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<!DOCTYPE HTML>
<html>
<head>
<title>Test for the playbackRate property </title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script type="text/javascript" src="manifest.js"></script>
</head>
<body>
<pre id="test">
<script class="testbody" type='application/javascript'>
let manager = new MediaTestManager;
function rangeCheck(lhs, rhs, threshold) {
var diff = Math.abs(lhs - rhs);
if (diff < threshold) {
return true;
}
return false;
}
function checkPlaybackRate(wallclock, media, expected, threshold) {
if (rangeCheck(media / wallclock, expected, threshold)) {
return true;
}
return false;
}
// Those value are expected to match those at the top of HTMLMediaElement.cpp.
let VERY_SLOW_RATE = 1 / 32,
SLOW_RATE = 1 / 16,
FAST_RATE = 16,
VERY_FAST_RATE = 20,
NULL_RATE = 0.0;
function ontimeupdate(e) {
var t = e.target;
// Skip short files for SoundTouch doesn't work well on small number of samples.
if (t.gotEnded || t.duration < 2) {
return;
}
t.testedForSlowdown = true;
if (t.currentTime > t.duration / 2) {
t.oldCurrentTime = t.currentTime;
t.timestamp = Date.now();
var delta = t.oldCurrentTime,
delta_wallclock = (t.timestamp - t.startTimestamp - t.bufferingTime) / 1000;
t.preservesPitch = false;
is(t.preservesPitch, false, t.name + ": If we disable the pitch preservation, it should appear as such.");
t.bufferingTime = 0;
is(t.playbackRate, SLOW_RATE, t.name + ": The playback rate shoud be "+SLOW_RATE+".");
ok(checkPlaybackRate(delta_wallclock, delta, SLOW_RATE, 0.25), t.name + ": We are effectively slowing down playback. (" + delta_wallclock + ", " + delta + ")");
t.removeEventListener("timeupdate", ontimeupdate);
t.addEventListener("pause", onpaused);
t.playbackRate = NULL_RATE;
t.oldCurrentTime = t.currentTime;
setTimeout(function() {
afterNullPlaybackRate(e);
}, 100);
}
}
function onpaused(e) {
var t = e.target;
t.pausedReceived = true;
}
function afterNullPlaybackRate(e) {
var t = e.target;
// skip if we have received 'ended' event or 'ended' event is pending.
if (t.gotEnded || t.ended) {
return;
}
t.testedForNull = true;
ok(t.currentTime == t.oldCurrentTime, t.name + ": Current time should not change when playbackRate is null (" + t.currentTime + " " + t.oldCurrentTime + ").");
ok(!t.paused, t.name + ": The element should not be in paused state.");
t.removeEventListener("paused", onpaused);
is(t.pausedReceived, undefined, t.name + ": Paused event should not have been received.");
t.timestamp = Date.now();
t.oldCurrentTime = t.currentTime;
t.playbackRate = VERY_FAST_RATE;
is(t.playbackRate, VERY_FAST_RATE, t.name + ": Playback rate should be clamped to " + VERY_FAST_RATE + ".");
}
function onended(e) {
var t = e.target;
t.gotEnded = true;
t.bufferingTime = 0;
// If we got "ended" too early, skip these tests.
if (t.testedForSlowdown && t.testedForNull) {
is(t.playbackRate, FAST_RATE, t.name + ": The playback rate should still be "+FAST_RATE+".");
ok(!t.muted, t.name + ": The audio should be muted when playing at high speed, but should not appear as such.");
is(t.currentTime, t.duration, t.name + ": Current time should be equal to the duration (not change by playback rate).");
}
finish_test(t);
}
function onratechange(e) {
if (!e.target.ratechangecount) {
e.target.ratechangecount = 0;
}
e.target.ratechangecount++;
}
function finish_test(element) {
removeNodeAndSource(element);
manager.finished(element.token);
}
// These two functions handle the case when the playback pauses for buffering. It
// adjusts the timestamps to be accurate. Despite the fact that the web servers
// is supposed to be on the same machine, buffering pauses can occur (rarely,
// but still).
function onplaying(e) {
var t = e.target;
if (t.bufferingTimestamp != undefined) {
t.bufferingTime += (Date.now() - t.bufferingTimestamp);
t.bufferingTimestamp = undefined;
}
}
function onwaiting(e) {
var t = e.target;
t.bufferingTimestamp = Date.now();
}
function onvolumechange(e) {
ok(false, e.target.name + ": We should not receive a volumechange event when changing the playback rate.");
}
function startTest(test, token) {
let elemType = /^audio/.test(test.type) ? "audio" : "video";
let element = document.createElement(elemType);
element.src = test.name;
element.name = test.name;
element.preload = "metadata";
element.token = token;
element.controls = true;
element.bufferingTime = 0;
document.body.appendChild(element);
element.addEventListener("ratechange", onratechange);
element.addEventListener("timeupdate", ontimeupdate);
element.addEventListener("ended", onended);
element.addEventListener("waiting", onwaiting);
element.addEventListener("playing", onplaying);
element.addEventListener("volumechange", onvolumechange);
manager.started(token);
element.startTimestamp = Date.now();
is(element.preservesPitch, true, test.name + ": Pitch preservation should be enabled by default.");
element.addEventListener("loadedmetadata", function() {
is(element.playbackRate, 1.0, test.name + ": playbackRate should be initially 1.0");
is(element.defaultPlaybackRate, 1.0, test.name + ": defaultPlaybackRate should be initially 1.0");
element.playbackRate = VERY_SLOW_RATE;
is(element.playbackRate, VERY_SLOW_RATE, test.name + ": PlaybackRate should be " + VERY_SLOW_RATE + ".");
element.play();
element.playbackRate = SLOW_RATE;
});
}
manager.runTests(gPlayedTests, startTest);
</script>
</pre>
<div id="elements">
</div>
</body>
</html>
|
