Could you memorize the parameter values from the preset, and on a timer regularly check the parameter values?
On Sat, Dec 1, 2018, 2:43 PM Paul Davis <[email protected] wrote: > > > On Sat, Dec 1, 2018 at 5:24 PM Paul Davis <[email protected]> > wrote: > >> here at ardour HQ we're trying to figure how we're supposed to do >> something that we want to do: indicate to the user when the parameters of a >> plugin, previously set by a preset, have been subsequently modified by the >> user. >> >> the problem comes from the fact that when PresentPreset is set on a >> plugin, it notifies property listeners about the change in the >> PresentProperty value. Great! >> >> but then according to apple docs and other code, we are supposed to call >> AUParameterListenerNotify() with AnyParameter as the parameter ID, so that >> all listeners get notified about the (potentially) new values of all the >> parameters. Ardour is itself a listener. >> >> The notifications occur in this order, so there is no way sensible to >> know when the notifications that we've triggered by using AnyParameter have >> finished. >> >> This means that managing a flag that indicates "all parameters have a >> value that comes from a preset" seems hard, because we don't know whether a >> ParameterValueChanged notification comes from: >> >> (1) a preset change itself (specifically, us notifying all listeners >> about it) >> (2) the plugin GUI being used to change a parameter on its own >> (3) some other GUI (eg. host provided) being used to change a >> parameter on its own >> >> Can anyone recommend a "best practice" here, if there is one? >> > > ps. one idea we've had is to queue some other notification that will be > delivered *after* all the parameter value change notifications are done, > but we have no idea what that might be. > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Coreaudio-api mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > https://lists.apple.com/mailman/options/coreaudio-api/howard%40antarestech.com > > This email sent to [email protected] >
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