rtcpeerconnection.bundle.js

!function(e){"object"==typeof exports?module.exports=e():"function"==typeof define&&define.amd?define(e):"undefined"!=typeof window?window.PeerConnection=e():"undefined"!=typeof global?global.PeerConnection=e():"undefined"!=typeof self&&(self.PeerConnection=e())}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){


//
// The shims in this file are not fully implemented shims for the ES5
// features, but do work for the particular usecases there is in
// the other modules.
//

var toString = Object.prototype.toString;
var hasOwnProperty = Object.prototype.hasOwnProperty;

// Array.isArray is supported in IE9
function isArray(xs) {
  return toString.call(xs) === '[object Array]';
}
exports.isArray = typeof Array.isArray === 'function' ? Array.isArray : isArray;

// Array.prototype.indexOf is supported in IE9
exports.indexOf = function indexOf(xs, x) {
  if (xs.indexOf) return xs.indexOf(x);
  for (var i = 0; i < xs.length; i++) {
    if (x === xs[i]) return i;
  }
  return -1;
};

// Array.prototype.filter is supported in IE9
exports.filter = function filter(xs, fn) {
  if (xs.filter) return xs.filter(fn);
  var res = [];
  for (var i = 0; i < xs.length; i++) {
    if (fn(xs[i], i, xs)) res.push(xs[i]);
  }
  return res;
};

// Array.prototype.forEach is supported in IE9
exports.forEach = function forEach(xs, fn, self) {
  if (xs.forEach) return xs.forEach(fn, self);
  for (var i = 0; i < xs.length; i++) {
    fn.call(self, xs[i], i, xs);
  }
};

// Array.prototype.map is supported in IE9
exports.map = function map(xs, fn) {
  if (xs.map) return xs.map(fn);
  var out = new Array(xs.length);
  for (var i = 0; i < xs.length; i++) {
    out[i] = fn(xs[i], i, xs);
  }
  return out;
};

// Array.prototype.reduce is supported in IE9
exports.reduce = function reduce(array, callback, opt_initialValue) {
  if (array.reduce) return array.reduce(callback, opt_initialValue);
  var value, isValueSet = false;

  if (2 < arguments.length) {
    value = opt_initialValue;
    isValueSet = true;
  }
  for (var i = 0, l = array.length; l > i; ++i) {
    if (array.hasOwnProperty(i)) {
      if (isValueSet) {
        value = callback(value, array[i], i, array);
      }
      else {
        value = array[i];
        isValueSet = true;
      }
    }
  }

  return value;
};

// String.prototype.substr - negative index don't work in IE8
if ('ab'.substr(-1) !== 'b') {
  exports.substr = function (str, start, length) {
    // did we get a negative start, calculate how much it is from the beginning of the string
    if (start < 0) start = str.length + start;

    // call the original function
    return str.substr(start, length);
  };
} else {
  exports.substr = function (str, start, length) {
    return str.substr(start, length);
  };
}

// String.prototype.trim is supported in IE9
exports.trim = function (str) {
  if (str.trim) return str.trim();
  return str.replace(/^\s+|\s+$/g, '');
};

// Function.prototype.bind is supported in IE9
exports.bind = function () {
  var args = Array.prototype.slice.call(arguments);
  var fn = args.shift();
  if (fn.bind) return fn.bind.apply(fn, args);
  var self = args.shift();
  return function () {
    fn.apply(self, args.concat([Array.prototype.slice.call(arguments)]));
  };
};

// Object.create is supported in IE9
function create(prototype, properties) {
  var object;
  if (prototype === null) {
    object = { '__proto__' : null };
  }
  else {
    if (typeof prototype !== 'object') {
      throw new TypeError(
        'typeof prototype[' + (typeof prototype) + '] != \'object\''
      );
    }
    var Type = function () {};
    Type.prototype = prototype;
    object = new Type();
    object.__proto__ = prototype;
  }
  if (typeof properties !== 'undefined' && Object.defineProperties) {
    Object.defineProperties(object, properties);
  }
  return object;
}
exports.create = typeof Object.create === 'function' ? Object.create : create;

// Object.keys and Object.getOwnPropertyNames is supported in IE9 however
// they do show a description and number property on Error objects
function notObject(object) {
  return ((typeof object != "object" && typeof object != "function") || object === null);
}

function keysShim(object) {
  if (notObject(object)) {
    throw new TypeError("Object.keys called on a non-object");
  }

  var result = [];
  for (var name in object) {
    if (hasOwnProperty.call(object, name)) {
      result.push(name);
    }
  }
  return result;
}

// getOwnPropertyNames is almost the same as Object.keys one key feature
//  is that it returns hidden properties, since that can't be implemented,
//  this feature gets reduced so it just shows the length property on arrays
function propertyShim(object) {
  if (notObject(object)) {
    throw new TypeError("Object.getOwnPropertyNames called on a non-object");
  }

  var result = keysShim(object);
  if (exports.isArray(object) && exports.indexOf(object, 'length') === -1) {
    result.push('length');
  }
  return result;
}

var keys = typeof Object.keys === 'function' ? Object.keys : keysShim;
var getOwnPropertyNames = typeof Object.getOwnPropertyNames === 'function' ?
  Object.getOwnPropertyNames : propertyShim;

if (new Error().hasOwnProperty('description')) {
  var ERROR_PROPERTY_FILTER = function (obj, array) {
    if (toString.call(obj) === '[object Error]') {
      array = exports.filter(array, function (name) {
        return name !== 'description' && name !== 'number' && name !== 'message';
      });
    }
    return array;
  };

  exports.keys = function (object) {
    return ERROR_PROPERTY_FILTER(object, keys(object));
  };
  exports.getOwnPropertyNames = function (object) {
    return ERROR_PROPERTY_FILTER(object, getOwnPropertyNames(object));
  };
} else {
  exports.keys = keys;
  exports.getOwnPropertyNames = getOwnPropertyNames;
}

// Object.getOwnPropertyDescriptor - supported in IE8 but only on dom elements
function valueObject(value, key) {
  return { value: value[key] };
}

if (typeof Object.getOwnPropertyDescriptor === 'function') {
  try {
    Object.getOwnPropertyDescriptor({'a': 1}, 'a');
    exports.getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
  } catch (e) {
    // IE8 dom element issue - use a try catch and default to valueObject
    exports.getOwnPropertyDescriptor = function (value, key) {
      try {
        return Object.getOwnPropertyDescriptor(value, key);
      } catch (e) {
        return valueObject(value, key);
      }
    };
  }
} else {
  exports.getOwnPropertyDescriptor = valueObject;
}

},{}],2:[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 shims = require('_shims');

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (!isString(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
};

/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    exports._extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}
exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  shims.forEach(array, function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes);
    if (!isString(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = shims.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = shims.getOwnPropertyNames(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }

  shims.forEach(keys, function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = shims.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }

  if (!hasOwnProperty(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (shims.indexOf(ctx.seen, desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var numLinesEst = 0;
  var length = shims.reduce(output, function(prev, cur) {
    numLinesEst++;
    if (cur.indexOf('\n') >= 0) numLinesEst++;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return shims.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) && objectToString(e) === '[object Error]';
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

function isBuffer(arg) {
  return arg && typeof arg === 'object'
    && typeof arg.copy === 'function'
    && typeof arg.fill === 'function'
    && typeof arg.binarySlice === 'function'
  ;
}
exports.isBuffer = isBuffer;

function objectToString(o) {
  return Object.prototype.toString.call(o);
}


function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
exports.log = function() {
  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
};


/**
 * Inherit the prototype methods from one constructor into another.
 *
 * The Function.prototype.inherits from lang.js rewritten as a standalone
 * function (not on Function.prototype). NOTE: If this file is to be loaded
 * during bootstrapping this function needs to be rewritten using some native
 * functions as prototype setup using normal JavaScript does not work as
 * expected during bootstrapping (see mirror.js in r114903).
 *
 * @param {function} ctor Constructor function which needs to inherit the
 *     prototype.
 * @param {function} superCtor Constructor function to inherit prototype from.
 */
exports.inherits = function(ctor, superCtor) {
  ctor.super_ = superCtor;
  ctor.prototype = shims.create(superCtor.prototype, {
    constructor: {
      value: ctor,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });
};

exports._extend = function(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject(add)) return origin;

  var keys = shims.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
};

function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

},{"_shims":1}],3:[function(require,module,exports){
var toSDP = require('./lib/tosdp');
var toJSON = require('./lib/tojson');


// Converstion from JSON to SDP

exports.toIncomingSDPOffer = function (session) {
    return toSDP.toSessionSDP(session, {
        role: 'responder',
        direction: 'incoming'
    });
};
exports.toOutgoingSDPOffer = function (session) {
    return toSDP.toSessionSDP(session, {
        role: 'initiator',
        direction: 'outgoing'
    });
};
exports.toIncomingSDPAnswer = function (session) {
    return toSDP.toSessionSDP(session, {
        role: 'initiator',
        direction: 'incoming'
    });
};
exports.toOutgoingSDPAnswer = function (session) {
    return toSDP.toSessionSDP(session, {
        role: 'responder',
        direction: 'outgoing'
    });
};
exports.toIncomingMediaSDPOffer = function (media) {
    return toSDP.toMediaSDP(media, {
        role: 'responder',
        direction: 'incoming'
    });
};
exports.toOutgoingMediaSDPOffer = function (media) {
    return toSDP.toMediaSDP(media, {
        role: 'initiator',
        direction: 'outgoing'
    });
};
exports.toIncomingMediaSDPAnswer = function (media) {
    return toSDP.toMediaSDP(media, {
        role: 'initiator',
        direction: 'incoming'
    });
};
exports.toOutgoingMediaSDPAnswer = function (media) {
    return toSDP.toMediaSDP(media, {
        role: 'responder',
        direction: 'outgoing'
    });
};
exports.toCandidateSDP = toSDP.toCandidateSDP;
exports.toMediaSDP = toSDP.toMediaSDP;
exports.toSessionSDP = toSDP.toSessionSDP;


// Conversion from SDP to JSON

exports.toIncomingJSONOffer = function (sdp, creators) {
    return toJSON.toSessionJSON(sdp, {
        role: 'responder',
        direction: 'incoming',
        creators: creators
    });
};
exports.toOutgoingJSONOffer = function (sdp, creators) {
    return toJSON.toSessionJSON(sdp, {
        role: 'initiator',
        direction: 'outgoing',
        creators: creators
    });
};
exports.toIncomingJSONAnswer = function (sdp, creators) {
    return toJSON.toSessionJSON(sdp, {
        role: 'initiator',
        direction: 'incoming',
        creators: creators
    });
};
exports.toOutgoingJSONAnswer = function (sdp, creators) {
    return toJSON.toSessionJSON(sdp, {
        role: 'responder',
        direction: 'outgoing',
        creators: creators
    });
};
exports.toIncomingMediaJSONOffer = function (sdp, creator) {
    return toJSON.toMediaJSON(sdp, {
        role: 'responder',
        direction: 'incoming',
        creator: creator
    });
};
exports.toOutgoingMediaJSONOffer = function (sdp, creator) {
    return toJSON.toMediaJSON(sdp, {
        role: 'initiator',
        direction: 'outgoing',
        creator: creator
    });
};
exports.toIncomingMediaJSONAnswer = function (sdp, creator) {
    return toJSON.toMediaJSON(sdp, {
        role: 'initiator',
        direction: 'incoming',
        creator: creator
    });
};
exports.toOutgoingMediaJSONAnswer = function (sdp, creator) {
    return toJSON.toMediaJSON(sdp, {
        role: 'responder',
        direction: 'outgoing',
        creator: creator
    });
};
exports.toCandidateJSON = toJSON.toCandidateJSON;
exports.toMediaJSON = toJSON.toMediaJSON;
exports.toSessionJSON = toJSON.toSessionJSON;

