Rework pretty-name metadata.

The rawmidi and seqmidi pretty-name metadata now uses the same Jack1
port name as the 1st alias, without the alsa_midi: prefix.

linux/alsa/alsa_rawmidi.c

@@ -441,6 +441,7 @@ inline int midi_port_open_jack(alsa_rawmidi_t *midi, midi_port_t *port, int type
 		type | JackPortIsPhysical | JackPortIsTerminal, 0);
 
 	// Like in alsa_seqmidi.c, use the Jack1 port name as alias. -ag
+	const char *prefix = "alsa_midi:";
 	const char* device_name = port->device_name;
 	const char* port_name = port->subdev_name;
 	const char *type_name = (type & JackPortIsOutput) ? "out" : "in";
@@ -448,13 +449,15 @@ inline int midi_port_open_jack(alsa_rawmidi_t *midi, midi_port_t *port, int type
 	  /* entire client name is part of the port name so don't replicate it */
 	  snprintf (name,
 		    sizeof(name),
-		    "alsa_midi:%s (%s)",
+		    "%s%s (%s)",
+		    prefix,
 		    port_name,
 		    type_name);
 	} else {
 	  snprintf (name,
 		    sizeof(name),
-		    "alsa_midi:%s %s (%s)",
+		    "%s%s %s (%s)",
+		    prefix,
 		    device_name,
 		    port_name,
 		    type_name);
@@ -472,7 +475,8 @@ inline int midi_port_open_jack(alsa_rawmidi_t *midi, midi_port_t *port, int type
 		// we just ignore the given alias argument, and use the Jack1
 		// port name from above instead -ag
 		jack_port_set_alias(port->jack, name);
-		jack_port_set_default_metadata(port->jack, port->device_name);
+		// Pretty-name metadata is the same as alias without the prefix.
+		jack_port_set_default_metadata (port->jack, name+strlen(prefix));
 	}
 
 	return port->jack == NULL;

linux/alsa/alsa_seqmidi.c

@@ -512,6 +512,7 @@ port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const s
 		goto failed;
 
 	// First alias: Jack1-compatible port name. -ag
+	const char *prefix = "alsa_midi:";
 	const char *device_name = snd_seq_client_info_get_name(client_info);
 	const char* port_name = snd_seq_port_info_get_name (info);
 	const char* type_name = jack_caps & JackPortIsOutput ? "out" : "in";
@@ -520,13 +521,15 @@ port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const s
 	  /* entire client name is part of the port name so don't replicate it */
 	  snprintf (port->name,
 		    sizeof(port->name),
-		    "alsa_midi:%s (%s)",
+		    "%s%s (%s)",
+		    prefix,
 		    port_name,
 		    type_name);
 	} else {
 	  snprintf (port->name,
 		    sizeof(port->name),
-		    "alsa_midi:%s %s (%s)",
+		    "%s%s %s (%s)",
+		    prefix,
 		    device_name,
 		    port_name,
 		    type_name);
@@ -540,7 +543,8 @@ port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const s
 	}
 
 	jack_port_set_alias (port->jack_port, port->name);
-	jack_port_set_default_metadata (port->jack_port, device_name);
+	// Pretty-name metadata is the same as first alias without the prefix.
+	jack_port_set_default_metadata (port->jack_port, port->name+strlen(prefix));
 
 	// Second alias: Strip the alsa_midi prefix, so that devices appear
 	// under their ALSA names. Use the ALSA port names (without device
@@ -562,7 +566,6 @@ port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const s
 	}
 
 	jack_port_set_alias (port->jack_port, port->name);
-	jack_port_set_default_metadata (port->jack_port, device_name);
 
 	if (type == PORT_INPUT)
 		err = alsa_connect_from(self, port->remote.client, port->remote.port);