claude-noether
d8aa3aae8d
Substitutes H264DSPContext.chroma_dc_dequant_idct in the 4:2:0 / bit_depth=8 init path with a wrapper that composes the daedalus chroma DC Hadamard primitive (daedalus-fourier PR #25) with the qmul scaling FFmpeg's reference does in one fused function (h264idct_template.c::ff_h264_chroma_dc_dequant_idct). Algorithm per H.264 §8.5.11.1 / §8.5.11.2: 1. Extract 4 DCs from the scattered positions in the per-MB coefficient buffer (stride=32, xStride=16) 2. 2x2 Hadamard transform (daedalus primitive) 3. qmul scale + >> 7, write back to original positions Bit-exact against ff_h264_chroma_dc_dequant_idct_8_c. The Hadamard itself is gated by the fourier PR #23 7-case test suite (including the H·H = 4·I algebraic invariant), and the public-API parity test added in PR #25 confirms the src/ symbol matches the test ref. 4:2:2 chroma stays on the in-tree ff_h264_chroma422_dc_dequant_idct_c path — same chroma_format_idc<=1 gating shape as 0009 chroma deblock. Pin bump: _daedalus_fourier_commit / DAEDALUS_FOURIER_COMMIT bumped to b9f9ff2a (post-PR #25) so the build picks up the public daedalus_h264_chroma_dc_hadamard_2x2 symbol. Verified the patch applies cleanly on top of 0001-0010 against the pinned upstream commit b57fbbe5 on hertz.
272 lines
10 KiB
Bash
Executable File
272 lines
10 KiB
Bash
Executable File
#!/bin/bash
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# Build ffmpeg-v4l2-request-fourier_<ver>_arm64.deb (the Kwiboo FFmpeg
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# fork with the V4L2-Request API hwaccel patches).
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#
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# Mirror of arch/ffmpeg-v4l2-request-fourier into the Debian tree.
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# Provides the patched `ffmpeg` + `ffprobe` binaries plus the shared
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# libav* libraries with v4l2-request support, so consumers like
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# mpv-fourier (and the kdirect bit-exact reference test rig) work
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# end-to-end without a stock-Debian FFmpeg fallback.
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#
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# **Private prefix /opt/fourier** (Path A per fourier-debian
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# architecture discussion 2026-05-19). Stock Debian trixie ships
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# FFmpeg 7.1.x = libavcodec.so.61; this package ships FFmpeg 8.1 =
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# libavcodec.so.62 — different SOVERSION, NOT a drop-in for trixie's
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# KDE/VLC/etc. Living in /opt/fourier/lib keeps the stock system
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# intact; only fourier-aware consumers (firefox-fourier, mpv-fourier,
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# daedalus-v4l2) RPATH into /opt/fourier/lib. Postinst drops an
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# ld.so.conf.d entry so dlopen-based consumers (firefox at runtime)
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# find the libs by SONAME without LD_LIBRARY_PATH wrappers.
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#
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# Big build: 25-40 min on a runner. Output is a single .deb that
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# bundles ffmpeg/ffprobe + libavcodec.so.62 + libavformat.so.62 etc.
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# all together — no split per-library subpackages. Easier to consume,
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# trades off finer-grained downgrades.
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#
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# Sibling Arch package: ../../arch/ffmpeg-v4l2-request-fourier/PKGBUILD
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# Upstream: https://github.com/Kwiboo/FFmpeg (branch v4l2-request-n8.1)
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set -euo pipefail
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# Same pin as arch/ — v4l2-request-n8.1 tip 2026-04-24.
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UPSTREAM_COMMIT=b57fbbe50c9b2656fad86a1a7eeabfd2b2a50935
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FFMPEG_VERSION=8.1
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# epoch 2 matches Debian's stock ffmpeg (currently 7:7.1.x in trixie);
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# +rfourier suffix to avoid colliding with upstream/Debian rebuilds.
