public int[] ReadValues(long bitsToRead, IBitReader bitReader)
{
var arrayLength = bitReader.ReadNBits(32);
var values = new List <int>();
var encodedValue = new TableEncodedValue();
for (int i = 0; i < arrayLength; i++)
{
int numberOf1Before0 = 0;
while (bitReader.ReadNBits(1) != 0)
{
numberOf1Before0++;
}
if (numberOf1Before0 == 0)
{
values.Add(0);
}
else
{
encodedValue.NumberOf1Before0 = numberOf1Before0;
encodedValue.ValueAfter0 = (int)bitReader.ReadNBits(numberOf1Before0);
values.Add(TableValueEncoding.DecodeValue(encodedValue));
}
}
return(values.ToArray());
}
public static int DecodeValue(TableEncodedValue encodedValue)
{
int xLeftLimit = -((int)Math.Pow(2, encodedValue.NumberOf1Before0) - 1);
if (xLeftLimit + encodedValue.ValueAfter0 >= xLeftLimit / 2)
{
return(encodedValue.ValueAfter0);
}
return(xLeftLimit + encodedValue.ValueAfter0);
}
public static TableEncodedValue EncodeValue(int value)
{
var encodedValue = new TableEncodedValue();
if (value == 0)
{
return(encodedValue);
}
encodedValue.NumberOf1Before0 = (int)Math.Log(Math.Abs(value), 2) + 1;
if (value < 0)
{
int xLimit = (int)Math.Pow(2, encodedValue.NumberOf1Before0) - 1;
encodedValue.ValueAfter0 = value + xLimit;
}
else
{
encodedValue.ValueAfter0 = value;
}
return(encodedValue);
}
