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request-video-frame-callback.html
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<!DOCTYPE html>
<html>
<title>Test the basics of the video.requestVideoFrameCallback() API.</title>
<body></body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<script>
var testVideo = {
url: getVideoURI('/media/movie_5'),
height: 240,
width: 320,
}
var altTestVideo = {
url: getVideoURI('/media/counting'),
height: 240,
width: 320,
}
promise_test(async function(t) {
let done;
const promise = new Promise(resolve => done = resolve);
let video = document.createElement('video');
document.body.appendChild(video);
let id = video.requestVideoFrameCallback(
t.step_func((time, metadata) => {
assert_true(time > 0);
assert_equals(metadata.height, testVideo.height);
assert_equals(metadata.width, testVideo.width);
done();
})
);
assert_true(id > 0);
video.src = testVideo.url;
await video.play();
return promise;
}, 'Test we can register a video.rVFC callback.');
promise_test(async function(t) {
let done;
const promise = new Promise(resolve => done = resolve);
let video = document.createElement('video');
document.body.appendChild(video);
video.requestVideoFrameCallback(
t.step_func(video_now => {
// Queue a call to window.rAF, and make sure it is executed within the
// same turn of the event loop (with the same 'time' parameter).
window.requestAnimationFrame( t.step_func( window_now => {
assert_equals(video_now, window_now);
done();
}));
})
);
video.src = testVideo.url;
await video.play();
return promise;
}, 'Test video.rVFC callbacks run before window.rAF callbacks.');
promise_test(async function(t) {
let done;
const promise = new Promise(resolve => done = resolve);
let video = document.createElement('video');
document.body.appendChild(video);
let id = video.requestVideoFrameCallback(
t.step_func(_ => {
assert_unreached("Cancelled callbacks shouldn't be executed")
})
);
video.cancelVideoFrameCallback(id);
video.requestVideoFrameCallback(
t.step_func(_ => {
// At this point, the other callback shouldn't have fired, but
// give it some more time and really make sure it doesn't, by going
// throught the event loop once more.
t.step_timeout(() => { done(); }, 0);
})
);
video.src = testVideo.url;
await video.play();
return promise;
}, 'Test we can cancel a video.rVFC request.');
test(function(t) {
let video = document.createElement('video');
document.body.appendChild(video);
// requestVideoFrameCallback() expects 1 function as a parameter.
assert_throws_js(TypeError, _ => { video.requestVideoFrameCallback() } );
assert_throws_js(TypeError, _ => { video.requestVideoFrameCallback(0) });
assert_throws_js(TypeError, _ => { video.requestVideoFrameCallback("foo") });
// cancelVideoFrameCallback() expects 1 number as a parameter
assert_throws_js(TypeError, _ => { video.cancelVideoFrameCallback() } );
// Invalid calls are just no-ops
video.cancelVideoFrameCallback(_ => {});
video.cancelVideoFrameCallback(NaN);
video.cancelVideoFrameCallback("foo");
video.cancelVideoFrameCallback(12345);
video.cancelVideoFrameCallback(-1);
}, 'Test invalid calls to the video.rVFC API.');
promise_test(async function(t) {
let video = document.createElement('video');
video.autoplay = true;
document.body.appendChild(video);
let first_width = 0;
let first_height = 0;
video.src = testVideo.url;
await video.play();
// Switch to and from a second video, and make sure we get rVFC calls at
// each step.
return new Promise((resolve, reject) => {
let onReturnToOriginalVideo = t.step_func((now, metadata) => {
assert_equals(first_width, metadata.width);
assert_equals(first_height, metadata.height);
resolve();
});
let onAltVideoFirstFrame = t.step_func((now, metadata) => {
// The videos have different sizes, and shouldn't match.
assert_not_equals(first_width, metadata.width);
assert_not_equals(first_height, metadata.height);
// Swith back to the original video.
video.requestVideoFrameCallback(onReturnToOriginalVideo);
video.src = testVideo.url;
});
let onFirstFrame = t.step_func((now, metadata) => {
first_width = metadata.width;
first_height = metadata.height;
// Callbacks should persist after changing the source to the alt video.
video.requestVideoFrameCallback(onAltVideoFirstFrame);
video.src = altTestVideo.url;
})
video.requestVideoFrameCallback(onFirstFrame);
});
}, 'Test video.rVFC does not stop when switching sources.');
</script>
</html>