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Code Issues Releases Activity

avfilter/vf_paletteuse: fix some integer overflows

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This commit is contained in:
Paul B Mahol
2021-08-18 23:31:03 +02:00
parent 835eb0a556
commit 6d09de90d1
1 changed files with 6 additions and 6 deletions
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12
libavfilter/vf_paletteuse.c
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@@ -380,9 +380,9 @@ static av_always_inline int get_dst_color_err(PaletteUseContext *s,
if (dstx < 0)
return dstx;
dstc = s->palette[dstx];
*er = r - (dstc >> 16 & 0xff);
*eg = g - (dstc >> 8 & 0xff);
*eb = b - (dstc & 0xff);
*er = (int)r - (int)(dstc >> 16 & 0xff);
*eg = (int)g - (int)(dstc >> 8 & 0xff);
*eb = (int)b - (int)(dstc & 0xff);
return dstx;
}
@@ -597,8 +597,8 @@ static int cmp_##name(const void *pa, const void *pb) \
{ \
const struct color *a = pa; \
const struct color *b = pb; \
return (a->value >> (8 * (3 - (pos))) & 0xff) \
- (b->value >> (8 * (3 - (pos))) & 0xff); \
return (int)(a->value >> (8 * (3 - (pos))) & 0xff) \
- (int)(b->value >> (8 * (3 - (pos))) & 0xff); \
}
DECLARE_CMP_FUNC(a, 0)
@@ -704,7 +704,7 @@ static int colormap_insert(struct color_node *map,
/* get the two boxes this node creates */
box1 = box2 = *box;
box1.max[component-1] = node->val[component];
box2.min[component-1] = node->val[component] + 1;
box2.min[component-1] = FFMIN(node->val[component] + 1, 255);
node_left_id = colormap_insert(map, color_used, nb_used, palette, trans_thresh, &box1);