claude-noether
ea99dc8e27
Companion to 0016 (PR #106). Adds a coefficient side buffer in H264Context, populated at the start of ff_h264_hl_decode_mb with a single memcpy from sl->mb BEFORE IDCT-add zeros it. The existing post-pixel-work callback (still in 0016) can now read: - h->mb_inspect_coeffs = pre-IDCT coefficients (this patch) - h->cur_pic.f->data = post-pixel-work pre-deblock reconstruction and derive P = pixels − IDCT(C) for daedalus-decoder's frame-major dispatch in PR-A3+. Memcpy gated on (h->mb_inspect_cb != NULL). Zero cost when no consumer is registered. Side buffer = 16 * 48 int16 = 1536 bytes (matches the 8-bit half of sl->mb's int16_t[16 * 48 * 2] declared size; high-bit-depth uses the upper half — not preserved here since the daedalus-decoder consumer is 8-bit-only). Single-threaded decode assumed at the consumer side (avctx->thread_count = 1). Multi-slice / multi-threaded streams would race on the single side buffer — explicit limitation of the inspection mechanism, future extension would put per-slice buffers in H264SliceContext. Verified: patches 0016 + 0017 apply cleanly and build in sequence against the Kwiboo v4l2-request-n8.1 fork at the pinned commit b57fbbe5. ff_h264_set_mb_inspect_cb symbol exported as before. Wired into arch PKGBUILD + debian build-deb.sh patch sequence. pkgrel bumped 13 → 14. Refs reauktion/daedalus-decoder!14 (PR-A2 callback wiring complete, PR-A3 coefficient extraction is the next consumer).
219 lines
7.4 KiB
Bash
219 lines
7.4 KiB
Bash
# Maintainer: Markus Fritsche <mfritsche@reauktion.de>
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#
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# FFmpeg + V4L2-Request hwaccel (stateless video decode on Rockchip,
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# Allwinner, etc) for the Fourier umbrella. Tracks Kwiboo's long-running
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# rebase of Jernej Škrabec's v4l2-request patchset onto ffmpeg release
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# tags. Pins the branch tip to a known commit for reproducible CI builds;
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# bump _commit when upstream picks up a fix we want.
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#
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# Why this fork instead of AUR ffmpeg-v4l2-request-git:
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# - AUR is pinned to 6.1.1 with epoch=2, which is OLDER than Arch's
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# stock 2:8.1-3 → installing it downgrades system ffmpeg.
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# - AUR pulls X11/AMF/CUDA/FireWire/AviSynth/OpenMPT/Bluray — irrelevant
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# for a Wayland + ARM + video-decode fleet.
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# - AUR uses #branch=..., no commit pin. CI artifacts are non-reproducible.
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#
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# Encoders (libx264/libx265/libvpx/libdav1d) kept per Fourier fleet policy.
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# X11, AMF, CUDA, FireWire, AviSynth, OpenMPT, Bluray, OpenMAX, JPEG-XL,
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# Theora, XVid, rsvg, soxr, ssh, vidstab, modplug, SDL2, Vulkan, JACK, GSM,
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# Speex dropped — not needed on the Fourier fleet. (No SDL2 means no
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# `ffplay` binary; mpv covers interactive playback.)
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pkgname=ffmpeg-v4l2-request-fourier
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_srcname=FFmpeg
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_version='8.1'
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_commit='b57fbbe50c9b2656fad86a1a7eeabfd2b2a50935' # v4l2-request-n8.1 tip 2026-04-24
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pkgver=8.1.r123329.b57fbbe
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pkgrel=14 # pkgrel=14 — per-MB coefficient side buffer (0017) extending 0016 for daedalus-decoder CLI IDCT validation; observation-only, no behaviour change to existing decode path
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epoch=2
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# daedalus-fourier pin. 209a421 = PR #2 merge (Phase 8c — public API
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# gains daedalus_recipe_dispatch_h264_qpel_mc20 + DAEDALUS_KERNEL_H264_QPEL_MC20).
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# Cycle 9 closes the libavcodec.so substitution arc started at cycle 6.
