[vdr] adjust range of snr bar at bottom of vdr screen?

Klaus Schmidinger Klaus.Schmidinger at tvdr.de
Sun Dec 30 10:41:48 CET 2012


On 30.12.2012 10:15, cedric.dewijs at telfort.nl wrote:
>
>> Please send me a proper patch if you have any success with this.
>>
>> Klaus
>>
> Hi Klaus,
>
> I have not yet tested this, but the below code should work. I assume the
> receiver has a snr of 0x0000 to 0x00ff based on the following datapoints:
> 0x0080 almost never lock, unwatchable
> 0x0090 almost always lock, lots of disturbances
> 0x00A0 always lock, almost never disturbances
> 0x00D0 best signal ever received.
>
> $ lsusb
> Bus 001 Device 004: ID 2013:0245 PCTV Systems PCTV 73ESE
>
> uint16_t MaxSnr = 0xFFFF; // Let's assume the default is using the entire
> range.
> // Use the subsystemId to identify individual devices in case they need
> // special treatment to map their Snr value into the range 0...0xFFFF.
> switch (subsystemId) {
> 	case 0x13C21019: MaxSnr = 200; break; // TT-budget S2-3200 (DVB-S/DVB-S2)
> 	case 0x20130245: MaxSnr = 0x00ff; break; //PCTV Systems PCTV 73ESE
>         }
>         int a = int(Snr) * 100 / MaxSnr;
>         int b = 100 - (Unc * 10 + (Ber / 256) * 5);
>
> Sorry for not sending a proper patch as requested, I have not yet found the
> time to test it properly.

No problem, I can easily insert this one-liner ;-).

Are you sure about the "subsystemId"? IIRC somebody claimed that these don't
apply to USB devices (which yours apparently is, since you did an "lsusb").
Just wondering...

Klaus



More information about the vdr mailing list