#!/bin/sh
#
# Diverse Bristol audio routines.
# Copyright (c) by Nick Copeland <nickycopeland@hotmail.com> 1996,2011
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, see <http://www.gnu.org/licenses/>.
#
#set -x

args=$*

vers=@VERSION@

cli=0
engine=1
gui=1
quiet=0
verbose=0
jack=0
export JACK_START_SERVER=1
midi=seq
HELP=0
README=0

EMULATE=hammondB3
FREQ=0

#PORT=5028
# Randomise the port numbers, can be overridden by -port which would be a
# requirement for multitimbral
PORT=`date +%N`
PORT=`expr $PORT % 65536` >/dev/null 2>&1
if [ -z $PORT ]; then
	PORT=`date +%s`
	PORT=`expr $PORT % 65536` >/dev/null 2>&1
fi
if [ $PORT -lt 1024 ]; then
	PORT=`expr $PORT + 5028`
fi

valgrind=0
execme=1
liblist=0

host=net

engstatus=0
guistatus=0

JS=1
RATE=44100
DRIVER=@DEFAULT_AUDIO_FLAG@
COUNT=256

LOGO=no

#
# The following is configured by the autotools process.
#
BRISTOL_DIR=@BRISTOL_DIR@

#
# Whatever directory was called for startBristol we also neede in the PATH
#
PATH=${PATH}:`dirname $0`

showhelp()
{
	if [ $HELP -eq 3 ]; then
		brighton -V
		exit 0
	fi
	if [ $HELP -eq 2 ]; then
		brighton -h | less
		exit 0
	fi
	if [ $verbose = 1 ]; then
		# let the bristol gui give a verbose help text.
		engine=0
	else
		brighton -V
		echo
		echo "startBristol [-explorer|-mini|-memory|-hammond|-b3|-dx|-axxe|-odyssey|-2600|-mono|-poly|-juno|-prophet|-pro10|-pro52|-mixer|-vox|-rhodes|-rhodesbass|-obx|-obxa|-aks|<others>] [-oss|-alsa|-jack] [[-help|-h] [-verbose|-v]]"
		echo
		echo "Try 'startBristol -v|-h' for more verbose help output on device configuration."
		echo
		echo "Try 'startBristol -readme' for very verbose output"
		echo "Try 'startBristol -readme -mini' for info on specific emulator"
		echo
		echo "Try 'startBristol -b3' or 'startBristol -jack', for example, if you are unsure."
		echo
		echo "Q&A to nickycopeland@hotmail.com"
		echo "bugs, features, enhancements to http://sourceforge.net/projects/bristol"
		echo
		exit 0
	fi
}

if [ $# = 0 ]; then
	HELP=1
fi

# Nokey: Don't override BRISTOL if it's not already set
if [ -z "$BRISTOL" ]; then
	if [ -d "${BRISTOL_DIR}/memory" ]; then
		export BRISTOL=${BRISTOL_DIR}
	else
		# We should first take our basename and look for a binary
		BRISTOL=`dirname $0`
		BRISTOL=`dirname $BRISTOL`

		if [ ! -f $BRISTOL/bin/bristol ]; then
			#
			# Take a default
			#
			export BRISTOL=/opt/audio/bristol
		fi
	fi
fi
export BRISTOL

