localmedia/localMedia.bundle.js

(function(e){if("function"==typeof bootstrap)bootstrap("localmedia",e);else if("object"==typeof exports)module.exports=e();else if("function"==typeof define&&define.amd)define(e);else if("undefined"!=typeof ses){if(!ses.ok())return;ses.makeLocalMedia=e}else"undefined"!=typeof window?window.LocalMedia=e():global.LocalMedia=e()})(function(){var define,ses,bootstrap,module,exports;
return (function(e,t,n){function i(n,s){if(!t[n]){if(!e[n]){var o=typeof require=="function"&&require;if(!s&&o)return o(n,!0);if(r)return r(n,!0);throw new Error("Cannot find module '"+n+"'")}var u=t[n]={exports:{}};e[n][0].call(u.exports,function(t){var r=e[n][1][t];return i(r?r:t)},u,u.exports)}return t[n].exports}var r=typeof require=="function"&&require;for(var s=0;s<n.length;s++)i(n[s]);return i})({1:[function(require,module,exports){
var util = require('util');
var hark = require('hark');
var webrtcSupport = require('webrtcsupport');
var getUserMedia = require('getusermedia');
var getScreenMedia = require('getscreenmedia');
var WildEmitter = require('wildemitter');
var GainController = require('mediastream-gain');
var mockconsole = require('mockconsole');


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

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

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

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

    this.screenSharingSupport = webrtcSupport.screenSharing;

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

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

util.inherits(LocalMedia, WildEmitter);


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

    getUserMedia(constraints, function (err, stream) {

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

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

            // TODO: might need to migrate to the video tracks onended
            // FIXME: firefox does not seem to trigger this...
            stream.onended = function () {
                /*
                var idx = self.localStreams.indexOf(stream);
                if (idx > -1) {
                    self.localScreens.splice(idx, 1);
                }
                self.emit('localStreamStopped', stream);
                */
            };

            self.emit('localStream', stream);
        } else {
            // Fallback for users without a camera
            if (self.config.audioFallback && err.name === 'DevicesNotFoundError' && constraints.video !== false) {
                constraints.video = false;
                self.start(constraints, cb);
                return;
            }
        }
        if (cb) {
            return cb(err, stream);
        }
    });
};

LocalMedia.prototype.stop = function (stream) {
    var self = this;
    // FIXME: duplicates cleanup code until fixed in FF
    if (stream) {
        stream.getTracks().forEach(function (track) { track.stop(); });
        var idx = self.localStreams.indexOf(stream);
        if (idx > -1) {
            self.emit('localStreamStopped', stream);
            self.localStreams = self.localStreams.splice(idx, 1);
        } else {
            idx = self.localScreens.indexOf(stream);
            if (idx > -1) {
                self.emit('localScreenStopped', stream);
                self.localScreens = self.localScreens.splice(idx, 1);
            }
        }
    } else {
        this.stopStreams();
        this.stopScreenShare();
    }
};

LocalMedia.prototype.stopStreams = function () {
    var self = this;
    if (this.audioMonitor) {
        this.audioMonitor.stop();
        delete this.audioMonitor;
    }
    this.localStreams.forEach(function (stream) {
        stream.getTracks().forEach(function (track) { track.stop(); });
        self.emit('localStreamStopped', stream);
    });
    this.localStreams = [];
};

LocalMedia.prototype.startScreenShare = function (cb) {
    var self = this;
    getScreenMedia(function (err, stream) {
        if (!err) {
            self.localScreens.push(stream);

            // TODO: might need to migrate to the video tracks onended
            // Firefox does not support .onended but it does not support
            // screensharing either
            stream.onended = function () {
                var idx = self.localScreens.indexOf(stream);
                if (idx > -1) {
                    self.localScreens.splice(idx, 1);
                }
                self.emit('localScreenStopped', stream);
            };
            self.emit('localScreen', stream);
        }

        // enable the callback
        if (cb) {
            return cb(err, stream);
        }
    });
};

LocalMedia.prototype.stopScreenShare = function (stream) {
    var self = this;
    if (stream) {
        stream.getTracks().forEach(function (track) { track.stop(); });
        this.emit('localScreenStopped', stream);
    } else {
        this.localScreens.forEach(function (stream) {
            stream.getTracks().forEach(function (track) { track.stop(); });
            self.emit('localScreenStopped', stream);
        });
        this.localScreens = [];
    }
};

// Audio controls
LocalMedia.prototype.mute = function () {
    this._audioEnabled(false);
    this.hardMuted = true;
    this.emit('audioOff');
};

LocalMedia.prototype.unmute = function () {
    this._audioEnabled(true);
    this.hardMuted = false;
    this.emit('audioOn');
};

LocalMedia.prototype.setupAudioMonitor = function (stream, harkOptions) {
    this._log('Setup audio');
    var audio = this.audioMonitor = hark(stream, harkOptions);
    var self = this;
    var timeout;

    audio.on('speaking', function () {
        self.emit('speaking');
        if (self.hardMuted) {
            return;
        }
        self.setMicIfEnabled(1);
    });

    audio.on('stopped_speaking', function () {
        if (timeout) {
            clearTimeout(timeout);
        }

        timeout = setTimeout(function () {
            self.emit('stoppedSpeaking');
            if (self.hardMuted) {
                return;
            }
            self.setMicIfEnabled(0.5);
        }, 1000);
    });
    audio.on('volume_change', function (volume, treshold) {
        self.emit('volumeChange', volume, treshold);
    });
};

// We do this as a seperate method in order to
// still leave the "setMicVolume" as a working
// method.
LocalMedia.prototype.setMicIfEnabled = function (volume) {
    if (!this.config.autoAdjustMic) {
        return;
    }
    this.gainController.setGain(volume);
};

// Video controls
LocalMedia.prototype.pauseVideo = function () {
    this._videoEnabled(false);
    this.emit('videoOff');
};
LocalMedia.prototype.resumeVideo = function () {
    this._videoEnabled(true);
    this.emit('videoOn');
};

// Combined controls
LocalMedia.prototype.pause = function () {
    this.mute();
    this.pauseVideo();
};
LocalMedia.prototype.resume = function () {
    this.unmute();
    this.resumeVideo();
};

