[vlc-devel] dvb: one demux per tuner or one demux per demod?
rjkm at metzlerbros.de
Tue May 24 17:53:19 CEST 2011
Antti Palosaari writes:
> > This is one of the big things that S2API fixes (through S2API you can
> > specify the modulation that you want). Do we really want to be
> > advertising two frontends that point to the same demod, when they
> > cannot be used in parallel? This seems doomed to create problems with
> > applications not knowing that they are in fact the same frontend.
> I was in understanding it is MFE when there is multiple frontends in
> same adapter. In that case only one adapter can be used at time. I added
> lock to cxd2820r driver, which probably is in wrong place (I think it
> should be interface-driver or core which locks).
> > I'm tempted to say that this patch should be scapped and we should
> > simply say that you cannot use DVB-C on this device unless you are
> > using S2API. That would certainly be cleaner but it comes at the cost
> > of DVB-C not working with tools that haven't been converted over to
> > S2API yet.
See the discussion on this list a few weeks ago.
Having one frontend with DVB-C/T or even DVB-S/C/T (there are
such demods) is currently NOT supported with the S2API, mainly because
delivery systems cannot be queried.
Andreas Oberritter proposed a way (see his mail on May 6th) to do this
with a new DTV_DELIVERY_SYSTEMS property.
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