const int slice_start = (height * jobnr ) / nb_jobs; \
const int slice_end = (height * (jobnr + 1)) / nb_jobs; \
\
- for (int y = slice_start; y < slice_end; y++) { \
+ for (int y = slice_start; y < slice_end && !mask; y++) { \
const int16_t *const u = s->u[map] + y * uv_linesize * ws * ws; \
const int16_t *const v = s->v[map] + y * uv_linesize * ws * ws; \
const int16_t *const ker = s->ker[map] + y * uv_linesize * ws * ws; \