[Libexif-devel] Ignoring unsupported makernotes?

[Jef D. <jef...@ho...>]

We are working on adding exif makernotes support to gthumb [1]. The 
problem is that many of those tags are still unknown. It would be really 
useful if there was some way to ignore those unknown tags. There is the 
EXIF_DATA_OPTION_IGNORE_UNKNOWN_TAGS option, but as far as I know, it is 
only used for the normal exif tags. Is it possible to honor this flag 
for makernotes too? Or is there another method to obtain the same result?

For instance for canon makernotes, libexif returns the name of the 
parent tag for unknown subtags. Like "Settings (first part)" and 
"Settings (second part)".

[1] http://bugzilla.gnome.org/show_bug.cgi?id=339648