/// <summary>
/// Function to encode data in this section.
/// </summary>
/// <param name="data">Rhythm data to encode</param>
/// <param name="tables">Huffman table to use during enconding</param>
/// <param name="medianLength">contains length of median data in msec</param>
/// <param name="difference">difference to use durring decoding</param>
/// <returns>0 on succes</returns>
public int EncodeData(short[][] data, SCPSection2 tables, ushort medianLength, byte difference)
{
if ((tables != null) &&
(data != null))
{
ushort nrleads = (ushort)data.Length;
_Data = new byte[nrleads][];
_DataLength = new ushort[nrleads];
for (int loper = 0; loper < nrleads; loper++)
{
if (data[loper] == null)
{
return(2);
}
_Difference = difference;
_Data[loper] = tables.Encode(data[loper], medianLength, 0, _Difference);
if (_Data[loper] == null)
{
_Data = null;
_DataLength = null;
return(4);
}
_DataLength[loper] = (ushort)_Data[loper].Length;
if ((_DataLength[loper] & 0x1) == 0x1)
{
_DataLength[loper]++;
}
}
return(0);
}
return(1);
}
/// <summary>
/// Function to encode data in this section.
/// </summary>
/// <param name="data">Rhythm data to encode</param>
/// <param name="tables">Huffman table to use during enconding</param>
/// <param name="leadDefinition">Lead Definitions to use for encoding</param>
/// <param name="difference">difference to use durring decoding</param>
/// <returns>0 on succes</returns>
public int EncodeData(short[][] data, SCPSection2 tables, SCPSection3 leadDefinition, SCPSection4 qrsLocations, int medianFreq, byte difference)
{
int localFreq = getSamplesPerSecond();
if ((data != null) &&
(tables != null) &&
(leadDefinition != null) &&
(localFreq > 0))
{
if ((medianFreq <= 0) ||
(medianFreq == localFreq))
{
medianFreq = 1;
localFreq = 1;
}
if ((_Bimodal == 0x1) &&
(qrsLocations == null))
{
return(2);
}
ushort nrleads = leadDefinition.getNrLeads();
_Data = new byte[nrleads][];
_DataLength = new ushort[nrleads];
for (int loper = 0; loper < nrleads; loper++)
{
if (data[loper] == null)
{
return(4);
}
short[] temp = data[loper];
int time = (leadDefinition.getLeadLength(loper) * localFreq) / medianFreq;
if (localFreq != medianFreq)
{
int rate = (medianFreq / localFreq);
// Bimodal part might be buggy unable to test.
if ((_Bimodal == 0x1) &&
((medianFreq % localFreq) == 0) &&
(rate > 0) &&
(rate < 5))
{
// Calculate nr of samples stored in section.
time = 0;
int nrzones = qrsLocations.getNrProtectedZones();
for (int zone = 0; zone < nrzones; zone++)
{
int begin = (qrsLocations.getProtectedStart(zone) >= leadDefinition.getLeadStart(loper) ? qrsLocations.getProtectedStart(zone) : leadDefinition.getLeadStart(loper));
int end = (qrsLocations.getProtectedEnd(zone) <= leadDefinition.getLeadEnd(loper) ? qrsLocations.getProtectedEnd(zone) : leadDefinition.getLeadEnd(loper));
begin = (end > begin ? end - begin + 1 : 0);
time += begin + (rate - (begin % rate));
}
time += ((leadDefinition.getLeadLength(loper) - time) * localFreq) / medianFreq;
int leadLength = leadDefinition.getLeadLength(loper);
time += ((leadLength - time) * localFreq) / medianFreq;
// Restructure bimodal data to length set in Section3.
temp = new short[time];
int time2Offset = leadDefinition.getLeadStart(loper);
int time1 = 0;
int time2 = 0;
while ((time1 < temp.Length) &&
(time2 <= leadLength) &&
(time2 < data[loper].Length))
{
int zone = 0;
int end = qrsLocations.getNrProtectedZones();
for (; zone < end; zone++)
{
if ((qrsLocations.getProtectedLength(zone) > 0) &&
(time2 + time2Offset >= qrsLocations.getProtectedStart(zone)) &&
(time2 + time2Offset <= qrsLocations.getProtectedEnd(zone)))
{
break;
}
}
if (zone < end)
{
temp[time1] = data[loper][time2++];
}
else
{
int Sum = 0;
for (int sumLoper = 0; sumLoper < rate; sumLoper++)
{
Sum += data[loper][time2 + sumLoper];
}
temp[time1] = (short)(Sum / rate);
time2 += rate;
}
time1++;
}
}
else
{
_Bimodal = 0;
ECGTool.ResampleLead(temp, medianFreq, localFreq, out temp);
}
}
_Difference = difference;
_Data[loper] = tables.Encode(temp, time, 0, _Difference);
if (_Data[loper] == null)
{
_Data = null;
_DataLength = null;
return(8);
}
_DataLength[loper] = (ushort)_Data[loper].Length;
if ((_DataLength[loper] & 0x1) == 0x1)
{
_DataLength[loper]++;
}
}
return(0);
}
return(1);
}