avfilter/phase_template: Fix left-shift of negative numbers

Affected the filter-phase FATE-test. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2 years ago · cf57147da1
parent e72e8ec515
commit cf57147da1
1 changed files with 1 additions and 1 deletions
--- a/libavfilter/phase_template.c
+++ b/libavfilter/phase_template.c
@ -46,7 +46,7 @@
 *
 * (The result is actually multiplied by 25)
 */
-#define DIFF(a, as, b, bs) ((t) = ((*(a) - (b)[bs]) << 2) + (a)[(as) << 1] - (b)[-(bs)], (t) * (t))
+#define DIFF(a, as, b, bs) ((t) = ((*(a) - (b)[bs]) * 4) + (a)[(as) * 2] - (b)[-(bs)], (t) * (t))

 /*
 * Find which field combination has the smallest average squared difference