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comparison Core/ImageFormats/JpegWriter.cpp @ 1602:292bce3f54ed

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JpegWriter
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 01 Sep 2015 13:06:39 +0200
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children 1f5d6a2f9638
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1601:6cccf1da35c6 1602:292bce3f54ed
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 "JpegWriter.h"
34
35 #include "../OrthancException.h"
36 #include "../Logging.h"
37
38 #include <jpeglib.h>
39 #include <setjmp.h>
40 #include <stdio.h>
41 #include <vector>
42 #include <string.h>
43 #include <stdlib.h>
44
45 namespace Orthanc
46 {
47 namespace
48 {
49 class ErrorManager
50 {
51 private:
52 struct jpeg_error_mgr pub; /* "public" fields */
53 jmp_buf setjmp_buffer; /* for return to caller */
54 std::string message;
55
56 static void OutputMessage(j_common_ptr cinfo)
57 {
58 char message[JMSG_LENGTH_MAX];
59 (*cinfo->err->format_message) (cinfo, message);
60
61 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
62 that->message = std::string(message);
63 }
64
65
66 static void ErrorExit(j_common_ptr cinfo)
67 {
68 (*cinfo->err->output_message) (cinfo);
69
70 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
71 longjmp(that->setjmp_buffer, 1);
72 }
73
74
75 public:
76 ErrorManager()
77 {
78 memset(&pub, 0, sizeof(struct jpeg_error_mgr));
79 memset(&setjmp_buffer, 0, sizeof(jmp_buf));
80
81 jpeg_std_error(&pub);
82 pub.error_exit = ErrorExit;
83 pub.output_message = OutputMessage;
84 }
85
86 struct jpeg_error_mgr* GetPublic()
87 {
88 return &pub;
89 }
90
91 jmp_buf& GetJumpBuffer()
92 {
93 return setjmp_buffer;
94 }
95
96 const std::string& GetMessage() const
97 {
98 return message;
99 }
100 };
101 }
102
103
104 static void GetLines(std::vector<uint8_t*>& lines,
105 unsigned int height,
106 unsigned int pitch,
107 PixelFormat format,
108 const void* buffer)
109 {
110 if (format != PixelFormat_Grayscale8 &&
111 format != PixelFormat_RGB24)
112 {
113 throw OrthancException(ErrorCode_ParameterOutOfRange);
114 }
115
116 lines.resize(height);
117
118 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
119 for (unsigned int y = 0; y < height; y++)
120 {
121 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
122 }
123 }
124
125
126 static void Compress(struct jpeg_compress_struct& cinfo,
127 std::vector<uint8_t*>& lines,
128 unsigned int width,
129 unsigned int height,
130 PixelFormat format,
131 int quality)
132 {
133 cinfo.image_width = width;
134 cinfo.image_height = height;
135
136 switch (format)
137 {
138 case PixelFormat_Grayscale8:
139 cinfo.input_components = 1;
140 cinfo.in_color_space = JCS_GRAYSCALE;
141 break;
142
143 case PixelFormat_RGB24:
144 cinfo.input_components = 3;
145 cinfo.in_color_space = JCS_RGB;
146 break;
147
148 default:
149 throw OrthancException(ErrorCode_InternalError);
150 }
151
152 jpeg_set_defaults(&cinfo);
153 jpeg_set_quality(&cinfo, quality, TRUE);
154 jpeg_start_compress(&cinfo, TRUE);
155 jpeg_write_scanlines(&cinfo, &lines[0], height);
156 jpeg_finish_compress(&cinfo);
157 jpeg_destroy_compress(&cinfo);
158 }
159
160
161 void JpegWriter::SetQuality(uint8_t quality)
162 {
163 if (quality <= 0 || quality > 100)
164 {
165 throw OrthancException(ErrorCode_ParameterOutOfRange);
166 }
167
168 quality_ = quality;
169 }
170
171
172 void JpegWriter::WriteToFile(const char* filename,
173 unsigned int width,
174 unsigned int height,
175 unsigned int pitch,
176 PixelFormat format,
177 const void* buffer)
178 {
179 FILE* fp = fopen(filename, "wb");
180 if (fp == NULL)
181 {
182 throw OrthancException(ErrorCode_FullStorage);
183 }
184
185 std::vector<uint8_t*> lines;
186 GetLines(lines, height, pitch, format, buffer);
187
188 struct jpeg_compress_struct cinfo;
189 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
190
191 ErrorManager jerr;
192 cinfo.err = jerr.GetPublic();
193
194 if (setjmp(jerr.GetJumpBuffer()))
195 {
196 /* If we get here, the JPEG code has signaled an error.
197 * We need to clean up the JPEG object, close the input file, and return.
198 */
199 jpeg_destroy_compress(&cinfo);
200 fclose(fp);
201 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
202 throw OrthancException(ErrorCode_InternalError);
203 }
204
205 // Do not allocate data on the stack below this line!
206
207 jpeg_create_compress(&cinfo);
208 jpeg_stdio_dest(&cinfo, fp);
209 Compress(cinfo, lines, width, height, format, quality_);
210
211 // Everything went fine, "setjmp()" didn't get called
212
213 fclose(fp);
214 }
215
216
217 void JpegWriter::WriteToMemory(std::string& jpeg,
218 unsigned int width,
219 unsigned int height,
220 unsigned int pitch,
221 PixelFormat format,
222 const void* buffer)
223 {
224 std::vector<uint8_t*> lines;
225 GetLines(lines, height, pitch, format, buffer);
226
227 struct jpeg_compress_struct cinfo;
228 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
229
230 ErrorManager jerr;
231
232 unsigned char* data = NULL;
233 unsigned long size;
234
235 if (setjmp(jerr.GetJumpBuffer()))
236 {
237 jpeg_destroy_compress(&cinfo);
238
239 if (data != NULL)
240 {
241 free(data);
242 }
243
244 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
245 throw OrthancException(ErrorCode_InternalError);
246 }
247
248 // Do not allocate data on the stack below this line!
249
250 jpeg_create_compress(&cinfo);
251 cinfo.err = jerr.GetPublic();
252 jpeg_mem_dest(&cinfo, &data, &size);
253
254 Compress(cinfo, lines, width, height, format, quality_);
255
256 // Everything went fine, "setjmp()" didn't get called
257
258 jpeg.assign(reinterpret_cast<const char*>(data), size);
259 free(data);
260 }
261 }