if(WINRT)
  ocv_module_disable(dnn)
endif()

set(the_description "Deep neural network module. It allows to load models from different frameworks and to make forward pass")

ocv_add_dispatched_file_force_all("layers/layers_common" AVX AVX2 AVX512_SKX RVV LASX)
ocv_add_dispatched_file_force_all("int8layers/layers_common" AVX2 AVX512_SKX RVV LASX)
ocv_add_dispatched_file_force_all("layers/cpu_kernels/conv_block" AVX AVX2 NEON NEON_FP16)
ocv_add_dispatched_file_force_all("layers/cpu_kernels/conv_depthwise" AVX AVX2 RVV LASX)
ocv_add_dispatched_file("layers/cpu_kernels/conv_winograd_f63" AVX AVX2 NEON NEON_FP16)
ocv_add_dispatched_file_force_all("layers/cpu_kernels/fast_gemm_kernels" AVX AVX2 NEON LASX)

ocv_add_module(dnn opencv_core opencv_imgproc WRAP python java objc js)


include(${CMAKE_CURRENT_LIST_DIR}/cmake/plugin.cmake)


ocv_option(OPENCV_DNN_OPENCL "Build with OpenCL support" HAVE_OPENCL AND NOT APPLE)

if(OPENCV_DNN_OPENCL AND HAVE_OPENCL)
  ocv_target_compile_definitions(${the_module} PRIVATE "CV_OCL4DNN=1")
endif()

if(WITH_WEBNN AND HAVE_WEBNN)
  ocv_target_compile_definitions(${the_module} PRIVATE "HAVE_WEBNN=1")
endif()

if(HAVE_TIMVX)
  ocv_target_compile_definitions(${the_module} PRIVATE "HAVE_TIMVX=1")
endif()

if(HAVE_CANN)
  ocv_target_compile_definitions(${the_module} PRIVATE "HAVE_CANN=1")
endif()

ocv_option(OPENCV_DNN_CUDA "Build with CUDA support"
    HAVE_CUDA
    AND HAVE_CUBLAS
    AND HAVE_CUDNN
)

if(OPENCV_DNN_CUDA)
  if(HAVE_CUDA AND HAVE_CUBLAS AND HAVE_CUDNN)
    ocv_target_compile_definitions(${the_module} PRIVATE "CV_CUDA4DNN=1")
  else()
    if(NOT HAVE_CUDA)
      message(SEND_ERROR "DNN: CUDA backend requires CUDA Toolkit. Please resolve dependency or disable OPENCV_DNN_CUDA=OFF")
    elseif(NOT HAVE_CUBLAS)
      message(SEND_ERROR "DNN: CUDA backend requires cuBLAS. Please resolve dependency or disable OPENCV_DNN_CUDA=OFF")
    elseif(NOT HAVE_CUDNN)
      message(SEND_ERROR "DNN: CUDA backend requires cuDNN. Please resolve dependency or disable OPENCV_DNN_CUDA=OFF")
    endif()
  endif()
endif()


ocv_cmake_hook_append(INIT_MODULE_SOURCES_opencv_dnn "${CMAKE_CURRENT_LIST_DIR}/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake")


if(MSVC)
  add_definitions( -D_CRT_SECURE_NO_WARNINGS=1 )
  ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146
                                       /wd4305 /wd4127 /wd4100 /wd4512 /wd4125 /wd4389 /wd4510 /wd4610
                                       /wd4702 /wd4456 /wd4457 /wd4065 /wd4310 /wd4661 /wd4506
  )
  if(MSVC_VERSION LESS 1920)  # MSVS 2015/2017, .pb.cc generated files
    ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4309)  # 'static_cast': truncation of constant value
  endif()
  if(MSVC_VERSION LESS 1920)  # <MSVS2019, .pb.cc generated files
    ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4189)  # local variable is initialized but not referenced
    ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4592)  # symbol will be dynamically initialized (implementation limitation)
  endif()
else()
  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-deprecated -Wmissing-prototypes -Wmissing-declarations -Wshadow
                                       -Wunused-parameter -Wsign-compare
  )
endif()
if(HAVE_CUDA)
  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef)
endif()
if(NOT HAVE_CXX11)
  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-undef)  # LANG_CXX11 from protobuf files
endif()

if(APPLE_FRAMEWORK)
  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wshorten-64-to-32)
endif()

if(ANDROID)
  add_definitions(-DDISABLE_POSIX_MEMALIGN -DTH_DISABLE_HEAP_TRACKING)
endif()

if(NOT BUILD_PROTOBUF)
  ocv_target_compile_definitions(${the_module} PRIVATE "OPENCV_DNN_EXTERNAL_PROTOBUF=1")
endif()

