Files
marfrit-packages/debian/daedalus-v4l2/build-deb.sh
T
claude-noether f21c1ff80a daedalus-v4l2{,-dkms}: f0d4186 -> 79256dc — H.264 B-frame reorder + menu ctrls
Lock-step bump of both packages to daedalus-v4l2#7 + #4.  PROTO_VERSION
bumps 0 → 1 at the daemon ↔ kernel chardev wire: REQ_DECODE adds
__u64 src_pts (the OUTPUT vb2 timestamp); RESP_FRAME adds __u32 flags
(HAS_PIXELS / SRC_CONSUMED) + __u64 output_src_pts (= frame->pts on
drain).  Both .debs must be installed atomically or the chardev
handshake rejects the version mismatch.

  * daedalus-v4l2: daemon's send_packet → receive_frame loop now
    stamps pkt->pts = req->src_pts and looks up the cookie for each
    drained frame via frame->pts.  chardev_client emits multiple
    RESP_FRAME messages per REQ_DECODE when libavcodec's display-
    order DPB releases an earlier frame on receipt of a later
    bitstream — fixes the "2 1 4 3 6 5" pair-swap on H.264 streams
    with B-frames.

  * daedalus-v4l2-dkms: kernel device_run mirrors src_buf timestamp
    into REQ_DECODE.src_pts.  Completion path splits HAS_PIXELS /
    SRC_CONSUMED: src is released as soon as send_packet succeeds
    (so the m2m scheduler moves on), dst stays parked until the
    matching frame is drained later.  TIMESTAMP_COPY's auto src→dst
    pairing no longer applies once lifecycles decouple — dst is
    stamped explicitly from inflight->src_pts at HAS_PIXELS time.

  * daedalus-v4l2-dkms also carries forward the -2 multi-kernel
    postinst fix (#64) from the prior PKGREL.  PKGREL resets to 1 on
    the new upstream pin.

The daedalus-v4l2#4 H.264 DECODE_MODE + START_CODE menu controls (a
cosmetic warning fix that PR landed alongside #7) is also subsumed —
"Unable to set control(s) error_idx=2/2" no longer fires.

Refs:
  * reauktion/daedalus-v4l2#7
  * reauktion/daedalus-v4l2#4
  * reauktion/daedalus-v4l2#6
2026-05-21 12:41:12 +02:00

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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. 79256dc = "kernel + daemon: H.264
# B-frame display reorder fix (closes #6)" — adds the wire-protocol
# src_pts / output_src_pts / RESP_FRAME flags split that lets H.264
# streams with B-frames preserve display order through libva → kernel
# → daemon. PROTO_VERSION bumps 0 → 1; lock-step userspace + kernel
# rebuild REQUIRED (daedalus-v4l2-dkms build-deb.sh pinned to the same
# commit).
UPSTREAM_COMMIT=79256dc7ef41f83873ca9c23db20f5888858e65d
PKGVER=0.1.0+r28+g79256dc
PKGREL=1 # reset for new upstream pin (79256dc — H.264 B-frame reorder fix)
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 --connect-timeout 10 --max-time 600 --retry 3 --retry-delay 5 -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" \
"$ROOT/lib/systemd/system" \
"$ROOT/usr/lib/modules-load.d"
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" \
"$ROOT/usr/include/daedalus_v4l2_proto.h"
# systemd unit + module autoload — without these the daemon never
# starts and the libva/VAAPI consumer's REQ_DECODE has nobody on
# the other end of /dev/daedalus-v4l2.
install -m 644 "$work/$SRCDIR/packaging/systemd/daedalus-v4l2.service" \
"$ROOT/lib/systemd/system/daedalus-v4l2.service"
install -m 644 "$work/$SRCDIR/packaging/systemd/daedalus-v4l2.modules-load" \
"$ROOT/usr/lib/modules-load.d/daedalus-v4l2.conf"
install -m 644 "$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 "$ROOT/usr/share/doc/daedalus-v4l2/changelog.Debian"
# DEBIAN/postinst — enable service + reload modules-load.d so the
# kernel module loads now if daedalus-v4l2-dkms is also installed.
# Does NOT auto-start the service — that requires /dev/daedalus-v4l2
# to already exist (the ConditionPathExists= in the .service file)
# which may not be true on the very first install before the user
# reboots or manually modprobes. Operator decides when to start.
cat > "$ROOT/DEBIAN/postinst" <<'POSTINST'
#!/bin/sh
set -e
if [ "$1" = "configure" ]; then
# Reload systemd so the new unit file is visible.
if command -v systemctl >/dev/null 2>&1; then
systemctl daemon-reload >/dev/null 2>&1 || true
systemctl enable daedalus-v4l2.service >/dev/null 2>&1 || true
fi
# Trigger /usr/lib/modules-load.d/daedalus-v4l2.conf without a
# reboot. Harmless if the module is already loaded; logs to
# journal if it can't load (most common cause: dkms hasn't built
# the module yet for the running kernel — see daedalus-v4l2-dkms
# postinst for the loud-warning path).
if command -v systemd-modules-load >/dev/null 2>&1; then
systemd-modules-load >/dev/null 2>&1 || true
fi
# Auto-start if /dev/daedalus-v4l2 came up (i.e. module loaded
# successfully). ConditionPathExists in the unit file means
# `systemctl start` is a no-op if the device isn't there yet —
# avoids spurious failures during apt install on a host where
# daedalus-v4l2-dkms hasn't built yet.
if [ -e /dev/daedalus-v4l2 ] && command -v systemctl >/dev/null 2>&1; then
systemctl start daedalus-v4l2.service >/dev/null 2>&1 || true
fi
fi
#DEBHELPER#
POSTINST
chmod 755 "$ROOT/DEBIAN/postinst"
cat > "$ROOT/DEBIAN/prerm" <<'PRERM'
#!/bin/sh
set -e
if [ "$1" = "remove" ] && command -v systemctl >/dev/null 2>&1; then
systemctl stop daedalus-v4l2.service >/dev/null 2>&1 || true
systemctl disable daedalus-v4l2.service >/dev/null 2>&1 || true
fi
#DEBHELPER#
PRERM
chmod 755 "$ROOT/DEBIAN/prerm"
cat > "$ROOT/DEBIAN/postrm" <<'POSTRM'
#!/bin/sh
set -e
if command -v systemctl >/dev/null 2>&1; then
systemctl daemon-reload >/dev/null 2>&1 || true
fi
#DEBHELPER#
POSTRM
chmod 755 "$ROOT/DEBIAN/postrm"
cat > "$ROOT/DEBIAN/control" <<EOF
Package: daedalus-v4l2
Version: ${PKGVER}-${PKGREL}
Section: video
Priority: optional
Architecture: arm64
Depends: ffmpeg-v4l2-request-fourier (>= 2:8.1+rfourier), 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"