[linux-dvb] Re: Using the CRC field of received data

[Johannes Stezenbach <js@convergence.de>]

Klaus Schmidinger wrote:
> 
> Regis Bossut wrote:
> >
> > I noticed that nobody uses the CRC field in order to check the validity of received data (especially EIT infos). So I added it to my own developments on MultiDec but it should be straightforward to adapt it to other developments. As the code is quite short, I join it here. Justed tested on EIT data, but should be the same for other CRC-checked data.
> 
> Thanks, I'll see to implement this in VDR's EIT code this weekend (hopefully...).

DVB/libdvb/src/si/crc32.[ch] also contains source for the crc function.

And the new API has a flag DMX_CHECK_CRC for the section filter
(the AV7110 has hardware support for CRC checking, so the CRC
check must be done in the driver to use it; last time I checked
it was unimplemented, though).

Johannes


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