Mercurial > hg > orthanc-webviewer
annotate Plugin/ViewerPrefetchPolicy.cpp @ 122:3809121c3290
2016
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 04 Jan 2016 13:30:43 +0100 |
| parents | 2932473a9b19 |
| children | 5dc54316d68b |
| 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 |
| 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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Sebastien Jodogne <s.jodogne@gmail.com>
parents:
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changeset
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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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use of ordered-slices
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
0
diff
changeset
|
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:
0
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 |