decomp, label, doc, repeat

1 files changed, 356 insertions, 16 deletions

diff --git a/src/music_pre.c b/src/music_pre.c
index 42a8cb0..5c0589a 100644
--- a/src/music_pre.c
+++ b/src/music_pre.c
@@ -11,13 +11,17 @@ extern void SoundBiasSet();
 extern void SetInterruptFlag(u16);
 extern void nullsub_25();
 extern void nullsub_18();
+extern void UpdateSound();
+extern void UpdateInput();
 
 extern void sub_800C298(u16 r0);
 
 typedef void (*IntrCallback)(void);
 extern IntrCallback gUnknown_202D5F0[];
 
+extern struct MusicPlayerInfo gUnknown_20008F0; // BGM??
 extern u32 gUnknown_203B0A0;
+extern u32 gUnknown_203B0A4;
 extern u16 gBGMusicPlayerState;
 extern u16 gCurrentBGSong;
 extern u16 gUnknown_202D68C;
@@ -33,20 +37,19 @@ extern u8 gUnknown_203B09A;
 struct unkStruct_3000FD8
 {
     u16 unk0;
-    u16 unk2;
+    u16 songIndex;
     u16 unk4;
     u8 unk6;
-    u8 padding;
 };
 
 extern struct unkStruct_3000FD8 gUnknown_3000FD8[8];
 
 extern u8 gUnknown_202D7FE;
 extern u16 gUnknown_202D7FC;
-extern struct BGControlStruct gUnknown_202D698;
-extern struct BGControlStruct gUnknown_202D6A0;
-extern struct BGControlStruct gUnknown_202D6A8;
-extern struct BGControlStruct gUnknown_202D6B0;
+extern struct BGControlStruct gBG0Control;
+extern struct BGControlStruct gBG1Control;
+extern struct BGControlStruct gBG2Control;
+extern struct BGControlStruct gBG3Control;
 
 void sub_800BF80(void);
 void xxx_update_bg_sound_input(void);
@@ -219,18 +222,18 @@ void UpdateBGControlRegisters(void)
         BG[3] = 3;
     }
 
-    REG_BG0HOFS = gUnknown_202D698.hofs;
-    REG_BG0VOFS = gUnknown_202D698.vofs;
-    REG_BG1HOFS = gUnknown_202D6A0.hofs;
-    REG_BG1VOFS = gUnknown_202D6A0.vofs;
-    REG_BG2HOFS = gUnknown_202D6A8.hofs;
-    REG_BG2VOFS = gUnknown_202D6A8.vofs;
-    REG_BG3HOFS = gUnknown_202D6B0.hofs;
-    REG_BG3VOFS = gUnknown_202D6B0.vofs;
+    REG_BG0HOFS = gBG0Control.hofs;
+    REG_BG0VOFS = gBG0Control.vofs;
+    REG_BG1HOFS = gBG1Control.hofs;
+    REG_BG1VOFS = gBG1Control.vofs;
+    REG_BG2HOFS = gBG2Control.hofs;
+    REG_BG2VOFS = gBG2Control.vofs;
+    REG_BG3HOFS = gBG3Control.hofs;
+    REG_BG3VOFS = gBG3Control.vofs;
 
