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dvbsignalmonitor.cpp
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dvbsignalmonitor.cpp
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// -*- Mode: c++ -*-
#include <cerrno>
#include <cmath>
#include <cstring>
#include <unistd.h>
//Qt headers
#include <QCoreApplication>
// MythTV headers
#include "libmyth/mythcontext.h"
#include "libmythbase/mythdbcon.h"
#include "cardutil.h"
#include "dvbchannel.h"
#include "dvbrecorder.h"
#include "dvbsignalmonitor.h"
#include "dvbstreamhandler.h"
#include "dvbtypes.h"
#include "mpeg/atscstreamdata.h"
#include "mpeg/atsctables.h"
#include "mpeg/dvbstreamdata.h"
#include "mpeg/mpegtables.h"
#define LOC QString("DVBSigMon[%1](%2): ") \
.arg(m_inputid).arg(m_channel->GetDevice())
/**
* \brief Initializes signal lock and signal values.
*
* Start() must be called to actually begin continuous
* signal monitoring. The timeout value is retrieved from
* the database but is set to at least 3 seconds,
* and the signal threshold is initialized to 0%.
*
* \param db_cardnum Recorder number to monitor,
* if this is less than 0, SIGNAL events will not be
* sent to the frontend even if SetNotifyFrontend(true)
* is called.
* \param _channel DVBChannel for card
* \param _flags Flags to start with
*/
DVBSignalMonitor::DVBSignalMonitor(int db_cardnum, DVBChannel* _channel,
bool _release_stream,
uint64_t _flags)
: DTVSignalMonitor(db_cardnum, _channel, _release_stream, _flags),
// This snr setup is incorrect for API 3.x but works better
// than int16_t range in practice, however this is correct
// for the 4.0 DVB API which uses a uint16_t for the snr
m_signalToNoise (QCoreApplication::translate("(Common)",
"Signal To Noise"), "snr",
0, true, 0, 65535, 0ms),
m_bitErrorRate (tr("Bit Error Rate"), "ber",
65535, false, 0, 65535, 0ms),
m_uncorrectedBlocks(tr("Uncorrected Blocks"), "ucb",
65535, false, 0, 65535, 0ms),
m_rotorPosition (tr("Rotor Progress"), "pos",
100, true, 0, 100, 0ms),
m_streamHandlerStarted(false),
m_streamHandler(nullptr)
{
// This value should probably come from the database...
int threshold = 0; // signal strength threshold
// Tuning timeout time for channel lock from database, minimum is 3s
std::chrono::milliseconds wait = 3s; // Minimum timeout time
std::chrono::milliseconds signal_timeout = 0ms; // Not used
std::chrono::milliseconds tuning_timeout = 0ms; // Maximum time for channel lock from card
CardUtil::GetTimeouts(db_cardnum, signal_timeout, tuning_timeout);
if (tuning_timeout < wait)
{
LOG(VB_CHANNEL, LOG_DEBUG, LOC +
QString("Tuning timeout from database: %1 ms is too small, using %2 ms")
.arg(tuning_timeout.count()).arg(wait.count()));
}
else
{
wait = tuning_timeout; // Use value from database
LOG(VB_CHANNEL, LOG_DEBUG, LOC +
QString("Tuning timeout: %1 ms").arg(wait.count()));
}
m_signalLock.SetTimeout(wait);
m_signalStrength.SetTimeout(wait);
m_signalStrength.SetThreshold(threshold);
// This is incorrect for API 3.x but works better than int16_t range
// in practice, however this is correct for the 4.0 DVB API
m_signalStrength.SetRange(0, 65535);
// Determine the signal monitoring capabilities from the card and
// do not use the capabilities that are not present.
uint64_t rmflags = 0;
bool mok = false;
auto log_message = [&mok](const QString& loc, const QString& msg)
{
if (mok)
LOG(VB_CHANNEL, LOG_INFO, loc + "Can " + msg);
else
LOG(VB_GENERAL, LOG_WARNING, loc + "Cannot " + msg + ENO);
};
auto log_message_channel = [&mok](const QString& loc, const QString& msg)
{
if (mok)
LOG(VB_CHANNEL, LOG_INFO, loc + "Can " + msg);
else
LOG(VB_CHANNEL, LOG_WARNING, loc + "Cannot " + msg + ENO);
};
auto update_rmflags = [&mok, &rmflags](uint64_t flag)
{
if (!mok)
rmflags |= flag;
};
// Signal strength
auto flag = kSigMon_WaitForSig;
if (HasFlags(flag))
{
_channel->GetSignalStrength(&mok);
update_rmflags(flag);
log_message(LOC, "measure Signal Strength");
}
// Signal/Noise ratio
flag = kDVBSigMon_WaitForSNR;
if (HasFlags(flag))
{
_channel->GetSNR(&mok);
update_rmflags(flag);
log_message(LOC, "measure S/N");
}
// Bit error rate
flag = kDVBSigMon_WaitForBER;
if (HasFlags(flag))
{
_channel->GetBitErrorRate(&mok);
update_rmflags(flag);
log_message_channel(LOC, "measure Bit Error Rate");
}
// Uncorrected block count
flag = kDVBSigMon_WaitForUB;
if (HasFlags(flag))
{
_channel->GetUncorrectedBlockCount(&mok);
update_rmflags(flag);
log_message_channel(LOC, "count Uncorrected Blocks");
}
RemoveFlags(rmflags);
LOG(VB_CHANNEL, LOG_INFO, LOC + "DVBSignalMonitor::ctor " +
QString("initial flags %1").arg(sm_flags_to_string(m_flags)));
m_minimumUpdateRate = _channel->GetMinSignalMonitorDelay();
if (m_minimumUpdateRate > 30ms)
usleep(m_minimumUpdateRate);
m_streamHandler = DVBStreamHandler::Get(_channel->GetCardNum(), m_inputid);
}
/** \fn DVBSignalMonitor::~DVBSignalMonitor()
* \brief Stops signal monitoring and table monitoring threads.
