RTC.js

navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia;

var mediaOptions = {
  audio: true,
  video: {
    mandatory: {
      minWidth: 1280,
      minHeight: 720
    }
  }
};

$(function() {
 
    // data for current User 
    var currentUser = {
      name: name,
      id: guid(),
      stream: undefined
    };
    
    // get local user media stream
    navigator.getUserMedia(mediaOptions, function(stream) {
      currentUser.stream = stream;
      var video = $('#localVideo')[0];
      video.src = window.URL.createObjectURL(stream);

      start(); // start connection
    }, function() {});


    function start() {
      // initialize Pusher
      var pusher = new Pusher($('#chat').data().apiKey, {
        authEndpoint: '/pusher/auth',
        auth: {
          params: currentUser
        }
      });

      function gotRemoteVideo(userId, userName, stream) {
        var video = $("<video autoplay data-user-id='" + userId + "'/>");
        video[0].src = window.URL.createObjectURL(stream);
        $('#remoteVideos').append(video);

        var preview = $("<li data-user-id='" + userId + "'>");
        preview.append("<video autoplay/>");
        preview.append("<div class='name'>" + userName + "</div></li>")
        preview.find('video')[0].src = window.URL.createObjectURL(stream);

        $('#allVideos').append(preview);
      }

      function setupPeer(peerUserId, peerUserName, initiator) {
        var peer = new SimplePeer({ initiator: initiator, stream: currentUser.stream, trickle: false });

        peer.on('signal', function (data) {
          channel.trigger('client-signal-' + peerUserId, {
            userId: currentUser.id, userName: currentUser.name, data: data
          });
        });

        peer.on('stream', function(stream) { gotRemoteVideo(peerUserId, peerUserName, stream) });
        return peer;
      }

      function initiateConnection(peerUserId, peerUserName) {
        return setupPeer(peerUserId, peerUserName, true);
      };

      channel.bind('client-signal-' + currentUser.id, function(signal) {
        var peer = peers[signal.userId];

        if (peer === undefined) {
          peer = setupPeer(signal.userId, signal.userName, false);
        }

        peer.on('ready', function() {
          appendMessage(signal.userName, '<em>Connected</em>');
        });
        peer.signal(signal.data)
      });

      var speech = hark(currentUser.stream);

      speech.on('speaking', function() {
        for (var userId in peers) {
          var peer = peers[userId];
          peer.send('__SPEAKING__');
        }
      });
    }
  });
});