1 Mar
2007
1 Mar
'07
1:12 p.m.
On Thu, March 1, 2007 13:35, Dmitry Baikov wrote:
Hi!
I nearly finished alsaseq driver for jackmidi, but have a problem.
Alsaseq reorders events in fast sequences, so note-on/note-off pairs got
mixed.
The algorithm of sending is simple:
snd_seq_ev_schedule_real(&alsa_event, output_que, 1, ×tamp);
frame_time = jack_frame_time(self->jack); frame_offset = event.time -
frame_time;
offset = ((long long)frame_offset) * 1000000000 / rate; timestamp.tv_sec =
(long) (offset / 1000000000);
timestamp.tv_nsec = (long) (offset % 1000000000);
snd_seq_event_output(self->seq, &alsa_event);
Is the snd_seq_ev_schedule_real correct where it is? Or should you call
_after_ you set the intended timestamp, like this:
frame_time = jack_frame_time(self->jack);
frame_offset = event.time - frame_time;
offset = ((long long)frame_offset) * 1000000000 / rate;
timestamp.tv_sec = (long) (offset / 1000000000);
timestamp.tv_nsec = (long) (offset % 1000000000);
snd_seq_ev_schedule_real(&alsa_event, output_que, 1, ×tamp);
snd_seq_event_output(self->seq, &alsa_event);
Cheers.
--
rncbc aka Rui Nuno Capela
rncbc(a)rncbc.org