In-process JACK clients are a very special case and almost nobody implements or uses them. They are like plugins for the JACK server, and that's not really the point of JACK (which was designed to connect distinct processes).

Look at the out-of-process ("normal") example(s) instead.

On Tue, Jan 9, 2018 at 9:39 PM, Andrew Voelkel <jandyman.voelkel@gmail.com> wrote:

Hi and thanks.

 

So looking at the in-process example, I’m guessing it compiles to a dynamic library which the server loads? If so, how does the server know the capabilities of the in-process client.

 

I’m coming from writing VST plug-ins on Windows or Audio Units on Apple platforms, in case I sound confused.

 

I’m also having trouble getting used to the idea of the client being the plug in, normally I would think the client would be what is called the “host” on Windows or Apple, and the plug-in would closer to a “server”. But here the terminology is reversed. Am I understanding correctly? The “client” in JACK is the plug-in (for in-process use), correct?

 

Finally, I’d like to get started seeing whether the eco-system works for low latency with existing apps and components for diving in. Is AVLinux the way to go, and is there any reason it will not work on BeagleBone?

 

I’m not a Linux expert in case you can’t already tell! It’s not that I have zero experience, but sometimes it’s close, depending on context.

 

But I do know audio, and operating system design, and threading, and SIMD, and etc.

 

  • Andy

 

From: Linux-audio-user <linux-audio-user-bounces@lists.linuxaudio.org> on behalf of Paul Davis <paul@linuxaudiosystems.com>
Date: Tuesday, January 9, 2018 at 4:41 PM
To: Benoît Rouits <brouits@free.fr>
Cc: linux-audio-user <linux-audio-user@lists.linuxaudio.org>
Subject: Re: [LAU] How to get started writing a JACK app?

 

please. not sourceforge.

JACK code lives on github ...  https://github.com/jackaudio/example-clients

 

On Tue, Jan 9, 2018 at 6:21 PM, Benoît Rouits <brouits@free.fr> wrote:

Hello  Andy

as a starting point, you could look at:

http://jackit.sourceforge.net/cgi-bin/lxr/http/source/example-clients/

This is C client code samples for jack.

HTH,
 Benoît

Le 09/01/2018 à 16:19, Andrew Voelkel a écrit :
>
>     Hi,____
>
>     __ __
>
>     I’m new to this list. I’m thinking of giving low latency real time
>     audio in Linux another try after my last unsuccessful attempt a few
>     years ago. My goal is to put some of my own DSP code into a hardware
>     appliance and use it to process audio signals during music
>     rehearsals and performances.____
>
>     __ __
>
>     I think this boils down to getting an appropriate distro, getting
>     JACK working in a low latency configuration with a multichannel USB
>     interface. And then …____
>
>     __ __
>
>     Writing a JACK app to process the audio. ____
>
>     __ __
>
>     I’ve done some googling and found a lot about _/using/_ JACK, but
>     not much about writing a JACK app. ____
>
>     __ __
>
>     Are there any examples or tutorials out there?____
>
>     __ __
>
>     I’m already up to speed on doing C++ cross development with Eclipse.____
>
>     __ __
>
>     I’ve got a BeagleBone black sitting around here I could use to
>     experiment.____
>
>     __ __
>
>       * Andy____

>
>
>
>
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@lists.linuxaudio.org
> https://lists.linuxaudio.org/listinfo/linux-audio-user
>
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