I suggest $HOME/.ladspa/presets/[plugin-name]/* for user-defined presets. and all other default presets in $PREFIX/share/ladspa/presets/[plugin-name]/* are installed read-only, but can be overridden by user-defined presets.
I think classifying the ladspa plugin types in the $PREFIX/lib/ladspa is unnecessary, because a library binary can contain mixed types of plugins. ---- as a completely different issue, is there a way to indicate if a non-audio port is an array (instead of a single value), and is there a clean way to define the size of this control data array that is not the same size as SampleCount? Also, what happens if the audio input port and audio output port are different sizes, say in the case of a time-stretching plugin? liulk
