set LIBVA_DRIVER_NAME for arch

Signed-off-by: Naman Sood <mail@nsood.in>

zprofile

@@ -15,3 +15,21 @@ fi
 export PKGEXT=".pkg.tar"
 
 export TENDS_TO=42
+
+DISTRO=$(cat /etc/os-release | grep '^ID=' | awk -F'=' '{print $2}')
+
+if [ $DISTRO = 'arch' ]; then
+	# configure VA-API for hardware video acceleration
+	VIDEO_DRIVERS=($(ls /usr/lib/dri | grep drv_video | awk -F_ '{print $1}'))
+	VIDEO_DRIVERS_LEN=${#VIDEO_DRIVERS[@]}
+
+	if [ $VIDEO_DRIVERS_LEN -eq 1 ]; then
+		export LIBVA_DRIVER_NAME=$VIDEO_DRIVERS
+	elif [ $VIDEO_DRIVERS_LEN -gt 1 ]; then
+		if [ ! -v $LIBVA_DRIVER_NAME]; then
+			echo "Warning: more than one VA-API driver detected! Found: ${VIDEO_DRIVERS}." >&2
+			echo "Either delete the wrong driver or choose one manually by setting LIBVA_DRIVER_NAME." >&2
+		fi
+	fi
+	export LC_ALL=C
+fi