text: /*
   The MIT License (MIT)
  
   Copyright (c) 2016 Meetecho
  
   Permission is hereby granted, free of charge, to any person obtaining
   a copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:
  
   The above copyright notice and this permission notice shall be included
   in all copies or substantial portions of the Software.
  
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   OTHER DEALINGS IN THE SOFTWARE.
   */
  
  /* eslint-disable */
  
  var adapter = require('webrtc-adapter');
  
  // List of sessions
  Janus.sessions = {};
  
  // Screensharing Chrome Extension ID
  Janus.extensionId = "hapfgfdkleiggjjpfpenajgdnfckjpaj";
  Janus.isExtensionEnabled = function() {
      if(window.navigator.userAgent.match('Chrome')) {
          var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(.*) /)[1], 10);
          var maxver = 33;
          if(window.navigator.userAgent.match('Linux'))
              maxver = 35;	// "known" crash in chrome 34 and 35 on linux
          if(chromever >= 26 && chromever <= maxver) {
              // Older versions of Chrome don't support this extension-based approach, so lie
              return true;
          }
          return Janus.checkJanusExtension();
      } else {
          // Firefox of others, no need for the extension (but this doesn't mean it will work)
          return true;
      }
  };
  
  Janus.useDefaultDependencies = function (deps) {
      var f = (deps && deps.fetch) || fetch;
      var p = (deps && deps.Promise) || Promise;
      var socketCls = (deps && deps.WebSocket) || WebSocket;
      return {
          newWebSocket: function(server, proto) { return new socketCls(server, proto); },
          isArray: function(arr) { return Array.isArray(arr); },
          checkJanusExtension: function() { return document.querySelector('#janus-extension-installed') !== null; },
          webRTCAdapter: (deps && deps.adapter) || adapter,
          httpAPICall: function(url, options) {
              var fetchOptions = {method: options.verb, cache: 'no-cache'};
              if(options.withCredentials !== undefined) {
                  fetchOptions.credentials = options.withCredentials === true ? 'include' : (options.withCredentials ? options.withCredentials : 'omit');
              }
              if(options.body !== undefined) {
                  fetchOptions.body = JSON.stringify(options.body);
              }
  
              var fetching = f(url, fetchOptions).catch(function(error) {
                  return p.reject({message: 'Probably a network error, is the gateway down?', error: error});
              });
  
              /*
               * fetch() does not natively support timeouts.
               * Work around this by starting a timeout manually, and racing it agains the fetch() to see which thing resolves first.
               */
  
              if(options.timeout !== undefined) {
                  var timeout = new p(function(resolve, reject) {
                      var timerId = setTimeout(function() {
                          clearTimeout(timerId);
                          return reject({message: 'Request timed out', timeout: options.timeout});
                      }, options.timeout);
                  });
                  fetching = p.race([fetching,timeout]);
              }
  
              fetching.then(function(response) {
                  if(response.ok) {
                      if(typeof(options.success) === typeof(Janus.noop)) {
                          return response.json().then(function(parsed) {
                              options.success(parsed);
                          }).catch(function(error) {
                              return p.reject({message: 'Failed to parse response body', error: error, response: response});
                          });
                      }
                  }
                  else {
                      return p.reject({message: 'API call failed', response: response});
                  }
              }).catch(function(error) {
                  if(typeof(options.error) === typeof(Janus.noop)) {
                      options.error(error.message || '<< internal error >>', error);
                  }
              });
  
              return fetching;
          }
      }
  };
  
  Janus.useOldDependencies = function (deps) {
      var jq = (deps && deps.jQuery) || jQuery;
      var socketCls = (deps && deps.WebSocket) || WebSocket;
      return {
          newWebSocket: function(server, proto) { return new socketCls(server, proto); },
          isArray: function(arr) { return jq.isArray(arr); },
          checkJanusExtension: function() { return jq('#janus-extension-installed').length > 0; },
          webRTCAdapter: (deps && deps.adapter) || adapter,
          httpAPICall: function(url, options) {
              var payload = options.body !== undefined ? {
                  contentType: 'application/json',
                  data: JSON.stringify(options.body)
              } : {};
              var credentials = options.withCredentials !== undefined ? {xhrFields: {withCredentials: options.withCredentials}} : {};
  
              return jq.ajax(jq.extend(payload, credentials, {
                  url: url,
                  type: options.verb,
                  cache: false,
                  dataType: 'json',
                  async: options.async,
                  timeout: options.timeout,
                  success: function(result) {
                      if(typeof(options.success) === typeof(Janus.noop)) {
                          options.success(result);
                      }
                  },
                  error: function(xhr, status, err) {
                      if(typeof(options.error) === typeof(Janus.noop)) {
                          options.error(status, err);
                      }
                  }
              }));
          },
      };
  };
  
  Janus.noop = function() {};
  
  // Initialization
  Janus.init = function(options) {
      options = options || {};
      options.callback = (typeof options.callback == "function") ? options.callback : Janus.noop;
      if(Janus.initDone === true) {
          // Already initialized
          options.callback();
      } else {
          if(typeof console == "undefined" || typeof console.log == "undefined")
              console = { log: function() {} };
          // Console logging (all debugging disabled by default)
          Janus.trace = Janus.noop;
          Janus.debug = Janus.noop;
          Janus.vdebug = Janus.noop;
          Janus.log = Janus.noop;
          Janus.warn = Janus.noop;
          Janus.error = Janus.noop;
          if(options.debug === true || options.debug === "all") {
              // Enable all debugging levels
              Janus.trace = console.trace.bind(console);
              Janus.debug = console.debug.bind(console);
              Janus.vdebug = console.debug.bind(console);
              Janus.log = console.log.bind(console);
              Janus.warn = console.warn.bind(console);
              Janus.error = console.error.bind(console);
          } else if(Array.isArray(options.debug)) {
              for(var i in options.debug) {
                  var d = options.debug[i];
                  switch(d) {
                  case "trace":
                      Janus.trace = console.trace.bind(console);
                      break;
                  case "debug":
                      Janus.debug = console.debug.bind(console);
                      break;
                  case "vdebug":
                      Janus.vdebug = console.debug.bind(console);
                      break;
                  case "log":
                      Janus.log = console.log.bind(console);
                      break;
                  case "warn":
                      Janus.warn = console.warn.bind(console);
                      break;
                  case "error":
                      Janus.error = console.error.bind(console);
                      break;
                  default:
                      console.error("Unknown debugging option '" + d + "' (supported: 'trace', 'debug', 'vdebug', 'log', warn', 'error')");
                      break;
                  }
              }
          }
          Janus.log("Initializing library");
  
          var usedDependencies = options.dependencies || Janus.useDefaultDependencies();
          Janus.isArray = usedDependencies.isArray;
          Janus.webRTCAdapter = usedDependencies.webRTCAdapter;
          Janus.httpAPICall = usedDependencies.httpAPICall;
          Janus.checkJanusExtension = usedDependencies.checkJanusExtension;
          Janus.newWebSocket = usedDependencies.newWebSocket;
  
          // Helper method to enumerate devices
          Janus.listDevices = function(callback, config) {
              callback = (typeof callback == "function") ? callback : Janus.noop;
              if (config == null) config = { audio: true, video: true };
              if(navigator.mediaDevices) {
                  navigator.mediaDevices.getUserMedia(config)
                  .then(function(stream) {
                      navigator.mediaDevices.enumerateDevices().then(function(devices) {
                          Janus.debug(devices);
                          callback(devices);
                          // Get rid of the now useless stream
                          try {
                              var tracks = stream.getTracks();
                              for(var i in tracks) {
                                  var mst = tracks[i];
                                  if(mst !== null && mst !== undefined)
                                      mst.stop();
                              }
                          } catch(e) {}
                      });
                  })
                  .catch(function(err) {
                      Janus.error(err);
                      callback([]);
                  });
              } else {
                  Janus.warn("navigator.mediaDevices unavailable");
                  callback([]);
              }
          }
          // Helper methods to attach/reattach a stream to a video element (previously part of adapter.js)
          Janus.attachMediaStream = function(element, stream) {
              if(Janus.webRTCAdapter.browserDetails.browser === 'chrome') {
                  var chromever = Janus.webRTCAdapter.browserDetails.version;
                  if(chromever >= 43) {
                      element.srcObject = stream;
                  } else if(typeof element.src !== 'undefined') {
                      element.src = URL.createObjectURL(stream);
                  } else {
                      Janus.error("Error attaching stream to element");
                  }
              } else {
                  element.srcObject = stream;
              }
          };
          Janus.reattachMediaStream = function(to, from) {
              if(Janus.webRTCAdapter.browserDetails.browser === 'chrome') {
                  var chromever = Janus.webRTCAdapter.browserDetails.version;
                  if(chromever >= 43) {
                      to.srcObject = from.srcObject;
                  } else if(typeof to.src !== 'undefined') {
                      to.src = from.src;
                  } else {
                      Janus.error("Error reattaching stream to element");
                  }
              } else {
                  to.srcObject = from.srcObject;
              }
          };
          // Detect tab close: make sure we don't loose existing onbeforeunload handlers
          var oldOBF = window.onbeforeunload;
          window.onbeforeunload = function() {
              Janus.log("Closing window");
              for(var s in Janus.sessions) {
                  if(Janus.sessions[s] !== null && Janus.sessions[s] !== undefined &&
                      Janus.sessions[s].destroyOnUnload) {
                      Janus.log("Destroying session " + s);
                      Janus.sessions[s].destroy({asyncRequest: false});
                  }
              }
              if(oldOBF && typeof oldOBF == "function")
                  oldOBF();
          }
          Janus.initDone = true;
          options.callback();
      }
  };
  
  // Helper method to check whether WebRTC is supported by this browser
  Janus.isWebrtcSupported = function() {
      return window.RTCPeerConnection !== undefined && window.RTCPeerConnection !== null &&
          navigator.getUserMedia !== undefined && navigator.getUserMedia !== null;
  };
  
