X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmPixelReadConvert.cxx;h=d30ba99576c2a1bfd0cd38c19768f91af0835858;hb=6cf34d5df01e8ec0572bcef6c6b91be58212ef77;hp=38955fe7b2438ef2f2df9635ff42847c973e0879;hpb=2329c3cbf7cc86aa2c8410756927f0dcf3941441;p=gdcm.git

diff --git a/src/gdcmPixelReadConvert.cxx b/src/gdcmPixelReadConvert.cxx
index 38955fe7..d30ba995 100644
--- a/src/gdcmPixelReadConvert.cxx
+++ b/src/gdcmPixelReadConvert.cxx
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmPixelReadConvert.cxx,v $
   Language:  C++
-  Date:      $Date: 2005/05/22 18:38:52 $
-  Version:   $Revision: 1.57 $
+  Date:      $Date: 2005/05/30 01:30:39 $
+  Version:   $Revision: 1.63 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
@@ -16,11 +16,11 @@
                                                                                 
 =========================================================================*/
 
+#include "gdcmPixelReadConvert.h"
 #include "gdcmDebug.h"
 #include "gdcmFile.h"
 #include "gdcmGlobal.h"
 #include "gdcmTS.h"
-#include "gdcmPixelReadConvert.h"
 #include "gdcmDocEntry.h"
 #include "gdcmRLEFramesInfo.h"
 #include "gdcmJPEGFragmentsInfo.h"
@@ -31,8 +31,9 @@
 namespace gdcm
 {
 
-bool ReadMPEGFile (std::ifstream *fp, void *image_buffer);
-bool gdcm_read_JPEG2000_file (std::ifstream* fp, void* raw, size_t inputlength);
+//bool ReadMPEGFile (std::ifstream *fp, void *image_buffer, size_t lenght);
+bool gdcm_read_JPEG2000_file (void* raw, 
+                              char *inputdata, size_t inputlength);
 //-----------------------------------------------------------------------------
 #define str2num(str, typeNum) *((typeNum *)(str))
 
@@ -258,7 +259,7 @@ bool PixelReadConvert::ReadAndDecompressPixelData( std::ifstream *fp )
    {
       //gdcmWarningMacro( "Sorry, MPEG not yet taken into account" );
       //return false;
-      ReadMPEGFile(fp, Raw); // fp has already been seek to start of mpeg
+//      ReadMPEGFile(fp, Raw, PixelDataLength); // fp has already been seek to start of mpeg
       return true;
    }
    else
@@ -397,27 +398,61 @@ bool PixelReadConvert::ReadAndDecompressJPEGFile( std::ifstream *fp )
 {
    if ( IsJPEG2000 )
    {
-//      gdcmWarningMacro( "Sorry, JPEG2000 not yet taken into account" );
-      fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
-    if ( ! gdcm_read_JPEG2000_file( fp,Raw, JPEGInfo->GetFirstFragment()->GetLength() ) )
-          return false;
+     // FIXME this is really ugly but it seems I have to load the complete
+     // jpeg2000 stream to use jasper:
+      // I don't think we'll ever be able to deal with multiple fragments properly
+
+      unsigned long inputlength = 0;
+      JPEGFragment *jpegfrag = JPEGInfo->GetFirstFragment();
+      while( jpegfrag )
+      {
+         inputlength += jpegfrag->GetLength();
+         jpegfrag = JPEGInfo->GetNextFragment();
+      }
+      gdcmAssertMacro( inputlength != 0);
+      uint8_t *inputdata = new uint8_t[inputlength];
+      char *pinputdata = (char*)inputdata;
+      jpegfrag = JPEGInfo->GetFirstFragment();
+      while( jpegfrag )
+      {
+         fp->seekg( jpegfrag->GetOffset(), std::ios::beg);
+         fp->read(pinputdata, jpegfrag->GetLength());
+         pinputdata += jpegfrag->GetLength();
+         jpegfrag = JPEGInfo->GetNextFragment();
+      }
+      // Warning the inputdata buffer is delete in the function
+      if ( ! gdcm_read_JPEG2000_file( Raw, 
+          (char*)inputdata, inputlength ) )
+      {
+         return true;
+      }
    }
 
    if ( IsJPEGLS )
    {
+   // WARNING : JPEG-LS is NOT the 'classical' Jpeg Lossless : 
+   // [JPEG-LS is the basis for new lossless/near-lossless compression
+   // standard for continuous-tone images intended for JPEG2000. The standard
+   // is based on the LOCO-I algorithm (LOw COmplexity LOssless COmpression
+   // for Images) developed at Hewlett-Packard Laboratories]
+   //
+   // see http://datacompression.info/JPEGLS.shtml
+   //
+
       gdcmWarningMacro( "Sorry, JPEG-LS not yet taken into account" );
       fp->seekg( JPEGInfo->GetFirstFragment()->GetOffset(), std::ios::beg);
 //    if ( ! gdcm_read_JPEGLS_file( fp,Raw ) )
          return false;
    }
-
-   // else ??
-   // Precompute the offset localRaw will be shifted with
-   int length = XSize * YSize * SamplesPerPixel;
-   int numberBytes = BitsAllocated / 8;
-
-   JPEGInfo->DecompressFromFile(fp, Raw, BitsStored, numberBytes, length );
-   return true;
+   else
+     {
+     // Precompute the offset localRaw will be shifted with
+     int length = XSize * YSize * SamplesPerPixel;
+     int numberBytes = BitsAllocated / 8;
+
+     JPEGInfo->DecompressFromFile(fp, Raw, BitsStored, numberBytes, length );
+     return true;
+     }
 }
 
 /**