Definition of an HF frequency band (UHF, VHF). More...

#include <tsHFBand.h>

Public Member Functions
UString	bandName () const
	Get the name of the HF band as a string.

uint64_t	bandWidth (uint32_t channel) const
	Get the bandwidth of a channel in the HF band.

uint32_t	channelCount () const
	Get the number of channels in the HF band.

UString	channelList () const
	Get the list of channels in the HF band as a string.

uint32_t	channelNumber (uint64_t frequency) const
	Compute a channel number from a frequency.

UString	description (uint32_t channel, int32_t offset) const
	Return a human-readable description of a channel.

bool	empty () const
	Check if there is no channel in the HF band.

uint32_t	firstChannel () const
	Get the first channel number in the HF band.

int32_t	firstOffset (uint32_t channel) const
	Get the first allowed offset of a channel in the HF band.

uint64_t	frequency (uint32_t channel, int32_t offset=0) const
	Get the frequency of a channel in the HF band.

uint64_t	highestFrequency (bool strict=false) const
	Get the highest frequency in the HF band.

bool	inBand (uint64_t frequency, bool strict=false) const
	Check if a frequency is in the HF band.

bool	isValidChannel (uint32_t channel) const
	Check if a channel is valid in the HF band.

uint32_t	lastChannel () const
	Get the last channel number in the HF band.

int32_t	lastOffset (uint32_t channel) const
	Get the last allowed offset of a channel in the HF band.

uint64_t	lowestFrequency (bool strict=false) const
	Get the lowest frequency in the HF band.

uint32_t	nextChannel (uint32_t channel) const
	Get the next channel in the HF band.

int32_t	offsetCount (uint64_t frequency) const
	Compute an offset count from frequency (approximate if necessary)

uint64_t	offsetWidth (uint32_t channel) const
	Get the offset frequency width of a channel in the HF band.

Polarization	polarization (uint32_t channel) const
	Get the polarization of a channel in the HF band.

uint32_t	previousChannel (uint32_t channel) const
	Get the previous channel in the HF band.

Static Public Member Functions
static UString	DefaultRegion (Report &report=(ts::CerrReport::Instance()))
	Get the default region.

static UStringList	GetAllBands (const UString &region=UString(), Report &report=(ts::CerrReport::Instance()))
	Get a list of all available HF bands for a given region in the configuration file.

static UStringList	GetAllRegions (Report &report=(ts::CerrReport::Instance()))
	Get a list of all available regions from the configuration file.

static const HFBand *	GetBand (const UString &region=UString(), const UString &band=u"UHF", Report &report=(ts::CerrReport::Instance()), bool silent_band=false)
	Get the description of an HF band from the configuration file.

static void	SetDefaultRegion (const UString &region=UString(), Report &report=(ts::CerrReport::Instance()))
	Set the default region.

Detailed Description

Definition of an HF frequency band (UHF, VHF).

Each region or country has it own definitions of the frequencies bands and layouts. The most common types of frequency bands are VHF (Very High Frequency) and UHF (Ultra High Frequency) for terrestrial TV. Some countries also define predefined layouts for satellite frequency bands. This is the case for Japan with the "BS" and "CS" satellite bands.

There is a repository of known HF bands layout per country or region. This repository is read from an XML file. There is only one instance of HFBand per country or region.

See also: ts::HFBand::GetBand()

Member Function Documentation

◆ DefaultRegion()

static UString ts::HFBand::DefaultRegion ( Report & report = (ts::CerrReport::Instance()) )

static

Get the default region.

Parameters

[in,out] report Where to report errors.

Returns: The default region. This is the value of the parameter "default.region" in the TSDuck configuration file for the current application. If undefined in the configuration file, the default is "europe".

◆ SetDefaultRegion()

static void ts::HFBand::SetDefaultRegion	(	const UString &	region = `UString()`,
		Report &	report = `(ts::CerrReport::Instance())`
	)

static

Set the default region.

Parameters

[in]	region	The new region to use as default. If empty, then use the value of the parameter "default.region" in the TSDuck configuration file for the current application. If undefined in the configuration file, the default is "europe".
[in,out]	report	Where to report errors.

◆ GetAllRegions()

static UStringList ts::HFBand::GetAllRegions ( Report & report = (ts::CerrReport::Instance()) )

static

Get a list of all available regions from the configuration file.

Parameters

[in,out] report Where to report errors.

Returns: The list of all available regions.

◆ GetAllBands()

static UStringList ts::HFBand::GetAllBands	(	const UString &	region = `UString()`,
		Report &	report = `(ts::CerrReport::Instance())`
	)

static

Get a list of all available HF bands for a given region in the configuration file.

Parameters

[in]	region	The region name. If empty, then use the default region.
[in,out]	report	Where to report errors.

Returns: The list of all available regions.

◆ GetBand()

static const HFBand * ts::HFBand::GetBand	(	const UString &	region = `UString()`,
		const UString &	band = `u"UHF"`,
		Report &	report = `(ts::CerrReport::Instance())`,
		bool	silent_band = `false`
	)

static

Get the description of an HF band from the configuration file.

Parameters

[in]	region	Region of country name (not case sensitive).
[in]	band	HF band type (u"UHF", u"VHF", etc).
[in,out]	report	Where to report errors.
[in]	silent_band	If true, do not report error message if the band is not found in the file. Other errors (HF band file not found, region not found) are still reported.

Returns: A pointer to the instance for the corresponding region. If the repository contains no known band for the region, return an empty object.

