public void readTraceData(Byte[] buffer, IList <Trace> traceList, BinaryFileHeader binTemp)
{
//for loop that runs the amount of channels in the file
for (int i = 0; i < binTemp.numDataTraces; i++)
{
Trace temp = new Trace(); //instantiates a new class every time there's a new channel
if (i == 0)
{
//240 is the size of a trace header, only read one trace header then skip over the rest
start = (binTemp.extendedTextualFileHeaderEnd + (240));
stop = ((binTemp.extendedTextualFileHeaderEnd + (240)) + (binTemp.numSampsPerTrace * 4));
//Debug.WriteLine("START INDEX: " + start);
//Debug.WriteLine("END INDEX: " + stop);
temp.determineTraceData(buffer, start, stop, binTemp);
traceList.Add(temp);
}
else
{
start = stop + 240;
stop = start + ((binTemp.numSampsPerTrace * 4));
//Debug.WriteLine("START INDEX: " + start);
//Debug.WriteLine("END INDEX: " + stop);
temp.determineTraceData(buffer, start, stop, binTemp);
traceList.Add(temp);
}
}
}
public void determineTraceData(Byte[] buffer, int start, int stop, BinaryFileHeader binTemp)
{
Amplitudes amplitudeReader = null;
switch (binTemp.measurementUnit)
{
case 0x1:
amplitudeReader = new Amp4ByteIBMFloating();
break;
case 0x2:
amplitudeReader = new Amp4Byte2sComp();
break;
case 0x3:
amplitudeReader = new Amp2Byte2sComp();
break;
case 0x4:
Debug.WriteLine("OBSOLETE FIXED POINT WITH GAIN FORMAT. NOT SUPPORTED");
break;
case 0x5:
amplitudeReader = new Amp4ByteIEEEFloating();
break;
case 0x6:
Debug.WriteLine("NOT CURRENTLY USED");
break;
case 0x7:
Debug.WriteLine("NOT CURRENTLY USED");
break;
case 0x8:
amplitudeReader = new Amp1Byte2sComp();
break;
}
amplitudes = amplitudeReader.ReadData(buffer, start, stop); //calls the Abstract class Amplitudes() that will determine how to read the Trace amplitudes
Debug.WriteLine("List Size: " + amplitudes.Count());
}
} // end of flipBits()
public void readTraceHeaders(Byte[] buffer, BinaryFileHeader temp)
{
if (buffer.Count() <= 0)
{
Debug.WriteLine("Buffer is empty.");
return;
}
//Debug.WriteLine("Beginning Bit Location of Trace Header 1: " + temp.extendedTextualFileHeaderEnd);
this.traceSeqNumLine = BitConverter.ToUInt32(buffer, temp.extendedTextualFileHeaderEnd);
this.ogFieldRecordNum = BitConverter.ToUInt32(buffer, temp.extendedTextualFileHeaderEnd + 9);
this.traceNumOGField = BitConverter.ToUInt32(buffer, temp.extendedTextualFileHeaderEnd + 13);
this.traceIDCode = BitConverter.ToUInt16(buffer, temp.extendedTextualFileHeaderEnd + 29);
this.numSampsTrace = BitConverter.ToUInt16(buffer, temp.extendedTextualFileHeaderEnd + 115);
this.sampIntMicro = BitConverter.ToUInt16(buffer, temp.extendedTextualFileHeaderEnd + 117);
Debug.WriteLine("*--------------------START OF ANALYSIS OF TRACE HEADER--------------------*");
Debug.WriteLine("Trace sequence number within line: " + traceSeqNumLine);
Debug.WriteLine("Original field record number: " + ogFieldRecordNum);
Debug.WriteLine("Trace number within the original field record: " + traceNumOGField);
Debug.WriteLine("Trace ID Code: " + traceIDCode);
if (traceIDCode == 1)
{
Debug.WriteLine("Trace ID says that this file contains seismic data");
}
else
{
Debug.WriteLine("This file doesn't contain seismic data according to the trace ID code.");
}
Debug.WriteLine("*--------------------END OF ANALYSIS OF TRACE HEADER--------------------*");
}
public SEGYU()
{
binaryFileHeader = new BinaryFileHeader();
trace = new Trace();
}