Mercurial > hg > orthanc
annotate OrthancServer/Internals/DicomFrameIndex.cpp @ 2158:728403a6ec1f
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 18 Nov 2016 17:40:41 +0100 |
parents | bb199bccdc45 |
children | a3a65de1840f |
rev | line source |
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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 * |
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6 * This program is free software: you can redistribute it and/or |
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7 * modify it under the terms of the GNU General Public License as |
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8 * published by the Free Software Foundation, either version 3 of the |
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9 * License, or (at your option) any later version. |
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10 * |
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11 * In addition, as a special exception, the copyright holders of this |
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12 * program give permission to link the code of its release with the |
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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14 * that use the same license as the "OpenSSL" library), and distribute |
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15 * the linked executables. You must obey the GNU General Public License |
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16 * in all respects for all of the code used other than "OpenSSL". If you |
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17 * modify file(s) with this exception, you may extend this exception to |
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18 * your version of the file(s), but you are not obligated to do so. If |
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19 * you do not wish to do so, delete this exception statement from your |
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20 * version. If you delete this exception statement from all source files |
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21 * in the program, then also delete it here. |
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22 * |
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23 * This program is distributed in the hope that it will be useful, but |
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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26 * General Public License for more details. |
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27 * |
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28 * You should have received a copy of the GNU General Public License |
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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30 **/ |
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31 |
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32 |
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33 #include "../PrecompiledHeadersServer.h" |
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34 #include "DicomFrameIndex.h" |
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35 |
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36 #include "../../Core/OrthancException.h" |
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37 #include "../../Core/DicomFormat/DicomImageInformation.h" |
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38 #include "../FromDcmtkBridge.h" |
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39 #include "../OrthancInitialization.h" |
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40 #include "../../Core/Endianness.h" |
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41 #include "DicomImageDecoder.h" |
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42 |
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43 #include <boost/lexical_cast.hpp> |
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44 |
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45 #include <dcmtk/dcmdata/dcdeftag.h> |
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46 #include <dcmtk/dcmdata/dcpxitem.h> |
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47 #include <dcmtk/dcmdata/dcpixseq.h> |
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48 |
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49 namespace Orthanc |
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50 { |
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51 class DicomFrameIndex::FragmentIndex : public DicomFrameIndex::IIndex |
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52 { |
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53 private: |
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54 DcmPixelSequence* pixelSequence_; |
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55 std::vector<DcmPixelItem*> startFragment_; |
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56 std::vector<unsigned int> countFragments_; |
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57 std::vector<unsigned int> frameSize_; |
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58 |
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59 void GetOffsetTable(std::vector<uint32_t>& table) |
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60 { |
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61 DcmPixelItem* item = NULL; |
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62 if (!pixelSequence_->getItem(item, 0).good() || |
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63 item == NULL) |
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64 { |
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65 throw OrthancException(ErrorCode_BadFileFormat); |
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66 } |
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67 |
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68 uint32_t length = item->getLength(); |
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69 if (length == 0) |
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70 { |
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71 table.clear(); |
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72 return; |
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73 } |
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74 |
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75 if (length % 4 != 0) |
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76 { |
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77 // Error: Each fragment is index with 4 bytes (uint32_t) |
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78 throw OrthancException(ErrorCode_BadFileFormat); |
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79 } |
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80 |
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81 uint8_t* content = NULL; |
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82 if (!item->getUint8Array(content).good() || |
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83 content == NULL) |
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84 { |
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85 throw OrthancException(ErrorCode_InternalError); |
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86 } |
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87 |
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88 table.resize(length / 4); |
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89 |
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90 // The offset table is always in little endian in the DICOM |
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91 // file. Swap it to host endianness if needed. |
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92 const uint32_t* offset = reinterpret_cast<const uint32_t*>(content); |
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93 for (size_t i = 0; i < table.size(); i++, offset++) |
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94 { |
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95 table[i] = le32toh(*offset); |
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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 public: |
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101 FragmentIndex(DcmPixelSequence* pixelSequence, |
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102 unsigned int countFrames) : |
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103 pixelSequence_(pixelSequence) |
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104 { |
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105 assert(pixelSequence != NULL); |
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106 |
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107 startFragment_.resize(countFrames); |
