int set_date(const ExifData& exif, char date[])
{
const ExifData::const_iterator end = exif.end();
ExifData::const_iterator value = exif.findKey(ExifDateTimeCreated);
if(value == end)
value = exif.findKey(ExifDateTimeDigitized);
if(value == end)
return 1;
const std::string dateTime = value->value().toString();
if(!dateTime.empty())
{
//*date = (char*)realloc(*date, (dateTime.length() + 1) * sizeof(char));
strcpy(date, const_cast<char*>(dateTime.c_str()));
// format gets returned as 'YYYY:MM:DD HH:MM:SS' when it
// needs to be 'YYYY-MM-DDTHH:MM:SS' so fix separators
char* dateStr = date;
if(dateTime.length() > 4 && dateStr[4] != '-')
dateStr[4] = '-';
if(dateTime.length() > 6 && dateStr[7] != '-')
dateStr[7] = '-';
if(dateTime.length() > 10 && dateStr[10] != 'T')
dateStr[10] = 'T';
}
return 0;
}
int set_long_value(const ExifData& exif, const ExifKey& key, unsigned int& field)
{
const ExifData::const_iterator end = exif.end();
const ExifData::const_iterator value = exif.findKey(key);
if(value == end)
return -1;
field = value->value().toLong();
return 0;
}
WriteMethod ExifParser::encode(
Blob& blob,
const byte* pData,
uint32_t size,
ByteOrder byteOrder,
const ExifData& exifData
)
{
ExifData ed = exifData;
// Delete IFD0 tags that are "not recorded" in compressed images
// Reference: Exif 2.2 specs, 4.6.8 Tag Support Levels, section A
static const char* filteredIfd0Tags[] = {
"Exif.Image.PhotometricInterpretation",
"Exif.Image.StripOffsets",
"Exif.Image.RowsPerStrip",
"Exif.Image.StripByteCounts",
"Exif.Image.JPEGInterchangeFormat",
"Exif.Image.JPEGInterchangeFormatLength",
"Exif.Image.SubIFDs"
};
for (unsigned int i = 0; i < EXV_COUNTOF(filteredIfd0Tags); ++i) {
ExifData::iterator pos = ed.findKey(ExifKey(filteredIfd0Tags[i]));
if (pos != ed.end()) {
#ifdef DEBUG
std::cerr << "Warning: Exif tag " << pos->key() << " not encoded\n";
#endif
ed.erase(pos);
}
}
// Delete IFDs which do not occur in JPEGs
static const IfdId filteredIfds[] = {
subImage1Id,
subImage2Id,
subImage3Id,
subImage4Id,
subImage5Id,
subImage6Id,
subImage7Id,
subImage8Id,
subImage9Id,
subThumb1Id,
panaRawId,
ifd2Id,
ifd3Id
};
for (unsigned int i = 0; i < EXV_COUNTOF(filteredIfds); ++i) {
#ifdef DEBUG
std::cerr << "Warning: Exif IFD " << filteredIfds[i] << " not encoded\n";
#endif
eraseIfd(ed, filteredIfds[i]);
}
// IPTC and XMP are stored elsewhere, not in the Exif APP1 segment.
IptcData emptyIptc;
XmpData emptyXmp;
// Encode and check if the result fits into a JPEG Exif APP1 segment
MemIo mio1;
std::auto_ptr<TiffHeaderBase> header(new TiffHeader(byteOrder, 0x00000008, false));
WriteMethod wm = TiffParserWorker::encode(mio1,
pData,
size,
ed,
emptyIptc,
emptyXmp,
Tag::root,
TiffMapping::findEncoder,
header.get(),
0);
if (mio1.size() <= 65527) {
append(blob, mio1.mmap(), mio1.size());
return wm;
}
// If it doesn't fit, remove additional tags
// Delete preview tags if the preview is larger than 32kB.
// Todo: Enhance preview classes to be able to write and delete previews and use that instead.