  // Helper method to create random identifiers (e.g., transaction)
  Janus.randomString = function(len) {
      var charSet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
      var randomString = '';
      for (var i = 0; i < len; i++) {
          var randomPoz = Math.floor(Math.random() * charSet.length);
          randomString += charSet.substring(randomPoz,randomPoz+1);
      }
      return randomString;
  }
  
  
  function Janus(gatewayCallbacks) {
      if(Janus.initDone === undefined) {
          gatewayCallbacks.error("Library not initialized");
          return {};
      }
      if(!Janus.isWebrtcSupported()) {
          gatewayCallbacks.error("WebRTC not supported by this browser");
          return {};
      }
      Janus.log("Library initialized: " + Janus.initDone);
      gatewayCallbacks = gatewayCallbacks || {};
      gatewayCallbacks.success = (typeof gatewayCallbacks.success == "function") ? gatewayCallbacks.success : Janus.noop;
      gatewayCallbacks.error = (typeof gatewayCallbacks.error == "function") ? gatewayCallbacks.error : Janus.noop;
      gatewayCallbacks.destroyed = (typeof gatewayCallbacks.destroyed == "function") ? gatewayCallbacks.destroyed : Janus.noop;
      if(gatewayCallbacks.server === null || gatewayCallbacks.server === undefined) {
          gatewayCallbacks.error("Invalid gateway url");
          return {};
      }
      var websockets = false;
      var ws = null;
      var wsHandlers = {};
      var wsKeepaliveTimeoutId = null;
  
      var servers = null, serversIndex = 0;
      var server = gatewayCallbacks.server;
      if(Janus.isArray(server)) {
          Janus.log("Multiple servers provided (" + server.length + "), will use the first that works");
          server = null;
          servers = gatewayCallbacks.server;
          Janus.debug(servers);
      } else {
          if(server.indexOf("ws") === 0) {
              websockets = true;
              Janus.log("Using WebSockets to contact Janus: " + server);
          } else {
              websockets = false;
              Janus.log("Using REST API to contact Janus: " + server);
          }
      }
      var iceServers = gatewayCallbacks.iceServers;
      if(iceServers === undefined || iceServers === null)
          iceServers = [{urls: "stun:stun.l.google.com:19302"}];
      var iceTransportPolicy = gatewayCallbacks.iceTransportPolicy;
      var bundlePolicy = gatewayCallbacks.bundlePolicy;
      // Whether IPv6 candidates should be gathered
      var ipv6Support = gatewayCallbacks.ipv6;
      if(ipv6Support === undefined || ipv6Support === null)
          ipv6Support = false;
      // Whether we should enable the withCredentials flag for XHR requests
      var withCredentials = false;
      if(gatewayCallbacks.withCredentials !== undefined && gatewayCallbacks.withCredentials !== null)
          withCredentials = gatewayCallbacks.withCredentials === true;
      // Optional max events
      var maxev = null;
      if(gatewayCallbacks.max_poll_events !== undefined && gatewayCallbacks.max_poll_events !== null)
          maxev = gatewayCallbacks.max_poll_events;
      if(maxev < 1)
          maxev = 1;
      // Token to use (only if the token based authentication mechanism is enabled)
      var token = null;
      if(gatewayCallbacks.token !== undefined && gatewayCallbacks.token !== null)
          token = gatewayCallbacks.token;
      // API secret to use (only if the shared API secret is enabled)
      var apisecret = null;
      if(gatewayCallbacks.apisecret !== undefined && gatewayCallbacks.apisecret !== null)
          apisecret = gatewayCallbacks.apisecret;
      // Whether we should destroy this session when onbeforeunload is called
      this.destroyOnUnload = true;
      if(gatewayCallbacks.destroyOnUnload !== undefined && gatewayCallbacks.destroyOnUnload !== null)
          this.destroyOnUnload = (gatewayCallbacks.destroyOnUnload === true);
  
      var connected = false;
      var sessionId = null;
      var pluginHandles = {};
      var that = this;
      var retries = 0;
      var transactions = {};
      createSession(gatewayCallbacks);
  
      // Public methods
      this.getServer = function() { return server; };
      this.isConnected = function() { return connected; };
      this.getSessionId = function() { return sessionId; };
      this.destroy = function(callbacks) { destroySession(callbacks); };
      this.attach = function(callbacks) { createHandle(callbacks); };
  
      function eventHandler() {
          if(sessionId == null)
              return;
          Janus.debug('Long poll...');
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              return;
          }
          var longpoll = server + "/" + sessionId + "?rid=" + new Date().getTime();
          if(maxev !== undefined && maxev !== null)
              longpoll = longpoll + "&maxev=" + maxev;
          if(token !== null && token !== undefined)
              longpoll = longpoll + "&token=" + token;
          if(apisecret !== null && apisecret !== undefined)
              longpoll = longpoll + "&apisecret=" + apisecret;
          Janus.httpAPICall(longpoll, {
              verb: 'GET',
              withCredentials: withCredentials,
              success: handleEvent,
              timeout: 60000,	// FIXME
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);
                  retries++;
                  if(retries > 3) {
                      // Did we just lose the gateway? :-(
                      connected = false;
                      gatewayCallbacks.error("Lost connection to the gateway (is it down?)");
                      return;
                  }
                  eventHandler();
              }
          });
      }
  
      // Private event handler: this will trigger plugin callbacks, if set
      function handleEvent(json, skipTimeout) {
          retries = 0;
          if(!websockets && sessionId !== undefined && sessionId !== null && skipTimeout !== true)
              setTimeout(eventHandler, 200);
          if(!websockets && Janus.isArray(json)) {
              // We got an array: it means we passed a maxev > 1, iterate on all objects
              for(var i=0; i<json.length; i++) {
                  handleEvent(json[i], true);
              }
              return;
          }
          if(json["janus"] === "keepalive") {
              // Nothing happened
              Janus.vdebug("Got a keepalive on session " + sessionId);
              return;
          } else if(json["janus"] === "ack") {
              // Just an ack, we can probably ignore
              Janus.debug("Got an ack on session " + sessionId);
              Janus.debug(json);
              var transaction = json["transaction"];
              if(transaction !== null && transaction !== undefined) {
                  var reportSuccess = transactions[transaction];
                  if(reportSuccess !== null && reportSuccess !== undefined) {
                      reportSuccess(json);
                  }
                  delete transactions[transaction];
              }
              return;
          } else if(json["janus"] === "success") {
              // Success!
              Janus.debug("Got a success on session " + sessionId);
              Janus.debug(json);
              var transaction = json["transaction"];
              if(transaction !== null && transaction !== undefined) {
                  var reportSuccess = transactions[transaction];
                  if(reportSuccess !== null && reportSuccess !== undefined) {
                      reportSuccess(json);
                  }
                  delete transactions[transaction];
              }
              return;
          } else if(json["janus"] === "webrtcup") {
              // The PeerConnection with the gateway is up! Notify this
              Janus.debug("Got a webrtcup event on session " + sessionId);
              Janus.debug(json);
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  Janus.debug("This handle is not attached to this session");
                  return;
              }
              pluginHandle.webrtcState(true);
              return;
          } else if(json["janus"] === "hangup") {
              // A plugin asked the core to hangup a PeerConnection on one of our handles
              Janus.debug("Got a hangup event on session " + sessionId);
              Janus.debug(json);
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  Janus.debug("This handle is not attached to this session");
                  return;
              }
              pluginHandle.webrtcState(false, json["reason"]);
              pluginHandle.hangup();
          } else if(json["janus"] === "detached") {
              // A plugin asked the core to detach one of our handles
              Janus.debug("Got a detached event on session " + sessionId);
              Janus.debug(json);
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  // Don't warn here because destroyHandle causes this situation.
                  return;
              }
              pluginHandle.detached = true;
              pluginHandle.ondetached();
              pluginHandle.detach();
          } else if(json["janus"] === "media") {
              // Media started/stopped flowing
              Janus.debug("Got a media event on session " + sessionId);
              Janus.debug(json);
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  Janus.debug("This handle is not attached to this session");
                  return;
              }
              pluginHandle.mediaState(json["type"], json["receiving"]);
          } else if(json["janus"] === "slowlink") {
              Janus.debug("Got a slowlink event on session " + sessionId);
              Janus.debug(json);
              // Trouble uplink or downlink
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  Janus.debug("This handle is not attached to this session");
                  return;
              }
              pluginHandle.slowLink(json["uplink"], json["nacks"]);
          } else if(json["janus"] === "error") {
              // Oops, something wrong happened
              Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
              Janus.debug(json);
              var transaction = json["transaction"];
              if(transaction !== null && transaction !== undefined) {
                  var reportSuccess = transactions[transaction];
                  if(reportSuccess !== null && reportSuccess !== undefined) {
                      reportSuccess(json);
                  }
                  delete transactions[transaction];
              }
              return;
          } else if(json["janus"] === "event") {
              Janus.debug("Got a plugin event on session " + sessionId);
              Janus.debug(json);
              var sender = json["sender"];
              if(sender === undefined || sender === null) {
                  Janus.warn("Missing sender...");
                  return;
              }
              var plugindata = json["plugindata"];
              if(plugindata === undefined || plugindata === null) {
                  Janus.warn("Missing plugindata...");
                  return;
              }
              Janus.debug("  -- Event is coming from " + sender + " (" + plugindata["plugin"] + ")");
              var data = plugindata["data"];
              Janus.debug(data);
              var pluginHandle = pluginHandles[sender];
              if(pluginHandle === undefined || pluginHandle === null) {
                  Janus.warn("This handle is not attached to this session");
                  return;
              }
              var jsep = json["jsep"];
              if(jsep !== undefined && jsep !== null) {
                  Janus.debug("Handling SDP as well...");
                  Janus.debug(jsep);
              }
              var callback = pluginHandle.onmessage;
              if(callback !== null && callback !== undefined) {
                  Janus.debug("Notifying application...");
                  // Send to callback specified when attaching plugin handle
                  callback(data, jsep);
              } else {
                  // Send to generic callback (?)
                  Janus.debug("No provided notification callback");
              }
          } else {
              Janus.warn("Unkown message/event  '" + json["janus"] + "' on session " + sessionId);
              Janus.debug(json);
          }
      }
  
      // Private helper to send keep-alive messages on WebSockets
      function keepAlive() {
          if(server === null || !websockets || !connected)
              return;
          wsKeepaliveTimeoutId = setTimeout(keepAlive, 30000);
          var request = { "janus": "keepalive", "session_id": sessionId, "transaction": Janus.randomString(12) };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          ws.send(JSON.stringify(request));
      }
  
      // Private method to create a session
      function createSession(callbacks) {
          var transaction = Janus.randomString(12);
          var request = { "janus": "create", "transaction": transaction };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          if(server === null && Janus.isArray(servers)) {
              // We still need to find a working server from the list we were given
              server = servers[serversIndex];
              if(server.indexOf("ws") === 0) {
                  websockets = true;
                  Janus.log("Server #" + (serversIndex+1) + ": trying WebSockets to contact Janus (" + server + ")");
              } else {
                  websockets = false;
                  Janus.log("Server #" + (serversIndex+1) + ": trying REST API to contact Janus (" + server + ")");
              }
          }
          if(websockets) {
              ws = Janus.newWebSocket(server, 'janus-protocol');
              wsHandlers = {
                  'error': function() {
                      Janus.error("Error connecting to the Janus WebSockets server... " + server);
                      if (Janus.isArray(servers)) {
                          serversIndex++;
                          if (serversIndex == servers.length) {
                              // We tried all the servers the user gave us and they all failed
                              callbacks.error("Error connecting to any of the provided Janus servers: Is the gateway down?");
                              return;
                          }
                          // Let's try the next server
                          server = null;
                          setTimeout(function() {
                              createSession(callbacks);
                          }, 200);
                          return;
                      }
                      callbacks.error("Error connecting to the Janus WebSockets server: Is the gateway down?");
                  },
  
