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Enhanced timing accuracy for real-time timestamps.

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This commit is contained in:
Frank van de Pol 1999-08-06 19:31:15 +00:00
parent b998850dc2
commit 9218e21adb
1 changed files with 11 additions and 3 deletions
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14
test/playmidi1.c
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@ -73,6 +73,7 @@ static int source_channel = 0;
static int source_port = 0; static int source_port = 0;
static int verbose = 0; static int verbose = 0;
static int slave = 0;
#define VERB_INFO 1 #define VERB_INFO 1
#define VERB_MUCH 2 #define VERB_MUCH 2
@ -188,14 +189,16 @@ static void do_header(int format, int ntracks, int division)
tempo.ppq = ppq; tempo.ppq = ppq;
if (snd_seq_set_queue_tempo(seq_handle, dest_queue, &tempo) < 0) { if (snd_seq_set_queue_tempo(seq_handle, dest_queue, &tempo) < 0) {
perror("set_queue_tempo"); perror("set_queue_tempo");
exit(1); if (!slave)
exit(1);
} }
if (verbose >= VERB_INFO) if (verbose >= VERB_INFO)
printf("ALSA Timer updated, PPQ = %d\n", tempo.ppq); printf("ALSA Timer updated, PPQ = %d\n", tempo.ppq);
} }
/* start playing... */ /* start playing... */
alsa_start_timer(); if (!slave)
alsa_start_timer();
} }
/* fill normal event header */ /* fill normal event header */
@ -475,6 +478,8 @@ static void usage(void)
fprintf(stderr, " -v: verbose mode\n"); fprintf(stderr, " -v: verbose mode\n");
fprintf(stderr, " -a queue:client:port : set destination address (default=%d:%d:%d)\n", fprintf(stderr, " -a queue:client:port : set destination address (default=%d:%d:%d)\n",
DEST_QUEUE_NUMBER, DEST_CLIENT_NUMBER, DEST_PORT_NUMBER); DEST_QUEUE_NUMBER, DEST_CLIENT_NUMBER, DEST_PORT_NUMBER);
fprintf(stderr, " -s: slave mode (allow external clock synchronisation)\n");
} }
/* parse destination address (-a option) */ /* parse destination address (-a option) */
@ -500,7 +505,7 @@ int main(int argc, char *argv[])
int tmp; int tmp;
int c; int c;
while ((c = getopt(argc, argv, "a:v")) != -1) { while ((c = getopt(argc, argv, "sa:v")) != -1) {
switch (c) { switch (c) {
case 'v': case 'v':
verbose++; verbose++;
@ -508,6 +513,9 @@ int main(int argc, char *argv[])
case 'a': case 'a':
parse_address(optarg, &dest_queue, &dest_client, &dest_port); parse_address(optarg, &dest_queue, &dest_client, &dest_port);
break; break;
case 's':
slave = 1;
break;
default: default:
usage(); usage();
exit(1); exit(1);