#suppress warnings in autogenerated caffe.pb.* files
ocv_warnings_disable(CMAKE_CXX_FLAGS
    /wd4125 /wd4267 /wd4127 /wd4244 /wd4512 /wd4702
    /wd4456 /wd4510 /wd4610 /wd4800
    /wd4701 /wd4703                    # potentially uninitialized local/pointer variable 'value' used
    /wd4505                            # unreferenced local function has been removed
    /wd4458                            # declaration of 'x' hides class member. GCC still works, MSVC bug is here: https://developercommunity.visualstudio.com/content/problem/219311/c-c4458-declaration-hides-class-member-warning-iss.html
    -wd858 -wd2196
    -Winvalid-offsetof                 # Apple Clang (attr_value.pb.cc)
)

set(include_dirs "")
set(libs "")

if(HAVE_PROTOBUF)
  ocv_target_compile_definitions(${the_module} PRIVATE "HAVE_PROTOBUF=1")

  if(PROTOBUF_UPDATE_FILES)
    file(GLOB proto_files "${CMAKE_CURRENT_LIST_DIR}/src/tensorflow/*.proto" "${CMAKE_CURRENT_LIST_DIR}/src/caffe/opencv-caffe.proto" "${CMAKE_CURRENT_LIST_DIR}/src/onnx/opencv-onnx.proto")
    set(PROTOBUF_GENERATE_CPP_APPEND_PATH ON) # required for tensorflow
    protobuf_generate_cpp(fw_srcs fw_hdrs ${proto_files})
  else()
    file(GLOB fw_srcs "${CMAKE_CURRENT_LIST_DIR}/misc/tensorflow/*.cc" "${CMAKE_CURRENT_LIST_DIR}/misc/caffe/opencv-caffe.pb.cc" "${CMAKE_CURRENT_LIST_DIR}/misc/onnx/opencv-onnx.pb.cc")
    file(GLOB fw_hdrs "${CMAKE_CURRENT_LIST_DIR}/misc/tensorflow/*.h" "${CMAKE_CURRENT_LIST_DIR}/misc/caffe/opencv-caffe.pb.h" "${CMAKE_CURRENT_LIST_DIR}/misc/onnx/opencv-onnx.pb.h")
    set(fw_inc "${CMAKE_CURRENT_LIST_DIR}/misc/caffe" "${CMAKE_CURRENT_LIST_DIR}/misc/tensorflow" "${CMAKE_CURRENT_LIST_DIR}/misc/onnx")
  endif()
endif()

ocv_option(OPENCV_DNN_TFLITE "Build with TFLite support" (TARGET ocv.3rdparty.flatbuffers))
if(TARGET ocv.3rdparty.flatbuffers AND OPENCV_DNN_TFLITE)
  if(NOT HAVE_FLATBUFFERS)
    message(FATAL_ERROR "DNN: TFLite is not supported without enabled 'flatbuffers'. Check build configuration.")
  endif()
  list(APPEND libs ocv.3rdparty.flatbuffers)
  list(APPEND fw_hdrs "${CMAKE_CURRENT_LIST_DIR}/misc/tflite/schema_generated.h")
  list(APPEND fw_inc "${CMAKE_CURRENT_LIST_DIR}/misc/tflite")

  # Schema is generated by this command:
  #add_custom_command(
  #      OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/schema_generated.h"
  #      COMMAND flatbuffers::flatc --cpp -o "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_LIST_DIR}/src/tflite/schema.fbs")
endif()

list(APPEND include_dirs ${fw_inc})
list(APPEND libs ${Protobuf_LIBRARIES})
if(NOT BUILD_PROTOBUF)
  list(APPEND include_dirs ${Protobuf_INCLUDE_DIRS})
endif()

set(sources_options "")

list(APPEND libs ${LAPACK_LIBRARIES})
if(OPENCV_DNN_OPENCL AND HAVE_OPENCL)
  list(APPEND include_dirs ${OPENCL_INCLUDE_DIRS})
else()
  set(sources_options EXCLUDE_OPENCL)
endif()

