#include <sample_streaming_source.h>

Inherits adtf::ucom::catwo::object< streaming::ant::INamedGraphObject, streaming::ant::IDataBinding, streaming::ant::IInterfaceBinding, streaming::ant::IRuntimeBehaviour, streaming::ant::IDynamicDataBinding, streaming::ant::IDynamicInterfaceBinding, streaming::ant::IStreamingService, streaming::ant::IStreamingSource, streaming::ant::ISampleStreamingSource, base::ant::IConfiguration >, adtf::filter::cGraphObject, and adtf::streaming::ant::streaming_level_machine.

Public Types
template<typename T>
using	iobject_ptr = adtf::ucom::ant::iobject_ptr<T>

Public Types inherited from adtf::filter::cGraphObject
enum class	tRecoverableAction : uint8_t { Log = 0 , Fatal = 1 }

Public Member Functions
tResult	Init () override

tResult	StartStreaming () override

tResult	StopStreaming () override

tResult	SetName (const char *strName) override

tResult	GetName (base::ant::IString &&strName) const override

tResult	SetParent (const ucom::ant::IObject *poParentObject) override

tResult	GetParent (const ucom::ant::IObject *&poParentObject) const override

tResult	GetPins (ucom::ant::iobject_list< streaming::ant::IPin > &oPins) const override

tResult	FindPin (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pPin) const override

tResult	GetBindingObjects (ucom::ant::iobject_list< streaming::ant::IBindingObject > &lstBindingObject) override

tResult	GetBindingObjects (ucom::ant::iobject_list< const streaming::ant::IBindingObject > &lstBindingObject) const override

tResult	FindBindingObject (const char *strName, ucom::ant::iobject_ptr< const ucom::ant::IObject > &pIBindingObject) const override

tResult	FindBindingObject (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pIBindingObject) override

tResult	GetRunners (ucom::ant::iobject_list< streaming::ant::IRunner > &lstRunners) const override

tResult	FindRunner (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pRunner) const override

tResult	GetInnerPipes (ucom::ant::iobject_list< streaming::ant::ITriggerPipe > &lstInnerTriggerPipes) const override

tResult	RequestPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType, ucom::ant::iobject_ptr< streaming::ant::IInPin > &pInPin) override

tResult	RequestPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType, ucom::ant::iobject_ptr< streaming::ant::IOutPin > &pOutPin) override

tResult	RequestBindingObject (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType, ucom::ant::iobject_ptr< streaming::ant::IBindingClient > &pBindingClient) override

tResult	RequestBindingObject (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType, ucom::ant::iobject_ptr< streaming::ant::IBindingServer > &pBindingServer) override

tResult	SetState (tStreamingState eFilterState) override

tStreamingState	GetState () override

tResult	GetProperties (ucom::ant::iobject_ptr< const base::ant::IProperties > &pProperties) const override

tResult	GetProperties (ucom::ant::iobject_ptr< base::ant::IProperties > &pProperties) override

tResult	AttachConfiguration (const char *strName, base::ant::IConfiguration &oAttachedConfiguration) override

tResult	DetachConfiguration (const char *strName) override

Public Member Functions inherited from adtf::ucom::catwo::object< streaming::ant::INamedGraphObject, streaming::ant::IDataBinding, streaming::ant::IInterfaceBinding, streaming::ant::IRuntimeBehaviour, streaming::ant::IDynamicDataBinding, streaming::ant::IDynamicInterfaceBinding, streaming::ant::IStreamingService, streaming::ant::IStreamingSource, streaming::ant::ISampleStreamingSource, base::ant::IConfiguration >
tResult	GetInterface (const char i_strIID, void &o_pInterface) override
	Query interfaces on an object.

tResult	GetInterface (const char i_strIID, const void &o_pInterface) const override
	Provides const correct interface querying.

void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.

tResult	GetInterface (const char i_strIID, void &o_pInterface) override
	Query interfaces on an object.

tResult	GetInterface (const char i_strIID, const void &o_pInterface) const override
	Provides const correct interface querying.

void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.

tResult	GetInterface (const char i_strIID, void &o_pInterface) override
	Query interfaces on an object.

tResult	GetInterface (const char i_strIID, const void &o_pInterface) const override
	Provides const correct interface querying.

void	Destroy () const override
	Switch from non-virtual destructor to virtual destructor.

