+static int scan_mmco_reset(AVCodecParserContext *s)
+{
+ H264ParseContext *p = s->priv_data;
+ H264Context *h = &p->h;
+ H264SliceContext *sl = &h->slice_ctx[0];
+
+ sl->slice_type_nos = s->pict_type & 3;
+
+ if (h->pps.redundant_pic_cnt_present)
+ get_ue_golomb(&sl->gb); // redundant_pic_count
+
+ if (ff_set_ref_count(h, sl) < 0)
+ return AVERROR_INVALIDDATA;
+
+ if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
+ int list;
+ for (list = 0; list < sl->list_count; list++) {
+ if (get_bits1(&sl->gb)) {
+ int index;
+ for (index = 0; ; index++) {
+ unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(&sl->gb);
+
+ if (reordering_of_pic_nums_idc < 3)
+ get_ue_golomb(&sl->gb);
+ else if (reordering_of_pic_nums_idc > 3) {
+ av_log(h->avctx, AV_LOG_ERROR,
+ "illegal reordering_of_pic_nums_idc %d\n",
+ reordering_of_pic_nums_idc);
+ return AVERROR_INVALIDDATA;
+ } else
+ break;
+
+ if (index >= sl->ref_count[list]) {
+ av_log(h->avctx, AV_LOG_ERROR,
+ "reference count %d overflow\n", index);
+ return AVERROR_INVALIDDATA;
+ }
+ }
+ }
+ }
+ }
+
+ if ((h->pps.weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
+ (h->pps.weighted_bipred_idc == 1 && sl->slice_type_nos == AV_PICTURE_TYPE_B))
+ ff_pred_weight_table(h, sl);
+
+ if (get_bits1(&sl->gb)) { // adaptive_ref_pic_marking_mode_flag
+ int i;
+ for (i = 0; i < MAX_MMCO_COUNT; i++) {
+ MMCOOpcode opcode = get_ue_golomb_31(&sl->gb);
+ if (opcode > (unsigned) MMCO_LONG) {
+ av_log(h->avctx, AV_LOG_ERROR,
+ "illegal memory management control operation %d\n",
+ opcode);
+ return AVERROR_INVALIDDATA;
+ }
+ if (opcode == MMCO_END)
+ return 0;
+ else if (opcode == MMCO_RESET)
+ return 1;
+
+ if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
+ get_ue_golomb(&sl->gb);
+ if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
+ opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
+ get_ue_golomb_31(&sl->gb);
+ }
+ }
+
+ return 0;
+}
+