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162 lines
4.6 KiB
Groff
162 lines
4.6 KiB
Groff
'\" t
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.\" Title: jack-plumbing
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.\" Author: Rohan Drape <rd@slavepianos.org>
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.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
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.\" Date: 06/16/2013
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.\" Manual: \ \&
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.\" Source: \ \&
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.\" Language: English
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.\"
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.TH "JACK\-PLUMBING" "1" "06/16/2013" "\ \&" "\ \&"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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jack-plumbing \- JACK Plumbing Daemon
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.SH "SYNOPSIS"
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.sp
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jack\-plumbing [options] [rule\-files]
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.SH "OPTIONS"
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.sp
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\fB\-d\fR : Do not operate as a daemon\&.
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.sp
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\fB\-o\fR : Do not load ordinary rule files\&.
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.sp
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\fB\-q\fR : Quiet operation\&.
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.sp
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\fB\-u\fR : Set the time, in micro\-seconds, that must elapse after a connection notification to indicate the end of a notification set (default=30000)\&. This is an optimization switch\&.
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.SH "DESCRIPTION"
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.sp
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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\&.
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.sp
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There are four rules: connect, disconnect, also\-connect and connect\-exclusive\&.
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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(connect "SuperCollider:out_(\&.*)" "system:playback_\e1")
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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This connect rule 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\&.
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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(also\-connect "system:playback_1" "jack\-udp\-[0\-9]*:in_1")
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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This also\-connect rule 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\&.
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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(connect\-exclusive "SuperCollider:out_(\&.*)" "ardour:sc3_in_\e1/in 1")
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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This connect\-exclusive rule 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\&.
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.sp
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This type of connection daemon has the following advantages over both environment variables and command line arguments:
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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it does not require any client connection support or logic at all
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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it provides a uniform user interface to all clients
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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it has a somewhat declarative style
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.RE
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.sp
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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\&.
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.sp
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When a set of port registrations is made it checks the modification time of the rule set files, \fI/etc/jack\-plumbing\fR and \fI~/\&.jack\-plumbing\fR, and any files specified by the user, rereads the rule set if it has been updated, then makes the JACK graph obey the rules\&.
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.sp
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Any lines beginning with a semi\-colon are ignored\&.
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.sp
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The rule set is sorted, disconnect rules are applied first, then connect rules, then connect\-exclusive rules\&.
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.SH "FILES"
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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/etc/jack\-plumbing
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.RE
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.sp
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.RS 4
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.ie n \{\
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\h'-04'\(bu\h'+03'\c
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.\}
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.el \{\
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.sp -1
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.IP \(bu 2.3
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.\}
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~/\&.jack\-plumbing
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.RE
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.SH "AUTHOR"
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.sp
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Written by Rohan Drape http://slavepianos\&.org/rd/
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.SH "SEE ALSO"
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.sp
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jackd(1)
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.SH "AUTHOR"
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.PP
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\fBRohan Drape\fR <\&rd@slavepianos\&.org\&>
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.RS 4
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Author.
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.RE
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