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dvbdevice.c
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/*
* dvbdevice.c: The DVB device tuner interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbdevice.c 3.14 2015/01/14 12:09:19 kls Exp $
*/
#include "dvbdevice.h"
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "channels.h"
#include "diseqc.h"
#include "dvbci.h"
#include "menuitems.h"
#include "sourceparams.h"
static int DvbApiVersion = 0x0000; // the version of the DVB driver actually in use (will be determined by the first device created)
#define DVBS_TUNE_TIMEOUT 9000 //ms
#define DVBS_LOCK_TIMEOUT 2000 //ms
#define DVBC_TUNE_TIMEOUT 9000 //ms
#define DVBC_LOCK_TIMEOUT 2000 //ms
#define DVBT_TUNE_TIMEOUT 9000 //ms
#define DVBT_LOCK_TIMEOUT 2000 //ms
#define ATSC_TUNE_TIMEOUT 9000 //ms
#define ATSC_LOCK_TIMEOUT 2000 //ms
#define SCR_RANDOM_TIMEOUT 500 // ms (add random value up to this when tuning SCR device to avoid lockups)
// --- DVB Parameter Maps ----------------------------------------------------
const tDvbParameterMap PilotValues[] = {
{ 0, PILOT_OFF, trNOOP("off") },
{ 1, PILOT_ON, trNOOP("on") },
{ 999, PILOT_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap InversionValues[] = {
{ 0, INVERSION_OFF, trNOOP("off") },
{ 1, INVERSION_ON, trNOOP("on") },
{ 999, INVERSION_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap BandwidthValues[] = {
{ 5, 5000000, "5 MHz" },
{ 6, 6000000, "6 MHz" },
{ 7, 7000000, "7 MHz" },
{ 8, 8000000, "8 MHz" },
{ 10, 10000000, "10 MHz" },
{ 1712, 1712000, "1.712 MHz" },
{ -1, 0, NULL }
};
const tDvbParameterMap CoderateValues[] = {
{ 0, FEC_NONE, trNOOP("none") },
{ 12, FEC_1_2, "1/2" },
{ 23, FEC_2_3, "2/3" },
{ 34, FEC_3_4, "3/4" },
{ 35, FEC_3_5, "3/5" },
{ 45, FEC_4_5, "4/5" },
{ 56, FEC_5_6, "5/6" },
{ 67, FEC_6_7, "6/7" },
{ 78, FEC_7_8, "7/8" },
{ 89, FEC_8_9, "8/9" },
{ 910, FEC_9_10, "9/10" },
{ 999, FEC_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap ModulationValues[] = {
{ 16, QAM_16, "QAM16" },
{ 32, QAM_32, "QAM32" },
{ 64, QAM_64, "QAM64" },
{ 128, QAM_128, "QAM128" },
{ 256, QAM_256, "QAM256" },
{ 2, QPSK, "QPSK" },
{ 5, PSK_8, "8PSK" },
{ 6, APSK_16, "16APSK" },
{ 7, APSK_32, "32APSK" },
{ 10, VSB_8, "VSB8" },
{ 11, VSB_16, "VSB16" },
{ 12, DQPSK, "DQPSK" },
{ 999, QAM_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
#define DVB_SYSTEM_1 0 // see also nit.c
#define DVB_SYSTEM_2 1
const tDvbParameterMap SystemValuesSat[] = {
{ 0, DVB_SYSTEM_1, "DVB-S" },
{ 1, DVB_SYSTEM_2, "DVB-S2" },
{ -1, 0, NULL }
};
const tDvbParameterMap SystemValuesTerr[] = {
{ 0, DVB_SYSTEM_1, "DVB-T" },
{ 1, DVB_SYSTEM_2, "DVB-T2" },
{ -1, 0, NULL }
};
const tDvbParameterMap TransmissionValues[] = {
{ 1, TRANSMISSION_MODE_1K, "1K" },
{ 2, TRANSMISSION_MODE_2K, "2K" },
{ 4, TRANSMISSION_MODE_4K, "4K" },
{ 8, TRANSMISSION_MODE_8K, "8K" },
{ 16, TRANSMISSION_MODE_16K, "16K" },
{ 32, TRANSMISSION_MODE_32K, "32K" },
{ 999, TRANSMISSION_MODE_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap GuardValues[] = {
{ 4, GUARD_INTERVAL_1_4, "1/4" },
{ 8, GUARD_INTERVAL_1_8, "1/8" },
{ 16, GUARD_INTERVAL_1_16, "1/16" },
{ 32, GUARD_INTERVAL_1_32, "1/32" },
{ 128, GUARD_INTERVAL_1_128, "1/128" },
{ 19128, GUARD_INTERVAL_19_128, "19/128" },
{ 19256, GUARD_INTERVAL_19_256, "19/256" },
{ 999, GUARD_INTERVAL_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap HierarchyValues[] = {
{ 0, HIERARCHY_NONE, trNOOP("none") },
{ 1, HIERARCHY_1, "1" },
{ 2, HIERARCHY_2, "2" },
