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# Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
# SPDX-License-Identifier: MIT
set(OPENCV_VERSION 4.0.0)
set(FFMPEG_VERSION 4.2.1)
set(LIBX264_VERSION stable)
set(OPENCV_LIB OpenCV${OPENCV_VERSION})
set(FFMPEG_LIB ffmpeg${FFMPEG_VERSION})
set(X264_LIB x264${LIBX264_VERSION})
set(OPENCV_NAMES
libopencv_core.so.${OPENCV_VERSION}
libopencv_imgproc.so.${OPENCV_VERSION}
libopencv_imgcodecs.so.${OPENCV_VERSION}
libopencv_videoio.so.${OPENCV_VERSION}
libopencv_video.so.${OPENCV_VERSION}
libopencv_highgui.so.${OPENCV_VERSION})
set(OPENCV_LIBS)
set(FFMPEG_LIBS)
foreach(opencv_lib ${OPENCV_NAMES})
find_library(OPENCV_${opencv_lib}
NAMES
${opencv_lib}
HINTS
${OPENCV_LIB_DIR}
PATHS
${OPENCV_LIB_DIR}
PATH_SUFFIXES
"lib"
"lib64")
if(OPENCV_${opencv_lib})
message("Found library ${OPENCV_${opencv_lib}}")
list(APPEND OPENCV_LIBS ${OPENCV_${opencv_lib}})
get_filename_component(OPENCV_LIB_DIR ${OPENCV_${opencv_lib}} DIRECTORY)
get_filename_component(OPENCV_ROOT_DIR ${OPENCV_LIB_DIR} DIRECTORY)
set(OPENCV_INCLUDE_DIR ${OPENCV_ROOT_DIR}/include/opencv4)
endif()
endforeach()
if(OPENCV_LIBS)
message("OpenCV libraries found")
set(OPENCV_LIBS_FOUND TRUE)
else()
set(OPENCV_ROOT_DIR ${DEPENDENCIES_DIR}/opencv)
set(OPENCV_DEPENDENCIES_ARGS)
set(OPENCV_EXTRA_LINKER_ARGS)
set(OPENCV_PKGCONFIG)
if(CMAKE_CROSSCOMPILING)
set(FFMPEG_ROOT_DIR ${DEPENDENCIES_DIR}/ffmpeg)
set(LIBX264_ROOT_DIR ${DEPENDENCIES_DIR}/x264)
if (CMAKE_BUILD_TYPE STREQUAL Debug)
set(CONFIGURE_DEBUG --enable-debug)
set(OPENCV_DEBUG "-DBUILD_WITH_DEBUG_INFO=ON")
endif()
ExternalProject_Add(${X264_LIB}
URL "https://code.videolan.org/videolan/x264/-/archive/${LIBX264_VERSION}/x264-${LIBX264_VERSION}.tar.gz"
DOWNLOAD_DIR ${LIBX264_ROOT_DIR}
PREFIX ${LIBX264_ROOT_DIR}
CONFIGURE_COMMAND <SOURCE_DIR>/configure
--host=${GNU_MACHINE}
--enable-static
--enable-shared
--cross-prefix=${CROSS_PREFIX}
--prefix=${CMAKE_BINARY_DIR}
--extra-ldflags=-static-libstdc++
--extra-cflags=-fPIC
${CONFIGURE_DEBUG}
INSTALL_DIR ${CMAKE_BINARY_DIR}
BUILD_COMMAND $(MAKE)
INSTALL_COMMAND $(MAKE) install
)
set(FFMPEG_Config
--enable-shared
--enable-cross-compile
--cross-prefix=${CROSS_PREFIX}
--arch=${CMAKE_SYSTEM_PROCESSOR}
--target-os=linux
--prefix=${CMAKE_BINARY_DIR}
--enable-gpl
--enable-nonfree
--enable-libx264
--extra-cflags=-I${CMAKE_BINARY_DIR}/include
--extra-cflags=-fPIC
--extra-ldflags=-L${CMAKE_BINARY_DIR}/lib
