[LAD] "enhanced event port" LV2 extension proposal

[Dave Robillard]

On Wed, 2007-12-05 at 04:35 +0100, Lars Luthman wrote:
> On Tue, 2007-12-04 at 09:42 +0000, Krzysztof Foltman wrote:
> > What about this (translate it to C in your heads :) ):
> > 
> > interface IURIRegistryObserver
> > {
> >   // function in plugin etc. called by host whenever new URI is registered
> >   void mapping_added(int id, const char *uri);
> > };
> > 
> > interface IURIRegistry
> > {
> >   int uri_to_id(const char *uri, bool create_if_absent);
> >   const char *id_to_uri(int id);
> >   void add_observer(IURIRegistryObserver *observer);
> >   void remove_observer(IURIRegistryObserver *observer);
> > };
> > 
> > interface IURIRegistries
> > {
> >   IURIRegistry *get_registry(const char *registry_uri);
> > };
> 
> I don't like having something this complicated in an extension that is
> going to be required if you just want to write a simple synth with a
> MIDI input. Is there really any need for adding and removing mappings
> dynamically?

Definitely agreed.

> Just passing an array in the LV2_Feature data would be enough for me.

Simple is nice, but somewhat closed ended.

How about simply passing a function pointer which converts a string to
an int? (in a Feature struct so things can be added for a more advanced
symbol system in the future)

Easier on the plugin author to just call a function than have to
implement that search all over the place anyway.

-DR-