*/
DVBSignalMonitor::~DVBSignalMonitor()
{
DVBSignalMonitor::Stop();
DVBStreamHandler::Return(m_streamHandler, m_inputid);
}
// documented in dtvsignalmonitor.h
void DVBSignalMonitor::SetRotorTarget(float target)
{
QMutexLocker locker(&m_statusLock);
m_rotorPosition.SetThreshold((int)roundf(100 * target));
}
void DVBSignalMonitor::GetRotorStatus(bool &was_moving, bool &is_moving)
{
DVBChannel *dvbchannel = GetDVBChannel();
if (!dvbchannel)
return;
const DiSEqCDevRotor *rotor = dvbchannel->GetRotor();
if (!rotor)
return;
QMutexLocker locker(&m_statusLock);
was_moving = m_rotorPosition.GetValue() < 100;
int pos = (int)truncf(rotor->GetProgress() * 100);
m_rotorPosition.SetValue(pos);
is_moving = m_rotorPosition.GetValue() < 100;
}
/** \fn DVBSignalMonitor::Stop(void)
* \brief Stop signal monitoring and table monitoring threads.
*/
void DVBSignalMonitor::Stop(void)
{
LOG(VB_CHANNEL, LOG_INFO, LOC + "Stop() -- begin");
SignalMonitor::Stop();
if (GetStreamData())
m_streamHandler->RemoveListener(GetStreamData());
m_streamHandlerStarted = false;
m_streamHandler->SetRetuneAllowed(false, nullptr, nullptr);
LOG(VB_CHANNEL, LOG_INFO, LOC + "Stop() -- end");
}
QStringList DVBSignalMonitor::GetStatusList(void) const
{
QStringList list = DTVSignalMonitor::GetStatusList();
m_statusLock.lock();
if (HasFlags(kDVBSigMon_WaitForSNR))
list<<m_signalToNoise.GetName()<<m_signalToNoise.GetStatus();
if (HasFlags(kDVBSigMon_WaitForBER))
list<<m_bitErrorRate.GetName()<<m_bitErrorRate.GetStatus();
if (HasFlags(kDVBSigMon_WaitForUB))
list<<m_uncorrectedBlocks.GetName()<<m_uncorrectedBlocks.GetStatus();
if (HasFlags(kDVBSigMon_WaitForPos))
list<<m_rotorPosition.GetName()<<m_rotorPosition.GetStatus();
m_statusLock.unlock();
return list;
}
void DVBSignalMonitor::HandlePMT(uint program_num, const ProgramMapTable *pmt)
{
DTVSignalMonitor::HandlePMT(program_num, pmt);
if (pmt->ProgramNumber() == (uint)m_programNumber)
{
DVBChannel *dvbchannel = GetDVBChannel();
if (dvbchannel)
dvbchannel->SetPMT(pmt);
}
}
void DVBSignalMonitor::HandleSTT(const SystemTimeTable *stt)
{
DTVSignalMonitor::HandleSTT(stt);
DVBChannel *dvbchannel = GetDVBChannel();
if (dvbchannel)
dvbchannel->SetTimeOffset(GetStreamData()->TimeOffset());
}
void DVBSignalMonitor::HandleTDT(const TimeDateTable *tdt)
{
DTVSignalMonitor::HandleTDT(tdt);
DVBChannel *dvbchannel = GetDVBChannel();
if (dvbchannel)
dvbchannel->SetTimeOffset(GetStreamData()->TimeOffset());
}
DVBChannel *DVBSignalMonitor::GetDVBChannel(void)
{
return dynamic_cast<DVBChannel*>(m_channel);
}
/** \fn DVBSignalMonitor::UpdateValues()
* \brief Fills in frontend stats and emits status Qt signals.
*
* This is automatically called by run(), after Start()
* has been used to start the signal monitoring thread.
