Program: gdcm
Module: $RCSfile: gdcmDocument.cxx,v $
Language: C++
- Date: $Date: 2005/01/26 16:28:58 $
- Version: $Revision: 1.213 $
+ Date: $Date: 2005/01/26 17:17:31 $
+ Version: $Revision: 1.214 $
Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
l'Image). All rights reserved. See Doc/License.txt or
#include "gdcmDebug.h"
#include "gdcmTS.h"
#include "gdcmDictSet.h"
-#include "gdcmRLEFramesInfo.h"
-#include "gdcmJPEGFragmentsInfo.h"
#include "gdcmDocEntrySet.h"
#include "gdcmSQItem.h"
*/
Document::Document( std::string const &filename ) : ElementSet(-1)
{
- RLEInfo = NULL;
- JPEGInfo = NULL;
-
SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
Filename = filename;
Initialize();
*/
Document::Document() : ElementSet(-1)
{
- RLEInfo = NULL;
- JPEGInfo = NULL;
-
Fp = 0;
SetMaxSizeLoadEntry(MAX_SIZE_LOAD_ELEMENT_VALUE);
{
RefPubDict = NULL;
RefShaDict = NULL;
-
- if( RLEInfo )
- delete RLEInfo;
- if( JPEGInfo )
- delete JPEGInfo;
}
//-----------------------------------------------------------------------------
if(Fp)
{
gdcmVerboseMacro( "File already open: " << Filename.c_str());
+ CloseFile();
}
Fp = new std::ifstream(Filename.c_str(), std::ios::in | std::ios::binary);
}
}
- if ( ( newDocEntry->GetGroup() == 0x7fe0 )
- && ( newDocEntry->GetElement() == 0x0010 ) )
- {
- std::string ts = GetTransferSyntax();
- if ( Global::GetTS()->IsRLELossless(ts) )
- {
- long positionOnEntry = Fp->tellg();
- Fp->seekg( newDocEntry->GetOffset(), std::ios::beg );
- ComputeRLEInfo();
- Fp->seekg( positionOnEntry, std::ios::beg );
- }
- else if ( Global::GetTS()->IsJPEG(ts) )
- {
- long positionOnEntry = Fp->tellg();
- Fp->seekg( newDocEntry->GetOffset(), std::ios::beg );
- ComputeJPEGFragmentInfo();
- Fp->seekg( positionOnEntry, std::ios::beg );
- }
- }
-
// Just to make sure we are at the beginning of next entry.
SkipToNextDocEntry(newDocEntry);
}
{
RefPubDict = Global::GetDicts()->GetDefaultPubDict();
RefShaDict = NULL;
- RLEInfo = new RLEFramesInfo;
- JPEGInfo = new JPEGFragmentsInfo;
Filetype = Unknown;
}
//}
/**
- * \brief Assuming the internal file pointer \ref Document::Fp
- * is placed at the beginning of a tag check whether this
- * tag is (TestGroup, TestElement).
- * \warning On success the internal file pointer \ref Document::Fp
- * is modified to point after the tag.
- * On failure (i.e. when the tag wasn't the expected tag
- * (TestGroup, TestElement) the internal file pointer
- * \ref Document::Fp is restored to it's original position.
- * @param testGroup The expected group of the tag.
- * @param testElement The expected Element of the tag.
- * @return True on success, false otherwise.
+ * \brief Compares two documents, according to \ref DicomDir rules
+ * \warning Does NOT work with ACR-NEMA files
+ * \todo Find a trick to solve the pb (use RET fields ?)
