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<!doctype html>
<html>
<meta name="timeout" content="long">
<head>
<title>MediaRecorder canvas media source</title>
<meta name=variant content="?mimeType=''">
<meta name=variant content="?mimeType=video/webm;codecs=vp8,opus">
<meta name=variant content="?mimeType=video/webm;codecs=vp9,opus">
<meta name=variant content="?mimeType=video/webm;codecs=av1,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=avc1.64003E,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=avc3.64003E,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=vp9,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=av01,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=av01,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=hvc1.1.6.L186.B0,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=hev1.1.6.L186.B0,opus">
<meta name=variant content="?mimeType=video/mp4;codecs=hvc1.1.6.L186.B0,mp4a.40.2">
<meta name=variant content="?mimeType=video/mp4;codecs=hev1.1.6.L186.B0,mp4a.40.2">
<meta name=variant content="?mimeType=video/x-matroska;codecs=hvc1.1.6.L186.B0,opus">
<meta name=variant content="?mimeType=video/x-matroska;codecs=hev1.1.6.L186.B0,opus">
<meta name=variant content="?mimeType=video/mp4">
<link rel="help"
href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="../mediacapture-streams/permission-helper.js"></script>
</head>
<body>
<script>
async function createWorker(script) {
script += "self.postMessage('ready');";
const blob = new Blob([script], { type: 'text/javascript' });
const url = URL.createObjectURL(blob);
const worker = new Worker(url);
await new Promise(resolve => worker.onmessage = resolve);
return worker;
}
async_test(test => {
const CANVAS_WIDTH = 256;
const CANVAS_HEIGHT = 144;
let large_size_data_available = false;
// Empty video frames from this resolution consistently have ~750 bytes in my
// tests, while valid video frames usually contain 7-8KB. A threshold of
// 1.5KB consistently fails when video frames are empty but passes when video
// frames are non-empty.
const THRESHOLD_FOR_EMPTY_FRAMES = 1500;
const CAMERA_CONSTRAINTS = {
video: {
width: { ideal: CANVAS_WIDTH },
height: { ideal: CANVAS_HEIGHT }
}
};
function useUserMedia(constraints) {
let activeStream = null;
function startCamera() {
return navigator.mediaDevices.getUserMedia(constraints).then(
(stream) => {
activeStream = stream;
return stream;
}
);
}
function stopCamera() {
activeStream?.getTracks().forEach((track) => track.stop());
}
return { startCamera, stopCamera };
}
function useMediaRecorder(stream, mimeType, frameSizeCallback) {
const mediaRecorder = new MediaRecorder(
stream, { mimeType }
);
mediaRecorder.ondataavailable = event => {
const {size} = event.data;
frameSizeCallback(size);
if (mediaRecorder.state !== "inactive") {
mediaRecorder.stop();
}
};
mediaRecorder.onstop = event => {
assert_equals(large_size_data_available, true),
"onstop is called after valid data is available";
};
mediaRecorder.start(1000);
}
const params = new URLSearchParams(window.location.search);
const mimeType = params.get('mimeType');
if (mimeType && !MediaRecorder.isTypeSupported(mimeType)) {
test.done();
return;
}
const {startCamera, stopCamera} = useUserMedia(CAMERA_CONSTRAINTS);
startCamera().then(async stream => {
const videoTrack = stream.getVideoTracks()[0];
const worker = await createWorker(`
const CANVAS_WIDTH = ${CANVAS_WIDTH};
const CANVAS_HEIGHT = ${CANVAS_HEIGHT};
onmessage = e => {
const videoTrack = e.data;
const { readable: readableStream } = new MediaStreamTrackProcessor({
track: videoTrack
});
const composedTrackGenerator = new VideoTrackGenerator();
const sink = composedTrackGenerator.writable;
const canvas = new OffscreenCanvas(CANVAS_WIDTH, CANVAS_HEIGHT);
const ctx = canvas.getContext("2d", {
alpha: false,
});
ctx.fillStyle = "#333";
ctx.fillRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);
const transformer = new TransformStream({
async transform(cameraFrame, controller) {
if (cameraFrame && cameraFrame?.codedWidth > 0) {
const leftPos = (CANVAS_WIDTH - cameraFrame.displayWidth) / 2;
const topPos = (CANVAS_HEIGHT - cameraFrame.displayHeight) / 2;
ctx.drawImage(cameraFrame, leftPos, topPos);
const newFrame = new VideoFrame(canvas, {
timestamp: cameraFrame.timestamp
});
cameraFrame.close();
controller.enqueue(newFrame);
}
}
});
readableStream.pipeThrough(transformer).pipeTo(sink);
self.postMessage(composedTrackGenerator.track, [composedTrackGenerator.track]);
}
`);
try {
worker.postMessage(videoTrack, [videoTrack]);
} catch(e) {
test.step_func_done(() => {
assert_unreached("MediaStreamTrack transfer not supported");
})();
}
const composedTrack = await new Promise((resolve, reject) => {
worker.onmessage = e => resolve(e.data);
test.step_timeout(() => reject("unable to get composited track"), 2000);
});
const compositedMediaStream = new MediaStream([composedTrack]);
useMediaRecorder(compositedMediaStream, mimeType, (size => {
if (size > THRESHOLD_FOR_EMPTY_FRAMES) {
large_size_data_available = true;
stopCamera();
test.done();
}
}));
});
}, "MediaRecorder returns frames containing video content");
</script>
</body>
</html>
|
