Mercurial > hg > orthanc
annotate OrthancFramework/Sources/DicomParsing/ParsedDicomDir.cpp @ 4706:dbee8bd8ee1f
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 22 Jun 2021 09:13:03 +0200 |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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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 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
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6 * |
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7 * This program is free software: you can redistribute it and/or |
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8 * modify it under the terms of the GNU Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, but |
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Lesser General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
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20 **/ |
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21 |
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22 |
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23 #include "../PrecompiledHeaders.h" |
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24 #include "ParsedDicomDir.h" |
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25 |
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26 #include "../Compatibility.h" |
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27 #include "../OrthancException.h" |
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28 #include "ParsedDicomFile.h" |
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29 #include "FromDcmtkBridge.h" |
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30 |
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31 #include <dcmtk/dcmdata/dcdeftag.h> |
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32 |
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33 |
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34 namespace Orthanc |
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35 { |
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36 void ParsedDicomDir::Clear() |
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37 { |
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38 for (size_t i = 0; i < content_.size(); i++) |
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39 { |
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40 assert(content_[i] != NULL); |
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41 delete content_[i]; |
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42 } |
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43 } |
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46 bool ParsedDicomDir::LookupIndexOfOffset(size_t& target, |
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47 unsigned int offset) const |
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48 { |
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49 if (offset == 0) |
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50 { |
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51 return false; |
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52 } |
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53 |
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54 OffsetToIndex::const_iterator found = offsetToIndex_.find(offset); |
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55 if (found == offsetToIndex_.end()) |
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56 { |
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57 // Error in the algorithm that computes the offsets |
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58 throw OrthancException(ErrorCode_InternalError); |
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59 } |
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60 else |
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61 { |
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62 target = found->second; |
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63 return true; |
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64 } |
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65 } |
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66 |
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67 |
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69 { |
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70 ParsedDicomFile dicom(content); |
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71 |
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72 DcmSequenceOfItems* sequence = NULL; |
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73 if (dicom.GetDcmtkObject().getDataset() == NULL || |
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74 !dicom.GetDcmtkObject().getDataset()->findAndGetSequence(DCM_DirectoryRecordSequence, sequence).good() || |
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75 sequence == NULL) |
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76 { |
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77 throw OrthancException(ErrorCode_BadFileFormat, "Not a DICOMDIR"); |
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78 } |
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79 |
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80 content_.resize(sequence->card()); |
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81 nextOffsets_.resize(content_.size()); |
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82 lowerOffsets_.resize(content_.size()); |
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83 |
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84 // Manually reconstruct the list of all the available offsets of |
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85 // "DcmItem", as "fStartPosition" is a protected member in DCMTK |
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86 // API |
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87 std::set<uint32_t> availableOffsets; |
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88 availableOffsets.insert(0); |
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89 |
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90 |
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91 for (unsigned long i = 0; i < sequence->card(); i++) |
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92 { |
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93 DcmItem* item = sequence->getItem(i); |
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94 if (item == NULL) |
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95 { |
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96 Clear(); |
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97 throw OrthancException(ErrorCode_InternalError); |
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98 } |
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99 |
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101 if (!item->findAndGetUint32(DCM_OffsetOfTheNextDirectoryRecord, next).good() || |
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102 !item->findAndGetUint32(DCM_OffsetOfReferencedLowerLevelDirectoryEntity, lower).good()) |
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103 { |
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104 item->writeXML(std::cout); |
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105 throw OrthancException(ErrorCode_BadFileFormat, |
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106 "Missing offsets in DICOMDIR"); |
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107 } |
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108 |
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109 nextOffsets_[i] = next; |
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110 lowerOffsets_[i] = lower; |
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111 |
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112 std::unique_ptr<DicomMap> entry(new DicomMap); |
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113 |
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114 std::set<DicomTag> ignoreTagLength; |
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115 FromDcmtkBridge::ExtractDicomSummary(*entry, *item, 0 /* don't truncate tags */, ignoreTagLength); |
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116 |
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117 if (next != 0) |
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118 { |
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119 availableOffsets.insert(next); |
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120 } |
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121 |
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122 if (lower != 0) |
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123 { |
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124 availableOffsets.insert(lower); |
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125 } |
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126 |
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127 content_[i] = entry.release(); |
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128 } |
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129 |
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130 if (content_.size() != availableOffsets.size()) |
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131 { |
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132 throw OrthancException(ErrorCode_BadFileFormat, |
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133 "Inconsistent offsets in DICOMDIR"); |
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134 } |
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135 |
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136 unsigned int index = 0; |
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137 for (std::set<uint32_t>::const_iterator it = availableOffsets.begin(); |
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138 it != availableOffsets.end(); ++it) |
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139 { |
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140 offsetToIndex_[*it] = index; |
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141 index ++; |
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142 } |
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143 } |
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144 |
4297 | 145 ParsedDicomDir::~ParsedDicomDir() |
146 { | |
147 Clear(); | |
148 } | |
149 | |
150 size_t ParsedDicomDir::GetSize() const | |
151 { | |
152 return content_.size(); | |
153 } | |
154 | |
3554
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155 |
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156 const DicomMap& ParsedDicomDir::GetItem(size_t i) const |
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157 { |
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158 if (i >= content_.size()) |
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159 { |
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160 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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161 } |
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162 else |
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163 { |
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164 assert(content_[i] != NULL); |
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165 return *content_[i]; |
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166 } |
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167 } |
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168 |
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169 |
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170 bool ParsedDicomDir::LookupNext(size_t& target, |
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171 size_t index) const |
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172 { |
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173 if (index >= nextOffsets_.size()) |
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174 { |
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175 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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176 } |
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177 else |
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178 { |
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179 return LookupIndexOfOffset(target, nextOffsets_[index]); |
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180 } |
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181 } |
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182 |
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183 |
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184 bool ParsedDicomDir::LookupLower(size_t& target, |
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185 size_t index) const |
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186 { |
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187 if (index >= lowerOffsets_.size()) |
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188 { |
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189 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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190 } |
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191 else |
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192 { |
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193 return LookupIndexOfOffset(target, lowerOffsets_[index]); |
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194 } |
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195 } |
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196 } |