{ 4, HIERARCHY_4, "4" },
{ 999, HIERARCHY_AUTO, trNOOP("auto") },
{ -1, 0, NULL }
};
const tDvbParameterMap RollOffValues[] = {
{ 0, ROLLOFF_AUTO, trNOOP("auto") },
{ 20, ROLLOFF_20, "0.20" },
{ 25, ROLLOFF_25, "0.25" },
{ 35, ROLLOFF_35, "0.35" },
{ -1, 0, NULL }
};
int UserIndex(int Value, const tDvbParameterMap *Map)
{
const tDvbParameterMap *map = Map;
while (map && map->userValue != -1) {
if (map->userValue == Value)
return map - Map;
map++;
}
return -1;
}
int DriverIndex(int Value, const tDvbParameterMap *Map)
{
const tDvbParameterMap *map = Map;
while (map && map->userValue != -1) {
if (map->driverValue == Value)
return map - Map;
map++;
}
return -1;
}
int MapToUser(int Value, const tDvbParameterMap *Map, const char **String)
{
int n = DriverIndex(Value, Map);
if (n >= 0) {
if (String)
*String = tr(Map[n].userString);
return Map[n].userValue;
}
return -1;
}
const char *MapToUserString(int Value, const tDvbParameterMap *Map)
{
int n = DriverIndex(Value, Map);
if (n >= 0)
return Map[n].userString;
return "???";
}
int MapToDriver(int Value, const tDvbParameterMap *Map)
{
int n = UserIndex(Value, Map);
if (n >= 0)
return Map[n].driverValue;
return -1;
}
// --- cDvbTransponderParameters ---------------------------------------------
cDvbTransponderParameters::cDvbTransponderParameters(const char *Parameters)
{
polarization = 0;
inversion = INVERSION_AUTO;
bandwidth = 8000000;
coderateH = FEC_AUTO;
coderateL = FEC_AUTO;
modulation = QPSK;
system = DVB_SYSTEM_1;
transmission = TRANSMISSION_MODE_AUTO;
guard = GUARD_INTERVAL_AUTO;
hierarchy = HIERARCHY_AUTO;
rollOff = ROLLOFF_AUTO;
streamId = 0;
t2systemId = 0;
sisoMiso = 0;
pilot = PILOT_AUTO;
Parse(Parameters);
}
int cDvbTransponderParameters::PrintParameter(char *p, char Name, int Value) const
{
return Value >= 0 && Value != 999 ? sprintf(p, "%c%d", Name, Value) : 0;
}
cString cDvbTransponderParameters::ToString(char Type) const
{
#define ST(s) if (strchr(s, Type) && (strchr(s, '0' + system + 1) || strchr(s, '*')))
char buffer[64];
char *q = buffer;
*q = 0;
ST(" S *") q += sprintf(q, "%c", polarization);
ST(" T*") q += PrintParameter(q, 'B', MapToUser(bandwidth, BandwidthValues));
ST(" CST*") q += PrintParameter(q, 'C', MapToUser(coderateH, CoderateValues));
ST(" T*") q += PrintParameter(q, 'D', MapToUser(coderateL, CoderateValues));
ST(" T*") q += PrintParameter(q, 'G', MapToUser(guard, GuardValues));
ST("ACST*") q += PrintParameter(q, 'I', MapToUser(inversion, InversionValues));
ST("ACST*") q += PrintParameter(q, 'M', MapToUser(modulation, ModulationValues));
ST(" S 2") q += PrintParameter(q, 'N', MapToUser(pilot, PilotValues));
ST(" S 2") q += PrintParameter(q, 'O', MapToUser(rollOff, RollOffValues));
ST(" ST2") q += PrintParameter(q, 'P', streamId);
ST(" T2") q += PrintParameter(q, 'Q', t2systemId);
ST(" ST*") q += PrintParameter(q, 'S', MapToUser(system, SystemValuesSat)); // we only need the numerical value, so Sat or Terr doesn't matter
ST(" T*") q += PrintParameter(q, 'T', MapToUser(transmission, TransmissionValues));
ST(" T2") q += PrintParameter(q, 'X', sisoMiso);
ST(" T*") q += PrintParameter(q, 'Y', MapToUser(hierarchy, HierarchyValues));
return buffer;
}
const char *cDvbTransponderParameters::ParseParameter(const char *s, int &Value, const tDvbParameterMap *Map)
{
if (*++s) {
char *p = NULL;
errno = 0;
int n = strtol(s, &p, 10);
if (!errno && p != s) {
Value = Map ? MapToDriver(n, Map) : n;
if (Value >= 0)
return p;
}
}
esyslog("ERROR: invalid value for parameter '%c'", *(s - 1));
