Merge pull request #19755 from mikhail-nikolskiy:ffmpeg-umat

cv::UMat output/input in VideoCapture/VideoWriter (data stays in GPU memory)

* FFMPEG with UMat input/output

* OpenCL_D3D* context

* fix Linux build

* cosmetic changes

* fix build if USE_AV_HW_CODECS=0

* simplify how child context pointer stored in parent context

* QSV interop with OpenCL on Windows

* detect_msdk.cmake via pkg-config

* fix av_buffer_ref() usage

* revert windows-decode-mfx whitelisting; remove debug msg

* address review comments

* rename property to HW_ACCELERATION_USE_OPENCL

* fix issue with "cl_khr_d3d11_sharing" extension not reported by OpenCL GPU+CPU platform

* core(ocl): add OpenCL stubs for configurations without OpenCL

* videoio(ffmpeg): update #if guards

* Put OpenCL related code under HAVE_OPENCL; simplify reuse of media context from OpenCL context

* videoio(test): skip unsupported tests

- plugins don't support OpenCL/UMat yet
- change handling of *_USE_OPENCL flag

* videoio(ffmpeg): OpenCL dependency

* videoio(ffmpeg): MediaSDK/oneVPL dependency

* cleanup, logging

* cmake: fix handling of 3rdparty interface targets

Co-authored-by: Alexander Alekhin <alexander.a.alekhin@gmail.com>

modules/core/include/opencv2/core/ocl.hpp

@@ -43,6 +43,8 @@
 #define OPENCV_OPENCL_HPP
 
 #include "opencv2/core.hpp"
+#include <typeinfo>
+#include <typeindex>
 
 namespace cv { namespace ocl {
 
@@ -277,6 +279,12 @@ public:
     /** @returns cl_context value */
     void* ptr() const;
 
+    /**
+     * @brief Get OpenCL context property specified on context creation
+     * @param propertyId Property id (CL_CONTEXT_* as defined in cl_context_properties type)
+     * @returns Property value if property was specified on clCreateContext, or NULL if context created without the property
+     */
+    void* getOpenCLContextProperty(int propertyId) const;
 
     bool useSVM() const;
     void setUseSVM(bool enabled);
@@ -290,6 +298,21 @@ public:
 
     void release();
 
+    class CV_EXPORTS UserContext {
+    public:
+        virtual ~UserContext();
+    };
+    template <typename T>
+    inline void setUserContext(const std::shared_ptr<T>& userContext) {
+        setUserContext(typeid(T), userContext);
+    }
+    template <typename T>
+    inline std::shared_ptr<T> getUserContext() {
+        return std::dynamic_pointer_cast<T>(getUserContext(typeid(T)));
+    }
+    void setUserContext(std::type_index typeId, const std::shared_ptr<UserContext>& userContext);
+    std::shared_ptr<UserContext> getUserContext(std::type_index typeId);
+
     struct Impl;
     inline Impl* getImpl() const { return (Impl*)p; }
     inline bool empty() const { return !p; }