able to know when clients are un/registered

1 files changed, 43 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..a821ef3
--- /dev/null
+++ b/main.c
@@ -0,0 +1,43 @@
+#include <jack/jack.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+registration_cb(jack_port_id_t port_id, int is_registered, void *arg)
+{
+        jack_client_t *client = (jack_client_t *)arg;
+        jack_port_t *port = jack_port_by_id(client, port_id);
+        const char *port_name = jack_port_name(port);
+
+        if (is_registered) {
+                printf("%s registered\n", port_name);
+        } else {
+                printf("%s unregistered\n", port_name);
+        }
+}
+
+int
+main(void)
+{
+        jack_client_t *client;
+
+        client = jack_client_open("jack_connectd", JackNullOption, NULL);
+        if (client == NULL) {
+                fprintf(stderr, "Failed to connect to JACK server.\n");
+                return 1;
+        }
+
+        /* client is passed as arg so it can be used within cb */
+        jack_set_port_registration_callback(client, registration_cb, client);
+
+        /* start processing callbacks */
+        if (jack_activate(client) != 0) {
+                fprintf(stderr, "Failed to activate JACK client.\n");
+                return 1;
+        }
+
+        /* do nothing else while waiting */
+        for (;;);
+
+        return 0;
+}