Hi I cannot help you debug [netsend~] and [netreceive~], but there are probably other ways to achieve the same.
I just saw a commit from mrpeach to pd-svn. It seems, that he added [udpsend~] and [udpreceive~] to his 'net' section. Alternatively, you could built similar functionality yourself with the help of zexy's [pack~] and [unpack~] and the non-signal [udpsend] and [udpreceive]. Of course, this would mean, that you would have to implement the mux/demux stuff yourself (convert each sample to two or more 8bit values, pack several channels into one stream). Roman On Sat, 2010-01-09 at 15:12 -0500, Michal Seta wrote: > Hi all, > > Happy new decade! > > I have been playing around with the above captioned pair of externs. > I grabbed them from the audioscape project . > > I intend to use them for jamming over WiFi (and it has to be WiFi). > My first tests are rather promising but there are some glitches. > [netreceive~] tends to crash pd with a lot of underflows. This seems > to happen mostly whenever WiFi signal strength is not optimal (in the > 50-60% range). For the moment, the idea is that the jamming happens > using netbooks running linux. 5 players will send mono signals to a > server which will play back the 5 signals directly and send back mono > signals, one to each player. Currently I am testing on an Acer Aspire > One (atom 1.6), Ubuntu Karmic and pd-extended 0.42.5. > > Also, I have compiled those externals for MacOSX but they seem to not > be working correctly, all I get is sporadic short bursts of audio (on > Mac receiving side). The mac was wired but not to the same network (2 > linux machines, one on WiFi and antoher on wired, also different > networks, can keep going for several minutes before one of them > crashes). > > I am running netsend~/receive~ in UDP mode. > > Below are backtraces. > > Thanks for any insight, tips etc. > > ./MiS > > gdb backtrace: > #0 0x00b36422 in __kernel_vsyscall () > #1 0x002644d1 in raise () from /lib/tls/i686/cmov/libc.so.6 > #2 0x00267932 in abort () from /lib/tls/i686/cmov/libc.so.6 > #3 0x0029aee5 in ?? () from /lib/tls/i686/cmov/libc.so.6 > #4 0x002a4ff1 in ?? () from /lib/tls/i686/cmov/libc.so.6 > #5 0x002a83eb in ?? () from /lib/tls/i686/cmov/libc.so.6 > #6 0x002a9039 in calloc () from /lib/tls/i686/cmov/libc.so.6 > #7 0x080b9e0d in getbytes (nbytes=16) at m_memory.c:24 > #8 0x080c6600 in sys_queuegui (client=0x864fad8, glist=0x8627a88, > f=0x80b2c20 <vu_draw_update>) at s_inter.c:815 > #9 0x080b313d in vu_ft1 (x=0x864fad8, peak=-97) at g_vumeter.c:623 > #10 0x080b6516 in pd_typedmess (x=0x864fad8, s=0x8521d60, argc=1, > argv=0xbfffef30) at m_class.c:792 > #11 0x080b682f in pd_vmess (x=0x864fad8, sel=0x8521d60, fmt=0x8105b2f "f") > at m_class.c:855 > #12 0x080b951e