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comparison Framework/Orthanc/Core/Images/JpegReader.cpp @ 1:2dbe613f6c93

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add orthanc core
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:39:01 +0200
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children da2cf3ace87a
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0:351ab0da0150 1:2dbe613f6c93
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #include "../PrecompiledHeaders.h"
34 #include "JpegReader.h"
35
36 #include "JpegErrorManager.h"
37 #include "../OrthancException.h"
38 #include "../Logging.h"
39 #include "../Toolbox.h"
40
41 namespace Orthanc
42 {
43 static void Uncompress(struct jpeg_decompress_struct& cinfo,
44 std::string& content,
45 ImageAccessor& accessor)
46 {
47 jpeg_read_header(&cinfo, TRUE);
48 jpeg_start_decompress(&cinfo);
49
50 PixelFormat format;
51 if (cinfo.output_components == 1 &&
52 cinfo.out_color_space == JCS_GRAYSCALE)
53 {
54 format = PixelFormat_Grayscale8;
55 }
56 else if (cinfo.output_components == 3 &&
57 cinfo.out_color_space == JCS_RGB)
58 {
59 format = PixelFormat_RGB24;
60 }
61 else
62 {
63 throw OrthancException(ErrorCode_NotImplemented);
64 }
65
66 unsigned int pitch = cinfo.output_width * cinfo.output_components;
67
68 /* Make a one-row-high sample array that will go away when done with image */
69 JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1);
70
71 try
72 {
73 content.resize(pitch * cinfo.output_height);
74 }
75 catch (...)
76 {
77 throw OrthancException(ErrorCode_NotEnoughMemory);
78 }
79
80 accessor.AssignWritable(format, cinfo.output_width, cinfo.output_height, pitch,
81 content.empty() ? NULL : &content[0]);
82
83 uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]);
84 while (cinfo.output_scanline < cinfo.output_height)
85 {
86 jpeg_read_scanlines(&cinfo, buffer, 1);
87 memcpy(target, buffer[0], pitch);
88 target += pitch;
89 }
90
91 // Everything went fine, "setjmp()" didn't get called
92
93 jpeg_finish_decompress(&cinfo);
94 }
95
96
97 void JpegReader::ReadFromFile(const std::string& filename)
98 {
99 FILE* fp = Toolbox::OpenFile(filename, FileMode_ReadBinary);
100 if (!fp)
101 {
102 throw OrthancException(ErrorCode_InexistentFile);
103 }
104
105 struct jpeg_decompress_struct cinfo;
106 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
107
108 Internals::JpegErrorManager jerr;
109 cinfo.err = jerr.GetPublic();
110
111 if (setjmp(jerr.GetJumpBuffer()))
112 {
113 jpeg_destroy_decompress(&cinfo);
114 fclose(fp);
115 LOG(ERROR) << "Error during JPEG decoding: " << jerr.GetMessage();
116 throw OrthancException(ErrorCode_InternalError);
117 }
118
119 // Below this line, we are under the scope of a "setjmp"
120
121 jpeg_create_decompress(&cinfo);
122 jpeg_stdio_src(&cinfo, fp);
123
124 try
125 {
126 Uncompress(cinfo, content_, *this);
127 }
128 catch (OrthancException&)
129 {
130 jpeg_destroy_decompress(&cinfo);
131 fclose(fp);
132 throw;
133 }
134
135 jpeg_destroy_decompress(&cinfo);
136 fclose(fp);
137 }
138
139
140 void JpegReader::ReadFromMemory(const void* buffer,
141 size_t size)
142 {
143 struct jpeg_decompress_struct cinfo;
144 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
145
146 Internals::JpegErrorManager jerr;
147 cinfo.err = jerr.GetPublic();
148
149 if (setjmp(jerr.GetJumpBuffer()))
150 {
151 jpeg_destroy_decompress(&cinfo);
152 LOG(ERROR) << "Error during JPEG decoding: " << jerr.GetMessage();
153 throw OrthancException(ErrorCode_InternalError);
154 }
155
156 // Below this line, we are under the scope of a "setjmp"
157 jpeg_create_decompress(&cinfo);
158 jpeg_mem_src(&cinfo, const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer)), size);
159
160 try
161 {
162 Uncompress(cinfo, content_, *this);
163 }
164 catch (OrthancException&)
165 {
166 jpeg_destroy_decompress(&cinfo);
167 throw;
168 }
169
170 jpeg_destroy_decompress(&cinfo);
171 }
172
173
174 void JpegReader::ReadFromMemory(const std::string& buffer)
175 {
176 if (buffer.empty())
177 {
178 ReadFromMemory(NULL, 0);
179 }
180 else
181 {
182 ReadFromMemory(buffer.c_str(), buffer.size());
183 }
184 }
185 }