const int start = (height * jobnr) / nb_jobs;
const int end = (height * (jobnr+1)) / nb_jobs;
const int max = s->max;
- const int tff = s->field == (s->parity == -1 ? cur->top_field_first == 1 : s->parity == 0 ? 1 : 0);
+ const int tff = (s->field == (s->parity == -1 ? cur->top_field_first == cur->interlaced_frame : s->parity == 0 ? !cur->interlaced_frame : cur->interlaced_frame));
int j, y_in, y_out;
/* copy unchanged the lines of the field */