return NULL;
}
bool cDvbTransponderParameters::Parse(const char *s)
{
while (s && *s) {
switch (toupper(*s)) {
case 'B': s = ParseParameter(s, bandwidth, BandwidthValues); break;
case 'C': s = ParseParameter(s, coderateH, CoderateValues); break;
case 'D': s = ParseParameter(s, coderateL, CoderateValues); break;
case 'G': s = ParseParameter(s, guard, GuardValues); break;
case 'H': polarization = 'H'; s++; break;
case 'I': s = ParseParameter(s, inversion, InversionValues); break;
case 'L': polarization = 'L'; s++; break;
case 'M': s = ParseParameter(s, modulation, ModulationValues); break;
case 'N': s = ParseParameter(s, pilot, PilotValues); break;
case 'O': s = ParseParameter(s, rollOff, RollOffValues); break;
case 'P': s = ParseParameter(s, streamId); break;
case 'Q': s = ParseParameter(s, t2systemId); break;
case 'R': polarization = 'R'; s++; break;
case 'S': s = ParseParameter(s, system, SystemValuesSat); break; // we only need the numerical value, so Sat or Terr doesn't matter
case 'T': s = ParseParameter(s, transmission, TransmissionValues); break;
case 'V': polarization = 'V'; s++; break;
case 'X': s = ParseParameter(s, sisoMiso); break;
case 'Y': s = ParseParameter(s, hierarchy, HierarchyValues); break;
default: esyslog("ERROR: unknown parameter key '%c'", *s);
return false;
}
}
return true;
}
// --- cDvbTuner -------------------------------------------------------------
#define TUNER_POLL_TIMEOUT 10 // ms
class cDvbTuner : public cThread {
private:
static cMutex bondMutex;
enum eTunerStatus { tsIdle, tsSet, tsPositioning, tsTuned, tsLocked };
int frontendType;
const cDvbDevice *device;
int fd_frontend;
int adapter, frontend;
uint32_t subsystemId;
int tuneTimeout;
int lockTimeout;
time_t lastTimeoutReport;
cChannel channel;
const cDiseqc *lastDiseqc;
int diseqcOffset;
int lastSource;
cPositioner *positioner;
const cScr *scr;
bool lnbPowerTurnedOn;
eTunerStatus tunerStatus;
cMutex mutex;
cCondVar locked;
cCondVar newSet;
cDvbTuner *bondedTuner;
bool bondedMaster;
bool SetFrontendType(const cChannel *Channel);
cString GetBondingParams(const cChannel *Channel = NULL) const;
cDvbTuner *GetBondedMaster(void);
bool IsBondedMaster(void) const { return !bondedTuner || bondedMaster; }
void ClearEventQueue(void) const;
bool GetFrontendStatus(fe_status_t &Status) const;
cPositioner *GetPositioner(void);
void ExecuteDiseqc(const cDiseqc *Diseqc, unsigned int *Frequency);
void ResetToneAndVoltage(void);
bool SetFrontend(void);
virtual void Action(void);
public:
cDvbTuner(const cDvbDevice *Device, int Fd_Frontend, int Adapter, int Frontend);
virtual ~cDvbTuner();
int FrontendType(void) const { return frontendType; }
bool Bond(cDvbTuner *Tuner);
void UnBond(void);
bool BondingOk(const cChannel *Channel, bool ConsiderOccupied = false) const;
const cChannel *GetTransponder(void) const { return &channel; }
uint32_t SubsystemId(void) const { return subsystemId; }
bool IsTunedTo(const cChannel *Channel) const;
void SetChannel(const cChannel *Channel);
bool Locked(int TimeoutMs = 0);
const cPositioner *Positioner(void) const { return positioner; }
int GetSignalStrength(void) const;
int GetSignalQuality(void) const;
};
cMutex cDvbTuner::bondMutex;
cDvbTuner::cDvbTuner(const cDvbDevice *Device, int Fd_Frontend, int Adapter, int Frontend)
{
frontendType = SYS_UNDEFINED;
device = Device;
fd_frontend = Fd_Frontend;
adapter = Adapter;
frontend = Frontend;
subsystemId = cDvbDeviceProbe::GetSubsystemId(adapter, frontend);
tuneTimeout = 0;
lockTimeout = 0;
lastTimeoutReport = 0;
