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 void Shrink(Container c)
{
c.RemoveAll(Ids.MATROSKA_ID_TAGS);
c.RemoveAll(Ids.EBML_ID_VOID);
c.RemoveAll(Ids.EBML_ID_CRC32);
}
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;
}
internal static void MoveTagInfoToTracks(Container c)
{
//Moving Title and Language tags to tracks if they exists
List<EbmlGeneric> tracks = c.FindAll(Ids.MATROSKA_ID_TRACKENTRY);
List<EbmlGeneric> tags = c.FindAll(Ids.MATROSKA_ID_TAG);
foreach (EbmlMaster t in tags)
{
EbmlMaster tt = (EbmlMaster)t.FindFirst(Ids.MATROSKA_ID_TAGTARGETS);
if (tt != null)
{
EbmlMaster sp = (EbmlMaster)t.FindFirst(Ids.MATROSKA_ID_SIMPLETAG);
EbmlUint jk = (EbmlUint)tt.FindFirst(Ids.MATROSKA_ID_TAGTARGETS_TRACKUID);
if (jk != null)
{
EbmlUtf8 name = (EbmlUtf8)sp.FindFirst(Ids.MATROSKA_ID_TAGNAME);
EbmlUtf8 value = (EbmlUtf8)sp.FindFirst(Ids.MATROSKA_ID_TAGSTRING);
if (name != null && value != null)
{
string nm = name.Value.ToUpper(CultureInfo.InvariantCulture);
string vl = value.Value;
if (nm == "LANGUAGE" || nm == "TITLE" || nm == "NAME")
{
foreach (EbmlMaster j in tracks)
{
EbmlUint u = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_TRACKUID);
if (u.Value == jk.Value)
{
EbmlUtf8 change;
if (nm == "TITLE" || nm == "NAME")
{
change = (EbmlUtf8)j.FindFirst(Ids.MATROSKA_ID_TRACKNAME);
if (change == null)
{
change = new EbmlUtf8 { Id = Ids.MATROSKA_ID_TRACKNAME };
j.Value.Add(change);
}
}
else
{
change = (EbmlUtf8)j.FindFirst(Ids.MATROSKA_ID_TRACKLANGUAGE);
if (change == null)
{
change = new EbmlUtf8 { Id = Ids.MATROSKA_ID_TRACKLANGUAGE };
j.Value.Add(change);
}
}
change.Value = vl;
j.Value.Sort();
break;
}
}
}
}
}
}
}
}
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);
}
internal static void FixUIDS(Container c)
{
//Change UIDS to numeric ids.
//Fix Track IDS
List<EbmlGeneric> tracks = c.FindAll(Ids.MATROSKA_ID_TRACKENTRY);
List<EbmlGeneric> gg = c.FindAll(Ids.MATROSKA_ID_TAGTARGETS_TRACKUID);
List<EbmlGeneric> planes = c.FindAll(Ids.MATROSKA_ID_TRACKPLANEUID);
foreach (EbmlMaster j in tracks)
{
EbmlUint u = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_TRACKUID);
EbmlUint tn = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_TRACKNUMBER);
foreach (EbmlUint n in planes)
{
if (n.Value == u.Value)
{
n.Value = tn.Value;
break;
}
}
foreach (EbmlUint n in gg)
{
ulong nval = 0;
if (n.Value == u.Value)
{
n.Value = tn.Value;
break;
}
}
u.Value = tn.Value;
}
//Fix Chapters
List<EbmlGeneric> chapters = c.FindAll(Ids.MATROSKA_ID_EDITIONENTRY);
gg = c.FindAll(Ids.MATROSKA_ID_TAGTARGETS_CHAPTERUID);
ulong cnt = 1;
foreach (EbmlMaster j in chapters)
{
EbmlUint u = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_CHAPTERUID);
foreach (EbmlUint n in gg)
{
if (n.Value == u.Value)
{
n.Value = cnt;
break;
}
}
u.Value = cnt;
u = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_EDITIONUID);
if (u != null)
u.Value = cnt;
cnt++;
}
//Fix Attachments
List<EbmlGeneric> attachments = c.FindAll(Ids.MATROSKA_ID_ATTACHEDFILE);
gg = c.FindAll(Ids.MATROSKA_ID_TAGTARGETS_ATTACHUID);
cnt = 1;
foreach (EbmlMaster j in chapters)
{
EbmlUint u = (EbmlUint)j.FindFirst(Ids.MATROSKA_ID_FILEUID);
foreach (EbmlUint n in gg)
{
if (n.Value == u.Value)
{
n.Value = cnt;
break;
}
}
u.Value = cnt;
cnt++;
}
}
