test_peerConnection_replaceNullTrackThenRenegotiateVideo.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<head>

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

  <script type="application/javascript" src="/tests/dom/canvas/test/captureStream_common.js"></script>

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

<body>

<pre id="test">

<script type="application/javascript">

  createHTML({

    bug: "1763832",

    title: "Renegotiation (video): Start with no track and recvonly, then replace and set direction to sendrecv, then renegotiate"

});

  runNetworkTest(async () => {

    await pushPrefs(

      ['media.video_loopback_dev', ''],

      ['media.navigator.streams.fake', true]);

    // [TODO] re-enable HW decoder after bug 1526207 is fixed.

    if (navigator.userAgent.includes("Android")) {

      await pushPrefs(["media.navigator.mediadatadecoder_vpx_enabled", false],

                      ["media.webrtc.hw.h264.enabled", false]);

    const offerer = new RTCPeerConnection();

    const answerer = new RTCPeerConnection();

    const transceiverSend = offerer.addTransceiver('video', {direction: 'recvonly'});

    const add = (pc, can, failed) => can && pc.addIceCandidate(can).catch(failed);

    offerer.onicecandidate = e => add(answerer, e.candidate, generateErrorCallback());

    answerer.onicecandidate = e => add(offerer, e.candidate, generateErrorCallback());

    await offerer.setLocalDescription();

    await answerer.setRemoteDescription(offerer.localDescription);

    await answerer.setLocalDescription();

    await offerer.setRemoteDescription(answerer.localDescription);

    // add video with replaceTrack, set send bit, and renegotiate

    const stream = await navigator.mediaDevices.getUserMedia({video: true});

    const [track] = stream.getVideoTracks();

    transceiverSend.sender.replaceTrack(track);

    transceiverSend.direction = "sendrecv";

    const metadataToBeLoaded = [];

    answerer.ontrack = (e) => {

      metadataToBeLoaded.push(getPlaybackWithLoadedMetadata(e.track));

};

    await offerer.setLocalDescription();

    await answerer.setRemoteDescription(offerer.localDescription);

    await answerer.setLocalDescription();

    await offerer.setRemoteDescription(answerer.localDescription);

    const elems = await Promise.all(metadataToBeLoaded);

    is(elems.length, 1, "Should have one video element");

    const helper = new VideoStreamHelper();

    await helper.checkVideoPlaying(elems[0]);

});

</script>

</pre>

</body>

</html>