[linux-dvb] Re: CRC32 errors in sections

[Johannes Stezenbach <js@convergence.de>]

On Fri, Mar 14, 2003 at 07:35:48PM +0100, Ralph Metzler wrote:
> Johannes Stezenbach writes:
>  > On Fri, Mar 14, 2003 at 12:40:17PM -0500, Jeremy Hall wrote:
> [...]
>  > The reason that it's broken now is that the AV7110 has hardware for the
>  > CRC check, but no one got around implementing the check in the
>  > firmware. Or maybe the Metzlers tried and it didn't work. Anyway, it's
>  > simpler to implement it on the PC now. If someone sometime implements
>  > it in the firmware, the check on the PC can be eleminated...
> 
> As far as I can see you are all using the firmware in TS mode since
> last October or so. Thus, all problems with section filtering 
> which you blame on the firmware are purely psychosomatic. 
> The data path (including CRC checking) is exactly the same as in the 
> case of the Nova cards.

AFAICS for dvbdmxfilter->type==DMX_TYPE_SEC mode is always 4.
Except now with Andreas Oberritter's hw_sections patch it uses
mode 0xb96a.

The interesting question for me is if the CRC checking hardware
of the AV7110 is not used because you know that it doesn't work,
or because you just never tried to use it?

Johannes


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