56 lines
2 KiB
HTML
56 lines
2 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>Send additional codec supported by the other side</title>
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<meta name=timeout content=long>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="../RTCPeerConnection-helper.js"></script>
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<script>
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'use strict';
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// Tests behaviour from
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// https://www.rfc-editor.org/rfc/rfc8829.html#section-5.3.1
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// in particular "but MAY include formats that are locally
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// supported but not present in the offer"
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promise_test(async t => {
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const pc1 = new RTCPeerConnection();
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t.add_cleanup(() => pc1.close());
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const pc2 = new RTCPeerConnection();
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t.add_cleanup(() => pc2.close());
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exchangeIceCandidates(pc1, pc2);
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const stream = await getNoiseStream({video: true});
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t.add_cleanup(() => stream.getTracks().forEach(t => t.stop()));
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pc1.addTrack(stream.getTracks()[0], stream);
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pc2.addTrack(stream.getTracks()[0], stream);
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// Only offer VP8.
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pc1.getTransceivers()[0].setCodecPreferences([{
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clockRate: 90000,
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mimeType: 'video/VP8'
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}]);
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await pc1.setLocalDescription();
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// Add H264 to the SDP.
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const sdp = pc1.localDescription.sdp.split('\n')
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.map(l => {
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if (l.startsWith('m=')) {
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return l.trim() + ' 63'; // 63 is the least-likely to be used PT.
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}
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return l.trim();
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}).join('\r\n') +
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'a=rtpmap:63 H264/90000\r\n' +
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'a=fmtp:63 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f\r\n'
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await pc2.setRemoteDescription({
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type: 'offer',
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sdp: sdp.replaceAll('VP8', 'no-such-codec'), // Remove VP8
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});
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await pc2.setLocalDescription();
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await pc1.setRemoteDescription(pc2.localDescription);
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await listenToConnected(pc2);
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const stats = await pc1.getStats();
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const rtp = [...stats.values()].find(({type}) => type === 'outbound-rtp');
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assert_true(!!rtp);
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assert_equals(stats.get(rtp.codecId).mimeType, 'video/H264');
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}, 'Listing an additional codec in the answer causes it to be sent.');
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</script>
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