10 Dec
2002
10 Dec
'02
6:34 p.m.
On Tuesday 10 December 2002 23.02, Paul Davis wrote:
Like what? Since we're talking about sample accurate timing, isn't
asking the host about the musical time for an event timestamp
sufficient for when you want that information?
Note that I'm talking about a low level communication protocol for
use in situations where you would otherwise use LADSPA style control
ports, or audio rate control streams. These are *not* events as
stored inside a sequencer.
Yes, that's exactly what I have in mind. I can't think of any other
sensible way of doing it.
Well, I didn't mean "musical time" as in "musical time and nothing
else". *heh*
The use of a callback, as opposed to passing something to plugins
whether they want it or not (which means you would have to calculate
the musical time, transport time, SMPTE time and whatnot for every
single sample), was the whole point.
//David Olofson - Programmer, Composer, Open Source Advocate
.- The Return of Audiality! --------------------------------.
| Free/Open Source Audio Engine for use in Games or Studio. |
| RT and off-line synth. Scripting. Sample accurate timing. |
`---------------------------> http://olofson.net/audiality -'
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Yes.
Event/audio time is one thing, and musical time is something
completely different, although related.
you've just defined "event time" to be the same as "audio time".
thats a mistake, i think. there are some definite benefits to being
able to define events' time in musical time as well. Musical time
can be a bit hairy to calculate, so I don't think
it's a good idea to do it all the time, and pass it to all
plugins.
VST does this the right way. or rather, existing steinberg hosts
do. they don't compute the information till a plugin asks for it.
then they cache it for that "block", handing the same data to any
other plugin. What you want
is a callback that gives you the musical time
corresponding to a timestamp, and probably a few other variants as
well.
this isn't adequate. the VST time info struct contains pretty much
no dead wood at all, IMHO.