rtp-extension-support.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webrtc/protocol/rtp-extension-support.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>RTCPeerConnection RTP extensions</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="../third_party/sdp/sdp.js"></script>

<script>

'use strict';

async function setup() {

  const pc1 = new RTCPeerConnection();

  pc1.addTransceiver('audio');

  // Make sure there is more than one rid, since there's no reason to use

  // rtp-stream-id/repaired-rtp-stream-id otherwise. Some implementations

  // may use them for unicast anyway, which isn't a spec violation, just

  // a little silly.

  pc1.addTransceiver('video', {sendEncodings: [{rid: '0'}, {rid: '1'}]});

  const offer = await pc1.createOffer();

  pc1.close();

  return offer.sdp;

// Extensions that MUST be supported

const mandatoryExtensions = [

  // Directly referenced in WebRTC RTP usage

  'urn:ietf:params:rtp-hdrext:ssrc-audio-level', // RFC 8834 5.2.2

  'urn:ietf:params:rtp-hdrext:sdes:mid',  // RFC 8834 5.2.4

  'urn:3gpp:video-orientation',  // RFC 8834 5.2.5

  // Required for support of simulcast with RID

  'urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id',  // RFC 8852 4.3

  'urn:ietf:params:rtp-hdrext:sdes:repaired-rtp-stream-id',  // RFC 8852 4.4

];

// For further testing:

// - Add test for rapid synchronization - RFC 8834 5.2.1

// - Add test for encrypted header extensions (RFC 6904)

// - Separate tests for extensions in audio and video sections

for (const extension of mandatoryExtensions) {

  promise_test(async t => {

    const sdp = await setup();

    const extensions = SDPUtils.matchPrefix(sdp, 'a=extmap:')

          .map(SDPUtils.parseExtmap);

    assert_true(!!extensions.find(ext => ext.uri === extension));

  }, `RTP header extension ${extension} is present in offer`);

// Test for illegal remote behavior: Reassignment of hdrext ID

// in a subsequent offer/answer cycle.

promise_test(async t => {

  const pc1 = new RTCPeerConnection();

  t.add_cleanup(() => pc1.close());

  const pc2 = new RTCPeerConnection();

  t.add_cleanup(() => pc2.close());

  pc1.addTransceiver('audio');

  await pc1.setLocalDescription();

  await pc2.setRemoteDescription(pc1.localDescription);

  await pc2.setLocalDescription();

  await pc1.setRemoteDescription(pc2.localDescription);

  // Do a second offer/answer cycle.

  await pc1.setLocalDescription();

  await pc2.setRemoteDescription(pc1.localDescription);

  const answer = await pc2.createAnswer();

  // Swap the extension number of the two required extensions

  answer.sdp = answer.sdp.replace('urn:ietf:params:rtp-hdrext:ssrc-audio-level',

                     'xyzzy')

  .replace('urn:ietf:params:rtp-hdrext:sdes:mid',

           'urn:ietf:params:rtp-hdrext:ssrc-audio-level')

  .replace('xyzzy',

           'urn:ietf:params:rtp-hdrext:sdes:mid');

  return promise_rejects_dom(t, 'InvalidAccessError',

                            pc1.setRemoteDescription(answer));

}, 'RTP header extension reassignment causes failure');

</script>