From b7fa787f585b448bde7dd03f2214fb294bc9674c Mon Sep 17 00:00:00 2001
From: Audrey Dutcher <audrey@rhelmot.io>
Date: Wed, 19 Mar 2025 00:14:25 -0700
Subject: [PATCH] freebsd.v4l-compat: init

This is an adaptation of a script in freebsd-ports which generates
freebsd-compatible headers based on linux upstream.
---
 .../bsd/freebsd/pkgs/v4l-compat.nix           | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 pkgs/os-specific/bsd/freebsd/pkgs/v4l-compat.nix

diff --git a/pkgs/os-specific/bsd/freebsd/pkgs/v4l-compat.nix b/pkgs/os-specific/bsd/freebsd/pkgs/v4l-compat.nix
new file mode 100644
index 000000000000..f0e7bb9e91f5
--- /dev/null
+++ b/pkgs/os-specific/bsd/freebsd/pkgs/v4l-compat.nix
@@ -0,0 +1,60 @@
+{ lib, stdenv, fetchurl }:
+let
+  types_h = fetchurl {
+    url = "https://raw.githubusercontent.com/freebsd/freebsd-ports/3da53417998c611f340d75e45962da2fa912add5/multimedia/libv4l/files/types.h";
+    hash = "sha256-vbw82kxDC02vFhqdK3klh52pk/ecL+HwmmgQYYMEV9w=";
+  };
+  videodev_h = fetchurl {
+    url = "https://raw.githubusercontent.com/freebsd/freebsd-ports/3da53417998c611f340d75e45962da2fa912add5/multimedia/libv4l/files/videodev.h";
+    hash = "sha256-tcSZeBkaRo+K6i/tUYjhgQdEAuMhstvWsyVydIevAU4=";
+  };
+in
+stdenv.mkDerivation rec {
+  pname = "v4l-compat";
+  version = "5.8";
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v${lib.versions.major version}.x/linux-${version}.tar.xz";
+    hash = "sha256-5/dRhqoGQhFK+PGdmVWZNzAMonrK90UbNtT5sPhc8fU=";
+  };
+  allFiles = [
+    "linux/cec.h"
+    "linux/cec-funcs.h"
+    "linux/const.h"
+    "linux/dvb/audio.h"
+    "linux/dvb/ca.h"
+    "linux/dvb/dmx.h"
+    "linux/dvb/frontend.h"
+    "linux/dvb/net.h"
+    "linux/dvb/osd.h"
+    "linux/dvb/version.h"
+    "linux/dvb/video.h"
+    "linux/ivtv.h"
+    "linux/lirc.h"
+    "linux/media.h"
+    "linux/media-bus-format.h"
+    "linux/v4l2-common.h"
+    "linux/v4l2-controls.h"
+    "linux/v4l2-mediabus.h"
+    "linux/v4l2-subdev.h"
+    "linux/videodev2.h"
+  ];
+
+  buildPhase = ":";
+
+  installPhase = ''
+    for f in $allFiles; do
+      mkdir -p $(dirname $out/include/$f)
+      cp include/uapi/$f $out/include/$f
+    done
+    cp ${types_h} $out/include/linux/types.h
+    cp ${videodev_h} $out/include/linux/videodev.h
+  '';
+
+  meta = {
+    description = "Video4Linux header files for FreeBSD";
+    maintainers = [ lib.maintainers.rhelmot ];
+    platforms = lib.platforms.freebsd;
+    license = lib.licenses.gpl2Only;
+  };
+}