jack.plumbing maintains a set of port connection rules and manages these as clients
register ports with JACK. Port names are implicitly bounded regular
expressions and support sub-expression patterns.
There are three rules:
connect ", " also-connect " and " connect-exclusive .
ensures that whenever
scsynth(1) is running any output ports it registers are connected to appropriate
ALSA playback ports. The connect rule only makes a connection if none
already exist.
ensures that when
jack.udp(1) is running in
send mode all signals that are ordinarily sent to the local audio interface
will also be sent to the network destination. The
also-connect aliasing applies to both the left and right hand side of
connect rules.
ensures that if SuperCollider and an
ardour(1) session with appropriate tracks are both running that SuperCollider
gets connected to ardour and disconnected from everything else.
This type of connection daemon has the following advantages over both
environment variables and command line arguments: 1. it does not
require any client connection support or logic at all, 2. it provides
a uniform user interface to all clients, and 3. it has a somewhat
declarative style.
This type of daemon is very lightweight and non-intrusive: it requires
no arguments, it runs from an unprivileged thread, if the rule set is
empty it is a no-op, it does not write any files, it does not require
any modification to clients or to how clients are started.
When a set of port registrations is made it checks the modification
time of the rule set files,
/etc/jack.plumbing " and " ~/.jack.plumbing , re-reads the rule set if it has been updated, then makes the JACK
graph obey the rules.
Any lines beginning with a semi-colon are ignored.
BUGS
The present implementation does not sort the rule set, rules must be
written in sequence, that is
connect-exclusive rules must come after
connect rules.
