I agree. I think for any indeterminate operation, like anything in a
separate thread, there should be a bang when that operation is
complete. That way you can guarantee that things are ready when you
run a process. If you want to make sure that things will be there on
time, then these threaded/indeterminate operations should run well in
advance. Using guesswork and delays is not a real solution...
.hc
On Oct 30, 2008, at 4:25 AM, cyrille henry wrote:
helo,
i'm also having this kind of problem. specially when loading a picture in pix_image. i think the best would be the have a bang when things are ready...
C
B. Bogart a écrit :
Hey all,
I'm having more and more problems with sync in PD. By sync I mean
that parts of my patches have processing delays that mess up timing. In general I've been using buffers and delays to keep things working.This approach is not very scalable.
I find myself using the "timer" object all the time to see if
there is a processing delay I have to worry about. That is in cases where
there is a bang saying an operation is done.Two examples I'm working on now (in Gem):
First there is a delay between sending a message and the
pix_buffer to store, and then again for pix_buffer_read to read the pixels. The
delay is long enough that trigger does not work, there needs to be a
delay to make sure the image in the buffer is the right one. (sometimes as
much as 200ms)A second example is that I'm using pix_share and and second PD
instance to offload some CPU usage. Making sure the image sent to that PD instance and the image received later in the chain is difficult.I'm not writing for specific advice, hence the generalities, but
wanted to start a discussion on the issue.What is the long-term solution for PD to solve these issues?
Should all objects that introduce a delay send a bang when they are complete?
(for example pix_buffer? Of course an additional delay occurs when when
the pix_buffer is written to memory and when it gets to the gfx card for display.I'm banging my head over these issues a lot lately and wonder if
there is a better approach.Back to attempting kludging a solution. .b.
GEM-dev mailing list GEM-dev@iem.at http://lists.puredata.info/listinfo/gem-dev
GEM-dev mailing list GEM-dev@iem.at http://lists.puredata.info/listinfo/gem-dev
¡El pueblo unido jamás será vencido!