 marfrit
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16034152a8
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iter8 Phase 4c: α-2 plan — remove POC sentinel strip for rkvdec
Phase 3 strace re-decoded with correct struct layout:
- libva sends dpb[0] tfoc=0, bfoc=0 (sentinel stripped)
- kdirect sends dpb[0] tfoc=65536, bfoc=65536 (FFmpeg sentinel preserved)
- flags match between both (0x03 VALID|ACTIVE)
rkvdec config_registers() writes top/bottom_field_order_cnt directly to
MMIO. The strip was added in h264.c:219 for hantro's prepare_table; for
rkvdec, kdirect's path (no strip) decodes correctly while libva's
(strip) produces 16x32 partial decode.
Option A: remove the strip entirely (~5 LOC).
Option B: per-driver gating (~20 LOC).
Hantro+H.264 not exercised on RK3399 — Option A is safe. Phase 5c
review then Phase 6c implementation.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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2026-05-13 12:48:52 +00:00 |
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