[LAD] How to develop guis for LV2?

Steve Harris steve at plugin.org.uk
Fri Nov 6 12:57:03 UTC 2009

On 5 Nov 2009, at 23:33, David Robillard wrote:

> On Thu, 2009-11-05 at 22:21 +0100, fons at kokkinizita.net wrote:
>> On the LV2 website, Lars Luthman's UI extension is described as:
>> "This extension is written for revision 2 of the LV2 specification
>> and is NOT compatible with revisions 3 and later. Do not implement
>> this extension in new plugins or hosts, and do not expect it to work
>> in old ones. It is only available here for archaeological purposes."
> For anyone genuinely interested and not just taking vain pot shots to
> further some weird personal vendetta or whatever the hell:
> The thing that changed in r3 is: persistent references to ports must
> refer to ports by their symbol, and not their index.  Persistent means
> things on disk that might refer to several versions of a plugin in the
> future, nothing about the index has actually changed.  Plugin data
> files, host session files, etc.

This was a hangover from LADSPA, which had confusing and contradictory  
claims about what should/shouldn't be used to identify ports.

I still don't think there's consensus there.

- Steve

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