public DicomCompressCommand(DicomMessageBase file, TransferSyntax syntax, IDicomCodec codec, DicomCodecParameters parms)
: base("DICOM Compress Command", true)
{
_file = file;
_syntax = syntax;
_codec = codec;
_parms = parms;
}
public DicomCompressCommand(DicomMessageBase file, XmlDocument parms)
: base("DICOM Compress Command", true)
{
_file = file;
XmlElement element = parms.DocumentElement;
string syntax = element.Attributes["syntax"].Value;
_syntax = TransferSyntax.GetTransferSyntax(syntax);
if (_syntax == null)
{
string failureDescription =
String.Format("Invalid transfer syntax in compression command: {0}", element.Attributes["syntax"].Value);
Platform.Log(LogLevel.Error, "Error with input syntax: {0}", failureDescription);
throw new DicomCodecException(failureDescription);
}
IDicomCodecFactory[] codecs = DicomCodecRegistry.GetCodecFactories();
IDicomCodecFactory theCodecFactory = null;
foreach (IDicomCodecFactory codec in codecs)
if (codec.CodecTransferSyntax.Equals(_syntax))
{
theCodecFactory = codec;
break;
}
if (theCodecFactory == null)
{
string failureDescription = String.Format("Unable to find codec for compression: {0}", _syntax.Name);
Platform.Log(LogLevel.Error, "Error with compression input parameters: {0}", failureDescription);
throw new DicomCodecException(failureDescription);
}
_codec = theCodecFactory.GetDicomCodec();
_parms = theCodecFactory.GetCodecParameters(parms);
}
/// <summary>
/// Method to send a DICOM C-STORE-RQ message.
/// </summary>
/// <param name="presentationID"></param>
/// <param name="messageID"></param>
/// <param name="priority"></param>
/// <param name="moveAE"></param>
/// <param name="moveMessageID"></param>
/// <param name="message"></param>
/// <param name="overrideParameters"></param>
public void SendCStoreRequest(byte presentationID, ushort messageID,
DicomPriority priority, string moveAE, ushort moveMessageID, DicomMessage message,
DicomCodecParameters overrideParameters)
{
DicomUid affectedClass = _assoc.GetAbstractSyntax(presentationID);
if (!affectedClass.UID.Equals(message.SopClass.Uid))
throw new DicomException(
String.Format(
"SOP Class Uid in the message {0} does not match SOP Class UID for presentation context {1}",
message.SopClass.Uid, affectedClass.UID));
DicomAttributeCollection command = message.MetaInfo;
message.MessageId = messageID;
message.CommandField = DicomCommandField.CStoreRequest;
message.AffectedSopClassUid = message.SopClass.Uid;
message.DataSetType = 0x0202;
message.Priority = priority;
String sopInstanceUid;
bool ok = message.DataSet[DicomTags.SopInstanceUid].TryGetString(0, out sopInstanceUid);
if (!ok)
throw new DicomException("SOP Instance UID unexpectedly not set in CStore Message being sent.");
message.AffectedSopInstanceUid = sopInstanceUid;
if (!string.IsNullOrEmpty(moveAE))
{
message.MoveOriginatorApplicationEntityTitle = moveAE;
message.MoveOriginatorMessageId = moveMessageID;
}
// Handle compress/decompress if necessary
TransferSyntax contextSyntax = _assoc.GetAcceptedTransferSyntax(presentationID);
if ((contextSyntax != message.TransferSyntax)
&& (contextSyntax.Encapsulated || message.TransferSyntax.Encapsulated))
{
if (overrideParameters != null)
message.ChangeTransferSyntax(contextSyntax, null, overrideParameters);
else
message.ChangeTransferSyntax(contextSyntax);
}
SendDimse(presentationID, command, message.DataSet);
}
/// <summary>
/// Method to send a DICOM C-STORE-RQ message.
