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39
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 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 "DicomDataset.h"
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34
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35 #include "../../Resources/Orthanc/Core/OrthancException.h"
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36 #include "../../Resources/Orthanc/Core/Logging.h"
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37 #include "../../Resources/Orthanc/Core/Toolbox.h"
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38
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39 #include <boost/lexical_cast.hpp>
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40 #include <json/value.h>
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41 #include <json/reader.h>
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42
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43 namespace OrthancStone
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44 {
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45 static uint16_t GetCharValue(char c)
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46 {
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47 if (c >= '0' && c <= '9')
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48 return c - '0';
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49 else if (c >= 'a' && c <= 'f')
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50 return c - 'a' + 10;
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51 else if (c >= 'A' && c <= 'F')
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52 return c - 'A' + 10;
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53 else
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54 return 0;
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55 }
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56
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57
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58 static uint16_t GetHexadecimalValue(const char* c)
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59 {
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60 return ((GetCharValue(c[0]) << 12) +
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61 (GetCharValue(c[1]) << 8) +
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62 (GetCharValue(c[2]) << 4) +
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63 GetCharValue(c[3]));
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64 }
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65
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66
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67 static DicomDataset::Tag ParseTag(const std::string& tag)
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68 {
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69 if (tag.size() == 9 &&
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70 isxdigit(tag[0]) &&
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71 isxdigit(tag[1]) &&
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72 isxdigit(tag[2]) &&
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73 isxdigit(tag[3]) &&
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74 (tag[4] == '-' || tag[4] == ',') &&
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75 isxdigit(tag[5]) &&
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76 isxdigit(tag[6]) &&
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77 isxdigit(tag[7]) &&
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78 isxdigit(tag[8]))
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79 {
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80 uint16_t group = GetHexadecimalValue(tag.c_str());
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81 uint16_t element = GetHexadecimalValue(tag.c_str() + 5);
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82 return std::make_pair(group, element);
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83 }
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84 else if (tag.size() == 8 &&
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85 isxdigit(tag[0]) &&
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86 isxdigit(tag[1]) &&
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87 isxdigit(tag[2]) &&
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88 isxdigit(tag[3]) &&
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89 isxdigit(tag[4]) &&
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90 isxdigit(tag[5]) &&
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91 isxdigit(tag[6]) &&
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92 isxdigit(tag[7]))
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93 {
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94 uint16_t group = GetHexadecimalValue(tag.c_str());
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95 uint16_t element = GetHexadecimalValue(tag.c_str() + 4);
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96 return std::make_pair(group, element);
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97 }
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98 else
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99 {
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100 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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101 }
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102 }
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103
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104 void DicomDataset::Parse(const std::string& content)
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105 {
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106 Json::Value json;
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107 Json::Reader reader;
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108 if (!reader.parse(content, json))
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109 {
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110 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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111 }
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112
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113 Parse(json);
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114 }
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115
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116
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117 void DicomDataset::Parse(const Json::Value& content)
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118 {
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119 if (content.type() != Json::objectValue)
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120 {
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121 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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122 }
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123
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124 Json::Value::Members members = content.getMemberNames();
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125 for (size_t i = 0; i < members.size(); i++)
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126 {
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127 Tag tag = ParseTag(members[i]);
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128
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129 const Json::Value& item = content[members[i]];
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130
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131 if (item.type() != Json::objectValue ||
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132 !item.isMember("Type") ||
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133 !item.isMember("Value") ||
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134 !item.isMember("Name") ||
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135 item["Type"].type() != Json::stringValue ||
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136 item["Name"].type() != Json::stringValue)
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137 {
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138 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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139 }
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140
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141 if (item["Type"].asString() == "String")
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142 {
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143 if (item["Value"].type() == Json::stringValue)
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144 {
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145 values_[tag] = item["Value"].asString();
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146 }
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147 else
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148 {
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149 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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150 }
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151 }
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152 }
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153 }
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154
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155
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156 DicomDataset::DicomDataset(OrthancPlugins::IOrthancConnection& orthanc,
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157 const std::string& instanceId)
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158 {
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159 std::string content;
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160 orthanc.RestApiGet(content, "/instances/" + instanceId + "/tags");
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161
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162 Parse(content);
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163 }
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164
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165
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166 std::string DicomDataset::GetStringValue(const Tag& tag) const
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167 {
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168 Values::const_iterator it = values_.find(tag);
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169
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170 if (it == values_.end())
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171 {
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172 LOG(ERROR) << "Trying to access a DICOM tag that is not set in a DICOM dataset";
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173 throw Orthanc::OrthancException(Orthanc::ErrorCode_InexistentItem);
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174 }
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175 else
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176 {
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177 return it->second;
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178 }
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179 }
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180
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181
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182 std::string DicomDataset::GetStringValue(const Tag& tag,
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183 const std::string& defaultValue) const
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184 {
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185 Values::const_iterator it = values_.find(tag);
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186
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187 if (it == values_.end())
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188 {
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189 return defaultValue;
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190 }
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191 else
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192 {
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193 return it->second;
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194 }
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195 }
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196
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197
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198 float DicomDataset::GetFloatValue(const Tag& tag) const
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199 {
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200 try
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201 {
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202 return boost::lexical_cast<float>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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203 }
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204 catch (boost::bad_lexical_cast&)
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205 {
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206 LOG(ERROR) << "Trying to access a DICOM tag that is not a float";
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207 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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208 }
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209 }
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210
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211
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212 double DicomDataset::GetDoubleValue(const Tag& tag) const
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213 {
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214 try
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215 {
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216 return boost::lexical_cast<double>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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217 }
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218 catch (boost::bad_lexical_cast&)
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219 {
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220 LOG(ERROR) << "Trying to access a DICOM tag that is not a float";
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221 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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222 }
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223 }
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224
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225
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226 int DicomDataset::GetIntegerValue(const Tag& tag) const
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227 {
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228 try
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229 {
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230 return boost::lexical_cast<int>(Orthanc::Toolbox::StripSpaces(GetStringValue(tag)));
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231 }
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232 catch (boost::bad_lexical_cast&)
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233 {
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234 LOG(ERROR) << "Trying to access a DICOM tag that is not an integer";
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235 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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236 }
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237 }
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238
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239
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240 unsigned int DicomDataset::GetUnsignedIntegerValue(const Tag& tag) const
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241 {
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242 int v = GetIntegerValue(tag);
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243
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244 if (v < 0)
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245 {
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246 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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247 }
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248 else
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249 {
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250 return static_cast<unsigned int>(v);
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251 }
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252 }
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253
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254
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255 void DicomDataset::GetVectorValue(Vector& vector,
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256 const Tag& tag) const
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257 {
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258 if (!GeometryToolbox::ParseVector(vector, Orthanc::Toolbox::StripSpaces(GetStringValue(tag))))
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259 {
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260 LOG(ERROR) << "Trying to access a DICOM tag that is not a vector";
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261 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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262 }
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263 }
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264
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265
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266 void DicomDataset::GetVectorValue(Vector& vector,
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267 const Tag& tag,
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268 size_t expectedSize) const
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269 {
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270 GetVectorValue(vector, tag);
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271
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272 if (vector.size() != expectedSize)
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273 {
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274 LOG(ERROR) << "A vector in a DICOM tag has a bad size";
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275 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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276 }
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277 }
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278
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279
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280 void DicomDataset::Print() const
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281 {
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282 for (Values::const_iterator it = values_.begin(); it != values_.end(); ++it)
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283 {
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284 printf("%04x,%04x = [%s]\n", it->first.first, it->first.second, it->second.c_str());
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285 }
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286 printf("\n");
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287 }
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288
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289
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290 bool DicomDataset::IsGrayscale() const
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291 {
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292 std::string photometric = Orthanc::Toolbox::StripSpaces(GetStringValue(DICOM_TAG_PHOTOMETRIC_INTERPRETATION));
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293
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294 return (photometric == "MONOCHROME1" ||
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295 photometric == "MONOCHROME2");
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296 }
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297
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298
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299 void DicomDataset::GetPixelSpacing(double& spacingX,
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300 double& spacingY) const
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301 {
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302 if (HasTag(DICOM_TAG_PIXEL_SPACING))
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303 {
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304 Vector spacing;
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305 GetVectorValue(spacing, DICOM_TAG_PIXEL_SPACING, 2);
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306 spacingX = spacing[0];
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307 spacingY = spacing[1];
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308 }
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309 else
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310 {
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311 spacingX = 1.0;
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312 spacingY = 1.0;
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313 }
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314 }
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315 }
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