ffmpeg | branch: master | Michael Niedermayer <michael@niedermayer.cc> | Sun Jan 27 00:49:14 2019 +0100| [5d0139d5f0aa9fc16661891e40efdb2671ff1726] | committer: Michael Niedermayer avcodec/ffv1: Simplify fold() No speed difference, or slightly faster (the difference is too small so it may be noise that this appears faster) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5d0139d5f0aa9fc166...

libavcodec/ffv1.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/libavcodec/ffv1.h b/libavcodec/ffv1.h index 653138b070..7c29d01f51 100644 --- a/libavcodec/ffv1.h +++ b/libavcodec/ffv1.h @@ -153,9 +153,7 @@ static av_always_inline int fold(int diff, int bits) if (bits == 8) diff = (int8_t)diff; else { - diff += 1 << (bits - 1); - diff = av_mod_uintp2(diff, bits); - diff -= 1 << (bits - 1); + diff = sign_extend(diff, bits); } return diff;