[LAD] Portable user interfaces for LV2 plugins

Paul Davis paul at linuxaudiosystems.com
Wed Mar 2 22:58:34 UTC 2011

On Wed, Mar 2, 2011 at 5:36 PM, Stefano D'Angelo <zanga.mail at gmail.com> wrote:
> Since I'm not just complaining or posing hypotetical questions, but
> want the understand the issue at its deepest, I want to ask you to
> please better point out what is exactly this host-mediate parameter
> accessor API (a link to docs is more than enough).

the AU model is subtly different in that it uses a
listener/notification model. a view can directly set a parameter, but
doing so will notify zero or more "listeners" of the change. these
listeners include the host, which wants to do automation (often) since
this is not a feature of the plugin(s).

and i'll be fair, the AU model includes "custom properties":

   "Host applications can query an audio unit about its parameters and
about its standard properties, but not
about its custom properties. Custom properties are for communication
between an audio unit and a custom
view designed in concert with the audio unit."


on re-reading this, i'm not sure i want to hold this up as a the best
model for LV2, but at some deeper level it is because buried somewhere
in all that kRuftilyNamedVerbosity is an API that permits
process-level separation of the GUI (view) and plugin.


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