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vangel76
1e6f42eda2
Problem: the AV1 in-loop filters ran on one thread per frame (postfilter::apply had an unused pool). On a single-tile stream they are a quarter to a third of a frame, and since references are waited for as whole frames, that serial tail sat on the critical path of every frame that references it. Fix: the three filters run in bands of 64 luma rows on the decoder's existing rayon pool, one join per filter per frame. CDEF and loop restoration write only their own rows of a separate output. The loop filter's edges never touch the same sample, and only a band's top horizontal edges reach into the band above: each band refilters the vertical edges of a copy of the 8 rows above it, runs those edges against the copy, and the samples they changed are written back. With one thread the code path is the old one. Output stays bit-exact (1 vs 16 threads vs libdav1d; new 4:2:2 / 4:4:4 libaom fixtures). perf.rs gains a low-delay 1080p and a single-tile 2160p fixture and the all-core stage breakdown. 16 threads: 1080p GOP 1.16-1.30x, low delay 1.28x, 2160p 1.14x. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>