(svn r5464) [Behaviour Fix] : When starting the game, the system will now verify the presence of music files in gm forlder.

A song can now be removed from the programmed list (in custom list 1 and 2) by clicking on it.
Added music.c[ch] files, to make it all a bit cleaner.
Now, the name of the gm file is associated with the title of the song.

8 files changed, 113 insertions, 68 deletions

diff --git a/Makefile b/Makefile
index 40603f06f..6471b6ebd 100644
--- a/Makefile
+++ b/Makefile
@@ -671,6 +671,7 @@ SRCS += misc.c
 SRCS += misc_cmd.c
 SRCS += misc_gui.c
 SRCS += mixer.c
+SRCS += music.c
 SRCS += music_gui.c
 SRCS += namegen.c
 SRCS += network.c
diff --git a/lang/english.txt b/lang/english.txt
index 55ee294aa..ef823281a 100644
--- a/lang/english.txt
+++ b/lang/english.txt
@@ -551,6 +551,7 @@ STR_01F7_SELECT_CUSTOM_2_USER_DEFINED                           :{BLACK}Select '
 STR_01F8_CLEAR_CURRENT_PROGRAM_CUSTOM1                          :{BLACK}Clear current programme (Custom1 or Custom2 only)
 STR_01F9_SAVE_MUSIC_SETTINGS                                    :{BLACK}Save music settings
 STR_01FA_CLICK_ON_MUSIC_TRACK_TO                                :{BLACK}Click on music track to add to current programme (Custom1 or Custom2 only)
+STR_CLICK_ON_TRACK_TO_REMOVE                                    :{BLACK}Click on music track to remove it from current programme (Custom1 or Custom2 only)
 STR_01FB_TOGGLE_PROGRAM_SHUFFLE                                 :{BLACK}Toggle programme shuffle on/off
 STR_01FC_SHOW_MUSIC_TRACK_SELECTION                             :{BLACK}Show music track selection window
 STR_01FD_CLICK_ON_SERVICE_TO_CENTER                             :{BLACK}Click on service to centre view on industry/town
diff --git a/music.c b/music.c
new file mode 100644
index 000000000..80c6dfe51
--- /dev/null
+++ b/music.c
@@ -0,0 +1,28 @@
+/* $Id */
+
+#include "music.h"
+
+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'"},
+};
diff --git a/music.h b/music.h
new file mode 100644
index 000000000..5d968404a
--- /dev/null
+++ b/music.h
@@ -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
diff --git a/music_gui.c b/music_gui.c
index 3a9eb2e69..dee4a6896 100644
--- a/music_gui.c
+++ b/music_gui.c
@@ -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 +43,6 @@ static byte * const _playlists[] = {
 	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'
-};
-
-
 static void SkipToPrevSong(void)
 {
 	byte *b = _cur_playlist;
@@ -118,8 +91,8 @@ static void MusicVolumeChanged(byte new_vol)
 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 +104,19 @@ static void DoStopMusic(void)
 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 +147,15 @@ static void PlayPlaylistSong(void)
 {
 	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();
@@ -188,7 +178,7 @@ void MusicLoop(void)
 		PlayPlaylistSong();
 	}
 
-	if (_song_is_active == false) return;
+	if (!_song_is_active) return;
 
 	if (!_music_driver->is_song_playing()) {
 		if (_game_mode != GM_MENU) {
@@ -233,7 +223,7 @@ static void MusicTrackSelectionWndProc(Window *w, WindowEvent *e)
 		}
 
 		DrawStringCentered(216, 45+8*6+16, STR_01F0_CLEAR, 0);
-		DrawStringCentered(216, 45+8*6+16*2, STR_01F1_SAVE, 0);
+		//DrawStringCentered(216, 45+8*6+16*2, STR_01F1_SAVE, 0);
 
 		y = 23;
 		for (p = _playlists[msf.playlist], i = 0; (i = *p) != 0; p++) {
@@ -257,7 +247,7 @@ static void MusicTrackSelectionWndProc(Window *w, WindowEvent *e)
 			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;
@@ -266,17 +256,36 @@ static void MusicTrackSelectionWndProc(Window *w, WindowEvent *e)
 					break;
 				}
 			}
+		} break;
+
+		case 4: { /* remove from playlist */
+			int y = (e->click.pt.y - 23) / 6;
+			uint i;
+			byte *p;
 
