Mercurial > hg > orthanc-webviewer
annotate Plugin/ViewerPrefetchPolicy.cpp @ 314:0a1ad7492050
update year to 2024
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 22 Mar 2024 15:45:07 +0100 |
| parents | fb7d62e3235e |
| children | 591ca447ebf8 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 122 | 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
| 0 | 4 * Department, University Hospital of Liege, Belgium |
| 303 | 5 * Copyright (C) 2017-2022 Osimis S.A., Belgium |
|
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6 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 0 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
| 9 * modify it under the terms of the GNU Affero General Public License | |
| 10 * as published by the Free Software Foundation, either version 3 of | |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 * Affero General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU Affero General Public License | |
| 19 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 **/ | |
| 21 | |
| 22 | |
| 23 #include "ViewerPrefetchPolicy.h" | |
| 24 | |
| 25 #include "ViewerToolbox.h" | |
| 26 #include "Cache/CacheScheduler.h" | |
| 27 | |
|
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28 #include <Toolbox.h> |
| 0 | 29 |
| 30 | |
| 31 static const Json::Value::ArrayIndex PREFETCH_FORWARD = 10; | |
| 32 static const Json::Value::ArrayIndex PREFETCH_BACKWARD = 3; | |
| 33 | |
| 34 | |
| 35 namespace OrthancPlugins | |
| 36 { | |
| 37 void ViewerPrefetchPolicy::ApplySeries(std::list<CacheIndex>& toPrefetch, | |
| 38 CacheScheduler& cache, | |
| 39 const std::string& series, | |
| 40 const std::string& content) | |
| 41 { | |
| 42 Json::Value json; | |
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43 if (!Orthanc::Toolbox::ReadJson(json, content) || |
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44 !json.isMember("Slices")) |
| 0 | 45 { |
| 46 return; | |
| 47 } | |
| 48 | |
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49 const Json::Value& instances = json["Slices"]; |
| 0 | 50 if (instances.type() != Json::arrayValue) |
| 51 { | |
| 52 return; | |
| 53 } | |
| 54 | |
| 55 for (Json::Value::ArrayIndex i = 0; | |
| 56 i < instances.size() && i < PREFETCH_FORWARD; | |
| 57 i++) | |
| 58 { | |
| 59 std::string item = "jpeg95-" + instances[i].asString(); | |
| 60 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 | |
| 65 void ViewerPrefetchPolicy::ApplyInstance(std::list<CacheIndex>& toPrefetch, | |
| 66 CacheScheduler& cache, | |
| 67 const std::string& path) | |
| 68 { | |
| 69 size_t separator = path.find('-'); | |
| 70 if (separator == std::string::npos) | |
| 71 { | |
| 72 return; | |
| 73 } | |
| 74 | |
| 75 std::string compression = path.substr(0, separator + 1); | |
| 101 | 76 std::string instanceAndFrame = path.substr(separator + 1); |
| 0 | 77 |
| 101 | 78 std::string instanceId = instanceAndFrame.substr(0, instanceAndFrame.find('_')); |
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79 |
| 0 | 80 Json::Value instance; |
| 81 if (!GetJsonFromOrthanc(instance, context_, "/instances/" + instanceId) || | |
| 82 !instance.isMember("ParentSeries")) | |
| 83 { | |
| 84 return; | |
| 85 } | |
| 86 | |
| 87 std::string tmp; | |
| 88 if (!cache.Access(tmp, CacheBundle_SeriesInformation, instance["ParentSeries"].asString())) | |
| 89 { | |
| 90 return; | |
| 91 } | |
| 92 | |
| 93 Json::Value series; | |
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94 if (!Orthanc::Toolbox::ReadJson(series, tmp) || |
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95 !series.isMember("Slices")) |
| 0 | 96 { |
| 97 return; | |
| 98 } | |
| 99 | |
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100 const Json::Value& instances = series["Slices"]; |
| 101 | 101 |
| 0 | 102 if (instances.type() != Json::arrayValue) |
| 103 { | |
| 104 return; | |
| 105 } | |
| 106 | |
| 107 Json::Value::ArrayIndex position = 0; | |
| 108 while (position < instances.size()) | |
| 109 { | |
| 101 | 110 if (instances[position] == instanceAndFrame) |
| 0 | 111 { |
| 112 break; | |
| 113 } | |
| 114 | |
| 115 position++; | |
| 116 } | |
| 117 | |
| 118 if (position == instances.size()) | |
| 119 { | |
| 120 return; | |
| 121 } | |
| 122 | |
| 123 for (Json::Value::ArrayIndex i = position; | |
| 124 i < instances.size() && i < position + PREFETCH_FORWARD; | |
| 125 i++) | |
| 126 { | |
| 127 std::string item = compression + instances[i].asString(); | |
| 128 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
| 129 } | |
| 130 | |
| 131 for (Json::Value::ArrayIndex i = position; | |
| 132 i >= 0 && i > position - PREFETCH_BACKWARD; ) | |
| 133 { | |
| 134 i--; | |
| 135 std::string item = compression + instances[i].asString(); | |
| 136 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 | |
| 141 void ViewerPrefetchPolicy::Apply(std::list<CacheIndex>& toPrefetch, | |
| 142 CacheScheduler& cache, | |
| 143 const CacheIndex& accessed, | |
| 144 const std::string& content) | |
| 145 { | |
| 146 switch (accessed.GetBundle()) | |
| 147 { | |
| 148 case CacheBundle_SeriesInformation: | |
| 149 ApplySeries(toPrefetch, cache, accessed.GetItem(), content); | |
| 150 return; | |
| 151 | |
| 152 case CacheBundle_DecodedImage: | |
| 153 ApplyInstance(toPrefetch, cache, accessed.GetItem()); | |
| 154 return; | |
| 155 | |
| 156 default: | |
| 157 return; | |
| 158 } | |
| 159 } | |
| 160 } | |
| 161 |