[FFmpeg-devel] swscale : add bitexact conv for grayf32 and gray16 to f32 conv

[Martin Vignali]

Updated patch in attach

001 and 002 : unchanged
003 : update from prev 003 : change in lut generation : move coeff calc
outside the loop, and avoid "i - min_loop" calc.
004 : update from prev 004 : change in lut generation : avoid "i -
min_loop" calc.

Martin
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