Converts floating point values to N-bit PSRFITS search-mode format. More...

#include <FITSDigitizer.h>

Inheritance diagram for dsp::FITSDigitizer:

Public Member Functions
	FITSDigitizer (unsigned _nbit)
	Default constructor.

	~FITSDigitizer ()
	Default destructor.

unsigned	get_nbit () const

void	set_rescale_samples (unsigned nsamp)
	Set the number of samples to rescale before digitization. More...

void	set_rescale_nblock (unsigned nsamp)
	Set the number of blocks to remember when computing scales. More...

void	set_rescale_constant (bool rconst)
	If true, leave scales/offsets constant after first measurement.

void	set_upper_sideband_output (bool usb)
	Set the channel ordering of the output.

void	pack ()
	Pack the data. More...

uint64_t	get_minimum_samples ()
	Return minimum samples.

void	get_scales (std::vector< float > dat_scl, std::vector< float > dat_offs)

void	set_engine (Engine *)

Public Member Functions inherited from dsp::Digitizer
	Digitizer (const char *name="Digitizer")
	Constructor.

virtual void	set_nbit (int)
	Set the number of bits per sample (FITS BITPIX convention)

int	get_nbit () const
	Get the number of bits per sample (FITS BITPIX convention)

virtual void	prepare ()
	Copy the input attributes to the output.

virtual void	reserve ()
	Resize the output.

Public Member Functions inherited from dsp::Transformation< TimeSeries, BitSeries >
	Transformation (const char *_name, Behaviour _type)
	All sub-classes must specify name and capacity for inplace operation.

virtual	~Transformation ()
	Destructor.

void	reserve ()
	Set the size of the output to that of the input by default.

void	set_input (const TimeSeries *input)
	Set the container from which input data will be read.

void	set_output (BitSeries *output)
	Set the container into which output data will be written.

Behaviour	get_type () const
	Return the Transformation type.

virtual void	set_buffering_policy (BufferingPolicy *policy)
	Set the policy for buffering input and/or output data.

bool	has_buffering_policy () const
	Returns true if buffering_policy is set.

BufferingPolicy *	get_buffering_policy () const

void	reset_min_samps ()
	Reset minimum_samps_can_process.

std::string	name (const std::string &function) const
	String preceding output in verbose mode.

virtual void	set_cerr (std::ostream &os) const
	Set verbosity ostream.

Public Member Functions inherited from dsp::Operation
	Operation (const char *name)
	All sub-classes must specify a unique name. More...

	Operation (const Operation &)
	Copy constructor.

virtual	~Operation ()
	Virtual destructor.

virtual bool	operate ()
	Call this method to operate on data Returns false on failure. More...

virtual void	add_extensions (Extensions *)
	Add any extensions.

virtual void	combine (const Operation *)
	Combine accumulated results with another operation. More...

virtual void	report () const
	Report operation statistics.

virtual void	reset ()
	Reset accumulated results to intial values. More...

std::string	get_name () const
	Return the unique name of this operation.

double	get_total_time () const
	Return the total time spent on this Operation in seconds.

double	get_elapsed_time () const
	Get the time spent in the last invocation of operate()

virtual uint64_t	get_total_weights () const
	Return the total number of timesample weights encountered. More...

virtual uint64_t	get_discarded_weights () const
	Return the number of invalid timesample weights encountered.

int	get_id ()
	Inquire the unique instantiation id.

virtual Function	get_function () const
	Get the function classification of this operation.

virtual double	get_delay_time () const
	Get the time delay of this operation, if any, in seconds.

virtual void	set_scratch (Scratch *)
	Set the scratch space.

bool	scratch_was_set () const

virtual uint64_t	bytes_storage () const
	The number of bytes of additional storage used by the operation.

virtual uint64_t	bytes_scratch () const
	The number of bytes of scratch space used by the operation. More...

Public Member Functions inherited from OwnStream
	OwnStream (const OwnStream &)

const OwnStream &	operator= (const OwnStream &)

virtual void	set_cout (std::ostream &) const

Public Member Functions inherited from Reference::Able
	Able (const Able &)

Able &	operator= (const Able &)

unsigned	get_reference_count () const

Public Member Functions inherited from Reference::HeapTracked
	HeapTracked (const HeapTracked &)

HeapTracked &	operator= (const HeapTracked &)

bool	__is_on_heap () const

Public Member Functions inherited from dsp::HasInput< TimeSeries >
virtual	~HasInput ()
	Destructor.

const TimeSeries *	get_input () const
	Return pointer to the container from which input data will be read.

bool	has_input () const
	Returns true if input is set.

Public Member Functions inherited from dsp::HasOutput< BitSeries >
virtual	~HasOutput ()
	Destructor.

virtual BitSeries *	get_output () const
	Return pointer to the container into which output data will be written.

bool	has_output () const
	Returns true if output is set.

Public Attributes
Callback< FITSDigitizer * >	update

Public Attributes inherited from dsp::Transformation< TimeSeries, BitSeries >
Callback< Transformation * >	pre_transformation
	Functions called before the transformation takes place.

