');
          ev.enabled = value;
          this.dispatchEvent(ev);
        }
      });
    }
  }

// ORTC defines the DTMF sender a bit different.
  // https://github.com/w3c/ortc/issues/714
  if (window.RTCRtpSender && !('dtmf' in window.RTCRtpSender.prototype)) {
    Object.defineProperty(window.RTCRtpSender.prototype, 'dtmf', {
      get: function get() {
        if (this._dtmf === undefined) {
          if (this.track.kind === 'audio') {
            this._dtmf = new window.RTCDtmfSender(this);
          } else if (this.track.kind === 'video') {
            this._dtmf = null;
          }
        }
        return this._dtmf;
      }
    });
  }
  // Edge currently only implements the RTCDtmfSender, not the
  // RTCDTMFSender alias. See http://draft.ortc.org/#rtcdtmfsender2*
  if (window.RTCDtmfSender && !window.RTCDTMFSender) {
    window.RTCDTMFSender = window.RTCDtmfSender;
  }

var RTCPeerConnectionShim = (0, _rtcpeerconnectionShim2.default)(window, browserDetails.version);
  window.RTCPeerConnection = function RTCPeerConnection(config) {
    if (config && config.iceServers) {
      config.iceServers = (0, _filtericeservers.filterIceServers)(config.iceServers, browserDetails.version);
      utils.log('ICE servers after filtering:', config.iceServers);
    }
    return new RTCPeerConnectionShim(config);
  };
  window.RTCPeerConnection.prototype = RTCPeerConnectionShim.prototype;
}

function shimReplaceTrack(window) {
  // ORTC has replaceTrack -- https://github.com/w3c/ortc/issues/614
  if (window.RTCRtpSender && !('replaceTrack' in window.RTCRtpSender.prototype)) {
    window.RTCRtpSender.prototype.replaceTrack = window.RTCRtpSender.prototype.setTrack;
  }
}

},{"../utils":15,"./filtericeservers":8,"./getdisplaymedia":9,"./getusermedia":10,"rtcpeerconnection-shim":16}],8:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.filterIceServers = filterIceServers;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

// Edge does not like
// 1) stun: filtered after 14393 unless ?transport=udp is present
// 2) turn: that does not have all of turn:host:port?transport=udp
// 3) turn: with ipv6 addresses
// 4) turn: occurring muliple times
function filterIceServers(iceServers, edgeVersion) {
  var hasTurn = false;
  iceServers = JSON.parse(JSON.stringify(iceServers));
  return iceServers.filter(function (server) {
    if (server && (server.urls || server.url)) {
      var urls = server.urls || server.url;
      if (server.url && !server.urls) {
        utils.deprecated('RTCIceServer.url', 'RTCIceServer.urls');
      }
      var isString = typeof urls === 'string';
      if (isString) {
        urls = [urls];
      }
      urls = urls.filter(function (url) {
        // filter STUN unconditionally.
        if (url.indexOf('stun:') === 0) {
          return false;
        }

var validTurn = url.startsWith('turn') && !url.startsWith('turn:[') && url.includes('transport=udp');
        if (validTurn && !hasTurn) {
          hasTurn = true;
          return true;
        }
        return validTurn && !hasTurn;
      });

delete server.url;
      server.urls = isString ? urls[0] : urls;
      return !!urls.length;
    }
  });
}

},{"../utils":15}],9:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = shimGetDisplayMedia;
function shimGetDisplayMedia(window) {
  if (!('getDisplayMedia' in window.navigator)) {
    return;
  }
  if (!window.navigator.mediaDevices) {
    return;
  }
  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
    return;
  }
  window.navigator.mediaDevices.getDisplayMedia = window.navigator.getDisplayMedia.bind(window.navigator);
}

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetUserMedia = shimGetUserMedia;
function shimGetUserMedia(window) {
  var navigator = window && window.navigator;

// 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));
    });
  };
}

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = exports.shimGetUserMedia = undefined;

var _getusermedia = require('./getusermedia');

Object.defineProperty(exports, 'shimGetUserMedia', {
  enumerable: true,
  get: function get() {
    return _getusermedia.shimGetUserMedia;
  }
});

var _getdisplaymedia = require('./getdisplaymedia');

Object.defineProperty(exports, 'shimGetDisplayMedia', {
  enumerable: true,
  get: function get() {
    return _getdisplaymedia.shimGetDisplayMedia;
  }
});
exports.shimOnTrack = shimOnTrack;
exports.shimPeerConnection = shimPeerConnection;
exports.shimSenderGetStats = shimSenderGetStats;
exports.shimReceiverGetStats = shimReceiverGetStats;
exports.shimRemoveStream = shimRemoveStream;
exports.shimRTCDataChannel = shimRTCDataChannel;
exports.shimAddTransceiver = shimAddTransceiver;
exports.shimCreateOffer = shimCreateOffer;
exports.shimCreateAnswer = shimCreateAnswer;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

function shimOnTrack(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
      get: function get() {
        return { receiver: this.receiver };
      }
    });
  }
}

function shimPeerConnection(window) {
  var browserDetails = utils.detectBrowser(window);

if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !(window.RTCPeerConnection || window.mozRTCPeerConnection)) {
    return; // probably media.peerconnection.enabled=false in about:config
  }
  if (!window.RTCPeerConnection && window.mozRTCPeerConnection) {
    // very basic support for old versions.
    window.RTCPeerConnection = window.mozRTCPeerConnection;
  }

if (browserDetails.version < 53) {
    // shim away need for obsolete RTCIceCandidate/RTCSessionDescription.
    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'].forEach(function (method) {
      var nativeMethod = window.RTCPeerConnection.prototype[method];
      var methodObj = _defineProperty({}, method, function () {
        arguments[0] = new (method === 'addIceCandidate' ? window.RTCIceCandidate : window.RTCSessionDescription)(arguments[0]);
        return nativeMethod.apply(this, arguments);
      });
      window.RTCPeerConnection.prototype[method] = methodObj[method];
    });
  }

// support for addIceCandidate(null or undefined)
  // as well as ignoring {sdpMid, candidate: ""}
  if (browserDetails.version < 68) {
    var nativeAddIceCandidate = window.RTCPeerConnection.prototype.addIceCandidate;
    window.RTCPeerConnection.prototype.addIceCandidate = function addIceCandidate() {
      if (!arguments[0]) {
        if (arguments[1]) {
          arguments[1].apply(null);
        }
        return Promise.resolve();
      }
      // Firefox 68+ emits and processes {candidate: "", ...}, ignore
      // in older versions.
      if (arguments[0] && arguments[0].candidate === '') {
        return Promise.resolve();
      }
      return nativeAddIceCandidate.apply(this, arguments);
    };
  }

var modernStatsTypes = {
    inboundrtp: 'inbound-rtp',
    outboundrtp: 'outbound-rtp',
    candidatepair: 'candidate-pair',
    localcandidate: 'local-candidate',
    remotecandidate: 'remote-candidate'
  };

var nativeGetStats = window.RTCPeerConnection.prototype.getStats;
  window.RTCPeerConnection.prototype.getStats = function getStats() {
    var _arguments = Array.prototype.slice.call(arguments),
        selector = _arguments[0],
        onSucc = _arguments[1],
        onErr = _arguments[2];

return nativeGetStats.apply(this, [selector || null]).then(function (stats) {
      if (browserDetails.version < 53 && !onSucc) {
        // Shim only promise getStats with spec-hyphens in type names
        // Leave callback version alone; misc old uses of forEach before Map
        try {
          stats.forEach(function (stat) {
            stat.type = modernStatsTypes[stat.type] || stat.type;
          });
        } catch (e) {
          if (e.name !== 'TypeError') {
            throw e;
          }
          // Avoid TypeError: "type" is read-only, in old versions. 34-43ish
          stats.forEach(function (stat, i) {
            stats.set(i, Object.assign({}, stat, {
              type: modernStatsTypes[stat.type] || stat.type
            }));
          });
        }
      }
      return stats;
    }).then(onSucc, onErr);
  };
}

function shimSenderGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
    return;
  }
  if (window.RTCRtpSender && 'getStats' in window.RTCRtpSender.prototype) {
    return;
  }
  var origGetSenders = window.RTCPeerConnection.prototype.getSenders;
  if (origGetSenders) {
    window.RTCPeerConnection.prototype.getSenders = function getSenders() {
      var _this = this;

var senders = origGetSenders.apply(this, []);
      senders.forEach(function (sender) {
        return sender._pc = _this;
      });
      return senders;
    };
  }

function shimReceiverGetStats(window) {
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection && window.RTCRtpSender)) {
    return;
  }
  if (window.RTCRtpSender && 'getStats' in window.RTCRtpReceiver.prototype) {
    return;
  }
  var origGetReceivers = window.RTCPeerConnection.prototype.getReceivers;
  if (origGetReceivers) {
    window.RTCPeerConnection.prototype.getReceivers = function getReceivers() {
      var _this2 = this;

function shimRemoveStream(window) {
  if (!window.RTCPeerConnection || 'removeStream' in window.RTCPeerConnection.prototype) {
    return;
  }
  window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
    var _this3 = this;

utils.deprecated('removeStream', 'removeTrack');
    this.getSenders().forEach(function (sender) {
      if (sender.track && stream.getTracks().includes(sender.track)) {
        _this3.removeTrack(sender);
      }
    });
  };
}

function shimRTCDataChannel(window) {
  // rename DataChannel to RTCDataChannel (native fix in FF60):
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1173851
  if (window.DataChannel && !window.RTCDataChannel) {
    window.RTCDataChannel = window.DataChannel;
  }
}

var params = sender.getParameters();
        if (!('encodings' in params)) {
          params.encodings = initParameters.sendEncodings;
          this.setParametersPromises.push(sender.setParameters(params).catch(function () {}));
        }
      }
      return transceiver;
    };
  }
}

function shimCreateOffer(window) {
  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
  // Firefox ignores the init sendEncodings options passed to addTransceiver
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
    return;
  }
  var origCreateOffer = window.RTCPeerConnection.prototype.createOffer;
  window.RTCPeerConnection.prototype.createOffer = function createOffer() {
    var _this4 = this,
        _arguments2 = arguments;

if (this.setParametersPromises && this.setParametersPromises.length) {
      return Promise.all(this.setParametersPromises).then(function () {
        return origCreateOffer.apply(_this4, _arguments2);
      }).finally(function () {
        _this4.setParametersPromises = [];
      });
    }
    return origCreateOffer.apply(this, arguments);
  };
}

function shimCreateAnswer(window) {
  // https://github.com/webrtcHacks/adapter/issues/998#issuecomment-516921647
  // Firefox ignores the init sendEncodings options passed to addTransceiver
  // https://bugzilla.mozilla.org/show_bug.cgi?id=1396918
  if (!((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCPeerConnection)) {
    return;
  }
  var origCreateAnswer = window.RTCPeerConnection.prototype.createAnswer;
  window.RTCPeerConnection.prototype.createAnswer = function createAnswer() {
    var _this5 = this,
        _arguments3 = arguments;

if (this.setParametersPromises && this.setParametersPromises.length) {
      return Promise.all(this.setParametersPromises).then(function () {
        return origCreateAnswer.apply(_this5, _arguments3);
      }).finally(function () {
        _this5.setParametersPromises = [];
      });
    }
    return origCreateAnswer.apply(this, arguments);
  };
}

},{"../utils":15,"./getdisplaymedia":12,"./getusermedia":13}],12:[function(require,module,exports){
/*
 *  Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shimGetDisplayMedia = shimGetDisplayMedia;
function shimGetDisplayMedia(window, preferredMediaSource) {
  if (window.navigator.mediaDevices && 'getDisplayMedia' in window.navigator.mediaDevices) {
    return;
  }
  if (!window.navigator.mediaDevices) {
    return;
  }
  window.navigator.mediaDevices.getDisplayMedia = function getDisplayMedia(constraints) {
    if (!(constraints && constraints.video)) {
      var err = new DOMException('getDisplayMedia without video ' + 'constraints is undefined');
      err.name = 'NotFoundError';
      // from https://heycam.github.io/webidl/#idl-DOMException-error-names
      err.code = 8;
      return Promise.reject(err);
    }
    if (constraints.video === true) {
      constraints.video = { mediaSource: preferredMediaSource };
    } else {
      constraints.video.mediaSource = preferredMediaSource;
    }
    return window.navigator.mediaDevices.getUserMedia(constraints);
  };
}

