Provides interface to the tuning hardware when using DVB drivers. More...

#include <dvbchannel.h>

Inheritance diagram for DVBChannel:

Collaboration diagram for DVBChannel:

[legend]

Public Member Functions
	DVBChannel (QString device, TVRec *parent=nullptr)

	~DVBChannel () override

bool	Open (void) override
	Opens the channel changing hardware for use. More...

void	Close (void) override
	Closes the channel changing hardware to use. More...

bool	Init (QString &startchannel, bool setchan) override

void	SetPMT (const ProgramMapTable *pmt)
	Tells the Conditional Access Module which streams we wish to decode. More...

void	SetTimeOffset (double offset)
	Tells the Conditional Access Module the offset from the computers utc time to dvb time. More...

void	SetSlowTuning (std::chrono::milliseconds how_slow)

bool	IsOpen (void) const override
	Reports whether channel is already open. More...

int	GetFd (void) const override
	Returns file descriptor, -1 if it does not exist. More...

bool	IsTuningParamsProbeSupported (void) const
	Returns true iff tuning info probing is working. More...

QString	GetDevice (void) const override
	Returns String representing device, useful for debugging. More...

QString	GetCardNum (void) const
	Returns DVB device number, used to construct filenames for DVB devices. More...

QString	GetFrontendName (void) const
	Returns frontend name as reported by driver. More...

bool	IsMaster (void) const override
	Returns true if this is the first of a number of multi-rec devs. More...

bool	HasCRCBug (void) const
	Returns true iff we have a faulty DVB driver that munges PMT. More...

std::chrono::milliseconds	GetMinSignalMonitorDelay (void) const

const DiSEqCDevRotor *	GetRotor (void) const
	Returns rotor object if it exists, nullptr otherwise. More...

bool	HasLock (bool *ok=nullptr) const
	Returns true iff we have a signal carrier lock. More...

double	GetSignalStrength (bool *ok=nullptr) const
	Returns signal strength in the range [0.0..1.0] (non-calibrated). More...

double	GetSNR (bool *ok=nullptr) const
	Returns signal/noise in the range [0..1.0]. More...

double	GetBitErrorRate (bool *ok=nullptr) const
	Returns # of corrected bits since last call. First call undefined. More...

double	GetUncorrectedBlockCount (bool *ok=nullptr) const
	Returns # of uncorrected blocks since last call. First call undefined. More...

uint64_t	GetCapabilities (void) const

bool	CanDo (uint64_t capability) const

bool	SwitchToInput (int newcapchannel, bool setstarting)

bool	Tune (const DTVMultiplex &tuning) override
	This performs the actual frequency tuning and in some cases input switching. More...

bool	Tune (const DTVMultiplex &tuning, bool force_reset=false, bool same_input=false)
	Tunes the card to a frequency but does not deal with PIDs. More...

bool	Retune (void) override

bool	ProbeTuningParams (DTVMultiplex &tuning) const
	Fetches DTVMultiplex params from driver. More...

virtual bool	Tune (const DTVMultiplex &tuning)=0
	This performs the actual frequency tuning and in some cases input switching. More...

virtual bool	Tune (const IPTVTuningData &, bool)
	Performs IPTV Tuning. Only implemented by IPTVChannel. More...

virtual bool	Tune (const QString &)
	Leave it up to the implementation to map the channnum appropriately. More...

bool	Tune ([[maybe_unused]] const QString &freqid,[[maybe_unused]] int finetune) override
	This tunes on the frequency Identification parameter for hardware that supports it. More...

virtual bool	Tune ([[maybe_unused]] uint64_t frequency)

Public Member Functions inherited from DTVChannel
	DTVChannel (TVRec *parent)

	~DTVChannel () override

bool	SetChannelByString (const QString &chan) override

void	SetFormat (const QString &format) override

QString	GetFormat (void)

virtual bool	TuneMultiplex (uint mplexid, const QString &inputname)
	To be used by the channel scanner and possibly the EIT scanner. More...

virtual bool	Tune (const IPTVTuningData &, bool)
	Performs IPTV Tuning. Only implemented by IPTVChannel. More...

virtual bool	Tune (const QString &)
	Leave it up to the implementation to map the channnum appropriately. More...

virtual bool	EnterPowerSavingMode (void)
	Enters power saving mode if the card supports it. More...

bool	Tune ([[maybe_unused]] const QString &freqid, [[maybe_unused]] int finetune) override
	This tunes on the frequency Identification parameter for hardware that supports it. More...

virtual bool	Tune ([[maybe_unused]] uint64_t frequency)

int	GetProgramNumber (void) const
	Returns program number in PAT, -1 if unknown. More...

uint	GetMajorChannel (void) const
	Returns major channel, 0 if unknown. More...

uint	GetMinorChannel (void) const
	Returns minor channel, 0 if unknown. More...

uint	GetOriginalNetworkID (void) const
	Returns DVB original_network_id, 0 if unknown. More...

uint	GetTransportID (void) const
	Returns DVB transport_stream_id, 0 if unknown. More...

