The send loop now moves one payload per step and chooses it afresh: audio,
then repairs, then video. A video group in progress or a full socket no
longer holds audio back for more than the payload in progress; a full
socket hands control back instead of spinning to the group deadline.
Repairs are queued by feedback intake and sent by the same step, each
checked against its own frame's deadline at send time and only to the
receiver that asked. The group deadline is checked before every payload; a
group that outlives it mid-send is abandoned and counted groups_cut_short.
A request's latency budget is clamped to 1..=2000 ms.
Tests pin the cap values, the clamp, per-payload audio priority (mid-frame,
full socket, between repairs), the send-time deadline for groups and
repairs, repairs going only to the asker, and the frame-id gap left by a
queue-cap, expiry or overflow drop.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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