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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
});
async function checkForH264Support() {
const pc = new RTCPeerConnection();
const offer = await pc.createOffer({offerToReceiveVideo: true});
return offer.sdp.match(/a=rtpmap:[1-9][0-9]* H264/);
}
let resolutionAlignment = 1;
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);
const otherErrorStart = await GleanTest.rtcrtpsenderSetparameters.failOther.testGetValue();
const noTransactionIdWarningStart = await GleanTest.rtcrtpsenderSetparameters.warnNoTransactionid.testGetValue();
await mustRejectWith(
"Invalid scaleResolutionDownBy must reject", "RangeError",
() => sender.setParameters(
{ encodings:[{ scaleResolutionDownBy: 0.5 } ] })
);
const otherErrorEnd = await GleanTest.rtcrtpsenderSetparameters.failOther.testGetValue();
const noTransactionIdWarningEnd = await GleanTest.rtcrtpsenderSetparameters.warnNoTransactionid.testGetValue();
// Make sure Glean is recording these statistics
is(otherErrorEnd.denominator, otherErrorStart.denominator, "No new RTCRtpSenders were created during this time");
is(otherErrorEnd.numerator, otherErrorStart.numerator + 1, "RTCRtpSender.setParameters reported a failure via Glean");
is(noTransactionIdWarningEnd.denominator, noTransactionIdWarningStart.denominator, "No new RTCRtpSenders were created during this time");
is(noTransactionIdWarningEnd.numerator, noTransactionIdWarningStart.numerator + 1, "Glean should have recorded a warning due to missing transactionId");
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");
const expectedWidth =
v1.videoWidth / 2 - (v1.videoWidth / 2 % resolutionAlignment);
const expectedHeight =
v1.videoHeight / 2 - (v1.videoHeight / 2 % resolutionAlignment);
is(v2.videoWidth, expectedWidth,
"sink is half the width of the source");
is(v2.videoHeight, expectedHeight,
"sink is half the height of the source");
stream.getTracks().forEach(track => track.stop());
v1.srcObject = v2.srcObject = null;
pc1.close()
pc2.close()
}
runNetworkTest(async () => {
await matchPlatformH264CodecPrefs();
const hasH264 = await checkForH264Support();
if (hasH264 && navigator.userAgent.includes("Android")) {
// Android only has a hw encoder for h264
resolutionAlignment = 16;
}
await pushPrefs(['media.peerconnection.video.lock_scaling', true]);
await testScale("VP8");
if (hasH264) {
await testScale("H264");
}
});
</script>
</pre>
</body>
</html>
|
