<!doctype html>
<html>
<head>
<title>Assigning mediastream to a video element</title>
<link rel="author" title="Dominique Hazael-Massieux" href="mailto:[email protected]"/>
<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#navigatorusermedia">
</head>
<body>
<p class="instructions">When prompted, accept to share your video stream.</p>
<h1 class="instructions">Description</h1>
<p class="instructions">This test checks that the MediaStream object returned by
the success callback in getUserMedia can be properly assigned to a video element
via the <code>srcObject</code> attribute.</p>
<audio id="aud"></audio>
<video id="vid"></video>
<div id='log'></div>
<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=permission-helper.js></script>
<script>
'use strict';
const vid = document.getElementById("vid");
function queueTask(f) {
window.onmessage = f;
window.postMessage("hi");
}
promise_test(async t => {
await setMediaPermission();
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
}, "Tests that a MediaStream can be assigned to a video element with srcObject");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
assert_true(!vid.seeking, "A MediaStream is not seekable");
assert_equals(vid.seekable.length, 0, "A MediaStream is not seekable");
}, "Tests that a MediaStream assigned to a video element is not seekable");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
assert_equals(vid.readyState, vid.HAVE_NOTHING,
"readyState is HAVE_NOTHING initially");
await new Promise(r => vid.onloadeddata = r);
assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA,
"Upon having loaded a media stream, the UA sets readyState to HAVE_ENOUGH_DATA");
}, "Tests that a MediaStream assigned to a video element is in readyState HAVE_NOTHING initially");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
assert_equals(vid.duration, NaN,
"A MediaStream does not have any duration initially.");
await new Promise(r => vid.ondurationchange = r);
assert_equals(vid.duration, Infinity,
"A loaded MediaStream does not have a pre-defined duration.");
vid.play();
await new Promise(r => vid.ontimeupdate = r);
for (const t of stream.getTracks()) {
t.stop();
}
await new Promise(r => vid.ondurationchange = r);
assert_equals(vid.duration, vid.currentTime,
"After ending playback, duration gets set to currentTime");
}, "Tests that a MediaStream assigned to a video element has expected duration");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.preload = "metadata";
vid.srcObject = stream;
assert_equals(vid.buffered.length, 0,
"A MediaStream cannot be preloaded. Therefore, there are no buffered timeranges");
assert_equals(vid.preload, "none", "preload must always be none");
vid.preload = "auto";
assert_equals(vid.preload, "none", "Setting preload must be ignored");
await new Promise(r => vid.onloadeddata = r);
assert_equals(vid.buffered.length, 0,
"A MediaStream cannot be preloaded. Therefore, there are no buffered timeranges");
vid.srcObject = null;
assert_equals(vid.preload, "metadata",
"The preload attribute returns the value it had before using a MediaStream");
}, "Tests that a video element with a MediaStream assigned is not preloaded");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.defaultPlaybackRate = 0.3;
vid.playbackRate = 0.3;
vid.onratechange = t.unreached_func("ratechange event must not be fired");
vid.srcObject = stream;
assert_equals(vid.defaultPlaybackRate, 1, "playback rate is always 1");
vid.defaultPlaybackRate = 0.5;
assert_equals(vid.defaultPlaybackRate, 1,
"Setting defaultPlaybackRate must be ignored");
assert_equals(vid.playbackRate, 1, "playback rate is always 1");
vid.playbackRate = 0.5;
assert_equals(vid.playbackRate, 1, "Setting playbackRate must be ignored");
vid.srcObject = null;
assert_equals(vid.defaultPlaybackRate, 0.3,
"The defaultPlaybackRate attribute returns the value it had before using a MediaStream");
assert_equals(vid.playbackRate, 0.3,
"The playbackRate attribute is set to the value of the defaultPlaybackRate attribute when unsetting srcObject");
// Check that there's no ratechange event
await new Promise(r => t.step_timeout(r, 100));
}, "Tests that a video element with a MediaStream assigned ignores playbackRate attributes (defaultPlaybackRate is identical)");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.defaultPlaybackRate = 0.3;
vid.playbackRate = 0.4;
vid.onratechange = t.unreached_func("ratechange event must not be fired");
vid.srcObject = stream;
assert_equals(vid.defaultPlaybackRate, 1, "playback rate is always 1");
vid.defaultPlaybackRate = 0.5;
assert_equals(vid.defaultPlaybackRate, 1,
"Setting defaultPlaybackRate must be ignored");
assert_equals(vid.playbackRate, 1, "playback rate is always 1");
vid.playbackRate = 0.5;
assert_equals(vid.playbackRate, 1, "Setting playbackRate must be ignored");
vid.srcObject = null;
assert_equals(vid.defaultPlaybackRate, 0.3,
"The defaultPlaybackRate attribute returns the value it had before using a MediaStream");
assert_equals(vid.playbackRate, 0.3,
