From: Clemens Ladisch <clemens@ladisch.de>
To: Randell Jesup <randell1@jesup.org>
Cc: alsa-devel@alsa-project.org
Subject: Re: Use of _hint() functions and older machines
Date: Sun, 23 Oct 2011 12:36:51 +0200 [thread overview]
Message-ID: <4EA3EE43.3010904@ladisch.de> (raw)
In-Reply-To: <4EA0E6E5.1050600@jesup.org>
On 10/21/2011 05:28 AM, Randell Jesup wrote:
> On older machines, _hint() aren't available, so even if I make them
> optional to dlsym-loading, I would need some other method to get the
> information I assume using older, now-deprecated-or-gone interfaces.
On older machines, that information wasn't available at all.
The recommendation was to use "default" or to let the user enter
a device name.
The best way to get a list of devices would have been to enumerate sound
cards with snd_card_next(), then use device names "default:CARD=x".
However, this gets only the primary device of each card, there might be
sound cards without a PCM device, devices not based on an ALSA kernel
driver aren't listed, and the "default:CARD=x" mechanism doesn't work if
the user has redefined the "default" device.
Regards,
Clemens
next prev parent reply other threads:[~2011-10-23 10:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 3:28 Use of _hint() functions and older machines Randell Jesup
2011-10-22 18:04 ` Colin Guthrie
2011-10-23 7:46 ` Randell Jesup
2011-10-23 10:36 ` Clemens Ladisch [this message]
2011-10-24 5:19 ` Randell Jesup
2011-10-24 7:00 ` Raymond Yau
2011-10-24 10:26 ` Clemens Ladisch
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