5% wooo

1 files changed, 190 insertions, 35 deletions

diff --git a/src/music_pre.c b/src/music_pre.c
index 4260ea1..42a8cb0 100644
--- a/src/music_pre.c
+++ b/src/music_pre.c
@@ -2,24 +2,33 @@
 #include "gba/io_reg.h"
 #include "m4a.h"
 #include "bg.h"
+#include "music.h"
 
-extern void nullsub_19(void);
-extern void nullsub_20(u16 songIndex);
 extern bool8 EnableInterrupts(void);
 extern bool8 DisableInterrupts(void);
-extern bool8 IsBGSong(u32);
+extern void SoundBiasReset();
+extern void SoundBiasSet();
+extern void SetInterruptFlag(u16);
+extern void nullsub_25();
+extern void nullsub_18();
 
 extern void sub_800C298(u16 r0);
-extern u16 sub_800CAE0(u16);
 
-extern u32 gUnknown_202D5F0[];
-extern u16 gUnknown_202D688;
-extern u16 gUnknown_202D68A;
+typedef void (*IntrCallback)(void);
+extern IntrCallback gUnknown_202D5F0[];
+
+extern u32 gUnknown_203B0A0;
+extern u16 gBGMusicPlayerState;
+extern u16 gCurrentBGSong;
 extern u16 gUnknown_202D68C;
 extern u16 gUnknown_202D68E;
 extern u16 gUnknown_202D690;
 extern u16 gUnknown_202D692;
 extern u8 gUnknown_202D694;
+extern u8 gUnknown_203B099;
+extern u8 gUnknown_203B09B;
+extern u32 gUnknown_203B09C;
+extern u8 gUnknown_203B09A;
 
 struct unkStruct_3000FD8
 {
@@ -40,6 +49,152 @@ extern struct BGControlStruct gUnknown_202D6A8;
 extern struct BGControlStruct gUnknown_202D6B0;
 
