[linux-dvb] Re: [PATCH] Small fix for stv0299.c

[Andrew de Quincey <adq_dvb@lidskialf.net>]

On Wednesday 12 November 2003 15:32, Johannes Stezenbach wrote:
> Vadim Catana wrote:
> > > Andrew de Quincey wrote:
> > >
> > > Would it not actually be more useful to make it count uncorrected
> > > blocks,
> >
> > as
> >
> > > this is a measure of what people actually will see.. as opposed to
> > > errors which may (or may not) have been corrected.
> >
> > The problem that the patch fixes is that ioctl command FE_READ_BER  is
> > actually returning
> > uncorrected blocks count for samsung tuner and Viterbi bit errors count
> > for other tuners,
> > while FE_READ_UNCORRECTED_BLOCKS returns -EOPNOTSUPP.
> >
> > If uncorrected blocks count is more useful the STV0299 should be
> > initialized accordingly,
> > and the ioctl function fixed. Should I can send a patch ?
>
> FE_READ_BER is more useful for displaying a "signal quality" status
> bar in a GUI. FE_READ_UNCORRECTED_BLOCKS is not suitable for that
> because it stays at 0 until the signal is bad enough and then jumps
> between 0 and some small number.
>
> Too bad the stv0299 cannot do both at the same time.

uncorrected blocks is also very useful for diagnosing problems in transmission 
equipment, (e.g. logging for a long period to look for periodic 
corruption)... maybe we need a way to choose which one should be used... 
perhaps a module parameter?



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