ghostream/web/static/js/viewer.js

98 lines
3.5 KiB
JavaScript

let peerConnection
let streamPath = window.location.href
startPeerConnection = () => {
// Init peer connection
peerConnection = new RTCPeerConnection({
iceServers: [{ urls: stunServers }]
})
// On connection change, change indicator color
// if connection failed, restart peer connection
peerConnection.oniceconnectionstatechange = e => {
console.log("ICE connection state changed, " + peerConnection.iceConnectionState)
switch (peerConnection.iceConnectionState) {
case "disconnected":
document.getElementById("connectionIndicator").style.fill = "#dc3545"
break
case "checking":
document.getElementById("connectionIndicator").style.fill = "#ffc107"
break
case "connected":
document.getElementById("connectionIndicator").style.fill = "#28a745"
break
case "closed":
case "failed":
console.log("Connection failed, restarting...")
peerConnection.close()
peerConnection = null
setTimeout(startPeerConnection, 1000)
break
}
}
// We want to receive audio and video
peerConnection.addTransceiver('video', { 'direction': 'sendrecv' })
peerConnection.addTransceiver('audio', { 'direction': 'sendrecv' })
// Create offer and set local description
peerConnection.createOffer().then(offer => {
// After setLocalDescription, the browser will fire onicecandidate events
peerConnection.setLocalDescription(offer)
}).catch(console.log)
// When candidate is null, ICE layer has run out of potential configurations to suggest
// so let's send the offer to the server
peerConnection.onicecandidate = event => {
if (event.candidate === null) {
// Send offer to server
// The server know the stream name from the url
// The server replies with its description
// After setRemoteDescription, the browser will fire ontrack events
console.log("Sending session description to server")
fetch(streamPath, {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify(peerConnection.localDescription)
})
.then(response => response.json())
.then((data) => peerConnection.setRemoteDescription(new RTCSessionDescription(data)))
.catch(console.log)
}
}
// When video track is received, configure player
peerConnection.ontrack = function (event) {
console.log(`New ${event.track.kind} track`)
if (event.track.kind === "video") {
const viewer = document.getElementById('viewer')
viewer.srcObject = event.streams[0]
}
}
}
// Register keyboard events
let viewer = document.getElementById("viewer")
window.addEventListener("keydown", (event) => {
switch (event.key) {
case 'f':
// F key put player in fullscreen
if (document.fullscreenElement !== null) {
document.exitFullscreen()
} else {
viewer.requestFullscreen()
}
break
case 'm':
case ' ':
// M and space key mute player
viewer.muted = !viewer.muted
event.preventDefault()
viewer.play()
break
}
})