linuxaudio.org

I was looking at the (unfinished) example sampler plugin here:
https://gitorious.org/gabrbedd/lv2-sampler-example
I ran through the mental exercise of trying to figure out how to

finish it, and I have a question about the UI extension.  How does a

UI tell its plugin to load a sample file?  The example has a TODO in

its run function that indicates it will react to an LV2_Event that

contains a pathname for a file.  I don't understand how a UI will

create this event.
On lv2plug.in, I see there's an experimental string-port extension

that defines a transfer mechanism for strings.  Is this the

recommended method?  Do any hosts support this extension?
There's also an atom extension, but I don't think I grok it yet.  Can

I create a port of type atom:MessagePort?  How does a UI make use of

that?

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