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filter_kernels: correct spline64 kernel 

This seems to have had some copy/paste errors. It should now match the
implementation in fmtconv:
https://github.com/EleonoreMizo/fmtconv/blob/00453a86dd73/src/fmtcl/ContFirSpline64.cpp#L58-L76
This commit is contained in:
James Ross-Gowan 2017-08-29 18:38:50 +10:00 committed by Niklas Haas
parent d280b3db93
commit 9a28088e74
1 changed files with 4 additions and 4 deletions
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8
video/out/filter_kernels.c
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@ -293,13 +293,13 @@ static double spline36(params *p, double x)
static double spline64(params *p, double x)
{
if (x < 1.0) {
return ((49.0/41.0 * x - 6387.0/2911.0) * x - 3.0/911.0) * x + 1.0;
return ((49.0/41.0 * x - 6387.0/2911.0) * x - 3.0/2911.0) * x + 1.0;
} else if (x < 2.0) {
return ((-24.0/42.0 * (x-1) + 4032.0/2911.0) * (x-1) - 2328.0/ 2911.0) * (x-1);
return ((-24.0/41.0 * (x-1) + 4032.0/2911.0) * (x-1) - 2328.0/2911.0) * (x-1);
} else if (x < 3.0) {
return ((6.0/41.0 * (x-2) - 1008.0/2911.0) * (x-2) + 582.0/2911.0) * (x-2);
return ((6.0/41.0 * (x-2) - 1008.0/2911.0) * (x-2) + 582.0/2911.0) * (x-2);
} else {
return ((-1.0/41.0 * (x-3) - 168.0/2911.0) * (x-3) + 97.0/2911.0) * (x-3);
return ((-1.0/41.0 * (x-3) + 168.0/2911.0) * (x-3) - 97.0/2911.0) * (x-3);
}
}