[gmpi] Re: 3.14 UIs
- From: "Jeff McClintock" <jeffmcc@xxxxxxxxxx>
- To: <gmpi@xxxxxxxxxxxxx>
- Date: Sat, 5 Jun 2004 23:50:56 +1200
Hi Steve,
"Shared Object" = GUI (i.e. from shared library or dll)
Either the host loads your GUI in-process, or the mini-host loads it
out-of-process.
The main advantage being that the same GUI binary can be used in-process,
out-of-process or via network. The added efficiency in-process is just a
bonus.
Jeff
----- Original Message -----
From: "Steve Harris" <S.W.Harris@xxxxxxxxxxxxxxx>
To: <gmpi@xxxxxxxxxxxxx>
Sent: Saturday, June 05, 2004 8:36 PM
Subject: [gmpi] Re: 3.14 UIs
> On Sat, Jun 05, 2004 at 02:29:07 +1200, Jeff McClintock wrote:
> > >... nothing will even be as efficient as using a defined function
> > > call interface for the DSP/GUI communication. so there is going to be
> > > a tradeoff here.
> >
> > I agree with your analysis, but there may be a 3rd option....with no
> > tradeoff.
> >
> > a) host-initiated in-process GUI
> >
> > - host loads shared object
> > - GUI/host communication via a defined function call interface
> > (setParameter() etc)
> >
> > No performance penalty. No complex code. Easy as VST.
>
> I think your probably overestimating the overhead of UDP IPC, given that
> the UI is most likly going to draw something on the screen as a consequnce
> the overhead from the IPC is unmeasurable in comparison.
>
> > b) out of process or remote GUI
> >
> > - mini-host loads shared object
> > - mini host connects to well-known socket on host(+machine)
> > - mini host forwards setParameter() calls to 'real' host via network or
IPC
>
> I guess "mini-host loads shared object" is a typo? At least for OSC you
> cant use a well known port, because only one host can be using that port.
> In DSSI the UI is started with the URL of the host as its first argument.
>
> > -inter-process communication method is interchangeable. You could use
TCP
> > on Linux and sockets on Win32 ( hypothetical examples). You could use
OSC.
>
> OSC can use names sockets, UDP, TCP as its transport. I think named
> sockets were earliest, but people tend to only use UDP now.
>
> - Steve
>
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