Mercurial > hg > orthanc

annotate OrthancFramework/Sources/DicomFormat/DicomIntegerPixelAccessor.cpp @ 4845:02d77189d8ba received-instance-callback

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added ReceivedInstanceCallback + sample C++ plugin
author Alain Mazy <am@osimis.io>
date Thu, 09 Dec 2021 17:22:40 +0100
parents 7053502fbf97
children 43e613a7756b
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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) 2017-2021 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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23
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24 #include "../PrecompiledHeaders.h"
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25
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26 #ifndef NOMINMAX
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27 #define NOMINMAX
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28 #endif
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29
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30 #include "DicomIntegerPixelAccessor.h"
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31
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32 #include "../OrthancException.h"
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33 #include <boost/lexical_cast.hpp>
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34 #include <limits>
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35 #include <cassert>
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36 #include <stdio.h>
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37
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38 namespace Orthanc
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39 {
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40 DicomIntegerPixelAccessor::DicomIntegerPixelAccessor(const DicomMap& values,
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41 const void* pixelData,
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42 size_t size) :
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43 information_(values),
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44 pixelData_(pixelData),
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45 size_(size)
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46 {
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47 if (information_.GetBitsAllocated() > 32 ||
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48 information_.GetBitsStored() >= 32)
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49 {
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50 // Not available, as the accessor internally uses int32_t values
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51 throw OrthancException(ErrorCode_NotImplemented);
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52 }
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53
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54 frame_ = 0;
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55 frameOffset_ = information_.GetFrameSize();
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56
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57 if (information_.GetNumberOfFrames() * frameOffset_ > size)
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58 {
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59 throw OrthancException(ErrorCode_BadFileFormat);
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60 }
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61
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62 if (information_.IsSigned())
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63 {
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64 // Pixels are signed
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65 mask_ = (1 << (information_.GetBitsStored() - 1)) - 1;
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66 signMask_ = (1 << (information_.GetBitsStored() - 1));
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67 }
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68 else
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69 {
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70 // Pixels are unsigned
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71 mask_ = (1 << information_.GetBitsStored()) - 1;
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72 signMask_ = 0;
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73 }
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75 if (information_.IsPlanar())
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76 {
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77 /**
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78 * Each color plane shall be sent contiguously. For RGB images,
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79 * this means the order of the pixel values sent is R1, R2, R3,
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80 * ..., G1, G2, G3, ..., B1, B2, B3, etc.
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81 **/
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82 rowOffset_ = information_.GetWidth() * information_.GetBytesPerValue();
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83 }
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84 else
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85 {
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86 /**
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87 * The sample values for the first pixel are followed by the
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88 * sample values for the second pixel, etc. For RGB images, this
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89 * means the order of the pixel values sent shall be R1, G1, B1,
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90 * R2, G2, B2, ..., etc.