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

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.shimGetUserMedia = shimGetUserMedia;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

function shimGetUserMedia(window) {
  var browserDetails = utils.detectBrowser(window);
  var navigator = window && window.navigator;
  var MediaStreamTrack = window && window.MediaStreamTrack;

navigator.getUserMedia = function (constraints, onSuccess, onError) {
    // Replace Firefox 44+'s deprecation warning with unprefixed version.
    utils.deprecated('navigator.getUserMedia', 'navigator.mediaDevices.getUserMedia');
    navigator.mediaDevices.getUserMedia(constraints).then(onSuccess, onError);
  };

if (!(browserDetails.version > 55 && 'autoGainControl' in navigator.mediaDevices.getSupportedConstraints())) {
    var remap = function remap(obj, a, b) {
      if (a in obj && !(b in obj)) {
        obj[b] = obj[a];
        delete obj[a];
      }
    };

var nativeGetUserMedia = navigator.mediaDevices.getUserMedia.bind(navigator.mediaDevices);
    navigator.mediaDevices.getUserMedia = function (c) {
      if ((typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object' && _typeof(c.audio) === 'object') {
        c = JSON.parse(JSON.stringify(c));
        remap(c.audio, 'autoGainControl', 'mozAutoGainControl');
        remap(c.audio, 'noiseSuppression', 'mozNoiseSuppression');
      }
      return nativeGetUserMedia(c);
    };

if (MediaStreamTrack && MediaStreamTrack.prototype.getSettings) {
      var nativeGetSettings = MediaStreamTrack.prototype.getSettings;
      MediaStreamTrack.prototype.getSettings = function () {
        var obj = nativeGetSettings.apply(this, arguments);
        remap(obj, 'mozAutoGainControl', 'autoGainControl');
        remap(obj, 'mozNoiseSuppression', 'noiseSuppression');
        return obj;
      };
    }

if (MediaStreamTrack && MediaStreamTrack.prototype.applyConstraints) {
      var nativeApplyConstraints = MediaStreamTrack.prototype.applyConstraints;
      MediaStreamTrack.prototype.applyConstraints = function (c) {
        if (this.kind === 'audio' && (typeof c === 'undefined' ? 'undefined' : _typeof(c)) === 'object') {
          c = JSON.parse(JSON.stringify(c));
          remap(c, 'autoGainControl', 'mozAutoGainControl');
          remap(c, 'noiseSuppression', 'mozNoiseSuppression');
        }
        return nativeApplyConstraints.apply(this, [c]);
      };
    }
  }
}

},{"../utils":15}],14:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.shimLocalStreamsAPI = shimLocalStreamsAPI;
exports.shimRemoteStreamsAPI = shimRemoteStreamsAPI;
exports.shimCallbacksAPI = shimCallbacksAPI;
exports.shimGetUserMedia = shimGetUserMedia;
exports.shimConstraints = shimConstraints;
exports.shimRTCIceServerUrls = shimRTCIceServerUrls;
exports.shimTrackEventTransceiver = shimTrackEventTransceiver;
exports.shimCreateOfferLegacy = shimCreateOfferLegacy;

var _utils = require('../utils');

var utils = _interopRequireWildcard(_utils);

if (!this._localStreams) {
        this._localStreams = [];
      }
      if (!this._localStreams.includes(stream)) {
        this._localStreams.push(stream);
      }
      // Try to emulate Chrome's behaviour of adding in audio-video order.
      // Safari orders by track id.
      stream.getAudioTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
      stream.getVideoTracks().forEach(function (track) {
        return _addTrack.call(_this, track, stream);
      });
    };

window.RTCPeerConnection.prototype.addTrack = function addTrack(track) {
      var _this2 = this;

for (var _len = arguments.length, streams = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        streams[_key - 1] = arguments[_key];
      }

if (streams) {
        streams.forEach(function (stream) {
          if (!_this2._localStreams) {
            _this2._localStreams = [stream];
          } else if (!_this2._localStreams.includes(stream)) {
            _this2._localStreams.push(stream);
          }
        });
      }
      return _addTrack.apply(this, arguments);
    };
  }
  if (!('removeStream' in window.RTCPeerConnection.prototype)) {
    window.RTCPeerConnection.prototype.removeStream = function removeStream(stream) {
      var _this3 = this;

if (!this._localStreams) {
        this._localStreams = [];
      }
      var index = this._localStreams.indexOf(stream);
      if (index === -1) {
        return;
      }
      this._localStreams.splice(index, 1);
      var tracks = stream.getTracks();
      this.getSenders().forEach(function (sender) {
        if (tracks.includes(sender.track)) {
          _this3.removeTrack(sender);
        }
      });
    };
  }
}

if (this._onaddstream) {
          this.removeEventListener('addstream', this._onaddstream);
          this.removeEventListener('track', this._onaddstreampoly);
        }
        this.addEventListener('addstream', this._onaddstream = f);
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!_this4._remoteStreams) {
              _this4._remoteStreams = [];
            }
            if (_this4._remoteStreams.includes(stream)) {
              return;
            }
            _this4._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            _this4.dispatchEvent(event);
          });
        });
      }
    });
    var origSetRemoteDescription = window.RTCPeerConnection.prototype.setRemoteDescription;
    window.RTCPeerConnection.prototype.setRemoteDescription = function setRemoteDescription() {
      var pc = this;
      if (!this._onaddstreampoly) {
        this.addEventListener('track', this._onaddstreampoly = function (e) {
          e.streams.forEach(function (stream) {
            if (!pc._remoteStreams) {
              pc._remoteStreams = [];
            }
            if (pc._remoteStreams.indexOf(stream) >= 0) {
              return;
            }
            pc._remoteStreams.push(stream);
            var event = new Event('addstream');
            event.stream = stream;
            pc.dispatchEvent(event);
          });
        });
      }
      return origSetRemoteDescription.apply(pc, arguments);
    };
  }
}

function shimCallbacksAPI(window) {
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) !== 'object' || !window.RTCPeerConnection) {
    return;
  }
  var prototype = window.RTCPeerConnection.prototype;
  var origCreateOffer = prototype.createOffer;
  var origCreateAnswer = prototype.createAnswer;
  var setLocalDescription = prototype.setLocalDescription;
  var setRemoteDescription = prototype.setRemoteDescription;
  var addIceCandidate = prototype.addIceCandidate;

prototype.createOffer = function createOffer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateOffer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };

prototype.createAnswer = function createAnswer(successCallback, failureCallback) {
    var options = arguments.length >= 2 ? arguments[2] : arguments[0];
    var promise = origCreateAnswer.apply(this, [options]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };

var withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setLocalDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setLocalDescription = withCallback;

withCallback = function withCallback(description, successCallback, failureCallback) {
    var promise = setRemoteDescription.apply(this, [description]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.setRemoteDescription = withCallback;

withCallback = function withCallback(candidate, successCallback, failureCallback) {
    var promise = addIceCandidate.apply(this, [candidate]);
    if (!failureCallback) {
      return promise;
    }
    promise.then(successCallback, failureCallback);
    return Promise.resolve();
  };
  prototype.addIceCandidate = withCallback;
}

function shimGetUserMedia(window) {
  var navigator = window && window.navigator;

if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    // shim not needed in Safari 12.1
    var mediaDevices = navigator.mediaDevices;
    var _getUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
    navigator.mediaDevices.getUserMedia = function (constraints) {
      return _getUserMedia(shimConstraints(constraints));
    };
  }

if (!navigator.getUserMedia && navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
    navigator.getUserMedia = function getUserMedia(constraints, cb, errcb) {
      navigator.mediaDevices.getUserMedia(constraints).then(cb, errcb);
    }.bind(navigator);
  }
}

function shimConstraints(constraints) {
  if (constraints && constraints.video !== undefined) {
    return Object.assign({}, constraints, { video: utils.compactObject(constraints.video) });
  }

return constraints;
}

function shimTrackEventTransceiver(window) {
  // Add event.transceiver member over deprecated event.receiver
  if ((typeof window === 'undefined' ? 'undefined' : _typeof(window)) === 'object' && window.RTCTrackEvent && 'receiver' in window.RTCTrackEvent.prototype && !('transceiver' in window.RTCTrackEvent.prototype)) {
    Object.defineProperty(window.RTCTrackEvent.prototype, 'transceiver', {
      get: function get() {
        return { receiver: this.receiver };
      }
    });
  }
}

if (typeof offerOptions.offerToReceiveVideo !== 'undefined') {
        // support bit values
        offerOptions.offerToReceiveVideo = !!offerOptions.offerToReceiveVideo;
      }
      var videoTransceiver = this.getTransceivers().find(function (transceiver) {
        return transceiver.receiver.track.kind === 'video';
      });
      if (offerOptions.offerToReceiveVideo === false && videoTransceiver) {
        if (videoTransceiver.direction === 'sendrecv') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('sendonly');
          } else {
            videoTransceiver.direction = 'sendonly';
          }
        } else if (videoTransceiver.direction === 'recvonly') {
          if (videoTransceiver.setDirection) {
            videoTransceiver.setDirection('inactive');
          } else {
            videoTransceiver.direction = 'inactive';
          }
        }
      } else if (offerOptions.offerToReceiveVideo === true && !videoTransceiver) {
        this.addTransceiver('video');
      }
    }
    return origCreateOffer.apply(this, arguments);
  };
}

},{"../utils":15}],15:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
/* eslint-env node */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.extractVersion = extractVersion;
exports.wrapPeerConnectionEvent = wrapPeerConnectionEvent;
exports.disableLog = disableLog;
exports.disableWarnings = disableWarnings;
exports.log = log;
exports.deprecated = deprecated;
exports.detectBrowser = detectBrowser;
exports.compactObject = compactObject;
exports.walkStats = walkStats;
exports.filterStats = filterStats;

var logDisabled_ = true;
var deprecationWarnings_ = true;

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

// Wraps the peerconnection event eventNameToWrap in a function
// which returns the modified event object (or false to prevent
// the event).
function wrapPeerConnectionEvent(window, eventNameToWrap, wrapper) {
  if (!window.RTCPeerConnection) {
    return;
  }
  var proto = window.RTCPeerConnection.prototype;
  var nativeAddEventListener = proto.addEventListener;
  proto.addEventListener = function (nativeEventName, cb) {
    if (nativeEventName !== eventNameToWrap) {
      return nativeAddEventListener.apply(this, arguments);
    }
    var wrappedCallback = function wrappedCallback(e) {
      var modifiedEvent = wrapper(e);
      if (modifiedEvent) {
        cb(modifiedEvent);
      }
    };
    this._eventMap = this._eventMap || {};
    this._eventMap[cb] = wrappedCallback;
    return nativeAddEventListener.apply(this, [nativeEventName, wrappedCallback]);
  };

var nativeRemoveEventListener = proto.removeEventListener;
  proto.removeEventListener = function (nativeEventName, cb) {
    if (nativeEventName !== eventNameToWrap || !this._eventMap || !this._eventMap[cb]) {
      return nativeRemoveEventListener.apply(this, arguments);
    }
    var unwrappedCb = this._eventMap[cb];
    delete this._eventMap[cb];
    return nativeRemoveEventListener.apply(this, [nativeEventName, unwrappedCb]);
  };

Object.defineProperty(proto, 'on' + eventNameToWrap, {
    get: function get() {
      return this['_on' + eventNameToWrap];
    },
    set: function set(cb) {
      if (this['_on' + eventNameToWrap]) {
        this.removeEventListener(eventNameToWrap, this['_on' + eventNameToWrap]);
        delete this['_on' + eventNameToWrap];
      }
      if (cb) {
        this.addEventListener(eventNameToWrap, this['_on' + eventNameToWrap] = cb);
      }
    },

enumerable: true,
    configurable: true
  });
}

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

/**
 * Disable or enable deprecation warnings
 * @param {!boolean} bool set to true to disable warnings.
 */
function disableWarnings(bool) {
  if (typeof bool !== 'boolean') {
    return new Error('Argument type: ' + (typeof bool === 'undefined' ? 'undefined' : _typeof(bool)) + '. Please use a boolean.');
  }
  deprecationWarnings_ = !bool;
  return 'adapter.js deprecation warnings ' + (bool ? 'disabled' : 'enabled');
}

