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>

debian/daedalus-v4l2/debian/changelog

@@ -0,0 +1,13 @@
+daedalus-v4l2 (0.1.0+r15+gf04d700-1) bookworm trixie; urgency=medium
+
+  * Initial Debian packaging for the daedalus-v4l2 userspace daemon.
+  * Pinned to f04d700 (Phase 8.13 close): first commit where the full
+    ffmpeg -hwaccel vaapi → libva-v4l2-request-fourier → /dev/video0
+    → daemon path lands a pixel-correct decoded NV12 frame back in
+    ffmpeg.
+  * Codecs: VP9, AV1, H.264 (all via dlopen'd FFmpeg 7.1.3).
+  * Capture formats: NV12M (2 plane), NV12 (1 plane, for libva),
+    P010 (10-bit single plane).
+  * Companion package: daedalus-v4l2-dkms (kernel module).
+
+ -- Markus Fritsche <mfritsche@reauktion.de>  Mon, 18 May 2026 23:00:00 +0000