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zebra-spaces: drop tiles of demoted-to-listener peers immediately

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Was: when a speaker was bounced to listener their tiles froze on every
other peer until either the SFU's removePublisher path finally fired
'ended' on the subscriber's tracks or the 60s/120s mute window reaped
them. Pion's OnConnectionStateChange can lag and SSE renegotiation can
race, leaving visibly-frozen tiles for tens of seconds.

Authoritative removal: when role-change strips speak rights from
peer X (canSpeak(prev) && !canSpeak(next)), drop every kind of X's
video tile on the receiver side immediately. The demoted user can't
publish anymore by definition, so the tiles are guaranteed-stale —
no need to wait for the data-plane path to catch up.

Mirrors the existing peer-left handler which removes by pubkey.
This commit is contained in:
Russell Ballestrini 2026-06-03 12:38:55 -04:00
parent c76cb397ba
commit 1e94fa6812
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1 changed files with 17 additions and 2 deletions
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19
web/zebra-spaces.html
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@ -3191,6 +3191,21 @@ async function handleSignal(raw){
if (canSpeak(myRole) && canSpeak(m.role) && !peers.has(m.uuid)){
connectToPeer(m.uuid, myUUID < m.uuid);
}
/* If the role transition stripped them of the ability to
* publish (anything -> listener), their camera/screen/game
* tiles can't get fresh RTP anymore. The demoted page calls
* sfuUnpublish* on its own side which should propagate via
* SFU 'ended', but that path is unreliable (Pion may not
* fire OnConnectionStateChange immediately and SSE renego
* can race). Authoritative removal: drop tiles by pubkey
* here, the moment the role change broadcast lands. */
if (canSpeak(prev) && !canSpeak(m.role) && subjPub){
try {
removeScreenTile(subjPub);
removeCameraTile(subjPub);
removeVideoTile('gameshare', subjPub);
} catch(_){}
}
}
renderRoom();
reorderTiles();
@ -3974,8 +3989,8 @@ logLine('', 'ready — pick a handle, type a rendezvous code, enter the space');
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