pix_share does do exactly what you ask. The same buffer is used for both read and write and I moved 1920x1080@30fps between processes with no problem.
On Fri, Mar 6, 2009 at 12:59 PM, B. Bogart ben@ekran.org wrote:
Hey all,
Is there a way to share a whole pix_buffer between PD processes?
I'm running my SOM stuff in a second PD instance (to make use of the second core in my installation machine). But as I'm developing both PD instances are getting more coupled and I'd like to share a whole pix_buffer.
The alternative is using two [pix_share]s, one for input the other for output, controlled by netsend. The problem with this is that I need to send a lot of data quickly, 10ms between new images, and I think that could cause lots of problems.
I don't think I'll be able to get the CPU usage of the second patch down low enough to not interfere with rendering in the main PD patch.
Thanks, B.
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