 void sub_800BF80(void);
+void xxx_update_bg_sound_input(void);
+
+void sub_800BA5C(void)
+{
+    if(gUnknown_203B09A != 0)
+    {
+        gUnknown_203B09C++;
+        xxx_update_bg_sound_input();
+    }
+    gUnknown_203B09A = 1;
+    gUnknown_203B09B = 0;
+    gUnknown_203B09C = 0;
+    nullsub_25();
+
+    while(REG_VCOUNT > 159){}
+
+    gUnknown_203B099 = 1;
+    VBlankIntrWait();
+    nullsub_18();
+}
+
+#ifdef NONMATCHING
+void xxx_update_bg_sound_input(void)
+{
+    u8 store;
+    store = gUnknown_203B09B;
+    if(gUnknown_203B09B != 0){
+        gUnknown_203B09C++;
+    }
+    else {
+        gUnknown_203B09B = 1;
+        gUnknown_203B09A = store;
+        gUnknown_203B09C = store;
+        UpdateBGControlRegisters();
+        if(gUnknown_203B099 != 0)
+            UpdateSound();
+        UpdateInput();
+        gUnknown_203B099 = store;
+        gUnknown_203B0A4 = gUnknown_203B0A0;
+    }
+}
+#else
+NAKED
+void xxx_update_bg_sound_input(void)
+{
+	asm_unified("\tpush {r4,r5,lr}\n"
+	"\tldr r1, _0800BACC\n"
+	"\tldrb r4, [r1]\n"
+	"\tcmp r4, 0\n"
+	"\tbeq _0800BAD4\n"
+	"\tldr r1, _0800BAD0\n"
+	"\tldr r0, [r1]\n"
+	"\tadds r0, 0x1\n"
+	"\tstr r0, [r1]\n"
+	"\tb _0800BAFE\n"
+	"\t.align 2, 0\n"
+"_0800BACC: .4byte gUnknown_203B09B\n"
+"_0800BAD0: .4byte gUnknown_203B09C\n"
+"_0800BAD4:\n"
+	"\tmovs r0, 0x1\n"
+	"\tstrb r0, [r1]\n"
+	"\tldr r0, _0800BB04\n"
+	"\tstrb r4, [r0]\n"
+	"\tldr r0, _0800BB08\n"
+	"\tstr r4, [r0]\n"
+	"\tbl UpdateBGControlRegisters\n"
+	"\tldr r5, _0800BB0C\n"
+        "\tldrb r0, [r5]\n"
+	"\tcmp r0, 0\n"
+	"\tbeq _0800BAF0\n"
+	"\tbl UpdateSound\n"
+"_0800BAF0:\n"
+	"\tbl UpdateInput\n"
+	"\tstrb r4, [r5]\n"
+	"\tldr r0, _0800BB10\n"
+	"\tldr r1, _0800BB14\n"
+	"\tldr r1, [r1]\n"
+	"\tstr r1, [r0]\n"
+"_0800BAFE:\n"
+	"\tpop {r4,r5}\n"
+	"\tpop {r0}\n"
+	"\tbx r0\n"
+	"\t.align 2, 0\n"
+"_0800BB04: .4byte gUnknown_203B09A\n"
+"_0800BB08: .4byte gUnknown_203B09C\n"
+"_0800BB0C: .4byte gUnknown_203B099\n"
+"_0800BB10: .4byte gUnknown_203B0A4\n"
+"_0800BB14: .4byte gUnknown_203B0A0");
+}
+#endif
+
+void Timer3Intr(void)
+{
+    if(gUnknown_202D5F0[4])
+        gUnknown_202D5F0[4]();
+    SetInterruptFlag(INTR_FLAG_TIMER3);
+}
+
+// Unused
+u32 sub_800BB34(void)
+{
+    return gUnknown_203B0A0;
+}
+
+void nullsub_178(void)
+{
+}
+
+// Unused
+void sub_800BB44(void)
+{
+    u16 ie_store;
+    u16 dispcnt_store;
+    bool8 interrupt_flag;
+
+    while(REG_KEYINPUT != 0x3ff){}
+
+    interrupt_flag = DisableInterrupts();
+
+    while(REG_VCOUNT <= 159){}
+
+    dispcnt_store = REG_DISPCNT;
+    REG_DISPCNT = 0x80;
+
+    *(vu16 *)BG_PLTT = 0x7fff;
+
+    ie_store = REG_IE;
+    REG_IE = INTR_FLAG_KEYPAD | INTR_FLAG_GAMEPAK;
+
+    REG_KEYCNT = 0x8304;
+    REG_IME = 1;
+
+    SoundBiasReset();
+    asm("swi 0x3");
+    SoundBiasSet();
+
+    REG_IME = 0;
+    REG_IE = ie_store;
+    REG_KEYCNT = 0;
+    REG_DISPCNT = dispcnt_store;
+    *(vu16 *)BG_PLTT = 0;
+
+    if(interrupt_flag)
+        EnableInterrupts();
+    while(REG_KEYINPUT != 0x3ff){}
+}
 
 void nullsub_17(void)
 {
@@ -104,9 +259,9 @@ void sub_800BD08(void)
 
     m4aSoundInit();
 
-    gUnknown_202D688 = 0;
-    gUnknown_202D68A = 0x3e7;
-    gUnknown_202D68C = 0x3e7;
+    gBGMusicPlayerState = 0;
+    gCurrentBGSong = 999;
+    gUnknown_202D68C = 999;
     gUnknown_202D68E = 0x3e5;
     gUnknown_202D690 = 0;
     gUnknown_202D692 = 0;
@@ -138,18 +293,18 @@ void sub_800BDDC(void)
 }
 
