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annotate Plugins/Samples/GdcmDecoder/Plugin.cpp @ 3915:7e33516965f8 transcoding

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merging sample GDCM decoder and Orthanc Web viewer
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 11 May 2020 15:13:16 +0200
parents 6110a4995ace
children b99acc213937
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "../../../Core/Compatibility.h"
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23 #include "../../../Core/DicomFormat/DicomMap.h"
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24 #include "../../../Core/Toolbox.h"
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25 #include "GdcmDecoderCache.h"
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26
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27 static OrthancPlugins::GdcmDecoderCache cache_;
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28 static bool restrictTransferSyntaxes_ = false;
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29 static std::set<std::string> enabledTransferSyntaxes_;
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30
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31
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32 static bool ExtractTransferSyntax(std::string& transferSyntax,
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33 const void* dicom,
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34 const uint32_t size)
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35 {
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36 Orthanc::DicomMap header;
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37 if (!Orthanc::DicomMap::ParseDicomMetaInformation(header, reinterpret_cast<const char*>(dicom), size))
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38 {
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39 return false;
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40 }
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41
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42 const Orthanc::DicomValue* tag = header.TestAndGetValue(0x0002, 0x0010);
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43 if (tag == NULL ||
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44 tag->IsNull() ||
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45 tag->IsBinary())
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46 {
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47 return false;
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48 }
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49 else
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50 {
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51 // Stripping spaces should not be required, as this is a UI value
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52 // representation whose stripping is supported by the Orthanc
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53 // core, but let's be careful...
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54 transferSyntax = Orthanc::Toolbox::StripSpaces(tag->GetContent());
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55 return true;
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56 }
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57 }
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58
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59
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60 static bool IsTransferSyntaxEnabled(const void* dicom,
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61 const uint32_t size)
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62 {
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63 std::string formattedSize;
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64
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65 {
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66 char tmp[16];
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67 sprintf(tmp, "%0.1fMB", static_cast<float>(size) / (1024.0f * 1024.0f));
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68 formattedSize.assign(tmp);
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69 }
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70
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71 if (!restrictTransferSyntaxes_)
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72 {
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73 LOG(INFO) << "Decoding one DICOM instance of " << formattedSize << " using GDCM";
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74 return true;
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75 }
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76
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77 std::string transferSyntax;
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78 if (!ExtractTransferSyntax(transferSyntax, dicom, size))
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79 {
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80 LOG(INFO) << "Cannot extract the transfer syntax of this instance of "
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81 << formattedSize << ", will use GDCM to decode it";
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82 return true;
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83 }
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84 else if (enabledTransferSyntaxes_.find(transferSyntax) != enabledTransferSyntaxes_.end())
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85 {
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86 // Decoding for this transfer syntax is enabled
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87 LOG(INFO) << "Using GDCM to decode this instance of " << formattedSize
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88 << " with transfer syntax " << transferSyntax;
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89 return true;
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90 }
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91 else
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92 {
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93 LOG(INFO) << "Won't use GDCM to decode this instance of " << formattedSize
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94 << ", as its transfer syntax " << transferSyntax << " is disabled";
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95 return false;
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96 }
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97 }
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98
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99
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100 static OrthancPluginErrorCode DecodeImageCallback(OrthancPluginImage** target,
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101 const void* dicom,
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102 const uint32_t size,
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103 uint32_t frameIndex)
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104 {
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105 try
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106 {
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107 if (!IsTransferSyntaxEnabled(dicom, size))
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108 {
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109 *target = NULL;
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110 return OrthancPluginErrorCode_Success;
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111 }
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112
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113 std::unique_ptr<OrthancPlugins::OrthancImage> image;
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114
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115 #if 0
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116 // Do not use the cache
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117 OrthancPlugins::GdcmImageDecoder decoder(dicom, size);
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118 image.reset(new OrthancPlugins::OrthancImage(decoder.Decode(frameIndex)));
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119 #else
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120 image.reset(cache_.Decode(dicom, size, frameIndex));
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121 #endif
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122
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123 *target = image->Release();
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124
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125 return OrthancPluginErrorCode_Success;
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126 }
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127 catch (Orthanc::OrthancException& e)
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128 {
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129 *target = NULL;
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130
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131 LOG(WARNING) << "Cannot decode image using GDCM: " << e.What();
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132 return OrthancPluginErrorCode_Plugin;
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133 }
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134 catch (std::runtime_error& e)
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135 {
b1a6f49b21dd GDCM decoder sample
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136 *target = NULL;
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137
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138 LOG(WARNING) << "Cannot decode image using GDCM: " << e.what();
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139 return OrthancPluginErrorCode_Plugin;
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140 }
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141 catch (...)
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142 {
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143 *target = NULL;
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144
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145 LOG(WARNING) << "Native exception while decoding image using GDCM";
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146 return OrthancPluginErrorCode_Plugin;
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147 }
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148 }
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149
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150
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151
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152 /**
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153 * We force the redefinition of the "ORTHANC_PLUGINS_API" macro, that
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154 * was left empty with gcc until Orthanc SDK 1.5.7 (no "default"
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155 * visibility). This causes the version script, if run from "Holy
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156 * Build Box", to make private the 4 global functions of the plugin.
