public static ResultOfParsingMKV GetSubFromFile(string mkvFilePath)
{
ResultOfParsingMKV resPars = new ResultOfParsingMKV();
using (var fs = new FileStream(mkvFilePath, FileMode.Open, FileAccess.Read))
{
using (EbmlReader ebmlReader = new EbmlReader(fs))
{
var segmentFound = ebmlReader.LocateElement(MatroskaElementDescriptorProvider.Segment);
if (segmentFound)
{
StringBuilder sb = new StringBuilder();
MatroskaElementDescriptorProvider medp = new MatroskaElementDescriptorProvider();
ReadContainer(ebmlReader, medp, resPars, 0, sb);
}
}
}
// reenumerate
foreach(var elm in resPars.dicSub)
{
int i = 1;
var coll = elm.Value.Items.OrderBy(x => x.TimeStart);
foreach(var elm2 in coll)
{
elm2.Number = i++;
}
}
return resPars;
}
private static void AnalizeTrackEntry(EbmlReader ebmlReader, MatroskaElementDescriptorProvider medp, ResultOfParsingMKV resPars, StringBuilder sb, string GroupName = "", string add = "")
{
ulong TrackNumber = 0;
ulong TrackUID = 0;
ulong TrackType = 0;
ulong FlagDefault = 0;
ulong FlagLacing = 0;
string CodecID = "";
string Name = "";
ulong DefaultDuration = 0;
string Language = "";
ebmlReader.EnterContainer();
while (ebmlReader.ReadNext())
{
var descriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (descriptor == null)
{
sb.Append(add + "undefined \r\n");
continue;
}
string dName = descriptor.Name;
sb.Append(add + dName);
switch (descriptor.Type)
{
case ElementType.MasterElement:
sb.Append("\r\n");
//ReadContainer(ebmlReader, medp, dicSub, CurrentClusterTimeCode, sb, descriptor.Name, add + " ");
break;
case ElementType.AsciiString:
string strVal = ebmlReader.ReadAscii();
if(dName == "CodecID") CodecID = strVal;
if (dName == "Language") Language = strVal;
sb.Append(" = " + strVal);
break;
case ElementType.Binary:
break;
case ElementType.Date:
sb.Append(" = " + ebmlReader.ReadDate());
break;
case ElementType.Float:
double flVal = ebmlReader.ReadFloat();
sb.Append(" = " + flVal);
break;
case ElementType.None:
sb.Append(" (none)");
break;
case ElementType.SignedInteger:
sb.Append(" = " + ebmlReader.ReadInt());
break;
case ElementType.UnsignedInteger:
ulong ulVal = ebmlReader.ReadUInt();
if(dName == "TrackNumber") TrackNumber = ulVal;
if(dName == "TrackType") TrackType = ulVal;
if(dName == "FlagDefault") FlagDefault = ulVal;
if(dName == "FlagLacing ") FlagLacing = ulVal;
if(dName == "DefaultDuration") DefaultDuration = ulVal;
if (dName == "TrackUID") TrackUID = ulVal;
sb.Append(" = " + ulVal);
break;
case ElementType.Utf8String:
string utfStr = ebmlReader.ReadUtf();
if (dName == "Name") Name = utfStr;
sb.Append(" = " + utfStr);
break;
}
sb.Append("\r\n");
}
ebmlReader.LeaveContainer();
// If it's subtitles track
if (TrackType == 17) {
Subtitles sub = new Subtitles();
sub.Items = new SynchronizedObservableCollection<SubtitleItem>();
sub.Language = Language.Length == 0 ? "eng" : Language;
sub.Type = Name;
sub.Format = CodecID;
sub.TrackUID = (long)TrackUID;
resPars.dicSub.Add(Convert.ToInt16(TrackNumber),sub);
}
// If it's subtitles track
if (TrackType == 2)
{
AudioTrack aud = new AudioTrack();
aud.Language = Language.Length == 0 ? "eng" : Language;
aud.CodecID = CodecID;
aud.Number = resPars.AudioTracks.Count + 1;
resPars.AudioTracks.Add(aud);
}
}
private static void ReadContainer(EbmlReader ebmlReader, MatroskaElementDescriptorProvider medp, ResultOfParsingMKV resPars, ulong CurrentClusterTimeCode, StringBuilder sb, string GroupName = "", string add = "")
{
ebmlReader.EnterContainer();
while (ebmlReader.ReadNext())
{
var descriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (descriptor == null)
{
sb.Append(add + "undefined \r\n");
continue;
}
string dName = descriptor.Name;
sb.Append(add + dName);
if (dName == "TrackEntry") {
AnalizeTrackEntry(ebmlReader,medp,resPars,sb,GroupName,add);
continue;
}
switch (descriptor.Type)
{
case ElementType.MasterElement:
sb.Append("\r\n");
ReadContainer(ebmlReader, medp, resPars, CurrentClusterTimeCode, sb,descriptor.Name, add + " ");
break;
case ElementType.AsciiString:
sb.Append(" = " + ebmlReader.ReadAscii());
break;
case ElementType.Binary:
if (GroupName == "BlockGroup" && (dName == "Block" || dName == "SimpleBlock"))
{
int lSize = ebmlReader.ElementSize > 1000?1000:Convert.ToInt16(ebmlReader.ElementSize);
byte[] arr = new byte[lSize];
ebmlReader.ReadBinary(arr, 0, lSize);
int TrackNumber = arr[0] & 0x0F;
ulong DurationFromCluster = Convert.ToUInt64(arr[1] * 0xFF + arr[2]);
if (resPars.dicSub.ContainsKey(TrackNumber))
{
Subtitles lsub = resPars.dicSub[TrackNumber];
SubtitleItem subitem = new SubtitleItem();
lsub.Items.Add(subitem);
//subitem.Text = System.Text.Encoding.ASCII.GetString(arr, 4, lSize-4);
subitem.Text = System.Text.Encoding.UTF8.GetString(arr, 4, lSize - 4);
subitem.TimeStart = ((int)(CurrentClusterTimeCode + DurationFromCluster));
// reading the BlockDuration
ebmlReader.ReadNext();
ulong BlockDuration = ebmlReader.ReadUInt();
subitem.TimeEnd = subitem.TimeStart + ((int)BlockDuration);
}
}
sb.Append(" (binary size " + ebmlReader.ElementSize + ")");
break;
case ElementType.Date:
sb.Append(" = " + ebmlReader.ReadDate());
break;
case ElementType.Float:
double flVal = ebmlReader.ReadFloat();
sb.Append(" = " + flVal);
break;
case ElementType.None:
sb.Append(" (none)");
break;
case ElementType.SignedInteger:
sb.Append(" = " + ebmlReader.ReadInt());
break;
case ElementType.UnsignedInteger:
ulong ulVal = ebmlReader.ReadUInt();
if (GroupName == "Cluster" && dName == "Timecode")
{
CurrentClusterTimeCode = ulVal;
}
sb.Append(" = " + ulVal);
break;
case ElementType.Utf8String:
sb.Append(" = " + ebmlReader.ReadUtf());
break;
}
sb.Append("\r\n");
}
ebmlReader.LeaveContainer();
}
