Re: snd_pcm_hw_params_current() ?

[Florian Bomers <Florian.Bomers@sun.com>]

Jaroslav Kysela wrote:
> 
> On Thu, 3 Oct 2002, Florian Bomers wrote:
> 
> > Hi,
> >
> > there is snd_pcm_sw_params_current() but not snd_pcm_hw_params_current(). How
> > can I get the current hardware configuration for a given snd_pcm_t handle ? Am I
> > missing something ?
> 
> Hardware parameters must be configured from application all time.

So that means that I need to cache hw params if I ever want to use them again ?
E.g. my app does this:

open(), set hw params, set sw params
free hw params and sw params to save memory

work with the device: start/write/stop/etc.

When I now want to know the buffer size, I would like to obtain the current hw
params which I had set above to the pcm handle.

I understand that I initially need to set hw params to a pcm handle before I
could get current hw params, but once I did that, especially in prepared/running
state, the device has well-defined hw params and why shouldn't people be allowed
to query them ?

Thanks !
Florian

> 
>                                                 Jaroslav
> 
> -----
> Jaroslav Kysela <perex@suse.cz>
> Linux Kernel Sound Maintainer
> ALSA Project  http://www.alsa-project.org
> SuSE Linux    http://www.suse.com
> 
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-- 
Florian Bomers
Java Sound
Java Software/Sun Microsystems, Inc.
http://java.sun.com/products/java-media/sound/


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