lastDiseqc = NULL;
diseqcOffset = 0;
lastSource = 0;
positioner = NULL;
scr = NULL;
lnbPowerTurnedOn = false;
tunerStatus = tsIdle;
bondedTuner = NULL;
bondedMaster = false;
SetDescription("frontend %d/%d tuner", adapter, frontend);
Start();
}
cDvbTuner::~cDvbTuner()
{
tunerStatus = tsIdle;
newSet.Broadcast();
locked.Broadcast();
Cancel(3);
UnBond();
/* looks like this irritates the SCR switch, so let's leave it out for now
if (lastDiseqc && lastDiseqc->IsScr()) {
unsigned int Frequency = 0;
ExecuteDiseqc(lastDiseqc, &Frequency);
}
*/
}
bool cDvbTuner::Bond(cDvbTuner *Tuner)
{
cMutexLock MutexLock(&bondMutex);
if (!bondedTuner) {
ResetToneAndVoltage();
bondedMaster = false; // makes sure we don't disturb an existing master
bondedTuner = Tuner->bondedTuner ? Tuner->bondedTuner : Tuner;
Tuner->bondedTuner = this;
dsyslog("tuner %d/%d bonded with tuner %d/%d", adapter, frontend, bondedTuner->adapter, bondedTuner->frontend);
return true;
}
else
esyslog("ERROR: tuner %d/%d already bonded with tuner %d/%d, can't bond with tuner %d/%d", adapter, frontend, bondedTuner->adapter, bondedTuner->frontend, Tuner->adapter, Tuner->frontend);
return false;
}
void cDvbTuner::UnBond(void)
{
cMutexLock MutexLock(&bondMutex);
if (cDvbTuner *t = bondedTuner) {
dsyslog("tuner %d/%d unbonded from tuner %d/%d", adapter, frontend, bondedTuner->adapter, bondedTuner->frontend);
while (t->bondedTuner != this)
t = t->bondedTuner;
if (t == bondedTuner)
t->bondedTuner = NULL;
else
t->bondedTuner = bondedTuner;
bondedMaster = false; // another one will automatically become master whenever necessary
bondedTuner = NULL;
}
}
cString cDvbTuner::GetBondingParams(const cChannel *Channel) const
{
if (!Channel)
Channel = &channel;
cDvbTransponderParameters dtp(Channel->Parameters());
if (Setup.DiSEqC) {
if (const cDiseqc *diseqc = Diseqcs.Get(device->CardIndex() + 1, Channel->Source(), Channel->Frequency(), dtp.Polarization(), NULL))
return diseqc->Commands();
}
else {
bool ToneOff = Channel->Frequency() < Setup.LnbSLOF;
bool VoltOff = dtp.Polarization() == 'V' || dtp.Polarization() == 'R';
return cString::sprintf("%c %c", ToneOff ? 't' : 'T', VoltOff ? 'v' : 'V');
}
return "";
}
bool cDvbTuner::BondingOk(const cChannel *Channel, bool ConsiderOccupied) const
{
cMutexLock MutexLock(&bondMutex);
if (cDvbTuner *t = bondedTuner) {
cString BondingParams = GetBondingParams(Channel);
do {
if (t->device->Priority() > IDLEPRIORITY || ConsiderOccupied && t->device->Occupied()) {
if (strcmp(BondingParams, t->GetBondedMaster()->GetBondingParams()) != 0)
return false;
}
t = t->bondedTuner;
} while (t != bondedTuner);
}
return true;
}
cDvbTuner *cDvbTuner::GetBondedMaster(void)
{
if (!bondedTuner)
return this; // an unbonded tuner is always "master"
cMutexLock MutexLock(&bondMutex);
if (bondedMaster)
return this;
// This tuner is bonded, but it's not the master, so let's see if there is a master at all:
if (cDvbTuner *t = bondedTuner) {
while (t != this) {
if (t->bondedMaster)
return t;
t = t->bondedTuner;
}
}
// None of the other bonded tuners is master, so make this one the master:
bondedMaster = true;
dsyslog("tuner %d/%d is now bonded master", adapter, frontend);
return this;
}
bool cDvbTuner::IsTunedTo(const cChannel *Channel) const
{
if (tunerStatus == tsIdle)
return false; // not tuned to
if (channel.Source() != Channel->Source() || channel.Transponder() != Channel->Transponder())
return false; // sufficient mismatch
// Polarization is already checked as part of the Transponder.
