[FFmpeg-devel] [PATCH] use JPEG color range for RoQ

[Eric Lasota]

The first-party codec uses JPEG YUV, see values in ROQ_GenYUVTables:
https://github.com/id-Software/Quake-III-Arena/blob/master/code/client/cl_cin.c

Test with idlogo.roq:
Reference implementation: http://i.imgur.com/QeywyIr.png (enlarged to work
around a rendering bug)
ffmpeg without patch: http://i.imgur.com/Q7ZHBPd.png
ffmpeg with patch: http://i.imgur.com/ZJE01uy.png
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