| <!doctype html> |
| <meta charset=utf-8> |
| <title>RTX codec integrity checks</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../RTCPeerConnection-helper.js"></script> |
| <script src="../third_party/sdp/sdp.js"></script> |
| <script> |
| 'use strict'; |
| |
| // Tests for conformance to rules for RTX codecs. |
| // Basic rule: Offers and answers must contain RTX codecs, and the |
| // RTX codecs must have an a=fmtp line that points to a non-RTX codec. |
| |
| // Helper function for doing one round of offer/answer exchange |
| // between two local peer connections. |
| // Calls setRemoteDescription(offer/answer) before |
| // setLocalDescription(offer/answer) to ensure the remote description |
| // is set and candidates can be added before the local peer connection |
| // starts generating candidates and ICE checks. |
| async function doSignalingHandshake(localPc, remotePc, options={}) { |
| let offer = await localPc.createOffer(); |
| // Modify offer if callback has been provided |
| if (options.modifyOffer) { |
| offer = await options.modifyOffer(offer); |
| } |
| |
| // Apply offer. |
| await remotePc.setRemoteDescription(offer); |
| await localPc.setLocalDescription(offer); |
| |
| let answer = await remotePc.createAnswer(); |
| // Modify answer if callback has been provided |
| if (options.modifyAnswer) { |
| answer = await options.modifyAnswer(answer); |
| } |
| |
| // Apply answer. |
| await localPc.setRemoteDescription(answer); |
| await remotePc.setLocalDescription(answer); |
| } |
| |
| function verifyRtxReferences(description) { |
| const mediaSection = SDPUtils.getMediaSections(description.sdp)[0]; |
| const rtpParameters = SDPUtils.parseRtpParameters(mediaSection); |
| for (const codec of rtpParameters.codecs) { |
| if (codec.name === 'rtx') { |
| assert_own_property(codec.parameters, 'apt', 'rtx codec has apt parameter'); |
| const referenced_codec = rtpParameters.codecs.find( |
| c => c.payloadType === parseInt(codec.parameters.apt)); |
| assert_true(referenced_codec !== undefined, `Found referenced codec`); |
| } |
| } |
| } |
| |
| |
| |
| promise_test(async t => { |
| const pc = new RTCPeerConnection(); |
| const offer = await generateVideoReceiveOnlyOffer(pc); |
| verifyRtxReferences(offer); |
| }, 'Initial offer should have sensible RTX mappings'); |
| |
| async function negotiateAndReturnAnswer(t) { |
| const pc1 = new RTCPeerConnection(); |
| const pc2 = new RTCPeerConnection(); |
| t.add_cleanup(() => pc1.close()); |
| t.add_cleanup(() => pc2.close()); |
| let [track, streams] = await getTrackFromUserMedia('video'); |
| const sender = pc1.addTrack(track); |
| await doSignalingHandshake(pc1, pc2); |
| return pc2.localDescription; |
| } |
| |
| promise_test(async t => { |
| const answer = await negotiateAndReturnAnswer(t); |
| verifyRtxReferences(answer); |
| }, 'Self-negotiated answer should have sensible RTX parameters'); |
| |
| promise_test(async t => { |
| const sampleOffer = `v=0 |
| o=- 1878890426675213188 2 IN IP4 127.0.0.1 |
| s=- |
| t=0 0 |
| a=group:BUNDLE video |
| a=msid-semantic: WMS |
| m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 |
| c=IN IP4 0.0.0.0 |
| a=rtcp:9 IN IP4 0.0.0.0 |
| a=ice-ufrag:RGPK |
| a=ice-pwd:rAyHEAKC7ckxQgWaRZXukz+Z |
| a=ice-options:trickle |
| a=fingerprint:sha-256 8C:29:0A:8F:11:06:BF:1C:58:B3:CA:E6:F1:F1:DC:99:4C:6C:89:E9:FF:BC:D4:38:11:18:1F:40:19:C8:49:37 |
| a=setup:actpass |
| a=mid:video |
| a=recvonly |
| a=rtcp-mux |
| a=rtpmap:97 rtx/90000 |
| a=fmtp:97 apt=98 |
| a=rtpmap:98 VP8/90000 |
| a=rtcp-fb:98 ccm fir |
| a=rtcp-fb:98 nack |
| a=rtcp-fb:98 nack pli |
| a=rtcp-fb:98 goog-remb |
| a=rtcp-fb:98 transport-cc |
| `; |
| const pc = new RTCPeerConnection(); |
| let [track, streams] = await getTrackFromUserMedia('video'); |
| const sender = pc.addTrack(track); |
| await pc.setRemoteDescription({type: 'offer', sdp: sampleOffer}); |
| const answer = await pc.createAnswer(); |
| verifyRtxReferences(answer); |
| }, 'A remote offer generates sensible RTX references in answer'); |
| |
| promise_test(async t => { |
| const sampleOffer = `v=0 |
| o=- 1878890426675213188 2 IN IP4 127.0.0.1 |
| s=- |
| t=0 0 |
| a=group:BUNDLE video |
| a=msid-semantic: WMS |
| m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 |
| c=IN IP4 0.0.0.0 |
| a=rtcp:9 IN IP4 0.0.0.0 |
| a=ice-ufrag:RGPK |
| a=ice-pwd:rAyHEAKC7ckxQgWaRZXukz+Z |
| a=ice-options:trickle |
| a=fingerprint:sha-256 8C:29:0A:8F:11:06:BF:1C:58:B3:CA:E6:F1:F1:DC:99:4C:6C:89:E9:FF:BC:D4:38:11:18:1F:40:19:C8:49:37 |
| a=setup:actpass |
| a=mid:video |
| a=recvonly |
| a=rtcp-mux |
| a=rtpmap:96 VP8/90000 |
| a=rtpmap:97 rtx/90000 |
| a=fmtp:97 apt=98 |
| a=rtpmap:98 VP8/90000 |
| a=rtcp-fb:98 ccm fir |
| a=rtcp-fb:98 nack |
| a=rtcp-fb:98 nack pli |
| a=rtcp-fb:98 goog-remb |
| a=rtcp-fb:98 transport-cc |
| a=rtpmap:99 rtx/90000 |
| a=fmtp:99 apt=96 |
| `; |
| const pc = new RTCPeerConnection(); |
| let [track, streams] = await getTrackFromUserMedia('video'); |
| const sender = pc.addTrack(track); |
| await pc.setRemoteDescription({type: 'offer', sdp: sampleOffer}); |
| const answer = await pc.createAnswer(); |
| verifyRtxReferences(answer); |
| }, 'A remote offer with duplicate codecs generates sensible RTX references in answer'); |
| |
| </script> |
