displaycameras

#!/bin/bash
### BEGIN INIT INFO
# Provides: omxplayer
# Required-Start: $network $local_fs dbus cron
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Displays camera feeds for monitoring
# Description:
### END INIT INFO

#version:0.8.3

# Exit if not root
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root"
   exit 0
fi

# Exit if omxplayer_dbus is not executable and in the PATH
if [ ! `which omxplayer_dbuscontrol` ]; then
	echo "omxplayer_dbuscontrol must be executable and in the PATH env variable."
	exit 1
fi

# Exit if omxplayer is not installed
if [ ! `which omxplayer` ]; then
	echo "Please, install omxplayer."
	exit 1
fi

# Exit if config file is not present and readable
if [ -r /etc/displaycameras/displaycameras.conf ]; then
	. /etc/displaycameras/displaycameras.conf;
else
	echo "/etc/displaycameras/displaycameras.conf does not exist or is not readable."
	exit 1
fi

# Exit if default layout config file is not present and readable
if [ ! -r /etc/displaycameras/layout.conf.default ]; then
	echo "/etc/displaycameras/layout.conf.default does not exist or is not readable."
	exit 1
fi

# If enabled, autodetect display mode, check for layout config file for that
# mode, and load that file if present.
if [ "$displaydetect" = "true" ]; then
	if [ "`grep disable_overscan /boot/config.txt | egrep -v ^#`" = "disable_overscan=1" ]; then
		mode="`fbset -s | egrep ^mode | awk -v N=2 '{print $2}'`"
		# remove quotes surrounding $mode
		mode=${mode%\"}
		mode=${mode#\"}
		if [ -r /etc/displaycameras/layout.conf.$mode ]; then
			. /etc/displaycameras/layout.conf.$mode
			displaydetectactive=true
		else
			. /etc/displaycameras/layout.conf.default
			echo "No layout configuration file found for $mode resolution."
		fi
	else
		. /etc/displaycameras/layout.conf.default
		echo "Display resolution autodetection will not work properly with overscan enabled."
		echo "Ensure disable_overscan=1 is in /boot/config.txt."
	fi
else
	. /etc/displaycameras/layout.conf.default
fi

# Ensure there is an omxplayer timeout value
if [ "$omx_timeout" = "" ]; then
	omx_timeout=30
fi

# Set a variables for PID file and Display Sequence file
PIDFILE=/var/run/displaycameras.pid
DISPLAY_SEQUENCE_FILE=/tmp/displaycameras.seq

# How many cameras do we have?
cameras="${#camera_names[@]}"
# Set the max camera rotation sequence as one less than the number of cameras
# (since it starts at zero).
max_seq=$((cameras-1))
# Ensure sequence step value is reasonable
if [ "$seq_step" = "" ] || [ "$seq_step" -gt "$max_seq" ] || [ "$seq_step" -lt "1" ]; then
	seq_step=1
fi

# Figure out the current display sequence or set it to zero if it doesn't exist.
if [ ! -f $DISPLAY_SEQUENCE_FILE ]; then
	echo 0 > $DISPLAY_SEQUENCE_FILE
fi
declare -i DISPLAY_SEQUENCE
DISPLAY_SEQUENCE=`cat $DISPLAY_SEQUENCE_FILE`

