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<!doctype html>
<meta charset=utf-8>
<!-- This file contains two tests that wait for 10 seconds each. -->
<meta name="timeout" content="long">
<title>RTCRtpReceiver.prototype.getSynchronizationSources</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
async function initiateSingleTrackCallAndReturnReceiver(t, kind) {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const stream = await getNoiseStream({[kind]:true});
const [track] = stream.getTracks();
t.add_cleanup(() => track.stop());
pc1.addTrack(track, stream);
exchangeIceCandidates(pc1, pc2);
const trackEvent = await exchangeOfferAndListenToOntrack(t, pc1, pc2);
await exchangeAnswer(pc1, pc2);
// Some browsers might need an audio element attached to the DOM.
const element = document.createElement(kind);
element.autoplay = true;
element.srcObject = trackEvent.streams[0];
document.body.appendChild(element);
t.add_cleanup(() => { document.body.removeChild(element) });
return trackEvent.receiver;
}
for (const kind of ['audio', 'video']) {
promise_test(async t => {
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
await listenForSSRCs(t, receiver);
}, '[' + kind + '] getSynchronizationSources() eventually returns a ' +
'non-empty list');
promise_test(async t => {
const startTime = performance.now();
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
const [ssrc] = await listenForSSRCs(t, receiver);
assert_equals(typeof ssrc.timestamp, 'number');
assert_true(ssrc.timestamp >= startTime);
}, '[' + kind + '] RTCRtpSynchronizationSource.timestamp is a number');
promise_test(async t => {
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
const [ssrc] = await listenForSSRCs(t, receiver);
assert_equals(typeof ssrc.rtpTimestamp, 'number');
assert_greater_than_equal(ssrc.rtpTimestamp, 0);
assert_less_than_equal(ssrc.rtpTimestamp, 0xffffffff);
}, '[' + kind + '] RTCRtpSynchronizationSource.rtpTimestamp is a number ' +
'[0, 2^32-1]');
promise_test(async t => {
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
// Wait for packets to start flowing.
await listenForSSRCs(t, receiver);
// Wait for 10 seconds.
await new Promise(resolve => t.step_timeout(resolve, 10000));
let earliestTimestamp = undefined;
let latestTimestamp = undefined;
for (const ssrc of await listenForSSRCs(t, receiver)) {
if (earliestTimestamp == undefined || earliestTimestamp > ssrc.timestamp)
earliestTimestamp = ssrc.timestamp;
if (latestTimestamp == undefined || latestTimestamp < ssrc.timestamp)
latestTimestamp = ssrc.timestamp;
}
assert_true(latestTimestamp - earliestTimestamp <= 10000);
}, '[' + kind + '] getSynchronizationSources() does not contain SSRCs ' +
'older than 10 seconds');
promise_test(async t => {
const startTime = performance.timeOrigin + performance.now();
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
const [ssrc] = await listenForSSRCs(t, receiver);
const endTime = performance.timeOrigin + performance.now();
assert_true(startTime <= ssrc.timestamp && ssrc.timestamp <= endTime);
}, '[' + kind + '] RTCRtpSynchronizationSource.timestamp is comparable to ' +
'performance.timeOrigin + performance.now()');
promise_test(async t => {
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, kind);
const [ssrc] = await listenForSSRCs(t, receiver);
assert_equals(typeof ssrc.source, 'number');
}, '[' + kind + '] RTCRtpSynchronizationSource.source is a number');
}
promise_test(async t => {
const receiver = await initiateSingleTrackCallAndReturnReceiver(t, 'audio');
const [ssrc] = await listenForSSRCs(t, receiver);
assert_equals(typeof ssrc.audioLevel, 'number');
assert_greater_than_equal(ssrc.audioLevel, 0);
assert_less_than_equal(ssrc.audioLevel, 1);
}, '[audio-only] RTCRtpSynchronizationSource.audioLevel is a number [0, 1]');
</script>
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