Mercurial > hg > orthanc
annotate Core/Images/PamReader.cpp @ 3848:44bfcfdf42e8 transcoding
integration mainline->transcoding
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 20 Apr 2020 14:04:14 +0200 |
parents | 95083d2f6819 |
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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 "PamReader.h" |
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36 |
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38 #include "../OrthancException.h" |
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39 #include "../Toolbox.h" |
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41 #if ORTHANC_SANDBOXED == 0 |
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42 # include "../SystemToolbox.h" |
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43 #endif |
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44 |
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46 #include <boost/algorithm/string/find.hpp> |
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47 #include <boost/lexical_cast.hpp> |
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48 |
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49 |
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50 namespace Orthanc |
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51 { |
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52 static void GetPixelFormat(PixelFormat& format, |
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53 unsigned int& bytesPerChannel, |
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54 const unsigned int& maxValue, |
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55 const unsigned int& channelCount, |
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56 const std::string& tupleType) |
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57 { |
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58 if (tupleType == "GRAYSCALE" && |
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59 channelCount == 1) |
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60 { |
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61 switch (maxValue) |
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62 { |
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63 case 255: |
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64 format = PixelFormat_Grayscale8; |
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65 bytesPerChannel = 1; |
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66 return; |
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67 |
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68 case 65535: |
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69 format = PixelFormat_Grayscale16; |
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70 bytesPerChannel = 2; |
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71 return; |
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72 |
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73 default: |
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74 throw OrthancException(ErrorCode_NotImplemented); |
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75 } |
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76 } |
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77 else if (tupleType == "RGB" && |
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78 channelCount == 3) |
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79 { |
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80 switch (maxValue) |
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81 { |
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82 case 255: |
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83 format = PixelFormat_RGB24; |
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84 bytesPerChannel = 1; |
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85 return; |
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86 |
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87 case 65535: |
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88 format = PixelFormat_RGB48; |
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89 bytesPerChannel = 2; |
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90 return; |
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91 |
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92 default: |
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93 throw OrthancException(ErrorCode_NotImplemented); |
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94 } |
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95 } |
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96 else |
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97 { |
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98 throw OrthancException(ErrorCode_NotImplemented); |
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99 } |
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100 } |
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101 |
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102 |
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103 typedef std::map<std::string, std::string> Parameters; |
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104 |
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105 |
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106 static std::string LookupStringParameter(const Parameters& parameters, |
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107 const std::string& key) |
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108 { |
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109 Parameters::const_iterator found = parameters.find(key); |
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110 |
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111 if (found == parameters.end()) |
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112 { |
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113 throw OrthancException(ErrorCode_BadFileFormat); |
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114 } |
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115 else |
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116 { |
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117 return found->second; |
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118 } |
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119 } |
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120 |
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121 |
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122 static unsigned int LookupIntegerParameter(const Parameters& parameters, |
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123 const std::string& key) |
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124 { |
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125 try |
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126 { |
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127 int value = boost::lexical_cast<int>(LookupStringParameter(parameters, key)); |
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128 |
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129 if (value < 0) |
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130 { |
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131 throw OrthancException(ErrorCode_BadFileFormat); |
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132 } |
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133 else |
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134 { |
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135 return static_cast<unsigned int>(value); |
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136 } |
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137 } |
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138 catch (boost::bad_lexical_cast&) |
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139 { |
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140 throw OrthancException(ErrorCode_BadFileFormat); |
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141 } |
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142 } |
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143 |
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144 |
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145 void PamReader::ParseContent() |
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146 { |
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147 static const std::string headerDelimiter = "ENDHDR\n"; |
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148 |
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149 boost::iterator_range<std::string::const_iterator> headerRange = |
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150 boost::algorithm::find_first(content_, headerDelimiter); |
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151 |
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152 if (!headerRange) |
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153 { |
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154 throw OrthancException(ErrorCode_BadFileFormat); |
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155 } |
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156 |
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157 std::string header(static_cast<const std::string&>(content_).begin(), headerRange.begin()); |
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158 |
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159 std::vector<std::string> lines; |
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160 Toolbox::TokenizeString(lines, header, '\n'); |
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161 |
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162 if (lines.size() < 2 || |
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163 lines.front() != "P7" || |
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164 !lines.back().empty()) |
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165 { |
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166 throw OrthancException(ErrorCode_BadFileFormat); |
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167 } |
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168 |
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169 Parameters parameters; |
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170 |
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171 for (size_t i = 1; i + 1 < lines.size(); i++) |
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172 { |
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173 std::vector<std::string> tokens; |
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174 Toolbox::TokenizeString(tokens, lines[i], ' '); |
