The JPEGView example can encode and decode JPEG images. It is an application rather than a library, like IJL, so I don't know how to answer your question. It provides the same basic functionality but it does it differently...
I suggest you download the samples and review them directly to determine if they are of value for your application needs.
Note that there is a UIC sample which is NOT part of the legacy samples and will continue to be supported in future versions of the IPP library. These legacy samples will be going away. Even the readme notes for JPEGView indicate that you should move to UIC.
The JPEGView overview from the readme included with the sample is reproduced below.
- - - - JPEGView Overview - - - -
Note:The basic features of this sample have been transferred toa new"Unified Image Codec (UIC) sample",please check UIC sample under directoryipp-samples\image-codecs\uic for more details. This sample will be removed in near future.
decoder (see jpegcodec/jpegdec.h for details)