if(OPENCV_DNN_CUDA AND HAVE_CUDA AND HAVE_CUBLAS AND HAVE_CUDNN)
  list(APPEND include_dirs ${CUDA_TOOLKIT_INCLUDE} ${CUDNN_INCLUDE_DIRS})
  set(CC_LIST ${CUDA_ARCH_BIN})
  separate_arguments(CC_LIST)
  foreach(cc ${CC_LIST})
    if(cc VERSION_LESS 3.0)
      message(FATAL_ERROR "CUDA backend for DNN module requires CC 3.0 or higher. Please remove unsupported architectures from CUDA_ARCH_BIN option or disable OPENCV_DNN_CUDA=OFF.")
    endif()
  endforeach()
  unset(CC_LIST)
  if(ENABLE_CUDA_FIRST_CLASS_LANGUAGE)
    list(APPEND libs ${CUDNN_LIBRARIES} CUDA::cublas${CUDA_LIB_EXT})
    if(NOT CUDA_VERSION VERSION_LESS 10.1)
      list(APPEND libs CUDA::cublasLt${CUDA_LIB_EXT})
    endif()
  endif()
else()
  set(sources_options ${sources_options} EXCLUDE_CUDA)
endif()

if(HAVE_TIMVX)
    list(APPEND include_dirs ${TIMVX_INCLUDE_DIR})
    list(APPEND libs -Wl,--whole-archive ${TIMVX_LIBRARY} -Wl,--no-whole-archive)
endif()

if(HAVE_CANN)
  list(APPEND include_dirs ${CANN_INCLUDE_DIRS})
  list(APPEND libs -Wl,--whole-archive ${CANN_LIBRARIES} -Wl,--no-whole-archive)
endif()

set(webnn_srcs "")
if(NOT EMSCRIPTEN)
  if(HAVE_WEBNN)
    list(APPEND include_dirs ${WEBNN_HEADER_DIRS})
    list(APPEND include_dirs ${WEBNN_INCLUDE_DIRS})
    list(APPEND libs -Wl,--whole-archive ${WEBNN_LIBRARIES} -Wl,--no-whole-archive)
    list(APPEND webnn_srcs $ENV{WEBNN_NATIVE_DIR}/gen/src/webnn/webnn_cpp.cpp)
  endif()
endif()

ocv_module_include_directories(${include_dirs})
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
  ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-suggest-override")  # GCC
  ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-array-bounds")  # GCC 9.3.0 (Ubuntu 20.04)
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
  ocv_append_source_files_cxx_compiler_options(fw_srcs "-Wno-inconsistent-missing-override")  # Clang
endif()

set(dnn_runtime_libs "")

file(GLOB_RECURSE dnn_srcs
     "${CMAKE_CURRENT_LIST_DIR}/src/*.cpp"
)
file(GLOB_RECURSE dnn_int_hdrs
     "${CMAKE_CURRENT_LIST_DIR}/src/*.hpp"
     "${CMAKE_CURRENT_LIST_DIR}/src/*.h"
)
set(dnn_plugin_srcs ${dnn_srcs} ${dnn_int_hdrs})
ocv_list_filterout_ex(dnn_plugin_srcs
    "/src/dnn.cpp$|/src/dnn_utils.cpp$|/src/dnn_read.cpp$|/src/registry.cpp$|/src/backend.cpp$"
    # importers
    "/src/(caffe|darknet|onnx|tensorflow|torch)/"
    # executors
    "/src/(cuda|cuda4dnn|ocl4dnn|vkcom|webnn)/"
)

ocv_option(OPENCV_DNN_OPENVINO "Build with OpenVINO support (2021.4+)" (TARGET ocv.3rdparty.openvino))
if(TARGET ocv.3rdparty.openvino AND OPENCV_DNN_OPENVINO)
  if(NOT HAVE_OPENVINO AND NOT HAVE_NGRAPH)
    message(FATAL_ERROR "DNN: Inference Engine is not supported without enabled 'nGraph'. Check build configuration.")
  endif()
  if("openvino" IN_LIST DNN_PLUGIN_LIST OR DNN_PLUGIN_LIST STREQUAL "all")
    # plugin doesn't support PCH, separate directory scope is necessary
    # opencv_world requires absolute path
    add_subdirectory("${CMAKE_CURRENT_LIST_DIR}/misc/plugin/openvino" "${CMAKE_CURRENT_BINARY_DIR}/dnn_plugin_openvino")
  elseif(NOT OPENCV_DNN_BUILTIN_BACKEND)
    list(APPEND dnn_runtime_libs ocv.3rdparty.openvino)
  endif()
endif()

set(OPENCV_DNN_BACKEND_DEFAULT "" CACHE STRING "Default backend used by the DNN module (DNN_BACKEND_OPENCV if empty)")
if(OPENCV_DNN_BACKEND_DEFAULT)
  ocv_append_source_file_compile_definitions("${CMAKE_CURRENT_LIST_DIR}/src/dnn_params.cpp" "OPENCV_DNN_BACKEND_DEFAULT=${OPENCV_DNN_BACKEND_DEFAULT}")
endif()

ocv_install_used_external_targets(${libs} ${dnn_runtime_libs})