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108 countFragments_.resize(countFrames); |
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109 frameSize_.resize(countFrames); |
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110 |
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111 // The first fragment corresponds to the offset table |
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112 unsigned int countFragments = static_cast<unsigned int>(pixelSequence_->card()); |
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113 if (countFragments < countFrames + 1) |
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114 { |
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115 throw OrthancException(ErrorCode_BadFileFormat); |
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116 } |
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117 |
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118 if (countFragments == countFrames + 1) |
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119 { |
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120 // Simple case: There is one fragment per frame. |
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121 |
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122 DcmObject* fragment = pixelSequence_->nextInContainer(NULL); // Skip the offset table |
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123 if (fragment == NULL) |
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124 { |
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125 throw OrthancException(ErrorCode_InternalError); |
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126 } |
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127 |
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128 for (unsigned int i = 0; i < countFrames; i++) |
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129 { |
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130 fragment = pixelSequence_->nextInContainer(fragment); |
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131 startFragment_[i] = dynamic_cast<DcmPixelItem*>(fragment); |
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132 frameSize_[i] = fragment->getLength(); |
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133 countFragments_[i] = 1; |
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134 } |
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135 |
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136 return; |
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137 } |
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138 |
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139 // Parse the offset table |
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140 std::vector<uint32_t> offsetOfFrame; |
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141 GetOffsetTable(offsetOfFrame); |
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142 |
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143 if (offsetOfFrame.size() != countFrames || |
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144 offsetOfFrame[0] != 0) |
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145 { |
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146 throw OrthancException(ErrorCode_BadFileFormat); |
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147 } |
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148 |
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149 |
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150 // Loop over the fragments (ignoring the offset table). This is |
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151 // an alternative, faster implementation to DCMTK's |
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152 // "DcmCodec::determineStartFragment()". |
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153 DcmObject* fragment = pixelSequence_->nextInContainer(NULL); |
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154 if (fragment == NULL) |
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155 { |
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156 throw OrthancException(ErrorCode_InternalError); |
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157 } |
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158 |
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159 fragment = pixelSequence_->nextInContainer(fragment); // Skip the offset table |
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160 if (fragment == NULL) |
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161 { |
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162 throw OrthancException(ErrorCode_InternalError); |
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163 } |
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164 |
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165 uint32_t offset = 0; |
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166 unsigned int currentFrame = 0; |
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167 startFragment_[0] = dynamic_cast<DcmPixelItem*>(fragment); |
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168 |
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169 unsigned int currentFragment = 1; |
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170 while (fragment != NULL) |
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171 { |
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172 if (currentFrame + 1 < countFrames && |
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173 offset == offsetOfFrame[currentFrame + 1]) |
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174 { |
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175 currentFrame += 1; |
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176 startFragment_[currentFrame] = dynamic_cast<DcmPixelItem*>(fragment); |
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177 } |
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178 |
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179 frameSize_[currentFrame] += fragment->getLength(); |
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180 countFragments_[currentFrame]++; |
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181 |
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182 // 8 bytes = overhead for the item tag and length field |
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183 offset += fragment->getLength() + 8; |
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184 |
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185 currentFragment++; |
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186 fragment = pixelSequence_->nextInContainer(fragment); |
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187 } |
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188 |
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189 if (currentFragment != countFragments || |
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190 currentFrame + 1 != countFrames || |
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191 fragment != NULL) |
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192 { |
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193 throw OrthancException(ErrorCode_BadFileFormat); |
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194 } |
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195 |
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196 assert(startFragment_.size() == countFragments_.size() && |
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197 startFragment_.size() == frameSize_.size()); |
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198 } |
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199 |
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200 |
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201 virtual void GetRawFrame(std::string& frame, |
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202 unsigned int index) const |
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203 { |
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204 if (index >= startFragment_.size()) |
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205 { |
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206 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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207 } |
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208 |
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209 frame.resize(frameSize_[index]); |
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210 if (frame.size() == 0) |
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211 { |
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212 return; |
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213 } |
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214 |
