Add a debugging option for MIDI input (-dm).

example.midizaprc

@@ -110,8 +110,15 @@
 
 #DEBUG_KEYS
 
+# Finally, the following option prints all MIDI input (with the input port
+# number in the first, and the actual data value in the last column). This is
+# useful as a simple MIDI monitor, especially if you want to figure out which
+# tokens to use in your translations.
+
+#DEBUG_MIDI
+
 # NOTE: The debugging options can also be specified on the command line
-# using -d in conjunction with any of the letters r, s and k (or the
+# using -d in conjunction with any of the letters r, s, k and m (or the
 # letter j if you also want debugging output from Jack).  Just -d
 # without any option letter turns on all debugging options.
 

midizap.c

@@ -251,6 +251,21 @@ static char *debug_key(translation *tr, char *name,
   return name;
 }
 
+static void debug_input(translation *tr, int portno,
+			int status, int chan, int data, int data2)
+{
+  char name[100];
+  if (status == 0xe0)
+    // translate LSB,MSB to a pitch bend value in the range -8192..8191
+    data2 = ((data2 << 7) | data) - 8192;
+  if (status == 0xc0)
+    printf("[%d] %s\n", portno,
+	   debug_key(tr, name, status, chan, data, 0));
+  else
+    printf("[%d] %s value = %d\n", portno,
+	   debug_key(tr, name, status, chan, data, 0), data2);
+}
+
 void
 send_strokes(translation *tr, uint8_t portno, int status, int chan, int data,
 	     int index, int dir)
@@ -486,6 +501,7 @@ handle_event(uint8_t *msg, uint8_t portno)
     msg[0] = status | chan;
     msg[2] = 0;
   }
+  if (debug_midi) debug_input(tr, portno, status, chan, msg[1], msg[2]);
   switch (status) {
   case 0xc0:
     send_strokes(tr, portno, status, chan, msg[1], 0, 0);
@@ -647,6 +663,9 @@ main(int argc, char **argv)
 	  case 'k':
 	    default_debug_keys = 1;
 	    break;
+	  case 'm':
+	    default_debug_midi = 1;
+	    break;
 	  case 'j':
 	    debug_jack = 1;
 	    break;
@@ -658,7 +677,8 @@ main(int argc, char **argv)
 	  ++a;
 	}
       } else {
-	default_debug_regex = default_debug_strokes = default_debug_keys = 1;
+	default_debug_regex = default_debug_strokes = default_debug_keys =
+	  default_debug_midi = 1;
 	debug_jack = 1;
       }
       break;

midizap.h

@@ -89,8 +89,9 @@ extern int read_config_file(void);
 extern translation *get_translation(char *win_title, char *win_class);
 extern void print_stroke_sequence(char *name, char *up_or_down, stroke *s);
 extern translation *default_translation, *default_midi_translation[2];
-extern int debug_regex, debug_strokes, debug_keys;
-extern int default_debug_regex, default_debug_strokes, default_debug_keys;
+extern int debug_regex, debug_strokes, debug_keys, debug_midi;
+extern int default_debug_regex, default_debug_strokes, default_debug_keys,
+  default_debug_midi;
 extern char *config_file_name;
 extern int enable_jack_output;
 extern int midi_octave;

readconfig.c

@@ -190,10 +190,12 @@
 int default_debug_regex = 0;
 int default_debug_strokes = 0;
 int default_debug_keys = 0;
+int default_debug_midi = 0;
 
 int debug_regex = 0;
 int debug_strokes = 0;
 int debug_keys = 0;
+int debug_midi = 0;
 
 int midi_octave = 0;
 
@@ -1130,7 +1132,8 @@ read_config_file(void)
   }
   if (buf.st_mtime > config_file_modification_time) {
     config_file_modification_time = buf.st_mtime;
-    if (default_debug_regex || default_debug_strokes || default_debug_keys) {
+    if (default_debug_regex || default_debug_strokes || default_debug_keys ||
+	default_debug_midi) {
       printf("Loading configuration: %s\n", config_file_name);
     }
 
@@ -1148,6 +1151,7 @@ read_config_file(void)
     debug_regex = default_debug_regex;
     debug_strokes = default_debug_strokes;
     debug_keys = default_debug_keys;
+    debug_midi = default_debug_midi;
     midi_octave = 0;
 
     while ((line=read_line(f, config_file_name)) != NULL) {
@@ -1203,6 +1207,10 @@ read_config_file(void)
 	debug_keys = 1;
 	continue;
       }
+      if (!strcmp(tok, "DEBUG_MIDI")) {
+	debug_midi = 1;
+	continue;
+      }
       if (!strncmp(tok, "MIDI_OCTAVE", 11)) {
 	char *a = tok+11;
 	int k, n;