ocv_glob_module_sources(${sources_options} SOURCES ${fw_srcs} ${webnn_srcs})
ocv_create_module(${libs} ${dnn_runtime_libs})
ocv_add_samples()
ocv_add_accuracy_tests(${dnn_runtime_libs})

if(NOT BUILD_PROTOBUF)
  if(TARGET opencv_test_dnn)
    ocv_target_compile_definitions(opencv_test_dnn PRIVATE "OPENCV_DNN_EXTERNAL_PROTOBUF=1")
  endif()
endif()

set(perf_path "${CMAKE_CURRENT_LIST_DIR}/perf")
file(GLOB_RECURSE perf_srcs "${perf_path}/*.cpp")
file(GLOB_RECURSE perf_hdrs "${perf_path}/*.hpp" "${perf_path}/*.h")
ocv_add_perf_tests(${dnn_runtime_libs}
    FILES test_common "${CMAKE_CURRENT_LIST_DIR}/test/test_common.hpp" "${CMAKE_CURRENT_LIST_DIR}/test/test_common.impl.hpp"
    FILES Src ${perf_srcs}
    FILES Include ${perf_hdrs}
)

ocv_option(OPENCV_DNN_PERF_CAFFE "Add performance tests of Caffe framework" OFF)
ocv_option(OPENCV_DNN_PERF_CLCAFFE "Add performance tests of clCaffe framework" OFF)
if(BUILD_PERF_TESTS)
  if (OPENCV_DNN_PERF_CAFFE
      OR ${the_module}_PERF_CAFFE  # compatibility for deprecated option
  )
    find_package(Caffe QUIET)
    if (Caffe_FOUND)
      ocv_target_compile_definitions(opencv_perf_dnn PRIVATE "HAVE_CAFFE=1")
      ocv_target_link_libraries(opencv_perf_dnn caffe)
    endif()
  elseif(OPENCV_DNN_PERF_CLCAFFE
         OR ${the_module}_PERF_CAFFE  # compatibility for deprecated option
  )
    find_package(Caffe QUIET)
    if (Caffe_FOUND)
      ocv_target_compile_definitions(opencv_perf_dnn PRIVATE "HAVE_CLCAFFE=1")
      ocv_target_link_libraries(opencv_perf_dnn caffe)
    endif()
  endif()
endif()

if(DNN_ENABLE_PLUGINS)
  ocv_target_compile_definitions(${the_module} PRIVATE ENABLE_PLUGINS)
  if(TARGET opencv_test_dnn)
    ocv_target_compile_definitions(opencv_test_dnn PRIVATE ENABLE_PLUGINS)
  endif()
  if(OPENCV_DEBUG_POSTFIX)
    ocv_append_source_file_compile_definitions("${CMAKE_CURRENT_LIST_DIR}/src/backend.cpp" "DEBUG_POSTFIX=${OPENCV_DEBUG_POSTFIX}")
  endif()
endif()

ocv_option(OPENCV_TEST_DNN_OPENVINO "Build test with OpenVINO code" (TARGET ocv.3rdparty.openvino))
if(TARGET ocv.3rdparty.openvino AND OPENCV_TEST_DNN_OPENVINO)
  if(TARGET opencv_test_dnn)
    ocv_target_link_libraries(opencv_test_dnn ocv.3rdparty.openvino)
  endif()
endif()

ocv_option(OPENCV_TEST_DNN_CANN "Build test with CANN" (TARGET ocv.3rdparty.cann))
if(TARGET ocv.3rdparty.cann AND OPENCV_TEST_DNN_CANN)
  if(TARGET opencv_test_dnn)
    ocv_target_link_libraries(opencv_test_dnn ocv.3rdparty.cann)
  endif()
endif()

ocv_option(OPENCV_TEST_DNN_TIMVX "Build test with TIM-VX" (HAVE_TIMVX))
if(OPENCV_TEST_DNN_TIMVX)
  if(TARGET opencv_test_dnn)
    ocv_target_compile_definitions(opencv_test_dnn PRIVATE "HAVE_TIMVX=1")
  endif()
endif()

ocv_option(OPENCV_TEST_DNN_TFLITE "Build test with TFLite" (OPENCV_DNN_TFLITE))
if(OPENCV_TEST_DNN_TFLITE)
  if(TARGET opencv_test_dnn)
    ocv_target_compile_definitions(opencv_test_dnn PRIVATE "OPENCV_TEST_DNN_TFLITE=1")
  endif()
  if(TARGET opencv_perf_dnn)
    ocv_target_compile_definitions(opencv_perf_dnn PRIVATE "OPENCV_TEST_DNN_TFLITE=1")
  endif()
endif()