Mercurial > hg > orthanc-webviewer
annotate Plugin/ViewerPrefetchPolicy.cpp @ 151:ee5ff71f133b
sync
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 10 Nov 2016 09:58:13 +0100 |
parents | 3809121c3290 |
children | 5dc54316d68b |
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 |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU Affero General Public License | |
8 * as published by the Free Software Foundation, either version 3 of | |
9 * the License, or (at your option) any later version. | |
10 * | |
11 * This program is distributed in the hope that it will be useful, but | |
12 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 * Affero General Public License for more details. | |
15 * | |
16 * You should have received a copy of the GNU Affero General Public License | |
17 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 **/ | |
19 | |
20 | |
21 #include "ViewerPrefetchPolicy.h" | |
22 | |
23 #include "ViewerToolbox.h" | |
24 #include "Cache/CacheScheduler.h" | |
25 | |
26 #include <json/value.h> | |
27 #include <json/reader.h> | |
28 | |
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; | |
43 Json::Reader reader; | |
44 if (!reader.parse(content, json) || | |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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changeset
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45 !json.isMember("Slices")) |
0 | 46 { |
47 return; | |
48 } | |
49 | |
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50 const Json::Value& instances = json["Slices"]; |
0 | 51 if (instances.type() != Json::arrayValue) |
52 { | |
53 return; | |
54 } | |
55 | |
56 for (Json::Value::ArrayIndex i = 0; | |
57 i < instances.size() && i < PREFETCH_FORWARD; | |
58 i++) | |
59 { | |
60 std::string item = "jpeg95-" + instances[i].asString(); | |
61 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
62 } | |
63 } | |
64 | |
65 | |
66 void ViewerPrefetchPolicy::ApplyInstance(std::list<CacheIndex>& toPrefetch, | |
67 CacheScheduler& cache, | |
68 const std::string& path) | |
69 { | |
70 size_t separator = path.find('-'); | |
71 if (separator == std::string::npos) | |
72 { | |
73 return; | |
74 } | |
75 | |
76 std::string compression = path.substr(0, separator + 1); | |
101 | 77 std::string instanceAndFrame = path.substr(separator + 1); |
0 | 78 |
101 | 79 std::string instanceId = instanceAndFrame.substr(0, instanceAndFrame.find('_')); |
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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
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80 |
0 | 81 Json::Value instance; |
82 if (!GetJsonFromOrthanc(instance, context_, "/instances/" + instanceId) || | |
83 !instance.isMember("ParentSeries")) | |
84 { | |
85 return; | |
86 } | |
87 | |
88 std::string tmp; | |
89 if (!cache.Access(tmp, CacheBundle_SeriesInformation, instance["ParentSeries"].asString())) | |
90 { | |
91 return; | |
92 } | |
93 | |
94 Json::Value series; | |
95 Json::Reader reader; | |
96 if (!reader.parse(tmp, series) || | |
99
46ec13a1177c
use of ordered-slices
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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diff
changeset
|
97 !series.isMember("Slices")) |
0 | 98 { |
99 return; | |
100 } | |
101 | |
99
46ec13a1177c
use of ordered-slices
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
0
diff
changeset
|
102 const Json::Value& instances = series["Slices"]; |
101 | 103 |
0 | 104 if (instances.type() != Json::arrayValue) |
105 { | |
106 return; | |
107 } | |
108 | |
109 Json::Value::ArrayIndex position = 0; | |
110 while (position < instances.size()) | |
111 { | |
101 | 112 if (instances[position] == instanceAndFrame) |
0 | 113 { |
114 break; | |
115 } | |
116 | |
117 position++; | |
118 } | |
119 | |
120 if (position == instances.size()) | |
121 { | |
122 return; | |
123 } | |
124 | |
125 for (Json::Value::ArrayIndex i = position; | |
126 i < instances.size() && i < position + PREFETCH_FORWARD; | |
127 i++) | |
128 { | |
129 std::string item = compression + instances[i].asString(); | |
130 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
131 } | |
132 | |
133 for (Json::Value::ArrayIndex i = position; | |
134 i >= 0 && i > position - PREFETCH_BACKWARD; ) | |
135 { | |
136 i--; | |
137 std::string item = compression + instances[i].asString(); | |
138 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item)); | |
139 } | |
140 } | |
141 | |
142 | |
143 void ViewerPrefetchPolicy::Apply(std::list<CacheIndex>& toPrefetch, | |
144 CacheScheduler& cache, | |
145 const CacheIndex& accessed, | |
146 const std::string& content) | |
147 { | |
148 switch (accessed.GetBundle()) | |
149 { | |
150 case CacheBundle_SeriesInformation: | |
151 ApplySeries(toPrefetch, cache, accessed.GetItem(), content); | |
152 return; | |
153 | |
154 case CacheBundle_DecodedImage: | |
155 ApplyInstance(toPrefetch, cache, accessed.GetItem()); | |
156 return; | |
157 | |
158 default: | |
159 return; | |
160 } | |
161 } | |
162 } | |
163 |