marfrit
493c762967
Cycle 7 of the libavcodec.so substitution arc (reauktion/daedalus-v4l2#11 step 2). H264DSPContext.idct8_add — called per 8×8 block from the High-profile intra-8×8-DCT decode path in libavcodec/h264_mb.c — now dispatches through daedalus_recipe_dispatch_h264_idct8 instead of ff_h264_idct8_add_neon. ## What - Add 0004-h264-idct8-daedalus-fourier.patch (in both arch/ and debian/ ffmpeg-v4l2-request-fourier/). Extends libavcodec/aarch64/ h264_idct_daedalus.c (introduced by 0003) with ff_h264_idct8_add_daedalus and a daedalus_recipe_dispatch_h264_idct8 call; patches libavcodec/aarch64/h264dsp_init_aarch64.c to wire c->idct8_add to the new shim. - arch/PKGBUILD + debian/build-deb.sh: append the new patch to the apply list; bump pkgrel/PKGREL to 7. - No new build-deps, no Depends change, no daedalus-fourier rev — the d87239d pin already exposes daedalus_recipe_dispatch_h264_idct8. ## Why The recipe layer picks the substrate; for cycle 7 (H.264 IDCT 8×8) the recipe is CPU NEON, so this is effectively a NEON-to-NEON substitution layered on top of cycle 6. Production validation of cycle 6 on higgs Firefox YouTube: 3040 frames decoded cleanly, avg_decode_us=3388 (no regression vs the pre-substitution ~4 ms baseline). Cycle 7 inherits the same shim's pthread_once context. Bit-exact against ff_h264_idct8_add_neon (daedalus-fourier cycle 7 green; FFmpeg 8×8 block storage block[r + 8*c] matches daedalus column-major convention). ## Scope NOT covered (deferred) - Bulk c->idct8_add4 (inter 8×8-DCT macroblocks) stays on the in-tree NEON .S code; batched substitution with n_blocks>1 lands later alongside the cycle-6 bulk-paths work. - High-bit-depth (10-bit) path untouched. - Cycles 8/9 — separate PRs. ## SONAME Unchanged. libavcodec.so.62 / libavformat.so.62 / libavutil.so.60. ## Refs - reauktion/daedalus-v4l2 issue #11 (substitution arc): reauktion/daedalus-v4l2#11 - marfrit-packages PR #76 (cycle 6 IDCT 4×4) - marfrit-packages PR #78 (libxml2 ABI-skew workaround) - marfrit/daedalus-fourier cycle 7 close (H.264 IDCT 8×8 NEON green)
marfrit-packages
Overlay package repository for the reauktion.de infrastructure.
Published at: https://packages.reauktion.de/
Scope
| Tree | Arches | Notes |
|---|---|---|
| Arch Linux ARM (ALARM) | aarch64 |
primary target — Pi 5, Rock 5, ampere, KU-1255 test rigs |
| Arch Linux | x86_64 |
for nuccies / workstations |
| Debian | arm64, amd64 |
for non-Arch hosts |
MIPS is intentionally unsupported. The Fritz!Box is sacred.
Layout (served at packages.reauktion.de)
packages.reauktion.de/
├── arch/
│ ├── aarch64/{marfrit.db,marfrit.files,*.pkg.tar.{xz,zst}{,.sig}}
│ └── x86_64/...
├── debian/
│ ├── dists/
│ │ ├── bookworm/{Release,InRelease,Release.gpg,main/binary-{arm64,amd64}/...}
│ │ └── trixie/...
│ └── pool/main/...
└── marfrit.gpg # public signing key
Adding the repo (Arch / ALARM)
curl -sO https://packages.reauktion.de/marfrit.gpg
sudo pacman-key --add marfrit.gpg
sudo pacman-key --lsign-key 92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C
# Paste at the end of /etc/pacman.conf:
[marfrit]
Server = https://packages.reauktion.de/arch/$arch
SigLevel = Required DatabaseRequired
sudo pacman -Sy
Adding the repo (Debian)
sudo install -m 755 -d /etc/apt/keyrings
curl -s https://packages.reauktion.de/marfrit.gpg | \
sudo gpg --dearmor -o /etc/apt/keyrings/marfrit.gpg
echo "deb [signed-by=/etc/apt/keyrings/marfrit.gpg] https://packages.reauktion.de/debian $(lsb_release -cs) main" | \
sudo tee /etc/apt/sources.list.d/marfrit.list
sudo apt update
Signing key
- Fingerprint:
92D5E96D8F63C75E4116AA1FF5C8C4603D0D250C - UID:
Markus Fritsche (marfrit-repo signing) <mfritsche@reauktion.de> - Expires: 2030-04-13
Key management procedures (renewal, rotation, revocation) live in DokuWiki at private:reauktion:marfrit_repo_key (admin-only).
Layout in this Git repo
marfrit-packages/
├── README.md
├── arch/
│ └── distcc-avahi/ # ALARM distcc with --with-avahi
├── debian/ # (future) Debian source packages
└── .gitea/
└── workflows/
└── build.yml # CI pipeline stub
mfritsche@reauktion.de.