     REG_BG0CNT = BG[0] | 0xB0 << 6;
     REG_BG1CNT = BG[1] | 0xB4 << 6;
-    if(gUnknown_202D6A8.unk2 == 0x80 << 8)
+    if(gBG2Control.unk2 == 0x80 << 8)
     {
         REG_BG2CNT = BG[2] | 0x2e08;
     }
@@ -276,7 +279,7 @@ void sub_800BD08(void)
     while(counter >= 0)
     {
         preload->unk0 = zero2;
-        preload->unk2 = 0x3e5;
+        preload->songIndex = 0x3e5;
         preload->unk4 = zero2;
         preload->unk6 = zero;
         counter--;
@@ -449,3 +452,340 @@ u16 GetCurrentBGSong(void)
 {
     return gCurrentBGSong;
 }
+
+#ifdef NONMATCHING
+void sub_800C074(u16 SongIndex,u16 param_2)
+{
+  bool8 interrupt_flag;
+  u16 msVar;
+  struct unkStruct_3000FD8 *preload;
+
+  if (SongIndex == 0x3e5)
+    return;
+  if (0x100 < param_2)
+    param_2 = 0x100;
+
+  if (sub_800CACC(SongIndex)) 
+  {
+    msVar = sub_800CAE0(SongIndex);
+    if (msVar == 1) {
+      interrupt_flag = DisableInterrupts();
+      gUnknown_202D68E = SongIndex;
+      if(gUnknown_202D690 == 0)
+      {
+        if (gCurrentBGSong != 999) 
+        {
+            if ((u16)(gBGMusicPlayerState - 1U) < 2) 
+            {
+                gUnknown_202D690 = msVar;
+                gUnknown_202D692 = 16;
+                gUnknown_202D694 = 0;
+                m4aMPlayFadeOutTemporarily(&gUnknown_20008F0,1);
+            }
+            else 
+            {
+                if (gBGMusicPlayerState == 3)
+                    gUnknown_202D690 = 2;
+                else
+                {
+                    gUnknown_202D690 = 3;
+                    m4aMPlayStop(&gUnknown_20008F0);
+                    m4aSongNumStart(gUnknown_202D68E);
+                }
+            }
+        }
+      }
+      else
+      {
+        if (1 < (u16)(gUnknown_202D690 - 1U)) 
+        {
+            m4aMPlayStop(&gUnknown_20008F0);
+            m4aSongNumStart(gUnknown_202D68E);
+            gUnknown_202D690 = 3;
+        }
+      }
+      switch(gCurrentBGSong)
+      {
+        case 26: // 0x1A
+        case 27: // 0x1B
+        case 28: // 0x1C
+        case 29: // 0x1D
+        case 30: // 0x1E
+        case 31: // 0x1F
+        case 34: // 0x22
+        case 35: // 0x23
+        case 37: // 0x25
+        case 38: // 0x26
+        case 117: // 0x75
+        case 118: // 0x76
+        case 119: // 0x77
+        case 122: // 0x7A
+        case 127: // 0x7F
+            gUnknown_202D694 = 1;
+            break;
+        default:
+            break;
+      }
+      if (interrupt_flag)
+        EnableInterrupts();
+    }
+    else
+    {
+        nullsub_20(SongIndex);
+    }
+  }
+  else
+  {
+    if (!sub_800CAAC(SongIndex))
+      return;
+    msVar = sub_800CAE0(SongIndex);
+    preload = &gUnknown_3000FD8[msVar]; // need to load this before comparison to match
+    if (msVar <= 1)
