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<!doctype html>
<meta charset=utf-8>
<title>RTCRtpParameters degradationPreference</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="dictionary-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:
// validateSenderRtpParameters
/*
5.2. RTCRtpSender Interface
interface RTCRtpSender {
Promise<void> setParameters(optional RTCRtpParameters parameters);
RTCRtpParameters getParameters();
};
dictionary RTCRtpParameters {
DOMString transactionId;
sequence<RTCRtpEncodingParameters> encodings;
sequence<RTCRtpHeaderExtensionParameters> headerExtensions;
RTCRtcpParameters rtcp;
sequence<RTCRtpCodecParameters> codecs;
RTCDegradationPreference degradationPreference;
};
enum RTCDegradationPreference {
"maintain-framerate",
"maintain-resolution",
"balanced"
};
- degradationPreference is set to the last value passed into setParameters,
or the default value of "balanced" if setParameters hasn't been called.
*/
promise_test(t => {
const pc = new RTCPeerConnection();
const { sender } = pc.addTransceiver('audio');
const param = sender.getParameters();
validateSenderRtpParameters(param);
assert_equals(param.degradationPreference, 'balanced',
'Expect initial param.degradationPreference to be balanced');
param.degradationPreference = 'maintain-framerate';
return pc.setParameters(param)
.then(() => {
const param = sender.getParameters();
validateSenderRtpParameters(param);
assert_equals(param.degradationPreference, 'maintain-framerate');
});
}, 'setParameters with degradationPreference set should succeed');
promise_test(t => {
const pc = new RTCPeerConnection();
const { sender } = pc.addTransceiver('audio');
const param = sender.getParameters();
validateSenderRtpParameters(param);
assert_equals(param.degradationPreference, 'balanced',
'Expect initial param.degradationPreference to be balanced');
param.degradationPreference = undefined;
return pc.setParameters(param)
.then(() => {
const param = sender.getParameters();
validateSenderRtpParameters(param);
assert_equals(param.degradationPreference, undefined);
});
}, 'setParameters with degradationPreference unset should succeed');
</script>
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