[FFmpeg-devel] [RFC] support encrypted asf
Reimar Döffinger
Reimar.Doeffinger
Tue Oct 9 10:01:36 CEST 2007
Hello,
On Tue, Oct 09, 2007 at 01:03:57AM +0300, Uoti Urpala wrote:
[...]
> Which also gives the following tableless variant:
>
> static uint32_t inverse3(uint32_t v) {
> uint32_t i;
> i = 2 - v;
> i *= 2 - v * i;
> i *= 2 - v * i;
> i *= 2 - v * i;
> i *= 2 - v * i;
> return i;
> }
Interesting, in case you didn't notice this ended up being a
fixpoint-iteration. I wonder if there is an easy way to prove
convergence in 5 steps in that mindset...
Greetings,
Reimar D?ffinger
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