Intel VA-API/OpenCL (CL-VA) interoperability

Detailed Description

This section describes Intel VA-API/OpenCL (CL-VA) interoperability.

To enable basic VA interoperability build OpenCV with libva library integration enabled: -DWITH_VA=ON (corresponding dev package should be installed).

To enable advanced CL-VA interoperability support on Intel HW, enable option: -DWITH_VA_INTEL=ON (OpenCL integration should be enabled which is the default setting). Special runtime environment should be set up in order to use this feature: correct combination of libva, OpenCL runtime and media driver should be installed.

Check usage example for details: samples/va_intel/va_intel_interop.cpp

Namespaces
namespace	cv::va_intel::ocl

Functions
void	cv::va_intel::convertFromVASurface (VADisplay display, VASurfaceID surface, Size size, OutputArray dst)
	Converts VASurfaceID object to OutputArray.
void	cv::va_intel::convertToVASurface (VADisplay display, InputArray src, VASurfaceID surface, Size size)
	Converts InputArray to VASurfaceID object.

Function Documentation

convertFromVASurface()

void cv::va_intel::convertFromVASurface	(	VADisplay	display,
		VASurfaceID	surface,
		Size	size,
		OutputArray	dst
	)

#include <opencv2/core/va_intel.hpp>

Converts VASurfaceID object to OutputArray.

Parameters

display	- VADisplay object.
surface	- source VASurfaceID object.
size	- size of image represented by VASurfaceID object.
dst	- destination OutputArray.

convertToVASurface()

void cv::va_intel::convertToVASurface	(	VADisplay	display,
		InputArray	src,
		VASurfaceID	surface,
		Size	size
	)

#include <opencv2/core/va_intel.hpp>

Converts InputArray to VASurfaceID object.

Parameters

display	- VADisplay object.
src	- source InputArray.
surface	- destination VASurfaceID object.
size	- size of image represented by VASurfaceID object.