Merge pull request #149 from marijnvdwerf/decompile/bard_music

Decompile bard_music

1 files changed, 158 insertions, 0 deletions

diff --git a/src/bard_music.c b/src/bard_music.c
new file mode 100644
index 000000000..4cca0c068
--- /dev/null
+++ b/src/bard_music.c
@@ -0,0 +1,158 @@
+#include "global.h"
+#include "asm.h"
+
+typedef struct BardSound {
+    u8 pad_00[48];
+} BardSound;
+
+typedef struct UnkBard {
+    /* 0x00 */ u8 var00;
+    /* 0x01 */ s8 var01;
+    /* 0x02 */ u16 var02;
+    /* 0x04 */ u16 var04;
+    /* 0x06 */ u16 var06;
+} UnkBard;
+
+typedef struct UnkBard3 {
+    /* 0x00 */ u16 var00;
+    /* 0x02 */ u16 var02;
+    /* 0x04 */ s16 var04;
+    /* 0x06 */ u16 var06;
+} UnkBard3;
+
+typedef struct UnkBard2 {
+    /* 0x00 */ u8 var00;
+    /* 0x01 */ u8 var01;
+    /* 0x02 */ u8 var02;
+    /* 0x03 */ u8 var03;
+    /* 0x04 */ u16 var04;
+               u8 pad06[4];
+    /* 0x0A */ u16 var0A;
+               u8 pad0C[18];
+    /* 0x18 */ UnkBard3 var18[7]; // The size of this array likely is wrong
+} UnkBard2;
+
+extern BardSound *gBardMusicTable[];
+extern s16 *gUnknown_08417068[];
+extern u32 gUnknown_084170F4[];
+
+s16 sub_814A2B8(u32 arg0, u32 arg1) {
+    return gUnknown_08417068[arg0][arg1];
+}
+
+BardSound *sub_814A2D0(u16 arg0, u16 arg1) {
+    BardSound *sounds;
+
+    sounds = gBardMusicTable[arg0];
+
+    return &sounds[arg1];
+}
+
+#ifdef NONMATCHING
+void sub_814A2EC(UnkBard2 *dest, UnkBard (*src)[], u16 arg2) {
+    u32 i;
+    s32 n;
+
+    for (i = 0; i < 5; i++) {
+        s8 var01;
+        u32 i1;
+
+        dest->var18[i].var00 = src[i]->var00;
+        if (src[i]->var00 == 0xFF) {
+            continue;
+        }
+
+        var01 = src[i]->var01;
+        i1 = gUnknown_084170F4[src[i]->var00];
+        dest->var18[i].var02 = i1 + var01;
+        dest->var18[i].var06 = src[i]->var04;
+        dest->var04 += 1;
+    }
+
+
+    for (n = 0; n < 6; n++) {
+        dest->var18[n + 1].var04 = sub_814A2B8(30 + arg2, n);
+    }
+
+    dest->var00 += 1;
+    dest->var01 = 0;
+    dest->var02 = 0;
+    dest->var03 = 0;
+    dest->var0A = 0;
+}
+#else
+__attribute__((naked))
+void sub_814A2EC(void) {
+    asm(".syntax unified\n\
+    push {r4-r7,lr}\n\
+    mov r7, r9\n\
+    mov r6, r8\n\
+    push {r6,r7}\n\
+    adds r6, r0, 0\n\
+    lsls r2, 16\n\
+    lsrs r2, 16\n\
+    mov r9, r2\n\
+    ldr r4, _0814A370 @ =gUnknown_084170F4\n\
+    adds r2, r1, 0\n\
+    adds r3, r6, 0\n\
+    adds r3, 0x18\n\
+    movs r7, 0x5\n\
+_0814A306:\n\
+    ldrb r0, [r2]\n\
+    strh r0, [r3]\n\
+    ldrb r0, [r2]\n\
+    cmp r0, 0xFF\n\
+    beq _0814A328\n\
+    movs r1, 0x1\n\
+    ldrsb r1, [r2, r1]\n\
+    lsls r0, 2\n\
+    adds r0, r4\n\
+    ldr r0, [r0]\n\
+    adds r1, r0\n\
+    strh r1, [r3, 0x2]\n\
+    ldrh r0, [r2, 0x4]\n\
+    strh r0, [r3, 0x6]\n\
+    ldrh r0, [r6, 0x4]\n\
+    adds r0, r1\n\
+    strh r0, [r6, 0x4]\n\
+_0814A328:\n\
+    adds r2, 0x8\n\
+    adds r3, 0x8\n\
+    subs r7, 0x1\n\
+    cmp r7, 0\n\
+    bge _0814A306\n\
+    movs r7, 0x6\n\
+    movs r5, 0\n\
+    movs r0, 0x1E\n\
+    mov r8, r0\n\
+    adds r4, r6, 0\n\
+_0814A33C:\n\
+    mov r0, r8\n\
+    add r0, r9\n\
+    adds r1, r5, 0\n\
+    bl sub_814A2B8\n\
+    adds r1, r0, 0\n\
+    strh r1, [r4, 0x1C]\n\
+    adds r4, 0x8\n\
+    adds r5, 0x1\n\
+    cmp r5, r7\n\
+    blt _0814A33C\n\
+    ldrb r1, [r6]\n\
+    adds r1, 0x1\n\
+    movs r2, 0\n\
+    strb r1, [r6]\n\
+    strb r2, [r6, 0x1]\n\
+    strb r2, [r6, 0x2]\n\
+    strb r2, [r6, 0x3]\n\
+    strh r2, [r6, 0xA]\n\
+    pop {r3,r4}\n\
+    mov r8, r3\n\
+    mov r9, r4\n\
+    pop {r4-r7}\n\
+    pop {r1}\n\
+    bx r1\n\
+    .align 2, 0\n\
+_0814A370: .4byte gUnknown_084170F4\n\
+    .syntax divided\n");
+}
+#endif