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.
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