int ff_h264_decode_ref_pic_marking(const H264Context *h, H264SliceContext *sl, GetBitContext *gb) { int i; MMCO *mmco = sl->mmco; int nb_mmco = 0; if (h->nal_unit_type == NAL_IDR_SLICE) { // FIXME fields skip_bits1(gb); // broken_link if (get_bits1(gb)) { mmco[0].opcode = MMCO_LONG; mmco[0].long_arg = 0; nb_mmco = 1; } sl->explicit_ref_marking = 1; } else { sl->explicit_ref_marking = get_bits1(gb); if (sl->explicit_ref_marking) { for (i = 0; i < MAX_MMCO_COUNT; i++) { MMCOOpcode opcode = get_ue_golomb_31(gb); mmco[i].opcode = opcode; if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG) { mmco[i].short_pic_num = (sl->curr_pic_num - get_ue_golomb(gb) - 1) & (sl->max_pic_num - 1); #if 0 if (mmco[i].short_pic_num >= h->short_ref_count || !h->short_ref[mmco[i].short_pic_num]) { av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control " "operation %d\n", mmco); return -1; } #endif } if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED || opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG) { unsigned int long_arg = get_ue_golomb_31(gb); if (long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_SET_MAX_LONG && long_arg == 16) && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE(h)))) { av_log(h->avctx, AV_LOG_ERROR, "illegal long ref in memory management control " "operation %d\n", opcode); return -1; } mmco[i].long_arg = long_arg; } if (opcode > (unsigned) MMCO_LONG) { av_log(h->avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode); return -1; } if (opcode == MMCO_END) break; } nb_mmco = i; } } sl->nb_mmco = nb_mmco; return 0; }