Mercurial > hg > orthanc

annotate OrthancFramework/Sources/DicomFormat/DicomStreamReader.cpp @ 5676:b744a2cf408a find-refactoring tip

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shorten ParentRetrieveSpecification/ChildrenRetrieveSpecification as ParentSpecification/ChildrenSpecification
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 06 Jul 2024 15:04:28 +0200
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children
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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23
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24
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25 #include "../PrecompiledHeaders.h"
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26 #include "DicomStreamReader.h"
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27
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28 #include "../OrthancException.h"
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29
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30 #include <cassert>
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31 #include <sstream>
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32 #include <boost/iostreams/device/array.hpp>
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33 #include <boost/iostreams/stream.hpp>
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34
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35
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36 #include <iostream>
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37
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38 namespace Orthanc
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39 {
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40 static bool IsNormalizationNeeded(const std::string& source,
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41 ValueRepresentation vr)
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42 {
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43 return (!source.empty() &&
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44 (source[source.size() - 1] == ' ' ||
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45 source[source.size() - 1] == '\0') &&
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46 // Normalization only applies to string-based VR
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47 (vr == ValueRepresentation_ApplicationEntity ||
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48 vr == ValueRepresentation_AgeString ||
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49 vr == ValueRepresentation_CodeString ||
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50 vr == ValueRepresentation_DecimalString ||
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51 vr == ValueRepresentation_IntegerString ||
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52 vr == ValueRepresentation_LongString ||
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53 vr == ValueRepresentation_LongText ||
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54 vr == ValueRepresentation_PersonName ||
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55 vr == ValueRepresentation_ShortString ||
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56 vr == ValueRepresentation_ShortText ||
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57 vr == ValueRepresentation_UniqueIdentifier ||
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58 vr == ValueRepresentation_UnlimitedText));
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59 }
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60
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61
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62 static void NormalizeValue(std::string& inplace,
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63 ValueRepresentation vr)
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64 {
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65 if (IsNormalizationNeeded(inplace, vr))
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66 {
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67 assert(!inplace.empty());
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68 inplace.resize(inplace.size() - 1);
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69 }
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70 }
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71
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72
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73 static uint16_t ReadUnsignedInteger16(const char* dicom,
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74 bool littleEndian)
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75 {
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76 const uint8_t* p = reinterpret_cast<const uint8_t*>(dicom);
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77
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78 if (littleEndian)
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79 {
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80 return (static_cast<uint16_t>(p[0]) |
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81 (static_cast<uint16_t>(p[1]) << 8));
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82 }
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83 else
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84 {
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85 return (static_cast<uint16_t>(p[1]) |
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86 (static_cast<uint16_t>(p[0]) << 8));
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87 }
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88 }
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89
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90
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91 static uint32_t ReadUnsignedInteger32(const char* dicom,
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92 bool littleEndian)
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93 {
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94 const uint8_t* p = reinterpret_cast<const uint8_t*>(dicom);
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95
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96 if (littleEndian)
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97 {
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98 return (static_cast<uint32_t>(p[0]) |
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99 (static_cast<uint32_t>(p[1]) << 8) |
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100 (static_cast<uint32_t>(p[2]) << 16) |
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101 (static_cast<uint32_t>(p[3]) << 24));
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102 }
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103 else
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104 {
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105 return (static_cast<uint32_t>(p[3]) |
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106 (static_cast<uint32_t>(p[2]) << 8) |
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107 (static_cast<uint32_t>(p[1]) << 16) |
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108 (static_cast<uint32_t>(p[0]) << 24));
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109 }
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110 }
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111
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112
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113 static DicomTag ReadTag(const char* dicom,
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114 bool littleEndian)
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115 {
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116 return DicomTag(ReadUnsignedInteger16(dicom, littleEndian),
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117 ReadUnsignedInteger16(dicom + 2, littleEndian));
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118 }
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119
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120
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121 static bool IsShortExplicitTag(ValueRepresentation vr)
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122 {
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123 /**
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124 * Are we in the case of Table 7.1-2? "Data Element with
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125 * Explicit VR of AE, AS, AT, CS, DA, DS, DT, FL, FD, IS, LO,
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126 * LT, PN, SH, SL, SS, ST, TM, UI, UL and US"
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127 * http://dicom.nema.org/medical/dicom/current/output/chtml/part05/chapter_7.html#sect_7.1.2
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128 **/
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129 return (vr == ValueRepresentation_ApplicationEntity /* AE */ ||
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130 vr == ValueRepresentation_AgeString /* AS */ ||
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131 vr == ValueRepresentation_AttributeTag /* AT */ ||
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132 vr == ValueRepresentation_CodeString /* CS */ ||
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diff changeset
133 vr == ValueRepresentation_Date /* DA */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
134 vr == ValueRepresentation_DecimalString /* DS */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
