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@inscapist
Forked from alexciarlillo/rtcloopbackhack.js
Created August 30, 2021 11:06
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let rtcConnection = null;
let rtcLoopbackConnection = null;
let loopbackStream = new MediaStream(); // this is the stream you will read from for actual audio output
const offerOptions = {
offerVideo: true,
offerAudio: true,
offerToReceiveAudio: false,
offerToReceiveVideo: false,
};
let offer, answer;
// initialize the RTC connections
this.rtcConnection = new RTCPeerConnection();
this.rtcLoopbackConnection = new RTCPeerConnection();
this.rtcConnection.onicecandidate = e =>
e.candidate && this.rtcLoopbackConnection.addIceCandidate(new RTCIceCandidate(e.candidate));
this.rtcLoopbackConnection.onicecandidate = e =>
e.candidate && this.rtcConnection.addIceCandidate(new RTCIceCandidate(e.candidate));
this.rtcLoopbackConnection.ontrack = e =>
e.streams[0].getTracks().forEach(track => this.loopbackStream.addTrack(track));
// setup the loopback
this.rtcConnection.addStream(stream); // this stream would be the processed stream coming out of Web Audio API destination node
offer = await this.rtcConnection.createOffer(offerOptions);
await this.rtcConnection.setLocalDescription(offer);
await this.rtcLoopbackConnection.setRemoteDescription(offer);
answer = await this.rtcLoopbackConnection.createAnswer();
await this.rtcLoopbackConnection.setLocalDescription(answer);
await this.rtcConnection.setRemoteDescription(answer);
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