return strcmp(channel.Parameters(), Channel->Parameters()) == 0;
}
void cDvbTuner::SetChannel(const cChannel *Channel)
{
if (Channel) {
if (bondedTuner) {
cMutexLock MutexLock(&bondMutex);
cDvbTuner *BondedMaster = GetBondedMaster();
if (BondedMaster == this) {
if (strcmp(GetBondingParams(Channel), GetBondingParams()) != 0) {
// switching to a completely different band, so set all others to idle:
for (cDvbTuner *t = bondedTuner; t && t != this; t = t->bondedTuner)
t->SetChannel(NULL);
}
}
else if (strcmp(GetBondingParams(Channel), BondedMaster->GetBondingParams()) != 0)
BondedMaster->SetChannel(Channel);
}
cMutexLock MutexLock(&mutex);
if (!IsTunedTo(Channel))
tunerStatus = tsSet;
diseqcOffset = 0;
channel = *Channel;
lastTimeoutReport = 0;
newSet.Broadcast();
}
else {
cMutexLock MutexLock(&mutex);
tunerStatus = tsIdle;
ResetToneAndVoltage();
}
if (bondedTuner && device->IsPrimaryDevice())
cDevice::PrimaryDevice()->DelLivePids(); // 'device' is const, so we must do it this way
}
bool cDvbTuner::Locked(int TimeoutMs)
{
bool isLocked = (tunerStatus >= tsLocked);
if (isLocked || !TimeoutMs)
return isLocked;
cMutexLock MutexLock(&mutex);
if (TimeoutMs && tunerStatus < tsLocked)
locked.TimedWait(mutex, TimeoutMs);
return tunerStatus >= tsLocked;
}
void cDvbTuner::ClearEventQueue(void) const
{
cPoller Poller(fd_frontend);
if (Poller.Poll(TUNER_POLL_TIMEOUT)) {
dvb_frontend_event Event;
while (ioctl(fd_frontend, FE_GET_EVENT, &Event) == 0)
; // just to clear the event queue - we'll read the actual status below
}
}
bool cDvbTuner::GetFrontendStatus(fe_status_t &Status) const
{
ClearEventQueue();
while (1) {
if (ioctl(fd_frontend, FE_READ_STATUS, &Status) != -1)
return true;
if (errno != EINTR)
break;
}
return false;
}
//#define DEBUG_SIGNALSTRENGTH
//#define DEBUG_SIGNALQUALITY
int cDvbTuner::GetSignalStrength(void) const
{
ClearEventQueue();
uint16_t Signal;
while (1) {
if (ioctl(fd_frontend, FE_READ_SIGNAL_STRENGTH, &Signal) != -1)
break;
if (errno != EINTR)
return -1;
}
uint16_t MaxSignal = 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 Signal value into the range 0...0xFFFF.
switch (subsystemId) {
case 0x13C21019: // TT-budget S2-3200 (DVB-S/DVB-S2)
case 0x1AE40001: // TechniSat SkyStar HD2 (DVB-S/DVB-S2)
MaxSignal = 670; break;
}
int s = int(Signal) * 100 / MaxSignal;
if (s > 100)
s = 100;
#ifdef DEBUG_SIGNALSTRENGTH
fprintf(stderr, "FE %d/%d: %08X S = %04X %04X %3d%%\n", adapter, frontend, subsystemId, MaxSignal, Signal, s);
#endif
return s;
}
#define LOCK_THRESHOLD 5 // indicates that all 5 FE_HAS_* flags are set
int cDvbTuner::GetSignalQuality(void) const
{
fe_status_t Status;
if (GetFrontendStatus(Status)) {
// Actually one would expect these checks to be done from FE_HAS_SIGNAL to FE_HAS_LOCK, but some drivers (like the stb0899) are broken, so FE_HAS_LOCK is the only one that (hopefully) is generally reliable...
if ((Status & FE_HAS_LOCK) == 0) {
if ((Status & FE_HAS_SIGNAL) == 0)
return 0;
if ((Status & FE_HAS_CARRIER) == 0)
return 1;
if ((Status & FE_HAS_VITERBI) == 0)
return 2;
if ((Status & FE_HAS_SYNC) == 0)
return 3;
return 4;
}
#ifdef DEBUG_SIGNALQUALITY
bool HasSnr = true;
#endif
uint16_t Snr;
while (1) {
if (ioctl(fd_frontend, FE_READ_SNR, &Snr) != -1)
break;
if (errno != EINTR) {
Snr = 0xFFFF;
#ifdef DEBUG_SIGNALQUALITY
HasSnr = false;
#endif
break;
}
}
#ifdef DEBUG_SIGNALQUALITY
bool HasBer = true;
#endif
uint32_t Ber;
while (1) {
if (ioctl(fd_frontend, FE_READ_BER, &Ber) != -1)
