/// <summary>
/// Write DICOM file meta information.
/// </summary>
/// <param name="target">Byte target subject to writing.</param>
/// <param name="fileMetaInfo">File meta information.</param>
/// <param name="options">Writer options.</param>
private static Task WriteFileMetaInfoAsync(
IByteTarget target,
DicomDataset fileMetaInfo,
DicomWriteOptions options)
{
// recalculate FMI group length as required by standard
fileMetaInfo.RecalculateGroupLengths();
var writer = new DicomWriter(DicomTransferSyntax.ExplicitVRLittleEndian, options, target);
var walker = new DicomDatasetWalker(fileMetaInfo);
return(walker.WalkAsync(writer));
}
/// <summary>
/// If necessary, update dataset syntax and group lengths.
/// </summary>
/// <param name="syntax">Transfer syntax.</param>
/// <param name="dataset">DICOM dataset.</param>
/// <param name="options">Writer options.</param>
private static void UpdateDatasetGroupLengths(
DicomTransferSyntax syntax,
DicomDataset dataset,
DicomWriteOptions options)
{
if (options.KeepGroupLengths)
{
// update transfer syntax and recalculate existing group lengths
dataset.InternalTransferSyntax = syntax;
dataset.RecalculateGroupLengths(false);
}
else
{
// remove group lengths as suggested in PS 3.5 7.2
//
// 2. It is recommended that Group Length elements be removed during storage or transfer
// in order to avoid the risk of inconsistencies arising during coercion of data
// element values and changes in transfer syntax.
dataset.RemoveGroupLengths();
}
}
/// <summary>
/// Initializes an instance of a <see cref="DicomFileWriter"/>.
/// </summary>
/// <param name="options">Writer options.</param>
public DicomFileWriter(DicomWriteOptions options)
{
_options = options ?? DicomWriteOptions.Default;
}
public DicomWriteLengthCalculator(DicomTransferSyntax syntax, DicomWriteOptions options)
{
_syntax = syntax;
_options = options;
}
/// <summary>
/// Initializes an instance of <see cref="DicomWriter"/>.
/// </summary>
/// <param name="syntax">Writer transfer syntax.</param>
/// <param name="options">Writer options.</param>
/// <param name="target">Target to which to write the DICOM object.</param>
public DicomWriter(DicomTransferSyntax syntax, DicomWriteOptions options, IByteTarget target)
{
Syntax = syntax;
_options = options ?? DicomWriteOptions.Default;
_target = target;
}