in inlet_float (x=0x6, f=-97) at m_obj.c:100 > #13 0x080b8f3f in obj_list (x=0x864fad8, s=0x8111b70, argc=2, argv=0x864f8f0) > at m_obj.c:270 > #14 0x080b89ff in outlet_list (x=0x864f938, s=0x8111b70, argc=2, > argv=0x864f8f0) at m_obj.c:431 > #15 0x080e4a3e in pack_bang (x=0x864f8a0) at x_connective.c:718 > #16 0x080b8c37 in outlet_float (x=0x864f840, f=-97) at m_obj.c:397 > #17 0x080e5ce1 in trigger_list (x=0x864f800, s=0x0, argc=1, argv=0xbffff0d8) > at x_connective.c:979 > #18 0x080e5fb7 in trigger_float (x=0x864f800, f=-97) at x_connective.c:1025 > #19 0x080b8c37 in outlet_float (x=0x864f550, f=-97) at m_obj.c:397 > #20 0x080b8c37 in outlet_float (x=0x864f450, f=0) at m_obj.c:397 > #21 0x08059af2 in env_tilde_tick (x=0x864f370) at d_ctl.c:671 > #22 0x080c33bc in sched_tick (next_sys_time=925163520) at m_sched.c:374 > #23 0x080c3803 in m_pollingscheduler () at m_sched.c:484 > #24 m_mainloop () at m_sched.c:560 > #25 0x080c64c9 in sys_main (argc=2, argv=0xbffff344) at s_main.c:304 > #26 0x080ce16b in main (argc=2, argv=0xbffff344) at s_entry.c:32 > > > And this at the moment it crashed: > > *** glibc detected *** /usr/bin/pd: malloc(): memory corruption > (fast): 0x086df120 *** > ======= Backtrace: ========= > /lib/tls/i686/cmov/libc.so.6[0x2a4ff1] > /lib/tls/i686/cmov/libc.so.6[0x2a83eb] > /lib/tls/i686/cmov/libc.so.6(__libc_calloc+0xa9)[0x2a9039] > /usr/bin/pd(getbytes+0x1d)[0x80b9e0d] > ======= Memory map: ======== > 00110000-001d2000 r-xp 00000000 08:05 1661634 /usr/lib/libasound.so.2.0.0 > 001d2000-001d6000 r--p 000c1000 08:05 1661634 /usr/lib/libasound.so.2.0.0 > 001d6000-001d7000 rw-p 000c5000 08:05 1661634 /usr/lib/libasound.so.2.0.0 > 001d7000-001d9000 r-xp 00000000 08:05 1221747 > /lib/tls/i686/cmov/libdl-2.10.1.so > 001d9000-001da000 r--p 00001000 08:05 1221747 > /lib/tls/i686/cmov/libdl-2.10.1.so > 001da000-001db000 rw-p 00002000 08:05 1221747 > /lib/tls/i686/cmov/libdl-2.10.1.so > 001db000-001dd000 r-xp 00000000 08:05 1385642 /usr/lib/libXdamage.so.1.1.0 > 001dd000-001de000 rw-p 00001000 08:05 1385642 /usr/lib/libXdamage.so.1.1.0 > 001de000-001e5000 r-xp 00000000 08:05 1665962 /usr/lib/libSM.so.6.0.0 > 001e5000-001e6000 r--p 00006000 08:05 1665962 /usr/lib/libSM.so.6.0.0 > 001e6000-001e7000 rw-p 00007000 08:05 1665962 /usr/lib/libSM.so.6.0.0 > 001e7000-001eb000 r-xp 00000000 08:05 1664871 /usr/lib/libXtst.so.6.1.0 > 001eb000-001ec000 r--p 00004000 08:05 1664871 /usr/lib/libXtst.so.6.1.0 > 001ec000-001ed000 rw-p 00005000 08:05 1664871 /usr/lib/libXtst.so.6.1.0 > 001ed000-00224000 r-xp 00000000 08:05 1221679 /lib/libdbus-1.so.3.4.0 > 00224000-00225000 r--p 00036000 08:05 1221679 /lib/libdbus-1.so.3.4.0 > 00225000-00226000 rw-p 00037000 08:05 1221679 /lib/libdbus-1.so.3.4.0 > 00226000-0022a000 r-xp 00000000 