1 /*=========================================================================
4 Module: $RCSfile: gdcmDocument.h,v $
6 Date: $Date: 2005/01/12 10:47:44 $
7 Version: $Revision: 1.84 $
9 Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
10 l'Image). All rights reserved. See Doc/License.txt or
11 http://www.creatis.insa-lyon.fr/Public/Gdcm/License.html for details.
13 This software is distributed WITHOUT ANY WARRANTY; without even
14 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 PURPOSE. See the above copyright notices for more information.
17 =========================================================================*/
19 #ifndef GDCMDOCUMENT_H
20 #define GDCMDOCUMENT_H
24 #include "gdcmElementSet.h"
37 class JPEGFragmentsInfo;
39 //-----------------------------------------------------------------------------
41 * \brief Derived by both Header and DicomDir
43 class GDCM_EXPORT Document : public ElementSet
46 // Informations contained in the parser
47 virtual bool IsReadable();
48 FileType GetFileType();
50 std::string GetTransferSyntax();
54 RLEFramesInfo *GetRLEInfo() { return RLEInfo; }
55 JPEGFragmentsInfo *GetJPEGInfo() { return JPEGInfo; }
58 virtual void PrintPubDict (std::ostream &os = std::cout);
59 virtual void PrintShaDict (std::ostream &os = std::cout);
63 bool SetShaDict(Dict* dict);
64 bool SetShaDict(DictKey const &dictName);
67 /// 'Swap code' accessor (see \ref SwapCode )
68 int GetSwapCode() { return SwapCode; }
69 // System access (meaning endian related !?)
70 uint16_t SwapShort(uint16_t); // needed by File
71 uint32_t SwapLong(uint32_t); // needed by File
72 uint16_t UnswapShort(uint16_t); // needed by File
73 uint32_t UnswapLong(uint32_t); // needed by File
75 // Ordering of Documents
76 bool operator<(Document &document);
80 /// Accessor to \ref Filename
81 const std::string &GetFileName() const { return Filename; }
82 /// Accessor to \ref Filename
83 void SetFileName(std::string const &fileName) { Filename = fileName; }
85 std::ifstream *OpenFile();
87 void WriteContent( std::ofstream *fp, FileType type );
91 virtual bool SetEntry(std::string const &content,
92 uint16_t group, uint16_t element);
93 virtual bool SetEntry(uint8_t *content, int lgth,
94 uint16_t group, uint16_t element);
95 virtual bool SetEntry(std::string const &content, ValEntry *entry);
96 virtual bool SetEntry(uint8_t *content, int lgth, BinEntry *entry);
98 virtual void *GetEntryBinArea(uint16_t group, uint16_t elem);
100 virtual std::string GetEntry (uint16_t group, uint16_t elem);
101 virtual std::string GetEntryVR(uint16_t group, uint16_t elem);
102 virtual int GetEntryLength(uint16_t group, uint16_t elem);
104 DocEntry *GetDocEntry(uint16_t group, uint16_t element);
105 ValEntry *GetValEntry(uint16_t group, uint16_t element);
106 BinEntry *GetBinEntry(uint16_t group, uint16_t element);
108 ValEntry *ReplaceOrCreate(std::string const &value,
109 uint16_t group, uint16_t elem,
110 TagName const &vr = GDCM_UNKNOWN);
111 BinEntry *ReplaceOrCreate(uint8_t* binArea, int lgth,
112 uint16_t group, uint16_t elem,
113 TagName const &vr = GDCM_UNKNOWN);
114 SeqEntry *ReplaceOrCreate(uint16_t group, uint16_t elem);
116 bool ReplaceIfExist(std::string const &value,
117 uint16_t group, uint16_t elem );
119 virtual void LoadEntryBinArea(uint16_t group, uint16_t elem);
120 virtual void LoadEntryBinArea(BinEntry *entry);
122 void LoadDocEntrySafe(DocEntry *entry);
123 TagDocEntryHT *BuildFlatHashTable();
125 /// Return the Transfer Syntax as a string
126 std::string GetTransferSyntaxName();
130 // Constructor and destructor are protected to forbid end user
131 // to instanciate from this class Document (only Header and
132 // DicomDir are meaningfull).
134 Document( std::string const &filename );
137 void ReadAndSkipEncapsulatedBasicOffsetTable();
138 void ComputeRLEInfo();
139 void ComputeJPEGFragmentInfo();
141 bool CheckIfEntryExist(uint16_t group, uint16_t elem );
143 int ComputeGroup0002Length( FileType filetype );
146 /// Refering underlying filename.