// Table must be sorted by preview, the first tag in each group is the size
static const PreviewTags filteredPvTags[] = {
{ pttLen, "Exif.Minolta.ThumbnailLength" },
{ pttTag, "Exif.Minolta.ThumbnailOffset" },
{ pttLen, "Exif.Minolta.Thumbnail" },
{ pttLen, "Exif.NikonPreview.JPEGInterchangeFormatLength" },
{ pttIfd, "NikonPreview" },
{ pttLen, "Exif.Olympus.ThumbnailLength" },
{ pttTag, "Exif.Olympus.ThumbnailOffset" },
{ pttLen, "Exif.Olympus.ThumbnailImage" },
{ pttLen, "Exif.Olympus.Thumbnail" },
{ pttLen, "Exif.Olympus2.ThumbnailLength" },
{ pttTag, "Exif.Olympus2.ThumbnailOffset" },
{ pttLen, "Exif.Olympus2.ThumbnailImage" },
{ pttLen, "Exif.Olympus2.Thumbnail" },
{ pttLen, "Exif.OlympusCs.PreviewImageLength" },
{ pttTag, "Exif.OlympusCs.PreviewImageStart" },
{ pttTag, "Exif.OlympusCs.PreviewImageValid" },
{ pttLen, "Exif.Pentax.PreviewLength" },
{ pttTag, "Exif.Pentax.PreviewOffset" },
{ pttTag, "Exif.Pentax.PreviewResolution" },
{ pttLen, "Exif.PentaxDng.PreviewLength" },
{ pttTag, "Exif.PentaxDng.PreviewOffset" },
{ pttTag, "Exif.PentaxDng.PreviewResolution" },
{ pttLen, "Exif.SamsungPreview.JPEGInterchangeFormatLength" },
{ pttIfd, "SamsungPreview" },
{ pttLen, "Exif.Thumbnail.StripByteCounts" },
{ pttIfd, "Thumbnail" },
{ pttLen, "Exif.Thumbnail.JPEGInterchangeFormatLength" },
{ pttIfd, "Thumbnail" }
};
bool delTags = false;
ExifData::iterator pos;
for (unsigned int i = 0; i < EXV_COUNTOF(filteredPvTags); ++i) {
switch (filteredPvTags[i].ptt_) {
case pttLen:
delTags = false;
pos = ed.findKey(ExifKey(filteredPvTags[i].key_));
if (pos != ed.end() && sumToLong(*pos) > 32768) {
delTags = true;
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Exif tag " << pos->key() << " not encoded\n";
#endif
ed.erase(pos);
}
break;
case pttTag:
if (delTags) {
pos = ed.findKey(ExifKey(filteredPvTags[i].key_));
if (pos != ed.end()) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Exif tag " << pos->key() << " not encoded\n";
#endif
ed.erase(pos);
}
}
break;
case pttIfd:
if (delTags) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Exif IFD " << filteredPvTags[i].key_ << " not encoded\n";
#endif
eraseIfd(ed, Internal::groupId(filteredPvTags[i].key_));
}
break;
}
}
// Delete unknown tags larger than 4kB and known tags larger than 40kB.
for (ExifData::iterator pos = ed.begin(); pos != ed.end(); ) {
if ( (pos->size() > 4096 && pos->tagName().substr(0, 2) == "0x")
|| pos->size() > 40960) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Exif tag " << pos->key() << " not encoded\n";
#endif
pos = ed.erase(pos);
}
else {
++pos;
}
}
// Encode the remaining Exif tags again, don't care if it fits this time
MemIo mio2;
wm = TiffParserWorker::encode(mio2,
pData,
size,
ed,
emptyIptc,
emptyXmp,
Tag::root,
TiffMapping::findEncoder,
header.get(),
0);
append(blob, mio2.mmap(), mio2.size());
#ifdef DEBUG
if (wm == wmIntrusive) {
std::cerr << "SIZE OF EXIF DATA IS " << std::dec << mio2.size() << " BYTES\n";
}
else {
std::cerr << "SIZE DOESN'T MATTER, NON-INTRUSIVE WRITING USED\n";
}
#endif
return wm;
} // ExifParser::encode
void Exiv2Lib::setWhiteBalanceCoeffsCanon(ExifData& data, float wb[3])
{
ExifData::const_iterator pos;
if (*mExifInfo.model == "Canon EOS 300D DIGITAL" ||
*mExifInfo.model == "Canon EOS DIGITAL REBEL")
{
pos = data.findKey(ExifKey("Exif.Canon.WhiteBalanceTable"));
if (pos != data.end())
{
qDebug() << "Reading EOS 300D tags";
uint16_t* cdata = new uint16_t[pos->size() / 2];
pos->copy((unsigned char*)cdata, littleEndian);
wb[0] = cdata[1];
wb[1] = (cdata[2] + cdata[3]) / 2;
wb[2] = cdata[4];
float mx = max3(wb[0], wb[1], wb[2]);
wb[0] /= mx;
wb[1] /= mx;
wb[2] /= mx;
delete [] cdata;
return;
}
}
pos = data.findKey(ExifKey("Exif.Canon.ColorData"));
if (pos != data.end())
{
uint8_t* cdata = new uint8_t[pos->size()];
struct Canon_ColorData* colorData;
