On Tuesday 11 February 2003 19.33, Marc Poirier wrote: > > > It seems desirable for all hosts, regardless of platform, to > > > store plug=3D in settings in the same format. Mayne that is not > > > necceasry. > > > > Ok, but that's a host thing. It has nothing at all to do with > > plugins (right?). > > Maybe I'm missing something here, but so far as I see it, plugins > obviously need to be concerned with the settings format. They have > to receive and process settings Yes. > and they have to produce them. No - unless they can "learn" from audio and control input, but I think=20 that's a separate issue. (A plugin doubling as it's own UI,=20 basically.) Normally, presets would be generated by the *GUI* part of a plugin,=20 and then (considering that plugins may come without custom GUIs) it=20 has to be sent to the plugin in a way that =09* avoids sending a full preset for every change =09* allows gatewaying through whatever connection is =09 used between DSP and GUI parts =09* allows hosts to query, intercept or otherwise get =09 hold of the data for storing it to file > So far, a few possible schemes have been suggested. The data can > be completely under the control of the host and simply a snapshot > of parameter values. I prefer this way. > In that case, the plugin need not know > anything about the settings format, however, no one's going to > agree to that since it's clearly not sufficient for a lot of > plugins' needs. Like what? (Though this is a deep subject... We've probably written a=20 few hundred kB on the topic over at LAD.) > Another possibility is totoally opaque data > blocks, which the plugin needs to know about; in fact, the plugin > is the only one who understands it. What about the GUI? What about plugins without custom GUIs...? There=20 *has* to be a finer grained interface to the data, no matter what.=20 Why not base it on the control interface? > And another possibility is > some sort of data format, which could be defined as a data > structure, a data block with tags, or a keyed XML structure. So > anyway, if the plugin is provided with a keyed XML data block, it > certainly will need to know that it's a keyed XML data block, > otherwise what will it do? Well, yes - but then you have two options for GUIs: =091) Have them parse and generate XML as well. =092) Use a separate (private or public) interface =09 for GUI/DSP communication. If 2) + public, it's no longer obvious why *plugins* should read and=20 generate preset files, since hosts could easilly intercept the data=20 on the way from the GUI to the DSP plugin. //David Olofson - Programmer, Composer, Open Source Advocate =2E- The Return of Audiality! --------------------------------. | Free/Open Source Audio Engine for use in Games or Studio. | | RT and off-line synth. Scripting. Sample accurate timing. | `---------------------------> http://olofson.net/audiality -' --- http://olofson.net --- http://www.reologica.se --- ---------------------------------------------------------------------- Generalized Music Plugin Interface (GMPI) public discussion list Participation in this list is contingent upon your abiding by the following rules: Please stay on topic. You are responsible for your own words. Please respect your fellow subscribers. Please do not redistribute anyone else's words without their permission. Archive: //www.freelists.org/archives/gmpi Email gmpi-request@xxxxxxxxxxxxx w/ subject "unsubscribe" to unsubscribe