[PD-dev] Midi overflow, when receiving Song Position Pointer (os x)

[Miller Puckette]

OK... maybe got it working now (should be in git repo).  THanks for flagging it.

M

On Fri, Jul 05, 2013 at 04:36:46PM -0700, Miller Puckette wrote:
> Hmm... just looking at the code in s_midi_pm.c I can't understand how
> it could ever have worked for sysex or 'system' messages.  I'll see if
> I can get MIDI running on a MAC so I can try to fix it.
> 
> cheers
> Miller
> 
> On Wed, Jun 05, 2013 at 01:59:45PM +0200, Jan Baumgart wrote:
> > I've found the bad guy: it's the old version of the PortMidi
> > Library, that's packaged with pd's source. After replacing it with a
> > newer version (131) and recompiling, the midi overflow bug is gone.
> > I couldn't get the latest version of portmidi compiled on os x
> > 10.6.8 (probably a cmake issue).
> > 
> > Now that all midi messages are coming in, I've noticed that pd
> > handles some midi system messages incorrectly. Seems like Pd
> > assumes, that system messages always carry three data bytes (like
> > sysex messages). But there are messages like Midi Time Code or Song
> > Position Pointer, which have one or two data bytes.
> > 
> > cheers,
> > Jan
> > 
> > 
> > 
> > On 3.6.13 17:07 , Jan Baumgart wrote:
> > >Seems like [midirealtimein] is working under os x (although there's an
> > >obsolete error "message midirealtimein: works under MSW only").
> > >
> > >But when receiving a realtime messages (248, 250 or 252) [midiin] and
> > >[notein] output 0.
> > >Maybe this is related to the fifo overflow.
> > >
> > >Correction: the status byte for the song position pointer is 242 (dec -
> > >not hex)
> > >
> > >On 3.6.13 15:18 , Jan Baumgart wrote:
> > >>Hi there,
> > >>
> > >>I'm experiencing a severe bug, when sending a Song Position Pointer
> > >>message (0x242 0 0) to pd.
> > >>
> > >>After sending just one SPP message to pd, the status window says:
> > >>"warning: MIDI timing FIFO overflowed".
> > >>
> > >>When looking at the output of [midiin] I see "242 0 0 0" repeated
> > >>endlessly.
> > >>
> > >>The Song Position Pointer message belongs to the System Common Messages
> > >>and has two data bytes. Pd seems to get confused with this message.
> > >>Where is the third data byte coming from?
> > >>
> > >>I'm running precompiled vanilla pd-0.44-3 from puckette's site on 32-bit
> > >>intel mac (os x 10.6.8).
> > >>
> > >>
> > >>I have a related second question: Is there any way to receive midi
> > >>realtime messages with pd on os x? I'm trying to receive Midi Beat
> > >>Clock...
> > >>
> > >>
> > >>cheers,
> > >>Jan
> > 
> > _______________________________________________
> > Pd-dev mailing list
> > Pd-dev at iem.at
> > http://lists.puredata.info/listinfo/pd-dev
> 
> _______________________________________________
> Pd-dev mailing list
> Pd-dev at iem.at
> http://lists.puredata.info/listinfo/pd-dev