[linux-audio-dev] LADSPA presets was: [ANN] new LADSPA plugins

[Tom Szilagyi]

On Sun, 25 Jan 2004, Mike Rawes wrote:

> > So once more (I know this has been talked over before on this list):
> > Wouldn't it be very cool if all LADSPA hosts spoke the same language
> > with respect to effects presets?
>
> There already is, in the form of liblrdf (http://plugin.org.uk/lrdf).
> This provides a way of:
>
> * Arranging plugins into a hierarchy (Simulators/Reverbs, Time/Delays,
> Frequency/Filters/Low Pass and so on)
> * Defaults and Presets
> * Labelling of port values (as in the TAP Reverb Presets port)
>
> Host support of the hierarchy is fairly extensive, but the other featues
> aren't AFAIK.
>
> An example of how that Preset port could be expressed:
>
>   <ladspa:ReverbPlugin rdf:about="&ladspa;2412">
>     <dc:title>TAP Reverberator</dc:title>
>     <ladspa:hasPort>
>       ...
>     </ladspa:hasPort>
>     <ladspa:hasPort>
>       <ladspa:InputControlPort rdf:about="&ladspa;2142.7"
> ladspa:hasLabel="Presets">
>         <ladspa:hasScale>
>           <ladspa:Scale>
>             <ladspa:hasPoint>
>               <ladspa:Point rdf:value="0" ladspa:hasLabel="AfterBurn
> (Short)" />
>             </ladspa:hasPoint>
>             <ladspa:hasPoint>
>               <ladspa:Point rdf:value="1" ladspa:hasLabel="AfterBurn
> (Long)" />
>             </ladspa:hasPoint>
>             <ladspa:hasPoint>
>               <ladspa:Point rdf:value="2" ladspa:hasLabel="Drum Chamber"
> />
>             </ladspa:hasPoint>
>             <ladspa:hasPoint>
>               <ladspa:Point rdf:value="3" ladspa:hasLabel="Garage" />
>             </ladspa:hasPoint>
>           ...
>           </ladspa:Scale>
>         </ladspa:hasScale>
>       </ladspa:InputControlPort>
>     </ladspa:hasPort>
>   </ladspa:SimulatorPlugin>
>
> A host could read in each of the Point values, and present them in a
> drop-down list for example.
>

Thank you, this is just what i was searching for :))
Is this a way that is portable between hosts?
If it is, i guess i have to have a closer look at lrdf...


Tom