[vlc-devel] dvb: one demux per tuner or one demux per demod?

Rémi Denis-Courmont remi at remlab.net
Tue May 24 17:59:54 CEST 2011


----- Message d'origine -----
> I believe you can only use one frontend at once per adapter (this is
> certainly enforced in the cxd2820r module), so I don't see how it would
> cause a problem for mappings. I think a dual tuner device would register
> itself as two adapters, wouldn't it?

That would be one scheme: there would only ever be one demux per adapter then. But from archives of this very mailing list, I gather that say HVR 3000 shows up as two frontends (DVB-T and DVB-S) with a demux each... Not consistent if true (I do not have such a device to check).

For seamless setup in userspace, I need a consistent mapping scheme, whatever that is. Ideally, I would be able to distinguish multiproto frontends from dual tuners from dual tuners with dual antenna. At the very least, I need a way to find the demux that corresponds to a frontend. And until DMX_OUT_TSDEMUX_TAP works correctly, to a dvr.

Otherwise, user needs to configure frontend AND demux, which is really unfriendly and error-prone.


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