# jackd.service for embedded headless machines with USB sound card or other.
# done for iemKit domeplayer
# the idea is that other services depending on this will start audio applications 
# for installations
#
# (c) GPL, 2016 IEM, Winfried Ritsch 
# see https://git.iem.at:/cm/iemKit
#

[Unit]
Description=JACKD
After=sound.target usb-reset.service multi-user.target
Before=stream.service
Requires=multi-user.target
AllowIsolate=yes

[Service]

#could not get dbus to work without X11 DISPLAY. so using dbus-run-session now
#run as user algo for security reasons, should be nobody in future
User=algo
Group=audio

# If they are declared in /etc/limits.d/audio.conf, they are not needed here
LimitRTPRIO=96
LimitRTTIME=infinity
LimitMEMLOCK=infinity

# Additional tuning if needed on small embedded devices
#MemoryMax=512M
#CPUSchedulingPolicy=rr
#CPUSchedulingPriority=95
#CPUAffinity=1  ;
#LimitNPROC=1
#LimitCPU=1024
#ControlGroupAttribute=memory.swappiness 10
# setting parameter in here 
Environment="DEVICE=hw:0"
Environment="NAME=JACKD"
Environment="RATE=44100"
Environment="NPERIODS=2"
Environment="PERIOD=1024"
# or read from a file:
#EnvironmentFile=-/etc/jack/%i

# start service
ExecStart= /usr/bin/dbus-run-session /usr/bin/jackd -d alsa --device ${DEVICE} \
                      --rate ${RATE} --nperiods ${NPERIODS} --period ${PERIOD}
ExecStop=/usr/bin/killall /usr/bin/jackd
SuccessExitStatus=0
#RemainAfterExit=true

[Install]
WantedBy=multi-user.target
#WantedBy=jack.target
RequiredBy=jackd.target