add libva-v4l2-request-fourier package + Gitea Actions job

Production-tip successor to the experimental libva-v4l2-request-ohm-gl-fix
(tarball + 18-patch stack, never published). Tracks the libva-multiplanar
campaign fork's git history directly via git+commit pin, so iteration
sweeps land in a clean linear log instead of a growing patch stack.

Pinned commit 65969da3 = libva-multiplanar iter8 close (last commit on
master before fresnel-fourier work began layering MPEG-2 rewrites on top
2026-05-08). Promote to a later pin only after a future iteration closes
cleanly.

Workflow job mirrors ffmpeg-v4l2-request-aarch64 (same fermi LXC runner,
same makepkg → sign → repo-add → rsync-to-nc.reauktion.de pattern), and
chains via needs: ffmpeg-v4l2-request-aarch64 to serialize marfrit.db
updates. nasm dropped from bootstrap (libva has no x264-style asm).

replaces=(libva-v4l2-request libva-v4l2-request-ohm-gl-fix) covers both
stock Arch and locally-installed predecessor copies; predecessor was
never published so no marfrit.db collision.

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

arch/libva-v4l2-request-fourier/PKGBUILD

@@ -0,0 +1,69 @@
+# Maintainer: Markus Fritsche <fritsche.markus@gmail.com>
+#
+# libva-v4l2-request-fourier — VA-API backend for V4L2 stateless decoders,
+# multiplanar fork. Successor to the predecessor experimental package
+# libva-v4l2-request-ohm-gl-fix (tarball + 18-patch stack); this package
+# tracks the campaign fork's git history directly, so iteration sweeps
+# (DEBUG removal, follow-up bugfixes) land in a clean linear log.
+#
+# Campaign: ~/src/libva-multiplanar/ (eight closed iterations as of
+# 2026-05-06; iter8 close is the production tip pinned below).
+# Fork repo: https://git.reauktion.de/marfrit/libva-v4l2-request-fourier
+# Bootlin upstream: https://github.com/bootlin/libva-v4l2-request
+#
+# Build target: fermi LXC actrunner-aarch64-hertz via marfrit-packages
+# Gitea Actions (path=arch/libva-v4l2-request-fourier triggers the
+# libva-v4l2-request-fourier-aarch64 job — wire up alongside the existing
+# ffmpeg-v4l2-request-git job in .gitea/workflows/build.yml).
+# Alternative: boltzmann via his subagent + marfrit-publish.
+
+pkgname=libva-v4l2-request-fourier
+_upstreampkg=libva-v4l2-request
+
+# Pin the fork tip. 65969da = "iter8 Phase 4: tests/run_perf_binding_cell.sh"
+# — last commit on master before fresnel-fourier work started layering
+# MPEG-2 rewrites on top of it (2026-05-08). The libva-multiplanar campaign
+# closed iter8 at this commit; promote to a later pin only after a future
+# iteration closes cleanly.
+_commit=65969da3ee901442a8ca4e1f7f9697d5461d368a
+
+# Project version from meson.build (1.0.0) + commit count + short sha,
+# matching the ffmpeg-v4l2-request-fourier convention.
+pkgver=1.0.0.r280.65969da
+pkgrel=1
+pkgdesc="VA-API backend for V4L2 stateless decoders (multiplanar fork — fourier umbrella)"
+arch=('aarch64')
+url="https://git.reauktion.de/marfrit/libva-v4l2-request-fourier"
+license=('LGPL2.1' 'MIT')
+depends=('libva' 'libdrm' 'systemd-libs')
+makedepends=('meson' 'ninja' 'pkgconf' 'git')
+provides=("${_upstreampkg}=${pkgver}" 'libva-driver')
+conflicts=("${_upstreampkg}" 'libva-v4l2-request-ohm-gl-fix')
+replaces=("${_upstreampkg}" 'libva-v4l2-request-ohm-gl-fix')
+
+source=("git+https://git.reauktion.de/marfrit/libva-v4l2-request-fourier.git#commit=${_commit}")
+sha256sums=('SKIP')
+
+pkgver() {
+    cd "${srcdir}/${_upstreampkg}-fourier"
+    printf '1.0.0.r%s.%s' \
+        "$(git rev-list --count HEAD)" \
+        "$(git rev-parse --short=7 HEAD)"
+}
+
+build() {
+    cd "${srcdir}/${_upstreampkg}-fourier"
+    # meson_options.txt only exposes 'kernel_headers' — leave it empty to
+    # use system /usr/include kernel UAPI headers. No per-codec toggles.
+    arch-meson build --buildtype=release
+    meson compile -C build
+}
+
+package() {
+    cd "${srcdir}/${_upstreampkg}-fourier"
+    meson install -C build --destdir "${pkgdir}"
+
+    install -Dm644 COPYING       "${pkgdir}/usr/share/licenses/${pkgname}/COPYING"
+    install -Dm644 COPYING.LGPL  "${pkgdir}/usr/share/licenses/${pkgname}/COPYING.LGPL"
+    install -Dm644 COPYING.MIT   "${pkgdir}/usr/share/licenses/${pkgname}/COPYING.MIT"
+}