This namespace contains experimental G-API functionality, functions or structures in this namespace are subjects to change or removal in the future releases. This namespace also contains functions which API is not stabilized yet. More...

Namespaces
namespace	draw

namespace	gst

namespace	onevpl

Classes
struct	Data
	This aggregate type represents all types which G-API can handle (via variant). More...

class	GAsyncCanceled

class	GAsyncContext
	A class to group async requests to cancel them in a single shot. More...

class	GCaptureSource
	OpenCV's VideoCapture-based streaming source. More...

class	IStreamSource
	Abstract streaming pipeline source. More...

class	QueueInput

class	QueueSource
	Queued streaming pipeline source. More...

class	QueueSourceBase

Typedefs
using	GStreamerPipeline = gst::GStreamerPipeline

using	GStreamerSource = gst::GStreamerSource

using	GVPLSource = onevpl::GSource

Functions
std::future< void >	async (GCompiled &gcmpld, GRunArgs &&ins, GRunArgsP &&outs)

std::future< void >	async (GCompiled &gcmpld, GRunArgs &&ins, GRunArgsP &&outs, GAsyncContext &ctx)

void	async (GCompiled &gcmpld, std::function< void(std::exception_ptr)> &&callback, GRunArgs &&ins, GRunArgsP &&outs)

void	async (GCompiled &gcmpld, std::function< void(std::exception_ptr)> &&callback, GRunArgs &&ins, GRunArgsP &&outs, GAsyncContext &ctx)

std::future< void >	async_apply (GComputation &gcomp, GRunArgs &&ins, GRunArgsP &&outs, GCompileArgs &&args, GAsyncContext &ctx)

std::future< void >	async_apply (GComputation &gcomp, GRunArgs &&ins, GRunArgsP &&outs, GCompileArgs &&args={})

void	async_apply (GComputation &gcomp, std::function< void(std::exception_ptr)> &&callback, GRunArgs &&ins, GRunArgsP &&outs, GCompileArgs &&args, GAsyncContext &ctx)

void	async_apply (GComputation &gcomp, std::function< void(std::exception_ptr)> &&callback, GRunArgs &&ins, GRunArgsP &&outs, GCompileArgs &&args={})

cv::Ptr< IStreamSource >	get_streaming_source (cv::Ptr< GStreamerPipeline > &pipeline, const std::string &appsinkName, const GStreamerSource::OutputType outputType=GStreamerSource::OutputType::MAT)

cv::Ptr< IStreamSource >	make_capture_src (const int id, const std::map< int, double > &properties={})

cv::Ptr< IStreamSource >	make_capture_src (const std::string &path, const std::map< int, double > &properties={})

cv::Ptr< IStreamSource >	make_gst_src (const std::string &pipeline, const GStreamerSource::OutputType outputType=GStreamerSource::OutputType::MAT)

template<class... Args>
cv::Ptr< IStreamSource >	make_onevpl_src (Args &&... args)

template<class T , class... Args>
IStreamSource::Ptr	make_src (Args &&... args)

Detailed Description

This namespace contains experimental G-API functionality, functions or structures in this namespace are subjects to change or removal in the future releases. This namespace also contains functions which API is not stabilized yet.

Typedef Documentation

◆ GStreamerPipeline

using cv::gapi::wip::GStreamerPipeline = typedef gst::GStreamerPipeline

◆ GStreamerSource

using cv::gapi::wip::GStreamerSource = typedef gst::GStreamerSource

◆ GVPLSource

using cv::gapi::wip::GVPLSource = typedef onevpl::GSource

Function Documentation

◆ async() [1/4]

std::future< void > cv::gapi::wip::async	(	GCompiled &	gcmpld,
		GRunArgs &&	ins,
		GRunArgsP &&	outs
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

gcmpld	Compiled computation (graph) to run asynchronously
ins	Input parameters for gcmpld
outs	Output parameters for gcmpld

Returns: std::future<void> object to wait for completion of async operation

See also: async

◆ async() [2/4]

std::future< void > cv::gapi::wip::async	(	GCompiled &	gcmpld,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GAsyncContext &	ctx
	)

Parameters

gcmpld	Compiled computation (graph) to run asynchronously
ins	Input parameters for gcmpld
outs	Output parameters for gcmpld
ctx	Context this request belongs to

Returns: std::future<void> object to wait for completion of async operation

See also: async GAsyncContext

◆ async() [3/4]

void cv::gapi::wip::async	(	GCompiled &	gcmpld,
		std::function< void(std::exception_ptr)> &&	callback,
		GRunArgs &&	ins,
		GRunArgsP &&	outs
	)

These functions asynchronously (i.e. probably on a separate thread of execution) call GCompiled::operator() member function of their first argument with copies of rest of arguments (except callback) passed in. The difference between the function is the way to get the completion notification (via callback or a waiting on std::future object) If exception is occurred during execution of apply it is transferred to the callback (via function parameter) or passed to future (and will be thrown on call to std::future::get)