"The playbackRate attribute is set to the value of the defaultPlaybackRate attribute when unsetting srcObject (and fires ratechange)");
await new Promise(r => vid.onratechange = r);
}, "Tests that a video element with a MediaStream assigned ignores playbackRate attributes (defaultPlaybackRate is different)");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
await new Promise(r => vid.oncanplay = r);
vid.play();
await new Promise(r => vid.ontimeupdate = r);
assert_greater_than(vid.currentTime, 0,
"currentTime is greater than 0 after first timeupdate");
assert_equals(vid.played.length, 1,
"A MediaStream's timeline always consists of a single range");
assert_equals(vid.played.start(0), 0,
"A MediaStream's timeline always starts at zero");
assert_equals(vid.played.end(0), vid.currentTime,
"A MediaStream's end MUST return the last known currentTime");
const time = vid.currentTime;
vid.currentTime = 0;
assert_equals(vid.currentTime, time,
"The UA MUST ignore attempts to set the currentTime attribute");
}, "Tests that a media element with an assigned MediaStream reports the played attribute as expected");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
assert_equals(vid.currentTime, 0, "The initial value is 0");
vid.currentTime = 42;
assert_equals(vid.currentTime, 0,
"The UA MUST ignore attempts to set the currentTime attribute (default playback start position)");
await new Promise(r => vid.onloadeddata = r);
assert_equals(vid.currentTime, 0, "The initial value is 0");
vid.currentTime = 42;
assert_equals(vid.currentTime, 0,
"The UA MUST ignore attempts to set the currentTime attribute (official playback position)");
vid.play();
await new Promise(r => vid.ontimeupdate = r);
assert_greater_than(vid.currentTime, 0,
"currentTime is greater than 0 after first timeupdate");
const lastTime = vid.currentTime;
vid.currentTime = 0;
assert_equals(vid.currentTime, lastTime,
"The UA MUST ignore attempts to set the currentTime attribute (restart)");
for(const t of stream.getTracks()) {
t.stop();
}
await new Promise(r => vid.onended = r);
assert_greater_than_equal(vid.currentTime, lastTime,
"currentTime advanced after stopping");
}, "Tests that a media element with an assigned MediaStream reports the currentTime attribute as expected");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
await new Promise(r => t.step_timeout(r, 500));
vid.play();
await new Promise(r => vid.ontimeupdate = r);
assert_between_exclusive(vid.currentTime, 0, 0.5,
"currentTime starts at 0 and has progressed at first timeupdate");
}, "Tests that a media element with an assigned MediaStream starts its timeline at 0 regardless of when the MediaStream was created");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
vid.play();
await new Promise(r => vid.ontimeupdate = r);
vid.pause();
const pauseCurrentTime = vid.currentTime;
await new Promise(r => vid.onpause = r);
vid.ontimeupdate = () => assert_unreached("No timeupdate while paused");
await new Promise(r => t.step_timeout(r, 500));
assert_equals(vid.currentTime, pauseCurrentTime,
"currentTime does not change while paused");
vid.play();
await new Promise(r => vid.ontimeupdate = r);
assert_between_exclusive(vid.currentTime - pauseCurrentTime, 0, 0.5,
"currentTime does not skip ahead after pause");
}, "Tests that a media element with an assigned MediaStream does not advance currentTime while paused");
promise_test(async t => {
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
const stream = canvas.captureStream();
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
vid.srcObject = stream;
vid.ontimeupdate = () =>
assert_unreached("No timeupdate until potentially playing");
vid.play();
await new Promise(r => t.step_timeout(r, 1000));
assert_equals(vid.readyState, vid.HAVE_NOTHING,
"Video dimensions not known yet");
const start = performance.now();
ctx.fillStyle = "green";
ctx.fillRect(0, 0, canvas.width, canvas.height);
// Wait for, and check, potentially playing
await new Promise(r => vid.oncanplay = r);
const canplayDuration = (performance.now() - start) / 1000;
// "canplay" was just dispatched from a task queued when the element became
// potentially playing. currentTime may not have progressed more than the time
// it took from becoming potentially playing to starting the
// canplay-dispatching task. Though the media clock and the js clock may be
// different, so we take double this duration, or 100ms, whichever is greater,
// as a safety margin.
const margin = Math.max(0.1, canplayDuration * 2);
assert_between_inclusive(vid.currentTime, 0, margin,
"currentTime has not advanced more than twice it took to dispatch canplay");
assert_false(vid.paused, "Media element is not paused");
assert_false(vid.ended, "Media element is not ended");
assert_equals(vid.error, null,
"Media element playback has not stopped due to errors");
assert_greater_than(vid.readyState, vid.HAVE_CURRENT_DATA,
"Media element playback is not blocked");
// Unclear how to check for "paused for user interaction" and "paused for
// in-band content".