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91 **/
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92 if (information_.GetBitsStored() == 1)
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93 {
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94 if (information_.GetChannelCount() == 1 &&
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95 information_.GetBitsAllocated() == 1)
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96 {
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97 assert(information_.GetWidth() % 8 == 0); // Tested by DicomImageInformation
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98 rowOffset_ = information_.GetWidth() / 8;
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99 }
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100 else
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101 {
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102 throw OrthancException(ErrorCode_IncompatibleImageFormat,
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103 "Image not supported (multi-channel black-and-image image)");
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104 }
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105 }
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106 else
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107 {
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108 rowOffset_ = information_.GetWidth() * information_.GetBytesPerValue() * information_.GetChannelCount();
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109 }
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110 }
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111 }
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113
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114 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min,
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115 int32_t& max) const
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116 {
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117 if (information_.GetHeight() == 0 || information_.GetWidth() == 0)
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118 {
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119 min = max = 0;
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120 return;
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121 }
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122
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123 min = std::numeric_limits<int32_t>::max();
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124 max = std::numeric_limits<int32_t>::min();
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125
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126 const unsigned int height = information_.GetHeight();
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127 const unsigned int width = information_.GetWidth();
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128 const unsigned int channels = information_.GetChannelCount();
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129
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130 for (unsigned int y = 0; y < height; y++)
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131 {
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132 for (unsigned int x = 0; x < width; x++)
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133 {
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134 for (unsigned int c = 0; c < channels; c++)
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135 {
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136 int32_t v = GetValue(x, y, c);
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137 if (v < min)
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138 min = v;
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139 if (v > max)
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140 max = v;
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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
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146
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147 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x,
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148 unsigned int y,
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149 unsigned int channel) const
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150 {
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151 assert(x < information_.GetWidth() &&
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152 y < information_.GetHeight() &&
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153 channel < information_.GetChannelCount());
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154
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155 const uint8_t* pixel = (reinterpret_cast<const uint8_t*>(pixelData_) +
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156 y * rowOffset_ + frame_ * frameOffset_);
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157
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158 if (information_.GetBitsStored() == 1)
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159 {
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160 // New in Orthanc 1.9.8, notably for DICOM SEG
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161 assert(information_.GetBitsAllocated() == 1 &&
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162 information_.GetChannelCount() == 1 &&
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163 !information_.IsPlanar());
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164
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165 uint8_t b = pixel[x / 8];
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166
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167 if (b & (1 << (x % 8)))
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168 {
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169 return 255;
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170 }
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171 else
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172 {
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173 return 0;
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174 }
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175 }
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176 else
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177 {
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178 // http://dicom.nema.org/medical/dicom/current/output/html/part03.html#sect_C.7.6.3.1.3
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179 if (information_.IsPlanar())
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180 {
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181 /**
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182 * Each color plane shall be sent contiguously. For RGB images,
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183 * this means the order of the pixel values sent is R1, R2, R3,
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184 * ..., G1, G2, G3, ..., B1, B2, B3, etc.
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185 **/
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186 assert(frameOffset_ % information_.GetChannelCount() == 0);
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187 pixel += channel * frameOffset_ / information_.GetChannelCount() + x * information_.GetBytesPerValue();
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188 }
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189 else
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190 {
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191 /**
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192 * The sample values for the first pixel are followed by the
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193 * sample values for the second pixel, etc. For RGB images, this
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194 * means the order of the pixel values sent shall be R1, G1, B1,
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195 * R2, G2, B2, ..., etc.
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196 **/
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197 pixel += channel * information_.GetBytesPerValue() + x * information_.GetChannelCount() * information_.GetBytesPerValue();
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198 }
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199
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200 uint32_t v;
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201 v = pixel[0];
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202 if (information_.GetBytesPerValue() >= 2)
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203 v = v + (static_cast<uint32_t>(pixel[1]) << 8);
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204 if (information_.GetBytesPerValue() >= 3)
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205 v = v + (static_cast<uint32_t>(pixel[2]) << 16);
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206 if (information_.GetBytesPerValue() >= 4)
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207 v = v + (static_cast<uint32_t>(pixel[3]) << 24);
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208
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209 v = v >> information_.GetShift();
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210
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211 if (v & signMask_)
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212 {
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213 // Signed value
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214 // http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction_from_2N
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215 return -static_cast<int32_t>(mask_) + static_cast<int32_t>(v & mask_) - 1;
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216 }
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217 else
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218 {
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219 // Unsigned value
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220 return static_cast<int32_t>(v & mask_);
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221 }
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222 }
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223 }
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224
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225
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226 void DicomIntegerPixelAccessor::SetCurrentFrame(unsigned int frame)
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227 {
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228 if (frame >= information_.GetNumberOfFrames())
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229 {
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230 throw OrthancException(ErrorCode_ParameterOutOfRange);
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231 }
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232
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233 frame_ = frame;
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234 }
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235
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236 }