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easyaccess.cpp
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// ***************************************************************** -*- C++ -*-
/*
* Copyright (C) 2004-2018 Exiv2 authors
* This program is part of the Exiv2 distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
*/
/*
File: easyaccess.cpp
*/
// *****************************************************************************
// included header files
#include "easyaccess.hpp"
// *****************************************************************************
namespace {
using namespace Exiv2;
/*!
@brief Search \em ed for a Metadatum specified by the \em keys.
The \em keys are searched in the order of their appearance, the
first available Metadatum is returned.
@param ed The %Exif metadata container to search
@param keys Array of keys to look for
@param count Number of elements in the array
*/
ExifData::const_iterator findMetadatum(const ExifData& ed,
const char* keys[],
int count)
{
for (int i = 0; i < count; ++i) {
ExifData::const_iterator pos = ed.findKey(ExifKey(keys[i]));
if (pos != ed.end()) return pos;
}
return ed.end();
} // findMetadatum
} // anonymous namespace
// *****************************************************************************
// class member definitions
namespace Exiv2 {
ExifData::const_iterator orientation(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Image.Orientation",
"Exif.Panasonic.Rotation",
"Exif.MinoltaCs5D.Rotation",
"Exif.MinoltaCs5D.Rotation2",
"Exif.MinoltaCs7D.Rotation",
"Exif.Sony1MltCsA100.Rotation",
"Exif.Sony1Cs.Rotation",
"Exif.Sony2Cs.Rotation",
"Exif.Sony1Cs2.Rotation",
"Exif.Sony2Cs2.Rotation",
"Exif.Sony1MltCsA100.Rotation"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator isoSpeed(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.ISOSpeedRatings",
"Exif.Image.ISOSpeedRatings",
"Exif.CanonSi.ISOSpeed",
"Exif.CanonCs.ISOSpeed",
"Exif.Nikon1.ISOSpeed",
"Exif.Nikon2.ISOSpeed",
"Exif.Nikon3.ISOSpeed",
"Exif.NikonIi.ISO",
"Exif.NikonIi.ISO2",
"Exif.MinoltaCsNew.ISOSetting",
"Exif.MinoltaCsOld.ISOSetting",
"Exif.MinoltaCs5D.ISOSpeed",
"Exif.MinoltaCs7D.ISOSpeed",
"Exif.Sony1Cs.ISOSetting",
"Exif.Sony2Cs.ISOSetting",
"Exif.Sony1Cs2.ISOSetting",
"Exif.Sony2Cs2.ISOSetting",
"Exif.Sony1MltCsA100.ISOSetting",
"Exif.Pentax.ISO",
"Exif.PentaxDng.ISO",
"Exif.Olympus.ISOSpeed",
"Exif.Samsung2.ISO",
"Exif.Casio.ISO",
"Exif.Casio2.ISO",
"Exif.Casio2.ISOSpeed"
};
struct SensKeyNameList {
int count;
const char* keys[3];
};
// covers Exif.Phot.SensitivityType values 1-7. Note that SOS, REI and
// ISO do differ in their meaning. Values coming first in a list (and
// existing as a tag) are picked up first and used as the "ISO" value.
