<!doctype html>
<meta charset=utf-8>
<title>RTCRtpParameters encodings</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webrtc/dictionary-helper.js"></script>
<script src="/webrtc/RTCRtpParameters-helper.js"></script>
<script src="/webrtc/third_party/sdp/sdp.js"></script>
<script>
'use strict';
async function negotiate(pc1, pc2) {
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
}
['audio', 'video'].forEach(kind => {
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver(kind);
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const capability = capabilities.find((capability) => {
return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
assert_not_equals(capability, undefined);
assert_equals(capability.direction, 'sendrecv');
}, `the ${kind} transceiver.getHeaderExtensionsToNegotiate() includes mandatory extensions`);
});
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('audio');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
capabilities[0].uri = '';
assert_throws_js(TypeError, () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, 'transceiver should throw TypeError when setting an empty URI');
}, `setHeaderExtensionsToNegotiate throws TypeError on encountering missing URI`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('audio');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
capabilities[0].direction = '';
assert_throws_js(TypeError, () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, 'transceiver should throw TypeError when setting an empty direction');
}, `setHeaderExtensionsToNegotiate throws TypeError on encountering missing direction`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('audio');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
capabilities[0].uri = '4711';
assert_throws_dom('InvalidModificationError', () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, 'transceiver should throw InvalidModificationError when setting an unknown URI');
}, `setHeaderExtensionsToNegotiate throws InvalidModificationError on encountering unknown URI`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate().filter(capability => {
return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
assert_throws_dom('InvalidModificationError', () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, 'transceiver should throw InvalidModificationError when removing elements from the list');
}, `setHeaderExtensionsToNegotiate throws InvalidModificationError when removing elements from the list`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
capabilities.push({
uri: '4711',
direction: 'recvonly',
});
assert_throws_dom('InvalidModificationError', () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, 'transceiver should throw InvalidModificationError when adding elements to the list');
}, `setHeaderExtensionsToNegotiate throws InvalidModificationError when adding elements to the list`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('audio');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const capability = capabilities.find((capability) => {
return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
['sendonly', 'recvonly', 'inactive', 'stopped'].map(direction => {
capability.direction = direction;
assert_throws_dom('InvalidModificationError', () => {
transceiver.setHeaderExtensionsToNegotiate(capabilities);
}, `transceiver should throw InvalidModificationError when setting a mandatory header extension\'s direction to ${direction}`);
});
}, `setHeaderExtensionsToNegotiate throws InvalidModificationError when setting a mandatory header extension\'s direction to something else than "sendrecv"`);
test(t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('audio');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
const offered_capabilities = transceiver.getHeaderExtensionsToNegotiate();
const altered_capability = capabilities.find((capability) => {
return capability.uri === selected_capability.uri &&
capability.direction === 'stopped';
});
assert_not_equals(altered_capability, undefined);
}, `modified direction set by setHeaderExtensionsToNegotiate is visible in subsequent getHeaderExtensionsToNegotiate`);
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const offer = await pc.createOffer();
const extensions = SDPUtils.matchPrefix(SDPUtils.splitSections(offer.sdp)[1], 'a=extmap:')
.map(line => SDPUtils.parseExtmap(line));
for (const capability of capabilities) {
if (capability.direction === 'stopped') {
assert_equals(undefined, extensions.find(e => e.uri === capability.uri));
} else {
assert_not_equals(undefined, extensions.find(e => e.uri === capability.uri));
}
}
}, `Unstopped extensions turn up in offer`);
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
transceiver.setHeaderExtensionsToNegotiate(capabilities);
const offer = await pc.createOffer();
const extensions = SDPUtils.matchPrefix(SDPUtils.splitSections(offer.sdp)[1], 'a=extmap:')
.map(line => SDPUtils.parseExtmap(line));
for (const capability of capabilities) {
if (capability.direction === 'stopped') {
assert_equals(undefined, extensions.find(e => e.uri === capability.uri));
} else {
assert_not_equals(undefined, extensions.find(e => e.uri === capability.uri));
}
}
}, `Stopped extensions do not turn up in offers`);
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
// Disable a non-mandatory extension before first negotiation.
const transceiver = pc1.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
transceiver.setHeaderExtensionsToNegotiate(capabilities);
await negotiate(pc1, pc2);
const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
assert_equals(capabilities.length, negotiated_capabilites.length);
}, `The set of negotiated extensions has the same size as the set of extensions to negotiate`);
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
// Disable a non-mandatory extension before first negotiation.
const transceiver = pc1.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
transceiver.setHeaderExtensionsToNegotiate(capabilities);
await negotiate(pc1, pc2);
const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
// Attempt enabling the extension.
selected_capability.direction = 'sendrecv';
// The enabled extension should not be part of the negotiated set.
