void CrwMap::extract0x102a(const CiffComponent& ciffComponent,
const CrwMapInfo* crwMapInfo,
Image& image,
ByteOrder byteOrder)
{
if (ciffComponent.typeId() != unsignedShort) {
return extractBasic(ciffComponent, crwMapInfo, image, byteOrder);
}
long aperture = 0;
long shutterSpeed = 0;
std::string ifdItem(ExifTags::ifdItem(canonCs2IfdId));
uint16_t c = 1;
while (uint32_t(c)*2 < ciffComponent.size()) {
uint16_t n = 1;
ExifKey key(c, ifdItem);
UShortValue value;
value.read(ciffComponent.pData() + c*2, n*2, byteOrder);
image.exifData().add(key, &value);
if (c == 21) aperture = value.toLong();
if (c == 22) shutterSpeed = value.toLong();
c += n;
}
// Exif.Photo.FNumber
float f = fnumber(canonEv(aperture));
// Beware: primitive conversion algorithm
uint32_t den = 1000000;
uint32_t nom = static_cast<uint32_t>(f * den);
uint32_t g = gcd(nom, den);
URational ur(nom/g, den/g);
URationalValue fn;
fn.value_.push_back(ur);
image.exifData().add(ExifKey("Exif.Photo.FNumber"), &fn);
// Exif.Photo.ExposureTime
ur = exposureTime(canonEv(shutterSpeed));
URationalValue et;
et.value_.push_back(ur);
image.exifData().add(ExifKey("Exif.Photo.ExposureTime"), &et);
} // CrwMap::extract0x102a
void CrwDecoder::decodeMetaDataInternal(CameraMetaData *meta) {
int iso = 0;
mRaw->cfa.setCFA(iPoint2D(2,2), CFA_RED, CFA_GREEN, CFA_GREEN2, CFA_BLUE);
vector<CiffIFD*> data = mRootIFD->getIFDsWithTag(CIFF_MAKEMODEL);
if (data.empty())
ThrowRDE("CRW Support check: Model name not found");
vector<string> makemodel = data[0]->getEntry(CIFF_MAKEMODEL)->getStrings();
if (makemodel.size() < 2)
ThrowRDE("CRW Support check: wrong number of strings for make/model");
string make = makemodel[0];
string model = makemodel[1];
string mode = "";
if (mRootIFD->hasEntryRecursive(CIFF_SHOTINFO)) {
CiffEntry *shot_info = mRootIFD->getEntryRecursive(CIFF_SHOTINFO);
if (shot_info->type == CIFF_SHORT && shot_info->count >= 2) {
// os << exp(canonEv(value.toLong()) * log(2.0)) * 100.0 / 32.0;
ushort16 iso_index = shot_info->getShort(2);
iso = expf(canonEv((long)iso_index) * logf(2.0)) * 100.0f / 32.0f;
}
}
// Fetch the white balance
try {
if(mRootIFD->hasEntryRecursive((CiffTag)0x0032)) {
CiffEntry *wb = mRootIFD->getEntryRecursive((CiffTag)0x0032);
if (wb->type == CIFF_BYTE && wb->count == 768) {
// We're in a D30 file, values are RGGB
// This will probably not get used anyway as a 0x102c tag should exist
mRaw->metadata.wbCoeffs[0] = (float) (1024.0 /wb->getByte(72));
mRaw->metadata.wbCoeffs[1] = (float) ((1024.0/wb->getByte(73))+(1024.0/wb->getByte(74)))/2.0f;
mRaw->metadata.wbCoeffs[2] = (float) (1024.0 /wb->getByte(75));
} else if (wb->type == CIFF_BYTE && wb->count > 768) { // Other G series and S series cameras
// correct offset for most cameras
int offset = 120;
// check for the hint that we need to use other offset
if (hints.find("wb_offset") != hints.end()) {
stringstream wb_offset(hints.find("wb_offset")->second);
wb_offset >> offset;
}
ushort16 key[] = { 0x410, 0x45f3 };
if (hints.find("wb_mangle") == hints.end())
key[0] = key[1] = 0;
offset /= 2;
mRaw->metadata.wbCoeffs[0] = (float) (wb->getShort(offset+1) ^ key[1]);
mRaw->metadata.wbCoeffs[1] = (float) (wb->getShort(offset+0) ^ key[0]);
mRaw->metadata.wbCoeffs[2] = (float) (wb->getShort(offset+2) ^ key[0]);
}