147 std::string Filename;
149 /// \brief Swap code gives an information on the byte order of a
150 /// supposed to be an int32, as it's read on disc
151 /// (depending on the image Transfer Syntax *and* on the processor endianess)
152 /// as opposed as it should in memory to be dealt as an int32.
153 /// For instance, a 'Little Endian' image, read with a little endian procesor
154 /// will have a SwapCode= 1234 (the order is OK; nothing to do)
155 /// a 'Little Endian' image, read with a big endian procesor
156 /// will have a SwapCode= 2143 (the order is wrong; int32 an int16 must be
158 /// note : values 2143, 4321, 3412 remain for the ACR-NEMA time, and
159 /// the well knowed 'Bad Big Endian' and 'Bad Little Endian' codes
162 ///\brief whether we already parsed group 0002
163 bool Group0002Parsed;
165 ///\brief whether file has a DCM Preamble
168 /// File Pointer, opened during Header parsing.
171 /// ACR, ACR_LIBIDO, ExplicitVR, ImplicitVR, Unknown
174 /// After opening the file, we read HEADER_LENGTH_TO_READ bytes.
175 static const unsigned int HEADER_LENGTH_TO_READ;
177 /// \brief Elements whose value is longer than MAX_SIZE_LOAD_ELEMENT_VALUE
179 static const unsigned int MAX_SIZE_LOAD_ELEMENT_VALUE;
181 /// \brief Elements whose value is longer than MAX_SIZE_PRINT_ELEMENT_VALUE
183 /// \todo Currently not used since collides with #define in
184 /// class DocEntry . See also
185 /// method ref Document::SetMaxSizePrintEntry()
186 static const unsigned int MAX_SIZE_PRINT_ELEMENT_VALUE;
188 /// Store the RLE frames info obtained during parsing of pixels.
189 RLEFramesInfo *RLEInfo;
191 /// Store the JPEG fragments info obtained during parsing of pixels.
192 JPEGFragmentsInfo *JPEGInfo;
197 void ParseDES(DocEntrySet *set,long offset, long l_max, bool delim_mode);
198 void ParseSQ (SeqEntry *seq, long offset, long l_max, bool delim_mode);
200 void LoadDocEntry (DocEntry *e);
201 void FindDocEntryLength (DocEntry *e) throw ( FormatError );
202 uint32_t FindDocEntryLengthOBOrOW() throw( FormatUnexpected );
203 std::string FindDocEntryVR();
204 bool CheckDocEntryVR (VRKey k);
206 std::string GetDocEntryValue (DocEntry *entry);
207 std::string GetDocEntryUnvalue(DocEntry *entry);
210 void SkipDocEntry (DocEntry *entry);
211 void SkipToNextDocEntry (DocEntry *entry);
213 void FixDocEntryFoundLength(DocEntry *entry,uint32_t l);
214 bool IsDocEntryAnInteger (DocEntry *entry);
216 uint16_t ReadInt16() throw ( FormatError );
217 uint32_t ReadInt32() throw ( FormatError );
218 void SkipBytes(uint32_t);
219 bool ReadTag(uint16_t, uint16_t);
220 uint32_t ReadTagLength(uint16_t, uint16_t);
224 void SwitchByteSwapCode();
225 void SetMaxSizeLoadEntry(long);
226 void SetMaxSizePrintEntry(long);
228 // DocEntry related utilities
229 DocEntry *ReadNextDocEntry();
231 uint32_t GenerateFreeTagKeyInGroup(uint16_t group);
232 void BuildFlatHashTableRecurse( TagDocEntryHT &builtHT,
235 void HandleBrokenEndian(uint16_t &group, uint16_t &elem);
236 void HandleOutOfGroup0002(uint16_t group);
239 /// Public dictionary used to parse this header
242 /// \brief Optional "shadow dictionary" (private elements) used to parse
246 /// \brief Size threshold above which an element value will NOT be loaded
247 /// in memory (to avoid loading the image/volume itself). By default,
248 /// this upper bound is fixed to 1024 bytes (which might look reasonable
249 /// when one considers the definition of the various VR contents).
250 uint32_t MaxSizeLoadEntry;
252 /// \brief Size threshold above which an element value will NOT be *printed*
253 /// in order no to polute the screen output. By default, this upper bound
254 /// is fixed to 64 bytes.
255 uint32_t MaxSizePrintEntry;
260 } // end namespace gdcm
262 //-----------------------------------------------------------------------------