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.<br><br><div class="gmail_quote">On Fri, Mar 6, 2009 at 12:59 PM, B. Bogart <span dir="ltr">&lt;<a href="mailto:ben@ekran.org">ben@ekran.org</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hey all,<br>
<br>
Is there a way to share a whole pix_buffer between PD processes?<br>
<br>
I&#39;m running my SOM stuff in a second PD instance (to make use of the<br>
second core in my installation machine). But as I&#39;m developing both PD<br>
instances are getting more coupled and I&#39;d like to share a whole<br>
pix_buffer.<br>
<br>
The alternative is using two [pix_share]s, one for input the other for<br>
output, controlled by netsend. The problem with this is that I need to<br>
send a lot of data quickly, 10ms between new images, and I think that<br>
could cause lots of problems.<br>
<br>
I don&#39;t think I&#39;ll be able to get the CPU usage of the second patch down<br>
low enough to not interfere with rendering in the main PD patch.<br>
<br>
Thanks,<br>
B.<br>
<br>
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</blockquote></div><br>