Mercurial > hg > orthanc
annotate Core/DicomFormat/DicomIntegerPixelAccessor.cpp @ 335:daff912c9ffe
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 11 Jan 2013 14:54:39 +0100 |
| parents | 760d0f32cb34 |
| children | 80011cd589e6 |
| rev | line source |
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| 0 | 1 /** |
| 62 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 0 | 3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege, |
| 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> |
| 0 | 43 |
| 62 | 44 namespace Orthanc |
| 0 | 45 { |
| 77 | 46 static const DicomTag COLUMNS(0x0028, 0x0011); |
| 47 static const DicomTag ROWS(0x0028, 0x0010); | |
| 48 static const DicomTag SAMPLES_PER_PIXEL(0x0028, 0x0002); | |
| 49 static const DicomTag BITS_ALLOCATED(0x0028, 0x0100); | |
| 50 static const DicomTag BITS_STORED(0x0028, 0x0101); | |
| 51 static const DicomTag HIGH_BIT(0x0028, 0x0102); | |
| 52 static const DicomTag PIXEL_REPRESENTATION(0x0028, 0x0103); | |
| 53 | |
| 0 | 54 DicomIntegerPixelAccessor::DicomIntegerPixelAccessor(const DicomMap& values, |
| 55 const void* pixelData, | |
| 56 size_t size) : | |
| 57 pixelData_(pixelData), | |
| 58 size_(size) | |
| 59 { | |
| 60 unsigned int bitsAllocated; | |
| 61 unsigned int bitsStored; | |
| 62 unsigned int highBit; | |
| 63 unsigned int pixelRepresentation; | |
| 64 | |
| 65 try | |
| 66 { | |
| 77 | 67 width_ = boost::lexical_cast<unsigned int>(values.GetValue(COLUMNS).AsString()); |
| 68 height_ = boost::lexical_cast<unsigned int>(values.GetValue(ROWS).AsString()); | |
| 69 samplesPerPixel_ = boost::lexical_cast<unsigned int>(values.GetValue(SAMPLES_PER_PIXEL).AsString()); | |
| 70 bitsAllocated = boost::lexical_cast<unsigned int>(values.GetValue(BITS_ALLOCATED).AsString()); | |
| 71 bitsStored = boost::lexical_cast<unsigned int>(values.GetValue(BITS_STORED).AsString()); | |
| 72 highBit = boost::lexical_cast<unsigned int>(values.GetValue(HIGH_BIT).AsString()); | |
| 73 pixelRepresentation = boost::lexical_cast<unsigned int>(values.GetValue(PIXEL_REPRESENTATION).AsString()); | |
| 0 | 74 } |
| 75 catch (boost::bad_lexical_cast) | |
| 76 { | |
| 62 | 77 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 78 } |
| 79 | |
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80 frame_ = 0; |
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81 try |
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82 { |
| 80 | 83 numberOfFrames_ = boost::lexical_cast<unsigned int>(values.GetValue(DICOM_TAG_NUMBER_OF_FRAMES).AsString()); |
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84 } |
| 62 | 85 catch (OrthancException) |
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86 { |
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87 // If the tag "NumberOfFrames" is absent, assume there is a single frame |
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88 numberOfFrames_ = 1; |
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89 } |
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90 catch (boost::bad_lexical_cast) |
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91 { |
| 62 | 92 throw OrthancException(ErrorCode_NotImplemented); |
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93 } |
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94 |
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95 if ((bitsAllocated != 8 && bitsAllocated != 16 && |
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96 bitsAllocated != 24 && bitsAllocated != 32) || |
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97 numberOfFrames_ == 0) |
| 0 | 98 { |
| 62 | 99 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 100 } |
| 101 | |
| 102 if (bitsAllocated > 32 || | |
| 103 bitsStored >= 32) | |
| 104 { | |
| 105 // Not available, as the accessor internally uses int32_t values | |
| 62 | 106 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 107 } |