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

/**
 * Shows a deprecation warning suggesting the modern and spec-compatible API.
 */
function deprecated(oldMethod, newMethod) {
  if (!deprecationWarnings_) {
    return;
  }
  console.warn(oldMethod + ' is deprecated, please use ' + newMethod + ' instead.');
}

/**
 * Browser detector.
 *
 * @return {object} result containing browser and version
 *     properties.
 */
function detectBrowser(window) {
  var navigator = window.navigator;

// Returned result object.

var result = { browser: null, version: null };

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

if (navigator.mozGetUserMedia) {
    // Firefox.
    result.browser = 'firefox';
    result.version = extractVersion(navigator.userAgent, /Firefox\/(\d+)\./, 1);
  } else if (navigator.webkitGetUserMedia || window.isSecureContext === false && window.webkitRTCPeerConnection && !window.RTCIceGatherer) {
    // Chrome, Chromium, Webview, Opera.
    // Version matches Chrome/WebRTC version.
    // Chrome 74 removed webkitGetUserMedia on http as well so we need the
    // more complicated fallback to webkitRTCPeerConnection.
    result.browser = 'chrome';
    result.version = extractVersion(navigator.userAgent, /Chrom(e|ium)\/(\d+)\./, 2);
  } else if (navigator.mediaDevices && navigator.userAgent.match(/Edge\/(\d+).(\d+)$/)) {
    // Edge.
    result.browser = 'edge';
    result.version = extractVersion(navigator.userAgent, /Edge\/(\d+).(\d+)$/, 2);
  } else if (window.RTCPeerConnection && navigator.userAgent.match(/AppleWebKit\/(\d+)\./)) {
    // Safari.
    result.browser = 'safari';
    result.version = extractVersion(navigator.userAgent, /AppleWebKit\/(\d+)\./, 1);
    result.supportsUnifiedPlan = window.RTCRtpTransceiver && 'currentDirection' in window.RTCRtpTransceiver.prototype;
  } else {
    // Default fallthrough: not supported.
    result.browser = 'Not a supported browser.';
    return result;
  }

return result;
}

/**
 * Checks if something is an object.
 *
 * @param {*} val The something you want to check.
 * @return true if val is an object, false otherwise.
 */
function isObject(val) {
  return Object.prototype.toString.call(val) === '[object Object]';
}

/**
 * Remove all empty objects and undefined values
 * from a nested object -- an enhanced and vanilla version
 * of Lodash's `compact`.
 */
function compactObject(data) {
  if (!isObject(data)) {
    return data;
  }

return Object.keys(data).reduce(function (accumulator, key) {
    var isObj = isObject(data[key]);
    var value = isObj ? compactObject(data[key]) : data[key];
    var isEmptyObject = isObj && !Object.keys(value).length;
    if (value === undefined || isEmptyObject) {
      return accumulator;
    }
    return Object.assign(accumulator, _defineProperty({}, key, value));
  }, {});
}

/* iterates the stats graph recursively. */
function walkStats(stats, base, resultSet) {
  if (!base || resultSet.has(base.id)) {
    return;
  }
  resultSet.set(base.id, base);
  Object.keys(base).forEach(function (name) {
    if (name.endsWith('Id')) {
      walkStats(stats, stats.get(base[name]), resultSet);
    } else if (name.endsWith('Ids')) {
      base[name].forEach(function (id) {
        walkStats(stats, stats.get(id), resultSet);
      });
    }
  });
}

/* filter getStats for a sender/receiver track. */
function filterStats(result, track, outbound) {
  var streamStatsType = outbound ? 'outbound-rtp' : 'inbound-rtp';
  var filteredResult = new Map();
  if (track === null) {
    return filteredResult;
  }
  var trackStats = [];
  result.forEach(function (value) {
    if (value.type === 'track' && value.trackIdentifier === track.id) {
      trackStats.push(value);
    }
  });
  trackStats.forEach(function (trackStat) {
    result.forEach(function (stats) {
      if (stats.type === streamStatsType && stats.trackId === trackStat.id) {
        walkStats(result, stats, filteredResult);
      }
    });
  });
  return filteredResult;
}

},{}],16:[function(require,module,exports){
/*
 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

var SDPUtils = require('sdp');

function fixStatsType(stat) {
  return {
    inboundrtp: 'inbound-rtp',
    outboundrtp: 'outbound-rtp',
    candidatepair: 'candidate-pair',
    localcandidate: 'local-candidate',
    remotecandidate: 'remote-candidate'
  }[stat.type] || stat.type;
}

function writeMediaSection(transceiver, caps, type, stream, dtlsRole) {
  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' : dtlsRole || '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';
  }

if (transceiver.rtpSender) {
    var trackId = transceiver.rtpSender._initialTrackId ||
        transceiver.rtpSender.track.id;
    transceiver.rtpSender._initialTrackId = trackId;
    // spec.
    var msid = 'msid:' + (stream ? stream.id : '-') + ' ' +
        trackId + '\r\n';
    sdp += 'a=' + msid;
    // for Chrome. Legacy should no longer be required.
    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
        ' ' + msid;

// RTX
    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;
}

// Edge does not like
// 1) stun: filtered after 14393 unless ?transport=udp is present
// 2) turn: that does not have all of turn:host:port?transport=udp
// 3) turn: with ipv6 addresses
// 4) turn: occurring muliple times
function filterIceServers(iceServers, edgeVersion) {
  var hasTurn = false;
  iceServers = JSON.parse(JSON.stringify(iceServers));
  return iceServers.filter(function(server) {
    if (server && (server.urls || server.url)) {
      var urls = server.urls || server.url;
      if (server.url && !server.urls) {
        console.warn('RTCIceServer.url is deprecated! Use urls instead.');
      }
      var isString = typeof urls === 'string';
      if (isString) {
        urls = [urls];
      }
      urls = urls.filter(function(url) {
        var validTurn = url.indexOf('turn:') === 0 &&
            url.indexOf('transport=udp') !== -1 &&
            url.indexOf('turn:[') === -1 &&
            !hasTurn;

if (validTurn) {
          hasTurn = true;
          return true;
        }
        return url.indexOf('stun:') === 0 && edgeVersion >= 14393 &&
            url.indexOf('?transport=udp') === -1;
      });

delete server.url;
      server.urls = isString ? urls[0] : urls;
      return !!urls.length;
    }
  });
}

// Determines the intersection of local and remote capabilities.
function getCommonCapabilities(localCapabilities, remoteCapabilities) {
  var commonCapabilities = {
    codecs: [],
    headerExtensions: [],
    fecMechanisms: []
  };

var rtxCapabilityMatches = function(lRtx, rRtx, lCodecs, rCodecs) {
    var lCodec = findCodecByPayloadType(lRtx.parameters.apt, lCodecs);
    var rCodec = findCodecByPayloadType(rRtx.parameters.apt, rCodecs);
    return lCodec && rCodec &&
        lCodec.name.toLowerCase() === rCodec.name.toLowerCase();
  };

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) {
        if (lCodec.name.toLowerCase() === 'rtx' &&
            lCodec.parameters && rCodec.parameters.apt) {
          // for RTX we need to find the local rtx that has a apt
          // which points to the same local codec as the remote one.
          if (!rtxCapabilityMatches(lCodec, rCodec,
              localCapabilities.codecs, remoteCapabilities.codecs)) {
            continue;
          }
        }
        rCodec = JSON.parse(JSON.stringify(rCodec)); // deepcopy
        // 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;
}

// is action=setLocalDescription with type allowed in signalingState
function isActionAllowedInSignalingState(action, type, signalingState) {
  return {
    offer: {
      setLocalDescription: ['stable', 'have-local-offer'],
      setRemoteDescription: ['stable', 'have-remote-offer']
    },
    answer: {
      setLocalDescription: ['have-remote-offer', 'have-local-pranswer'],
      setRemoteDescription: ['have-local-offer', 'have-remote-pranswer']
    }
  }[type][action].indexOf(signalingState) !== -1;
}

function makeError(name, description) {
  var e = new Error(description);
  e.name = name;
  // legacy error codes from https://heycam.github.io/webidl/#idl-DOMException-error-names
  e.code = {
    NotSupportedError: 9,
    InvalidStateError: 11,
    InvalidAccessError: 15,
    TypeError: undefined,
    OperationError: undefined
  }[name];
  return e;
}

module.exports = function(window, edgeVersion) {
  // https://w3c.github.io/mediacapture-main/#mediastream
  // Helper function to add the track to the stream and
  // dispatch the event ourselves.
  function addTrackToStreamAndFireEvent(track, stream) {
    stream.addTrack(track);
    stream.dispatchEvent(new window.MediaStreamTrackEvent('addtrack',
        {track: track}));
  }

function removeTrackFromStreamAndFireEvent(track, stream) {
    stream.removeTrack(track);
    stream.dispatchEvent(new window.MediaStreamTrackEvent('removetrack',
        {track: track}));
  }

var RTCPeerConnection = function(config) {
    var pc = this;

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

this.canTrickleIceCandidates = null;

this.needNegotiation = false;

this.localStreams = [];
    this.remoteStreams = [];

this._localDescription = null;
    this._remoteDescription = null;

this.signalingState = 'stable';
    this.iceConnectionState = 'new';
    this.connectionState = 'new';
    this.iceGatheringState = 'new';

config = JSON.parse(JSON.stringify(config || {}));

this.usingBundle = config.bundlePolicy === 'max-bundle';
    if (config.rtcpMuxPolicy === 'negotiate') {
      throw(makeError('NotSupportedError',
          'rtcpMuxPolicy \'negotiate\' is not supported'));
    } else if (!config.rtcpMuxPolicy) {
      config.rtcpMuxPolicy = 'require';
    }

switch (config.iceTransportPolicy) {
      case 'all':
      case 'relay':
        break;
      default:
        config.iceTransportPolicy = 'all';
        break;
    }

switch (config.bundlePolicy) {
      case 'balanced':
      case 'max-compat':
      case 'max-bundle':
        break;
      default:
        config.bundlePolicy = 'balanced';
        break;
    }

config.iceServers = filterIceServers(config.iceServers || [], edgeVersion);

this._iceGatherers = [];
    if (config.iceCandidatePoolSize) {
      for (var i = config.iceCandidatePoolSize; i > 0; i--) {
        this._iceGatherers.push(new window.RTCIceGatherer({
          iceServers: config.iceServers,
          gatherPolicy: config.iceTransportPolicy
        }));
      }
    } else {
      config.iceCandidatePoolSize = 0;
    }

this._config = config;

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

this._sdpSessionId = SDPUtils.generateSessionId();
    this._sdpSessionVersion = 0;

this._dtlsRole = undefined; // role for a=setup to use in answers.

this._isClosed = false;
  };

Object.defineProperty(RTCPeerConnection.prototype, 'localDescription', {
    configurable: true,
    get: function() {
      return this._localDescription;
    }
  });
  Object.defineProperty(RTCPeerConnection.prototype, 'remoteDescription', {
    configurable: true,
    get: function() {
      return this._remoteDescription;
    }
  });

// set up event handlers on prototype
  RTCPeerConnection.prototype.onicecandidate = null;
  RTCPeerConnection.prototype.onaddstream = null;
  RTCPeerConnection.prototype.ontrack = null;
  RTCPeerConnection.prototype.onremovestream = null;
  RTCPeerConnection.prototype.onsignalingstatechange = null;
  RTCPeerConnection.prototype.oniceconnectionstatechange = null;
  RTCPeerConnection.prototype.onconnectionstatechange = null;
  RTCPeerConnection.prototype.onicegatheringstatechange = null;
  RTCPeerConnection.prototype.onnegotiationneeded = null;
  RTCPeerConnection.prototype.ondatachannel = null;

RTCPeerConnection.prototype._dispatchEvent = function(name, event) {
    if (this._isClosed) {
      return;
    }
    this.dispatchEvent(event);
    if (typeof this['on' + name] === 'function') {
      this['on' + name](event);
    }
  };

RTCPeerConnection.prototype._emitGatheringStateChange = function() {
    var event = new Event('icegatheringstatechange');
    this._dispatchEvent('icegatheringstatechange', event);
  };

RTCPeerConnection.prototype.getConfiguration = function() {
    return this._config;
  };

RTCPeerConnection.prototype.getLocalStreams = function() {
    return this.localStreams;
  };

