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comparison Core/Images/JpegReader.cpp @ 1612:96582230ddcb

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Core/ImageFormats folder renamed as Core/Images
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 04 Sep 2015 16:36:18 +0200
parents Core/ImageFormats/JpegReader.cpp@2dff2bdffdb8
children b1291df2f780
comparison
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1611:5e9b2aac8b89 1612:96582230ddcb
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2015 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
40 namespace Orthanc
41 {
42 static void Uncompress(struct jpeg_decompress_struct& cinfo,
43 std::string& content,
44 ImageAccessor& accessor)
45 {
46 jpeg_read_header(&cinfo, TRUE);
47 jpeg_start_decompress(&cinfo);
48
49 PixelFormat format;
50 if (cinfo.output_components == 1 &&
51 cinfo.out_color_space == JCS_GRAYSCALE)
52 {
53 format = PixelFormat_Grayscale8;
54 }
55 else if (cinfo.output_components == 3 &&
56 cinfo.out_color_space == JCS_RGB)
57 {
58 format = PixelFormat_RGB24;
59 }
60 else
61 {
62 throw OrthancException(ErrorCode_NotImplemented);
63 }
64
65 unsigned int pitch = cinfo.output_width * cinfo.output_components;
66
67 /* Make a one-row-high sample array that will go away when done with image */
68 JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1);
69
70 try
71 {
72 content.resize(pitch * cinfo.output_height);
73 }
74 catch (...)
75 {
76 throw OrthancException(ErrorCode_NotEnoughMemory);
77 }
78
79 accessor.AssignWritable(format, cinfo.output_width, cinfo.output_height, pitch,
80 content.empty() ? NULL : &content[0]);
81
82 uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]);
83 while (cinfo.output_scanline < cinfo.output_height)
84 {
85 jpeg_read_scanlines(&cinfo, buffer, 1);
86 memcpy(target, buffer[0], pitch);
87 target += pitch;
88 }
89
90 // Everything went fine, "setjmp()" didn't get called
91
92 jpeg_finish_decompress(&cinfo);
93 }
94
95
96 void JpegReader::ReadFromFile(const char* filename)
97 {
98 FILE* fp = fopen(filename, "rb");
99 if (!fp)
100 {
101 throw OrthancException(ErrorCode_InexistentFile);
102 }
103
104 struct jpeg_decompress_struct cinfo;
105 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
106
107 Internals::JpegErrorManager jerr;
108 cinfo.err = jerr.GetPublic();
109
110 if (setjmp(jerr.GetJumpBuffer()))
111 {
112 jpeg_destroy_decompress(&cinfo);
113 fclose(fp);
114 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
115 throw OrthancException(ErrorCode_InternalError);
116 }
117
118 // Below this line, we are under the scope of a "setjmp"
119
120 jpeg_create_decompress(&cinfo);
121 jpeg_stdio_src(&cinfo, fp);
122
123 try
124 {
125 Uncompress(cinfo, content_, *this);
126 }
127 catch (OrthancException&)
128 {
129 jpeg_destroy_decompress(&cinfo);
130 fclose(fp);
131 throw;
132 }
133
134 jpeg_destroy_decompress(&cinfo);
135 fclose(fp);
136 }
137
138
139 void JpegReader::ReadFromMemory(const void* buffer,
140 size_t size)
141 {
142 struct jpeg_decompress_struct cinfo;
143 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
144
145 Internals::JpegErrorManager jerr;
146 cinfo.err = jerr.GetPublic();
147
148 if (setjmp(jerr.GetJumpBuffer()))
149 {
150 jpeg_destroy_decompress(&cinfo);
151 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
152 throw OrthancException(ErrorCode_InternalError);
153 }
154
155 // Below this line, we are under the scope of a "setjmp"
156 jpeg_create_decompress(&cinfo);
157 jpeg_mem_src(&cinfo, const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer)), size);
158
159 try
160 {
161 Uncompress(cinfo, content_, *this);
162 }
163 catch (OrthancException&)
164 {
165 jpeg_destroy_decompress(&cinfo);
166 throw;
167 }
168
169 jpeg_destroy_decompress(&cinfo);
170 }
171
172
173 void JpegReader::ReadFromMemory(const std::string& buffer)
174 {
175 if (buffer.empty())
176 {
177 ReadFromMemory(NULL, 0);
178 }
179 else
180 {
181 ReadFromMemory(buffer.c_str(), buffer.size());
182 }
183 }
184 }