[Libexif-devel] MakerNote support

[Rod W. <lis...@rw...>]

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Lutz M=FCller wrote:
> If you think the framework that is in CVS is useful, you could code for
>  example along libexif/olympus. But if you have other ideas on how to
>  handle MakerNotes, please tell them.

I'm going to add MakerNote support to libexif for the Pentax Optio
230/330/430 range of cameras (I have a 330 myself).  My goal is to allow
makernote entries to be edited just like any other tag and then saved bac=
k
to a new file.

It seems that the MakerNote fields for the currently supported cameras
(Canon, Olympus, and now Pentax) follow a pseudo-IFD structure, and I'm
wondering if it would be useful to just add another entry into the IFD en=
um
(EXIF_IFD_MAKER_NOTE), and then just re-use the existing exif_data_load_.=
..
routines to load in the data (after any maker-specific prefix has been
skipped over).  The only thing which needs to be handled specially is tha=
t
the tags in the makernote are in a different namespace from the normal IF=
D
tags.  It would also mean that the existing interface for editing tags in
the exif program can be re-used (you just specify a different IFD for
makernote tags).

Does this sound like a reasonable idea ?  I'm happy to write the code (an=
d
have actually started already) ...

-- Rod Whitby