Enhanced timing accuracy for real-time timestamps.

diff --git a/test/playmidi1.c b/test/playmidi1.c
index ee2f3b44bd15b7516db8d712022dda9b7a60e077..73478098b9691f0f139df46779cf72d388418fb1 100644 (file)
--- a/test/playmidi1.c
+++ b/test/playmidi1.c
@@ -73,6 +73,7 @@ static int source_channel = 0;
 static int source_port = 0;
 
 static int verbose = 0;
+static int slave   = 0;        
 
 #define VERB_INFO      1
 #define VERB_MUCH      2
@@ -188,14 +189,16 @@ static void do_header(int format, int ntracks, int division)
                tempo.ppq = ppq;
                if (snd_seq_set_queue_tempo(seq_handle, dest_queue, &tempo) < 0) {
                        perror("set_queue_tempo");
-                       exit(1);
+                       if (!slave)
+                               exit(1);
                }
                if (verbose >= VERB_INFO)
                        printf("ALSA Timer updated, PPQ = %d\n", tempo.ppq);
        }
 
        /* start playing... */
-       alsa_start_timer();
+       if (!slave)
+               alsa_start_timer();
 }
 
 /* fill normal event header */
@@ -475,6 +478,8 @@ static void usage(void)
        fprintf(stderr, "  -v: verbose mode\n");
        fprintf(stderr, "  -a queue:client:port : set destination address (default=%d:%d:%d)\n",
                DEST_QUEUE_NUMBER, DEST_CLIENT_NUMBER, DEST_PORT_NUMBER);
+       fprintf(stderr, "  -s: slave mode (allow external clock synchronisation)\n");
+               
 }
 
 /* parse destination address (-a option) */
@@ -500,7 +505,7 @@ int main(int argc, char *argv[])
        int tmp;
        int c;
 
-       while ((c = getopt(argc, argv, "a:v")) != -1) {
+       while ((c = getopt(argc, argv, "sa:v")) != -1) {
                switch (c) {
                case 'v':
                        verbose++;
@@ -508,6 +513,9 @@ int main(int argc, char *argv[])
                case 'a':
                        parse_address(optarg, &dest_queue, &dest_client, &dest_port);
                        break;
+               case 's':
+                       slave = 1;
+                       break;
                default:
                        usage();
                        exit(1);