зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
2.9 KiB
HTML
105 строки
2.9 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Autoplay policy test : use media element as source for web audio</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<script type="text/javascript" src="manifest.js"></script>
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</head>
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<body>
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<script>
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/**
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* This test is used to ensure blocked AudioContext would be resumed when the
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* source media element of MediaElementAudioSouceNode which has been created and
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* connected to destinationnode starts.
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*/
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SimpleTest.waitForExplicitFinish();
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(async function testResumeAudioContextWhenMediaElementSourceStarted() {
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await setupTestPreferences();
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info(`- create audio context -`);
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createAudioContext();
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info(`- AudioContext is not allowed to start in beginning -`);
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await audioContextShouldBeBlocked();
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info(`- create a source for web audio and start the source -`);
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await useMediaElementAsSourceAndPlayMediaElement();
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info(`- AudioContext should be allowed to start after MediaElementAudioSourceNode started -`);
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await audioContextShouldBeAllowedToStart();
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endTest();
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})();
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/**
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* Test utility functions
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*/
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function setupTestPreferences() {
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return SpecialPowers.pushPrefEnv({"set": [
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["media.autoplay.default", SpecialPowers.Ci.nsIAutoplay.BLOCKED],
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["media.autoplay.enabled.user-gestures-needed", true],
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["media.autoplay.block-webaudio", true],
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["media.autoplay.block-event.enabled", true],
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]});
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}
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function createAudioContext() {
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window.ac = new AudioContext();
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ac.allowedToStart = new Promise(resolve => {
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ac.addEventListener("statechange", function() {
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if (ac.state === "running") {
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resolve();
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}
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}, {once: true});
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});
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ac.notAllowedToStart = new Promise(resolve => {
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ac.addEventListener("blocked", async function() {
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resolve();
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}, {once: true});
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});
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}
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async function audioContextShouldBeBlocked() {
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await ac.notAllowedToStart;
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is(ac.state, "suspended", `AudioContext is blocked.`);
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}
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async function useMediaElementAsSourceAndPlayMediaElement() {
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let video = document.createElement('video');
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video.src = "gizmo.mp4";
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let source = ac.createMediaElementSource(video);
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source.connect(ac.destination);
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// simulate user gesture in order to start video.
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SpecialPowers.wrap(document).notifyUserGestureActivation();
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await playVideo(video);
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}
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async function playVideo(video) {
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video.play();
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await once(video, "play");
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ok(true, `video started.`);
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removeNodeAndSource(video);
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}
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async function audioContextShouldBeAllowedToStart() {
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await ac.allowedToStart;
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is(ac.state, "running", `AudioContext is allowed to start.`);
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}
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function endTest() {
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// reset the activation flag in order not to interfere following test in the
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// verify mode which would run the test using same document couple times.
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SpecialPowers.wrap(document).clearUserGestureActivation();
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SimpleTest.finish();
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}
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</script>
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