[PD-dev] Can somebody help to create a desktop / VST / AU version of a PD / libPD / app ?

Miller Puckette msp at ucsd.edu
Wed Apr 22 21:35:10 CEST 2015 

Aha - sometimes things crash on OSX because of "minor" buffer overruns that
linux just soldiers past.  I'll break out a mac and try again...

M

On Wed, Apr 22, 2015 at 03:03:09AM -0400, Dan Wilcox wrote:
> Weird. It crashes for me on OSX when libpd is built with -O3 and the program is built with or without -O3.
> 
> *Note: I just finished reorganizing the libpd samples by language name. If you do a pull, the multi instance test is now located in samples/c/pdtest_multi 
> 
> Rebuilding and running it again yields:
> 
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: 13 at address: 0x0000000000000000
> outlet_float (x=0x3f7ffc2a3f7ffc38, f=0) at m_obj.c:388
> 388	    for (oc = x->o_connections; oc; oc = oc->oc_next)
> 
> #0  outlet_float (x=0x3f7ffc2a3f7ffc38, f=0) at m_obj.c:388
> #1  0x000000010006f0b9 in outlet_bang (x=<value temporarily unavailable, due to optimizations>) at m_obj.c:363
> #2  0x00000001000953f9 in metro_tick (x=0x10021ad90) at x_time.c:162
> #3  0x0000000100071010 in sched_tick () at m_sched.c:418
> #4  0x0000000100096733 in libpd_process_float (ticks=1, inBuffer=<value temporarily unavailable, due to optimizations>, outBuffer=<value temporarily unavailable, due to optimizations>) at z_libpd.c:185
> #5  0x0000000100000d67 in main ()
> 
> some frame detail:
> 
> (gdb) frame 0
> #0  outlet_float (x=0x3f7ffc2a3f7ffc38, f=0) at m_obj.c:388
> 388	    for (oc = x->o_connections; oc; oc = oc->oc_next)
> (gdb) frame 1
> #1  0x000000010006f0b9 in outlet_bang (x=<value temporarily unavailable, due to optimizations>) at m_obj.c:363
> 363	        pd_bang(oc->oc_to);
> (gdb) frame 2
> #2  0x00000001000953f9 in metro_tick (x=0x10021ad90) at x_time.c:162
> 162	    outlet_bang(x->x_obj.ob_outlet);
> (gdb) frame 3
> #3  0x0000000100071010 in sched_tick () at m_sched.c:418
> 418	        (*c->c_fn)(c->c_owner);
> (gdb) frame 4
> #4  0x0000000100096733 in libpd_process_float (ticks=1, inBuffer=<value temporarily unavailable, due to optimizations>, outBuffer=<value temporarily unavailable, due to optimizations>) at z_libpd.c:185
> 185	  PROCESS(,)
> (gdb) frame 5
> #5  0x0000000100000d67 in main ()
> 
> --------
> Dan Wilcox
> @danomatika
> danomatika.com <http://danomatika.com/>
> robotcowboy.com <http://robotcowboy.com/>
> > On Apr 22, 2015, at 12:15 AM, Miller Puckette <msp at ucsd.edu> wrote:
> > 
> > I think it was optimized since I had already made libpd, not from the
> > sampes/.../multi directory.  But anyhow I re-did it as you suggest with
> > the same result....  can't make it fail...
> > 
> > cheers
> > M
> > 
> > On Wed, Apr 22, 2015 at 12:03:28AM -0400, Dan Wilcox wrote:
> >> You ran it without the optimizations since I added the debug option. Remove DEBUG=true from line 33 in the Makefile: https://github.com/libpd/libpd/blob/master/samples/c_samples/multi/Makefile#L33 <https://github.com/libpd/libpd/blob/master/samples/c_samples/multi/Makefile#L33> and do a full clean before rebuilding:
> >> 
> >> cd ../../../ && make clobber && cd - && make
> >> --------
> >> Dan Wilcox
> >> @danomatika
> >> danomatika.com <http://danomatika.com/>
> >> robotcowboy.com <http://robotcowboy.com/>
> >>> On Apr 21, 2015, at 11:57 PM, Miller Puckette <msp at ucsd.edu> wrote:
