Le 19/02/2013 09:29, Kostya Shishkov a écrit :
+static int tag_tree_size(int w, int h)
>+{
>+ int res = 0;
>+ while (w > 1 || h > 1){
>+ res += w * h;
>+ w = (w+1) >> 1;
>+ h = (h+1) >> 1;
>+ }
>+ return res + 1;
The value obtained here may be too large, so it would be nice to check it.
you mean modifications like
static uint16_t tag_tree_size(int w, int h)
{
uint32_t res = 0;
while (w > 1 || h > 1) {
res += w * h;
if ( (res + 1) >= MAX_UINT16)
return NULL;
w = (w + 1) >> 1;
h = (h + 1) >> 1;
}
return (uint16_t)(res + 1);
}
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
