Re: rawmidi problem (was Re: ALSA homepage redesign)

[Thomas Fjellstrom <tfjellstrom@shaw.ca>]

On April 23, 2002 05:44 am, you wrote:
> At Tue, 23 Apr 2002 12:14:42 +0200,
>
> I wrote:
> > At Mon, 22 Apr 2002 13:50:27 -0600,
> >
> > Thomas Fjellstrom wrote:
> > > I don't hear any sound when playing midi using the rawmidi interface
> > > (using my SBLive! Value), I tried, some code written by me, and the
> > > rawmidi.c source demo that is included with the driver package. (A
> > > sound font is loaded, and midis play fine with sound, using the pmidi
> > > program.)
> >
> > hmm it looks like a bug was introduced in virmidi or in a combination
> > of virmidi and rawmidi.  i think the rawmidi itself works fine.
> > this problem appears only on emu10k1's virmidi.
> >
> > i'll take a further look at this problem.
>
> now fixed on cvs.  actually it was a bug on virmidi.
>
> thanks for your notice.
>

No problem, except now I've noticed a few things :)

One: SND_RAWMIDI_SYNC isn't a valid flag for snd_rawmidi_open.
( rawmidi_hw.c:221: snd_rawmidi_hw_open: Assertion `!(mode & 
~(0x0001|0x0002))' failed.)


Two: using SND_RAWMIDI_APPEND on snd_rawmidi_open causes an assert then a 
segfault.. A '0' for flags is fine... (see Three)
rawmidi.c:963: snd_rawmidi_write: Assertion `rawmidi' failed.
(this error is printed thousands of times... before a segfault)

Three: after a while, about a minute or so of playing a midi, the midi starts 
getting slower and slower.. and CPU usage goes to 0... I'm sure Its not the 
midi player, as I've tried it's 'DIGIMID' driver (which uses a converted 
soundfont to play through the digital pcm interface) and it doens't have this 
problem. 

(now I've got to reboot... because I can't think of another way to turn off 
the midi notes that were left on... :)

-- 
Thomas Fjellstrom
tfjellstrom@shaw.ca
http://strangesoft.net