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157 **/
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158
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159 #undef ORTHANC_PLUGINS_API
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160
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161 #ifdef WIN32
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162 # define ORTHANC_PLUGINS_API __declspec(dllexport)
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163 #elif __GNUC__ >= 4
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164 # define ORTHANC_PLUGINS_API __attribute__ ((visibility ("default")))
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165 #else
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166 # define ORTHANC_PLUGINS_API
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167 #endif
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168
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169
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170 extern "C"
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171 {
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172 ORTHANC_PLUGINS_API int32_t OrthancPluginInitialize(OrthancPluginContext* context)
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173 {
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174 static const char* const KEY_GDCM = "Gdcm";
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175 static const char* const KEY_ENABLE_GDCM = "EnableGdcm";
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176 static const char* const KEY_RESTRICT_TRANSFER_SYNTAXES = "RestrictTransferSyntaxes";
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177
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178 OrthancPlugins::SetGlobalContext(context);
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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179 LOG(INFO) << "Initializing the advanced decoder of medical images using GDCM";
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180
b1a6f49b21dd GDCM decoder sample
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181
b1a6f49b21dd GDCM decoder sample
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182 /* Check the version of the Orthanc core */
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183 if (OrthancPluginCheckVersion(context) == 0)
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184 {
b1a6f49b21dd GDCM decoder sample
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185 char info[1024];
b1a6f49b21dd GDCM decoder sample
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186 sprintf(info, "Your version of Orthanc (%s) must be above %d.%d.%d to run this plugin",
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187 context->orthancVersion,
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188 ORTHANC_PLUGINS_MINIMAL_MAJOR_NUMBER,
b1a6f49b21dd GDCM decoder sample
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189 ORTHANC_PLUGINS_MINIMAL_MINOR_NUMBER,
b1a6f49b21dd GDCM decoder sample
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190 ORTHANC_PLUGINS_MINIMAL_REVISION_NUMBER);
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191 OrthancPluginLogError(context, info);
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192 return -1;
b1a6f49b21dd GDCM decoder sample
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193 }
b1a6f49b21dd GDCM decoder sample
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194
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195 OrthancPluginSetDescription(context, "Advanced decoder of medical images using GDCM.");
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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196
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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197 OrthancPlugins::OrthancConfiguration global;
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198
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199 bool enabled = true;
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200
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201 if (global.IsSection(KEY_GDCM))
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202 {
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203 OrthancPlugins::OrthancConfiguration config;
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204 global.GetSection(config, KEY_GDCM);
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205
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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206 enabled = config.GetBooleanValue(KEY_ENABLE_GDCM, true);
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207
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208 if (config.LookupSetOfStrings(enabledTransferSyntaxes_, KEY_RESTRICT_TRANSFER_SYNTAXES, false))
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209 {
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210 restrictTransferSyntaxes_ = true;
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211
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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212 for (std::set<std::string>::const_iterator it = enabledTransferSyntaxes_.begin();
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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213 it != enabledTransferSyntaxes_.end(); ++it)
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214 {
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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215 LOG(WARNING) << "Orthanc will use GDCM to decode transfer syntax: " << *it;
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216 }
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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217 }
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218 }
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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219
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220 if (enabled)
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221 {
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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222 OrthancPluginRegisterDecodeImageCallback(context, DecodeImageCallback);
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223 }
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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224 else
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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225 {
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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226 LOG(WARNING) << "The advanced decoder of medical images using GDCM is disabled";
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227 }
7e33516965f8 merging sample GDCM decoder and Orthanc Web viewer
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228
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229 return 0;
b1a6f49b21dd GDCM decoder sample
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230 }
b1a6f49b21dd GDCM decoder sample
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231
b1a6f49b21dd GDCM decoder sample
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232
b1a6f49b21dd GDCM decoder sample
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233 ORTHANC_PLUGINS_API void OrthancPluginFinalize()
b1a6f49b21dd GDCM decoder sample
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234 {
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235 LOG(INFO) << "Finalizing the advanced decoder of medical images using GDCM";
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236 }
b1a6f49b21dd GDCM decoder sample
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237
b1a6f49b21dd GDCM decoder sample
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238
b1a6f49b21dd GDCM decoder sample
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239 ORTHANC_PLUGINS_API const char* OrthancPluginGetName()
b1a6f49b21dd GDCM decoder sample
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240 {
b1a6f49b21dd GDCM decoder sample
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241 return "gdcm-decoder";
b1a6f49b21dd GDCM decoder sample
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242 }
b1a6f49b21dd GDCM decoder sample
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243
b1a6f49b21dd GDCM decoder sample
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diff changeset
244
b1a6f49b21dd GDCM decoder sample
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diff changeset
245 ORTHANC_PLUGINS_API const char* OrthancPluginGetVersion()
b1a6f49b21dd GDCM decoder sample
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246 {
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diff changeset
247 return PLUGIN_VERSION;
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248 }
b1a6f49b21dd GDCM decoder sample
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249 }