implemented core support & sample

fixed whitespaces
fixed issues
fixed issue
fixed module statement issues
fixed access mode
added initialization check
fixed warning

modules/core/include/opencv2/core/vaapi.hpp

@@ -0,0 +1,74 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+// Copyright (C) 2015, Itseez, Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+
+#ifndef __OPENCV_CORE_VAAPI_HPP__
+#define __OPENCV_CORE_VAAPI_HPP__
+
+#ifndef __cplusplus
+#  error vaapi.hpp header must be compiled as C++
+#endif
+
+#include "opencv2/core.hpp"
+#include "ocl.hpp"
+
+#if defined(HAVE_VAAPI)
+# include "va/va.h"
+#else  // HAVE_VAAPI
+# if !defined(_VA_H_)
+    typedef void* VADisplay;
+    typedef unsigned int VASurfaceID;
+# endif // !_VA_H_
+#endif // HAVE_VAAPI
+
+namespace cv { namespace vaapi {
+
+/** @addtogroup core_vaapi
+This section describes CL-VA (VA-API) interoperability.
+
+To enable CL-VA interoperability support, configure OpenCV using CMake with WITH_VAAPI=ON . Currently VA-API is
+supported on Linux only. You should also install Intel Media Server Studio (MSS) to use this feature. You may
+have to specify the path(s) to MSS components for cmake in environment variables: VAAPI_MSDK_ROOT for Media SDK
+(default is "/opt/intel/mediasdk"), and VAAPI_IOCL_ROOT for Intel OpenCL (default is "/opt/intel/opencl").
+
+To use VA-API interoperability you should first create VADisplay (libva), and then call initializeContextFromVA()
+function to create OpenCL context and set up interoperability.
+*/
+//! @{
+
+/////////////////// CL-VA Interoperability Functions ///////////////////
+
+namespace ocl {
+using namespace cv::ocl;
+
+// TODO static functions in the Context class
+/** @brief Creates OpenCL context from VA.
+@param display - VADisplay for which CL interop should be established.
+@return Returns reference to OpenCL Context
+ */
+CV_EXPORTS Context& initializeContextFromVA(VADisplay display);
+
+} // namespace cv::vaapi::ocl
+
+/** @brief Converts InputArray to VASurfaceID object.
+@param src     - source InputArray.
+@param surface - destination VASurfaceID object.
+@param size    - size of image represented by VASurfaceID object.
+ */
+CV_EXPORTS void convertToVASurface(InputArray src, VASurfaceID surface, Size size);
+
+/** @brief Converts VASurfaceID object to OutputArray.
+@param surface - source VASurfaceID object.
+@param size    - size of image represented by VASurfaceID object.
+@param dst     - destination OutputArray.
+ */
+CV_EXPORTS void convertFromVASurface(VASurfaceID surface, Size size, OutputArray dst);
+
+//! @}
+
+}} // namespace cv::vaapi
+
+#endif /* __OPENCV_CORE_VAAPI_HPP__ */