#Functions

case "$1" in
# Start displaying camera feeds
start)
if [ -f $PIDFILE ]; then
	echo "PID file exists!  Stop or Restart this service instead."
exit 1
fi
if [ "$blank" = "true" ]; then
	echo "Blanking screen"
	fbi --noverbose -T 2 /usr/bin/black.png >/dev/null 2>&1 &
fi
if [ "$displaydetectactive" = "true" ]; then
	echo "Display detection is active for $mode resolution."
fi
startupfailure=false
feedfailure=false
for i in ${!camera_names[*]}
do
	if [[ ${windows[$i]} =~ "PIP" ]]
	then
		pip="--layer=3"
	else
		pip=""
	fi
	startupretry=0
	feedretry=0
	x=$((i+$DISPLAY_SEQUENCE))
	if [ "$x" -ge "${#camera_names[@]}" ]; then x=$((x-${#camera_names[@]}))
	fi
	player="omxplayer ${pip} --no-keys --no-osd --avdict rtsp_transport:tcp --win \"${window_positions[$x]}\" \"${camera_feeds[$i]}\" --live -n -1 --timeout "$omx_timeout" --dbus_name "org.mpris.MediaPlayer2.omxplayer.${camera_names[$i]}" >/dev/null &"
	echo "Starting omxplayer for ${camera_names[$i]}"
	eval $player
	sleep $startsleep
	while [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" != "Playing" ]
	do
		sleep 1
		echo "Waiting for ${camera_names[$i]} omxplayer startup $startupretry"
		if [ "$startupretry" -eq "$retry" ]; then
			break
		fi
		startupretry=$((startupretry+1))
	done
	if [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" = "Playing" ]
	then
		sleep $feedsleep
		while [ "`omxplayer_dbuscontrol ${camera_names[$i]} getposition`" = "0s" ]
		do
			sleep 1
			echo "Waiting for ${camera_names[$i]} playback $feedretry"
			if [ "$feedretry" -eq "$retry" ]; then
				omxplayer_dbuscontrol $i quit
				feedfailure=true
				break
			fi
		feedretry=$((feedretry+1))
		done
	else
		startupfailure=true
	fi
	if [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" = "Playing" ] && [ "`omxplayer_dbuscontrol ${camera_names[$i]} getposition`" != "0s" ]; then
		echo "${camera_names[$i]} started"
	else
		echo "${camera_names[$i]} failed playback"
	fi
done
touch $PIDFILE
# One go at a repair job if not all displays start correctly
if [ "$startupfailure" = "true" ] || [ "$feedfailure" = "true" ]; then
	echo "Running a repair on failed feeds."
	$0 repair startup
fi
echo "Camera Display Started"
echo "For complete status info, run"
echo "/usr/bin/displaycameras status."
if [ "$rotate" = "true" ]; then
	if [ "$rotatedelay" = "" ]; then
		rotatedelay=5
	fi
	echo "Starting camera rotation"
	rotatedisplays $rotatedelay $seq_step &
fi
;;

# Stop displaying camera feeds
stop)
rm -f $PIDFILE
rm -f $DISPLAY_SEQUENCE_FILE
if [ "$rotate" = "true" ]; then
	pkill rotatedisplays
fi
for i in ${camera_names[@]}
do
	omxplayer_dbuscontrol $i quit
done
sleep 2
if [ "$blank" = "true" ]; then
	pkill fbi
fi
killall omxplayer.bin > /dev/null 2>&1
echo "Camera Display Stopped"
exit 0
;;

# Restart
restart)
$0 stop
sleep 1
$0 start
;;

# Restart any camera feeds that don't claim to be playing or restart the service
# if too many omxplayer.bin instances are active.
repair)
# Do nothing unless the service PID file exists
if [ ! -f $PIDFILE ]; then exit 0; fi
# Stop and start the service if we have too many omxplayers
if [ `pgrep -c omxplayer.bin` -gt $cameras ]
then
	$0 restart
fi
# The actual repair part
for i in ${!camera_names[*]}
do
	if [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" != "Playing" -o "`omxplayer_dbuscontrol ${camera_names[$i]} getposition`" = "0s" ]
	then
		if [[ ${windows[$i]} =~ "PIP" ]]
		then
			pip="--layer=3"
		else
			pip=""
		fi
		rm -f $PIDFILE
		pkill rotatedisplays
		omxplayer_dbuscontrol ${camera_names[$i]} quit
		x=$((i+$DISPLAY_SEQUENCE))
		if [ "$x" -ge "${#camera_names[@]}" ]; then x=$((x-${#camera_names[@]}))
		fi
		player="omxplayer ${pip} --no-keys --no-osd --avdict rtsp_transport:tcp --win \"${window_positions[$x]}\" \"${camera_feeds[$i]}\" --live -n -1 --timeout "$omx_timeout" --dbus_name "org.mpris.MediaPlayer2.omxplayer.${camera_names[$i]}" >/dev/null &"
		echo "Starting omxplayer for ${camera_names[$i]}"
		eval $player
		sleep $startsleep
		startupretry=0
		feedretry=0
		while [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" != "Playing" ]
		do
			sleep 1
			echo "Waiting for ${camera_names[$i]} omxplayer startup $startupretry"
			if [ "$startupretry" -eq "$retry" ]; then
				break
			fi
			startupretry=$((startupretry+1))
		done
		if [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" = "Playing" ]
		then
			sleep $feedsleep
			while [ "`omxplayer_dbuscontrol ${camera_names[$i]} getposition`" = "0s" ]
			do
				sleep 1
				echo "Waiting for ${camera_names[$i]} playback $feedretry"
				if [ "$feedretry" -eq "$retry" ]; then
					omxplayer_dbuscontrol $i quit
					feedfailure=true
					break
				fi
				feedretry=$((feedretry+1))
			done
		else
			startupfailure=true
		fi
		if [ "`omxplayer_dbuscontrol ${camera_names[$i]} getplaystatus`" = "Playing" ] && [ "`omxplayer_dbuscontrol ${camera_names[$i]} getposition`" != "0s" ]; then
			echo "${camera_names[$i]} started"
		else
			echo "${camera_names[$i]} failed playback"
		fi
		touch $PIDFILE
		if [ "$rotate" = "true" ]; then
			if [ "$rotatedelay" = "" ]; then
				rotatedelay=5
			fi
			if [ "$2" != "startup" ]; then
				echo "Restarting camera rotation"
				rotatedisplays $rotatedelay $seq_step &
			fi
		fi
	fi
done
;;

