public static byte[] Encode(SpectrumCollection collection)
{
var spc = _ToSpcFile(collection);
var ms = new MemoryStream();
var logOffset = Constants.HEADER_LENGTH;
using (var bw = new BinaryWriter(ms))
{
var bb = spc.SubFiles.SelectMany(file => _EncodeSubFile(spc.Header, file)).ToArray();
var fileType = spc.Header.FileType;
if (fileType.HasFlag(FileType.XYFile) && !fileType.HasFlag(FileType.OwnXArray))
{
bb = spc.SubFiles[0].XValues.SelectMany(d => BitConverter.GetBytes((float)d)).Concat(bb).ToArray();
}
logOffset += bb.Length;
if (spc.LogBlock != LogBlock.Empty)
{
spc.Header.ByteOffsetToLogBlock = logOffset;
}
bw.Write(_EncodeHeader(spc.Header));
bw.Write(bb);
if (spc.LogBlock != LogBlock.Empty)
{
bw.Write(LogBlockWriter.Encode(spc.LogBlock));
}
return(ms.ToArray());
}
}
private static SpcFile _ToSpcFile(SpectrumCollection collection)
{
var spectra = collection.Spectra;
var fileType = (spectra.Length == 1 && spectra[0].IsXEvenSpaced)
? FileType.SingleFileEvenlySpacedXValues
: (FileType.Multifile | FileType.XYFile | FileType.OwnXArray);
if (spectra.Length > 1 && spectra[0].IsXEvenSpaced && _HaveSameXAxes(spectra))
{
fileType = FileType.Multifile;
}
if (spectra.Length > 1 && !spectra[0].IsXEvenSpaced && _HaveSameXAxes(spectra))
{
fileType = FileType.Multifile | FileType.XYFile;
}
return(new SpcFile
{
Header = new Header
{
NumberOfPointsInFile = spectra[0].Y.Length,
NumberOfSubfiles = spectra.Length,
FileType = fileType,
Memo = collection.Memo,
ExponentForYValues = 0x80,
XUnitsTypeCode = collection.XUnit.Code,
YUnitsTypeCode = collection.YUnit.Code,
FirstXCoordinate = spectra[0].X[0],
LastXCoordinate = spectra[0].X[spectra[0].Length - 1]
},
SubFiles = spectra.Select((spectrum, i) => new SubFile
{
Header = new SubHeader
{
NumberOfPoints = spectrum.Length,
IndexNumber = (short)i
},
XValues = spectrum.X,
YValues = spectrum.Y
}).ToArray(),
LogBlock = collection.MetaData == null ? LogBlock.Empty : new LogBlock(collection.MetaData)
});
}
public static void ToFile(SpectrumCollection collection, string file)
{
var bytes = Encode(collection);
File.WriteAllBytes(file, bytes);
}
public static void ToStream(SpectrumCollection collection, Stream stream)
{
var bytes = Encode(collection);
stream.Write(bytes, 0, bytes.Length);
}
