public List <byte> Decode()
{
var encodedModel = new EncodedModel(_encodedBytes);
var mtfBytes = encodedModel.Bytes;
if (encodedModel.IsUnary)
{
var unaryModel = new UnaryModel(encodedModel.Frequencies, encodedModel.Bytes);
var unaryCoder = new UnaryCoder();
mtfBytes = unaryCoder.Decode(unaryModel);
}
var mtfCoder = new MtfCoder();
var bwtBytes = mtfCoder.Decode(mtfBytes);
var bwtModel = new BwtModel(encodedModel.OriginalIndex, bwtBytes);
var bwtCoder = new BwtCoder();
var rleBytes = bwtCoder.Decode(bwtModel);
if (encodedModel.IsRle)
{
var rleCoder = new RleCoder();
_decodedBytes = rleCoder.Decode(rleBytes);
}
else
{
_decodedBytes = rleBytes;
}
return(_decodedBytes);
}
public List <byte> Encode()
{
var isRle = false;
var nextBytes = _originalBytes;
var rleCoder = new RleCoder();
var rleBytes = rleCoder.Encode(_originalBytes);
if (rleBytes.Count < _originalBytes.Count)
{
nextBytes = rleBytes;
isRle = true;
}
var bwtCoder = new BwtCoder();
var bwtModel = bwtCoder.Encode(nextBytes);
var mtfCoder = new MtfCoder();
var mtfBytes = mtfCoder.Encode(bwtModel.Bytes);
var unaryCoder = new UnaryCoder();
var unaryModel = unaryCoder.Encode(mtfBytes);
if (unaryModel.Bytes.Count < mtfBytes.Count)
{
var encodedModel = new EncodedModel(isRle, true, bwtModel.OriginalIndex, unaryModel.Frequencies, unaryModel.Bytes);
_encodedBytes = encodedModel.ToByteList();
}
else
{
var encodedModel = new EncodedModel(isRle, false, bwtModel.OriginalIndex, null, mtfBytes);
_encodedBytes = encodedModel.ToByteList();
}
return(_encodedBytes);
}