public override eSuccessState ParseData(GSMParameters param, bool[] decodedBurst, int sequence)
{
if (IsDummy(decodedBurst))
{
/* this may happen with dumps that do not contain SCH/BCCH anymore. simply accept it. */
return(eSuccessState.Unknown);
}
Array.Copy(decodedBurst, 3, SCHData, 0, 39);
Array.Copy(decodedBurst, 106, SCHData, 39, 39);
if (Deconvolution() == eCorrectionResult.Failed)
{
ErrorMessage = "(Error in ConvolutionalCoder)";
return(eSuccessState.Failed);
}
bool[] crc = CRC.Calc(SCHDataDecoded, 0, 35, CRC.PolynomialSCH);
if (!CRC.Matches(crc))
{
ErrorMessage = "(Error in CRC)";
return(eSuccessState.Failed);
}
byte BSIC = (byte)ByteUtil.BitsToLongRev(SCHDataDecoded, 2, 6);
long T1 = ByteUtil.BitsToLongRev(SCHDataDecoded, new[] { new[] { 0, 2 }, new[] { 8, 8 }, new[] { 23, 1 } });
long T2 = ByteUtil.BitsToLongRev(SCHDataDecoded, 18, 5);
long T3M = ByteUtil.BitsToLongRev(SCHDataDecoded, new[] { new[] { 16, 2 }, new[] { 24, 1 } });
long T3 = (10 * T3M) + 1;
long FN;
if (T2 <= T3)
{
FN = 51 * ((T3 - T2) % 26) + T3 + 51 * 26 * T1;
}
else
{
FN = 51 * (26 - ((T2 - T3) % 26)) + T3 + 51 * 26 * T1;
}
if (param.FN != FN)
{
param.FN = FN;
}
param.TN = 0;
param.BSIC = BSIC;
if (DumpData)
{
StatusMessage =
"BSIC: " + String.Format("{0,3}", BSIC) +
" T1: " + String.Format("{0,5}", T1) +
" T2: " + String.Format("{0,3}", T2) +
" T3: " + String.Format("{0,3}", T3) +
" FN: " + String.Format("{0,8}", FN) +
" TrainOffs: " + String.Format("{0,3}", param.SampleOffset);
}
return(eSuccessState.Succeeded);
}