break;
if (errno != EINTR) {
Ber = 0;
#ifdef DEBUG_SIGNALQUALITY
HasBer = false;
#endif
break;
}
}
#ifdef DEBUG_SIGNALQUALITY
bool HasUnc = true;
#endif
uint32_t Unc;
while (1) {
if (ioctl(fd_frontend, FE_READ_UNCORRECTED_BLOCKS, &Unc) != -1)
break;
if (errno != EINTR) {
Unc = 0;
#ifdef DEBUG_SIGNALQUALITY
HasUnc = false;
#endif
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: // TT-budget S2-3200 (DVB-S/DVB-S2)
case 0x1AE40001: // TechniSat SkyStar HD2 (DVB-S/DVB-S2)
if (frontendType == SYS_DVBS2) {
MinSnr = 10;
MaxSnr = 70;
}
else
MaxSnr = 200;
break;
case 0x20130245: // PCTV Systems PCTV 73ESE
case 0x2013024F: // PCTV Systems nanoStick T2 290e
MaxSnr = 255; break;
}
int a = int(constrain(Snr, MinSnr, MaxSnr)) * 100 / (MaxSnr - MinSnr);
int b = 100 - (Unc * 10 + (Ber / 256) * 5);
if (b < 0)
b = 0;
int q = LOCK_THRESHOLD + a * b * (100 - LOCK_THRESHOLD) / 100 / 100;
if (q > 100)
q = 100;
#ifdef DEBUG_SIGNALQUALITY
fprintf(stderr, "FE %d/%d: %08X Q = %04X %04X %d %5d %5d %3d%%\n", adapter, frontend, subsystemId, MaxSnr, Snr, HasSnr, HasBer ? int(Ber) : -1, HasUnc ? int(Unc) : -1, q);
#endif
return q;
}
return -1;
}
static unsigned int FrequencyToHz(unsigned int f)
{
while (f && f < 1000000)
f *= 1000;
return f;
}
cPositioner *cDvbTuner::GetPositioner(void)
{
if (!positioner) {
positioner = cPositioner::GetPositioner();
positioner->SetFrontend(fd_frontend);
}
return positioner;
}
void cDvbTuner::ExecuteDiseqc(const cDiseqc *Diseqc, unsigned int *Frequency)
{
if (!lnbPowerTurnedOn) {
CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13)); // must explicitly turn on LNB power
lnbPowerTurnedOn = true;
}
static cMutex Mutex;
if (Diseqc->IsScr())
Mutex.Lock();
struct dvb_diseqc_master_cmd cmd;
const char *CurrentAction = NULL;
cPositioner *Positioner = NULL;
bool Break = false;
for (int i = 0; !Break; i++) {
cmd.msg_len = sizeof(cmd.msg);
cDiseqc::eDiseqcActions da = Diseqc->Execute(&CurrentAction, cmd.msg, &cmd.msg_len, scr, Frequency);
if (da == cDiseqc::daNone) {
diseqcOffset = 0;
break;
}
bool d = i >= diseqcOffset;
switch (da) {
case cDiseqc::daToneOff: if (d) CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_OFF)); break;
case cDiseqc::daToneOn: if (d) CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_ON)); break;
case cDiseqc::daVoltage13: if (d) CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13)); break;
case cDiseqc::daVoltage18: if (d) CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_18)); break;
case cDiseqc::daMiniA: if (d) CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_A)); break;
case cDiseqc::daMiniB: if (d) CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_B)); break;
case cDiseqc::daCodes: if (d) CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_MASTER_CMD, &cmd)); break;
case cDiseqc::daPositionN: if ((Positioner = GetPositioner()) != NULL) {
if (d) {
Positioner->GotoPosition(Diseqc->Position(), cSource::Position(channel.Source()));
Break = Positioner->IsMoving();
}
}
break;
case cDiseqc::daPositionA: if ((Positioner = GetPositioner()) != NULL) {
if (d) {
Positioner->GotoAngle(cSource::Position(channel.Source()));
Break = Positioner->IsMoving();
}
}
break;
case cDiseqc::daScr:
case cDiseqc::daWait: break;
default: esyslog("ERROR: unknown diseqc command %d", da);
}
if (Break)
diseqcOffset = i + 1;
}
positioner = Positioner;
if (scr && !Break)
ResetToneAndVoltage(); // makes sure we don't block the bus!
