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public offerListener() { | |
this.socket.offerListen() | |
.pipe(takeWhile(() => this.alive)) | |
.subscribe(async (data) => { | |
// receive user id and peer offer | |
let id: string = data.id; | |
let offer: RTCSessionDescription = data.offer; | |
if (!this.peerConnections[id] || this.peerConnections[id] == null) { | |
this.peerConnections[id] = new RTCPeerConnection(this.connectionConfig); | |
} | |
this.peerConnections[id] | |
.setRemoteDescription(offer) | |
.then(() => { | |
// get current user media stream | |
return this.getUserMediaCommonFunctionCall(id, 2); | |
}) | |
.then((stream: MediaStream) => { | |
this.userVideo.srcObject = stream; | |
}) | |
.then(() => { | |
// create answer | |
if (!this.peerConnections[id].localDescription || this.peerConnections[id].localDescription == null) { | |
return this.peerConnections[id].createAnswer(); | |
} | |
throw "answer created already"; | |
}) | |
.then((answer: RTCSessionDescriptionInit) => { | |
return this.peerConnections[id].setLocalDescription(answer); | |
}) | |
.then(() => { | |
//send back answer to the requester peer | |
this.socket.sendAnswer(id, this.peerConnections[id].localDescription); | |
}) | |
.catch((err) => { | |
console.error('err=>', err); | |
}); | |
this.peerConnections[id].ontrack = (event: RTCTrackEvent) => { | |
if (otherVidElement) { | |
// add stream from requester | |
if (!otherVidElement.srcObject) { | |
otherVidElement.srcObject = event.streams[0]; | |
} | |
// event listener to check if stream has ended | |
event.track.onended = (event: Event) => { | |
console.log('track ended!'); | |
otherVidElement.srcObject = otherVidElement.srcObject; | |
} | |
} | |
}; | |
}, (err) => { | |
console.log('err=>', err); | |
}) | |
} |
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