public void AddMaster(EbmlSig element, long size)
{
var newNode = new EbmlNodeMaster(element, size);
nodes.Add(newNode);
}
EbmlNodeMaster ParseTree(EbmlSig element)
{
string err = null;
var contentLenBuf = ReadMTF(Data.fbs, out long contentLen);
if (contentLen < 0)
{
return(null);
}
Data.ValidSize += contentLenBuf.Length;
var newMaster = new EbmlNodeMaster(element, contentLenBuf.Length + contentLen);
var buf = new byte[3];
long stop = Data.ValidSize + contentLen;
while (Data.ValidSize < stop)
{
Data.fbs.Position = Data.ValidSize;
var got = Data.fbs.Read(buf, 0, 3);
if (got < 3)
{
err = "File corrupt or truncated"; goto FATAL;
}
EbmlNode newNode;
foreach (var item in masterSigs)
{
if (item.SigIsStartOf(buf))
{
Data.fbs.Position = Data.ValidSize = Data.ValidSize + item.Signature.Count;
newNode = ParseTree(item);
if (IssueModel.Data.HasFatal)
{
if (newNode != null)
{
newMaster.AddNode(newNode);
}
return(newMaster);
}
goto NEXT;
}
}
foreach (var item in leafSigs)
{
if (item.SigIsStartOf(buf))
{
Data.fbs.Position = Data.ValidSize = Data.ValidSize + item.Signature.Count;
byte[] payload = null;
byte[] payloadHdr = ReadMTF(Data.fbs, out long payloadLen);
if (payloadHdr == null)
{
err = "File truncated or corrupt"; goto FATAL;
}
if ((item.Flag & ParseFlag.Persist) != 0)
{
payload = new byte[payloadLen];
got = Data.fbs.Read(payload, 0, (int)payloadLen);
}
if (buf[0] != CrcSig.Sig32)
{
newNode = new EbmlNodeLeaf(item, payload);
}
else
{
++Data.CrcCount;
long hashStart = Data.ValidSize + payloadHdr.Length + payloadLen;
long hashCount;
if (newMaster.Nodes.Count == 0)
{
hashCount = contentLen - 5 - payloadHdr.Length;
}
else
{
IssueModel.Add("Misplaced CRC");
hashCount = 0;
}
newNode = new EbmlNodeCRC(item, payload, hashStart, hashCount);
}
Data.ValidSize += payloadHdr.Length + payloadLen;
goto NEXT;
}
}
err = $"Unknown element [{buf[0]:X2}][{buf[1]:X2}][{buf[2]:X2}]";
goto FATAL;
NEXT:
newMaster.AddNode(newNode);
}
if (Data.ValidSize == stop)
{
return(newMaster);
}
err = "Positional error";
FATAL:
err += String.Format(" at {0:X}.", Data.ValidSize);
IssueModel.Add(err, Severity.Fatal);
return(newMaster);
}
public EbmlStackItem(EbmlNodeMaster node, int index = 0)
{
this.Node = node; this.Index = index;
}