Public Member Functions inherited from adtf::ucom::ant::IObject
	ADTF_IID (IObject, "object.ant.ucom.adtf.iid")

Public Member Functions inherited from adtf::filter::cGraphObject
	cGraphObject ()
	Default Constructor.

	~cGraphObject () override
	Destructor.

virtual tResult	Process (base::flash::tNanoSeconds tmTrigger, streaming::ant::IRunner *pRunner)

virtual tResult	ProcessInput (base::flash::tNanoSeconds tmTrigger, streaming::flash::ISampleReader *pReader)

virtual tResult	ProcessInput (streaming::flash::ISampleReader *pReader, const ucom::ant::iobject_ptr< const streaming::ant::ISample > &pSample)

virtual tResult	ProcessInput (streaming::flash::ISampleReader pReader, base::flash::tNanoSeconds tmSample, const void pSampleData, size_t nSampleDataSize)

template<typename ReaderType = cPinReader>
ReaderType *	CreateInputPin (const char *strName, bool bDataInTrigger=true, bool bForwardTriggerViaOutputPins=true)

template<typename ReaderType = cPinReader>
ReaderType *	CreateInputPin (const char *strName, const cStreamTypeHelper &oType, bool bDataInTrigger=true, bool bForwardTriggerViaOutputPins=true)

template<typename ReaderType = cPinReader, typename CALLABLE = std::function<tResult(base::flash::tNanoSeconds)>, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds >, bool > = true>
ReaderType *	CreateInputPinWithCallback (const char *strName, const cStreamTypeHelper &oType, CALLABLE &&fnTriggerCallback, bool bForwardTriggerViaOutputPins=true)

template<typename ReaderType = cPinReader, typename CALLABLE = std::function<tResult(const ucom::ant::iobject_ptr<const streaming::ant::ISample>&)>, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, const ucom::ant::iobject_ptr< const streaming::ant::ISample > & >, bool > = true>
ReaderType *	CreateInputPinWithCallback (const char *strName, const cStreamTypeHelper &oType, CALLABLE &&fnSampleCallback, bool bForwardTriggerViaOutputPins=true)

template<typename ReaderType = cPinReader, typename CALLABLE = std::function<tResult(base::flash::tNanoSeconds, const void, size_t)>, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds, const void , size_t >, bool > = true>
ReaderType *	CreateInputPinWithCallback (const char *strName, const cStreamTypeHelper &oType, CALLABLE &&fnSampleDataCallback, bool bForwardTriggerViaOutputPins=true)

template<typename Type, typename ReaderType = cPinReader, typename CALLABLE = std::function<tResult(base::flash::tNanoSeconds, const Type&)>, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds, const Type & >, bool > = true>
ReaderType *	CreateInputPinWithCallback (const char *strName, const cStreamTypeHelper &oType, CALLABLE &&fnDataCallback, bool bForwardTriggerViaOutputPins=true)

virtual tResult	AcceptType (streaming::flash::ISampleReader *pReader, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType)

template<typename WriterType = cPinWriter>
WriterType *	CreateOutputPin (const char *strName)

template<typename WriterType = cPinWriter>
WriterType *	CreateOutputPin (const char *strName, const cStreamTypeHelper &oType)

template<typename RequestableWriterType = streaming::requestable_writer<>>
RequestableWriterType *	CreateRequestableOutputPin (const char *strName, const cStreamTypeHelper &oType=streaming::ant::stream_meta_type_anonymous())

streaming::ant::IRunner *	CreateRunner (const char *strName, const cTriggerHint &oTriggerHint=cNoTriggerHint(), bool bForwardTriggerViaOutputPins=true)

