test_peerConnection_basicScreenshare.html

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<!DOCTYPE HTML>

<html>

<head>

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

</head>

<body>

<pre id="test">

<script type="application/javascript">

  createHTML({

    bug: "1039666",

    title: "Basic screenshare-only peer connection"

});

  async function supportedVideoPayloadTypes() {

    const pc = new RTCPeerConnection();

    const offer = await pc.createOffer({offerToReceiveVideo: true});

    return sdputils.getPayloadTypes(offer.sdp);

  async function testScreenshare(payloadType) {

    const options = {};

    options.h264 = payloadType == 97 || payloadType == 126;

    const test = new PeerConnectionTest(options);

    const constraints = {

      video: { mediaSource: "screen" },

};

    test.setMediaConstraints([constraints], []);

    test.chain.insertAfterEach("PC_LOCAL_CREATE_OFFER", [

      function PC_LOCAL_ISOLATE_CODEC() {

        info(`Forcing payload type ${payloadType}. Note that other associated ` +

             `payload types, like RTX, are removed too.`);

        test.originalOffer.sdp =

          sdputils.removeAllButPayloadType(test.originalOffer.sdp, payloadType);

},

]);

    await test.run();

  runNetworkTest(async () => {

    await SpecialPowers.pushPrefEnv({ set: [["media.navigator.video.red_ulpfec_enabled", true]] });

    await matchPlatformH264CodecPrefs();

    const pts = await supportedVideoPayloadTypes();

    ok(pts.includes("120"), "VP8 is supported");

    ok(pts.includes("121"), "VP9 is supported");

    if (pts.length > 2) {

      is(pts.length, 6, "Expected VP8, VP9, two variants of H264, ULPFEC, and RED");

      ok(pts.includes("97"), "H264 with no packetization-mode is supported");

      ok(pts.includes("126"), "H264 with packetization-mode=1 is supported");

      ok(pts.includes("122"), "RED is supported");

      ok(pts.includes("123"), "ULPFEC is supported");

    for (const pt of pts) {

      if (pt == "122" || pt == "123") {

        // ULPFEC and RED are meant to work combined with other codecs.

        // Forcing sdp with only one of them is not supported and will result in failures.

        continue;

      await testScreenshare(pt);

});

</script>

</pre>

</body>

</html>