},{"./lib/tojson":6,"./lib/tosdp":7}],4:[function(require,module,exports){
exports.lines = function (sdp) {
    return sdp.split('\r\n').filter(function (line) {
        return line.length > 0;
    });
};

exports.findLine = function (prefix, mediaLines, sessionLines) {
    var prefixLength = prefix.length;
    for (var i = 0; i < mediaLines.length; i++) {
        if (mediaLines[i].substr(0, prefixLength) === prefix) {
            return mediaLines[i];
        }
    }
    // Continue searching in parent session section
    if (!sessionLines) {
        return false;
    }

    for (var j = 0; j < sessionLines.length; j++) {
        if (sessionLines[j].substr(0, prefixLength) === prefix) {
            return sessionLines[j];
        }
    }

    return false;
};

exports.findLines = function (prefix, mediaLines, sessionLines) {
    var results = [];
    var prefixLength = prefix.length;
    for (var i = 0; i < mediaLines.length; i++) {
        if (mediaLines[i].substr(0, prefixLength) === prefix) {
            results.push(mediaLines[i]);
        }
    }
    if (results.length || !sessionLines) {
        return results;
    }
    for (var j = 0; j < sessionLines.length; j++) {
        if (sessionLines[j].substr(0, prefixLength) === prefix) {
            results.push(sessionLines[j]);
        }
    }
    return results;
};

exports.mline = function (line) {
    var parts = line.substr(2).split(' ');
    var parsed = {
        media: parts[0],
        port: parts[1],
        proto: parts[2],
        formats: []
    };
    for (var i = 3; i < parts.length; i++) {
        if (parts[i]) {
            parsed.formats.push(parts[i]);
        }
    }
    return parsed;
};

exports.rtpmap = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {
        id: parts.shift()
    };

    parts = parts[0].split('/');

    parsed.name = parts[0];
    parsed.clockrate = parts[1];
    parsed.channels = parts.length == 3 ? parts[2] : '1';
    return parsed;
};

exports.sctpmap = function (line) {
    // based on -05 draft
    var parts = line.substr(10).split(' ');
    var parsed = {
        number: parts.shift(),
        protocol: parts.shift(),
        streams: parts.shift()
    };
    return parsed;
};


exports.fmtp = function (line) {
    var kv, key, value;
    var parts = line.substr(line.indexOf(' ') + 1).split(';');
    var parsed = [];
    for (var i = 0; i < parts.length; i++) {
        kv = parts[i].split('=');
        key = kv[0].trim();
        value = kv[1];
        if (key && value) {
            parsed.push({key: key, value: value});
        } else if (key) {
            parsed.push({key: '', value: key});
        }
    }
    return parsed;
};

exports.crypto = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {
        tag: parts[0],
        cipherSuite: parts[1],
        keyParams: parts[2],
        sessionParams: parts.slice(3).join(' ')
    };
    return parsed;
};

exports.fingerprint = function (line) {
    var parts = line.substr(14).split(' ');
    return {
        hash: parts[0],
        value: parts[1]
    };
};

exports.extmap = function (line) {
    var parts = line.substr(9).split(' ');
    var parsed = {};

    var idpart = parts.shift();
    var sp = idpart.indexOf('/');
    if (sp >= 0) {
        parsed.id = idpart.substr(0, sp);
        parsed.senders = idpart.substr(sp + 1);
    } else {
        parsed.id = idpart;
        parsed.senders = 'sendrecv';
    }

    parsed.uri = parts.shift() || '';

    return parsed;
};

exports.rtcpfb = function (line) {
    var parts = line.substr(10).split(' ');
    var parsed = {};
    parsed.id = parts.shift();
    parsed.type = parts.shift();
    if (parsed.type === 'trr-int') {
        parsed.value = parts.shift();
    } else {
        parsed.subtype = parts.shift() || '';
    }
    parsed.parameters = parts;
    return parsed;
};

exports.candidate = function (line) {
    var parts;
    if (line.indexOf('a=candidate:') === 0) {
        parts = line.substring(12).split(' ');
    } else { // no a=candidate
        parts = line.substring(10).split(' ');
    }

    var candidate = {
        foundation: parts[0],
        component: parts[1],
        protocol: parts[2].toLowerCase(),
        priority: parts[3],
        ip: parts[4],
        port: parts[5],
        // skip parts[6] == 'typ'
        type: parts[7],
        generation: '0'
    };

    for (var i = 8; i < parts.length; i += 2) {
        if (parts[i] === 'raddr') {
            candidate.relAddr = parts[i + 1];
        } else if (parts[i] === 'rport') {
            candidate.relPort = parts[i + 1];
        } else if (parts[i] === 'generation') {
            candidate.generation = parts[i + 1];
        } else if (parts[i] === 'tcptype') {
            candidate.tcpType = parts[i + 1];
        }
    }

    candidate.network = '1';

    return candidate;
};

exports.sourceGroups = function (lines) {
    var parsed = [];
    for (var i = 0; i < lines.length; i++) {
        var parts = lines[i].substr(13).split(' ');
        parsed.push({
            semantics: parts.shift(),
            sources: parts
        });
    }
    return parsed;
};

exports.sources = function (lines) {
    // http://tools.ietf.org/html/rfc5576
    var parsed = [];
    var sources = {};
    for (var i = 0; i < lines.length; i++) {
        var parts = lines[i].substr(7).split(' ');
        var ssrc = parts.shift();

        if (!sources[ssrc]) {
            var source = {
                ssrc: ssrc,
                parameters: []
            };
            parsed.push(source);

            // Keep an index
            sources[ssrc] = source;
        }

        parts = parts.join(' ').split(':');
        var attribute = parts.shift();
        var value = parts.join(':') || null;

        sources[ssrc].parameters.push({
            key: attribute,
            value: value
        });
    }

    return parsed;
};

exports.groups = function (lines) {
    // http://tools.ietf.org/html/rfc5888
    var parsed = [];
    var parts;
    for (var i = 0; i < lines.length; i++) {
        parts = lines[i].substr(8).split(' ');
        parsed.push({
            semantics: parts.shift(),
            contents: parts
        });
    }
    return parsed;
};

exports.bandwidth = function (line) {
    var parts = line.substr(2).split(':');
    var parsed = {};
    parsed.type = parts.shift();
    parsed.bandwidth = parts.shift();
    return parsed;
};

},{}],5:[function(require,module,exports){
module.exports = {
    initiator: {
        incoming: {
            initiator: 'recvonly',
            responder: 'sendonly',
            both: 'sendrecv',
            none: 'inactive',
            recvonly: 'initiator',
            sendonly: 'responder',
            sendrecv: 'both',
            inactive: 'none'
        },
        outgoing: {
            initiator: 'sendonly',
            responder: 'recvonly',
            both: 'sendrecv',
            none: 'inactive',
            recvonly: 'responder',
            sendonly: 'initiator',
            sendrecv: 'both',
            inactive: 'none'
        }
    },
    responder: {
        incoming: {
            initiator: 'sendonly',
            responder: 'recvonly',
            both: 'sendrecv',
            none: 'inactive',
            recvonly: 'responder',
            sendonly: 'initiator',
            sendrecv: 'both',
            inactive: 'none'
        },
        outgoing: {
            initiator: 'recvonly',
            responder: 'sendonly',
            both: 'sendrecv',
            none: 'inactive',
            recvonly: 'initiator',
            sendonly: 'responder',
            sendrecv: 'both',
            inactive: 'none'
        }
    }
};

},{}],6:[function(require,module,exports){
var SENDERS = require('./senders');
var parsers = require('./parsers');
var idCounter = Math.random();


exports._setIdCounter = function (counter) {
    idCounter = counter;
};

exports.toSessionJSON = function (sdp, opts) {
    var i;
    var creators = opts.creators || [];
    var role = opts.role || 'initiator';
    var direction = opts.direction || 'outgoing';


    // Divide the SDP into session and media sections.
    var media = sdp.split('\r\nm=');
    for (i = 1; i < media.length; i++) {
        media[i] = 'm=' + media[i];
        if (i !== media.length - 1) {
            media[i] += '\r\n';
        }
    }
    var session = media.shift() + '\r\n';
    var sessionLines = parsers.lines(session);
    var parsed = {};

    var contents = [];
    for (i = 0; i < media.length; i++) {
        contents.push(exports.toMediaJSON(media[i], session, {
            role: role,
            direction: direction,
            creator: creators[i] || 'initiator'
        }));
    }
    parsed.contents = contents;

    var groupLines = parsers.findLines('a=group:', sessionLines);
    if (groupLines.length) {
        parsed.groups = parsers.groups(groupLines);
    }

    return parsed;
};

exports.toMediaJSON = function (media, session, opts) {
    var creator = opts.creator || 'initiator';
    var role = opts.role || 'initiator';
    var direction = opts.direction || 'outgoing';

    var lines = parsers.lines(media);
    var sessionLines = parsers.lines(session);
    var mline = parsers.mline(lines[0]);

    var content = {
        creator: creator,
        name: mline.media,
        description: {
            descType: 'rtp',
            media: mline.media,
            payloads: [],
            encryption: [],
            feedback: [],
            headerExtensions: []
        },
        transport: {
            transType: 'iceUdp',
            candidates: [],
            fingerprints: []
        }
    };
    if (mline.media == 'application') {
        // FIXME: the description is most likely to be independent
        // of the SDP and should be processed by other parts of the library
        content.description = {
            descType: 'datachannel'
        };
        content.transport.sctp = [];
    }
    var desc = content.description;
    var trans = content.transport;

    // If we have a mid, use that for the content name instead.
    var mid = parsers.findLine('a=mid:', lines);
    if (mid) {
        content.name = mid.substr(6);
    }

    if (parsers.findLine('a=sendrecv', lines, sessionLines)) {
        content.senders = 'both';
    } else if (parsers.findLine('a=sendonly', lines, sessionLines)) {
        content.senders = SENDERS[role][direction].sendonly;
    } else if (parsers.findLine('a=recvonly', lines, sessionLines)) {
        content.senders = SENDERS[role][direction].recvonly;
    } else if (parsers.findLine('a=inactive', lines, sessionLines)) {
        content.senders = 'none';
    }

    if (desc.descType == 'rtp') {
        var bandwidth = parsers.findLine('b=', lines);
        if (bandwidth) {
            desc.bandwidth = parsers.bandwidth(bandwidth);
        }

        var ssrc = parsers.findLine('a=ssrc:', lines);
        if (ssrc) {
            desc.ssrc = ssrc.substr(7).split(' ')[0];
        }

        var rtpmapLines = parsers.findLines('a=rtpmap:', lines);
        rtpmapLines.forEach(function (line) {
            var payload = parsers.rtpmap(line);
            payload.parameters = [];
            payload.feedback = [];

            var fmtpLines = parsers.findLines('a=fmtp:' + payload.id, lines);
            // There should only be one fmtp line per payload
            fmtpLines.forEach(function (line) {
                payload.parameters = parsers.fmtp(line);
            });

            var fbLines = parsers.findLines('a=rtcp-fb:' + payload.id, lines);
            fbLines.forEach(function (line) {
                payload.feedback.push(parsers.rtcpfb(line));
            });

            desc.payloads.push(payload);
        });

        var cryptoLines = parsers.findLines('a=crypto:', lines, sessionLines);
        cryptoLines.forEach(function (line) {
            desc.encryption.push(parsers.crypto(line));
        });

        if (parsers.findLine('a=rtcp-mux', lines)) {
            desc.mux = true;
        }

        var fbLines = parsers.findLines('a=rtcp-fb:*', lines);
        fbLines.forEach(function (line) {
            desc.feedback.push(parsers.rtcpfb(line));
        });

        var extLines = parsers.findLines('a=extmap:', lines);
        extLines.forEach(function (line) {
            var ext = parsers.extmap(line);

            ext.senders = SENDERS[role][direction][ext.senders];

            desc.headerExtensions.push(ext);
        });

        var ssrcGroupLines = parsers.findLines('a=ssrc-group:', lines);
        desc.sourceGroups = parsers.sourceGroups(ssrcGroupLines || []);

        var ssrcLines = parsers.findLines('a=ssrc:', lines);
        desc.sources = parsers.sources(ssrcLines || []);

        if (parsers.findLine('a=x-google-flag:conference', lines, sessionLines)) {
            desc.googConferenceFlag = true;
        }
    }

    // transport specific attributes
    var fingerprintLines = parsers.findLines('a=fingerprint:', lines, sessionLines);
    var setup = parsers.findLine('a=setup:', lines, sessionLines);
    fingerprintLines.forEach(function (line) {
        var fp = parsers.fingerprint(line);
        if (setup) {
            fp.setup = setup.substr(8);
        }
        trans.fingerprints.push(fp);
    });

    var ufragLine = parsers.findLine('a=ice-ufrag:', lines, sessionLines);
    var pwdLine = parsers.findLine('a=ice-pwd:', lines, sessionLines);
    if (ufragLine && pwdLine) {
        trans.ufrag = ufragLine.substr(12);
        trans.pwd = pwdLine.substr(10);
        trans.candidates = [];

        var candidateLines = parsers.findLines('a=candidate:', lines, sessionLines);
        candidateLines.forEach(function (line) {
            trans.candidates.push(exports.toCandidateJSON(line));
        });
    }

    if (desc.descType == 'datachannel') {
        var sctpmapLines = parsers.findLines('a=sctpmap:', lines);
        sctpmapLines.forEach(function (line) {
            var sctp = parsers.sctpmap(line);
            trans.sctp.push(sctp);
        });
    }

    return content;
};

exports.toCandidateJSON = function (line) {
    var candidate = parsers.candidate(line.split('\r\n')[0]);
    candidate.id = (idCounter++).toString(36).substr(0, 12);
    return candidate;
};

},{"./parsers":4,"./senders":5}],7:[function(require,module,exports){
var SENDERS = require('./senders');


exports.toSessionSDP = function (session, opts) {
    var role = opts.role || 'initiator';
    var direction = opts.direction || 'outgoing';
    var sid = opts.sid || session.sid || Date.now();
    var time = opts.time || Date.now();

    var sdp = [
        'v=0',
        'o=- ' + sid + ' ' + time + ' IN IP4 0.0.0.0',
        's=-',
        't=0 0'
    ];

    var groups = session.groups || [];
    groups.forEach(function (group) {
        sdp.push('a=group:' + group.semantics + ' ' + group.contents.join(' '));
    });

    var contents = session.contents || [];
    contents.forEach(function (content) {
        sdp.push(exports.toMediaSDP(content, opts));
    });

