Mercurial > hg > orthanc
annotate Core/DicomFormat/DicomIntegerPixelAccessor.cpp @ 472:722b56b99093
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 15 Jul 2013 13:50:36 +0200 |
parents | 7a966b440f19 |
children | 2890721b0f57 |
rev | line source |
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0 | 1 /** |
62 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
398 | 3 * Copyright (C) 2012-2013 Medical Physics Department, CHU of Liege, |
0 | 4 * Belgium |
5 * | |
6 * This program is free software: you can redistribute it and/or | |
7 * modify it under the terms of the GNU General Public License as | |
8 * published by the Free Software Foundation, either version 3 of the | |
9 * License, or (at your option) any later version. | |
136 | 10 * |
11 * In addition, as a special exception, the copyright holders of this | |
12 * program give permission to link the code of its release with the | |
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
14 * that use the same license as the "OpenSSL" library), and distribute | |
15 * the linked executables. You must obey the GNU General Public License | |
16 * in all respects for all of the code used other than "OpenSSL". If you | |
17 * modify file(s) with this exception, you may extend this exception to | |
18 * your version of the file(s), but you are not obligated to do so. If | |
19 * you do not wish to do so, delete this exception statement from your | |
20 * version. If you delete this exception statement from all source files | |
21 * in the program, then also delete it here. | |
0 | 22 * |
23 * This program is distributed in the hope that it will be useful, but | |
24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
26 * General Public License for more details. | |
27 * | |
28 * You should have received a copy of the GNU General Public License | |
29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
30 **/ | |
31 | |
32 | |
33 #include "DicomIntegerPixelAccessor.h" | |
34 | |
6 | 35 #ifndef NOMINMAX |
2 | 36 #define NOMINMAX |
6 | 37 #endif |
38 | |
79 | 39 #include "../OrthancException.h" |
0 | 40 #include <boost/lexical_cast.hpp> |
2 | 41 #include <limits> |
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42 #include <cassert> |
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43 #include <stdio.h> |
0 | 44 |
62 | 45 namespace Orthanc |
0 | 46 { |
77 | 47 static const DicomTag COLUMNS(0x0028, 0x0011); |
48 static const DicomTag ROWS(0x0028, 0x0010); | |
49 static const DicomTag SAMPLES_PER_PIXEL(0x0028, 0x0002); | |
50 static const DicomTag BITS_ALLOCATED(0x0028, 0x0100); | |
51 static const DicomTag BITS_STORED(0x0028, 0x0101); | |
52 static const DicomTag HIGH_BIT(0x0028, 0x0102); | |
53 static const DicomTag PIXEL_REPRESENTATION(0x0028, 0x0103); | |
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54 static const DicomTag PLANAR_CONFIGURATION(0x0028, 0x0006); |
77 | 55 |
0 | 56 DicomIntegerPixelAccessor::DicomIntegerPixelAccessor(const DicomMap& values, |
57 const void* pixelData, | |
58 size_t size) : | |
59 pixelData_(pixelData), | |
60 size_(size) | |
61 { | |
62 unsigned int bitsAllocated; | |
63 unsigned int bitsStored; | |
64 unsigned int highBit; | |
65 unsigned int pixelRepresentation; | |
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66 planarConfiguration_ = 0; |
0 | 67 |
68 try | |
69 { | |
77 | 70 width_ = boost::lexical_cast<unsigned int>(values.GetValue(COLUMNS).AsString()); |
71 height_ = boost::lexical_cast<unsigned int>(values.GetValue(ROWS).AsString()); | |
72 samplesPerPixel_ = boost::lexical_cast<unsigned int>(values.GetValue(SAMPLES_PER_PIXEL).AsString()); | |
73 bitsAllocated = boost::lexical_cast<unsigned int>(values.GetValue(BITS_ALLOCATED).AsString()); | |
74 bitsStored = boost::lexical_cast<unsigned int>(values.GetValue(BITS_STORED).AsString()); | |
75 highBit = boost::lexical_cast<unsigned int>(values.GetValue(HIGH_BIT).AsString()); | |
76 pixelRepresentation = boost::lexical_cast<unsigned int>(values.GetValue(PIXEL_REPRESENTATION).AsString()); | |
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77 |
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78 if (samplesPerPixel_ > 1) |
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79 { |
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80 // The "Planar Configuration" is only set when "Samples per Pixels" is greater than 1 |
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81 // https://www.dabsoft.ch/dicom/3/C.7.6.3.1.3/ |
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82 planarConfiguration_ = boost::lexical_cast<unsigned int>(values.GetValue(PLANAR_CONFIGURATION).AsString()); |
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83 } |
0 | 84 } |
85 catch (boost::bad_lexical_cast) | |
86 { | |
62 | 87 throw OrthancException(ErrorCode_NotImplemented); |
0 | 88 } |
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89 catch (OrthancException) |
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90 { |
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91 throw OrthancException(ErrorCode_NotImplemented); |
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92 } |
0 | 93 |
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94 frame_ = 0; |
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95 try |