+        nullsub_20(SongIndex);
+    else
+    {
+      interrupt_flag = DisableInterrupts();
+      m4aSongNumStart(SongIndex);
+      preload->unk0 = 1;
+      preload->songIndex = SongIndex;
+      // TODO fix this comparison
+      // Generates eor/neg/lsr
+      preload->unk6 = param_2 != 0x100;
+      preload->unk4 = param_2;
+      if (interrupt_flag)
+        EnableInterrupts();
+    }
+  }
+}
+#else
+NAKED
+void sub_800C074(u16 SongIndex, u16 param_2)
+{
+	asm_unified("\tpush {r4-r7,lr}\n"
+	"\tmov r7, r8\n"
+	"\tpush {r7}\n"
+	"\tlsls r0, 16\n"
+	"\tlsrs r5, r0, 16\n"
+	"\tmov r8, r5\n"
+	"\tlsls r1, 16\n"
+	"\tlsrs r6, r1, 16\n"
+	"\tldr r0, _0800C0FC\n"
+	"\tcmp r5, r0\n"
+	"\tbne _0800C08C\n"
+	"\tb _0800C208\n"
+"_0800C08C:\n"
+	"\tmovs r7, 0x80\n"
+	"\tlsls r7, 1\n"
+	"\tcmp r6, r7\n"
+	"\tbls _0800C096\n"
+	"\tadds r6, r7, 0\n"
+"_0800C096:\n"
+	"\tadds r0, r5, 0\n"
+	"\tbl sub_800CACC\n"
+	"\tlsls r0, 24\n"
+	"\tcmp r0, 0\n"
+	"\tbne _0800C0A4\n"
+	"\tb _0800C1B0\n"
+"_0800C0A4:\n"
+	"\tadds r0, r5, 0\n"
+	"\tbl sub_800CAE0\n"
+	"\tlsls r0, 16\n"
+	"\tlsrs r7, r0, 16\n"
+	"\tcmp r7, 0x1\n"
+	"\tbeq _0800C0B4\n"
+	"\tb _0800C1D0\n"
+"_0800C0B4:\n"
+	"\tbl DisableInterrupts\n"
+	"\tlsls r0, 24\n"
+	"\tlsrs r0, 24\n"
+	"\tmov r8, r0\n"
+	"\tldr r6, _0800C100\n"
+	"\tstrh r5, [r6]\n"
+	"\tldr r4, _0800C104\n"
+	"\tldrh r0, [r4]\n"
+	"\tadds r2, r0, 0\n"
+	"\tcmp r2, 0\n"
+	"\tbne _0800C144\n"
+	"\tldr r0, _0800C108\n"
+	"\tldrh r1, [r0]\n"
+	"\tldr r0, _0800C10C\n"
+	"\tcmp r1, r0\n"
+	"\tbeq _0800C12C\n"
+	"\tldr r0, _0800C110\n"
+	"\tldrh r1, [r0]\n"
+	"\tsubs r0, r1, 0x1\n"
+	"\tlsls r0, 16\n"
+	"\tlsrs r0, 16\n"
+	"\tcmp r0, 0x1\n"
+	"\tbhi _0800C120\n"
+	"\tstrh r7, [r4]\n"
+	"\tldr r1, _0800C114\n"
+	"\tmovs r0, 0x10\n"
+	"\tstrh r0, [r1]\n"
+	"\tldr r0, _0800C118\n"
+	"\tstrb r2, [r0]\n"
+	"\tldr r0, _0800C11C\n"
+	"\tmovs r1, 0x1\n"
+	"\tbl m4aMPlayFadeOutTemporarily\n"
+	"\tb _0800C15E\n"
+	"\t.align 2, 0\n"
+"_0800C0FC: .4byte 0x000003e5\n"
+"_0800C100: .4byte gUnknown_202D68E\n"
+"_0800C104: .4byte gUnknown_202D690\n"
+"_0800C108: .4byte gCurrentBGSong\n"
+"_0800C10C: .4byte 0x000003e7\n"
+"_0800C110: .4byte gBGMusicPlayerState\n"
+"_0800C114: .4byte gUnknown_202D692\n"
+"_0800C118: .4byte gUnknown_202D694\n"
+"_0800C11C: .4byte gUnknown_20008F0\n"
+"_0800C120:\n"
+	"\tlsls r0, r1, 16\n"
+	"\tlsrs r0, 16\n"
+	"\tcmp r0, 0x3\n"
+	"\tbne _0800C12C\n"
+	"\tmovs r0, 0x2\n"
+	"\tb _0800C15C\n"
+"_0800C12C:\n"
+	"\tmovs r0, 0x3\n"
+	"\tstrh r0, [r4]\n"
+	"\tldr r0, _0800C140\n"
+	"\tbl m4aMPlayStop\n"
+	"\tldrh r0, [r6]\n"
+	"\tbl m4aSongNumStart\n"
+	"\tb _0800C15E\n"
+	"\t.align 2, 0\n"
+"_0800C140: .4byte gUnknown_20008F0\n"
+"_0800C144:\n"
+	"\tsubs r0, 0x1\n"
+	"\tlsls r0, 16\n"
+	"\tlsrs r0, 16\n"
+	"\tcmp r0, 0x1\n"
+	"\tbls _0800C15E\n"