// Internal methods for enabling/disabling audio/video
LocalMedia.prototype._audioEnabled = function (bool) {
    // work around for chrome 27 bug where disabling tracks
    // doesn't seem to work (works in canary, remove when working)
    this.setMicIfEnabled(bool ? 1 : 0);
    this.localStreams.forEach(function (stream) {
        stream.getAudioTracks().forEach(function (track) {
            track.enabled = !!bool;
        });
    });
};
LocalMedia.prototype._videoEnabled = function (bool) {
    this.localStreams.forEach(function (stream) {
        stream.getVideoTracks().forEach(function (track) {
            track.enabled = !!bool;
        });
    });
};

// check if all audio streams are enabled
LocalMedia.prototype.isAudioEnabled = function () {
    var enabled = true;
    this.localStreams.forEach(function (stream) {
        stream.getAudioTracks().forEach(function (track) {
            enabled = enabled && track.enabled;
        });
    });
    return enabled;
};

// check if all video streams are enabled
LocalMedia.prototype.isVideoEnabled = function () {
    var enabled = true;
    this.localStreams.forEach(function (stream) {
        stream.getVideoTracks().forEach(function (track) {
            enabled = enabled && track.enabled;
        });
    });
    return enabled;
};

// Backwards Compat
LocalMedia.prototype.startLocalMedia = LocalMedia.prototype.start;
LocalMedia.prototype.stopLocalMedia = LocalMedia.prototype.stop;

// fallback for old .localStream behaviour
Object.defineProperty(LocalMedia.prototype, 'localStream', {
    get: function () {
        return this.localStreams.length > 0 ? this.localStreams[0] : null;
    }
});
// fallback for old .localScreen behaviour
Object.defineProperty(LocalMedia.prototype, 'localScreen', {
    get: function () {
        return this.localScreens.length > 0 ? this.localScreens[0] : null;
    }
});

module.exports = LocalMedia;

},{"getscreenmedia":6,"getusermedia":5,"hark":3,"mediastream-gain":8,"mockconsole":9,"util":2,"webrtcsupport":4,"wildemitter":7}],2:[function(require,module,exports){
var events = require('events');

exports.isArray = isArray;
exports.isDate = function(obj){return Object.prototype.toString.call(obj) === '[object Date]'};
exports.isRegExp = function(obj){return Object.prototype.toString.call(obj) === '[object RegExp]'};


exports.print = function () {};
exports.puts = function () {};
exports.debug = function() {};

exports.inspect = function(obj, showHidden, depth, colors) {
  var seen = [];

  var stylize = function(str, styleType) {
    // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
    var styles =
        { '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] };

    var style =
        { 'special': 'cyan',
          'number': 'blue',
          'boolean': 'yellow',
          'undefined': 'grey',
          'null': 'bold',
          'string': 'green',
          'date': 'magenta',
          // "name": intentionally not styling
          'regexp': 'red' }[styleType];

    if (style) {
      return '\u001b[' + styles[style][0] + 'm' + str +
             '\u001b[' + styles[style][1] + 'm';
    } else {
      return str;
    }
  };
  if (! colors) {
    stylize = function(str, styleType) { return str; };
  }

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

    // Primitive types cannot have properties
    switch (typeof value) {
      case 'undefined':
        return stylize('undefined', 'undefined');

      case 'string':
        var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                                 .replace(/'/g, "\\'")
                                                 .replace(/\\"/g, '"') + '\'';
        return stylize(simple, 'string');

      case 'number':
        return stylize('' + value, 'number');

      case 'boolean':
        return stylize('' + value, 'boolean');
    }
    // For some reason typeof null is "object", so special case here.
    if (value === null) {
      return stylize('null', 'null');
    }

    // Look up the keys of the object.
    var visible_keys = Object_keys(value);
    var keys = showHidden ? Object_getOwnPropertyNames(value) : visible_keys;

    // Functions without properties can be shortcutted.
    if (typeof value === 'function' && keys.length === 0) {
      if (isRegExp(value)) {
        return stylize('' + value, 'regexp');
      } else {
        var name = value.name ? ': ' + value.name : '';
        return stylize('[Function' + name + ']', 'special');
      }
    }

    // Dates without properties can be shortcutted
    if (isDate(value) && keys.length === 0) {
      return stylize(value.toUTCString(), 'date');
    }

    var base, type, braces;
    // Determine the object type
    if (isArray(value)) {
      type = 'Array';
      braces = ['[', ']'];
    } else {
      type = 'Object';
      braces = ['{', '}'];
    }

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

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

    if (keys.length === 0) {
      return braces[0] + base + braces[1];
    }

    if (recurseTimes < 0) {
      if (isRegExp(value)) {
        return stylize('' + value, 'regexp');
      } else {
        return stylize('[Object]', 'special');
      }
    }

    seen.push(value);

    var output = keys.map(function(key) {
      var name, str;
      if (value.__lookupGetter__) {
        if (value.__lookupGetter__(key)) {
          if (value.__lookupSetter__(key)) {
            str = stylize('[Getter/Setter]', 'special');
          } else {
            str = stylize('[Getter]', 'special');
          }
        } else {
          if (value.__lookupSetter__(key)) {
            str = stylize('[Setter]', 'special');
          }
        }
      }
      if (visible_keys.indexOf(key) < 0) {
        name = '[' + key + ']';
      }
      if (!str) {
        if (seen.indexOf(value[key]) < 0) {
          if (recurseTimes === null) {
            str = format(value[key]);
          } else {
            str = format(value[key], recurseTimes - 1);
          }
          if (str.indexOf('\n') > -1) {
            if (isArray(value)) {
              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 = stylize('[Circular]', 'special');
        }
      }
      if (typeof name === 'undefined') {
        if (type === '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 = stylize(name, 'name');
        } else {
          name = name.replace(/'/g, "\\'")
                     .replace(/\\"/g, '"')
                     .replace(/(^"|"$)/g, "'");
          name = stylize(name, 'string');
        }
      }

      return name + ': ' + str;
    });

    seen.pop();

    var numLinesEst = 0;
    var length = output.reduce(function(prev, cur) {
      numLinesEst++;
      if (cur.indexOf('\n') >= 0) numLinesEst++;
      return prev + cur.length + 1;
    }, 0);

    if (length > 50) {
      output = braces[0] +
               (base === '' ? '' : base + '\n ') +
               ' ' +
               output.join(',\n  ') +
               ' ' +
               braces[1];

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

    return output;
  }
  return format(obj, (typeof depth === 'undefined' ? 2 : depth));
};


function isArray(ar) {
  return Array.isArray(ar) ||
         (typeof ar === 'object' && Object.prototype.toString.call(ar) === '[object Array]');
}


function isRegExp(re) {
  typeof re === 'object' && Object.prototype.toString.call(re) === '[object RegExp]';
}


function isDate(d) {
  return typeof d === 'object' && Object.prototype.toString.call(d) === '[object Date]';
}

