frontend

package
v0.1.5 Latest Latest
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 Go to latest Published: Feb 8, 2024 License: BSD-3-Clause Imports: 9 Imported by: 4

Documentation

Overview

Package frontend provides interface to Linux DVB frontend device

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func SecParam 

func SecParam(freq int64, polarization rune) (f uint32, t Tone, v Voltage)

SecParam calculates intermediate frequency, tone and voltage for given absolute frequency (HZ) and polarization ('h' or 'v').

Types

type API3 

type API3 struct {
	Device
}

API3 provides Linux DVB API v3 interface to frontend device

func (API3) BER 

func (f API3) BER() (ber uint32, err error)

func (API3) Info 

func (f API3) Info() (*Info, error)

func (API3) SNR 

func (f API3) SNR() (snr int16, err error)

func (API3) SignalStrength 

func (f API3) SignalStrength() (ss int16, err error)

func (API3) Status 

func (f API3) Status() (status Status, err error)

func (API3) UncorrectedBlocks 

func (f API3) UncorrectedBlocks() (ublocks uint32, err error)

func (API3) WaitEvent 

func (f API3) WaitEvent(ev *Event, deadline time.Time) (bool, error)

WaitEvent can return dvb.ErrOverflow. If deadline is non zero time WaitEvent returns true if it doesn't receive any event up to deatline.

type Bandwidth 

type Bandwidth uint32
const (
	Bandwidth8MHz Bandwidth = iota
	Bandwidth7MHz
	Bandwidth6MHz
	BandwidthAuto
	Bandwidth5Mhz
	Bandwidth10Mhz
	Bandwidth1712kHz
)

func (Bandwidth) String 

func (b Bandwidth) String() string

type Caps 

type Caps uint32
const (
	CanInversionAuto Caps = 1 << iota
	CanFEC12
	CanFEC23
	CanFEC34
	CanFEC45
	CanFEC56
	CanFEC67
	CanFEC78
	CanFEC89
	CanFECAuto
	CanQPSK
	CanQAM16
	CanQAM32
	CanQAM64
	CanQAM128
	CanQAM256
	CanQAMAuto
	CanTxModeAuto
	CanBandwidthAuto
	CanGuardAuto
	CanHierarchyAuto
	Can8VSB
	Can16VSB
	HasExtendedCaps
)
const (
	CanTurboFEC Caps = 0x8000000 << iota
	Can2GModulation
	NeedsBending
	CanRecover
	CanMuteTS
)
const IsStupid Caps = 0

func (Caps) String 

func (c Caps) String() string

Returns string representation of Caps.

type Device 

type Device struct {
	// contains filtered or unexported fields
}

func Open 

func Open(filepath string) (d Device, err error)

func OpenRO 

func OpenRO(filepath string) (d Device, err error)

func (Device) Bandwidth 

func (d Device) Bandwidth() (uint32, error)

Bandwidth returns bandwidth in Hz

func (Device) Clear 

func (d Device) Clear() error

func (Device) Close 

func (d Device) Close() error

func (Device) CodeRateHP 

func (d Device) CodeRateHP() (dvb.CodeRate, error)

func (Device) CodeRateLP 

func (d Device) CodeRateLP() (dvb.CodeRate, error)

func (Device) DeliverySystem 

func (d Device) DeliverySystem() (dvb.DeliverySystem, error)

func (Device) Fd 

func (d Device) Fd() uintptr

func (Device) Frequency 

func (d Device) Frequency() (uint32, error)

func (Device) Guard 

func (d Device) Guard() (dvb.Guard, error)

func (Device) Hierarchy 

func (d Device) Hierarchy() (dvb.Hierarchy, error)

func (Device) InnerFEC 

func (d Device) InnerFEC() (dvb.CodeRate, error)

func (Device) Inversion 

func (d Device) Inversion() (dvb.Inversion, error)

func (Device) Modulation 

func (d Device) Modulation() (dvb.Modulation, error)

func (Device) Pilot 

func (d Device) Pilot() (dvb.Pilot, error)

func (Device) Rolloff 

func (d Device) Rolloff() (dvb.Rolloff, error)

func (Device) SetBandwidth 

func (d Device) SetBandwidth(hz uint32) error

func (Device) SetCodeRateHP 

func (d Device) SetCodeRateHP(r dvb.CodeRate) error

func (Device) SetCodeRateLP 

func (d Device) SetCodeRateLP(r dvb.CodeRate) error

func (Device) SetDeliverySystem 

func (d Device) SetDeliverySystem(ds dvb.DeliverySystem) error

func (Device) SetFrequency 

func (d Device) SetFrequency(f uint32) error

func (Device) SetGuard 

func (d Device) SetGuard(g dvb.Guard) error

func (Device) SetHierarchy 

func (d Device) SetHierarchy(h dvb.Hierarchy) error

func (Device) SetInnerFEC 

func (d Device) SetInnerFEC(r dvb.CodeRate) error

func (Device) SetInversion 

func (d Device) SetInversion(i dvb.Inversion) error

func (Device) SetModulation 

func (d Device) SetModulation(m dvb.Modulation) error

func (Device) SetPilot 

func (d Device) SetPilot(p dvb.Pilot) error

func (Device) SetRolloff 

func (d Device) SetRolloff(r dvb.Rolloff) error

func (Device) SetSymbolRate 

func (d Device) SetSymbolRate(bd uint32) error

func (Device) SetTone 

func (d Device) SetTone(t Tone) error

func (Device) SetTxMode 

func (d Device) SetTxMode(m dvb.TxMode) error

func (Device) SetVoltage 

func (d Device) SetVoltage(v Voltage) error

func (Device) Stat 

func (d Device) Stat() (*Stat, error)

