public void MkvInfo(string filePath)
{
using (var dataStream = File.OpenRead(filePath))
{
var reader = new EbmlReader(dataStream);
//reader.EnterContainer();
var headDumper = MakeElementDumper(
StandardDtd.EBMLDesc.EBMLVersion,
StandardDtd.EBMLDesc.EBMLReadVersion,
StandardDtd.EBMLDesc.DocTypeVersion,
StandardDtd.EBMLDesc.DocType,
StandardDtd.EBMLDesc.DocTypeReadVersion);
var trackInfoDumper = MakeElementDumper(
MatroskaDtd.Tracks.TrackEntry.TrackNumber,
MatroskaDtd.Tracks.TrackEntry.Name,
MatroskaDtd.Tracks.TrackEntry.Language,
MatroskaDtd.Tracks.TrackEntry.TrackType,
MatroskaDtd.Tracks.TrackEntry.CodecName
);
reader.ReadNext();
Assert.AreEqual(StandardDtd.EBML.Identifier, reader.ElementId);
headDumper(reader);
if (reader.LocateElement(MatroskaDtd.Segment))
{
reader.EnterContainer();
if (reader.LocateElement(MatroskaDtd.Tracks))
{
Console.WriteLine("Tracks");
reader.EnterContainer();
while (reader.ReadNext())
{
if (reader.ElementId == MatroskaDtd.Tracks.TrackEntry.Identifier)
{
trackInfoDumper(reader);
}
Console.WriteLine();
}
reader.LeaveContainer();
Console.WriteLine("end of Tracks");
}
if (reader.LocateElement(MatroskaDtd.Segment.Cluster))
{
Console.WriteLine("Got first track");
// TODO have to deal with interlaced track data
}
// reader.LeaveContainer();
}
}
}
private static void MatroskaTagsDescriptor(EbmlReader ebmlReader, MatroskaElementDescriptorProvider medp, string tab)
{
//Console.WriteLine("\t " + (ebmlReader.ElementSize));
while (ebmlReader.ReadNext())
{
var descriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (descriptor == null) continue;
if (descriptor.Name == "Cluster") continue;
if (descriptor.Name == "Cues") continue;
Console.WriteLine(tab + descriptor.Name + " " + ebmlReader.ElementPosition);
if (descriptor.Type == ElementType.MasterElement)
{
ebmlReader.EnterContainer();
MatroskaTagsDescriptor(ebmlReader, medp, tab + "\t");
}
}
ebmlReader.LeaveContainer();
}
private void WriteData()
{
var reader = new EbmlReader(new MemoryStream(_oldSegmentInfoData), _oldSegmentInfoData.Length);
// prepare writing part
var infoStream= new MemoryStream();
var infoWriter = new EbmlWriter(infoStream);
var writeMap = new[]
{
new {Id = MatroskaDtd.Segment.Info.Title.Identifier, Value = _title},
new {Id = MatroskaDtd.Segment.Info.WritingApp.Identifier, Value = _writingApp},
};
// enter the Segment block
reader.ReadNext();
reader.EnterContainer();
while (reader.ReadNext())
{
if (!writeMap.Any(arg => arg.Id == reader.ElementId))
{
// copying data as is
var buffer = new byte[reader.ElementSize];
reader.ReadBinary(buffer, 0, (int) reader.ElementSize);
infoWriter.Write(reader.ElementId, buffer);
}
}
// write title/app in case it was not present!