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

exports.toMediaSDP = function (content, opts) {
    var sdp = [];

    var role = opts.role || 'initiator';
    var direction = opts.direction || 'outgoing';

    var desc = content.description;
    var transport = content.transport;
    var payloads = desc.payloads || [];
    var fingerprints = (transport && transport.fingerprints) || [];

    var mline = [];
    if (desc.descType == 'datachannel') {
        mline.push('application');
        mline.push('1');
        mline.push('DTLS/SCTP');
        if (transport.sctp) {
            transport.sctp.forEach(function (map) {
                mline.push(map.number);
            });
        }
    } else {
        mline.push(desc.media);
        mline.push('1');
        if ((desc.encryption && desc.encryption.length > 0) || (fingerprints.length > 0)) {
            mline.push('RTP/SAVPF');
        } else {
            mline.push('RTP/AVPF');
        }
        payloads.forEach(function (payload) {
            mline.push(payload.id);
        });
    }


    sdp.push('m=' + mline.join(' '));

    sdp.push('c=IN IP4 0.0.0.0');
    if (desc.bandwidth && desc.bandwidth.type && desc.bandwidth.bandwidth) {
        sdp.push('b=' + desc.bandwidth.type + ':' + desc.bandwidth.bandwidth);
    }
    if (desc.descType == 'rtp') {
        sdp.push('a=rtcp:1 IN IP4 0.0.0.0');
    }

    if (transport) {
        if (transport.ufrag) {
            sdp.push('a=ice-ufrag:' + transport.ufrag);
        }
        if (transport.pwd) {
            sdp.push('a=ice-pwd:' + transport.pwd);
        }

        var pushedSetup = false;
        fingerprints.forEach(function (fingerprint) {
            sdp.push('a=fingerprint:' + fingerprint.hash + ' ' + fingerprint.value);
            if (fingerprint.setup && !pushedSetup) {
                sdp.push('a=setup:' + fingerprint.setup);
            }
        });

        if (transport.sctp) {
            transport.sctp.forEach(function (map) {
                sdp.push('a=sctpmap:' + map.number + ' ' + map.protocol + ' ' + map.streams);
            });
        }
    }

    if (desc.descType == 'rtp') {
        sdp.push('a=' + (SENDERS[role][direction][content.senders] || 'sendrecv'));
    }
    sdp.push('a=mid:' + content.name);

    if (desc.mux) {
        sdp.push('a=rtcp-mux');
    }

    var encryption = desc.encryption || [];
    encryption.forEach(function (crypto) {
        sdp.push('a=crypto:' + crypto.tag + ' ' + crypto.cipherSuite + ' ' + crypto.keyParams + (crypto.sessionParams ? ' ' + crypto.sessionParams : ''));
    });
    if (desc.googConferenceFlag) {
        sdp.push('a=x-google-flag:conference');
    }

    payloads.forEach(function (payload) {
        var rtpmap = 'a=rtpmap:' + payload.id + ' ' + payload.name + '/' + payload.clockrate;
        if (payload.channels && payload.channels != '1') {
            rtpmap += '/' + payload.channels;
        }
        sdp.push(rtpmap);

        if (payload.parameters && payload.parameters.length) {
            var fmtp = ['a=fmtp:' + payload.id];
            var parameters = [];
            payload.parameters.forEach(function (param) {
                parameters.push((param.key ? param.key + '=' : '') + param.value);
            });
            fmtp.push(parameters.join(';'));
            sdp.push(fmtp.join(' '));
        }

        if (payload.feedback) {
            payload.feedback.forEach(function (fb) {
                if (fb.type === 'trr-int') {
                    sdp.push('a=rtcp-fb:' + payload.id + ' trr-int ' + (fb.value ? fb.value : '0'));
                } else {
                    sdp.push('a=rtcp-fb:' + payload.id + ' ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
                }
            });
        }
    });

    if (desc.feedback) {
        desc.feedback.forEach(function (fb) {
            if (fb.type === 'trr-int') {
                sdp.push('a=rtcp-fb:* trr-int ' + (fb.value ? fb.value : '0'));
            } else {
                sdp.push('a=rtcp-fb:* ' + fb.type + (fb.subtype ? ' ' + fb.subtype : ''));
            }
        });
    }

    var hdrExts = desc.headerExtensions || [];
    hdrExts.forEach(function (hdr) {
        sdp.push('a=extmap:' + hdr.id + (hdr.senders ? '/' + SENDERS[role][direction][hdr.senders] : '') + ' ' + hdr.uri);
    });

    var ssrcGroups = desc.sourceGroups || [];
    ssrcGroups.forEach(function (ssrcGroup) {
        sdp.push('a=ssrc-group:' + ssrcGroup.semantics + ' ' + ssrcGroup.sources.join(' '));
    });

    var ssrcs = desc.sources || [];
    ssrcs.forEach(function (ssrc) {
        for (var i = 0; i < ssrc.parameters.length; i++) {
            var param = ssrc.parameters[i];
            sdp.push('a=ssrc:' + (ssrc.ssrc || desc.ssrc) + ' ' + param.key + (param.value ? (':' + param.value) : ''));
        }
    });

    var candidates = transport.candidates || [];
    candidates.forEach(function (candidate) {
        sdp.push(exports.toCandidateSDP(candidate));
    });

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

exports.toCandidateSDP = function (candidate) {
    var sdp = [];

    sdp.push(candidate.foundation);
    sdp.push(candidate.component);
    sdp.push(candidate.protocol.toUpperCase());
    sdp.push(candidate.priority);
    sdp.push(candidate.ip);
    sdp.push(candidate.port);

    var type = candidate.type;
    sdp.push('typ');
    sdp.push(type);
    if (type === 'srflx' || type === 'prflx' || type === 'relay') {
        if (candidate.relAddr && candidate.relPort) {
            sdp.push('raddr');
            sdp.push(candidate.relAddr);
            sdp.push('rport');
            sdp.push(candidate.relPort);
        }
    }
    if (candidate.tcpType && candidate.protocol.toUpperCase() == 'TCP') {
        sdp.push('tcptype');
        sdp.push(candidate.tcpType);
    }

    sdp.push('generation');
    sdp.push(candidate.generation || '0');

    // FIXME: apparently this is wrong per spec
    // but then, we need this when actually putting this into
    // SDP so it's going to stay.
    // decision needs to be revisited when browsers dont
    // accept this any longer
    return 'a=candidate:' + sdp.join(' ');
};

},{"./senders":5}],8:[function(require,module,exports){
// based on https://github.com/ESTOS/strophe.jingle/
// adds wildemitter support
var util = require('util');
var webrtc = require('webrtcsupport');
var WildEmitter = require('wildemitter');

function dumpSDP(description) {
    return {
        type: description.type,
        sdp: description.sdp
    };
}

function dumpStream(stream) {
    var info = {
        label: stream.id,
    };
    if (stream.getAudioTracks().length) {
        info.audio = stream.getAudioTracks().map(function (track) {
            return track.id;
        });
    }
    if (stream.getVideoTracks().length) {
        info.video = stream.getVideoTracks().map(function (track) {
            return track.id;
        });
    }
    return info;
}

function TraceablePeerConnection(config, constraints) {
    var self = this;
    WildEmitter.call(this);

    this.peerconnection = new webrtc.PeerConnection(config, constraints);

    this.trace = function (what, info) {
        self.emit('PeerConnectionTrace', {
            time: new Date(),
            type: what,
            value: info || ""
        });
    };

    this.onicecandidate = null;
    this.peerconnection.onicecandidate = function (event) {
        self.trace('onicecandidate', event.candidate);
        if (self.onicecandidate !== null) {
            self.onicecandidate(event);
        }
    };
    this.onaddstream = null;
    this.peerconnection.onaddstream = function (event) {
        self.trace('onaddstream', dumpStream(event.stream));
        if (self.onaddstream !== null) {
            self.onaddstream(event);
        }
    };
    this.onremovestream = null;
    this.peerconnection.onremovestream = function (event) {
        self.trace('onremovestream', dumpStream(event.stream));
        if (self.onremovestream !== null) {
            self.onremovestream(event);
        }
    };
    this.onsignalingstatechange = null;
    this.peerconnection.onsignalingstatechange = function (event) {
        self.trace('onsignalingstatechange', self.signalingState);
        if (self.onsignalingstatechange !== null) {
            self.onsignalingstatechange(event);
        }
    };
    this.oniceconnectionstatechange = null;
    this.peerconnection.oniceconnectionstatechange = function (event) {
        self.trace('oniceconnectionstatechange', self.iceConnectionState);
        if (self.oniceconnectionstatechange !== null) {
            self.oniceconnectionstatechange(event);
        }
    };
    this.onnegotiationneeded = null;
    this.peerconnection.onnegotiationneeded = function (event) {
        self.trace('onnegotiationneeded');
        if (self.onnegotiationneeded !== null) {
            self.onnegotiationneeded(event);
        }
    };
    self.ondatachannel = null;
    this.peerconnection.ondatachannel = function (event) {
        self.trace('ondatachannel', event);
        if (self.ondatachannel !== null) {
            self.ondatachannel(event);
        }
    };
    this.getLocalStreams = this.peerconnection.getLocalStreams.bind(this.peerconnection);
    this.getRemoteStreams = this.peerconnection.getRemoteStreams.bind(this.peerconnection);
}

util.inherits(TraceablePeerConnection, WildEmitter);

Object.defineProperty(TraceablePeerConnection.prototype, 'signalingState', {
    get: function () {
        return this.peerconnection.signalingState;
    }
});

Object.defineProperty(TraceablePeerConnection.prototype, 'iceConnectionState', {
    get: function () {
        return this.peerconnection.iceConnectionState;
    }
});

Object.defineProperty(TraceablePeerConnection.prototype, 'localDescription', {
    get: function () {
        return this.peerconnection.localDescription;
    }
});

Object.defineProperty(TraceablePeerConnection.prototype, 'remoteDescription', {
    get: function () {
        return this.peerconnection.remoteDescription;
    }
});

TraceablePeerConnection.prototype.addStream = function (stream) {
    this.trace('addStream', dumpStream(stream));
    this.peerconnection.addStream(stream);
};

TraceablePeerConnection.prototype.removeStream = function (stream) {
    this.trace('removeStream', dumpStream(stream));
    this.peerconnection.removeStream(stream);
};

TraceablePeerConnection.prototype.createDataChannel = function (label, opts) {
    this.trace('createDataChannel', label, opts);
    return this.peerconnection.createDataChannel(label, opts);
};

TraceablePeerConnection.prototype.setLocalDescription = function (description, successCallback, failureCallback) {
    var self = this;
    this.trace('setLocalDescription', dumpSDP(description));
    this.peerconnection.setLocalDescription(description,
        function () {
            self.trace('setLocalDescriptionOnSuccess');
            successCallback();
        },
        function (err) {
            self.trace('setLocalDescriptionOnFailure', err);
            failureCallback(err);
        }
    );
};

TraceablePeerConnection.prototype.setRemoteDescription = function (description, successCallback, failureCallback) {
    var self = this;
    this.trace('setRemoteDescription', dumpSDP(description));
    this.peerconnection.setRemoteDescription(description,
        function () {
            self.trace('setRemoteDescriptionOnSuccess');
            successCallback();
        },
        function (err) {
            self.trace('setRemoteDescriptionOnFailure', err);
            failureCallback(err);
        }
    );
};

TraceablePeerConnection.prototype.close = function () {
    this.trace('stop');
    if (this.statsinterval !== null) {
        window.clearInterval(this.statsinterval);
        this.statsinterval = null;
    }
    if (this.peerconnection.signalingState != 'closed') {
        this.peerconnection.close();
    }
};

TraceablePeerConnection.prototype.createOffer = function (successCallback, failureCallback, constraints) {
    var self = this;
    this.trace('createOffer', constraints);
    this.peerconnection.createOffer(
        function (offer) {
            self.trace('createOfferOnSuccess', dumpSDP(offer));
            successCallback(offer);
        },
        function (err) {
            self.trace('createOfferOnFailure', err);
            failureCallback(err);
        },
        constraints
    );
};

TraceablePeerConnection.prototype.createAnswer = function (successCallback, failureCallback, constraints) {
    var self = this;
    this.trace('createAnswer', constraints);
    this.peerconnection.createAnswer(
        function (answer) {
            self.trace('createAnswerOnSuccess', dumpSDP(answer));
            successCallback(answer);
        },
        function (err) {
            self.trace('createAnswerOnFailure', err);
            failureCallback(err);
        },
        constraints
    );
};

TraceablePeerConnection.prototype.addIceCandidate = function (candidate, successCallback, failureCallback) {
    var self = this;
    this.trace('addIceCandidate', candidate);
    this.peerconnection.addIceCandidate(candidate,
        function () {
            //self.trace('addIceCandidateOnSuccess');
            if (successCallback) successCallback();
        },
        function (err) {
            self.trace('addIceCandidateOnFailure', err);
            if (failureCallback) failureCallback(err);
        }
    );
};

TraceablePeerConnection.prototype.getStats = function (callback, errback) {
    if (navigator.mozGetUserMedia) {
        this.peerconnection.getStats(null, callback, errback);
    } else {
        this.peerconnection.getStats(callback);
    }
};

module.exports = TraceablePeerConnection;

},{"util":2,"webrtcsupport":10,"wildemitter":11}],9:[function(require,module,exports){
//     Underscore.js 1.8.2
//     http://underscorejs.org
//     (c) 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
//     Underscore may be freely distributed under the MIT license.

