[vdr] [PATCH] time warp

Stefan Huelswitt s.huelswitt at gmx.de
Wed Jun 22 17:11:07 CEST 2005


On 22 Jun 2005 Rainer Zocholl <UseNet-Posting-Nospam-74308- at zocki.toppoint.de> wrote:
> udo_richter at gmx.de(Udo Richter)  19.06.05 16:40
> 
> 
>>Klaus Schmidinger wrote:
>>> Isn't all that data protected by CRC32 checksums?
>>> How could "garbage" get in there?
>>>
>>> Maybe somebody should try to find out why that "garbage"
>>> is produced in the first place...
> 
>>I've seen this - though at least one year ago - with bad reception due
>>to bad weather. For half an hour, the system time was jumping back and
>>forward like crazy, starting and stopping some timers. Luckily, all
>>timers were repeating, so none of them was gone after reception was
>>back.
> 
> So: Who is doing the CRC checks? 

If CRC checking is enabled on dmx-filter setup
(dmx_sct_filter_params.flags |= DMX_CKECK_CRC), the driver does
it for you.

VDR doesn't enables the check. This would be difficult, as not
all tables are CRC protected.

Regards.

-- 
Stefan Huelswitt
s.huelswitt at gmx.de  | http://www.muempf.de/



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