stream-pipewire: Add a helper script for the pipewire backend

This is mostly for a easy way to stream out content from the pipewire
backend.

Similarly to the rdp script this can used on the server after checking the
pipewire id. On the remote side the rdp script can be used. Script
mentions that as usage.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>

doc/scripts/stream-pipewire.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Copyright © 2024 Collabora, Ltd.
+#
+# 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.
+#
+
+# Example usage:
+# 	stream-pipewire.sh 62 192.168.50.56 5557
+#
+# Use remoting-client-receive.bash script on the remote side to
+# display incoming content
+
+if [ -z $1 -o -z $2 -o -z $3 ]; then
+	echo "stream-pipewire.sh pipewire_id host_ip host_port"
+	exit 127
+fi
+
+pipewire_id=$1
+host=$2
+port=$3
+
+gst-launch-1.0 rtpbin name=rtpbin ! pipewiresrc path=${pipewire_id} ! videoconvert ! \
+	video/x-raw,format=I420 ! jpegenc ! rtpjpegpay ! \
+	rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 ! \
+	udpsink name=sink host=${host} port=$port rtpbin.send_rtcp_src_0 ! \
+	udpsink host=${host} port=$(($port + 1)) sync=false async=false udpsrc port=$(($port + 2)) ! \
+	rtpbin.recv_rtcp_sink_0