TSignalBuffer Class — DSP Master

class TSignalBuffer : public TSignal;

Keeps signal processing data pipe synchronized.

Use the component to synchronize data processing pipe, where you need a large input buffer to perform filtering or a large scrolling buffer for signal analysis. The output data length is specified with the value of the Length property. This value may be bigger or smaller then the value of Input.Length property. The size of the buffer must be at least Max(Input.Length,Length). The size of the buffer can also be set automatically by the component, if you set AutoBufferSize to True.

Constructors

Name	Description
TSignalBuffer (2)

Destructors

Name	Description
~TSignalBuffer

Properties

Name	Type	Description
Active	bool	Set active to false to suppress the propagation of the Pull request and the subsequent call to the Update method.
BandWidth	double	Return the bandwidth of the signal.
BandwidthH	double	Returns the upper bandwidth edge of the signal.
BandwidthL	double	Returns the lower bandwidth edge of the signal.
BlockAssign	bool	Block streaming of specific properties when storing only a "template".
BufferSizeLimit	int	Limits the maximum buffer size, if AutoBufferSize is True.
BufferType	TBufferType	Defines the type of the buffer.
ChannelCount	int	Get or set the number of channels multiplexed in the data property.
Complex	bool	Set this property to true, to request computation using complex numbers.
Continuous	bool	If True, the component will pass on the udpate request to the connected component.
Data	TVec*	Stores the result of the processing.
Dt	double	Time between two consecutive samples.
EditorActive	bool	Returns True, if the component editor is displayed.
FloatPrecision	TMtxFloatPrecision	Set this property to request computation in 32bit/64bit precision with real/complex numbers.
FloatPrecisionLock	bool	Set this property to true to lock changes to FloatPrecision property.
HzRes	double	Frequency resolution obtained, if an FFT algorithm would be run on the data.
IncrementStep	double	Defines the minimum factor by which the buffer size will be increased.
Input	TSignal*
Inputs	TSignalCollection*
IsDouble	bool	Set this property to false, to request computation in 32bit floating point precision, 64bit, if true.
ItemNumber	int	Number to label the object when it is an item in the List.
Length	int	Get or set the length of the signal in samples.
Marks	TMarkList*	Stores the time stamps and amplitude of selected samples.
MaxAmplt	double	Stores the maximum amplitude of the signal found by the MinMax method.
MaxX	double	Use the MaxX property to store the time stamp (in seconds) of the right most sample.
MinAmplt	double	Stores the minimum amplitude of the signal found by the MinMax method.
MinX	double	Use the MinX property to store the time stamp of the left-most sample.
MultiChannel	bool	Set MultiChannel to True, if Inputs property will be published, and Input property will remain hidden.
Name	DewString
OnAfterUpdate	tNotifyEvent	The event is triggered after the call to the Update method.
OnBeforeUpdate	tNotifyEvent	The event is triggered just before the call to the Update method.
OnDisplayUpdate	tNotifyEvent	The event is triggered after the OnAfterUpdate event. Use this event to update any associated charts or graphs or result tables.
OnGetInput	tNotifyEvent	If the Input property is not assigned, the component will call OnGetInput.
OnNotifyUpdate	tNotifyEvent	The event is called after a call to InternalUpdate, OnAfterUpdate and OnDisplayUpdate from within the Update method.
OnParameterUpdate	tNotifyEvent	The event is triggered when ParamUpdate method is called. The ParamUpdate method is usually called by component editors when a value was changed by the user and the editor was "Live".
Overlapping	double	Overlapping defines the percent of previously read data to be read again.
PipeDirty	bool
PipeState	TPipeState	Returns the state of the pipe after the last update.
Reference	TReferenceList*	Stores a list of components that have to be notified, when this component is destroyed.
SamplingFrequency	double	Defines the sampling frequency of the signal.
SamplingTime	double	The length of the signal in seconds.
StrideLength	int	StrideLength defines the number of samples that will be skipped between consecutive reads from the buffer.
SuspendNotifyUpdate	bool	Set this property to True, to prevent calling OnNotifyUpdate from the Update Method.
UsesInputs	bool	Set it to True to indicate, that valid signals will be connected to the Input or Inputs properties.

Methods

Name	Description
AllowStreaming
Append	Appends Sample to the end of the signal.
Assign
AssignTemplate	Assign values of "template-like" published properties from Source.
BufferedSamplesCount	Returns the number of samples currently stored in the buffer.
BufferLength	Defines the length of the internal buffer in samples.
BufferOverrun	Returns True, if the internal buffer has been overrun.
BufferReadPosition	Returns the current circular buffer read position.
BufferUnderrun	Returns True, if the internal buffer has been underrun.
BufferWritePosition	Returns the current circular buffer write position.
Copy	Copies signal Data and sampling frequency information.
Crest	Compute the CREST parameter.
DataInBuffer	Returns true, if there is enough data in buffer to fill Data.Length.
DetectChannelCount
EditorClass	To be overriden in descendanr classses.
get_CValues
get_Values
GetInput
GetInputs
InputsDirty	If all Inputs[i] are dirty the function returns true.
InternalPull
Invalidate	Notifies all connected components that this component has fresh data.
LoadFromStream	Load the component from Src stream.
LoadTemplateFromFile	Load a template from file.
LoadTemplateFromStream	Load a template from stream.
MarksToStrings	Convert marks to strings.
MinMax	Find minimum and maximum amplitude and store the result in the MinAmplt and MaxAmplt properties.
Monitor	Reads Dst.Length of most recent data, without advancing the read or write cursor.
ParamUpdate	The method can be assigned to some other component even handler, as a notification that a parameter has changed and that Self should consider a recalculation.
Peak	Find the maximum deviation of the signal from its mean value.
PipeReset	Recursively processes all connected components backward and calls Reset method.
Pull	Request recalculation of the entire chain of all connected components.
PullUntilEnd	Calls Pull until pipeEnd is returned.
Read	Reads data from internal Buffer to the Data property.
ReadReminder	Reads any data still in the buffer, but less than specified Length. Missing samples become zeros.
ReferenceRemoved
Reset (2)	Reset the buffer.
SaveTemplateToFile	Save template to file.
SaveTemplateToStream	Save template to stream.
SaveToStream	Save the component to Dst stream.
set_CValues
set_Values
SetComplex
SetFloatPrecision
SetInputs
SetIsDouble
Size	Assign the size of the signal from Src.
Update	Request recalculation of the data and place the result in Self.
UpdateNotify	Call this method only, if SuspendNotifyUpdate is True.
Values
ValuesToStrings	Convert values to strings.
Write (2)	Writes data to the buffer and resizes the buffer, if it is not big enough to hold everything.
WriteTo	Writes data to the buffer and resizes the buffer, if it is not big enough to hold everything. Converts precision single/double if needed.

Operators

Name	Description
operator[]

Fields

Name	Type	Description
Tag	intptr_t