Re: [RFC] Extra info via the TLV interface

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On Tue, 5 Sep 2006, Takashi Iwai wrote:

> At Tue, 5 Sep 2006 08:30:42 +0200 (CEST),
> Jaroslav Kysela wrote:
> > 
> > On Mon, 4 Sep 2006, Takashi Iwai wrote:
> > 
> > > Sorry, I meant to re-define every control "name" that is not
> > > conforming in the above.  Renaming a mixer element _always_ results in
> > > a name mismatch _error_ in alsactl.  It's handled as an error, not a
> > > warning.
> > 
> > Note that alsactl or probably alsa-lib should be improved. We cannot 
> > expect that names won't change and name cleanups are preferred. I would 
> > propose to create a database with name change description to prevent these 
> > errors and allow users switching between two ALSA driver versions more 
> > nicely.
> > 
> > The question is, if applications use these names to do something special
> > (if they compares them with own strings). Of course, we will break the 
> > compatibility in this case. I would like to discuss, if adding a function
> > like
> > 
> > int snd_mixer_compat_control_name(const char *name,
> > 				  const char *alsa_version,
> > 			          char *new_name, int new_name_size)
> > 
> > would be sufficient to ALSA API.
> 
> Hmm...  How would this function be used?
> I still don't get it.  Is it a function to be called by apps, or a
> function used in alsa-lib internaly?

An application should decide (thus this API would be exported).. I would 
like to know if we have also other apps depending on the control name 
strings these days or if it's only the alsactl problem (which makes the 
situation easier).

						Jaroslav

-----
Jaroslav Kysela <perex@xxxxxxx>
Linux Kernel Sound Maintainer
ALSA Project, SUSE Labs

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