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/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "gdcmFileExplicitFilter.h"
#include "gdcmExplicitDataElement.h"
#include "gdcmSequenceOfFragments.h"
#include "gdcmSequenceOfItems.h"
#include "gdcmFragment.h"
#include "gdcmGlobal.h"
#include "gdcmDict.h"
#include "gdcmDicts.h"
#include "gdcmGroupDict.h"
#include "gdcmVR.h"
#include "gdcmVM.h"
#include "gdcmDataSetHelper.h"
namespace gdcm
{
void FileExplicitFilter::SetRecomputeItemLength(bool b)
{
RecomputeItemLength = b;
}
void FileExplicitFilter::SetRecomputeSequenceLength(bool b)
{
RecomputeSequenceLength = b;
}
bool FileExplicitFilter::ChangeFMI()
{
/*
FileMetaInformation &fmi = F->GetHeader();
TransferSyntax ts = TransferSyntax::ImplicitVRLittleEndian;
{
ts = TransferSyntax::ExplicitVRLittleEndian;
}
const char *tsuid = TransferSyntax::GetTSString( ts );
DataElement de( Tag(0x0002,0x0010) );
de.SetByteValue( tsuid, strlen(tsuid) );
de.SetVR( Attribute<0x0002, 0x0010>::GetVR() );
fmi.Replace( de );
//fmi.Remove( Tag(0x0002,0x0012) ); // will be regenerated
//fmi.Remove( Tag(0x0002,0x0013) ); // ' ' '
fmi.SetDataSetTransferSyntax(ts);
*/
return true;
}
bool FileExplicitFilter::ProcessDataSet(DataSet &ds, Dicts const & dicts)
{
if( RecomputeSequenceLength || RecomputeItemLength )
{
gdcmWarningMacro( "Not implemented sorry" );
return false;
}
DataSet::Iterator it = ds.Begin();
for( ; it != ds.End(); )
{
DataElement de = *it;
std::string strowner;
const char *owner = nullptr;
const Tag& t = de.GetTag();
if( t.IsPrivate() && !ChangePrivateTags
// As a special exception we convert to proper VR :
// - Private Group Length
// - Private Creator
// This makes the output more readable (and this should be relative safe)
&& !t.IsGroupLength() && !t.IsPrivateCreator()
)
{
// nothing to do ! just skip
++it;
continue;
}
if( t.IsPrivate() && !t.IsPrivateCreator() )
{
strowner = ds.GetPrivateCreator(t);
owner = strowner.c_str();
}
const DictEntry &entry = dicts.GetDictEntry(t,owner);
const VR &vr = entry.GetVR();
//assert( de.GetVR() == VR::INVALID );
VR cvr = DataSetHelper::ComputeVR(*F,ds, t);
VR oldvr = de.GetVR();
if( cvr == VR::SQ ) { assert( oldvr == VR::SQ || oldvr == VR::UN || oldvr == VR::INVALID || oldvr == VR::OB ); }
//SequenceOfItems *sqi = de.GetSequenceOfItems();
//SequenceOfItems *sqi = dynamic_cast<SequenceOfItems*>(&de.GetValue());
SmartPointer<SequenceOfItems> sqi = nullptr;
if( vr == VR::SQ
|| cvr == VR::SQ ) // CP-246 + Private SQ (not in dict)
{
sqi = de.GetValueAsSQ();
if(!sqi)
{
if( !de.IsEmpty() )
{
gdcmWarningMacro("DICOM file written out may not be readable" );
cvr = VR::UN;
}
}
}
if( de.GetByteValue() && !sqi )
{
// all set
//assert( cvr != VR::SQ /*&& cvr != VR::UN*/ );
assert( cvr != VR::INVALID );
if( cvr != VR::UN )
{
// about to change , make some paranoid test:
//assert( cvr.Compatible( oldvr ) ); // LT != LO but there are somewhat compatible
if( cvr & VR::VRASCII )
{
//assert( oldvr & VR::VRASCII || oldvr == VR::INVALID || oldvr == VR::UN );
// gdcm-JPEG-Extended.dcm has a couple of VR::OB private field
// is this a good idea to change them to an ASCII when we know this might not work ?
if( !(oldvr & VR::VRASCII || oldvr == VR::INVALID || oldvr == VR::UN || oldvr == VR::OB) )
{
gdcmErrorMacro( "Cannot convert VR for tag: " << t << " " << oldvr << " is incompatible with " << cvr << " as given by ref. dict." );
return false;
}
}
else if( cvr & VR::VRBINARY )
{
// PHILIPS_Gyroscan-12-MONO2-Jpeg_Lossless.dcm
if( !( oldvr & VR::VRBINARY || oldvr == VR::INVALID || oldvr == VR::UN ) )
{
gdcmErrorMacro( "Cannot convert VR for tag: " << t << " " << oldvr << " is incompatible with " << cvr << " as given by ref. dict." );
return false;
}
}
else
{
assert( 0 ); // programmer error
}
// let's do one more check we are going to make this attribute explicit VR, there is
// still a special case, when VL is > uint16_max then we must give up:
if( !(cvr & VR::VL32) && de.GetVL() > UINT16_MAX )
{
cvr = VR::UN;
}
de.SetVR( cvr );
}
}
else if( sqi )
{
assert( cvr == VR::SQ || cvr == VR::UN );
de.SetVR( VR::SQ );
if( de.GetByteValue() )
{
de.SetValue( *sqi );
//de.SetVL( sqi->ComputeLength<ExplicitDataElement>() );
}
de.SetVLToUndefined();
assert( sqi->GetLength().IsUndefined() );
// recursive
SequenceOfItems::ItemVector::iterator sit = sqi->Items.begin();
for(; sit != sqi->Items.end(); ++sit)
{
//Item &item = const_cast<Item&>(*sit);
Item &item = *sit;
item.SetVLToUndefined();
DataSet &nds = item.GetNestedDataSet();
//const DataElement &deitem = item;
ProcessDataSet(nds, dicts);
item.SetVL( item.GetLength<ExplicitDataElement>() );
}
}
else if( de.GetSequenceOfFragments() )
{
assert( cvr & VR::OB );
}
else
{
// Ok length is 0, it can be a 0 length explicit SQ (implicit) or a ByteValue...
// we cannot make any error here, simply change the VR
de.SetVR( cvr );
}
++it;
ds.Replace( de );
}
return true;
}
bool FileExplicitFilter::Change()
{
//if( !UseVRUN)
// {
// gdcmErrorMacro( "Not implemented" );
// return false;
// }
const Global& g = GlobalInstance;
const Dicts &dicts = g.GetDicts();
DataSet &ds = F->GetDataSet();
bool b = ProcessDataSet(ds, dicts);
return b;
}
} // end namespace gdcm
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