static const SensKeyNameList sensitivityKey[] = {
{ 1, { "Exif.Photo.StandardOutputSensitivity" }},
{ 1, { "Exif.Photo.RecommendedExposureIndex" }},
{ 1, { "Exif.Photo.ISOSpeed" }},
{ 2, { "Exif.Photo.RecommendedExposureIndex", "Exif.Photo.StandardOutputSensitivity" }},
{ 2, { "Exif.Photo.ISOSpeed", "Exif.Photo.StandardOutputSensitivity" }},
{ 2, { "Exif.Photo.ISOSpeed", "Exif.Photo.RecommendedExposureIndex" }},
{ 3, { "Exif.Photo.ISOSpeed", "Exif.Photo.RecommendedExposureIndex", "Exif.Photo.StandardOutputSensitivity" }}
};
static const char* sensitivityType[] = {
"Exif.Photo.SensitivityType"
};
// Find the first ISO value which is not "0"
const int cnt = EXV_COUNTOF(keys);
ExifData::const_iterator md = ed.end();
long iso_val = -1;
for (int idx = 0; idx < cnt; ) {
md = findMetadatum(ed, keys + idx, cnt - idx);
if (md == ed.end()) break;
std::ostringstream os;
md->write(os, &ed);
bool ok = false;
iso_val = parseLong(os.str(), ok);
if (ok && iso_val > 0) break;
while (strcmp(keys[idx++], md->key().c_str()) != 0 && idx < cnt) {}
md = ed.end();
}
// there is either a possible ISO "overflow" or no legacy
// ISO tag at all. Check for SensitivityType tag and the referenced
// ISO value (see EXIF 2.3 Annex G)
long iso_tmp_val = -1;
while (iso_tmp_val == -1 && (iso_val == 65535 || md == ed.end())) {
ExifData::const_iterator md_st = findMetadatum(ed, sensitivityType, 1);
// no SensitivityType? exit with existing data
if (md_st == ed.end())
break;
// otherwise pick up actual value and grab value accordingly
std::ostringstream os;
md_st->write(os, &ed);
bool ok = false;
const long st_val = parseLong(os.str(), ok);
// SensivityType out of range or cannot be parsed properly
if (!ok || st_val < 1 || st_val > 7)
break;
// pick up list of ISO tags, and check for at least one of
// them available.
const SensKeyNameList *sensKeys = &sensitivityKey[st_val - 1];
for (int idx = 0; idx < sensKeys->count; md_st = ed.end()) {
md_st = findMetadatum(ed, const_cast<const char**>(sensKeys->keys), sensKeys->count);
if (md_st == ed.end())
break;
std::ostringstream os_iso;
md_st->write(os_iso, &ed);
ok = false;
iso_tmp_val = parseLong(os_iso.str(), ok);
// something wrong with the value
if (ok || iso_tmp_val > 0) {
md = md_st;
break;
}
while (strcmp(sensKeys->keys[idx++], md_st->key().c_str()) != 0 && idx < sensKeys->count) {}
}
break;
}
return md;
}
ExifData::const_iterator flashBias(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonSi.FlashBias",
"Exif.Panasonic.FlashBias",
"Exif.Olympus.FlashBias",
"Exif.OlympusCs.FlashExposureComp",
"Exif.Minolta.FlashExposureComp",
"Exif.SonyMinolta.FlashExposureComp",
"Exif.Sony1.FlashExposureComp",
"Exif.Sony2.FlashExposureComp"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator exposureMode(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.ExposureProgram",
"Exif.Image.ExposureProgram",
"Exif.CanonCs.ExposureProgram",
"Exif.MinoltaCs7D.ExposureMode",
"Exif.MinoltaCs5D.ExposureMode",
"Exif.MinoltaCsNew.ExposureMode",
"Exif.MinoltaCsOld.ExposureMode",
"Exif.Sony1MltCsA100.ExposureMode",
"Exif.Sony1Cs.ExposureProgram",
"Exif.Sony2Cs.ExposureProgram",
"Exif.Sigma.ExposureMode"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator sceneMode(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonCs.EasyMode",
"Exif.Fujifilm.PictureMode",
"Exif.MinoltaCsNew.SubjectProgram",
"Exif.MinoltaCsOld.SubjectProgram",
"Exif.Minolta.SceneMode",
"Exif.SonyMinolta.SceneMode",
"Exif.Sony1.SceneMode",
"Exif.Sony2.SceneMode",
"Exif.OlympusCs.SceneMode",
"Exif.Panasonic.ShootingMode",
"Exif.Panasonic.SceneMode",
