if(WINRT)
  ocv_module_disable(dnn)
endif()

if(NOT HAVE_PROTOBUF)
  ocv_module_disable(opencv_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)

ocv_add_module(dnn opencv_core opencv_imgproc WRAP python java objc js)

ocv_option(OPENCV_DNN_OPENCL "Build with OpenCL support" HAVE_OPENCL AND NOT APPLE)
if(HAVE_TENGINE)
  add_definitions(-DHAVE_TENGINE=1)
endif()

if(OPENCV_DNN_OPENCL AND HAVE_OPENCL)
  add_definitions(-DCV_OCL4DNN=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)
    add_definitions(-DCV_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
  )
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)
  add_definitions(-DOPENCV_DNN_EXTERNAL_PROTOBUF=1)
endif()

add_definitions(-DHAVE_PROTOBUF=1)

#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(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()

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)
else()
  set(sources_options ${sources_options} EXCLUDE_CUDA)
endif()

if(HAVE_TENGINE)
	list(APPEND include_dirs ${TENGINE_INCLUDE_DIRS})
	list(APPEND libs -Wl,--whole-archive ${TENGINE_LIBRARIES} -Wl,--no-whole-archive)
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 "")
if(INF_ENGINE_TARGET)
  set(use_nn_builder OFF)
  if(TARGET inference_engine_nn_builder OR # custom imported target
     TARGET IE::inference_engine_nn_builder OR # default imported target via InferenceEngineConfig.cmake
     INF_ENGINE_RELEASE VERSION_LESS "2020000000") # compatibility with older versions on IE
    set(use_nn_builder ON)
  endif()
  ocv_option(OPENCV_DNN_IE_NN_BUILDER_2019 "Build with Inference Engine NN Builder API support" ${use_nn_builder})  # future: NOT HAVE_NGRAPH
  if(OPENCV_DNN_IE_NN_BUILDER_2019)
    message(STATUS "DNN: Enabling Inference Engine NN Builder API support")
    add_definitions(-DHAVE_DNN_IE_NN_BUILDER_2019=1)
  endif()
  list(APPEND dnn_runtime_libs ${INF_ENGINE_TARGET})
endif()
if(HAVE_NGRAPH)
  message(STATUS "DNN: Enabling Inference Engine nGraph API support")
  add_definitions(-DHAVE_DNN_NGRAPH)
  list(APPEND dnn_runtime_libs ngraph::ngraph)
endif()

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

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(${INF_ENGINE_TARGET}
    FILES test_common "${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)
      add_definitions(-DHAVE_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)
      add_definitions(-DHAVE_CLCAFFE=1)
      ocv_target_link_libraries(opencv_perf_dnn caffe)
    endif()
  endif()
endif()