On Tue, Dec 17, 2024 at 02:11:30PM +0100, Niklas Haas wrote: > From: Niklas Haas <g...@haasn.dev> > > These functions were divided into two special cases; one assuming that > uvalpha == 0, and the other assuming that uvalpha == 2048. This worked fine > for simple 2x chroma upscaling but broke for e.g. yuv410p, non-centered > chroma, > or other special cases that involved non-aligned chroma filters. > > Fix it by instead dividing this check into two cases, a uvalpha==0 fast path > and a uvalpha>0 general path. Instead of (A+B)/2 the general path now > multiplies > in the true uvalpha weight. > > I tried preserving the old fast path for the case of uvalpha == 2048, but this > was significantly slower in practise versus having just one general path. > However, we still need a uvalpha == 0 path for the unscaled case. > > Fixes: ticket #5083 > Signed-off-by: Niklas Haas <g...@haasn.dev> > Sponsored-by: Sovereign Tech Fund > --- > libswscale/output.c | 36 ++++++++++++++++++++++++------------ > 1 file changed, 24 insertions(+), 12 deletions(-)
should be ok thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The real ebay dictionary, page 1 "Used only once" - "Some unspecified defect prevented a second use" "In good condition" - "Can be repaird by experienced expert" "As is" - "You wouldnt want it even if you were payed for it, if you knew ..."
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