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; }