-//This is needed when compiling in debug mode
-#ifdef _MSC_VER
-// 'identifier' : class 'type' needs to have dll-interface to be used by
-// clients of class 'type2'
-#pragma warning ( disable : 4251 )
-// 'identifier' : identifier was truncated to 'number' characters in the
-// debug information
-#pragma warning ( disable : 4786 )
-#endif //_MSC_VER
+/*=========================================================================
+
+ Program: gdcm
+ Module: $RCSfile: gdcmRLE.cxx,v $
+ Language: C++
+ Date: $Date: 2004/09/24 11:39:21 $
+ Version: $Revision: 1.22 $
+
+ Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
+ l'Image). All rights reserved. See Doc/License.txt or
+ http://www.creatis.insa-lyon.fr/Public/Gdcm/License.htm 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 notices for more information.
+
+=========================================================================*/
#include <stdio.h>
#include "gdcmFile.h"
-#include "jpeg/libijg8/cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "jpeg/libijg8/jversion.h" /* for version message */
-#include <ctype.h> /* to declare isprint() */
-/* Create the add-on message string table. */
-
-#define JMESSAGE(code,string) string ,
-
-static const char * const cdjpeg_message_table[] = {
-#include "jpeg/libijg8/cderror.h"
- NULL
-};
+#include <ctype.h> // For isprint()
+
+#define str2num(str, typeNum) *((typeNum *)(str))
+
+//-----------------------------------------------------------------------------
+/**
+ * \ingroup gdcmFile
+ * \brief Reads a 'Run Length Encoded' Dicom encapsulated file
+ * @param fp already open File Pointer
+ * @param image_buffer destination Address (in caller's memory space)
+ * at which the pixel data should be copied
+ * @return Boolean
+ */
+bool gdcmFile::gdcm_read_RLE_file (FILE* fp,void* image_buffer) {
+ long fragmentBegining; // for ftell, fseek
+ char * im = (char *)image_buffer;
+
+ long RleSegmentLength[15],fragmentLength,uncompressedSegmentSize;;
+ long ftellRes, ln;
+ uint32_t nbRleSegments;
+ uint32_t RleSegmentOffsetTable[15];
+ uint16_t ItemTagGr,ItemTagEl;
+ uncompressedSegmentSize=Header->GetXSize()*Header->GetYSize();
+ ftellRes=ftell(fp);
+ // Basic Offset Table with Item Value
+ // Item Tag
+ fread(&ItemTagGr,2,1,fp); // Reading (fffe):Basic Offset Table Item Tag Gr
+ fread(&ItemTagEl,2,1,fp); // Reading (e000):Basic Offset Table Item Tag El
+ if(Header->GetSwapCode()) {
+ ItemTagGr=Header->SwapShort(ItemTagGr);
+ ItemTagEl=Header->SwapShort(ItemTagEl);
+ }
+ // Item Length
+ ftellRes=ftell(fp);
+ fread(&ln,4,1,fp);
+ if(Header->GetSwapCode())
+ ln=Header->SwapLong(ln); // Basic Offset Table Item Lentgh
+ if (ln != 0) {
+ // What is it used for ??