rotate)
# Do nothing unless the service PID file exists
if [ ! -f $PIDFILE ]; then exit 0; fi
DISPLAY_SEQUENCE=$((DISPLAY_SEQUENCE-$seq_step))
if [ "$DISPLAY_SEQUENCE" -lt "0" ]; then
        DISPLAY_SEQUENCE="$max_seq"
fi
for i in ${!camera_names[*]}
do
        y=$((i-DISPLAY_SEQUENCE-1))
        if [ "$y" -lt "0" ]; then y=$((y+"${#camera_names[@]}"))
        fi
        if [ "$y" -ge "${#camera_names[@]}" ]; then y=$((y-"${#camera_names[@]}"
))
        fi
        x=$((y+$DISPLAY_SEQUENCE))
        if [ "$x" -ge "${#camera_names[@]}" ]; then x=$((x-"${#camera_names[@]}"
))
        fi
        eval omxplayer_dbuscontrol "${camera_names[$y]}" setvideopos \"${window_positions[$x]}\"
done
echo $DISPLAY_SEQUENCE > $DISPLAY_SEQUENCE_FILE
;;

rotaterev)
if [ ! -f $PIDFILE ]; then exit 0; fi
DISPLAY_SEQUENCE=$((DISPLAY_SEQUENCE+$seq_step))
if [ "$DISPLAY_SEQUENCE" -ge "${#camera_names[@]}" ]; then
        DISPLAY_SEQUENCE=0
fi
for i in ${!camera_names[*]}
do
        y=$((i-DISPLAY_SEQUENCE+1))
        if [ "$y" -lt "0" ]; then y=$((y+"${#camera_names[@]}"))
        fi
        if [ "$y" -ge "${#camera_names[@]}" ]; then y=$((y-"${#camera_names[@]}"))
        fi
        x=$((y+$DISPLAY_SEQUENCE))
        if [ "$x" -ge "${#camera_names[@]}" ]; then x=$((x-"${#camera_names[@]}"))
        fi
        eval omxplayer_dbuscontrol "${camera_names[$y]}" setvideopos \"${window_positions[$x]}\"
done
echo $DISPLAY_SEQUENCE > $DISPLAY_SEQUENCE_FILE
;;

status)
for i in "${camera_names[@]}"
do
	status="`omxplayer_dbuscontrol $i status 2>/dev/null`"
	if [[ "$status" != "Playing"* ]]; then
		echo "$i is NOT playing"
	else
		echo "$i is $status"
	fi
done
;;

positions)
for i in "${camera_names[@]}"
do
	position="`omxplayer_dbuscontrol $i getposition`"
	echo "$position $i"
done
;;

*)
echo "Usage: /usr/bin/displaycameras {start|stop|restart|repair|status|positions|rotate|rotaterev}"
exit 1
;;
esac