135 vr == ValueRepresentation_DateTime /* DT */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
136 vr == ValueRepresentation_FloatingPointSingle /* FL */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
137 vr == ValueRepresentation_FloatingPointDouble /* FD */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
138 vr == ValueRepresentation_IntegerString /* IS */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
139 vr == ValueRepresentation_LongString /* LO */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
140 vr == ValueRepresentation_LongText /* LT */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
141 vr == ValueRepresentation_PersonName /* PN */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
142 vr == ValueRepresentation_ShortString /* SH */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
143 vr == ValueRepresentation_SignedLong /* SL */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
144 vr == ValueRepresentation_SignedShort /* SS */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
145 vr == ValueRepresentation_ShortText /* ST */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
146 vr == ValueRepresentation_Time /* TM */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
147 vr == ValueRepresentation_UniqueIdentifier /* UI */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
148 vr == ValueRepresentation_UnsignedLong /* UL */ ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
149 vr == ValueRepresentation_UnsignedShort /* US */);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
150 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
151
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
152
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
153 bool DicomStreamReader::IsLittleEndian() const
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
154 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
155 return (transferSyntax_ != DicomTransferSyntax_BigEndianExplicit);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
156 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
157
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
158
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
159 void DicomStreamReader::HandlePreamble(IVisitor& visitor,
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
160 const std::string& block)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
161 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
162 assert(block.size() == 144u);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
163 assert(reader_.GetProcessedBytes() == 144u);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
164
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
165 /**
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Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
166 * The "DICOM file meta information" is always encoded using
92a21efa5c96 reorganization of DicomStreamReader
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diff changeset
167 * "Explicit VR Little Endian Transfer Syntax"
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
168 * http://dicom.nema.org/medical/dicom/current/output/chtml/part10/chapter_7.html
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
169 **/
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
170 if (block[128] != 'D' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
171 block[129] != 'I' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
172 block[130] != 'C' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
173 block[131] != 'M' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
174 ReadTag(block.c_str() + 132, true) != DicomTag(0x0002, 0x0000) ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
175 block[136] != 'U' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
176 block[137] != 'L' ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
177 ReadUnsignedInteger16(block.c_str() + 138, true) != 4)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
178 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
179 throw OrthancException(ErrorCode_BadFileFormat);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
180 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
181
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
182 uint32_t length = ReadUnsignedInteger32(block.c_str() + 140, true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
183
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
184 reader_.Schedule(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
185 state_ = State_MetaHeader;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
186 }
92a21efa5c96 reorganization of DicomStreamReader
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diff changeset
187
4221
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parents: 4220
diff changeset
188
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
189 void DicomStreamReader::HandleMetaHeader(IVisitor& visitor,
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
190 const std::string& block)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
191 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
192 size_t pos = 0;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
193 const char* p = block.c_str();
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
194
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
195 bool hasTransferSyntax = false;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
196
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
197 while (pos + 8 <= block.size())
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
198 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
199 DicomTag tag = ReadTag(p + pos, true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
200
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
201 ValueRepresentation vr = StringToValueRepresentation(std::string(p + pos + 4, 2), true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
202
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
203 if (IsShortExplicitTag(vr))
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
204 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
205 uint16_t length = ReadUnsignedInteger16(p + pos + 6, true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
206
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
207 std::string value;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
208 value.assign(p + pos + 8, length);
4221
e4c0218b6b23 better normalization in stream reader
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parents: 4220
diff changeset
209 NormalizeValue(value, vr);
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
210
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
211 if (tag.GetGroup() == 0x0002)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
212 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
213 visitor.VisitMetaHeaderTag(tag, vr, value);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
214 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
215
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
216 if (tag == DICOM_TAG_TRANSFER_SYNTAX_UID)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
217 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
218 if (LookupTransferSyntax(transferSyntax_, value))
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
219 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
220 hasTransferSyntax = true;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
221 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
222 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
223 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
224 throw OrthancException(ErrorCode_NotImplemented, "Unsupported transfer syntax: " + value);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
225 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
226 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
227
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
228 pos += length + 8;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
229 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
230 else if (pos + 12 <= block.size())
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
231 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
232 uint16_t reserved = ReadUnsignedInteger16(p + pos + 6, true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
233 if (reserved != 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
234 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
235 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
236 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
237
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
238 uint32_t length = ReadUnsignedInteger32(p + pos + 8, true);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
239
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
240 if (tag.GetGroup() == 0x0002)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
241 {
4221
e4c0218b6b23 better normalization in stream reader
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4220
diff changeset
242 std::string value;
e4c0218b6b23 better normalization in stream reader
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4220
diff changeset
243 value.assign(p + pos + 12, length);
e4c0218b6b23 better normalization in stream reader
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4220
diff changeset
244 NormalizeValue(value, vr);
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
245 visitor.VisitMetaHeaderTag(tag, vr, value);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
