sidstart

#!/bin/bash
#
# Tunable parameters for the receiver
#
# Sample rate--no reason to change this
#

killem ()
{
	kill $synproc >/dev/null 2>&1
	kill $sidhproc >/dev/null 2>&1
	killall synoptic_reader >/dev/null 2>&1
	killall sidhandler >/dev/null 2>&1
	exit
}
SRATE=96000
#
# Channel bandwidth -- good for FSK/MSK signals
#
BANDWIDTH=300

#
# Post source gain
#
GAIN=1

#
# Full GUI, 4 channels, single-channel demod, complex synoptic output
#
TYPE=full



#
# We keep 1-in-$SYN_RATIO baseband samples
#
SYN_RATIO=10

#
# Post-detector integration time, seconds
#
INTEG=5

HWNAME=plughw:0,0
OHWNAME=hw:1,0

AWID=2.0e3
ASTART=23.0e3

#
# Which channel for demodulation (full version only!)
#
DEMOD_CHAN=-1

NET=no
NETCHAN=0
NETSEND=no
COMPRESS=no
HZ=60

if [ -e $HOME/.sidconfig ]
then
	. $HOME/.sidconfig
fi

#
# Parse options
#
while [ "@@" != "@$1@" ]; do
	case "$1" in
	
		-gain|-g)
		GAIN=$2
		shift 2
		;;
		
		-r|-rate|-srate)
		SRATE=$2
		shift 2
		;;
		
		-ratio)
		SYN_RATIO=$2
		shift 2
		;;
		
		-integ|-i)
		INTEG=$2
		shift 2
		;;
		
		-hw|-I|-hardware|-device)
		HWNAME=$2
		shift 2
		;;
		
		-ohw|-O|-odevice|-ohardware)
		OHWNAME=$2
		shift 2
		;;

		-hz)
		HZ=$2
		shift 2
		;;
		
		-h|-help)
		cat <<"!EOF!"
Usage: sidstart [options] freq1 freq2 freq3 freq4

-x|-slow|-sheeva      run on slower platform
-gain|-g              set gain
-r|-rate|-srate       sample rate: 96000 or 192000 is typical
-ratio                synoptic sampling ratio: 10 to 30 is typical
-i|-integ             integration time, in seconds 5 to 10 is typical
-hw|-I|-hardware      which soundcard hardware to use for input: plughw:0,0 etc
-ohw|-O|-ohardware    which soundcard hardware to use for output: plughw:1,0 etc
-hz                   local power line frequency: 60 or 50 are typical
!EOF!
		shift
		exit
		;;
   
   
		
		[0123456789][.0123456789]*)
		plist=`echo $plist $1`
		shift
		;;
		
		*)
		echo Unknown parameter: $1
		exit
	esac
done

#
# Number of samples in a synoptic baseband sample
#
# Two seconds worth
SYN_LEN=`expr $SRATE '*' 2`

#
# Shouldn't need to touch anything below here
#
PATH=$PATH:$HOME/bin:.
export PATH

P=2.6
python -V 2>tmp$$
pv=`cat tmp$$|sed -e 's/Python  *//'`
rm -f tmp$$

case $pv in
	2.6*)
		P=2.6
		;;
	2.7*)
		P=2.7
		;;
esac

M=""

if [ -f /etc/fedora-release ]
then
	if [ `uname -m` = x86_64 ]
	then
		M=64
	fi
fi

PYTHONPATH=/usr/local/lib${M}/python${P}/site-packages
PYTHONPATH=$PYTHONPATH:/usr/local/lib${M}/python${P}/dist-packages:$HOME/bin:.


export PYTHONPATH

if [ ! -d $HOME/sid_data ]
then
	mkdir $HOME/sid_data
fi

cd $HOME/sid_data

#
# Set our freq list
#
flist=""
cchan=0
if [ "@$plist@" != "@@" ]
then
	cchan=1
	list=""
	flist=""
	for freq in `echo $plist`
	do
		flist=`echo $flist --f${cchan} $freq `
		cchan=`expr $cchan + 1`
		check=`echo $freq|awk '
			/./ {if ($1 > (SRATE/2.1)) print "BAD"
				 else if ($1 < BW/2) print "BAD"
				 else print "OK"
			 }' SRATE=$SRATE BW=$BANDWIDTH`
		if [ $check = "BAD" ]
		then
			echo "Frequency of" $freq "is invalid for sample rate of" $SRATE "and bandwidth" $BANDWIDTH
			echo "Try frequencies between" `expr $BANDWIDTH / 2` "and" `expr $SRATE / 2 - '(' $SRATE / 20 ')'`
			exit
		fi
	done
elif [ "@$F0@" != "@@" ]
then
	flist="--f1 $F0 --f2 $F1 --f3 $F2 --f4 $F3 --f5 $F4 --f6 $F5 "
	cchan=6
fi


if [ $cchan -gt 7 ]
then
	echo Too many channels specified for regular version
	exit
fi

#
# Destroy previous FIFOs (named pipes)
#
rm -f sid_ch?.dat sid_total.dat
rm -f synoptic_output

#
# Make FIFOS
#
mkfifo sid_ch1.dat sid_ch2.dat sid_ch3.dat sid_ch4.dat sid_ch5.dat sid_ch6.dat
mkfifo synoptic_output

#
# Startup up readers for the FIFO files
#

#
# Reader for full processes four channels, otherwise two channels
#
if [ "@" = "@" ]
then

	if [ $TYPE = "full" -o $TYPE = "FULL" ]
	then
		sidhandler sid_ch1.dat sid_ch2.dat sid_ch3.dat sid_ch4.dat sid_ch5.dat sid_ch6.dat &
	else
		sidhandler sid_ch1.dat sid_ch2.dat &
	fi

	sidhproc=$!

	#
	# Full version uses complex-float, while "slow" version uses real-float
	#  so we have to fool synpotic_reader into "doing the right thing"
	#
	if [ $TYPE = "full" -o $TYPE = "FULL" ]
	then
		synoptic_reader synoptic_output $SYN_LEN &
	else
		synoptic_reader synoptic_output $SRATE &
	fi

	synproc=$!
fi
	
if [ $TYPE = "full" -o TYPE = "FULL" ]
then
		FILE=sidAudioFifo-0
		rm -f $FILE
		mkfifo $FILE
		
		trap 'killem' ERR
		trap 'killem' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
		audioSIDnetRcvr.py --filename $FILE --samp-rate $SRATE  \
		--synoptic-ratio $SYN_RATIO --synoptic-length $SYN_LEN \
		`echo $flist` \
		 --integ $INTEG --hz $HZ --igain $GAIN --ohwname $OHWNAME --hwname $HWNAME \
		--audio-shift $ASTART --audio-width $AWID --cfn $HOME/.sidconfig
fi

kill $synproc >/dev/null 2>&1
kill $sidhproc >/dev/null 2>&1