ADBaseLibrary.Matroska.Matroska.FixPositions C# (CSharp) Method

        public static void FixPositions(Container c)
        {
            EbmlMaster segment = (EbmlMaster)c.FindFirst(Ids.MATROSKA_ID_SEGMENT);
            bool repeatpass = false;

            List<EbmlGeneric> cuepositions = c.FindAll(Ids.MATROSKA_ID_CUECLUSTERPOSITION);
            List<EbmlGeneric> clusters = c.FindAll(Ids.MATROSKA_ID_CLUSTER);
            int cnt = 1;
            foreach (EbmlUint j in cuepositions)
            {
                ulong val = j.Value + segment.InputValueOffset;
                EbmlMaster repo = (EbmlMaster)clusters.First(a => a.InputOffset == val);
                if (repo.LinkedId != 0)
                    j.LinkedId = repo.LinkedId;
                else
                {
                    repo.LinkedId = j.LinkedId = cnt;
                    cnt++;
                }
            }

            do
            {
                repeatpass = false;
                //Propagate Expected Offsets
                c.PropagateExpectedOffset();
                //Reposition Cues
                foreach (EbmlUint j in cuepositions)
                {
                    EbmlMaster repo = (EbmlMaster)clusters.First(a => a.LinkedId==j.LinkedId);
                    ulong nvalue = repo.ExpectedOffset - segment.ExpectedValueOffset;
                    if (nvalue != j.Value)
                    {
                        repeatpass = true;
                        j.Value = nvalue;
                    }
                }
                if (!repeatpass)
                {
                    //Propagate Expected Offsets
                    c.PropagateExpectedOffset();
                    //Fix Seek Header
                    EbmlMaster smas = (EbmlMaster)c.FindFirst(Ids.MATROSKA_ID_SEEKHEAD);
                    List<EbmlGeneric> seeks = c.FindAll(Ids.MATROSKA_ID_SEEKENTRY);
                    foreach (EbmlMaster sk in seeks)
                    {
                        EbmlUint id = (EbmlUint)sk.FindFirst(Ids.MATROSKA_ID_SEEKID);
                        if (id != null)
                        {
                            EbmlUint pos = (EbmlUint)sk.FindFirst(Ids.MATROSKA_ID_SEEKPOSITION);
                            EbmlGeneric gen = segment.FindFirst(id.Value);
                            if (gen == null)
                            {
                                repeatpass = true;
                                smas.Value.Remove(sk);
                                break;
                            }
                            ulong nval = gen.ExpectedOffset - segment.ExpectedValueOffset;
                            if (pos.Value != nval)
                            {
                                pos.Value = nval;
                                repeatpass = true;
                            }
                        }
                    }
                }
            } while (repeatpass);
        }