Represents a LIGO data channel. More...

#include <nds.hh>

Inheritance diagram for NDS::abi_0::channel:

Classes
class	hash_type
	The hash_type represents a channel hash. The channel hash is an hash of the NDS2 channel list. It can be used by appliations to determine if a channel list has changed. More...

Public Types
enum	channel_type { CHANNEL_TYPE_UNKNOWN = 0, CHANNEL_TYPE_ONLINE = ( 1 << 0 ), CHANNEL_TYPE_RAW = ( 1 << 1 ), CHANNEL_TYPE_RDS = ( 1 << 2 ), CHANNEL_TYPE_STREND = ( 1 << 3 ), CHANNEL_TYPE_MTREND = ( 1 << 4 ), CHANNEL_TYPE_TEST_POINT = ( 1 << 5 ), CHANNEL_TYPE_STATIC = ( 1 << 6 ) }

enum	data_type { DATA_TYPE_UNKNOWN = 0, DATA_TYPE_INT16 = ( 1 << 0 ), DATA_TYPE_INT32 = ( 1 << 1 ), DATA_TYPE_INT64 = ( 1 << 2 ), DATA_TYPE_FLOAT32 = ( 1 << 3 ), DATA_TYPE_FLOAT64 = ( 1 << 4 ), DATA_TYPE_COMPLEX32, DATA_TYPE_UINT32 = ( 1 << 6 ) }
	Defines the internal data representation. More...

typedef double	sample_rate_type
	Defines the sample rate type.

typedef float	signal_gain_type
	Defines the gain type.

typedef float	signal_slope_type
	Defines the slope type.

typedef float	signal_offset_type
	Defines the offset type.

typedef size_t	size_type
	Defines sizes when dealing with channels.

typedef std::vector< std::string >	channel_names_type
	A vector of channel names.

Public Member Functions
DLL_EXPORT	channel ()
	Default constructor. More...

DLL_EXPORT	channel (const channel &Source)
	Copy constructor. More...

DLL_EXPORT	channel (const std::string &Name, channel_type Type, data_type DataType, sample_rate_type SampleRate, signal_gain_type Gain, signal_slope_type Slope, signal_offset_type Offset, std::string Units)
	Create a channel object. More...

DLL_EXPORT const std::string &	Name () const
	Return the channel name. More...

DLL_EXPORT std::string	NameLong () const
	Return the name with additional information. More...

DLL_EXPORT channel_type	Type () const
	Return the type of the channel. More...

DLL_EXPORT data_type	DataType () const
	Return the data type of the channel. More...

DLL_EXPORT size_type	DataTypeSize () const
	Return the size in bytes of an individual sample from the channel. More...

DLL_EXPORT sample_rate_type	SampleRate () const
	Return the sample rate of the channel. More...

DLL_EXPORT signal_gain_type	Gain () const
	Return the gain of the channel. More...

DLL_EXPORT signal_slope_type	Slope () const
	Return the slope of the channel. More...

DLL_EXPORT signal_offset_type	Offset () const
	Return the offset of the channel. More...

DLL_EXPORT const std::string &	Units () const
	Return the units of this channel. More...

DLL_EXPORT void	swap (channel &Source)
	Swap this channel with another. More...

Static Public Member Functions
static DLL_EXPORT channel_type	convert_daq_chantype (int ChanType)
	Convert from the legacy daqd channel types to a channel_type enum. More...

static DLL_EXPORT data_type	convert_daq_datatype (int DataType)
	Convert from the legacy daqd data types to a data_type enum. More...

static DLL_EXPORT const std::string &	ToString (channel_type ChannelType)
	Return a string representatino of the given channel_type. More...

static DLL_EXPORT const std::string &	ToString (data_type DataType)
	Return a string representatino of the given data_type. More...

static DLL_EXPORT bool	IsSecondTrend (const std::string &Name)
	Check the channel name to see if it is a second trend. More...

static DLL_EXPORT bool	IsMinuteTrend (const std::string &Name)
	Check the channel name to see if it is a minute trend. More...

Static Public Attributes
static DLL_EXPORT const channel_type	DEFAULT_CHANNEL_MASK
	The combination of all valid channel types.

static DLL_EXPORT const data_type	DEFAULT_DATA_MASK
	The combinatino of all valid data types.

static DLL_EXPORT const sample_rate_type	MIN_SAMPLE_RATE = 0.0f
	Smallest sample rate possible.

static DLL_EXPORT const sample_rate_type	MAX_SAMPLE_RATE = 1e12f
	Largest sample rate possible.

Detailed Description

Represents a LIGO data channel.

A channel encasulates the meta data of LIGO data. It has a name and parameters.

Member Enumeration Documentation

enum NDS::abi_0::channel::channel_type

The available channel types

Enumerator
CHANNEL_TYPE_UNKNOWN	Unknown.
CHANNEL_TYPE_ONLINE	Online channel.
CHANNEL_TYPE_RAW	Raw channel.
CHANNEL_TYPE_RDS	Reduced data set.
CHANNEL_TYPE_STREND	Second trend.
CHANNEL_TYPE_MTREND	Minute trend.
CHANNEL_TYPE_TEST_POINT	Test point data.
CHANNEL_TYPE_STATIC	Static data.

enum NDS::abi_0::channel::data_type

Defines the internal data representation.