(function() {

  // Baseline setup
  // --------------

  // Establish the root object, `window` in the browser, or `exports` on the server.
  var root = this;

  // Save the previous value of the `_` variable.
  var previousUnderscore = root._;

  // Save bytes in the minified (but not gzipped) version:
  var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;

  // Create quick reference variables for speed access to core prototypes.
  var
    push             = ArrayProto.push,
    slice            = ArrayProto.slice,
    toString         = ObjProto.toString,
    hasOwnProperty   = ObjProto.hasOwnProperty;

  // All **ECMAScript 5** native function implementations that we hope to use
  // are declared here.
  var
    nativeIsArray      = Array.isArray,
    nativeKeys         = Object.keys,
    nativeBind         = FuncProto.bind,
    nativeCreate       = Object.create;

  // Naked function reference for surrogate-prototype-swapping.
  var Ctor = function(){};

  // Create a safe reference to the Underscore object for use below.
  var _ = function(obj) {
    if (obj instanceof _) return obj;
    if (!(this instanceof _)) return new _(obj);
    this._wrapped = obj;
  };

  // Export the Underscore object for **Node.js**, with
  // backwards-compatibility for the old `require()` API. If we're in
  // the browser, add `_` as a global object.
  if (typeof exports !== 'undefined') {
    if (typeof module !== 'undefined' && module.exports) {
      exports = module.exports = _;
    }
    exports._ = _;
  } else {
    root._ = _;
  }

  // Current version.
  _.VERSION = '1.8.2';

  // Internal function that returns an efficient (for current engines) version
  // of the passed-in callback, to be repeatedly applied in other Underscore
  // functions.
  var optimizeCb = function(func, context, argCount) {
    if (context === void 0) return func;
    switch (argCount == null ? 3 : argCount) {
      case 1: return function(value) {
        return func.call(context, value);
      };
      case 2: return function(value, other) {
        return func.call(context, value, other);
      };
      case 3: return function(value, index, collection) {
        return func.call(context, value, index, collection);
      };
      case 4: return function(accumulator, value, index, collection) {
        return func.call(context, accumulator, value, index, collection);
      };
    }
    return function() {
      return func.apply(context, arguments);
    };
  };

  // A mostly-internal function to generate callbacks that can be applied
  // to each element in a collection, returning the desired result — either
  // identity, an arbitrary callback, a property matcher, or a property accessor.
  var cb = function(value, context, argCount) {
    if (value == null) return _.identity;
    if (_.isFunction(value)) return optimizeCb(value, context, argCount);
    if (_.isObject(value)) return _.matcher(value);
    return _.property(value);
  };
  _.iteratee = function(value, context) {
    return cb(value, context, Infinity);
  };

  // An internal function for creating assigner functions.
  var createAssigner = function(keysFunc, undefinedOnly) {
    return function(obj) {
      var length = arguments.length;
      if (length < 2 || obj == null) return obj;
      for (var index = 1; index < length; index++) {
        var source = arguments[index],
            keys = keysFunc(source),
            l = keys.length;
        for (var i = 0; i < l; i++) {
          var key = keys[i];
          if (!undefinedOnly || obj[key] === void 0) obj[key] = source[key];
        }
      }
      return obj;
    };
  };

  // An internal function for creating a new object that inherits from another.
  var baseCreate = function(prototype) {
    if (!_.isObject(prototype)) return {};
    if (nativeCreate) return nativeCreate(prototype);
    Ctor.prototype = prototype;
    var result = new Ctor;
    Ctor.prototype = null;
    return result;
  };

  // Helper for collection methods to determine whether a collection
  // should be iterated as an array or as an object
  // Related: http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
  var isArrayLike = function(collection) {
    var length = collection && collection.length;
    return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
  };

  // Collection Functions
  // --------------------

  // The cornerstone, an `each` implementation, aka `forEach`.
  // Handles raw objects in addition to array-likes. Treats all
  // sparse array-likes as if they were dense.
  _.each = _.forEach = function(obj, iteratee, context) {
    iteratee = optimizeCb(iteratee, context);
    var i, length;
    if (isArrayLike(obj)) {
      for (i = 0, length = obj.length; i < length; i++) {
        iteratee(obj[i], i, obj);
      }
    } else {
      var keys = _.keys(obj);
      for (i = 0, length = keys.length; i < length; i++) {
        iteratee(obj[keys[i]], keys[i], obj);
      }
    }
    return obj;
  };

  // Return the results of applying the iteratee to each element.
  _.map = _.collect = function(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var keys = !isArrayLike(obj) && _.keys(obj),
        length = (keys || obj).length,
        results = Array(length);
    for (var index = 0; index < length; index++) {
      var currentKey = keys ? keys[index] : index;
      results[index] = iteratee(obj[currentKey], currentKey, obj);
    }
    return results;
  };

  // Create a reducing function iterating left or right.
  function createReduce(dir) {
    // Optimized iterator function as using arguments.length
    // in the main function will deoptimize the, see #1991.
    function iterator(obj, iteratee, memo, keys, index, length) {
      for (; index >= 0 && index < length; index += dir) {
        var currentKey = keys ? keys[index] : index;
        memo = iteratee(memo, obj[currentKey], currentKey, obj);
      }
      return memo;
    }

    return function(obj, iteratee, memo, context) {
      iteratee = optimizeCb(iteratee, context, 4);
      var keys = !isArrayLike(obj) && _.keys(obj),
          length = (keys || obj).length,
          index = dir > 0 ? 0 : length - 1;
      // Determine the initial value if none is provided.
      if (arguments.length < 3) {
        memo = obj[keys ? keys[index] : index];
        index += dir;
      }
      return iterator(obj, iteratee, memo, keys, index, length);
    };
  }

  // **Reduce** builds up a single result from a list of values, aka `inject`,
  // or `foldl`.
  _.reduce = _.foldl = _.inject = createReduce(1);

  // The right-associative version of reduce, also known as `foldr`.
  _.reduceRight = _.foldr = createReduce(-1);

  // Return the first value which passes a truth test. Aliased as `detect`.
  _.find = _.detect = function(obj, predicate, context) {
    var key;
    if (isArrayLike(obj)) {
      key = _.findIndex(obj, predicate, context);
    } else {
      key = _.findKey(obj, predicate, context);
    }
    if (key !== void 0 && key !== -1) return obj[key];
  };

  // Return all the elements that pass a truth test.
  // Aliased as `select`.
  _.filter = _.select = function(obj, predicate, context) {
    var results = [];
    predicate = cb(predicate, context);
    _.each(obj, function(value, index, list) {
      if (predicate(value, index, list)) results.push(value);
    });
    return results;
  };

  // Return all the elements for which a truth test fails.
  _.reject = function(obj, predicate, context) {
    return _.filter(obj, _.negate(cb(predicate)), context);
  };

  // Determine whether all of the elements match a truth test.
  // Aliased as `all`.
  _.every = _.all = function(obj, predicate, context) {
    predicate = cb(predicate, context);
    var keys = !isArrayLike(obj) && _.keys(obj),
        length = (keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = keys ? keys[index] : index;
      if (!predicate(obj[currentKey], currentKey, obj)) return false;
    }
    return true;
  };

  // Determine if at least one element in the object matches a truth test.
  // Aliased as `any`.
  _.some = _.any = function(obj, predicate, context) {
    predicate = cb(predicate, context);
    var keys = !isArrayLike(obj) && _.keys(obj),
        length = (keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = keys ? keys[index] : index;
      if (predicate(obj[currentKey], currentKey, obj)) return true;
    }
    return false;
  };

  // Determine if the array or object contains a given value (using `===`).
  // Aliased as `includes` and `include`.
  _.contains = _.includes = _.include = function(obj, target, fromIndex) {
    if (!isArrayLike(obj)) obj = _.values(obj);
    return _.indexOf(obj, target, typeof fromIndex == 'number' && fromIndex) >= 0;
  };

  // Invoke a method (with arguments) on every item in a collection.
  _.invoke = function(obj, method) {
    var args = slice.call(arguments, 2);
    var isFunc = _.isFunction(method);
    return _.map(obj, function(value) {
      var func = isFunc ? method : value[method];
      return func == null ? func : func.apply(value, args);
    });
  };

  // Convenience version of a common use case of `map`: fetching a property.
  _.pluck = function(obj, key) {
    return _.map(obj, _.property(key));
  };

  // Convenience version of a common use case of `filter`: selecting only objects
  // containing specific `key:value` pairs.
  _.where = function(obj, attrs) {
    return _.filter(obj, _.matcher(attrs));
  };

  // Convenience version of a common use case of `find`: getting the first object
  // containing specific `key:value` pairs.
  _.findWhere = function(obj, attrs) {
    return _.find(obj, _.matcher(attrs));
  };

  // Return the maximum element (or element-based computation).
  _.max = function(obj, iteratee, context) {
    var result = -Infinity, lastComputed = -Infinity,
        value, computed;
    if (iteratee == null && obj != null) {
      obj = isArrayLike(obj) ? obj : _.values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value > result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      _.each(obj, function(value, index, list) {
        computed = iteratee(value, index, list);
        if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
          result = value;
          lastComputed = computed;
        }
      });
    }
    return result;
  };

  // Return the minimum element (or element-based computation).
  _.min = function(obj, iteratee, context) {
    var result = Infinity, lastComputed = Infinity,
        value, computed;
    if (iteratee == null && obj != null) {
      obj = isArrayLike(obj) ? obj : _.values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value < result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      _.each(obj, function(value, index, list) {
        computed = iteratee(value, index, list);
        if (computed < lastComputed || computed === Infinity && result === Infinity) {
          result = value;
          lastComputed = computed;
        }
      });
    }
    return result;
  };

  // Shuffle a collection, using the modern version of the
  // [Fisher-Yates shuffle](http://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
  _.shuffle = function(obj) {
    var set = isArrayLike(obj) ? obj : _.values(obj);
    var length = set.length;
    var shuffled = Array(length);
    for (var index = 0, rand; index < length; index++) {
      rand = _.random(0, index);
      if (rand !== index) shuffled[index] = shuffled[rand];
      shuffled[rand] = set[index];
    }
    return shuffled;
  };

  // Sample **n** random values from a collection.
  // If **n** is not specified, returns a single random element.
  // The internal `guard` argument allows it to work with `map`.
  _.sample = function(obj, n, guard) {
    if (n == null || guard) {
      if (!isArrayLike(obj)) obj = _.values(obj);
      return obj[_.random(obj.length - 1)];
    }
    return _.shuffle(obj).slice(0, Math.max(0, n));
  };

  // Sort the object's values by a criterion produced by an iteratee.
  _.sortBy = function(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    return _.pluck(_.map(obj, function(value, index, list) {
      return {
        value: value,
        index: index,
        criteria: iteratee(value, index, list)
      };
    }).sort(function(left, right) {
      var a = left.criteria;
      var b = right.criteria;
      if (a !== b) {
        if (a > b || a === void 0) return 1;
        if (a < b || b === void 0) return -1;
      }
      return left.index - right.index;
    }), 'value');
  };

  // An internal function used for aggregate "group by" operations.
  var group = function(behavior) {
    return function(obj, iteratee, context) {
      var result = {};
      iteratee = cb(iteratee, context);
      _.each(obj, function(value, index) {
        var key = iteratee(value, index, obj);
        behavior(result, value, key);
      });
      return result;
    };
  };

  // Groups the object's values by a criterion. Pass either a string attribute
  // to group by, or a function that returns the criterion.
  _.groupBy = group(function(result, value, key) {
    if (_.has(result, key)) result[key].push(value); else result[key] = [value];
  });

  // Indexes the object's values by a criterion, similar to `groupBy`, but for
  // when you know that your index values will be unique.
  _.indexBy = group(function(result, value, key) {
    result[key] = value;
  });

  // Counts instances of an object that group by a certain criterion. Pass
  // either a string attribute to count by, or a function that returns the
  // criterion.
  _.countBy = group(function(result, value, key) {
    if (_.has(result, key)) result[key]++; else result[key] = 1;
  });

  // Safely create a real, live array from anything iterable.
  _.toArray = function(obj) {
    if (!obj) return [];
    if (_.isArray(obj)) return slice.call(obj);
    if (isArrayLike(obj)) return _.map(obj, _.identity);
    return _.values(obj);
  };

  // Return the number of elements in an object.
  _.size = function(obj) {
    if (obj == null) return 0;
    return isArrayLike(obj) ? obj.length : _.keys(obj).length;
  };

  // Split a collection into two arrays: one whose elements all satisfy the given
  // predicate, and one whose elements all do not satisfy the predicate.
  _.partition = function(obj, predicate, context) {
    predicate = cb(predicate, context);
    var pass = [], fail = [];
    _.each(obj, function(value, key, obj) {
      (predicate(value, key, obj) ? pass : fail).push(value);
    });
    return [pass, fail];
  };

  // Array Functions
  // ---------------

  // Get the first element of an array. Passing **n** will return the first N
  // values in the array. Aliased as `head` and `take`. The **guard** check
  // allows it to work with `_.map`.
  _.first = _.head = _.take = function(array, n, guard) {
    if (array == null) return void 0;
    if (n == null || guard) return array[0];
    return _.initial(array, array.length - n);
  };

  // Returns everything but the last entry of the array. Especially useful on
  // the arguments object. Passing **n** will return all the values in
  // the array, excluding the last N.
  _.initial = function(array, n, guard) {
    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
  };

  // Get the last element of an array. Passing **n** will return the last N
  // values in the array.
  _.last = function(array, n, guard) {
    if (array == null) return void 0;
    if (n == null || guard) return array[array.length - 1];
    return _.rest(array, Math.max(0, array.length - n));
  };

  // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
  // Especially useful on the arguments object. Passing an **n** will return
  // the rest N values in the array.
  _.rest = _.tail = _.drop = function(array, n, guard) {
    return slice.call(array, n == null || guard ? 1 : n);
  };

  // Trim out all falsy values from an array.
  _.compact = function(array) {
    return _.filter(array, _.identity);
  };

  // Internal implementation of a recursive `flatten` function.
  var flatten = function(input, shallow, strict, startIndex) {
    var output = [], idx = 0;
    for (var i = startIndex || 0, length = input && input.length; i < length; i++) {
      var value = input[i];
      if (isArrayLike(value) && (_.isArray(value) || _.isArguments(value))) {
        //flatten current level of array or arguments object
        if (!shallow) value = flatten(value, shallow, strict);
        var j = 0, len = value.length;
        output.length += len;
        while (j < len) {
          output[idx++] = value[j++];
        }
      } else if (!strict) {
        output[idx++] = value;
      }
    }
    return output;
  };

  // Flatten out an array, either recursively (by default), or just one level.
  _.flatten = function(array, shallow) {
    return flatten(array, shallow, false);
  };

  // Return a version of the array that does not contain the specified value(s).
  _.without = function(array) {
    return _.difference(array, slice.call(arguments, 1));
  };