pos->copy(cdata, littleEndian);
colorData = (struct Canon_ColorData*)cdata;
if (*mExifInfo.model == "Canon EOS 350D DIGITAL") // || EOS 20D
{
// optimize with bitshifts later
// wb[0] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[2];
// wb[1] = ((colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[1]+colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[3])/2);
// wb[2] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[0];
wb[0] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[0];
wb[1] =
((colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[1] +
colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[2]) / 2);
wb[2] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[3];
qDebug() << "WB EOS 350D DIGITAL RGGB" << wb[0] << "," << wb[1] <<
"," << wb[2];
}
else if (*mExifInfo.model == "Canon EOS 1D Mark II") // || 1Ds Mark II
{
qDebug() << "Whitebalance info unavailable";
}
else if (*mExifInfo.model == "Canon G10")
{
qDebug() << "Whitebalance info unavailable";
}
else if (*mExifInfo.model == "Canon PowerShot S30")
{
wb[0] = colorData->V5.WhiteBalanceTable[WB_AsShot].GRBG[1];
wb[1] =
(colorData->V5.WhiteBalanceTable[WB_AsShot].GRBG[0] +
colorData->V5.WhiteBalanceTable[WB_AsShot].GRBG[3]) / 2;
wb[2] = colorData->V5.WhiteBalanceTable[WB_AsShot].GRBG[2];
}
else if (*mExifInfo.model == "Canon PowerShot S110")
{
wb[0] = colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[0];
wb[1] = (colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[1] +
colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[2]) / 2;
wb[2] = colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[3];
}
else // attempt to read at the default position at V4
{
qDebug() <<
"Model unknown, Parsing whitebalance using canon default format";
qDebug() << "Color data version: " << colorData->V7.version;
// optimize with bitshifs later
wb[0] = colorData->V7.WhiteBalanceTable[WB_AsShot].RGGB[0];
wb[1] =
(colorData->V7.WhiteBalanceTable[WB_AsShot].RGGB[1] +
colorData->V7.WhiteBalanceTable[WB_AsShot].RGGB[2]) / 2;
wb[2] = colorData->V7.WhiteBalanceTable[WB_AsShot].RGGB[3];
}
float mx = max3(wb[0], wb[1], wb[2]);
wb[0] /= mx;
wb[1] /= mx;
wb[2] /= mx;
delete [] cdata;
}
else
{
//qDebug() << "no such exif key";
wb[0] = 1.0;
wb[1] = 1.0;
wb[2] = 1.0;
}
// qDebug() << "WB RGGB Multipliers" <<wb[0] <<","<<wb[1]<<","<<wb[2];
}
void Exiv2Lib::setWhiteBalanceCoeffsNikon(ExifData& data, float wb[3])
{
ExifData::const_iterator pos;
/*
* This seems to be unnecessary as the multipliers are also
* available as rational numbers in the WB_RBLevels tag
*/
/*
pos = data.findKey(ExifKey("Exif.Nikon3.Version"));
int makerNoteVersion = -1;
if (pos != data.end())
{
char* buf = new char[pos->size()];
pos->copy((unsigned char*)buf, littleEndian);
QString val(buf);
qDebug() << val;
delete [] buf;
makerNoteVersion = val.toInt();
}
qDebug() << "Nikon makenote version:" << makerNoteVersion;
if (makerNoteVersion >= 200)
{
qDebug() << "Decrypt Nikon Color Balance";
}
*/
pos = data.findKey(ExifKey("Exif.Nikon3.WB_RBLevels"));
if (pos != data.end())
{
if (*mExifInfo.model == "NIKON D300")
{
wb[0] = 1.0f;
wb[1] = 1.0f;
wb[2] = 1.0f;
// wb[0] = colorData->V3.WhiteBalanceTable[WB_AsShot].RGGB[0];
// wb[1] =
// ((colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[1] +
// colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[2]) / 2);
// wb[2] = colorData->V1.WhiteBalanceTable[WB_AsShot].RGGB[3];
qDebug() << "White balance for model Nikon D300";
if (pos != data.end())
{
wb[0] = pos->toFloat(0);
wb[1] = 1.0f;
wb[2] = pos->toFloat(1);
qDebug() << "Nikon: RGB" << wb[0] << "," << wb[1] << "," <<
wb[2];
}
}
float mx = max3(wb[0], wb[1], wb[2]);
wb[0] /= mx;
wb[1] /= mx;
wb[2] /= mx;
}
else
{
qDebug () << "Nikon: Color balance data not available";
wb[0] = 1.0f;
wb[1] = 1.0f;
wb[2] = 1.0f;
}
}