OpenJPEG is an open-source JPEG 2000 codec written in C language. It has been developed in order to promote the use of JPEG 2000, a still-image compression standard from the Joint Photographic Experts Group (JPEG). Since April 2015, it is officially recognized by ISO/IEC and ITU-T as a JPEG 2000 Reference Software.
OpenJPEGJNI is a fork of the original OpenJPEG open-source project (as found on github : https://github.com/uclouvain/openjpeg/) that fixes and improves the broken JNI code and bindings for only the JPEG decoder.
It also provides binaries of the native libraries (the JNI and the OpenJP2 libraries) for Windows x86 and x86_64 architectures, for Linux x86 and x86_64 architectures, and for Android armeabi-v7a, arm64-v8a, x86 and x86_64 ABIs targeting API 16.
ALL the code, with the exception of the code under wrapping folder, is the same as in the version 2.3.1 of the original OpenJPEG repository, which is the latest release so far.
All the code that I had to modify / add is under the wrapping folder and the root CMakeLists.txt.
Please note that only the JNI decoder has been implemented and tested using Java 1.8, on Windows, Linux and Android.
Details on how I managed to make the JNI part of OpenJPEG work can be found here.
Details on how to build OpenJPEGJNI for Windows, Linux and Android can be found here.
Details on how to load and use the OpenJPEGJNI library can be found here.
Anyone. As the OpenJPEG code is released under the BSD 2-clause "Simplified" License, anyone can use or modify the code, even for commercial applications. The only restriction is to retain the copyright in the sources or in the binaries documentation.
The JNI part has been solely modified by me.
The library is developed and maintained by the Image and Signal Processing Group (ISPGroup), in the Université catholique de Louvain (UCL, with the support of the CNES, the CS company and the intoPIX company. The JPWL module has been developed by the Digital Signal Processing Lab (DSPLab) of the University of Perugia, Italy (UNIPG).
- src
- lib
- openjp2: contains the sources of the openjp2 library (Part 1 & 2)
- openjpwl: contains the additional sources if you want to build a JPWL-flavoured library.
- openjpip: complete client-server architecture for remote browsing of jpeg 2000 images.
- openjp3d: JP3D implementation
- openmj2: MJ2 implementation
- bin: contains all applications that use the openjpeg library
- common: common files to all applications
- jp2: a basic codec
- mj2: motion jpeg 2000 executables
- jpip: OpenJPIP applications (server and dec server)
- java: a Java client viewer for JPIP
- jp3d: JP3D applications
- tcltk: a test tool for JP3D
- wx
- OPJViewer: gui for displaying j2k files (based on wxWidget)
- lib
- wrapping
- java: java jni to use openjpeg in a java program
- thirdparty: thirdparty libraries used by some applications. These libraries will be built only if there are not found on the system. Note that libopenjpeg itself does not have any dependency.
- doc: doxygen documentation setup file and man pages
- tests: configuration files and utilities for the openjpeg test suite. All test images are located in openjpeg-data repository.
- cmake: cmake related files
- scripts: scripts for developers
See LICENSE for license and copyright information.
See INSTALL for installation procedures.
See NEWS for user visible changes in successive releases.
An API/ABI timeline is automatically updated here.
OpenJPEG strives to provide a stable API/ABI for your applications. As such it
only exposes a limited subset of its functions. It uses a mechanism of
exporting/hiding functions. If you are unsure which functions you can use in
your applications, you should compile OpenJPEG using something similar to gcc:
-fvisibility=hidden compilation flag.
See also: http://gcc.gnu.org/wiki/Visibility
On windows, MSVC directly supports export/hiding function and as such the only API available is the one supported by OpenJPEG.