/// </summary>
/// <param name="presentationID"></param>
/// <param name="messageID"></param>
/// <param name="priority"></param>
/// <param name="message"></param>
/// <param name="overrideParameters"></param>
public void SendCStoreRequest(byte presentationID, ushort messageID,
DicomPriority priority, DicomMessage message,
DicomCodecParameters overrideParameters)
{
SendCStoreRequest(presentationID, messageID, priority, null, 0, message, overrideParameters);
}
public void ChangeTransferSyntax(TransferSyntax newTransferSyntax, IDicomCodec inputCodec, DicomCodecParameters inputParameters)
{
IDicomCodec codec = inputCodec;
DicomCodecParameters parameters = inputParameters;
if (newTransferSyntax.Encapsulated && TransferSyntax.Encapsulated)
throw new DicomCodecException("Source and destination transfer syntaxes encapsulated");
if (newTransferSyntax.Encapsulated)
{
if (codec == null)
{
codec = DicomCodecRegistry.GetCodec(newTransferSyntax);
if (codec == null)
{
Platform.Log(LogLevel.Error, "Unable to get registered codec for {0}", newTransferSyntax);
throw new DicomCodecException("No registered codec for: " + newTransferSyntax.Name);
}
}
if (parameters == null)
parameters = DicomCodecRegistry.GetCodecParameters(newTransferSyntax, DataSet);
DicomAttribute pixelData;
if (DataSet.TryGetAttribute(DicomTags.PixelData, out pixelData))
{
if (pixelData.IsNull)
throw new DicomCodecException("Sop pixel data has no valid value and cannot be compressed.");
new OverlayPlaneModuleIod(DataSet).ExtractEmbeddedOverlays();
var pd = new DicomUncompressedPixelData(DataSet);
using (var pixelStream = ((DicomAttributeBinary) pixelData).AsStream())
{
//Before compression, make the pixel data more "typical", so it's harder to mess up the codecs.
//NOTE: Could combine mask and align into one method so we're not iterating twice, but I prefer having the methods separate.
if (DicomUncompressedPixelData.RightAlign(pixelStream, pd.BitsAllocated, pd.BitsStored, pd.HighBit))
{
var newHighBit = (ushort) (pd.HighBit - pd.LowBit);
Platform.Log(LogLevel.Debug, "Right aligned pixel data (High Bit: {0}->{1}).", pd.HighBit, newHighBit);
pd.HighBit = newHighBit; //correct high bit after right-aligning.
DataSet[DicomTags.HighBit].SetUInt16(0, newHighBit);
}
if (DicomUncompressedPixelData.ZeroUnusedBits(pixelStream, pd.BitsAllocated, pd.BitsStored, pd.HighBit))
{
Platform.Log(LogLevel.Debug, "Zeroed some unused bits before compression.");
}
}
// Set transfer syntax before compression, the codecs need it.
var fragments = new DicomCompressedPixelData(pd) { TransferSyntax = newTransferSyntax };
codec.Encode(pd, fragments, parameters);
fragments.UpdateMessage(this);
//TODO: should we validate the number of frames in the compressed data?
if (!DataSet.TryGetAttribute(DicomTags.PixelData, out pixelData) || pixelData.IsNull)
throw new DicomCodecException("Sop has no pixel data after compression.");
}
else
{
//A bit cheap, but check for basic image attributes - if any exist
// and are non-empty, there should probably be pixel data too.
DicomAttribute attribute;
if (DataSet.TryGetAttribute(DicomTags.Rows, out attribute) && !attribute.IsNull)
throw new DicomCodecException("Suspect Sop appears to be an image (Rows is non-empty), but has no pixel data.");
if (DataSet.TryGetAttribute(DicomTags.Columns, out attribute) && !attribute.IsNull)
throw new DicomCodecException("Suspect Sop appears to be an image (Columns is non-empty), but has no pixel data.");
TransferSyntax = newTransferSyntax;
}
}
else
{
if (codec == null)
{
codec = DicomCodecRegistry.GetCodec(TransferSyntax);
if (codec == null)
{
Platform.Log(LogLevel.Error, "Unable to get registered codec for {0}", TransferSyntax);
throw new DicomCodecException("No registered codec for: " + TransferSyntax.Name);
}
if (parameters == null)
parameters = DicomCodecRegistry.GetCodecParameters(TransferSyntax, DataSet);
}
DicomAttribute pixelData;
if (DataSet.TryGetAttribute(DicomTags.PixelData, out pixelData))
{
if (pixelData.IsNull)
throw new DicomCodecException("Sop pixel data has no valid value and cannot be decompressed.");
var fragments = new DicomCompressedPixelData(DataSet);
var pd = new DicomUncompressedPixelData(fragments);
codec.Decode(fragments, pd, parameters);
pd.TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
pd.UpdateMessage(this);
//TODO: should we validate the number of frames in the decompressed data?
if (!DataSet.TryGetAttribute(DicomTags.PixelData, out pixelData) || pixelData.IsNull)
throw new DicomCodecException("Sop has no pixel data after decompression.");
}
else
{
//NOTE: doing this for consistency, really.
DicomAttribute attribute;
if (DataSet.TryGetAttribute(DicomTags.Rows, out attribute) && !attribute.IsNull)
throw new DicomCodecException("Suspect Sop appears to be an image (Rows is non-empty), but has no pixel data.");
if (DataSet.TryGetAttribute(DicomTags.Columns, out attribute) && !attribute.IsNull)
throw new DicomCodecException("Suspect Sop appears to be an image (Columns is non-empty), but has no pixel data.");
TransferSyntax = TransferSyntax.ExplicitVrLittleEndian;
}
}
}