QString	GetSIStandard (void) const
	Returns PSIP table standard: MPEG, DVB, ATSC, or OpenCable. More...

QString	GetSuggestedTuningMode (bool is_live_tv) const
	Returns suggested tuning mode: "mpeg", "dvb", or "atsc". More...

QString	GetTuningMode (void) const
	Returns tuning mode last set by SetTuningMode(). More...

virtual std::vector< DTVTunerType >	GetTunerTypes (void) const
	Returns a vector of supported tuning types. More...

void	GetCachedPids (pid_cache_t &pid_cache) const
	Returns cached MPEG PIDs for last tuned channel. More...

void	RegisterForMaster (const QString &key)

void	DeregisterForMaster (const QString &key)

virtual bool	IsPIDTuningSupported (void) const

virtual bool	IsIPTV (void) const

bool	HasGeneratedPAT (void) const

bool	HasGeneratedPMT (void) const

const ProgramAssociationTable *	GetGeneratedPAT (void) const

const ProgramMapTable *	GetGeneratedPMT (void) const

void	SetTuningMode (const QString &tuning_mode)
	Sets tuning mode: "mpeg", "dvb", "atsc", etc. More...

void	SaveCachedPids (const pid_cache_t &pid_cache) const
	Saves MPEG PIDs to cache to database. More...

Public Member Functions inherited from ChannelBase
	ChannelBase (TVRec *parent)

virtual	~ChannelBase (void)

virtual bool	IsTunable (const QString &channum) const

virtual int	SetFreqTable (const QString &)

virtual void	SetFd (int fd)
	Sets file descriptor. More...

virtual bool	Tune (const QString &, int)

virtual bool	IsExternalChannelChangeInUse (void)

virtual uint	GetNextChannel (uint chanid, ChannelChangeDirection direction) const

virtual uint	GetNextChannel (const QString &channum, ChannelChangeDirection direction) const

virtual QString	GetChannelName (void) const

virtual int	GetInputID (void) const

virtual QString	GetInputName (void) const

virtual uint	GetSourceID (void) const

bool	IsCommercialFree (void) const
	Returns true iff commercial detection is not required. More...

virtual void	Renumber (uint sourceid, const QString &oldChanNum, const QString &newChanNum)
	Changes a channum if we have it cached anywhere. More...

virtual bool	InitializeInput (void)
	Fills in input map from DB. More...

virtual void	StoreInputChannels (void)
	Saves current channel as the default channel for the current input. More...

virtual bool	InitPictureAttributes (void)

virtual int	GetPictureAttribute (PictureAttribute) const

virtual int	ChangePictureAttribute (PictureAdjustType, PictureAttribute, bool)

bool	CheckChannel (const QString &channum) const

void	SetInputID (uint _inputid)

int	GetMajorID (void)

Private Member Functions
bool	Open (DVBChannel *who)

void	Close (DVBChannel *who)

int	GetChanID (void) const override
	Returns Channel ID. More...

void	CheckOptions (DTVMultiplex &t) const override
	Checks tuning for problems, and tries to fix them. More...

void	CheckFrequency (uint64_t frequency) const
	Checks tuning frequency. More...

bool	CheckModulation (DTVModulation modulation) const
	Return true iff modulation is supported modulation on the frontend. More...

bool	CheckCodeRate (DTVCodeRate rate) const
	Return true iff rate is supported rate on the frontend. More...

DVBChannel *	GetMasterLock (void) const

double	GetSignalStrengthDVBv5 (bool *ok) const
	Get Signal strength from the DVBv5 interface [0-1.0] It is transformed to a linear relative scale if provided in dB. More...

double	GetSNRDVBv5 (bool *ok) const
	Get SNR from the DVBv5 interface [0-1.0] It is transformed to a linear relative scale if provided in dB. More...

double	GetBitErrorRateDVBv5 (bool *ok) const
	Get Bit Error Rate from the DVBv5 interface. More...

double	GetUncorrectedBlockCountDVBv5 (bool *ok) const
	Get Uncorrected Block Count from the DVBv5 interface. More...

void	DrainDVBEvents (void)

bool	WaitForBackend (std::chrono::milliseconds timeout_ms)
	Waits for backend to get tune message. More...

