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<title>RTCRtpReceiver.prototype.getParameters</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="dictionary-helper.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script src="RTCRtpParameters-helper.js"></script>
<script>
'use strict';
// Test is based on the following editor draft:
// https://w3c.github.io/webrtc-pc/archives/20170605/webrtc.html
// The following helper functions are called from RTCRtpParameters-helper.js:
// validateReceiverRtpParameters
/*
Validates the RTCRtpParameters returned from RTCRtpReceiver.prototype.getParameters
5.3. RTCRtpReceiver Interface
getParameters
When getParameters is called, the RTCRtpParameters dictionary is constructed
as follows:
- The headerExtensions sequence is populated based on the header extensions that
the receiver is currently prepared to receive.
- The codecs sequence is populated based on the codecs that the receiver is currently
prepared to receive.
- rtcp.reducedSize is set to true if the receiver is currently prepared to receive
reduced-size RTCP packets, and false otherwise. rtcp.cname is left undefined.
*/
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('audio');
const callee = await doOfferAnswerExchange(t, pc);
const param = callee.getTransceivers()[0].receiver.getParameters();
validateReceiverRtpParameters(param);
assert_greater_than(param.headerExtensions.length, 0);
assert_greater_than(param.codecs.length, 0);
}, 'getParameters() with audio receiver');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('video');
const callee = await doOfferAnswerExchange(t, pc);
const param = callee.getTransceivers()[0].receiver.getParameters();
validateReceiverRtpParameters(param);
assert_greater_than(param.headerExtensions.length, 0);
assert_greater_than(param.codecs.length, 0);
}, 'getParameters() with video receiver');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
pc.addTransceiver('video', {
sendEncodings: [
{ rid: "rid1" },
{ rid: "rid2" }
]
});
const callee = await doOfferAnswerExchange(t, pc);
const param = callee.getTransceivers()[0].receiver.getParameters();
validateReceiverRtpParameters(param);
assert_greater_than(param.headerExtensions.length, 0);
assert_greater_than(param.codecs.length, 0);
}, 'getParameters() with simulcast video receiver');
promise_test(async t => {
const stream = await getNoiseStream({video: true});
t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
const [track] = stream.getTracks();
const caller = new RTCPeerConnection();
t.add_cleanup(() => caller.close());
caller.addTrack(track);
const callee = new RTCPeerConnection();
t.add_cleanup(() => callee.close());
callee.addTrack(track);
var callerReceiver = caller.getTransceivers()[0].receiver;
assert_equals(callerReceiver.getParameters().codecs.length, 0);
const offer = await caller.createOffer();
await caller.setLocalDescription(offer);
await callee.setRemoteDescription(offer);
var calleeReceiver = callee.getTransceivers()[0].receiver;
assert_equals(calleeReceiver.getParameters().codecs.length, 0);
const answer = await callee.createAnswer();
await callee.setLocalDescription(answer);
assert_greater_than(calleeReceiver.getParameters().codecs.length, 0,
"callee codecs after answer");
await caller.setRemoteDescription(answer);
assert_greater_than(callerReceiver.getParameters().codecs.length, 0,
"caller codecs after answer");
}, 'getParameters() surfaces codecs on two-way receiver at the right time');
</script>
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