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import { WebSocket } from "@fosscord/gateway";
import { Payload } from "./index";
import { VoiceOPCodes } from "@fosscord/util";
import { Server } from "../Server";
import * as mediasoup from "mediasoup";
import { RtpCodecCapability } from "mediasoup/node/lib/RtpParameters";
import * as sdpTransform from 'sdp-transform';
/*
{
op: 1,
d: {
protocol: "webrtc",
data: "
a=extmap-allow-mixed
a=ice-ufrag:ilWh
a=ice-pwd:Mx7TDnPKXDnTgYWC+qMaqspQ
a=ice-options:trickle
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=extmap:2 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:3 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:mid
a=rtpmap:111 opus/48000/2
a=extmap:14 urn:ietf:params:rtp-hdrext:toffset
a=extmap:13 urn:3gpp:video-orientation
a=extmap:5 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type
a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-timing
a=extmap:8 http://www.webrtc.org/experiments/rtp-hdrext/color-space
a=extmap:10 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
a=extmap:11 urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id
a=rtpmap:96 VP8/90000
a=rtpmap:97 rtx/90000
",
sdp: "same data as in d.data? also not documented by discord",
codecs: [
{
name: "opus",
type: "audio",
priority: 1000,
payload_type: 111,
rtx_payload_type: null,
},
{
name: "H264",
type: "video",
priority: 1000,
payload_type: 102,
rtx_payload_type: 121,
},
{
name: "VP8",
type: "video",
priority: 2000,
payload_type: 96,
rtx_payload_type: 97,
},
{
name: "VP9",
type: "video",
priority: 3000,
payload_type: 98,
rtx_payload_type: 99,
},
],
rtc_connection_id: "b3c8628a-edb5-49ae-b860-ab0d2842b104",
},
}
*/
export async function onSelectProtocol(this: Server, socket: WebSocket, data: Payload) {
const rtpCapabilities = this.mediasoupRouters[0].rtpCapabilities;
const codecs = rtpCapabilities.codecs as RtpCodecCapability[];
const transport = this.mediasoupTransports[0]; //whatever
const res = sdpTransform.parse(data.d.sdp);
/*
res.media.map(x => x.rtp).flat(1).map(x => ({
codec: x.codec,
payloadType: x.payload,
clockRate: x.rate as number,
mimeType: `audio/${x.codec}`,
})),
*/
const producer = await transport.produce({
kind: "audio",
rtpParameters: {
mid: "audio",
codecs: [{
clockRate: 48000,
payloadType: 111,
mimeType: "audio/opus",
channels: 2,
}],
headerExtensions: res.ext?.map(x => ({
id: x.value,
uri: x.uri,
}))
},
paused: false,
});
socket.send(JSON.stringify({
op: VoiceOPCodes.SESSION_DESCRIPTION,
d: {
video_codec: data.d.codecs.find((x: any) => x.type === "video").name,
secret_key: new Array(32).fill(null).map(x => Math.random() * 256),
mode: "xsalsa20_poly1305",
media_session_id: this.mediasoupTransports[0].id,
audio_codec: data.d.codecs.find((x: any) => x.type === "audio").name,
}
}));
}
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