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/******************************************************************************
* w_scan_cpp - a dtv channel scanner based on VDR (www.tvdr.de) and it's
* Plugins.
*
* See the README file for copyright information and how to reach the author.
*****************************************************************************/
#include "Helpers.h"
#include "Femon.h"
#include "CmdOpts.h"
/*******************************************************************************
* class cData, a dummy receiver.
******************************************************************************/
class cData : public cReceiver, cThread {
private:
protected:
virtual void Activate(bool On);
virtual void Receive(const uchar* Data, int Length);
virtual void Action(void);
public:
cData();
virtual ~cData() { cReceiver::Detach(); };
};
cData::cData() : cReceiver(NULL, 99), cThread("cData") { }
void cData::Receive(const uchar* Data, int Length) {
(void)Data;
(void)Length;
}
void cData::Action(void) {
while(Running())
mSleep(100);
};
void cData::Activate(bool On) {
if (On) Start();
else Cancel(0);
};
/*******************************************************************************
* signal strength hints
******************************************************************************/
std::string StrengthHint(cChannel& Channel, double Strength) {
std::string s;
double min = -1e9, max = 1e9;
char src = Channel.Source() >> 24;
int mod = cDvbTransponderParameters(Channel.Parameters()).Modulation();
int sys = cDvbTransponderParameters(Channel.Parameters()).System();
switch(src) {
case 'A':
break;
case 'C': {
switch(mod) {
case 3: /* M64 */ min = 47, max = 67; break;
case 4: /* M128 */ min = 51, max = 71; break;
case 5: /* M256 */ min = 54, max = 74; break;
default:;
}
}
break;
case 'S':
min = 47, max = 77; /* any */
break;
case 'T':
if (sys == 0)
switch(mod) {
case 0: /* M4 */ min = 33, max = 74; break;
case 1: /* M16 */ min = 36, max = 74; break;
case 3: /* M64 */ min = 45, max = 74; break;
default:;
}
else
switch(mod) {
case 0: /* M4 */ min = 33, max = 74; break;
case 1: /* M16 */ min = 35, max = 74; break;
case 3: /* M64 */ min = 39, max = 74; break;
case 5: /* M256 */ min = 43, max = 74; break;
default:;
}
break;
default:;
}
return Strength < min ? "(too low)" :
Strength > max ? "(too high)" :
Strength < (min + 6) ? "(a bit low)" :
Strength > (max -3) ? "(a bit high)" :
"";
}
/*******************************************************************************
* SignalMonitor(), print femon-like signal stats.
******************************************************************************/
static const int strength_available = 0x01;
static const int cnr_available = 0x02;
static const int ber_available = 0x08;
static const int status_available = 0x20;
int SignalMonitor(cDevice* Device, std::string& Channel) {
if (Device == nullptr) {
ErrorMessage("No Device");
return -1;
}
cChannel aChannel;
if (not aChannel.Parse(Channel.c_str())) {
ErrorMessage("Invalid Channel: '" + Channel + "'");
return -1;
}
if (*Device->DeviceName() != nullptr)
Message("monitoring device '" + std::string(*Device->DeviceName()) + "'");
for(;;) {
if (not Device->SwitchChannel(&aChannel, false)) {
Message("tuning failed - try again..");
mSleep(1000);
continue;
}
cData* data = new cData();
Device->AttachReceiver(data);
for(;;) {
double SignalLevel_dBm, CNR_dB, BER;
int result = 0, DemodState, i, SignalLevel_rel;
bool HasLock;
std::string s;
if (not Device->SignalStats(result, &SignalLevel_dBm, &CNR_dB, nullptr, &BER, nullptr, &DemodState))
result = 0;
HasLock = (result & status_available ) ? (DemodState & 0x10) > 0 : Device->HasLock();
SignalLevel_rel = (result & strength_available) ? 0 : Device->SignalStrength();
if (satip) {
/* Bug in satip plugin, plugin reports "no signal" as -71.67dBm,
* where it should be "no signal" (not to be reported),
* see https://github.com/rofafor/vdr-plugin-satip/issues/80
*/
if (SignalLevel_dBm < -71.5)
result &= ~strength_available;
/* Bug in satip plugin, plugin initializes tuners cached dBm value
* to 0.0dBm (a very large value in terms of signal),
* see https://github.com/rofafor/vdr-plugin-satip/issues/80
*/
if (SignalLevel_dBm > -18.5)
result &= ~strength_available;
}
if (HasLock)
s = "lock 1 | ";
else
s = "lock 0 | ";
if (result & strength_available)
s += "signal " + FloatToStr(SignalLevel_dBm + 108.75, 5, 2, false) + "dBuV " +
StrengthHint(aChannel, SignalLevel_dBm + 108.75) + " | ";
else
if (SignalLevel_rel > -1)
s += "signal " + IntToStr(SignalLevel_rel) + "% | ";
/* w/o lock, demods may not report valid stats for
* quality, cnr, ber
*/
if (HasLock) {
if ((i = Device->SignalQuality()) > -1)
s += "quality " + IntToStr(i) + "% | ";
if (result & cnr_available)
s += "snr " + FloatToStr(CNR_dB, 4, 2, false) + "dB | ";
if (result & ber_available) {
s += "ber " + ExpToStr(BER);
if (BER > 1e-4)
s += " (too high)";
}
}
Message(s);
mSleep(1000);
}
delete data;
}
return 0;
}
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