[vlc-devel] [vlc-commits] dvb: use NIT-info from first found channel to scan rest of the channels

[Ilkka Ollakka]

On Thu, Mar 17, 2011 at 02:24:29PM +0100, Ilkka Ollakka wrote:
> vlc | branch: master | Ilkka Ollakka <ileoo at videolan.org> | Thu Mar 17 14:12:27 2011 +0200| [63e0c6d7453ce1f9cda68204f09585037dd18724] | committer: Ilkka Ollakka

> dvb: use NIT-info from first found channel to scan rest of the channels

> Speeds up channel scanning and actually should find all channels
> without exhaustive scanning.

Some benchmarks, with just naivie NIT-scanning, it takes ~7-10min to
find channels (time is spend on iterating modulations/symbolrates). With
modulation/symbolrate optimisation, I get all channels in under 2min.

Without NIT-scanning iirc scanning time is somewhere closer to 20min and
it doesn't find all the channels as it assumes all channels use same
modulation/symbolrates (without it, I assume it would take hours).


-- 
Ilkka Ollakka
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