1 /*=========================================================================
4 Module: $RCSfile: gdcmRLEFramesInfo.cxx,v $
6 Date: $Date: 2005/02/11 17:01:46 $
7 Version: $Revision: 1.15 $
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
69 * @param bitsAllocated Bits allocated
72 bool RLEFramesInfo::DecompressRLEFile( std::ifstream *fp , uint8_t *raw,
73 int xSize, int ySize, int zSize,
76 uint8_t *subRaw = raw;
77 long rawSegmentSize = xSize * ySize;
79 // Loop on the frame[s]
80 for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
82 subRaw = (*it)->ReadAndDecompressRLEFrame( subRaw, rawSegmentSize, fp);
85 if ( bitsAllocated == 16 )
87 // Try to deal with RLE 16 Bits
88 ConvertRLE16BitsFromRLE8Bits( raw, xSize, ySize, zSize );
95 * \brief We assume Raw contains the decoded RLE pixels but as
96 * 8 bits per pixel. We convert those pixels to 16 bits
100 * @param ySize y Size
101 * @param numberOfFrames number of frames
102 * @return Boolean always true
104 bool RLEFramesInfo::ConvertRLE16BitsFromRLE8Bits(uint8_t *raw, int xSize,
105 int ySize, int numberOfFrames)
107 size_t pixelNumber = xSize * ySize;
108 size_t rawSize = xSize * ySize * numberOfFrames;
110 // We assumed Raw contains the decoded RLE pixels but as
111 // 8 bits per pixel. In order to convert those pixels to 16 bits
112 // per pixel we cannot work in place within Raw and hence
113 // we copy it in a safe place, say copyRaw.
115 uint8_t *copyRaw = new uint8_t[rawSize * 2];
116 memmove( copyRaw, raw, rawSize * 2 );
119 uint8_t *a = copyRaw;
120 uint8_t *b = a + pixelNumber;
122 for ( int i = 0; i < numberOfFrames; i++ )
124 for ( unsigned int j = 0; j < pixelNumber; j++ )
135 //-----------------------------------------------------------------------------
138 //-----------------------------------------------------------------------------
141 //-----------------------------------------------------------------------------
145 * @param indent Indentation string to be prepended during printing.
146 * @param os Stream to print to.
148 void RLEFramesInfo::Print( std::ostream &os, std::string indent )
152 << "----------------- RLE frames --------------------------------"
155 << "Total number of Frames : " << Frames.size()
158 for(RLEFrameList::iterator it = Frames.begin(); it != Frames.end(); ++it)
161 << " frame number :" << frameNumber++
163 (*it)->Print( os, indent + " " );
167 //-----------------------------------------------------------------------------
168 } // end namespace gdcm