102 lines
3.7 KiB
HTML
102 lines
3.7 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>RTCPeerConnection Simulcast Answer</title>
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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>
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'use strict';
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const offer_sdp = `v=0
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o=- 3840232462471583827 2 IN IP4 127.0.0.1
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s=-
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t=0 0
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a=group:BUNDLE 0
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a=msid-semantic: WMS
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m=video 9 UDP/TLS/RTP/SAVPF 96
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c=IN IP4 0.0.0.0
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a=rtcp:9 IN IP4 0.0.0.0
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a=ice-ufrag:Li6+
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a=ice-pwd:3C05CTZBRQVmGCAq7hVasHlT
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a=ice-options:trickle
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a=fingerprint:sha-256 5B:D3:8E:66:0E:7D:D3:F3:8E:E6:80:28:19:FC:55:AD:58:5D:B9:3D:A8:DE:45:4A:E7:87:02:F8:3C:0B:3B:B3
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a=setup:actpass
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a=mid:0
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a=extmap:1 urn:ietf:params:rtp-hdrext:sdes:mid
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a=extmap:2 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
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a=recvonly
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a=rtcp-mux
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a=rtpmap:96 VP8/90000
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a=rtcp-fb:96 goog-remb
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a=rtcp-fb:96 transport-cc
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a=rtcp-fb:96 ccm fir
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a=rid:foo recv
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a=rid:bar recv
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a=rid:baz recv
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a=simulcast:recv foo;bar;baz
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`;
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// Tests for the construction of answers with simulcast according to:
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// draft-ietf-mmusic-sdp-simulcast-13
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// draft-ietf-mmusic-rid-15
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promise_test(async t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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const expected_rids = ['foo', 'bar', 'baz'];
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await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp});
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const transceiver = pc.getTransceivers()[0];
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// The created transceiver should be in "recvonly" state. Allow it to send.
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transceiver.direction = 'sendonly';
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const answer = await pc.createAnswer();
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const answer_lines = answer.sdp.split('\r\n');
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// Check for a RID line for each layer.
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for (const rid of expected_rids) {
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const result = answer_lines.find(line => line.startsWith(`a=rid:${rid}`));
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assert_not_equals(result, undefined, `RID attribute for '${rid}' missing.`);
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}
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// Check for simulcast attribute with send direction and all RIDs.
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const result = answer_lines.find(
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line => line.startsWith(`a=simulcast:send ${expected_rids.join(';')}`));
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assert_not_equals(result, undefined, 'Could not find simulcast attribute.');
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}, 'createAnswer() with multiple send encodings should create simulcast answer');
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promise_test(async t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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const expected_rids = ['foo', 'bar', 'baz'];
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// Try to disable the `bar` encoding in a=simulcast by prefixing it with the
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// `~` character.
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await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp.replace(/(a=simulcast:.*)bar/, '$1~bar')});
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const transceiver = pc.getTransceivers()[0];
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transceiver.direction = 'sendonly';
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await pc.setLocalDescription();
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const parameters = pc.getSenders()[0].getParameters();
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const barEncoding = parameters.encodings.find(encoding => encoding.rid === 'bar');
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assert_not_equals(barEncoding, undefined);
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assert_not_equals(barEncoding.active, false);
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}, 'Using the ~rid SDP syntax in a remote offer does not control the local encodings active flag');
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promise_test(async t => {
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const pc = new RTCPeerConnection();
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t.add_cleanup(() => pc.close());
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const expected_rids = ['foo', 'bar', 'baz'];
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await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp});
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const transceiver = pc.getTransceivers()[0];
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transceiver.direction = 'sendonly';
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await pc.setLocalDescription();
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// Disabling the encoding should not change the rid to ~rid.
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const parameters = pc.getSenders()[0].getParameters();
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parameters.encodings.forEach(e => e.active = false);
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await pc.getSenders()[0].setParameters(parameters);
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const offer = await pc.createOffer();
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const offer_lines = offer.sdp.split('\r\n');
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const result = offer_lines.find(
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line => line.startsWith(`a=simulcast:send ${expected_rids.join(';')}`));
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assert_not_equals(result, undefined, 'Could not find simulcast attribute.');
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}, 'Disabling encodings locally does not change the SDP');
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</script>
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