private void ReadCreateSegmentInfo(EBMLreader element, EBMLelement ebml_sinfo)
{
ulong i = 0;
while (i < element.DataSize)
{
var child = new EBMLreader(element, element.DataOffset + i);
var matroska_id = child.ID;
switch (matroska_id)
{
case MatroskaID.Duration:
duration_unscaled = child.ReadDouble();
if (time_scale > 0)
{
duration = TimeSpan.FromMilliseconds(duration_unscaled * time_scale / 1000000);
}
break;
case MatroskaID.TimeCodeScale:
time_scale = child.ReadULong();
if (duration_unscaled > 0)
{
duration = TimeSpan.FromMilliseconds(duration_unscaled * time_scale / 1000000);
}
break;
case MatroskaID.Title:
break;
}
i += child.Size;
}
}
private void ReadWriteSegment(EBMLreader element, ReadStyle propertiesStyle, bool retry = true)
{
// First make reference of all EBML elements at level 1 (top) in the Segment
var segm_list = ReadSegments(element, retry); // Try to get it from SeekHead the first time (way faster)
// Now process (read and prepare to write) the referenced elements we care about
EBMLelement ebml_sinfo = null;
var valid = true;
foreach (var child in segm_list)
{
// the child here may be Abstract if it has been retrieved in the SeekHead,
// so child.Read() must be used to retrieve the full EBML header
var matroska_id = child.ID;
switch (matroska_id)
{
case MatroskaID.SeekHead:
valid = child.Read();
break;
case MatroskaID.SegmentInfo:
if (valid = child.Read())
{
ReadCreateSegmentInfo(child, ebml_sinfo);
}
break;
case MatroskaID.Tracks:
if ((propertiesStyle & ReadStyle.Average) != 0)
{
if (valid = child.Read())
{
ReadTracks(child);
}
}
break;
case MatroskaID.Tags:
valid = child.Read();
break;
case MatroskaID.Attachments:
valid = child.Read();
if (valid)
{
ReadAttachments(child, propertiesStyle);
}
break;
case MatroskaID.CRC32: // We don't support it
valid = child.Read();
break;
}
if (!valid)
{
break;
}
}
// Detect invalid SeekHead
if (!valid)
{
if (retry)
{
MarkAsCorrupt("Invalid Meta Seek");
// Retry it one last time
ReadWriteSegment(element, propertiesStyle, false);
}
else
{
MarkAsCorrupt("Invalid EBML element Read");
}
}
}
