Denis wrote:
> I wrote a c code to send MIDI message "NOTE ON" to sequencer, but I get
> "Segmentation fault".
> What's wrong with it?
Some fields of ev contain random data, so you better clear it before using
it:
snd_seq_ev_clear(&ev);
> ev.type = SND_SEQ_EVENT_NOTEON;
> ev.data.note.channel = 0x00;
> ev.data.note.note = 0x30;
> ev.data.note.velocity = 0x7f;
> ev.data.note.duration = 0x7f;
.duration isn't needed for a _NOTEON event (only for _NOTE event, and then
you would need a running queue).
And some other fields need to be set (see seqmid.h for the definitions of
these macros):
snd_seq_ev_set_source(&ev, portid); // source port
snd_seq_ev_set_subs(&ev); // send to all subscribers
snd_seq_ev_set_direct(&ev); // send directly, not through a queue
> snd_seq_event_output_direct(ctxp,&ev);
Now it should be working.
HTH
Clemens
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