public VifUnpacker(byte[] code)
{
_code = code;
_programCounter = 0;
_vifnMask = new VIFn_Mask(0);
_vifnCol = new uint[4];
_vifnRow = new uint[4];
_readSigned = new Func <uint>[]
{
ReadInt32,
ReadInt16,
ReadInt8,
ReadInt16,
};
_readUnsigned = new Func <uint>[]
{
ReadUInt32,
ReadUInt16,
ReadUInt8,
ReadUInt16
};
_unpacker = new Action <Func <uint> >[]
{
UnpackSingle,
UnpackVector2,
UnpackVector3,
UnpackVector4,
};
}
private State Step()
{
if (_programCounter >= _code.Length)
{
return(State.End);
}
var opcode = new Opcode(ReadUInt32());
if (opcode.IsUnpack)
{
Unpack(opcode);
}
else
{
switch (opcode.Cmd)
{
case CmdNop:
break;
case CmdStcycl:
// KH2 is not really using it.. so we are going to to the same.
_vifnCycle = new VIFn_Cycle(opcode.Immediate);
break;
case CmdMscal:
// opcode.Immediate needs to be used as execution address for the microprogram.
return(State.Microprogram);
case CmdMscnt:
// The difference with Mscal is that the execution address will be the
// most recent end of the previous microcode execution.
return(State.Microprogram);
case CmdStmask:
_vifnMask = new VIFn_Mask(ReadUInt32());
break;
case CmdStrow:
_vifnRow[0] = ReadUInt32();
_vifnRow[1] = ReadUInt32();
_vifnRow[2] = ReadUInt32();
_vifnRow[3] = ReadUInt32();
break;
case CmdStcol:
_vifnCol[0] = ReadUInt32();
_vifnCol[1] = ReadUInt32();
_vifnCol[2] = ReadUInt32();
_vifnCol[3] = ReadUInt32();
break;
default:
throw new Exception($"VIF1 cmd {opcode.Cmd:X02}@{_programCounter:X} not implemented!");
}
}
return(State.Run);
}