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(' ');
}

exports.log = function (msg) {};

exports.pump = null;

var Object_keys = Object.keys || function (obj) {
    var res = [];
    for (var key in obj) res.push(key);
    return res;
};

var Object_getOwnPropertyNames = Object.getOwnPropertyNames || function (obj) {
    var res = [];
    for (var key in obj) {
        if (Object.hasOwnProperty.call(obj, key)) res.push(key);
    }
    return res;
};

var Object_create = Object.create || function (prototype, properties) {
    // from es5-shim
    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.inherits = function(ctor, superCtor) {
  ctor.super_ = superCtor;
  ctor.prototype = Object_create(superCtor.prototype, {
    constructor: {
      value: ctor,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });
};

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (typeof f !== 'string') {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(exports.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': return JSON.stringify(args[i++]);
      default:
        return x;
    }
  });
  for(var x = args[i]; i < len; x = args[++i]){
    if (x === null || typeof x !== 'object') {
      str += ' ' + x;
    } else {
      str += ' ' + exports.inspect(x);
    }
  }
  return str;
};

},{"events":10}],4:[function(require,module,exports){
// created by @HenrikJoreteg
var prefix;
var version;

if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
    prefix = 'moz';
    version = parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
    prefix = 'webkit';
    version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
}

var PC = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
var MediaStream = window.webkitMediaStream || window.MediaStream;
var screenSharing = window.location.protocol === 'https:' &&
    ((prefix === 'webkit' && version >= 26) ||
     (prefix === 'moz' && version >= 33))
var AudioContext = window.AudioContext || window.webkitAudioContext;
var videoEl = document.createElement('video');
var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;

// export support flags and constructors.prototype && PC
module.exports = {
    prefix: prefix,
    browserVersion: version,
    support: !!PC && !!getUserMedia,
    // new support style
    supportRTCPeerConnection: !!PC,
    supportVp8: supportVp8,
    supportGetUserMedia: !!getUserMedia,
    supportDataChannel: !!(PC && PC.prototype && PC.prototype.createDataChannel),
    supportWebAudio: !!(AudioContext && AudioContext.prototype.createMediaStreamSource),
    supportMediaStream: !!(MediaStream && MediaStream.prototype.removeTrack),
    supportScreenSharing: !!screenSharing,
    // constructors
    AudioContext: AudioContext,
    PeerConnection: PC,
    SessionDescription: SessionDescription,
    IceCandidate: IceCandidate,
    MediaStream: MediaStream,
    getUserMedia: getUserMedia
};

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

Why? I wanted it standalone.

I also wanted support for wildcard emitters like this:

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

});

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

});

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

module.exports = WildEmitter;

function WildEmitter() { }

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

    prototype.isWildEmitter= true;

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

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

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

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

        if (!callbacks) return this;

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

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

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

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

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

        return this;
    };

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

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

};

WildEmitter.mixin(WildEmitter);

},{}],9:[function(require,module,exports){
var methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",");
var l = methods.length;
var fn = function () {};
var mockconsole = {};

while (l--) {
    mockconsole[methods[l]] = fn;
}

module.exports = mockconsole;

},{}],11:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};

process.nextTick = (function () {
    var canSetImmediate = typeof window !== 'undefined'
    && window.setImmediate;
    var canPost = typeof window !== 'undefined'
    && window.postMessage && window.addEventListener
    ;

    if (canSetImmediate) {
        return function (f) { return window.setImmediate(f) };
    }

    if (canPost) {
        var queue = [];
        window.addEventListener('message', function (ev) {
            var source = ev.source;
            if ((source === window || source === null) && ev.data === 'process-tick') {
                ev.stopPropagation();
                if (queue.length > 0) {
                    var fn = queue.shift();
                    fn();
                }
            }
        }, true);

        return function nextTick(fn) {
            queue.push(fn);
            window.postMessage('process-tick', '*');
        };
    }

    return function nextTick(fn) {
        setTimeout(fn, 0);
    };
})();

process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];

process.binding = function (name) {
    throw new Error('process.binding is not supported');
}

// TODO(shtylman)
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};

},{}],10:[function(require,module,exports){
var process=require("__browserify_process");if (!process.EventEmitter) process.EventEmitter = function () {};

var EventEmitter = exports.EventEmitter = process.EventEmitter;
var isArray = typeof Array.isArray === 'function'
    ? Array.isArray
    : function (xs) {
        return Object.prototype.toString.call(xs) === '[object Array]'
    }
;
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;
}

// By default EventEmitters will print a warning if more than
// 10 listeners are added to it. This is a useful default which
// helps finding memory leaks.
//
// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
var defaultMaxListeners = 10;
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!this._events) this._events = {};
  this._events.maxListeners = n;
};


EventEmitter.prototype.emit = function(type) {
  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events || !this._events.error ||
        (isArray(this._events.error) && !this._events.error.length))
    {
      if (arguments[1] instanceof Error) {
        throw arguments[1]; // Unhandled 'error' event
      } else {
        throw new Error("Uncaught, unspecified 'error' event.");
      }
      return false;
    }
  }

  if (!this._events) return false;
  var handler = this._events[type];
  if (!handler) return false;

  if (typeof handler == 'function') {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        var args = Array.prototype.slice.call(arguments, 1);
        handler.apply(this, args);
    }
    return true;

  } else if (isArray(handler)) {
    var args = Array.prototype.slice.call(arguments, 1);

    var listeners = handler.slice();
    for (var i = 0, l = listeners.length; i < l; i++) {
      listeners[i].apply(this, args);
    }
    return true;

  } else {
    return false;
  }
};

// EventEmitter is defined in src/node_events.cc
// EventEmitter.prototype.emit() is also defined there.
EventEmitter.prototype.addListener = function(type, listener) {
  if ('function' !== typeof listener) {
    throw new Error('addListener only takes instances of Function');
  }

  if (!this._events) this._events = {};

  // To avoid recursion in the case that type == "newListeners"! Before
  // adding it to the listeners, first emit "newListeners".
  this.emit('newListener', type, listener);

  if (!this._events[type]) {
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
  } else if (isArray(this._events[type])) {

