[gmpi] Re: gmpi Digest V1 #65 topic: Inter-parameter linkages
- From: "Jeff McClintock" <jeffmcc@xxxxxxxxxx>
- To: <gmpi@xxxxxxxxxxxxx>
- Date: Fri, 16 Apr 2004 09:50:21 +1200
> I'm starting to like the actor idea FWIW, my only real concern is that its
> a new metaphor and hasnt been tried in any real systems.
I kind of think of the actor not as a new thing, more like a seperation of
the two functions of a Custom GUI.
1)pretty graphics
2)parameter validation and interdependancy logic.
i.e. The actor is almost a sub-set of what is normally done inside a custom
GUI. Whe're just extending that same functionality to non-GUI hosts, and to
host-generated UIs. So the entire 'user-experience' is more consistant
regardless of the UI.
A second way of looking at it. In VST you call setParameter() which:
1) validates the new value
2) updates any linked parameters
3) stores the new value in parameter memory
4) notifies the DSP
In GMPI, we've moved step 3 into the host, so to provide the same features
as VST, the plugin needs a new API call to support step 1 and 2. That new
API is the Actor, again just a re-organisation of the old concept.
Best Regards,
Jeff
----- Original Message -----
From: "Steve Harris" <S.W.Harris@xxxxxxxxxxxxxxx>
To: <gmpi@xxxxxxxxxxxxx>
Sent: Thursday, April 15, 2004 7:04 PM
Subject: [gmpi] Re: gmpi Digest V1 #65 topic: Inter-parameter linkages
> On Wed, Apr 14, 2004 at 09:47:12 -0600, Mike Berry wrote:
> > But if we require the host to play back automation through the
> > actor, then the host has to deal with the automated values potentially
> > changing at a time when that is illegal.
> > Can you give some example of how the automation could have become
> > illegal without the host knowing (other than the plugin binary
changing)?
>
> Not all parameters will be automated and the values may have been
> invalidated by changing another parameter.
>
> I'm starting to like the actor idea FWIW, my only real concern is that its
> a new metaphor and hasnt been tried in any real systems. Its seems pretty
> straightforward though, and 95% of plugins will use NULL I guess.
>
> - Steve
>
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