/// <summary>
/// Writes this object into the data stream at the current position. Note that this method
/// reverses some spacefor further additions in the stream,
/// if the stream is seekable. Following subsequent additions to the object, the update()
/// method can be used to update the originally written object.
/// </summary>
/// <param name="writer">FileStream to write to.</param>
/// <returns>Length of data written</returns>
public ulong Write(FileStream writer)
{
ulong elementLength = seekHeadElem.WriteElement(writer);
ulong voidLength = placeHolderElement.WriteElement(writer);
if (elementLength + voidLength != BLOCK_RESEVER_SIZE)
{
throw new Exception("ElementLength + VoidLength != Reserved size. Something went wrong");
}
return(BLOCK_RESEVER_SIZE);
}
public Element Write(FileStream writer, MatroskaFileMetaSeek metaSeek)
{
ulong currentbytePositionInFile = (ulong)writer.Position;
Utility.LogDebug($"Writing matroska cues at file byte position [{currentbytePositionInFile}]");
ulong numberOfBytesInCueData = cues.WriteElement(writer);
Utility.LogDebug($"Done writing matroska cues, number of bytes was [{numberOfBytesInCueData}]");
metaSeek.AddIndexedElement(cues, getPositionRelativeToSegmentEbmlElement(currentbytePositionInFile));
return(cues);
}
public ulong WriteTracks(FileStream writer)
{
MasterElement trackElements = MatroskaDocTypes.Tracks.GetInstance();
foreach (var track in tracks)
{
trackElements.AddChildElement(track.ToElement());
}
trackElements.WriteElement(writer);
if (BLOCK_SIZE < trackElements.TotalSize)
{
throw new Exception("BLOCK_SIZE was greater than the track element. Something went wrong.");
}
new VoidElement(BLOCK_SIZE - trackElements.TotalSize).WriteElement(writer);
return(BLOCK_SIZE);
}
private void writeEBMLHeader()
{
MasterElement ebmlHeaderElement = MatroskaDocTypes.EBML.GetInstance();
UnsignedIntegerElement ebmlVersionElement = MatroskaDocTypes.EBMLVersion.GetInstance();
ebmlVersionElement.Value = 1;
UnsignedIntegerElement ebmlReadVersionElement = MatroskaDocTypes.EBMLReadVersion.GetInstance();
ebmlReadVersionElement.Value = 1;
UnsignedIntegerElement ebmlMaxIdLengthElement = MatroskaDocTypes.EBMLMaxIDLength.GetInstance();
ebmlMaxIdLengthElement.Value = 4;
UnsignedIntegerElement ebmlMaxSizeLengthElement = MatroskaDocTypes.EBMLMaxSizeLength.GetInstance();
ebmlMaxSizeLengthElement.Value = 8;
StringElement docTypeElement = MatroskaDocTypes.DocType.GetInstance();
docTypeElement.Value = "matroska";
UnsignedIntegerElement docTypeVersionElement = MatroskaDocTypes.DocTypeVersion.GetInstance();
docTypeVersionElement.Value = 3;
UnsignedIntegerElement docTypeReadVersionElement = MatroskaDocTypes.DocTypeReadVersion.GetInstance();
docTypeReadVersionElement.Value = 2;
ebmlHeaderElement.AddChildElement(ebmlVersionElement);
ebmlHeaderElement.AddChildElement(ebmlReadVersionElement);
ebmlHeaderElement.AddChildElement(ebmlMaxIdLengthElement);
ebmlHeaderElement.AddChildElement(ebmlMaxSizeLengthElement);
ebmlHeaderElement.AddChildElement(docTypeElement);
ebmlHeaderElement.AddChildElement(docTypeVersionElement);
ebmlHeaderElement.AddChildElement(docTypeReadVersionElement);
ebmlHeaderElement.WriteElement(Writer);
}
public long WriteElement(FileStream writer)
{
MasterElement segmentInfoElement = MatroskaDocTypes.Info.GetInstance();
StringElement writingAppElement = MatroskaDocTypes.WritingApp.GetInstance();
writingAppElement.Value = "Matroska File Writer v1.0 C#";
StringElement muxingAppElement = MatroskaDocTypes.MuxingApp.GetInstance();
muxingAppElement.Value = ".NET EBML v1.0";
DateElement dateElement = MatroskaDocTypes.DateUTC.GetInstance();
dateElement.Date = SegmentDate;
UnsignedIntegerElement timecodeScaleElement = MatroskaDocTypes.TimecodeScale.GetInstance();
timecodeScaleElement.Value = TimecodeScale;
segmentInfoElement.AddChildElement(dateElement);
segmentInfoElement.AddChildElement(timecodeScaleElement);
if (Duration != null)
{
FloatElement durationElement = MatroskaDocTypes.Duration.GetInstance();
durationElement.Value = (double)Duration;
segmentInfoElement.AddChildElement(durationElement);
}
segmentInfoElement.AddChildElement(writingAppElement);
segmentInfoElement.AddChildElement(muxingAppElement);
ulong len = segmentInfoElement.WriteElement(writer);
VoidElement spacer = new VoidElement((ulong)BLOCK_SIZE - len);
spacer.WriteElement(writer);
return(1);
}
public ulong Flush(FileStream writer)
{
if (frames.Count == 0)
{
return(0);
}
try
{
MasterElement clusterElement = MatroskaDocTypes.Cluster.GetInstance();
UnsignedIntegerElement timecodeElement = MatroskaDocTypes.Timecode.GetInstance();
timecodeElement.Value = ClusterTimecode;
clusterElement.AddChildElement(timecodeElement);
if (silencedTracks.Count != 0)
{
MasterElement silentElement = MatroskaDocTypes.SilentTracks.GetInstance();
foreach (ulong silent in silencedTracks)
{
UnsignedIntegerElement silentTrackElement = MatroskaDocTypes.SilentTrackNumber.GetInstance();
silentTrackElement.Value = silent;
silentElement.AddChildElement(silentTrackElement);
}
clusterElement.AddChildElement(silentElement);
}
MatroskaSimpleBlock block = null;
bool forceNew = true;
ulong lastTimecode = 0;
int lastTrackNumber = 0;
foreach (var frame in frames)
{
frame.Timecode -= ClusterTimecode;
if (forceNew || lastTimecode != frame.Timecode || lastTrackNumber != frame.TrackNumber)
{
if (block != null)
{
clusterElement.AddChildElement(block.ToElement());
}
block = new MatroskaSimpleBlock();
}
lastTimecode = frame.Timecode;
lastTrackNumber = frame.TrackNumber;
forceNew = true;
block.AddFrame(frame);
}
if (block != null)
{
clusterElement.AddChildElement(block.ToElement());
}
return(clusterElement.WriteElement(writer));
}
finally
{
frames.Clear();
Tracks.Clear();
totalSize = 0;
ClusterTimecode = ulong.MaxValue;
}
}