+			if (msf.playlist < 4) return;
+			if (!IS_INT_INSIDE(y, 0, NUM_SONGS_AVAILABLE)) return;
+
+			p = _playlists[msf.playlist];
+			for (i = y; i != NUM_SONGS_PLAYLIST - 1; i++) {
+				p[i] = p[i + 1];
+				}
+
+			SetWindowDirty(w);
+			SelectSongToPlay();
 		} break;
+
 		case 11: /* clear */
 			_playlists[msf.playlist][0] = 0;
 			SetWindowDirty(w);
 			StopMusic();
 			SelectSongToPlay();
 			break;
-		case 12: /* save */
-			ShowInfo("MusicTrackSelectionWndProc:save not implemented\n");
-			break;
+
+		//case 12: /* save */
+		//	ShowInfo("MusicTrackSelectionWndProc:save not implemented\n");
+		//	break;
+
 		case 5: case 6: case 7: case 8: case 9: case 10: /* set playlist */
 			msf.playlist = e->click.widget - 5;
 			SetWindowDirty(w);
@@ -294,7 +303,7 @@ static const Widget _music_track_selection_widgets[] = {
 {    WWT_CAPTION,   RESIZE_NONE,    14,    11,   431,     0,    13, STR_01EB_MUSIC_PROGRAM_SELECTION, STR_018C_WINDOW_TITLE_DRAG_THIS},
 {     WWT_IMGBTN,   RESIZE_NONE,    14,     0,   431,    14,   217, 0x0,			STR_NULL},
 {     WWT_IMGBTN,   RESIZE_NONE,    14,     2,   181,    22,   215, 0x0,			STR_01FA_CLICK_ON_MUSIC_TRACK_TO},
-{     WWT_IMGBTN,   RESIZE_NONE,    14,   250,   429,    22,   215, 0x0,			STR_01F2_CURRENT_PROGRAM_OF_MUSIC},
+{     WWT_IMGBTN,   RESIZE_NONE,    14,   250,   429,    22,   215, 0x0,			STR_CLICK_ON_TRACK_TO_REMOVE},
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,    44,    51, 0x0,			STR_01F3_SELECT_ALL_TRACKS_PROGRAM},
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,    52,    59, 0x0,			STR_01F4_SELECT_OLD_STYLE_MUSIC},
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,    60,    67, 0x0,			STR_01F5_SELECT_NEW_STYLE_MUSIC},
@@ -302,7 +311,7 @@ static const Widget _music_track_selection_widgets[] = {
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,    76,    83, 0x0,			STR_01F6_SELECT_CUSTOM_1_USER_DEFINED},
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,    84,    91, 0x0,			STR_01F7_SELECT_CUSTOM_2_USER_DEFINED},
 { WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,   108,   115, 0x0,			STR_01F8_CLEAR_CURRENT_PROGRAM_CUSTOM1},
-{ WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,   124,   131, 0x0,			STR_01F9_SAVE_MUSIC_SETTINGS},
+//{ WWT_PUSHIMGBTN,   RESIZE_NONE,    14,   186,   245,   124,   131, 0x0,			STR_01F9_SAVE_MUSIC_SETTINGS},
 {   WIDGETS_END},
 };
 
@@ -339,7 +348,7 @@ static void MusicWindowWndProc(Window *w, WindowEvent *e)
 					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);
diff --git a/openttd.vcproj b/openttd.vcproj
index 37afbc289..fae8e0b59 100644
--- a/openttd.vcproj
+++ b/openttd.vcproj
@@ -253,6 +253,9 @@
 				RelativePath=".\mixer.c">
 			</File>
 			<File
+				RelativePath=".\music.c">
+			</File>
+			<File
 				RelativePath=".\namegen.c">
 			</File>
 			<File
@@ -479,6 +482,9 @@
 				RelativePath=".\mixer.h">
 			</File>
 			<File
+				RelativePath=".\music.h">
+			</File>
+			<File
 				RelativePath=".\network.h">
 			</File>
 			<File
diff --git a/openttd_vs80.vcproj b/openttd_vs80.vcproj
index 5384f1052..091fe29b0 100644
--- a/openttd_vs80.vcproj
+++ b/openttd_vs80.vcproj
@@ -346,6 +346,10 @@
 				>

 			</File>

 			<File

+				RelativePath=".\music.c"

+				>

+			</File>

+			<File

 				RelativePath=".\namegen.c"

 				>

 			</File>

@@ -655,6 +659,10 @@
 				>

 			</File>

 			<File

+				RelativePath=".\music.h"

+				>

+			</File>

+			<File

 				RelativePath=".\network.h"

 				>

 			</File>

diff --git a/strings.c b/strings.c
index 84439828d..2e976f4ad 100644
--- a/strings.c
+++ b/strings.c
@@ -18,6 +18,7 @@
 #include "variables.h"
 #include "newgrf_text.h"
 #include "table/landscape_const.h"
+#include "music.h"
 
 char _userstring[128];
 
@@ -1015,31 +1016,6 @@ static char *GenPresidentName(char *buff, uint32 x)
 	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) {
@@ -1053,7 +1029,7 @@ static char *GetSpecialPlayerNameString(char *buff, int ind, const int32 *argv)
 			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?