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From: Clemens Ladisch <clemens@ladisch.de>
To: Ru Vuott <vuott@yahoo.it>
Cc: alsa-devel@alsa-project.org
Subject: Re: Can ALSA invoke a Callback ?
Date: Fri, 26 Aug 2011 16:34:00 +0200	[thread overview]
Message-ID: <4E57AED8.7040408@ladisch.de> (raw)
In-Reply-To: <1314368677.30767.YahooMailClassic@web29606.mail.ird.yahoo.com>

Ru Vuott wrote:
> I would like to know how I can ask ALSA to invoke a "Callback"
> function when an Midi event arrives from an extern-device.

This is not possible.

The mechanism usually used for this is to check for events from the
MIDI device in the main message loop (which must be based on poll() or
select()).

Are you using raw MIDI or sequencer devices?  How does your program's
event handling work?


Regards,
Clemens

  reply	other threads:[~2011-08-26 14:34 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-26 14:24 Can ALSA invoke a Callback ? Ru Vuott
2011-08-26 14:34 ` Clemens Ladisch [this message]
     [not found] <1314369942.41651.YahooMailClassic@web29613.mail.ird.yahoo.com>
2011-08-26 15:54 ` Clemens Ladisch
     [not found] <1314385032.22194.YahooMailClassic@web29616.mail.ird.yahoo.com>
2011-08-26 22:03 ` Clemens Ladisch
     [not found] <1314566910.38637.YahooMailClassic@web29620.mail.ird.yahoo.com>
2011-08-29  9:12 ` Clemens Ladisch
     [not found] <1314978948.16516.YahooMailClassic@web29618.mail.ird.yahoo.com>
2011-09-02 16:32 ` Clemens Ladisch

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