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PKGVER=2:${FFMPEG_VERSION}+rfourier+gb57fbbe
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PKGREL=10 # pkgrel=10 — H.264 luma qpel mc20 daedalus-fourier substitution
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# (cycle 9 of the daedalus-v4l2#11 step 2 substitution arc; closes
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# the libavcodec.so substitution sequence 6 IDCT4 / 7 IDCT8 /
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# 8 luma-v deblock / 9 qpel mc20). Pulls daedalus-fourier PR #2
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# which extends the public API with
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# daedalus_recipe_dispatch_h264_qpel_mc20. (2026-05-23)
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# daedalus-fourier pin. 209a421 = daedalus-fourier PR #2 merge — public
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# API now exposes daedalus_recipe_dispatch_h264_qpel_mc20 +
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# DAEDALUS_KERNEL_H264_QPEL_MC20. Cycle 9 plumbs the last H.264 NEON
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# kernel through the recipe layer. Daemon-side build (debian/daedalus-v4l2)
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# can bump in a follow-up; this PR only changes the libavcodec.so consumer.
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DAEDALUS_FOURIER_COMMIT=b9f9ff2a89c068aea54dcb52b543afddad28311e # PR #25 — public chroma DC Hadamard
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HERE=$(dirname "$(readlink -f "$0")")
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# Reproducible build. 2026-05-18 23:00 UTC — Phase 8.13 close.
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export SOURCE_DATE_EPOCH=1779231600
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work=$(mktemp -d)
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trap "rm -rf $work" EXIT
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cd "$work"
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git clone --depth 1 \
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--branch v4l2-request-n8.1 \
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https://github.com/Kwiboo/FFmpeg.git FFmpeg
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cd FFmpeg
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# git fetch the specific commit (depth=1 of branch tip might not be it)
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if [ "$(git rev-parse HEAD)" != "$UPSTREAM_COMMIT" ]; then
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git fetch origin "$UPSTREAM_COMMIT"
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git checkout "$UPSTREAM_COMMIT"
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fi
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# Apply patches (same as Arch).
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patch -Np1 -i "$HERE/0001-libudev-bypass-fallback.patch"
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patch -Np1 -i "$HERE/0002-nv15-to-p010-unpack.patch"
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patch -Np1 -i "$HERE/0003-h264-idct4-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0004-h264-idct8-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0005-h264-deblock-luma-v-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0006-h264-restore-low-delay.patch"
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patch -Np1 -i "$HERE/0007-h264-qpel-mc20-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0008-h264-deblock-luma-h-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0009-h264-deblock-chroma-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0010-h264-deblock-luma-intra-daedalus-fourier.patch"
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patch -Np1 -i "$HERE/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch"
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# --- daedalus-fourier: fetch + build static .a with PIC, install to a
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# per-build prefix; libavcodec.so links it into the shared object so
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# H264DSPContext.idct_add (and follow-up kernels) dispatch through the
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# daedalus recipe layer instead of the in-tree NEON .S code. ---
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#
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# PIC is mandatory — the static .a is linked into a .so, so all object
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# code must be relocatable. Vulkan is PUBLIC-linked by daedalus_core
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# (queryable QPU substrate); we add libvulkan1 to Debian Depends below
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# so dlopen of libavcodec.so.62 succeeds on stock trixie.
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FOURIER_PREFIX=$work/fourier-prefix
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mkdir -p "$FOURIER_PREFIX"
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pushd "$work" >/dev/null
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curl --connect-timeout 10 --max-time 600 --retry 3 --retry-delay 5 -sSLfo daedalus-fourier.tar.gz \
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"https://git.reauktion.de/marfrit/daedalus-fourier/archive/${DAEDALUS_FOURIER_COMMIT}.tar.gz"
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tar xzf daedalus-fourier.tar.gz
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pushd daedalus-fourier >/dev/null
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cmake -B build -G Ninja \
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-DCMAKE_BUILD_TYPE=Release \
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-DCMAKE_POSITION_INDEPENDENT_CODE=ON \
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-DCMAKE_INSTALL_PREFIX="$FOURIER_PREFIX"
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cmake --build build --target daedalus_core
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cmake --install build
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popd >/dev/null
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popd >/dev/null
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cd "$work/FFmpeg"
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# Configure with Arch-parity flags. Drops the same set of features
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# (X11, AMF, CUDA, FireWire, AviSynth, Bluray, OpenMPT, JPEG-XL,
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# Theora, XVid, rsvg, soxr, ssh, vidstab, modplug, SDL2, Vulkan,
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# JACK, GSM, Speex) — not needed on the Fourier fleet, keeps the .deb
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# smaller and the dependency graph tighter.
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./configure \
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--prefix=/opt/fourier \
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--bindir=/opt/fourier/bin \
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--libdir=/opt/fourier/lib \
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--shlibdir=/opt/fourier/lib \
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--incdir=/opt/fourier/include \
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--datadir=/opt/fourier/share/ffmpeg \
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--mandir=/opt/fourier/share/man \
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--extra-ldexeflags='-Wl,-rpath,/opt/fourier/lib' \
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--extra-ldsoflags='-Wl,-rpath,/opt/fourier/lib' \
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--extra-cflags="-I${FOURIER_PREFIX}/include" \
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--extra-ldflags="-L${FOURIER_PREFIX}/lib" \
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--extra-libs="-ldaedalus_core -lvulkan -lpthread" \
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--disable-debug \
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--disable-static \
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--disable-doc \
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--disable-stripping \
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--enable-shared \
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--enable-gpl \
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--enable-version3 \
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--enable-pic \
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--enable-neon \
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--arch=aarch64 \
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--enable-libdrm \
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--enable-libv4l2 \
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--enable-libudev \
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--enable-v4l2-request \
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--enable-v4l2_m2m \
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--enable-vaapi \
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--enable-opengl \
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--enable-gnutls \
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--enable-fontconfig \
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--enable-libass \
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--enable-libfreetype \
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--enable-libfribidi \
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--enable-libpulse \
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--enable-libdav1d \
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--enable-libopus \
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--enable-libvorbis \
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--enable-libmp3lame \
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--enable-libvpx \
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--enable-libx264 \
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--enable-libx265 \
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--enable-libwebp \
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--host-cflags='-fPIC'
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make -j"$(nproc)"
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make tools/qt-faststart
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# Stage
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ROOT="$work/pkgroot"
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make DESTDIR="$ROOT" install
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install -Dm755 tools/qt-faststart "$ROOT/opt/fourier/bin/qt-faststart"
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# ld.so.conf.d entry so dlopen-based consumers (firefox-fourier at
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# runtime) find /opt/fourier/lib/libavcodec.so.62 by SONAME without an
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# LD_LIBRARY_PATH wrapper. No risk of contaminating stock binaries:
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# stock KDE/VLC link against libavcodec.so.61 (different SONAME), so
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# the loader never sees our .so.62 as a match for their .so.61.
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install -Dm644 /dev/stdin "$ROOT/etc/ld.so.conf.d/fourier.conf" <<EOF
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# fourier campaign: FFmpeg 8.1 fork + libVA fork in private prefix.
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/opt/fourier/lib
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EOF
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# Optional /usr/bin shims so users can call ffmpeg-fourier without
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# remembering the /opt path. No conflict with stock /usr/bin/ffmpeg.
