M. Gagnon wrote:
> Hi, i am now trying to port an application to linux using Alsa. At some
> point, i have midi bytes as char* and i have to play them. This is exactly
> the same data you'd find in a file, expect that it's in memory instead. How
> is that possible?
>
> If this is not possible, i could always take any help on playing midi using
> sequencers I looked at the docs, i found a few samples, but they seemed to
> be outdated and the one that could interest me segfaulted. After i debugged
> it and fixed the segfault, it played nothing... (and i'm sure my midi is
> configured correctly BTW, pmidi works and i also succeeded in getting single
> notes to play)
This is how I do playback in the freebob backend for jack:
for (s=0;s<samples_read;s++) {
signed int *byte=(buff+s);
snd_seq_event_t ev;
if ((snd_midi_event_encode_byte(
port->parser,(*byte) & 0xFF, &ev)
) > 0) {
// a midi message is complete, send it out to ALSA
snd_seq_ev_set_subs(&ev);
snd_seq_ev_set_direct(&ev);
snd_seq_ev_set_source(&ev, port->seq_port_nr);
snd_seq_event_output_direct(port->seq_handle, &ev); }
}
you can check the freebob_driver_midi_* functions in the freebob jack
backend for more detail.
Pieter
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