                  'open': function() {
                      // We need to be notified about the success
                      transactions[transaction] = function(json) {
                          Janus.debug(json);
                          if (json["janus"] !== "success") {
                              Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                              callbacks.error(json["error"].reason);
                              return;
                          }
                          wsKeepaliveTimeoutId = setTimeout(keepAlive, 30000);
                          connected = true;
                          sessionId = json.data["id"];
                          Janus.log("Created session: " + sessionId);
                          Janus.sessions[sessionId] = that;
                          callbacks.success();
                      };
                      ws.send(JSON.stringify(request));
                  },
  
                  'message': function(event) {
                      handleEvent(JSON.parse(event.data));
                  },
  
                  'close': function() {
                      if (server === null || !connected) {
                          return;
                      }
                      connected = false;
                      // FIXME What if this is called when the page is closed?
                      gatewayCallbacks.error("Lost connection to the gateway (is it down?)");
                  }
              };
  
              for(var eventName in wsHandlers) {
                  ws.addEventListener(eventName, wsHandlers[eventName]);
              }
  
              return;
          }
          Janus.httpAPICall(server, {
              verb: 'POST',
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.debug(json);
                  if(json["janus"] !== "success") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                      callbacks.error(json["error"].reason);
                      return;
                  }
                  connected = true;
                  sessionId = json.data["id"];
                  Janus.log("Created session: " + sessionId);
                  Janus.sessions[sessionId] = that;
                  eventHandler();
                  callbacks.success();
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
                  if(Janus.isArray(servers)) {
                      serversIndex++;
                      if(serversIndex == servers.length) {
                          // We tried all the servers the user gave us and they all failed
                          callbacks.error("Error connecting to any of the provided Janus servers: Is the gateway down?");
                          return;
                      }
                      // Let's try the next server
                      server = null;
                      setTimeout(function() { createSession(callbacks); }, 200);
                      return;
                  }
                  if(errorThrown === "")
                      callbacks.error(textStatus + ": Is the gateway down?");
                  else
                      callbacks.error(textStatus + ": " + errorThrown);
              }
          });
      }
  
      // Private method to destroy a session
      function destroySession(callbacks) {
          callbacks = callbacks || {};
          // FIXME This method triggers a success even when we fail
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          var asyncRequest = true;
          if(callbacks.asyncRequest !== undefined && callbacks.asyncRequest !== null)
              asyncRequest = (callbacks.asyncRequest === true);
          Janus.log("Destroying session " + sessionId + " (async=" + asyncRequest + ")");
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              callbacks.success();
              return;
          }
          if(sessionId === undefined || sessionId === null) {
              Janus.warn("No session to destroy");
              callbacks.success();
              gatewayCallbacks.destroyed();
              return;
          }
          delete Janus.sessions[sessionId];
          // No need to destroy all handles first, Janus will do that itself
          var request = { "janus": "destroy", "transaction": Janus.randomString(12) };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          if(websockets) {
              request["session_id"] = sessionId;
  
              var unbindWebSocket = function() {
                  for(var eventName in wsHandlers) {
                      ws.removeEventListener(eventName, wsHandlers[eventName]);
                  }
                  ws.removeEventListener('message', onUnbindMessage);
                  ws.removeEventListener('error', onUnbindError);
                  if(wsKeepaliveTimeoutId) {
                      clearTimeout(wsKeepaliveTimeoutId);
                  }
              };
  
              var onUnbindMessage = function(event){
                  var data = JSON.parse(event.data);
                  if(data.session_id == request.session_id && data.transaction == request.transaction) {
                      unbindWebSocket();
                      callbacks.success();
                      gatewayCallbacks.destroyed();
                  }
              };
              var onUnbindError = function(event) {
                  unbindWebSocket();
                  callbacks.error("Failed to destroy the gateway: Is the gateway down?");
                  gatewayCallbacks.destroyed();
              };
  
              ws.addEventListener('message', onUnbindMessage);
              ws.addEventListener('error', onUnbindError);
  
              ws.send(JSON.stringify(request));
              return;
          }
          Janus.httpAPICall(server + "/" + sessionId, {
              verb: 'POST',
              async: asyncRequest,	// Sometimes we need false here, or destroying in onbeforeunload won't work
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.log("Destroyed session:");
                  Janus.debug(json);
                  sessionId = null;
                  connected = false;
                  if(json["janus"] !== "success") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                  }
                  callbacks.success();
                  gatewayCallbacks.destroyed();
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
                  // Reset everything anyway
                  sessionId = null;
                  connected = false;
                  callbacks.success();
                  gatewayCallbacks.destroyed();
              }
          });
      }
  
      // Private method to create a plugin handle
      function createHandle(callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          callbacks.consentDialog = (typeof callbacks.consentDialog == "function") ? callbacks.consentDialog : Janus.noop;
          callbacks.iceState = (typeof callbacks.iceState == "function") ? callbacks.iceState : Janus.noop;
          callbacks.mediaState = (typeof callbacks.mediaState == "function") ? callbacks.mediaState : Janus.noop;
          callbacks.webrtcState = (typeof callbacks.webrtcState == "function") ? callbacks.webrtcState : Janus.noop;
          callbacks.slowLink = (typeof callbacks.slowLink == "function") ? callbacks.slowLink : Janus.noop;
          callbacks.onmessage = (typeof callbacks.onmessage == "function") ? callbacks.onmessage : Janus.noop;
          callbacks.onlocalstream = (typeof callbacks.onlocalstream == "function") ? callbacks.onlocalstream : Janus.noop;
          callbacks.onremotestream = (typeof callbacks.onremotestream == "function") ? callbacks.onremotestream : Janus.noop;
          callbacks.ondata = (typeof callbacks.ondata == "function") ? callbacks.ondata : Janus.noop;
          callbacks.ondataopen = (typeof callbacks.ondataopen == "function") ? callbacks.ondataopen : Janus.noop;
          callbacks.oncleanup = (typeof callbacks.oncleanup == "function") ? callbacks.oncleanup : Janus.noop;
          callbacks.ondetached = (typeof callbacks.ondetached == "function") ? callbacks.ondetached : Janus.noop;
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              callbacks.error("Is the gateway down? (connected=false)");
              return;
          }
          var plugin = callbacks.plugin;
          if(plugin === undefined || plugin === null) {
              Janus.error("Invalid plugin");
              callbacks.error("Invalid plugin");
              return;
          }
          var opaqueId = callbacks.opaqueId;
          var transaction = Janus.randomString(12);
          var request = { "janus": "attach", "plugin": plugin, "opaque_id": opaqueId, "transaction": transaction };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          // If we know the browser supports BUNDLE and/or rtcp-mux, let's advertise those right away
          if(Janus.webRTCAdapter.browserDetails.browser == "chrome" || Janus.webRTCAdapter.browserDetails.browser == "firefox" ||
              Janus.webRTCAdapter.browserDetails.browser == "safari") {
              request["force-bundle"] = true;
              request["force-rtcp-mux"] = true;
          }
          if(websockets) {
              transactions[transaction] = function(json) {
                  Janus.debug(json);
                  if(json["janus"] !== "success") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                      callbacks.error("Ooops: " + json["error"].code + " " + json["error"].reason);
                      return;
                  }
                  var handleId = json.data["id"];
                  Janus.log("Created handle: " + handleId);
                  var pluginHandle =
                      {
                          session : that,
                          plugin : plugin,
                          id : handleId,
                          detached : false,
                          webrtcStuff : {
                              started : false,
                              myStream : null,
                              streamExternal : false,
                              remoteStream : null,
                              mySdp : null,
                              pc : null,
                              dataChannel : null,
                              dtmfSender : null,
                              trickle : true,
                              iceDone : false,
                              sdpSent : false,
                              volume : {
                                  value : null,
                                  timer : null
                              },
                              bitrate : {
                                  value : null,
                                  bsnow : null,
                                  bsbefore : null,
                                  tsnow : null,
                                  tsbefore : null,
                                  timer : null
                              }
                          },
                          getId : function() { return handleId; },
                          getPlugin : function() { return plugin; },
                          getVolume : function() { return getVolume(handleId); },
                          isAudioMuted : function() { return isMuted(handleId, false); },
                          muteAudio : function() { return mute(handleId, false, true); },
                          unmuteAudio : function() { return mute(handleId, false, false); },
                          isVideoMuted : function() { return isMuted(handleId, true); },
                          muteVideo : function() { return mute(handleId, true, true); },
                          unmuteVideo : function() { return mute(handleId, true, false); },
                          getBitrate : function() { return getBitrate(handleId); },
                          send : function(callbacks) { sendMessage(handleId, callbacks); },
                          data : function(callbacks) { sendData(handleId, callbacks); },
                          dtmf : function(callbacks) { sendDtmf(handleId, callbacks); },
                          consentDialog : callbacks.consentDialog,
                          iceState : callbacks.iceState,
                          mediaState : callbacks.mediaState,
                          webrtcState : callbacks.webrtcState,
                          slowLink : callbacks.slowLink,
                          onmessage : callbacks.onmessage,
                          createOffer : function(callbacks) { prepareWebrtc(handleId, callbacks); },
                          createAnswer : function(callbacks) { prepareWebrtc(handleId, callbacks); },
                          handleRemoteJsep : function(callbacks) { prepareWebrtcPeer(handleId, callbacks); },
                          onlocalstream : callbacks.onlocalstream,
                          onremotestream : callbacks.onremotestream,
                          ondata : callbacks.ondata,
                          ondataopen : callbacks.ondataopen,
                          oncleanup : callbacks.oncleanup,
                          ondetached : callbacks.ondetached,
                          hangup : function(sendRequest) { cleanupWebrtc(handleId, sendRequest === true); },
                          detach : function(callbacks) { destroyHandle(handleId, callbacks); }
                      }
                  pluginHandles[handleId] = pluginHandle;
                  callbacks.success(pluginHandle);
              };
              request["session_id"] = sessionId;
              ws.send(JSON.stringify(request));
              return;
          }
          Janus.httpAPICall(server + "/" + sessionId, {
              verb: 'POST',
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.debug(json);
                  if(json["janus"] !== "success") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                      callbacks.error("Ooops: " + json["error"].code + " " + json["error"].reason);
                      return;
                  }
                  var handleId = json.data["id"];
                  Janus.log("Created handle: " + handleId);
                  var pluginHandle =
                      {
                          session : that,
                          plugin : plugin,
                          id : handleId,
                          detached : false,
                          webrtcStuff : {
                              started : false,
                              myStream : null,
                              streamExternal : false,
                              remoteStream : null,
                              mySdp : null,
                              pc : null,
                              dataChannel : null,
                              dtmfSender : null,
                              trickle : true,
                              iceDone : false,
                              sdpSent : false,
                              volume : {
                                  value : null,
                                  timer : null
                              },
                              bitrate : {
                                  value : null,
                                  bsnow : null,
                                  bsbefore : null,
                                  tsnow : null,
                                  tsbefore : null,
                                  timer : null
                              }
                          },
                          getId : function() { return handleId; },
                          getPlugin : function() { return plugin; },
                          getVolume : function() { return getVolume(handleId); },
                          isAudioMuted : function() { return isMuted(handleId, false); },
                          muteAudio : function() { return mute(handleId, false, true); },
                          unmuteAudio : function() { return mute(handleId, false, false); },
                          isVideoMuted : function() { return isMuted(handleId, true); },
                          muteVideo : function() { return mute(handleId, true, true); },
                          unmuteVideo : function() { return mute(handleId, true, false); },
                          getBitrate : function() { return getBitrate(handleId); },
                          send : function(callbacks) { sendMessage(handleId, callbacks); },
                          data : function(callbacks) { sendData(handleId, callbacks); },
                          dtmf : function(callbacks) { sendDtmf(handleId, callbacks); },
                          consentDialog : callbacks.consentDialog,
                          iceState : callbacks.iceState,
                          mediaState : callbacks.mediaState,
                          webrtcState : callbacks.webrtcState,
                          slowLink : callbacks.slowLink,
                          onmessage : callbacks.onmessage,
                          createOffer : function(callbacks) { prepareWebrtc(handleId, callbacks); },
                          createAnswer : function(callbacks) { prepareWebrtc(handleId, callbacks); },
                          handleRemoteJsep : function(callbacks) { prepareWebrtcPeer(handleId, callbacks); },
                          onlocalstream : callbacks.onlocalstream,
                          onremotestream : callbacks.onremotestream,
                          ondata : callbacks.ondata,
                          ondataopen : callbacks.ondataopen,
                          oncleanup : callbacks.oncleanup,
                          ondetached : callbacks.ondetached,
                          hangup : function(sendRequest) { cleanupWebrtc(handleId, sendRequest === true); },
                          detach : function(callbacks) { destroyHandle(handleId, callbacks); }
                      }
                  pluginHandles[handleId] = pluginHandle;
                  callbacks.success(pluginHandle);
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
              }
          });
      }
  
