1 /*=========================================================================
4 Module: $RCSfile: gdcmJPEGFragment.cxx,v $
6 Date: $Date: 2005/01/18 14:28:32 $
7 Version: $Revision: 1.5 $
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 (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 (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 (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()
59 * @param os Stream to print to.
60 * @param indent Indentation string to be prepended during printing.
62 void JPEGFragment::Print( std::ostream &os, std::string indent )
65 << "JPEG fragment: offset : " << Offset
66 << " length : " << Length
71 * \brief Decompress 8bits JPEG Fragment
72 * @param fp ifstream to write to
73 * @param buffer output (data decompress)
74 * @param nBits 8/12 or 16 bits jpeg
76 void JPEGFragment::DecompressJPEGFramesFromFile(std::ifstream *fp, uint8_t *buffer, int nBits)
78 // First thing need to reset file to proper position:
79 fp->seekg( Offset, std::ios::beg);
83 // JPEG Lossy : call to IJG 6b
84 if ( ! gdcm_read_JPEG_file8( fp, buffer) )
89 else if ( nBits <= 12 )
91 // Reading Fragment pixels
92 if ( ! gdcm_read_JPEG_file12 ( fp, buffer) )
97 else if ( nBits <= 16 )
99 // Reading Fragment pixels
100 if ( ! gdcm_read_JPEG_file16 ( fp, buffer) )
104 //gdcmAssertMacro( IsJPEGLossless );
108 // other JPEG lossy not supported
109 gdcmErrorMacro( "Unknown jpeg lossy compression ");
115 void JPEGFragment::DecompressJPEGSingleFrameFragmentsFromFile(JOCTET *buffer, size_t totalLength, uint8_t* raw, int nBits)
117 size_t howManyRead = 0;
118 size_t howManyWritten = 0;
122 if ( ! gdcm_read_JPEG_memory8( buffer, totalLength, raw,
123 &howManyRead, &howManyWritten ) )
125 gdcmErrorMacro( "Failed to read jpeg8 ");
130 else if ( nBits <= 12)
132 if ( ! gdcm_read_JPEG_memory12( buffer, totalLength, raw,
133 &howManyRead, &howManyWritten ) )
135 gdcmErrorMacro( "Failed to read jpeg12 ");
140 else if ( nBits <= 16)
143 if ( ! gdcm_read_JPEG_memory16( buffer, totalLength, raw,
144 &howManyRead, &howManyWritten ) )
146 gdcmErrorMacro( "Failed to read jpeg16 ");
153 // other JPEG lossy not supported
154 gdcmErrorMacro( "Unsupported jpeg lossy compression ");
161 void JPEGFragment::DecompressJPEGFragmentedFramesFromFile(JOCTET *buffer, uint8_t* raw, int nBits, size_t &howManyRead, size_t &howManyWritten, size_t totalLength)
165 if ( ! gdcm_read_JPEG_memory8( buffer+howManyRead, totalLength-howManyRead,
167 &howManyRead, &howManyWritten ) )
169 gdcmErrorMacro( "Failed to read jpeg8");
174 else if ( nBits <= 12 )
177 if ( ! gdcm_read_JPEG_memory12( buffer+howManyRead, totalLength-howManyRead,
179 &howManyRead, &howManyWritten ) )
181 gdcmErrorMacro( "Failed to read jpeg12");
186 else if ( nBits <= 16 )
189 if ( ! gdcm_read_JPEG_memory16( buffer+howManyRead, totalLength-howManyRead,
191 &howManyRead, &howManyWritten ) )
193 gdcmErrorMacro( "Failed to read jpeg16 ");
200 // other JPEG lossy not supported
201 gdcmErrorMacro( "Unsupported jpeg lossy compression ");
207 } // end namespace gdcm