func (Device) SymbolRate 

func (d Device) SymbolRate() (uint32, error)

func (Device) Tone 

func (d Device) Tone() (Tone, error)

func (Device) Tune 

func (d Device) Tune() error

func (Device) TxMode 

func (d Device) TxMode() (dvb.TxMode, error)

func (Device) Version 

func (d Device) Version() (major, minor int, err error)

func (Device) Voltage 

func (d Device) Voltage() (Voltage, error)

type Error 

type Error struct {
	Op   string
	What string
	Err  error
}

func (Error) Error 

func (e Error) Error() string

type Event 

type Event struct {
	// contains filtered or unexported fields
}

func (*Event) ParamDVBC 

func (e *Event) ParamDVBC() *ParamDVBC

func (*Event) ParamDVBS 

func (e *Event) ParamDVBS() *ParamDVBS

func (*Event) ParamDVBT 

func (e *Event) ParamDVBT() *ParamDVBT

func (*Event) Status 

func (e *Event) Status() Status

type Info 

type Info struct {
	Name          [128]byte
	Type          Type // DEPRECATED. Use Device.DeliverySystem() instead
	FreqMin       uint32
	FreqMax       uint32
	FreqStepSize  uint32
	FreqTolerance uint32
	SRMin         uint32
	SRMax         uint32
	SRTolerance   uint32 // ppm
	NotiferDelay  uint32 // DEPRECATED
	Caps          Caps
}

func (*Info) String 

func (i *Info) String() string

type Param 

type Param struct {
	// contains filtered or unexported fields
}

func (Param) Counter 

func (p Param) Counter() uint64

func (Param) Decibel 

func (p Param) Decibel() float64

func (Param) Format 

func (p Param) Format(f fmt.State, _ rune)

func (Param) Relative 

func (p Param) Relative() float64

func (Param) Scale 

func (p Param) Scale() Scale

type ParamDVBC 

type ParamDVBC struct {
	Freq       uint32        // frequency in Hz
	Inversion  dvb.Inversion // spectral inversion
	SymbolRate uint32
	CodeRate   dvb.CodeRate
	Modulation dvb.Modulation
}

func (*ParamDVBC) Tune 

func (p *ParamDVBC) Tune(f API3) error

type ParamDVBS 

type ParamDVBS struct {
	Freq       uint32        // frequency in Hz
	Inversion  dvb.Inversion // spectral inversion
	SymbolRate uint32
	InnerFEC   dvb.CodeRate
}

func (*ParamDVBS) Tune 

func (p *ParamDVBS) Tune(f API3) error

type ParamDVBT 

type ParamDVBT struct {
	Freq       uint32        // frequency in Hz
	Inversion  dvb.Inversion // spectral inversion
	Bandwidth  Bandwidth
	CodeRateHP dvb.CodeRate
	CodeRateLP dvb.CodeRate
	Modulation dvb.Modulation
	TxMode     dvb.TxMode
	Guard      dvb.Guard
	Hierarchy  dvb.Hierarchy
}

func DefaultParamDVBT 

func DefaultParamDVBT(c Caps, country string) *ParamDVBT

DefaultParamDVBT returns pointer to ParamDVBT initialized according to regulations in specific country. TODO: DefaultParamDVBT always setup ParamDVBT for Poland. Add support for other countries.

func (*ParamDVBT) Tune 

func (p *ParamDVBT) Tune(f API3) error

type Scale 

type Scale byte
const (
	ScaleNotAvailable Scale = iota
	ScaleDecibel
	ScaleRelative
	ScaleCounter
)

func (Scale) String 

func (s Scale) String() string

type Stat 

type Stat struct {
	Signal     []Param // Signal strength level at the analog part of the tuner or of the demod.
	CNR        []Param // Signal to Noise ratio for the main carrier.
	PreErrBit  []Param // Number of bit errors before FEC on the inner coding block (Viterbi, LDPC, ...).
	PreTotBit  []Param // Number of bits received before the inner code block.
	PostErrBit []Param // Number of bit errors after FEC done by inner code block (Viterbi, LDPC, ...).
	PostTotBit []Param // Number of bits received after the inner coding.
	ErrBlk     []Param // Number of block errors after the outer FEC (Reed-Solomon, ...).
	TotBlk     []Param // Total number of blocks received.
}

type Status 

type Status uint32
const (
	HasSignal  Status = 1 << iota // found something above the noise level
	HasCarrier                    // found a DVB signal
	HasViterbi                    // FEC is stable
	HasSync                       // found sync bytes
	HasLock                       // everything's working...
	Timedout                      // no lock within the last ~2 seconds
	Reinit                        // frontend was reinitialized, application is recommned to reset DiSEqC, tone and parameters
)

func (Status) String 

func (s Status) String() string

type Tone 

type Tone uint32

Satellite equipment control (SEC) tone 

const (
	ToneOn Tone = iota
	ToneOff
)

type Type 

type Type uint32
const (
	DVBS Type = iota
	DVBC
	DVBT
	ATSC
)

func (Type) String 

func (t Type) String() string

type Voltage 

type Voltage uint32

Satellite equipment control (SEC) voltage 

const (
	Voltage13 Voltage = iota
	Voltage18
	VoltageOff
)

Source Files

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