    // Check for listener leak
    if (!this._events[type].warned) {
      var m;
      if (this._events.maxListeners !== undefined) {
        m = this._events.maxListeners;
      } else {
        m = defaultMaxListeners;
      }

      if (m && m > 0 && this._events[type].length > m) {
        this._events[type].warned = true;
        console.error('(node) warning: possible EventEmitter memory ' +
                      'leak detected. %d listeners added. ' +
                      'Use emitter.setMaxListeners() to increase limit.',
                      this._events[type].length);
        console.trace();
      }
    }

    // If we've already got an array, just append.
    this._events[type].push(listener);
  } else {
    // Adding the second element, need to change to array.
    this._events[type] = [this._events[type], listener];
  }

  return this;
};

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

EventEmitter.prototype.once = function(type, listener) {
  var self = this;
  self.on(type, function g() {
    self.removeListener(type, g);
    listener.apply(this, arguments);
  });

  return this;
};

EventEmitter.prototype.removeListener = function(type, listener) {
  if ('function' !== typeof listener) {
    throw new Error('removeListener only takes instances of Function');
  }

  // does not use listeners(), so no side effect of creating _events[type]
  if (!this._events || !this._events[type]) return this;

  var list = this._events[type];

  if (isArray(list)) {
    var i = indexOf(list, listener);
    if (i < 0) return this;
    list.splice(i, 1);
    if (list.length == 0)
      delete this._events[type];
  } else if (this._events[type] === listener) {
    delete this._events[type];
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  if (arguments.length === 0) {
    this._events = {};
    return this;
  }

  // does not use listeners(), so no side effect of creating _events[type]
  if (type && this._events && this._events[type]) this._events[type] = null;
  return this;
};

EventEmitter.prototype.listeners = function(type) {
  if (!this._events) this._events = {};
  if (!this._events[type]) this._events[type] = [];
  if (!isArray(this._events[type])) {
    this._events[type] = [this._events[type]];
  }
  return this._events[type];
};

EventEmitter.listenerCount = function(emitter, type) {
  var ret;
  if (!emitter._events || !emitter._events[type])
    ret = 0;
  else if (typeof emitter._events[type] === 'function')
    ret = 1;
  else
    ret = emitter._events[type].length;
  return ret;
};

},{"__browserify_process":11}],5:[function(require,module,exports){
// getUserMedia helper by @HenrikJoreteg used for navigator.getUserMedia shim
var adapter = require('webrtc-adapter');

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

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

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

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

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

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

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

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

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

        cb(error);
    });
};

},{"webrtc-adapter":12}],8:[function(require,module,exports){
var support = require('webrtcsupport');


function GainController(stream) {
    this.support = support.webAudio && support.mediaStream;

    // set our starting value
    this.gain = 1;

    if (this.support) {
        var context = this.context = new support.AudioContext();
        this.microphone = context.createMediaStreamSource(stream);
        this.gainFilter = context.createGain();
        this.destination = context.createMediaStreamDestination();
        this.outputStream = this.destination.stream;
        this.microphone.connect(this.gainFilter);
        this.gainFilter.connect(this.destination);
        stream.addTrack(this.outputStream.getAudioTracks()[0]);
        stream.removeTrack(stream.getAudioTracks()[0]);
    }
    this.stream = stream;
}

// setting
GainController.prototype.setGain = function (val) {
    // check for support
    if (!this.support) return;
    this.gainFilter.gain.value = val;
    this.gain = val;
};

GainController.prototype.getGain = function () {
    return this.gain;
};

GainController.prototype.off = function () {
    return this.setGain(0);
};

GainController.prototype.on = function () {
    this.setGain(1);
};


module.exports = GainController;

},{"webrtcsupport":13}],13:[function(require,module,exports){
// created by @HenrikJoreteg
var prefix;
var version;

if (window.mozRTCPeerConnection || navigator.mozGetUserMedia) {
    prefix = 'moz';
    version = parseInt(navigator.userAgent.match(/Firefox\/([0-9]+)\./)[1], 10);
} else if (window.webkitRTCPeerConnection || navigator.webkitGetUserMedia) {
    prefix = 'webkit';
    version = navigator.userAgent.match(/Chrom(e|ium)/) && parseInt(navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./)[2], 10);
}

var PC = window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
var IceCandidate = window.mozRTCIceCandidate || window.RTCIceCandidate;
var SessionDescription = window.mozRTCSessionDescription || window.RTCSessionDescription;
var MediaStream = window.webkitMediaStream || window.MediaStream;
var screenSharing = window.location.protocol === 'https:' &&
    ((prefix === 'webkit' && version >= 26) ||
     (prefix === 'moz' && version >= 33))
var AudioContext = window.AudioContext || window.webkitAudioContext;
var videoEl = document.createElement('video');
var supportVp8 = videoEl && videoEl.canPlayType && videoEl.canPlayType('video/webm; codecs="vp8", vorbis') === "probably";
var getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.msGetUserMedia || navigator.mozGetUserMedia;

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

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

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

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

  return maxVolume;
}


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


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

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

  //Setup Audio Context
  if (!audioContext) {
    audioContext = new audioContextType();
  }
  var sourceNode, fftBins, analyser;

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

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

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

  harker.speaking = false;

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

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

  // Poll the analyser node to determine if speaking
  // and emit events if changed
  var looper = function() {
    setTimeout(function() {
    
      //check if stop has been called
      if(!running) {
        return;
      }
      
      var currentVolume = getMaxVolume(analyser, fftBins);

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

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

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


  return harker;
}

},{"wildemitter":7}],6:[function(require,module,exports){
// getScreenMedia helper by @HenrikJoreteg
var getUserMedia = require('getusermedia');

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

module.exports = function (constraints, cb) {
    var hasConstraints = arguments.length === 2;
    var callback = hasConstraints ? cb : constraints;
    var error;

