From: Clemens Ladisch <clemens@ladisch.de>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: Some questions about userspace control elements
Date: Sat, 07 Feb 2015 16:45:30 +0100 [thread overview]
Message-ID: <54D6331A.5070200@ladisch.de> (raw)
In-Reply-To: <54D5713B.2000406@sakamocchi.jp>
Takashi Sakamoto wrote:
> On Feb 6 2015 18:38, Clemens Ladisch wrote:
>> The owner field is used because there is no other field to set the
>> count.
>
> No. In SNDRV_CTL_IOCTL_ELEM_ADD ioctl, struct snd_ctl_elem_info.count
> has the number of elements in this control, there it's an abuse of
> member unrelated to the count.
That is a different count.
struct snd_ctl_elem_info.count allows a control to have multiple values.
For example, a stereo volume control has two values.
kctl.count creates multiple controls.
Regards,
Clemens
next prev parent reply other threads:[~2015-02-07 15:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-01 11:41 Some questions about userspace control elements Takashi Sakamoto
2015-02-01 17:50 ` Clemens Ladisch
2015-02-02 14:14 ` Takashi Sakamoto
2015-02-04 23:51 ` Takashi Sakamoto
2015-02-05 0:44 ` Takashi Sakamoto
2015-02-06 9:38 ` Clemens Ladisch
2015-02-07 1:58 ` Takashi Sakamoto
2015-02-07 15:45 ` Clemens Ladisch [this message]
2015-02-08 10:57 ` Takashi Sakamoto
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