std::vector<signed char> CreateQLutLossless(LONG cbit)
{
Presets preset = ComputeDefault((1 << cbit) - 1, 0);
LONG range = preset.MAXVAL + 1;
std::vector<signed char> lut;
lut.resize(range * 2);
for (LONG diff = -range; diff < range; diff++)
{
lut[range + diff] = QuantizeGratientOrg(preset, 0,diff);
}
return lut;
}
void JLSOutputStream::AddScan(const void* compareData, const JlsParameters* pparams)
{
if (pparams->jfif.Ver)
{
_segments.push_back(CreateJFIF(&pparams->jfif));
}
if (!IsDefault(&pparams->custom))
{
_segments.push_back(CreateLSE(&pparams->custom));
}
else if (pparams->bitspersample > 12)
{
JlsCustomParameters preset = ComputeDefault((1 << pparams->bitspersample) - 1, pparams->allowedlossyerror);
_segments.push_back(CreateLSE(&preset));
}
_icompLast += 1;
_segments.push_back(EncodeStartOfScan(pparams,pparams->ilv == ILV_NONE ? _icompLast : -1));
Size size = Size(pparams->width, pparams->height);
int ccomp = pparams->ilv == ILV_NONE ? 1 : pparams->components;
_segments.push_back(new JpegImageDataSegment(compareData, *pparams, _icompLast, ccomp));
}