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: Mon, 24 Oct 2011 12:26:58 +0200 [thread overview]
Message-ID: <4EA53D72.3060009@ladisch.de> (raw)
In-Reply-To: <4EA4F573.9060704@jesup.org>
Randell Jesup wrote:
> On 10/23/2011 6:36 AM, Clemens Ladisch wrote:
> > 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.
>
> Ugh. So, there's no reasonable way to get a user-understandable list
> before .14? How useful was snd_ctl_card_info_get_name()?
That gives you the card name, which is not the same as the name of the
PCM device (although it shouldn't matter when the card has only one
PCM device).
> And I guess I'd need to enumerate the 'devices' and 'subdevices' on
> each card as well...
Yes, but subdevices are typically used for multiple streams that are
mixed together, so you can ignore them.
Regards,
Clemens
prev parent reply other threads:[~2011-10-24 10:25 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
2011-10-24 5:19 ` Randell Jesup
2011-10-24 7:00 ` Raymond Yau
2011-10-24 10:26 ` Clemens Ladisch [this message]
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