[PD] Dynamic selection of dac~ channel

[patrice colet]

Le 10/11/2014 19:44, Alessio Degani a écrit :
>
> Thank you Patrice! The attached patch do exactly what I want! It's a 
> little bit tricky to understand what exactly the patch does but it 
> simply works.
>
> Are there some drawbacks when using this approach to dynamic dac~ 
> channel allocation? (i.e. unhandled exceptions, memory allocation, 
> overhead, ...)
>
> Bests
>

This method works pretty good nowadays indeed, sorry to not put 
explanation comments, but I can give some clues...

We create [dac~ n] (n is channel number) in a subpatch protected with $0 
variable in subpatch name.

Instance specific dynamic patching is explained here but this is a bit old:

http://puredata.info/docs/tutorials/TipsAndTricks#instance-specific-dynamic-patching

Now we can put $0 at the middle of a name, then [makefilename] method 
becomes obsolete.

I don't think we would go on mem alloc issues by doing simple things 
like this, it might happen on huge dynamic creation but I never 
encountered this,
maybe someone that knows better pd core would give more accurate answers.

Also, I've made it fast and figured out that [t b b]-[$1] is useless, 
you can directly connect [loadbang] to [pack $0 $1].

Look at internal messages to know more about dynamic patching:

http://puredata.info/community/pdwiki/PdInternalMessages