+ * @param document
+ * @return true if 'smaller'
*/
-bool Document::ReadTag(uint16_t testGroup, uint16_t testElement)
+bool Document::operator<(Document &document)
{
- long positionOnEntry = Fp->tellg();
- long currentPosition = Fp->tellg(); // On debugging purposes
-
- //// Read the Item Tag group and element, and make
- // sure they are what we expected:
- uint16_t itemTagGroup;
- uint16_t itemTagElement;
- try
- {
- itemTagGroup = ReadInt16();
- itemTagElement = ReadInt16();
- }
- catch ( FormatError e )
+ // Patient Name
+ std::string s1 = GetEntryValue(0x0010,0x0010);
+ std::string s2 = document.GetEntryValue(0x0010,0x0010);
+ if(s1 < s2)
{
- //std::cerr << e << std::endl;
- return false;
+ return true;
}
- if ( itemTagGroup != testGroup || itemTagElement != testElement )
+ else if( s1 > s2 )
{
- gdcmVerboseMacro( "Wrong Item Tag found:"
- << " We should have found tag ("
- << std::hex << testGroup << "," << testElement << ")" << std::endl
- << " but instead we encountered tag ("
- << std::hex << itemTagGroup << "," << itemTagElement << ")"
- << " at address: " << " 0x(" << (unsigned int)currentPosition << ")"
- ) ;
- Fp->seekg(positionOnEntry, std::ios::beg);
-
return false;
}
- return true;
-}
-
-/**
- * \brief Assuming the internal file pointer \ref Document::Fp
- * is placed at the beginning of a tag (TestGroup, TestElement),
- * read the length associated to the Tag.
- * \warning On success the internal file pointer \ref Document::Fp
- * is modified to point after the tag and it's length.
- * On failure (i.e. when the tag wasn't the expected tag
- * (TestGroup, TestElement) the internal file pointer
- * \ref Document::Fp is restored to it's original position.
- * @param testGroup The expected group of the tag.
- * @param testElement The expected Element of the tag.
- * @return On success returns the length associated to the tag. On failure
- * returns 0.
- */
-uint32_t Document::ReadTagLength(uint16_t testGroup, uint16_t testElement)
-{
-
- if ( !ReadTag(testGroup, testElement) )
- {
- return 0;
- }
-
- //// Then read the associated Item Length
- long currentPosition = Fp->tellg();
- uint32_t itemLength = ReadInt32();
- {
- gdcmVerboseMacro( "Basic Item Length is: "
- << itemLength << std::endl
- << " at address: " << std::hex << (unsigned int)currentPosition);
- }
- return itemLength;
-}
-
-/**
- * \brief When parsing the Pixel Data of an encapsulated file, read
- * the basic offset table (when present, and BTW dump it).
- */
-void Document::ReadAndSkipEncapsulatedBasicOffsetTable()
-{
- //// Read the Basic Offset Table Item Tag length...
- uint32_t itemLength = ReadTagLength(0xfffe, 0xe000);
-
- // When present, read the basic offset table itself.
- // Notes: - since the presence of this basic offset table is optional
- // we can't rely on it for the implementation, and we will simply
- // trash it's content (when present).
- // - still, when present, we could add some further checks on the
- // lengths, but we won't bother with such fuses for the time being.
- if ( itemLength != 0 )
- {
- char *basicOffsetTableItemValue = new char[itemLength + 1];
- Fp->read(basicOffsetTableItemValue, itemLength);
-
-#ifdef GDCM_DEBUG
- for (unsigned int i=0; i < itemLength; i += 4 )
- {
- uint32_t individualLength = str2num( &basicOffsetTableItemValue[i],
- uint32_t);
- gdcmVerboseMacro( "Read one length: " <<
- std::hex << individualLength );
- }
-#endif //GDCM_DEBUG
-
- delete[] basicOffsetTableItemValue;
- }
-}
-
-/**
- * \brief Parse pixel data from disk of [multi-]fragment RLE encoding.
- * Compute the RLE extra information and store it in \ref RLEInfo
- * for later pixel retrieval usage.
- */
-void Document::ComputeRLEInfo()
-{
- std::string ts = GetTransferSyntax();
- if ( !Global::GetTS()->IsRLELossless(ts) )
+ else
{
- return;
- }
-
- // Encoded pixel data: for the time being we are only concerned with
- // Jpeg or RLE Pixel data encodings.
- // As stated in PS 3.5-2003, section 8.2 p44:
- // "If sent in Encapsulated Format (i.e. other than the Native Format) the
- // value representation OB is used".
- // Hence we expect an OB value representation. Concerning OB VR,
- // the section PS 3.5-2003, section A.4.c p 58-59, states:
- // "For the Value Representations OB and OW, the encoding shall meet the
- // following specifications depending on the Data element tag:"
- // [...snip...]
- // - the first item in the sequence of items before the encoded pixel
- // data stream shall be basic offset table item. The basic offset table
- // item value, however, is not required to be present"
-
- ReadAndSkipEncapsulatedBasicOffsetTable();
-
- // Encapsulated RLE Compressed Images (see PS 3.5-2003, Annex G)
- // Loop on the individual frame[s] and store the information
- // on the RLE fragments in a RLEFramesInfo.
