private byte SelectPresentationContext(ClientAssociationParameters association, DicomFile file, out DicomMessage message)
{
byte pcid = 0;
message = new DicomMessage(file);
// If Lossy compressed & we have a matching context, send
// If we don't have a codec, just return
if (message.TransferSyntax.Encapsulated && message.TransferSyntax.LossyCompressed)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, message.TransferSyntax);
if (pcid != 0) return pcid;
if (DicomCodecRegistry.GetCodec(message.TransferSyntax) == null)
return 0;
}
// If the image is lossless compressed & we don't have a codec, send if we
// can as is.
if (message.TransferSyntax.Encapsulated && message.TransferSyntax.LosslessCompressed)
{
if (DicomCodecRegistry.GetCodec(message.TransferSyntax) == null)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, message.TransferSyntax);
return pcid;
}
}
// If lossless compressed & requesting lossless syntax, just send as is
if (message.TransferSyntax.Encapsulated
&& message.TransferSyntax.LosslessCompressed
&& ((_sendRequest.CompressionType == CompressionType.Rle
|| _sendRequest.CompressionType == CompressionType.JpegLossless
|| _sendRequest.CompressionType == CompressionType.J2KLossless)))
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, message.TransferSyntax);
if (pcid != 0) return pcid;
}
if (_sendRequest.CompressionType == CompressionType.Rle)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, TransferSyntax.RleLossless);
if (pcid != 0)
{
return pcid;
}
}
else if (_sendRequest.CompressionType == CompressionType.JpegLossless)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, TransferSyntax.JpegLosslessNonHierarchicalFirstOrderPredictionProcess14SelectionValue1);
if (pcid != 0)
{
return pcid;
}
}
else if (_sendRequest.CompressionType == CompressionType.J2KLossless)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, TransferSyntax.Jpeg2000ImageCompressionLosslessOnly);
if (pcid != 0)
{
return pcid;
}
}
else if (_sendRequest.CompressionType == CompressionType.J2KLossy)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass, TransferSyntax.Jpeg2000ImageCompression);
if (pcid != 0)
{
var doc = new XmlDocument();
XmlElement element = doc.CreateElement("compress");
doc.AppendChild(element);
XmlAttribute syntaxAttribute = doc.CreateAttribute("syntax");
syntaxAttribute.Value = TransferSyntax.Jpeg2000ImageCompressionUid;
element.Attributes.Append(syntaxAttribute);
decimal ratio = 100.0m / _sendRequest.CompressionLevel;
XmlAttribute ratioAttribute = doc.CreateAttribute("ratio");
ratioAttribute.Value = ratio.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(ratioAttribute);
syntaxAttribute = doc.CreateAttribute("convertFromPalette");
syntaxAttribute.Value = true.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(syntaxAttribute);
IDicomCodecFactory[] codecs = DicomCodecRegistry.GetCodecFactories();
foreach (IDicomCodecFactory codec in codecs)
if (codec.CodecTransferSyntax.Equals(TransferSyntax.Jpeg2000ImageCompression))
{
try
{
if (message.TransferSyntax.Encapsulated)
{
message.ChangeTransferSyntax(TransferSyntax.ExplicitVrLittleEndian);
message.TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
}
message.ChangeTransferSyntax(TransferSyntax.Jpeg2000ImageCompression,
codec.GetDicomCodec(),
codec.GetCodecParameters(doc));
message.TransferSyntax = TransferSyntax.Jpeg2000ImageCompression;
return pcid;
}
catch (Exception e)
{
Platform.Log(LogLevel.Warn, e, "Unexpected exception changing transfer syntax to {0}.",
TransferSyntax.Jpeg2000ImageCompression.Name);
}
}
}
}
else if (_sendRequest.CompressionType == CompressionType.JpegLossy)
{
var iod = new ImagePixelMacroIod(message.DataSet);
if (iod.BitsStored == 8)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass,
TransferSyntax.JpegBaselineProcess1);
if (pcid != 0)
{
var doc = new XmlDocument();
XmlElement element = doc.CreateElement("compress");
doc.AppendChild(element);
XmlAttribute syntaxAttribute = doc.CreateAttribute("syntax");
syntaxAttribute.Value = TransferSyntax.JpegBaselineProcess1Uid;
element.Attributes.Append(syntaxAttribute);
syntaxAttribute = doc.CreateAttribute("quality");
syntaxAttribute.Value = _sendRequest.CompressionLevel.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(syntaxAttribute);
syntaxAttribute = doc.CreateAttribute("convertFromPalette");
syntaxAttribute.Value = true.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(syntaxAttribute);
IDicomCodecFactory[] codecs = DicomCodecRegistry.GetCodecFactories();
foreach (IDicomCodecFactory codec in codecs)
if (codec.CodecTransferSyntax.Equals(TransferSyntax.JpegBaselineProcess1))
{
try
{
if (message.TransferSyntax.Encapsulated)
{
message.ChangeTransferSyntax(TransferSyntax.ExplicitVrLittleEndian);
message.TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
}
message.ChangeTransferSyntax(TransferSyntax.JpegBaselineProcess1,
codec.GetDicomCodec(),
codec.GetCodecParameters(doc));
message.TransferSyntax = TransferSyntax.JpegBaselineProcess1;
return pcid;
}
catch (Exception e)
{
Platform.Log(LogLevel.Warn, e,
"Unexpected exception changing transfer syntax to {0}.",
TransferSyntax.JpegBaselineProcess1.Name);
}
}
}
}
else if (iod.BitsStored == 12)
{
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass,
TransferSyntax.JpegExtendedProcess24);
if (pcid != 0)
{
var doc = new XmlDocument();
XmlElement element = doc.CreateElement("compress");
doc.AppendChild(element);
XmlAttribute syntaxAttribute = doc.CreateAttribute("syntax");
syntaxAttribute.Value = TransferSyntax.JpegExtendedProcess24Uid;
element.Attributes.Append(syntaxAttribute);
syntaxAttribute = doc.CreateAttribute("quality");
syntaxAttribute.Value = _sendRequest.CompressionLevel.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(syntaxAttribute);
syntaxAttribute = doc.CreateAttribute("convertFromPalette");
syntaxAttribute.Value = true.ToString(CultureInfo.InvariantCulture);
element.Attributes.Append(syntaxAttribute);
IDicomCodecFactory[] codecs = DicomCodecRegistry.GetCodecFactories();
foreach (IDicomCodecFactory codec in codecs)
if (codec.CodecTransferSyntax.Equals(TransferSyntax.JpegExtendedProcess24))
{
try
{
if (message.TransferSyntax.Encapsulated)
{
message.ChangeTransferSyntax(TransferSyntax.ExplicitVrLittleEndian);
message.TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
}
message.ChangeTransferSyntax(TransferSyntax.JpegExtendedProcess24,
codec.GetDicomCodec(),
codec.GetCodecParameters(doc));
message.TransferSyntax = TransferSyntax.JpegExtendedProcess24;
return pcid;
}
catch (Exception e)
{
Platform.Log(LogLevel.Warn, e,
"Unexpected exception changing transfer syntax to {0}.",
TransferSyntax.JpegExtendedProcess24.Name);
}
}
}
}
}
if (pcid == 0)
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass,
TransferSyntax.ExplicitVrLittleEndian);
if (pcid == 0)
pcid = association.FindAbstractSyntaxWithTransferSyntax(message.SopClass,
TransferSyntax.ImplicitVrLittleEndian);
return pcid;
}