+	"\tldr r0, _0800C17C\n"
+	"\tbl m4aMPlayStop\n"
+	"\tldrh r0, [r6]\n"
+	"\tbl m4aSongNumStart\n"
+	"\tmovs r0, 0x3\n"
+"_0800C15C:\n"
+	"\tstrh r0, [r4]\n"
+"_0800C15E:\n"
+	"\tldr r0, _0800C180\n"
+	"\tldrh r0, [r0]\n"
+	"\tcmp r0, 0x26\n"
+	"\tbgt _0800C184\n"
+	"\tcmp r0, 0x25\n"
+	"\tbge _0800C19A\n"
+	"\tcmp r0, 0x1A\n"
+	"\tblt _0800C1A0\n"
+	"\tcmp r0, 0x1F\n"
+	"\tble _0800C19A\n"
+	"\tcmp r0, 0x23\n"
+	"\tbgt _0800C1A0\n"
+	"\tcmp r0, 0x22\n"
+	"\tblt _0800C1A0\n"
+	"\tb _0800C19A\n"
+	"\t.align 2, 0\n"
+"_0800C17C: .4byte gUnknown_20008F0\n"
+"_0800C180: .4byte gCurrentBGSong\n"
+"_0800C184:\n"
+	"\tcmp r0, 0x7A\n"
+	"\tbeq _0800C19A\n"
+	"\tcmp r0, 0x7A\n"
+	"\tbgt _0800C196\n"
+	"\tcmp r0, 0x77\n"
+	"\tbgt _0800C1A0\n"
+	"\tcmp r0, 0x75\n"
+	"\tblt _0800C1A0\n"
+	"\tb _0800C19A\n"
+"_0800C196:\n"
+	"\tcmp r0, 0x7F\n"
+	"\tbne _0800C1A0\n"
+"_0800C19A:\n"
+	"\tldr r1, _0800C1AC\n"
+	"\tmovs r0, 0x1\n"
+	"\tstrb r0, [r1]\n"
+"_0800C1A0:\n"
+	"\tmov r0, r8\n"
+	"\tcmp r0, 0\n"
+	"\tbeq _0800C208\n"
+	"\tbl EnableInterrupts\n"
+	"\tb _0800C208\n"
+	"\t.align 2, 0\n"
+"_0800C1AC: .4byte gUnknown_202D694\n"
+"_0800C1B0:\n"
+	"\tadds r0, r5, 0\n"
+	"\tbl sub_800CAAC\n"
+	"\tlsls r0, 24\n"
+	"\tcmp r0, 0\n"
+	"\tbeq _0800C208\n"
+	"\tadds r0, r5, 0\n"
+	"\tbl sub_800CAE0\n"
+	"\tlsls r0, 16\n"
+	"\tlsrs r0, 16\n"
+	"\tlsls r2, r0, 3\n"
+	"\tldr r1, _0800C1D8\n"
+	"\tadds r4, r2, r1\n"
+	"\tcmp r0, 0x1\n"
+	"\tbhi _0800C1DC\n"
+"_0800C1D0:\n"
+	"\tadds r0, r5, 0\n"
+	"\tbl nullsub_20\n"
+	"\tb _0800C208\n"
+	"\t.align 2, 0\n"
+"_0800C1D8: .4byte gUnknown_3000FD8\n"
+"_0800C1DC:\n"
+	"\tbl DisableInterrupts\n"
+	"\tlsls r0, 24\n"
+	"\tlsrs r5, r0, 24\n"
+	"\tmov r0, r8\n"
+	"\tbl m4aSongNumStart\n"
+	"\tmovs r0, 0x1\n"
+	"\tstrh r0, [r4]\n"
+	"\tmov r0, r8\n"
+	"\tstrh r0, [r4, 0x2]\n"
+	"\tcmp r6, r7\n"
+	"\tbne _0800C1FA\n"
+	"\tmovs r0, 0\n"
+	"\tb _0800C1FC\n"
+"_0800C1FA:\n"
+	"\tmovs r0, 0x1\n"
+"_0800C1FC:\n"
+	"\tstrb r0, [r4, 0x6]\n"
+	"\tstrh r6, [r4, 0x4]\n"
+	"\tcmp r5, 0\n"
+	"\tbeq _0800C208\n"
+	"\tbl EnableInterrupts\n"
+"_0800C208:\n"
+	"\tpop {r3}\n"
+	"\tmov r8, r3\n"
+	"\tpop {r4-r7}\n"
+	"\tpop {r0}\n"
+	"\tbx r0");
+}
+#endif
+
+void sub_800C214(u16 songIndex, u16 volume)
+{
+  bool8 interrupt_flag;
+  u16 msVar;
+  struct MusicPlayerInfo *info;
+  struct unkStruct_3000FD8 *preload;
+
+  if (256 < volume) {
+    volume = 256;
+  }
+
+  if ((!sub_800CACC(songIndex)) && (sub_800CAAC(songIndex))) {
+    msVar = sub_800CAE0(songIndex);
+    info = gMPlayTable[msVar].info;
+    preload = &gUnknown_3000FD8[msVar];
+    if (msVar > 1) {
+      interrupt_flag = DisableInterrupts();
+      if (preload->songIndex == songIndex) {
+        m4aMPlayVolumeControl(info, 0xf, volume);
+      }
+      if (interrupt_flag)
+        EnableInterrupts();
+    }
+  }
+}