for index in $*; do
	if [ $index = "-stop" ]; then
		pkill bristol
		if [ $? != 0 ]; then
			pkill brighton
		fi
		exit 0
	fi
	if [ $index = "-exit" ]; then
		pkill bristol
		pkill brighton
		exit 0
	fi
	if [ $index = "-kill" ]; then
		pkill -f "\\$2"
		exit 0
	fi
	if [ $index = "-host" ]; then
		host=`echo $2 | awk -F: '{print $1}'`
		if [ $host = "unix" ]; then
			localport=`echo $2 | awk -F: '{print $2}'`
			if [ -z $localport ]; then
				localport=$PORT
			fi
		fi
	fi
	if [ $index = "-freqtweak" ]; then
		FREQ=$2
		if [ $FREQ != 0 -a -x /usr/bin/cpufreq-set -a $execme -eq 0 ]; then
			echo Setting min CPU speed to $FREQ
			cpufreq-set -d ${FREQ}
		fi
	fi
	if [ $index = "-count" ]; then
		COUNT=$2
	fi
	if [ $index = "-rc" ]; then
		BRISTOL_RC=/dev/null
	fi
	if [ $index = "-sleep" ]; then
		sleep $2
	fi
	if [ $index = "-emulate" ]; then
		EMULATE=$2
	fi
	if [ $index = "-port" ]; then
		PORT=$2
	fi
	if [ $index = "-cache" ]; then
		export BRISTOL_CACHE=$2
	fi
	if [ $index = "-memdump" ]; then
		export BRISTOL_DUMP=$2
	fi
	if [ $index = "--summary" ]; then
		brighton --summary
		exit 0
	fi
	if [ $index = "-summary" ]; then
		brighton -summary
		exit 0
	fi
	if [ $index = "-console" ]; then
		export BRISTOL_LOG_CONSOLE=true
	fi
	if [ $index = "-cli" ]; then
		cli=1
		execme=0
	fi
	if [ $index = "-exec" ]; then
		execme=0
	fi
	if [ $index = "-ladi" ]; then
		execme=1
	fi
	if [ $index = "-valgrind" ]; then
		valgrind=1
	fi
	if [ $index = "-debug" ]; then
		liblist=1
	fi
	if [ $index = "-liblist" ]; then
		liblist=1
	fi
	if [ $index = "-master" ]; then
		engine=0
	fi
	if [ $index = "-engine" ]; then
		engine=0
	fi
	if [ $index = "-gui" ]; then
		gui=0
	fi
	if [ $index = "-readme" ]; then
		README=1
	fi
	if [ $index = "-v" ]; then
		HELP=2
	fi
	if [ $index = "--v" ]; then
		HELP=2
	fi
	if [ $index = "-verbose" ]; then
		verbose=1
	fi
	if [ $index = "--verbose" ]; then
		verbose=1
	fi
	if [ $index = "-version" ]; then
		HELP=3
	fi
	if [ $index = "-V" ]; then
		HELP=3
	fi
	if [ $index = "-logo" ]; then
		LOGO=yes
	fi
	if [ $index = "-h" ]; then
		HELP=2
	fi
	if [ $index = "--h" ]; then
		HELP=2
	fi
	if [ $index = "-help" ]; then
		HELP=2
	fi
	if [ $index = "--help" ]; then
		HELP=2
	fi
	if [ $index = "-libtest" ]; then
		engine=0
	fi
	if [ $index = "-quiet" ]; then
		quiet=1
	fi
	if [ $index = "-q" ]; then
		quiet=1
	fi
	if [ $index = "-jsmuuid" ]; then
		export BRISTOL_AUTOCONN=false
	fi
	if [ $index = "-jackstats" ]; then
		JS=0
	fi
	if [ $index = "-jack" ]; then
		jack=1
		COUNT=1024
		DRIVER=-jack
	fi
	if [ $index = "-audio" ]; then
		DRIVER=-$2
	fi
	if [ $index = "-alsa" ]; then
		jack=0
		DRIVER=-alsa
	fi
	if [ $index = "-jackstart" ]; then
		unset JACK_START_SERVER
	fi
	shift
done

#
# As a note for anybody interested in reading this script, brighton also has
# a BRISTOL_CACHE directory for private memories, sequences and controller maps.
# Default is in $HOME/.bristol and we create this if it is not already made
#
if [ -z "$BRISTOL_CACHE" ]; then
	export BRISTOL_CACHE=${HOME}/.bristol
fi

if [ -z "$BRISTOL_DUMP" ]; then
	mkdir -p ${BRISTOL_CACHE}/memory
else
	if [ ! -d $BRISTOL_DUMP/memory/$EMULATE ]; then
		mkdir -p $BRISTOL_DUMP/memory/$EMULATE
		cp -f $BRISTOL_DIR/memory/$EMULATE/* $BRISTOL_DUMP/memory/$EMULATE
		cp -f $BRISTOL_CACHE/memory/$EMULATE/* $BRISTOL_DUMP/memory/$EMULATE
		echo created memory shadow in $BRISTOL_DUMP
	fi
	export BRISTOL_CACHE=$BRISTOL_DUMP
fi

PREARGS=
POSTARGS=
#
# Changed some of the processing to have tokens in the PREARGS file. We are
# looking for PREARGS and POSTARGS. If we don't find either of them then take
# the whole file which was the previous method and is equivalent to PREARGS
#
if [ -z "${BRISTOL_RC}" -a -f ${BRISTOL_CACHE}/bristolrc ]; then
	BRISTOL_RC=${BRISTOL_CACHE}/bristolrc
fi
if [ -f "${BRISTOL_RC}" ]; then
	egrep '(PREARGS|POSTARGS)' ${BRISTOL_RC} >/dev/null

	if [ $? -gt 0 ]; then
		PREARGS=`cat ${BRISTOL_RC}`
	else
		PREARGS=`awk -F= '/PREARGS/ {print $2}'  ${BRISTOL_RC}`
		POSTARGS=`awk -F= '/POSTARGS/ {print $2}'  ${BRISTOL_RC}`
	fi
fi

# Nokey: Does the BRISTOL directory actually exist?
if [ ! -d $BRISTOL ]; then
	# Apparently not. Let's try to make a guess as to where it is.

