debian/daedalus-v4l2: new package — userspace daemon + tools

Mirror of arch/daedalus-v4l2 into the Debian tree. Same pin (f04d700, Phase 8.13 close), same install layout. Output as arm64 .deb. Build path: CMake for daemon (build via ninja); in-tree Makefile for tools. No debhelper; standalone dpkg-deb so it builds on the non-Debian runner. Depends on ffmpeg (libavformat/libavcodec/libavutil 7.1+) at runtime, libdrm2. Recommends daedalus-v4l2-dkms (the kernel module). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-18 18:25:39 +00:00
parent 249e8461bb
commit add049f0bd
4 changed files with 193 additions and 0 deletions
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+#!/bin/bash
+# Build daedalus-v4l2_<ver>_arm64.deb (userspace daemon + test tools).
+#
+# Mirrors arch/daedalus-v4l2 (Arch Linux build).  The companion DKMS
+# package (debian/daedalus-v4l2-dkms) carries the kernel module
+# separately so apt/dpkg can split kernel-version-tied and userspace
+# upgrade cadence.
+#
+# Sibling Arch package: ../../arch/daedalus-v4l2/PKGBUILD
+# Sibling DKMS package: ../daedalus-v4l2-dkms/build-deb.sh
+# Upstream repo: https://git.reauktion.de/reauktion/daedalus-v4l2
+set -euo pipefail
+
+# Same pin as the Arch PKGBUILD.  f04d700 = "Phase 8.13: byte-exact
+# end-to-end via libva (consumer target hit)" — first commit where the
+# full ffmpeg -hwaccel vaapi → libva → /dev/video0 → daemon path lands
+# a pixel-correct decoded frame back in ffmpeg.
+UPSTREAM_COMMIT=f04d7000f858fe51d867aba14a529d3aef4fbd54
+PKGVER=0.1.0+r15+gf04d700
+PKGREL=1
+
+HERE=$(dirname "$(readlink -f "$0")")
+
+# Reproducible build.  2026-05-18 23:00 UTC — Phase 8.13 close.
+export SOURCE_DATE_EPOCH=1779231600
+
+work=$(mktemp -d)
+trap "rm -rf $work" EXIT
+
+cd "$work"
+curl -sSLfo daedalus-v4l2.tar.gz \
+    "https://git.reauktion.de/reauktion/daedalus-v4l2/archive/${UPSTREAM_COMMIT}.tar.gz"
+tar xzf daedalus-v4l2.tar.gz
+SRCDIR=daedalus-v4l2
+
+# Build daemon (CMake)
+cd "$SRCDIR/daemon"
+cmake -B build -G Ninja \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_INSTALL_PREFIX=/usr
+cmake --build build
+
+# Build test tools (in-tree Makefile)
+cd "$work/$SRCDIR/tools"
+make
+
+# Stage
+ROOT="$work/pkgroot"
+mkdir -p "$ROOT/DEBIAN" \
+         "$ROOT/usr/bin" \
+         "$ROOT/usr/libexec/daedalus-v4l2" \
+         "$ROOT/usr/include" \
+         "$ROOT/usr/share/doc/daedalus-v4l2"
+
+install -m 755 "$work/$SRCDIR/daemon/build/daedalus_v4l2_daemon" \
+    "$ROOT/usr/bin/daedalus_v4l2_daemon"
+
+install -m 755 "$work/$SRCDIR/tools/test_chardev_pingpong" \
+    "$ROOT/usr/libexec/daedalus-v4l2/test_chardev_pingpong"
+install -m 755 "$work/$SRCDIR/tools/test_m2m_decode" \
+    "$ROOT/usr/libexec/daedalus-v4l2/test_m2m_decode"
+install -m 755 "$work/$SRCDIR/tools/test_m2m_stream" \
+    "$ROOT/usr/libexec/daedalus-v4l2/test_m2m_stream"
+
+install -m 644 "$work/$SRCDIR/include/daedalus_v4l2_proto.h" \
+    "$ROOT/usr/include/daedalus_v4l2_proto.h"
+
+install -m 644 "$work/$SRCDIR/README.md" \
+    "$ROOT/usr/share/doc/daedalus-v4l2/README.md"
+for d in "$work/$SRCDIR/docs/"*.md; do
+    install -m 644 "$d" "$ROOT/usr/share/doc/daedalus-v4l2/$(basename "$d")"
+done
+
+install -Dm644 "$HERE/debian/copyright" "$ROOT/usr/share/doc/daedalus-v4l2/copyright"
+install -Dm644 "$HERE/debian/changelog" "$ROOT/usr/share/doc/daedalus-v4l2/changelog.Debian"
+gzip -9 -n "$ROOT/usr/share/doc/daedalus-v4l2/changelog.Debian"
+
+cat > "$ROOT/DEBIAN/control" <<EOF
+Package: daedalus-v4l2
+Version: ${PKGVER}-${PKGREL}
+Section: video
+Priority: optional
+Architecture: arm64
+Depends: ffmpeg (>= 7.1), libdrm2
+Recommends: daedalus-v4l2-dkms
+Maintainer: Markus Fritsche <mfritsche@reauktion.de>
+Homepage: https://git.reauktion.de/reauktion/daedalus-v4l2
+Description: Userspace daemon for the daedalus_v4l2 stateless decoder shim
+ daedalus-v4l2 ships the userspace daemon that backs the daedalus_v4l2
+ out-of-tree V4L2 kernel module on Raspberry Pi 5 / CM5.  Together they
+ expose /dev/videoNN + /dev/mediaNN as a V4L2 stateless decoder for
+ VP9, AV1, and H.264 — actual decoding happens in this single-threaded
+ daemon via dlopen'd FFmpeg, with decoded NV12 / P010 frames shipped
+ back through dmabuf.
+ .
+ Consumed end-to-end by libva-v4l2-request-fourier (>= 1.0.0+r376) so
+ that 'ffmpeg -hwaccel vaapi' against vp9_small.ivf produces a
+ byte-exact NV12 frame.
+ .
+ The kernel module ships separately in daedalus-v4l2-dkms; install
+ both to actually serve V4L2 clients.
+EOF
+
+DEB_OUT="daedalus-v4l2_${PKGVER}-${PKGREL}_arm64.deb"
+dpkg-deb --root-owner-group --build "$ROOT" "$HERE/$DEB_OUT"
+echo "built: $HERE/$DEB_OUT"