  // Produce a duplicate-free version of the array. If the array has already
  // been sorted, you have the option of using a faster algorithm.
  // Aliased as `unique`.
  _.uniq = _.unique = function(array, isSorted, iteratee, context) {
    if (array == null) return [];
    if (!_.isBoolean(isSorted)) {
      context = iteratee;
      iteratee = isSorted;
      isSorted = false;
    }
    if (iteratee != null) iteratee = cb(iteratee, context);
    var result = [];
    var seen = [];
    for (var i = 0, length = array.length; i < length; i++) {
      var value = array[i],
          computed = iteratee ? iteratee(value, i, array) : value;
      if (isSorted) {
        if (!i || seen !== computed) result.push(value);
        seen = computed;
      } else if (iteratee) {
        if (!_.contains(seen, computed)) {
          seen.push(computed);
          result.push(value);
        }
      } else if (!_.contains(result, value)) {
        result.push(value);
      }
    }
    return result;
  };

  // Produce an array that contains the union: each distinct element from all of
  // the passed-in arrays.
  _.union = function() {
    return _.uniq(flatten(arguments, true, true));
  };

  // Produce an array that contains every item shared between all the
  // passed-in arrays.
  _.intersection = function(array) {
    if (array == null) return [];
    var result = [];
    var argsLength = arguments.length;
    for (var i = 0, length = array.length; i < length; i++) {
      var item = array[i];
      if (_.contains(result, item)) continue;
      for (var j = 1; j < argsLength; j++) {
        if (!_.contains(arguments[j], item)) break;
      }
      if (j === argsLength) result.push(item);
    }
    return result;
  };

  // Take the difference between one array and a number of other arrays.
  // Only the elements present in just the first array will remain.
  _.difference = function(array) {
    var rest = flatten(arguments, true, true, 1);
    return _.filter(array, function(value){
      return !_.contains(rest, value);
    });
  };

  // Zip together multiple lists into a single array -- elements that share
  // an index go together.
  _.zip = function() {
    return _.unzip(arguments);
  };

  // Complement of _.zip. Unzip accepts an array of arrays and groups
  // each array's elements on shared indices
  _.unzip = function(array) {
    var length = array && _.max(array, 'length').length || 0;
    var result = Array(length);

    for (var index = 0; index < length; index++) {
      result[index] = _.pluck(array, index);
    }
    return result;
  };

  // Converts lists into objects. Pass either a single array of `[key, value]`
  // pairs, or two parallel arrays of the same length -- one of keys, and one of
  // the corresponding values.
  _.object = function(list, values) {
    var result = {};
    for (var i = 0, length = list && list.length; i < length; i++) {
      if (values) {
        result[list[i]] = values[i];
      } else {
        result[list[i][0]] = list[i][1];
      }
    }
    return result;
  };

  // Return the position of the first occurrence of an item in an array,
  // or -1 if the item is not included in the array.
  // If the array is large and already in sort order, pass `true`
  // for **isSorted** to use binary search.
  _.indexOf = function(array, item, isSorted) {
    var i = 0, length = array && array.length;
    if (typeof isSorted == 'number') {
      i = isSorted < 0 ? Math.max(0, length + isSorted) : isSorted;
    } else if (isSorted && length) {
      i = _.sortedIndex(array, item);
      return array[i] === item ? i : -1;
    }
    if (item !== item) {
      return _.findIndex(slice.call(array, i), _.isNaN);
    }
    for (; i < length; i++) if (array[i] === item) return i;
    return -1;
  };

  _.lastIndexOf = function(array, item, from) {
    var idx = array ? array.length : 0;
    if (typeof from == 'number') {
      idx = from < 0 ? idx + from + 1 : Math.min(idx, from + 1);
    }
    if (item !== item) {
      return _.findLastIndex(slice.call(array, 0, idx), _.isNaN);
    }
    while (--idx >= 0) if (array[idx] === item) return idx;
    return -1;
  };

  // Generator function to create the findIndex and findLastIndex functions
  function createIndexFinder(dir) {
    return function(array, predicate, context) {
      predicate = cb(predicate, context);
      var length = array != null && array.length;
      var index = dir > 0 ? 0 : length - 1;
      for (; index >= 0 && index < length; index += dir) {
        if (predicate(array[index], index, array)) return index;
      }
      return -1;
    };
  }

  // Returns the first index on an array-like that passes a predicate test
  _.findIndex = createIndexFinder(1);

  _.findLastIndex = createIndexFinder(-1);

  // Use a comparator function to figure out the smallest index at which
  // an object should be inserted so as to maintain order. Uses binary search.
  _.sortedIndex = function(array, obj, iteratee, context) {
    iteratee = cb(iteratee, context, 1);
    var value = iteratee(obj);
    var low = 0, high = array.length;
    while (low < high) {
      var mid = Math.floor((low + high) / 2);
      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
    }
    return low;
  };

  // Generate an integer Array containing an arithmetic progression. A port of
  // the native Python `range()` function. See
  // [the Python documentation](http://docs.python.org/library/functions.html#range).
  _.range = function(start, stop, step) {
    if (arguments.length <= 1) {
      stop = start || 0;
      start = 0;
    }
    step = step || 1;

    var length = Math.max(Math.ceil((stop - start) / step), 0);
    var range = Array(length);

    for (var idx = 0; idx < length; idx++, start += step) {
      range[idx] = start;
    }

    return range;
  };

  // Function (ahem) Functions
  // ------------------

  // Determines whether to execute a function as a constructor
  // or a normal function with the provided arguments
  var executeBound = function(sourceFunc, boundFunc, context, callingContext, args) {
    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
    var self = baseCreate(sourceFunc.prototype);
    var result = sourceFunc.apply(self, args);
    if (_.isObject(result)) return result;
    return self;
  };

  // Create a function bound to a given object (assigning `this`, and arguments,
  // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
  // available.
  _.bind = function(func, context) {
    if (nativeBind && func.bind === nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
    if (!_.isFunction(func)) throw new TypeError('Bind must be called on a function');
    var args = slice.call(arguments, 2);
    var bound = function() {
      return executeBound(func, bound, context, this, args.concat(slice.call(arguments)));
    };
    return bound;
  };

  // Partially apply a function by creating a version that has had some of its
  // arguments pre-filled, without changing its dynamic `this` context. _ acts
  // as a placeholder, allowing any combination of arguments to be pre-filled.
  _.partial = function(func) {
    var boundArgs = slice.call(arguments, 1);
    var bound = function() {
      var position = 0, length = boundArgs.length;
      var args = Array(length);
      for (var i = 0; i < length; i++) {
        args[i] = boundArgs[i] === _ ? arguments[position++] : boundArgs[i];
      }
      while (position < arguments.length) args.push(arguments[position++]);
      return executeBound(func, bound, this, this, args);
    };
    return bound;
  };

  // Bind a number of an object's methods to that object. Remaining arguments
  // are the method names to be bound. Useful for ensuring that all callbacks
  // defined on an object belong to it.
  _.bindAll = function(obj) {
    var i, length = arguments.length, key;
    if (length <= 1) throw new Error('bindAll must be passed function names');
    for (i = 1; i < length; i++) {
      key = arguments[i];
      obj[key] = _.bind(obj[key], obj);
    }
    return obj;
  };

  // Memoize an expensive function by storing its results.
  _.memoize = function(func, hasher) {
    var memoize = function(key) {
      var cache = memoize.cache;
      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
      if (!_.has(cache, address)) cache[address] = func.apply(this, arguments);
      return cache[address];
    };
    memoize.cache = {};
    return memoize;
  };

  // Delays a function for the given number of milliseconds, and then calls
  // it with the arguments supplied.
  _.delay = function(func, wait) {
    var args = slice.call(arguments, 2);
    return setTimeout(function(){
      return func.apply(null, args);
    }, wait);
  };

  // Defers a function, scheduling it to run after the current call stack has
  // cleared.
  _.defer = _.partial(_.delay, _, 1);

  // Returns a function, that, when invoked, will only be triggered at most once
  // during a given window of time. Normally, the throttled function will run
  // as much as it can, without ever going more than once per `wait` duration;
  // but if you'd like to disable the execution on the leading edge, pass
  // `{leading: false}`. To disable execution on the trailing edge, ditto.
  _.throttle = function(func, wait, options) {
    var context, args, result;
    var timeout = null;
    var previous = 0;
    if (!options) options = {};
    var later = function() {
      previous = options.leading === false ? 0 : _.now();
      timeout = null;
      result = func.apply(context, args);
      if (!timeout) context = args = null;
    };
    return function() {
      var now = _.now();
      if (!previous && options.leading === false) previous = now;
      var remaining = wait - (now - previous);
      context = this;
      args = arguments;
      if (remaining <= 0 || remaining > wait) {
        if (timeout) {
          clearTimeout(timeout);
          timeout = null;
        }
        previous = now;
        result = func.apply(context, args);
        if (!timeout) context = args = null;
      } else if (!timeout && options.trailing !== false) {
        timeout = setTimeout(later, remaining);
      }
      return result;
    };
  };

  // Returns a function, that, as long as it continues to be invoked, will not
  // be triggered. The function will be called after it stops being called for
  // N milliseconds. If `immediate` is passed, trigger the function on the
  // leading edge, instead of the trailing.
  _.debounce = function(func, wait, immediate) {
    var timeout, args, context, timestamp, result;

    var later = function() {
      var last = _.now() - timestamp;

      if (last < wait && last >= 0) {
        timeout = setTimeout(later, wait - last);
      } else {
        timeout = null;
        if (!immediate) {
          result = func.apply(context, args);
          if (!timeout) context = args = null;
        }
      }
    };

    return function() {
      context = this;
      args = arguments;
      timestamp = _.now();
      var callNow = immediate && !timeout;
      if (!timeout) timeout = setTimeout(later, wait);
      if (callNow) {
        result = func.apply(context, args);
        context = args = null;
      }

      return result;
    };
  };

  // Returns the first function passed as an argument to the second,
  // allowing you to adjust arguments, run code before and after, and
  // conditionally execute the original function.
  _.wrap = function(func, wrapper) {
    return _.partial(wrapper, func);
  };

  // Returns a negated version of the passed-in predicate.
  _.negate = function(predicate) {
    return function() {
      return !predicate.apply(this, arguments);
    };
  };

  // Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  _.compose = function() {
    var args = arguments;
    var start = args.length - 1;
    return function() {
      var i = start;
      var result = args[start].apply(this, arguments);
      while (i--) result = args[i].call(this, result);
      return result;
    };
  };

  // Returns a function that will only be executed on and after the Nth call.
  _.after = function(times, func) {
    return function() {
      if (--times < 1) {
        return func.apply(this, arguments);
      }
    };
  };

  // Returns a function that will only be executed up to (but not including) the Nth call.
  _.before = function(times, func) {
    var memo;
    return function() {
      if (--times > 0) {
        memo = func.apply(this, arguments);
      }
      if (times <= 1) func = null;
      return memo;
    };
  };

  // Returns a function that will be executed at most one time, no matter how
  // often you call it. Useful for lazy initialization.
  _.once = _.partial(_.before, 2);

  // Object Functions
  // ----------------

  // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
                      'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];

  function collectNonEnumProps(obj, keys) {
    var nonEnumIdx = nonEnumerableProps.length;
    var constructor = obj.constructor;
    var proto = (_.isFunction(constructor) && constructor.prototype) || ObjProto;

    // Constructor is a special case.
    var prop = 'constructor';
    if (_.has(obj, prop) && !_.contains(keys, prop)) keys.push(prop);

    while (nonEnumIdx--) {
      prop = nonEnumerableProps[nonEnumIdx];
      if (prop in obj && obj[prop] !== proto[prop] && !_.contains(keys, prop)) {
        keys.push(prop);
      }
    }
  }

  // Retrieve the names of an object's own properties.
  // Delegates to **ECMAScript 5**'s native `Object.keys`
  _.keys = function(obj) {
    if (!_.isObject(obj)) return [];
    if (nativeKeys) return nativeKeys(obj);
    var keys = [];
    for (var key in obj) if (_.has(obj, key)) keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, keys);
    return keys;
  };

  // Retrieve all the property names of an object.
  _.allKeys = function(obj) {
    if (!_.isObject(obj)) return [];
    var keys = [];
    for (var key in obj) keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, keys);
    return keys;
  };

  // Retrieve the values of an object's properties.
  _.values = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var values = Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[keys[i]];
    }
    return values;
  };

  // Returns the results of applying the iteratee to each element of the object
  // In contrast to _.map it returns an object
  _.mapObject = function(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var keys =  _.keys(obj),
          length = keys.length,
          results = {},
          currentKey;
      for (var index = 0; index < length; index++) {
        currentKey = keys[index];
        results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
      }
      return results;
  };

  // Convert an object into a list of `[key, value]` pairs.
  _.pairs = function(obj) {
    var keys = _.keys(obj);
    var length = keys.length;
    var pairs = Array(length);
    for (var i = 0; i < length; i++) {
      pairs[i] = [keys[i], obj[keys[i]]];
    }
    return pairs;
  };

  // Invert the keys and values of an object. The values must be serializable.
  _.invert = function(obj) {
    var result = {};
    var keys = _.keys(obj);
    for (var i = 0, length = keys.length; i < length; i++) {
      result[obj[keys[i]]] = keys[i];
    }
    return result;
  };

  // Return a sorted list of the function names available on the object.
  // Aliased as `methods`
  _.functions = _.methods = function(obj) {
    var names = [];
    for (var key in obj) {
      if (_.isFunction(obj[key])) names.push(key);
    }
    return names.sort();
  };

  // Extend a given object with all the properties in passed-in object(s).
  _.extend = createAssigner(_.allKeys);

  // Assigns a given object with all the own properties in the passed-in object(s)
  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
  _.extendOwn = _.assign = createAssigner(_.keys);

  // Returns the first key on an object that passes a predicate test
  _.findKey = function(obj, predicate, context) {
    predicate = cb(predicate, context);
    var keys = _.keys(obj), key;
    for (var i = 0, length = keys.length; i < length; i++) {
      key = keys[i];
      if (predicate(obj[key], key, obj)) return key;
    }
  };

