libjpeg
libjpeg is a widely used C library for reading and writing JPEG image files.
The FFmpeg media backend uses modified code from libjpeg in `libavcodec/jfdctfst.c`, `libavcodec/jfdctint_template.c` and `libavcodec/jrevdct.c`. For list of modifications, see FFmpeg source code management system.
The sources can be found in qtmultimedia/src/3rdparty/ffmpeg.
Copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding.