public void Dispose()
{
ABFFIO.ABF_Close(fileHandle, ref errorCode);
if (errorCode != 0)
{
throw new ArgumentException($"ABFFIO failed to close ABF");
}
}
public ABF(string path)
{
Path = System.IO.Path.GetFullPath(path);
if (!System.IO.File.Exists(path))
{
throw new ArgumentException($"file does not exist: {path}");
}
uint loadFlags = 0;
SweepCount = 0;
SweepPointCount = 0;
header = new ABFFIO.ABFFileHeader();
ABFFIO.ABF_ReadOpen(Path, ref fileHandle, loadFlags, ref header, ref SweepPointCount, ref SweepCount, ref errorCode);
if (errorCode != 0)
{
throw new ArgumentException($"ABFFIO failed to load ABF and read its header");
}
sweepBuffer = new float[SweepPointCount];
// store useful ABF information at the class level
SampleRate = (int)(1e6 / header.fADCSequenceInterval / header.nADCNumChannels);
SweepStartTimes = new double[SweepCount];
if (header.fSynchTimeUnit > 0)
{
// fixed-length sweeps
int sweepPointCount = header.lActualAcqLength / header.lActualEpisodes / header.nADCNumChannels;
for (int i = 0; i < SweepCount; i++)
{
SweepStartTimes[i] = (double)(sweepPointCount * i) / SampleRate;
}
}
else
{
// variable length sweeps
for (int i = 0; i < SweepCount; i++)
{
int sweepNumber = i + 1;
Int32 syncCount = 0;
ABFFIO.ABF_SynchCountFromEpisode(fileHandle, ref header, sweepNumber, ref syncCount, ref errorCode);
if (errorCode != 0)
{
throw new ArgumentException($"ABFFIO failed to determine sweep time");
}
SweepStartTimes[i] = (double)syncCount / SampleRate;
}
}
}
public float[] GetSweep(int sweepIndex = 1, int channelNumber = 0)
{
int physicalChannel = header.nADCSamplingSeq[channelNumber];
uint thisSweepPointCount = 0;
ABFFIO.ABF_ReadChannel(fileHandle, ref header, physicalChannel, sweepIndex + 1, ref sweepBuffer[0], ref thisSweepPointCount, ref errorCode);
if (errorCode != 0)
{
throw new ArgumentException($"ABFFIO failed to read channel {channelNumber} sweep {sweepIndex}");
}
float[] thisSweep = new float[thisSweepPointCount];
Array.Copy(sweepBuffer, 0, thisSweep, 0, thisSweepPointCount);
return(thisSweep);
}
