int __fastcall decBufferV3(int a1)
{
  _BYTE *lpBuffer; // r7
  unsigned int v3; // r8
  int result; // r0
  char v5; // r11
  _BYTE *v6; // r2
  _BYTE *v7; // r3
  int v8; // r9
  int v9; // r2
  void *v10; // r6
  void *v11; // r0
  unsigned int v12; // r4
  signed int v13; // r8
  char *v14; // r4
  int v15; // r3
  int v16; // r10
  int v17; // r3
  int v18; // r0
  int v19; // r0
  _BOOL4 v20; // r4
  unsigned int *v21; // r2
  int v22; // r3
  void *v23; // r6
  char v24[4]; // [sp+8h] [bp-240h] BYREF
  char v25[4]; // [sp+Ch] [bp-23Ch] BYREF
  int v26; // [sp+10h] [bp-238h] BYREF
  char v27[264]; // [sp+14h] [bp-234h] BYREF
  char v28[128]; // [sp+11Ch] [bp-12Ch] BYREF
  char v29[128]; // [sp+19Ch] [bp-ACh] BYREF

  if ( !a1 )
    return 0;
  lpBuffer = (_BYTE *)(*(int (__fastcall **)(int))(*(_DWORD *)a1 + 16))(a1);
  if ( !lpBuffer )
    return 0;
  v3 = (*(int (__fastcall **)(int))(*(_DWORD *)a1 + 12))(a1);
  if ( v3 <= 4 || memcmp(&byte_AA108C, lpBuffer, 4u) )
    return 1;
  v5 = lpBuffer[4];
  if ( (v5 & 1) == 0 )
  {
    v12 = 5;
    v8 = 0;
    goto LABEL_23;
  }
  if ( v3 == 5 )
    return 0;
  v6 = &lpBuffer[v3];
  if ( lpBuffer + 5 >= &lpBuffer[v3] )
    goto LABEL_40;
  v7 = lpBuffer + 6;
  v8 = lpBuffer[5] & 0x7F;
  if ( (lpBuffer[5] & 0x80) != 0 )
  {
    if ( v7 >= v6 )
      goto LABEL_40;
    v7 = lpBuffer + 7;
    v8 |= (lpBuffer[6] & 0x7F) << 7;
    if ( (lpBuffer[6] & 0x80) != 0 )
    {
      if ( v6 <= v7 )
        goto LABEL_40;
      v7 = lpBuffer + 8;
      v8 |= (lpBuffer[7] & 0x7F) << 14;
      if ( (lpBuffer[7] & 0x80) != 0 )
      {
        if ( v7 >= v6 )
          goto LABEL_40;
        v7 = lpBuffer + 9;
        v8 |= (lpBuffer[8] & 0x7F) << 21;
        if ( (lpBuffer[8] & 0x80) != 0 )
        {
          if ( v6 > v7 )
          {
            v9 = (unsigned __int8)lpBuffer[9];
            v7 = lpBuffer + 10;
            v8 |= v9 << 28;
            if ( (v9 & 0x80) != 0 )
            {
              v10 = _cxa_allocate_exception(8u);
              sub_961E88((int)&v26, "Format_Bad7BitInt32", (int)v25);
              ((void (__fastcall *)(void *, int *))sub_951AA4)(v10, &v26);
              v11 = (void *)(v26 - 12);
              if ( (int *)(v26 - 12) != &dword_BDCD20 )
              {
                if ( &pthread_create )
                {
                  v21 = (unsigned int *)(v26 - 4);
                  __dmb(0xFu);
                  do
                    v22 = __ldrex(v21);
                  while ( __strex(v22 - 1, v21) );
                  __dmb(0xFu);
                }
                else
                {
                  v22 = *(_DWORD *)(v26 - 4);
                  *(_DWORD *)(v26 - 4) = v22 - 1;
                }
                if ( v22 <= 0 )
                  operator delete(v11);
              }
              _cxa_throw(
                v10,
                (struct type_info *)&`typeinfo for'std::logic_error,
                (void (__fastcall *)(void *))sub_951258);
            }
            goto LABEL_32;
          }
LABEL_40:
          v23 = _cxa_allocate_exception(8u);
          sub_961E88((int)&v26, "ibstream_view::consume out of range!", (int)v25);
          sub_951B58(v23, &v26);
          if ( (int *)(v26 - 12) != &dword_BDCD20 )
            sub_2A24E8(v26 - 12, v24);
          _cxa_throw(v23, (struct type_info *)&`typeinfo for'std::out_of_range, (void (__fastcall *)(void *))sub_9515F8);
        }
      }
    }
  }
LABEL_32:
  v12 = v7 - lpBuffer;
LABEL_23:
  if ( v12 >= v3 )
    return 0;
  v13 = v3 - v12;
  av_rc4_init((int)v27, (int)&byte_AA1090, 0x50);
  v14 = &lpBuffer[v12];
  v15 = v13;
  if ( (v5 & 2) != 0 && v13 >= 128 )
    v15 = 128;
  av_rc4_crypt((int)v27, v14, v14, v15);
  if ( (v5 & 1) != 0 )
  {
    v16 = (*(int (__fastcall **)(int, char *, char *))(*(_DWORD *)a1 + 24))(a1, v28, v29);
    (*(void (__fastcall **)(int, int))(*(_DWORD *)v16 + 8))(v16, v8);
    v17 = *(_DWORD *)v16;
    v26 = v8;
    v18 = (*(int (__fastcall **)(int))(v17 + 16))(v16);
    v19 = uncompress(v18, &v26, v14, v13);
    v20 = v19 == 0;
    if ( v19 )
    {
      result = 0;
    }
    else
    {
      (*(void (__fastcall **)(int, int))(*(_DWORD *)a1 + 20))(a1, v16);
      (*(void (__fastcall **)(int, int))(*(_DWORD *)a1 + 28))(a1, v16);
      result = v20;
    }
  }
  else
  {
    memmove(lpBuffer, v14, v13);
    (*(void (__fastcall **)(int, signed int))(*(_DWORD *)a1 + 8))(a1, v13);
    result = 1;
  }
  return result;
}