public static void MatroskaHash(string inpath, string outpath)
{
FileInfo f = new FileInfo(inpath);
Stream i = File.OpenRead(inpath);
BinaryReader reader = new BinaryReader(i);
Container c = new Container();
c.Read(reader, (ulong)f.Length);
FixUIDS(c);
EbmlBinary segmentuid = NormalizeHeader(c);
MoveTagInfoToTracks(c);
Shrink(c);
FixPositions(c);
Stream o = File.Open(outpath, FileMode.Create, FileAccess.Write);
BinaryWriter writer = new BinaryWriter(o);
MD5 md5 = MD5.Create();
c.Write(writer, md5);
//Using Cluster Data MD5 as segment UID
byte[] b = new byte[0];
md5.TransformFinalBlock(b, 0, 0);
byte[] hash = md5.Hash;
segmentuid.Value = hash;
writer.BaseStream.Seek((long)segmentuid.OutputValueOffset, SeekOrigin.Begin);
writer.Write(hash);
writer.Close();
reader.Close();
i.Close();
o.Close();
}
internal static EbmlBinary NormalizeHeader(Container c)
{
//Remove DATEUTC
EbmlMaster info = (EbmlMaster)c.FindFirst(Ids.MATROSKA_ID_INFO);
EbmlBinary date = (EbmlBinary)info.FindFirst(Ids.MATROSKA_ID_DATEUTC);
if (date != null)
{
info.Value.Remove(date);
}
//Changing Muxing and Writting App to a Constant.
EbmlUtf8 muxapp = (EbmlUtf8)info.FindFirst(Ids.MATROSKA_ID_MUXINGAPP);
if (muxapp == null)
{
muxapp = new EbmlUtf8 {
Id = Ids.MATROSKA_ID_MUXINGAPP
};
info.Value.Add(muxapp);
}
EbmlUtf8 wrtapp = (EbmlUtf8)info.FindFirst(Ids.MATROSKA_ID_WRITINGAPP);
if (wrtapp == null)
{
wrtapp = new EbmlUtf8 {
Id = Ids.MATROSKA_ID_WRITINGAPP
};
info.Value.Add(wrtapp);
}
muxapp.Value = wrtapp.Value = "AOD";
EbmlBinary seguid = (EbmlBinary)info.FindFirst(Ids.MATROSKA_ID_SEGMENTUID);
if (seguid == null)
{
seguid = new EbmlBinary {
Id = Ids.MATROSKA_ID_SEGMENTUID, Value = new byte[16]
};
info.Value.Add(seguid);
}
info.Value.Sort();
return(seguid);
}