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108 |
| 0 | 109 if (samplesPerPixel_ != 1) |
| 110 { | |
| 62 | 111 throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 112 } |
| 113 | |
| 319 | 114 if (width_ * height_ * bitsAllocated / 8 * numberOfFrames_ > size) |
| 0 | 115 { |
| 319 | 116 throw OrthancException(ErrorCode_BadFileFormat); |
| 0 | 117 } |
| 118 | |
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119 /*printf("%d %d %d %d %d %d %d %d\n", width_, height_, samplesPerPixel_, bitsAllocated, |
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120 bitsStored, highBit, pixelRepresentation, numberOfFrames_);*/ |
| 0 | 121 |
| 122 bytesPerPixel_ = bitsAllocated / 8; | |
| 123 shift_ = highBit + 1 - bitsStored; | |
| 124 | |
| 125 if (pixelRepresentation) | |
| 126 { | |
| 127 mask_ = (1 << (bitsStored - 1)) - 1; | |
| 128 signMask_ = (1 << (bitsStored - 1)); | |
| 129 } | |
| 130 else | |
| 131 { | |
| 132 mask_ = (1 << bitsStored) - 1; | |
| 133 signMask_ = 0; | |
| 134 } | |
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135 |
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136 rowOffset_ = width_ * bytesPerPixel_; |
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137 frameOffset_ = height_ * width_ * bytesPerPixel_; |
| 0 | 138 } |
| 139 | |
| 140 | |
| 141 void DicomIntegerPixelAccessor::GetExtremeValues(int32_t& min, | |
| 142 int32_t& max) const | |
| 143 { | |
| 144 if (height_ == 0 || width_ == 0) | |
| 145 { | |
| 146 min = max = 0; | |
| 147 return; | |
| 148 } | |
| 149 | |
| 150 min = std::numeric_limits<int32_t>::max(); | |
| 151 max = std::numeric_limits<int32_t>::min(); | |
| 152 | |
| 153 for (unsigned int y = 0; y < height_; y++) | |
| 154 { | |
| 155 for (unsigned int x = 0; x < width_; x++) | |
| 156 { | |
| 157 int32_t v = GetValue(x, y); | |
| 158 if (v < min) | |
| 159 min = v; | |
| 160 if (v > max) | |
| 161 max = v; | |
| 162 } | |
| 163 } | |
| 164 } | |
| 165 | |
| 166 | |
| 167 int32_t DicomIntegerPixelAccessor::GetValue(unsigned int x, unsigned int y) const | |
| 168 { | |
| 169 assert(x < width_ && y < height_); | |
| 170 | |
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171 const uint8_t* pixel = reinterpret_cast<const uint8_t*>(pixelData_) + |
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172 y * rowOffset_ + x * bytesPerPixel_ + frame_ * frameOffset_; |
| 0 | 173 |
| 174 int32_t v; | |
| 175 v = pixel[0]; | |
| 176 if (bytesPerPixel_ >= 2) | |
| 177 v = v + (static_cast<int32_t>(pixel[1]) << 8); | |
| 178 if (bytesPerPixel_ >= 3) | |
| 179 v = v + (static_cast<int32_t>(pixel[2]) << 16); | |
| 180 if (bytesPerPixel_ >= 4) | |
| 181 v = v + (static_cast<int32_t>(pixel[3]) << 24); | |
| 182 | |
| 183 v = (v >> shift_) & mask_; | |
| 184 | |
| 185 if (v & signMask_) | |
| 186 { | |
| 187 // Signed value: Not implemented yet | |
| 62 | 188 //throw OrthancException(ErrorCode_NotImplemented); |
| 0 | 189 v = 0; |
| 190 } | |
| 191 | |
| 192 return v; | |
| 193 } | |
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194 |
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195 |
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196 void DicomIntegerPixelAccessor::SetCurrentFrame(unsigned int frame) |
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197 { |
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198 if (frame >= numberOfFrames_) |
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199 { |
| 62 | 200 throw OrthancException(ErrorCode_ParameterOutOfRange); |
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201 } |
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202 |
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203 frame_ = frame; |
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204 } |
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205 |
| 0 | 206 } |