> >>> 
> >>> Hi Dan et al -
> >>> 
> >>> I gave this a try:
> >>> 
> >>> git clone https://github.com/libpd/libpd.git
> >>> 
> >>> [copies pd sources into libpd/pure-data]
> >>> 
> >>> cd libpd
> >>> make
> >>> 
> >>> cd samples/c_samples/multi/
> >>> make
> >>> ./multi_pdtest multi_test.pd `pwd`
> >>> 
> >>> and got output:
> >>> 
> >>> print: 0
> >>> 1003-frequency: bang
> >>> print: 0
> >>> 1004-frequency: bang
> >>> 1003-frequency: 1
> >>> 1004-frequency: 2
> >>> 1.000000 1.000000 0.999999 0.999999 0.999998 0.999998 0.999997 0.999997 
> >>> 1.000000 1.000000 0.999998 0.999998 0.999996 0.999996 0.999995 0.999995 
> >>> print: 1
> >>> 0.999944 0.999944 0.999943 0.999943 0.999942 0.999942 0.999941 0.999941 
> >>> print: 1
> >>> 0.999815 0.999815 0.999810 0.999810 0.999804 0.999804 0.999799 0.999799 
> >>> print: 2
> >>> print: 2
> >>> 
> >>> This on Fedora 21, 64 bits, Intel hardware.  
> >>> 
> >>> I guess something subtle is happening, maybe in Pd and unrelated to libpd?
> >>> 
> >>> cheers
> >>> Miller
> >>> 
> >>> On Tue, Apr 21, 2015 at 06:00:15PM -0400, Dan Wilcox wrote:
> >>>> Howdy Miller,
> >>>> 
> >>>> Following up from the dev list last year, I added your multi instance test to the c samples included with libpd: https://github.com/libpd/libpd/tree/master/samples/c_samples/multi <https://github.com/libpd/libpd/tree/master/samples/c_samples/multi>
> >>>> 
> >>>> The one thing I want to double check is the changes to z_libpd.c you mentioned in http://lists.puredata.info/pipermail/pd-dev/2014-05/019832.html: <http://lists.puredata.info/pipermail/pd-dev/2014-05/019832.html:>
> >>>> 
> >>>>> Here's how I modified libpd_wrapper/z_libpd.c:
> >>>>> 
> >>>>> 55d54
> >>>>> <   sys_time = 0;
> >>>>> 110c109
> >>>>> <   sched_tick(sys_time + sys_time_per_dsp_tick);
> >>>>> ---
> >>>>>> 
> >>>>>  sched_tick();
> >>>>> 
> >>>>> 130c129
> >>>>> <     sched_tick(sys_time + sys_time_per_dsp_tick); \
> >>>>> ---
> >>>>>> 
> >>>>>    sched_tick(); \
> >>>> 
> >>>> 
> >>>> Currently, that line is https://github.com/libpd/libpd/blob/master/libpd_wrapper/z_libpd.c#L171 <https://github.com/libpd/libpd/blob/master/libpd_wrapper/z_libpd.c#L171> and I’m getting a segfault if I replace it with sched_tick(); AND set gcc optimization to -O3
> >>>> 
> >>>> Here’s a gdb backtrace:
> >>>> 
> >>>> #0  0x0000000100091f2f in outlet_float (x=0x3f7ffc2a3f7ffc38, f=0.999937057) at m_obj.c:388
> >>>> #1  0x00000001000ac572 in pdfloat_bang (x=0x10021ac20) at x_connective.c:89
> >>>> #2  0x0000000100093d58 in pd_bang (x=0x10021ac20) at m_pd.c:267
> >>>> #3  0x0000000100091ddd in outlet_bang (x=0x10021ae20) at m_obj.c:363
> >>>> #4  0x00000001000c45e4 in metro_tick (x=0x10021ada0) at x_time.c:162
> >>>> #5  0x0000000100095021 in sched_tick () at m_sched.c:418
> >>>> #6  0x00000001000c5d4d in libpd_process_float (ticks=1, inBuffer=0x7fff5fbffa50, outBuffer=0x7fff5fbff750) at z_libpd.c:173
> >>>> #7  0x0000000100000d18 in main ()
> >>>> 
> >>>> If I don’t optimize, it works fine:
> >>>> 
> >>>> print: 0
> >>>> 1003-frequency: bang
> >>>> print: 0
> >>>> 1004-frequency: bang
> >>>> 1003-frequency: 1
> >>>> 1004-frequency: 2
> >>>> 1.000000 1.000000 0.999999 0.999999 0.999998 0.999998 0.999997 0.999997 
> >>>> 1.000000 1.000000 0.999998 0.999998 0.999996 0.999996 0.999995 0.999995 
> >>>> print: 1