N.B. : Input arguments are copied on call to async function (actually on call to cv::gin) and thus do not have to outlive the actual completion of asynchronous activity. While output arguments are "captured" by reference(pointer) and therefore must outlive the asynchronous activity (i.e. live at least until callback is called or future is unblocked)

Parameters

gcmpld	Compiled computation (graph) to start asynchronously
callback	Callback to be called when execution of gcmpld is done
ins	Input parameters for gcmpld
outs	Output parameters for gcmpld

◆ async() [4/4]

void cv::gapi::wip::async	(	GCompiled &	gcmpld,
		std::function< void(std::exception_ptr)> &&	callback,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GAsyncContext &	ctx
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

gcmpld	Compiled computation (graph) to run asynchronously
callback	Callback to be called when execution of gcmpld is done
ins	Input parameters for gcmpld
outs	Output parameters for gcmpld
ctx	Context this request belongs to

See also: async GAsyncContext

◆ async_apply() [1/4]

std::future< void > cv::gapi::wip::async_apply	(	GComputation &	gcomp,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GCompileArgs &&	args,
		GAsyncContext &	ctx
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

gcomp	Computation (graph) to run asynchronously
ins	Input parameters for gcomp
outs	Output parameters for gcomp
args	Compile arguments to pass to GComputation::apply()
ctx	Context this request belongs to

Returns: std::future<void> object to wait for completion of async operation

See also: async_apply async GAsyncContext

◆ async_apply() [2/4]

std::future< void > cv::gapi::wip::async_apply	(	GComputation &	gcomp,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GCompileArgs &&	args = `{}`
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

gcomp	Computation (graph) to run asynchronously
ins	Input parameters for gcomp
outs	Output parameters for gcomp
args	Compile arguments to pass to GComputation::apply()

Returns: std::future<void> object to wait for completion of async operation

See also: async_apply async

◆ async_apply() [3/4]

void cv::gapi::wip::async_apply	(	GComputation &	gcomp,
		std::function< void(std::exception_ptr)> &&	callback,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GCompileArgs &&	args,
		GAsyncContext &	ctx
	)

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters

gcomp	Computation (graph) to run asynchronously
callback	Callback to be called when execution of gcomp is done
ins	Input parameters for gcomp
outs	Output parameters for gcomp
args	Compile arguments to pass to GComputation::apply()
ctx	Context this request belongs to

See also: async_apply async GAsyncContext

◆ async_apply() [4/4]

void cv::gapi::wip::async_apply	(	GComputation &	gcomp,
		std::function< void(std::exception_ptr)> &&	callback,
		GRunArgs &&	ins,
		GRunArgsP &&	outs,
		GCompileArgs &&	args = `{}`
	)

In contrast to async() functions, these do call GComputation::apply() member function of the GComputation passed in.

Parameters

gcomp	Computation (graph) to run asynchronously
callback	Callback to be called when execution of gcomp is done
ins	Input parameters for gcomp
outs	Output parameters for gcomp
args	Compile arguments to pass to GComputation::apply()

See also: async

◆ get_streaming_source()

cv::Ptr< IStreamSource > cv::gapi::wip::get_streaming_source	(	cv::Ptr< GStreamerPipeline > &	pipeline,
		const std::string &	appsinkName,
		const GStreamerSource::OutputType	outputType = `GStreamerSource::OutputType::MAT`
	)

inline

◆ make_capture_src() [1/2]

cv::Ptr< IStreamSource > cv::gapi::wip::make_capture_src	(	const int	id,
		const std::map< int, double > &	properties = `{}`
	)

inline

◆ make_capture_src() [2/2]

cv::Ptr< IStreamSource > cv::gapi::wip::make_capture_src	(	const std::string &	path,
		const std::map< int, double > &	properties = `{}`
	)

inline

◆ make_gst_src()

cv::Ptr< IStreamSource > cv::gapi::wip::make_gst_src	(	const std::string &	pipeline,
		const GStreamerSource::OutputType	outputType = `GStreamerSource::OutputType::MAT`
	)

inline

◆ make_onevpl_src()

template<class... Args>

cv::Ptr< IStreamSource > cv::gapi::wip::make_onevpl_src ( Args &&... args )

inline

◆ make_src()

template<class T , class... Args>

IStreamSource::Ptr cv::gapi::wip::make_src ( Args &&... args )

inline

Namespaces

Classes

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ GStreamerPipeline

◆ GStreamerSource

◆ GVPLSource

Function Documentation

◆ async() [1/4]

◆ async() [2/4]

◆ async() [3/4]

◆ async() [4/4]

◆ async_apply() [1/4]

◆ async_apply() [2/4]

◆ async_apply() [3/4]

◆ async_apply() [4/4]

◆ get_streaming_source()

◆ make_capture_src() [1/2]

◆ make_capture_src() [2/2]

◆ make_gst_src()

◆ make_onevpl_src()

◆ make_src()