From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Can ALSA invoke a Callback ?
Date: Fri, 26 Aug 2011 17:54:54 +0200
Message-ID: <4E57C1CE.7060900@ladisch.de>
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To: Ru Vuott <vuott@yahoo.it>
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Ru Vuott wrote:
> I'm using Alsa "Seq" functions.
> 
> My midi-program - obviously - does not know exactly when the extern midi event 'll arrive....
> Has it to read uninterruptedly his port, waiting for the events.... ?

This is done only in single-purpose command-line programs like arecordmidi.
When you have other events, you collect the file descriptors of all your
devices/pipes/whatever, and wait for all of them in a poll()-based loop.

How does your program handle events?  Or are you using a GUI framework?


Regards,
Clemens