RTCPeerConnection.prototype.getRemoteStreams = function() {
    return this.remoteStreams;
  };

// internal helper to create a transceiver object.
  // (which is not yet the same as the WebRTC 1.0 transceiver)
  RTCPeerConnection.prototype._createTransceiver = function(kind, doNotAdd) {
    var hasBundleTransport = this.transceivers.length > 0;
    var transceiver = {
      track: null,
      iceGatherer: null,
      iceTransport: null,
      dtlsTransport: null,
      localCapabilities: null,
      remoteCapabilities: null,
      rtpSender: null,
      rtpReceiver: null,
      kind: kind,
      mid: null,
      sendEncodingParameters: null,
      recvEncodingParameters: null,
      stream: null,
      associatedRemoteMediaStreams: [],
      wantReceive: true
    };
    if (this.usingBundle && hasBundleTransport) {
      transceiver.iceTransport = this.transceivers[0].iceTransport;
      transceiver.dtlsTransport = this.transceivers[0].dtlsTransport;
    } else {
      var transports = this._createIceAndDtlsTransports();
      transceiver.iceTransport = transports.iceTransport;
      transceiver.dtlsTransport = transports.dtlsTransport;
    }
    if (!doNotAdd) {
      this.transceivers.push(transceiver);
    }
    return transceiver;
  };

RTCPeerConnection.prototype.addTrack = function(track, stream) {
    if (this._isClosed) {
      throw makeError('InvalidStateError',
          'Attempted to call addTrack on a closed peerconnection.');
    }

var alreadyExists = this.transceivers.find(function(s) {
      return s.track === track;
    });

if (alreadyExists) {
      throw makeError('InvalidAccessError', 'Track already exists.');
    }

var transceiver;
    for (var i = 0; i < this.transceivers.length; i++) {
      if (!this.transceivers[i].track &&
          this.transceivers[i].kind === track.kind) {
        transceiver = this.transceivers[i];
      }
    }
    if (!transceiver) {
      transceiver = this._createTransceiver(track.kind);
    }

this._maybeFireNegotiationNeeded();

if (this.localStreams.indexOf(stream) === -1) {
      this.localStreams.push(stream);
    }

transceiver.track = track;
    transceiver.stream = stream;
    transceiver.rtpSender = new window.RTCRtpSender(track,
        transceiver.dtlsTransport);
    return transceiver.rtpSender;
  };

RTCPeerConnection.prototype.addStream = function(stream) {
    var pc = this;
    if (edgeVersion >= 15025) {
      stream.getTracks().forEach(function(track) {
        pc.addTrack(track, stream);
      });
    } else {
      // Clone is necessary for local demos mostly, attaching directly
      // to two different senders does not work (build 10547).
      // Fixed in 15025 (or earlier)
      var clonedStream = stream.clone();
      stream.getTracks().forEach(function(track, idx) {
        var clonedTrack = clonedStream.getTracks()[idx];
        track.addEventListener('enabled', function(event) {
          clonedTrack.enabled = event.enabled;
        });
      });
      clonedStream.getTracks().forEach(function(track) {
        pc.addTrack(track, clonedStream);
      });
    }
  };

RTCPeerConnection.prototype.removeTrack = function(sender) {
    if (this._isClosed) {
      throw makeError('InvalidStateError',
          'Attempted to call removeTrack on a closed peerconnection.');
    }

if (!(sender instanceof window.RTCRtpSender)) {
      throw new TypeError('Argument 1 of RTCPeerConnection.removeTrack ' +
          'does not implement interface RTCRtpSender.');
    }

var transceiver = this.transceivers.find(function(t) {
      return t.rtpSender === sender;
    });

if (!transceiver) {
      throw makeError('InvalidAccessError',
          'Sender was not created by this connection.');
    }
    var stream = transceiver.stream;

transceiver.rtpSender.stop();
    transceiver.rtpSender = null;
    transceiver.track = null;
    transceiver.stream = null;

// remove the stream from the set of local streams
    var localStreams = this.transceivers.map(function(t) {
      return t.stream;
    });
    if (localStreams.indexOf(stream) === -1 &&
        this.localStreams.indexOf(stream) > -1) {
      this.localStreams.splice(this.localStreams.indexOf(stream), 1);
    }

this._maybeFireNegotiationNeeded();
  };

RTCPeerConnection.prototype.removeStream = function(stream) {
    var pc = this;
    stream.getTracks().forEach(function(track) {
      var sender = pc.getSenders().find(function(s) {
        return s.track === track;
      });
      if (sender) {
        pc.removeTrack(sender);
      }
    });
  };

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

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

RTCPeerConnection.prototype._createIceGatherer = function(sdpMLineIndex,
      usingBundle) {
    var pc = this;
    if (usingBundle && sdpMLineIndex > 0) {
      return this.transceivers[0].iceGatherer;
    } else if (this._iceGatherers.length) {
      return this._iceGatherers.shift();
    }
    var iceGatherer = new window.RTCIceGatherer({
      iceServers: this._config.iceServers,
      gatherPolicy: this._config.iceTransportPolicy
    });
    Object.defineProperty(iceGatherer, 'state',
        {value: 'new', writable: true}
    );

this.transceivers[sdpMLineIndex].bufferedCandidateEvents = [];
    this.transceivers[sdpMLineIndex].bufferCandidates = function(event) {
      var end = !event.candidate || Object.keys(event.candidate).length === 0;
      // polyfill since RTCIceGatherer.state is not implemented in
      // Edge 10547 yet.
      iceGatherer.state = end ? 'completed' : 'gathering';
      if (pc.transceivers[sdpMLineIndex].bufferedCandidateEvents !== null) {
        pc.transceivers[sdpMLineIndex].bufferedCandidateEvents.push(event);
      }
    };
    iceGatherer.addEventListener('localcandidate',
      this.transceivers[sdpMLineIndex].bufferCandidates);
    return iceGatherer;
  };

// start gathering from an RTCIceGatherer.
  RTCPeerConnection.prototype._gather = function(mid, sdpMLineIndex) {
    var pc = this;
    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
    if (iceGatherer.onlocalcandidate) {
      return;
    }
    var bufferedCandidateEvents =
      this.transceivers[sdpMLineIndex].bufferedCandidateEvents;
    this.transceivers[sdpMLineIndex].bufferedCandidateEvents = null;
    iceGatherer.removeEventListener('localcandidate',
      this.transceivers[sdpMLineIndex].bufferCandidates);
    iceGatherer.onlocalcandidate = function(evt) {
      if (pc.usingBundle && sdpMLineIndex > 0) {
        // if we know that we use bundle we can drop candidates with
        // ѕdpMLineIndex > 0. If we don't do this then our state gets
        // confused since we dispose the extra ice gatherer.
        return;
      }
      var event = new Event('icecandidate');
      event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

var serializedCandidate = SDPUtils.writeCandidate(cand);
        event.candidate = Object.assign(event.candidate,
            SDPUtils.parseCandidate(serializedCandidate));

event.candidate.candidate = serializedCandidate;
        event.candidate.toJSON = function() {
          return {
            candidate: event.candidate.candidate,
            sdpMid: event.candidate.sdpMid,
            sdpMLineIndex: event.candidate.sdpMLineIndex,
            usernameFragment: event.candidate.usernameFragment
          };
        };
      }

// update local description.
      var sections = SDPUtils.getMediaSections(pc._localDescription.sdp);
      if (!end) {
        sections[event.candidate.sdpMLineIndex] +=
            'a=' + event.candidate.candidate + '\r\n';
      } else {
        sections[event.candidate.sdpMLineIndex] +=
            'a=end-of-candidates\r\n';
      }
      pc._localDescription.sdp =
          SDPUtils.getDescription(pc._localDescription.sdp) +
          sections.join('');
      var complete = pc.transceivers.every(function(transceiver) {
        return transceiver.iceGatherer &&
            transceiver.iceGatherer.state === 'completed';
      });

if (pc.iceGatheringState !== 'gathering') {
        pc.iceGatheringState = 'gathering';
        pc._emitGatheringStateChange();
      }

// Emit candidate. Also emit null candidate when all gatherers are
      // complete.
      if (!end) {
        pc._dispatchEvent('icecandidate', event);
      }
      if (complete) {
        pc._dispatchEvent('icecandidate', new Event('icecandidate'));
        pc.iceGatheringState = 'complete';
        pc._emitGatheringStateChange();
      }
    };

// emit already gathered candidates.
    window.setTimeout(function() {
      bufferedCandidateEvents.forEach(function(e) {
        iceGatherer.onlocalcandidate(e);
      });
    }, 0);
  };

// Create ICE transport and DTLS transport.
  RTCPeerConnection.prototype._createIceAndDtlsTransports = function() {
    var pc = this;
    var iceTransport = new window.RTCIceTransport(null);
    iceTransport.onicestatechange = function() {
      pc._updateIceConnectionState();
      pc._updateConnectionState();
    };

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

// Destroy ICE gatherer, ICE transport and DTLS transport.
  // Without triggering the callbacks.
  RTCPeerConnection.prototype._disposeIceAndDtlsTransports = function(
      sdpMLineIndex) {
    var iceGatherer = this.transceivers[sdpMLineIndex].iceGatherer;
    if (iceGatherer) {
      delete iceGatherer.onlocalcandidate;
      delete this.transceivers[sdpMLineIndex].iceGatherer;
    }
    var iceTransport = this.transceivers[sdpMLineIndex].iceTransport;
    if (iceTransport) {
      delete iceTransport.onicestatechange;
      delete this.transceivers[sdpMLineIndex].iceTransport;
    }
    var dtlsTransport = this.transceivers[sdpMLineIndex].dtlsTransport;
    if (dtlsTransport) {
      delete dtlsTransport.ondtlsstatechange;
      delete dtlsTransport.onerror;
      delete this.transceivers[sdpMLineIndex].dtlsTransport;
    }
  };

// Start the RTP Sender and Receiver for a transceiver.
  RTCPeerConnection.prototype._transceive = function(transceiver,
      send, recv) {
    var params = getCommonCapabilities(transceiver.localCapabilities,
        transceiver.remoteCapabilities);
    if (send && transceiver.rtpSender) {
      params.encodings = transceiver.sendEncodingParameters;
      params.rtcp = {
        cname: SDPUtils.localCName,
        compound: transceiver.rtcpParameters.compound
      };
      if (transceiver.recvEncodingParameters.length) {
        params.rtcp.ssrc = transceiver.recvEncodingParameters[0].ssrc;
      }
      transceiver.rtpSender.send(params);
    }
    if (recv && transceiver.rtpReceiver && params.codecs.length > 0) {
      // remove RTX field in Edge 14942
      if (transceiver.kind === 'video'
          && transceiver.recvEncodingParameters
          && edgeVersion < 15019) {
        transceiver.recvEncodingParameters.forEach(function(p) {
          delete p.rtx;
        });
      }
      if (transceiver.recvEncodingParameters.length) {
        params.encodings = transceiver.recvEncodingParameters;
      } else {
        params.encodings = [{}];
      }
      params.rtcp = {
        compound: transceiver.rtcpParameters.compound
      };
      if (transceiver.rtcpParameters.cname) {
        params.rtcp.cname = transceiver.rtcpParameters.cname;
      }
      if (transceiver.sendEncodingParameters.length) {
        params.rtcp.ssrc = transceiver.sendEncodingParameters[0].ssrc;
      }
      transceiver.rtpReceiver.receive(params);
    }
  };

RTCPeerConnection.prototype.setLocalDescription = function(description) {
    var pc = this;

// Note: pranswer is not supported.
    if (['offer', 'answer'].indexOf(description.type) === -1) {
      return Promise.reject(makeError('TypeError',
          'Unsupported type "' + description.type + '"'));
    }

if (!isActionAllowedInSignalingState('setLocalDescription',
        description.type, pc.signalingState) || pc._isClosed) {
      return Promise.reject(makeError('InvalidStateError',
          'Can not set local ' + description.type +
          ' in state ' + pc.signalingState));
    }

var sections;
    var sessionpart;
    if (description.type === 'offer') {
      // 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);
        pc.transceivers[sdpMLineIndex].localCapabilities = caps;
      });

pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
        pc._gather(transceiver.mid, sdpMLineIndex);
      });
    } else if (description.type === 'answer') {
      sections = SDPUtils.splitSections(pc._remoteDescription.sdp);
      sessionpart = sections.shift();
      var isIceLite = SDPUtils.matchPrefix(sessionpart,
          'a=ice-lite').length > 0;
      sections.forEach(function(mediaSection, sdpMLineIndex) {
        var transceiver = pc.transceivers[sdpMLineIndex];
        var iceGatherer = transceiver.iceGatherer;
        var iceTransport = transceiver.iceTransport;
        var dtlsTransport = transceiver.dtlsTransport;
        var localCapabilities = transceiver.localCapabilities;
        var remoteCapabilities = transceiver.remoteCapabilities;

