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Mercurial (b6d82b1a6b02)

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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: "1244913",
    title: "Scale resolution down on a PeerConnection",
    visible: true
  });

  var mustRejectWith = (msg, reason, f) =>
    f().then(() => ok(false, msg),
             e => is(e.name, reason, msg));

  async function testScale(codec) {
    var pc1 = new RTCPeerConnection();
    var pc2 = new RTCPeerConnection();

    var add = (pc, can, failed) => can && pc.addIceCandidate(can).catch(failed);
    pc1.onicecandidate = e => add(pc2, e.candidate, generateErrorCallback());
    pc2.onicecandidate = e => add(pc1, e.candidate, generateErrorCallback());

    info("testing scaling with " + codec);

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

    var v1 = createMediaElement('video', 'v1');
    var v2 = createMediaElement('video', 'v2');

    var ontrackfired = new Promise(resolve => pc2.ontrack = e => resolve(e));
    var v2loadedmetadata = new Promise(resolve => v2.onloadedmetadata = resolve);

    is(v2.currentTime, 0, "v2.currentTime is zero at outset");

    v1.srcObject = stream;
    var sender = pc1.addTrack(stream.getVideoTracks()[0], stream);

    await mustRejectWith(
        "Invalid scaleResolutionDownBy must reject", "RangeError",
        () => sender.setParameters(
            { encodings:[{ scaleResolutionDownBy: 0.5 } ] })
    );

    await sender.setParameters({ encodings: [{ maxBitrate: 60000,
                                               scaleResolutionDownBy: 2 }] });

    let offer = await pc1.createOffer();
    if (codec == "VP8") {
      offer.sdp = sdputils.removeAllButPayloadType(offer.sdp, 126);
    }
    await pc1.setLocalDescription(offer);
    await pc2.setRemoteDescription(pc1.localDescription);

    let answer = await pc2.createAnswer();
    await pc2.setLocalDescription(answer);
    await pc1.setRemoteDescription(pc2.localDescription);
    let trackevent = await ontrackfired;

    v2.srcObject = trackevent.streams[0];

    await v2loadedmetadata;

    await waitUntil(() => v2.currentTime > 0);
    ok(v2.currentTime > 0, "v2.currentTime is moving (" + v2.currentTime + ")");

    ok(v1.videoWidth > 0, "source width is positive");
    ok(v1.videoHeight > 0, "source height is positive");
    is(v2.videoWidth, v1.videoWidth / 2, "sink is half the width of source");
    is(v2.videoHeight, v1.videoHeight / 2, "sink is half the height of source");
    stream.getTracks().forEach(track => track.stop());
    v1.srcObject = v2.srcObject = null;
    pc1.close()
    pc2.close()
  }

  runNetworkTest(async () => {
    await pushPrefs(['media.peerconnection.video.lock_scaling', true]);
    await testScale("VP8");
    if (!navigator.appVersion.includes("Android")) {
      // No support for H.264 on Android in automation, see Bug 1355786
      await testScale("H264");
    }
    networkTestFinished();
  });
</script>
</pre>
</body>
</html>