	# Try to find out how we were started. If this script was in
	#  the PATH of the user, the $0 should have a leading '/'.
	#  This leading '/' would also be there if this script was
	#  executed as /full/path/name/startBristol
	STARTUP=$0
	# If this script was started as ./"*whatever*" then we need
	#  to strip off the './' in order to accurately determine
	#  the BRISTOL directory
	if [ "$(echo $STARTUP | cut -c 1-2)" = "./" ]; then
		STARTUP=$(echo $STARTUP | cut -c 3-)
	fi
	
	if [ "$(echo $STARTUP | cut -c 1)" = "/" ]; then
		BIN_DIR=$(dirname $STARTUP)
	else
		BIN_DIR=$(dirname $PWD/$STARTUP)
	fi

	export BRISTOL=$(dirname $BIN_DIR)
	unset BIN_DIR STARTUP
fi

if [ ${README} -ge 1 ]; then
	brighton $args | less
	exit 0
fi

if [ ${HELP} -ge 1 ]; then
	showhelp
fi

#
# Try and get Jack driver information. If the daemon is running, use it. If
# user has a .jackdrc use that, otherwise use /etc/jackdrc
#
if [ ${DRIVER} = "-jack" ]; then 
	jack=1

	if [ $JS -ne 0 ]; then 
		JP=`bristoljackstats 2>&1`
		if [ $? -eq 0 ]; then
			JACKPARAMS=`echo $JP | awk '/JACKSTATS/'`
			RATE=`echo ${JACKPARAMS} | awk '{print $2}'`
			COUNT=`echo ${JACKPARAMS} | awk '{print $3}'`

			echo jackstats found -rate ${RATE} -count ${COUNT}
		fi
	else
		#
		# We should not really get here. If jack was requested but the daemon
		# could not be reached (we did not get feedback from bristoljackstats)
		# then larger issues will occur presently
		#
		# Thanks to Sylvain Robitaille for the next code.
		#
		# See if the process is running
		#
		# We should replace this with pgrep and do it for this user - if the
		# daemon is running with other rights we may not be able to connect.
		#
		JACKD=`ps ax | grep -w jackd | grep -vw grep` 

		#
		# Otherwise see what would be started
		#
		if [ -z "${JACKD}" ]; then 
			echo "jack driver requested, jackd not running" 

			if [ -f /etc/jackdrc ]; then
				echo "jack configuration found in /etc/jackdrc"
				JACKD=`cat /etc/jackdrc`
			fi

			if [ -f ~/.jackdrc ]; then
				echo "private jack configuration found in ~/.jackdrc"
				JACKD=`cat ~/.jackdrc`
			fi
		fi

		if [ -z "${JACKD}" ]; then 
			RATE=48000 
			COUNT=1024 
		else
			RATE=`echo ${JACKD} |grep -o -- '-r[0-9][0-9]*' |sed 's/^-r//'` 

			if [ -z "${RATE}" ]; then 
				# assume Jackd's default rate: 
				RATE=48000 
			fi 

			#COUNT=`echo ${JACKD} |grep -o -- '-p[0-9][0-9]*' |sed 's/^-p//'` 
			COUNT=`echo ${JACKD} |grep -o -- '-p[0-9][0-9]*' |tail -n1 |sed 's/^-p//'`

			if [ -z "${COUNT}" ]; then 
				# assume Jackd's default count: 
				COUNT=1024 
			fi 
		fi
	fi
fi

