private void EncodeData(uint data, int dataBitsCount)
{
if (dataBitsCount <= 0)
{
throw new ArgumentException("Can't encode data whose bit length is less than or equal to 0",
"dataBitsCount");
}
byte temp = 0;
// when the data's bit size is larger than 8 bits
// we will encode the data every 8 bits
while (dataBitsCount >= oneByteBitsCount)
{
remain = (remain << oneByteBitsCount) | (data >> (dataBitsCount - oneByteBitsCount));
dataBitsCount = dataBitsCount - oneByteBitsCount;
// data & the value whose form is like 00000111111
data = data & (uint)((1 << dataBitsCount) - 1);
temp = (byte)(remain >> remainBitsCount);
outputStream.WriteByte(temp);
// remain & the value whose form is like 00000111111
// this action will eliminate the bits which has been written to
// output stream
remain = remain & (uint)((1 << remainBitsCount) - 1);
}
// if there is un-encoded data, we write it to
// the "remain".
if (dataBitsCount > 0)
{
remain = (remain << dataBitsCount) | data;
remainBitsCount += dataBitsCount;
}
// if the length of remain is larger than 8-bits after upper
// operation, we will write it to ouputstream one by one.
while (remainBitsCount >= oneByteBitsCount)
{
remainBitsCount -= oneByteBitsCount;
temp = (byte)(remain >> (remainBitsCount));
outputStream.WriteByte(temp);
// this action will eliminate the bits which has been written to
// output stream from remain
remain = remain & (uint)((1 << remainBitsCount) - 1);
}
}
