Mercurial > hg > orthanc
annotate OrthancFramework/Sources/DicomFormat/DicomIntegerPixelAccessor.cpp @ 4706:dbee8bd8ee1f
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 22 Jun 2021 09:13:03 +0200 |
| parents | d9473bd5ed43 |
| children | 381c2ca04860 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 62 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 1900 | 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 |
| 0 | 6 * |
| 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 Lesser General Public License |
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9 * as published by the Free Software Foundation, either version 3 of |
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10 * the License, or (at your option) any later version. |
| 136 | 11 * |
| 0 | 12 * This program is distributed in the hope that it will be useful, but |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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15 * Lesser General Public License for more details. |
| 0 | 16 * |
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17 * You should have received a copy of the GNU Lesser General Public |
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18 * License along with this program. If not, see |
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19 * <http://www.gnu.org/licenses/>. |
| 0 | 20 **/ |
| 21 | |
| 22 | |
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23 #include "../PrecompiledHeaders.h" |
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24 |
| 6 | 25 #ifndef NOMINMAX |
| 2 | 26 #define NOMINMAX |
| 6 | 27 #endif |
| 28 | |
| 627 | 29 #include "DicomIntegerPixelAccessor.h" |
| 30 | |
| 79 | 31 #include "../OrthancException.h" |
| 0 | 32 #include <boost/lexical_cast.hpp> |
| 2 | 33 #include <limits> |
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34 #include <cassert> |
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35 #include <stdio.h> |
| 0 | 36 |
| 62 | 37 namespace Orthanc |
| 0 | 38 { |
| 39 DicomIntegerPixelAccessor::DicomIntegerPixelAccessor(const DicomMap& values, | |
| 40 const void* pixelData, | |
| 41 size_t size) : | |
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42 information_(values), |
| 0 | 43 pixelData_(pixelData), |
| 44 size_(size) | |
| 45 { | |
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46 if (information_.GetBitsAllocated() > 32 || |
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47 information_.GetBitsStored() >= 32) |
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48 { |
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49 // Not available, as the accessor internally uses int32_t values |
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50 throw OrthancException(ErrorCode_NotImplemented); |
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51 } |
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52 |
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53 frame_ = 0; |
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54 frameOffset_ = information_.GetFrameSize(); |
| 0 | 55 |
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56 if (information_.GetNumberOfFrames() * frameOffset_ > size) |
| 0 | 57 { |
| 319 | 58 throw OrthancException(ErrorCode_BadFileFormat); |
| 0 | 59 } |
| 60 | |
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61 if (information_.IsSigned()) |
| 0 | 62 { |
| 537 | 63 // Pixels are signed |
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64 mask_ = (1 << (information_.GetBitsStored() - 1)) - 1; |
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65 signMask_ = (1 << (information_.GetBitsStored() - 1)); |
| 0 | 66 } |
| 67 else | |
| 68 { | |
| 537 | 69 // Pixels are unsigned |
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70 mask_ = (1 << information_.GetBitsStored()) - 1; |
| 0 | 71 signMask_ = 0; |
| 72 } | |
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73 |
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74 if (information_.IsPlanar()) |
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75 { |
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76 /** |
| 857 | 77 * Each color plane shall be sent contiguously. For RGB images, |
| 78 * this means the order of the pixel values sent is R1, R2, R3, | |
| 79 * ..., G1, G2, G3, ..., B1, B2, B3, etc. | |
| 80 **/ | |
| 860 | 81 rowOffset_ = information_.GetWidth() * information_.GetBytesPerValue(); |
| 857 | 82 } |
| 83 else | |
| 84 { | |
| 85 /** | |
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86 * The sample values for the first pixel are followed by the |
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87 * sample values for the second pixel, etc. For RGB images, this |
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88 * means the order of the pixel values sent shall be R1, G1, B1, |
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89 * R2, G2, B2, ..., etc. |
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90 **/ |
| 860 | 91 rowOffset_ = information_.GetWidth() * information_.GetBytesPerValue() * information_.GetChannelCount(); |
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92 } |
| 0 | 93 } |
| 94 | |
| 95 | |
| 96 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min, | |
| 97 int32_t& max) const | |
| 98 { | |
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99 if (information_.GetHeight() == 0 || information_.GetWidth() == 0) |
| 0 | 100 { |
| 101 min = max = 0; | |
| 102 return; | |
| 103 } | |
| 104 | |
| 105 min = std::numeric_limits<int32_t>::max(); | |
| 106 max = std::numeric_limits<int32_t>::min(); | |
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107 |
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108 const unsigned int height = information_.GetHeight(); |
