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1602
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "JpegWriter.h"
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34
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35 #include "../OrthancException.h"
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36 #include "../Logging.h"
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37
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38 #include <jpeglib.h>
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39 #include <setjmp.h>
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40 #include <stdio.h>
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41 #include <vector>
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42 #include <string.h>
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43 #include <stdlib.h>
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44
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45 namespace Orthanc
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46 {
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47 namespace
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48 {
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49 class ErrorManager
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50 {
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51 private:
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52 struct jpeg_error_mgr pub; /* "public" fields */
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53 jmp_buf setjmp_buffer; /* for return to caller */
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54 std::string message;
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55
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56 static void OutputMessage(j_common_ptr cinfo)
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57 {
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58 char message[JMSG_LENGTH_MAX];
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59 (*cinfo->err->format_message) (cinfo, message);
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60
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61 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
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62 that->message = std::string(message);
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63 }
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64
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65
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66 static void ErrorExit(j_common_ptr cinfo)
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67 {
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68 (*cinfo->err->output_message) (cinfo);
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69
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70 ErrorManager* that = reinterpret_cast<ErrorManager*>(cinfo->err);
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71 longjmp(that->setjmp_buffer, 1);
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72 }
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73
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74
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75 public:
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76 ErrorManager()
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77 {
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78 memset(&pub, 0, sizeof(struct jpeg_error_mgr));
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79 memset(&setjmp_buffer, 0, sizeof(jmp_buf));
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80
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81 jpeg_std_error(&pub);
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82 pub.error_exit = ErrorExit;
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83 pub.output_message = OutputMessage;
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84 }
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85
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86 struct jpeg_error_mgr* GetPublic()
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87 {
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88 return &pub;
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89 }
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90
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91 jmp_buf& GetJumpBuffer()
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92 {
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93 return setjmp_buffer;
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94 }
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95
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96 const std::string& GetMessage() const
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97 {
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98 return message;
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99 }
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100 };
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101 }
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102
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103
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104 static void GetLines(std::vector<uint8_t*>& lines,
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105 unsigned int height,
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106 unsigned int pitch,
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107 PixelFormat format,
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108 const void* buffer)
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109 {
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110 if (format != PixelFormat_Grayscale8 &&
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111 format != PixelFormat_RGB24)
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112 {
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113 throw OrthancException(ErrorCode_ParameterOutOfRange);
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114 }
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115
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116 lines.resize(height);
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117
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118 uint8_t* base = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(buffer));
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119 for (unsigned int y = 0; y < height; y++)
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120 {
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121 lines[y] = base + static_cast<intptr_t>(y) * static_cast<intptr_t>(pitch);
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122 }
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123 }
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124
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125
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126 static void Compress(struct jpeg_compress_struct& cinfo,
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127 std::vector<uint8_t*>& lines,
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128 unsigned int width,
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129 unsigned int height,
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130 PixelFormat format,
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131 int quality)
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132 {
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133 cinfo.image_width = width;
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134 cinfo.image_height = height;
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135
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136 switch (format)
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137 {
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138 case PixelFormat_Grayscale8:
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139 cinfo.input_components = 1;
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140 cinfo.in_color_space = JCS_GRAYSCALE;
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141 break;
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142
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143 case PixelFormat_RGB24:
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144 cinfo.input_components = 3;
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145 cinfo.in_color_space = JCS_RGB;
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146 break;
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147
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148 default:
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149 throw OrthancException(ErrorCode_InternalError);
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150 }
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151
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152 jpeg_set_defaults(&cinfo);
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153 jpeg_set_quality(&cinfo, quality, TRUE);
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154 jpeg_start_compress(&cinfo, TRUE);
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155 jpeg_write_scanlines(&cinfo, &lines[0], height);
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156 jpeg_finish_compress(&cinfo);
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157 jpeg_destroy_compress(&cinfo);
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158 }
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159
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160
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161 void JpegWriter::SetQuality(uint8_t quality)
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162 {
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163 if (quality <= 0 || quality > 100)
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164 {
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165 throw OrthancException(ErrorCode_ParameterOutOfRange);
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166 }
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167
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168 quality_ = quality;
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169 }
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170
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171
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172 void JpegWriter::WriteToFile(const char* filename,
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173 unsigned int width,
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174 unsigned int height,
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175 unsigned int pitch,
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176 PixelFormat format,
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177 const void* buffer)
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178 {
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179 FILE* fp = fopen(filename, "wb");
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180 if (fp == NULL)
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181 {
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182 throw OrthancException(ErrorCode_FullStorage);
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183 }
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184
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185 std::vector<uint8_t*> lines;
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186 GetLines(lines, height, pitch, format, buffer);
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187
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188 struct jpeg_compress_struct cinfo;
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189 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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190
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191 ErrorManager jerr;
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192 cinfo.err = jerr.GetPublic();
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193
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194 if (setjmp(jerr.GetJumpBuffer()))
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195 {
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196 /* If we get here, the JPEG code has signaled an error.
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197 * We need to clean up the JPEG object, close the input file, and return.
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198 */
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199 jpeg_destroy_compress(&cinfo);
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200 fclose(fp);
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201 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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202 throw OrthancException(ErrorCode_InternalError);
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203 }
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204
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205 // Do not allocate data on the stack below this line!
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206
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207 jpeg_create_compress(&cinfo);
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208 jpeg_stdio_dest(&cinfo, fp);
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209 Compress(cinfo, lines, width, height, format, quality_);
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210
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211 // Everything went fine, "setjmp()" didn't get called
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212
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213 fclose(fp);
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214 }
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215
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216
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217 void JpegWriter::WriteToMemory(std::string& jpeg,
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218 unsigned int width,
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219 unsigned int height,
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220 unsigned int pitch,
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221 PixelFormat format,
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222 const void* buffer)
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223 {
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224 std::vector<uint8_t*> lines;
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225 GetLines(lines, height, pitch, format, buffer);
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226
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227 struct jpeg_compress_struct cinfo;
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228 memset(&cinfo, 0, sizeof(struct jpeg_compress_struct));
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229
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230 ErrorManager jerr;
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231
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232 unsigned char* data = NULL;
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233 unsigned long size;
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234
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235 if (setjmp(jerr.GetJumpBuffer()))
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236 {
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237 jpeg_destroy_compress(&cinfo);
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238
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239 if (data != NULL)
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240 {
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241 free(data);
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242 }
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243
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244 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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245 throw OrthancException(ErrorCode_InternalError);
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246 }
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247
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248 // Do not allocate data on the stack below this line!
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249
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250 jpeg_create_compress(&cinfo);
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251 cinfo.err = jerr.GetPublic();
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252 jpeg_mem_dest(&cinfo, &data, &size);
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253
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254 Compress(cinfo, lines, width, height, format, quality_);
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255
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256 // Everything went fine, "setjmp()" didn't get called
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257
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258 jpeg.assign(reinterpret_cast<const char*>(data), size);
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259 free(data);
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260 }
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261 }
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