template<typename CALLABLE, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds >, bool > = true>
streaming::ant::IRunner *	CreateRunner (const char *strName, CALLABLE &&fnRunFunction, const cTriggerHint &oTriggerHint=cNoTriggerHint(), bool bForwardTriggerViaOutputPins=true)

template<typename Interface, typename Instance>
void	CreateInterfaceServer (const char strName, ucom::ant::enable_object_ptr_from_this< Instance > pInstance)

template<typename Interface>
void	CreateInterfaceServer (const char *strName, const ucom::ant::iobject_ptr< Interface > &pInstance)

template<typename Interface>
interface_client< Interface >	CreateInterfaceClient (const char *strName)

template<typename ReaderType = cPinReader>
std::shared_ptr< ReaderType >	CreateReader (const char *strName, const cStreamTypeHelper &oType)

template<typename WriterType = cPinWriter>
std::shared_ptr< WriterType >	CreateWriter (const char *strName, const cStreamTypeHelper &oType)

template<typename CALLABLE, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds >, bool > = true>
ucom::ant::object_ptr< streaming::ant::IRunner >	RegisterRunner (const char *strName, CALLABLE &&fnRunFunction)

tResult	RegisterRunner (const ucom::ant::iobject_ptr< streaming::ant::IRunner > &pRunner) override

tResult	RegisterRunner (const char *strName, base::flash::IRunnable &oRunnable)

tResult	RegisterRunner (const char *strName, adtf::base::ant::IRunnable &oRunnable) override

tResult	ConfigureDataInTrigger (const char strRunnerName, const char strPinName)

tResult	ConfigureDataOutTrigger (const char strRunnerName, const char strPinName)

tResult	ConfigureTimerTrigger (const char *strRunnerName, tTimeStamp tmPeriod)

tResult	ConfigureThreadTrigger (const char *strRunnerName, bool bCallCyclic)

virtual tResult	RequestDynamicInputPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType)

virtual tResult	RequestDynamicOutputPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType)

virtual tResult	RequestDynamicInterfaceClient (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType)

virtual tResult	RequestDynamicInterfaceServer (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType)

virtual tResult	EnableSubStream (streaming::flash::ISampleWriter pWriter, uint32_t nSubStreamId, const base::ant::IProperties pRequestProperties=nullptr)

virtual void	DisableSubStream (streaming::flash::ISampleWriter *pWriter, uint32_t nSubStreamId)

tResult	RequestPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType, ucom::ant::iobject_ptr< streaming::ant::IInPin > &pInPin)
	For internal use. This will call RequestDynamicInputPin().

tResult	RequestPin (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType, ucom::ant::iobject_ptr< streaming::ant::IOutPin > &pOutPin)
	For internal use. This will call RequestDynamicOutputPin().

tResult	RequestBindingObject (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType, ucom::ant::iobject_ptr< streaming::ant::IBindingClient > &pClient)
	For internal use. This will call RequestDynamicInterfaceClient().

tResult	RequestBindingObject (const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IBindingType > &pType, ucom::ant::iobject_ptr< streaming::ant::IBindingServer > &pServer)
	For internal use. This will call RequestDynamicInterfaceServer().

void	RegisterPropertyVariable (const char *strName, base::ant::cPropertyVariable &oPropertyVariable)

void	SetDescription (const char *strDescription)

void	SetDescription (const char strItem, const char strDescription)

void	SetEditor (const char strName, const char strUrl)

void	SetHelpLink (const char *strUrl)

tResult	ActivatePins () override

util::log::ILogChannel *	CreateLogChannel (std::string_view strName, base::elasto::IErrorHandling::tAction eDefaultErrorAction=base::elasto::IErrorHandling::tAction::Stop, tRecoverableAction eDefaultRecoverableAction=tRecoverableAction::Log, util::log::tLogLevel eDefaultLogLevel=util::log::tLogLevel::Detail)

util::log::ILogChannel *	GetLogChannel (std::string_view strName={})

util::log::ILogChannel *	a_util_get_current_log_channel () const noexcept

tResult	SetName (const char *strName)

tResult	SetParent (const ucom::ant::IObject *oParentObject)

ucom::object_ptr< services::ant::IMacroResolver >	GetParentMacroResolver () const