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109 const unsigned int width = information_.GetWidth(); |
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110 const unsigned int channels = information_.GetChannelCount(); |
| 0 | 111 |
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112 for (unsigned int y = 0; y < height; y++) |
| 0 | 113 { |
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114 for (unsigned int x = 0; x < width; x++) |
| 0 | 115 { |
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116 for (unsigned int c = 0; c < channels; c++) |
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117 { |
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118 int32_t v = GetValue(x, y); |
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119 if (v < min) |
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120 min = v; |
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121 if (v > max) |
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122 max = v; |
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123 } |
| 0 | 124 } |
| 125 } | |
| 126 } | |
| 127 | |
| 128 | |
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129 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x, |
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130 unsigned int y, |
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131 unsigned int channel) const |
| 0 | 132 { |
| 857 | 133 assert(x < information_.GetWidth() && |
| 134 y < information_.GetHeight() && | |
| 135 channel < information_.GetChannelCount()); | |
| 0 | 136 |
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137 const uint8_t* pixel = reinterpret_cast<const uint8_t*>(pixelData_) + |
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138 y * rowOffset_ + frame_ * frameOffset_; |
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139 |
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140 // http://dicom.nema.org/medical/dicom/current/output/html/part03.html#sect_C.7.6.3.1.3 |
| 857 | 141 if (information_.IsPlanar()) |
| 142 { | |
| 143 /** | |
| 144 * Each color plane shall be sent contiguously. For RGB images, | |
| 145 * this means the order of the pixel values sent is R1, R2, R3, | |
| 146 * ..., G1, G2, G3, ..., B1, B2, B3, etc. | |
| 147 **/ | |
| 148 assert(frameOffset_ % information_.GetChannelCount() == 0); | |
| 860 | 149 pixel += channel * frameOffset_ / information_.GetChannelCount() + x * information_.GetBytesPerValue(); |
| 857 | 150 } |
| 151 else | |
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152 { |
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153 /** |
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154 * The sample values for the first pixel are followed by the |
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155 * sample values for the second pixel, etc. For RGB images, this |
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156 * means the order of the pixel values sent shall be R1, G1, B1, |
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157 * R2, G2, B2, ..., etc. |
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158 **/ |
| 860 | 159 pixel += channel * information_.GetBytesPerValue() + x * information_.GetChannelCount() * information_.GetBytesPerValue(); |
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160 } |
| 0 | 161 |
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162 uint32_t v; |
| 0 | 163 v = pixel[0]; |
| 860 | 164 if (information_.GetBytesPerValue() >= 2) |
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165 v = v + (static_cast<uint32_t>(pixel[1]) << 8); |
| 860 | 166 if (information_.GetBytesPerValue() >= 3) |
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167 v = v + (static_cast<uint32_t>(pixel[2]) << 16); |
| 860 | 168 if (information_.GetBytesPerValue() >= 4) |
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169 v = v + (static_cast<uint32_t>(pixel[3]) << 24); |
| 0 | 170 |
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171 v = v >> information_.GetShift(); |
| 0 | 172 |
| 173 if (v & signMask_) | |
| 174 { | |
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175 // Signed value |
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176 // http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction_from_2N |
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177 return -static_cast<int32_t>(mask_) + static_cast<int32_t>(v & mask_) - 1; |
| 0 | 178 } |
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179 else |
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180 { |
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181 // Unsigned value |
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182 return static_cast<int32_t>(v & mask_); |
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183 } |
| 0 | 184 } |
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185 |
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186 |
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187 void DicomIntegerPixelAccessor::SetCurrentFrame(unsigned int frame) |
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188 { |
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189 if (frame >= information_.GetNumberOfFrames()) |
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190 { |
| 62 | 191 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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192 } |
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193 |
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194 frame_ = frame; |
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195 } |
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196 |
| 0 | 197 } |