[gmpi] Re: 3.11 Parameters

On Wed, Mar 31, 2004 at 12:14:54PM -0500, Ron Kuper wrote:
> Oh, you are thinking *really* dynamic changes, like anywhere at anytime,
> even during playback.  I had something more restrictive in mind, both
> for param changes and dynamic output creation.
> 
> The idea is that the plugin has to ask the host if it's OK to change
> param counts or pin counts.  For example, the plugin says:
> 
>       bool bOK = pHost->BeginParamCountChange();
>       if (bOK)
>       {
>               ... change param counts ...
>               pHost->EndParamCountChange();
>       }
>       else
>               ... try again later ...

And I was thinking the opposite model.  The host says:

        module_id = plugin->module_new("STEREO_STRIP", "Input 14 (S)");
        if (module_id < 0)
                /* plugin failed or chose not to create that module */

Or more heavy handedly:

        GMPI_module_desc modules[]; /* holding all current modules */
        int nmodules;
        ...
        if (add_module_to_array(modules, nmodules, plugin->modules[5])) {
                nmodules++;
                /* create a new plugin instance, if OK, destroy the old one */
                new_plug = recreate(plugin, modules, nmodules);
                if (!new_plug)
                        /* plugin rejected new module config */
        }


I can see why the host would ask the plugin to change its config, but why
would a plugin do it spontaneously?

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