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<!DOCTYPE HTML>
<html>
<head>
<title>Autoplay policy test : createMediaStreamSource with active stream</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>
<script>
/**
* This test is used to ensure that we would try to start the blocked AudioContext
* which is blocked by autoplay policy, when it creates a MediaStreamAudioSourceNode
* which has a active input stream.
*/
SimpleTest.waitForExplicitFinish();
(async function testStartAudioContextWhenCreatingMediaStreamAudioSourceWithActiveStream() {
await setupTestPreferences();
info(`- create 2 AudioContext, one is used to generate active stream, another one is used to test whether it would be resumed after starting MediaStreamAudioSource with active stream -`);
createAudioContexts();
info(`- both AudioContext are not allowed to start in beginning -`);
await audioContextsShouldBeBlocked();
info(`- using AudioContext2 to create a MediaStreamAudioSourceNode with active stream, which should resume AudioContext2 -`);
await createMediaStreamAudioSourceByAudioContext2();
endTest();
})();
/**
* Test utility functions
*/
function setupTestPreferences() {
return SpecialPowers.pushPrefEnv({"set": [
["media.autoplay.default", SpecialPowers.Ci.nsIAutoplay.BLOCKED],
["media.autoplay.blocking_policy", 0],
["media.autoplay.block-webaudio", true],
["media.autoplay.block-event.enabled", true],
]});
}
function createAudioContexts() {
/* global ac1, ac2 */
window.ac1 = new AudioContext();
window.ac2 = new AudioContext();
ac1.allowedToStart = new Promise(resolve => {
ac1.addEventListener("statechange", function() {
if (ac1.state === "running") {
resolve();
}
}, {once: true});
});
ac1.notAllowedToStart = new Promise(resolve => {
ac1.addEventListener("blocked", async function() {
resolve();
}, {once: true});
});
ac2.allowedToStart = new Promise(resolve => {
ac2.addEventListener("statechange", function() {
if (ac2.state === "running") {
resolve();
}
}, {once: true});
});
ac2.notAllowedToStart = new Promise(resolve => {
ac2.addEventListener("blocked", async function() {
resolve();
}, {once: true});
});
}
async function audioContextsShouldBeBlocked() {
await ac1.notAllowedToStart;
await ac2.notAllowedToStart;
is(ac1.state, "suspended", `AudioContext1 is blocked.`);
is(ac2.state, "suspended", `AudioContext2 is blocked.`);
}
async function startAudioContext1() {
// simulate user gesture in order to start video.
SpecialPowers.wrap(document).notifyUserGestureActivation();
ok(await ac1.resume().then(() => true, () => false), `resumed AudioContext1.`);
await ac1.allowedToStart;
is(ac1.state, "running", `AudioContext1 is running.`);
}
async function getActiveStream() {
await startAudioContext1();
// As AudioContext1 has been resumed, we can use it to create active stream.
return ac1.createMediaStreamDestination().stream;
}
async function createMediaStreamAudioSourceByAudioContext2() {
is(ac2.state, "suspended", `AudioContext2 is suspended.`);
let source = ac2.createMediaStreamSource(await getActiveStream());
source.connect(ac2.destination);
await ac2.allowedToStart;
is(ac2.state, "running", `AudioContext2 is running.`);
}
function endTest() {
// reset the activation flag in order not to interfere following test in the
// verify mode which would run the test using same document couple times.
SpecialPowers.wrap(document).clearUserGestureActivation();
SimpleTest.finish();
}
</script>
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