[PD-dev] Default value for unconnected signal input, or connection detection in an external

Christof Ressi info at christofressi.com
Thu Mar 19 19:38:57 CET 2020


This is pretty adventurous :-)

On 19.03.2020 19:17, Antoine Rousseau wrote:
>
> also you can have a look to moonlib/dinlet~, which (I think) does what 
> you want.
> source is there: 
> https://github.com/MetaluNet/moonlib/blob/externals/moonlib/dinlet%7E.c
>
>
>
>
>
> Le jeu. 19 mars 2020 à 16:41, x nor <x37v.alex at gmail.com 
> <mailto:x37v.alex at gmail.com>> a écrit :
>
>     Ahh okay, these are not main signal inputs (the first inlet is
>     used for something already).. and I want to just use `m_pd.h` so I
>     guess I'll add the creation arguments.
>     Good to know about CLASS_MAINSIGNALIN float setting for the first
>     inlet though!
>     Thanks!
>     -Alex
>
>     On Thu, Mar 19, 2020 at 8:28 AM Christof Ressi
>     <info at christofressi.com <mailto:info at christofressi.com>> wrote:
>
>         Hi,
>
>         for the first inlet you can simply set the float field passed
>         to CLASS_MAINSIGNALIN. This is actually done by many Pd
>         objects, e.g. "phasor~", "osc~", etc.
>
>         For other inlets it's a bit more tricky. If you're ok with
>         including "m_imp.h", you can use "obj_findsignalscalar" which
>         returns a pointer to the scalar value for the Nth signal inlet.
>
>         Christof
>
>         On 19.03.2020 16:16, x nor wrote:
>>         Hey Christof and dev list,
>>
>>         Christof,
>>         I think it was you that did the work that allowed for a
>>         default value for unconnected [inlet~] in the inlet_features
>>         branch that didn't get merged?
>>
>>         I'm wondering, is there a way to do that with externals as is
>>         without modifying the pure data source? Either that or a way
>>         to detect connectivity?
>>
>>         I want to provide some audio rate controls to an external I'm
>>         writing but not *require* them for operation. 0 isn't a good
>>         default for some of these (amp or frequency multiplication).
>>         If its not possible to provide defaults or detect
>>         connectivity (so i can provide my own defaults) I'll probably
>>         just provide optional creation args to opt in to these audio
>>         rate parameters.. but that just ends up being a lot more work
>>         so I figured I'd ask first :)
>>
>>         Thanks,
>>         Alex
>
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