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215 uint8_t* target = reinterpret_cast<uint8_t*>(&frame[0]); |
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216 |
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217 size_t offset = 0; |
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218 DcmPixelItem* fragment = startFragment_[index]; |
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219 for (unsigned int i = 0; i < countFragments_[index]; i++) |
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220 { |
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221 uint8_t* content = NULL; |
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222 if (!fragment->getUint8Array(content).good() || |
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223 content == NULL) |
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224 { |
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225 throw OrthancException(ErrorCode_InternalError); |
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226 } |
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227 |
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228 assert(offset + fragment->getLength() <= frame.size()); |
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229 |
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230 memcpy(target + offset, content, fragment->getLength()); |
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231 offset += fragment->getLength(); |
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232 |
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233 fragment = dynamic_cast<DcmPixelItem*>(pixelSequence_->nextInContainer(fragment)); |
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234 } |
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235 } |
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236 }; |
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237 |
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238 |
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239 |
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240 class DicomFrameIndex::UncompressedIndex : public DicomFrameIndex::IIndex |
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241 { |
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242 private: |
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243 uint8_t* pixelData_; |
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244 size_t frameSize_; |
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245 |
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246 public: |
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247 UncompressedIndex(DcmDataset& dataset, |
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248 unsigned int countFrames, |
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249 size_t frameSize) : |
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250 pixelData_(NULL), |
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251 frameSize_(frameSize) |
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252 { |
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253 size_t size = 0; |
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254 |
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255 DcmElement* e; |
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256 if (dataset.findAndGetElement(DCM_PixelData, e).good() && |
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257 e != NULL) |
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258 { |
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259 size = e->getLength(); |
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260 |
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261 if (size > 0) |
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262 { |
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263 pixelData_ = NULL; |
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264 if (!e->getUint8Array(pixelData_).good() || |
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265 pixelData_ == NULL) |
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266 { |
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267 throw OrthancException(ErrorCode_BadFileFormat); |
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268 } |
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269 } |
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270 } |
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271 |
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272 if (size < frameSize_ * countFrames) |
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273 { |
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274 throw OrthancException(ErrorCode_BadFileFormat); |
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275 } |
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276 } |
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277 |
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278 virtual void GetRawFrame(std::string& frame, |
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279 unsigned int index) const |
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280 { |
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281 frame.resize(frameSize_); |
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282 if (frameSize_ > 0) |
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283 { |
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284 memcpy(&frame[0], pixelData_ + index * frameSize_, frameSize_); |
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285 } |
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286 } |
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287 }; |
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288 |
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289 |
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290 class DicomFrameIndex::PsmctRle1Index : public DicomFrameIndex::IIndex |
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291 { |
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292 private: |
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293 std::string pixelData_; |
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294 size_t frameSize_; |
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295 |
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296 public: |
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297 PsmctRle1Index(DcmDataset& dataset, |
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298 unsigned int countFrames, |
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299 size_t frameSize) : |
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300 frameSize_(frameSize) |
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301 { |
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302 if (!DicomImageDecoder::DecodePsmctRle1(pixelData_, dataset) || |
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303 pixelData_.size() < frameSize * countFrames) |
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304 { |
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305 throw OrthancException(ErrorCode_BadFileFormat); |
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306 } |
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307 } |
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308 |
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309 virtual void GetRawFrame(std::string& frame, |
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310 unsigned int index) const |
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311 { |
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312 frame.resize(frameSize_); |
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313 if (frameSize_ > 0) |
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314 { |
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315 memcpy(&frame[0], reinterpret_cast<const uint8_t*>(&pixelData_[0]) + index * frameSize_, frameSize_); |
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316 } |
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317 } |
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318 }; |
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319 |
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320 |
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321 |
1956 | 322 bool DicomFrameIndex::IsVideo(DcmFileFormat& dicom) |
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323 { |
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324 // Retrieve the transfer syntax from the DICOM header |
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325 const char* value = NULL; |
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326 if (!dicom.getMetaInfo()->findAndGetString(DCM_TransferSyntaxUID, value).good() || |
