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Set "seq" alsa midi driver to maximum resolution possible 

Signed-off-by: falkTX <falktx@falktx.com>
This commit is contained in:
falkTX 2019-10-05 21:17:42 +01:00
parent fdfe11cf96
commit c8fd3f6a0f
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GPG Key ID: CDBAA37ABC74FBA0
1 changed files with 19 additions and 2 deletions
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21
linux/alsa/alsa_seqmidi.c
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@ -47,6 +47,7 @@
#include <pthread.h>
#include <time.h>
#include <ctype.h>
#include <limits.h>
#include "midiport.h"
#include "ringbuffer.h"
@ -95,6 +96,7 @@ typedef struct alsa_seqmidi {
jack_client_t *jack;
snd_seq_t *seq;
snd_seq_queue_timer_t* timer;
int client_id;
int port_id;
int queue;
@ -275,6 +277,10 @@ int alsa_seqmidi_attach(alsa_midi_t *m)
error_log("failed to open alsa seq");
return err;
}
if ((err = snd_seq_queue_timer_malloc(&self->timer)) < 0) {
error_log("failed to allocate timer");
return err;
}
snd_seq_set_client_name(self->seq, self->alsa_name);
self->port_id = snd_seq_create_simple_port(self->seq, "port",
SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_WRITE
@ -284,8 +290,17 @@ int alsa_seqmidi_attach(alsa_midi_t *m)
,SND_SEQ_PORT_TYPE_APPLICATION);
self->client_id = snd_seq_client_id(self->seq);
self->queue = snd_seq_alloc_queue(self->seq);
snd_seq_start_queue(self->seq, self->queue, 0);
self->queue = snd_seq_alloc_queue(self->seq);
// set high resolution
if (snd_seq_get_queue_timer(self->seq, self->queue, self->timer) == 0) {
snd_seq_queue_timer_set_resolution(self->timer, UINT_MAX);
snd_seq_set_queue_timer(self->seq, self->queue, self->timer);
} else {
error_log("failed to set alsa timer in high resolution");
}
snd_seq_start_queue(self->seq, self->queue, 0);
stream_attach(self, PORT_INPUT);
stream_attach(self, PORT_OUTPUT);
@ -313,6 +328,8 @@ int alsa_seqmidi_detach(alsa_midi_t *m)
stream_detach(self, PORT_INPUT);
stream_detach(self, PORT_OUTPUT);
snd_seq_queue_timer_free(self->timer);
snd_seq_close(self->seq);
self->seq = NULL;