Public Member Functions inherited from adtf::streaming::flash::cNamedGraphObject
tResult	GetName (base::ant::IString &&strName) const

tResult	SetName (const char *strName)

tResult	SetParent (const ucom::ant::IObject *pParentObject)

tResult	GetParent (const ucom::ant::IObject *&poParentObject) const

Public Member Functions inherited from adtf::streaming::ant::cDataBinding
tResult	GetPins (ucom::ant::iobject_list< IPin > &lstPins) const
	private d-pointer

tResult	FindPin (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pPin) const

virtual tResult	RegisterPin (const ucom::ant::iobject_ptr< IPin > &pIPin)

tResult	RegisterPin (const ucom::ant::iobject_ptr< IInPin > &pIInPin)

tResult	RegisterPin (const ucom::ant::iobject_ptr< IOutPin > &pIOutPin)

virtual tResult	UnregisterPin (const ucom::ant::iobject_ptr< IPin > &pIPin)

tResult	ReleasePins ()

virtual tResult	DeactivatePins ()

tResult	Disconnect ()

Public Member Functions inherited from adtf::streaming::ant::cInterfaceBinding
	cInterfaceBinding ()
	D Pointer Implementation for private members.

virtual	~cInterfaceBinding ()

tResult	GetBindingObjects (ucom::ant::iobject_list< IBindingObject > &lstBindingObject)

tResult	GetBindingObjects (ucom::ant::iobject_list< const IBindingObject > &lstBindingObject) const

tResult	FindBindingObject (const char *strName, ucom::ant::iobject_ptr< const ucom::ant::IObject > &pIBindingObject) const

tResult	FindBindingObject (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pIBindingObject)

virtual tResult	RegisterBindingObject (const ucom::ant::iobject_ptr< IBindingObject > &pBindingObject)

tResult	RegisterBindingObject (const ucom::ant::iobject_ptr< IBindingServer > &pBindingServer)

tResult	RegisterBindingObject (const ucom::ant::iobject_ptr< IBindingClient > &pBindingClient)

tResult	UnregisterBindingObject (const ucom::ant::iobject_ptr< const IBindingObject > &pBindingObject)

tResult	Unbind ()

tResult	ReleaseBindingObjects ()

Public Member Functions inherited from adtf::streaming::ant::cRuntimeBehaviour
tResult	GetRunners (ucom::ant::iobject_list< IRunner > &lstRunners) const
	copydoc IRuntimeBehaviour::GetRunners

tResult	FindRunner (const char *strName, ucom::ant::iobject_ptr< ucom::ant::IObject > &pRunner) const
	copydoc IRuntimeBehaviour::FindRunner

tResult	GetInnerPipes (ucom::ant::iobject_list< ITriggerPipe > &lstInnerpTriggerPipe) const
	copydoc IRuntimeBehaviour::GetInnerPipes

virtual tResult	UnregisterRunner (const ucom::ant::iobject_ptr< IRunner > &pRunner)

tResult	ReleaseRunners ()

virtual tResult	RegisterInnerPipe (const ucom::ant::iobject_ptr< ITriggerPipe > &pTriggerPipe)

virtual tResult	UnregisterInnerPipe (const ucom::ant::iobject_ptr< ITriggerPipe > &pTriggerPipe)

tResult	ReleaseTriggerPipes ()

Public Member Functions inherited from adtf::base::flash::cConfiguration
	cConfiguration ()
	Default constructor.

virtual	~cConfiguration ()
	Destructor.

tResult	GetProperties (adtf::ucom::ant::iobject_ptr< const IProperties > &pProperties) const

tResult	GetProperties (adtf::ucom::ant::iobject_ptr< IProperties > &pProperties)

tResult	AttachConfiguration (const char *strName, IConfiguration &oAttachedConfiguration)

tResult	DetachConfiguration (const char *strName)

tResult	RegisterPropertyVariable (const char *strName, ant::cPropertyVariable &oPropertyVariable)

Additional Inherited Members
Protected Types inherited from adtf::ucom::ant::level_machine< Subclass, LevelType, START_LEVEL >
enum	tDirection : uint8_t { Inc = 0 , Dec = 1 }
	Direction of entering a new Level. More...

typedef tResult(Subclass::*	tChangeMethod) ()
	Defintion of function type called within the `handler` implementation.

