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<!doctype html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title></title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
// A generous testing duration that will not time out on bots.
const kEncodeDurationMs = 10000;
// The crash this test aims to repro was easy to reproduce using a normal
// getUserMedia() track when running the browser normally, e.g. by navigating
// to https://jsfiddle.net/henbos/fc7gk3ve/11/. But for some reason, the fake
// tracks returned by getUserMedia() when inside this testing environment had
// a much harder time with reproducibility.
//
// By creating a high FPS canvas capture track we are able to repro reliably
// in this WPT environment as well.
function whiteNoise(width, height) {
const canvas =
Object.assign(document.createElement('canvas'), {width, height});
const ctx = canvas.getContext('2d');
ctx.fillRect(0, 0, width, height);
const p = ctx.getImageData(0, 0, width, height);
requestAnimationFrame(function draw () {
for (let i = 0; i < p.data.length; i++) {
const color = Math.random() * 255;
p.data[i++] = color;
p.data[i++] = color;
p.data[i++] = color;
}
ctx.putImageData(p, 0, 0);
requestAnimationFrame(draw);
});
return canvas.captureStream();
}
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const stream = whiteNoise(640, 480);
const [track] = stream.getTracks();
const t1 = pc1.addTransceiver("video", {direction:"sendonly"});
const t2 = pc1.addTransceiver("video", {direction:"sendonly"});
await t1.sender.replaceTrack(track);
await t2.sender.replaceTrack(track);
exchangeIceCandidates(pc1, pc2);
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
// In Chromium, each sender instantiates a VideoStreamEncoder during
// negotiation. This test reproduces https://crbug.com/webrtc/11485 where a
// race causes a crash when multiple VideoStreamEncoders are encoding the
// same MediaStreamTrack.
await new Promise(resolve => t.step_timeout(resolve, kEncodeDurationMs));
}, "Two RTCRtpSenders encoding the same track");
</script>
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