[vdr] How is cDvbDevice::ProvidesTransponder supposed to work?

[André Weidemann <Andre.Weidemann@web.de>]

Hi,
I have tried to get this working for quite some time. I have found a 
solution but I'm not sure this will be working for all users. For an 
obvious reason cDvbDevice::ProvidesTransponder is always returning "false".

Can someone please enlighten me and explain the "why" of the bit mask 
operations to me?

As far as I could see cSource::st_Mask and cSource::stSat are constants 
and the Diseqcs.Get() method returns always NULL.
The fact is that the only variable in this line is Channel->Source() and 
 on my system it is always staying between 32768 and 65535...
Or can it possibly have higher values if you have a two-card-system?

The main reason I would like this method to work correctly is a possible 
audio pid change during a recording. If a recording has started with 
only one Apid and during the recording a second one is coming in, then 
it won't retune because in vdr.c there is a check implemeted to see 
whether the current DVB card has to be retuned or not. That's where the 
problems with cDvbDevice::ProvidesTransponder starts.

This is the line:
 if (cDevice::ActualDevice()->ProvidesTransponder(Channel)) { // avoids 
retune on devices that don't really access the transponder

I changed it to:
 if 
(cDevice::ActualDevice()->ProvidesTransponder(Channel)||cDevice::NumDevices()==1) 
{ // avoids retune on devices that don't really access the transponder

and on a one-card-system this is working quite well. (Maybe this is 
actually the solution, but I doubt it...)

Can this retune mechanism please be overlooked?
Me and some other people would really appreciate it.

Thank you a lot in advance.

 André.