"Exif.Pentax.PictureMode",
"Exif.PentaxDng.PictureMode",
"Exif.Photo.SceneCaptureType"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator macroMode(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonCs.Macro",
"Exif.Fujifilm.Macro",
"Exif.Olympus.Macro",
"Exif.OlympusCs.MacroMode",
"Exif.Panasonic.Macro",
"Exif.MinoltaCsNew.MacroMode",
"Exif.MinoltaCsOld.MacroMode",
"Exif.Sony1.Macro",
"Exif.Sony2.Macro"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator imageQuality(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonCs.Quality",
"Exif.Fujifilm.Quality",
"Exif.Sigma.Quality",
"Exif.Nikon1.Quality",
"Exif.Nikon2.Quality",
"Exif.Nikon3.Quality",
"Exif.Olympus.Quality",
"Exif.OlympusCs.Quality",
"Exif.Panasonic.Quality",
"Exif.Minolta.Quality",
"Exif.MinoltaCsNew.Quality",
"Exif.MinoltaCsOld.Quality",
"Exif.MinoltaCs5D.Quality",
"Exif.MinoltaCs7D.Quality",
"Exif.Sony1MltCsA100.Quality",
"Exif.Sony1.JPEGQuality",
"Exif.Sony1.Quality",
"Exif.Sony1Cs.Quality",
"Exif.Sony2.JPEGQuality",
"Exif.Sony2.Quality",
"Exif.Sony2Cs.Quality",
"Exif.Casio.Quality",
"Exif.Casio2.QualityMode",
"Exif.Casio2.Quality"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator whiteBalance(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonSi.WhiteBalance",
"Exif.Fujifilm.WhiteBalance",
"Exif.Sigma.WhiteBalance",
"Exif.Nikon1.WhiteBalance",
"Exif.Nikon2.WhiteBalance",
"Exif.Nikon3.WhiteBalance",
"Exif.Olympus.WhiteBalance",
"Exif.OlympusCs.WhiteBalance",
"Exif.Panasonic.WhiteBalance",
"Exif.MinoltaCs5D.WhiteBalance",
"Exif.MinoltaCs7D.WhiteBalance",
"Exif.MinoltaCsNew.WhiteBalance",
"Exif.MinoltaCsOld.WhiteBalance",
"Exif.Minolta.WhiteBalance",
"Exif.Sony1MltCsA100.WhiteBalance",
"Exif.SonyMinolta.WhiteBalance",
"Exif.Sony1.WhiteBalance",
"Exif.Sony2.WhiteBalance",
"Exif.Sony1.WhiteBalance2",
"Exif.Sony2.WhiteBalance2",
"Exif.Casio.WhiteBalance",
"Exif.Casio2.WhiteBalance",
"Exif.Casio2.WhiteBalance2",
"Exif.Photo.WhiteBalance"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator lensName(const ExifData& ed)
{
static const char* keys[] = {
// Exif.Canon.LensModel only reports focal length.
// Try Exif.CanonCs.LensType first.
"Exif.CanonCs.LensType",
"Exif.Photo.LensModel",
"Exif.NikonLd1.LensIDNumber",
"Exif.NikonLd2.LensIDNumber",
"Exif.NikonLd3.LensIDNumber",
"Exif.Pentax.LensType",
"Exif.PentaxDng.LensType",
"Exif.Minolta.LensID",
"Exif.SonyMinolta.LensID",
"Exif.Sony1.LensID",
"Exif.Sony2.LensID",
"Exif.OlympusEq.LensType",
"Exif.Panasonic.LensType",
"Exif.Samsung2.LensType"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator saturation(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.Saturation",
"Exif.CanonCs.Saturation",
"Exif.MinoltaCsNew.Saturation",
"Exif.MinoltaCsOld.Saturation",
"Exif.MinoltaCs7D.Saturation",
"Exif.MinoltaCs5D.Saturation",
"Exif.Fujifilm.Color",
"Exif.Nikon3.Saturation",
"Exif.Panasonic.Saturation",
"Exif.Pentax.Saturation",
"Exif.PentaxDng.Saturation",
"Exif.Sigma.Saturation",
"Exif.Casio.Saturation",
"Exif.Casio2.Saturation",
"Exif.Casio2.Saturation2"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator sharpness(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.Sharpness",
"Exif.CanonCs.Sharpness",
"Exif.Fujifilm.Sharpness",
"Exif.MinoltaCsNew.Sharpness",
"Exif.MinoltaCsOld.Sharpness",
"Exif.MinoltaCs7D.Sharpness",
"Exif.MinoltaCs5D.Sharpness",
"Exif.Olympus.SharpnessFactor",
"Exif.Panasonic.Sharpness",
"Exif.Pentax.Sharpness",
"Exif.PentaxDng.Sharpness",
"Exif.Sigma.Sharpness",
"Exif.Casio.Sharpness",
"Exif.Casio2.Sharpness",
