#!/bin/bash
#
# by: gonX <gonX@overclocked.net>
#
# jackd helper
# for use with mpd/mpc
#
# pauses mpd to close sound output
# then starts jackd with pre-set command line
# then unpauses mpd to reopen sound output
#
# that is unless jackd is already running, in which case it will:
# kill jackd
# unpause mpd
#
# this will obviously only work with a working mpd config that has both alsa/oss and jack set up to receive output
#
# this is really useful when I want to use software sound modeling, since I need jackd for that
#
# in the future I might make it so that it checks current status of mpd so it doesn't play no matter what (like it does now)
#

JACKBACKEND=alsa
JACKOPTS='-r 48000 -p 160'
if [ ! -e `pidof jackd` ]; then
	mpc pause > /dev/null && sleep 0.4s
	killall jackd

	#apparently mpd doesn't like it if you don't restart it first - I can't figure out why
	/etc/rc.d/mpd restart > /dev/null
	mpc toggle > /dev/null
	
	echo 'JACKD disabled'
else
	mpc pause > /dev/null
	jackd -R -d $JACKBACKEND $JACKOPTS > /dev/null &
	sleep 0.5s && mpc play > /dev/null

	echo 'Enabled JACKD'
fi