Enable AscendC kernel operator

AscendC is an extended syntax for the C/C++ language that can be used to
write operators that run on Ascend NPU.

This commit introduce an operator(threshold) written in AscendC. Others
can refer to this to implement other operators.

AscendC can implement efficient fusion operators according to needs, in
this case, threshold execution speed increased by nearly 4 times.

Co-authored-by: CaoMengqing <[email protected]>

modules/cannops/CMakeLists.txt

@@ -15,3 +15,9 @@ ocv_include_directories(${CMAKE_SOURCE_DIR}/modules/ts/include)
 ocv_add_accuracy_tests(DEPENDS_ON opencv_cannops)
 ocv_add_perf_tests(DEPENDS_ON opencv_cannops)
 ocv_add_samples(opencv_cannops)
+
+# compile ascnedc kernels.
+add_subdirectory(ascendc_kernels)
+ocv_include_directories(${CMAKE_BINARY_DIR}/include/ascendc_kernels)
+ocv_target_link_libraries(opencv_cannops PRIVATE ascendc_kernels)
+ocv_target_link_libraries(opencv_test_cannops PRIVATE ascendc_kernels)

modules/cannops/ascendc_kernels/CMakeLists.txt

@@ -0,0 +1,17 @@
+set(SOC_VERSION "ascend310p3" CACHE STRING "system on chip type")
+set(ASCEND_CANN_PACKAGE_PATH "/usr/local/Ascend/ascend-toolkit/latest" CACHE PATH "ASCEND CANN package installation directory")
+set(RUN_MODE "npu" CACHE STRING "run mode: npu/sim/cpu")
+
+if(EXISTS ${ASCEND_CANN_PACKAGE_PATH}/compiler/tikcpp/ascendc_kernel_cmake)
+    set(ASCENDC_CMAKE_DIR ${ASCEND_CANN_PACKAGE_PATH}/compiler/tikcpp/ascendc_kernel_cmake)
+elseif(EXISTS ${ASCEND_CANN_PACKAGE_PATH}/ascendc_devkit/tikcpp/samples/cmake)
+    set(ASCENDC_CMAKE_DIR ${ASCEND_CANN_PACKAGE_PATH}/ascendc_devkit/tikcpp/samples/cmake)
+else()
+    message(FATAL_ERROR "ascendc_kernel_cmake does not exist, please check whether the compiler package is installed.")
+endif()
+
+include(${ASCENDC_CMAKE_DIR}/ascendc.cmake)
+
+ascendc_library(ascendc_kernels STATIC
+    threshold_opencv_kernel.cpp
+)

modules/cannops/ascendc_kernels/kernel_tiling_types.h

@@ -0,0 +1,22 @@
+#ifndef KERNEL_TILING_H
+#define KERNEL_TILING_H
+
+/*
+ * threshType:
+ *   THRESH_BINARY     = 0,
+ *   THRESH_BINARY_INV = 1,
+ *   THRESH_TRUNC      = 2,
+ *   THRESH_TOZERO     = 3,
+ *   THRESH_TOZERO_INV = 4,
+*/
+#pragma pack(push, 8)
+struct ThresholdOpencvTilingData
+{
+    float maxVal;
+    float thresh;
+    uint32_t totalLength;
+    uint8_t threshType;
+    uint8_t dtype;
+};
+#pragma pack(pop)
+#endif // KERNEL_TILING_H