*/
void DVBSignalMonitor::UpdateValues(void)
{
if (!m_running || m_exit)
return;
if (m_streamHandlerStarted)
{
if (!m_streamHandler->IsRunning())
{
m_error = tr("Error: stream handler died");
m_updateDone = true;
return;
}
// Update signal status for display
DVBChannel *dvbchannel = GetDVBChannel();
if (dvbchannel)
{
// Get info from card
uint sig = (uint) (dvbchannel->GetSignalStrength() * 65535);
uint snr = (uint) (dvbchannel->GetSNR() * 65535);
// Set SignalMonitorValues from info from card.
{
QMutexLocker locker(&m_statusLock);
if (HasFlags(kSigMon_WaitForSig))
m_signalStrength.SetValue(sig);
if (HasFlags(kDVBSigMon_WaitForSNR))
m_signalToNoise.SetValue(snr);
// LOG(VB_CHANSCAN, LOG_DEBUG, LOC +
// QString("Update sig:%1 snr:%2").arg(sig).arg(snr));
}
}
EmitStatus();
if (IsAllGood())
SendMessageAllGood();
m_updateDone = true;
return;
}
AddFlags(kSigMon_WaitForSig);
DVBChannel *dvbchannel = GetDVBChannel();
if (!dvbchannel)
return;
// Handle retuning after rotor has turned
if (HasFlags(SignalMonitor::kDVBSigMon_WaitForPos))
{
if (dvbchannel->GetRotor())
{
if (!m_streamHandler->IsRetuneAllowed())
m_streamHandler->SetRetuneAllowed(true, this, dvbchannel);
m_streamHandler->RetuneMonitor();
}
else
RemoveFlags(SignalMonitor::kDVBSigMon_WaitForPos);
}
bool wasLocked = false;
bool isLocked = false;
uint sig = 0;
uint snr = 0;
uint ber = 0;
uint ublocks = 0;
// Get info from card
bool has_lock = dvbchannel->HasLock();
if (HasFlags(kSigMon_WaitForSig))
sig = (uint) (dvbchannel->GetSignalStrength() * 65535);
if (HasFlags(kDVBSigMon_WaitForSNR))
snr = (uint) (dvbchannel->GetSNR() * 65535);
if (HasFlags(kDVBSigMon_WaitForBER))
ber = (uint) dvbchannel->GetBitErrorRate();
if (HasFlags(kDVBSigMon_WaitForUB))
ublocks = (uint) dvbchannel->GetUncorrectedBlockCount();
has_lock |= m_streamHandler->IsRunning();
// Set SignalMonitorValues from info from card.
{
QMutexLocker locker(&m_statusLock);
// BER and UB are actually uint32 values, but we
// clamp them at 64K. This is because these values
// are actually cumulative, but we don't try to
// normalize these to a time period.
wasLocked = m_signalLock.IsGood();
m_signalLock.SetValue((has_lock) ? 1 : 0);
isLocked = m_signalLock.IsGood();
if (HasFlags(kSigMon_WaitForSig))
m_signalStrength.SetValue(sig);
if (HasFlags(kDVBSigMon_WaitForSNR))
m_signalToNoise.SetValue(snr);
if (HasFlags(kDVBSigMon_WaitForBER))
m_bitErrorRate.SetValue(ber);
if (HasFlags(kDVBSigMon_WaitForUB))
m_uncorrectedBlocks.SetValue(ublocks);
}
// Signal lock change
if (wasLocked != isLocked)
{
LOG(VB_CHANNEL, LOG_INFO, LOC + "UpdateValues -- Signal " +
(isLocked ? "Locked" : "Lost"));
}
EmitStatus();
if (IsAllGood())
SendMessageAllGood();
// Start table monitoring if we are waiting on any table
// and we have a lock.
if (isLocked && GetStreamData() &&
(!HasFlags(kDVBSigMon_WaitForPos) || m_rotorPosition.IsGood()) &&
HasAnyFlag(kDTVSigMon_WaitForPAT | kDTVSigMon_WaitForPMT |
kDTVSigMon_WaitForMGT | kDTVSigMon_WaitForVCT |
kDTVSigMon_WaitForNIT | kDTVSigMon_WaitForSDT))
{
GetStreamData()->AddListeningPID(PID::MPEG_PAT_PID);
m_streamHandler->AddListener(GetStreamData(), true, false);
m_streamHandlerStarted = true;
}
m_updateDone = true;
}
/** \fn DVBSignalMonitor::EmitStatus(void)
* \brief Emits signals for lock, signal strength, etc.
*/
void DVBSignalMonitor::EmitStatus(void)
{
// Emit signals..
DTVSignalMonitor::EmitStatus();
if (HasFlags(kDVBSigMon_WaitForSNR))
SendMessage(kStatusSignalToNoise, m_signalToNoise);
if (HasFlags(kDVBSigMon_WaitForBER))
SendMessage(kStatusBitErrorRate, m_bitErrorRate);
if (HasFlags(kDVBSigMon_WaitForUB))
SendMessage(kStatusUncorrectedBlocks, m_uncorrectedBlocks);
if (HasFlags(kDVBSigMon_WaitForPos))
SendMessage(kStatusRotorPosition, m_rotorPosition);
}