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 void ReadData(Stream src)
{
var reader = new EbmlReader(src);
var readMap = new[]
{
new {Element = MatroskaDtd.Segment.Info.Title, Code = new Action(() => _title = reader.ReadUtf())},
new {Element = MatroskaDtd.Segment.Info.WritingApp, Code = new Action(() => _writingApp = reader.ReadUtf())},
new {Element = MatroskaDtd.Segment.Info.MuxingApp, Code = new Action(() => MuxingApp = reader.ReadUtf())},
new {Element = MatroskaDtd.Segment.Info.Duration, Code = new Action(() => Duration = TimeSpan.FromMilliseconds(reader.ReadFloat()))},
};
if (!reader.LocateElement(MatroskaDtd.Segment))
throw new InvalidDataException("Failed to locate Segment");
reader.EnterContainer();
var segmentInfoIdentifier = MatroskaDtd.Segment.Info.Identifier;
// support for Void block right before SegmentInfo
var priorElementId = VInt.MakeId(0);
var priorElementStart = -1l;
// locate SegmentInfo and track its predesessor
while (reader.ReadNext())
{
if (reader.ElementId == segmentInfoIdentifier) break;
priorElementId = reader.ElementId;
priorElementStart = reader.ElementPosition;
}
if (reader.ElementId != segmentInfoIdentifier)
throw new InvalidDataException("Failed to locate Segment");
_dataStart = priorElementId == StandardDtd.Void.Identifier ? priorElementStart : reader.ElementPosition;
var oldDataStart = reader.ElementPosition;
reader.EnterContainer();
while (reader.ReadNext())
{
var entry = readMap.FirstOrDefault(arg => arg.Element.Identifier == reader.ElementId);
if (entry != null)
entry.Code();
}
reader.LeaveContainer();
// getting start of the next element
reader.ReadNext();
if (reader.ElementId == StandardDtd.Void.Identifier)
{
reader.ReadNext();
}
_dataLength = (int)(reader.ElementPosition - _dataStart);
var oldDataLen = (int)(reader.ElementPosition - oldDataStart);
_oldSegmentInfoData = new byte[oldDataLen];
_stream.Seek(oldDataStart, SeekOrigin.Begin);
_stream.Read(_oldSegmentInfoData, 0, oldDataLen);
}
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();
}