#
# If slabhome already exists, we should take it rather than this definition.
#
export SLAB_HOME=$BRISTOL
export BRIGHTON=$BRISTOL


if [ ${liblist} != 0 ]; then
	echo
	echo '*** bristol libraries ***'
	echo
	ldd `which bristol`
	echo '*** brighton libraries ***'
	echo
	ldd `which brighton`
	echo
fi

if [ $jack -eq 1 ]; then
	ldd `which bristol` | grep jack > /dev/null 2>&1
	if [ $? -ne 0 ]; then
		echo Requested Jack drivers, not compiled into bristol
		exit -1
	fi
fi

if [ ${LOGO} = "yes" ]; then
	#
	# Just to make sure
	#
	echo
	echo "Bristol is about to start."
	echo
	echo "This program is totally unrelated to ANY of the companies that produced"
	echo "the original instruments emulated by bristol, and none of the original"
	echo "manufacturers in ANY way endorse this product."
	echo

	sleep 1
fi

#
# Requesting an engine. This means we need a free TCP port. Our default is 
# 5028 and if it is not free then search for one from there
#
if [ $engine = 1 ]; then
	if [ $host = "unix" ]; then
		echo checking availability of host port $localport
		ls /tmp/br.$localport >/dev/null 2>&1
		if [ $? -eq 0 ]; then
			echo "host port looked busy, unlinking"
			rm -f /tmp/br.$localport
		fi
	else
		echo checking availability of TCP port $PORT
		netstat -taln | awk '{print $4}' | grep $PORT > /dev/null
		while [ $? -eq 0 ]; do
			echo -n "port looked busy, trying "
			PORT=`expr $PORT + 1`
			echo $PORT
			netstat -taln | grep $PORT > /dev/null
		done
		if [ ${PORT} -lt 1024 -a ${USER} != "root" ]; then
				echo you may not have permissions for ports less than 1024
		else
			echo using port $PORT
		fi
	fi
fi

#
# Start up the GUI
#
if [ $cli = 1 ]; then
	if [ $engine = 1 ]; then
		bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS} &
	fi
	export BRISTOL_LOG_CONSOLE=true
	brighton ${PREARGS} $args -port ${PORT} ${POSTARGS}
else
	if [ $gui = 1 ]; then
		if [ $engine = 1 ]; then
			if [ $quiet = 0 ]; then
				brighton ${PREARGS} $args -port ${PORT} ${POSTARGS} &
			else
				brighton ${PREARGS} $args -port ${PORT} ${POSTARGS} > /dev/null 2>&1 &
			fi
		else
			if [ $quiet = 0 ]; then
				if [ $execme = 0 ]; then
					if [ $valgrind = 0 ]; then
						brighton ${PREARGS} $args -port ${PORT} ${POSTARGS}
					else
						valgrind --leak-check=full -v --show-reachable=yes --track-origins=yes brighton $args -port ${PORT} ${POSTARGS}
					fi
				else
					exec brighton ${PREARGS} $args -port ${PORT} ${POSTARGS}
				fi
				guistatus=$?
			else
				if [ $execme = 0 ]; then
					brighton ${PREARGS} $args -port ${PORT} ${POSTARGS} > /dev/null 2>&1
				else
					exec brighton ${PREARGS} $args -port ${PORT} ${POSTARGS} > /dev/null 2>&1
				fi
				guistatus=$?
			fi
		fi
	fi

	#
	# the bristol engine has flags for -oss or -alsa drivers, -preload buffers of
	# -count samples:
	#	bristol -preload 4 -count 256 [-oss]
	#
	if [ $engine = 1 ]; then
		if [ $quiet = 0 ]; then
			if [ $valgrind = 0 ]; then
				if [ $execme = 0 ]; then
					bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS}
					engstatus=$?
				else
					exec bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS}
				fi
			else
				valgrind --leak-check=full -v --show-reachable=yes --track-origins=yes bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS}
				engstatus=$?
			fi
		else
			if [ $execme = 0 ]; then
				bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS} > /dev/null 2>&1
			else
				exec bristol -rate ${RATE} -count ${COUNT} ${PREARGS} $args -port $PORT ${POSTARGS} > /dev/null 2>&1
			fi
			engstatus=$?
		fi
	fi
fi

# Make sure we have the children returned, prevents ugly delayed output
if [ $engine = 1 ]; then
	wait % >/dev/null 2>&1
fi
if [ $gui = 1 ]; then
	wait % >/dev/null 2>&1
fi

sleep 1

if [ $FREQ != 0 -a -x /usr/bin/cpufreq-set ]; then
	cpufreq-set -d 250MHz
fi
# This could be a lot more intelligent but it will work. We need to remove any
# dangling sockets. Alternatively just delete the files, the check for their
# existance is superfluous
rm -f /tmp/br.* >/dev/null 2>&1

 exit `expr $engstatus + $guistatus`