// treat bundle-only as not-rejected.
        var rejected = SDPUtils.isRejected(mediaSection) &&
            SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;

if (!rejected && !transceiver.rejected) {
          var remoteIceParameters = SDPUtils.getIceParameters(
              mediaSection, sessionpart);
          var remoteDtlsParameters = SDPUtils.getDtlsParameters(
              mediaSection, sessionpart);
          if (isIceLite) {
            remoteDtlsParameters.role = 'server';
          }

if (!pc.usingBundle || sdpMLineIndex === 0) {
            pc._gather(transceiver.mid, sdpMLineIndex);
            if (iceTransport.state === 'new') {
              iceTransport.start(iceGatherer, remoteIceParameters,
                  isIceLite ? 'controlling' : 'controlled');
            }
            if (dtlsTransport.state === 'new') {
              dtlsTransport.start(remoteDtlsParameters);
            }
          }

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

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

pc._localDescription = {
      type: description.type,
      sdp: description.sdp
    };
    if (description.type === 'offer') {
      pc._updateSignalingState('have-local-offer');
    } else {
      pc._updateSignalingState('stable');
    }

return Promise.resolve();
  };

RTCPeerConnection.prototype.setRemoteDescription = function(description) {
    var pc = this;

if (!isActionAllowedInSignalingState('setRemoteDescription',
        description.type, pc.signalingState) || pc._isClosed) {
      return Promise.reject(makeError('InvalidStateError',
          'Can not set remote ' + description.type +
          ' in state ' + pc.signalingState));
    }

sections.forEach(function(mediaSection, sdpMLineIndex) {
      var lines = SDPUtils.splitLines(mediaSection);
      var kind = SDPUtils.getKind(mediaSection);
      // treat bundle-only as not-rejected.
      var rejected = SDPUtils.isRejected(mediaSection) &&
          SDPUtils.matchPrefix(mediaSection, 'a=bundle-only').length === 0;
      var protocol = lines[0].substr(2).split(' ')[2];

var direction = SDPUtils.getDirection(mediaSection, sessionpart);
      var remoteMsid = SDPUtils.parseMsid(mediaSection);

var mid = SDPUtils.getMid(mediaSection) || SDPUtils.generateIdentifier();

// Reject datachannels which are not implemented yet.
      if (rejected || (kind === 'application' && (protocol === 'DTLS/SCTP' ||
          protocol === 'UDP/DTLS/SCTP'))) {
        // TODO: this is dangerous in the case where a non-rejected m-line
        //     becomes rejected.
        pc.transceivers[sdpMLineIndex] = {
          mid: mid,
          kind: kind,
          protocol: protocol,
          rejected: true
        };
        return;
      }

if (!rejected && pc.transceivers[sdpMLineIndex] &&
          pc.transceivers[sdpMLineIndex].rejected) {
        // recycle a rejected transceiver.
        pc.transceivers[sdpMLineIndex] = pc._createTransceiver(kind, true);
      }

var transceiver;
      var iceGatherer;
      var iceTransport;
      var dtlsTransport;
      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 rtcpParameters = SDPUtils.parseRtcpParameters(mediaSection);

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;
          });

// Check if we can use BUNDLE and dispose transports.
      if ((description.type === 'offer' || description.type === 'answer') &&
          !rejected && usingBundle && sdpMLineIndex > 0 &&
          pc.transceivers[sdpMLineIndex]) {
        pc._disposeIceAndDtlsTransports(sdpMLineIndex);
        pc.transceivers[sdpMLineIndex].iceGatherer =
            pc.transceivers[0].iceGatherer;
        pc.transceivers[sdpMLineIndex].iceTransport =
            pc.transceivers[0].iceTransport;
        pc.transceivers[sdpMLineIndex].dtlsTransport =
            pc.transceivers[0].dtlsTransport;
        if (pc.transceivers[sdpMLineIndex].rtpSender) {
          pc.transceivers[sdpMLineIndex].rtpSender.setTransport(
              pc.transceivers[0].dtlsTransport);
        }
        if (pc.transceivers[sdpMLineIndex].rtpReceiver) {
          pc.transceivers[sdpMLineIndex].rtpReceiver.setTransport(
              pc.transceivers[0].dtlsTransport);
        }
      }
      if (description.type === 'offer' && !rejected) {
        transceiver = pc.transceivers[sdpMLineIndex] ||
            pc._createTransceiver(kind);
        transceiver.mid = mid;

if (!transceiver.iceGatherer) {
          transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
              usingBundle);
        }

if (cands.length && transceiver.iceTransport.state === 'new') {
          if (isComplete && (!usingBundle || sdpMLineIndex === 0)) {
            transceiver.iceTransport.setRemoteCandidates(cands);
          } else {
            cands.forEach(function(candidate) {
              maybeAddCandidate(transceiver.iceTransport, candidate);
            });
          }
        }

localCapabilities = window.RTCRtpReceiver.getCapabilities(kind);

// filter RTX until additional stuff needed for RTX is implemented
        // in adapter.js
        if (edgeVersion < 15019) {
          localCapabilities.codecs = localCapabilities.codecs.filter(
              function(codec) {
                return codec.name !== 'rtx';
              });
        }

sendEncodingParameters = transceiver.sendEncodingParameters || [{
          ssrc: (2 * sdpMLineIndex + 2) * 1001
        }];

// TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
        var isNewTrack = false;
        if (direction === 'sendrecv' || direction === 'sendonly') {
          isNewTrack = !transceiver.rtpReceiver;
          rtpReceiver = transceiver.rtpReceiver ||
              new window.RTCRtpReceiver(transceiver.dtlsTransport, kind);

if (isNewTrack) {
            var stream;
            track = rtpReceiver.track;
            // FIXME: does not work with Plan B.
            if (remoteMsid && remoteMsid.stream === '-') {
              // no-op. a stream id of '-' means: no associated stream.
            } else if (remoteMsid) {
              if (!streams[remoteMsid.stream]) {
                streams[remoteMsid.stream] = new window.MediaStream();
                Object.defineProperty(streams[remoteMsid.stream], 'id', {
                  get: function() {
                    return remoteMsid.stream;
                  }
                });
              }
              Object.defineProperty(track, 'id', {
                get: function() {
                  return remoteMsid.track;
                }
              });
              stream = streams[remoteMsid.stream];
            } else {
              if (!streams.default) {
                streams.default = new window.MediaStream();
              }
              stream = streams.default;
            }
            if (stream) {
              addTrackToStreamAndFireEvent(track, stream);
              transceiver.associatedRemoteMediaStreams.push(stream);
            }
            receiverList.push([track, rtpReceiver, stream]);
          }
        } else if (transceiver.rtpReceiver && transceiver.rtpReceiver.track) {
          transceiver.associatedRemoteMediaStreams.forEach(function(s) {
            var nativeTrack = s.getTracks().find(function(t) {
              return t.id === transceiver.rtpReceiver.track.id;
            });
            if (nativeTrack) {
              removeTrackFromStreamAndFireEvent(nativeTrack, s);
            }
          });
          transceiver.associatedRemoteMediaStreams = [];
        }

transceiver.localCapabilities = localCapabilities;
        transceiver.remoteCapabilities = remoteCapabilities;
        transceiver.rtpReceiver = rtpReceiver;
        transceiver.rtcpParameters = rtcpParameters;
        transceiver.sendEncodingParameters = sendEncodingParameters;
        transceiver.recvEncodingParameters = recvEncodingParameters;

// Start the RTCRtpReceiver now. The RTPSender is started in
        // setLocalDescription.
        pc._transceive(pc.transceivers[sdpMLineIndex],
            false,
            isNewTrack);
      } else if (description.type === 'answer' && !rejected) {
        transceiver = pc.transceivers[sdpMLineIndex];
        iceGatherer = transceiver.iceGatherer;
        iceTransport = transceiver.iceTransport;
        dtlsTransport = transceiver.dtlsTransport;
        rtpReceiver = transceiver.rtpReceiver;
        sendEncodingParameters = transceiver.sendEncodingParameters;
        localCapabilities = transceiver.localCapabilities;

pc.transceivers[sdpMLineIndex].recvEncodingParameters =
            recvEncodingParameters;
        pc.transceivers[sdpMLineIndex].remoteCapabilities =
            remoteCapabilities;
        pc.transceivers[sdpMLineIndex].rtcpParameters = rtcpParameters;

if (cands.length && iceTransport.state === 'new') {
          if ((isIceLite || isComplete) &&
              (!usingBundle || sdpMLineIndex === 0)) {
            iceTransport.setRemoteCandidates(cands);
          } else {
            cands.forEach(function(candidate) {
              maybeAddCandidate(transceiver.iceTransport, candidate);
            });
          }
        }

if (!usingBundle || sdpMLineIndex === 0) {
          if (iceTransport.state === 'new') {
            iceTransport.start(iceGatherer, remoteIceParameters,
                'controlling');
          }
          if (dtlsTransport.state === 'new') {
            dtlsTransport.start(remoteDtlsParameters);
          }
        }

// If the offer contained RTX but the answer did not,
        // remove RTX from sendEncodingParameters.
        var commonCapabilities = getCommonCapabilities(
          transceiver.localCapabilities,
          transceiver.remoteCapabilities);

var hasRtx = commonCapabilities.codecs.filter(function(c) {
          return c.name.toLowerCase() === 'rtx';
        }).length;
        if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
          delete transceiver.sendEncodingParameters[0].rtx;
        }

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

// TODO: rewrite to use http://w3c.github.io/webrtc-pc/#set-associated-remote-streams
        if (rtpReceiver &&
            (direction === 'sendrecv' || direction === 'sendonly')) {
          track = rtpReceiver.track;
          if (remoteMsid) {
            if (!streams[remoteMsid.stream]) {
              streams[remoteMsid.stream] = new window.MediaStream();
            }
            addTrackToStreamAndFireEvent(track, streams[remoteMsid.stream]);
            receiverList.push([track, rtpReceiver, streams[remoteMsid.stream]]);
          } else {
            if (!streams.default) {
              streams.default = new window.MediaStream();
            }
            addTrackToStreamAndFireEvent(track, streams.default);
            receiverList.push([track, rtpReceiver, streams.default]);
          }
        } else {
          // FIXME: actually the receiver should be created later.
          delete transceiver.rtpReceiver;
        }
      }
    });

if (pc._dtlsRole === undefined) {
      pc._dtlsRole = description.type === 'offer' ? 'active' : 'passive';
    }

pc._remoteDescription = {
      type: description.type,
      sdp: description.sdp
    };
    if (description.type === 'offer') {
      pc._updateSignalingState('have-remote-offer');
    } else {
      pc._updateSignalingState('stable');
    }
    Object.keys(streams).forEach(function(sid) {
      var stream = streams[sid];
      if (stream.getTracks().length) {
        if (pc.remoteStreams.indexOf(stream) === -1) {
          pc.remoteStreams.push(stream);
          var event = new Event('addstream');
          event.stream = stream;
          window.setTimeout(function() {
            pc._dispatchEvent('addstream', event);
          });
        }

receiverList.forEach(function(item) {
          var track = item[0];
          var receiver = item[1];
          if (stream.id !== item[2].id) {
            return;
          }
          fireAddTrack(pc, track, receiver, [stream]);
        });
      }
    });
    receiverList.forEach(function(item) {
      if (item[2]) {
        return;
      }
      fireAddTrack(pc, item[0], item[1], []);
    });

