/// <summary>
/// Loads the DICOM file and changes the transfer syntax if needed. (Internal)
/// </summary>
/// <param name="client">C-Store Client</param>
public void Load(CStoreClient client)
{
if (_loaded)
{
return;
}
try {
DicomTransferSyntax tx = null;
foreach (DcmPresContext pc in client.Associate.GetPresentationContexts())
{
if (pc.Result == DcmPresContextResult.Accept && pc.AbstractSyntax == _sopClass)
{
tx = pc.AcceptedTransferSyntax;
break;
}
}
if (tx == null)
{
throw new DicomNetworkException("No accepted presentation contexts for abstract syntax: " + _sopClass.Description);
}
// Possible to stream from file?
if (!client.DisableFileStreaming && tx == TransferSyntax)
{
using (FileStream fs = DicomFileFormat.GetDatasetStream(_fileName)) {
_datasetSize = Convert.ToUInt32(fs.Length - fs.Position);
fs.Close();
}
return;
}
DcmCodecParameters codecParams = null;
if (tx == client.PreferredTransferSyntax)
{
codecParams = client.PreferredTransferSyntaxParams;
}
DicomFileFormat ff = new DicomFileFormat();
ff.Load(FileName, DicomReadOptions.DefaultWithoutDeferredLoading);
if (_originalTransferSyntax != tx)
{
if (_originalTransferSyntax.IsEncapsulated)
{
// Dataset is compressed... decompress
try {
ff.ChangeTransferSytnax(DicomTransferSyntax.ExplicitVRLittleEndian, null);
}
catch {
client.Log.Error("{0} -> Unable to change transfer syntax:\n\tclass: {1}\n\told: {2}\n\tnew: {3}\n\treason: {4}\n\tcodecs: {5} - {6}",
client.LogID, SOPClassUID.Description, _originalTransferSyntax, DicomTransferSyntax.ExplicitVRLittleEndian,
#if DEBUG
HasError ? "Unknown" : Error.ToString(),
#else
HasError ? "Unknown" : Error.Message,
#endif
DicomCodec.HasCodec(_originalTransferSyntax), DicomCodec.HasCodec(DicomTransferSyntax.ExplicitVRLittleEndian));
throw;
}
}
if (tx.IsEncapsulated)
{
// Dataset needs to be compressed
try {
ff.ChangeTransferSytnax(tx, codecParams);
}
catch {
client.Log.Error("{0} -> Unable to change transfer syntax:\n\tclass: {1}\n\told: {2}\n\tnew: {3}\n\treason: {4}\n\tcodecs: {5} - {6}",
client.LogID, SOPClassUID.Description, ff.Dataset.InternalTransferSyntax, tx,
#if DEBUG
HasError ? "Unknown" : Error.ToString(),
#else
HasError ? "Unknown" : Error.Message,
#endif
DicomCodec.HasCodec(ff.Dataset.InternalTransferSyntax), DicomCodec.HasCodec(tx));
throw;
}
}
}
_dataset = ff.Dataset;
_datasetSize = _dataset.CalculateWriteLength(tx, DicomWriteOptions.Default);
_transferSyntax = tx;
}
catch (Exception e) {
_dataset = null;
_transferSyntax = _originalTransferSyntax;
_status = DcmStatus.ProcessingFailure;
_exception = e;
}
finally {
_loaded = true;
}
}