public static DcCategoryEncodedPair CalculateDifferenceDc(ColorChannel channel, int i)
{
int result = (int)channel.GetBlock(i)[0, 0];
if (i != 0)
{
result = (int)channel.GetBlock(i)[0, 0] - (int)channel.GetBlock(i - 1)[0, 0];
}
return(new DcCategoryEncodedPair(AbstractCategoryEncodedPair.CalculateCategory(result),
AbstractCategoryEncodedPair.EncodeCategory(result)));
}
public static List <AcCategoryEncodedPair> EncodeCategoriesAc(
IEnumerable <AcRunlengthEncodedPair> acRunLengthEncodedPairs)
{
List <AcCategoryEncodedPair> resultList = new List <AcCategoryEncodedPair>();
foreach (AcRunlengthEncodedPair acRunLengthEncodedPair in acRunLengthEncodedPairs)
{
int category = AbstractCategoryEncodedPair.CalculateCategory(acRunLengthEncodedPair.GetEntry());
int pair = (acRunLengthEncodedPair.GetZeroCount() << 4) +
category;
int categoryEncoded = AbstractCategoryEncodedPair.EncodeCategory(acRunLengthEncodedPair.GetEntry());
resultList.Add(new AcCategoryEncodedPair(pair, categoryEncoded));
}
return(resultList);
}