KFileMetaData

exiv2extractor.cpp
1/*
2 SPDX-FileCopyrightText: 2012 Vishesh Handa <me@vhanda.in>
3
4 SPDX-License-Identifier: LGPL-2.1-or-later
5*/
6
7
8#include "datetimeparser_p.h"
9#include "exiv2extractor.h"
10#include <QTimeZone>
11#include <cmath>
12#include <exiv2/exiv2.hpp>
13
14using namespace KFileMetaData;
15
16namespace {
17void add(ExtractionResult* result, const Exiv2::ExifData& data,
18 Property::Property prop, const Exiv2::ExifKey& key,
19 QMetaType::Type type);
20
21double fetchGpsDouble(const Exiv2::ExifData& data, const Exiv2::ExifKey& key);
22double fetchGpsAltitude(const Exiv2::ExifData& data);
23QByteArray fetchByteArray(const Exiv2::ExifData& data, const Exiv2::ExifKey& key);
24}
25
26Exiv2Extractor::Exiv2Extractor(QObject* parent)
27 : ExtractorPlugin(parent)
28{
29#ifdef EXV_ENABLE_BMFF
30#if !(EXIV2_TEST_VERSION(0, 28, 3))
31// Enabled by default since 0.28.3 when Exiv2 was built with BMFF support
32 Exiv2::enableBMFF(true);
33#endif
34#endif
35}
36
37namespace
38{
39static const QStringList supportedMimeTypes = {
40 QStringLiteral("image/bmp"),
41 QStringLiteral("image/gif"),
42 QStringLiteral("image/jp2"),
43 QStringLiteral("image/jpeg"),
44 QStringLiteral("image/pgf"),
45 QStringLiteral("image/png"),
46 QStringLiteral("image/tiff"),
47 QStringLiteral("image/webp"),
48#ifdef EXV_ENABLE_BMFF
49 QStringLiteral("image/avif"),
50 QStringLiteral("image/heif"),
51 QStringLiteral("image/jxl"),
52 QStringLiteral("image/x-canon-cr3"),
53#endif
54 QStringLiteral("image/x-exv"),
55 QStringLiteral("image/x-canon-cr2"),
56 QStringLiteral("image/x-canon-crw"),
57 QStringLiteral("image/x-fuji-raf"),
58 QStringLiteral("image/x-minolta-mrw"),
59 QStringLiteral("image/x-nikon-nef"),
60 QStringLiteral("image/x-olympus-orf"),
61 QStringLiteral("image/x-panasonic-rw2"),
62 QStringLiteral("image/x-pentax-pef"),
63 QStringLiteral("image/x-photoshop"),
64 QStringLiteral("image/x-samsung-srw"),
65 QStringLiteral("image/x-tga"),
66};
67
68QString toString(const Exiv2::Value& value)
69{
70 const std::string str = value.toString();
71 return QString::fromUtf8(str.c_str(), str.length());
72}
73
74QVariant toVariantDateTime(const Exiv2::Value& value)
75{
76 if (value.typeId() == Exiv2::asciiString) {
77 QDateTime val = Parser::dateTimeFromString(QString::fromStdString(value.toString()));
78 if (val.isValid()) {
79 // Datetime is stored in exif as local time.
