add a help option. not that helpful but tells you what port it's list…

…ening on

config.h

@@ -1,3 +1,8 @@
+#ifndef _DIRTCONFIGH_
+#define _DIRTCONFIGH_
 
 //#define FEEDBACK
 //#define INPUT
+#define OSC_PORT "7771"
+
+#endif

dirt.c

@@ -1,16 +1,29 @@
 #include <stdio.h>
-
 #include <unistd.h>
+#include <string.h>
 
 #include "jack.h"
 #include "audio.h"
 #include "server.h"
 
 int main (int argc, char **argv) {
-  printf("init audio\n");
+  if (argc > 1 && strncmp(argv[1], "-h", 2) == 0) {
+      printf("Dirt - a software sampler, which listens for\n"
+             "OpenSoundControl messages on port %s.\n"
+             "Mainly used with Tidal http://yaxu.org/tidal/\n"
+             "Released as free software under the terms of the\n"
+             "GNU Public License version 3.0 and later.\n",
+             OSC_PORT
+             );
+      return(0);
+  }
+
+  fprintf(stderr, "init audio\n");
   audio_init();
-  printf("init osc\n");
+
+  fprintf(stderr, "init open sound control\n");
   server_init();
+
   sleep(-1);
   return(0);
 }

server.c

@@ -10,6 +10,7 @@
 
 #include "server.h"
 #include "audio.h"
+#include "config.h"
 
 #ifdef ZEROMQ
 #include <zmq.h>
@@ -87,6 +88,9 @@ int play_handler(const char *path, const char *types, lo_arg **argv,
   /* lo_timetag ts = lo_message_get_timestamp(data); */
 
   double when = (double) argv[0]->i + ((double) argv[1]->i / 1000000.0);
+#ifdef SUBLATENCY
+  when -= SUBLATENCY;
+#endif
   char *sample_name = strdup((char *) argv[2]);
 
   float offset = argv[3]->f;
@@ -176,7 +180,7 @@ void *zmqthread(void *data){
 
 extern int server_init(void) {
 
-  lo_server_thread st = lo_server_thread_new("7771", error);
+  lo_server_thread st = lo_server_thread_new(OSC_PORT, error);
   lo_server_thread_add_method(st, "/play", "iisffffffsffffi",
                               play_handler, 
                               NULL