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96 { |
80 | 97 numberOfFrames_ = boost::lexical_cast<unsigned int>(values.GetValue(DICOM_TAG_NUMBER_OF_FRAMES).AsString()); |
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98 } |
62 | 99 catch (OrthancException) |
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100 { |
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101 // If the tag "NumberOfFrames" is absent, assume there is a single frame |
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102 numberOfFrames_ = 1; |
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103 } |
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104 catch (boost::bad_lexical_cast) |
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105 { |
62 | 106 throw OrthancException(ErrorCode_NotImplemented); |
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107 } |
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108 |
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109 if ((bitsAllocated != 8 && bitsAllocated != 16 && |
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110 bitsAllocated != 24 && bitsAllocated != 32) || |
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111 numberOfFrames_ == 0 || |
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112 (planarConfiguration_ != 0 && planarConfiguration_ != 1)) |
0 | 113 { |
62 | 114 throw OrthancException(ErrorCode_NotImplemented); |
0 | 115 } |
116 | |
117 if (bitsAllocated > 32 || | |
118 bitsStored >= 32) | |
119 { | |
120 // Not available, as the accessor internally uses int32_t values | |
62 | 121 throw OrthancException(ErrorCode_NotImplemented); |
0 | 122 } |
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123 |
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124 if (samplesPerPixel_ == 0) |
0 | 125 { |
62 | 126 throw OrthancException(ErrorCode_NotImplemented); |
0 | 127 } |
128 | |
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129 bytesPerPixel_ = bitsAllocated / 8; |
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130 shift_ = highBit + 1 - bitsStored; |
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131 frameOffset_ = height_ * width_ * bytesPerPixel_ * samplesPerPixel_; |
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132 |
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133 if (numberOfFrames_ * frameOffset_ > size) |
0 | 134 { |
319 | 135 throw OrthancException(ErrorCode_BadFileFormat); |
0 | 136 } |
137 | |
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138 /*printf("%d %d %d %d %d %d %d %d\n", width_, height_, samplesPerPixel_, bitsAllocated, |
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139 bitsStored, highBit, pixelRepresentation, numberOfFrames_);*/ |
0 | 140 |
141 if (pixelRepresentation) | |
142 { | |
143 mask_ = (1 << (bitsStored - 1)) - 1; | |
144 signMask_ = (1 << (bitsStored - 1)); | |
145 } | |
146 else | |
147 { | |
148 mask_ = (1 << bitsStored) - 1; | |
149 signMask_ = 0; | |
150 } | |
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151 |
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152 if (planarConfiguration_ == 0) |
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153 { |
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154 /** |
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155 * The sample values for the first pixel are followed by the |
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156 * sample values for the second pixel, etc. For RGB images, this |
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157 * means the order of the pixel values sent shall be R1, G1, B1, |
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158 * R2, G2, B2, ..., etc. |
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159 **/ |
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160 rowOffset_ = width_ * bytesPerPixel_ * samplesPerPixel_; |
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161 } |
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162 else |
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163 { |
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164 /** |
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165 * Each color plane shall be sent contiguously. For RGB images, |
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166 * this means the order of the pixel values sent is R1, R2, R3, |
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167 * ..., G1, G2, G3, ..., B1, B2, B3, etc. |
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168 **/ |
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169 rowOffset_ = width_ * bytesPerPixel_; |
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170 } |
0 | 171 } |
172 | |
173 | |
174 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min, | |
175 int32_t& max) const | |
176 { | |
177 if (height_ == 0 || width_ == 0) | |
178 { | |
179 min = max = 0; | |
180 return; | |
181 } | |
182 | |
183 min = std::numeric_limits<int32_t>::max(); | |
184 max = std::numeric_limits<int32_t>::min(); | |
185 | |
186 for (unsigned int y = 0; y < height_; y++) | |
187 { | |
188 for (unsigned int x = 0; x < width_; x++) | |
189 { | |
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190 for (unsigned int c = 0; c < GetChannelCount(); c++) |
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191 { |
