// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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// Copyright (C) 2015, Itseez, Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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#ifndef OPENCV_CORE_VA_INTEL_HPP
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#define OPENCV_CORE_VA_INTEL_HPP
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#ifndef __cplusplus
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# error va_intel.hpp header must be compiled as C++
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#endif
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#include "opencv2/core.hpp"
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#include "ocl.hpp"
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#if defined(HAVE_VA)
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# include "va/va.h"
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#else // HAVE_VA
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# if !defined(_VA_H_)
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typedef void* VADisplay;
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typedef unsigned int VASurfaceID;
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# endif // !_VA_H_
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#endif // HAVE_VA
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namespace cv { namespace va_intel {
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/** @addtogroup core_va_intel
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This section describes Intel VA-API/OpenCL (CL-VA) interoperability.
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To enable CL-VA interoperability support, configure OpenCV using CMake with WITH_VA_INTEL=ON . Currently VA-API is
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supported on Linux only. You should also install Intel Media Server Studio (MSS) to use this feature. You may
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have to specify the path(s) to MSS components for cmake in environment variables:
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- VA_INTEL_IOCL_ROOT for Intel OpenCL (default is "/opt/intel/opencl").
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To use CL-VA interoperability you should first create VADisplay (libva), and then call initializeContextFromVA()
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function to create OpenCL context and set up interoperability.
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*/
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//! @{
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/////////////////// CL-VA Interoperability Functions ///////////////////
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namespace ocl {
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using namespace cv::ocl;
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// TODO static functions in the Context class
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/** @brief Creates OpenCL context from VA.
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@param display - VADisplay for which CL interop should be established.
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@param tryInterop - try to set up for interoperability, if true; set up for use slow copy if false.
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@return Returns reference to OpenCL Context
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*/
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CV_EXPORTS Context& initializeContextFromVA(VADisplay display, bool tryInterop = true);
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} // namespace cv::va_intel::ocl
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/** @brief Converts InputArray to VASurfaceID object.
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@param display - VADisplay object.
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@param src - source InputArray.
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@param surface - destination VASurfaceID object.
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@param size - size of image represented by VASurfaceID object.
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*/
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CV_EXPORTS void convertToVASurface(VADisplay display, InputArray src, VASurfaceID surface, Size size);
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/** @brief Converts VASurfaceID object to OutputArray.
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@param display - VADisplay object.
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@param surface - source VASurfaceID object.
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@param size - size of image represented by VASurfaceID object.
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@param dst - destination OutputArray.
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*/
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CV_EXPORTS void convertFromVASurface(VADisplay display, VASurfaceID surface, Size size, OutputArray dst);
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//! @}
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}} // namespace cv::va_intel
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#endif /* OPENCV_CORE_VA_INTEL_HPP */
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