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annotate OrthancStone/Sources/Toolbox/ParsedDicomCache.cpp @ 1993:317a53d4fdc6

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 31 Oct 2022 22:19:57 +0100
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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
1871
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "ParsedDicomCache.h"
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25
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26 #include <Logging.h>
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27
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28 #include <cassert>
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29
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30
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31 namespace OrthancStone
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32 {
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33 class ParsedDicomCache::Item : public Orthanc::ICacheable
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34 {
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35 private:
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36 std::unique_ptr<Orthanc::ParsedDicomFile> dicom_;
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37 size_t fileSize_;
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38 bool hasPixelData_;
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39
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40 public:
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41 Item(Orthanc::ParsedDicomFile* dicom,
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42 size_t fileSize,
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43 bool hasPixelData) :
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44 dicom_(dicom),
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45 fileSize_(fileSize),
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46 hasPixelData_(hasPixelData)
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47 {
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48 if (dicom == NULL)
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49 {
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50 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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51 }
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52 }
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53
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54 virtual size_t GetMemoryUsage() const ORTHANC_OVERRIDE
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55 {
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56 return fileSize_;
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57 }
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58
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59 Orthanc::ParsedDicomFile& GetDicom() const
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60 {
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61 assert(dicom_.get() != NULL);
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62 return *dicom_;
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63 }
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64
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65 bool HasPixelData() const
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66 {
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67 return hasPixelData_;
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68 }
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69 };
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70
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71
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72 std::string ParsedDicomCache::GetIndex(unsigned int bucket,
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73 const std::string& bucketKey)
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74 {
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75 return boost::lexical_cast<std::string>(bucket) + "|" + bucketKey;
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76 }
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77
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78
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79 void ParsedDicomCache::Acquire(unsigned int bucket,
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80 const std::string& bucketKey,
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81 Orthanc::ParsedDicomFile* dicom,
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82 size_t fileSize,
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83 bool hasPixelData)
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84 {
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85 LOG(TRACE) << "new item stored in cache: bucket " << bucket << ", key " << bucketKey;
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86
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87 if (lowCacheSizeWarning_ < fileSize &&
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88 cache_.GetMaximumSize() > 0 &&
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89 fileSize >= cache_.GetMaximumSize())
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90 {
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91 lowCacheSizeWarning_ = fileSize;
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92 LOG(WARNING) << "The DICOM cache size should be larger: Storing a DICOM instance of "
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93 << (fileSize / (1024 * 1024)) << "MB, whereas the cache size is only "
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94 << (cache_.GetMaximumSize() / (1024 * 1024)) << "MB wide";
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95 }
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96
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97 cache_.Acquire(GetIndex(bucket, bucketKey), new Item(dicom, fileSize, hasPixelData));
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98 }
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99
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100
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101 ParsedDicomCache::Reader::Reader(ParsedDicomCache& cache,
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102 unsigned int bucket,
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103 const std::string& bucketKey) :
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104 /**
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105 * The "DcmFileFormat" object cannot be accessed from multiple
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106 * threads, even if using only getters. An unique lock (mutex) is
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107 * mandatory.
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108 **/
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109 accessor_(cache.cache_, GetIndex(bucket, bucketKey), true /* unique */)
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110 {
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111 if (accessor_.IsValid())
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112 {
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113 LOG(TRACE) << "accessing item within cache: bucket " << bucket << ", key " << bucketKey;
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114 item_ = &dynamic_cast<Item&>(accessor_.GetValue());
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115 }
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116 else
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117 {
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118 LOG(TRACE) << "missing item within cache: bucket " << bucket << ", key " << bucketKey;
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119 item_ = NULL;
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120 }
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121 }
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122
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123
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124 bool ParsedDicomCache::Reader::HasPixelData() const
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125 {
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126 if (item_ == NULL)
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127 {
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128 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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129 }
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130 else
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131 {
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132 return item_->HasPixelData();
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133 }
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134 }
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135
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136
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137 Orthanc::ParsedDicomFile& ParsedDicomCache::Reader::GetDicom() const
1124
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138 {
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139 if (item_ == NULL)
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140 {
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141 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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142 }
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143 else
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144 {
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145 return item_->GetDicom();
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146 }
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147 }
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148
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149
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150 size_t ParsedDicomCache::Reader::GetFileSize() const
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151 {
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152 if (item_ == NULL)
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153 {
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154 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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155 }
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156 else
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157 {
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158 return item_->GetMemoryUsage();
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159 }
1116
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160 }
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161 }