1 /*=========================================================================
4 Module: $RCSfile: gdcmJPEGFragment.cxx,v $
6 Date: $Date: 2005/01/31 04:15:33 $
7 Version: $Revision: 1.12 $
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
27 bool gdcm_read_JPEG2000_file (std::ifstream* fp, void* image_buffer);
29 // For JPEG-LS, body in file gdcmJpegLS.cxx
31 bool gdcm_read_JPEGLS_file (std::ifstream* fp, void* image_buffer);
34 * \brief Default constructor.
36 JPEGFragment::JPEGFragment()
47 * @param os Stream to print to.
48 * @param indent Indentation string to be prepended during printing.
50 void JPEGFragment::Print( std::ostream &os, std::string indent )
53 << "JPEG fragment: offset : " << Offset
54 << " length : " << Length
59 * \brief Decompress 8bits JPEG Fragment
60 * @param fp ifstream to write to
61 * @param buffer output (data decompress)
62 * @param nBits 8/12 or 16 bits jpeg
63 * @param statesuspension state suspension
65 void JPEGFragment::DecompressJPEGFramesFromFile(std::ifstream *fp,
66 uint8_t *buffer, int nBits,
67 int & statesuspension)
69 // First thing need to reset file to proper position:
70 fp->seekg( Offset, std::ios::beg);
74 // JPEG Lossy : call to IJG 6b - 8 bits
75 ReadJPEGFile8( fp, buffer, statesuspension);
77 else if ( nBits <= 12 )
79 // JPEG Lossy : call to IJG 6b - 12 bits
80 ReadJPEGFile12 ( fp, buffer, statesuspension);
82 else if ( nBits <= 16 )
84 // JPEG Lossy : call to IJG 6b - 16 bits
85 ReadJPEGFile16 ( fp, buffer, statesuspension);
86 //gdcmAssertMacro( IsJPEGLossless );
90 // FIXME : only the bits number is checked,
91 // NOT the compression method
93 // other JPEG lossy not supported
94 gdcmErrorMacro( "Unknown jpeg lossy compression ");
98 } // end namespace gdcm