From: Clemens Ladisch <clemens@ladisch.de>
To: "R. Dresens" <chromisx@nedlinux.nl>
Cc: alsa-devel@alsa-project.org
Subject: Re: Detecting new alsa sequencer clients (with some event loop) so that i can subscribe them
Date: Tue, 01 Apr 2008 09:01:50 +0200 [thread overview]
Message-ID: <47F1DDDE.5090703@ladisch.de> (raw)
In-Reply-To: <20080401034801.7ad2696d.chromisx@nedlinux.nl>
R. Dresens wrote:
> I'm currently writing an application that will be able to 'auto
> subscribe' itself to a certain sequencer client when that client
> becomes available to the system. I want (for example) to be able to
> plug in a USB MIDI interface, and when I do that then my application
> detects this and does a subscription on it, just like aconnect would
> do.
>
> A possible solution is polling; every second or so, i could generate a
> list of clients with snd_seq_query_next_client and look for a certain
> client name (libpcre comes to mind here;), but I was wondering if there
> is a better solution? ..in other words, is it possible to get such
> events from the system in a similar way like one would receive regular
> MIDI events?
Subscribe to SND_SEQ_CLIENT_SYSTEM:SND_SEQ_PORT_SYSTEM_ANNOUNCE.
Try "aseqdump -p 0:1" to see what events you get.
HTH
Clemens
next prev parent reply other threads:[~2008-04-01 7:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-01 1:48 Detecting new alsa sequencer clients (with some event loop) so that i can subscribe them R. Dresens
2008-04-01 7:01 ` Clemens Ladisch [this message]
2008-04-01 21:24 ` R. Dresens
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