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<!doctype html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title>RTCRtpParameters encodings</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webrtc/dictionary-helper.js"></script>
<script src="/webrtc/RTCRtpParameters-helper.js"></script>
<script src="../webrtc/RTCPeerConnection-helper.js"></script>
<script>
'use strict';
// Test is based on the following editor draft:
// https://w3c.github.io/webrtc-svc/
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const { sender } = pc.addTransceiver('video', {
sendEncodings: [{scalabilityMode: 'L1T3'}],
});
const param = sender.getParameters();
const encoding = param.encodings[0];
assert_equals(encoding.scalabilityMode, 'L1T3');
encoding.scalabilityMode = 'L1T2';
await sender.setParameters(param);
const updatedParam = sender.getParameters();
const updatedEncoding = updatedParam.encodings[0];
assert_equals(updatedEncoding.scalabilityMode, 'L1T2');
}, `Setting and updating scalabilityMode to a legal value should be accepted`);
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const { sender } = pc.addTransceiver('video');
const param = sender.getParameters();
const encoding = param.encodings[0];
assert_true(!('scalabilityMode' in encoding));
}, 'Not setting sendEncodings results in no mode info before negotiation');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const { sender } = pc.addTransceiver('video', {
sendEncodings: [{}],
});
const param = sender.getParameters();
const encoding = param.encodings[0];
assert_true(!('scalabilityMode' in encoding));
}, 'Not setting a scalability mode results in no mode set before negotiation');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
assert_throws_dom('OperationError', () => {
pc.addTransceiver('video', {
sendEncodings: [{scalabilityMode: 'TotalNonsense'}],
});
});
}, 'Setting a scalability mode to nonsense throws an exception');
promise_test(async t => {
const v = document.createElement('video');
v.autoplay = true;
const pc1 = new RTCPeerConnection();
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
t.add_cleanup(() => pc2.close());
const transceiver = pc1.addTransceiver('video', {
sendEncodings: [{ scalabilityMode: 'L3T3' }],
});
// Before negotiation, the mode should be preserved.
const param = transceiver.sender.getParameters();
const encoding = param.encodings[0];
assert_true('scalabilityMode' in encoding);
// If L3T3 is not supported at all, abort test.
assert_implements_optional(encoding.scalabilityMode === 'L3T3');
// Pick a codec known to not have L3T3 support
const capabilities = RTCRtpSender.getCapabilities('video');
const codec = capabilities.codecs.find(c => c.mimeType === 'video/VP8');
assert_true(codec !== undefined);
transceiver.setCodecPreferences([codec]);
exchangeIceCandidates(pc1, pc2);
await exchangeOfferAnswer(pc1, pc2);
const sendParams = pc1.getSenders()[0].getParameters();
assert_not_equals(sendParams.encodings[0].scalabilityMode, 'L3T3');
}, 'L3T3 on VP8 should return something other than L3T3');
</script>
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