246 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
247
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
248 pos += length + 12;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
249 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
250 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
251
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
252 if (pos != block.size())
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
253 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
254 throw OrthancException(ErrorCode_BadFileFormat);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
255 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
256
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
257 if (!hasTransferSyntax)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
258 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
259 throw OrthancException(ErrorCode_BadFileFormat, "DICOM file meta-header without transfer syntax UID");
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
260 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
261
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
262 visitor.VisitTransferSyntax(transferSyntax_);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
263
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
264 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
265 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
266 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
267
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
268
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
269 void DicomStreamReader::HandleDatasetTag(const std::string& block,
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
270 const DicomTag& untilTag)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
271 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
272 static const DicomTag DICOM_TAG_SEQUENCE_ITEM(0xfffe, 0xe000);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
273 static const DicomTag DICOM_TAG_SEQUENCE_DELIMITATION_ITEM(0xfffe, 0xe00d);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
274 static const DicomTag DICOM_TAG_SEQUENCE_DELIMITATION_SEQUENCE(0xfffe, 0xe0dd);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
275
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
276 assert(block.size() == 8u);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
277
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
278 const bool littleEndian = IsLittleEndian();
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
279 DicomTag tag = ReadTag(block.c_str(), littleEndian);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
280
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
281 if (sequenceDepth_ == 0 &&
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
282 tag >= untilTag)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
283 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
284 state_ = State_Done;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
285 return;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
286 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
287
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
288 if (tag == DICOM_TAG_SEQUENCE_ITEM ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
289 tag == DICOM_TAG_SEQUENCE_DELIMITATION_ITEM ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
290 tag == DICOM_TAG_SEQUENCE_DELIMITATION_SEQUENCE)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
291 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
292 // The special sequence items are encoded like "Implicit VR"
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
293 uint32_t length = ReadUnsignedInteger32(block.c_str() + 4, littleEndian);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
294
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
295 if (tag == DICOM_TAG_SEQUENCE_ITEM)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
296 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
297 if (length == 0xffffffffu)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
298 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
299 // Undefined length: Need to loop over the tags of the nested dataset
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
300 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
301 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
302 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
303 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
304 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
305 // Explicit length: Can skip the full sequence at once
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
306 reader_.Schedule(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
307 state_ = State_DatasetValue;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
308 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
309 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
310 else if (tag == DICOM_TAG_SEQUENCE_DELIMITATION_ITEM ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
311 tag == DICOM_TAG_SEQUENCE_DELIMITATION_SEQUENCE)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
312 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
313 if (length != 0 ||
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
314 sequenceDepth_ == 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
315 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
316 throw OrthancException(ErrorCode_BadFileFormat);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
317 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
318
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
319 if (tag == DICOM_TAG_SEQUENCE_DELIMITATION_SEQUENCE)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
320 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
321 sequenceDepth_ --;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
322 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
323
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
324 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
325 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
326 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
327 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
328 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
329 throw OrthancException(ErrorCode_InternalError);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
330 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
331 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
332 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
333 {
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
334 assert(reader_.GetProcessedBytes() >= block.size());
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
335 const uint64_t tagOffset = reader_.GetProcessedBytes() - block.size();
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
336
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
337 ValueRepresentation vr = ValueRepresentation_Unknown;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
338
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
339 if (transferSyntax_ == DicomTransferSyntax_LittleEndianImplicit)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
340 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
341 if (sequenceDepth_ == 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
342 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
343 danglingTag_ = tag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
344 danglingVR_ = vr;
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
345 danglingOffset_ = tagOffset;
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
346 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
347
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
348 uint32_t length = ReadUnsignedInteger32(block.c_str() + 4, true /* little endian */);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
349 HandleDatasetExplicitLength(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
350 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
351 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
352 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
353 // This in an explicit transfer syntax
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
354
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
355 vr = StringToValueRepresentation(
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
356 std::string(block.c_str() + 4, 2), false /* ignore unknown VR */);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
357
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
358 if (vr == ValueRepresentation_Sequence)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
359 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
360 sequenceDepth_ ++;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
361 reader_.Schedule(4);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
362 state_ = State_SequenceExplicitLength;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
363 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
364 else if (IsShortExplicitTag(vr))
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
365 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
366 uint16_t length = ReadUnsignedInteger16(block.c_str() + 6, littleEndian);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
367
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
368 reader_.Schedule(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
369 state_ = State_DatasetValue;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
