camera/templates/index.html

@@ -205,45 +205,25 @@ form label {
 
       function sendJson(data) {
         const toSend = JSON.stringify(data);
-        const dcReady = dc && dc.readyState == "open";
-        const method = dcReady ? "dataConnection" : "webSocket";
-        log("Sending message via " + method + "...");
+        log("Sending message...");
         logPre(toSend);
-        (dcReady ? dc : webSocket).send(toSend);
+        webSocket.send(toSend);
       }
 
       var pc = undefined;
-      var dc = undefined;
-
-      function sendOffer() {
-        if (pc.iceGatheringState == "complete") {
-          sendJson({
-            description: pc.localDescription
-          });
-        }
-      }
-
       function createRTCPeerConnection() {
         const pc = new RTCPeerConnection();
         log("Created RTCPeerConnection.");
 
-        pc.onsignalingstatechange = e => {
-          log("pc.onsignalingstatechange: " + pc.signalingState);
-        }
-        pc.oniceconnectionstatechange = e => {
-          log("pc.oniceconnectionstatechange: " + pc.iceConnectionState);
-        }
-        pc.onicegatheringstatechange = async function(e) {
-          log("pc.onicegatheringstatechange: " + pc.iceGatheringState);
-          sendOffer();
-        }
+        pc.onicecandidate = ({candidate}) => sendJson({candidate});
 
         // let the "negotiationneeded" event trigger offer generation
-        //  ... but only once icegathering is complete.
         pc.onnegotiationneeded = async function () {
           log("In pc.onnegotiationneeded...");
           await pc.setLocalDescription(await pc.createOffer());
-          sendOffer();
+          sendJson({
+            description: pc.localDescription
+          });
         }
 
         pc.ontrack = ({streams: [stream]}) => {
@@ -262,33 +242,11 @@ form label {
           }
         };
 
-        pc.ondatachannel = e => {
-          dc = e.channel;
-          dc.onmessage = e => {
-            receiveMessage({source: "dataChannel", data: e.data});
-          }
-          log('Data channel initialized.');
-        }
-
-        if (isHost) {
-          dc = pc.createDataChannel('data');
-          dc.onmessage = e => {
-            receiveMessage({source: "dataChannel", data: e.data});
-          }
-          dc.onopen = e => {
-            log("Data channel open, sending settings...")
-            settings = readSettingsForm(true);
-            sendJson({settings});
-            startStreamingWithErorrHandling(false);
-          }
-        }
-
         return pc;
       }
 
       // get a local stream, show it in a self-view and add it to be sent
       async function startStreaming(fromButton) {
-        log('In startStreaming(fromButton=' + fromButton + ')...');
         const otherAudioSettings = isHost
           ? settings['client-audio']
           : settings['host-audio'];
@@ -311,6 +269,15 @@ form label {
         }
         start.style.display = 'none';
 
+        if (isHost) {
+          sendJson({
+            settings: settings
+          });
+        }
+
+        if (pc !== undefined) return;
+        pc = createRTCPeerConnection();
+
         const videoConstraints = videoSettings == 'none'
           ? false
           : videoSettings == 'true'
@@ -354,23 +321,27 @@ form label {
 
       async function receiveMessage(e) {
         qrcode.style.display = 'none';
-        log("In receiveMessage from " + e.source + "...");
+        log("In webSocket.onmessage...");
         logPre(e.data);
         const data = JSON.parse(e.data);
-        if (data.ready) {
-          // Ready message means client is open and ready for connection.
-          pc = createRTCPeerConnection();
+        if (data.requestSettings) {
+          settings = readSettingsForm(true);
+          startStreamingWithErorrHandling(false);
         } else if (data.settings) {
           settings = data.settings;
           startStreamingWithErorrHandling(false);
         } else if (data.description) {
-          if (pc == undefined) pc = createRTCPeerConnection();
           await pc.setRemoteDescription(data.description);
           if (data.description.type == "offer") {
             log("Got an offer...");
             await pc.setLocalDescription(await pc.createAnswer());
-            sendOffer();
+            sendJson({
+              description: pc.localDescription
+            });
           }
+        } else if (data.candidate) {
+          log("Adding ice candidate...");
+          await pc.addIceCandidate(data.candidate);
         }
       };
 
@@ -391,9 +362,7 @@ form label {
           log('WebSocket error: ' + e);
         };
 
-        webSocket.onmessage = e => {
-          receiveMessage({source: "webSocket", data: e.data});
-        }
+        webSocket.onmessage = receiveMessage;
 
         return webSocket;
       }
@@ -401,10 +370,7 @@ form label {
       webSocket = createWebSocket();
 
       if (!isHost) {
-        // To make serverless and server mode more similar,
-        //  always make the first RTCPeerConnection offer from the host,
-        //  so here just notify the host to start the process.
-        webSocket.onopen = _ => sendJson({ready: true});
+        webSocket.onopen = _ => sendJson({requestSettings: true});
       }
 
       log("Finished <script> block.");