await new Promise(r => vid.ontimeupdate = r);
assert_between_exclusive(vid.currentTime, 0, 1,
"currentTime advances while potentially playing");
}, "Tests that a media element with an assigned MediaStream does not start advancing currentTime until potentially playing");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => {
vid.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
assert_equals(vid.loop, false, "loop is false by default");
vid.srcObject = stream;
vid.loop = true;
assert_equals(vid.loop, true,
"loop can be changed when assigned a MediaStream");
await new Promise(r => vid.onloadeddata = r);
vid.loop = false;
assert_equals(vid.loop, false,
"loop can be changed when having loaded a MediaStream");
vid.play();
await new Promise(r => vid.ontimeupdate = r);
vid.loop = true;
assert_equals(vid.loop, true,
"loop can be changed when playing a MediaStream");
for(const t of stream.getTracks()) {
t.stop();
}
// If loop is ignored, we get "ended",
// otherwise the media element sets currentTime to 0 without ending.
await new Promise(r => vid.onended = r);
}, "Tests that the loop attribute has no effect on a media element with an assigned MediaStream");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => { vid.srcObject = null; });
vid.srcObject = stream;
await vid.play();
for (const track of stream.getTracks()) {
track.stop();
}
assert_false(stream.active, "MediaStream becomes inactive with only ended tracks");
assert_false(vid.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (sync)");
await Promise.resolve();
assert_false(vid.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (microtask)");
let ended = false;
vid.onended = () => ended = true;
await new Promise(r => queueTask(r));
assert_true(vid.ended, "HTMLMediaElement becomes ended asynchronously when its MediaStream provider becomes inactive");
assert_true(ended, "HTMLMediaElement fires the ended event asynchronously when its MediaStream provider becomes inactive");
}, "Tests that a media element with an assigned MediaStream ends when the MediaStream becomes inactive through tracks ending");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
t.add_cleanup(() => {
aud.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
aud.srcObject = stream;
await aud.play();
for (const track of stream.getAudioTracks()) {
track.stop();
}
assert_true(stream.active, "MediaStream is still active with a live video track");
assert_false(aud.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (sync)");
await Promise.resolve();
assert_false(aud.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (microtask)");
let ended = false;
aud.onended = () => ended = true;
await new Promise(r => queueTask(r));
assert_true(aud.ended, "HTMLAudioElement becomes ended asynchronously when its MediaStream provider becomes inaudible");
assert_true(ended, "HTMLAudioElement fires the ended event asynchronously when its MediaStream provider becomes inaudible");
}, "Tests that an audio element with an assigned MediaStream ends when the MediaStream becomes inaudible through audio tracks ending");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({video: true});
t.add_cleanup(() => { vid.srcObject = null; });
vid.srcObject = stream;
await vid.play();
for (const track of stream.getTracks()) {
stream.removeTrack(track);
}
assert_false(stream.active, "MediaStream becomes inactive with no tracks");
assert_false(vid.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (sync)");
await Promise.resolve();
assert_false(vid.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (microtask)");
let ended = false;
vid.onended = () => ended = true;
await new Promise(r => queueTask(r));
assert_true(vid.ended, "HTMLMediaElement becomes ended asynchronously when its MediaStream provider becomes inactive");
assert_true(ended, "HTMLMediaElement fires the ended event asynchronously when its MediaStream provider becomes inactive");
}, "Tests that a media element with an assigned MediaStream ends when the MediaStream becomes inactive through track removal");
promise_test(async t => {
const stream = await navigator.mediaDevices.getUserMedia({audio: true, video: true});
t.add_cleanup(() => {
aud.srcObject = null;
stream.getTracks().forEach(track => track.stop());
});
aud.srcObject = stream;
await aud.play();
for (const track of stream.getAudioTracks()) {
stream.removeTrack(track);
}
assert_true(stream.active, "MediaStream is still active with a live video track");
assert_false(aud.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (sync)");
await Promise.resolve();
assert_false(aud.ended, "HTMLMediaElement reports ended the next time the event loop reaches step 1 (microtask)");
let ended = false;
aud.onended = () => ended = true;
await new Promise(r => queueTask(r));
assert_true(aud.ended, "HTMLAudioElement becomes ended asynchronously when its MediaStream provider becomes inaudible");
assert_true(ended, "HTMLAudioElement fires the ended event asynchronously when its MediaStream provider becomes inaudible");
}, "Tests that an audio element with an assigned MediaStream ends when the MediaStream becomes inaudible through track removal");
</script>
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