v4l2-relayd: init at 0.1.3

2 files changed, 97 insertions, 0 deletions

diff --git a/pkgs/os-specific/linux/v4l2-relayd/default.nix b/pkgs/os-specific/linux/v4l2-relayd/default.nix
new file mode 100644
index 0000000000000..293210fa9f570
--- /dev/null
+++ b/pkgs/os-specific/linux/v4l2-relayd/default.nix
@@ -0,0 +1,81 @@
+{ lib
+, stdenv
+, fetchgit
+, autoreconfHook
+, coreutils
+, glib
+, gnugrep
+, gst_all_1
+, icamerasrc
+, libtool
+, makeWrapper
+, pkg-config
+, which
+}:
+let
+  gst = [
+    gst_all_1.gstreamer.out
+    gst_all_1.gst-plugins-bad
+    gst_all_1.gst-plugins-base
+    gst_all_1.gst-plugins-good
+    icamerasrc
+  ];
+in
+stdenv.mkDerivation rec {
+  pname = "v4l2-relayd-${icamerasrc.ipuVersion}";
+  version = "0.1.3";
+
+  src = fetchgit {
+    url = "https://git.launchpad.net/v4l2-relayd";
+    rev = "refs/tags/upstream/${version}";
+    hash = "sha256-oU6naDFZ0PQVHZ3brANfMULDqYMYxeJN+MCUCvN/DpU=";
+  };
+
+  patches = [
+    ./upstream-v4l2loopback-compatibility.patch
+  ];
+
+  nativeBuildInputs = [
+    autoreconfHook
+    libtool
+    makeWrapper
+    pkg-config
+    which
+  ];
+
+  buildInputs = [
+    glib
+  ] ++ gst;
+
+  preConfigure = "./autogen.sh --prefix=$out";
+
+  postInstall = ''
+    mkdir -p $out/lib/systemd/system $out/etc/default
+    cp data/systemd/v4l2-relayd.service $out/lib/systemd/system
+    cp data/etc/default/v4l2-relayd $out/etc/default
+
+    substituteInPlace $out/lib/systemd/system/v4l2-relayd.service \
+      --replace grep ${gnugrep}/bin/grep \
+      --replace cut ${coreutils}/bin/cut \
+      --replace /usr/bin/test ${coreutils}/bin/test \
+      --replace /usr/bin/v4l2-relayd $out/bin/v4l2-relayd \
+      --replace /etc/default $out/etc/default \
+      --replace "DeviceAllow=char-video4linux" ""
+
+    substituteInPlace $out/etc/default/v4l2-relayd \
+      --replace 'FORMAT=YUY2' 'FORMAT=NV12' \
+      --replace 'CARD_LABEL="Virtual Camera"' 'CARD_LABEL="Intel MIPI Camera"' \
+      --replace 'VIDEOSRC="videotestsrc"' 'VIDEOSRC="icamerasrc"'
+
+    wrapProgram $out/bin/v4l2-relayd \
+      --prefix GST_PLUGIN_PATH : ${lib.makeSearchPathOutput "lib" "lib/gstreamer-1.0" gst}
+  '';
+
+  meta = with lib; {
+    description = "Streaming relay for v4l2loopback using GStreamer";
+    homepage = "https://git.launchpad.net/v4l2-relayd";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ betaboon ];
+    platforms = [ "x86_64-linux" ];
+  };
+}
diff --git a/pkgs/os-specific/linux/v4l2-relayd/upstream-v4l2loopback-compatibility.patch b/pkgs/os-specific/linux/v4l2-relayd/upstream-v4l2loopback-compatibility.patch
new file mode 100644
index 0000000000000..6435352282560
--- /dev/null
+++ b/pkgs/os-specific/linux/v4l2-relayd/upstream-v4l2loopback-compatibility.patch
@@ -0,0 +1,16 @@
+diff --git a/src/v4l2-relayd.c b/src/v4l2-relayd.c
+index 21bb0d5..cfc9e27 100644
+--- a/src/v4l2-relayd.c
++++ b/src/v4l2-relayd.c
+@@ -27,7 +27,10 @@
+ #include <gst/app/gstappsrc.h>
+ #include <gst/video/video-info.h>
+ 
+-#define V4L2_EVENT_PRI_CLIENT_USAGE  V4L2_EVENT_PRIVATE_START
++#define V4L2LOOPBACK_EVENT_BASE (V4L2_EVENT_PRIVATE_START)
++#define V4L2LOOPBACK_EVENT_OFFSET 0x08E00000
++#define V4L2_EVENT_PRI_CLIENT_USAGE \
++	(V4L2LOOPBACK_EVENT_BASE + V4L2LOOPBACK_EVENT_OFFSET + 1)
+ 
+ struct v4l2_event_client_usage {
+   __u32 count;