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

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

        // check that the extension is installed by looking for a
        // sessionStorage variable that contains the extension id
        // this has to be set after installation unless the contest
        // script does that
        if (sessionStorage.getScreenMediaJSExtensionId) {
            chrome.runtime.sendMessage(sessionStorage.getScreenMediaJSExtensionId,
                {type:'getScreen', id: 1}, null,
                function (data) {
                    if (!data || data.sourceId === '') { // user canceled
                        var error = new Error('NavigatorUserMediaError');
                        error.name = 'PERMISSION_DENIED';
                        callback(error);
                    } else {
                        constraints = (hasConstraints && constraints) || {audio: false, video: {
                            mandatory: {
                                chromeMediaSource: 'desktop',
                                maxWidth: window.screen.width,
                                maxHeight: window.screen.height,
                                maxFrameRate: 3
                            }
                        }};
                        constraints.video.mandatory.chromeMediaSourceId = data.sourceId;
                        getUserMedia(constraints, callback);
                    }
                }
            );
        } else if (window.cefGetScreenMedia) {
            //window.cefGetScreenMedia is experimental - may be removed without notice
            window.cefGetScreenMedia(function(sourceId) {
                if (!sourceId) {
                    var error = new Error('cefGetScreenMediaError');
                    error.name = 'CEF_GETSCREENMEDIA_CANCELED';
                    callback(error);
                } else {
                    constraints = (hasConstraints && constraints) || {audio: false, video: {
                        mandatory: {
                            chromeMediaSource: 'desktop',
                            maxWidth: window.screen.width,
                            maxHeight: window.screen.height,
                            maxFrameRate: 3
                        },
                        optional: [
                            {googLeakyBucket: true},
                            {googTemporalLayeredScreencast: true}
                        ]
                    }};
                    constraints.video.mandatory.chromeMediaSourceId = sourceId;
                    getUserMedia(constraints, callback);
                }
            });
        } else if (isCef || (chromever >= 26 && chromever <= maxver)) {
            // chrome 26 - chrome 33 way to do it -- requires bad chrome://flags
            // note: this is basically in maintenance mode and will go away soon
            constraints = (hasConstraints && constraints) || {
                video: {
                    mandatory: {
                        googLeakyBucket: true,
                        maxWidth: window.screen.width,
                        maxHeight: window.screen.height,
                        maxFrameRate: 3,
                        chromeMediaSource: 'screen'
                    }
                }
            };
            getUserMedia(constraints, callback);
        } else {
            // chrome 34+ way requiring an extension
            var pending = window.setTimeout(function () {
                error = new Error('NavigatorUserMediaError');
                error.name = 'EXTENSION_UNAVAILABLE';
                return callback(error);
            }, 1000);
            cache[pending] = [callback, hasConstraints ? constraints : null];
            window.postMessage({ type: 'getScreen', id: pending }, '*');
        }
    } else if (window.navigator.userAgent.match('Firefox')) {
        var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
        if (ffver >= 33) {
            constraints = (hasConstraints && constraints) || {
                video: {
                    mozMediaSource: 'window',
                    mediaSource: 'window'
                }
            }
            getUserMedia(constraints, function (err, stream) {
                callback(err, stream);
                // workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
                if (!err) {
                    var lastTime = stream.currentTime;
                    var polly = window.setInterval(function () {
                        if (!stream) window.clearInterval(polly);
                        if (stream.currentTime == lastTime) {
                            window.clearInterval(polly);
                            if (stream.onended) {
                                stream.onended();
                            }
                        }
                        lastTime = stream.currentTime;
                    }, 500);
                }
            });
        } else {
            error = new Error('NavigatorUserMediaError');
            error.name = 'EXTENSION_UNAVAILABLE'; // does not make much sense but...
        }
    }
};

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

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

},{"getusermedia":5}],12:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */

'use strict';

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

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

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

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

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

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

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

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

},{"./chrome/chrome_shim":15,"./edge/edge_shim":16,"./firefox/firefox_shim":17,"./safari/safari_shim":18,"./utils":14}],14:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

var logDisabled_ = false;

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

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

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

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

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

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

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

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

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

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

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

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

    return result;
  }
};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

          return standardReport;
        };

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

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

        // promise-support
        return new Promise(function(resolve, reject) {
          if (args.length === 1 && typeof selector === 'object') {
            origGetStats.apply(self,
                [function(response) {
                  resolve.apply(null, [fixChromeStats_(response)]);
                }, reject]);
          } else {
            origGetStats.apply(self, [resolve, reject]);
          }
        });
      };

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

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

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

    ['setLocalDescription', 'setRemoteDescription', 'addIceCandidate']
        .forEach(function(method) {
          var nativeMethod = webkitRTCPeerConnection.prototype[method];
          webkitRTCPeerConnection.prototype[method] = function() {
            var args = arguments;
            var self = this;
            args[0] = new ((method === 'addIceCandidate')?
                RTCIceCandidate : RTCSessionDescription)(args[0]);
            return new Promise(function(resolve, reject) {
              nativeMethod.apply(self, [args[0],
                  function() {
                    resolve();
                    if (args.length >= 2) {
                      args[1].apply(null, []);
                    }
                  },
                  function(err) {
                    reject(err);
                    if (args.length >= 3) {
                      args[2].apply(null, [err]);
                    }
                  }]
                );
            });
          };
        });
  },

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

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


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

},{"../utils.js":14,"./getusermedia":19}],17:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

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

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

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

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

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

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

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

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

    navigator.getUserMedia = getUserMedia_;

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

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

    if (browserDetails.version < 41) {
      // Work around http://bugzil.la/1169665
      var orgEnumerateDevices =
          navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
      navigator.mediaDevices.enumerateDevices = function() {
        return orgEnumerateDevices().then(undefined, function(e) {
          if (e.name === 'NotFoundError') {
            return [];
          }
          throw e;
        });
      };
    }
  },

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

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

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

},{"../utils":14,"./getusermedia":20}],16:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

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

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

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

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

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

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

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

      this.iceOptions = {
        gatherPolicy: 'all',
        iceServers: []
      };
      if (config && config.iceTransportPolicy) {
        switch (config.iceTransportPolicy) {
          case 'all':
          case 'relay':
            this.iceOptions.gatherPolicy = config.iceTransportPolicy;
            break;
          case 'none':
            // FIXME: remove once implementation and spec have added this.
            throw new TypeError('iceTransportPolicy "none" not supported');
          default:
            // don't set iceTransportPolicy.
            break;
        }
      }
      if (config && config.iceServers) {
        // Edge does not like
        // 1) stun:
        // 2) turn: that does not have all of turn:host:port?transport=udp
        this.iceOptions.iceServers = config.iceServers.filter(function(server) {
          if (server && server.urls) {
            server.urls = server.urls.filter(function(url) {
              return url.indexOf('turn:') === 0 &&
                  url.indexOf('transport=udp') !== -1;
            })[0];
            return !!server.urls;
          }
          return false;
        });
      }

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

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

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

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

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

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

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

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

          // FIXME: fecMechanisms
          return commonCapabilities;
        };

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

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

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

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

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

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

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

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

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

              if (!rejected) {
                var remoteIceParameters = SDPUtils.getIceParameters(
                    mediaSection, sessionpart);
                iceTransport.start(iceGatherer, remoteIceParameters,
                    'controlled');

                var remoteDtlsParameters = SDPUtils.getDtlsParameters(
                    mediaSection, sessionpart);
                dtlsTransport.start(remoteDtlsParameters);

