forked from unom/punktfunk
enricobuehler
e5ca213339
Stall program T2 (amplification kill), the phantom-latch half. A deciding window that delivered under a quarter of the target rate (a host-side capture stall, an outage, a mid-window pause) carries starvation-shaped distress — a jump-to-live flush, a keyframe-ask burst — that the decode-cap latch read as decoder evidence: under a periodic capture stall (the RDNA4 standby-sink field cases, one stall every ~5 s) every edge offers another 'backoff' at the SAME rate, and one pair latches a phantom decoder knee at whatever rate the display driver happened to interrupt. The session then fights the cap's re-probe ladder (+12.5% per 16-128 clean windows) for minutes on a decoder that was never the problem. Starved windows still back off (real damage deserves the safe response) but take the same 'not a knee sample either way' arm as a draining backoff: they neither latch a decode cap nor erase the reference a genuine choke set, so a real knee's pair still finds itself around the interruption. The ¼ bar sits deliberately far under the ×¾ utilization bar climbs require. Gates: 44 abr tests green (2 new: the stall-cycle no-latch scenario and the reference-preservation scenario), full core lib suite 346 green (--features quic), fmt + clippy clean.