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_daedalus_fourier_commit='b9f9ff2a89c068aea54dcb52b543afddad28311e' # PR #25 — public chroma DC Hadamard symbol
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pkgdesc='FFmpeg with V4L2 Request API hwaccel (Rockchip / Allwinner stateless decode)'
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arch=('aarch64')
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url='https://github.com/Kwiboo/FFmpeg'
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license=('GPL-3.0-or-later')
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depends=(
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alsa-lib
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bzip2
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fontconfig
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vulkan-icd-loader
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fribidi
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gmp
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gnutls
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lame
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libass.so
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libdav1d.so
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libdrm
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libfreetype.so
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libgl
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libpulse
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libva.so
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libva-drm.so
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libvorbis.so
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libvorbisenc.so
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libvpx.so
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libwebp
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libx264.so
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libx265.so
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libxml2
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opus
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v4l-utils
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xz
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zlib
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)
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makedepends=(
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cmake
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git
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linux-api-headers
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mesa
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nasm
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ninja
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vulkan-headers
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)
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provides=(
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libavcodec.so
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libavdevice.so
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libavfilter.so
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libavformat.so
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libavutil.so
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libpostproc.so
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libswresample.so
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libswscale.so
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ffmpeg
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)
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conflicts=(ffmpeg)
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replaces=(ffmpeg ffmpeg-v4l2-request-git)
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source=("git+https://github.com/Kwiboo/FFmpeg.git#commit=${_commit}"
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"daedalus-fourier-${_daedalus_fourier_commit}.tar.gz::https://git.reauktion.de/marfrit/daedalus-fourier/archive/${_daedalus_fourier_commit}.tar.gz"
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'0001-libudev-bypass-fallback.patch'
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'0002-nv15-to-p010-unpack.patch'
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'0003-h264-idct4-daedalus-fourier.patch'
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'0004-h264-idct8-daedalus-fourier.patch'
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'0005-h264-deblock-luma-v-daedalus-fourier.patch'
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'0006-h264-restore-low-delay.patch'
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'0007-h264-qpel-mc20-daedalus-fourier.patch'
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'0008-h264-deblock-luma-h-daedalus-fourier.patch'
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'0009-h264-deblock-chroma-daedalus-fourier.patch'
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'0010-h264-deblock-luma-intra-daedalus-fourier.patch'
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'0011-h264-chroma-dc-hadamard-daedalus-fourier.patch'
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'0012-h264-qpel-rest-daedalus-fourier.patch'
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'0013-h264-deblock-chroma-intra-daedalus-fourier.patch'
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'0014-h264-ctx-qpu-capable.patch'
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'0015-h264-ctx-revert-to-no-qpu.patch'
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'0016-h264-mb-inspect-callback.patch'
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'0017-h264-mb-coeffs-side-buffer.patch')
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sha256sums=('SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP' 'SKIP')
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pkgver() {
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cd "${_srcname}"
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printf '%s.r%s.%s' "${_version}" \
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"$(git rev-list --count HEAD)" \
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"$(git rev-parse --short=7 HEAD)"
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}
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prepare() {
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cd "${_srcname}"
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patch -Np1 -i "${srcdir}/0001-libudev-bypass-fallback.patch"
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patch -Np1 -i "${srcdir}/0002-nv15-to-p010-unpack.patch"
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patch -Np1 -i "${srcdir}/0003-h264-idct4-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0004-h264-idct8-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0005-h264-deblock-luma-v-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0006-h264-restore-low-delay.patch"
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patch -Np1 -i "${srcdir}/0007-h264-qpel-mc20-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0008-h264-deblock-luma-h-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0009-h264-deblock-chroma-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0010-h264-deblock-luma-intra-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0011-h264-chroma-dc-hadamard-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0012-h264-qpel-rest-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0013-h264-deblock-chroma-intra-daedalus-fourier.patch"
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patch -Np1 -i "${srcdir}/0014-h264-ctx-qpu-capable.patch"
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patch -Np1 -i "${srcdir}/0015-h264-ctx-revert-to-no-qpu.patch"
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patch -Np1 -i "${srcdir}/0016-h264-mb-inspect-callback.patch"
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patch -Np1 -i "${srcdir}/0017-h264-mb-coeffs-side-buffer.patch"
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}
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build() {
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# --- daedalus-fourier: build static .a with PIC, install to a
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# per-build prefix; libavcodec.so links it into the shared object so
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# H264DSPContext.idct_add (and follow-up kernels) dispatch through
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# the daedalus recipe layer instead of the in-tree NEON .S code. ---
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local _fourier_prefix="${srcdir}/fourier-prefix"
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mkdir -p "${_fourier_prefix}"
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pushd "${srcdir}"/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="${_fourier_prefix}"
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cmake --build build --target daedalus_core
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cmake --install build
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popd >/dev/null
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cd "${_srcname}"
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# FFmpeg's configure resolves the compiler via `which` and bakes the
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# absolute path into generated makefiles, bypassing the makepkg
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# /usr/lib/distcc/bin shim. Pass it explicitly so `BUILDENV=(distcc ...)`
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# actually distributes; otherwise everything compiles locally.
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local _ffmpeg_cc=gcc _ffmpeg_cxx=g++
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if [[ ":$PATH:" == *":/usr/lib/distcc/bin:"* ]]; then
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_ffmpeg_cc='distcc gcc'
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_ffmpeg_cxx='distcc g++'
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fi
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./configure \
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--prefix=/usr \
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--cc="${_ffmpeg_cc}" \
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--cxx="${_ffmpeg_cxx}" \
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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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\
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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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\
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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-libxml2 \
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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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\
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--extra-cflags="-I${_fourier_prefix}/include" \
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--extra-ldflags="-L${_fourier_prefix}/lib" \
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--extra-libs="-ldaedalus_core -lvulkan -lpthread" \
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--host-cflags='-fPIC'
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make
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make tools/qt-faststart
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}
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package() {
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cd "${_srcname}"
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make DESTDIR="${pkgdir}" install
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install -Dm755 tools/qt-faststart "${pkgdir}/usr/bin/qt-faststart"
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}
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