- // Note: - when only a single frame is present, this is a
- // classical image.
- // - when more than one frame are present, then we are in
- // the case of a multi-frame image.
- long frameLength;
- while ( (frameLength = ReadTagLength(0xfffe, 0xe000)) )
- {
- // Parse the RLE Header and store the corresponding RLE Segment
- // Offset Table information on fragments of this current Frame.
- // Note that the fragment pixels themselves are not loaded
- // (but just skipped).
- long frameOffset = Fp->tellg();
-
- uint32_t nbRleSegments = ReadInt32();
- if ( nbRleSegments > 16 )
+ // Patient ID
+ s1 = GetEntryValue(0x0010,0x0020);
+ s2 = document.GetEntryValue(0x0010,0x0020);
+ if ( s1 < s2 )
{
- // There should be at most 15 segments (refer to RLEFrame class)
- gdcmVerboseMacro( "Too many segments.");
+ return true;
}
-
- uint32_t rleSegmentOffsetTable[16];
- for( int k = 1; k <= 15; k++ )
+ else if ( s1 > s2 )
{
- rleSegmentOffsetTable[k] = ReadInt32();
+ return false;
}
-
- // Deduce from both the RLE Header and the frameLength the
- // fragment length, and again store this info in a
- // RLEFramesInfo.
- long rleSegmentLength[15];
- // skipping (not reading) RLE Segments
- if ( nbRleSegments > 1)
+ else
{
- for(unsigned int k = 1; k <= nbRleSegments-1; k++)
+ // Study Instance UID
+ s1 = GetEntryValue(0x0020,0x000d);
+ s2 = document.GetEntryValue(0x0020,0x000d);
+ if ( s1 < s2 )
{
- rleSegmentLength[k] = rleSegmentOffsetTable[k+1]
- - rleSegmentOffsetTable[k];
- SkipBytes(rleSegmentLength[k]);
- }
- }
-
- rleSegmentLength[nbRleSegments] = frameLength
- - rleSegmentOffsetTable[nbRleSegments];
- SkipBytes(rleSegmentLength[nbRleSegments]);
-
- // Store the collected info
- RLEFrame *newFrame = new RLEFrame;
- newFrame->SetNumberOfFragments(nbRleSegments);
- for( unsigned int uk = 1; uk <= nbRleSegments; uk++ )
- {
- newFrame->SetOffset(uk,frameOffset + rleSegmentOffsetTable[uk]);
- newFrame->SetLength(uk,rleSegmentLength[uk]);
- }
- RLEInfo->AddFrame(newFrame);
- }
-
- // Make sure that at the end of the item we encounter a 'Sequence
- // Delimiter Item':
- if ( !ReadTag(0xfffe, 0xe0dd) )
- {
- gdcmVerboseMacro( "No sequence delimiter item at end of RLE item sequence");
+ return true;
+ }
+ else if( s1 > s2 )
+ {
+ return false;
+ }
+ else
+ {
+ // Serie Instance UID
+ s1 = GetEntryValue(0x0020,0x000e);
+ s2 = document.GetEntryValue(0x0020,0x000e);
+ if ( s1 < s2 )
+ {
+ return true;
+ }
+ else if( s1 > s2 )
+ {
+ return false;
+ }
+ }
+ }
}
+ return false;
}
/**
- * \brief Parse pixel data from disk of [multi-]fragment Jpeg encoding.
- * Compute the jpeg extra information (fragment[s] offset[s] and
- * length) and store it[them] in \ref JPEGInfo for later pixel
- * retrieval usage.
+ * \brief Re-computes the length of a ACR-NEMA/Dicom group from a DcmHeader
+ * @param filetype Type of the File to be written
*/
-void Document::ComputeJPEGFragmentInfo()
+int Document::ComputeGroup0002Length( FileType filetype )
{
- // If you need to, look for comments of ComputeRLEInfo().
