Re: how to define a 2-index control element?

[Abramo Bagnara <abramo@alsa-project.org>]

Paul Davis wrote:
> 
> >> If someone has hardware with 1400+ controls, than memory allocation issue
> >> is out of question. I wrote that we can optimize current code - add some
> >> hash tables for faster lookups for example.
> >
> >well, about 200kB is not so big nowadays :)
> >
> >i thought the hardware doesn't need allocate 1400 controls - the
> >controls are identical but have different indices.
> >in such a case, the indexed-access would be most straightforward.
> >no hash, no list.
> 
> precisely. in fact, there are:
> 
>            1456 mixer controls
>            52   RMS meters
>            80   peak meters
> 
> for the mixer controls, they form a matrix that is accessed by
> index. for the meters, they form unidimensional arrays that are also
> accessed by index.
> 
> i think any talk of allocating 1 control per "semantic control" is
> crazy. its clear that these controls should be accessed as a matrix
> type. they were designed by the h/w people as a matrix, and its been
> ALSA's policy to have the kernel API mirror h/w designs and
> capabilities.

Sorry to say that, but I think this is a nonsense.

Many cards have element organized in register with an index (you might
say an "array"), but this is definitely not a reason to implement it in
a different way.

We have well designed control keys (id) and I don't see any reason to
change something that's perfectly suitable (without any compromise) for
the job.

We have the sane association one control / one value and just because
this card has many controls, you seems to wish to go toward a different
(IMO insane and confusing) solution.

Consider that independently from how you represent the data this card
will ever have many controls (i.e. many values to show/change).

I definitely don't see your point, sorry.

-- 
Abramo Bagnara                       mailto:abramo@alsa-project.org

Opera Unica                          Phone: +39.546.656023
Via Emilia Interna, 140
48014 Castel Bolognese (RA) - Italy

ALSA project               http://www.alsa-project.org
It sounds good!

_______________________________________________________________

Have big pipes? SourceForge.net is looking for download mirrors. We supply
the hardware. You get the recognition. Email Us: bandwidth@sourceforge.net