[linux-dvb] Multiple frontends on a single adapter support

Andreas Oberritter obi at linuxtv.org
Thu Sep 11 17:16:12 CEST 2008

Christophe Thommeret wrote:
> 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?

I guess diversity mode should be transparent to the user, so such a
device would register only one frontend (and thus only one demux) per
set of tuners used in diversity mode.

While your statements about non-TS based standards make sense, those
standards would require further work to be covered by a future API. In
this special case, however, we're discussing correct usage of the
current (TS based) demux API.


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