      // Private method to send a message
      function sendMessage(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              callbacks.error("Is the gateway down? (connected=false)");
              return;
          }
          var message = callbacks.message;
          var jsep = callbacks.jsep;
          var transaction = Janus.randomString(12);
          var request = { "janus": "message", "body": message, "transaction": transaction };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          if(jsep !== null && jsep !== undefined)
              request.jsep = jsep;
          Janus.debug("Sending message to plugin (handle=" + handleId + "):");
          Janus.debug(request);
          if(websockets) {
              request["session_id"] = sessionId;
              request["handle_id"] = handleId;
              transactions[transaction] = function(json) {
                  Janus.debug("Message sent!");
                  Janus.debug(json);
                  if(json["janus"] === "success") {
                      // We got a success, must have been a synchronous transaction
                      var plugindata = json["plugindata"];
                      if(plugindata === undefined || plugindata === null) {
                          Janus.warn("Request succeeded, but missing plugindata...");
                          callbacks.success();
                          return;
                      }
                      Janus.log("Synchronous transaction successful (" + plugindata["plugin"] + ")");
                      var data = plugindata["data"];
                      Janus.debug(data);
                      callbacks.success(data);
                      return;
                  } else if(json["janus"] !== "ack") {
                      // Not a success and not an ack, must be an error
                      if(json["error"] !== undefined && json["error"] !== null) {
                          Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                          callbacks.error(json["error"].code + " " + json["error"].reason);
                      } else {
                          Janus.error("Unknown error");	// FIXME
                          callbacks.error("Unknown error");
                      }
                      return;
                  }
                  // If we got here, the plugin decided to handle the request asynchronously
                  callbacks.success();
              };
              ws.send(JSON.stringify(request));
              return;
          }
          Janus.httpAPICall(server + "/" + sessionId + "/" + handleId, {
              verb: 'POST',
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.debug("Message sent!");
                  Janus.debug(json);
                  if(json["janus"] === "success") {
                      // We got a success, must have been a synchronous transaction
                      var plugindata = json["plugindata"];
                      if(plugindata === undefined || plugindata === null) {
                          Janus.warn("Request succeeded, but missing plugindata...");
                          callbacks.success();
                          return;
                      }
                      Janus.log("Synchronous transaction successful (" + plugindata["plugin"] + ")");
                      var data = plugindata["data"];
                      Janus.debug(data);
                      callbacks.success(data);
                      return;
                  } else if(json["janus"] !== "ack") {
                      // Not a success and not an ack, must be an error
                      if(json["error"] !== undefined && json["error"] !== null) {
                          Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                          callbacks.error(json["error"].code + " " + json["error"].reason);
                      } else {
                          Janus.error("Unknown error");	// FIXME
                          callbacks.error("Unknown error");
                      }
                      return;
                  }
                  // If we got here, the plugin decided to handle the request asynchronously
                  callbacks.success();
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
                  callbacks.error(textStatus + ": " + errorThrown);
              }
          });
      }
  
      // Private method to send a trickle candidate
      function sendTrickleCandidate(handleId, candidate) {
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              return;
          }
          var request = { "janus": "trickle", "candidate": candidate, "transaction": Janus.randomString(12) };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          Janus.vdebug("Sending trickle candidate (handle=" + handleId + "):");
          Janus.vdebug(request);
          if(websockets) {
              request["session_id"] = sessionId;
              request["handle_id"] = handleId;
              ws.send(JSON.stringify(request));
              return;
          }
          Janus.httpAPICall(server + "/" + sessionId + "/" + handleId, {
              verb: 'POST',
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.vdebug("Candidate sent!");
                  Janus.vdebug(json);
                  if(json["janus"] !== "ack") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                      return;
                  }
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
              }
          });
      }
  
      // Private method to send a data channel message
      function sendData(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          var text = callbacks.text;
          if(text === null || text === undefined) {
              Janus.warn("Invalid text");
              callbacks.error("Invalid text");
              return;
          }
          Janus.log("Sending string on data channel: " + text);
          config.dataChannel.send(text);
          callbacks.success();
      }
  
      // Private method to send a DTMF tone
      function sendDtmf(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          if(config.dtmfSender === null || config.dtmfSender === undefined) {
              // Create the DTMF sender, if possible
              if(config.myStream !== undefined && config.myStream !== null) {
                  var tracks = config.myStream.getAudioTracks();
                  if(tracks !== null && tracks !== undefined && tracks.length > 0) {
                      var local_audio_track = tracks[0];
                      config.dtmfSender = config.pc.createDTMFSender(local_audio_track);
                      Janus.log("Created DTMF Sender");
                      config.dtmfSender.ontonechange = function(tone) { Janus.debug("Sent DTMF tone: " + tone.tone); };
                  }
              }
              if(config.dtmfSender === null || config.dtmfSender === undefined) {
                  Janus.warn("Invalid DTMF configuration");
                  callbacks.error("Invalid DTMF configuration");
                  return;
              }
          }
          var dtmf = callbacks.dtmf;
          if(dtmf === null || dtmf === undefined) {
              Janus.warn("Invalid DTMF parameters");
              callbacks.error("Invalid DTMF parameters");
              return;
          }
          var tones = dtmf.tones;
          if(tones === null || tones === undefined) {
              Janus.warn("Invalid DTMF string");
              callbacks.error("Invalid DTMF string");
              return;
          }
          var duration = dtmf.duration;
          if(duration === null || duration === undefined)
              duration = 500;	// We choose 500ms as the default duration for a tone
          var gap = dtmf.gap;
          if(gap === null || gap === undefined)
              gap = 50;	// We choose 50ms as the default gap between tones
          Janus.debug("Sending DTMF string " + tones + " (duration " + duration + "ms, gap " + gap + "ms)");
          config.dtmfSender.insertDTMF(tones, duration, gap);
      }
  
      // Private method to destroy a plugin handle
      function destroyHandle(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          Janus.warn(callbacks);
          var asyncRequest = true;
          if(callbacks.asyncRequest !== undefined && callbacks.asyncRequest !== null)
              asyncRequest = (callbacks.asyncRequest === true);
          Janus.log("Destroying handle " + handleId + " (async=" + asyncRequest + ")");
          cleanupWebrtc(handleId);
          if (pluginHandles[handleId].detached) {
              // Plugin was already detached by Janus, calling detach again will return a handle not found error, so just exit here
              delete pluginHandles[handleId];
              callbacks.success();
              return;
          }
          if(!connected) {
              Janus.warn("Is the gateway down? (connected=false)");
              callbacks.error("Is the gateway down? (connected=false)");
              return;
          }
          var request = { "janus": "detach", "transaction": Janus.randomString(12) };
          if(token !== null && token !== undefined)
              request["token"] = token;
          if(apisecret !== null && apisecret !== undefined)
              request["apisecret"] = apisecret;
          if(websockets) {
              request["session_id"] = sessionId;
              request["handle_id"] = handleId;
              ws.send(JSON.stringify(request));
              delete pluginHandles[handleId];
              callbacks.success();
              return;
          }
          Janus.httpAPICall(server + "/" + sessionId + "/" + handleId, {
              verb: 'POST',
              async: asyncRequest,	// Sometimes we need false here, or destroying in onbeforeunload won't work
              withCredentials: withCredentials,
              body: request,
              success: function(json) {
                  Janus.log("Destroyed handle:");
                  Janus.debug(json);
                  if(json["janus"] !== "success") {
                      Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason);	// FIXME
                  }
                  delete pluginHandles[handleId];
                  callbacks.success();
              },
              error: function(textStatus, errorThrown) {
                  Janus.error(textStatus + ": " + errorThrown);	// FIXME
                  // We cleanup anyway
                  delete pluginHandles[handleId];
                  callbacks.success();
              }
          });
      }
  