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

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

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

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

    window.RTCPeerConnection.prototype.setRemoteDescription =
        function(description) {
          var self = this;
          var stream = new MediaStream();
          var receiverList = [];
          var sections = SDPUtils.splitSections(description.sdp);
          var sessionpart = sections.shift();
          sections.forEach(function(mediaSection, sdpMLineIndex) {
            var lines = SDPUtils.splitLines(mediaSection);
            var mline = lines[0].substr(2).split(' ');
            var kind = mline[0];
            var rejected = mline[1] === '0';
            var direction = SDPUtils.getDirection(mediaSection, sessionpart);

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

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

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

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

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

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

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

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

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

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

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

              if (isComplete) {
                iceTransport.setRemoteCandidates(cands);
              }
              iceTransport.start(iceGatherer, remoteIceParameters,
                  'controlling');
              dtlsTransport.start(remoteDtlsParameters);

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

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

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

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

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

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

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

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

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

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

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

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

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

        var transports = self._createIceAndDtlsTransports(mid, sdpMLineIndex);

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

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

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

        transceivers[sdpMLineIndex] = {
          iceGatherer: transports.iceGatherer,
          iceTransport: transports.iceTransport,
          dtlsTransport: transports.dtlsTransport,
          localCapabilities: localCapabilities,
          remoteCapabilities: null,
          rtpSender: rtpSender,
          rtpReceiver: rtpReceiver,
          kind: kind,
          mid: mid,
          sendEncodingParameters: sendEncodingParameters,
          recvEncodingParameters: null
        };
        var transceiver = transceivers[sdpMLineIndex];
        sdp += SDPUtils.writeMediaSection(transceiver,
            transceiver.localCapabilities, 'offer', self.localStreams[0]);
      });

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

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

      var sdp = SDPUtils.writeSessionBoilerplate();
      this.transceivers.forEach(function(transceiver) {
        // Calculate intersection of capabilities.
        var commonCapabilities = self._getCommonCapabilities(
            transceiver.localCapabilities,
            transceiver.remoteCapabilities);

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

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

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

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

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

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

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

// Expose public methods.
module.exports = {
  shimPeerConnection: edgeShim.shimPeerConnection,
  attachMediaStream: edgeShim.attachMediaStream,
  reattachMediaStream: edgeShim.reattachMediaStream
};

},{"../utils":14,"./edge_sdp":21}],21:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

// SDP helpers.
var SDPUtils = {};

// Generate an alphanumeric identifier for cname or mids.
// TODO: use UUIDs instead? https://gist.github.com/jed/982883
SDPUtils.generateIdentifier = function() {
  return Math.random().toString(36).substr(2, 10);
};

// The RTCP CNAME used by all peerconnections from the same JS.
SDPUtils.localCName = SDPUtils.generateIdentifier();

// Splits SDP into lines, dealing with both CRLF and LF.
SDPUtils.splitLines = function(blob) {
  return blob.trim().split('\n').map(function(line) {
    return line.trim();
  });
};
// Splits SDP into sessionpart and mediasections. Ensures CRLF.
SDPUtils.splitSections = function(blob) {
  var parts = blob.split('\nm=');
  return parts.map(function(part, index) {
    return (index > 0 ? 'm=' + part : part).trim() + '\r\n';
  });
};

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

// Parses an ICE candidate line. Sample input:
// candidate:702786350 2 udp 41819902 8.8.8.8 60769 typ relay raddr 8.8.8.8
// rport 55996"
SDPUtils.parseCandidate = function(line) {
  var parts;
  // Parse both variants.
  if (line.indexOf('a=candidate:') === 0) {
    parts = line.substring(12).split(' ');
  } else {
    parts = line.substring(10).split(' ');
  }

  var candidate = {
    foundation: parts[0],
    component: parts[1],
    protocol: parts[2].toLowerCase(),
    priority: parseInt(parts[3], 10),
    ip: parts[4],
    port: parseInt(parts[5], 10),
    // skip parts[6] == 'typ'
    type: parts[7]
  };

  for (var i = 8; i < parts.length; i += 2) {
    switch (parts[i]) {
      case 'raddr':
        candidate.relatedAddress = parts[i + 1];
        break;
      case 'rport':
        candidate.relatedPort = parseInt(parts[i + 1], 10);
        break;
      case 'tcptype':
        candidate.tcpType = parts[i + 1];
        break;
      default: // Unknown extensions are silently ignored.
        break;
    }
  }
  return candidate;
};

// Translates a candidate object into SDP candidate attribute.
SDPUtils.writeCandidate = function(candidate) {
  var sdp = [];
  sdp.push(candidate.foundation);
  sdp.push(candidate.component);
  sdp.push(candidate.protocol.toUpperCase());
  sdp.push(candidate.priority);
  sdp.push(candidate.ip);
  sdp.push(candidate.port);

  var type = candidate.type;
  sdp.push('typ');
  sdp.push(type);
  if (type !== 'host' && candidate.relatedAddress &&
      candidate.relatedPort) {
    sdp.push('raddr');
    sdp.push(candidate.relatedAddress); // was: relAddr
    sdp.push('rport');
    sdp.push(candidate.relatedPort); // was: relPort
  }
  if (candidate.tcpType && candidate.protocol.toLowerCase() === 'tcp') {
    sdp.push('tcptype');
    sdp.push(candidate.tcpType);
  }
  return 'candidate:' + sdp.join(' ');
};

// Parses an rtpmap line, returns RTCRtpCoddecParameters. Sample input:
// a=rtpmap:111 opus/48000/2
SDPUtils.parseRtpMap = function(line) {
  var parts = line.substr(9).split(' ');
  var parsed = {
    payloadType: parseInt(parts.shift(), 10) // was: id
  };

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

  parsed.name = parts[0];
  parsed.clockRate = parseInt(parts[1], 10); // was: clockrate
  // was: channels
  parsed.numChannels = parts.length === 3 ? parseInt(parts[2], 10) : 1;
  return parsed;
};

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

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

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

// Parses an ftmp line, returns dictionary. Sample input:
// a=fmtp:96 vbr=on;cng=on
// Also deals with vbr=on; cng=on
SDPUtils.parseFmtp = function(line) {
  var parsed = {};
  var kv;
  var parts = line.substr(line.indexOf(' ') + 1).split(';');
  for (var j = 0; j < parts.length; j++) {
    kv = parts[j].trim().split('=');
    parsed[kv[0].trim()] = kv[1];
  }
  return parsed;
};

