1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection Simulcast Answer</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
const offer_sdp = `v=0
o=- 3840232462471583827 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE 0
a=msid-semantic: WMS
m=video 9 UDP/TLS/RTP/SAVPF 96
c=IN IP4 0.0.0.0
a=rtcp:9 IN IP4 0.0.0.0
a=ice-ufrag:Li6+
a=ice-pwd:3C05CTZBRQVmGCAq7hVasHlT
a=ice-options:trickle
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
a=setup:actpass
a=mid:0
a=extmap:4 urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id
a=recvonly
a=rtcp-mux
a=rtpmap:96 VP8/90000
a=rtcp-fb:96 goog-remb
a=rtcp-fb:96 transport-cc
a=rtcp-fb:96 ccm fir
a=rid:foo recv
a=rid:bar recv
a=rid:baz recv
a=simulcast:recv foo;bar;baz
`;
// Tests for the construction of answers with simulcast according to:
// draft-ietf-mmusic-sdp-simulcast-13
// draft-ietf-mmusic-rid-15
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const expected_rids = ['foo', 'bar', 'baz'];
await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp});
const transceiver = pc.getTransceivers()[0];
// The created transceiver should be in "recvonly" state. Allow it to send.
transceiver.direction = 'sendonly';
const answer = await pc.createAnswer();
const answer_lines = answer.sdp.split('\r\n');
// Check for a RID line for each layer.
for (const rid of expected_rids) {
const result = answer_lines.find(line => line.startsWith(`a=rid:${rid}`));
assert_not_equals(result, undefined, `RID attribute for '${rid}' missing.`);
}
// Check for simulcast attribute with send direction and all RIDs.
const result = answer_lines.find(
line => line.startsWith(`a=simulcast:send ${expected_rids.join(';')}`));
assert_not_equals(result, undefined, 'Could not find simulcast attribute.');
}, 'createAnswer() with multiple send encodings should create simulcast answer');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const expected_rids = ['foo', 'bar', 'baz'];
// Try to disable the `bar` encoding in a=simulcast by prefixing it with the
// `~` character.
await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp.replace(/(a=simulcast:.*)bar/, '$1~bar')});
const transceiver = pc.getTransceivers()[0];
transceiver.direction = 'sendonly';
await pc.setLocalDescription();
const parameters = pc.getSenders()[0].getParameters();
const barEncoding = parameters.encodings.find(encoding => encoding.rid === 'bar');
assert_not_equals(barEncoding, undefined);
assert_not_equals(barEncoding.active, false);
}, 'Using the ~rid SDP syntax in a remote offer does not control the local encodings active flag');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const expected_rids = ['foo', 'bar', 'baz'];
await pc.setRemoteDescription({type: 'offer', sdp: offer_sdp});
const transceiver = pc.getTransceivers()[0];
transceiver.direction = 'sendonly';
await pc.setLocalDescription();
// Disabling the encoding should not change the rid to ~rid.
const parameters = pc.getSenders()[0].getParameters();
parameters.encodings.forEach(e => e.active = false);
await pc.getSenders()[0].setParameters(parameters);
const offer = await pc.createOffer();
const offer_lines = offer.sdp.split('\r\n');
const result = offer_lines.find(
line => line.startsWith(`a=simulcast:send ${expected_rids.join(';')}`));
assert_not_equals(result, undefined, 'Could not find simulcast attribute.');
}, 'Disabling encodings locally does not change the SDP');
</script>
|
