[LAD] Jack MTC/MMC slaving

Nedko Arnaudov nedko at arnaudov.name
Tue Nov 11 12:59:46 UTC 2008

Stéphane Letz <letz at grame.fr> writes:

> Le 11 nov. 08 à 13:48, Nedko Arnaudov a écrit :
>> "Alex Montgomery" <apmontgomery at gmail.com> writes:
>>> Currently jackctlmmc supports the "play", "stop", and "rewind"
>>> messages from
>>> MMC, and I'm going to play with the code to see if I can add
>>> support for
>>> "locate" using jack_transport_locate() so that players can have a
>>> primitive
>>> seek-to type of function. I think that even this limited subset of
>>> MMC
>>> functionality is very desirable for linux audio engineers. I just
>>> want to be
>>> able to sit at my 8-track with my guitar and play/stop, rewind,
>>> and maybe
>>> seek around without having to keep clicking a mouse on a JACK app.
>> I already have git repository for jackctlmmc. If you are interested I
>> can make it public. Before importing it to git, I had the source of
>> the
>> quickly hacked tool in my local filesystem (no version control at
>> all).
>>> I'm surprised that jackctlmmc doesn't seem to be that widely used
>>> (I can't
>>> find any packages for it in the major linux distros, and it only
>>> seems to be
>>> distributed via source code) when it provides such useful
>>> functionality. I'd
>>> love to see it's functionality integrated into a GUI app like
>>> QJackCtl
>>> (which already has JACK transport buttons for play, rewind, fast-
>>> forward)
>>> instead of being a console application, but that's a subject for
>>> another
>>> email.
>> I think jackctlmmc can be made to be compilable as inprocess client
>> too.
> Good idea.
>> Paul, Stephane and others, do you think we should have different
>> directories for jack1 and jack2 drivers/internal clients?
> Drivera are definitively a lot different between  jack1 and jack2  and
> internal clients a bit (a new "jack_internal_initialize"  function to
> be used when internal clients are loaded using the new  jack2 control
> API (or jackdbus))
> So I don't see too much how they could *not* stay separated....

So we should install jack2 drivers and internal clients in
<prefix>/lib/jack2 instead of <prefix>/lib/jack ?

Thus out of tree internal clients will work for version they were
compiled. Still this does not fix the issue binary interface changes
between versions.

Nedko Arnaudov <GnuPG KeyID: DE1716B0>
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