◆ bandName()

UString ts::HFBand::bandName ( ) const

inline

Get the name of the HF band as a string.

Returns: The name of the HF band as a string.

◆ empty()

bool ts::HFBand::empty ( ) const

inline

Check if there is no channel in the HF band.

Returns: True if there is no channel in the HF band (typically an invalid band).

◆ firstChannel()

uint32_t ts::HFBand::firstChannel ( ) const

inline

Get the first channel number in the HF band.

Returns: The first channel number in the HF band.

◆ lastChannel()

uint32_t ts::HFBand::lastChannel ( ) const

inline

Get the last channel number in the HF band.

Returns: The last channel number in the HF band.

◆ channelCount()

uint32_t ts::HFBand::channelCount ( ) const

inline

Get the number of channels in the HF band.

Note that this cannot be computed from firstChannel() and lastChannel() since an HF band can have "holes", non-existent channels.

Returns: The number of channels in the HF band.

◆ channelList()

UString ts::HFBand::channelList ( ) const

Get the list of channels in the HF band as a string.

Returns: The list of channels in the HF band as a string.

◆ isValidChannel()

bool ts::HFBand::isValidChannel ( uint32_t channel ) const

Check if a channel is valid in the HF band.

Parameters

[in] channel Channel number.

Returns: True if channel is valid, false otherwise.

◆ nextChannel()

uint32_t ts::HFBand::nextChannel ( uint32_t channel ) const

Get the next channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The channel number after channel. Can be different from channel + 1 when there are "holes" in the HF band. Return zero on error (invalid channel).

◆ previousChannel()

uint32_t ts::HFBand::previousChannel ( uint32_t channel ) const

Get the previous channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The channel number before channel. Can be different from channel - 1 when there are "holes" in the HF band. Return zero on error (invalid channel).

◆ lowestFrequency()

uint64_t ts::HFBand::lowestFrequency ( bool strict = false ) const

Get the lowest frequency in the HF band.

Parameters

[in] strict If true, frequency must be strictly inside the allowed offset range of a channel. When false, only check that the frequency is inside the global band.

Returns: The frequency in Hz.

◆ highestFrequency()

uint64_t ts::HFBand::highestFrequency ( bool strict = false ) const

Get the highest frequency in the HF band.

Parameters

[in] strict If true, frequency must be strictly inside the allowed offset range of a channel. When false, only check that the frequency is inside the global band.

Returns: The frequency in Hz.

◆ frequency()

uint64_t ts::HFBand::frequency	(	uint32_t	channel,
		int32_t	offset = `0`
	)		const

Get the frequency of a channel in the HF band.

Parameters

[in]	channel	Channel number.
[in]	offset	Optional offset number.

Returns: The frequency in Hz or zero on error (invalid channel).

◆ bandWidth()

uint64_t ts::HFBand::bandWidth ( uint32_t channel ) const

Get the bandwidth of a channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The channel width in Hz or zero on error (invalid channel).

◆ offsetWidth()

uint64_t ts::HFBand::offsetWidth ( uint32_t channel ) const

Get the offset frequency width of a channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The offset frequency width in Hz.

◆ firstOffset()

int32_t ts::HFBand::firstOffset ( uint32_t channel ) const

Get the first allowed offset of a channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The first allowed offset for channel.

◆ lastOffset()

int32_t ts::HFBand::lastOffset ( uint32_t channel ) const

Get the last allowed offset of a channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The last allowed offset for channel.

◆ polarization()

Polarization ts::HFBand::polarization ( uint32_t channel ) const

Get the polarization of a channel in the HF band.

Parameters

[in] channel Channel number.

Returns: The polarization for channel. If POL_NONE, then no polarization in defined in the band.

◆ channelNumber()

uint32_t ts::HFBand::channelNumber ( uint64_t frequency ) const

Compute a channel number from a frequency.

Parameters

[in] frequency Frequency in Hz.

Returns: Channel number or zero on error.

◆ offsetCount()

int32_t ts::HFBand::offsetCount ( uint64_t frequency ) const

Compute an offset count from frequency (approximate if necessary)

Parameters

[in] frequency Frequency in Hz.

Returns: Offset count (positive or negative).

◆ inBand()

bool ts::HFBand::inBand	(	uint64_t	frequency,
		bool	strict = `false`
	)		const

Check if a frequency is in the HF band.

Parameters

[in]	frequency	Frequency in Hz.
[in]	strict	If true, frequency must be strictly inside the allowed offset range of a channel. When false, only check that the frequency is inside the global band.

Returns: True if the frequency is in the HF band.

◆ description()

UString ts::HFBand::description	(	uint32_t	channel,
		int32_t	offset
	)		const

Return a human-readable description of a channel.

Parameters

[in]	channel	Channel number.
[in]	offset	Channel offset count. Displayed only if non-zero.

Returns: Channel description.

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

tsHFBand.h

Public Member Functions

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ DefaultRegion()

◆ SetDefaultRegion()

◆ GetAllRegions()

◆ GetAllBands()

◆ GetBand()

◆ bandName()

◆ empty()

◆ firstChannel()

◆ lastChannel()

◆ channelCount()

◆ channelList()

◆ isValidChannel()

◆ nextChannel()

◆ previousChannel()

◆ lowestFrequency()

◆ highestFrequency()

◆ frequency()

◆ bandWidth()

◆ offsetWidth()

◆ firstOffset()

◆ lastOffset()

◆ polarization()

◆ channelNumber()

◆ offsetCount()

◆ inBand()

◆ description()