+ char * BasicOffsetTableItemValue= new char[ln+1];
+ fread(BasicOffsetTableItemValue,ln,1,fp);
+ uint32_t a;
+ for (int i=0;i<ln;i+=4){
+ a=str2num(&BasicOffsetTableItemValue[i],uint32_t);
+ }
+ }
+
+ ftellRes=ftell(fp);
+ fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
+ fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
+ if(Header->GetSwapCode()) {
+ ItemTagGr=Header->SwapShort(ItemTagGr);
+ ItemTagEl=Header->SwapShort(ItemTagEl);
+ }
+
+ // while 'Sequence Delimiter Item' (fffe,e0dd) not found
+ while ( ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) {
+ // Parse fragments of the current Fragment (Frame)
+ ftellRes=ftell(fp);
+ fread(&fragmentLength,4,1,fp);
+ if(Header->GetSwapCode())
+ fragmentLength=Header->SwapLong(fragmentLength); // length
+
+ //------------------ scanning (not reading) fragment pixels
- /* -------------------------------------------------------------------- */
- //
- // RLE LossLess Files
- //
- /* -------------------------------------------------------------------- */
-
-int
-gdcmFile::gdcm_read_RLE_file (void * image_buffer) {
-
-
-
-
-
-
-
-
-
-
-
-
+ fread(&nbRleSegments,4,1,fp); // Reading : Number of RLE Segments
+ if(Header->GetSwapCode())
+ nbRleSegments=Header->SwapLong(nbRleSegments);
+
+ for(int k=1; k<=15; k++) { // Reading RLE Segments Offset Table
+ ftellRes=ftell(fp);
+ fread(&RleSegmentOffsetTable[k],4,1,fp);
+ if(Header->GetSwapCode())
+ RleSegmentOffsetTable[k]=Header->SwapLong(RleSegmentOffsetTable[k]);
+ }
+
+ if (nbRleSegments>1) {
+ for(unsigned int k=1; k<=nbRleSegments-1; k++) { // reading RLE Segments
+ RleSegmentLength[k]=RleSegmentOffsetTable[k+1]-RleSegmentOffsetTable[k];
+ ftellRes=ftell(fp);
+ fragmentBegining=ftell(fp);
+ gdcm_read_RLE_fragment (&im, RleSegmentLength[k],uncompressedSegmentSize,fp);
+ fseek(fp,fragmentBegining,SEEK_SET);
+ fseek(fp,RleSegmentLength[k],SEEK_CUR);
+ }
+ }
+ RleSegmentLength[nbRleSegments] = fragmentLength - RleSegmentOffsetTable[nbRleSegments];
+ ftellRes=ftell(fp);
+ fragmentBegining=ftell(fp);
+ gdcm_read_RLE_fragment (&im, RleSegmentLength[nbRleSegments],uncompressedSegmentSize, fp);
+ fseek(fp,fragmentBegining,SEEK_SET);
+ fseek(fp,RleSegmentLength[nbRleSegments],SEEK_CUR);
+
+ // end of scanning fragment pixels
+
+ ftellRes=ftell(fp);
+ fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
+ fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
+ if(Header->GetSwapCode()) {
+ ItemTagGr=Header->SwapShort(ItemTagGr);
+ ItemTagEl=Header->SwapShort(ItemTagEl);
+ }
+ }
+
+ if (Header->GetBitsAllocated()==16) { // try to deal with RLE 16 Bits
+
+ im = (char *)image_buffer;
+ // need to make 16 Bits Pixels from Low Byte and Hight Byte 'Planes'
+
+ int l = Header->GetXSize()*Header->GetYSize();
+ int nbFrames = Header->GetZSize();
+
+ char * newDest = new char[l*nbFrames*2];
+ char *x = newDest;
+ char * a = (char *)image_buffer;
+ char * b = a + l;
+
+ for (int i=0;i<nbFrames;i++) {
+ for (int j=0;j<l; j++) {
+ *(x++) = *(a++);
+ *(x++) = *(b++);
+ }
+ }
+ memmove(image_buffer,newDest,ImageDataSize);
+ delete[] newDest;
+ }
+
+ return true;
+}
-
-
- printf("Sorry RLE LossLess File not yet taken into account\n");
- return 0;
+// ----------------------------------------------------------------------------
+// RLE LossLess Fragment
+int gdcmFile::gdcm_read_RLE_fragment(char** areaToRead, long lengthToDecode,
+ long uncompressedSegmentSize, FILE* fp) {
+ (void)lengthToDecode; //FIXME
+ long ftellRes;
+ int count;
+ long numberOfOutputBytes=0;
+ char n, car;
+ ftellRes =ftell(fp);
+
+ while(numberOfOutputBytes<uncompressedSegmentSize) {
+ ftellRes =ftell(fp);
+ fread(&n,sizeof(char),1,fp);
+ count=n;
+ if (count >= 0 && count <= 127) {
+ fread(*areaToRead,(count+1)*sizeof(char),1,fp);
+ *areaToRead+=count+1;
+ numberOfOutputBytes+=count+1;
+ } else {
+ if (count <= -1 && count >= -127) {
+ fread(&car,sizeof(char),1,fp);
+ for(int i=0; i<-count+1; i++) {
+ (*areaToRead)[i]=car;
+ }
+ *areaToRead+=(-count+1);
+ numberOfOutputBytes+=(-count+1);
+ }
+ }
+ // if count = 128 output nothing (See : PS 3.5-2003 Page 86)
+ }
+ return 1;
}
+
+// ----------------------------------------------------------------------------
git://git.creatis.insa-lyon.fr / gdcm.git / blobdiff