DSPatch::Component Class Reference

Abstract base class for DSPatch components. More...

#include <Component.h>

Public Types
enum class	ProcessOrder { InOrder , OutOfOrder }
using	SPtr = std::shared_ptr< Component >

Public Member Functions
	NONCOPYABLE (Component)
	Component (ProcessOrder processOrder=ProcessOrder::InOrder)
bool	ConnectInput (const Component::SPtr &fromComponent, int fromOutput, int toInput)
void	DisconnectInput (int inputNo)
void	DisconnectInput (const Component::SPtr &fromComponent)
void	DisconnectAllInputs ()
int	GetInputCount () const
int	GetOutputCount () const
std::string	GetInputName (int inputNo) const
std::string	GetOutputName (int outputNo) const
void	SetBufferCount (int bufferCount, int startBuffer=0)
int	GetBufferCount () const
void	Tick (int bufferNo=0)
void	Reset (int bufferNo=0)

Protected Member Functions
virtual void	Process_ (SignalBus &, SignalBus &)=0
void	SetInputCount_ (int inputCount, const std::vector< std::string > &inputNames={})
void	SetOutputCount_ (int outputCount, const std::vector< std::string > &outputNames={})

Detailed Description

Abstract base class for DSPatch components.

Classes derived from Component can be added to a Circuit and routed to and from other Components.

On construction, derived classes must configure the component's IO buses by calling SetInputCount_() and SetOutputCount_() respectively.

Derived classes must also implement the virtual method: Process_(). The Process_() method is a callback from the DSPatch engine that occurs when a new set of input signals is ready for processing. The Process_() method has 2 arguments: the input bus, and the output bus. This method's purpose is to pull its required inputs out of the input bus, process these inputs, and populate the output bus with the results (see SignalBus).

In order for a component to do any work it must be ticked. This is performed by repeatedly calling the Tick() and Reset() methods. The Tick() method is responsible for acquiring the next set of input signals from component input wires and populating the component's input bus. To insure that these inputs are up-to-date, the dependent component first calls all of its input components' Tick() methods - hence recursively called in all components going backward through the circuit. The acquired input bus is then passed to the Process_() method. The Reset() method informs the component that the last circuit traversal has completed and hence can execute the next Tick() request.

PERFORMANCE TIP: If a component is capable of processing its buffers out-of-order within a stream processing circuit, consider initialising its base with ProcessOrder::OutOfOrder to improve performance. Note however that Process_() must be thread-safe to operate in this mode.

Definition at line 72 of file Component.h.

Member Typedef Documentation

SPtr

using DSPatch::Component::SPtr = std::shared_ptr<Component>

Definition at line 77 of file Component.h.

Member Enumeration Documentation

ProcessOrder

enum class DSPatch::Component::ProcessOrder

strong

Definition at line 79 of file Component.h.

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

• Component.h