Merge pull request #25307 from MaximMilashchenko:halrvv071

* added hal for cv_hal_cvtBGRtoBGR rvv 0.7.1

CMakeLists.txt

@@ -265,6 +265,8 @@ 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_NDSRVP "Use Andes RVP extension" (NOT CV_DISABLE_OPTIMIZATION)
   VISIBLE_IF RISCV)
+OCV_OPTION(WITH_HAL_RVV "Use HAL RVV optimizations" (NOT CV_DISABLE_OPTIMIZATION)
+  VISIBLE_IF RISCV)
 OCV_OPTION(WITH_CPUFEATURES "Use cpufeatures Android library" ON
   VISIBLE_IF ANDROID
   VERIFY HAVE_CPUFEATURES)
@@ -994,6 +996,13 @@ if(WITH_NDSRVP)
   endif()
 endif()
 
+if(WITH_HAL_RVV)
+  ocv_debug_message(STATUS "Enable HAL RVV acceleration")
+  if(NOT ";${OpenCV_HAL};" MATCHES ";halrvv;")
+    set(OpenCV_HAL "halrvv;${OpenCV_HAL}")
+  endif()
+endif()
+
 foreach(hal ${OpenCV_HAL})
   if(hal STREQUAL "carotene")
     if(";${CPU_BASELINE_FINAL};" MATCHES ";NEON;")
@@ -1023,6 +1032,10 @@ foreach(hal ${OpenCV_HAL})
     else()
       message(STATUS "NDSRVP: Andes GNU Toolchain DSP extension is not open, disabling ndsrvp...")
     endif()
+  elseif(hal STREQUAL "halrvv")
+      add_subdirectory(3rdparty/hal_rvv/)
+      ocv_hal_register(RVV_HAL_LIBRARIES RVV_HAL_HEADERS RVV_HAL_INCLUDE_DIRS)
+      list(APPEND OpenCV_USED_HAL "HAL RVV (ver ${RVV_HAL_VERSION})")
   elseif(hal STREQUAL "openvx")
     add_subdirectory(3rdparty/openvx)
     ocv_hal_register(OPENVX_HAL_LIBRARIES OPENVX_HAL_HEADERS OPENVX_HAL_INCLUDE_DIRS)