Static Private Member Functions
static void	ReturnMasterLock (DVBChannel *&dvbm)

Private Attributes
IsOpenMap	m_isOpen

DiSEqCDevSettings	m_diseqcSettings

DiSEqCDevTree *	m_diseqcTree {nullptr}

DVBCam *	m_dvbCam {nullptr}

QString	m_frontendName

uint64_t	m_capabilities {0}

uint64_t	m_extModulations {0}

uint64_t	m_frequencyMinimum {0}

uint64_t	m_frequencyMaximum {0}

uint	m_symbolRateMinimum {0}

uint	m_symbolRateMaximum {0}

uint	m_version {0}

bool	m_legacyFe {false}

bool	m_hasV5Stats {false}

DTVModulationSystem	m_currentSys

QList< DTVModulationSystem >	m_sysList

QMutex	m_tuneLock

QRecursiveMutex	m_hwLock

DTVMultiplex	m_desiredTuning

DTVMultiplex	m_prevTuning

uint	m_lastLnbDevId {(uint)~0x0}

std::chrono::milliseconds	m_tuningDelay { 0ms}

std::chrono::milliseconds	m_sigMonDelay {25ms}

bool	m_firstTune {true}

int	m_fdFrontend {-1}

QString	m_device

QString	m_key

bool	m_hasCrcBug {false}

QMutex	m_tuneDelayLock

Static Private Attributes
static std::chrono::milliseconds	s_lastTuning = MythDate::currentMSecsSinceEpochAsDuration()

Additional Inherited Members
Public Types inherited from DTVChannel
using	DTVChannelP = DTVChannel *

Static Public Member Functions inherited from DTVChannel
static DTVChannel *	GetMasterLock (const QString &key)

static void	ReturnMasterLock (DTVChannelP &chan)

Static Public Member Functions inherited from ChannelBase
static ChannelBase *	CreateChannel (TVRec *tvrec, const GeneralDBOptions &genOpt, const DVBDBOptions &dvbOpt, const FireWireDBOptions &fwOpt, const QString &startchannel, bool enter_power_save_mode, QString &rbFileExt, bool setchan)

Protected Types inherited from DTVChannel
using	MasterMap = QMap< QString, QList< DTVChannel * > >

Protected Member Functions inherited from DTVChannel
void	SetSIStandard (const QString &si_std)
	Sets PSIP table standard: MPEG, DVB, ATSC, or OpenCable. More...

void	SetDTVInfo (uint atsc_major, uint atsc_minor, uint dvb_orig_netid, uint mpeg_tsid, int mpeg_pnum)

void	ClearDTVInfo (void)

void	HandleScriptEnd (bool ok) override

Protected Member Functions inherited from ChannelBase
virtual bool	IsInputAvailable (uint &mplexid_restriction, uint &chanid_restriction) const
	Switches to another input on hardware, and sets the channel is setstarting is true. More...

virtual bool	IsExternalChannelChangeSupported (void)

bool	KillScript (void)

void	HandleScript (const QString &freqid)

uint	GetScriptStatus (bool holding_lock=false)

bool	ChangeExternalChannel (const QString &changer, const QString &freqid)

bool	ChangeInternalChannel (const QString &freqid, uint cardinputid) const

Protected Attributes inherited from DTVChannel
QMutex	m_dtvinfoLock

DTVTunerType	m_tunerType {DTVTunerType::kTunerTypeUnknown}

QString	m_sistandard {"mpeg"}
	PSIP table standard: MPEG, DVB, ATSC, OpenCable. More...

QString	m_tuningMode

QString	m_tvFormat

int	m_currentProgramNum {-1}

uint	m_currentATSCMajorChannel {0}

uint	m_currentATSCMinorChannel {0}

uint	m_currentTransportID {0}

uint	m_currentOriginalNetworkID {0}

ProgramAssociationTable *	m_genPAT {nullptr}
	This is a generated PAT for RAW pid tuning. More...

ProgramMapTable *	m_genPMT {nullptr}
	This is a generated PMT for RAW pid tuning. More...

Protected Attributes inherited from ChannelBase
TVRec *	m_pParent {nullptr}

QString	m_curChannelName

bool	m_commFree {false}

uint	m_inputId {0}

uint	m_sourceId {0}

QString	m_name

QString	m_startChanNum

QString	m_externalChanger

QString	m_tuneToChannel

ChannelInfoList	m_channels
	channels across all inputs More...

QMutex	m_systemLock

MythSystemLegacy *	m_system {nullptr}

uint	m_systemStatus {0}
	These get mapped from the GENERIC_EXIT_* to these values for use with the signalmonitor code. More...

Static Protected Attributes inherited from DTVChannel
static QReadWriteLock	s_master_map_lock

static MasterMap	s_master_map

Detailed Description

Provides interface to the tuning hardware when using DVB drivers.

Bug:: Only supports single input cards.

Definition at line 31 of file dvbchannel.h.

