Further changes to musicdef based on discussion with Gunla

- Add "author" and "originalcomposers" fields
    - "author" is for remixes and original compositions, can be ommitted
    - "originalcomposers" will not be visible mid-game, but will be visible in music test. Stores original sound team info
- Store all strings as Zone memory instead of static arrays, since not every field will be relevant for every track

src/s_sound.c

@@ -1476,14 +1476,32 @@ ReadMusicDefFields
 
 			textline = value;
 
-			/* based ignored lumps */
-			if (!stricmp(stoken, "title")) {
-				STRBUFCPY(def->title, textline);
-			} else if (!stricmp(stoken, "source")) {
-				STRBUFCPY(def->source, textline);
-			} else if (!stricmp(stoken, "volume")) {
+			if (!stricmp(stoken, "title"))
+			{
+				Z_Free(def->title);
+				def->title = Z_StrDup(textline);
+			}
+			else if (!stricmp(stoken, "author"))
+			{
+				Z_Free(def->author);
+				def->author = Z_StrDup(textline);
+			}
+			else if (!stricmp(stoken, "source"))
+			{
+				Z_Free(def->source);
+				def->source = Z_StrDup(textline);
+			}
+			else if (!stricmp(stoken, "originalcomposers"))
+			{
+				Z_Free(def->composers);
+				def->composers = Z_StrDup(textline);
+			}
+			else if (!stricmp(stoken, "volume"))
+			{
 				def->volume = atoi(textline);
-			} else {
+			}
+			else
+			{
 				MusicDefError(CONS_WARNING,
 						"Unknown field '%s'.",
 						stoken, lumpnum, line);
@@ -1606,9 +1624,46 @@ void S_ShowMusicCredit(void)
 	{
 		if (!stricmp(def->name, music_name))
 		{
+			char credittext[128] = "";
+			char *work = NULL;
+			size_t len = 128, worklen;
+
+			if (!def->title)
+			{
+				return;
+			}
+
+			work = va("\x1F %s", def->title);
+			worklen = strlen(work);
+			if (worklen <= len)
+			{
+				strncat(credittext, work, len);
+				len -= worklen;
+
+#define MUSICCREDITAPPEND(field)\
+				if (field)\
+				{\
+					work = va(" - %s", field);\
+					worklen = strlen(work);\
+					if (worklen <= len)\
+					{\
+						strncat(credittext, work, len);\
+						len -= worklen;\
+					}\
+				}
+
+				MUSICCREDITAPPEND(def->author);
+				MUSICCREDITAPPEND(def->source);
+
+#undef MUSICCREDITAPPEND
+			}
+
+			if (credittext[0] == '\0')
+				return;
+
 			cursongcredit.def = def;
 			Z_Free(cursongcredit.text);
-			cursongcredit.text = Z_StrDup(va("\x1F"" %s - %s", def->title, def->source));
+			cursongcredit.text = Z_StrDup(credittext);
 			cursongcredit.anim = 5*TICRATE;
 			cursongcredit.x = cursongcredit.old_x = 0;
 			cursongcredit.trans = NUMTRANSMAPS;

src/s_sound.h

@@ -173,8 +173,10 @@ boolean S_SpeedMusic(float speed);
 struct musicdef_t
 {
 	char name[7];
-	char title[256];
-	char source[256];
+	char *title;
+	char *author;
+	char *source;
+	char *composers;
 	int volume;
 	musicdef_t *next;
 };