/// <summary>
/// timer callback.
/// This method is called by a timer every 30 seconds to wake up the epg grabber
/// the epg grabber will check if its time to grab the epg for a channel
/// and ifso it starts the grabbing process
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void _epgTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
//security check, dont allow re-entrancy here
if (_reEntrant)
{
return;
}
try
{
_reEntrant = true;
//if epg grabber is idle, then grab epg for the next channel
if (_state == EpgState.Idle)
{
return;
}
else if (_state == EpgState.Grabbing)
{
//if we are grabbing epg, then check if card is still idle
if (_user.CardId >= 0)
{
if (!IsCardIdle(_user))
{
//not idle? then cancel epg grabbing
if (_state != EpgState.Idle)
{
Log.Epg("EpgCard: Canceled epg, card is not idle:{0}", _user.CardId);
}
_tvController.AbortEPGGrabbing(_user.CardId);
_state = EpgState.Idle;
_user.CardId = -1;
_currentTransponder.InUse = false;
return;
}
}
//wait until grabbing has finished
TimeSpan ts = DateTime.Now - _grabStartTime;
if (ts.TotalMinutes > _epgTimeOut)
{
//epg grabber timed out. Update database and go back to idle mode
Log.Epg("EpgCard: card: {0} timeout after {1} mins", _user.CardId, ts.TotalMinutes);
_tvController.AbortEPGGrabbing(_user.CardId);
Log.Epg("EpgCard: Aborted epg grab");
}
else
{
Log.Epg("EpgCard: allow grabbing for {0} seconds on card {1}", ts.TotalSeconds, _user.CardId);
}
}
}
catch (Exception ex)
{
Log.Error("EpgCard: Error in EPG timer - {0}", ex.ToString());
}
finally
{
_reEntrant = false;
}
}