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/*
*
* Copyright (C) 2011-2015, OFFIS e.V.
* All rights reserved. See COPYRIGHT file for details.
*
* This software and supporting documentation were developed by
*
* OFFIS e.V.
* R&D Division Health
* Escherweg 2
* D-26121 Oldenburg, Germany
*
*
* Module: dcmdata
*
* Author: Joerg Riesmeier, Michael Onken
*
* Purpose: Static helper functionality for dcmdata module
*
*/
#include "dcmtk/config/osconfig.h" /* make sure OS specific configuration is included first */
#include "dcmtk/dcmdata/dcdatutl.h"
#include "dcmtk/dcmdata/dctypes.h"
#include "dcmtk/dcmdata/dcdeftag.h"
#include "dcmtk/dcmdata/dcmetinf.h"
#include "dcmtk/dcmdata/dcfilefo.h"
// --- static helpers ---
OFCondition DcmDataUtil::getSOPInstanceFromFile(const OFFilename &filename,
OFString &sopClassUID,
OFString &sopInstanceUID,
OFString &transferSyntaxUID,
const E_FileReadMode readMode)
{
OFCondition status = EC_IllegalParameter;
if (!filename.isEmpty())
{
DCMDATA_DEBUG("getting SOP Class UID, SOP Instance UID and Transfer Syntax UID from DICOM file");
sopClassUID.clear();
sopInstanceUID.clear();
transferSyntaxUID.clear();
// prefer to load file meta information header only (since this is more efficient)
if (readMode != ERM_dataset)
{
DcmMetaInfo metaInfo;
status = metaInfo.loadFile(filename);
if (status.good())
{
// try to get the UIDs from the meta-header
DCMDATA_DEBUG("trying to get SOP Class UID, SOP Instance UID and Transfer Syntax UID from meta-header");
metaInfo.findAndGetOFStringArray(DCM_MediaStorageSOPClassUID, sopClassUID);
metaInfo.findAndGetOFStringArray(DCM_MediaStorageSOPInstanceUID, sopInstanceUID);
metaInfo.findAndGetOFStringArray(DCM_TransferSyntaxUID, transferSyntaxUID);
}
}
// alternatively, get UIDs from the dataset (if required and desired)
if ((readMode != ERM_fileOnly) && (readMode != ERM_metaOnly))
{
if (sopClassUID.empty() || sopInstanceUID.empty())
DCMDATA_DEBUG("no SOP Class UID and/or SOP Instance UID found in meta-header, checking dataset instead");
if (status.bad() || sopClassUID.empty() || sopInstanceUID.empty() || transferSyntaxUID.empty())
{
DcmFileFormat fileformat;
status = fileformat.loadFile(filename, EXS_Unknown, EGL_noChange, 256 /* maxReadLength */, readMode);
if (status.good())
{
DcmDataset *dataset = fileformat.getDataset();
if (dataset != NULL)
{
if (sopClassUID.empty())
dataset->findAndGetOFStringArray(DCM_SOPClassUID, sopClassUID);
if (sopInstanceUID.empty())
dataset->findAndGetOFStringArray(DCM_SOPInstanceUID, sopInstanceUID);
if (transferSyntaxUID.empty())
{
DCMDATA_DEBUG("no Transfer Syntax UID found in meta-header, trying to determine from dataset instead");
// empty string in case of unknown/unsupported transfer syntax
transferSyntaxUID = DcmXfer(dataset->getOriginalXfer()).getXferID();
}
}
}
}
}
}
return status;
}
OFCondition DcmDataUtil::getSOPInstanceFromDataset(DcmDataset *dataset,
const E_TransferSyntax datasetXfer,
OFString &sopClassUID,
OFString &sopInstanceUID,
OFString &transferSyntaxUID)
{
OFCondition status = EC_IllegalParameter;
// check for invalid dataset pointer
if (dataset != NULL)
{
DCMDATA_DEBUG("getting SOP Class UID, SOP Instance UID and Transfer Syntax UID from DICOM dataset");
sopClassUID.clear();
sopInstanceUID.clear();
transferSyntaxUID.clear();
// check for correct class type
if (dataset->ident() == EVR_dataset)
{
// try to determine the transfer syntax of the dataset
E_TransferSyntax xfer = datasetXfer;
if (xfer == EXS_Unknown)
xfer = dataset->getOriginalXfer();
if (xfer == EXS_Unknown)
{
// update the internally stored transfer syntax based on the pixel data (if any)
dataset->updateOriginalXfer();
xfer = dataset->getOriginalXfer();
}
if (xfer != EXS_Unknown)
{
status = EC_Normal;
// store UID of the transfers syntax in result variable
transferSyntaxUID = DcmXfer(xfer).getXferID();
// get other UIDs directly from the dataset
dataset->findAndGetOFStringArray(DCM_SOPClassUID, sopClassUID);
dataset->findAndGetOFStringArray(DCM_SOPInstanceUID, sopInstanceUID);
} else {
DCMDATA_DEBUG("unable to determine transfer syntax from dataset");
status = EC_UnknownTransferSyntax;
}
} else
status = EC_CorruptedData;
}
return status;
}
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