      // WebRTC stuff
      function streamsDone(handleId, jsep, media, callbacks, stream) {
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          Janus.debug("streamsDone:", stream);
          config.myStream = stream;
          var pc_config = {"iceServers": iceServers, "iceTransportPolicy": iceTransportPolicy, "bundlePolicy": bundlePolicy};
          //~ var pc_constraints = {'mandatory': {'MozDontOfferDataChannel':true}};
          var pc_constraints = {
              "optional": [{"DtlsSrtpKeyAgreement": true}]
          };
          if(ipv6Support === true) {
              // FIXME This is only supported in Chrome right now
              // For support in Firefox track this: https://bugzilla.mozilla.org/show_bug.cgi?id=797262
              pc_constraints.optional.push({"googIPv6":true});
          }
          // Any custom constraint to add?
          if(callbacks.rtcConstraints && typeof callbacks.rtcConstraints === 'object') {
              Janus.debug("Adding custom PeerConnection constraints:", callbacks.rtcConstraints);
              for(var i in callbacks.rtcConstraints) {
                  pc_constraints.optional.push(callbacks.rtcConstraints[i]);
              }
          }
          if(Janus.webRTCAdapter.browserDetails.browser === "edge") {
              // This is Edge, enable BUNDLE explicitly
              pc_config.bundlePolicy = "max-bundle";
          }
          Janus.log("Creating PeerConnection");
          Janus.debug(pc_constraints);
          config.pc = new RTCPeerConnection(pc_config, pc_constraints);
          Janus.debug(config.pc);
          if(config.pc.getStats) {	// FIXME
              config.volume.value = 0;
              config.bitrate.value = "0 kbits/sec";
          }
          Janus.log("Preparing local SDP and gathering candidates (trickle=" + config.trickle + ")");
          config.pc.oniceconnectionstatechange = function(e) {
              if(config.pc)
                  pluginHandle.iceState(config.pc.iceConnectionState);
          };
          config.pc.onicecandidate = function(event) {
              if (event.candidate == null ||
                  (Janus.webRTCAdapter.browserDetails.browser === 'edge' && event.candidate.candidate.indexOf('endOfCandidates') > 0)) {
                  Janus.log("End of candidates.");
                  config.iceDone = true;
                  if(config.trickle === true) {
                      // Notify end of candidates
                      sendTrickleCandidate(handleId, {"completed": true});
                  } else {
                      // No trickle, time to send the complete SDP (including all candidates)
                      sendSDP(handleId, callbacks);
                  }
              } else {
                  // JSON.stringify doesn't work on some WebRTC objects anymore
                  // See https://code.google.com/p/chromium/issues/detail?id=467366
                  var candidate = {
                      "candidate": event.candidate.candidate,
                      "sdpMid": event.candidate.sdpMid,
                      "sdpMLineIndex": event.candidate.sdpMLineIndex
                  };
                  if(config.trickle === true) {
                      // Send candidate
                      sendTrickleCandidate(handleId, candidate);
                  }
              }
          };
          if(stream !== null && stream !== undefined) {
              Janus.log('Adding local stream');
              stream.getTracks().forEach(function(track) { config.pc.addTrack(track, stream); });
              pluginHandle.onlocalstream(stream);
          }
          config.pc.ontrack = function(event) {
              Janus.log("Handling Remote Track");
              Janus.debug(event);
              if(!event.streams)
                  return;
              config.remoteStream = event.streams[0];
              pluginHandle.onremotestream(config.remoteStream);
          };
          // Any data channel to create?
          if(isDataEnabled(media)) {
              Janus.log("Creating data channel");
              var onDataChannelMessage = function(event) {
                  Janus.log('Received message on data channel: ' + event.data);
                  pluginHandle.ondata(event.data);	// FIXME
              }
              var onDataChannelStateChange = function() {
                  var dcState = config.dataChannel !== null ? config.dataChannel.readyState : "null";
                  Janus.log('State change on data channel: ' + dcState);
                  if(dcState === 'open') {
                      pluginHandle.ondataopen();	// FIXME
                  }
              }
              var onDataChannelError = function(error) {
                  Janus.error('Got error on data channel:', error);
                  // TODO
              }
              // Until we implement the proxying of open requests within the Janus core, we open a channel ourselves whatever the case
              config.dataChannel = config.pc.createDataChannel("JanusDataChannel", {ordered:false});	// FIXME Add options (ordered, maxRetransmits, etc.)
              config.dataChannel.onmessage = onDataChannelMessage;
              config.dataChannel.onopen = onDataChannelStateChange;
              config.dataChannel.onclose = onDataChannelStateChange;
              config.dataChannel.onerror = onDataChannelError;
          }
          // Create offer/answer now
          if(jsep === null || jsep === undefined) {
              createOffer(handleId, media, callbacks);
          } else {
              config.pc.setRemoteDescription(
                  new RTCSessionDescription(jsep),
                  function() {
                      Janus.log("Remote description accepted!");
                      createAnswer(handleId, media, callbacks);
                  }, callbacks.error);
          }
      }
  
      function prepareWebrtc(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : webrtcError;
          var jsep = callbacks.jsep;
          var media = callbacks.media;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          // Are we updating a session?
          if(config.pc !== undefined && config.pc !== null) {
              Janus.log("Updating existing media session");
              // Create offer/answer now
              if(jsep === null || jsep === undefined) {
                  createOffer(handleId, media, callbacks);
              } else {
                  config.pc.setRemoteDescription(
                      new RTCSessionDescription(jsep),
                      function() {
                          Janus.log("Remote description accepted!");
                          createAnswer(handleId, media, callbacks);
                      }, callbacks.error);
              }
              return;
          }
          config.trickle = isTrickleEnabled(callbacks.trickle);
          // Was a MediaStream object passed, or do we need to take care of that?
          if(callbacks.stream !== null && callbacks.stream !== undefined) {
              var stream = callbacks.stream;
              Janus.log("MediaStream provided by the application");
              Janus.debug(stream);
              // Skip the getUserMedia part
              config.streamExternal = true;
              streamsDone(handleId, jsep, media, callbacks, stream);
              return;
          }
          if(isAudioSendEnabled(media) || isVideoSendEnabled(media)) {
              var constraints = { mandatory: {}, optional: []};
              pluginHandle.consentDialog(true);
              var audioSupport = isAudioSendEnabled(media);
              if(audioSupport === true && media != undefined && media != null) {
                  if(typeof media.audio === 'object') {
                      audioSupport = media.audio;
                  }
              }
              var videoSupport = isVideoSendEnabled(media);
              if(videoSupport === true && media != undefined && media != null) {
                  var simulcast = callbacks.simulcast === true ? true : false;
                  if(simulcast && !jsep && (media.video === undefined || media.video === false))
                      media.video = "hires";
                  if(media.video && media.video != 'screen' && media.video != 'window') {
                      var width = 0;
                      var height = 0, maxHeight = 0;
                      if(media.video === 'lowres') {
                          // Small resolution, 4:3
                          height = 240;
                          maxHeight = 240;
                          width = 320;
                      } else if(media.video === 'lowres-16:9') {
                          // Small resolution, 16:9
                          height = 180;
                          maxHeight = 180;
                          width = 320;
                      } else if(media.video === 'hires' || media.video === 'hires-16:9' ) {
                          // High resolution is only 16:9
                          height = 720;
                          maxHeight = 720;
                          width = 1280;
                          if(navigator.mozGetUserMedia) {
                              var firefoxVer = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
                              if(firefoxVer < 38) {
                                  // Unless this is and old Firefox, which doesn't support it
                                  Janus.warn(media.video + " unsupported, falling back to stdres (old Firefox)");
                                  height = 480;
                                  maxHeight = 480;
                                  width  = 640;
                              }
                          }
                      } else if(media.video === 'stdres') {
                          // Normal resolution, 4:3
                          height = 480;
                          maxHeight = 480;
                          width  = 640;
                      } else if(media.video === 'stdres-16:9') {
                          // Normal resolution, 16:9
                          height = 360;
                          maxHeight = 360;
                          width = 640;
                      } else {
                          Janus.log("Default video setting is stdres 4:3");
                          height = 480;
                          maxHeight = 480;
                          width = 640;
                      }
                      Janus.log("Adding media constraint:", media.video);
                      if(navigator.mozGetUserMedia) {
                          var firefoxVer = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
                          if(firefoxVer < 38) {
                              videoSupport = {
                                  'require': ['height', 'width'],
                                  'height': {'max': maxHeight, 'min': height},
                                  'width':  {'max': width,  'min': width}
                              };
                          } else {
                              // http://stackoverflow.com/questions/28282385/webrtc-firefox-constraints/28911694#28911694
                              // https://github.com/meetecho/janus-gateway/pull/246
                              videoSupport = {
                                  'height': {'ideal': height},
                                  'width':  {'ideal': width}
                              };
                          }
                      } else {
                          videoSupport = {
                              'mandatory': {
                                  'maxHeight': maxHeight,
                                  'minHeight': height,
                                  'maxWidth':  width,
                                  'minWidth':  width
                              },
                              'optional': []
                          };
                      }
                      if(typeof media.video === 'object') {
                          videoSupport = media.video;
                      }
                      Janus.debug(videoSupport);
                  } else if(media.video === 'screen' || media.video === 'window') {
                      if(!media.screenshareFrameRate) {
                          media.screenshareFrameRate = 3;
                      }
                      // Not a webcam, but screen capture
                      if(window.location.protocol !== 'https:') {
                          // Screen sharing mandates HTTPS
                          Janus.warn("Screen sharing only works on HTTPS, try the https:// version of this page");
                          pluginHandle.consentDialog(false);
                          callbacks.error("Screen sharing only works on HTTPS, try the https:// version of this page");
                          return;
                      }
                      // We're going to try and use the extension for Chrome 34+, the old approach
                      // for older versions of Chrome, or the experimental support in Firefox 33+
                      var cache = {};
                      function callbackUserMedia (error, stream) {
                          pluginHandle.consentDialog(false);
                          if(error) {
                              callbacks.error({code: error.code, name: error.name, message: error.message});
                          } else {
                              streamsDone(handleId, jsep, media, callbacks, stream);
                          }
                      };
                      function getScreenMedia(constraints, gsmCallback, useAudio) {
                          Janus.log("Adding media constraint (screen capture)");
                          Janus.debug(constraints);
                          navigator.mediaDevices.getUserMedia(constraints)
                          .then(function(stream) {
                              if(useAudio){
                                  navigator.mediaDevices.getUserMedia({ audio: true, video: false })
                                  .then(function (audioStream) {
                                      stream.addTrack(audioStream.getAudioTracks()[0]);
                                      gsmCallback(null, stream);
                                  })
                              } else {
                                  gsmCallback(null, stream);
                              }
                          })
                          .catch(function(error) { pluginHandle.consentDialog(false); gsmCallback(error); });
                      };
                      if(Janus.webRTCAdapter.browserDetails.browser === 'chrome') {
                          var chromever = Janus.webRTCAdapter.browserDetails.version;
                          var maxver = 33;
                          if(window.navigator.userAgent.match('Linux'))
                              maxver = 35;	// "known" crash in chrome 34 and 35 on linux
                          if(chromever >= 26 && chromever <= maxver) {
                              // Chrome 26->33 requires some awkward chrome://flags manipulation
                              constraints = {
                                  video: {
                                      mandatory: {
                                          googLeakyBucket: true,
                                          maxWidth: window.screen.width,
                                          maxHeight: window.screen.height,
                                          minFrameRate: media.screenshareFrameRate,
                                          maxFrameRate: media.screenshareFrameRate,
                                          chromeMediaSource: 'screen'
                                      }
                                  },
                                  audio: isAudioSendEnabled(media)
                              };
                              getScreenMedia(constraints, callbackUserMedia);
                          } else {
                              // Chrome 34+ requires an extension
                              var pending = window.setTimeout(
                                  function () {
                                      error = new Error('NavigatorUserMediaError');
                                      error.name = 'The required Chrome extension is not installed: click <a href="#">here</a> to install it. (NOTE: this will need you to refresh the page)';
                                      pluginHandle.consentDialog(false);
                                      return callbacks.error(error);
                                  }, 1000);
                              cache[pending] = [callbackUserMedia, null];
                              window.postMessage({ type: 'janusGetScreen', id: pending }, '*');
                          }
                      } else if (window.navigator.userAgent.match('Firefox')) {
                          var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
                          if(ffver >= 33) {
                              // Firefox 33+ has experimental support for screen sharing
                              constraints = {
                                  video: {
                                      mozMediaSource: media.video,
                                      mediaSource: media.video
                                  },
                                  audio: isAudioSendEnabled(media)
                              };
                              getScreenMedia(constraints, function (err, stream) {
                                  callbackUserMedia(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 {
                              var error = new Error('NavigatorUserMediaError');
                              error.name = 'Your version of Firefox does not support screen sharing, please install Firefox 33 (or more recent versions)';
                              pluginHandle.consentDialog(false);
                              callbacks.error(error);
                              return;
                          }
                      }
  