// Generates an a=ftmp line from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeFmtp = function(codec) {
  var line = '';
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  if (codec.parameters && Object.keys(codec.parameters).length) {
    var params = [];
    Object.keys(codec.parameters).forEach(function(param) {
      params.push(param + '=' + codec.parameters[param]);
    });
    line += 'a=fmtp:' + pt + ' ' + params.join(';') + '\r\n';
  }
  return line;
};

// Parses an rtcp-fb line, returns RTCPRtcpFeedback object. Sample input:
// a=rtcp-fb:98 nack rpsi
SDPUtils.parseRtcpFb = function(line) {
  var parts = line.substr(line.indexOf(' ') + 1).split(' ');
  return {
    type: parts.shift(),
    parameter: parts.join(' ')
  };
};
// Generate a=rtcp-fb lines from RTCRtpCodecCapability or RTCRtpCodecParameters.
SDPUtils.writeRtcpFb = function(codec) {
  var lines = '';
  var pt = codec.payloadType;
  if (codec.preferredPayloadType !== undefined) {
    pt = codec.preferredPayloadType;
  }
  if (codec.rtcpFeedback && codec.rtcpFeedback.length) {
    // FIXME: special handling for trr-int?
    codec.rtcpFeedback.forEach(function(fb) {
      lines += 'a=rtcp-fb:' + pt + ' ' + fb.type + ' ' + fb.parameter +
          '\r\n';
    });
  }
  return lines;
};

// Parses an RFC 5576 ssrc media attribute. Sample input:
// a=ssrc:3735928559 cname:something
SDPUtils.parseSsrcMedia = function(line) {
  var sp = line.indexOf(' ');
  var parts = {
    ssrc: parseInt(line.substr(7, sp - 7), 10)
  };
  var colon = line.indexOf(':', sp);
  if (colon > -1) {
    parts.attribute = line.substr(sp + 1, colon - sp - 1);
    parts.value = line.substr(colon + 1);
  } else {
    parts.attribute = line.substr(sp + 1);
  }
  return parts;
};

// Extracts DTLS parameters from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the fingerprint line as input. See also getIceParameters.
SDPUtils.getDtlsParameters = function(mediaSection, sessionpart) {
  var lines = SDPUtils.splitLines(mediaSection);
  // Search in session part, too.
  lines = lines.concat(SDPUtils.splitLines(sessionpart));
  var fpLine = lines.filter(function(line) {
    return line.indexOf('a=fingerprint:') === 0;
  })[0].substr(14);
  // Note: a=setup line is ignored since we use the 'auto' role.
  var dtlsParameters = {
    role: 'auto',
    fingerprints: [{
      algorithm: fpLine.split(' ')[0],
      value: fpLine.split(' ')[1]
    }]
  };
  return dtlsParameters;
};

// Serializes DTLS parameters to SDP.
SDPUtils.writeDtlsParameters = function(params, setupType) {
  var sdp = 'a=setup:' + setupType + '\r\n';
  params.fingerprints.forEach(function(fp) {
    sdp += 'a=fingerprint:' + fp.algorithm + ' ' + fp.value + '\r\n';
  });
  return sdp;
};
// Parses ICE information from SDP media section or sessionpart.
// FIXME: for consistency with other functions this should only
//   get the ice-ufrag and ice-pwd lines as input.
SDPUtils.getIceParameters = function(mediaSection, sessionpart) {
  var lines = SDPUtils.splitLines(mediaSection);
  // Search in session part, too.
  lines = lines.concat(SDPUtils.splitLines(sessionpart));
  var iceParameters = {
    usernameFragment: lines.filter(function(line) {
      return line.indexOf('a=ice-ufrag:') === 0;
    })[0].substr(12),
    password: lines.filter(function(line) {
      return line.indexOf('a=ice-pwd:') === 0;
    })[0].substr(10)
  };
  return iceParameters;
};

// Serializes ICE parameters to SDP.
SDPUtils.writeIceParameters = function(params) {
  return 'a=ice-ufrag:' + params.usernameFragment + '\r\n' +
      'a=ice-pwd:' + params.password + '\r\n';
};

// Parses the SDP media section and returns RTCRtpParameters.
SDPUtils.parseRtpParameters = function(mediaSection) {
  var description = {
    codecs: [],
    headerExtensions: [],
    fecMechanisms: [],
    rtcp: []
  };
  var lines = SDPUtils.splitLines(mediaSection);
  var mline = lines[0].split(' ');
  for (var i = 3; i < mline.length; i++) { // find all codecs from mline[3..]
    var pt = mline[i];
    var rtpmapline = SDPUtils.matchPrefix(
        mediaSection, 'a=rtpmap:' + pt + ' ')[0];
    if (rtpmapline) {
      var codec = SDPUtils.parseRtpMap(rtpmapline);
      var fmtps = SDPUtils.matchPrefix(
          mediaSection, 'a=fmtp:' + pt + ' ');
      // Only the first a=fmtp:<pt> is considered.
      codec.parameters = fmtps.length ? SDPUtils.parseFmtp(fmtps[0]) : {};
      codec.rtcpFeedback = SDPUtils.matchPrefix(
          mediaSection, 'a=rtcp-fb:' + pt + ' ')
        .map(SDPUtils.parseRtcpFb);
      description.codecs.push(codec);
      // parse FEC mechanisms from rtpmap lines.
      switch (codec.name.toUpperCase()) {
        case 'RED':
        case 'ULPFEC':
          description.fecMechanisms.push(codec.name.toUpperCase());
          break;
        default: // only RED and ULPFEC are recognized as FEC mechanisms.
          break;
      }
    }
  }
  SDPUtils.matchPrefix(mediaSection, 'a=extmap:').forEach(function(line) {
    description.headerExtensions.push(SDPUtils.parseExtmap(line));
  });
  // FIXME: parse rtcp.
  return description;
};

// Generates parts of the SDP media section describing the capabilities /
// parameters.
SDPUtils.writeRtpDescription = function(kind, caps) {
  var sdp = '';

  // Build the mline.
  sdp += 'm=' + kind + ' ';
  sdp += caps.codecs.length > 0 ? '9' : '0'; // reject if no codecs.
  sdp += ' UDP/TLS/RTP/SAVPF ';
  sdp += caps.codecs.map(function(codec) {
    if (codec.preferredPayloadType !== undefined) {
      return codec.preferredPayloadType;
    }
    return codec.payloadType;
  }).join(' ') + '\r\n';

  sdp += 'c=IN IP4 0.0.0.0\r\n';
  sdp += 'a=rtcp:9 IN IP4 0.0.0.0\r\n';