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175 |
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176 if (tokens.size() != 2) |
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177 { |
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178 throw OrthancException(ErrorCode_BadFileFormat); |
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179 } |
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180 else |
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181 { |
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182 parameters[tokens[0]] = tokens[1]; |
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183 } |
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184 } |
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185 |
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186 const unsigned int width = LookupIntegerParameter(parameters, "WIDTH"); |
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187 const unsigned int height = LookupIntegerParameter(parameters, "HEIGHT"); |
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188 const unsigned int channelCount = LookupIntegerParameter(parameters, "DEPTH"); |
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189 const unsigned int maxValue = LookupIntegerParameter(parameters, "MAXVAL"); |
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190 const std::string tupleType = LookupStringParameter(parameters, "TUPLTYPE"); |
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191 |
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192 unsigned int bytesPerChannel; |
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193 PixelFormat format; |
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194 GetPixelFormat(format, bytesPerChannel, maxValue, channelCount, tupleType.c_str()); |
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195 |
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196 unsigned int pitch = width * channelCount * bytesPerChannel; |
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197 |
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198 if (content_.size() != header.size() + headerDelimiter.size() + pitch * height) |
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199 { |
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200 throw OrthancException(ErrorCode_BadFileFormat); |
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201 } |
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202 |
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203 size_t offset = content_.size() - pitch * height; |
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204 |
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205 { |
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206 intptr_t bufferAddr = reinterpret_cast<intptr_t>(&content_[offset]); |
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207 if((bufferAddr % 8) == 0) |
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208 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr; |
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209 else |
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210 LOG(TRACE) << "PamReader::ParseContent() image address = " << bufferAddr << " (not a multiple of 8!)"; |
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211 } |
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212 |
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213 // if we want to enforce alignment, we need to use a freshly allocated |
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214 // buffer, since we have no alignment guarantees on the original one |
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215 if (enforceAligned_) |
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216 { |
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217 if (alignedImageBuffer_ != NULL) |
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218 free(alignedImageBuffer_); |
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219 alignedImageBuffer_ = malloc(pitch * height); |
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220 memcpy(alignedImageBuffer_, &content_[offset], pitch* height); |
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221 content_ = ""; |
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222 AssignWritable(format, width, height, pitch, alignedImageBuffer_); |
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223 } |
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224 else |
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225 { |
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226 AssignWritable(format, width, height, pitch, &content_[offset]); |
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227 } |
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228 |
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229 // Byte swapping if needed |
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230 if (bytesPerChannel != 1 && |
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231 bytesPerChannel != 2) |
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232 { |
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233 throw OrthancException(ErrorCode_NotImplemented); |
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234 } |
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235 |
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236 if (Toolbox::DetectEndianness() == Endianness_Little && |
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237 bytesPerChannel == 2) |
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238 { |
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239 for (unsigned int h = 0; h < height; ++h) |
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240 { |
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241 uint16_t* pixel = reinterpret_cast<uint16_t*>(GetRow(h)); |
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242 |
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243 for (unsigned int w = 0; w < GetWidth(); ++w, ++pixel) |
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244 { |
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245 #if ORTHANC_ENABLE_WASM == 1 |
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246 /* |
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247 |
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248 crash (2019-08-05): |
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249 |
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250 Uncaught abort(alignment fault) at Error |
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251 at jsStackTrace |
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252 at stackTrace |
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253 at abort |
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254 at alignfault |
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255 at SAFE_HEAP_LOAD_i32_2_2 (wasm-function[251132]:39) |
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256 at __ZN7Orthanc9PamReader12ParseContentEv (wasm-function[11457]:8088) |
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257 |
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258 Web Assembly IS LITTLE ENDIAN! |
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259 |
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260 Perhaps in htobe16 ? |
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261 */ |
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262 uint8_t* srcdst = reinterpret_cast<uint8_t*>(pixel); |
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263 uint8_t tmp = srcdst[0]; |
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264 srcdst[0] = srcdst[1]; |
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265 srcdst[1] = tmp; |
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266 #else |
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267 // memcpy() is necessary to avoid segmentation fault if the |
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268 // "pixel" pointer is not 16-bit aligned (which is the case |
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269 // if "offset" is an odd number). Check out issue #99: |
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270 // https://bitbucket.org/sjodogne/orthanc/issues/99 |
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271 uint16_t v = htobe16(*pixel); |
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272 memcpy(pixel, &v, sizeof(v)); |
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273 #endif |
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274 } |
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275 } |
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276 } |
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277 } |
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278 |
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279 |
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280 #if ORTHANC_SANDBOXED == 0 |
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281 void PamReader::ReadFromFile(const std::string& filename) |
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282 { |
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283 SystemToolbox::ReadFile(content_, filename); |
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284 ParseContent(); |
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285 } |
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286 #endif |
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287 |
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288 |
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289 void PamReader::ReadFromMemory(const std::string& buffer) |
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290 { |
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291 content_ = buffer; |
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292 ParseContent(); |
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293 } |
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294 |
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295 void PamReader::ReadFromMemory(const void* buffer, |
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296 size_t size) |
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297 { |
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298 content_.assign(reinterpret_cast<const char*>(buffer), size); |
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299 ParseContent(); |
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300 } |
3838 | 301 |
302 PamReader::~PamReader() | |
303 { | |
304 if (alignedImageBuffer_ != NULL) | |
305 { | |
306 free(alignedImageBuffer_); | |
307 } | |
308 } | |
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309 } |