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/// <reference lib="dom" />
import { servers } from "./index.ts"
import { log } from "./logger.ts"
import { Room } from "./room.ts"
import { TrackHandle } from "./track_handle.ts";
import { User } from "./user.ts"
export class RemoteUser extends User {
peer: RTCPeerConnection
negotiation_busy = false
constructor(room: Room, name: string) {
super(room, name)
this.peer = new RTCPeerConnection(servers)
this.peer.onicecandidate = ev => {
if (!ev.candidate) return
room.websocket_send({ ice_candiate: ev.candidate.toJSON(), receiver: this.name })
}
this.peer.ontrack = ev => {
const t = ev.track
log("media", "remote track", t)
this.add_track(new TrackHandle(t))
}
this.peer.onnegotiationneeded = async () => {
log("webrtc", "negotiation needed")
while (this.negotiation_busy) {
await new Promise<void>(r => setTimeout(() => r(), 100))
}
this.offer()
}
}
async offer() {
this.negotiation_busy = true
const offer_description = await this.peer.createOffer()
await this.peer.setLocalDescription(offer_description)
const offer = { type: offer_description.type, sdp: offer_description.sdp }
log("webrtc", "sent offer", { a: offer })
this.room.websocket_send({ receiver: this.name, offer })
}
async on_offer(offer: RTCSessionDescriptionInit) {
this.negotiation_busy = true
log("webrtc", "got offer", { a: offer })
const offer_description = new RTCSessionDescription(offer)
await this.peer.setRemoteDescription(offer_description)
this.answer()
}
async answer() {
const answer_description = await this.peer.createAnswer()
await this.peer.setLocalDescription(answer_description)
const answer = { type: answer_description.type, sdp: answer_description.sdp }
log("webrtc", "sent answer", { a: answer })
this.room.websocket_send({ receiver: this.name, answer })
this.negotiation_busy = false
}
async on_answer(answer: RTCSessionDescriptionInit) {
log("webrtc", "got answer", { a: answer })
const answer_description = new RTCSessionDescription(answer)
await this.peer.setRemoteDescription(answer_description)
this.negotiation_busy = false
}
add_ice_candidate(candidate: RTCIceCandidateInit) {
this.peer.addIceCandidate(new RTCIceCandidate(candidate))
}
leave() {
this.peer.close()
this.room.el.removeChild(this.el)
}
}
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