--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/music.h	Mon Jul 31 11:50:23 2006 +0000
@@ -0,0 +1,16 @@
+/* $Id */
+
+#ifndef MUSIC_H
+#define MUSIC_H
+
+#define NUM_SONGS_PLAYLIST 33
+#define NUM_SONGS_AVAILABLE 22
+
+typedef struct SongSpecs {
+	char filename[256];
+	char song_name[64];
+} SongSpecs;
+
+extern const SongSpecs origin_songs_specs[NUM_SONGS_AVAILABLE];
+
+#endif //MUSIC_H

--- a/music_gui.c	Mon Jul 31 11:29:18 2006 +0000
+++ b/music_gui.c	Mon Jul 31 11:50:23 2006 +0000
@@ -10,12 +10,12 @@
 #include "hal.h"
 #include "macros.h"
 #include "variables.h"
+#include "music.h"
 
 static byte _music_wnd_cursong;
 static bool _song_is_active;
-static byte _cur_playlist[33];
+static byte _cur_playlist[NUM_SONGS_PLAYLIST];
 
-#define NUM_SONGS_AVAILABLE 22
 
 
 static byte _playlist_all[] = {
@@ -43,33 +43,31 @@
 	msf.custom_2,
 };
 
-// Map the order of the song names to the numbers of the midi filenames
-static const byte midi_idx[] = {
-	 0, // Tycoon DELUXE Theme
-	 2, // Easy Driver
-	 3, // Little Red Diesel
-	17, // Cruise Control
-	 7, // Don't Walk!
-	 9, // Fell Apart On Me
-	 4, // City Groove
-	19, // Funk Central
-	 6, // Stoke It
-	12, // Road Hog
-	 5, // Aliens Ate My Railway
-	 1, // Snarl Up
-	18, // Stroll On
-	10, // Can't Get There From Here
-	 8, // Sawyer's Tune
-	13, // Hold That Train!
-	21, // Movin' On
-	15, // Goss Groove
-	16, // Small Town
-	14, // Broomer's Oil Rag
-	20, // Jammit
-	11  // Hard Drivin'
+const SongSpecs origin_songs_specs[NUM_SONGS_AVAILABLE] = {
+	{"gm_tt00.gm", "Tycoon DELUXE Theme"},
+	{"gm_tt02.gm", "Easy Driver"},
+	{"gm_tt03.gm", "Little Red Diesel"},
+	{"gm_tt17.gm", "Cruise Control"},
+	{"gm_tt07.gm", "Don't Walk!"},
+	{"gm_tt09.gm", "Fell Apart On Me"},
+	{"gm_tt04.gm", "City Groove"},
+	{"gm_tt19.gm", "Funk Central"},
+	{"gm_tt06.gm", "Stoke It"},
+	{"gm_tt12.gm", "Road Hog"},
+	{"gm_tt05.gm", "Aliens Ate My Railway"},
+	{"gm_tt01.gm", "Snarl Up"},
+	{"gm_tt18.gm", "Stroll On"},
+	{"gm_tt10.gm", "Can't Get There From Here"},
+	{"gm_tt08.gm", "Sawyer's Tune"},
+	{"gm_tt13.gm", "Hold That Train!"},
+	{"gm_tt21.gm", "Movin' On"},
+	{"gm_tt15.gm", "Goss Groove"},
+	{"gm_tt16.gm", "Small Town"},
+	{"gm_tt14.gm", "Broomer's Oil Rag"},
+	{"gm_tt20.gm", "Jammit"},
+	{"gm_tt11.gm", "Hard Drivin'"},
 };
 
-
 static void SkipToPrevSong(void)
 {
 	byte *b = _cur_playlist;
@@ -118,8 +116,8 @@
 static void DoPlaySong(void)
 {
 	char filename[256];
-	snprintf(filename, sizeof(filename), "%sgm_tt%.2d.gm",
-		_path.gm_dir, midi_idx[_music_wnd_cursong - 1]);
+	snprintf(filename, sizeof(filename), "%s%s",
+		_path.gm_dir, origin_songs_specs[_music_wnd_cursong - 1].filename);
 	_music_driver->play_song(filename);
 }
 
@@ -131,10 +129,19 @@
 static void SelectSongToPlay(void)
 {
 	uint i = 0;
+	uint j = 0;
+	char filename[256];
 
 	memset(_cur_playlist, 0, sizeof(_cur_playlist));
 	do {
-		_cur_playlist[i] = _playlists[msf.playlist][i];
+		snprintf(filename, sizeof(filename),  "%s%s",
+		_path.gm_dir, origin_songs_specs[_playlists[msf.playlist][i]].filename);
+		//we are now checking for the existence of that file prior
+		//to add it to the list of available songs
+		if (FileExists(filename)) {
+			_cur_playlist[j] = _playlists[msf.playlist][i];
+			j++;
+		}
 	} while (_playlists[msf.playlist][i++] != 0 && i < lengthof(_cur_playlist) - 1);
 
 	if (msf.shuffle) {
@@ -165,7 +172,15 @@
 {
 	if (_cur_playlist[0] == 0) {
 		SelectSongToPlay();
-		if (_cur_playlist[0] == 0) return;
+		//if there is not songs in the playlist, it may indicate
+		//no file on the gm folder, or even no gm folder.
+		//Stop the playback, then
+		if (_cur_playlist[0] == 0) {
+			_song_is_active = false;
+			_music_wnd_cursong = 0;
+			msf.playing = false;
+			return;
+		}
 	}
 	_music_wnd_cursong = _cur_playlist[0];
 	DoPlaySong();
@@ -182,13 +197,13 @@
 
 void MusicLoop(void)
 {
-	if (!msf.btn_down && _song_is_active) {
+	if (!msf.playing && _song_is_active) {
 		StopMusic();
-	} else if (msf.btn_down && !_song_is_active) {
+	} else if (msf.playing && !_song_is_active) {
 		PlayPlaylistSong();
 	}
 
