71 lines
2.4 KiB
JavaScript
Executable File
71 lines
2.4 KiB
JavaScript
Executable File
import Interop from '@jitsi/sdp-interop';
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import transform from 'sdp-transform';
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import logger from '/imports/startup/client/logger';
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// sdp-interop library for unified-plan <-> plan-b translation
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const interop = new Interop.Interop();
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// Some heuristics to determine if the input SDP is Unified Plan
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const isUnifiedPlan = (sdp) => {
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const parsedSDP = transform.parse(sdp);
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if (parsedSDP.media.length <= 3 && parsedSDP.media.every(m => ['video', 'audio', 'data'].indexOf(m.mid) !== -1)) {
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logger.info({ logCode: 'sdp_utils_not_unified_plan' }, 'SDP does not look like Unified Plan');
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return false;
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}
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logger.info({ logCode: 'sdp_utils_is_unified_plan' }, 'SDP looks like Unified Plan');
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return true;
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};
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// Some heuristics to determine if the input SDP is Plan B
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const isPlanB = (sdp) => {
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const parsedSDP = transform.parse(sdp);
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if (parsedSDP.media.length > 3 || !parsedSDP.media.every(m => ['video', 'audio', 'data'].indexOf(m.mid) !== -1)) {
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logger.info({ logCode: 'sdp_utils_not_plan_b' }, 'SDP does not look like Plan B');
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return false;
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}
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logger.info({ logCode: 'sdp_utils_is_plan_b' }, 'SDP looks like Plan B');
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return true;
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};
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// Specific method for translating FS SDPs from Plan B to Unified Plan (vice-versa)
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const toPlanB = (unifiedPlanSDP) => {
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const planBSDP = interop.toPlanB(unifiedPlanSDP);
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logger.info({ logCode: 'sdp_utils_unified_plan_to_plan_b' }, `Converted Unified Plan to Plan B ${JSON.stringify(planBSDP)}`);
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return planBSDP;
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};
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const toUnifiedPlan = (planBSDP) => {
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const unifiedPlanSDP = interop.toUnifiedPlan(planBSDP);
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logger.info({ logCode: 'sdp_utils_plan_b_to_unified_plan' }, `Converted Plan B to Unified Plan ${JSON.stringify(unifiedPlanSDP)}`);
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return unifiedPlanSDP;
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};
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const stripMDnsCandidates = (sdp) => {
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const parsedSDP = transform.parse(sdp);
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let strippedCandidates = 0;
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parsedSDP.media.forEach((media) => {
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if (media.candidates) {
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media.candidates = media.candidates.filter((candidate) => {
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if (candidate.ip && candidate.ip.indexOf('.local') === -1) {
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return true;
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}
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strippedCandidates += 1;
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return false;
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});
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}
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});
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if (strippedCandidates > 0) {
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logger.info({ logCode: 'sdp_utils_mdns_candidate_strip' }, `Stripped ${strippedCandidates} mDNS candidates`);
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}
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return transform.write(parsedSDP);
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};
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export {
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interop, isUnifiedPlan, toPlanB, toUnifiedPlan, stripMDnsCandidates,
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};
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