[linux-dvb] Re: C/A routing Question

[Johannes Stezenbach <js@convergence.de>]

Rob.McConnell@Zarlink.Com wrote:

(I edited quoting for clarity)

> >       4) Whether to match TS packets with the payload unit start indicator
> > set (after which all packets would be matched).
> 
> For point 4, the h/w that I am using does allow the capability to discard
> all packets until the PUSI flag is found in a TS header (after which all TS
> packets are matched).  This feature just reduces the amount of packets to
> handle/copy/parse etc.   For h/w that didn't implement it, it would
> probably be best to implement it in kernel space.  In this way, a user
> space process that opened up a fd for a filter on a SI table would get back
> the complete 1024 or 4096 bytes of the section table without having to
> worry about any additional parsing.

That's what section filters (DMX_SET_FILTER, struct
dmx_sct_filter_params) are for. If the hardware doesn't do section
filters, there's already a software emulation present.


Regards,
Johannes


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