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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 Affero General Public License
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8 * as published by the Free Software Foundation, either version 3 of
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9 * the License, or (at your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Affero General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Affero General Public License
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 **/
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19
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20
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21 #include "Enumerations.h"
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22
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23 #include "Jpeg2000Reader.h"
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24 #include "Orthanc/Core/OrthancException.h"
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25 #include "Orthanc/Core/Toolbox.h"
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26
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27 #include <string.h>
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28 #include <boost/algorithm/string/predicate.hpp>
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29
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30 #define HEADER(s) (const void*) (s), sizeof(s)-1
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31
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32 namespace OrthancWSI
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33 {
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34 const char* EnumerationToString(ImageCompression compression)
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35 {
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36 switch (compression)
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37 {
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38 case ImageCompression_Unknown:
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39 return "Unknown";
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40
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41 case ImageCompression_None:
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42 return "Raw image";
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43
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44 case ImageCompression_Png:
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45 return "PNG";
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46
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47 case ImageCompression_Jpeg:
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48 return "JPEG";
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49
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50 case ImageCompression_Jpeg2000:
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51 return "JPEG2000";
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52
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53 case ImageCompression_Tiff:
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54 return "TIFF";
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55
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56 case ImageCompression_Dicom:
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57 return "DICOM";
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58
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59 default:
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60 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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61 }
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62 }
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63
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64
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65 static bool MatchHeader(const void* actual,
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66 size_t actualSize,
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67 const void* expected,
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68 size_t expectedSize)
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69 {
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70 if (actualSize < expectedSize)
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71 {
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72 return false;
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73 }
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74 else
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75 {
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76 return memcmp(actual, expected, expectedSize) == 0;
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77 }
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78 }
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79
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80
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81 ImageCompression DetectFormatFromFile(const std::string& path)
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82 {
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83 std::string header;
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84 Orthanc::Toolbox::ReadHeader(header, path, 256);
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85
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86 ImageCompression tmp = DetectFormatFromMemory(header.c_str(), header.size());
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87 if (tmp != ImageCompression_Unknown)
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88 {
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89 return tmp;
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90 }
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91
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92 // Cannot detect the format using the header, fallback to the use
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93 // of the filename extension
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94
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95 std::string lower;
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96 Orthanc::Toolbox::ToLowerCase(lower, path);
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97
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98 if (boost::algorithm::ends_with(lower, ".jpeg") ||
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99 boost::algorithm::ends_with(lower, ".jpg"))
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100 {
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101 return ImageCompression_Jpeg;
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102 }
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103
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104 if (boost::algorithm::ends_with(lower, ".png"))
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105 {
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106 return ImageCompression_Png;
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107 }
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108
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109 if (boost::algorithm::ends_with(lower, ".tiff") ||
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110 boost::algorithm::ends_with(lower, ".tif"))
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111 {
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112 return ImageCompression_Tiff;
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113 }
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114
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115 if (boost::algorithm::ends_with(lower, ".jp2") ||
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116 boost::algorithm::ends_with(lower, ".j2k"))
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117 {
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118 return ImageCompression_Jpeg2000;
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119 }
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120
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121 if (boost::algorithm::ends_with(lower, ".dcm"))
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122 {
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123 return ImageCompression_Dicom;
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124 }
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125
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126 return ImageCompression_Unknown;
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127 }
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128
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129
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130 ImageCompression DetectFormatFromMemory(const void* buffer,
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131 size_t size)
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132 {
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133 if (MatchHeader(buffer, size, HEADER("\377\330\377")))
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134 {
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135 return ImageCompression_Jpeg;
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136 }
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137
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138 if (MatchHeader(buffer, size, HEADER("\xff\x4f\xff\x51")) ||
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139 MatchHeader(buffer, size, HEADER("\x00\x00\x00\x0c\x6a\x50\x20\x20\x0d\x0a\x87\x0a")))
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140 {
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141 return ImageCompression_Jpeg2000;
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142 }
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143
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144 if (MatchHeader(buffer, size, HEADER("\211PNG\r\n\032\n")))
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145 {
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146 return ImageCompression_Png;
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147 }
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148
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149 if (MatchHeader(buffer, size, HEADER("\115\115\000\052")) ||
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150 MatchHeader(buffer, size, HEADER("\111\111\052\000")) ||
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151 MatchHeader(buffer, size, HEADER("\115\115\000\053\000\010\000\000")) ||
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152 MatchHeader(buffer, size, HEADER("\111\111\053\000\010\000\000\000")))
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153 {
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154 return ImageCompression_Tiff;
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155 }
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156
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157 if (size >= 128 + 4 &&
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158 MatchHeader(reinterpret_cast<const uint8_t*>(buffer) + 128, size - 128, HEADER("DICM")))
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159 {
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160 bool ok = true;
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161 for (size_t i = 0; ok && i < 128; i++)
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162 {
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163 if (reinterpret_cast<const uint8_t*>(buffer)[i] != 0)
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164 {
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165 ok = false;
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166 }
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167 }
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168
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169 if (ok)
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170 {
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171 return ImageCompression_Dicom;
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172 }
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173 }
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174
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175 Jpeg2000Format jpeg2000 = Jpeg2000Reader::DetectFormatFromMemory(buffer, size);
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176 if (jpeg2000 == Jpeg2000Format_JP2 ||
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177 jpeg2000 == Jpeg2000Format_J2K)
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178 {
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179 return ImageCompression_Jpeg2000;
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180 }
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181
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182 return ImageCompression_Unknown;
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183 }
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184 }
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