This is accomplished by adding a feature to test-parse.c to switch the
byte order before dumping the EXIF output. Additionally, the MakerNote
values are now logged in the dump as well, in the same way as the
regular tags, to better catch regressions.
This new test uncovered a bug in the decoding of the
MNOTE_NIKON_TAG_FIRMWARE tag whose data should not be treated as being
endian-specific.
This is intended as a fast check that all tags, including MakerNotes, can be
parsed. It is not intended to replace the much more complete tests in
libexif-testsuite, but rather add some basic parsing test coverage without
having to download and configure a separate repository. As more tags are
identified and supported in the library in the future, the golden test files
will need to be updated to match.
The input files cover all four major MakerNote types supported by libexif and a
large proportion of the variants within those types. The test files have had
their JPEG image data stripped out to make them smaller (which also makes them
noncompliant) but it's good enough for libexif to read the tags as well as some
other EXIF tools that don't care about the image.
Patch from Google.
zhanglitao