Protected Member Functions inherited from adtf::ucom::ant::IObject
	~IObject ()=default
	Protected destructor --> Only the final implementation can be destroyed!

Protected Member Functions inherited from adtf::filter::cGraphObject
void	SetupStreamer (std::shared_ptr< streaming::flash::ISampleStreamer > pStreamer, const char *strName, const ucom::ant::iobject_ptr< const streaming::ant::IStreamType > &pType)

void	CreateInputPin (std::shared_ptr< streaming::flash::ISampleReader > pReader, bool bDataInTrigger=true, bool bForwardTriggerViaOutputPins=true)

template<typename CALLABLE, std::enable_if_t< std::is_invocable_r_v< tResult, std::decay_t< CALLABLE >, base::flash::tNanoSeconds >, bool > = true>
void	CreateInputPin (std::shared_ptr< streaming::flash::ISampleReader > pReader, CALLABLE &&fnTriggerCallback, bool bForwardTriggerViaOutputPins)

void	CreateInputPin (std::shared_ptr< streaming::flash::ISampleReader > pReader, const char *strTriggerFunctionName, bool bForwardTriggerViaOutputPins=true)

void	CreateOutputPin (std::shared_ptr< streaming::flash::ISampleWriter > pWriter)

void	ConfigureRunner (streaming::ant::IRunner *pRunner, const cTriggerHint &oTriggerHint, bool bForwardTriggerViaOutputPins)

std::string	GetFullName ()

Protected Member Functions inherited from adtf::streaming::ant::cDataBinding
	cDataBinding ()
	CTOR.

virtual	~cDataBinding ()
	DTOR.

Protected Member Functions inherited from adtf::streaming::ant::cRuntimeBehaviour
	cRuntimeBehaviour ()
	private _d-pointer

virtual	~cRuntimeBehaviour ()
	DTOR.

Protected Member Functions inherited from adtf::streaming::ant::streaming_level_machine
	streaming_level_machine (const streaming_level_machine &)=delete

	streaming_level_machine (streaming_level_machine &&)=delete

streaming_level_machine &	operator= (const streaming_level_machine &)=delete

streaming_level_machine &	operator= (streaming_level_machine &&)=delete

tResult	SetLevel (IStreamingService::tStreamingState eStreamingState)

virtual tResult	Construct ()

virtual tResult	Destruct ()

virtual tResult	Shutdown ()

Protected Member Functions inherited from adtf::ucom::ant::level_machine< Subclass, LevelType, START_LEVEL >
virtual	~level_machine ()=default
	DTOR.

LevelType	GetLevel () const

template<typename ... InnerHandlers>
tResult	ChangeLevel (LevelType eLevel)

Protected Attributes inherited from adtf::filter::cGraphObject
ucom::ant::object_ptr< services::ant::IReferenceClock >	_clock

std::unique_ptr< cImplementation >	m_pImplementation

Protected Attributes inherited from adtf::streaming::flash::cNamedGraphObject
const adtf::ucom::ant::IObject *	m_pParent = nullptr
	parent of the named object

std::string	m_strName
	name of the

Detailed Description

Base class for ADTF sample streaming sources

Use this as a base for implementing an ADTF sample streaming source (that lives and works in the ADTF Streaming Graph). For all available functionality please see adtf::filter::cGraphObject which is a direct base of this class.

Please have a look at the following examples on how to implement sample streaming sources:

Most of the time you

create pins in your constructor
perform other long running or property based initialization in Init()
reset your internal data and start threads and timers in StartStreaming().