 
-void sub_800BDFC(u16 songIndex)
+void StartNewBGM(u16 songIndex)
 {
     bool8 interrupt_flag;
     u16 temp_store;
 
     if(!IsBGSong(songIndex))
         return;
-    if(songIndex == 0x3e7)
+    if(songIndex == 999)
         return;
-    if(songIndex == gUnknown_202D68A)
+    if(songIndex == gCurrentBGSong)
     {
-        temp_store = gUnknown_202D688 - 1;
+        temp_store = gBGMusicPlayerState - 1;
         if(temp_store <= 1)
             return;
     }
@@ -159,12 +314,12 @@ void sub_800BDFC(u16 songIndex)
         return;
     }
     interrupt_flag = DisableInterrupts();
-    gUnknown_202D68A = songIndex;
+    gCurrentBGSong = songIndex;
     gUnknown_202D694 = 1;
 
     if(gUnknown_202D690 == 0)
     {
-        gUnknown_202D688 = 1;
+        gBGMusicPlayerState = 1;
         m4aSongNumStart(songIndex);
     }
     if(interrupt_flag)
@@ -178,11 +333,11 @@ void FadeInNewBGM(u16 SongIndex, u16 speed)
 
     if(!IsBGSong(SongIndex))
         return;
-    if(SongIndex == 0x3e7)
+    if(SongIndex == 999)
         return;
-    if(SongIndex == gUnknown_202D68A)
+    if(SongIndex == gCurrentBGSong)
     {
-        temp_store = gUnknown_202D688 - 1;
+        temp_store = gBGMusicPlayerState - 1;
         if((temp_store) <= 1)
             return;
     }
@@ -201,12 +356,12 @@ void FadeInNewBGM(u16 SongIndex, u16 speed)
     }
 
     interrupt_flag = DisableInterrupts();
-    gUnknown_202D68A = SongIndex;
+    gCurrentBGSong = SongIndex;
     gUnknown_202D694 = 1;
 
     if(gUnknown_202D690 == 0)
     {
-        gUnknown_202D688 = 1;
+        gBGMusicPlayerState = 1;
         m4aSongNumStart(SongIndex);
         m4aMPlayImmInit(&gUnknown_20008F0);
         m4aMPlayVolumeControl(&gUnknown_20008F0, 0xFF, 0);
@@ -219,10 +374,10 @@ void FadeInNewBGM(u16 SongIndex, u16 speed)
 
 void sub_800BF48(u16 SongIndex)
 {
-    u16 preload  = gUnknown_202D68A;
-    if(preload == 0x3e7)
+    u16 preload  = gCurrentBGSong;
+    if(preload == 999)
     {
-        sub_800BDFC(SongIndex);
+        StartNewBGM(SongIndex);
         gUnknown_202D68C = preload;
         return;
     }
@@ -234,13 +389,13 @@ void sub_800BF80(void)
     bool8 interrupt_flag = DisableInterrupts();
     if(gUnknown_202D690 == 0)
     {
-        if(gUnknown_202D68A != 0x3e7)
+        if(gCurrentBGSong != 999)
         {
             m4aMPlayStop(&gUnknown_20008F0);
         }
     }
-    gUnknown_202D68A = 0x3e7;
-    gUnknown_202D68C = 0x3e7;
+    gCurrentBGSong = 999;
+    gUnknown_202D68C = 999;
     if(interrupt_flag)
         EnableInterrupts();
 }
@@ -267,30 +422,30 @@ void sub_800BFD0(u16 speed)
     interrupt_flag = DisableInterrupts();
     if(gUnknown_202D690 == 0)
     {
-        if(gUnknown_202D68A != 0x3e7)
+        if(gCurrentBGSong != 999)
         {
-            if(gUnknown_202D688 == 2)
+            if(gBGMusicPlayerState == 2)
             {
-                gUnknown_202D688 = 3;
+                gBGMusicPlayerState = 3;
                 m4aMPlayFadeOut(&gUnknown_20008F0, speed);
             }
             else
             {
-                gUnknown_202D68A = 0x3e7;
+                gCurrentBGSong = 999;
                 m4aMPlayStop(&gUnknown_20008F0);
             }
         }
     }
     else
     {
-        gUnknown_202D68A = 0x3e7;
+        gCurrentBGSong = 999;
     }
-    gUnknown_202D68C = 0x3e7;
+    gUnknown_202D68C = 999;
     if(interrupt_flag)
         EnableInterrupts();
 }
 
-u16 sub_800C068(void)
+u16 GetCurrentBGSong(void)
 {
-    return gUnknown_202D68A;
+    return gCurrentBGSong;
 }