                      // Wait for events from the Chrome Extension
                      window.addEventListener('message', function (event) {
                          if(event.origin != window.location.origin)
                              return;
                          if(event.data.type == 'janusGotScreen' && cache[event.data.id]) {
                              var data = cache[event.data.id];
                              var callback = data[0];
                              delete cache[event.data.id];
  
                              if (event.data.sourceId === '') {
                                  // user canceled
                                  var error = new Error('NavigatorUserMediaError');
                                  error.name = 'You cancelled the request for permission, giving up...';
                                  pluginHandle.consentDialog(false);
                                  callbacks.error(error);
                              } else {
                                  constraints = {
                                      audio: false,
                                      video: {
                                          mandatory: {
                                              chromeMediaSource: 'desktop',
                                              maxWidth: window.screen.width,
                                              maxHeight: window.screen.height,
                                              minFrameRate: media.screenshareFrameRate,
                                              maxFrameRate: media.screenshareFrameRate,
                                          },
                                          optional: [
                                              {googLeakyBucket: true},
                                              {googTemporalLayeredScreencast: true}
                                          ]
                                      }
                                  };
                                  constraints.video.mandatory.chromeMediaSourceId = event.data.sourceId;
                                  getScreenMedia(constraints, callback, isAudioSendEnabled(media));
                              }
                          } else if (event.data.type == 'janusGetScreenPending') {
                              window.clearTimeout(event.data.id);
                          }
                      });
                      return;
                  }
              }
              // If we got here, we're not screensharing
              if(media === null || media === undefined || media.video !== 'screen') {
                  // Check whether all media sources are actually available or not
                  navigator.mediaDevices.enumerateDevices().then(function(devices) {
                      var audioExist = devices.some(function(device) {
                              return device.kind === 'audioinput';
                          }),
                          videoExist = devices.some(function(device) {
                              return device.kind === 'videoinput';
                          });
  
                      // Check whether a missing device is really a problem
                      var audioSend = isAudioSendEnabled(media);
                      var videoSend = isVideoSendEnabled(media);
                      var needAudioDevice = isAudioSendRequired(media);
                      var needVideoDevice = isVideoSendRequired(media);
                      if(audioSend || videoSend || needAudioDevice || needVideoDevice) {
                          // We need to send either audio or video
                          var haveAudioDevice = audioSend ? audioExist : false;
                          var haveVideoDevice = videoSend ? videoExist : false;
                          if(!haveAudioDevice && !haveVideoDevice) {
                              // FIXME Should we really give up, or just assume recvonly for both?
                              pluginHandle.consentDialog(false);
                              callbacks.error('No capture device found');
                              return false;
                          } else if(!haveAudioDevice && needAudioDevice) {
                              pluginHandle.consentDialog(false);
                              callbacks.error('Audio capture is required, but no capture device found');
                              return false;
                          } else if(!haveVideoDevice && needVideoDevice) {
                              pluginHandle.consentDialog(false);
                              callbacks.error('Video capture is required, but no capture device found');
                              return false;
                          }
                      }
  
                      navigator.mediaDevices.getUserMedia({
                          audio: audioExist ? audioSupport : false,
                          video: videoExist ? videoSupport : false
                      })
                      .then(function(stream) { pluginHandle.consentDialog(false); streamsDone(handleId, jsep, media, callbacks, stream); })
                      .catch(function(error) { pluginHandle.consentDialog(false); callbacks.error({code: error.code, name: error.name, message: error.message}); });
                  })
                  .catch(function(error) {
                      pluginHandle.consentDialog(false);
                      callbacks.error('enumerateDevices error', error);
                  });
              }
          } else {
              // No need to do a getUserMedia, create offer/answer right away
              streamsDone(handleId, jsep, media, callbacks);
          }
      }
  
      function prepareWebrtcPeer(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : webrtcError;
          var jsep = callbacks.jsep;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          if(jsep !== undefined && jsep !== null) {
              if(config.pc === null) {
                  Janus.warn("Wait, no PeerConnection?? if this is an answer, use createAnswer and not handleRemoteJsep");
                  callbacks.error("No PeerConnection: if this is an answer, use createAnswer and not handleRemoteJsep");
                  return;
              }
              config.pc.setRemoteDescription(
                  new RTCSessionDescription(jsep),
                  function() {
                      Janus.log("Remote description accepted!");
                      callbacks.success();
                  }, callbacks.error);
          } else {
              callbacks.error("Invalid JSEP");
          }
      }
  
      function createOffer(handleId, media, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          var simulcast = callbacks.simulcast === true ? true : false;
          if(!simulcast) {
              Janus.log("Creating offer (iceDone=" + config.iceDone + ")");
          } else {
              Janus.log("Creating offer (iceDone=" + config.iceDone + ", simulcast=" + simulcast + ")");
          }
          // https://code.google.com/p/webrtc/issues/detail?id=3508
          var mediaConstraints = null;
          if(Janus.webRTCAdapter.browserDetails.browser == "firefox" || Janus.webRTCAdapter.browserDetails.browser == "edge") {
              mediaConstraints = {
                  'offerToReceiveAudio':isAudioRecvEnabled(media),
                  'offerToReceiveVideo':isVideoRecvEnabled(media)
              };
          } else {
              mediaConstraints = {
                  'mandatory': {
                      'OfferToReceiveAudio':isAudioRecvEnabled(media),
                      'OfferToReceiveVideo':isVideoRecvEnabled(media)
                  }
              };
          }
          Janus.debug(mediaConstraints);
          // Check if this is Firefox and we've been asked to do simulcasting
          var sendVideo = isVideoSendEnabled(media);
          if(sendVideo && simulcast && Janus.webRTCAdapter.browserDetails.browser === "firefox") {
              // FIXME Based on https://gist.github.com/voluntas/088bc3cc62094730647b
              Janus.log("Enabling Simulcasting for Firefox (RID)");
              var sender = config.pc.getSenders()[1];
              Janus.log(sender);
              var parameters = sender.getParameters();
              Janus.log(parameters);
              sender.setParameters({encodings: [
                  { rid: "high", active: true, priority: "high", maxBitrate: 1000000 },
                  { rid: "medium", active: true, priority: "medium", maxBitrate: 300000 },
                  { rid: "low", active: true, priority: "low", maxBitrate: 100000 }
              ]});
          }
          config.pc.createOffer(
              function(offer) {
                  Janus.debug(offer);
                  if(config.mySdp === null || config.mySdp === undefined) {
                      Janus.log("Setting local description");
                      if(sendVideo && simulcast) {
                          // This SDP munging only works with Chrome
                          if(Janus.webRTCAdapter.browserDetails.browser === "chrome") {
                              Janus.log("Enabling Simulcasting for Chrome (SDP munging)");
                              offer.sdp = mungeSdpForSimulcasting(offer.sdp);
                          } else if(Janus.webRTCAdapter.browserDetails.browser !== "firefox") {
                              Janus.warn("simulcast=true, but this is not Chrome nor Firefox, ignoring");
                          }
                      }
                      config.mySdp = offer.sdp;
                      config.pc.setLocalDescription(offer);
                  }
                  if(!config.iceDone && !config.trickle) {
                      // Don't do anything until we have all candidates
                      Janus.log("Waiting for all candidates...");
                      return;
                  }
                  if(config.sdpSent) {
                      Janus.log("Offer already sent, not sending it again");
                      return;
                  }
                  Janus.log("Offer ready");
                  Janus.debug(callbacks);
                  config.sdpSent = true;
                  // JSON.stringify doesn't work on some WebRTC objects anymore
                  // See https://code.google.com/p/chromium/issues/detail?id=467366
                  var jsep = {
                      "type": offer.type,
                      "sdp": offer.sdp
                  };
                  callbacks.success(jsep);
              }, callbacks.error, mediaConstraints);
      }
  
