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1604
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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 "../PrecompiledHeaders.h"
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34 #include "JpegReader.h"
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35
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36 #include "JpegErrorManager.h"
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37 #include "../OrthancException.h"
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38 #include "../Logging.h"
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39
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40 namespace Orthanc
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41 {
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42 JpegReader::JpegReader()
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43 {
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44 }
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45
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46
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47 static void Uncompress(struct jpeg_decompress_struct& cinfo,
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48 std::string& content,
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49 ImageAccessor& accessor)
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50 {
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51 jpeg_read_header(&cinfo, TRUE);
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52 jpeg_start_decompress(&cinfo);
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53
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54 PixelFormat format;
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55 if (cinfo.output_components == 1 &&
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56 cinfo.out_color_space == JCS_GRAYSCALE)
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57 {
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58 format = PixelFormat_Grayscale8;
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59 }
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60 else if (cinfo.output_components == 3 &&
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61 cinfo.out_color_space == JCS_RGB)
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62 {
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63 format = PixelFormat_RGB24;
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64 }
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65 else
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66 {
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67 throw OrthancException(ErrorCode_NotImplemented);
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68 }
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69
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70 unsigned int pitch = cinfo.output_width * cinfo.output_components;
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71
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72 /* Make a one-row-high sample array that will go away when done with image */
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73 JSAMPARRAY buffer = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, pitch, 1);
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74
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75 try
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76 {
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77 content.resize(pitch * cinfo.output_height);
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78 }
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79 catch (...)
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80 {
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81 throw OrthancException(ErrorCode_NotEnoughMemory);
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82 }
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83
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84 accessor.AssignReadOnly(format, cinfo.output_width, cinfo.output_height, pitch,
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85 content.empty() ? NULL : content.c_str());
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86
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87 uint8_t* target = reinterpret_cast<uint8_t*>(&content[0]);
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88 while (cinfo.output_scanline < cinfo.output_height)
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89 {
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90 jpeg_read_scanlines(&cinfo, buffer, 1);
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91 memcpy(target, buffer[0], pitch);
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92 target += pitch;
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93 }
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94
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95 // Everything went fine, "setjmp()" didn't get called
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96
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97 jpeg_finish_decompress(&cinfo);
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98 }
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99
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100
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101 void JpegReader::ReadFromFile(const char* filename)
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102 {
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103 FILE* fp = fopen(filename, "rb");
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104 if (!fp)
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105 {
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106 throw OrthancException(ErrorCode_InexistentFile);
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107 }
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108
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109 struct jpeg_decompress_struct cinfo;
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110 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
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111
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112 Internals::JpegErrorManager jerr;
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113 cinfo.err = jerr.GetPublic();
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114
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115 if (setjmp(jerr.GetJumpBuffer()))
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116 {
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117 jpeg_destroy_decompress(&cinfo);
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118 fclose(fp);
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119 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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120 throw OrthancException(ErrorCode_InternalError);
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121 }
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122
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123 // Below this line, we are under the scope of a "setjmp"
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124
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125 jpeg_create_decompress(&cinfo);
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126 jpeg_stdio_src(&cinfo, fp);
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127
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128 try
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129 {
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130 Uncompress(cinfo, content_, *this);
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131 }
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132 catch (OrthancException&)
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133 {
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134 jpeg_destroy_decompress(&cinfo);
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135 fclose(fp);
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136 throw;
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137 }
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138
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139 jpeg_destroy_decompress(&cinfo);
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140 fclose(fp);
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141 }
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142
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143
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144 void JpegReader::ReadFromMemory(const void* buffer,
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145 size_t size)
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146 {
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147 struct jpeg_decompress_struct cinfo;
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148 memset(&cinfo, 0, sizeof(struct jpeg_decompress_struct));
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149
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150 Internals::JpegErrorManager jerr;
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151 cinfo.err = jerr.GetPublic();
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152
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153 if (setjmp(jerr.GetJumpBuffer()))
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154 {
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155 jpeg_destroy_decompress(&cinfo);
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156 LOG(ERROR) << "Error during JPEG encoding: " << jerr.GetMessage();
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157 throw OrthancException(ErrorCode_InternalError);
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158 }
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159
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160 // Below this line, we are under the scope of a "setjmp"
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161 jpeg_create_decompress(&cinfo);
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162 jpeg_mem_src(&cinfo, const_cast<unsigned char*>(reinterpret_cast<const unsigned char*>(buffer)), size);
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163
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164 try
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165 {
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166 Uncompress(cinfo, content_, *this);
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167 }
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168 catch (OrthancException&)
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169 {
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170 jpeg_destroy_decompress(&cinfo);
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171 throw;
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172 }
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173
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174 jpeg_destroy_decompress(&cinfo);
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175 }
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176
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177
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178 void JpegReader::ReadFromMemory(const std::string& buffer)
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179 {
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180 if (buffer.empty())
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181 {
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182 ReadFromMemory(NULL, 0);
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183 }
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184 else
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185 {
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186 ReadFromMemory(buffer.c_str(), buffer.size());
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187 }
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188 }
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189 }
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