> >>>> 0.999944 0.999944 0.999943 0.999943 0.999942 0.999942 0.999941 0.999941 
> >>>> print: 1
> >>>> 0.999815 0.999815 0.999810 0.999810 0.999804 0.999804 0.999799 0.999799 
> >>>> print: 2
> >>>> print: 2
> >>>> 
> >>>> --------
> >>>> Dan Wilcox
> >>>> @danomatika
> >>>> danomatika.com <http://danomatika.com/>
> >>>> robotcowboy.com <http://robotcowboy.com/>
> >>>>> On Apr 21, 2015, at 10:56 AM, Kjetil Matheussen <k.s.matheussen at gmail.com> wrote:
> >>>>> 
> >>>>> But for libpd, are you sure you need to add anything? Can't just the user
> >>>>> call the pdinstance_new and pd_setinstance functions directly?
> >>>>> 
> >>>>> http://lists.puredata.info/pipermail/pd-dev/2014-05/019832.html <http://lists.puredata.info/pipermail/pd-dev/2014-05/019832.html>
> >>>>> 
> >>>>> 
> >>>>> (BTW. When I wrote about libpds, I hadn't forgotten about the support for pd instances,
> >>>>> but since I didn't have all details in my head then, I didn't mention it. I should have though.)
> >>>>> 
> >>>>> 
> >>>>> On Tue, Apr 21, 2015 at 4:42 PM, Dan Wilcox <danomatika at gmail.com <mailto:danomatika at gmail.com>> wrote:
> >>>>> This should be possible with the current version of libpd which includes Miller’s multiple instance updates, see http://lists.puredata.info/pipermail/pd-dev/2014-05/019839.html <http://lists.puredata.info/pipermail/pd-dev/2014-05/019839.html>
> >>>>> 
> >>>>> I just haven’t gotten around to adding libpd-specific wrapper functions for this yet, but Miller provides code in that dev list exchange.
> >>>>> 
> >>>>> --------
> >>>>> Dan Wilcox
> >>>>> @danomatika
> >>>>> danomatika.com <http://danomatika.com/>
> >>>>> robotcowboy.com <http://robotcowboy.com/>
> >>>>>> On Apr 21, 2015, at 6:00 AM, pd-dev-request at lists.iem.at <mailto:pd-dev-request at lists.iem.at> wrote:
> >>>>>> 
> >>>>>> From: Oliver Greschke <info at o-g-sus.de <mailto:info at o-g-sus.de>>
> >>>>>> Subject: [PD-dev] Can somebody help to create a desktop / VST / AU version of a PD / libPD / app ?
> >>>>>> Date: April 21, 2015 at 3:15:44 AM EDT
> >>>>>> To: pd-dev at lists.iem.at <mailto:pd-dev at lists.iem.at>
> >>>>>> 
> >>>>>> 
> >>>>>> Hi,
> >>>>>> I am the creator of the Elastic Drums iOS app (with great PD help from Matt Davey).
> >>>>>> It’s made with PureData, libPD and Objective-C.
> >>>>>> I got asked a couple of times now, if there will be ever a standalone desktop version or even better Plugin (VST, AU) version of the app.
> >>>>>> 
> >>>>>> As far as I know, there are not ready to use workarounds to do so. Which is sad, because I can imagine a lot of fantastic plugins emerging from PD
> >>>>>> 
> >>>>>> Has somebody here some experience with doing such ports?
> >>>>>> Then please contact me.
> >>>>>> 
> >>>>>> Cheers,
> >>>>>> Oliver
> >>>>>> 
> >>>>>> info at o-g-sus.de <mailto:info at o-g-sus.de>
> >>>>> 
> >>>>> _______________________________________________
> >>>>> Pd-dev mailing list
> >>>>> Pd-dev at lists.iem.at <mailto:Pd-dev at lists.iem.at>
> >>>>> http://lists.puredata.info/listinfo/pd-dev <http://lists.puredata.info/listinfo/pd-dev>
> >>>>> 
> >>>>> 
> >>>> 
> >>> 
> >>>> _______________________________________________
> >>>> Pd-dev mailing list
> >>>> Pd-dev at lists.iem.at
> >>>> http://lists.puredata.info/listinfo/pd-dev
> >>> 
> >> 
>

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