Hi all, ( Please don't mix this thread with the "DVB-S2 / Multiproto and future modulation support" thread. ) Summary: Some devices provide several tuners, even of different types. So called "Dual" or "Twin" tuners can be used at the same time. Some others (like HVR4000) can't be used at the same time. My initial question was: How could an application know that 2 (or more) tuners are exclusive (when one is used the other(s) is(are) not free.) I suggested the following: Since actually all multiple tuners drivers expose several fontend0 in separate adapters, maybe a solution for exclusive tuners could be to have : - adapter0/frontend0 -> S/S2 tuner - adapter0/frontend1 -> T tuner so, an application could assume that these tuners are exclusive. Janne Grunau acked the idea and said that an experimental driver for HVR4000 is already doing this. This was confirmed by Steven Toth: "Correct, frontend1, demux1, dvr1 etc. All on the same adapter. The driver and multi-frontend patches manage exclusive access to the single internal resource." Andreas Oberritter said: "This way is used on dual and quad tuner Dreambox models." (non exclusive tuners). "How about dropping demux1 and dvr1 for this adapter (exclusive tuners), since they don't create any benefit? IMHO the number of demux devices should always equal the number of simultaneously usable transport stream inputs." Uri Shkolnik said: "Some of the hardware devices which using our chipset have two tuners per instance, and should expose 1-2 tuners with 0-2 demux (TS), since not all DTV standard are TS based, and when they are (TS based), it depends when you are using two given tuners together (diversity mode, same content) or each one is used separately (different frequency and modulation, different content, etc.)." So, here are my questions: @Steven Toth: What do you think of Andreas' suggestion? Do you think it could be done that way for HVR4000 (and 3000?) ? @Uri Shkolnik: Do you mean that non-TS based standards don't make use of multiplexing at all? -- Christophe Thommeret _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