Constructor & Destructor Documentation

◆ DVBChannel()

DVBChannel::DVBChannel	(	QString	device,
		TVRec *	parent = `nullptr`
	)

explicit

Definition at line 80 of file dvbchannel.cpp.

◆ ~DVBChannel()

DVBChannel::~DVBChannel ( )

override

Definition at line 106 of file dvbchannel.cpp.

Member Function Documentation

◆ Open() [1/2]

bool DVBChannel::Open ( void )

inlineoverridevirtual

Opens the channel changing hardware for use.

Implements ChannelBase.

Definition at line 37 of file dvbchannel.h.

Referenced by Init(), and Open().

◆ Close() [1/2]

void DVBChannel::Close ( void )

inlineoverridevirtual

Closes the channel changing hardware to use.

Implements ChannelBase.

Definition at line 39 of file dvbchannel.h.

Referenced by Close(), Open(), and ~DVBChannel().

◆ Init()

bool DVBChannel::Init	(	QString &	startchannel,
		bool	setchan
	)

overridevirtual

Reimplemented from ChannelBase.

Definition at line 552 of file dvbchannel.cpp.

◆ SetPMT()

void DVBChannel::SetPMT ( const ProgramMapTable * pmt )

Tells the Conditional Access Module which streams we wish to decode.

Definition at line 726 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::HandlePMT(), DVBRecorder::SetCAMPMT(), and ChannelScanSM::TestNextProgramEncryption().

◆ SetTimeOffset()

void DVBChannel::SetTimeOffset ( double offset )

Tells the Conditional Access Module the offset from the computers utc time to dvb time.

Definition at line 738 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::HandleSTT(), DVBSignalMonitor::HandleTDT(), and DVBRecorder::UpdateCAMTimeOffset().

◆ SetSlowTuning()

void DVBChannel::SetSlowTuning ( std::chrono::milliseconds how_slow )

inline

Definition at line 47 of file dvbchannel.h.

Referenced by ChannelBase::CreateChannel().

◆ IsOpen()

bool DVBChannel::IsOpen ( void ) const

overridevirtual

Reports whether channel is already open.

Implements ChannelBase.

Definition at line 544 of file dvbchannel.cpp.

Referenced by Init().

◆ GetFd()

int DVBChannel::GetFd ( void ) const

inlineoverridevirtual

Returns file descriptor, -1 if it does not exist.

Reimplemented from ChannelBase.

Definition at line 52 of file dvbchannel.h.

◆ IsTuningParamsProbeSupported()

bool DVBChannel::IsTuningParamsProbeSupported ( void ) const

Returns true iff tuning info probing is working.

Definition at line 988 of file dvbchannel.cpp.

Referenced by IsTuningParamsProbeSupported().

◆ GetDevice()

QString DVBChannel::GetDevice ( void ) const

inlineoverridevirtual

Returns String representing device, useful for debugging.

Reimplemented from ChannelBase.

Definition at line 56 of file dvbchannel.h.

◆ GetCardNum()

QString DVBChannel::GetCardNum ( void ) const

inline

Returns DVB device number, used to construct filenames for DVB devices.

Definition at line 59 of file dvbchannel.h.

Referenced by DVBSignalMonitor::DVBSignalMonitor().

◆ GetFrontendName()

QString DVBChannel::GetFrontendName ( void ) const

inline

Returns frontend name as reported by driver.

Definition at line 61 of file dvbchannel.h.

◆ IsMaster()

bool DVBChannel::IsMaster ( void ) const

overridevirtual

Returns true if this is the first of a number of multi-rec devs.

Reimplemented from DTVChannel.

Definition at line 1540 of file dvbchannel.cpp.

◆ HasCRCBug()

bool DVBChannel::HasCRCBug ( void ) const

inline

Returns true iff we have a faulty DVB driver that munges PMT.

Definition at line 64 of file dvbchannel.h.

◆ GetMinSignalMonitorDelay()

std::chrono::milliseconds DVBChannel::GetMinSignalMonitorDelay ( void ) const

inline

Definition at line 65 of file dvbchannel.h.

Referenced by DVBSignalMonitor::DVBSignalMonitor().

◆ GetRotor()

const DiSEqCDevRotor * DVBChannel::GetRotor ( void ) const

Returns rotor object if it exists, nullptr otherwise.

Definition at line 1158 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::GetRotorStatus(), ChannelScanSM::HasTimedOut(), DVBStreamHandler::RetuneMonitor(), and DVBSignalMonitor::UpdateValues().

◆ HasLock()

bool DVBChannel::HasLock ( bool * ok = nullptr ) const

Returns true iff we have a signal carrier lock.

Definition at line 1166 of file dvbchannel.cpp.