80 val.setTimeZone(QTimeZone::fromSecondsAheadOfUtc(0));
81 return QVariant(val);
82 }
83 }
84
85 return QVariant();
86}
87
88QVariant toVariantLong(const Exiv2::Value& value)
89{
90 if (value.typeId() == Exiv2::unsignedLong || value.typeId() == Exiv2::signedLong) {
91#if EXIV2_TEST_VERSION(0,28,0)
92 qlonglong val = value.toInt64();
93#else
94 qlonglong val = value.toLong();
95#endif
96 return QVariant(val);
97 }
98
99 QString str(toString(value));
100 bool ok = false;
101 int val = str.toInt(&ok);
102 if (ok) {
103 return QVariant(val);
104 }
105
106 return QVariant();
107}
108
109QVariant toVariantDouble(const Exiv2::Value& value)
110{
111 if (value.typeId() == Exiv2::tiffFloat || value.typeId() == Exiv2::tiffDouble
112 || value.typeId() == Exiv2::unsignedRational || value.typeId() == Exiv2::signedRational) {
113 return QVariant(static_cast<double>(value.toFloat()));
114 }
115
116 QString str(toString(value));
117 bool ok = false;
118 double val = str.toDouble(&ok);
119 if (ok) {
120 return QVariant(val);
121 }
122
123 return QVariant();
124}
125
126QVariant toVariantString(const Exiv2::Value& value)
127{
128 QString str = toString(value);
129 if (!str.isEmpty()) {
130 return QVariant(str);
131 }
132
133 return QVariant();
134}
135
136QVariant toVariant(const Exiv2::Value& value, QMetaType::Type type) {
137 if (value.count() == 0) {
138 return QVariant();
139 }
140 switch (type) {
141 case QMetaType::Int:
142 return toVariantLong(value);
143
144 case QMetaType::QDateTime:
145 return toVariantDateTime(value);
146
147 case QMetaType::Double:
148 return toVariantDouble(value);
149
150 case QMetaType::QString:
151 default:
152 return toVariantString(value);
153 }
154}
155}
156
157QStringList Exiv2Extractor::mimetypes() const
158{
159 return supportedMimeTypes;
160}
161
162void Exiv2Extractor::extract(ExtractionResult* result)
163{
164 using namespace std::string_literals;
165
166 QByteArray arr = result->inputUrl().toUtf8();
167 std::string fileString(arr.data(), arr.length());
168
169#if EXIV2_TEST_VERSION(0, 28, 0)
170 Exiv2::Image::UniquePtr image;
171#else
172 Exiv2::Image::AutoPtr image;
173#endif
174 try {
175 image = Exiv2::ImageFactory::open(fileString);
176 } catch (const std::exception&) {
177 return;
178 }
179 if (!image.get()) {
180 return;
181 }
182
183 try {
184 image->readMetadata();
185 } catch (const std::exception&) {
186 return;
187 }
188 result->addType(Type::Image);
189
190 if (!(result->inputFlags() & ExtractionResult::ExtractMetaData)) {
191 return;
192 }
193
194 if (image->pixelHeight()) {
195 result->add(Property::Height, image->pixelHeight());
196 }
197
198 if (image->pixelWidth()) {
199 result->add(Property::Width, image->pixelWidth());
200 }
201
202 std::string comment = image->comment();
203 if (!comment.empty()) {
204 result->add(Property::Comment, QString::fromUtf8(comment.c_str(), comment.length()));
205 }
206
207 const Exiv2::ExifData& data = image->exifData();
208
209 using EK = Exiv2::ExifKey;
210 add(result, data, Property::Manufacturer, EK{"Exif.Image.Make"s}, QMetaType::QString);
211 add(result, data, Property::Model, EK{"Exif.Image.Model"s}, QMetaType::QString);
212 add(result, data, Property::Description, EK{"Exif.Image.ImageDescription"s}, QMetaType::QString);
213 add(result, data, Property::Artist, EK{"Exif.Image.Artist"s}, QMetaType::QString);
214 add(result, data, Property::Copyright, EK{"Exif.Image.Copyright"s}, QMetaType::QString);
215 add(result, data, Property::Generator, EK{"Exif.Image.Software"s}, QMetaType::QString);
216 add(result, data, Property::ImageDateTime, EK{"Exif.Image.DateTime"s}, QMetaType::QDateTime);
217 add(result, data, Property::ImageOrientation, EK{"Exif.Image.Orientation"s}, QMetaType::Int);
218 add(result, data, Property::PhotoFlash, EK{"Exif.Photo.Flash"s}, QMetaType::Int);
219 add(result, data, Property::PhotoPixelXDimension, EK{"Exif.Photo.PixelXDimension"s}, QMetaType::Int);