08:05 1662885 /usr/lib/libXdmcp.so.6.0.0 > 0022a000-0022b000 rw-p 00003000 08:05 1662885 /usr/lib/libXdmcp.so.6.0.0 > 0022b000-0022f000 r-xp 00000000 08:05 1665042 /usr/lib/libXxf86vm.so.1.0.0 > 0022f000-00230000 r--p 00003000 08:05 1665042 /usr/lib/libXxf86vm.so.1.0.0 > 00230000-00231000 rw-p 00004000 08:05 1665042 /usr/lib/libXxf86vm.so.1.0.0 > 00231000-00235000 r-xp 00000000 08:05 1665814 /usr/lib/libXfixes.so.3.1.0 > 00235000-00236000 r--p 00003000 08:05 1665814 /usr/lib/libXfixes.so.3.1.0 > 00236000-00237000 rw-p 00004000 08:05 1665814 /usr/lib/libXfixes.so.3.1.0 > 00237000-00239000 r-xp 00000000 08:05 1385644 /usr/lib/libXinerama.so.1.0.0 > 00239000-0023a000 rw-p 00001000 08:05 1385644 /usr/lib/libXinerama.so.1.0.0 > 0023a000-00378000 r-xp 00000000 08:05 1221709 > /lib/tls/i686/cmov/libc-2.10.1.so > 00378000-00379000 ---p 0013e000 08:05 1221709 > /lib/tls/i686/cmov/libc-2.10.1.so > 00379000-0037b000 r--p 0013e000 08:05 1221709 > /lib/tls/i686/cmov/libc-2.10.1.so > 0037b000-0037c000 rw-p 00140000 08:05 1221709 > /lib/tls/i686/cmov/libc-2.10.1.so > 0037c000-0037f000 rw-p 00000000 00:00 0 > 0037f000-00385000 r-xp 00000000 08:05 1661834 /usr/lib/libv4l2.so.0 > 00385000-00386000 r--p 00005000 08:05 1661834 /usr/lib/libv4l2.so.0 > 00386000-00389000 rw-p 00006000 08:05 1661834 /usr/lib/libv4l2.so.0 > 00389000-00391000 r-xp 00000000 08:05 1667003 /usr/lib/libdrm.so.2.4.0 > 00391000-00392000 r--p 00007000 08:05 1667003 /usr/lib/libdrm.so.2.4.0 > 00392000-00393000 rw-p 00008000 08:05 1667003 /usr/lib/libdrm.so.2.4.0 > 00393000-00394000 r-xp 00000000 08:05 2285962 > /usr/lib/pd/extra/libdir.pd_linux > 00394000-00395000 r--p 00000000 08:05 2285962 > /usr/lib/pd/extra/libdir.pd_linux > 00395000-00396000 rw-p 00001000 08:05 2285962 > /usr/lib/pd/extra/libdir.pd_linux > 00398000-003d6000 r-xp 00000000 08:05 1664250 /usr/lib/libpulse.so.0.12.0 > 003d6000-003d7000 r--p 0003d000 08:05 1664250 /usr/lib/libpulse.so.0.12.0 > 003d7000-003d8000 rw-p 0003e000 08:05 1664250 /usr/lib/libpulse.so.0.12.0 > 003d8000-00502000 r-xp 00000000 08:05 1661788 /usr/lib/libX11.so.6.2.0 > 00502000-00503000 ---p 0012a000 08:05 1661788 /usr/lib/libX11.so.6.2.0 > 00503000-00504000 r--p 0012a000 08:05 1661788 /usr/lib/libX11.so.6.2.0 > 00504000-00506000 rw-p 0012b000 08:05 1661788 /usr/lib/libX11.so.6.2.0 > 00506000-00507000 rw-p 00000000 00:00 0 > 00507000-00512000 r-xp 00000000 08:05 1664126 > /usr/lib/libvorbisenc.so.2.0.3 > 00512000-00513000 r--p 0000a000 08:05 1664126 > /usr/lib/libvorbisenc.so.2.0.3 > 00513000-00603000 rw-p 0000b000 08:05 1664126 > /usr/lib/libvorbisenc.so.2.0.3 > 00603000-0060c000 r-xp 00000000 08:05 1664873 /usr/lib/liba52-0.7.4.so > 0060c000-0060d000 rw-p 00008000 08:05 1664873 /usr/lib/liba52-0.7.4.so > 0060d000-0060e000 rw-p 