Trying to make gkrellm work with ALSA.

Trying to make gkrellm work with ALSA.

[Nathan Morell]

Hi guys, this is my first note to the list so I'm going to try and get 
some background information to start on this task.

After talking with Bill, the author of gkrellm, I need to find out if 
ALSA supports 'callbacks' (a new concept in c++ to me).

quoted from our email:
----------
A while back I looked at ALSA 0.9 support for gkrellmss but there was no
callback mechanism as there was in ALSA 0.5. Maybe this has changed and
I'll look again (let me know if you have any info on this), but short of
that, it takes a sound server that provides such callbacks. Currently
that's ESD, but I'll probably be adding Jack support fairly soon.
----------


other then the above, and taking a close look at the original source to 
the gkrellm-sound plugin, could anybody offer some advice on my project?

thanks in advance,
--Nathan


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Re: Trying to make gkrellm work with ALSA.

[Arve Knudsen]

Hi

You could always have a look at the v19 (development) branch of PortAudio 
(www.portaudio.com), which offers an abstraction layer on top of host 
APIs. ALSA is well supported under v19 (I am one of the authors), while 
the OSS and JACK layers might need some work (although I'm not totally a 
jour on their status). Anyway, PortAudio has both callback driven and 
blocking interfaces, and there is a C++ wrapper called PaCpp (supports 
class member callbacks from what I remember). If nothing else, you could 
have a look at how the callback implementation on top of ALSA is done.

Hope this helps

Arve Knudsen

On Wed, 04 Feb 2004 18:29:46 -0600, Nathan Morell <frizop@charter.net> 
wrote:

> Hi guys, this is my first note to the list so I'm going to try and get 
> some background information to start on this task.
>
> After talking with Bill, the author of gkrellm, I need to find out if 
> ALSA supports 'callbacks' (a new concept in c++ to me).
>
> quoted from our email:
> ----------
> A while back I looked at ALSA 0.9 support for gkrellmss but there was no
> callback mechanism as there was in ALSA 0.5. Maybe this has changed and
> I'll look again (let me know if you have any info on this), but short of
> that, it takes a sound server that provides such callbacks. Currently
> that's ESD, but I'll probably be adding Jack support fairly soon.
> ----------
>
>
> other then the above, and taking a close look at the original source to 
> the gkrellm-sound plugin, could anybody offer some advice on my project?
>
> thanks in advance,
> --Nathan


-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration
See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn