From 4b6e8959bf1dc741dc78394f762a7bb582b246d8 Mon Sep 17 00:00:00 2001
From: Patrice Mandin <patmandin@gmail.com>
Date: Mon, 4 Jul 2005 19:45:30 +0000
Subject: [PATCH] Fix memory leaks in timidity player

---
 music.c             |  5 +++++
 timidity/common.c   | 34 +++++++++++++++++++++++++++-------
 timidity/common.h   |  1 +
 timidity/instrum.c  | 19 +++++++++++++------
 timidity/playmidi.c | 17 ++++++++++++++++-
 timidity/timidity.c |  4 ++--
 timidity/timidity.h |  2 +-
 7 files changed, 65 insertions(+), 17 deletions(-)

diff --git a/music.c b/music.c
index 0ff03494..da52ee29 100644
--- a/music.c
+++ b/music.c
@@ -1227,6 +1227,11 @@ void close_music(void)
 	MikMod_UnregisterAllDrivers();
 # endif
 #endif
+#ifdef MID_MUSIC
+# ifdef USE_TIMIDITY_MIDI
+	Timidity_Close();
+# endif
+#endif
 }
 
 # ifdef LIBMIKMOD_MUSIC
diff --git a/timidity/common.c b/timidity/common.c
index b33f21cb..7fd23809 100644
--- a/timidity/common.c
+++ b/timidity/common.c
@@ -36,13 +36,7 @@
 
 char current_filename[1024];
 
-#ifdef DEFAULT_PATH
-    /* The paths in this list will be tried whenever we're reading a file */
-    static PathList defaultpathlist={DEFAULT_PATH,0};
-    static PathList *pathlist=&defaultpathlist; /* This is a linked list */
-#else
-    static PathList *pathlist=0;
-#endif
+static PathList *pathlist=NULL;
 
 /* Try to open a file for reading. If the filename ends in one of the 
    defined compressor extensions, pipe the file through the decompressor */
@@ -110,6 +104,7 @@ FILE *open_file(char *name, int decompress, int noise_mode)
   FILE *fp;
   PathList *plp=pathlist;
   int l;
+  static int firsttime=1;
 
   if (!name || !(*name))
     {
@@ -117,6 +112,14 @@ FILE *open_file(char *name, int decompress, int noise_mode)
       return 0;
     }
 
+#ifdef DEFAULT_PATH
+  if (firsttime && (pathlist==NULL)) {
+    /* Generate path list */
+    add_to_pathlist(DEFAULT_PATH);
+    firsttime=0;
+  }
+#endif
+
   /* First try the given name */
 
   strncpy(current_filename, name, 1023);
@@ -224,3 +227,20 @@ void add_to_pathlist(char *s)
   plp->next=pathlist;
   pathlist=plp;
 }
+
+/* Free memory associated to path list */
+void free_pathlist(void)
+{
+  PathList *plp, *next_plp;
+
+  plp = pathlist;
+  while (plp) {
+    if (plp->path) {
+      free(plp->path);
+      plp->path=NULL;
+    }
+    next_plp = plp->next;
+    free(plp);
+    plp = next_plp;
+  }
+}
diff --git a/timidity/common.h b/timidity/common.h
index 3b3ae239..362fc53d 100644
--- a/timidity/common.h
+++ b/timidity/common.h
@@ -42,6 +42,7 @@ typedef struct {
 
 extern FILE *open_file(char *name, int decompress, int noise_mode);
 extern void add_to_pathlist(char *s);
+extern void free_pathlist(void);
 extern void close_file(FILE *fp);
 extern void skip(FILE *fp, size_t len);
 extern void *safe_malloc(size_t count);
diff --git a/timidity/instrum.c b/timidity/instrum.c
index ee9242a0..71da70ab 100644
--- a/timidity/instrum.c
+++ b/timidity/instrum.c
@@ -110,16 +110,23 @@ static void free_bank(int dr, int b)
   int i;
   ToneBank *bank=((dr) ? drumset[b] : tonebank[b]);
   for (i=0; i<MAXPROG; i++)
+  {
     if (bank->tone[i].layer)
-      {
-	/* Not that this could ever happen, of course */
-	if (bank->tone[i].layer != MAGIC_LOAD_INSTRUMENT)
+    {
+	  /* Not that this could ever happen, of course */
+	  if (bank->tone[i].layer != MAGIC_LOAD_INSTRUMENT)
 	  {
 	    free_layer(bank->tone[i].layer);
-	    bank->tone[i].layer=0;
+	    bank->tone[i].layer=NULL;
 	    bank->tone[i].last_used=-1;
 	  }
-      }
+    }
+    if (bank->tone[i].name)
+    {
+      free(bank->tone[i].name);
+      bank->tone[i].name = NULL;
+    }
+  }
 }
 
 
@@ -137,7 +144,7 @@ static void free_old_bank(int dr, int b, int how_old)
 		(dr)? "drum" : "inst", bank->tone[i].name,
 		i, b, bank->tone[i].last_used);
 	    free_layer(bank->tone[i].layer);
-	    bank->tone[i].layer=0;
+	    bank->tone[i].layer=NULL;
 	    bank->tone[i].last_used=-1;
 	  }
       }
diff --git a/timidity/playmidi.c b/timidity/playmidi.c
index 876692af..ad54575d 100644
--- a/timidity/playmidi.c
+++ b/timidity/playmidi.c
@@ -81,6 +81,7 @@ static int32 lost_notes, cut_notes;
 static int32 *buffer_pointer;
 static int32 buffered_count;
 extern int32 *common_buffer;
+extern resample_t *resample_buffer; /* to free it on Timidity_Close */
 
 static MidiEvent *event_list, *current_event;
 static int32 sample_count, current_sample;
@@ -1749,9 +1750,23 @@ void Timidity_Stop(void)
 void Timidity_FreeSong(MidiSong *song)
 {
   if (free_instruments_afterwards)
-      free_instruments();
+    free_instruments();
   
   free(song->events);
   free(song);
 }
 
+void Timidity_Close(void)
+{
+  if (resample_buffer) {
+    free(resample_buffer);
+    resample_buffer=NULL;
+  }
+  if (common_buffer) {
+    free(common_buffer);
+    common_buffer=NULL;
+  }
+  free_instruments();
+  free_pathlist();
+}
+
diff --git a/timidity/timidity.c b/timidity/timidity.c
index 86719bc1..f5bb87d9 100644
--- a/timidity/timidity.c
+++ b/timidity/timidity.c
@@ -39,8 +39,8 @@ int free_instruments_afterwards=0;
 static char def_instr_name[256]="";
 
 int AUDIO_BUFFER_SIZE;
-resample_t *resample_buffer;
-int32 *common_buffer;
+resample_t *resample_buffer=NULL;
+int32 *common_buffer=NULL;
 int num_ochannels;
 
 #define MAXWORDS 10
diff --git a/timidity/timidity.h b/timidity/timidity.h
index 2cffcc99..60281578 100644
--- a/timidity/timidity.h
+++ b/timidity/timidity.h
@@ -30,4 +30,4 @@ extern void Timidity_Start(MidiSong *song);
 extern int Timidity_Active(void);
 extern void Timidity_Stop(void);
 extern void Timidity_FreeSong(MidiSong *song);
-
+extern void Timidity_Close(void);