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Code Issues Releases Wiki Activity

Improved working around the broken driver values for SNR in case of a "TT-budget S2-3200" receiving DVB-S2

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Klaus Schmidinger 2013-02-19 12:16:42 +01:00
parent 851318c9b4
commit 8260adafc2
2 changed files with 12 additions and 3 deletions
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2
HISTORY
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@ -7659,3 +7659,5 @@ Video Disk Recorder Revision History
menu (reported by Juergen Lock).
- Fixed a possible deadlock in handling the tuners of bonded devices (thanks to
Juergen Lock).
- Improved working around the broken driver values for SNR in case of a "TT-budget
S2-3200" receiving DVB-S2.

13
dvbdevice.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbdevice.c 2.81 2013/02/19 10:24:39 kls Exp $
* $Id: dvbdevice.c 2.82 2013/02/19 11:55:00 kls Exp $
*/
#include "dvbdevice.h"
@ -621,15 +621,22 @@ int cDvbTuner::GetSignalQuality(void) const
break;
}
}
uint16_t MinSnr = 0x0000;
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 0x13C21019: if (frontendType == SYS_DVBS2) { // TT-budget S2-3200 (DVB-S/DVB-S2)
MinSnr = 10;
MaxSnr = 70;
}
else
MaxSnr = 200;
break;
case 0x20130245: // PCTV Systems PCTV 73ESE
case 0x2013024F: MaxSnr = 255; break; // PCTV Systems nanoStick T2 290e
}
int a = int(Snr) * 100 / MaxSnr;
int a = int(constrain(Snr, MinSnr, MaxSnr)) * 100 / (MaxSnr - MinSnr);
int b = 100 - (Unc * 10 + (Ber / 256) * 5);
if (b < 0)
b = 0;