listen

#!/bin/bash
# Script to control MK808 from serial port2 on FT2232 USB interface used on the DigiLite.
# Accepts a string of variables for input and generates the encoder settings.
# by M0DTS 

cd /root/binaries; # Change path to binaries directory

#stty -F /dev/ttyUSB0 -opost
stty -F /dev/ttyUSB1 9600 raw

echo -e "\nRunning with Controller, Waiting control command..."


while true
do
	read -n 80 string < /dev/ttyUSB1
	echo $string

	if echo  $string | egrep -q "start";
	then
		echo "started." > /dev/ttyUSB1
		sleep 1
	fi

	if echo  $string | egrep -q "stop";
	then
		echo "Stopped." > /dev/ttyUSB1
  		killall dvbsenco8 > /dev/null 2>&1
		killall hcapture > /dev/null 2>&1
		killall pstots > /dev/null 2>&1
		killall dvbsiadd > /dev/null 2>&1
		killall dvbnullpadder > /dev/null 2>&1
		echo -e "SD Card mode, waiting to satrt up encoder..."
		sleep 1
	fi

	if echo  $string | egrep -q "##";
	then
		SR=${string:2:4}
		FEC=${string:7:3}
		VPID=${string:11:4}
		APID=${string:16:4}
		PMTPID=${string:21:4}
		INPUT=${string:26:1}
		CALLSIGN=${string:28:10}
		TITLE=${string:39:15}
		TEXT=${string:55:15}
		echo -e "SR="$SR "FEC="$FEC "VPID="$VPID "APID="$APID "PMTPID="$PMTPID "CALLSIGN="$CALLSIGN "INPUT="$INPUT

		#Calculate Video bit rate value for current SR/FEC
		DSR=$(echo "scale=0;2*$SR" | bc) # 2 * Symbol Rate
		DECFEC=$(echo "scale=3;$FEC" | bc) # Turns FEC String to decimal
		RS=$(echo "scale=3;188 / 204" | bc) # Calculates Reed Solomon percentage
		TS=$(echo "scale=0;$DSR * $RS * $DECFEC" | bc) # Calculates Transport Stream rate for current SR/FEC
		echo "Transport Stream rate for current SR/FEC is:" $TS
		TSMAUD=$(echo "scale=0;$TS - 192" | bc) # TS Rate minus Audio rate
		VIDRATE=$(echo "scale=0;$TSMAUD * 0.75" | bc) # TS - Audio rate * 0.85 gives rough available Video Bitrate
		echo "Video bit-rate:" ${VIDRATE%.*}
		echo -e "\n"


		#Create config.txt - Encoder/PID Settings
		echo "videobitrate" ${VIDRATE%.*}"000" > config.txt
		echo "videocapture /dev/video0" >> config.txt
		echo "captureport " $INPUT >> config.txt
		echo "videopid" $VPID >> config.txt
		echo "audiopid" $APID >> config.txt
		echo "pmtpid" $PMTPID >> config.txt
		echo "pcrpid 256" >> config.txt
		echo "programfile program.txt" >> config.txt
		echo "txqlen 8000" >> config.txt

		#Create  program.txt  - Channel Name/EPG
		echo -e "[PROGRAM]\n"$CALLSIGN > program.txt
		echo -e "[PROVIDER]\nDigiLite,MK808" >> program.txt
		echo -e "[EVENT_TITLE]\n"$TITLE >> program.txt
		echo -e "[EVENT_TEXT]\n"$TEXT >> program.txt
		echo -e "[EVENT_DURATION]\n60" >> program.txt

		ps cax | grep dvbsenco8 > /dev/null
		if [ $? -eq 0 ]; then
  			killall dvbsenco8 > /dev/null 2>&1
			killall hcapture > /dev/null 2>&1
			killall pstots > /dev/null 2>&1
			killall dvbsiadd > /dev/null 2>&1
			killall dvbnullpadder > /dev/null 2>&1
		fi

		./hcapture | ./pstots | ./dvbsiadd | ./dvbnullpadder | ./dvbsenco8 > /dev/ttyUSB0 &

		#return status once running
		echo "Config ok" > /dev/ttyUSB1
		sleep 1
		
		echo -e "Live mode, Waiting control command..."

	fi
	sleep 0.1
done