46 lines
1.3 KiB
HTML
46 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<html class="reftest-wait">
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<head>
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<title>Bug 1378826 : Removing last video track from recorder stream crashes.</title>
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</head>
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<body>
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<canvas id="canvas"></canvas>
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<script type="text/javascript">
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function wait(ms) {
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return new Promise(resolve => setTimeout(resolve, ms));
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}
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function boom() {
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let canvas = document.getElementById("canvas");
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let ctx = canvas.getContext('2d');
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ctx.fillRect(10, 10, 100, 100);
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let stream = canvas.captureStream();
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let rec = new MediaRecorder(stream);
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// At the time of fixing this bug onstop would fire, but this may change in
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// future. As such defensively listen for onerror too to prevent this test
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// timing out.
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let stoppedPromise = new Promise(y => (rec.onstop = y,
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rec.onerror = e => y));
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rec.onstart = () => {
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// Remove the video track from the stream we're recording
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stream.removeTrack(stream.getTracks()[0]);
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// Recorder should stop or error in response to the above
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return stoppedPromise
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.then(() => {
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// Little wait to help get bad writes if they're going to happen
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wait(100)
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.then(() => {
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// Didn't crash, finish
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document.documentElement.removeAttribute("class");
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});
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});
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};
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rec.start();
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}
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window.onload = boom;
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</script>
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</body>
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</html>
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