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lavfi/mp=decimate: fix off-by-one logic in diff_C() x loop

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Set x offset values in the range 0-7, rather than in the range 8-1.

The y loop is changed accordingly, to avoid confusion.

This also fixes output difference with the new pending native decimate
filter.
This commit is contained in:
Stefano Sabatini
2012-08-29 13:08:49 +02:00
parent e64b941dbc
commit 6c0107822d
1 changed files with 2 additions and 2 deletions
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4
libavfilter/libmpcodecs/vf_decimate.c
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@@ -82,8 +82,8 @@ static int diff_MMX(unsigned char *old, unsigned char *new, int os, int ns)
static int diff_C(unsigned char *old, unsigned char *new, int os, int ns) static int diff_C(unsigned char *old, unsigned char *new, int os, int ns)
{ {
int x, y, d=0; int x, y, d=0;
for (y = 8; y; y--) { for (y = 0; y < 8; y++) {
for (x = 8; x; x--) { for (x = 0; x < 8; x++) {
d += abs(new[x] - old[x]); d += abs(new[x] - old[x]);
} }
new += ns; new += ns;