JACK input/output are not persistent

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=579938

The JACK input and output instantiated by VLC come and go, as VLC opens the input item, or starts/stops the audio output pipeline. This does not work very well with the JACK model.

To work around this, I guess VLC would need a persistent interface plugin (or akin) that spawns the JACK connection and keeps it regardless of the VLC playlist state.

added Component::Core: Audio output Severity::normal Type::feature Version::master git labels

changed milestone to %Bugs paradize

added Component::Audio: other plugins label and removed Component::Core: Audio output label

changed the description

assigned to @Courmisch and unassigned @MigrationBot

added Component::Input: Linux/BSD audio/video label and removed Component::Audio: other plugins label

commit a20103b2a76ee13e55cba9b2164903eb911f964b Author: Rémi Denis-Courmont remi@remlab.net Date: Sat Oct 20 20:27:48 2012 +0300

aout: add distinct start/stop callbacks (refs [#4787](https://code.videolan.org/videolan/vlc/-/issues/4787), refs [#7601](https://code.videolan.org/videolan/vlc/-/issues/7601))

This would enable the input manager to hold an audio output plugin at
all times. Then it would be possible to keep track of output devices,
volume, policy and (JACK) routing continuously. For this to work,
outputs will need to be patched so that device selection and volume
handling works even when playing back.

Note though that this commit only introduces the change in the
audio_output_t interface; it does not implement the features above.

Original author: remi@remlab.net

commit b1c459e9 Author: Rémi Denis-Courmont remi@remlab.net Date: Sat Oct 20 20:27:48 2012 +0300

aout: add distinct start/stop callbacks (refs [#4787](https://code.videolan.org/videolan/vlc/-/issues/4787), refs [#7601](https://code.videolan.org/videolan/vlc/-/issues/7601))

This would enable the input manager to hold an audio output plugin at
all times. Then it would be possible to keep track of output devices,
volume, policy and (JACK) routing continuously. For this to work,
outputs will need to be patched so that device selection and volume
handling works even when playing back.

Note though that this commit only introduces the change in the
audio_output_t interface; it does not implement the features above.

Original author: remi@remlab.net

unassigned @Courmisch

Is this still the case for 2.1 ?

Replying to [comment:7 jb]:

Is this still the case for 2.1 ?

Yes.

changed milestone to %Features paradize

added Platform::GNU/Linux label

Replying to [comment:10 jb]:

JACK is not GNU/Linux specific.

And?

Replying to [comment:12 jb]:

And?

I assumed "Platform: GNU/Linux" meant "this behaviour is exclusive to GNU/Linux".

I did not change anything on that part.

Replying to [comment:14 jb]:

I did not change anything on that part.

Ah, didn't catch what it was before. Might as well leave it as GNU/Linux anyway, I doubt anyone is building this plugin for other platforms at the moment.

Maybe POSIX is better :)

added 1 deleted label and removed Platform::GNU/Linux label