public static ShortEventDescriptor Parse(byte[] bytes)
{
var res = new ShortEventDescriptor();
res.Tag = bytes[0];
res.Length = bytes[1];
res.LanguageCode = Encoding.GetEncoding("iso-8859-1").GetString(bytes, 2, 3);
var eventNameLength = bytes[5];
var pos = 6;
res.EventName = MPEGTSCharReader.ReadString(bytes, pos, eventNameLength, true);
pos = pos + eventNameLength;
var textLength = bytes[pos];
pos++;
res.Text = MPEGTSCharReader.ReadString(bytes, pos, textLength, true);
return(res);
}
public static EventItem Create(int eventId, int serviceId, DateTime start, DateTime finish, ShortEventDescriptor shortEventDescriptor)
{
var res = new EventItem();
res.EventId = eventId;
res.ServiceId = serviceId;
res.StartTime = start;
res.FinishTime = finish;
res.LanguageCode = shortEventDescriptor.LanguageCode;
res.EventName = shortEventDescriptor.EventName;
res.Text = shortEventDescriptor.Text;
return(res);
}
public override void Parse(List <byte> bytes)
{
if (bytes == null || bytes.Count < 5)
{
return;
}
var pointerFiled = bytes[0];
var pos = 1;
if (pointerFiled != 0)
{
pos = pos + pointerFiled + 1;
}
if (bytes.Count < pos + 2)
{
return;
}
ID = bytes[pos];
SectionSyntaxIndicator = ((bytes[pos + 1] & 128) == 128);
Private = ((bytes[pos + 1] & 64) == 64);
Reserved = Convert.ToByte((bytes[pos + 1] & 48) >> 4);
SectionLength = Convert.ToInt32(((bytes[pos + 1] & 15) << 8) + bytes[pos + 2]);
Data = new byte[SectionLength];
CRC = new byte[4];
//if (!DVBTTable.CRCIsValid(1,1))
//{
// return null;
//}
if (bytes.Count < SectionLength + 4)
{
throw new IndexOutOfRangeException();
}
bytes.CopyTo(0, Data, 0, SectionLength);
bytes.CopyTo(SectionLength, CRC, 0, 4);
pos = pos + 3;
ServiceId = (bytes[pos + 0] << 8) + bytes[pos + 1];
Version = Convert.ToByte((bytes[pos + 2] & 62) >> 1);
CurrentIndicator = (bytes[pos + 2] & 1) == 1;
SectionNumber = bytes[pos + 3];
LastSectionNumber = bytes[pos + 4];
pos = pos + 5;
TransportStreamID = (bytes[pos + 0] << 8) + bytes[pos + 1];
OriginalNetworkID = (bytes[pos + 2] << 8) + bytes[pos + 3];
pos = pos + 4;
SegmentLastSectionNumber = bytes[pos + 0];
LastTableID = bytes[pos + 1];
pos = pos + 2;
// pointer + table id + sect.length + descriptors - crc
var posAfterDescriptors = 4 + SectionLength - 4;
// reading descriptors
while (pos < posAfterDescriptors)
{
var eventId = (bytes[pos + 0] << 8) + bytes[pos + 1];
pos = pos + 2;
var startTime = ParseTime(bytes, pos);
pos = pos + 5;
var duration = ParseDuration(bytes, pos);
var finishTime = startTime.AddSeconds(duration);
pos = pos + 3;
var running_status = (bytes[pos + 0] & 224) >> 5;
var freeCAMode = (bytes[pos + 0] & 16) >> 4;
var descriptorLength = ((bytes[pos + 0] & 15) << 8) + bytes[pos + 1];
pos = pos + 2;
var descriptorData = new byte[descriptorLength];
bytes.CopyTo(pos, descriptorData, 0, descriptorLength);
var descriptorTag = descriptorData[0];
if (descriptorTag == 77)
{
var shortDescriptor = ShortEventDescriptor.Parse(descriptorData);
var eventItem = EventItem.Create(eventId, ServiceId, startTime, finishTime, shortDescriptor);
EventItems.Add(eventItem);
}
else
{
// TODO: read other descriptors
}
pos = pos + descriptorLength;
}
}
