1 /*=========================================================================
4 Module: $RCSfile: gdcmRLEFramesInfo.cxx,v $
6 Date: $Date: 2005/02/02 10:02:18 $
7 Version: $Revision: 1.13 $
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 #include "gdcmRLEFramesInfo.h"
20 #include "gdcmDebug.h"
24 //-------------------------------------------------------------------------
25 // Constructor / Destructor
26 RLEFramesInfo::~RLEFramesInfo()
28 for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
35 //-----------------------------------------------------------------------------
37 void RLEFramesInfo::AddFrame(RLEFrame *frame)
39 Frames.push_back(frame);
42 RLEFrame *RLEFramesInfo::GetFirstFrame()
44 ItFrames = Frames.begin();
45 if (ItFrames != Frames.end())
50 RLEFrame *RLEFramesInfo::GetNextFrame()
52 gdcmAssertMacro (ItFrames != Frames.end());
55 if (ItFrames != Frames.end())
61 * \brief Reads from disk the Pixel Data of 'Run Length Encoded'
62 * Dicom encapsulated file and decompress it.
63 * @param fp already open File Pointer
64 * at which the pixel data should be copied
68 * @param BitsAllocated Bits allocated
71 bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw,
72 int xSize, int ySize, int zSize,
75 uint8_t *subRaw = raw;
76 long rawSegmentSize = xSize * ySize;
78 // Loop on the frame[s]
79 for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
81 subRaw = (*it)->ReadAndDecompressRLEFrame( subRaw, rawSegmentSize, fp);
84 if ( bitsAllocated == 16 )
86 // Try to deal with RLE 16 Bits
87 ConvertRLE16BitsFromRLE8Bits( raw, xSize, ySize, zSize );
94 * \brief We assume Raw contains the decoded RLE pixels but as
95 * 8 bits per pixel. We convert those pixels to 16 bits
100 * @param numberOfFrames number of frames
101 * @return Boolean always true
103 bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits(uint8_t *raw, int xSize,
104 int ySize, int numberOfFrames)
106 size_t pixelNumber = xSize * ySize;
107 size_t rawSize = xSize * ySize * numberOfFrames;
109 // We assumed Raw contains the decoded RLE pixels but as
110 // 8 bits per pixel. In order to convert those pixels to 16 bits
111 // per pixel we cannot work in place within Raw and hence
112 // we copy it in a safe place, say copyRaw.
114 uint8_t *copyRaw = new uint8_t[rawSize * 2];
115 memmove( copyRaw, raw, rawSize * 2 );
118 uint8_t *a = copyRaw;
119 uint8_t *b = a + pixelNumber;
121 for ( int i = 0; i < numberOfFrames; i++ )
123 for ( unsigned int j = 0; j < pixelNumber; j++ )
131 /// \todo check that operator new [] didn't fail, and sometimes return false
136 //-----------------------------------------------------------------------------
139 //-----------------------------------------------------------------------------
142 //-----------------------------------------------------------------------------
146 * @param indent Indentation string to be prepended during printing.
147 * @param os Stream to print to.
149 void RLEFramesInfo::Print( std::ostream &os, std::string indent )
153 << "----------------- RLE frames --------------------------------"
156 << "Total number of Frames : " << Frames.size()
159 for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
162 << " frame number :" << frameNumber++
164 (*it)->Print( os, indent + " " );
168 //-----------------------------------------------------------------------------
169 } // end namespace gdcm