marfrit 3c05564e99 iter5 Phase 3: baseline — 4/5 libva codecs race-lose, MPEG-2 wins, kdirect clean ...

5-codec sweep matrix on linux-fresnel-fourier 7.0-1 confirms:
- libva path returns all-zero cap_pool init pattern for H.264 (mostly)
  HEVC, VP9, VP8 (always). MPEG-2 wins the race (fastest hantro decode).
- kernel-direct ffmpeg-v4l2request hwdownload byte-matches SW for all
  4 race-losing codecs.
- B4 cosmetic init-probe EINVAL noise reproduced on hantro (2 ioctl per
  codec); MPEG-2 + VP8 stateless control submissions follow at = 0.

iter4 P7's "RGB(0,0x4c,0)" pattern corrected to all-zero raw bytes
(the 0x4c was YUV→RGB conversion of all-zero NV12). Same SHA shape
as iter3's hantro b34860e0 blocker fingerprint.

Control-payload strace anchors persisted as phase-7 invariants.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-11 05:14:57 +00:00

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