Keep qp fields within the range.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
s->HEVClc.first_qp_group = !s->sh.dependent_slice_segment_flag;
if (!s->pps->cu_qp_delta_enabled_flag)
- s->HEVClc.qp_y = ((s->sh.slice_qp + 52 + 2 * s->sps->qp_bd_offset) %
- (52 + s->sps->qp_bd_offset)) - s->sps->qp_bd_offset;
+ s->HEVClc.qp_y = FFUMOD(s->sh.slice_qp + 52 + 2 * s->sps->qp_bd_offset,
+ 52 + s->sps->qp_bd_offset) - s->sps->qp_bd_offset;
s->slice_initialized = 1;
s->nal_unit_type == NAL_BLA_N_LP)
#define IS_IRAP(s) (s->nal_unit_type >= 16 && s->nal_unit_type <= 23)
+#define FFUDIV(a,b) (((a) > 0 ? (a) : (a) - (b) + 1) / (b))
+#define FFUMOD(a,b) ((a) - (b) * FFUDIV(a,b))
+
/**
* Table 7-3: NAL unit type codes
*/
if (s->HEVClc.tu.cu_qp_delta != 0) {
int off = s->sps->qp_bd_offset;
- s->HEVClc.qp_y = ((qp_y + s->HEVClc.tu.cu_qp_delta + 52 + 2 * off) %
- (52 + off)) - off;
+ s->HEVClc.qp_y = FFUMOD(qp_y + s->HEVClc.tu.cu_qp_delta + 52 + 2 * off,
+ 52 + off) - off;
} else
s->HEVClc.qp_y = qp_y;
}