Referenced by HasLock(), and DVBSignalMonitor::UpdateValues().

◆ GetSignalStrength()

double DVBChannel::GetSignalStrength ( bool * ok = nullptr ) const

Returns signal strength in the range [0.0..1.0] (non-calibrated).

Definition at line 1257 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::DVBSignalMonitor(), GetSignalStrength(), and DVBSignalMonitor::UpdateValues().

◆ GetSNR()

double DVBChannel::GetSNR ( bool * ok = nullptr ) const

Returns signal/noise in the range [0..1.0].

Some drivers report the actual ratio, while others report the dB, but in this case some weak signals may report a very high S/N since negative dB are not supported by MythTV or the 4.0 version of the DVB API due to the large number of drivers that ignored the fact that this was a signed number in the 3.0 API.

Definition at line 1342 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::DVBSignalMonitor(), GetSNR(), and DVBSignalMonitor::UpdateValues().

◆ GetBitErrorRate()

double DVBChannel::GetBitErrorRate ( bool * ok = nullptr ) const

Returns # of corrected bits since last call. First call undefined.

Definition at line 1425 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::DVBSignalMonitor(), GetBitErrorRate(), and DVBSignalMonitor::UpdateValues().

◆ GetUncorrectedBlockCount()

double DVBChannel::GetUncorrectedBlockCount ( bool * ok = nullptr ) const

Returns # of uncorrected blocks since last call. First call undefined.

Definition at line 1493 of file dvbchannel.cpp.

Referenced by DVBSignalMonitor::DVBSignalMonitor(), GetUncorrectedBlockCount(), and DVBSignalMonitor::UpdateValues().

◆ GetCapabilities()

uint64_t DVBChannel::GetCapabilities ( void ) const

inline

Definition at line 85 of file dvbchannel.h.

◆ CanDo()

bool DVBChannel::CanDo ( uint64_t capability ) const

inline

Definition at line 86 of file dvbchannel.h.

◆ SwitchToInput()

bool DVBChannel::SwitchToInput	(	int	newcapchannel,
		bool	setstarting
	)

◆ Tune() [1/7]

bool DVBChannel::Tune ( const DTVMultiplex & tuning )

overridevirtual

This performs the actual frequency tuning and in some cases input switching.

In rare cases such as ASI this does nothing since all the channels are in the same MPTS stream on the same input. But generally you will need to implement this when adding support for new hardware.

Implements DTVChannel.

Definition at line 744 of file dvbchannel.cpp.

Referenced by Retune(), and Tune().

◆ Tune() [2/7]

bool DVBChannel::Tune	(	const DTVMultiplex &	tuning,
		bool	force_reset = `false`,
		bool	same_input = `false`
	)

Tunes the card to a frequency but does not deal with PIDs.

This is used by DVB Channel Scanner, the EIT Parser, and by TVRec.

Parameters

tuning	Info on transport to tune to
force_reset	If true, frequency tuning is done even if it should not be needed.
same_input	Optional, doesn't change input (for retuning).

Returns: true on success, false on failure

Definition at line 770 of file dvbchannel.cpp.

◆ Retune()

bool DVBChannel::Retune ( void )

overridevirtual

Reimplemented from ChannelBase.

Definition at line 980 of file dvbchannel.cpp.

Referenced by DVBStreamHandler::RetuneMonitor().

◆ ProbeTuningParams()

bool DVBChannel::ProbeTuningParams ( DTVMultiplex & tuning ) const

Fetches DTVMultiplex params from driver.

Note: Only updates tuning on success.

Returns: true on success, false on failure

Definition at line 1034 of file dvbchannel.cpp.

Referenced by ProbeTuningParams().

◆ Open() [2/2]

bool DVBChannel::Open ( DVBChannel * who )

private

Definition at line 183 of file dvbchannel.cpp.

◆ Close() [2/2]

void DVBChannel::Close ( DVBChannel * who )

private

Definition at line 144 of file dvbchannel.cpp.

◆ GetChanID()

int DVBChannel::GetChanID ( void ) const

overrideprivatevirtual

Returns Channel ID.

Bug:: This only works if there is only one input on the card.

Reimplemented from ChannelBase.

Definition at line 1094 of file dvbchannel.cpp.

◆ CheckOptions()

void DVBChannel::CheckOptions ( DTVMultiplex & ) const

overrideprivatevirtual

Checks tuning for problems, and tries to fix them.

Reimplemented from DTVChannel.

Definition at line 575 of file dvbchannel.cpp.

◆ CheckFrequency()

void DVBChannel::CheckFrequency ( uint64_t frequency ) const

private

Checks tuning frequency.

Definition at line 563 of file dvbchannel.cpp.

Referenced by CheckOptions(), and Tune().