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327 value == NULL) |
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328 { |
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329 return false; |
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330 } |
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331 |
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332 const std::string transferSyntax(value); |
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333 |
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334 // Video standards supported in DICOM 2016a |
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335 // http://dicom.nema.org/medical/dicom/2016a/output/html/part05.html |
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336 if (transferSyntax == "1.2.840.10008.1.2.4.100" || // MPEG2 MP@ML option of ISO/IEC MPEG2 |
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337 transferSyntax == "1.2.840.10008.1.2.4.101" || // MPEG2 MP@HL option of ISO/IEC MPEG2 |
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338 transferSyntax == "1.2.840.10008.1.2.4.102" || // MPEG-4 AVC/H.264 High Profile / Level 4.1 of ITU-T H.264 |
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339 transferSyntax == "1.2.840.10008.1.2.4.103" || // MPEG-4 AVC/H.264 BD-compat High Profile / Level 4.1 of ITU-T H.264 |
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340 transferSyntax == "1.2.840.10008.1.2.4.104" || // MPEG-4 AVC/H.264 High Profile / Level 4.2 of ITU-T H.264 |
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341 transferSyntax == "1.2.840.10008.1.2.4.105" || // MPEG-4 AVC/H.264 High Profile / Level 4.2 of ITU-T H.264 |
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342 transferSyntax == "1.2.840.10008.1.2.4.106") // MPEG-4 AVC/H.264 Stereo High Profile / Level 4.2 of the ITU-T H.264 |
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343 { |
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344 return true; |
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345 } |
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346 |
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347 return false; |
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348 } |
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349 |
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350 |
1956 | 351 unsigned int DicomFrameIndex::GetFramesCount(DcmFileFormat& dicom) |
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352 { |
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353 // Assume 1 frame for video transfer syntaxes |
1956 | 354 if (IsVideo(dicom)) |
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355 { |
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356 return 1; |
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357 } |
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358 |
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359 const char* tmp = NULL; |
1956 | 360 if (!dicom.getDataset()->findAndGetString(DCM_NumberOfFrames, tmp).good() || |
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361 tmp == NULL) |
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362 { |
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363 return 1; |
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364 } |
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365 |
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366 int count = -1; |
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367 try |
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368 { |
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369 count = boost::lexical_cast<int>(tmp); |
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370 } |
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371 catch (boost::bad_lexical_cast&) |
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372 { |
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373 } |
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374 |
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375 if (count < 0) |
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376 { |
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377 throw OrthancException(ErrorCode_BadFileFormat); |
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378 } |
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379 else |
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380 { |
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381 return count; |
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382 } |
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383 } |
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384 |
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385 |
1956 | 386 DicomFrameIndex::DicomFrameIndex(DcmFileFormat& dicom) |
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387 { |
1956 | 388 countFrames_ = GetFramesCount(dicom); |
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389 if (countFrames_ == 0) |
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390 { |
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391 // The image has no frame. No index is to be built. |
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392 return; |
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393 } |
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394 |
1956 | 395 DcmDataset& dataset = *dicom.getDataset(); |
396 | |
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397 // Test whether this image is composed of a sequence of fragments |
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398 DcmPixelSequence* pixelSequence = FromDcmtkBridge::GetPixelSequence(dataset); |
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399 if (pixelSequence != NULL) |
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400 { |
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401 index_.reset(new FragmentIndex(pixelSequence, countFrames_)); |
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402 return; |
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403 } |
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404 |
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405 // Extract information about the image structure |
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406 DicomMap tags; |
2131 | 407 Configuration::ExtractDicomSummary(tags, dataset); |
1924
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408 |
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409 DicomImageInformation information(tags); |
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410 |
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411 // Access to the raw pixel data |
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412 if (DicomImageDecoder::IsPsmctRle1(dataset)) |
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413 { |
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414 index_.reset(new PsmctRle1Index(dataset, countFrames_, information.GetFrameSize())); |
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415 } |
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416 else |
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417 { |
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418 index_.reset(new UncompressedIndex(dataset, countFrames_, information.GetFrameSize())); |
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419 } |
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420 } |
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421 |
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422 |
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423 void DicomFrameIndex::GetRawFrame(std::string& frame, |
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424 unsigned int index) const |
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425 { |
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426 if (index >= countFrames_) |
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427 { |
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428 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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429 } |
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430 else if (index_.get() != NULL) |
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431 { |
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432 return index_->GetRawFrame(frame, index); |
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433 } |
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434 else |
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435 { |
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436 frame.clear(); |
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437 } |
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438 } |
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439 } |