From 7b3991f74b0e0dc6774453a59e674696560c2d93 Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Sat, 3 Feb 2018 00:40:20 +0100
Subject: [PATCH] added function to get music filename by music ID

- this does (still) not work correctly for negative music IDs
- negative music IDs are used for (game) music files not specified in a GIC
- handling negative music IDs will be fixed in the next commit
---
 src/game.c          |  4 ++--
 src/libgame/sound.c | 10 ++++++++++
 src/libgame/sound.h |  1 +
 src/tools.c         |  4 ++--
 4 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/game.c b/src/game.c
index ee6de4e8..a3ad6f14 100644
--- a/src/game.c
+++ b/src/game.c
@@ -14250,7 +14250,7 @@ static void FadeLevelMusic()
 {
   int music_nr = getLevelMusicNr();
   char *curr_music = getCurrentlyPlayingMusicFilename();
-  char *next_music = getMusicListEntry(music_nr)->filename;
+  char *next_music = getMusicInfoEntryFilename(music_nr);
 
   if (!strEqual(curr_music, next_music))
     FadeMusic();
@@ -14266,7 +14266,7 @@ static void PlayLevelMusic()
 {
   int music_nr = getLevelMusicNr();
   char *curr_music = getCurrentlyPlayingMusicFilename();
-  char *next_music = getMusicListEntry(music_nr)->filename;
+  char *next_music = getMusicInfoEntryFilename(music_nr);
 
   if (!strEqual(curr_music, next_music))
     PlayMusic(music_nr);
diff --git a/src/libgame/sound.c b/src/libgame/sound.c
index 8371b9b5..ea055503 100644
--- a/src/libgame/sound.c
+++ b/src/libgame/sound.c
@@ -725,6 +725,16 @@ static MusicInfo *getMusicInfoEntryFromMusicID(int pos)
   return mus_info[list_pos];
 }
 
+char *getMusicInfoEntryFilename(int pos)
+{
+  MusicInfo *mus_info = getMusicInfoEntryFromMusicID(pos);
+
+  if (mus_info == NULL)
+    return NULL;
+
+  return getBaseNamePtr(mus_info->source_filename);
+}
+
 char *getCurrentlyPlayingMusicFilename()
 {
   return currently_playing_music_filename;
diff --git a/src/libgame/sound.h b/src/libgame/sound.h
index 8eb344ef..9d496c3c 100644
--- a/src/libgame/sound.h
+++ b/src/libgame/sound.h
@@ -121,6 +121,7 @@ int getSoundListSize();
 int getMusicListSize();
 struct FileInfo *getSoundListEntry(int);
 struct FileInfo *getMusicListEntry(int);
+char *getMusicInfoEntryFilename(int);
 char *getCurrentlyPlayingMusicFilename();
 int getSoundListPropertyMappingSize();
 int getMusicListPropertyMappingSize();
diff --git a/src/tools.c b/src/tools.c
index 43df704a..1230cf0a 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -8498,7 +8498,7 @@ void PlayMenuMusicExt(int music)
 void PlayMenuMusic()
 {
   char *curr_music = getCurrentlyPlayingMusicFilename();
-  char *next_music = getMusicListEntry(menu.music[game_status])->filename;
+  char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
 
   if (!strEqual(curr_music, next_music))
     PlayMenuMusicExt(menu.music[game_status]);
@@ -8518,7 +8518,7 @@ static void FadeMenuSounds()
 static void FadeMenuMusic()
 {
   char *curr_music = getCurrentlyPlayingMusicFilename();
-  char *next_music = getMusicListEntry(menu.music[game_status])->filename;
+  char *next_music = getMusicInfoEntryFilename(menu.music[game_status]);
 
   if (!strEqual(curr_music, next_music))
     FadeMusic();
-- 
2.34.1