Hello!
I'm writing a program that have to open all rawmidi ports, and
periodically remove nonexisting ones, and open new ones (read, deal
with usb-midi connect/disconnect).
For example, we have USB-midi interface with 2 ports: hw:1,0,0 and hw:1,0,1
To get the list, I make snd_ctl_open("hw:1), then walk through
devices/subdevices and try to open all rawmidi ports. The problem is,
that I can only open first one - hw:1,0,0, trying to open another
gives "Device or resource is busy".
If I do NOT have ctl opened, I can open all subdevices without trouble.
Another releated question is: how can I detect connection of a new
usb-midi device?
For now I use inotify on /dev/snd, but it's a kludge, cause I have to
add sleep(1) before actual rescan of devices, or I miss the update.
Best regards,
Dmitry.
P.S. Im not a subscriber, please cc me in your replies
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