      function createAnswer(handleId, media, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              callbacks.error("Invalid handle");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          var simulcast = callbacks.simulcast === true ? true : false;
          if(!simulcast) {
              Janus.log("Creating answer (iceDone=" + config.iceDone + ")");
          } else {
              Janus.log("Creating answer (iceDone=" + config.iceDone + ", simulcast=" + simulcast + ")");
          }
          var mediaConstraints = null;
          if(Janus.webRTCAdapter.browserDetails.browser == "firefox" || Janus.webRTCAdapter.browserDetails.browser == "edge") {
              mediaConstraints = {
                  'offerToReceiveAudio':isAudioRecvEnabled(media),
                  'offerToReceiveVideo':isVideoRecvEnabled(media)
              };
          } else {
              mediaConstraints = {
                  'mandatory': {
                      'OfferToReceiveAudio':isAudioRecvEnabled(media),
                      'OfferToReceiveVideo':isVideoRecvEnabled(media)
                  }
              };
          }
          Janus.debug(mediaConstraints);
          // Check if this is Firefox and we've been asked to do simulcasting
          var sendVideo = isVideoSendEnabled(media);
          if(sendVideo && simulcast && Janus.webRTCAdapter.browserDetails.browser === "firefox") {
              // FIXME Based on https://gist.github.com/voluntas/088bc3cc62094730647b
              Janus.log("Enabling Simulcasting for Firefox (RID)");
              var sender = config.pc.getSenders()[1];
              Janus.log(sender);
              var parameters = sender.getParameters();
              Janus.log(parameters);
              sender.setParameters({encodings: [
                  { rid: "high", active: true, priority: "high", maxBitrate: 1000000 },
                  { rid: "medium", active: true, priority: "medium", maxBitrate: 300000 },
                  { rid: "low", active: true, priority: "low", maxBitrate: 100000 }
              ]});
          }
          config.pc.createAnswer(
              function(answer) {
                  Janus.debug(answer);
                  if(config.mySdp === null || config.mySdp === undefined) {
                      Janus.log("Setting local description");
                      if(sendVideo && simulcast) {
                          // This SDP munging only works with Chrome
                          if(Janus.webRTCAdapter.browserDetails.browser === "chrome") {
                              // FIXME Apparently trying to simulcast when answering breaks video in Chrome...
                              //~ Janus.log("Enabling Simulcasting for Chrome (SDP munging)");
                              //~ answer.sdp = mungeSdpForSimulcasting(answer.sdp);
                              Janus.warn("simulcast=true, but this is an answer, and video breaks in Chrome if we enable it");
                          } else if(Janus.webRTCAdapter.browserDetails.browser !== "firefox") {
                              Janus.warn("simulcast=true, but this is not Chrome nor Firefox, ignoring");
                          }
                      }
                      config.mySdp = answer.sdp;
                      config.pc.setLocalDescription(answer);
                  }
                  if(!config.iceDone && !config.trickle) {
                      // Don't do anything until we have all candidates
                      Janus.log("Waiting for all candidates...");
                      return;
                  }
                  if(config.sdpSent) {	// FIXME badly
                      Janus.log("Answer already sent, not sending it again");
                      return;
                  }
                  config.sdpSent = true;
                  // JSON.stringify doesn't work on some WebRTC objects anymore
                  // See https://code.google.com/p/chromium/issues/detail?id=467366
                  var jsep = {
                      "type": answer.type,
                      "sdp": answer.sdp
                  };
                  callbacks.success(jsep);
              }, callbacks.error, mediaConstraints);
      }
  
      function sendSDP(handleId, callbacks) {
          callbacks = callbacks || {};
          callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
          callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle, not sending anything");
              return;
          }
          var config = pluginHandle.webrtcStuff;
          Janus.log("Sending offer/answer SDP...");
          if(config.mySdp === null || config.mySdp === undefined) {
              Janus.warn("Local SDP instance is invalid, not sending anything...");
              return;
          }
          config.mySdp = {
              "type": config.pc.localDescription.type,
              "sdp": config.pc.localDescription.sdp
          };
          if(config.sdpSent) {
              Janus.log("Offer/Answer SDP already sent, not sending it again");
              return;
          }
          if(config.trickle === false)
              config.mySdp["trickle"] = false;
          Janus.debug(callbacks);
          config.sdpSent = true;
          callbacks.success(config.mySdp);
      }
  
      function getVolume(handleId) {
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              return 0;
          }
          var config = pluginHandle.webrtcStuff;
          // Start getting the volume, if getStats is supported
          if(config.pc.getStats && Janus.webRTCAdapter.browserDetails.browser == "chrome") {	// FIXME
              if(config.remoteStream === null || config.remoteStream === undefined) {
                  Janus.warn("Remote stream unavailable");
                  return 0;
              }
              // http://webrtc.googlecode.com/svn/trunk/samples/js/demos/html/constraints-and-stats.html
              if(config.volume.timer === null || config.volume.timer === undefined) {
                  Janus.log("Starting volume monitor");
                  config.volume.timer = setInterval(function() {
                      config.pc.getStats(function(stats) {
                          var results = stats.result();
                          for(var i=0; i<results.length; i++) {
                              var res = results[i];
                              if(res.type == 'ssrc' && res.stat('audioOutputLevel')) {
                                  config.volume.value = res.stat('audioOutputLevel');
                              }
                          }
                      });
                  }, 200);
                  return 0;	// We don't have a volume to return yet
              }
              return config.volume.value;
          } else {
              Janus.log("Getting the remote volume unsupported by browser");
              return 0;
          }
      }
  
      function isMuted(handleId, video) {
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              return true;
          }
          var config = pluginHandle.webrtcStuff;
          if(config.pc === null || config.pc === undefined) {
              Janus.warn("Invalid PeerConnection");
              return true;
          }
          if(config.myStream === undefined || config.myStream === null) {
              Janus.warn("Invalid local MediaStream");
              return true;
          }
          if(video) {
              // Check video track
              if(config.myStream.getVideoTracks() === null
                  || config.myStream.getVideoTracks() === undefined
                  || config.myStream.getVideoTracks().length === 0) {
                  Janus.warn("No video track");
                  return true;
              }
              return !config.myStream.getVideoTracks()[0].enabled;
          } else {
              // Check audio track
              if(config.myStream.getAudioTracks() === null
                  || config.myStream.getAudioTracks() === undefined
                  || config.myStream.getAudioTracks().length === 0) {
                  Janus.warn("No audio track");
                  return true;
              }
              return !config.myStream.getAudioTracks()[0].enabled;
          }
      }
  
      function mute(handleId, video, mute) {
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              return false;
          }
          var config = pluginHandle.webrtcStuff;
          if(config.pc === null || config.pc === undefined) {
              Janus.warn("Invalid PeerConnection");
              return false;
          }
          if(config.myStream === undefined || config.myStream === null) {
              Janus.warn("Invalid local MediaStream");
              return false;
          }
          if(video) {
              // Mute/unmute video track
              if(config.myStream.getVideoTracks() === null
                  || config.myStream.getVideoTracks() === undefined
                  || config.myStream.getVideoTracks().length === 0) {
                  Janus.warn("No video track");
                  return false;
              }
              config.myStream.getVideoTracks()[0].enabled = mute ? false : true;
              return true;
          } else {
              // Mute/unmute audio track
              if(config.myStream.getAudioTracks() === null
                  || config.myStream.getAudioTracks() === undefined
                  || config.myStream.getAudioTracks().length === 0) {
                  Janus.warn("No audio track");
                  return false;
              }
              config.myStream.getAudioTracks()[0].enabled = mute ? false : true;
              return true;
          }
      }
  
      function getBitrate(handleId) {
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined ||
              pluginHandle.webrtcStuff === null || pluginHandle.webrtcStuff === undefined) {
              Janus.warn("Invalid handle");
              return "Invalid handle";
          }
          var config = pluginHandle.webrtcStuff;
          if(config.pc === null || config.pc === undefined)
              return "Invalid PeerConnection";
          // Start getting the bitrate, if getStats is supported
          if(config.pc.getStats) {
              if(config.bitrate.timer === null || config.bitrate.timer === undefined) {
                  Janus.log("Starting bitrate timer (via getStats)");
                  config.bitrate.timer = setInterval(function() {
                      config.pc.getStats()
                      .then(function(stats) {
                          stats.forEach(function (res) {
                              if(!res)
                                  return;
                              var inStats = false;
                              // Check if these are statistics on incoming media
                              if((res.mediaType === "video" || res.id.toLowerCase().indexOf("video") > -1) &&
                                  res.type === "inbound-rtp" && res.id.indexOf("rtcp") < 0) {
                                  // New stats
                                  inStats = true;
                              } else if(res.type == 'ssrc' && res.bytesReceived &&
                                  (res.googCodecName === "VP8" || res.googCodecName === "")) {
                                  // Older Chromer versions
                                  inStats = true;
                              }
                              // Parse stats now
                              if(inStats) {
                                  config.bitrate.bsnow = res.bytesReceived;
                                  config.bitrate.tsnow = res.timestamp;
                                  if(config.bitrate.bsbefore === null || config.bitrate.tsbefore === null) {
                                      // Skip this round
                                      config.bitrate.bsbefore = config.bitrate.bsnow;
                                      config.bitrate.tsbefore = config.bitrate.tsnow;
                                  } else {
                                      // Calculate bitrate
                                      var timePassed = config.bitrate.tsnow - config.bitrate.tsbefore;
                                      if(Janus.webRTCAdapter.browserDetails.browser == "safari")
                                          timePassed = timePassed/1000;	// Apparently the timestamp is in microseconds, in Safari
                                      var bitRate = Math.round((config.bitrate.bsnow - config.bitrate.bsbefore) * 8 / timePassed);
                                      config.bitrate.value = bitRate + ' kbits/sec';
                                      //~ Janus.log("Estimated bitrate is " + config.bitrate.value);
                                      config.bitrate.bsbefore = config.bitrate.bsnow;
                                      config.bitrate.tsbefore = config.bitrate.tsnow;
                                  }
                              }
                          });
                      });
                  }, 1000);
                  return "0 kbits/sec";	// We don't have a bitrate value yet
              }
              return config.bitrate.value;
          } else {
              Janus.warn("Getting the video bitrate unsupported by browser");
              return "Feature unsupported by browser";
          }
      }
  
      function webrtcError(error) {
          Janus.error("WebRTC error:", error);
      }
  