◆ CheckModulation()

bool DVBChannel::CheckModulation ( DTVModulation modulation ) const

private

Return true iff modulation is supported modulation on the frontend.

Definition at line 701 of file dvbchannel.cpp.

Referenced by CheckOptions().

◆ CheckCodeRate()

bool DVBChannel::CheckCodeRate ( DTVCodeRate rate ) const

private

Return true iff rate is supported rate on the frontend.

Definition at line 682 of file dvbchannel.cpp.

Referenced by CheckOptions().

◆ GetMasterLock()

DVBChannel * DVBChannel::GetMasterLock ( void ) const

private

Definition at line 1531 of file dvbchannel.cpp.

Referenced by CheckOptions(), Close(), GetBitErrorRate(), GetSignalStrength(), GetSNR(), GetUncorrectedBlockCount(), HasLock(), IsMaster(), IsTuningParamsProbeSupported(), Open(), ProbeTuningParams(), and Tune().

◆ ReturnMasterLock()

void DVBChannel::ReturnMasterLock ( DVBChannel *& dvbm )

staticprivate

Definition at line 1524 of file dvbchannel.cpp.

Referenced by CheckOptions(), Close(), GetBitErrorRate(), GetSignalStrength(), GetSNR(), GetUncorrectedBlockCount(), HasLock(), IsMaster(), IsTuningParamsProbeSupported(), Open(), ProbeTuningParams(), and Tune().

◆ GetSignalStrengthDVBv5()

double DVBChannel::GetSignalStrengthDVBv5 ( bool * ok ) const

private

Get Signal strength from the DVBv5 interface [0-1.0] It is transformed to a linear relative scale if provided in dB.

Parameters

ok	set to true if provided and value exists

Returns: linear signal strength in [0.0-1.0]

Definition at line 1200 of file dvbchannel.cpp.

Referenced by GetSignalStrength().

◆ GetSNRDVBv5()

double DVBChannel::GetSNRDVBv5 ( bool * ok ) const

private

Get SNR from the DVBv5 interface [0-1.0] It is transformed to a linear relative scale if provided in dB.

Parameters

ok	set to true if provided and value exists

Returns: linear SNR in [0.0-1.0]

Definition at line 1290 of file dvbchannel.cpp.

Referenced by GetSNR().

◆ GetBitErrorRateDVBv5()

double DVBChannel::GetBitErrorRateDVBv5 ( bool * ok ) const

private

Get Bit Error Rate from the DVBv5 interface.

Parameters

ok	set to true if provided and value exists

Returns: bit error rate

Definition at line 1375 of file dvbchannel.cpp.

Referenced by GetBitErrorRate().

◆ GetUncorrectedBlockCountDVBv5()

double DVBChannel::GetUncorrectedBlockCountDVBv5 ( bool * ok ) const

private

Get Uncorrected Block Count from the DVBv5 interface.

Parameters

ok	set to true if provided and value exists

Returns: block count

Definition at line 1456 of file dvbchannel.cpp.

Referenced by GetUncorrectedBlockCount().

◆ DrainDVBEvents()

void DVBChannel::DrainDVBEvents ( void )

private

Definition at line 1552 of file dvbchannel.cpp.

Referenced by Tune().

◆ WaitForBackend()

bool DVBChannel::WaitForBackend ( std::chrono::milliseconds timeout_ms )

private

Waits for backend to get tune message.

With linux 2.6.12 or later this should block until the backend is tuned to the proper frequency.

With earlier kernels sleeping for timeout_ms may save us.

Waiting for DVB events has been tried, but this fails with several DVB cards. They either don't send the required events or delete them from the event queue before we can read the event.

Using a FE_GET_FRONTEND has also been tried, but returns the old data until a 2 sec timeout elapses on at least one DVB card.

We do not block until we have a lock, the signal monitor does that.

Parameters

timeout_ms timeout before FE_READ_STATUS in milliseconds

Definition at line 1587 of file dvbchannel.cpp.

Referenced by Tune().

◆ Tune() [3/7]

virtual bool DTVChannel::Tune

This performs the actual frequency tuning and in some cases input switching.

In rare cases such as ASI this does nothing since all the channels are in the same MPTS stream on the same input. But generally you will need to implement this when adding support for new hardware.

◆ Tune() [4/7]

virtual bool DTVChannel::Tune

inline

Performs IPTV Tuning. Only implemented by IPTVChannel.

Definition at line 58 of file dtvchannel.h.

◆ Tune() [5/7]

virtual bool DTVChannel::Tune

inline

Leave it up to the implementation to map the channnum appropriately.

Used by the ExternalRecorder.

Definition at line 63 of file dtvchannel.h.

