beware of dumpOSC (was Re: [OSC_dev] No dumpOSC output in pipe in non-interactive terminal)

[Torsten Anders]

Thanks for detailing that.

Torsten

On Sep 9, 2007, at 5:32 AM, Martin Peach wrote:
> Pd's [dumpOSC] uses code from dumpOSC and [unpackOSC] is built on  
> [dumpOSC] with additional support for timetags. [unpackOSC] takes  
> lists of bytes (as floats) as input. The input bytes are supposed  
> to come from [udpreceive] or something like that, so the transport  
> is separated from the OSC protocol. The timetag data is output as a  
> delay in milliseconds so that pd's delay objects can use it to  
> schedule events.
>
> Martin
>
> Torsten Anders wrote:
>> Dear IOhannes,
>>
>> Thanks for sharing this issue. Just for my information: Pd's  
>> [unpackOSC] uses code from dumpOSC?
>>
>> Best
>> Torsten
>>
>> On Sep 8, 2007, at 8:32 PM, IOhannes m zmoelnig wrote:
>>> hi
>>>
>>> Stephen Sinclair wrote:
>>>> Looking at the dumpOSC.c source file, there is nothing special
>>>
>>> apart from the fact that dumpOSC uses some pointer casting magic.
>>> this seriously screws up, when you just use the code in a naive  
>>> way and
>>> turn on compiler optimization.
>>> (gcc>=3.0 and "-fstrict-alignment" cannot be used in conjunction  
>>> with
>>> pointer reinterpret casts)
>>> i just recently discovered this problem in one of Pd's
>>> OSC-implementations [1], which is basically a copy'n'paste of  
>>> dumpOSC.
>>>
>>> if you want to use dumpOSC code and use compiler optimization at the
>>> same time, you should fix this e.g. by explicitely using unions.
>>>
>>>
>>> mmfga.sdr
>>> IOhannes
>>>
>>>
>>> [1] see
>>> http://sourceforge.net/tracker/index.php? 
>>> func=detail&aid=1788587&group_id=55736&atid=478070
>>> for my troubles...
>>> _______________________________________________
>>> OSC_dev mailing list
>>> OSC_dev at create.ucsb.edu
>>> http://www.create.ucsb.edu/mailman/listinfo/osc_dev
>>
>> -- 
>> Torsten Anders
>> Interdisciplinary Centre for Computer Music Research
>> University of Plymouth
>> http://strasheela.sourceforge.net
>> http://www.torsten-anders.de
>>
>>
>> _______________________________________________
>> OSC_dev mailing list
>> OSC_dev at create.ucsb.edu
>> http://www.create.ucsb.edu/mailman/listinfo/osc_dev
>>
>
> _______________________________________________
> OSC_dev mailing list
> OSC_dev at create.ucsb.edu
> http://www.create.ucsb.edu/mailman/listinfo/osc_dev

--
Torsten Anders
Interdisciplinary Centre for Computer Music Research
University of Plymouth
http://strasheela.sourceforge.net
http://www.torsten-anders.de