foreach (var e in writeMap.Where(arg => !string.IsNullOrEmpty(arg.Value)))
{
infoWriter.WriteUtf(e.Id, e.Value);
}
var outStream = new MemoryStream(_dataLength);
var writer = new EbmlWriter(outStream);
writer.Write(MatroskaDtd.Segment.Info.Identifier, infoStream.ToArray());
var extraByteCount = _dataLength - outStream.Position;
if (extraByteCount != 0)
{
var extraHLen = StandardDtd.Void.Identifier.Length + 2;
var blankDataLen = (int) (extraByteCount - extraHLen);
if (blankDataLen < 0)
{
throw new InvalidOperationException(string.Format("Not enough space to put the new data, {0} bytes to feet", -blankDataLen));
}
writer.WriteElementHeader(StandardDtd.Void.Identifier, VInt.EncodeSize((ulong)blankDataLen, 2));
writer.Write(new byte[blankDataLen], 0, blankDataLen);
}
if (outStream.Length != _dataLength)
throw new InvalidOperationException("Failed to prepare modified data - block length mismatch");
_stream.Position = _dataStart;
_stream.Write(outStream.ToArray(), 0, _dataLength);
}
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);
}
public void ReusesNextFiller()
{
var stream = new MemoryStream();
var writer = new EbmlWriter(stream);
writer.Write(VInt.MakeId(122), 321);
using (var segment = writer.StartMasterElement(MatroskaDtd.Segment.Identifier))
{
using (var segmentInfo = segment.StartMasterElement(MatroskaDtd.Segment.Info.Identifier))
{
segmentInfo.WriteUtf(MatroskaDtd.Segment.Info.Title.Identifier, "Test data");
}
// write some dummy data
segment.Write(StandardDtd.Void.Identifier, new byte[1000]);
segment.Write(VInt.MakeId(123), 123); // marker
}
stream.Position = 0;
// act
var infoReader = new SegmentInfoUpdater();
infoReader.Open(stream);
infoReader.Title = new string('a', 500);
infoReader.Write();
// verify the stream is correct
stream.Position = 0;
var reader = new EbmlReader(stream);
reader.ReadNext();
Assert.AreEqual(122, reader.ElementId.Value, "start marker");
Assert.AreEqual(321, reader.ReadInt());
reader.ReadNext();
Assert.AreEqual(MatroskaDtd.Segment.Identifier, reader.ElementId);
reader.EnterContainer();
reader.ReadNext();
Assert.AreEqual(MatroskaDtd.Segment.Info.Identifier, reader.ElementId);
Assert.Greater(reader.ElementSize, 500);
reader.ReadNext();
Assert.AreEqual(StandardDtd.Void.Identifier, reader.ElementId);
reader.ReadNext();
Assert.AreEqual(123, reader.ElementId.Value, "end data marker");
Assert.AreEqual(123, reader.ReadInt());
}
private void GetMatroskaTags()
{
MatroskaElementDescriptorProvider medp = new MatroskaElementDescriptorProvider();
using (var fs = new FileStream(path + "/" + fullName, FileMode.Open, FileAccess.Read))
using (EbmlReader ebmlReader = new EbmlReader(fs))
{
//Console.WriteLine("--------------" + labelName + "----------------");
var segmentFound = ebmlReader.LocateElement(MatroskaElementDescriptorProvider.Segment);
if (segmentFound)
{
ebmlReader.EnterContainer();
while (ebmlReader.ReadNext())
{
var descriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (descriptor == null) continue;
if (descriptor.Name == "Tracks")
{
ebmlReader.EnterContainer();
while (ebmlReader.ReadNext())
{
var trackDescriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (trackDescriptor == null) continue;
if (trackDescriptor.Name == "TrackEntry")
{
ebmlReader.EnterContainer();
long trackType = 0;
string trackLanguage = null;
while (ebmlReader.ReadNext())
{
var trackEntryDescriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (trackEntryDescriptor == null) continue;
if (trackEntryDescriptor.Name == "Video")
{
ebmlReader.EnterContainer();
while (ebmlReader.ReadNext())
{
var videoDescriptor = medp.GetElementDescriptor(ebmlReader.ElementId);
if (videoDescriptor == null) continue;
if (videoDescriptor.Name == "PixelWidth")
{
width = ebmlReader.ReadInt();
}
else if (videoDescriptor.Name == "PixelHeight")
{
height = ebmlReader.ReadInt();
}
}
ebmlReader.LeaveContainer();
}
else if (trackEntryDescriptor.Name == "TrackType")
{
trackType = ebmlReader.ReadInt();
}
else if (trackEntryDescriptor.Name == "Language")
{
trackLanguage = ebmlReader.ReadUtf();
if (trackType == 0x11) //subtitle
{
listLanguageSubtitle.Add(trackLanguage);
//Console.WriteLine("subtitle : ->" + trackLanguage + "<-");
}
else if (trackType == 2) //audio
{
listLanguageAudio.Add(trackLanguage);
//Console.WriteLine("audio : ->" + trackLanguage + "<-");
}
}
}
ebmlReader.LeaveContainer();
}
}
ebmlReader.LeaveContainer();
break;
}
}
}
}
}
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();
}