00000000 00:00 0 > 0060f000-00616000 r-xp 00000000 08:05 1222043 > /lib/tls/i686/cmov/librt-2.10.1.so > 00616000-00617000 r--p 00006000 08:05 1222043 > /lib/tls/i686/cmov/librt-2.10.1.so > 00617000-00618000 rw-p 00007000 08:05 1222043 > /lib/tls/i686/cmov/librt-2.10.1.so > 00618000-00633000 r-xp 00000000 08:05 1662988 /usr/lib/libdv.so.4.0.3 > 00633000-00634000 r--p 0001b000 08:05 1662988 /usr/lib/libdv.so.4.0.3 > 00634000-00636000 rw-p 0001c000 08:05 1662988 /usr/lib/libdv.so.4.0.3 > 00636000-00642000 rw-p 00000000 00:00 0 > 00642000-00664000 r-xp 00000000 08:05 1384686 /usr/lib/libmpeg3.so.1.5.4 > 00664000-00669000 rw-p 00022000 08:05 1384686 /usr/lib/libmpeg3.so.1.5.4 > 00669000-0067c000 rw-p 00000000 00:00 0 > 0067c000-006ea000 r-xp 00000000 08:05 1662248 /usr/lib/libGLU.so.1.3.070600 > 006ea000-006eb000 r--p 0006e000 08:05 1662248 /usr/lib/libGLU.so.1.3.070600 > 006eb000-006ec000 rw-p 0006f000 08:05 1662248 /usr/lib/libGLU.so.1.3.070600 > 006ec000-00716000 r-xp 00000000 08:05 1665071 /usr/lib/libftgl.so.2.1.3 > 00716000-00718000 r--p 00029000 08:05 1665071 /usr/lib/libftgl.so.2.1.3 > 00718000-00719000 rw-p 0002b000 08:05 1665071 /usr/lib/libftgl.so.2.1.3 > 00719000-00721000 r-xp 00000000 08:05 1664038 > /usr/lib/libaviplayavutil-0.7.so.0.0.47 > 00721000-00722000 rw-p 00007000 08:05 1664038 > /usr/lib/libaviplayavutil-0.7.so.0.0.47 > 00722000-00724000 rw-p 00000000 00:00 0 > 00724000-00727000 r-xp 00000000 08:05 1664188 > /usr/lib/libaviplayvidix-0.7.so.0.0.47 > 00727000-00728000 rw-p 00002000 08:05 1664188 > /usr/lib/libaviplayvidix-0.7.so.0.0.47 > 00728000-00729000 rw-p 00000000 00:00 0 > 00729000-0072b000 r-xp 00000000 08:05 2284751 > /usr/lib/pd/extra/flatspace/pmpd.pd_linux > 0072b000-0072c000 r--p 00002000 08:05 2284751 > /usr/lib/pd/extra/flatspace/pmpd.pd_linux > 0072c000-0072d000 rw-p 00003000 08:05 2284751 > /usr/lib/pd/extra/flatspace/pmpd.pd_linux > 0072e000-00745000 r-xp 00000000 08:05 1661426 /usr/lib/libICE.so.6.3.0 > 00745000-00746000 r--p 00016000 08:05 1661426 /usr/lib/libICE.so.6.3.0 > 00746000-00747000 rw-p 00017000 08:05 1661426 /usr/lib/libICE.so.6.3.0 > 00747000-00749000 rw-p 00000000 00:00 0 > 00749000-00765000 r-xp 00000000 08:05 1221738 /lib/libgcc_s.so.1 > 00765000-00766000 r--p 0001b000 08:05 1221738 /lib/libgcc_s.so.1 > 00766000-00767000 rw-p 0001c000 08:05 1221738 /lib/libgcc_s.so.1 > 00767000-0077f000 r-xp 00000000 08:05 1664186 > /usr/lib/libaviplayswscale-0.7.so.0.0.47 > 0077f000-00780000 rw-p 00018000 08:05 1664186 > /usr/lib/libaviplayswscale-0.7.so.0.0.47 > 00780000-00789000 r-xp 00000000 08:05 1666209 /usr/lib/libXi.so.6.0.0 > Program received signal SIGABRT, Aborted. > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list 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