- // ------------------------------- Multiframe JPEG
-
- long fragmentBegining; // for ftell, fseek
- bool b = gdcmHeader::IsJPEG2000();
-
- bool res;
- guint16 ItemTagGr,ItemTagEl;
- int ln; // Position on begining of Jpeg Pixels
-
- fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
- fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
- if(GetSwapCode()) {
- ItemTagGr=SwapShort(ItemTagGr);
- ItemTagEl=SwapShort(ItemTagEl);
- }
- fread(&ln,4,1,fp);
- if(GetSwapCode())
- ln=SwapLong(ln); // Basic Offset Table Item length
-
- if (ln != 0) {
- // What is it used for ?!?
- char *BasicOffsetTableItemValue = (char *)malloc(ln+1);
- fread(BasicOffsetTableItemValue,ln,1,fp);
- }
-
- // first Fragment initialisation
- fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
- fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
- if(GetSwapCode()) {
- ItemTagGr=SwapShort(ItemTagGr);
- ItemTagEl=SwapShort(ItemTagEl);
- }
-
- // parsing fragments until Sequence Delim. Tag found
- //unsigned short *dest = (unsigned short *)destination;
-
- while ( ( ItemTagGr == 0xfffe) && (ItemTagEl != 0xe0dd) ) {
- fread(&ln,4,1,fp);
- if(GetSwapCode())
- ln=SwapLong(ln); // Fragment Item length
-
- // FIXME : multi fragments
- fragmentBegining=ftell(fp);
-
- if (b)
- res = (bool)gdcm_read_JPEG2000_file (destination); // Not Yet written
-
- else if (IsJPEGLossless()) { // JPEG LossLess : call to LibIDO Jpeg
-
- // ------------- for each Fragment
-
- // Warning : Works only if there is one fragment per frame
- // (Or a single fragment for the multiframe file)
- ClbJpeg* jpg = _IdDcmJpegRead(fp); // TODO : find a 'full' one.
- // (We use the LibIDO one :-(
- if(jpg == NULL) {
- CloseFile();
- return false;
- }
- int * dataJpg = jpg->DataImg;
- unsigned short *dest = (unsigned short *)destination;
- switch (nBytes) {
- case 1:
- {
- for (int i=0; i<taille; i++) {
- *((unsigned char *)dest+i) = *(dataJpg +i);
- }
- break;
- }
-
- case 2:
- {
- for (int i=0; i<taille; i++) {
- *((unsigned short *)dest+i) = *(dataJpg +i);
- }
- break;
- }
- }
- _IdDcmJpegFree (jpg);
-
- res=1; // in order not to break the loop
-
- } // ------------------------------------- endif (IsJPEGLossless())
-
- else // JPEG Lossy : call to IJG 6b
- if (GetBitsStored() == 8) {
- res = (bool)gdcm_read_JPEG_file (destination); // Reading Fragment pixels
- } else {
- res = (bool)gdcm_read_JPEG_file12 (destination);// Reading Fragment pixels
- }
-
- if (!res) break;
-
- destination = (char *)destination + taille * nBytes; // location in user's memory
- // for next fragment (if any)
-
- fseek(fp,fragmentBegining,SEEK_SET); // To be sure we start
- fseek(fp,ln,SEEK_CUR); // at the begining of next fragment
-
- ItemTagGr = ItemTagEl =0;
- fread(&ItemTagGr,2,1,fp); // Reading (fffe) : Item Tag Gr
- fread(&ItemTagEl,2,1,fp); // Reading (e000) : Item Tag El
- if(GetSwapCode()) {
- ItemTagGr=SwapShort(ItemTagGr);
- ItemTagEl=SwapShort(ItemTagEl);
- }
-
- } // endWhile parsing fragments until Sequence Delim. Tag found
-
- return res;
-}