third_party/exiv2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

RAF: Simplify metadata extraction

Browse Source 
Remove manual TiffParser usage for reading APP1 segement,
instead use JpegImage for proper parsing.
This commit is contained in:
Daniel Vogelbacher 2023-05-15 19:25:35 +02:00
parent 6c4b6d9d7f
commit d27c5ac838
1 changed files with 8 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
src/rafimage.cpp
View File

@ -259,27 +259,18 @@ void RafImage::readMetadata() {
throw Error(ErrorCode::kerFailedToReadImageData);
}
// Extracting metadata from first APP1 container
constexpr byte tiff_offset = 12;
ByteOrder bo = TiffParser::decode(exifData_, iptcData_, xmpData_, jpg_buf.c_data() + tiff_offset, jpg_buf.size() - tiff_offset);
// If there is no XMP data in first APP1 EXIF structure, there is maybe
// another APP1 container for XMP. Just use the JpegImage metadata parser for that.
if(xmpData_.empty()) {
auto jpg_io = std::make_unique<Exiv2::MemIo>(jpg_buf.data(), jpg_buf.size());
auto jpg_img = JpegImage(std::move(jpg_io), false);
jpg_img.readMetadata();
const auto jpg_xmp_data = jpg_img.xmpData();
for(auto& datum : jpg_xmp_data) {
xmpData_.add(datum);
}
}
// Retreive metadata from embedded JPEG preview image.
auto jpg_io = std::make_unique<Exiv2::MemIo>(jpg_buf.data(), jpg_buf.size());
auto jpg_img = JpegImage(std::move(jpg_io), false);
jpg_img.readMetadata();
setByteOrder(jpg_img.byteOrder());
xmpData_ = jpg_img.xmpData();
exifData_ = jpg_img.exifData();
iptcData_ = jpg_img.iptcData();
exifData_["Exif.Image2.JPEGInterchangeFormat"] = getULong(jpg_img_offset, bigEndian);
exifData_["Exif.Image2.JPEGInterchangeFormatLength"] = getULong(jpg_img_length, bigEndian);
setByteOrder(bo);
// parse the tiff
byte readBuff[4];
if (io_->seek(100, BasicIo::beg) != 0)