On Wed, Nov 16, 2011 at 6:30 PM, Steffen Barszus <steffenbpunkt@xxxxxxxxxxxxxx> wrote: > 2011/11/16 Manu Abraham <abraham.manu@xxxxxxxxx>: >> On Wed, Nov 16, 2011 at 4:38 AM, Klaus Schmidinger >> <Klaus.Schmidinger@xxxxxxx> wrote: >>> >>> That is also my understanding of multi frontend devices. >>> If an "adapter" has several "frontends" only one of them can >>> be active at any given time. This has nothing to do with >>> any "explosives" (excuse the pun ;-) and will be implemented >>> in the core VDR code as time permits. Right now I'm cleaning up >>> the "lnb sharing" (aka "device bonding") stuff and will hopefully >>> find more time for VDR development by the end of the year (and >>> thereafter). >> >> If I am following you correctly, >> There is one issue however. If an adapter can have only a single >> frontend, then there will exist another issue: >> >> - Card has dual multi standard frontend(s). >> - Card has CI cards on both the paths (2 CI controllers) >> - Card provides scrambled stream as well as descrambled stream (4 >> simultaneous streams) >> - Card needs to swap between the CI modules to take advantage of the >> different modules, rather than reconnecting antenna inputs/manually >> swapping the CI modules. >> >> Eventually, to handle such a situation: all the nodes exposed to the >> application has to be under the "same" adapter, rather than as 4 >> different adapters, of which 2 of them won't have any frontend or ca >> devices. > > To my understanding the mentioned use case would have - according to > linux-media project logic of how to handle this - would look like > > /dev/dvb/adapter0/frontend0 > /dev/dvb/adapter0/frontend1 > /dev/dvb/adapter0/demux0 > ... > /dev/dvb/adapter0/ca0 > /dev/dvb/adapter1/frontend0 > /dev/dvb/adapter1/frontend1 > /dev/dvb/adapter1/demux0 > ... > /dev/dvb/adapter1/ca0 > > so it would be 2 adapter with 4 frontends. If for some reason they > should be in one adapter how to distinguish between the different > cases ? Maybe i did not understand properly the issue. The very same driver can have 4 real frontends too. By now the issue got complicated too far by the logic mentioned above: So, how will you distinguish between real functional and independant adapters, then (when having multiple adapters) ? Manu _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
