[gmpi] Re: Item 0: Agenda
- From: Matthew Xavier Mora <mxmora@xxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Thu, 13 Feb 2003 11:04:55 -0800
At 10:35 AM -0500 2/12/03, RonKuper@xxxxxxxxxxxx wrote:
b.2 Future work: recommend protocol for networked
communication (several good ones emerging, the
design + implementation of which are orthogonal
to our issues, i believe)
I would hope we can keep this in our minds at the start as I think it
can have huge repercussions on the standard. I am planning on
submitting a "Remote DSP over FireWire" proposal to the 1394ta group
some time soon. The first pass maybe limited to AVC (61883-*) streams
but I see no reason why non AVC plugins couldn't be remote either (ie
Photoshop plugins).
Anyway, I think you should think about these things when designing
this standard:
1) The DSP code may not be running on the same thread, CPU, hardware,
or even operating system.
2) Endian issues. Some architectures favor little endian and other
favor big endian. Pick one or deal with both.
3) Use MIDI whenever possible. MIDI data can already be incorporated
with audio streams over FireWire which means we won't have to invent
another protocol to send parameter changes. Plus existing hardware
will be able to manipulate your GUI. Also don't think MIDI speed is a
limiting factor. "MIDI over alternate transports" already takes into
account send MIDI data at higher than 1.0 speeds.
4) GUI separate from processing. If your GUI-to-processing interface
uses MIDI internally then it is no problem sending the commands over
a transport to control your processing.
5) Downloading the processing code to a remote DSP server/Hardware
box for execution.
6) Synchronization. Absolute-sample counter or SMPTE?
Matt
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