370 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
371 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
372 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
373 uint16_t reserved = ReadUnsignedInteger16(block.c_str() + 6, littleEndian);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
374 if (reserved != 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
375 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
376 throw OrthancException(ErrorCode_BadFileFormat);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
377 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
378
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
379 reader_.Schedule(4);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
380 state_ = State_DatasetExplicitLength;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
381 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
382
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
383 if (sequenceDepth_ == 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
384 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
385 danglingTag_ = tag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
386 danglingVR_ = vr;
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
387 danglingOffset_ = tagOffset;
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
388 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
389 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
390 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
391 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
392
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
393
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
394 void DicomStreamReader::HandleDatasetExplicitLength(uint32_t length)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
395 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
396 if (length == 0xffffffffu)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
397 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
398 /**
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
399 * This is the case of pixel data with compressed transfer
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
400 * syntaxes. Schedule the reading of the first tag of the
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
401 * nested dataset.
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
402 * http://dicom.nema.org/medical/dicom/current/output/chtml/part05/sect_7.5.html
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
403 **/
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
404 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
405 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
406 sequenceDepth_ ++;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
407 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
408 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
409 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
410 reader_.Schedule(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
411 state_ = State_DatasetValue;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
412 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
413 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
414
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
415
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
416 void DicomStreamReader::HandleDatasetExplicitLength(IVisitor& visitor,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
417 const std::string& block)
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
418 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
419 assert(block.size() == 4);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
420
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
421 uint32_t length = ReadUnsignedInteger32(block.c_str(), IsLittleEndian());
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
422 HandleDatasetExplicitLength(length);
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
423
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
424 std::string empty;
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
425 if (!visitor.VisitDatasetTag(danglingTag_, danglingVR_, empty, IsLittleEndian(), danglingOffset_))
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
426 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
427 state_ = State_Done;
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
428 }
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
429 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
430
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
431
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
432 void DicomStreamReader::HandleSequenceExplicitLength(const std::string& block)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
433 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
434 assert(block.size() == 4);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
435
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
436 uint32_t length = ReadUnsignedInteger32(block.c_str(), IsLittleEndian());
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
437 if (length == 0xffffffffu)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
438 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
439 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
440 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
441 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
442 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
443 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
444 reader_.Schedule(length);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
445 state_ = State_SequenceExplicitValue;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
446 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
447 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
448
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
449
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
450 void DicomStreamReader::HandleSequenceExplicitValue()
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
451 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
452 if (sequenceDepth_ == 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
453 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
454 throw OrthancException(ErrorCode_InternalError);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
455 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
456
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
457 sequenceDepth_ --;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
458
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
459 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
460 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
461 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
462
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
463
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
464 void DicomStreamReader::HandleDatasetValue(IVisitor& visitor,
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
465 const std::string& block)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
466 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
467 if (sequenceDepth_ == 0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
468 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
469 bool c;
4221
e4c0218b6b23 better normalization in stream reader
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4220
diff changeset
470
e4c0218b6b23 better normalization in stream reader
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4220
diff changeset
471 if (IsNormalizationNeeded(block, danglingVR_))
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
472 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
473 std::string s(block.begin(), block.end() - 1);
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
474 c = visitor.VisitDatasetTag(danglingTag_, danglingVR_, s, IsLittleEndian(), danglingOffset_);
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
475 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
476 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
477 {
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
478 c = visitor.VisitDatasetTag(danglingTag_, danglingVR_, block, IsLittleEndian(), danglingOffset_);
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
479 }
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
480
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
481 if (!c)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
482 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
483 state_ = State_Done;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
484 return;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
485 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
486 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
487
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
488 reader_.Schedule(8);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
489 state_ = State_DatasetTag;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
490 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
491
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
492
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
493 DicomStreamReader::DicomStreamReader(std::istream& stream) :
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
494 reader_(stream),
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
495 state_(State_Preamble),
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
496 transferSyntax_(DicomTransferSyntax_LittleEndianImplicit), // Dummy
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
