Merge pull request #25443 from asmorkalov:as/kleidicv_hal

Integrate ARM KleidiCV as OpenCV HAL #25443

The library source code with license: https://gitlab.arm.com/kleidi/kleidicv/

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

3rdparty/kleidicv/CMakeLists.txt

@@ -0,0 +1,23 @@
+project(kleidicv_hal)
+
+set(KLEIDICV_SOURCE_PATH "" CACHE PATH "Directory containing KleidiCV sources")
+ocv_update(KLEIDICV_SRC_COMMIT "a9971ba8bf1d8b008a32c6ed8fea05cd8eb16748")
+ocv_update(KLEIDICV_SRC_HASH "53d1d80620395a12c7fee91460499368")
+
+if(KLEIDICV_SOURCE_PATH)
+  set(THE_ROOT "${KLEIDICV_SOURCE_PATH}")
+else()
+  ocv_download(FILENAME "kleidicv-${KLEIDICV_SRC_COMMIT}.tar.gz"
+                HASH ${KLEIDICV_SRC_HASH}
+                URL
+                  "${OPENCV_KLEIDICV_URL}"
+                  "$ENV{OPENCV_KLEIDICV_URL}"
+                  "https://gitlab.arm.com/kleidi/kleidicv/-/archive/${KLEIDICV_SRC_COMMIT}/"
+                DESTINATION_DIR "${OpenCV_BINARY_DIR}/3rdparty/kleidicv/"
+                ID KLEIDICV
+                STATUS res
+                UNPACK RELATIVE_URL)
+  set(THE_ROOT "${OpenCV_BINARY_DIR}/3rdparty/kleidicv/kleidicv-${KLEIDICV_SRC_COMMIT}")
+endif()
+
+include("${THE_ROOT}/adapters/opencv/CMakeLists.txt")

CMakeLists.txt

@@ -13,7 +13,6 @@ FATAL: In-source builds are not allowed.
 ")
 endif()
 
-
 include(cmake/OpenCVMinDepVersions.cmake)
 
 if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore)
@@ -258,6 +257,8 @@ OCV_OPTION(WITH_CAP_IOS "Enable iOS video capture" ON
   VERIFY HAVE_CAP_IOS)
 OCV_OPTION(WITH_CAROTENE "Use NVidia carotene acceleration library for ARM platform" (NOT CV_DISABLE_OPTIMIZATION)
   VISIBLE_IF (ARM OR AARCH64) AND NOT IOS AND NOT XROS)
+OCV_OPTION(WITH_KLEIDICV "Use KleidiCV library for ARM platforms" OFF
+  VISIBLE_IF (AARCH64 AND (ANDROID OR UNIX AND NOT IOS AND NOT XROS)))
 OCV_OPTION(WITH_CPUFEATURES "Use cpufeatures Android library" ON
   VISIBLE_IF ANDROID
   VERIFY HAVE_CPUFEATURES)
@@ -966,6 +967,13 @@ if(HAVE_OPENVX)
   endif()
 endif()
 
+if(WITH_KLEIDICV)
+  ocv_debug_message(STATUS "Enable KleidiCV acceleration")
+  if(NOT ";${OpenCV_HAL};" MATCHES ";kleidicv;")
+    set(OpenCV_HAL "kleidicv;${OpenCV_HAL}")
+  endif()
+endif()
+
 if(WITH_CAROTENE)
   ocv_debug_message(STATUS "Enable carotene acceleration")
   if(NOT ";${OpenCV_HAL};" MATCHES ";carotene;")
@@ -990,6 +998,10 @@ foreach(hal ${OpenCV_HAL})
     else()
       message(STATUS "Carotene: NEON is not available, disabling carotene...")
     endif()
+  elseif(hal STREQUAL "kleidicv")
+    add_subdirectory(3rdparty/kleidicv)
+    ocv_hal_register(KLEIDICV_HAL_LIBRARIES KLEIDICV_HAL_HEADERS KLEIDICV_HAL_INCLUDE_DIRS)
+    list(APPEND OpenCV_USED_HAL "KleidiCV (ver ${KLEIDICV_HAL_VERSION})")
   elseif(hal STREQUAL "openvx")
     add_subdirectory(3rdparty/openvx)
     ocv_hal_register(OPENVX_HAL_LIBRARIES OPENVX_HAL_HEADERS OPENVX_HAL_INCLUDE_DIRS)

doc/tutorials/introduction/config_reference/config_reference.markdown

@@ -623,6 +623,7 @@ Following build options are utilized in `opencv_contrib` modules, as stated [pre
 `CMAKE_TOOLCHAIN_FILE`
 
 `WITH_CAROTENE`
+`WITH_KLEIDICV`
 `WITH_CPUFEATURES`
 `WITH_EIGEN`
 `WITH_OPENVX`