private void Setup(TsDecoder.TransportStream.TsDecoder tsDecoder)
{
if (tsDecoder == null || _currentTeletextDescriptor != null) return;
lock (tsDecoder)
{
if (ProgramNumber == 0)
{
var pmt = tsDecoder.GetSelectedPmt(ProgramNumber);
if (pmt != null)
{
ProgramNumber = pmt.ProgramNumber;
}
}
if (ProgramNumber == 0) return;
var esStream = tsDecoder.GetEsStreamForProgramNumberByTag(ProgramNumber, 0x6, 0x56);
_currentTeletextDescriptor =
tsDecoder.GetDescriptorForProgramNumberByTag<TeletextDescriptor>(ProgramNumber, 6, 0x56);
if (_currentTeletextDescriptor == null) return;
foreach (var lang in _currentTeletextDescriptor.Languages)
{
// if (lang.TeletextType != 0x02 && lang.TeletextType != 0x05)
// continue;
TeletextPid = esStream.ElementaryPid;
if (_teletextSubtitlePage == null)
{
_teletextSubtitlePage = new Dictionary<ushort, TeleText>();
}
var m = lang.TeletextMagazineNumber;
if (lang.TeletextMagazineNumber == 0)
{
m = 8;
}
var page = (ushort)((m << 8) + lang.TeletextPageNumber);
if (_teletextSubtitlePage.ContainsKey(page)) continue;
_teletextSubtitlePage.Add(page, new TeleText(page, TeletextPid));
_teletextSubtitlePage[page].TeletextPageRecieved += TeleTextDecoder_TeletextPageRecieved;
}
}
}
public void AddPacket(TsDecoder.TransportStream.TsDecoder tsDecoder, TsPacket tsPacket)
{
if (_currentTeletextDescriptor == null)
{
Setup(tsDecoder);
if (_currentTeletextDescriptor != null)
{
Debug.WriteLine($"Locked onto teletext PID for {TeletextPid} ");
}
}
if (tsPacket.Pid != TeletextPid) return;
if (tsPacket.PayloadUnitStartIndicator)
{
if (_currentTeletextPes != null)
{
if (_currentTeletextPes.HasAllBytes())
{
_currentTeletextPes.Decode();
foreach (var key in _teletextSubtitlePage.Keys)
{
_teletextSubtitlePage[key].DecodeTeletextData(_currentTeletextPes);
}
}
}
_currentTeletextPes = new Pes(tsPacket);
}
else
{
_currentTeletextPes?.Add(tsPacket);
}
}