      function cleanupWebrtc(handleId, hangupRequest) {
          Janus.log("Cleaning WebRTC stuff");
          var pluginHandle = pluginHandles[handleId];
          if(pluginHandle === null || pluginHandle === undefined) {
              // Nothing to clean
              return;
          }
          var config = pluginHandle.webrtcStuff;
          if(config !== null && config !== undefined) {
              if(hangupRequest === true) {
                  // Send a hangup request (we don't really care about the response)
                  var request = { "janus": "hangup", "transaction": Janus.randomString(12) };
                  if(token !== null && token !== undefined)
                      request["token"] = token;
                  if(apisecret !== null && apisecret !== undefined)
                      request["apisecret"] = apisecret;
                  Janus.debug("Sending hangup request (handle=" + handleId + "):");
                  Janus.debug(request);
                  if(websockets) {
                      request["session_id"] = sessionId;
                      request["handle_id"] = handleId;
                      ws.send(JSON.stringify(request));
                  } else {
                      Janus.httpAPICall(server + "/" + sessionId + "/" + handleId, {
                          verb: 'POST',
                          withCredentials: withCredentials,
                          data: request
                      });
                  }
              }
              // Cleanup stack
              config.remoteStream = null;
              if(config.volume.timer)
                  clearInterval(config.volume.timer);
              config.volume.value = null;
              if(config.bitrate.timer)
                  clearInterval(config.bitrate.timer);
              config.bitrate.timer = null;
              config.bitrate.bsnow = null;
              config.bitrate.bsbefore = null;
              config.bitrate.tsnow = null;
              config.bitrate.tsbefore = null;
              config.bitrate.value = null;
              try {
                  // Try a MediaStreamTrack.stop() for each track
                  if(!config.streamExternal && config.myStream !== null && config.myStream !== undefined) {
                      Janus.log("Stopping local stream tracks");
                      var tracks = config.myStream.getTracks();
                      for(var i in tracks) {
                          var mst = tracks[i];
                          Janus.log(mst);
                          if(mst !== null && mst !== undefined)
                              mst.stop();
                      }
                  }
              } catch(e) {
                  // Do nothing if this fails
              }
              config.streamExternal = false;
              config.myStream = null;
              // Close PeerConnection
              try {
                  config.pc.close();
              } catch(e) {
                  // Do nothing
              }
              config.pc = null;
              config.mySdp = null;
              config.iceDone = false;
              config.sdpSent = false;
              config.dataChannel = null;
              config.dtmfSender = null;
          }
          pluginHandle.oncleanup();
      }
  
      // Helper method to munge an SDP to enable simulcasting (Chrome only)
      function mungeSdpForSimulcasting(sdp) {
          // Let's munge the SDP to add the attributes for enabling simulcasting
          // (based on https://gist.github.com/ggarber/a19b4c33510028b9c657)
          var lines = sdp.split("\r\n");
          var video = false;
          var ssrc = [ -1 ], ssrc_fid = -1;
          var cname = null, msid = null, mslabel = null, label = null;
          var insertAt = -1;
          for(var i=0; i<lines.length; i++) {
              var mline = lines[i].match(/m=(\w+) */);
              if(mline) {
                  var medium = mline[1];
                  if(medium === "video") {
                      // New video m-line: make sure it's the first one
                      if(ssrc[0] < 0) {
                          video = true;
                      } else {
                          // We're done, let's add the new attributes here
                          insertAt = i;
                          break;
                      }
                  } else {
                      // New non-video m-line: do we have what we were looking for?
                      if(ssrc[0] > -1) {
                          // We're done, let's add the new attributes here
                          insertAt = i;
                          break;
                      }
                  }
                  continue;
              }
              if(!video)
                  continue;
              var fid = lines[i].match(/a=ssrc-group:FID (\d+) (\d+)/);
              if(fid) {
                  ssrc[0] = fid[1];
                  ssrc_fid = fid[2];
                  lines.splice(i, 1); i--;
                  continue;
              }
              if(ssrc[0]) {
                  var match = lines[i].match('a=ssrc:' + ssrc[0] + ' cname:(.+)')
                  if(match) {
                      cname = match[1];
                  }
                  match = lines[i].match('a=ssrc:' + ssrc[0] + ' msid:(.+)')
                  if(match) {
                      msid = match[1];
                  }
                  match = lines[i].match('a=ssrc:' + ssrc[0] + ' mslabel:(.+)')
                  if(match) {
                      mslabel = match[1];
                  }
                  match = lines[i].match('a=ssrc:' + ssrc + ' label:(.+)')
                  if(match) {
                      label = match[1];
                  }
                  if(lines[i].indexOf('a=ssrc:' + ssrc_fid) === 0) {
                      lines.splice(i, 1); i--;
                      continue;
                  }
                  if(lines[i].indexOf('a=ssrc:' + ssrc[0]) === 0) {
                      lines.splice(i, 1); i--;
                      continue;
                  }
              }
              if(lines[i].length == 0) {
                  lines.splice(i, 1); i--;
                  continue;
              }
          }
          if(ssrc[0] < 0) {
              // Couldn't find a FID attribute, let's just take the first video SSRC we find
              insertAt = -1;
              video = false;
              for(var i=0; i<lines.length; i++) {
                  var mline = lines[i].match(/m=(\w+) */);
                  if(mline) {
                      var medium = mline[1];
                      if(medium === "video") {
                          // New video m-line: make sure it's the first one
                          if(ssrc[0] < 0) {
                              video = true;
                          } else {
                              // We're done, let's add the new attributes here
                              insertAt = i;
                              break;
                          }
                      } else {
                          // New non-video m-line: do we have what we were looking for?
                          if(ssrc[0] > -1) {
                              // We're done, let's add the new attributes here
                              insertAt = i;
                              break;
                          }
                      }
                      continue;
                  }
                  if(!video)
                      continue;
                  if(ssrc[0] < 0) {
                      var value = lines[i].match(/a=ssrc:(\d+)/);
                      if(value) {
                          ssrc[0] = value[1];
                          lines.splice(i, 1); i--;
                          continue;
                      }
                  } else {
                      var match = lines[i].match('a=ssrc:' + ssrc[0] + ' cname:(.+)')
                      if(match) {
                          cname = match[1];
                      }
                      match = lines[i].match('a=ssrc:' + ssrc[0] + ' msid:(.+)')
                      if(match) {
                          msid = match[1];
                      }
                      match = lines[i].match('a=ssrc:' + ssrc[0] + ' mslabel:(.+)')
                      if(match) {
                          mslabel = match[1];
                      }
                      match = lines[i].match('a=ssrc:' + ssrc + ' label:(.+)')
                      if(match) {
                          label = match[1];
                      }
                      if(lines[i].indexOf('a=ssrc:' + ssrc_fid) === 0) {
                          lines.splice(i, 1); i--;
                          continue;
                      }
                      if(lines[i].indexOf('a=ssrc:' + ssrc[0]) === 0) {
                          lines.splice(i, 1); i--;
                          continue;
                      }
                  }
                  if(lines[i].length == 0) {
                      lines.splice(i, 1); i--;
                      continue;
                  }
              }
          }
          if(ssrc[0] < 0) {
              // Still nothing, let's just return the SDP we were asked to munge
              Janus.warn("Couldn't find the video SSRC, simulcasting NOT enabled");
              return sdp;
          }
          if(insertAt < 0) {
              // Append at the end
              insertAt = lines.length;
          }
          // Generate a couple of SSRCs
          ssrc[1] = Math.floor(Math.random()*0xFFFFFFFF);
          ssrc[2] = Math.floor(Math.random()*0xFFFFFFFF);
          // Add attributes to the SDP
          for(var i=0; i<ssrc.length; i++) {
              if(cname) {
                  lines.splice(insertAt, 0, 'a=ssrc:' + ssrc[i] + ' cname:' + cname);
                  insertAt++;
              }
              if(msid) {
                  lines.splice(insertAt, 0, 'a=ssrc:' + ssrc[i] + ' msid:' + msid);
                  insertAt++;
              }
              if(mslabel) {
                  lines.splice(insertAt, 0, 'a=ssrc:' + ssrc[i] + ' mslabel:' + msid);
                  insertAt++;
              }
              if(label) {
                  lines.splice(insertAt, 0, 'a=ssrc:' + ssrc[i] + ' label:' + msid);
                  insertAt++;
              }
          }
          lines.splice(insertAt, 0, 'a=ssrc-group:SIM ' + ssrc[0] + ' ' + ssrc[1] + ' ' + ssrc[2]);
          sdp = lines.join("\r\n");
          if(!sdp.endsWith("\r\n"))
              sdp += "\r\n";
          return sdp;
      }
  
      // Helper methods to parse a media object
      function isAudioSendEnabled(media) {
          Janus.debug("isAudioSendEnabled:", media);
          if(media === undefined || media === null)
              return true;	// Default
          if(media.audio === false)
              return false;	// Generic audio has precedence
          if(media.audioSend === undefined || media.audioSend === null)
              return true;	// Default
          return (media.audioSend === true);
      }
  
      function isAudioSendRequired(media) {
          Janus.debug("isAudioSendRequired:", media);
          if(media === undefined || media === null)
              return false;	// Default
          if(media.audio === false || media.audioSend === false)
              return false;	// If we're not asking to capture audio, it's not required
          if(media.failIfNoAudio === undefined || media.failIfNoAudio === null)
              return false;	// Default
          return (media.failIfNoAudio === true);
      }
  
      function isAudioRecvEnabled(media) {
          Janus.debug("isAudioRecvEnabled:", media);
          if(media === undefined || media === null)
              return true;	// Default
          if(media.audio === false)
              return false;	// Generic audio has precedence
          if(media.audioRecv === undefined || media.audioRecv === null)
              return true;	// Default
          return (media.audioRecv === true);
      }
  
      function isVideoSendEnabled(media) {
          Janus.debug("isVideoSendEnabled:", media);
          if(media === undefined || media === null)
              return true;	// Default
          if(media.video === false)
              return false;	// Generic video has precedence
          if(media.videoSend === undefined || media.videoSend === null)
              return true;	// Default
          return (media.videoSend === true);
      }
  
      function isVideoSendRequired(media) {
          Janus.debug("isVideoSendRequired:", media);
          if(media === undefined || media === null)
              return false;	// Default
          if(media.video === false || media.videoSend === false)
              return false;	// If we're not asking to capture video, it's not required
          if(media.failIfNoVideo === undefined || media.failIfNoVideo === null)
              return false;	// Default
          return (media.failIfNoVideo === true);
      }
  
      function isVideoRecvEnabled(media) {
          Janus.debug("isVideoRecvEnabled:", media);
          if(media === undefined || media === null)
              return true;	// Default
          if(media.video === false)
              return false;	// Generic video has precedence
          if(media.videoRecv === undefined || media.videoRecv === null)
              return true;	// Default
          return (media.videoRecv === true);
      }
  
      function isDataEnabled(media) {
          Janus.debug("isDataEnabled:", media);
          if(Janus.webRTCAdapter.browserDetails.browser == "edge") {
              Janus.warn("Edge doesn't support data channels yet");
              return false;
          }
          if(media === undefined || media === null)
              return false;	// Default
          return (media.data === true);
      }
  
      function isTrickleEnabled(trickle) {
          Janus.debug("isTrickleEnabled:", trickle);
          if(trickle === undefined || trickle === null)
              return true;	// Default is true
          return (trickle === true);
      }
  };
  
  module.exports = Janus;
  