if (Diseqc->IsScr())
Mutex.Unlock();
}
void cDvbTuner::ResetToneAndVoltage(void)
{
CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, bondedTuner ? SEC_VOLTAGE_OFF : SEC_VOLTAGE_13));
CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_OFF));
}
static int GetRequiredDeliverySystem(const cChannel *Channel, const cDvbTransponderParameters *Dtp)
{
int ds = SYS_UNDEFINED;
if (Channel->IsAtsc())
ds = SYS_ATSC;
else if (Channel->IsCable())
ds = SYS_DVBC_ANNEX_AC;
else if (Channel->IsSat())
ds = Dtp->System() == DVB_SYSTEM_1 ? SYS_DVBS : SYS_DVBS2;
else if (Channel->IsTerr())
ds = Dtp->System() == DVB_SYSTEM_1 ? SYS_DVBT : SYS_DVBT2;
else
esyslog("ERROR: can't determine frontend type for channel %d (%s)", Channel->Number(), Channel->Name());
return ds;
}
bool cDvbTuner::SetFrontend(void)
{
#define MAXFRONTENDCMDS 16
#define SETCMD(c, d) { Frontend[CmdSeq.num].cmd = (c);\
Frontend[CmdSeq.num].u.data = (d);\
if (CmdSeq.num++ > MAXFRONTENDCMDS) {\
esyslog("ERROR: too many tuning commands on frontend %d/%d", adapter, frontend);\
return false;\
}\
}
dtv_property Frontend[MAXFRONTENDCMDS];
memset(&Frontend, 0, sizeof(Frontend));
dtv_properties CmdSeq;
memset(&CmdSeq, 0, sizeof(CmdSeq));
CmdSeq.props = Frontend;
SETCMD(DTV_CLEAR, 0);
if (ioctl(fd_frontend, FE_SET_PROPERTY, &CmdSeq) < 0) {
esyslog("ERROR: frontend %d/%d: %m", adapter, frontend);
return false;
}
CmdSeq.num = 0;
cDvbTransponderParameters dtp(channel.Parameters());
// Determine the required frontend type:
frontendType = GetRequiredDeliverySystem(&channel, &dtp);
if (frontendType == SYS_UNDEFINED)
return false;
SETCMD(DTV_DELIVERY_SYSTEM, frontendType);
if (frontendType == SYS_DVBS || frontendType == SYS_DVBS2) {
unsigned int frequency = channel.Frequency();
if (Setup.DiSEqC) {
if (const cDiseqc *diseqc = Diseqcs.Get(device->CardIndex() + 1, channel.Source(), frequency, dtp.Polarization(), &scr)) {
frequency -= diseqc->Lof();
if (diseqc != lastDiseqc || diseqc->IsScr() || diseqc->Position() >= 0 && channel.Source() != lastSource) {
if (IsBondedMaster()) {
ExecuteDiseqc(diseqc, &frequency);
if (frequency == 0)
return false;
}
else
ResetToneAndVoltage();
lastDiseqc = diseqc;
lastSource = channel.Source();
}
}
else {
esyslog("ERROR: no DiSEqC parameters found for channel %d (%s)", channel.Number(), channel.Name());
return false;
}
}
else {
int tone = SEC_TONE_OFF;
if (frequency < (unsigned int)Setup.LnbSLOF) {
frequency -= Setup.LnbFrequLo;
tone = SEC_TONE_OFF;
}
else {
frequency -= Setup.LnbFrequHi;
tone = SEC_TONE_ON;
}
int volt = (dtp.Polarization() == 'V' || dtp.Polarization() == 'R') ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18;
if (!IsBondedMaster()) {
tone = SEC_TONE_OFF;
volt = SEC_VOLTAGE_13;
}
CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, volt));
CHECK(ioctl(fd_frontend, FE_SET_TONE, tone));
}
frequency = abs(frequency); // Allow for C-band, where the frequency is less than the LOF
// DVB-S/DVB-S2 (common parts)
SETCMD(DTV_FREQUENCY, frequency * 1000UL);
SETCMD(DTV_MODULATION, dtp.Modulation());
SETCMD(DTV_SYMBOL_RATE, channel.Srate() * 1000UL);
SETCMD(DTV_INNER_FEC, dtp.CoderateH());
SETCMD(DTV_INVERSION, dtp.Inversion());
if (frontendType == SYS_DVBS2) {
// DVB-S2
SETCMD(DTV_PILOT, dtp.Pilot());
SETCMD(DTV_ROLLOFF, dtp.RollOff());
if (DvbApiVersion >= 0x0508)
SETCMD(DTV_STREAM_ID, dtp.StreamId());
}
else {
// DVB-S
SETCMD(DTV_ROLLOFF, ROLLOFF_35); // DVB-S always has a ROLLOFF of 0.35
}
tuneTimeout = DVBS_TUNE_TIMEOUT;
lockTimeout = DVBS_LOCK_TIMEOUT;
}
else if (frontendType == SYS_DVBC_ANNEX_AC || frontendType == SYS_DVBC_ANNEX_B) {
// DVB-C
SETCMD(DTV_FREQUENCY, FrequencyToHz(channel.Frequency()));
SETCMD(DTV_INVERSION, dtp.Inversion());
SETCMD(DTV_SYMBOL_RATE, channel.Srate() * 1000UL);
SETCMD(DTV_INNER_FEC, dtp.CoderateH());
SETCMD(DTV_MODULATION, dtp.Modulation());
tuneTimeout = DVBC_TUNE_TIMEOUT;
lockTimeout = DVBC_LOCK_TIMEOUT;
}
else if (frontendType == SYS_DVBT || frontendType == SYS_DVBT2) {
// DVB-T/DVB-T2 (common parts)
SETCMD(DTV_FREQUENCY, FrequencyToHz(channel.Frequency()));
SETCMD(DTV_INVERSION, dtp.Inversion());
SETCMD(DTV_BANDWIDTH_HZ, dtp.Bandwidth());
SETCMD(DTV_CODE_RATE_HP, dtp.CoderateH());
SETCMD(DTV_CODE_RATE_LP, dtp.CoderateL());
SETCMD(DTV_MODULATION, dtp.Modulation());
SETCMD(DTV_TRANSMISSION_MODE, dtp.Transmission());
SETCMD(DTV_GUARD_INTERVAL, dtp.Guard());
SETCMD(DTV_HIERARCHY, dtp.Hierarchy());
if (frontendType == SYS_DVBT2) {
// DVB-T2
if (DvbApiVersion >= 0x0508) {
SETCMD(DTV_STREAM_ID, dtp.StreamId());
}
else if (DvbApiVersion >= 0x0503)
SETCMD(DTV_DVBT2_PLP_ID_LEGACY, dtp.StreamId());
}
tuneTimeout = DVBT_TUNE_TIMEOUT;
lockTimeout = DVBT_LOCK_TIMEOUT;
}
else if (frontendType == SYS_ATSC) {
// ATSC
SETCMD(DTV_FREQUENCY, FrequencyToHz(channel.Frequency()));
SETCMD(DTV_INVERSION, dtp.Inversion());
SETCMD(DTV_MODULATION, dtp.Modulation());
tuneTimeout = ATSC_TUNE_TIMEOUT;
lockTimeout = ATSC_LOCK_TIMEOUT;
}
else {
esyslog("ERROR: attempt to set channel with unknown DVB frontend type");
return false;
}
SETCMD(DTV_TUNE, 0);
if (ioctl(fd_frontend, FE_SET_PROPERTY, &CmdSeq) < 0) {
esyslog("ERROR: frontend %d/%d: %m", adapter, frontend);
return false;
}
return true;
}
void cDvbTuner::Action(void)
{
cTimeMs Timer;
bool LostLock = false;
fe_status_t Status = (fe_status_t)0;
while (Running()) {
fe_status_t NewStatus;
if (GetFrontendStatus(NewStatus))
Status = NewStatus;
cMutexLock MutexLock(&mutex);
int WaitTime = 1000;
switch (tunerStatus) {
case tsIdle:
break; // we want the TimedWait() below!
case tsSet:
tunerStatus = SetFrontend() ? tsPositioning : tsIdle;
continue;
case tsPositioning:
if (positioner) {
if (positioner->IsMoving())
break; // we want the TimedWait() below!
else if (diseqcOffset) {
lastDiseqc = NULL;
tunerStatus = tsSet; // have it process the rest of the DiSEqC sequence
continue;
}
}
tunerStatus = tsTuned;
Timer.Set(tuneTimeout + (scr ? rand() % SCR_RANDOM_TIMEOUT : 0));
if (positioner)
continue;
// otherwise run directly into tsTuned...
case tsTuned:
if (Timer.TimedOut()) {
tunerStatus = tsSet;
lastDiseqc = NULL;
lastSource = 0;
if (time(NULL) - lastTimeoutReport > 60) { // let's not get too many of these
isyslog("frontend %d/%d timed out while tuning to channel %d (%s), tp %d", adapter, frontend, channel.Number(), channel.Name(), channel.Transponder());
lastTimeoutReport = time(NULL);
}
continue;
}
WaitTime = 100; // allows for a quick change from tsTuned to tsLocked
// run into tsLocked...
case tsLocked:
if (Status & FE_REINIT) {
tunerStatus = tsSet;
lastDiseqc = NULL;
lastSource = 0;
isyslog("frontend %d/%d was reinitialized", adapter, frontend);
lastTimeoutReport = 0;
continue;
}
else if (Status & FE_HAS_LOCK) {
if (LostLock) {
isyslog("frontend %d/%d regained lock on channel %d (%s), tp %d", adapter, frontend, channel.Number(), channel.Name(), channel.Transponder());
LostLock = false;
}
tunerStatus = tsLocked;
locked.Broadcast();
lastTimeoutReport = 0;
}
else if (tunerStatus == tsLocked) {
LostLock = true;
isyslog("frontend %d/%d lost lock on channel %d (%s), tp %d", adapter, frontend, channel.Number(), channel.Name(), channel.Transponder());
tunerStatus = tsTuned;
Timer.Set(lockTimeout);
lastTimeoutReport = 0;
continue;
}
break;
default: esyslog("ERROR: unknown tuner status %d", tunerStatus);
}
newSet.TimedWait(mutex, WaitTime);