220 add(result, data, Property::PhotoPixelYDimension, EK{"Exif.Photo.PixelYDimension"s}, QMetaType::Int);
221 add(result, data, Property::PhotoDateTimeOriginal, EK{"Exif.Photo.DateTimeOriginal"s}, QMetaType::QDateTime);
222 add(result, data, Property::PhotoFocalLength, EK{"Exif.Photo.FocalLength"s}, QMetaType::Double);
223 add(result, data, Property::PhotoFocalLengthIn35mmFilm, EK{"Exif.Photo.FocalLengthIn35mmFilm"s}, QMetaType::Double);
224 add(result, data, Property::PhotoExposureTime, EK{"Exif.Photo.ExposureTime"s}, QMetaType::Double);
225 add(result, data, Property::PhotoExposureBiasValue, EK{"Exif.Photo.ExposureBiasValue"s}, QMetaType::Double);
226 add(result, data, Property::PhotoFNumber, EK{"Exif.Photo.FNumber"s}, QMetaType::Double);
227 add(result, data, Property::PhotoApertureValue, EK{"Exif.Photo.ApertureValue"s}, QMetaType::Double);
228 add(result, data, Property::PhotoWhiteBalance, EK{"Exif.Photo.WhiteBalance"s}, QMetaType::Int);
229 add(result, data, Property::PhotoMeteringMode, EK{"Exif.Photo.MeteringMode"s}, QMetaType::Int);
230 add(result, data, Property::PhotoISOSpeedRatings, EK{"Exif.Photo.ISOSpeedRatings"s}, QMetaType::Int);
231 add(result, data, Property::PhotoSaturation, EK{"Exif.Photo.Saturation"s}, QMetaType::Int);
232 add(result, data, Property::PhotoSharpness, EK{"Exif.Photo.Sharpness"s}, QMetaType::Int);
233 // https://exiv2.org/tags.html "Exif.Photo.ImageTitle" not natively supported, use tag value
234 add(result, data, Property::Title, EK{0xa436, "Photo"s}, QMetaType::QString);
235
236 double latitude = fetchGpsDouble(data, EK{"Exif.GPSInfo.GPSLatitude"s});
237 double longitude = fetchGpsDouble(data, EK{"Exif.GPSInfo.GPSLongitude"s});
238 double altitude = fetchGpsAltitude(data);
239
240 QByteArray latRef = fetchByteArray(data, EK{"Exif.GPSInfo.GPSLatitudeRef"s});
241 if (!latRef.isEmpty() && latRef[0] == 'S') {
242 latitude *= -1;
243 }
244
245 QByteArray longRef = fetchByteArray(data, EK{"Exif.GPSInfo.GPSLongitudeRef"s});
246 if (!longRef.isEmpty() && longRef[0] == 'W') {
247 longitude *= -1;
248 }
249
250 if (!std::isnan(latitude)) {
251 result->add(Property::PhotoGpsLatitude, latitude);
252 }
253
254 if (!std::isnan(longitude)) {
255 result->add(Property::PhotoGpsLongitude, longitude);
256 }
257
258 if (!std::isnan(altitude)) {
259 result->add(Property::PhotoGpsAltitude, altitude);
260 }
261
262 const Exiv2::XmpData& xmpData = image->xmpData();
263 for (const auto& entry : xmpData) {
264 if (entry.groupName() != "dc"s) {
265 continue;
266 }
267
268 std::map<std::string, Property::Property> propMap = {
269 { "subject"s, Property::Subject },
270 { "title"s, Property::Title},
271 { "description"s, Property::Description},
272 };
273 if (auto type = propMap.find(entry.tagName()); type != propMap.end()) {
274 auto xmpType = Exiv2::XmpValue::xmpArrayType(entry.value().typeId());
275 size_t limit = ((xmpType == Exiv2::XmpValue::xaBag) || (xmpType == Exiv2::XmpValue::xaSeq)) ? entry.count() : 1;
276 for (size_t i = 0; i < limit; i++) {
277 auto value = QString::fromStdString(entry.toString(i));
278 if (!value.isEmpty()) {
279 result->add(type->second, value);
280 }
281 }
282 }
283 }
284}
285
286namespace {
287void add(ExtractionResult* result, const Exiv2::ExifData& data,
288 Property::Property prop, const Exiv2::ExifKey& key,
289 QMetaType::Type type)
290{
291 Exiv2::ExifData::const_iterator it = data.findKey(key);
292 if (it != data.end()) {
293 QVariant value = toVariant(it->value(), type);
294 if (!value.isNull()) {
295 result->add(prop, value);
296 }
297 }
298}
299
300double fetchGpsDouble(const Exiv2::ExifData& data, const Exiv2::ExifKey& key)
301{
302 Exiv2::ExifData::const_iterator it = data.findKey(key);
303 if (it != data.end() && it->count() == 3) {
304 double n = 0.0;
305 double d = 0.0;
306
307 n = (*it).toRational(0).first;
308 d = (*it).toRational(0).second;
