Re: [LAD] [Jack-Devel] JACK & MIDI

Am Freitag, 18. Januar 2008 schrieb Paul Davis:
> On Fri, 2008-01-18 at 09:37 -0800, Fernando Lopez-Lezcano wrote:
> > Is there anything inherently wrong with OSC as a _transport_ protocol?
> > Anything that makes it unsuitable for that purpose within the framework
> > of jack? (I know there have been threads about this before)
> OSC is not a bus-oriented protocol, its 100% point-to-point. That is,
> you do not put messages on a bus and all listeners pick it up. You have
> to explicitly dispatch each OSC message to each target. this makes it
> fundamentally different from MIDI, which, independent of the actual
> physical transport layer, is bus oriented.

Nope! (I have read the specs...)

The implementations make OSC a point-to-point protocol, because most
implementations use UDP (and maybe some use TCP) for the transport. But the
transport is actually _not_ part of the spec. The osc-spec only defines the
messages passed around. And they are typically "I send them without knowing
who receives them and what it does to them".

I think it would be pretty easy and very good if jack got extended to JACK-OSC
by providing ports to send and receive osc-messages similar to audio and
midi. I don't know about the internal of the jack-code, but probably the
message-passing of midi could be factored out to be used with any kind of
messages...

++osc_in_jack

Arnold

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