Enumerator
DATA_TYPE_UNKNOWN	Unkown.
DATA_TYPE_INT16	16 bit signed integer
DATA_TYPE_INT32	32 bit signed integer
DATA_TYPE_INT64	64 bit signed integer
DATA_TYPE_FLOAT32	32 bit float value
DATA_TYPE_FLOAT64	64 bit float value
DATA_TYPE_COMPLEX32	Complex value, two 32 bit floats.
DATA_TYPE_UINT32	32 bit unsigned integer value

Constructor & Destructor Documentation

NDS::abi_0::channel::channel ( )

Default constructor.

Returns: New instance of a channel object

NDS::abi_0::channel::channel ( const channel & Source )

default

Copy constructor.

Parameters

[in] Source The object to be copied

Returns: New instance of a channel object

NDS::abi_0::channel::channel	(	const std::string &	Name,
		channel_type	Type,
		data_type	DataType,
		sample_rate_type	SampleRate,
		signal_gain_type	Gain,
		signal_slope_type	Slope,
		signal_offset_type	Offset,
		std::string	Units
	)

Create a channel object.

The channel object represents a stream a LIGO data.

Parameters

[in]	Name	The name of the channel as a string.
[in]	Type	The channel type (RAW, ONLINE, ...).
[in]	DataType	The data_type that of the channel.
[in]	SampleRate	Rate that the channel was recorded at.
[in]	Gain	Gain of the channel.
[in]	Slope	Slope of the channel.
[in]	Offset	Offset of the channel.
[in]	Units	Units of the channel as a string.

Returns: New instance of a channel object

Member Function Documentation

channel::channel_type NDS::abi_0::channel::convert_daq_chantype ( int ChanType )

static

Convert from the legacy daqd channel types to a channel_type enum.

Parameters

[in] ChanType The daqd channel type value

Returns: The corresponding channel_type enum

channel::data_type NDS::abi_0::channel::convert_daq_datatype ( int DataType )

static

Convert from the legacy daqd data types to a data_type enum.

Parameters

[in] DataType The daqd data type value

Returns: The corresponding data_type enum

channel::data_type NDS::abi_0::channel::DataType ( ) const

inline

Return the data type of the channel.

Returns: A data_type representing the data type of the channel.

channel::size_type NDS::abi_0::channel::DataTypeSize ( ) const

inline

Return the size in bytes of an individual sample from the channel.

Returns: A size_type value giving the size of an individual sample of this channel.

channel::signal_gain_type NDS::abi_0::channel::Gain ( ) const

inline

Return the gain of the channel.

Returns: The gain as a signal_gain_type.

bool NDS::abi_0::channel::IsMinuteTrend ( const std::string & Name )

inlinestatic

Check the channel name to see if it is a minute trend.

Parameters

[in] Name A channel name, as a string.

Returns: true if Name ends in ",m-trend", else false.

bool NDS::abi_0::channel::IsSecondTrend ( const std::string & Name )

inlinestatic

Check the channel name to see if it is a second trend.

Parameters

[in] Name A channel name, as a string.

Returns: true if Name ends in ",s-trend", else false.

const std::string & NDS::abi_0::channel::Name ( ) const

inline

Return the channel name.

Returns: The name as a string.

std::string NDS::abi_0::channel::NameLong ( ) const

Return the name with additional information.

Returns: The name, rate, type, and data type as a string.

Remarks: Returns a string such as "<name (sample rate, type, data type)>"

channel::signal_offset_type NDS::abi_0::channel::Offset ( ) const

inline

Return the offset of the channel.

Returns: The offset as a signal_offset_type.

channel::sample_rate_type NDS::abi_0::channel::SampleRate ( ) const

inline

Return the sample rate of the channel.

Returns: The sample rate as a sample_rate_type.

channel::signal_slope_type NDS::abi_0::channel::Slope ( ) const

inline

Return the slope of the channel.

Returns: The slope as a signal_slope_type.

void NDS::abi_0::channel::swap ( channel & Source )

Swap this channel with another.

Switches all values of this channel with the input channel Source.

Parameters

[in,out] Source A channel to swap values with.

const std::string & NDS::abi_0::channel::ToString ( channel_type ChannelType )

static

Return a string representatino of the given channel_type.

Parameters

[in] ChannelType Input channel type

Returns: A string representing ChannelType

const std::string & NDS::abi_0::channel::ToString ( data_type DataType )

static

Return a string representatino of the given data_type.

Parameters

[in] DataType Input data type

Returns: A string representing DataType

channel::channel_type NDS::abi_0::channel::Type ( ) const

inline

Return the type of the channel.

Returns: Returns a channel_type representing the channel type.

const std::string & NDS::abi_0::channel::Units ( ) const

inline

Return the units of this channel.

Returns: The units as a string.

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

src/libndscxx/module/nds_channel.hh
src/libndscxx/module/nds_channel.cc

Classes

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation