public Model(Stream stream, byte[] hdr, string path)
{
base._data = Data = new FlvFormat(this, stream, path);
var bb = new byte[15];
Data.flags = hdr[4];
if ((Data.flags & 0xA) != 0)
{
IssueModel.Add("Unexpected flags.");
}
if ((Data.flags & 5) == 0)
{
IssueModel.Add("Missing audio and video.");
}
UInt32 hdrSize = ConvertTo.FromBig32ToUInt32(hdr, 5);
if (hdrSize != 9)
{
IssueModel.Add("Wrong header size.");
}
Data.mediaPosition = 9;
UInt32 actualPrevSize = 0;
while (Data.mediaPosition < Data.FileSize)
{
if (Data.mediaPosition + 15 > Data.FileSize)
{
IssueModel.Add("File truncated near packet header.", Severity.Fatal); return;
}
Data.fbs.Position = Data.mediaPosition;
var got = Data.fbs.Read(bb, 0, bb.Length);
if (got < bb.Length)
{
IssueModel.Add("Read error", Severity.Fatal); return;
}
Data.mediaPosition += 15;
UInt32 storedPrevSize = ConvertTo.FromBig32ToUInt32(bb, 0);
if (storedPrevSize != actualPrevSize)
{
IssueModel.Add("Bad previous packet size.");
}
byte packetType = bb[4];
UInt32 packetSize = ConvertTo.FromBig24ToUInt32(bb, 5);
actualPrevSize = packetSize + 11;
++Data.PacketCount;
Data.mediaPosition += packetSize;
}
if (Data.mediaPosition > Data.FileSize)
{
IssueModel.Add("File truncated.", Severity.Fatal);
}
}