  // Return a copy of the object only containing the whitelisted properties.
  _.pick = function(object, oiteratee, context) {
    var result = {}, obj = object, iteratee, keys;
    if (obj == null) return result;
    if (_.isFunction(oiteratee)) {
      keys = _.allKeys(obj);
      iteratee = optimizeCb(oiteratee, context);
    } else {
      keys = flatten(arguments, false, false, 1);
      iteratee = function(value, key, obj) { return key in obj; };
      obj = Object(obj);
    }
    for (var i = 0, length = keys.length; i < length; i++) {
      var key = keys[i];
      var value = obj[key];
      if (iteratee(value, key, obj)) result[key] = value;
    }
    return result;
  };

   // Return a copy of the object without the blacklisted properties.
  _.omit = function(obj, iteratee, context) {
    if (_.isFunction(iteratee)) {
      iteratee = _.negate(iteratee);
    } else {
      var keys = _.map(flatten(arguments, false, false, 1), String);
      iteratee = function(value, key) {
        return !_.contains(keys, key);
      };
    }
    return _.pick(obj, iteratee, context);
  };

  // Fill in a given object with default properties.
  _.defaults = createAssigner(_.allKeys, true);

  // Create a (shallow-cloned) duplicate of an object.
  _.clone = function(obj) {
    if (!_.isObject(obj)) return obj;
    return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
  };

  // Invokes interceptor with the obj, and then returns obj.
  // The primary purpose of this method is to "tap into" a method chain, in
  // order to perform operations on intermediate results within the chain.
  _.tap = function(obj, interceptor) {
    interceptor(obj);
    return obj;
  };

  // Returns whether an object has a given set of `key:value` pairs.
  _.isMatch = function(object, attrs) {
    var keys = _.keys(attrs), length = keys.length;
    if (object == null) return !length;
    var obj = Object(object);
    for (var i = 0; i < length; i++) {
      var key = keys[i];
      if (attrs[key] !== obj[key] || !(key in obj)) return false;
    }
    return true;
  };


  // Internal recursive comparison function for `isEqual`.
  var eq = function(a, b, aStack, bStack) {
    // Identical objects are equal. `0 === -0`, but they aren't identical.
    // See the [Harmony `egal` proposal](http://wiki.ecmascript.org/doku.php?id=harmony:egal).
    if (a === b) return a !== 0 || 1 / a === 1 / b;
    // A strict comparison is necessary because `null == undefined`.
    if (a == null || b == null) return a === b;
    // Unwrap any wrapped objects.
    if (a instanceof _) a = a._wrapped;
    if (b instanceof _) b = b._wrapped;
    // Compare `[[Class]]` names.
    var className = toString.call(a);
    if (className !== toString.call(b)) return false;
    switch (className) {
      // Strings, numbers, regular expressions, dates, and booleans are compared by value.
      case '[object RegExp]':
      // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
      case '[object String]':
        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
        // equivalent to `new String("5")`.
        return '' + a === '' + b;
      case '[object Number]':
        // `NaN`s are equivalent, but non-reflexive.
        // Object(NaN) is equivalent to NaN
        if (+a !== +a) return +b !== +b;
        // An `egal` comparison is performed for other numeric values.
        return +a === 0 ? 1 / +a === 1 / b : +a === +b;
      case '[object Date]':
      case '[object Boolean]':
        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
        // millisecond representations. Note that invalid dates with millisecond representations
        // of `NaN` are not equivalent.
        return +a === +b;
    }

    var areArrays = className === '[object Array]';
    if (!areArrays) {
      if (typeof a != 'object' || typeof b != 'object') return false;

      // Objects with different constructors are not equivalent, but `Object`s or `Array`s
      // from different frames are.
      var aCtor = a.constructor, bCtor = b.constructor;
      if (aCtor !== bCtor && !(_.isFunction(aCtor) && aCtor instanceof aCtor &&
                               _.isFunction(bCtor) && bCtor instanceof bCtor)
                          && ('constructor' in a && 'constructor' in b)) {
        return false;
      }
    }
    // Assume equality for cyclic structures. The algorithm for detecting cyclic
    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
    
    // Initializing stack of traversed objects.
    // It's done here since we only need them for objects and arrays comparison.
    aStack = aStack || [];
    bStack = bStack || [];
    var length = aStack.length;
    while (length--) {
      // Linear search. Performance is inversely proportional to the number of
      // unique nested structures.
      if (aStack[length] === a) return bStack[length] === b;
    }

    // Add the first object to the stack of traversed objects.
    aStack.push(a);
    bStack.push(b);

    // Recursively compare objects and arrays.
    if (areArrays) {
      // Compare array lengths to determine if a deep comparison is necessary.
      length = a.length;
      if (length !== b.length) return false;
      // Deep compare the contents, ignoring non-numeric properties.
      while (length--) {
        if (!eq(a[length], b[length], aStack, bStack)) return false;
      }
    } else {
      // Deep compare objects.
      var keys = _.keys(a), key;
      length = keys.length;
      // Ensure that both objects contain the same number of properties before comparing deep equality.
      if (_.keys(b).length !== length) return false;
      while (length--) {
        // Deep compare each member
        key = keys[length];
        if (!(_.has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
      }
    }
    // Remove the first object from the stack of traversed objects.
    aStack.pop();
    bStack.pop();
    return true;
  };

  // Perform a deep comparison to check if two objects are equal.
  _.isEqual = function(a, b) {
    return eq(a, b);
  };

  // Is a given array, string, or object empty?
  // An "empty" object has no enumerable own-properties.
  _.isEmpty = function(obj) {
    if (obj == null) return true;
    if (isArrayLike(obj) && (_.isArray(obj) || _.isString(obj) || _.isArguments(obj))) return obj.length === 0;
    return _.keys(obj).length === 0;
  };

  // Is a given value a DOM element?
  _.isElement = function(obj) {
    return !!(obj && obj.nodeType === 1);
  };

  // Is a given value an array?
  // Delegates to ECMA5's native Array.isArray
  _.isArray = nativeIsArray || function(obj) {
    return toString.call(obj) === '[object Array]';
  };

  // Is a given variable an object?
  _.isObject = function(obj) {
    var type = typeof obj;
    return type === 'function' || type === 'object' && !!obj;
  };

  // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp, isError.
  _.each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp', 'Error'], function(name) {
    _['is' + name] = function(obj) {
      return toString.call(obj) === '[object ' + name + ']';
    };
  });

  // Define a fallback version of the method in browsers (ahem, IE < 9), where
  // there isn't any inspectable "Arguments" type.
  if (!_.isArguments(arguments)) {
    _.isArguments = function(obj) {
      return _.has(obj, 'callee');
    };
  }

  // Optimize `isFunction` if appropriate. Work around some typeof bugs in old v8,
  // IE 11 (#1621), and in Safari 8 (#1929).
  if (typeof /./ != 'function' && typeof Int8Array != 'object') {
    _.isFunction = function(obj) {
      return typeof obj == 'function' || false;
    };
  }

  // Is a given object a finite number?
  _.isFinite = function(obj) {
    return isFinite(obj) && !isNaN(parseFloat(obj));
  };

  // Is the given value `NaN`? (NaN is the only number which does not equal itself).
  _.isNaN = function(obj) {
    return _.isNumber(obj) && obj !== +obj;
  };

  // Is a given value a boolean?
  _.isBoolean = function(obj) {
    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
  };

  // Is a given value equal to null?
  _.isNull = function(obj) {
    return obj === null;
  };

  // Is a given variable undefined?
  _.isUndefined = function(obj) {
    return obj === void 0;
  };

  // Shortcut function for checking if an object has a given property directly
  // on itself (in other words, not on a prototype).
  _.has = function(obj, key) {
    return obj != null && hasOwnProperty.call(obj, key);
  };

  // Utility Functions
  // -----------------

  // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
  // previous owner. Returns a reference to the Underscore object.
  _.noConflict = function() {
    root._ = previousUnderscore;
    return this;
  };

  // Keep the identity function around for default iteratees.
  _.identity = function(value) {
    return value;
  };

  // Predicate-generating functions. Often useful outside of Underscore.
  _.constant = function(value) {
    return function() {
      return value;
    };
  };

  _.noop = function(){};

  _.property = function(key) {
    return function(obj) {
      return obj == null ? void 0 : obj[key];
    };
  };

  // Generates a function for a given object that returns a given property.
  _.propertyOf = function(obj) {
    return obj == null ? function(){} : function(key) {
      return obj[key];
    };
  };

  // Returns a predicate for checking whether an object has a given set of 
  // `key:value` pairs.
  _.matcher = _.matches = function(attrs) {
    attrs = _.extendOwn({}, attrs);
    return function(obj) {
      return _.isMatch(obj, attrs);
    };
  };

  // Run a function **n** times.
  _.times = function(n, iteratee, context) {
    var accum = Array(Math.max(0, n));
    iteratee = optimizeCb(iteratee, context, 1);
    for (var i = 0; i < n; i++) accum[i] = iteratee(i);
    return accum;
  };

  // Return a random integer between min and max (inclusive).
  _.random = function(min, max) {
    if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  };

  // A (possibly faster) way to get the current timestamp as an integer.
  _.now = Date.now || function() {
    return new Date().getTime();
  };

   // List of HTML entities for escaping.
  var escapeMap = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#x27;',
    '`': '&#x60;'
  };
  var unescapeMap = _.invert(escapeMap);

  // Functions for escaping and unescaping strings to/from HTML interpolation.
  var createEscaper = function(map) {
    var escaper = function(match) {
      return map[match];
    };
    // Regexes for identifying a key that needs to be escaped
    var source = '(?:' + _.keys(map).join('|') + ')';
    var testRegexp = RegExp(source);
    var replaceRegexp = RegExp(source, 'g');
    return function(string) {
      string = string == null ? '' : '' + string;
      return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
    };
  };
  _.escape = createEscaper(escapeMap);
  _.unescape = createEscaper(unescapeMap);

  // If the value of the named `property` is a function then invoke it with the
  // `object` as context; otherwise, return it.
  _.result = function(object, property, fallback) {
    var value = object == null ? void 0 : object[property];
    if (value === void 0) {
      value = fallback;
    }
    return _.isFunction(value) ? value.call(object) : value;
  };

  // Generate a unique integer id (unique within the entire client session).
  // Useful for temporary DOM ids.
  var idCounter = 0;
  _.uniqueId = function(prefix) {
    var id = ++idCounter + '';
    return prefix ? prefix + id : id;
  };

  // By default, Underscore uses ERB-style template delimiters, change the
  // following template settings to use alternative delimiters.
  _.templateSettings = {
    evaluate    : /<%([\s\S]+?)%>/g,
    interpolate : /<%=([\s\S]+?)%>/g,
    escape      : /<%-([\s\S]+?)%>/g
  };

  // When customizing `templateSettings`, if you don't want to define an
  // interpolation, evaluation or escaping regex, we need one that is
  // guaranteed not to match.
  var noMatch = /(.)^/;

  // Certain characters need to be escaped so that they can be put into a
  // string literal.
  var escapes = {
    "'":      "'",
    '\\':     '\\',
    '\r':     'r',
    '\n':     'n',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

  var escaper = /\\|'|\r|\n|\u2028|\u2029/g;

  var escapeChar = function(match) {
    return '\\' + escapes[match];
  };

  // JavaScript micro-templating, similar to John Resig's implementation.
  // Underscore templating handles arbitrary delimiters, preserves whitespace,
  // and correctly escapes quotes within interpolated code.
  // NB: `oldSettings` only exists for backwards compatibility.
  _.template = function(text, settings, oldSettings) {
    if (!settings && oldSettings) settings = oldSettings;
    settings = _.defaults({}, settings, _.templateSettings);

    // Combine delimiters into one regular expression via alternation.
    var matcher = RegExp([
      (settings.escape || noMatch).source,
      (settings.interpolate || noMatch).source,
      (settings.evaluate || noMatch).source
    ].join('|') + '|$', 'g');

    // Compile the template source, escaping string literals appropriately.
    var index = 0;
    var source = "__p+='";
    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
      source += text.slice(index, offset).replace(escaper, escapeChar);
      index = offset + match.length;

      if (escape) {
        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
      } else if (interpolate) {
        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
      } else if (evaluate) {
        source += "';\n" + evaluate + "\n__p+='";
      }

      // Adobe VMs need the match returned to produce the correct offest.
      return match;
    });
    source += "';\n";

    // If a variable is not specified, place data values in local scope.
    if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';

    source = "var __t,__p='',__j=Array.prototype.join," +
      "print=function(){__p+=__j.call(arguments,'');};\n" +
      source + 'return __p;\n';

    try {
      var render = new Function(settings.variable || 'obj', '_', source);
    } catch (e) {
      e.source = source;
      throw e;
    }

    var template = function(data) {
      return render.call(this, data, _);
    };

    // Provide the compiled source as a convenience for precompilation.
    var argument = settings.variable || 'obj';
    template.source = 'function(' + argument + '){\n' + source + '}';

    return template;
  };

  // Add a "chain" function. Start chaining a wrapped Underscore object.
  _.chain = function(obj) {
    var instance = _(obj);
    instance._chain = true;
    return instance;
  };

  // OOP
  // ---------------
  // If Underscore is called as a function, it returns a wrapped object that
  // can be used OO-style. This wrapper holds altered versions of all the
  // underscore functions. Wrapped objects may be chained.