◆ Tune() [6/7]

bool DTVChannel::Tune

inlineoverride

This tunes on the frequency Identification parameter for hardware that supports it.

This is only called when there is no frequency set. This is used to implement "Channel Numbers" in analog tuning scenarios and to implement "Virtual Channels" in the OCUR and Firewire tuners.

Definition at line 75 of file dtvchannel.h.

◆ Tune() [7/7]

virtual bool DTVChannel::Tune

inline

Definition at line 81 of file dtvchannel.h.

Member Data Documentation

◆ m_isOpen

IsOpenMap DVBChannel::m_isOpen

private

Definition at line 135 of file dvbchannel.h.

Referenced by Close(), IsOpen(), Open(), and ~DVBChannel().

◆ m_diseqcSettings

DiSEqCDevSettings DVBChannel::m_diseqcSettings

private

Definition at line 138 of file dvbchannel.h.

Referenced by GetRotor(), Open(), and Tune().

◆ m_diseqcTree

DiSEqCDevTree* DVBChannel::m_diseqcTree {nullptr}

private

Definition at line 139 of file dvbchannel.h.

Referenced by CheckOptions(), Close(), GetRotor(), IsTuningParamsProbeSupported(), Open(), ProbeTuningParams(), and Tune().

◆ m_dvbCam

DVBCam* DVBChannel::m_dvbCam {nullptr}

private

Definition at line 140 of file dvbchannel.h.

Referenced by Close(), DVBChannel(), SetPMT(), SetTimeOffset(), and ~DVBChannel().

◆ m_frontendName

QString DVBChannel::m_frontendName

private

Definition at line 143 of file dvbchannel.h.

Referenced by GetFrontendName(), and Open().

◆ m_capabilities

uint64_t DVBChannel::m_capabilities {0}

private

Definition at line 144 of file dvbchannel.h.

Referenced by CanDo(), CheckCodeRate(), CheckModulation(), CheckOptions(), GetCapabilities(), Open(), and Tune().

◆ m_extModulations

uint64_t DVBChannel::m_extModulations {0}

private

Definition at line 145 of file dvbchannel.h.

Referenced by Open().

◆ m_frequencyMinimum

uint64_t DVBChannel::m_frequencyMinimum {0}

private

Definition at line 146 of file dvbchannel.h.

Referenced by CheckFrequency(), and Open().

◆ m_frequencyMaximum

uint64_t DVBChannel::m_frequencyMaximum {0}

private

Definition at line 147 of file dvbchannel.h.

Referenced by CheckFrequency(), and Open().

◆ m_symbolRateMinimum

uint DVBChannel::m_symbolRateMinimum {0}

private

Definition at line 148 of file dvbchannel.h.

Referenced by CheckOptions(), and Open().

◆ m_symbolRateMaximum

uint DVBChannel::m_symbolRateMaximum {0}

private

Definition at line 149 of file dvbchannel.h.

Referenced by CheckOptions(), and Open().

◆ m_version

uint DVBChannel::m_version {0}

private

Definition at line 151 of file dvbchannel.h.

Referenced by Open().

◆ m_legacyFe

bool DVBChannel::m_legacyFe {false}

private

Definition at line 152 of file dvbchannel.h.

Referenced by GetBitErrorRate(), GetSignalStrength(), GetSNR(), GetUncorrectedBlockCount(), Open(), ProbeTuningParams(), and Tune().

◆ m_hasV5Stats

bool DVBChannel::m_hasV5Stats {false}

private

Definition at line 153 of file dvbchannel.h.

Referenced by GetBitErrorRate(), GetSignalStrength(), GetSNR(), GetUncorrectedBlockCount(), and Open().

◆ m_currentSys

DTVModulationSystem DVBChannel::m_currentSys

private

Definition at line 154 of file dvbchannel.h.

Referenced by Open(), and Tune().

◆ m_sysList

QList<DTVModulationSystem> DVBChannel::m_sysList

private

Definition at line 155 of file dvbchannel.h.

Referenced by Open().

◆ m_tuneLock

QMutex DVBChannel::m_tuneLock

mutableprivate

Definition at line 158 of file dvbchannel.h.

Referenced by Tune().

◆ m_hwLock

QRecursiveMutex DVBChannel::m_hwLock

mutableprivate

Definition at line 159 of file dvbchannel.h.

Referenced by Close(), IsOpen(), IsTuningParamsProbeSupported(), Open(), ProbeTuningParams(), Tune(), and ~DVBChannel().

◆ m_desiredTuning

DTVMultiplex DVBChannel::m_desiredTuning

private

Definition at line 161 of file dvbchannel.h.

Referenced by Retune(), and Tune().

◆ m_prevTuning

DTVMultiplex DVBChannel::m_prevTuning

private

Definition at line 162 of file dvbchannel.h.