transceiver.setHeaderExtensionsToNegotiate(capabilities);
await negotiate(pc1, pc2);
assert_not_equals(
transceiver.getNegotiatedHeaderExtensions().find(capability => {
return capability.uri === selected_capability.uri &&
capability.direction === 'sendrecv';
}), undefined);
}, `Header extensions can be reactivated in subsequent offers`);
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const t1 = pc.addTransceiver('video');
const t2 = pc.addTransceiver('video');
const extensionUri = 'urn:3gpp:video-orientation';
assert_true(!!t1.getHeaderExtensionsToNegotiate().find(ext => ext.uri === extensionUri));
const ext1 = t1.getHeaderExtensionsToNegotiate();
ext1.find(ext => ext.uri === extensionUri).direction = 'stopped';
t1.setHeaderExtensionsToNegotiate(ext1);
assert_true(!!t2.getHeaderExtensionsToNegotiate().find(ext => ext.uri === extensionUri));
const ext2 = t2.getHeaderExtensionsToNegotiate();
ext2.find(ext => ext.uri === extensionUri).direction = 'sendrecv';
t2.setHeaderExtensionsToNegotiate(ext2);
const offer = await pc.createOffer();
const sections = SDPUtils.splitSections(offer.sdp);
sections.shift();
const extensions = sections.map(section => {
return SDPUtils.matchPrefix(section, 'a=extmap:')
.map(SDPUtils.parseExtmap);
});
assert_equals(extensions.length, 2);
assert_false(!!extensions[0].find(extension => extension.uri === extensionUri));
assert_true(!!extensions[1].find(extension => extension.uri === extensionUri));
}, 'Header extensions can be deactivated on a per-mline basis');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
const t1 = pc1.addTransceiver('video');
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
// Get the transceiver after it is created by SRD.
const t2 = pc2.getTransceivers()[0];
const t2_capabilities = t2.getHeaderExtensionsToNegotiate();
const t2_capability_to_stop = t2_capabilities
.find(capability => capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid');
assert_not_equals(undefined, t2_capability_to_stop);
t2_capability_to_stop.direction = 'stopped';
t2.setHeaderExtensionsToNegotiate(t2_capabilities);
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
const t1_negotiated = t1.getNegotiatedHeaderExtensions()
.find(extension => extension.uri === t2_capability_to_stop.uri);
assert_not_equals(undefined, t1_negotiated);
assert_equals(t1_negotiated.direction, 'stopped');
const t1_capability = t1.getHeaderExtensionsToNegotiate()
.find(extension => extension.uri === t2_capability_to_stop.uri);
assert_not_equals(undefined, t1_capability);
assert_equals(t1_capability.direction, 'sendrecv');
}, 'Extensions not negotiated by the peer are `stopped` in getNegotiatedHeaderExtensions');
promise_test(async t => {
const pc = new RTCPeerConnection();
t.add_cleanup(() => pc.close());
const transceiver = pc.addTransceiver('video');
const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
assert_equals(negotiated_capabilites.length,
transceiver.getHeaderExtensionsToNegotiate().length);
for (const capability of negotiated_capabilites) {
assert_equals(capability.direction, 'stopped');
}
}, 'Prior to negotiation, getNegotiatedHeaderExtensions() returns `stopped` for all extensions.');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
// Disable a non-mandatory extension before first negotiation.
const transceiver = pc1.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
transceiver.setHeaderExtensionsToNegotiate(capabilities);
await negotiate(pc1, pc2);
const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
const local_negotiated = transceiver.getNegotiatedHeaderExtensions().find(ext => {
return ext.uri === selected_capability.uri;
});
assert_equals(local_negotiated.direction, 'stopped');
const remote_negotiated = pc2.getTransceivers()[0].getNegotiatedHeaderExtensions().find(ext => {
return ext.uri === selected_capability.uri;
});
assert_equals(remote_negotiated.direction, 'stopped');
}, 'Answer header extensions are a subset of the offered header extensions');
promise_test(async t => {
const pc1 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc2.close());
// Disable a non-mandatory extension before first negotiation.
const transceiver = pc1.addTransceiver('video');
const capabilities = transceiver.getHeaderExtensionsToNegotiate();
const selected_capability = capabilities.find((capability) => {
return capability.direction === 'sendrecv' &&
capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
});
selected_capability.direction = 'stopped';
transceiver.setHeaderExtensionsToNegotiate(capabilities);
await negotiate(pc1, pc2);
// Negotiate, switching sides.
await negotiate(pc2, pc1);
// PC2 will re-offer the extension.
const remote_reoffered = pc2.getTransceivers()[0].getHeaderExtensionsToNegotiate().find(ext => {
return ext.uri === selected_capability.uri;
});
assert_equals(remote_reoffered.direction, 'sendrecv');
// But PC1 will still reject the extension.
const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
const local_negotiated = transceiver.getNegotiatedHeaderExtensions().find(ext => {
return ext.uri === selected_capability.uri;
});
assert_equals(local_negotiated.direction, 'stopped');
}, 'A subsequent offer from the other side will reoffer extensions not negotiated by the initial offerer');
</script>
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