public JpegReadStatusInt ToInt()
{
var status = new JpegReadStatusInt();
status.Status = Status;
status.Result = Result;
return(status);
}
public static JpegReadStatusInt GetSuccess()
{
var status = new JpegReadStatusInt();
status.Status = Status.Success;
status.Result = 0;
return(status);
}
/// <summary>
/// Places n bits from the stream, where the most-significant bits
/// from the first byte read end up as the most-significant of the returned
/// n bits.
/// </summary>
/// <param name="n">Number of bits to return</param>
/// <returns>Integer containing the bits desired -- shifted all the way right.</returns>
public JpegReadStatusInt ReadBits(int n)
{
JpegReadStatusInt status = new JpegReadStatusInt();
int result = 0;
#region Special case -- included for optimization purposes
if (bitsLeft >= n)
{
bitsLeft -= n;
status.Result = bitBuffer >> (8 - n);
bitBuffer = (byte)(bitBuffer << n);
status.Status = Status.Success;
return(status);
}
#endregion
while (n > 0)
{
if (bitsLeft == 0)
{
var statusByte = ReadJpegByte();
status = statusByte.ToInt();
if (status.Status != Status.Success)
{
return(status); // We reached the end of the file, or found a marker.
}
bitBuffer = statusByte.Result;
bitsLeft = 8;
}
int take = n <= bitsLeft ? n : bitsLeft;
result = result | ((bitBuffer >> 8 - take) << (n - take));
bitBuffer = (byte)(bitBuffer << take);
bitsLeft -= take;
n -= take;
}
status.Result = result;
return(status);
}
){kind=link}
){kind=link}