1 /*=========================================================================
4 Module: $RCSfile: gdcmJPEGFragment.cxx,v $
6 Date: $Date: 2005/01/24 14:52:50 $
7 Version: $Revision: 1.6 $
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 "gdcmJPEGFragment.h"
20 #include "gdcmDebug.h"
25 // For JPEG 2000, body in file gdcmJpeg2000.cxx
26 bool gdcm_read_JPEG2000_file (std::ifstream* fp, void* image_buffer);
28 // For JPEG 8 Bits, body in file gdcmJpeg8.cxx
29 //bool gdcm_read_JPEG_file8 (JPEGFragment *frag, std::ifstream *fp, void *image_buffer);
30 bool gdcm_read_JPEG_memory8 (const JOCTET *buffer, const size_t buflen,
32 size_t *howManyRead, size_t *howManyWritten);
34 // For JPEG 12 Bits, body in file gdcmJpeg12.cxx
35 //bool gdcm_read_JPEG_file12 (JPEGFragment *frag, std::ifstream *fp, void *image_buffer);
36 bool gdcm_read_JPEG_memory12 (const JOCTET *buffer, const size_t buflen,
38 size_t *howManyRead, size_t *howManyWritten);
40 // For JPEG 16 Bits, body in file gdcmJpeg16.cxx
41 // Beware this is misleading there is no 16bits DCT algorithm, only
42 // jpeg lossless compression exist in 16bits.
43 //bool gdcm_read_JPEG_file16 (JPEGFragment *frag, std::ifstream *fp, void *image_buffer);
44 bool gdcm_read_JPEG_memory16 (const JOCTET *buffer, const size_t buflen,
46 size_t *howManyRead, size_t *howManyWritten);
49 * \brief Default constructor.
51 JPEGFragment::JPEGFragment()
56 // StateSuspension = 0;
64 * @param os Stream to print to.
65 * @param indent Indentation string to be prepended during printing.
67 void JPEGFragment::Print( std::ostream &os, std::string indent )
70 << "JPEG fragment: offset : " << Offset
71 << " length : " << Length
76 * \brief Decompress 8bits JPEG Fragment
77 * @param fp ifstream to write to
78 * @param buffer output (data decompress)
79 * @param nBits 8/12 or 16 bits jpeg
81 void JPEGFragment::DecompressJPEGFramesFromFile(std::ifstream *fp, uint8_t *buffer, int nBits, int & statesuspension)
83 // First thing need to reset file to proper position:
84 fp->seekg( Offset, std::ios::beg);
88 // JPEG Lossy : call to IJG 6b
89 if ( ! this->gdcm_read_JPEG_file8( fp, buffer, statesuspension) )
94 else if ( nBits <= 12 )
96 // Reading Fragment pixels
97 if ( ! this->gdcm_read_JPEG_file12 ( fp, buffer, statesuspension) )
102 else if ( nBits <= 16 )
104 // Reading Fragment pixels
105 if ( ! this->gdcm_read_JPEG_file16 ( fp, buffer, statesuspension) )
109 //gdcmAssertMacro( IsJPEGLossless );
113 // other JPEG lossy not supported
114 gdcmErrorMacro( "Unknown jpeg lossy compression ");
120 void JPEGFragment::DecompressJPEGSingleFrameFragmentsFromFile(JOCTET *buffer, size_t totalLength, uint8_t* raw, int nBits)
122 size_t howManyRead = 0;
123 size_t howManyWritten = 0;
127 if ( ! gdcm_read_JPEG_memory8( buffer, totalLength, raw,
128 &howManyRead, &howManyWritten ) )
130 gdcmErrorMacro( "Failed to read jpeg8 ");
135 else if ( nBits <= 12)
137 if ( ! gdcm_read_JPEG_memory12( buffer, totalLength, raw,
138 &howManyRead, &howManyWritten ) )
140 gdcmErrorMacro( "Failed to read jpeg12 ");
145 else if ( nBits <= 16)
148 if ( ! gdcm_read_JPEG_memory16( buffer, totalLength, raw,
149 &howManyRead, &howManyWritten ) )
151 gdcmErrorMacro( "Failed to read jpeg16 ");
158 // other JPEG lossy not supported
159 gdcmErrorMacro( "Unsupported jpeg lossy compression ");
166 void JPEGFragment::DecompressJPEGFragmentedFramesFromFile(JOCTET *buffer, uint8_t* raw, int nBits, size_t &howManyRead, size_t &howManyWritten, size_t totalLength)
170 if ( ! gdcm_read_JPEG_memory8( buffer+howManyRead, totalLength-howManyRead,
172 &howManyRead, &howManyWritten ) )
174 gdcmErrorMacro( "Failed to read jpeg8");
179 else if ( nBits <= 12 )
182 if ( ! gdcm_read_JPEG_memory12( buffer+howManyRead, totalLength-howManyRead,
184 &howManyRead, &howManyWritten ) )
186 gdcmErrorMacro( "Failed to read jpeg12");
191 else if ( nBits <= 16 )
194 if ( ! gdcm_read_JPEG_memory16( buffer+howManyRead, totalLength-howManyRead,
196 &howManyRead, &howManyWritten ) )
198 gdcmErrorMacro( "Failed to read jpeg16 ");
205 // other JPEG lossy not supported
206 gdcmErrorMacro( "Unsupported jpeg lossy compression ");
212 } // end namespace gdcm