- std::string ts = GetTransferSyntax();
- if ( ! Global::GetTS()->IsJPEG(ts) )
+ uint16_t gr;
+ std::string vr;
+
+ int groupLength = 0;
+ bool found0002 = false;
+
+ // for each zero-level Tag in the DCM Header
+ DocEntry *entry = GetFirstEntry();
+ while(entry)
{
- return;
- }
-
- ReadAndSkipEncapsulatedBasicOffsetTable();
-
- // Loop on the fragments[s] and store the parsed information in a
- // JPEGInfo.
- long fragmentLength;
- while ( (fragmentLength = ReadTagLength(0xfffe, 0xe000)) )
- {
- long fragmentOffset = Fp->tellg();
-
- // Store the collected info
- JPEGFragment *newFragment = new JPEGFragment;
- newFragment->SetOffset(fragmentOffset);
- newFragment->SetLength(fragmentLength);
- JPEGInfo->AddFragment(newFragment);
+ gr = entry->GetGroup();
- SkipBytes(fragmentLength);
- }
+ if (gr == 0x0002)
+ {
+ found0002 = true;
+ vr = entry->GetVR();
+
+ if (filetype == ExplicitVR)
+ {
+ if ( (vr == "OB") || (vr == "OW") || (vr == "SQ") )
+ {
+ groupLength += 4; // explicit VR AND OB, OW, SQ : 4 more bytes
+ }
+ }
+ groupLength += 2 + 2 + 4 + entry->GetLength();
+ }
+ else if (found0002 )
+ break;
- // Make sure that at the end of the item we encounter a 'Sequence
- // Delimiter Item':
- if ( !ReadTag(0xfffe, 0xe0dd) )
- {
- gdcmVerboseMacro( "No sequence delimiter item at end of JPEG item sequence");
+ entry = GetNextEntry();
}
+ return groupLength;
}
/*
return FlatHT;
}*/
-
-
-/**
- * \brief Compares two documents, according to \ref DicomDir rules
- * \warning Does NOT work with ACR-NEMA files
- * \todo Find a trick to solve the pb (use RET fields ?)
- * @param document
- * @return true if 'smaller'
- */
-bool Document::operator<(Document &document)
-{
- // Patient Name
- std::string s1 = GetEntryValue(0x0010,0x0010);
- std::string s2 = document.GetEntryValue(0x0010,0x0010);
- if(s1 < s2)
- {
- return true;
- }
- else if( s1 > s2 )
- {
- return false;
- }
- else
- {
- // Patient ID
- s1 = GetEntryValue(0x0010,0x0020);
- s2 = document.GetEntryValue(0x0010,0x0020);
- if ( s1 < s2 )
- {
- return true;
- }
- else if ( s1 > s2 )
- {
- return false;
- }
- else
- {
- // Study Instance UID
- s1 = GetEntryValue(0x0020,0x000d);
- s2 = document.GetEntryValue(0x0020,0x000d);
- if ( s1 < s2 )
- {
- return true;
- }
- else if( s1 > s2 )
- {
- return false;
- }
- else
- {
- // Serie Instance UID
- s1 = GetEntryValue(0x0020,0x000e);
- s2 = document.GetEntryValue(0x0020,0x000e);
- if ( s1 < s2 )
- {
- return true;
- }
- else if( s1 > s2 )
- {
- return false;
- }
- }
- }
- }
- return false;
-}
-
-/**
- * \brief Re-computes the length of a ACR-NEMA/Dicom group from a DcmHeader
- * @param filetype Type of the File to be written
- */
-int Document::ComputeGroup0002Length( FileType filetype )
-{
- uint16_t gr;
- std::string vr;
-
- int groupLength = 0;
- bool found0002 = false;
-
- // for each zero-level Tag in the DCM Header
- DocEntry *entry = GetFirstEntry();
- while(entry)
- {
- gr = entry->GetGroup();
-
- if (gr == 0x0002)
- {
- found0002 = true;
- vr = entry->GetVR();
-
- if (filetype == ExplicitVR)
- {
- if ( (vr == "OB") || (vr == "OW") || (vr == "SQ") )
- {
- groupLength += 4; // explicit VR AND OB, OW, SQ : 4 more bytes
- }
- }
- groupLength += 2 + 2 + 4 + entry->GetLength();
- }
- else if (found0002 )
- break;
-
- entry = GetNextEntry();
- }
- return groupLength;
-}
-
} // end namespace gdcm
//-----------------------------------------------------------------------------
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff