* @param enable_sequences = true to allow the header
* to be parsed *inside* the SeQuences,
* when they have an actual length
+ *\TODO : may be we need one more bool,
+ * to allow skipping the private elements while parsing the header
+ * in order to save space
*/
gdcmHeader::gdcmHeader(const char *InFilename,
bool exception_on_error,
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief Prints the Header Entries (Dicom Elements)
+ * both from the H Table and the chained list
* @return
*/
void gdcmHeader::PrintPubEntry(std::ostream & os) {
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief Prints The Dict Entries of THE public Dicom Dictionnry
* @return
*/
void gdcmHeader::PrintPubDict(std::ostream & os) {
* \brief This predicate, based on hopefully reasonable heuristics,
* decides whether or not the current gdcmHeader was properly parsed
* and contains the mandatory information for being considered as
- * a well formed and usable image.
- * @return true when gdcmHeader is the one of a reasonable Dicom file,
+ * a well formed and usable Dicom/Acr File.
+ * @return true when gdcmHeader is the one of a reasonable Dicom/Acr file,
* false otherwise.
*/
bool gdcmHeader::IsReadable(void) {
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief Determines if Transfer Syntax was already encountered
+ * and if it corresponds to a JPEG Lossless one.
*
- * @return
+ * @return True when RLE Lossless found. False in all
+ * other cases.
*/
bool gdcmHeader::IsJPEGLossless(void) {
gdcmHeaderEntry* Element = GetHeaderEntryByNumber(0x0002, 0x0010);
* @return True when the file is a dicom version 3.
*/
bool gdcmHeader::IsDicomV3(void) {
- if ( (filetype == ExplicitVR)
- || (filetype == ImplicitVR) )
- return true;
- return false;
+ // Checking if Transfert Syntax exists is enough
+ return (GetHeaderEntryByNumber(0x0002, 0x0010) != NULL);
}
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief returns the File Type
+ * (ACR, ACR_LIBIDO, ExplicitVR, ImplicitVR, Unknown)
* @return
*/
-FileType gdcmHeader::GetFileType(void)
-{
+FileType gdcmHeader::GetFileType(void) {
return(filetype);
}
* \ingroup gdcmHeader
* \brief Retrieve the number of columns of image.
* @return The encountered size when found, 0 by default.
+ * 0 means the file is NOT USABLE. The caller will have to check
*/
int gdcmHeader::GetXSize(void) {
// We cannot check for "Columns" because the "Columns" tag is present
* \ingroup gdcmHeader
* \brief Retrieve the number of lines of image.
* \warning The defaulted value is 1 as opposed to gdcmHeader::GetXSize()
- * @return The encountered size when found, 1 by default.
+ * @return The encountered size when found, 1 by default
+ * (The file contains a Signal, not an Image).
*/
int gdcmHeader::GetYSize(void) {
// We cannot check for "Rows" because the "Rows" tag is present
if ( IsDicomV3() )
return 0;
else
- // The Rows (0028,0010) entry is optional for ACR/NEMA. It might
+ // The Rows (0028,0010) entry was optional for ACR/NEMA. It might
// hence be a signal (1d image). So we default to 1:
return 1;
}
* \warning When present we consider the "Number of Frames" as the third
* dimension. When absent we consider the third dimension as
* being the "Planes" tag content.
- * @return The encountered size when found, 1 by default.
+ * @return The encountered size when found, 1 by default (single image).
*/
int gdcmHeader::GetZSize(void) {
// Both DicomV3 and ACR/Nema consider the "Number of Frames"
/**
* \ingroup gdcmHeader
- * \brief Retrieve the number of Bits Stored
+ * \brief Retrieve the number of Bits Stored (actually used)
* (as opposite to number of Bits Allocated)
*
* @return The encountered number of Bits Stored, 0 by default.
+ * 0 means the file is NOT USABLE. The caller has to check it !
*/
int gdcmHeader::GetBitsStored(void) {
std::string StrSize = GetEntryByNumber(0x0028,0x0101);
if (StrSize == GDCM_UNFOUND)
- return 1;
+ return 0; // It's supposed to be mandatory
+ // the caller will have to check
return atoi(StrSize.c_str());
}
* (8, 12 -compacted ACR-NEMA files, 16, ...)
*
* @return The encountered number of Bits Allocated, 0 by default.
+ * 0 means the file is NOT USABLE. The caller has to check it !
*/
int gdcmHeader::GetBitsAllocated(void) {
std::string StrSize = GetEntryByNumber(0x0028,0x0100);
if (StrSize == GDCM_UNFOUND)
- return 1;
+ return 0; // It's supposed to be mandatory
+ // the caller will have to check
return atoi(StrSize.c_str());
}
* (1 : gray level, 3 : RGB -1 or 3 Planes-)
*
* @return The encountered number of Samples Per Pixel, 1 by default.
+ * (Gray level Pixels)
*/
int gdcmHeader::GetSamplesPerPixel(void) {
std::string StrSize = GetEntryByNumber(0x0028,0x0002);
if (StrSize == GDCM_UNFOUND)
return 1; // Well, it's supposed to be mandatory ...
+ // but sometimes it's missing : we assume Gray pixels
return atoi(StrSize.c_str());
}
/**
* \ingroup gdcmHeader
* \brief Return the size (in bytes) of a single pixel of data.
- * @return The size in bytes of a single pixel of data.
- *
+ * @return The size in bytes of a single pixel of data; 0 by default
+ * 0 means the file is NOT USABLE; the caller will have to check
*/
int gdcmHeader::GetPixelSize(void) {
std::string PixelType = GetPixelType();
* - 32S signed 32 bit,
* \warning 12 bit images appear as 16 bit.
* \ 24 bit images appear as 8 bit
- * @return
+ * @return 0S if nothing found. NOT USABLE file. The caller has to check
*/
std::string gdcmHeader::GetPixelType(void) {
std::string BitsAlloc = GetEntryByNumber(0x0028, 0x0100); // Bits Allocated
*/
size_t gdcmHeader::GetPixelOffset(void) {
// If this file complies with the norm we should encounter the
- // "Image Location" tag (0x0028, 0x0200). This tag contains the
+ // "Image Location" tag (0x0028, 0x0200). This tag contains the
// the group that contains the pixel data (hence the "Pixel Data"
// is found by indirection through the "Image Location").
// Inside the group pointed by "Image Location" the searched element
/**
* \ingroup gdcmHeader
- * \brief Recover the pixel area length (in Bytes) .
+ * \brief Recover the pixel area length (in Bytes)
+ * @return 0 by default. NOT USABLE file. The caller has to check.
*/
size_t gdcmHeader::GetPixelAreaLength(void) {
// If this file complies with the norm we should encounter the
/**
* \ingroup gdcmHeader
* \brief tells us if LUT are used
- * \warning Right now, Segmented xxx Palette Color Lookup Table Data
+ * \warning Right now, 'Segmented xxx Palette Color Lookup Table Data'
* \ are NOT considered as LUT, since nobody knows
- *\ how to deal with them
- * @return int acts as a Boolean
+ * \ how to deal with them
+ * @return a Boolean
*/
bool gdcmHeader::HasLUT(void) {
* \ingroup gdcmHeader
* \brief gets the info from 0028,1101 : Lookup Table Desc-Red
* \ else 0
- * @return Lookup Table nBit
+ * @return Lookup Table number of Bits , 0 by default
* \ when (0028,0004),Photometric Interpretation = [PALETTE COLOR ]
*/
int gdcmHeader::GetLUTNbits(void) {
* \ 0028 1221 Segmented Red Palette Color Lookup Table Data
* \ 0028 1222 Segmented Green Palette Color Lookup Table Data
* \ 0028 1223 Segmented Blue Palette Color Lookup Table Data
- * \ no known Dicom reader deails with them :-(
- * @return Lookup Table RGBA
+ * \ no known Dicom reader deals with them :-(
+ * @return a RGBA Lookup Table
*/
unsigned char * gdcmHeader::GetLUTRGBA(void) {
// Not so easy : see
// http://www.barre.nom.fr/medical/dicom2/limitations.html#Color%20Lookup%20Tables
-// and OT-PAL-8-face.dcm
// if Photometric Interpretation # PALETTE COLOR, no LUT to be done
if (gdcmHeader::GetEntryByNumber(0x0028,0x0004) != "PALETTE COLOR ") {
return NULL;
}
-
int lengthR, debR, nbitsR;
int lengthG, debG, nbitsG;
int lengthB, debB, nbitsB;
//How to free the now useless LUTs?
-//free(LutR); free(LutB); free(LutG);
+//free(LutR); free(LutB); free(LutG); // Seg Fault when used
return(LUTRGBA);
}
/**
* \ingroup gdcmHeader
- * \brief Searches within the public dictionary for element value of
+ * \brief Searches within the file Header for element value of
* a given tag.
* @param tagName name of the searched element.
* @return Corresponding element value when it exists, and the string
/**
* \ingroup gdcmHeader
- * \brief Searches within the elements parsed with the public dictionary for
+ * \brief Searches within the elements parsed with the file Header for
* the element value representation of a given tag.
*
* Obtaining the VR (Value Representation) might be needed by caller
/**
* \ingroup gdcmHeader
- * \brief Accesses an existing gdcmHeaderEntry in the PubHeaderEntrySet of this instance
+ * \brief Accesses an existing gdcmHeaderEntry (i.e. a Dicom Element)
+ * in the PubHeaderEntrySet of this instance
* through tag name and modifies it's content with the given value.
* @param content new value to substitute with
- * @param tagName name of the tag to be modified
+ * @param tagName name of the Header Entry (Dicom Element) to be modified
*/
bool gdcmHeader::SetPubEntryByName(std::string content, std::string tagName) {
//return ( PubHeaderEntrySet.SetHeaderEntryByName (content, tagName) );
/**
* \ingroup gdcmHeader
- * \brief Accesses an existing gdcmHeaderEntry in the PubHeaderEntrySet of this instance
+ * \brief Accesses an existing gdcmHeaderEntry (i.e. a Dicom Element)
+ * in the PubHeaderEntrySet of this instance
* through it's (group, element) and modifies it's length with
* the given value.
* \warning Use with extreme caution.
/**
* \ingroup gdcmHeader
- * \brief Searches within elements parsed with the public dictionary
- * and then within the elements parsed with the shadow dictionary
+ * \brief Searches within Header Entries (Dicom Elements) parsed with
+ * the public and private dictionaries
* for the element value of a given tag.
* @param tagName name of the searched element.
* @return Corresponding element value when it exists,
/**
* \ingroup gdcmHeader
- * \brief Searches within elements parsed with the public dictionary
- * and then within the elements parsed with the shadow dictionary
+ * \brief Searches within Header Entries (Dicom Elements) parsed with
+ * the public and private dictionaries
* for the element value representation of a given tag.
*
* Obtaining the VR (Value Representation) might be needed by caller
/**
* \ingroup gdcmHeader
- * \brief Searches within elements parsed with the public dictionary
- * and then within the elements parsed with the shadow dictionary
- * for the element value of a given tag.
+ * \brief Searches within Header Entries (Dicom Elements) parsed with
+ * the public and private dictionaries
+ * for the element value representation of a given tag.
* @param group Group of the searched tag.
* @param element Element of the searched tag.
* @return Corresponding element value representation when it exists,
/**
* \ingroup gdcmHeader
- * \brief Searches within elements parsed with the public dictionary
- * and then within the elements parsed with the shadow dictionary
- * for the element value representation of a given tag.
+ * \brief Searches within Header Entries (Dicom Elements) parsed with
+ * the public and private dictionaries
+ * for the element value representation of a given tag..
*
* Obtaining the VR (Value Representation) might be needed by caller
* to convert the string typed content to caller's native type
/**
* \ingroup gdcmHeader
- * \brief Sets the value (string) of the target Dicom Element
+ * \brief Sets the value (string) of the Header Entry (Dicom Element)
* @param content string value of the Dicom Element
* @param tagName name of the searched Dicom Element.
* @return true when found
gdcmHeaderEntry * a;
IterHT p;
TagHeaderEntryHT::iterator p2;
- // DO NOT remove the following lines : they explain the stuff
+ // DO NOT remove the following lines : they explain how the stuff works
//p= tagHt.equal_range(key); // get a pair of iterators first-last synonym
//p2=p.first; // iterator on the first synonym
- //a=p2->second; // H Table target column (2-nd col)
-
+ //a=p2->second; // H Table target column (2-nd col)
// or, easier :
- a = ((PubEntrySet.GetTagHT().equal_range(key)).first)->second;
-
- a-> SetValue(content);
-
- //std::string vr = tagHt[key]->GetVR();
+ a = ((PubEntrySet.GetTagHT().equal_range(key)).first)->second;
+ a-> SetValue(content);
std::string vr = a->GetVR();
guint32 lgr;
lgr = 4;
else
lgr = l;
- //tagHt[key]->SetLength(lgr);
a->SetLength(lgr);
return true;
}
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief opens the file
* @param exception_on_error
* @return
*/
guint16 zero;
fread(&zero, (size_t)2, (size_t)1, fp);
- //ACR -- or DICOM with no Preamble
+ //ACR -- or DICOM with no Preamble --
if( zero == 0x0008 || zero == 0x0800 || zero == 0x0002 || zero == 0x0200)
return(fp);
/**
* \ingroup gdcmHeader
- * \brief
+ * \brief closes the file
* @return TRUE if the close was successfull
*/
bool gdcmHeader::CloseFile(void) {
/**
* \ingroup gdcmHeader
- * \brief
- * @return integer, acts as a Boolean
+ * \brief
+ * @param fp file pointer on an already open file
+ * @param type file type ( ImplicitVR, ExplicitVR, ...)
+ * @return Boolean
*/
bool gdcmHeader::Write(FILE * fp, FileType type) {
/**
* \ingroup gdcmHeader
- * \brief TODO
- * @param Value
+ * \brief Modifies the value of a given Header Entry (Dicom Element)
+ * if it exists; Creates it with the given value if it doesn't
+ * @param Value passed as a std::string
* @param Group
* @param Elem
- * \return integer acts as a boolean
+ * \return boolean
*/
bool gdcmHeader::ReplaceOrCreateByNumber(std::string Value,
guint16 Group, guint16 Elem ) {
- // TODO : FIXME JPRx
- // curieux, non ?
- // on (je) cree une HeaderEntry ne contenant pas de valeur
- // on l'ajoute au HeaderEntrySet
- // on affecte une valeur a cette HeaderEntry a l'interieur du HeaderEntrySet
- // --> devrait pouvoir etre fait + simplement ???
+
if (CheckIfExistByNumber(Group, Elem) == 0) {
gdcmHeaderEntry* a =NewHeaderEntryByNumber(Group, Elem);
if (a == NULL)
/**
* \ingroup gdcmHeader
- * \brief Modify (or Creates if not found) an element
- * @param Value new value
+ * \brief Modifies the value of a given Header Entry (Dicom Element)
+ * if it exists; Creates it with the given value if it doesn't
+ * @param Value passed as a char*
* @param Group
* @param Elem
- * \return integer acts as a boolean
+ * \return boolean
*
*/
bool gdcmHeader::ReplaceOrCreateByNumber(char* Value, guint16 Group, guint16 Elem ) {
*/
bool gdcmHeader::ReplaceIfExistByNumber(char* Value, guint16 Group, guint16 Elem ) {
- //gdcmHeaderEntry* HeaderEntry = PubHeaderEntrySet.GetElementByNumber(Group, Elem);
std::string v = Value;
PubEntrySet.SetEntryByNumber(v, Group, Elem);
return true;
/**
* \ingroup gdcmHeader
- * \brief Searches within the public dictionary for a Dicom Element of
+ * \brief Searches within the Header Entries for a Dicom Element of
* a given tag.
* @param tagName name of the searched Dicom Element.
* @return Corresponding Dicom Element when it exists, and NULL
* \ exists in the Public HeaderEntrySet
* @param Group
* @param Elem
- * @return integer acts as a boolean
+ * @return boolean
*/
bool gdcmHeader::CheckIfExistByNumber(guint16 Group, guint16 Elem ) {
return (PubEntrySet.CheckIfExistByNumber(Group, Elem)>0);
/**
* \ingroup gdcmHeader
* \brief Gets (from Header) the offset of a 'non string' element value
- * \ (LoadElementValue has already be executed)
+ * \ (LoadElementValues has already be executed)
* @param Group
* @param Elem
* @return File Offset of the Element Value
/**
* \ingroup gdcmHeader
* \brief Gets (from Header) a 'non string' element value
- * \ (LoadElementValue has already be executed)
+ * \ (LoadElementValues has already be executed)
* @param Group
* @param Elem
* @return Pointer to the 'non string' area
// Private
/**
* \ingroup gdcmHeader
- * \brief Loads the element values of all the elements present in the
- * public tag based hash table.
+ * \brief Loads the element values of all the Header Entries pointed in the
+ * public Chained List.
*/
void gdcmHeader::LoadHeaderEntries(void) {
rewind(fp);
-
- // We don't use any longer the HashTable, since a lot a stuff is missing
- // when SeQuences were encountered
- //
- //TagHeaderEntryHT ht = PubHeaderEntrySet.GetTagHT();
- //for (TagHeaderEntryHT::iterator tag = ht.begin(); tag != ht.end(); ++tag) {
- // LoadElementValue(tag->second);
- //}
-
- for (ListTag::iterator i = GetPubListEntry().begin();
- i != GetPubListEntry().end();
- ++i){
- LoadHeaderEntry(*i);
- }
-
+ for (ListTag::iterator i = GetPubListEntry().begin();
+ i != GetPubListEntry().end();
+ ++i){
+ LoadHeaderEntry(*i);
+ }
+
rewind(fp);
// Load 'non string' values
// we switch lineNumber and columnNumber
//
std::string RecCode;
- RecCode = GetPubEntryByNumber(0x0008, 0x0010);
+ RecCode = GetPubEntryByNumber(0x0008, 0x0010); // recognition code
if (RecCode == "ACRNEMA_LIBIDO_1.1" ||
RecCode == "CANRME_AILIBOD1_1." ) {
filetype = ACR_LIBIDO;
* \brief Loads the element content if it's length is not bigger
* than the value specified with
* gdcmHeader::SetMaxSizeLoadElementValue()
- * @param ElVal string value of the Dicom Element
+ * @param ElVal Header Entry (Dicom Element) to be dealt with
*/
void gdcmHeader::LoadHeaderEntry(gdcmHeaderEntry * ElVal) {
size_t item_read;
// the test was commented out to 'go inside' the SeQuences
// we don't any longer skip them !
- // if( vr == "SQ" )
+ // if( vr == "SQ" ) // (DO NOT remove this comment)
// SkipLoad = true;
// A SeQuence "contains" a set of Elements.
return;
}
- // When an integer is expected, read and convert the following two or
- // four bytes properly i.e. as an integer as opposed to a string.
-
- // Actually, elements with Value Multiplicity > 1
- // contain a set of integers (not a single one)
- // Any compacter code suggested (?)
+ // When integer(s) are expected, read and convert the following
+ // n *(two or four bytes)
+ // properly i.e. as integers as opposed to a strings.