497 danglingTag_(0x0000, 0x0000), // Dummy
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
498 danglingVR_(ValueRepresentation_Unknown), // Dummy
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
499 danglingOffset_(0), // Dummy
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
500 sequenceDepth_(0)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
501 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
502 reader_.Schedule(128 /* empty header */ +
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
503 4 /* "DICM" magic value */ +
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
504 4 /* (0x0002, 0x0000) tag */ +
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
505 2 /* value representation of (0x0002, 0x0000) == "UL" */ +
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
506 2 /* length of "UL" value == 4 */ +
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
507 4 /* actual length of the meta-header */);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
508 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
509
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
510
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
511 void DicomStreamReader::Consume(IVisitor& visitor,
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
512 const DicomTag& untilTag)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
513 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
514 while (state_ != State_Done)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
515 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
516 std::string block;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
517 if (reader_.Read(block))
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
518 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
519 switch (state_)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
520 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
521 case State_Preamble:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
522 HandlePreamble(visitor, block);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
523 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
524
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
525 case State_MetaHeader:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
526 HandleMetaHeader(visitor, block);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
527 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
528
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
529 case State_DatasetTag:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
530 HandleDatasetTag(block, untilTag);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
531 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
532
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
533 case State_DatasetExplicitLength:
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
534 HandleDatasetExplicitLength(visitor, block);
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
535 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
536
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
537 case State_SequenceExplicitLength:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
538 HandleSequenceExplicitLength(block);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
539 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
540
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
541 case State_SequenceExplicitValue:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
542 HandleSequenceExplicitValue();
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
543 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
544
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
545 case State_DatasetValue:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
546 HandleDatasetValue(visitor, block);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
547 break;
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
548
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
549 default:
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
550 throw OrthancException(ErrorCode_InternalError);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
551 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
552 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
553 else
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
554 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
555 return; // No more data in the stream
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
556 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
557 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
558 }
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
559
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
560
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
561 void DicomStreamReader::Consume(IVisitor& visitor)
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
562 {
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
563 DicomTag untilTag(0xffff, 0xffff);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
564 Consume(visitor, untilTag);
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
565 }
4277
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
566
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
567
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
568 bool DicomStreamReader::IsDone() const
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
569 {
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
570 return (state_ == State_Done);
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
571 }
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
572
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
573
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
574 uint64_t DicomStreamReader::GetProcessedBytes() const
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
575 {
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
576 return reader_.GetProcessedBytes();
c5ca798b158a CheckOrthancFrameworkSymbols.py
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4222
diff changeset
577 }
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
578
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
579
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
580 class DicomStreamReader::PixelDataVisitor : public DicomStreamReader::IVisitor
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
581 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
582 private:
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
583 bool hasPixelData_;
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
584 uint64_t pixelDataOffset_;
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
585 ValueRepresentation pixelDataVR_;
5324
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
586 DicomTransferSyntax transferSyntax_;
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
587
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
588 public:
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
589 PixelDataVisitor() :
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
590 hasPixelData_(false),
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
591 pixelDataOffset_(0),
5324
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
592 pixelDataVR_(ValueRepresentation_Unknown),
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
593 transferSyntax_(DicomTransferSyntax_LittleEndianImplicit) // Default DICOM transfer syntax
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
594 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
595 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
596
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
597 virtual void VisitMetaHeaderTag(const DicomTag& tag,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
598 const ValueRepresentation& vr,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
599 const std::string& value) ORTHANC_OVERRIDE
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
600 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
601 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
602
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
603 virtual void VisitTransferSyntax(DicomTransferSyntax transferSyntax) ORTHANC_OVERRIDE
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
604 {
5324
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
605 transferSyntax_ = transferSyntax;
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
606 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
607
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
608 virtual bool VisitDatasetTag(const DicomTag& tag,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
609 const ValueRepresentation& vr,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
610 const std::string& value,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
611 bool isLittleEndian,
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
612 uint64_t fileOffset) ORTHANC_OVERRIDE
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
613 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
614 if (tag == DICOM_TAG_PIXEL_DATA)
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
615 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
616 hasPixelData_ = true;
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
617 pixelDataOffset_ = fileOffset;
5324
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
618
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
619 if (transferSyntax_ == DicomTransferSyntax_LittleEndianImplicit)
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
620 {