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192 int32_t v = GetValue(x, y); |
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193 if (v < min) |
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194 min = v; |
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195 if (v > max) |
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196 max = v; |
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197 } |
0 | 198 } |
199 } | |
200 } | |
201 | |
202 | |
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203 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x, |
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204 unsigned int y, |
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205 unsigned int channel) const |
0 | 206 { |
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207 assert(x < width_ && y < height_ && channel < samplesPerPixel_); |
0 | 208 |
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209 const uint8_t* pixel = reinterpret_cast<const uint8_t*>(pixelData_) + |
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210 y * rowOffset_ + frame_ * frameOffset_; |
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211 |
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212 // https://www.dabsoft.ch/dicom/3/C.7.6.3.1.3/ |
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213 if (planarConfiguration_ == 0) |
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214 { |
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215 /** |
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216 * The sample values for the first pixel are followed by the |
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217 * sample values for the second pixel, etc. For RGB images, this |
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218 * means the order of the pixel values sent shall be R1, G1, B1, |
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219 * R2, G2, B2, ..., etc. |
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220 **/ |
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221 pixel += channel * bytesPerPixel_ + x * samplesPerPixel_ * bytesPerPixel_; |
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222 } |
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223 else |
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224 { |
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225 /** |
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226 * Each color plane shall be sent contiguously. For RGB images, |
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227 * this means the order of the pixel values sent is R1, R2, R3, |
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228 * ..., G1, G2, G3, ..., B1, B2, B3, etc. |
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229 **/ |
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230 assert(frameOffset_ % samplesPerPixel_ == 0); |
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231 pixel += channel * frameOffset_ / samplesPerPixel_ + x * bytesPerPixel_; |
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232 } |
0 | 233 |
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234 uint32_t v; |
0 | 235 v = pixel[0]; |
236 if (bytesPerPixel_ >= 2) | |
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237 v = v + (static_cast<uint32_t>(pixel[1]) << 8); |
0 | 238 if (bytesPerPixel_ >= 3) |
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239 v = v + (static_cast<uint32_t>(pixel[2]) << 16); |
0 | 240 if (bytesPerPixel_ >= 4) |
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241 v = v + (static_cast<uint32_t>(pixel[3]) << 24); |
0 | 242 |
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243 v = v >> shift_; |
0 | 244 |
245 if (v & signMask_) | |
246 { | |
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247 // Signed value |
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248 // http://en.wikipedia.org/wiki/Two%27s_complement#Subtraction_from_2N |
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249 return -static_cast<int32_t>(mask_) + static_cast<int32_t>(v & mask_) - 1; |
0 | 250 } |
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251 else |
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252 { |
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253 // Unsigned value |
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254 return static_cast<int32_t>(v & mask_); |
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255 } |
0 | 256 } |
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257 |
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258 |
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259 void DicomIntegerPixelAccessor::SetCurrentFrame(unsigned int frame) |
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260 { |
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261 if (frame >= numberOfFrames_) |
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262 { |
62 | 263 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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264 } |
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265 |
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266 frame_ = frame; |
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267 } |
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268 |
0 | 269 } |