"Exif.Casio2.Sharpness2"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator contrast(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.Contrast",
"Exif.CanonCs.Contrast",
"Exif.Fujifilm.Tone",
"Exif.MinoltaCsNew.Contrast",
"Exif.MinoltaCsOld.Contrast",
"Exif.MinoltaCs7D.Contrast",
"Exif.MinoltaCs5D.Contrast",
"Exif.Olympus.Contrast",
"Exif.Panasonic.Contrast",
"Exif.Pentax.Contrast",
"Exif.PentaxDng.Contrast",
"Exif.Sigma.Contrast",
"Exif.Casio.Contrast",
"Exif.Casio2.Contrast",
"Exif.Casio2.Contrast2"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator sceneCaptureType(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.SceneCaptureType",
"Exif.Olympus.SpecialMode"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator meteringMode(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.MeteringMode",
"Exif.Image.MeteringMode",
"Exif.CanonCs.MeteringMode",
"Exif.Sony1MltCsA100.MeteringMode"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator make(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Image.Make"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator model(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Image.Model"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator exposureTime(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.ExposureTime",
"Exif.Image.ExposureTime",
"Exif.Samsung2.ExposureTime"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator fNumber(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.FNumber",
"Exif.Image.FNumber",
"Exif.Samsung2.FNumber"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator subjectDistance(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.SubjectDistance",
"Exif.Image.SubjectDistance",
"Exif.CanonSi.SubjectDistance",
"Exif.CanonFi.FocusDistanceUpper",
"Exif.CanonFi.FocusDistanceLower",
"Exif.MinoltaCsNew.FocusDistance",
"Exif.Nikon1.FocusDistance",
"Exif.Nikon3.FocusDistance",
"Exif.NikonLd2.FocusDistance",
"Exif.NikonLd3.FocusDistance",
"Exif.Olympus.FocusDistance",
"Exif.OlympusFi.FocusDistance",
"Exif.Casio.ObjectDistance",
"Exif.Casio2.ObjectDistance"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator serialNumber(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Image.CameraSerialNumber",
"Exif.Canon.SerialNumber",
"Exif.Nikon3.SerialNumber",
"Exif.Nikon3.SerialNO",
"Exif.Fujifilm.SerialNumber",
"Exif.Olympus.SerialNumber2",
"Exif.Sigma.SerialNumber"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator focalLength(const ExifData& ed)
{
static const char* keys[] = {
"Exif.Photo.FocalLength",
"Exif.Image.FocalLength",
"Exif.Canon.FocalLength",
"Exif.NikonLd2.FocalLength",
"Exif.NikonLd3.FocalLength",
"Exif.MinoltaCsNew.FocalLength",
"Exif.Pentax.FocalLength",
"Exif.PentaxDng.FocalLength",
"Exif.Casio2.FocalLength"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
ExifData::const_iterator afPoint(const ExifData& ed)
{
static const char* keys[] = {
"Exif.CanonPi.AFPointsUsed",
"Exif.CanonPi.AFPointsUsed20D",
"Exif.CanonSi.AFPointUsed",
"Exif.CanonCs.AFPoint",
"Exif.MinoltaCs7D.AFPoints",
"Exif.Nikon1.AFFocusPos",
"Exif.NikonAf.AFPoint",
"Exif.NikonAf.AFPointsInFocus",
"Exif.NikonAf2.AFPointsUsed",
"Exif.NikonAf2.PrimaryAFPoint",
"Exif.OlympusFi.AFPoint",
"Exif.Pentax.AFPoint",
"Exif.Pentax.AFPointInFocus",
"Exif.PentaxDng.AFPoint",
"Exif.PentaxDng.AFPointInFocus",
"Exif.Sony1Cs.LocalAFAreaPoint",
"Exif.Sony2Cs.LocalAFAreaPoint",
"Exif.Sony1Cs2.LocalAFAreaPoint",
"Exif.Sony2Cs2.LocalAFAreaPoint",
"Exif.Sony1MltCsA100.LocalAFAreaPoint",
"Exif.Casio.AFPoint",
"Exif.Casio2.AFPointPosition"
};
return findMetadatum(ed, keys, EXV_COUNTOF(keys));
}
} // namespace Exiv2