- adopted build scripts
- OpenJPEG build warnings are suppressed

changed OpenCV license from BSD to Apache 2 license

* as discussed and announced earlier, changed OpenCV license from BSD to Apache 2. Many files still contain old-style copyrights though

* changed wording a bit; preserve the original OpenCV BSD license

- Added cross compile cmake file for target riscv64-clang
- Extended cmake for RISC-V and added instruction checks
- Created intrin_rvv.hpp with C++ version universal intrinsics

  * keep it possible to build for old CC
  * make sure old generations don't come up for the choice
  * remove related version check of old one

original commit: 2813aa7e

     * treat both CMAKE_C_COMPILER and c_compiler_realpath as candidate

- preventive fix for arch "11.0" (CUDA_ARCH_BIN_OR_PTX_10 bug)
- new var: OPENCV_CUDA_DETECTION_NVCC_FLAGS
- new var: OPENCV_CMAKE_CUDA_DEBUG

* core(cuda): fix build

- MSVS 19.25.28612.0
- CUDA release 11.0, V11.0.167

* cmake(cuda): backport workaround for CUDA 11

* cmake(cuda): call CUDA_BUILD_CLEAN_TARGET() on finalize

* cmake(cuda): use CMAKE_SUPPRESS_REGENERATION with MSVS

Fix cuda11

* use cudnn_version.h to detect version when it is available

* remove nppi from CUDA11

* use ocv_list_filterout

* dnn(cuda): temporary disable CUDNN 8.0

  * use only supported CC in the list
  * workaround of #17526

  * Ampere has CC 8.0
  * Arm64 server support has been added in CUDA 11 (only V100 for now)

This typo just made me lose my mind on the conan package update. please merge.

  * detect header automatically and not based on version number

Objc binding

* Initial work on Objective-C wrapper

* Objective-C generator script; update manually generated wrappers

* Add Mat tests

* Core Tests

* Imgproc wrapper generation and tests

* Fixes for Imgcodecs wrapper

* Miscellaneous fixes. Swift build support

* Objective-C wrapper build/install

* Add Swift wrappers for videoio/objdetect/feature2d

* Framework build;iOS support

* Fix toArray functions;Use enum types whenever possible

* Use enum types where possible;prepare test build

* Update test

* Add test runner scripts for iOS and macOS

* Add test scripts and samples

* Build fixes

* Fix build (cmake 3.17.x compatibility)

* Fix warnings

* Fix enum name conflicting handling

* Add support for document generation with Jazzy

* Swift/Native fast accessor functions

* Add Objective-C wrapper for calib3d, dnn, ml, photo and video modules

* Remove IntOut/FloatOut/DoubleOut classes

* Fix iOS d...

* Added VTK 9 support

  * cache the result
  * DRY
  * brush up based on review

The legacy `includedir` was removed in 4.0 (https://github.com/opencv/opencv/pull/12477) but it was not removed from the `.pc` file.

This causes issues when trying to link against OpenCV using pkg-config in CMake.

* Do not copy standalone IPP libraries to install for static builds

* Restored IPP installation under option

original commit: 45263d76

* Update OpenCVFindVA_INTEL.cmake

When set env VA_INTEL_IOCL_ROOT, "if($ENV{VA_INTEL_IOCL_ROOT})" don't work.
    My modification as follow.
    
    -    if($ENV{VA_INTEL_IOCL_ROOT})
    +    if(DEFINED ENV{VA_INTEL_IOCL_ROOT})
    
    Refer: https://cmake.org/cmake/help/latest/variable/ENV.html

* based on merge comment, update code

Details: https://gitlab.kitware.com/cmake/community/-/wikis/FAQ#can-i-do-make-uninstall-with-cmake

Jpeg2000 OpenJPEG port

* OpenJPEG based JPEG2000 decoder implementation

Currently, the following input color spaces and depth conversions are
supported:

- 8 bit -> 8 bit
- 16 bit -> 16 bit (IMREAD_UNCHANGED, IMREAD_ANYDEPTH)

- RGB(a) -> BGR
- RGBA -> BGRA (IMREAD_UNCHANGED)
- Y(a) -> Y(a) (IMREAD_ANYCOLOR, IMREAD_GRAY, IMREAD_UNCHANGED))
- YCC -> Y (IMREAD_GRAY)

* Check for OpenJPEG availability

This enables OpenJPEG based JPEG2000 imread support by default, which
can be disabled by -DWITH_OPENJPEG=OFF. In case OpenJPEG is enabled
and found, any checks for Jasper are skipped.

* Implement precision downscaling for precision > 8 without IMREAD_UNCHANGED

With IMREAD_UNCHANGED, values are kept from the input image, without it
components are downscaled to CV_8U range.

* Enable Jpeg2K tests when OpenJPEG is available

* Add support for some more color conversions

Support IMREAD_GRAY when input color space is RGB or unspecified.
Support YUV input color space for BGR output.

* fix: problems with unmanaged memory

* fix: CMake warning - HAVE_OPENJPEG is undefined

Removed trailing whitespaces

* fix: CMake find_package OpenJPEG add minimal version

* Basic JPEG2K encoder

Images with depth CV_8U and CV_16U are supported, with 1 to 4 channels.

* feature: Improved code for OpenJPEG2000 encoder/decoder

 - Removed code duplication
 - Added error handlers
 - Extracted functions

* feature: Update conversion openjpeg array from/to Mat

* feature: Extend ChannelsIterator to fulfill RandomAccessIterator named requirements

 - Removed channels split in copyFromMatImpl. With ChannelsIterator no allocations are performed.
 - Split whole loop into 2 parts in copyToMat -> where std::copy and std::transforms are called.

* fix: Applied review comments.

 - Changed `nullptr` in CV_LOG* functions to `NULL`
 - Added `falls through` comment in decoder color space `switch`
 - Added warning about unsupported parameters for the encoder

* feature: Added decode from in-memory buffers.
Co-authored-by: Vadim Levin <vadim.levin@xperience.ai>