From: Vinod Koul <vinod.koul@intel.com>
To: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>,
alsa-devel@alsa-project.org, lakshmi.n.vinnakota@intel.com
Subject: Re: PCM extra attributes
Date: Thu, 25 Jul 2013 14:08:10 +0530 [thread overview]
Message-ID: <20130725083810.GK18642@intel.com> (raw)
In-Reply-To: <51F0DC9C.5090008@perex.cz>
On Thu, Jul 25, 2013 at 10:06:52AM +0200, Jaroslav Kysela wrote:
> Date 24.7.2013 19:09, Vinod Koul wrote:
> > Hey Takashi,
> >
> > We were looking to find the substream index in the userspace for the device
> > opened (in case we support multiple substreams and mix them). Since we also
> > wanted to have some specific alsa controls for each substream the problem of not
> > knowing substream in usermode make stuff interesting!
>
> The substream/subdevice index is in the snd_pcm_info field, so you can
> correlate the PCM with the controls from the control API.
>
> snd_pcm_info_get_subdevice()
This looks intresting, Thanks Jarsolav and Raymond.
If I get snd_pcm_info after the stream has been created I should see the
subdevice and thus use alsa controls corrorsponding.
Let me test this, it should work
~Vinod
prev parent reply other threads:[~2013-07-25 9:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 17:09 PCM extra attributes Vinod Koul
2013-07-25 3:54 ` Raymond Yau
2013-07-25 8:06 ` Jaroslav Kysela
2013-07-25 8:38 ` Vinod Koul [this message]
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