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
621 // Implicit Little Endian has always "OW" VR for pixel data
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
622 // https://dicom.nema.org/medical/dicom/current/output/chtml/part05/chapter_A.html
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
623 pixelDataVR_ = ValueRepresentation_OtherWord;
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
624 }
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
625 else if (transferSyntax_ == DicomTransferSyntax_LittleEndianExplicit ||
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
626 transferSyntax_ == DicomTransferSyntax_BigEndianExplicit)
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
627 {
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
628 pixelDataVR_ = vr;
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
629 }
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
630 else
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
631 {
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
632 // Compressed transfer syntaxes must always be OB
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
633 pixelDataVR_ = ValueRepresentation_OtherByte;
e95caa87fed8 only store PixelDataVR metadata if needed
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5316
diff changeset
634 }
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
635 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
636
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
637 // Stop processing once pixel data has been passed
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
638 return (tag < DICOM_TAG_PIXEL_DATA);
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
639 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
640
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
641 bool HasPixelData() const
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
642 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
643 return hasPixelData_;
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
644 }
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
645
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
646 uint64_t GetPixelDataOffset() const
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
647 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
648 return pixelDataOffset_;
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
649 }
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
650
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
651 ValueRepresentation GetPixelDataVR() const
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
652 {
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
653 return pixelDataVR_;
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
654 }
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
655
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
656 static bool LookupPixelDataOffset(uint64_t& offset,
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
657 ValueRepresentation& vr,
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
658 std::istream& stream)
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
659 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
660 PixelDataVisitor visitor;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
661 bool isLittleEndian;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
662
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
663 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
664 DicomStreamReader reader(stream);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
665
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
666 try
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
667 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
668 reader.Consume(visitor);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
669 isLittleEndian = reader.IsLittleEndian();
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
670 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
671 catch (OrthancException& e)
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
672 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
673 // Invalid DICOM file
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
674 return false;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
675 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
676 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
677
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
678 if (visitor.HasPixelData())
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
679 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
680 // Sanity check if we face an unsupported DICOM file: Make
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
681 // sure that we can read DICOM_TAG_PIXEL_DATA at the reported
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
682 // position in the stream
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
683 stream.seekg(visitor.GetPixelDataOffset(), stream.beg);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
684
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
685 std::string s;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
686 s.resize(4);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
687 stream.read(&s[0], s.size());
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
688
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
689 if (!isLittleEndian)
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
690 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
691 // Byte swapping if reading a file whose transfer syntax is
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
692 // 1.2.840.10008.1.2.2 (big endian explicit)
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
693 std::swap(s[0], s[1]);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
694 std::swap(s[2], s[3]);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
695 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
696
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
697 if (stream.gcount() == static_cast<std::streamsize>(s.size()) &&
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
698 s[0] == char(0xe0) &&
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
699 s[1] == char(0x7f) &&
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
700 s[2] == char(0x10) &&
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
701 s[3] == char(0x00))
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
702 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
703 offset = visitor.GetPixelDataOffset();
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
704 vr = visitor.GetPixelDataVR();
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
705 return true;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
706 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
707 else
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
708 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
709 return false;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
710 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
711 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
712 else
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
713 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
714 return false;
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
715 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
716 }
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
717 };
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
718
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
719
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
720 bool DicomStreamReader::LookupPixelDataOffset(uint64_t& offset,
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
721 ValueRepresentation& vr,
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
722 const std::string& dicom)
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
723 {
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
724 std::stringstream stream(dicom);
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
725 return PixelDataVisitor::LookupPixelDataOffset(offset, vr, stream);
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
726 }
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
727
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
728
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
729 bool DicomStreamReader::LookupPixelDataOffset(uint64_t& offset,
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
730 ValueRepresentation& vr,
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
731 const void* buffer,
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
732 size_t size)
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
733 {
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
734 boost::iostreams::array_source source(reinterpret_cast<const char*>(buffer), size);
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
735 boost::iostreams::stream<boost::iostreams::array_source> stream(source);
5316
03501a258d9e added instance metadata "PixelDataVR"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5185
diff changeset
736 return PixelDataVisitor::LookupPixelDataOffset(offset, vr, stream);
4493
b57ca702a430 DicomStreamReader::LookupPixelDataOffset()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4437
diff changeset
737 }
4220
92a21efa5c96 reorganization of DicomStreamReader
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
738 }
4494
39192eb9b43d New metadata automatically computed at the instance level: "PixelDataOffset"
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 4493
diff changeset
739