exifyay
Yay, Exif! This module provides routines for reading and writing Exif data in Python, backed by strong and time-tested C libraries.
The bindings are generated by Cython and we use static linking to produce a self-contained Python C module.
Sources
libexif and libjpeg are based on version 0.6.21. We have removed some i18n related stuff and added a GPS routine from the same source where JpegEncoderEXIF comes from.
JpegEncoderEXIF uses libexif and provides a higher-level interface to set Exif data. We have added a function to unset tags and have extended the GPS support.
libexif performs the heavy lifting that lets us read and write Exif data. libjpeg is part of the exif tool closely related to libexif.
libexif and libjpeg use autotools, we use CMake because Simon could not figure out how to cleanly build static libraries that work both on OS X and Linux.
Build
cmake .
make
python setup.py installTo build you must have CMake, make, gcc, g++, Python headers, and Cython installed.
Install using pip
You can install exifyay using pip but you must still have the build requirements installed. To create binary distrbutions, you may want to have a look at fpm.
Check for memory leaks
We use Valgrind and Python built with --with-valgrind on
test scripts and make sure that no directly nor indirectly lost memory
is reported. Possibly lost memory is reported, however, but our sanity
check is to remove all libexif unref calls and such and verify that the
possibly lost memory value is unchanged.
Correctness
We verify that running the same operations on the same data more than once do not change it. We also verify that outputs can be parsed with tools like ExifTool
Contributors
Licenses
- exifyay (LGPL v3)
- libexif (LGPL v2.1)
- libjpeg (part of exif) (LGPL v2.1)
- JpegEncoderEXIF (LGPL v2.1)
- thewtex/cython-cmake-example (Apache License v2.0)