309
310 if (d == 0.0) {
311 return std::numeric_limits<double>::quiet_NaN();
312 }
313
314 double deg = n / d;
315
316 n = (*it).toRational(1).first;
317 d = (*it).toRational(1).second;
318
319 if (d == 0.0) {
320 return deg;
321 }
322
323 double min = n / d;
324 if (min != -1.0) {
325 deg += min / 60.0;
326 }
327
328 n = (*it).toRational(2).first;
329 d = (*it).toRational(2).second;
330
331 if (d == 0.0) {
332 return deg;
333 }
334
335 double sec = n / d;
336 if (sec != -1.0) {
337 deg += sec / 3600.0;
338 }
339
340 return deg;
341 }
342
343 return std::numeric_limits<double>::quiet_NaN();
344}
345
346double fetchGpsAltitude(const Exiv2::ExifData& data)
347{
348 using namespace std::string_literals;
349
350 double alt = std::numeric_limits<double>::quiet_NaN();
351 Exiv2::ExifData::const_iterator it = data.findKey(Exiv2::ExifKey("Exif.GPSInfo.GPSAltitude"s));
352 if (it != data.end() && it->count() > 0 &&
353 (it->value().typeId() == Exiv2::unsignedRational || it->value().typeId() == Exiv2::signedRational)) {
354 auto ratio = it->value().toRational();
355 if (ratio.second == 0) {
356 return alt;
357 }
358 it = data.findKey(Exiv2::ExifKey("Exif.GPSInfo.GPSAltitudeRef"s));
359 if (it != data.end() && it->count() > 0 &&
360 (it->value().typeId() == Exiv2::unsignedByte || it->value().typeId() == Exiv2::signedByte)) {
361#if EXIV2_TEST_VERSION(0,28,0)
362 auto altRef = it->value().toInt64();
363#else
364 auto altRef = it->value().toLong();
365#endif
366 if (altRef) {
367 alt = -1.0 * ratio.first / ratio.second;
368 } else {
369 alt = 1.0 * ratio.first / ratio.second;
370 }
371 }
372 }
373 return alt;
374}
375QByteArray fetchByteArray(const Exiv2::ExifData& data, const Exiv2::ExifKey& key)
376{
377 Exiv2::ExifData::const_iterator it = data.findKey(key);
378 if (it != data.end() && it->count() > 0) {
379 std::string str = it->value().toString();
380 return QByteArray(str.c_str(), str.size());
381 }
382
383 return QByteArray();
384}
385} // <anonymous> namespace
386
387#include "moc_exiv2extractor.cpp"
KFileMetaData::ExtractionResult
The ExtractionResult class is where all the data extracted by the indexer is saved.
Definition extractionresult.h:37
KFileMetaData::ExtractionResult::inputUrl
QString inputUrl() const
The input URL which the plugins will use to locate the file.
Definition extractionresult.cpp:35
KFileMetaData::ExtractionResult::addType
virtual void addType(Type::Type type)=0
This function is called by the plugins.
KFileMetaData::ExtractionResult::add
virtual void add(Property::Property property, const QVariant &value)=0
This function is called by the plugins when they wish to add a key value pair which should be indexed...
KFileMetaData::ExtractionResult::inputFlags
Flags inputFlags() const
The flags which the extraction plugin should considering following when extracting metadata from the ...
Definition extractionresult.cpp:45
KFileMetaData::ExtractorPlugin
The ExtractorPlugin is the base class for all file metadata extractors.
Definition extractorplugin.h:55
Akonadi::Server::DbType::type
Type type(const QSqlDatabase &db)
Baloo::toString
char * toString(const EngineQuery &query)
KFileMetaData
The KFileMetaData namespace.
Definition embeddedimagedata.h:18
KStandardGuiItem::add
KGuiItem add()
QByteArray::data
char * data()
QByteArray::isEmpty
bool isEmpty() const const
QByteArray::length
qsizetype length() const const
QDateTime::isValid
bool isValid() const const
QDateTime::setTimeZone
void setTimeZone(const QTimeZone &toZone)
QString::fromStdString
QString fromStdString(const std::string &str)
QString::fromUtf8
QString fromUtf8(QByteArrayView str)
QString::isEmpty
bool isEmpty() const const
QString::toUtf8
QByteArray toUtf8() const const
QTimeZone::fromSecondsAheadOfUtc
QTimeZone fromSecondsAheadOfUtc(int offset)
QVariant::isNull
bool isNull() const const
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