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<!doctype html>
<meta charset=utf-8>
<title>RTCPeerConnection: media flows to a second unidirectional transceiver added through renegotiation.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="RTCPeerConnection-helper.js"></script>
<script>
'use strict';
async function doTest(t, kind, firstTransceiverDirection) {
const pc1 = new RTCPeerConnection();
const pc2 = new RTCPeerConnection();
t.add_cleanup(() => pc1.close());
t.add_cleanup(() => pc2.close());
exchangeIceCandidates(pc1, pc2);
// Add a transceiver that we won't use and negotiate.
pc1.addTransceiver(kind, {direction: "recvonly"});
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
const [sendTransceiver1] = pc2.getTransceivers();
sendTransceiver1.direction = firstTransceiverDirection;
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
// Add another transceiver, that we will use, and renegotiate.
const stream = await getNoiseStream({[kind]: true});
const [track] = stream.getTracks();
t.add_cleanup(() => track.stop());
pc1.addTransceiver(kind, {direction: "recvonly"});
await pc1.setLocalDescription();
await pc2.setRemoteDescription(pc1.localDescription);
const [, sendTransceiver2] = pc2.getTransceivers();
sendTransceiver2.direction = "sendonly";
sendTransceiver2.sender.replaceTrack(track);
await pc2.setLocalDescription();
await pc1.setRemoteDescription(pc2.localDescription);
const [, recvTransceiver] = pc1.getTransceivers();
const {receiver} = recvTransceiver;
const threshold = 10;
let inboundStats, timedout = false;
t.step_timeout(() => timedout = true, 2000);
while (!timedout) {
const stats = await receiver.getStats();
inboundStats = [...stats.values()].find(({type}) => type == "inbound-rtp");
if (inboundStats?.packetsReceived > threshold) break;
await new Promise(r => t.step_timeout(r, 50));
}
assert_greater_than(inboundStats?.packetsReceived,
threshold,
"packets received indicates media flow."
);
}
promise_test(async t => {
await doTest(t, "video", "sendonly");
}, "Video flows to RTCPeerConnection's second transceiver added through renegotiation, with first transceiver also sending");
promise_test(async t => {
await doTest(t, "audio", "sendonly");
}, "Audio flows to RTCPeerConnection's second transceiver added through renegotiation, with first transceiver also sending");
promise_test(async t => {
await doTest(t, "video", "inactive");
}, "Video flows to RTCPeerConnection's second transceiver added through renegotiation, with first transceiver inactive");
promise_test(async t => {
await doTest(t, "audio", "inactive");
}, "Audio flows to RTCPeerConnection's second transceiver added through renegotiation, with first transceiver inactive");
</script>
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