// check whether addIceCandidate({}) was called within four seconds after
    // setRemoteDescription.
    window.setTimeout(function() {
      if (!(pc && pc.transceivers)) {
        return;
      }
      pc.transceivers.forEach(function(transceiver) {
        if (transceiver.iceTransport &&
            transceiver.iceTransport.state === 'new' &&
            transceiver.iceTransport.getRemoteCandidates().length > 0) {
          console.warn('Timeout for addRemoteCandidate. Consider sending ' +
              'an end-of-candidates notification');
          transceiver.iceTransport.addRemoteCandidate({});
        }
      });
    }, 4000);

return Promise.resolve();
  };

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._isClosed = true;
    this._updateSignalingState('closed');
  };

// Update the signaling state.
  RTCPeerConnection.prototype._updateSignalingState = function(newState) {
    this.signalingState = newState;
    var event = new Event('signalingstatechange');
    this._dispatchEvent('signalingstatechange', event);
  };

// Determine whether to fire the negotiationneeded event.
  RTCPeerConnection.prototype._maybeFireNegotiationNeeded = function() {
    var pc = this;
    if (this.signalingState !== 'stable' || this.needNegotiation === true) {
      return;
    }
    this.needNegotiation = true;
    window.setTimeout(function() {
      if (pc.needNegotiation) {
        pc.needNegotiation = false;
        var event = new Event('negotiationneeded');
        pc._dispatchEvent('negotiationneeded', event);
      }
    }, 0);
  };

// Update the ice connection state.
  RTCPeerConnection.prototype._updateIceConnectionState = function() {
    var newState;
    var states = {
      'new': 0,
      closed: 0,
      checking: 0,
      connected: 0,
      completed: 0,
      disconnected: 0,
      failed: 0
    };
    this.transceivers.forEach(function(transceiver) {
      if (transceiver.iceTransport && !transceiver.rejected) {
        states[transceiver.iceTransport.state]++;
      }
    });

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

if (newState !== this.iceConnectionState) {
      this.iceConnectionState = newState;
      var event = new Event('iceconnectionstatechange');
      this._dispatchEvent('iceconnectionstatechange', event);
    }
  };

// Update the connection state.
  RTCPeerConnection.prototype._updateConnectionState = function() {
    var newState;
    var states = {
      'new': 0,
      closed: 0,
      connecting: 0,
      connected: 0,
      completed: 0,
      disconnected: 0,
      failed: 0
    };
    this.transceivers.forEach(function(transceiver) {
      if (transceiver.iceTransport && transceiver.dtlsTransport &&
          !transceiver.rejected) {
        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) {
      newState = 'connecting';
    } else if (states.disconnected > 0) {
      newState = 'disconnected';
    } else if (states.new > 0) {
      newState = 'new';
    } else if (states.connected > 0) {
      newState = 'connected';
    }

if (newState !== this.connectionState) {
      this.connectionState = newState;
      var event = new Event('connectionstatechange');
      this._dispatchEvent('connectionstatechange', event);
    }
  };

RTCPeerConnection.prototype.createOffer = function() {
    var pc = this;

if (pc._isClosed) {
      return Promise.reject(makeError('InvalidStateError',
          'Can not call createOffer after close'));
    }

var numAudioTracks = pc.transceivers.filter(function(t) {
      return t.kind === 'audio';
    }).length;
    var numVideoTracks = pc.transceivers.filter(function(t) {
      return t.kind === 'video';
    }).length;

// Determine number of audio and video tracks we need to send/recv.
    var offerOptions = arguments[0];
    if (offerOptions) {
      // Reject Chrome legacy constraints.
      if (offerOptions.mandatory || offerOptions.optional) {
        throw new TypeError(
            'Legacy mandatory/optional constraints not supported.');
      }
      if (offerOptions.offerToReceiveAudio !== undefined) {
        if (offerOptions.offerToReceiveAudio === true) {
          numAudioTracks = 1;
        } else if (offerOptions.offerToReceiveAudio === false) {
          numAudioTracks = 0;
        } else {
          numAudioTracks = offerOptions.offerToReceiveAudio;
        }
      }
      if (offerOptions.offerToReceiveVideo !== undefined) {
        if (offerOptions.offerToReceiveVideo === true) {
          numVideoTracks = 1;
        } else if (offerOptions.offerToReceiveVideo === false) {
          numVideoTracks = 0;
        } else {
          numVideoTracks = offerOptions.offerToReceiveVideo;
        }
      }
    }

pc.transceivers.forEach(function(transceiver) {
      if (transceiver.kind === 'audio') {
        numAudioTracks--;
        if (numAudioTracks < 0) {
          transceiver.wantReceive = false;
        }
      } else if (transceiver.kind === 'video') {
        numVideoTracks--;
        if (numVideoTracks < 0) {
          transceiver.wantReceive = false;
        }
      }
    });

// Create M-lines for recvonly streams.
    while (numAudioTracks > 0 || numVideoTracks > 0) {
      if (numAudioTracks > 0) {
        pc._createTransceiver('audio');
        numAudioTracks--;
      }
      if (numVideoTracks > 0) {
        pc._createTransceiver('video');
        numVideoTracks--;
      }
    }

var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
        pc._sdpSessionVersion++);
    pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
      // For each track, create an ice gatherer, ice transport,
      // dtls transport, potentially rtpsender and rtpreceiver.
      var track = transceiver.track;
      var kind = transceiver.kind;
      var mid = transceiver.mid || SDPUtils.generateIdentifier();
      transceiver.mid = mid;

if (!transceiver.iceGatherer) {
        transceiver.iceGatherer = pc._createIceGatherer(sdpMLineIndex,
            pc.usingBundle);
      }

// for subsequent offers, we might have to re-use the payload
        // type of the last offer.
        if (transceiver.remoteCapabilities &&
            transceiver.remoteCapabilities.codecs) {
          transceiver.remoteCapabilities.codecs.forEach(function(remoteCodec) {
            if (codec.name.toLowerCase() === remoteCodec.name.toLowerCase() &&
                codec.clockRate === remoteCodec.clockRate) {
              codec.preferredPayloadType = remoteCodec.payloadType;
            }
          });
        }
      });
      localCapabilities.headerExtensions.forEach(function(hdrExt) {
        var remoteExtensions = transceiver.remoteCapabilities &&
            transceiver.remoteCapabilities.headerExtensions || [];
        remoteExtensions.forEach(function(rHdrExt) {
          if (hdrExt.uri === rHdrExt.uri) {
            hdrExt.id = rHdrExt.id;
          }
        });
      });

// generate an ssrc now, to be used later in rtpSender.send
      var sendEncodingParameters = transceiver.sendEncodingParameters || [{
        ssrc: (2 * sdpMLineIndex + 1) * 1001
      }];
      if (track) {
        // add RTX
        if (edgeVersion >= 15019 && kind === 'video' &&
            !sendEncodingParameters[0].rtx) {
          sendEncodingParameters[0].rtx = {
            ssrc: sendEncodingParameters[0].ssrc + 1
          };
        }
      }

if (transceiver.wantReceive) {
        transceiver.rtpReceiver = new window.RTCRtpReceiver(
            transceiver.dtlsTransport, kind);
      }

transceiver.localCapabilities = localCapabilities;
      transceiver.sendEncodingParameters = sendEncodingParameters;
    });

// always offer BUNDLE and dispose on return if not supported.
    if (pc._config.bundlePolicy !== 'max-compat') {
      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
        return t.mid;
      }).join(' ') + '\r\n';
    }
    sdp += 'a=ice-options:trickle\r\n';

pc.transceivers.forEach(function(transceiver, sdpMLineIndex) {
      sdp += writeMediaSection(transceiver, transceiver.localCapabilities,
          'offer', transceiver.stream, pc._dtlsRole);
      sdp += 'a=rtcp-rsize\r\n';

if (transceiver.iceGatherer && pc.iceGatheringState !== 'new' &&
          (sdpMLineIndex === 0 || !pc.usingBundle)) {
        transceiver.iceGatherer.getLocalCandidates().forEach(function(cand) {
          cand.component = 1;
          sdp += 'a=' + SDPUtils.writeCandidate(cand) + '\r\n';
        });

if (transceiver.iceGatherer.state === 'completed') {
          sdp += 'a=end-of-candidates\r\n';
        }
      }
    });

var desc = new window.RTCSessionDescription({
      type: 'offer',
      sdp: sdp
    });
    return Promise.resolve(desc);
  };

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

if (pc._isClosed) {
      return Promise.reject(makeError('InvalidStateError',
          'Can not call createAnswer after close'));
    }

if (!(pc.signalingState === 'have-remote-offer' ||
        pc.signalingState === 'have-local-pranswer')) {
      return Promise.reject(makeError('InvalidStateError',
          'Can not call createAnswer in signalingState ' + pc.signalingState));
    }

var sdp = SDPUtils.writeSessionBoilerplate(pc._sdpSessionId,
        pc._sdpSessionVersion++);
    if (pc.usingBundle) {
      sdp += 'a=group:BUNDLE ' + pc.transceivers.map(function(t) {
        return t.mid;
      }).join(' ') + '\r\n';
    }
    sdp += 'a=ice-options:trickle\r\n';

// FIXME: look at direction.
      if (transceiver.stream) {
        var localTrack;
        if (transceiver.kind === 'audio') {
          localTrack = transceiver.stream.getAudioTracks()[0];
        } else if (transceiver.kind === 'video') {
          localTrack = transceiver.stream.getVideoTracks()[0];
        }
        if (localTrack) {
          // add RTX
          if (edgeVersion >= 15019 && transceiver.kind === 'video' &&
              !transceiver.sendEncodingParameters[0].rtx) {
            transceiver.sendEncodingParameters[0].rtx = {
              ssrc: transceiver.sendEncodingParameters[0].ssrc + 1
            };
          }
        }
      }

// Calculate intersection of capabilities.
      var commonCapabilities = getCommonCapabilities(
          transceiver.localCapabilities,
          transceiver.remoteCapabilities);

var hasRtx = commonCapabilities.codecs.filter(function(c) {
        return c.name.toLowerCase() === 'rtx';
      }).length;
      if (!hasRtx && transceiver.sendEncodingParameters[0].rtx) {
        delete transceiver.sendEncodingParameters[0].rtx;
      }

sdp += writeMediaSection(transceiver, commonCapabilities,
          'answer', transceiver.stream, pc._dtlsRole);
      if (transceiver.rtcpParameters &&
          transceiver.rtcpParameters.reducedSize) {
        sdp += 'a=rtcp-rsize\r\n';
      }
    });

var desc = new window.RTCSessionDescription({
      type: 'answer',
      sdp: sdp
    });
    return Promise.resolve(desc);
  };

RTCPeerConnection.prototype.addIceCandidate = function(candidate) {
    var pc = this;
    var sections;
    if (candidate && !(candidate.sdpMLineIndex !== undefined ||
        candidate.sdpMid)) {
      return Promise.reject(new TypeError('sdpMLineIndex or sdpMid required'));
    }

// TODO: needs to go into ops queue.
    return new Promise(function(resolve, reject) {
      if (!pc._remoteDescription) {
        return reject(makeError('InvalidStateError',
            'Can not add ICE candidate without a remote description'));
      } else if (!candidate || candidate.candidate === '') {
        for (var j = 0; j < pc.transceivers.length; j++) {
          if (pc.transceivers[j].rejected) {
            continue;
          }
          pc.transceivers[j].iceTransport.addRemoteCandidate({});
          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
          sections[j] += 'a=end-of-candidates\r\n';
          pc._remoteDescription.sdp =
              SDPUtils.getDescription(pc._remoteDescription.sdp) +
              sections.join('');
          if (pc.usingBundle) {
            break;
          }
        }
      } else {
        var sdpMLineIndex = candidate.sdpMLineIndex;
        if (candidate.sdpMid) {
          for (var i = 0; i < pc.transceivers.length; i++) {
            if (pc.transceivers[i].mid === candidate.sdpMid) {
              sdpMLineIndex = i;
              break;
            }
          }
        }
        var transceiver = pc.transceivers[sdpMLineIndex];
        if (transceiver) {
          if (transceiver.rejected) {
            return resolve();
          }
          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 resolve();
          }
          // Ignore RTCP candidates, we assume RTCP-MUX.
          if (cand.component && cand.component !== 1) {
            return resolve();
          }
          // when using bundle, avoid adding candidates to the wrong
          // ice transport. And avoid adding candidates added in the SDP.
          if (sdpMLineIndex === 0 || (sdpMLineIndex > 0 &&
              transceiver.iceTransport !== pc.transceivers[0].iceTransport)) {
            if (!maybeAddCandidate(transceiver.iceTransport, cand)) {
              return reject(makeError('OperationError',
                  'Can not add ICE candidate'));
            }
          }

