/// <summary>
/// Gets the format info bits.
/// </summary>
/// <param name="errorlevel">The errorlevel.</param>
/// <param name="pattern">The pattern.</param>
/// <returns></returns>
/// <remarks></remarks>
private static BitList GetFormatInfoBits(ErrorCorrectionLevel errorlevel, Pattern pattern)
{
var formatInfo = (int)pattern.MaskPatternType;
//Pattern bits length = 3
formatInfo |= GetErrorCorrectionIndicatorBits(errorlevel) << 3;
int bchCode = BCHCalculator.CalculateBCH(formatInfo, s_FormatInfoPoly);
//bchCode length = 10
formatInfo = (formatInfo << 10) | bchCode;
//xor maskPattern
formatInfo ^= s_FormatInfoMaskPattern;
var resultBits = new BitList();
resultBits.Add(formatInfo, 15);
if (resultBits.Count != 15)
{
throw new Exception("FormatInfoBits length is not 15");
}
else
{
return(resultBits);
}
}
/// <summary>
/// Versions the info bit list.
/// </summary>
/// <param name="version">The version.</param>
/// <returns></returns>
/// <remarks></remarks>
private static BitList VersionInfoBitList(int version)
{
var result = new BitList();
result.Add(version, s_LengthDataBits);
result.Add(BCHCalculator.CalculateBCH(version, s_VersionBCHPoly), s_LengthECBits);
if (result.Count != (s_LengthECBits + s_LengthDataBits))
{
throw new Exception("Version Info creation error. Result is not 18 bits");
}
return(result);
}