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firebaseRTC_client1.html
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<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<video id="myVideo" autoplay muted playsinline></video>
<video id="piVideo" autoplay muted playsinline></video>
<button onclick="connectToPi()" type="button">Call</button>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/7.1.0/firebase-app.js"></script>
<!-- TODO: Add SDKs for Firebase products that you want to use
https://firebase.google.com/docs/web/setup#available-libraries -->
<script src="https://www.gstatic.com/firebasejs/7.1.0/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.1.0/firebase-firestore.js"></script>
<script>
// Your web app's Firebase configuration
var firebaseConfig = {
apiKey: "AIzaSyC2AMehEW9xsxtLdVKHzZG7ENNh2wrBNw0",
authDomain: "mspi-a4b75.firebaseapp.com",
databaseURL: "https://mspi-a4b75.firebaseio.com",
projectId: "mspi-a4b75",
storageBucket: "mspi-a4b75.appspot.com",
messagingSenderId: "224698699586",
appId: "1:224698699586:web:33bb9a289a097f74a302db",
measurementId: "G-RBB4FBV72Q"
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
firebase.analytics();
var db = firebase.firestore();
var servers = {
iceServers: [
{
urls: "stun:stun.services.mozilla.com"
},
{
urls: "stun:stun.l.google.com:19302"
},
{
urls: "turn:numb.viagenie.ca",
credential: "charlietheunicorn",
username: "[email protected]"
}
]
};
var pc = new RTCPeerConnection(servers);
const dbCollection = "webrtctest";
var myVideo = document.getElementById("myVideo");
var piVideo = document.getElementById("piVideo");
var myId = "MyId";
var piId = "PiTest";
let hasLocalDesc = false;
let hasRemoteDesc = false;
pc.oniceconnectionstatechange = function() {
if(pc.iceConnectionState == 'disconnected') {
hasLocalDesc = false;
hasRemoteDesc = false;
console.log('Disconnected');
}
}
//Send local ice candidates
pc.onicecandidate = event =>
event.candidate
? sendMessage("iceCandidate", event.candidate)
: console.log("Sent All Ice");
//If WebRTC detects a stream added on other side, set video to that stream
pc.onaddstream = event => (piVideo.srcObject = event.stream);
function hasUserMedia() {
//check if the browser supports the WebRTC
return !!(
navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia
);
}
if (hasUserMedia()) {
navigator.getUserMedia =
navigator.getUserMedia ||
navigator.webkitGetUserMedia ||
navigator.mozGetUserMedia;
//enabling video and audio channels
navigator.getUserMedia(
{
video: true,
audio: true
},
function(stream) {
myVideo.srcObject = stream;
pc.addStream(stream);
},
function(err) {}
);
} else {
alert("WebRTC is not supported");
}
// //Query database collection
// db.collection(dbCollection).get().then((querySnapshot) => {
// querySnapshot.forEach((doc) => {
// console.log(`${doc.id} => ${doc.data()}`);
// });
// });
function sendMessage(type, data, options = {}) {
let d = JSON.stringify(data);
db.collection(dbCollection).add({
sender: myId,
what: type,
data: d,
options: options
});
}
async function connectToPi() {
if (!hasLocalDesc) {
await pc
.createOffer()
.then(offer => pc.setLocalDescription(offer))
.then(() => sendMessage("offer", pc.localDescription));
console.log("Sent offer:" + pc.localDescription);
hasLocalDesc = true;
}
}
function convertToRTCSessionDescriptionInit(data) {
let cache = {
type: data.type,
sdp: data.sdp
};
return cache;
}
function listenIce() {
db.collection(dbCollection)
.where("sender", "==", piId)
.onSnapshot(function(querySnapshot) {
querySnapshot.forEach(function(doc) {
let type = doc.data().what;
let data = JSON.parse(doc.data().data);
console.log(data);
if (type == "iceCandidate") {
//iceCandidates allow NAT Traversal so the PCs can find each other
pc.addIceCandidate(new RTCIceCandidate(data));
deleteRecord(doc.id);
console.log("Recieved Ice");
}
//console.log(`${doc.id} => ${doc.data().what}`);
});
});
}
function deleteRecord(id) {
//Delete signal so we don't process it again
db.collection(dbCollection)
.doc(id)
.delete()
.then(function() {
console.log("Document successfully deleted!");
})
.catch(function(error) {
console.error("Error removing document: ", error);
});
}
//Attaches listener to listen for signal from Raspberry Pi
//Runs function every time it detects a change
db.collection(dbCollection)
.where("sender", "==", piId)
.onSnapshot(function(querySnapshot) {
querySnapshot.forEach(function(doc) {
let type = doc.data().what;
let data = JSON.parse(doc.data().data);
//console.log(data);
if (type == "offer" && !hasLocalDesc && !hasRemoteDesc) {
data.type = type;
data = convertToRTCSessionDescriptionInit(data);
console.log(data);
//If recieving an offer, set it as remote "address" for WebRTC and send an answer
pc.setRemoteDescription(new RTCSessionDescription(data))
.then(() => pc.createAnswer())
//Set local "address" as the answer we just created
.then(answer => pc.setLocalDescription(answer))
.then(() => sendMessage("answer", pc.localDescription));
deleteRecord(doc.id);
hasLocalDesc = true;
hasRemoteDesc = true;
console.log("Recieved offer, sent answer");
listenIce();
} else if (type == "answer" && !hasRemoteDesc) {
data.type = type;
data = convertToRTCSessionDescriptionInit(data);
//If recieving an answer, set it as remote "address" for WebRTC
pc.setRemoteDescription(new RTCSessionDescription(data));
deleteRecord(doc.id);
hasRemoteDesc = true;
console.log("Recieved answer");
listenIce();
}
//console.log(`${doc.id} => ${doc.data().what}`);
});
});
</script>
</body>
</html>