// update the remoteDescription.
          var candidateString = candidate.candidate.trim();
          if (candidateString.indexOf('a=') === 0) {
            candidateString = candidateString.substr(2);
          }
          sections = SDPUtils.getMediaSections(pc._remoteDescription.sdp);
          sections[sdpMLineIndex] += 'a=' +
              (cand.type ? candidateString : 'end-of-candidates')
              + '\r\n';
          pc._remoteDescription.sdp =
              SDPUtils.getDescription(pc._remoteDescription.sdp) +
              sections.join('');
        } else {
          return reject(makeError('OperationError',
              'Can not add ICE candidate'));
        }
      }
      resolve();
    });
  };

RTCPeerConnection.prototype.getStats = function(selector) {
    if (selector && selector instanceof window.MediaStreamTrack) {
      var senderOrReceiver = null;
      this.transceivers.forEach(function(transceiver) {
        if (transceiver.rtpSender &&
            transceiver.rtpSender.track === selector) {
          senderOrReceiver = transceiver.rtpSender;
        } else if (transceiver.rtpReceiver &&
            transceiver.rtpReceiver.track === selector) {
          senderOrReceiver = transceiver.rtpReceiver;
        }
      });
      if (!senderOrReceiver) {
        throw makeError('InvalidAccessError', 'Invalid selector.');
      }
      return senderOrReceiver.getStats();
    }

// fix low-level stat names and return Map instead of object.
  var ortcObjects = ['RTCRtpSender', 'RTCRtpReceiver', 'RTCIceGatherer',
    'RTCIceTransport', 'RTCDtlsTransport'];
  ortcObjects.forEach(function(ortcObjectName) {
    var obj = window[ortcObjectName];
    if (obj && obj.prototype && obj.prototype.getStats) {
      var nativeGetstats = obj.prototype.getStats;
      obj.prototype.getStats = function() {
        return nativeGetstats.apply(this)
        .then(function(nativeStats) {
          var mapStats = new Map();
          Object.keys(nativeStats).forEach(function(id) {
            nativeStats[id].type = fixStatsType(nativeStats[id]);
            mapStats.set(id, nativeStats[id]);
          });
          return mapStats;
        });
      };
    }
  });

// legacy callback shims. Should be moved to adapter.js some days.
  var methods = ['createOffer', 'createAnswer'];
  methods.forEach(function(method) {
    var nativeMethod = RTCPeerConnection.prototype[method];
    RTCPeerConnection.prototype[method] = function() {
      var args = arguments;
      if (typeof args[0] === 'function' ||
          typeof args[1] === 'function') { // legacy
        return nativeMethod.apply(this, [arguments[2]])
        .then(function(description) {
          if (typeof args[0] === 'function') {
            args[0].apply(null, [description]);
          }
        }, function(error) {
          if (typeof args[1] === 'function') {
            args[1].apply(null, [error]);
          }
        });
      }
      return nativeMethod.apply(this, arguments);
    };
  });

methods = ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate'];
  methods.forEach(function(method) {
    var nativeMethod = RTCPeerConnection.prototype[method];
    RTCPeerConnection.prototype[method] = function() {
      var args = arguments;
      if (typeof args[1] === 'function' ||
          typeof args[2] === 'function') { // legacy
        return nativeMethod.apply(this, arguments)
        .then(function() {
          if (typeof args[1] === 'function') {
            args[1].apply(null);
          }
        }, function(error) {
          if (typeof args[2] === 'function') {
            args[2].apply(null, [error]);
          }
        });
      }
      return nativeMethod.apply(this, arguments);
    };
  });

// getStats is special. It doesn't have a spec legacy method yet we support
  // getStats(something, cb) without error callbacks.
  ['getStats'].forEach(function(method) {
    var nativeMethod = RTCPeerConnection.prototype[method];
    RTCPeerConnection.prototype[method] = function() {
      var args = arguments;
      if (typeof args[1] === 'function') {
        return nativeMethod.apply(this, arguments)
        .then(function() {
          if (typeof args[1] === 'function') {
            args[1].apply(null);
          }
        });
      }
      return nativeMethod.apply(this, arguments);
    };
  });

return RTCPeerConnection;
};

},{"sdp":17}],17:[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 the session description.
SDPUtils.getDescription = function(blob) {
  var sections = SDPUtils.splitSections(blob);
  return sections && sections[0];
};

// returns the individual media sections.
SDPUtils.getMediaSections = function(blob) {
  var sections = SDPUtils.splitSections(blob);
  sections.shift();
  return sections;
};

// Returns lines that start with a certain prefix.
SDPUtils.matchPrefix = function(blob, prefix) {
  return SDPUtils.splitLines(blob).filter(function(line) {
    return line.indexOf(prefix) === 0;
  });
};

// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
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: parseInt(parts[1], 10),
    protocol: parts[2].toLowerCase(),
    priority: parseInt(parts[3], 10),
    ip: parts[4],
    address: parts[4], // address is an alias for ip.
    port: parseInt(parts[5], 10),
    // skip parts[6] == 'typ'
    type: parts[7]
  };

for (var i = 8; i < parts.length; i += 2) {
    switch (parts[i]) {
      case 'raddr':
        candidate.relatedAddress = parts[i + 1];
        break;
      case 'rport':
        candidate.relatedPort = parseInt(parts[i + 1], 10);
        break;
      case 'tcptype':
        candidate.tcpType = parts[i + 1];
        break;
      case 'ufrag':
        candidate.ufrag = parts[i + 1]; // for backward compability.
        candidate.usernameFragment = parts[i + 1];
        break;
      default: // extension handling, in particular ufrag
        candidate[parts[i]] = parts[i + 1];
        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.address || candidate.ip);
  sdp.push(candidate.port);

// Parses an ice-options line, returns an array of option tags.
// a=ice-options:foo bar
SDPUtils.parseIceOptions = function(line) {
  return line.substr(14).split(' ');
};

// 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
  parsed.channels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
  // legacy alias, got renamed back to channels in ORTC.
  parsed.numChannels = parsed.channels;
  return parsed;
};

// Generate an a=rtpmap line from RTCRtpCodecCapability or
// RTCRtpCodecParameters.
SDPUtils.writeRtpMap = function(codec) {
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  var channels = codec.channels || codec.numChannels || 1;
  return 'a=rtpmap:' + pt + ' ' + codec.name + '/' + codec.clockRate +
      (channels !== 1 ? '/' + channels : '') + '\r\n';
};

// Parses an a=extmap line (headerextension from RFC 5285). Sample input:
// a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
// a=extmap:2/sendonly urn:ietf:params:rtp-hdrext:toffset
SDPUtils.parseExtmap = function(line) {
  var parts = line.substr(9).split(' ');
  return {
    id: parseInt(parts[0], 10),
    direction: parts[0].indexOf('/') > 0 ? parts[0].split('/')[1] : 'sendrecv',
    uri: parts[1]
  };
};

// Generates a=extmap line from RTCRtpHeaderExtensionParameters or
// RTCRtpHeaderExtension.
SDPUtils.writeExtmap = function(headerExtension) {
  return 'a=extmap:' + (headerExtension.id || headerExtension.preferredId) +
      (headerExtension.direction && headerExtension.direction !== 'sendrecv'
        ? '/' + headerExtension.direction
        : '') +
      ' ' + headerExtension.uri + '\r\n';
};

// Parses 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) {
      if (codec.parameters[param]) {
        params.push(param + '=' + codec.parameters[param]);
      } else {
        params.push(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;
};

SDPUtils.parseSsrcGroup = function(line) {
  var parts = line.substr(13).split(' ');
  return {
    semantics: parts.shift(),
    ssrcs: parts.map(function(ssrc) {
      return parseInt(ssrc, 10);
    })
  };
};

// Extracts the MID (RFC 5888) from a media section.
// returns the MID or undefined if no mid line was found.
SDPUtils.getMid = function(mediaSection) {
  var mid = SDPUtils.matchPrefix(mediaSection, 'a=mid:')[0];
  if (mid) {
    return mid.substr(6);
  }
};

SDPUtils.parseFingerprint = function(line) {
  var parts = line.substr(14).split(' ');
  return {
    algorithm: parts[0].toLowerCase(), // algorithm is case-sensitive in Edge.
    value: parts[1]
  };
};

// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the fingerprint line as input. See also getIceParameters.
SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
    'a=fingerprint:');
  // Note: a=setup line is ignored since we use the 'auto' role.
  // Note2: 'algorithm' is not case sensitive except in Edge.
  return {
    role: 'auto',
    fingerprints: lines.map(SDPUtils.parseFingerprint)
  };
};

// Serializes DTLS parameters to SDP.
SDPUtils.writeDtlsParameters = function(params, setupType) {
  var sdp = 'a=setup:' + setupType + '\r\n';
  params.fingerprints.forEach(function(fp) {
    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
  });
  return sdp;
};

// Parses a=crypto lines into
//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#dictionary-rtcsrtpsdesparameters-members
SDPUtils.parseCryptoLine = function(line) {
  var parts = line.substr(9).split(' ');
  return {
    tag: parseInt(parts[0], 10),
    cryptoSuite: parts[1],
    keyParams: parts[2],
    sessionParams: parts.slice(3),
  };
};

SDPUtils.writeCryptoLine = function(parameters) {
  return 'a=crypto:' + parameters.tag + ' ' +
    parameters.cryptoSuite + ' ' +
    (typeof parameters.keyParams === 'object'
      ? SDPUtils.writeCryptoKeyParams(parameters.keyParams)
      : parameters.keyParams) +
    (parameters.sessionParams ? ' ' + parameters.sessionParams.join(' ') : '') +
    '\r\n';
};

// Parses the crypto key parameters into
//   https://rawgit.com/aboba/edgertc/master/msortc-rs4.html#rtcsrtpkeyparam*
SDPUtils.parseCryptoKeyParams = function(keyParams) {
  if (keyParams.indexOf('inline:') !== 0) {
    return null;
  }
  var parts = keyParams.substr(7).split('|');
  return {
    keyMethod: 'inline',
    keySalt: parts[0],
    lifeTime: parts[1],
    mkiValue: parts[2] ? parts[2].split(':')[0] : undefined,
    mkiLength: parts[2] ? parts[2].split(':')[1] : undefined,
  };
};

SDPUtils.writeCryptoKeyParams = function(keyParams) {
  return keyParams.keyMethod + ':'
    + keyParams.keySalt +
    (keyParams.lifeTime ? '|' + keyParams.lifeTime : '') +
    (keyParams.mkiValue && keyParams.mkiLength
      ? '|' + keyParams.mkiValue + ':' + keyParams.mkiLength
      : '');
};

// Extracts all SDES paramters.
SDPUtils.getCryptoParameters = function(mediaSection, sessionpart) {
  var lines = SDPUtils.matchPrefix(mediaSection + sessionpart,
    'a=crypto:');
  return lines.map(SDPUtils.parseCryptoLine);
};

// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the ice-ufrag and ice-pwd lines as input.
SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
  var ufrag = SDPUtils.matchPrefix(mediaSection + sessionpart,
    'a=ice-ufrag:')[0];
  var pwd = SDPUtils.matchPrefix(mediaSection + sessionpart,
    'a=ice-pwd:')[0];
  if (!(ufrag && pwd)) {
    return null;
  }
  return {
    usernameFragment: ufrag.substr(12),
    password: pwd.substr(10),
  };
};

// Serializes ICE parameters to SDP.
SDPUtils.writeIceParameters = function(params) {
  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';

if (caps.headerExtensions) {
    caps.headerExtensions.forEach(function(extension) {
      sdp += SDPUtils.writeExtmap(extension);
    });
  }
  // FIXME: write fecMechanisms.
  return sdp;
};

// Parses the SDP media section and returns an array of
// RTCRtpEncodingParameters.
SDPUtils.parseRtpEncodingParameters = function(mediaSection) {
  var encodingParameters = [];
  var description = SDPUtils.parseRtpParameters(mediaSection);
  var hasRed = description.fecMechanisms.indexOf('RED') !== -1;
  var hasUlpfec = description.fecMechanisms.indexOf('ULPFEC') !== -1;