-	if (_song_is_active == false) return;
+	if (!_song_is_active) return;
 
 	if (!_music_driver->is_song_playing()) {
 		if (_game_mode != GM_MENU) {
@@ -257,7 +272,7 @@
 			if (!IS_INT_INSIDE(y, 0, NUM_SONGS_AVAILABLE)) return;
 
 			p = _playlists[msf.playlist];
-			for (i = 0; i != 32; i++) {
+			for (i = 0; i != NUM_SONGS_PLAYLIST - 1; i++) {
 				if (p[i] == 0) {
 					p[i] = y + 1;
 					p[i + 1] = 0;
@@ -339,7 +354,7 @@
 					color = 0xB8;
 				}
 			}
-			GfxFillRect(187, 33 - i * 2, 200, 33 - i * 2, color);
+			GfxFillRect(187, NUM_SONGS_PLAYLIST - i * 2, 200, NUM_SONGS_PLAYLIST - i * 2, color);
 		}
 
 		GfxFillRect(60, 46, 239, 52, 0);
@@ -405,10 +420,10 @@
 			SkipToNextSong();
 			break;
 		case 4: // stop playing
-			msf.btn_down = false;
+			msf.playing = false;
 			break;
 		case 5: // start playing
-			msf.btn_down = true;
+			msf.playing = true;
 			break;
 		case 6:{ // volume sliders
 			byte *vol,new_vol;

--- a/settings.c	Mon Jul 31 11:29:18 2006 +0000
+++ b/settings.c	Mon Jul 31 11:50:23 2006 +0000
@@ -742,7 +742,7 @@
 	{"effect_vol",SDT_UINT8,	(void*)128,		&msf.effect_vol, NULL},
 	{"custom_1",	SDT_INTLIST | SDT_UINT8 | lengthof(msf.custom_1) << 16, NULL, &msf.custom_1, NULL},
 	{"custom_2",	SDT_INTLIST | SDT_UINT8 | lengthof(msf.custom_2) << 16, NULL, &msf.custom_2, NULL},
-	{"playing",		SDT_BOOL,		(void*)true,	&msf.btn_down, NULL},
+	{"playing",		SDT_BOOL,		(void*)true,	&msf.playing, NULL},
 	{"shuffle",		SDT_BOOL,		(void*)false, &msf.shuffle, NULL},
 	{"extmidi",   SDT_STRINGBUF | (lengthof(msf.extmidi)<<16), EXTERNAL_PLAYER, &msf.extmidi, NULL},
 	{NULL,				0,					NULL,					NULL,																NULL}

--- a/sound.h	Mon Jul 31 11:29:18 2006 +0000
+++ b/sound.h	Mon Jul 31 11:50:23 2006 +0000
@@ -9,7 +9,7 @@
 	byte effect_vol;
 	byte custom_1[33];
 	byte custom_2[33];
-	bool btn_down;
+	bool playing;
 	bool shuffle;
 	char extmidi[80];
 } MusicFileSettings;

--- a/strings.c	Mon Jul 31 11:29:18 2006 +0000
+++ b/strings.c	Mon Jul 31 11:50:23 2006 +0000
@@ -16,6 +16,7 @@
 #include "waypoint.h"
 #include "industry.h"
 #include "variables.h"
+#include "music.h"
 
 char _userstring[128];
 
@@ -899,31 +900,6 @@
 	return buff;
 }
 
-static const char * const _song_names[] = {
-	"Tycoon DELUXE Theme",
-	"Easy Driver",
-	"Little Red Diesel",
-	"Cruise Control",
-	"Don't Walk!",
-	"Fell Apart On Me",
-	"City Groove",
-	"Funk Central",
-	"Stoke It",
-	"Road Hog",
-	"Aliens Ate My Railway",
-	"Snarl Up",
-	"Stroll On",
-	"Can't Get There From Here",
-	"Sawyer's Tune",
-	"Hold That Train!",
-	"Movin' On",
-	"Goss Groove",
-	"Small Town",
-	"Broomer's Oil Rag",
-	"Jammit",
-	"Hard Drivin'"
-};
-
 static char *GetSpecialPlayerNameString(char *buff, int ind, const int32 *argv)
 {
 	switch (ind) {
@@ -937,7 +913,7 @@
 			return GenPresidentName(buff, GetInt32(&argv));
 
 		case 4: // song names
-			return strecpy(buff, _song_names[GetInt32(&argv) - 1], NULL);
+			return strecpy(buff, origin_songs_specs[GetInt32(&argv) - 1].song_name, NULL);
 	}
 
 	// town name?