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webrtc: support reading and publishing multichannel Opus (#3371) (#3375)

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Alessandro Ros 2024-06-03 00:26:32 +02:00 • committed by GitHub
parent c37e8953fa
commit ca1638976b
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6 changed files with 348 additions and 13 deletions
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40
internal/servers/webrtc/read_index.html
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@ -122,6 +122,42 @@ const enableStereoPcmau = (section) => {
return lines.join('\r\n');
};
const enableMultichannelOpus = (section) => {
let lines = section.split('\r\n');
lines[0] += " 112";
lines.splice(lines.length - 1, 0, "a=rtpmap:112 multiopus/48000/3");
lines.splice(lines.length - 1, 0, "a=fmtp:112 channel_mapping=0,2,1;num_streams=2;coupled_streams=1");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:112 transport-cc");
lines[0] += " 113";
lines.splice(lines.length - 1, 0, "a=rtpmap:113 multiopus/48000/4");
lines.splice(lines.length - 1, 0, "a=fmtp:113 channel_mapping=0,1,2,3;num_streams=2;coupled_streams=2");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:113 transport-cc");
lines[0] += " 114";
lines.splice(lines.length - 1, 0, "a=rtpmap:114 multiopus/48000/5");
lines.splice(lines.length - 1, 0, "a=fmtp:114 channel_mapping=0,4,1,2,3;num_streams=3;coupled_streams=2");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:114 transport-cc");
lines[0] += " 115";
lines.splice(lines.length - 1, 0, "a=rtpmap:115 multiopus/48000/6");
lines.splice(lines.length - 1, 0, "a=fmtp:115 channel_mapping=0,4,1,2,3,5;num_streams=4;coupled_streams=2");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:115 transport-cc");
lines[0] += " 116";
lines.splice(lines.length - 1, 0, "a=rtpmap:116 multiopus/48000/7");
lines.splice(lines.length - 1, 0, "a=fmtp:116 channel_mapping=0,4,1,2,3,5,6;num_streams=4;coupled_streams=4");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:116 transport-cc");
lines[0] += " 117";
lines.splice(lines.length - 1, 0, "a=rtpmap:117 multiopus/48000/8");
lines.splice(lines.length - 1, 0, "a=fmtp:117 channel_mapping=0,6,1,4,5,2,3,7;num_streams=5;coupled_streams=4");
lines.splice(lines.length - 1, 0, "a=rtcp-fb:117 transport-cc");
return lines.join('\r\n');
};
const enableStereoOpus = (section) => {
let opusPayloadFormat = '';
let lines = section.split('\r\n');
@ -162,6 +198,10 @@ const editOffer = (sdp) => {
sections[i] = enableStereoPcmau(sections[i]);
}
if (nonAdvertisedCodecs.includes('multiopus/48000/6')) {
sections[i] = enableMultichannelOpus(sections[i]);
}
break;
}
}