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swscale: fix 16-bit horizontal scaling underflow. 

When using e.g. lanczos scaling, values can drop below 0, so they
should never be unsigned.
This commit is contained in:
Ronald S. Bultje 2011-07-08 14:54:31 -07:00
parent 42d622fab3
commit f44d50a94c
7 changed files with 23 additions and 23 deletions
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2
libswscale/swscale.c
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@ -1854,7 +1854,7 @@ static void hScale16_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_s
for (i = 0; i < dstW; i++) {
int j;
int srcPos = filterPos[i];
unsigned int val = 0;
int val = 0;
for (j = 0; j < filterSize; j++) {
val += src[srcPos + j] * filter[filterSize * i + j];

4
tests/ref/lavfi/pixdesc
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@ -42,8 +42,8 @@ yuv422p16be 86ad3447f97969ce095afeef81fa9abf
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yuvj422p 0dfa0ed434f73be51428758c69e082cb

4
tests/ref/lavfi/pixfmts_copy
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@ -42,8 +42,8 @@ yuv422p16be 86ad3447f97969ce095afeef81fa9abf
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4
tests/ref/lavfi/pixfmts_hflip
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@ -33,8 +33,8 @@ yuv422p16be 9dbe0af0eb877987611cf04bfa577202
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yuvj422p d113871528d510a192797af59df9c05c

4
tests/ref/lavfi/pixfmts_null
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@ -42,8 +42,8 @@ yuv422p16be 86ad3447f97969ce095afeef81fa9abf
yuv422p16le a53a9b451f4a81eeae33362c1bbd07f8
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yuva420p a29884f3f3dfe1e00b961bc17bef3d47
yuvj420p 32eec78ba51857b16ce9b813a49b7189
yuvj422p 0dfa0ed434f73be51428758c69e082cb

24
tests/ref/lavfi/pixfmts_scale
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@ -11,8 +11,8 @@ bgr565le 3a514a298c6161a071ddf9963c06509d
bgr8 7f007fa6c153a16e808a9c51605a4016
bgra a5e7040f9a80cccd65e5acf2ca09ace5
gray d7786a7d9d99ac74230cc045cab5632c
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gray16le 30267f127d5734c4767f3944f1729a33
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gray16le 715a33aa1c19cb26b14f5cc000e7a3d1
monob 88c4c050758e64d120f50c7eff694381
monow d31772ebaa877fc2a78565937f7f9673
nv12 4676d59db43d657dc12841f6bc3ab452
@ -31,19 +31,19 @@ uyvy422 314bd486277111a95d9369b944fa0400
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4
tests/ref/lavfi/pixfmts_vflip
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