  // Add a=rtpmap lines for each codec. Also fmtp and rtcp-fb.
  caps.codecs.forEach(function(codec) {
    sdp += SDPUtils.writeRtpMap(codec);
    sdp += SDPUtils.writeFmtp(codec);
    sdp += SDPUtils.writeRtcpFb(codec);
  });
  // FIXME: add headerExtensions, fecMechanismş and rtcp.
  sdp += 'a=rtcp-mux\r\n';
  return sdp;
};

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

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

  var flows = SDPUtils.matchPrefix(mediaSection, 'a=ssrc-group:FID')
  .map(function(line) {
    var parts = line.split(' ');
    parts.shift();
    return parts.map(function(part) {
      return parseInt(part, 10);
    });
  });
  if (flows.length > 0 && flows[0].length > 1 && flows[0][0] === primarySsrc) {
    secondarySsrc = flows[0][1];
  }

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

  // we support both b=AS and b=TIAS but interpret AS as TIAS.
  var bandwidth = SDPUtils.matchPrefix(mediaSection, 'b=');
  if (bandwidth.length) {
    if (bandwidth[0].indexOf('b=TIAS:') === 0) {
      bandwidth = parseInt(bandwidth[0].substr(7), 10);
    } else if (bandwidth[0].indexOf('b=AS:') === 0) {
      bandwidth = parseInt(bandwidth[0].substr(5), 10);
    }
    encodingParameters.forEach(function(params) {
      params.maxBitrate = bandwidth;
    });
  }
  return encodingParameters;
};

SDPUtils.writeSessionBoilerplate = function() {
  // FIXME: sess-id should be an NTP timestamp.
  return 'v=0\r\n' +
      'o=thisisadapterortc 8169639915646943137 2 IN IP4 127.0.0.1\r\n' +
      's=-\r\n' +
      't=0 0\r\n';
};

SDPUtils.writeMediaSection = function(transceiver, caps, type, stream) {
  var sdp = SDPUtils.writeRtpDescription(transceiver.kind, caps);

  // Map ICE parameters (ufrag, pwd) to SDP.
  sdp += SDPUtils.writeIceParameters(
      transceiver.iceGatherer.getLocalParameters());

  // Map DTLS parameters to SDP.
  sdp += SDPUtils.writeDtlsParameters(
      transceiver.dtlsTransport.getLocalParameters(),
      type === 'offer' ? 'actpass' : 'active');

  sdp += 'a=mid:' + transceiver.mid + '\r\n';

  if (transceiver.rtpSender && transceiver.rtpReceiver) {
    sdp += 'a=sendrecv\r\n';
  } else if (transceiver.rtpSender) {
    sdp += 'a=sendonly\r\n';
  } else if (transceiver.rtpReceiver) {
    sdp += 'a=recvonly\r\n';
  } else {
    sdp += 'a=inactive\r\n';
  }

  // FIXME: for RTX there might be multiple SSRCs. Not implemented in Edge yet.
  if (transceiver.rtpSender) {
    var msid = 'msid:' + stream.id + ' ' +
        transceiver.rtpSender.track.id + '\r\n';
    sdp += 'a=' + msid;
    sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
        ' ' + msid;
  }
  // FIXME: this should be written by writeRtpDescription.
  sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
      ' cname:' + SDPUtils.localCName + '\r\n';
  return sdp;
};

// Gets the direction from the mediaSection or the sessionpart.
SDPUtils.getDirection = function(mediaSection, sessionpart) {
  // Look for sendrecv, sendonly, recvonly, inactive, default to sendrecv.
  var lines = SDPUtils.splitLines(mediaSection);
  for (var i = 0; i < lines.length; i++) {
    switch (lines[i]) {
      case 'a=sendrecv':
      case 'a=sendonly':
      case 'a=recvonly':
      case 'a=inactive':
        return lines[i].substr(2);
      default:
        // FIXME: What should happen here?
    }
  }
  if (sessionpart) {
    return SDPUtils.getDirection(sessionpart);
  }
  return 'sendrecv';
};

// Expose public methods.
module.exports = SDPUtils;

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

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

  var getUserMedia_ = function(constraints, onSuccess, onError) {
    constraints = JSON.parse(JSON.stringify(constraints));
    if (constraints.audio) {
      constraints.audio = constraintsToChrome_(constraints.audio);
    }
    if (constraints.video) {
      constraints.video = constraintsToChrome_(constraints.video);
    }
    logging('chrome: ' + JSON.stringify(constraints));
    return navigator.webkitGetUserMedia(constraints, onSuccess, onError);
  };
  navigator.getUserMedia = getUserMedia_;

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

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

  // A shim for getUserMedia method on the mediaDevices object.
  // TODO(KaptenJansson) remove once implemented in Chrome stable.
  if (!navigator.mediaDevices.getUserMedia) {
    navigator.mediaDevices.getUserMedia = function(constraints) {
      return getUserMediaPromise_(constraints);
    };
  } else {
    // Even though Chrome 45 has navigator.mediaDevices and a getUserMedia
    // function which returns a Promise, it does not accept spec-style
    // constraints.
    var origGetUserMedia = navigator.mediaDevices.getUserMedia.
        bind(navigator.mediaDevices);
    navigator.mediaDevices.getUserMedia = function(c) {
      if (c) {
        logging('spec:   ' + JSON.stringify(c)); // whitespace for alignment
        c.audio = constraintsToChrome_(c.audio);
        c.video = constraintsToChrome_(c.video);
        logging('chrome: ' + JSON.stringify(c));
      }
      return origGetUserMedia(c);
    }.bind(this);
  }

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

},{"../utils.js":14}],20:[function(require,module,exports){
/*
 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 */
 /* eslint-env node */
'use strict';

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

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

  navigator.getUserMedia = getUserMedia_;

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

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

  if (browserDetails.version < 41) {
    // Work around http://bugzil.la/1169665
    var orgEnumerateDevices =
        navigator.mediaDevices.enumerateDevices.bind(navigator.mediaDevices);
    navigator.mediaDevices.enumerateDevices = function() {
      return orgEnumerateDevices().then(undefined, function(e) {
        if (e.name === 'NotFoundError') {
          return [];
        }
        throw e;
      });
    };
  }
};

},{"../utils":14}]},{},[1])(1)
});
;