mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-11-01 22:58:50 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

alsa-seq: handle large control events

Browse source 
Handle the case where the control event is large and needs to be
encoded into multiple midi events.
This commit is contained in:
Wim Taymans 2024-05-09 18:49:00 +02:00
parent 7dcfe81690
commit cb8330c798
1 changed files with 41 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

75
spa/plugins/alsa/alsa-seq.c
View file

@ -644,47 +644,54 @@ static int process_write(struct seq_state *state)
} }
SPA_POD_SEQUENCE_FOREACH(pod, c) { SPA_POD_SEQUENCE_FOREACH(pod, c) {
long s; long s, body_size;
uint8_t *body;
if (c->type != SPA_CONTROL_Midi) if (c->type != SPA_CONTROL_Midi)
continue; continue;
if (size == 0) body = SPA_POD_BODY(&c->value);
/* only reset when we start decoding a new message */ body_size = SPA_POD_BODY_SIZE(&c->value);
snd_seq_ev_clear(&ev);
if ((s = snd_midi_event_encode(stream->codec, while (body_size > 0) {
SPA_POD_BODY(&c->value), if (size == 0)
SPA_POD_BODY_SIZE(&c->value), &ev)) < 0) { /* only reset when we start decoding a new message */
spa_log_warn(state->log, "failed to encode event: %s", snd_seq_ev_clear(&ev);
snd_strerror(s));
snd_midi_event_reset_encode(stream->codec); if ((s = snd_midi_event_encode(stream->codec,
body, body_size, &ev)) < 0) {
spa_log_warn(state->log, "failed to encode event: %s",
snd_strerror(s));
snd_midi_event_reset_encode(stream->codec);
size = 0;
break;
}
body += s;
body_size -= s;
size += s;
if (ev.type == SND_SEQ_EVENT_NONE)
/* this can happen when the event is not complete yet, like
* a sysex message and we need to encode some more data. */
break;
snd_seq_ev_set_source(&ev, state->event.addr.port);
snd_seq_ev_set_dest(&ev, port->addr.client, port->addr.port);
out_time = state->queue_time + NSEC_FROM_CLOCK(&state->rate, c->offset);
out_rt.tv_nsec = out_time % SPA_NSEC_PER_SEC;
out_rt.tv_sec = out_time / SPA_NSEC_PER_SEC;
snd_seq_ev_schedule_real(&ev, state->event.queue_id, 0, &out_rt);
spa_log_info(state->log, "event %d time:%"PRIu64" offset:%d size:%ld port:%d.%d",
ev.type, out_time, c->offset, size, port->addr.client, port->addr.port);
if ((err = snd_seq_event_output(state->event.hndl, &ev)) < 0) {
spa_log_warn(state->log, "failed to output event: %s",
snd_strerror(err));
}
size = 0; size = 0;
continue;
} }
size += s;
if (ev.type == SND_SEQ_EVENT_NONE)
/* this can happen when the event is not complete yet, like
* a sysex message and we need to get some more data. */
continue;
snd_seq_ev_set_source(&ev, state->event.addr.port);
snd_seq_ev_set_dest(&ev, port->addr.client, port->addr.port);
out_time = state->queue_time + NSEC_FROM_CLOCK(&state->rate, c->offset);
out_rt.tv_nsec = out_time % SPA_NSEC_PER_SEC;
out_rt.tv_sec = out_time / SPA_NSEC_PER_SEC;
snd_seq_ev_schedule_real(&ev, state->event.queue_id, 0, &out_rt);
spa_log_trace_fp(state->log, "event %d time:%"PRIu64" offset:%d size:%ld port:%d.%d",
ev.type, out_time, c->offset, size, port->addr.client, port->addr.port);
if ((err = snd_seq_event_output(state->event.hndl, &ev)) < 0) {
spa_log_warn(state->log, "failed to output event: %s",
snd_strerror(err));
}
size = 0;
} }
} }
snd_seq_drain_output(state->event.hndl); snd_seq_drain_output(state->event.hndl);