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