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annotate Core/DicomParsing/MemoryBufferTranscoder.cpp @ 3905:061f3d031b5d transcoding

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 08 May 2020 08:27:18 +0200
parents c62f84c7eda9
children f0dd5ded8927
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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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 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "MemoryBufferTranscoder.h"
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36
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37 #include "../OrthancException.h"
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38 #include "FromDcmtkBridge.h"
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39
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40 namespace Orthanc
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41 {
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42 MemoryBufferTranscoder::MemoryBufferTranscoder()
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43 {
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44 #if ORTHANC_ENABLE_DCMTK_TRANSCODING == 1
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45 useDcmtk_ = true;
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46 #else
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47 useDcmtk_ = false;
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48 #endif
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49 }
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50
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51
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52 void MemoryBufferTranscoder::SetDcmtkUsed(bool used)
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53 {
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54 #if ORTHANC_ENABLE_DCMTK_TRANSCODING != 1
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55 if (useDcmtk)
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56 {
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57 throw OrthancException(ErrorCode_NotImplemented,
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58 "Orthanc was built without support for DMCTK transcoding");
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59 }
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60 #endif
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61
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62 useDcmtk_ = used;
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63 }
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64
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65
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66 bool MemoryBufferTranscoder::TranscodeToBuffer(std::string& target,
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67 bool& hasSopInstanceUidChanged,
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68 const void* buffer,
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69 size_t size,
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70 const std::set<DicomTransferSyntax>& allowedSyntaxes,
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71 bool allowNewSopInstanceUid)
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72 {
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73 #if ORTHANC_ENABLE_DCMTK_TRANSCODING == 1
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74 if (useDcmtk_)
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75 {
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76 if (dcmtk_.TranscodeToBuffer(target, hasSopInstanceUidChanged, buffer,
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77 size, allowedSyntaxes, allowNewSopInstanceUid))
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78 {
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79 return true;
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80 }
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81 }
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82 #endif
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83
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84 return Transcode(target, hasSopInstanceUidChanged, buffer, size,
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85 allowedSyntaxes, allowNewSopInstanceUid);
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86 }
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87
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88
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89 DcmFileFormat* MemoryBufferTranscoder::TranscodeToParsed(bool& hasSopInstanceUidChanged,
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90 const void* buffer,
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91 size_t size,
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92 const std::set<DicomTransferSyntax>& allowedSyntaxes,
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93 bool allowNewSopInstanceUid)
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94 {
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95 #if ORTHANC_ENABLE_DCMTK_TRANSCODING == 1
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96 if (useDcmtk_)
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97 {
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98 std::unique_ptr<DcmFileFormat> transcoded(
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99 dcmtk_.TranscodeToParsed(hasSopInstanceUidChanged, buffer, size,
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100 allowedSyntaxes, allowNewSopInstanceUid));
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101 if (transcoded.get() != NULL)
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102 {
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103 return transcoded.release();
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104 }
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105 }
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106 #endif
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107
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108 std::string transcoded;
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109 if (Transcode(transcoded, hasSopInstanceUidChanged, buffer, size, allowedSyntaxes, allowNewSopInstanceUid))
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110 {
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111 return FromDcmtkBridge::LoadFromMemoryBuffer(
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112 transcoded.empty() ? NULL : transcoded.c_str(), transcoded.size());
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113 }
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114 else
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115 {
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116 return NULL;
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117 }
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118 }
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119
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120
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121 bool MemoryBufferTranscoder::HasInplaceTranscode(
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122 DicomTransferSyntax inputSyntax,
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123 const std::set<DicomTransferSyntax>& outputSyntaxes) const
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124 {
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125 /**
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126 * Inplace transcoding is only possible if DCMTK is enabled, and
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127 * if DCMTK supports all the requested transfer
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128 * syntaxes. Otherwise, one has to call the "buffer-to-buffer"
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129 * transcoder.
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130 **/
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131
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132 #if ORTHANC_ENABLE_DCMTK_TRANSCODING == 1
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133 if (useDcmtk_)
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134 {
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135 if (!DcmtkTranscoder::IsSupported(inputSyntax))
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136 {
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137 return false;
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138 }
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139
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140 for (std::set<DicomTransferSyntax>::const_iterator
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141 it = outputSyntaxes.begin(); it != outputSyntaxes.end(); ++it)
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142 {
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143 if (!DcmtkTranscoder::IsSupported(*it))
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144 {
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145 return false;
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146 }
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147 }
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148
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149 return true;
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150 }
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151 else
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152 #endif
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153 {
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154 return false;
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155 }
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156 }
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157
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158
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159 bool MemoryBufferTranscoder::InplaceTranscode(bool& hasSopInstanceUidChanged,
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160 DcmFileFormat& dicom,
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161 const std::set<DicomTransferSyntax>& allowedSyntaxes,
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162 bool allowNewSopInstanceUid)
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163 {
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164 #if ORTHANC_ENABLE_DCMTK_TRANSCODING == 1
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165 DicomTransferSyntax inputSyntax;
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166 if (useDcmtk_ &&
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167 FromDcmtkBridge::LookupOrthancTransferSyntax(inputSyntax, dicom) &&
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168 HasInplaceTranscode(inputSyntax, allowedSyntaxes))
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169 {
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170 return dcmtk_.InplaceTranscode(hasSopInstanceUidChanged, dicom, allowedSyntaxes, allowNewSopInstanceUid);
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171 }
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172 else
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173 #endif
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174 {
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175 // "HasInplaceTranscode()" should have been called
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176 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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177 }
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178 }
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179 }