How to use swapRidAndMidExtensionsInSimulcastAnswer method in wpt

Best JavaScript code snippet using wpt

simulcast.js

Source:simulcast.js

...38        'a=msid:rid-' + rid + ' rid-' + rid + '\r\n';39  });40  return sdp;41}42function swapRidAndMidExtensionsInSimulcastAnswer(answer, localDescription, rids) {43  const sections = SDPUtils.splitSections(answer.sdp);44  const dtls = SDPUtils.getDtlsParameters(sections[1], sections[0]);45  const ice = SDPUtils.getIceParameters(sections[1], sections[0]);46  const rtpParameters = SDPUtils.parseRtpParameters(sections[1]);47  rtpParameters.headerExtensions = rtpParameters.headerExtensions.filter(ext => {48    return !extensionsToFilter.includes(ext.uri);49  });50  const localMid = SDPUtils.getMid(SDPUtils.splitSections(localDescription.sdp)[1]);51  let sdp = SDPUtils.writeSessionBoilerplate() +52    SDPUtils.writeDtlsParameters(dtls, 'active') +53    SDPUtils.writeIceParameters(ice) +54    'a=group:BUNDLE ' + localMid + '\r\n';55  sdp += SDPUtils.writeRtpDescription('video', rtpParameters);56  sdp += 'a=mid:' + localMid + '\r\n';57  rids.forEach(rid => {58    sdp += 'a=rid:' + rid + ' recv\r\n';59  });60  sdp += 'a=simulcast:recv ' + rids.join(';') + '\r\n';61  // Re-add headerextensions we filtered.62  const headerExtensions = SDPUtils.parseRtpParameters(SDPUtils.splitSections(localDescription.sdp)[1]).headerExtensions;63  headerExtensions.forEach(ext => {64    if (extensionsToFilter.includes(ext.uri)) {65      sdp += 'a=extmap:' + ext.id + ' ' + ext.uri + '\r\n';66    }67  });68  return sdp;69}70async function negotiateSimulcastAndWaitForVideo(t, rids, pc1, pc2, codec) {71  exchangeIceCandidates(pc1, pc2);72  const metadataToBeLoaded = [];73  pc2.ontrack = (e) => {74    const stream = e.streams[0];75    const v = document.createElement('video');76    v.autoplay = true;77    v.srcObject = stream;78    v.id = stream.id79    metadataToBeLoaded.push(new Promise((resolve) => {80        v.addEventListener('loadedmetadata', () => {81            resolve();82        });83    }));84  };85  const sendEncodings = rids.map(rid => ({rid}));86  // Use a 2X downscale factor between each layer. To improve ramp-up time, the87  // top layer is scaled down by a factor 2. Smaller layer comes first. For88  // example if MediaStreamTrack is 720p and we want to send three layers we'll89  // get {90p, 180p, 360p}.90  let scaleResolutionDownBy = 2;91  for (let i = sendEncodings.length - 1; i >= 0; --i) {92    sendEncodings[i].scaleResolutionDownBy = scaleResolutionDownBy;93    scaleResolutionDownBy *= 2;94  }95  // Use getUserMedia as getNoiseStream does not have enough entropy to ramp-up.96  await setMediaPermission();97  const stream = await navigator.mediaDevices.getUserMedia({video: {width: 1280, height: 720}});98  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));99  const transceiver = pc1.addTransceiver(stream.getVideoTracks()[0], {100    streams: [stream],101    sendEncodings: sendEncodings,102  });103  if (codec) {104    preferCodec(transceiver, codec.mimeType, codec.sdpFmtpLine);105  }106  const offer = await pc1.createOffer();107  await pc1.setLocalDescription(offer),108  await pc2.setRemoteDescription({109    type: 'offer',110    sdp: swapRidAndMidExtensionsInSimulcastOffer(offer, rids),111  });112  const answer = await pc2.createAnswer();113  await pc2.setLocalDescription(answer);114  await pc1.setRemoteDescription({115    type: 'answer',116    sdp: swapRidAndMidExtensionsInSimulcastAnswer(answer, pc1.localDescription, rids),117  });118  assert_equals(metadataToBeLoaded.length, rids.length);119  return Promise.all(metadataToBeLoaded);...

Using AI Code Generation

1var pc = new RTCPeerConnection();2pc.onnegotiationneeded = function () {3  pc.createOffer().then(function (offer) {4    return pc.setLocalDescription(offer);5  }).then(function () {6    return pc.setRemoteDescription({7      sdp: pc.localDescription.sdp.replace('a=mid:video\r8    });9  }).then(function () {10    return pc.createAnswer();11  }).then(function (answer) {12    return pc.setLocalDescription(answer);13  }).then(function () {14    return pc.setRemoteDescription({15      sdp: pc.localDescription.sdp.replace('a=mid:video\r16    });17  }).catch(function (e) {18    console.error(e);19  });20};21pc.ontrack = function (evt) {22  console.log('ontrack', evt);23};24pc.addTransceiver('video', {direction: 'sendrecv'});25pc.createDataChannel('test');26pc.createOffer().then(function (offer) {27  return pc.setLocalDescription(offer);28}).then(function () {29  return pc.setRemoteDescription({30    sdp: pc.localDescription.sdp.replace('a=mid:video\r31  });32}).then(function () {33  return pc.createAnswer();34}).then(function (answer) {35  return pc.setLocalDescription(answer);36}).then(function () {37  return pc.setRemoteDescription({38    sdp: pc.localDescription.sdp.replace('a=mid:video\r39  });40}).catch(function (e) {41  console.error(e);42});

Using AI Code Generation

1async function test() {2  const pc = new RTCPeerConnection();3  const offer = await pc.createOffer();4  await pc.setLocalDescription(offer);5  const localDescription = pc.localDescription;6  const pc2 = new RTCPeerConnection();7  await pc2.setRemoteDescription(localDescription);8  const answer = await pc2.createAnswer();9  await pc2.setLocalDescription(answer);10  const localDescription2 = pc2.localDescription;11  await pc.setRemoteDescription(localDescription2);12  const swappedAnswer = await swapRidAndMidExtensionsInSimulcastAnswer(localDescription2);13  await pc.setLocalDescription(swappedAnswer);14  const localDescription3 = pc.localDescription;15  await pc2.setRemoteDescription(localDescription3);16}17test();18async function swapRidAndMidExtensionsInSimulcastAnswer(answer) {19  const parsedAnswer = sdpTransform.parse(answer.sdp);20  const mediaSection = parsedAnswer.media[0];21  const midExtension = mediaSection.ext.find(ext => ext.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid');

Using AI Code Generation

1import * as wpt from 'wpt.js';2const pc = new RTCPeerConnection();3const stream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});4const videoSender = pc.addTrack(stream.getVideoTracks()[0], stream);5const audioSender = pc.addTrack(stream.getAudioTracks()[0], stream);6const offer = await pc.createOffer();7await pc.setLocalDescription(offer);8const answer = await pc.createAnswer();9const swappedAnswer = wpt.swapRidAndMidExtensionsInSimulcastAnswer(answer);10await pc.setLocalDescription(swappedAnswer);11await pc.setRemoteDescription(offer);12const remoteDescription = pc.remoteDescription;13assert_equals(remoteDescription.sdp, swappedAnswer.sdp);14pc.close();15stream.getVideoTracks()[0].stop();16stream.getAudioTracks()[0].stop();17done();

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