+ // Elements with Value Multiplicity > 1
+ // contain a set of integers (not a single one)
+
+ // Any compacter code suggested (?)
if ( IsHeaderEntryAnInteger(ElVal) ) {
guint32 NewInt;
std::ostringstream s;
* \ingroup gdcmHeader
* \brief Loads the element while preserving the current
* underlying file position indicator as opposed to
- * to LoadElementValue that modifies it.
- * @param ElVal Element whose value shall be loaded.
+ * to LoadHeaderEntry that modifies it.
+ * @param entry Header Entry whose value shall be loaded.
* @return
*/
-void gdcmHeader::LoadHeaderEntrySafe(gdcmHeaderEntry * ElVal) {
+void gdcmHeader::LoadHeaderEntrySafe(gdcmHeaderEntry * entry) {
long PositionOnEntry = ftell(fp);
- LoadHeaderEntry(ElVal);
+ LoadHeaderEntry(entry);
fseek(fp, PositionOnEntry, SEEK_SET);
}
/**
* \ingroup gdcmHeader
* \brief
- *
+ * @param entry Header Entry whose value shall be loaded.
+
* @return
*/
void gdcmHeader::FindHeaderEntryLength (gdcmHeaderEntry * ElVal) {
/**
* \ingroup gdcmHeader
- * \brief Find the value representation of the current tag.
+ * \brief Find the Value Representation of the current Dicom Element.
* @param ElVal
*/
void gdcmHeader::FindHeaderEntryVR( gdcmHeaderEntry *ElVal) {
if ( RealExplicit ) {
if ( ElVal->IsVRUnknown() ) {
- // When not a dictionary entry, we can safely overwrite the vr.
+ // When not a dictionary entry, we can safely overwrite the VR.
ElVal->SetVR(vr);
return;
}
if ( ElVal->GetVR() == vr ) {
- // The vr we just read and the dictionary agree. Nothing to do.
+ // The VR we just read and the dictionary agree. Nothing to do.
return;
}
- // The vr present in the file and the dictionary disagree. We assume
- // the file writer knew best and use the vr of the file. Since it would
- // be unwise to overwrite the vr of a dictionary (since it would
+ // The VR present in the file and the dictionary disagree. We assume
+ // the file writer knew best and use the VR of the file. Since it would
+ // be unwise to overwrite the VR of a dictionary (since it would
// compromise it's next user), we need to clone the actual DictEntry
- // and change the vr for the read one.
+ // and change the VR for the read one.
gdcmDictEntry* NewTag = new gdcmDictEntry(ElVal->GetGroup(),
ElVal->GetElement(),
vr,
fseek(fp, PositionOnEntry, SEEK_SET);
// When this element is known in the dictionary we shall use, e.g. for
- // the semantics (see the usage of IsAnInteger), the vr proposed by the
+ // the semantics (see the usage of IsAnInteger), the VR proposed by the
// dictionary entry. Still we have to flag the element as implicit since
// we know now our assumption on expliciteness is not furfilled.
// avoid .
* @param ElVal
* @return
*/
-void gdcmHeader::SkipHeaderEntry(gdcmHeaderEntry * ElVal) {
- SkipBytes(ElVal->GetLength());
+void gdcmHeader::SkipHeaderEntry(gdcmHeaderEntry * entry) {
+ SkipBytes(entry->GetLength());
}
/**
FoundLength =0;
}
-
// a SeQuence Element is beginning
// Let's forget it's length
// (we want to 'go inside')
// Pb : *normaly* fffe|e000 is just a marker, its length *should be* zero
// in gdcm-MR-PHILIPS-16-Multi-Seq.dcm we find lengthes as big as 28800
- // if we set the length to zero IsAnInteger() breaks...
+ // if we set the length to zero IsHeaderEntryAnInteger() breaks...
// if we don't, we lost 28800 characters from the Header :-(
else if(ElVal->GetGroup() == 0xfffe){
projects / gdcm.git / commitdiff