mediasoup-client
Version:
mediasoup client side TypeScript library
71 lines (70 loc) • 2.58 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getCapabilities = getCapabilities;
exports.mangleRtpParameters = mangleRtpParameters;
const utils = require("../../utils");
/**
* Normalize ORTC based Edge's RTCRtpReceiver.getCapabilities() to produce a full
* compliant ORTC RTCRtpCapabilities.
*/
function getCapabilities() {
const nativeCaps = RTCRtpReceiver.getCapabilities();
const caps = utils.clone(nativeCaps);
for (const codec of caps.codecs ?? []) {
// Rename numChannels to channels.
// @ts-expect-error --- On purpose.
codec.channels = codec.numChannels;
// @ts-expect-error --- On purpose.
delete codec.numChannels;
// Add mimeType.
// @ts-expect-error --- On purpose (due to codec.name).
codec.mimeType = codec.mimeType ?? `${codec.kind}/${codec.name}`;
// NOTE: Edge sets some numeric parameters as string rather than number. Fix them.
if (codec.parameters) {
const parameters = codec.parameters;
if (parameters.apt) {
parameters.apt = Number(parameters.apt);
}
if (parameters['packetization-mode']) {
parameters['packetization-mode'] = Number(parameters['packetization-mode']);
}
}
// Delete emty parameter String in rtcpFeedback.
for (const feedback of codec.rtcpFeedback ?? []) {
if (!feedback.parameter) {
feedback.parameter = '';
}
}
}
return caps;
}
/**
* Generate RTCRtpParameters as ORTC based Edge likes.
*/
function mangleRtpParameters(rtpParameters) {
const params = utils.clone(rtpParameters);
// Rename mid to muxId.
if (params.mid) {
// @ts-expect-error --- On purpose (due to muxId).
params.muxId = params.mid;
delete params.mid;
}
for (const codec of params.codecs) {
// Rename channels to numChannels.
if (codec.channels) {
// @ts-expect-error --- On purpose.
codec.numChannels = codec.channels;
delete codec.channels;
}
// Add codec.name (requried by Edge).
// @ts-expect-error --- On purpose (due to name).
if (codec.mimeType && !codec.name) {
// @ts-expect-error --- On purpose (due to name).
codec.name = codec.mimeType.split('/')[1];
}
// Remove mimeType.
// @ts-expect-error --- Removing mandatory field.
delete codec.mimeType;
}
return params;
}