Mercurial > hg > orthanc-webviewer
annotate Plugin/ViewerPrefetchPolicy.cpp @ 316:591ca447ebf8
Upgrade to Orthanc framework 1.12.3
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 26 Mar 2024 11:15:27 +0100 |
parents | 0a1ad7492050 |
children | 553fa466835a |
rev | line source |
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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 |
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5 * Copyright (C) 2017-2024 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 |