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install -d "$ROOT/usr/bin"
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ln -sf /opt/fourier/bin/ffmpeg "$ROOT/usr/bin/ffmpeg-fourier"
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ln -sf /opt/fourier/bin/ffprobe "$ROOT/usr/bin/ffprobe-fourier"
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# Doc
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mkdir -p "$ROOT/usr/share/doc/ffmpeg-v4l2-request-fourier" "$ROOT/DEBIAN"
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install -Dm644 "$HERE/debian/copyright" \
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"$ROOT/usr/share/doc/ffmpeg-v4l2-request-fourier/copyright"
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install -Dm644 "$HERE/debian/changelog" \
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"$ROOT/usr/share/doc/ffmpeg-v4l2-request-fourier/changelog.Debian"
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gzip -9 -n "$ROOT/usr/share/doc/ffmpeg-v4l2-request-fourier/changelog.Debian"
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cat > "$ROOT/DEBIAN/control" <<EOF
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Package: ffmpeg-v4l2-request-fourier
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Version: ${PKGVER}-${PKGREL}
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Section: video
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Priority: optional
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Architecture: arm64
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Depends: libc6,
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libdrm2,
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libvulkan1,
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libfontconfig1,
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libfreetype6,
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libfribidi0,
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libpulse0,
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libdav1d7 | libdav1d6,
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libopus0,
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libvorbis0a,
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libvorbisenc2,
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libmp3lame0,
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libvpx9 | libvpx8 | libvpx7,
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libx264-164 | libx264-163,
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libx265-215 | libx265-209 | libx265-199,
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libwebp7 | libwebp6,
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libwebpmux3,
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libass9,
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libgnutls30,
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libudev1,
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libv4l-0,
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libva2,
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libva-drm2
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Maintainer: Markus Fritsche <mfritsche@reauktion.de>
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Homepage: https://github.com/Kwiboo/FFmpeg
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Description: FFmpeg with V4L2 Request API hwaccel (Kwiboo fork, /opt/fourier prefix)
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FFmpeg ${FFMPEG_VERSION} patched with the V4L2 Request API stateless
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video decoder hwaccel — Kwiboo's long-running rebase of Jernej
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Škrabec's v4l2-request patchset onto FFmpeg release tags.
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.
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Provides 'ffmpeg -hwaccel v4l2request' / '-hwaccel drm' routes that
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drive rkvdec / hantro / cedrus / rpi-hevc-dec / daedalus_v4l2
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stateless decoders directly through libavcodec's hwdevice DRM path,
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bypassing libva. Used by mpv-fourier and firefox-fourier as their
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backing FFmpeg, and as the kdirect bit-exact reference in libva-v4l2-
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request-fourier validation.
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.
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INSTALLED TO /opt/fourier (NOT /usr): this is FFmpeg 8.1 (libav*.so.62)
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sitting alongside Debian trixie's stock FFmpeg 7.1 (libav*.so.61) —
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different SONAMEs, no symbol clash. Consumer binaries RPATH into
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/opt/fourier/lib; ld.so.conf.d/fourier.conf adds the path to ld.so
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cache for dlopen-by-SONAME (firefox). /usr/bin/ffmpeg-fourier and
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/usr/bin/ffprobe-fourier are convenience symlinks to /opt/fourier/bin.
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Stock 'ffmpeg' command unaffected.
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.
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Drops X11/AMF/CUDA/Bluray/JACK/Vulkan/SDL2/Theora/XVid/Speex/JPEG-XL
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per Fourier fleet policy (Wayland + ARM + video-decode focus).
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No 'ffplay' binary; mpv-fourier covers interactive playback.
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EOF
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# ldconfig must be re-run after install so /opt/fourier/lib is in the cache.
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cat > "$ROOT/DEBIAN/postinst" <<'PEOF'
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#!/bin/sh
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set -e
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if [ "$1" = "configure" ]; then
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ldconfig
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fi
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#DEBHELPER#
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PEOF
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chmod 755 "$ROOT/DEBIAN/postinst"
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cat > "$ROOT/DEBIAN/postrm" <<'PEOF'
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#!/bin/sh
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set -e
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if [ "$1" = "remove" ] || [ "$1" = "purge" ]; then
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ldconfig
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fi
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#DEBHELPER#
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PEOF
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chmod 755 "$ROOT/DEBIAN/postrm"
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DEB_OUT="ffmpeg-v4l2-request-fourier_${PKGVER//:/%3a}-${PKGREL}_arm64.deb"
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dpkg-deb --root-owner-group --build "$ROOT" "$HERE/$DEB_OUT"
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echo "built: $HERE/$DEB_OUT"
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