-------- Original-Nachricht -------- > Datum: Wed, 10 Sep 2008 17:10:19 +0200 > Von: Christophe Thommeret <hftom@xxxxxxx> > An: Steven Toth <stoth@xxxxxxxxxxxxx> > CC: linux-dvb@xxxxxxxxxxx > Betreff: Re: DVB-S2 / Multiproto and future modulation support > Le Wednesday 10 September 2008 15:38:23 Steven Toth, vous avez écrit : > > > Is this card able to deliver both S and T at the same time? > > > > No, the hardware can do S/S2 or T. > > > The driver in the S2API tree only has S/S2 enabled (for the time being). > > So, maybe we have to think a bit about how to add support for this kind of > device. Yes, absolutely, and I hope this can go in to S2API and the kernel. It would be a lie to claim that linux supports the HVR4000 until this is done. Fortunately Steven and Darron made experimental drivers which do this. > I mean, if the driver provides different adapters/frontends (say > adapter0/frontend0 and adapter1/frontend0), a typical application will see > these as separate devices, and then when a user watch a S channel, the app > assumes that the T frontend is free while in fact it's not. > For example, Kaffeine updates its channels list according to which > channels > can be viewed (based on which frontends are free). So, if you are > recording a > S channel, all channels on this freq are shown as available and all T > channels are also shown as available. But in the HVR4000 case, it's false, > since the T tuner isn't free. > > Maybe a solution could be to have : > - adapter0/frontend0 -> S/S2 tuner > - adapter0/frontend1 -> T tuner This is what the multifrontend (mfe) driver at http://dev.kewl.org/hauppauge does. And Kaffeine is the only major DVB app which correctly finds the two frontends and uses them correctly (well done!!). Or very nearly -- TV watching is perfect, but the only slight problem happens when you are recording: (1) record a DVB-T channel: -->all DVB-T channels except those in same multiplex vanish from the available channels list (correct) -->no satellite channels vanish (incorrect) (2) record a DVB-S channel; -->all DVB-S channels except those on the same multiplex vanish from the available channels list (correct) -->no DVB-T channels vanish (incorrect) It's a small problem, easily fixed I would think. > > So applications could know that these 2 frontends are exclusive. > That would not require any API change, but would have to be a rule > followed by > all drivers. Yes, if we keep to that rule then only frontends which can operate truly simultaneously should have a different adapter number. Regards, Hans -- Release early, release often. Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
