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<!doctype html>
<meta charset=utf-8>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../third_party/sdp/sdp.js"></script>
<script>
'use strict';
promise_test(async t => {
const av1SendCodec = RTCRtpSender.getCapabilities('video').codecs.find(
codec => codec.mimeType == 'video/AV1');
assert_not_equals(av1SendCodec, undefined);
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const transceiver = pc1.addTransceiver('video');
transceiver.setCodecPreferences([av1SendCodec]);
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
// Modify the profile ID of `av1SendCodec` to ensure a strict codec comparison
// matcher would no longer consider them the same.
const sdpFmtpMap = SDPUtils.parseFmtp(av1SendCodec.sdpFmtpLine);
const profileId = Number(sdpFmtpMap['profile']);
av1SendCodec.sdpFmtpLine =
av1SendCodec.sdpFmtpLine.replace(`profile=${profileId}`,
`profile=${profileId + 1}`);
const sender = transceiver.sender;
let params = sender.getParameters();
params.encodings[0].codec = av1SendCodec;
// Set parameters should not reject because the codec dictionary match
// algorithm[1] is able to ignore asymmetrical parameters such as AV1's
// `profile` parameter, see [2].
//
// [1] https://w3c.github.io/webrtc-pc/#dfn-codec-dictionary-match
// [2] https://aomediacodec.github.io/av1-rtp-spec/#723-usage-with-the-sdp-offeranswer-model
await sender.setParameters(params);
// getParameters() returns `av1SendCodec` now.
params = sender.getParameters();
assert_equals(params.encodings[0].codec.mimeType, 'video/AV1');
assert_equals(params.encodings[0].codec.sdpFmtpLine,
av1SendCodec.sdpFmtpLine);
}, `setParameters() ignores the asymmetrical AV1 parameter 'profile'`);
</script>
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