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

Steve Kerrison steve at stevekerrison.com
Tue May 24 14:05:34 CEST 2011

Hi Rémi,

The cxd2820r supports DVB-T/T2 and also DVB-C. As such antti coded up a
multiple front end (MFE) implementation for em28xx then attaches the
cxd2820r in both modes.

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?

But I'm new at this, so forgive me if I've overlooked something or
misunderstood the issue you've raised.

Steve Kerrison MEng Hons.

On Tue, 2011-05-24 at 12:55 +0200, Rémi Denis-Courmont wrote:
> Hello,
> Been testing the bleeding-edge Hauppauge 290E (em28174 + Sony cxd2820r)
> from Antti Palosaari and Steve Kerrison, now in linux-media GIT tree.
> It seems the device creates two frontends and only one demux/dvr nodes.
> Are they not supposed to be one demux per frontend? Or how is user-space
> supposed to map the demux/dvr and the frontend, on a multi-proto card? on a
> multi-tuner card?
> Best regards,

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