Hi everyone.
I'm trying to streamline the integration of Rivendell 4 on lubuntu or
other debian based distros using modern tools such as systemd and DBus.
Now, qjackctl and the packages jackd2 uses Dbus to launch jack daemon by
default. This provides some cool features, notably the handshaking with
pulseaudio in order to release the alsa device from pulse and let jack
use it instead, and also the automatic connection of pulseaudio into
jack as a client.
The way qjackctl launches jack is by issuing the "/usr/bin/jackdbus
auto", then setups and actually starts jack through the DBUS interface
with /usr/bin/jack_control
I would like to mimic this behavior in order to make rivendell service
(well... caed) start Jack this way with an external scirpt, but it fails
when trying to connect jack. The logfile says "Unable to communicate
with JACK server". Obviously, the actual jack server may take too much
time to launch and it is not ready when caed tries to connect. DBus
provides a way to check the status of jack. Maybe just a pause could be
sufficient to allow jack to start before trying to connect to it.
Would it be possible to take this way of launching jack through DBus
into account so that it can be started at boot time with caed instead of
waiting for a user session to begin ?
By the way, I tweaked systemd service for rivendell (sudo systemctl edit
rivendell) in order to start the daemons with another user (actually the
user who starts the session afterwards to use Rivendell tools) so that I
can launch qjackctl or other tools with this user and modify the
patching of clients without being forced to connect as root, which is
not recommended on ubuntu/debian. Maybe, it could be useful to be able
to select the user for each sub-service in rd.conf, and drop privileges
while starting rivendell service according to this.
Thanks a lot for your answers/ideas. Take care
Florent
_______________________________________________
Rivendell-dev mailing list
Rivendell-dev@lists.rivendellaudio.org
http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
