Re: [Libexif-devel] Question about JPG file access and Exif Header access

[Dan F. <da...@co...>]

On Tue, Dec 30, 2008 at 12:51:42PM -0800, Benny Smith wrote:
> I am trying to use libexif for the first time.
> 
> I am working in an embedded environment and I want to read from and write to
> Exif headers in JPG files stored on a compact flash card.
> 
> I have not done any of this before.
> 
> I have looked at the test programs (test-mem.c , test-value.c, etc.)
> included with the libexif package.
> 
> I do not see any file access commands in these programs, wherein a JPG file
> is opened or closed.

A couple of example programs were checked in to contrib/examples/ after the
last release. You can take a look at them at
http://libexif.cvs.sourceforge.net/viewvc/libexif/libexif/contrib/examples/
The exif front-end is pretty readable as well, so you can just trace through
that code to see how it works.  The API documentation at
http://libexif.sourceforge.net/api/ has been greatly expanded since the last
release as well.

> Also, I am trying to understand how libexif will know about and be able to
> write to/read from the memory on my microcontroller module ((I have 128K of
> RAM available).

Did you want more specific information than you got a few weeks ago?  libexif
uses memory on both the stack and heap, using the standard C allocation
methods..

>>> Dan
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