Re: [LAU] Jack command line connect

Florian Schmidt wrote:
> 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@email-addr-hidden>
>
> 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
>
>
>
>
thanks florian, this is really a useful script!

cheers,
doc
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Received on Sat Oct 13 16:15:02 2007