[PD-dev] On RHEL5 mrpeach's packOSC sometimes generates negative values incompatible with udpsend for floats and negative input values

[Martin Peach]

Hi Adrian,

I think that must be an older version of packOSC. I'm sure I fixed all 
that. It's not hard to compile your own as it doesn't depend on any 
libs. If you get pd trunk from svn and do "make mrpeach" from the 
externals directory it usually works. No need to build everything. Then 
you need to copy the *.pd_linux and *-help.pd patches to wherever pd is 
installed.

Martin

On 2011-04-14 02:55, Adrian Corston wrote:
> I am a PD newbie running PD on RHEL5 using RPMs downloaded from here:
>
> http://ccrma-www.stanford.edu/planetccrma/mirror/centos/linux/planetccrma/5/i386/
>
>
> OS is RHEL 5.5 and uname -a says: Linux myhost 2.6.18-194.el5 #1 SMP Tue
> Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
>
> Using the PD file below (based on one I found somewhere) I see packOSC
> outputting negative numbers when floats or negative numbers are input.
>
> #N canvas 2929 425 631 244 10;
> #X obj 210 115 mrpeach/packOSC;
> #X msg 210 24 send /int 1;
> #X msg 258 77 send /negative -1;
> #X msg 234 53 send /float 0.1;
> #X text 293 24 <- works well;
> #X text 343 53 <- convert float to negative value: ERROR!;
> #X text 375 77 <- negative value. ERROR!;
> #X obj 210 151 print;
> #X connect 0 0 7 0;
> #X connect 1 0 0 0;
> #X connect 2 0 0 0;
> #X connect 3 0 0 0;
>
> Clicking on the send buttons in order, I see this output, the latter two
> lines of which udpsend won't accept (it expects an array of positive
> octets and prints an error when it receives negative numbers.)
>
> print: 47 105 110 116 0 0 0 0 44 105 0 0 0 0 0 1
> print: 47 102 108 111 97 116 0 0 44 102 0 0 61 -52 -52 -51
> print: 47 110 101 103 97 116 105 118 101 0 0 0 44 105 0 0 -1 -1 -1 -1
>
> I am guessing it might be a issue with octet signing - for the last
> example (send /negative -1) it looks like "-1 -1 -1 -1" maybe should be
> "255 255 255 255" which I am guessing would represent -1. But I'm no OSC
> expert.
>
> Does it look like a problem with the RPM? It's the only one I could find
> for RHEL5. I had a whole bunch of trouble compiling pd-extended from
> source but I suspect I might need to go back to that option.
>
> Thanks for any help you can provide,
> Adrian.
>
>
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