// filter a=ssrc:... cname:, ignore PlanB-msid
  var ssrcs = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
    .map(function(line) {
      return SDPUtils.parseSsrcMedia(line);
    })
    .filter(function(parts) {
      return parts.attribute === 'cname';
    });
  var primarySsrc = ssrcs.length > 0 && ssrcs[0].ssrc;
  var secondarySsrc;

description.codecs.forEach(function(codec) {
    if (codec.name.toUpperCase() === 'RTX' && codec.parameters.apt) {
      var encParam = {
        ssrc: primarySsrc,
        codecPayloadType: parseInt(codec.parameters.apt, 10)
      };
      if (primarySsrc && secondarySsrc) {
        encParam.rtx = {ssrc: secondarySsrc};
      }
      encodingParameters.push(encParam);
      if (hasRed) {
        encParam = JSON.parse(JSON.stringify(encParam));
        encParam.fec = {
          ssrc: primarySsrc,
          mechanism: hasUlpfec ? 'red+ulpfec' : 'red'
        };
        encodingParameters.push(encParam);
      }
    }
  });
  if (encodingParameters.length === 0 && primarySsrc) {
    encodingParameters.push({
      ssrc: primarySsrc
    });
  }

// we support both b=AS and b=TIAS but interpret AS as TIAS.
  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
  if (bandwidth.length) {
    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
      bandwidth = parseInt(bandwidth[0].substr(7), 10);
    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
      // use formula from JSEP to convert b=AS to TIAS value.
      bandwidth = parseInt(bandwidth[0].substr(5), 10) * 1000 * 0.95
          - (50 * 40 * 8);
    } else {
      bandwidth = undefined;
    }
    encodingParameters.forEach(function(params) {
      params.maxBitrate = bandwidth;
    });
  }
  return encodingParameters;
};

// parses http://draft.ortc.org/#rtcrtcpparameters*
SDPUtils.parseRtcpParameters = function(mediaSection) {
  var rtcpParameters = {};

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

// Edge uses the compound attribute instead of reducedSize
  // compound is !reducedSize
  var rsize = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-rsize');
  rtcpParameters.reducedSize = rsize.length > 0;
  rtcpParameters.compound = rsize.length === 0;

// parses the rtcp-mux attrіbute.
  // Note that Edge does not support unmuxed RTCP.
  var mux = SDPUtils.matchPrefix(mediaSection, 'a=rtcp-mux');
  rtcpParameters.mux = mux.length > 0;

return rtcpParameters;
};

// parses either a=msid: or a=ssrc:... msid lines and returns
// the id of the MediaStream and MediaStreamTrack.
SDPUtils.parseMsid = function(mediaSection) {
  var parts;
  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
  if (spec.length === 1) {
    parts = spec[0].substr(7).split(' ');
    return {stream: parts[0], track: parts[1]};
  }
  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
    .map(function(line) {
      return SDPUtils.parseSsrcMedia(line);
    })
    .filter(function(msidParts) {
      return msidParts.attribute === 'msid';
    });
  if (planB.length > 0) {
    parts = planB[0].value.split(' ');
    return {stream: parts[0], track: parts[1]};
  }
};

// SCTP
// parses draft-ietf-mmusic-sctp-sdp-26 first and falls back
// to draft-ietf-mmusic-sctp-sdp-05
SDPUtils.parseSctpDescription = function(mediaSection) {
  var mline = SDPUtils.parseMLine(mediaSection);
  var maxSizeLine = SDPUtils.matchPrefix(mediaSection, 'a=max-message-size:');
  var maxMessageSize;
  if (maxSizeLine.length > 0) {
    maxMessageSize = parseInt(maxSizeLine[0].substr(19), 10);
  }
  if (isNaN(maxMessageSize)) {
    maxMessageSize = 65536;
  }
  var sctpPort = SDPUtils.matchPrefix(mediaSection, 'a=sctp-port:');
  if (sctpPort.length > 0) {
    return {
      port: parseInt(sctpPort[0].substr(12), 10),
      protocol: mline.fmt,
      maxMessageSize: maxMessageSize
    };
  }
  var sctpMapLines = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:');
  if (sctpMapLines.length > 0) {
    var parts = SDPUtils.matchPrefix(mediaSection, 'a=sctpmap:')[0]
      .substr(10)
      .split(' ');
    return {
      port: parseInt(parts[0], 10),
      protocol: parts[1],
      maxMessageSize: maxMessageSize
    };
  }
};

// SCTP
// outputs the draft-ietf-mmusic-sctp-sdp-26 version that all browsers
// support by now receiving in this format, unless we originally parsed
// as the draft-ietf-mmusic-sctp-sdp-05 format (indicated by the m-line
// protocol of DTLS/SCTP -- without UDP/ or TCP/)
SDPUtils.writeSctpDescription = function(media, sctp) {
  var output = [];
  if (media.protocol !== 'DTLS/SCTP') {
    output = [
      'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.protocol + '\r\n',
      'c=IN IP4 0.0.0.0\r\n',
      'a=sctp-port:' + sctp.port + '\r\n'
    ];
  } else {
    output = [
      'm=' + media.kind + ' 9 ' + media.protocol + ' ' + sctp.port + '\r\n',
      'c=IN IP4 0.0.0.0\r\n',
      'a=sctpmap:' + sctp.port + ' ' + sctp.protocol + ' 65535\r\n'
    ];
  }
  if (sctp.maxMessageSize !== undefined) {
    output.push('a=max-message-size:' + sctp.maxMessageSize + '\r\n');
  }
  return output.join('');
};

// Generate a session ID for SDP.
// https://tools.ietf.org/html/draft-ietf-rtcweb-jsep-20#section-5.2.1
// recommends using a cryptographically random +ve 64-bit value
// but right now this should be acceptable and within the right range
SDPUtils.generateSessionId = function() {
  return Math.random().toString().substr(2, 21);
};

// Write boilder plate for start of SDP
// sessId argument is optional - if not supplied it will
// be generated randomly
// sessVersion is optional and defaults to 2
// sessUser is optional and defaults to 'thisisadapterortc'
SDPUtils.writeSessionBoilerplate = function(sessId, sessVer, sessUser) {
  var sessionId;
  var version = sessVer !== undefined ? sessVer : 2;
  if (sessId) {
    sessionId = sessId;
  } else {
    sessionId = SDPUtils.generateSessionId();
  }
  var user = sessUser || 'thisisadapterortc';
  // FIXME: sess-id should be an NTP timestamp.
  return 'v=0\r\n' +
      'o=' + user + ' ' + sessionId + ' ' + version +
        ' IN IP4 127.0.0.1\r\n' +
      's=-\r\n' +
      't=0 0\r\n';
};

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.direction) {
    sdp += 'a=' + transceiver.direction + '\r\n';
  } else 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';
  }

if (transceiver.rtpSender) {
    // spec.
    var msid = 'msid:' + stream.id + ' ' +
        transceiver.rtpSender.track.id + '\r\n';
    sdp += 'a=' + msid;

// for Chrome.
    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';
};

SDPUtils.getKind = function(mediaSection) {
  var lines = SDPUtils.splitLines(mediaSection);
  var mline = lines[0].split(' ');
  return mline[0].substr(2);
};

SDPUtils.isRejected = function(mediaSection) {
  return mediaSection.split(' ', 2)[1] === '0';
};

SDPUtils.parseMLine = function(mediaSection) {
  var lines = SDPUtils.splitLines(mediaSection);
  var parts = lines[0].substr(2).split(' ');
  return {
    kind: parts[0],
    port: parseInt(parts[1], 10),
    protocol: parts[2],
    fmt: parts.slice(3).join(' ')
  };
};

SDPUtils.parseOLine = function(mediaSection) {
  var line = SDPUtils.matchPrefix(mediaSection, 'o=')[0];
  var parts = line.substr(2).split(' ');
  return {
    username: parts[0],
    sessionId: parts[1],
    sessionVersion: parseInt(parts[2], 10),
    netType: parts[3],
    addressType: parts[4],
    address: parts[5]
  };
};

// a very naive interpretation of a valid SDP.
SDPUtils.isValidSDP = function(blob) {
  if (typeof blob !== 'string' || blob.length === 0) {
    return false;
  }
  var lines = SDPUtils.splitLines(blob);
  for (var i = 0; i < lines.length; i++) {
    if (lines[i].length < 2 || lines[i].charAt(1) !== '=') {
      return false;
    }
    // TODO: check the modifier a bit more.
  }
  return true;
};

// Expose public methods.
if (typeof module === 'object') {
  module.exports = SDPUtils;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

handler = events[type];

if (!handler)
    return false;

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

return true;
};

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

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

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

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

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

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

return target;
}

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

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

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

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

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

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

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

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

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

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

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

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

if (position < 0)
          return this;

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

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

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

return this;
    };

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

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

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

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

listeners = events[type];

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

return this;
    };

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

if (!events)
    return [];

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

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

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

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

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

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

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

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

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

return 0;
}

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

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

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

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

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

var normalice = require('normalice');

/**
  # freeice

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

## Example Use

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

<<< examples/quickconnect.js

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

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

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

## Please add my server!

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

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

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

## Current List of Servers

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

### STUN

<<< stun.json

### TURN

<<< turn.json

**/

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

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

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

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

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

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

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

return selected;
};

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

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

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

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

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

return maxVolume;
}

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

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

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

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

var sourceNode, fftBins, analyser;

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

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

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

harker.speaking = false;

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

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

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

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

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

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

var currentVolume = getMaxVolume(analyser, fftBins);

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

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

return harker;
}

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

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

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

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

;(function(isNode) {

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

var Public = function(clone) {

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

}, publicName = 'merge';

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

Public.recursive = function(clone) {

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

};

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

Public.clone = function(input) {

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

if (type === 'array') {

output = [];
			size = input.length;

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

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

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

output = {};

for (index in input)

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

}

return output;

};

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

function merge_recursive(base, extend) {

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

return extend;

for (var key in extend) {

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

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

} else {

base[key] = extend[key];

}

return base;

}

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

function merge(clone, recursive, argv) {

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

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

result = {};

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

var item = argv[index],

type = typeOf(item);

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

for (var key in item) {

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

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

if (recursive) {

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

} else {

result[key] = sitem;

}

return result;

}

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

function typeOf(input) {

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

}

if (isNode) {

module.exports = Public;

} else {

window[publicName] = Public;

}

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

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

## Example Usage

<<< examples/simple.js

**/

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

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

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

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

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

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

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

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

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

return output;
};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

function Interop() {

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

module.exports = Interop;

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

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

return cand;
};

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

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

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

return cand;
};

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

return null;
};

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

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

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

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

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

//#endregion

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

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

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

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

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

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

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

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

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

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

});

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

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

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

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

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

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

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

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

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

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

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

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

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

var resStr = transform.write(session);

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

//#endregion
};

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

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

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

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

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

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

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

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

if (!hasBundle) {
        var mustBeBundle = false;

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

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

//#endregion

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

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

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

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

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

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

var sources2ul = {};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

mid2ul[uLine.mid] = uLine;

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

bIdx++;
    });

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

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

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

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

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

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

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

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

session.media.push(uLine);

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

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

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

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

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

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

var done = false;

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

done = true;
                            return true;
                        }
                    });

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

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

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

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

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

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

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

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

var resStr = transform.write(session);

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

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

//#endregion
};

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

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

exports.write = function(session, opts) {

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

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

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

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

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

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

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

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

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

delete mLine.ssrcs;
      }

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

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

return session;
};

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

(function (window, undefined) {

'use strict';

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

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

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

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

var mapper = {

rgx : function (ua, arrays) {

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

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

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

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

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

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

str : function (str, map) {

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

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

var maps = {

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

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

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

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

var regexes = {

browser : [[

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

cpu : [[

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

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

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

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

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

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

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

device : [[

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

engine : [[

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

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

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

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

os : [[

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

module.exports = bytesToUuid;

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

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

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

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

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

return rnds;
  };
}

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

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

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

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

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

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

return buf || bytesToUuid(rnds);
}

module.exports = v4;

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

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

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

});

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

});

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

module.exports = WildEmitter;

function WildEmitter() { }

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

prototype.isWildEmitter= true;

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

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

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

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

if (!callbacks) return this;

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

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

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

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

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

return this;
    };

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

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

};

WildEmitter.mixin(WildEmitter);

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