midi-dump: exit cleanly, add support for absolute+relative timestamps

Signed-off-by: Robin Gareus <robin@gareus.org>

example-clients/midi_dump.c

@@ -1,11 +1,22 @@
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 #include <assert.h>
 #include <jack/jack.h>
 #include <jack/midiport.h>
 
+#ifndef WIN32
+#include <signal.h>
+#endif
+
 static jack_port_t* port;
 
+static int keeprunning = 1;
+static int time_format = 0;
+
+static uint64_t monotonic_cnt = 0;
+static uint64_t prev_event = 0;
+
 static void
 describe (jack_midi_event_t* event, char* buffer, size_t buflen)
 {
@@ -58,7 +69,17 @@ process (jack_nframes_t frames, void* arg)
 		if (r == 0) {
 			size_t j;
 
-			printf ("%d:", event.time);
+			switch(time_format) {
+				case 1:
+					printf ("%7"PRId64":", event.time + monotonic_cnt);
+					break;
+				case 2:
+					printf ("%+6"PRId64":", event.time + monotonic_cnt - prev_event);
+					break;
+				default:
+					printf ("%4d:", event.time);
+					break;
+			}
 			for (j = 0; j < event.size; ++j) {
 				printf (" %x", event.buffer[j]);
 			}
@@ -67,12 +88,18 @@ process (jack_nframes_t frames, void* arg)
 			printf (" %s", description);
 
 			printf ("\n");
+			prev_event = event.time + monotonic_cnt;
 		}
 	}
 
+	monotonic_cnt += frames;
+
 	return 0;
 }
 
+static void wearedone(int sig) {
+	keeprunning = 0;
+}
 
 int
 main (int argc, char* argv[])
@@ -82,8 +109,15 @@ main (int argc, char* argv[])
 	char const * client_name;
 	int r;
 
-	if (argc == 2) {
-		client_name = argv[1];
+	int cn = 1;
+
+	if (argc > 1) {
+		if (!strcmp(argv[1], "-a")) { time_format = 1; cn = 2; }
+		if (!strcmp(argv[1], "-r")) { time_format = 2; cn = 2; }
+	}
+
+	if (argc > cn) {
+		client_name = argv[cn];
 	} else {
 		client_name = default_name;
 	}
@@ -108,8 +142,13 @@ main (int argc, char* argv[])
 		exit (EXIT_FAILURE);
 	}
 
+#ifndef WIN32
+	signal(SIGHUP, wearedone);
+	signal(SIGINT, wearedone);
+#endif
+
 	/* run until interrupted */
-	while (1) {
+	while (keeprunning) {
 	#ifdef WIN32
 		Sleep(1000);
 	#else
@@ -117,5 +156,8 @@ main (int argc, char* argv[])
 	#endif
 	};
 
+	jack_deactivate (client);
+	jack_client_close (client);
+
 	return 0;
 }