static int calc_add_mv(RV34DecContext *r, int dir, int val)
{
int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
- int dist = dir ? GET_PTS_DIFF(r->next_pts, r->cur_pts) : GET_PTS_DIFF(r->cur_pts, r->last_pts);
+ int dist = dir ? -GET_PTS_DIFF(r->next_pts, r->cur_pts) : GET_PTS_DIFF(r->cur_pts, r->last_pts);
+ int mul;
if(!refdist) return 0;
- if(!dir)
- return (val * dist + refdist - 1) / refdist;
- else
- return -(val * dist / refdist);
+ mul = (dist << 14) / refdist;
+ return (val * mul + 0x2000) >> 14;
}
/**