/*
* event input callback from ALSA sequencer:
* the echo event is processed here.
*/
int
snd_seq_oss_event_input(snd_seq_event_t *ev, int direct, void *private_data,
int atomic, int hop)
{
seq_oss_devinfo_t *dp = (seq_oss_devinfo_t *)private_data;
evrec_t *rec;
if (ev->type != SNDRV_SEQ_EVENT_ECHO)
return snd_seq_oss_midi_input(ev, direct, private_data);
if (ev->source.client != dp->cseq)
return 0; /* ignored */
rec = (evrec_t*)&ev->data;
if (rec->s.code == SEQ_SYNCTIMER) {
/* sync echo back */
snd_seq_oss_writeq_wakeup(dp->writeq, rec->t.time);
} else {
/* echo back event */
if (dp->readq == NULL)
return 0;
snd_seq_oss_readq_put_event(dp->readq, rec);
}
return 0;
}
/*
* reset the write queue
*/
void
snd_seq_oss_writeq_clear(struct seq_oss_writeq *q)
{
struct snd_seq_remove_events reset;
memset(&reset, 0, sizeof(reset));
reset.remove_mode = SNDRV_SEQ_REMOVE_OUTPUT; /* remove all */
snd_seq_oss_control(q->dp, SNDRV_SEQ_IOCTL_REMOVE_EVENTS, &reset);
/* wake up sleepers if any */
snd_seq_oss_writeq_wakeup(q, 0);
}