Callback< Transformation * >	post_transformation
	Functions called after the transformation takes place.

Protected Member Functions
void	set_nbit (unsigned)
	Set the number of bits per sample.

void	rescale_pack ()
	rescale input based on mean / variance

void	init ()

void	measure_scale ()

void	set_digi_scales ()

Protected Member Functions inherited from dsp::Digitizer
virtual void	transformation ()
	Initialize and resize the output before calling unpack.

Protected Member Functions inherited from dsp::Transformation< TimeSeries, BitSeries >
virtual bool	can_operate ()
	Return false if the input doesn't have enough data to proceed.

virtual void	operation ()
	Define the Operation pure virtual method.

virtual void	vchecks ()
	Makes sure input & output are okay before calling transformation()

Protected Member Functions inherited from dsp::Operation
virtual void	set_name (const std::string &_name)
	Set the name!

int	timers_index (const std::string &op_name)
	Returns the index in the 'timers' array of a particular timer.

Protected Member Functions inherited from Reference::Able
Handle *	__reference (bool active) const

void	__dereference (bool auto_delete=true) const

Protected Attributes
unsigned	rescale_nsamp
	keep track of first time through scale-measuring procedure

unsigned	rescale_idx

unsigned	rescale_nblock

unsigned	rescale_counter

bool	rescale_constant
	Keep scaling/offset constant after first estimate.

float	digi_mean

float	digi_scale

int	digi_min

int	digi_max

double *	freq_totalsq
	arrays for accumulating and storing scales

double *	freq_total

double *	scale

double *	offset

Reference::To< Engine >	engine

bool	upper_sideband_output

Protected Attributes inherited from dsp::Digitizer
int	nbit

Protected Attributes inherited from dsp::Transformation< TimeSeries, BitSeries >
Reference::To< BufferingPolicy >	buffering_policy
	The buffering policy in place (if any)

int64_t	minimum_samps_can_process
	If input doesn't have this many samples, operate() returns false.

Protected Attributes inherited from dsp::Operation
Scratch *	scratch
	Shared scratch space, if needed.

bool	set_scratch_called

std::string	name
	Operation name.

uint64_t	discarded_weights
	Number of time sample weights encountered that are flagged invalid.

uint64_t	total_weights
	Total number of time sample weights encountered.

RealTimer	optime
	Stop watch records the amount of time spent performing this operation.

int	id
	Unique instantiation id.

bool	prepared
	Set true when preparation optimizations are completed.

Protected Attributes inherited from dsp::HasInput< TimeSeries >
Reference::To< const TimeSeries >	input
	Container from which input data will be read.

Protected Attributes inherited from dsp::HasOutput< BitSeries >
Reference::To< BitSeries >	output
	Container into which output data will be written.

Additional Inherited Members
Public Types inherited from dsp::Operation
enum	Function { Producer, Procedural, Structural }
	The function of the operator. More...

Static Public Member Functions inherited from Reference::Able
static size_t	get_instance_count ()

Static Public Member Functions inherited from Reference::HeapTracked
static void *	operator new (size_t size, void *ptr=0)

static void	operator delete (void location, void ptr)

static void	operator delete (void *location)

static size_t	get_heap_queue_size ()

Static Public Attributes inherited from dsp::Operation
static bool	record_time = false
	Global flag enables stopwatch to record the time spent operating. More...

static bool	report_time = true
	Global flag enables report of time spent in operation on descruction. More...

static bool	verbose = false
	Global verbosity flag.

static int	operation_status = 0
	Operations can set this to non-zero in operation() if they fail.

static bool	check_state = true
	Operations should perform internal consistency checks.

static int	instantiation_count = 0
	Counts how many Operation instantiations there have been Used for setting the unique instantiation ID. More...

Detailed Description

Converts floating point values to N-bit PSRFITS search-mode format.

Member Function Documentation

◆ pack()

void dsp::FITSDigitizer::pack ( )

virtual

Pack the data.

PSRFITS search mode data are in TPF order, whereas the native buffer class (DataSeries) is in FPT(d).

Implements dsp::Digitizer.

References dsp::TimeSeries::OrderFPT, and dsp::TimeSeries::OrderTFP.

◆ set_rescale_nblock()

void dsp::FITSDigitizer::set_rescale_nblock ( unsigned nsamp )

Set the number of blocks to remember when computing scales.

The default is 1, corresponding to no memory.

Referenced by dsp::LoadToFITS::construct().

◆ set_rescale_samples()

void dsp::FITSDigitizer::set_rescale_samples ( unsigned nsamp )

Set the number of samples to rescale before digitization.

Set the rescaling interval in samples.

The default is 0, i.e. rescaling must be done elsewhere.

Referenced by dsp::LoadToFITS::construct().

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

FITSDigitizer.h
FITSDigitizer.C

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ pack()

◆ set_rescale_nblock()

◆ set_rescale_samples()