Re: Problems with multifrontend

[Stefan Ringel <mail stefanringel de>]

Am 25.10.2012 09:22, schrieb Sebastian Pölsterl:

Am 25.10.2012 01:32, schrieb Tony Houghton:

On Wed, 24 Oct 2012 23:15:19 +0200
Sebastian Pölsterl <sebp k-d-w org> wrote:

Am 24.10.2012 13:32, schrieb Stefan Ringel:

Hi Sebastian,
Which Linux-DVB-API use you, version 3 or version 5? Use you 
FE_SET-PROPERTY/FE-GET_PROPERTY IOCTL's?

gstreamer's dvbsrc takes care of tuning. Currently it does not use
FE_SET_PROPERTY and FE_GET_PROPERTY. See
http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/sys/dvb/gstdvbsrc.c

If you think that this might the cause of your problem, please file a
bug at https://bugzilla.gnome.org/browse.cgi?product=GStreamer

There is a report/request about using the newer API at
<https://bugzilla.gnome.org/show_bug.cgi?id=654479>. But I don't think
that's the main problem here. I think Stefan's complaint is that
gnome-dvb will only let him use this card for cable, when it should be
usable for terrestrial too. Multi-frontend means the card has one
frontend with multiple capabilities, not separate frontends for each of
C and T.

I see that you already started working on supporting the new API, that's
great.

I don't own any multi-frontend device myself, so it's hard for me to
judge what the problem is. Currently, gstreamer's dvbsrc only supports
specifying the number of the adapter and frontend to use. You are saying
that additional information is required to support multi-frontend devices?

Best regards,
Sebastian

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Hi Sebastian,

The Linux DVB-API v5 has the FE_GET_PROPERTY/FE_SET_PROPERTY mechanism. With DTV_ENUM_DELSYS you can ask which frontend standards it can. With DTV_DELIVERY_SYSTEM you can switch between the delivery systems. The v3 API cannot that. The support of newer delivery systems has only the DVB-API v5.