Base class for adtf::filter::cFilter, adtf::filter::cSampleStreamingSource and adtf::filter::cSampleStreamingSink.

Basic Data, Interface and Runtime Behaviour

The class provides many convenience member functions that facilitate the following operations:

creation of input Pins: CreateInputPin() and CreateInputPinWithCallback()
creation of output Pins: CreateOutputPin()
creation of interface server objects: CreateInterfaceServer()
creation of interface client objects: CreateInterfaceClient()
creation of Runners: CreateRunner().

Dynamic Objects

For the implementation of dynamic pins, interface clients and interface servers overwrite one or more of the following virtual functions:

Error Handling

All Create* methods throw exceptions in case of errors. The ADTF SDK is prepared to cope with exceptions within any of the graph objects methods, especially in your subclasses' constructors. You are also free to throw exceptions (THROW_ERROR_DESC) in methods that return tResult error codes. But if you call methods that return a tResult error code yourself, make sure to wrap them with the appropriate RETURN_IF_FAILED or THROW_IF_FAILED macros.

Member Function Documentation

◆ Init()

tResult adtf::filter::cSampleStreamingSource::Init ( )

overridevirtual

Initializes the source.

Perform your (long running) initialization based on properties here.

Example Usage

#include <adtffiltersdk/adtf_filtersdk.h>
 
class cMySource: public adtf::filter::cSampleStreamingSource
{
    public:
        ADTF_CLASS_ID_NAME(cMySource, "my_source.streaming_source.adtf.cid", "My Source");
 
        cMySource()
        {
            RegisterPropertyVariable("my_config_file", m_strConfigFileName);
        }
 
        tResult Init() override
        {
            RETURN_IF_FAILED(cSampleStreamingSource::Init());
 
            adtf::util::cString strConfigFileContents;
            RETURN_IF_FAILED(adtf::util::cFileSystem::ReadTextFile(m_strConfigFileName, strConfigFileContents));
            LOG_INFO("My config file contents: %s", strConfigFileContents.GetPtr());
 
            RETURN_NOERROR;
        }
 
    private:
        adtf::base::property_variable<adtf::util::cFilename> m_strConfigFileName;
};

Init transition while changing from tStreamingState::State_Constructed to tStreamState::State_Initialized.

Use this transition callback to initialize your service when it depends on the connections. Before Init is called, all pins are requested, connected and their properties are set.

Note: Make sure to call the parent implementation of the used base class at the beginning within your overriding function!

Returns: Returns a standard result code which depends on the implementation.

Return values

ERR_NOERROR	Successfully constructed
any	Error The Streaming Graph will stop initializing.

Reimplemented from adtf::streaming::ant::streaming_level_machine.

◆ StartStreaming()

tResult adtf::filter::cSampleStreamingSource::StartStreaming ( )

overridevirtual

Start your threads and timers in this method.

Example Usage

#include <adtffiltersdk/adtf_filtersdk.h>
#include <adtfsystemsdk/adtf_systemsdk.h>
 
class cMySource: public adtf::filter::cSampleStreamingSource
{
    public:
        ADTF_CLASS_ID_NAME(cMySource, "my_source.streaming_source.adtf.cid", "My Source");
 
        cMySource()
        {
            m_pWriter = CreateOutputPin("output", adtf::streaming::stream_type_plain<uint32_t>());
        }
 
        tResult Init() override
        {
            RETURN_IF_FAILED(cSampleStreamingSource::Init());
            RETURN_IF_FAILED(_runtime->GetObject(m_pClock));
            RETURN_NOERROR;
        }
 
        tResult StartStreaming() override
        {
            RETURN_IF_FAILED(cSampleStreamingSource::StartStreaming());
            m_nCounter = 0;
 
            auto strMyName = adtf::streaming::get_named_graph_object_full_name(*this);
            m_oTimer = adtf::system::kernel_timer(strMyName + ".generation_timer",
                                                  1000000,
                                                  1000000,
                                                  [&]
            {
               adtf::streaming::output_sample_data<uint32_t> oOutputData(m_pClock->GetStreamTimeNs());
               oOutputData = ++m_nCounter;
               m_pWriter->Write(oOutputData.Release());
            });
 
