[linux-dvb] Re: STV0299

[Holger Waechtler <holger@convergence.de>]

Vidya Srinivas wrote:
> Hi,
>
> According to the universal driver for STV0299 obtained from this site,
>
> 	s32 snr = 0xffff - ((stv0299_readreg (i2c, 0x24) << 8)
>                   		                 | stv0299_readreg (i2c, 0x25));
>                 	snr = 3 * (snr - 0xa100);
>                 	*((u16*) arg) = (snr > 0xffff) ? 0xffff :
>                   (snr < 0) ? 0 : snr;
>
> Is this according to any formula? Please help me out.
it's just a heuristic to get the SNR values into the useful 
0x0000...0xffff range.

Holger



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