Mercurial > hg > orthanc-webviewer
annotate Plugin/ViewerPrefetchPolicy.cpp @ 209:2f27287c047c
preparing for 2019
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 24 Dec 2018 13:47:11 +0100 |
parents | 81f16c5667ba |
children | aee499712ac4 |
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 |
209 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "ViewerPrefetchPolicy.h" | |
23 | |
24 #include "ViewerToolbox.h" | |
25 #include "Cache/CacheScheduler.h" | |
26 | |
27 #include <json/value.h> | |
28 #include <json/reader.h> | |
29 | |
30 | |
31 | |
32 static const Json::Value::ArrayIndex PREFETCH_FORWARD = 10; | |
33 static const Json::Value::ArrayIndex PREFETCH_BACKWARD = 3; | |
34 | |
35 | |
36 namespace OrthancPlugins | |
37 { | |
38 void ViewerPrefetchPolicy::ApplySeries(std::list<CacheIndex>& toPrefetch, | |
39 CacheScheduler& cache, | |
40 const std::string& series, | |
41 const std::string& content) | |
42 { | |
43 Json::Value json; | |
44 Json::Reader reader; | |
45 if (!reader.parse(content, json) || | |
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parents:
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46 !json.isMember("Slices")) |
0 | 47 { |
48 return; | |
49 } | |
50 | |
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51 const Json::Value& instances = json["Slices"]; |
0 | 52 if (instances.type() != Json::arrayValue) |
53 { | |
54 return; | |
55 } | |
56 | |
57 for (Json::Value::ArrayIndex i = 0; | |
58 i < instances.size() && i < PREFETCH_FORWARD; | |
59 i++) | |
60 { | |
61 std::string item = "jpeg95-" + instances[i].asString(); | |
62 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
63 } | |
64 } | |
65 | |
66 | |
67 void ViewerPrefetchPolicy::ApplyInstance(std::list<CacheIndex>& toPrefetch, | |
68 CacheScheduler& cache, | |
69 const std::string& path) | |
70 { | |
71 size_t separator = path.find('-'); | |
72 if (separator == std::string::npos) | |
73 { | |
74 return; | |
75 } | |
76 | |
77 std::string compression = path.substr(0, separator + 1); | |
101 | 78 std::string instanceAndFrame = path.substr(separator + 1); |
0 | 79 |
101 | 80 std::string instanceId = instanceAndFrame.substr(0, instanceAndFrame.find('_')); |
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81 |
0 | 82 Json::Value instance; |
83 if (!GetJsonFromOrthanc(instance, context_, "/instances/" + instanceId) || | |
84 !instance.isMember("ParentSeries")) | |
85 { | |
86 return; | |
87 } | |
88 | |
89 std::string tmp; | |
90 if (!cache.Access(tmp, CacheBundle_SeriesInformation, instance["ParentSeries"].asString())) | |
91 { | |
92 return; | |
93 } | |
94 | |
95 Json::Value series; | |
96 Json::Reader reader; | |
97 if (!reader.parse(tmp, series) || | |
99
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
changeset
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98 !series.isMember("Slices")) |
0 | 99 { |
100 return; | |
101 } | |
102 | |
99
46ec13a1177c
use of ordered-slices
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
0
diff
changeset
|
103 const Json::Value& instances = series["Slices"]; |
101 | 104 |
0 | 105 if (instances.type() != Json::arrayValue) |
106 { | |
107 return; | |
108 } | |
109 | |
110 Json::Value::ArrayIndex position = 0; | |
111 while (position < instances.size()) | |
112 { | |
101 | 113 if (instances[position] == instanceAndFrame) |
0 | 114 { |
115 break; | |
116 } | |
117 | |
118 position++; | |
119 } | |
120 | |
121 if (position == instances.size()) | |
122 { | |
123 return; | |
124 } | |
125 | |
126 for (Json::Value::ArrayIndex i = position; | |
127 i < instances.size() && i < position + PREFETCH_FORWARD; | |
128 i++) | |
129 { | |
130 std::string item = compression + instances[i].asString(); | |
131 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
132 } | |
133 | |
134 for (Json::Value::ArrayIndex i = position; | |
135 i >= 0 && i > position - PREFETCH_BACKWARD; ) | |
136 { | |
137 i--; | |
138 std::string item = compression + instances[i].asString(); | |
139 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
140 } | |
141 } | |
142 | |
143 | |
144 void ViewerPrefetchPolicy::Apply(std::list<CacheIndex>& toPrefetch, | |
145 CacheScheduler& cache, | |
146 const CacheIndex& accessed, | |
147 const std::string& content) | |
148 { | |
149 switch (accessed.GetBundle()) | |
150 { | |
151 case CacheBundle_SeriesInformation: | |
152 ApplySeries(toPrefetch, cache, accessed.GetItem(), content); | |
153 return; | |
154 | |
155 case CacheBundle_DecodedImage: | |
156 ApplyInstance(toPrefetch, cache, accessed.GetItem()); | |
157 return; | |
158 | |
159 default: | |
160 return; | |
161 } | |
162 } | |
163 } | |
164 |