1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/// <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, id: number, name: string) {
super(room, id, name)
log("usermodel", `added remote user: ${id} ${JSON.stringify(name)}`)
this.peer = new RTCPeerConnection(servers)
this.peer.onicecandidate = ev => {
if (!ev.candidate) return
room.websocket_send({ relay: { recipient: this.id, message: { ice_candidate: ev.candidate.toJSON() } } })
}
this.peer.ontrack = ev => {
const t = ev.track
log("media", `remote track: ${this.name}`, t)
this.add_track(new TrackHandle(t))
}
this.peer.onnegotiationneeded = async () => {
log("webrtc", `negotiation needed: ${this.name}`)
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: ${this.name}`, { a: offer })
this.room.websocket_send({ relay: { recipient: this.id, message: { offer } } })
}
async on_offer(offer: RTCSessionDescriptionInit) {
this.negotiation_busy = true
log("webrtc", `got offer: ${this.name}`, { 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: ${this.name}`, { a: answer })
this.room.websocket_send({ relay: { recipient: this.id, message: { answer } } })
this.negotiation_busy = false
}
async on_answer(answer: RTCSessionDescriptionInit) {
log("webrtc", `got answer: ${this.name}`, { 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() {
log("usermodel", `remove remote user: ${this.name}`)
this.peer.close()
this.room.el.removeChild(this.el)
}
}
|
