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annotate Core/DicomParsing/MemoryBufferTranscoder.cpp @ 3944:aae045f802f4 transcoding

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preparing simplified interface for IDicomTranscoder
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 19 May 2020 10:17:06 +0200
parents b99acc213937
children 0b3256c3ee14
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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 #if !defined(NDEBUG) // For debugging
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41 # include "ParsedDicomFile.h"
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42 #endif
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43
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44 namespace Orthanc
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45 {
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46 static void CheckTargetSyntax(const std::string& transcoded,
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47 const std::set<DicomTransferSyntax>& allowedSyntaxes)
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48 {
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49 #if !defined(NDEBUG)
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50 // Debug mode
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51 ParsedDicomFile parsed(transcoded);
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52
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53 std::string s;
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54 DicomTransferSyntax a, b;
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55 if (!parsed.LookupTransferSyntax(s) ||
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56 !FromDcmtkBridge::LookupOrthancTransferSyntax(a, parsed.GetDcmtkObject()) ||
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57 !LookupTransferSyntax(b, s) ||
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58 a != b ||
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59 allowedSyntaxes.find(a) == allowedSyntaxes.end())
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60 {
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61 throw OrthancException(
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62 ErrorCode_Plugin,
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63 "DEBUG - The transcoding plugin has not written to one of the allowed transfer syntaxes");
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64 }
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65 #endif
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66 }
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67
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68
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69 bool MemoryBufferTranscoder::TranscodeParsedToBuffer(
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70 std::string& target /* out */,
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71 bool& hasSopInstanceUidChanged /* out */,
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72 DcmFileFormat& dicom /* in, possibly modified */,
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73 DicomTransferSyntax targetSyntax,
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74 bool allowNewSopInstanceUid)
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75 {
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76 if (dicom.getDataset() == NULL)
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77 {
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78 throw OrthancException(ErrorCode_InternalError);
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79 }
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80
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81 std::string source;
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82 FromDcmtkBridge::SaveToMemoryBuffer(source, *dicom.getDataset());
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83
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84 const void* data = source.empty() ? NULL : source.c_str();
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85
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86 std::set<DicomTransferSyntax> allowedSyntaxes;
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87 allowedSyntaxes.insert(targetSyntax);
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88
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89 if (TranscodeBuffer(target, hasSopInstanceUidChanged,
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90 data, source.size(), allowedSyntaxes, allowNewSopInstanceUid))
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91 {
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92 CheckTargetSyntax(target, allowedSyntaxes);
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93 return true;
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94 }
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95 else
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96 {
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97 return false;
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98 }
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99 }
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100
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101
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102 IDicomTranscoder::TranscodedDicom* MemoryBufferTranscoder::TranscodeToParsed(
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103 DcmFileFormat& dicom /* in, possibly modified */,
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104 const void* buffer /* in, same DICOM file as "dicom" */,
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105 size_t size,
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106 const std::set<DicomTransferSyntax>& allowedSyntaxes,
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107 bool allowNewSopInstanceUid)
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108 {
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109 bool hasSopInstanceUidChanged;
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110
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111 std::string target;
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112 if (TranscodeBuffer(target, hasSopInstanceUidChanged,
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113 buffer, size, allowedSyntaxes, allowNewSopInstanceUid))
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114 {
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115 CheckTargetSyntax(target, allowedSyntaxes);
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116
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117 const void* data = target.empty() ? NULL : target.c_str();
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118 return IDicomTranscoder::TranscodedDicom::CreateFromInternal(
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119 FromDcmtkBridge::LoadFromMemoryBuffer(data, target.size()), hasSopInstanceUidChanged);
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120 }
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121 else
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122 {
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123 return NULL;
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124 }
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125 }
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126
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127
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128 bool MemoryBufferTranscoder::Transcode(DicomImage& target,
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129 bool& hasSopInstanceUidChanged /* out */,
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130 DicomImage& source,
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131 const std::set<DicomTransferSyntax>& allowedSyntaxes,
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132 bool allowNewSopInstanceUid)
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133 {
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134 target.Clear();
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135
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136 std::string buffer;
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137 if (TranscodeBuffer(buffer, hasSopInstanceUidChanged, source.GetBufferData(),
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138 source.GetBufferSize(), allowedSyntaxes, allowNewSopInstanceUid))
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139 {
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140 CheckTargetSyntax(buffer, allowedSyntaxes); // For debug only
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141 target.AcquireBuffer(buffer);
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142 return true;
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143 }
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144 else
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145 {
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146 return false;
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147 }
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148 }
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149 }