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Code Issues Releases Activity

avfilter/vf_hqdn3d: Fix left-shift of negative numbers

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Affected filter-hqdn3d and filter-hqdn3d-sample FATE-tests.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
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Andreas Rheinhardt
2022-11-06 17:17:39 +01:00
parent cf57147da1
commit a7ccfdc0d7
1 changed files with 1 additions and 1 deletions
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libavfilter/vf_hqdn3d.c
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@@ -180,7 +180,7 @@ static void precalc_coefs(double dist25, int depth, int16_t *ct)
gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001); gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
for (i = -(256<<LUT_BITS); i < 256<<LUT_BITS; i++) { for (i = -(256<<LUT_BITS); i < 256<<LUT_BITS; i++) {
double f = ((i<<(9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin double f = (i * (1 << (9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin
simil = FFMAX(0, 1.0 - fabs(f) / 255.0); simil = FFMAX(0, 1.0 - fabs(f) / 255.0);
C = pow(simil, gamma) * 256.0 * f; C = pow(simil, gamma) * 256.0 * f;
ct[(256<<LUT_BITS)+i] = lrint(C); ct[(256<<LUT_BITS)+i] = lrint(C);