  // Helper function to continue chaining intermediate results.
  var result = function(instance, obj) {
    return instance._chain ? _(obj).chain() : obj;
  };

  // Add your own custom functions to the Underscore object.
  _.mixin = function(obj) {
    _.each(_.functions(obj), function(name) {
      var func = _[name] = obj[name];
      _.prototype[name] = function() {
        var args = [this._wrapped];
        push.apply(args, arguments);
        return result(this, func.apply(_, args));
      };
    });
  };

  // Add all of the Underscore functions to the wrapper object.
  _.mixin(_);

  // Add all mutator Array functions to the wrapper.
  _.each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      var obj = this._wrapped;
      method.apply(obj, arguments);
      if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];
      return result(this, obj);
    };
  });

  // Add all accessor Array functions to the wrapper.
  _.each(['concat', 'join', 'slice'], function(name) {
    var method = ArrayProto[name];
    _.prototype[name] = function() {
      return result(this, method.apply(this._wrapped, arguments));
    };
  });

  // Extracts the result from a wrapped and chained object.
  _.prototype.value = function() {
    return this._wrapped;
  };

  // Provide unwrapping proxy for some methods used in engine operations
  // such as arithmetic and JSON stringification.
  _.prototype.valueOf = _.prototype.toJSON = _.prototype.value;
  
  _.prototype.toString = function() {
    return '' + this._wrapped;
  };

  // AMD registration happens at the end for compatibility with AMD loaders
  // that may not enforce next-turn semantics on modules. Even though general
  // practice for AMD registration is to be anonymous, underscore registers
  // as a named module because, like jQuery, it is a base library that is
  // popular enough to be bundled in a third party lib, but not be part of
  // an AMD load request. Those cases could generate an error when an
  // anonymous define() is called outside of a loader request.
  if (typeof define === 'function' && define.amd) {
    define('underscore', [], function() {
      return _;
    });
  }
}.call(this));

},{}],10:[function(require,module,exports){
// created by @HenrikJoreteg
var prefix;

if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
    prefix = 'moz';
} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
    prefix = 'webkit';
}

var PC = window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
var MediaStream = window.webkitMediaStream || window.MediaStream;
var screenSharing = window.location.protocol === 'https:' &&
    ((window.navigator.userAgent.match('Chrome') && parseInt(window.navigator.userAgent.match(/Chrome\/(.*) /)[1], 10) >= 26) ||
     (window.navigator.userAgent.match('Firefox') && parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10) >= 33));
var AudioContext = window.AudioContext || window.webkitAudioContext;
var supportVp8 = document.createElement('video').canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;

// export support flags and constructors.prototype && PC
module.exports = {
    prefix: prefix,
    support: !!PC && supportVp8 && !!getUserMedia,
    // new support style
    supportRTCPeerConnection: !!PC,
    supportVp8: supportVp8,
    supportGetUserMedia: !!getUserMedia,
    supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
    supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
    supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
    supportScreenSharing: !!screenSharing,
    // old deprecated style. Dont use this anymore
    dataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
    webAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
    mediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
    screenSharing: !!screenSharing,
    // constructors
    AudioContext: AudioContext,
    PeerConnection: PC,
    SessionDescription: SessionDescription,
    IceCandidate: IceCandidate,
    MediaStream: MediaStream,
    getUserMedia: getUserMedia
};

},{}],11:[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() {
    this.callbacks = {};
}

// Listen on the given `event` with `fn`. Store a group name if present.
WildEmitter.prototype.on = function (event, groupName, fn) {
    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.
WildEmitter.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
WildEmitter.prototype.releaseGroup = function (groupName) {
    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.
WildEmitter.prototype.off = function (event, fn) {
    var callbacks = this.callbacks[event],
        i;

    if (!callbacks) return this;

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

    // remove specific handler
    i = callbacks.indexOf(fn);
    callbacks.splice(i, 1);
    return this;
};

/// Emit `event` with the given args.
// also calls any `*` handlers
WildEmitter.prototype.emit = function (event) {
    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]) {
                listeners[i].apply(this, args);
            } else {
                break;
            }
        }
    }

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

    return this;
};

// Helper for for finding special wildcard event handlers that match the event
WildEmitter.prototype.getWildcardCallbacks = function (eventName) {
    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;
};

},{}],12:[function(require,module,exports){
var _ = require('underscore');
var util = require('util');
var webrtc = require('webrtcsupport');
var SJJ = require('sdp-jingle-json');
var WildEmitter = require('wildemitter');
var peerconn = require('traceablepeerconnection');

function PeerConnection(config, constraints) {
    var self = this;
    var item;
    WildEmitter.call(this);

    config = config || {};
    config.iceServers = config.iceServers || [];

    // make sure this only gets enabled in Google Chrome
    // EXPERIMENTAL FLAG, might get removed without notice
    this.enableChromeNativeSimulcast = false;
    if (constraints && constraints.optional &&
            webrtc.prefix === 'webkit' &&
            navigator.appVersion.match(/Chromium\//) === null) {
        constraints.optional.forEach(function (constraint, idx) {
            if (constraint.enableChromeNativeSimulcast) {
                self.enableChromeNativeSimulcast = true;
            }
        });
    }

    // EXPERIMENTAL FLAG, might get removed without notice
    this.enableMultiStreamHacks = false;
    if (constraints && constraints.optional) {
        constraints.optional.forEach(function (constraint, idx) {
            if (constraint.enableMultiStreamHacks) {
                self.enableMultiStreamHacks = true;
            }
        });
    }
    // EXPERIMENTAL FLAG, might get removed without notice
    this.restrictBandwidth = 0;
    if (constraints && constraints.optional) {
        constraints.optional.forEach(function (constraint, idx) {
            if (constraint.andyetRestrictBandwidth) {
                self.restrictBandwidth = constraint.andyetRestrictBandwidth;
            }
        });
    }

    // EXPERIMENTAL FLAG, might get removed without notice
    // bundle up ice candidates, only works for jingle mode
    // number > 0 is the delay to wait for additional candidates
    // ~20ms seems good
    this.batchIceCandidates = 0;
    if (constraints && constraints.optional) {
        constraints.optional.forEach(function (constraint, idx) {
            if (constraint.andyetBatchIce) {
                self.batchIceCandidates = constraint.andyetBatchIce;
            }
        });
    }
    this.batchedIceCandidates = [];

    // EXPERIMENTAL FLAG, might get removed without notice
    this.assumeSetLocalSuccess = false;
    if (constraints && constraints.optional) {
        constraints.optional.forEach(function (constraint, idx) {
            if (constraint.andyetAssumeSetLocalSuccess) {
                self.assumeSetLocalSuccess = constraint.andyetAssumeSetLocalSuccess;
            }
        });
    }

    // EXPERIMENTAL FLAG, might get removed without notice
    // working around https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
    // pass in a timeout for this
    if (webrtc.prefix === 'moz') {
        if (constraints && constraints.optional) {
            this.wtFirefox = 0;
            constraints.optional.forEach(function (constraint, idx) {
                if (constraint.andyetFirefoxMakesMeSad) {
                    self.wtFirefox = constraint.andyetFirefoxMakesMeSad;
                    if (self.wtFirefox > 0) {
                        self.firefoxcandidatebuffer = [];
                    }
                }
            });
        }
    }


    this.pc = new peerconn(config, constraints);

    this.getLocalStreams = this.pc.getLocalStreams.bind(this.pc);
    this.getRemoteStreams = this.pc.getRemoteStreams.bind(this.pc);
    this.addStream = this.pc.addStream.bind(this.pc);
    this.removeStream = this.pc.removeStream.bind(this.pc);

    // proxy events 
    this.pc.on('*', function () {
        self.emit.apply(self, arguments);
    });

    // proxy some events directly
    this.pc.onremovestream = this.emit.bind(this, 'removeStream');
    this.pc.onaddstream = this.emit.bind(this, 'addStream');
    this.pc.onnegotiationneeded = this.emit.bind(this, 'negotiationNeeded');
    this.pc.oniceconnectionstatechange = this.emit.bind(this, 'iceConnectionStateChange');
    this.pc.onsignalingstatechange = this.emit.bind(this, 'signalingStateChange');

    // handle ice candidate and data channel events
    this.pc.onicecandidate = this._onIce.bind(this);
    this.pc.ondatachannel = this._onDataChannel.bind(this);

    this.localDescription = {
        contents: []
    };
    this.remoteDescription = {
        contents: []
    };

    this.config = {
        debug: false,
        ice: {},
        sid: '',
        isInitiator: true,
        sdpSessionID: Date.now(),
        useJingle: false
    };

    // apply our config
    for (item in config) {
        this.config[item] = config[item];
    }

    if (this.config.debug) {
        this.on('*', function (eventName, event) {
            var logger = config.logger || console;
            logger.log('PeerConnection event:', arguments);
        });
    }
    this.hadLocalStunCandidate = false;
    this.hadRemoteStunCandidate = false;
    this.hadLocalRelayCandidate = false;
    this.hadRemoteRelayCandidate = false;

    this.hadLocalIPv6Candidate = false;
    this.hadRemoteIPv6Candidate = false;

    // keeping references for all our data channels
    // so they dont get garbage collected
    // can be removed once the following bugs have been fixed
    // https://crbug.com/405545 
    // https://bugzilla.mozilla.org/show_bug.cgi?id=964092
    // to be filed for opera
    this._remoteDataChannels = [];
    this._localDataChannels = [];
}

util.inherits(PeerConnection, WildEmitter);

Object.defineProperty(PeerConnection.prototype, 'signalingState', {
    get: function () {
        return this.pc.signalingState;
    }
});
Object.defineProperty(PeerConnection.prototype, 'iceConnectionState', {
    get: function () {
        return this.pc.iceConnectionState;
    }
});

PeerConnection.prototype._role = function () {
    return this.isInitiator ? 'initiator' : 'responder';
};

// Add a stream to the peer connection object
PeerConnection.prototype.addStream = function (stream) {
    this.localStream = stream;
    this.pc.addStream(stream);
};

// helper function to check if a remote candidate is a stun/relay
// candidate or an ipv6 candidate
PeerConnection.prototype._checkLocalCandidate = function (candidate) {
    var cand = SJJ.toCandidateJSON(candidate);
    if (cand.type == 'srflx') {
        this.hadLocalStunCandidate = true;
    } else if (cand.type == 'relay') {
        this.hadLocalRelayCandidate = true;
    }
    if (cand.ip.indexOf(':') != -1) {
        this.hadLocalIPv6Candidate = true;
    }
};

// helper function to check if a remote candidate is a stun/relay
// candidate or an ipv6 candidate
PeerConnection.prototype._checkRemoteCandidate = function (candidate) {
    var cand = SJJ.toCandidateJSON(candidate);
    if (cand.type == 'srflx') {
        this.hadRemoteStunCandidate = true;
    } else if (cand.type == 'relay') {
        this.hadRemoteRelayCandidate = true;
    }
    if (cand.ip.indexOf(':') != -1) {
        this.hadRemoteIPv6Candidate = true;
    }
};


// Init and add ice candidate object with correct constructor
PeerConnection.prototype.processIce = function (update, cb) {
    cb = cb || function () {};
    var self = this;

    // ignore any added ice candidates to avoid errors. why does the
    // spec not do this?
    if (this.pc.signalingState === 'closed') return cb();

    if (update.contents || (update.jingle && update.jingle.contents)) {
        var contentNames = _.pluck(this.remoteDescription.contents, 'name');
        var contents = update.contents || update.jingle.contents;

        contents.forEach(function (content) {
            var transport = content.transport || {};
            var candidates = transport.candidates || [];
            var mline = contentNames.indexOf(content.name);
            var mid = content.name;

            candidates.forEach(
                function (candidate) {
                var iceCandidate = SJJ.toCandidateSDP(candidate) + '\r\n';
                self.pc.addIceCandidate(
                    new webrtc.IceCandidate({
                        candidate: iceCandidate,
                        sdpMLineIndex: mline,
                        sdpMid: mid
                    }), function () {
                        // well, this success callback is pretty meaningless
                    },
                    function (err) {
                        self.emit('error', err);
                    }
                );
                self._checkRemoteCandidate(iceCandidate);
            });
        });
    } else {
        // working around https://code.google.com/p/webrtc/issues/detail?id=3669
        if (update.candidate && update.candidate.candidate.indexOf('a=') !== 0) {
            update.candidate.candidate = 'a=' + update.candidate.candidate;
        }

        if (this.wtFirefox && this.firefoxcandidatebuffer !== null) {
            // we cant add this yet due to https://bugzilla.mozilla.org/show_bug.cgi?id=1087551
            if (this.pc.localDescription && this.pc.localDescription.type === 'offer') {
                this.firefoxcandidatebuffer.push(update.candidate);
                return cb();
            }
        }

        self.pc.addIceCandidate(
            new webrtc.IceCandidate(update.candidate),
            function () { },
            function (err) {
                self.emit('error', err);
            }
        );
        self._checkRemoteCandidate(update.candidate.candidate);
    }
    cb();
};

// Generate and emit an offer with the given constraints
PeerConnection.prototype.offer = function (constraints, cb) {
    var self = this;
    var hasConstraints = arguments.length === 2;
    var mediaConstraints = hasConstraints ? constraints : {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: true
            }
        };
    cb = hasConstraints ? cb : constraints;
    cb = cb || function () {};

    if (this.pc.signalingState === 'closed') return cb('Already closed');

    // Actually generate the offer
    this.pc.createOffer(
        function (offer) {
            // does not work for jingle, but jingle.js doesn't need
            // this hack...
            var expandedOffer = {
                type: 'offer',
                sdp: offer.sdp
            };
            if (self.assumeSetLocalSuccess) {
                self.emit('offer', expandedOffer);
                cb(null, expandedOffer);
            }
            self.pc.setLocalDescription(offer,
                function () {
                    var jingle;
                    if (self.config.useJingle) {
                        jingle = SJJ.toSessionJSON(offer.sdp, {
                            role: self._role(),
                            direction: 'outgoing'
                        });
                        jingle.sid = self.config.sid;
                        self.localDescription = jingle;

                        // Save ICE credentials
                        _.each(jingle.contents, function (content) {
                            var transport = content.transport || {};
                            if (transport.ufrag) {
                                self.config.ice[content.name] = {
                                    ufrag: transport.ufrag,
                                    pwd: transport.pwd
                                };
                            }
                        });

                        expandedOffer.jingle = jingle;
                    }
                    expandedOffer.sdp.split('\r\n').forEach(function (line) {
                        if (line.indexOf('a=candidate:') === 0) {
                            self._checkLocalCandidate(line);
                        }
                    });

                    if (!self.assumeSetLocalSuccess) {
                        self.emit('offer', expandedOffer);
                        cb(null, expandedOffer);
                    }
                },
                function (err) {
                    self.emit('error', err);
                    cb(err);
                }
            );
        },
        function (err) {
            self.emit('error', err);
            cb(err);
        },
        mediaConstraints
    );
};


// Process an incoming offer so that ICE may proceed before deciding
// to answer the request.
PeerConnection.prototype.handleOffer = function (offer, cb) {
    cb = cb || function () {};
    var self = this;
    offer.type = 'offer';
    if (offer.jingle) {
        if (this.enableChromeNativeSimulcast) {
            offer.jingle.contents.forEach(function (content) {
                if (content.name === 'video') {
                    content.description.googConferenceFlag = true;
                }
            });
        }
        if (this.enableMultiStreamHacks) {
            // add a mixed video stream as first stream
            offer.jingle.contents.forEach(function (content) {
                if (content.name === 'video') {
                    var sources = content.description.sources || [];
                    if (sources.length === 0 || sources[0].ssrc !== "3735928559") {
                        sources.unshift({
                            ssrc: "3735928559", // 0xdeadbeef
                            parameters: [
                                {
                                    key: "cname",
                                    value: "deadbeef"
                                },
                                {
                                    key: "msid",
                                    value: "mixyourfecintothis please"
                                }
                            ]
                        });
                        content.description.sources = sources;
                    }
                }
            });
        }
        if (self.restrictBandwidth > 0) {
            if (offer.jingle.contents.length >= 2 && offer.jingle.contents[1].name === 'video') {
                var content = offer.jingle.contents[1];
                var hasBw = content.description && content.description.bandwidth;
                if (!hasBw) {
                    offer.jingle.contents[1].description.bandwidth = { type:'AS', bandwidth: self.restrictBandwidth.toString() };
                    offer.sdp = SJJ.toSessionSDP(offer.jingle, {
                        sid: self.config.sdpSessionID,
                        role: self._role(),
                        direction: 'outgoing'
                    });
                }
            }
        }
        offer.sdp = SJJ.toSessionSDP(offer.jingle, {
            sid: self.config.sdpSessionID,
            role: self._role(),
            direction: 'incoming'
        });
        self.remoteDescription = offer.jingle;
    }
    offer.sdp.split('\r\n').forEach(function (line) {
        if (line.indexOf('a=candidate:') === 0) {
            self._checkRemoteCandidate(line);
        }
    });
    self.pc.setRemoteDescription(new webrtc.SessionDescription(offer),
        function () {
            cb();
        },
        cb
    );
};

// Answer an offer with audio only
PeerConnection.prototype.answerAudioOnly = function (cb) {
    var mediaConstraints = {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: false
            }
        };
    this._answer(mediaConstraints, cb);
};

// Answer an offer without offering to recieve
PeerConnection.prototype.answerBroadcastOnly = function (cb) {
    var mediaConstraints = {
            mandatory: {
                OfferToReceiveAudio: false,
                OfferToReceiveVideo: false
            }
        };
    this._answer(mediaConstraints, cb);
};

// Answer an offer with given constraints default is audio/video
PeerConnection.prototype.answer = function (constraints, cb) {
    var self = this;
    var hasConstraints = arguments.length === 2;
    var callback = hasConstraints ? cb : constraints;
    var mediaConstraints = hasConstraints ? constraints : {
            mandatory: {
                OfferToReceiveAudio: true,
                OfferToReceiveVideo: true
            }
        };

    this._answer(mediaConstraints, callback);
};

// Process an answer
PeerConnection.prototype.handleAnswer = function (answer, cb) {
    cb = cb || function () {};
    var self = this;
    if (answer.jingle) {
        answer.sdp = SJJ.toSessionSDP(answer.jingle, {
            sid: self.config.sdpSessionID,
            role: self._role(),
            direction: 'incoming'
        });
        self.remoteDescription = answer.jingle;
    }
    answer.sdp.split('\r\n').forEach(function (line) {
        if (line.indexOf('a=candidate:') === 0) {
            self._checkRemoteCandidate(line);
        }
    });
    self.pc.setRemoteDescription(
        new webrtc.SessionDescription(answer),
        function () {
            if (self.wtFirefox) {
                window.setTimeout(function () {
                    self.firefoxcandidatebuffer.forEach(function (candidate) {
                        // add candidates later
                        self.pc.addIceCandidate(
                            new webrtc.IceCandidate(candidate),
                            function () { },
                            function (err) {
                                self.emit('error', err);
                            }
                        );
                        self._checkRemoteCandidate(candidate.candidate);
                    });
                    self.firefoxcandidatebuffer = null;
                }, self.wtFirefox);
            }
            cb(null);
        },
        cb
    );
};

// Close the peer connection
PeerConnection.prototype.close = function () {
    this.pc.close();

    this._localDataChannels = [];
    this._remoteDataChannels = [];

    this.emit('close');
};

// Internal code sharing for various types of answer methods
PeerConnection.prototype._answer = function (constraints, cb) {
    cb = cb || function () {};
    var self = this;
    if (!this.pc.remoteDescription) {
        // the old API is used, call handleOffer
        throw new Error('remoteDescription not set');
    }

    if (this.pc.signalingState === 'closed') return cb('Already closed');

    self.pc.createAnswer(
        function (answer) {
            var sim = [];
            var rtx = [];
            if (self.enableChromeNativeSimulcast) {
                // native simulcast part 1: add another SSRC
                answer.jingle = SJJ.toSessionJSON(answer.sdp, {
                    role: self._role(),
                    direction: 'outgoing'
                });
                if (answer.jingle.contents.length >= 2 && answer.jingle.contents[1].name === 'video') {
                    var hasSimgroup = false;
                    var groups = answer.jingle.contents[1].description.sourceGroups || [];
                    var hasSim = false;
                    groups.forEach(function (group) {
                        if (group.semantics == 'SIM') hasSim = true;
                    });
                    if (!hasSim &&
                        answer.jingle.contents[1].description.sources.length) {
                        var newssrc = JSON.parse(JSON.stringify(answer.jingle.contents[1].description.sources[0]));
                        newssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
                        answer.jingle.contents[1].description.sources.push(newssrc);

                        sim.push(answer.jingle.contents[1].description.sources[0].ssrc);
                        sim.push(newssrc.ssrc);
                        groups.push({
                            semantics: 'SIM',
                            sources: sim
                        });

                        // also create an RTX one for the SIM one
                        var rtxssrc = JSON.parse(JSON.stringify(newssrc));
                        rtxssrc.ssrc = '' + Math.floor(Math.random() * 0xffffffff); // FIXME: look for conflicts
                        answer.jingle.contents[1].description.sources.push(rtxssrc);
                        groups.push({
                            semantics: 'FID',
                            sources: [newssrc.ssrc, rtxssrc.ssrc]
                        });

                        answer.jingle.contents[1].description.sourceGroups = groups;
                        answer.sdp = SJJ.toSessionSDP(answer.jingle, {
                            sid: self.config.sdpSessionID,
                            role: self._role(),
                            direction: 'outgoing'
                        });
                    }
                }
            }
            var expandedAnswer = {
                type: 'answer',
                sdp: answer.sdp
            };
            if (self.assumeSetLocalSuccess) {
                // not safe to do when doing simulcast mangling
                self.emit('answer', expandedAnswer);
                cb(null, expandedAnswer);
            }
            self.pc.setLocalDescription(answer,
                function () {
                    if (self.config.useJingle) {
                        var jingle = SJJ.toSessionJSON(answer.sdp, {
                            role: self._role(),
                            direction: 'outgoing'
                        });
                        jingle.sid = self.config.sid;
                        self.localDescription = jingle;
                        expandedAnswer.jingle = jingle;
                    }
                    if (self.enableChromeNativeSimulcast) {
                        // native simulcast part 2: 
                        // signal multiple tracks to the receiver
                        // for anything in the SIM group
                        if (!expandedAnswer.jingle) {
                            expandedAnswer.jingle = SJJ.toSessionJSON(answer.sdp, {
                                role: self._role(),
                                direction: 'outgoing'
                            });
                        }
                        var groups = expandedAnswer.jingle.contents[1].description.sourceGroups || [];
                        expandedAnswer.jingle.contents[1].description.sources.forEach(function (source, idx) {
                            // the floor idx/2 is a hack that relies on a particular order
                            // of groups, alternating between sim and rtx
                            source.parameters = source.parameters.map(function (parameter) {
                                if (parameter.key === 'msid') {
                                    parameter.value += '-' + Math.floor(idx / 2);
                                }
                                return parameter;
                            });
                        });
                        expandedAnswer.sdp = SJJ.toSessionSDP(expandedAnswer.jingle, {
                            sid: self.sdpSessionID,
                            role: self._role(),
                            direction: 'outgoing'
                        });
                    }
                    expandedAnswer.sdp.split('\r\n').forEach(function (line) {
                        if (line.indexOf('a=candidate:') === 0) {
                            self._checkLocalCandidate(line);
                        }
                    });
                    if (!self.assumeSetLocalSuccess) {
                        self.emit('answer', expandedAnswer);
                        cb(null, expandedAnswer);
                    }
                },
                function (err) {
                    self.emit('error', err);
                    cb(err);
                }
            );
        },
        function (err) {
            self.emit('error', err);
            cb(err);
        },
        constraints
    );
};

// Internal method for emitting ice candidates on our peer object
PeerConnection.prototype._onIce = function (event) {
    var self = this;
    if (event.candidate) {
        var ice = event.candidate;

        var expandedCandidate = {
            candidate: {
                candidate: ice.candidate,
                sdpMid: ice.sdpMid,
                sdpMLineIndex: ice.sdpMLineIndex
            }
        };
        this._checkLocalCandidate(ice.candidate);

        var cand = SJJ.toCandidateJSON(ice.candidate);
        if (self.config.useJingle) {
            if (!ice.sdpMid) { // firefox doesn't set this
                ice.sdpMid = self.localDescription.contents[ice.sdpMLineIndex].name;
            }
            if (!self.config.ice[ice.sdpMid]) {
                var jingle = SJJ.toSessionJSON(self.pc.localDescription.sdp, {
                    role: self._role(),
                    direction: 'outgoing'
                });
                _.each(jingle.contents, function (content) {
                    var transport = content.transport || {};
                    if (transport.ufrag) {
                        self.config.ice[content.name] = {
                            ufrag: transport.ufrag,
                            pwd: transport.pwd
                        };
                    }
                });
            }
            expandedCandidate.jingle = {
                contents: [{
                    name: ice.sdpMid,
                    creator: self._role(),
                    transport: {
                        transType: 'iceUdp',
                        ufrag: self.config.ice[ice.sdpMid].ufrag,
                        pwd: self.config.ice[ice.sdpMid].pwd,
                        candidates: [
                            cand
                        ]
                    }
                }]
            };
            if (self.batchIceCandidates > 0) {
                if (self.batchedIceCandidates.length === 0) {
                    window.setTimeout(function () {
                        var contents = {};
                        self.batchedIceCandidates.forEach(function (content) {
                            content = content.contents[0];
                            if (!contents[content.name]) contents[content.name] = content;
                            contents[content.name].transport.candidates.push(content.transport.candidates[0]);
                        });
                        var newCand = { 
                            jingle: {
                                contents: []
                            }
                        };
                        Object.keys(contents).forEach(function (name) {
                            newCand.jingle.contents.push(contents[name]);
                        });
                        self.batchedIceCandidates = [];
                        self.emit('ice', newCand);
                    }, self.batchIceCandidates);
                }
                self.batchedIceCandidates.push(expandedCandidate.jingle);
                return;
            }

        }
        this.emit('ice', expandedCandidate);
    } else {
        this.emit('endOfCandidates');
    }
};

// Internal method for processing a new data channel being added by the
// other peer.
PeerConnection.prototype._onDataChannel = function (event) {
    // make sure we keep a reference so this doesn't get garbage collected
    var channel = event.channel;
    this._remoteDataChannels.push(channel);

    this.emit('addChannel', channel);
};

// Create a data channel spec reference:
// http://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCDataChannelInit
PeerConnection.prototype.createDataChannel = function (name, opts) {
    var channel = this.pc.createDataChannel(name, opts);

    // make sure we keep a reference so this doesn't get garbage collected
    this._localDataChannels.push(channel);

    return channel;
};

// a wrapper around getStats which hides the differences (where possible)
PeerConnection.prototype.getStats = function (cb) {
    if (webrtc.prefix === 'moz') {
        this.pc.getStats(
            function (res) {
                var items = [];
                for (var result in res) {
                    if (typeof res[result] === 'object') {
                        items.push(res[result]);
                    }
                }
                cb(null, items);
            },
            cb
        );
    } else {
        this.pc.getStats(function (res) {
            var items = [];
            res.result().forEach(function (result) {
                var item = {};
                result.names().forEach(function (name) {
                    item[name] = result.stat(name);
                });
                item.id = result.id;
                item.type = result.type;
                item.timestamp = result.timestamp;
                items.push(item);
            });
            cb(null, items);
        });
    }
};

module.exports = PeerConnection;

},{"sdp-jingle-json":3,"traceablepeerconnection":8,"underscore":9,"util":2,"webrtcsupport":10,"wildemitter":11}]},{},[12])
(12)
});
;