__int16 __usercall sub_10005BA1<ax>(unsigned int a1<ebx>, signed int a2, char (**a3)[3], __int16 a4, char *a5)
{
  __int16 v5; // di@1
  char *v6; // eax@2
  signed int v7; // esi@4
  __int16 v9; // [sp+32Ch] [bp-Ch]@2
  char (**v10)[3]; // [sp+330h] [bp-8h]@2
  char v11; // [sp+8h] [bp-330h]@2
  char *v12; // [sp+334h] [bp-4h]@4

  v5 = -1;
  if ( a3 )
  {
    v10 = a3;
    v6 = a5;
    v9 = a4;
  }
  else
  {
    v9 = 33;
    v10 = &off_10019E50;
    v6 = &v11;
  }
  v12 = v6;
  sub_10005588((signed int)&v9);
  v7 = a2;
  if ( *(_WORD *)(a2 + 24) == 1 )
  {
    v5 = sub_100056AC(a1, a2, (int)&v9);
    *(_WORD *)(v7 + 26) = 1;
  }
  else
  {
    if ( *(_WORD *)(a2 + 24) == 3 )
    {
      v5 = sub_100058A1(a2, (int)&v9);
      *(_WORD *)(v7 + 26) = 3;
    }
  }
  return v5;
}

signed int __stdcall DecompressWave(int a1, int a2, __int16 a3, int a4)
{
  signed int result; // eax@1

  result = 0;
  if ( !a1 )
    result = -128;
  if ( a2 )
  {
    if ( !a4 )
      result = -128;
  }
  if ( !(_WORD)result )
  {
    if ( *(_WORD *)(a1 + 24) == 3 )
      result = sub_10005BA1(a1, a2, a3, a4);//这边调用了上面的函数
    else
      result = sub_10005D9B(a1);
  }
  return result;
}

DecompressWave函数为什么是那么奇怪的数字呢……

[招生]科锐逆向工程师培训(2024年11月15日实地，远程教学同时开班, 第51期)