[GEM-dev] setting multiple parameters at once

[Mathieu Bouchard]

On Thu, 2 Dec 2010, IOhannes m zmölnig wrote:

> the only thing i think you could possibly mean, is that it would be 
> better to have [pix_v4l2] and the like, but i think it is one of the 
> strengths of Gem that it allows a patch regardless of the OS.

You can achieve that with abstractions. Make [pix_video] an abstraction 
that picks [pix_v4l1], [pix_v4l2], [pix_ds], etc.

> these people will now be relieved to learn that they can now finally
> control (most) parametesr.

congrats ! (that was one of the big reasons why I avoid using [pix_video] 
when I can)

> another problem is, several devices using the same v4l2 backend expose 
> different parameters. there are some standard ones (e.g. "saturation") 
> but there are also custom parameters.

that's not a problem.

> the "@" syntax is borrowed from max/msp where they have been around for 
> ages (for object arguments, don't know about messages though) it is 
> basically the same as miller's cmdline-arg-like interface as seen in 
> e.g. [soundfiler]. i have to admit, that i don't like this interface at 
> all - everytime i use it i shudder.

The @-syntax is also used in Flext.

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| Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC