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annotate OrthancStone/Sources/Toolbox/ParsedDicomCache.cpp @ 1739:9ac2a65d4172

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
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children 3889ae96d2e9
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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 * 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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22
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23 #include "ParsedDicomCache.h"
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24
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25 #include <Logging.h>
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26
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27 #include <cassert>
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28
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29
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30 namespace OrthancStone
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31 {
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32 class ParsedDicomCache::Item : public Orthanc::ICacheable
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33 {
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34 private:
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35 std::unique_ptr<Orthanc::ParsedDicomFile> dicom_;
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36 size_t fileSize_;
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37 bool hasPixelData_;
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38
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39 public:
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40 Item(Orthanc::ParsedDicomFile* dicom,
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41 size_t fileSize,
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42 bool hasPixelData) :
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43 dicom_(dicom),
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44 fileSize_(fileSize),
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45 hasPixelData_(hasPixelData)
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46 {
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47 if (dicom == NULL)
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48 {
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49 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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50 }
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51 }
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52
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53 virtual size_t GetMemoryUsage() const ORTHANC_OVERRIDE
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54 {
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55 return fileSize_;
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56 }
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57
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58 Orthanc::ParsedDicomFile& GetDicom() const
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59 {
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60 assert(dicom_.get() != NULL);
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61 return *dicom_;
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62 }
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63
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64 bool HasPixelData() const
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65 {
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66 return hasPixelData_;
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67 }
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68 };
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70
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71 std::string ParsedDicomCache::GetIndex(unsigned int bucket,
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72 const std::string& bucketKey)
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73 {
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74 return boost::lexical_cast<std::string>(bucket) + "|" + bucketKey;
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75 }
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76
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77
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78 void ParsedDicomCache::Acquire(unsigned int bucket,
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79 const std::string& bucketKey,
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80 Orthanc::ParsedDicomFile* dicom,
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81 size_t fileSize,
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82 bool hasPixelData)
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83 {
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84 LOG(TRACE) << "new item stored in cache: bucket " << bucket << ", key " << bucketKey;
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85
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86 if (lowCacheSizeWarning_ < fileSize &&
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87 cache_.GetMaximumSize() > 0 &&
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88 fileSize >= cache_.GetMaximumSize())
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89 {
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90 lowCacheSizeWarning_ = fileSize;
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91 LOG(WARNING) << "The DICOM cache size should be larger: Storing a DICOM instance of "
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92 << (fileSize / (1024 * 1024)) << "MB, whereas the cache size is only "
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93 << (cache_.GetMaximumSize() / (1024 * 1024)) << "MB wide";
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94 }
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95
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96 cache_.Acquire(GetIndex(bucket, bucketKey), new Item(dicom, fileSize, hasPixelData));
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97 }
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98
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99
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100 ParsedDicomCache::Reader::Reader(ParsedDicomCache& cache,
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101 unsigned int bucket,
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102 const std::string& bucketKey) :
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103 /**
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104 * The "DcmFileFormat" object cannot be accessed from multiple
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105 * threads, even if using only getters. An unique lock (mutex) is
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106 * mandatory.
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107 **/
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108 accessor_(cache.cache_, GetIndex(bucket, bucketKey), true /* unique */)
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109 {
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110 if (accessor_.IsValid())
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111 {
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112 LOG(TRACE) << "accessing item within cache: bucket " << bucket << ", key " << bucketKey;
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113 item_ = &dynamic_cast<Item&>(accessor_.GetValue());
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114 }
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115 else
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116 {
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117 LOG(TRACE) << "missing item within cache: bucket " << bucket << ", key " << bucketKey;
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118 item_ = NULL;
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119 }
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120 }
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121
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122
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123 bool ParsedDicomCache::Reader::HasPixelData() const
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124 {
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125 if (item_ == NULL)
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126 {
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127 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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128 }
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129 else
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130 {
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131 return item_->HasPixelData();
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132 }
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133 }
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134
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135
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136 Orthanc::ParsedDicomFile& ParsedDicomCache::Reader::GetDicom() const
1124
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137 {
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138 if (item_ == NULL)
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139 {
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140 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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141 }
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142 else
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143 {
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144 return item_->GetDicom();
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145 }
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146 }
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147
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148
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149 size_t ParsedDicomCache::Reader::GetFileSize() const
1124
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150 {
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151 if (item_ == NULL)
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152 {
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153 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
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154 }
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155 else
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156 {
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157 return item_->GetMemoryUsage();
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158 }
1116
a08699daf78b ParsedDicomFileCache
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159 }
a08699daf78b ParsedDicomFileCache
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160 }