test_peerConnection_setCodecPreferencesOfferSdp.html

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<!DOCTYPE HTML>

<html>

<head>

  <script type="application/javascript" src="pc.js"></script>

  <script type="application/javascript" src="helpers_from_wpt/sdp.js"></script>

</head>

<body>

<pre id="test">

<script type="application/javascript">

  createHTML({

    bug: "1909443",

    title: "No rtcp-fb or fmtp for payload types excluded by setCodecPreferences"

});

  function unlistedPayloadTypes(sdp) {

    return SDPUtils.getMediaSections(sdp).flatMap(section => {

      const listed = new Set(SDPUtils.getPayloadTypes(section));

      return [

        ...SDPUtils.getFmtpPayloadTypes(section),

        ...SDPUtils.getRtcpFbPayloadTypes(section),

      ].filter(pt => pt != "*" && !listed.has(pt));

});

  runNetworkTest(async () => {

    const pc = new RTCPeerConnection();

    const transceiver = pc.addTransceiver("video");

    const codecs = RTCRtpSender.getCapabilities("video").codecs;

    ok(codecs.some(c => c.mimeType == "video/VP8"), "VP8 is available");

    transceiver.setCodecPreferences(

      codecs.filter(c => c.mimeType != "video/VP8")

);

    const offer = await pc.createOffer();

    ok(!offer.sdp.match(/a=rtpmap:\d+ VP8\//), "VP8 not offered");

    isDeeply(

      unlistedPayloadTypes(offer.sdp),

[],

      "No rtcp-fb or fmtp lines for payload types missing from m= line"

);

    const pc2 = new RTCPeerConnection();

    await pc.setLocalDescription(offer);

    await pc2.setRemoteDescription(offer);

    const answer = await pc2.createAnswer();

    await pc2.setLocalDescription(answer);

    await pc.setRemoteDescription(answer);

    const reoffer = await pc.createOffer();

    isDeeply(

      unlistedPayloadTypes(reoffer.sdp),

[],

      "No stale rtcp-fb or fmtp lines in the re-offer"

);

    pc.close();

    pc2.close();

});

</script>

</pre>

</body>

</html>