pipewire-v4l2: the start of a v4l2 LD_PRELOAD library

pipewire-v4l2/src/pw-v4l2.in

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+# This file is part of PipeWire.
+#
+# Copyright © 2021 Wim Taymans
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+# DEALINGS IN THE SOFTWARE.
+#
+
+while getopts 'hr:vs:p:' param ; do
+	case $param in
+		r)
+			PIPEWIRE_REMOTE="$OPTARG"
+			export PIPEWIRE_REMOTE
+			;;
+		v)
+			if [ -z "$PIPEWIRE_DEBUG" ]; then
+				PIPEWIRE_DEBUG=3
+			else
+				PIPEWIRE_DEBUG=$(( PIPEWIRE_DEBUG + 1 ))
+			fi
+			export PIPEWIRE_DEBUG
+			;;
+		*)
+			echo "$0 - run v4l2 applications on PipeWire"
+			echo " "
+			echo "$0 [options] application [arguments]"
+			echo " "
+			echo "options:"
+			echo "	-h                  show brief help"
+			echo "	-r <remote>         remote daemon name"
+			echo "	-v                  verbose debug info"
+			exit 0
+			;;
+	esac
+done
+
+shift $(( OPTIND - 1 ))
+
+if [ x"$LD_PRELOAD" = x ] ; then
+   LD_PRELOAD="@LIBV4L2_PATH@/libpw-v4l2.so"
+else
+   LD_PRELOAD="$LD_PRELOAD @LIBV4L2_PATH@/libpw-v4l2.so"
+fi
+
+export LD_PRELOAD
+
+exec "$@"