On Friday 12 October 2007, Simon Williams wrote:
In my attempt to stop the flipping xruns I get
even from a really simple
jack/fluidsynth (with 6.5mb soundfont) setup, I'm going to see if I can
get it to run without xruns at all- so I'm going to stop the X server
(which takes up quite a lot of cpu and memory).
Before I can do this, I need to work out how on earth to connect
fluidsynth to alsa_pcm without qjackctl. Why are there no man pages or
--help or anything for jack_connect, etc? I've tried the obvious:
"jack_connect fluidsynth alsa_pcm", but that doesn't work and without
any usage information whatsoever I'm completely stuffed. Also, a command
line list of port names that can be connected would be nice.
Add the stuff below to your bash auto completion setup [in ubuntu
it's /etc/bash_completion.d/jackd]. This way you can simply use tab to
autocomplete ports, e.g.:
~$ jack_connect [hit tab tab]
~$ jack_connect alsa_pcm\:capture_
alsa_pcm:capture_1 alsa_pcm:capture_2 alsa_pcm:capture_6
alsa_pcm:capture_10 alsa_pcm:capture_3 alsa_pcm:capture_7
alsa_pcm:capture_11 alsa_pcm:capture_4 alsa_pcm:capture_8
alsa_pcm:capture_12 alsa_pcm:capture_5 alsa_pcm:capture_9
#-*- mode: shell-script;-*-
# Inputs:
# $1 -- name of the command whose arguments are being completed
# $2 -- word being completed
# $3 -- word preceding the word being completed
# $COMP_LINE -- current command line
# $COMP_PONT -- cursor position
# $COMP_WORDS -- array containing individual words in the current
# command line
# $COMP_CWORD -- index into ${COMP_WORDS} of the word containing the
# current cursor position
# Output:
# COMPREPLY array variable contains possible completions
# Syntax:
# jack_connect <src_port> <dst_port>
# jack_disconnect <src_port> <dst_port>
# jackd [options] -d backend [backend-parameters]
# jackstart [options] -d backend [backend-parameters]
# Bugs/Todo:
# jack_{dis,}connect should support for spaces in port names
# restrict jack_disconnect completions to existing connections
# Bugreports: Paul Brossier <piem(a)altern.org>
have jack_connect &&
_jack_lsp_type() {
jack_lsp -p 2>/dev/null | grep -B1 $1 | \
grep -v 'properties.*,$' | grep -v ^-- \
| sed 's/\([\/ :]\)/\\\1/g'
#| sed 's/\([\\: ]\)/\\\1/g'
#| sed 's/\(.*\)/"\1"/g'
}
have jackd &&
_jackd_driver_help() {
jackd -d $1 --help 2> /dev/null | grep - | \
sed 's/-\(.*\), --\([^\ .]*\) *\(.*\)/-\1 --\2/'
}
have jack_connect &&
_jack_connections() {
local cur prev output IFS=$'\n'
COMPREPLY=()
cur=${COMP_WORDS[COMP_CWORD]}
prev=${COMP_WORDS[COMP_CWORD-1]}
# check if this is the first argument
if [[ "$1" == "$prev" ]]; then
COMPREPLY=( $( compgen -W "$(_jack_lsp_type output)" -- $cur ) )
else
COMPREPLY=( $( compgen -W "$(_jack_lsp_type input)" -- $cur ) )
fi
return 0
}
have jackd &&
_jackd()
{
local cur prev special
COMPREPLY=()
cur=${COMP_WORDS[COMP_CWORD]}
prev=${COMP_WORDS[COMP_CWORD-1]}
# check if backend was specified
for (( i=0; i < ${#COMP_WORDS[@]}-1; i++ )); do
if [[ ${COMP_WORDS[i]} == @(alsa|dummy|oss|coreaudio|portaudio) ]]; then
special=${COMP_WORDS[i]}
fi
done
# list backends
if [[ "$prev" == -d || "$prev" == --driver ]]; then
COMPREPLY=( $( compgen -W 'alsa dummy oss coreaudio
portaudio' -- $cur ) )
# list backend specific options
elif [ -n "$special" ]; then
COMPREPLY=( $( compgen -W '`_jackd_driver_help
$special` --help' -- $cur ) )
# list common options
else
COMPREPLY=( $( compgen -W '--help -h \
--driver -d \
--realtime -R \
--realtime-priority -P \
--name -n \
--no-mlock -m \
--unlock -u \
--timeout -t \
--port-max -p \
--verbose -v \
--silent -s \
--version -V' -- $cur ) )
fi
return 0
}
[ "$have" ] && complete -F _jack_connections $filenames jack_connect
[ "$have" ] && complete -F _jack_connections $filenames jack_disconnect
[ "$have" ] && complete -F _jackd $filenames jackd
[ "$have" ] && complete -F _jackd $filenames jackstart