            RETURN_NOERROR;
        }
 
        tResult StopStreaming() override
        {
            m_oTimer.Stop();
            return cSampleStreamingSource::StopStreaming();
        }
 
    private:
        adtf::system::kernel_timer m_oTimer;
        adtf::streaming::ISampleWriter* m_pWriter = nullptr;
        adtf::ucom::object_ptr<adtf::services::IReferenceClock> m_pClock;
        uint32_t m_nCounter = 0;
};

StatrStreaming transition while changing from tStreamState::State_Initialized to tStreamingState::State_Streaming.

Use this transition callback to initalize and start threads and timers.

Note: Make sure to call the parent implementation of the used base class at the beginning within your overriding function!

Returns: Returns a standard result code which depends on the implementation.

Reimplemented from adtf::streaming::ant::streaming_level_machine.

◆ StopStreaming()

tResult adtf::filter::cSampleStreamingSource::StopStreaming ( )

overridevirtual

Stop your threads and timers in this method.

Example Usage

#include <adtffiltersdk/adtf_filtersdk.h>
#include <adtfsystemsdk/adtf_systemsdk.h>
 
class cMySource: public adtf::filter::cSampleStreamingSource
{
    public:
        ADTF_CLASS_ID_NAME(cMySource, "my_source.streaming_source.adtf.cid", "My Source");
 
        cMySource()
        {
            m_pWriter = CreateOutputPin("output", adtf::streaming::stream_type_plain<uint32_t>());
        }
 
        tResult Init() override
        {
            RETURN_IF_FAILED(cSampleStreamingSource::Init());
            RETURN_IF_FAILED(_runtime->GetObject(m_pClock));
            RETURN_NOERROR;
        }
 
        tResult StartStreaming() override
        {
            RETURN_IF_FAILED(cSampleStreamingSource::StartStreaming());
            m_nCounter = 0;
 
            auto strMyName = adtf::streaming::get_named_graph_object_full_name(*this);
            m_oTimer = adtf::system::kernel_timer(strMyName + ".generation_timer",
                                                  1000000,
                                                  1000000,
                                                  [&]
            {
               adtf::streaming::output_sample_data<uint32_t> oOutputData(m_pClock->GetStreamTimeNs());
               oOutputData = ++m_nCounter;
               m_pWriter->Write(oOutputData.Release());
            });
 
            RETURN_NOERROR;
        }
 
        tResult StopStreaming() override
        {
            m_oTimer.Stop();
            return cSampleStreamingSource::StopStreaming();
        }
 
    private:
        adtf::system::kernel_timer m_oTimer;
        adtf::streaming::ISampleWriter* m_pWriter = nullptr;
        adtf::ucom::object_ptr<adtf::services::IReferenceClock> m_pClock;
        uint32_t m_nCounter = 0;
};

StopStreaming transition while changing from tStreamingState::State_Streaming to tStreamState::State_Initialized.

Use this transition callback to stop and destroy threads and timers.

Keep in mind, that streaming and triggers might still occur during and after this function is called. Streaming will only have stopped completely before any other following state change. If your streaming service has any blocking operations during the handling of triggers, make sure that you cancel them in this function.

Note: Make sure to call the parent implementation of the used base class at the end within your overriding function!

Returns: Returns a standard result code which depends on the implementation.

Return values

ERR_NOERROR	Successfully constructed
any	Error The Streaming Graph will stop starting.

Reimplemented from adtf::streaming::ant::streaming_level_machine.

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

src/libraries/filtersdk/include/adtffiltersdk/sample_streaming_source.h

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Basic Data, Interface and Runtime Behaviour

Dynamic Objects

Error Handling

Member Function Documentation

◆ Init()

Example Usage

◆ StartStreaming()

Example Usage

◆ StopStreaming()

Example Usage