Referenced by Tune().

◆ m_lastLnbDevId

uint DVBChannel::m_lastLnbDevId {(uint)~0x0}

private

Definition at line 164 of file dvbchannel.h.

Referenced by Tune().

◆ m_tuningDelay

std::chrono::milliseconds DVBChannel::m_tuningDelay { 0ms}

private

Definition at line 166 of file dvbchannel.h.

Referenced by SetSlowTuning(), and Tune().

◆ m_sigMonDelay

std::chrono::milliseconds DVBChannel::m_sigMonDelay {25ms}

private

Definition at line 167 of file dvbchannel.h.

Referenced by DVBChannel(), and GetMinSignalMonitorDelay().

◆ m_firstTune

bool DVBChannel::m_firstTune {true}

private

Definition at line 168 of file dvbchannel.h.

Referenced by Open(), and Tune().

◆ m_fdFrontend

int DVBChannel::m_fdFrontend {-1}

private

Definition at line 171 of file dvbchannel.h.

Referenced by Close(), DrainDVBEvents(), GetBitErrorRate(), GetBitErrorRateDVBv5(), GetFd(), GetSignalStrength(), GetSignalStrengthDVBv5(), GetSNR(), GetSNRDVBv5(), GetUncorrectedBlockCount(), GetUncorrectedBlockCountDVBv5(), HasLock(), IsTuningParamsProbeSupported(), Open(), ProbeTuningParams(), Tune(), and WaitForBackend().

◆ m_device

QString DVBChannel::m_device

private

Definition at line 172 of file dvbchannel.h.

Referenced by DVBChannel(), GetCardNum(), GetDevice(), and Open().

◆ m_key

QString DVBChannel::m_key

private

Definition at line 173 of file dvbchannel.h.

Referenced by DVBChannel(), GetMasterLock(), and ~DVBChannel().

◆ m_hasCrcBug

bool DVBChannel::m_hasCrcBug {false}

private

Definition at line 174 of file dvbchannel.h.

Referenced by DVBChannel(), and HasCRCBug().

◆ s_lastTuning

std::chrono::milliseconds DVBChannel::s_lastTuning = MythDate::currentMSecsSinceEpochAsDuration()

staticprivate

Definition at line 176 of file dvbchannel.h.

Referenced by Tune().

◆ m_tuneDelayLock

QMutex DVBChannel::m_tuneDelayLock

private

Definition at line 177 of file dvbchannel.h.

Referenced by Tune().

The documentation for this class was generated from the following files:

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DVBChannel()

◆ ~DVBChannel()

Member Function Documentation

◆ Open() [1/2]

◆ Close() [1/2]

◆ Init()

◆ SetPMT()

◆ SetTimeOffset()

◆ SetSlowTuning()

◆ IsOpen()

◆ GetFd()

◆ IsTuningParamsProbeSupported()

◆ GetDevice()

◆ GetCardNum()

◆ GetFrontendName()

◆ IsMaster()

◆ HasCRCBug()

◆ GetMinSignalMonitorDelay()

◆ GetRotor()

◆ HasLock()

◆ GetSignalStrength()

◆ GetSNR()

◆ GetBitErrorRate()

◆ GetUncorrectedBlockCount()

◆ GetCapabilities()

◆ CanDo()

◆ SwitchToInput()

◆ Tune() [1/7]

◆ Tune() [2/7]

◆ Retune()

◆ ProbeTuningParams()

◆ Open() [2/2]

◆ Close() [2/2]

◆ GetChanID()

◆ CheckOptions()

◆ CheckFrequency()

◆ CheckModulation()

◆ CheckCodeRate()

◆ GetMasterLock()

◆ ReturnMasterLock()

◆ GetSignalStrengthDVBv5()

◆ GetSNRDVBv5()

◆ GetBitErrorRateDVBv5()

◆ GetUncorrectedBlockCountDVBv5()

◆ DrainDVBEvents()

◆ WaitForBackend()

◆ Tune() [3/7]

◆ Tune() [4/7]

◆ Tune() [5/7]

◆ Tune() [6/7]

◆ Tune() [7/7]

Member Data Documentation

◆ m_isOpen

◆ m_diseqcSettings

◆ m_diseqcTree

◆ m_dvbCam

◆ m_frontendName

◆ m_capabilities

◆ m_extModulations

◆ m_frequencyMinimum

◆ m_frequencyMaximum

◆ m_symbolRateMinimum

◆ m_symbolRateMaximum

◆ m_version

◆ m_legacyFe

◆ m_hasV5Stats

◆ m_currentSys

◆ m_sysList

◆ m_tuneLock

◆ m_hwLock

◆ m_desiredTuning

◆ m_prevTuning