--extra-libs=-ldl
--extra-libs=-static-libstdc++
)
ExternalProject_Add(${FFMPEG_LIB}
URL "https://github.com/FFmpeg/FFmpeg/archive/n${FFMPEG_VERSION}.tar.gz"
URL_HASH MD5=05792c611d1e3ebdf2c7003ff4467390
DOWNLOAD_DIR ${FFMPEG_ROOT_DIR}
PREFIX ${FFMPEG_ROOT_DIR}
CONFIGURE_COMMAND <SOURCE_DIR>/configure ${FFMPEG_Config} ${CONFIGURE_DEBUG}
INSTALL_DIR ${CMAKE_BINARY_DIR}
BUILD_COMMAND $(MAKE) VERBOSE=1
INSTALL_COMMAND $(MAKE) install
)
set(OPENCV_DEPENDENCIES_ARGS "-static-libstdc++ -Wl,-rpath,${CMAKE_BINARY_DIR}/lib")
set(OPENCV_EXTRA_LINKER_ARGS "-DOPENCV_EXTRA_EXE_LINKER_FLAGS=${OPENCV_DEPENDENCIES_ARGS}")
set(OPENCV_PKGCONFIG "PKG_CONFIG_LIBDIR=${CMAKE_BINARY_DIR}/lib/pkgconfig")
set(FFMPEG_NAMES
libavcodec.so
libavformat.so
libavutil.so
libswscale.so
)
foreach(ffmpeg_lib ${FFMPEG_NAMES})
add_library(FFMPEG_${ffmpeg_lib} SHARED IMPORTED)
set_target_properties(FFMPEG_${ffmpeg_lib} PROPERTIES IMPORTED_LOCATION ${CMAKE_BINARY_DIR}/lib/${ffmpeg_lib})
list(APPEND OPENCV_LIBS FFMPEG_${ffmpeg_lib})
endforeach()
add_library(X264_lib264.so SHARED IMPORTED)
set_target_properties(X264_lib264.so PROPERTIES IMPORTED_LOCATION ${CMAKE_BINARY_DIR}/lib/libx264.so)
list(APPEND OPENCV_LIBS X264_lib264.so)
endif()
set(OPENCV_CMAKE_ARGS
-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-DCMAKE_C_FLAGS=-fPIC
-DCMAKE_CXX_FLAGS=-fPIC
-DWITH_GTK=OFF
-DWITH_JPEG=ON
-DWITH_IPP=OFF
-DBUILD_opencv_java_bindings_generator=OFF
-DBUILD_opencv_ml=OFF
-DBUILD_opencv_objdetect=OFF
-DBUILD_opencv_photo=OFF
-DBUILD_opencv_python_bindings_generator=OFF
-DBUILD_opencv_stitching=OFF
-DBUILD_opencv_gapi=OFF
-DBUILD_opencv_features2d=OFF
-DBUILD_opencv_dnn=OFF
-DBUILD_opencv_flann=OFF
-DBUILD_opencv_calib3d=OFF
-DBUILD_opencv_python2=OFF
-DBUILD_opencv_python3=OFF
-DBUILD_opencv_java=OFF
-DBUILD_opencv_js=OFF
-DBUILD_opencv_ts=OFF
-DBUILD_JPEG=ON
-DBUILD_JPEG_TURBO_DISABLE=ON
-DBUILD_PNG=ON
-DBUILD_TIFF=ON
-DZLIB_FOUND=OFF
-DBUILD_ZLIB=ON
-DBUILD_PERF_TESTS=OFF
-DBUILD_TESTS=OFF
-DBUILD_DOCS=OFF
-DBUILD_opencv_apps=OFF
-DBUILD_EXAMPLES=OFF
-DWITH_V4L=ON
-DWITH_LIBV4L=OFF
-DWITH_FFMPEG=ON
-DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}
-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
-DCMAKE_INSTALL_RPATH=\$ORIGIN:\$ORIGIN/lib:\$ORIGIN/../lib
-DCMAKE_SHARED_LINKER_FLAGS=-static-libstdc++
${OPENCV_DEBUG}
)
ExternalProject_Add(${OPENCV_LIB}
URL "https://codeload.github.com/opencv/opencv/tar.gz/${OPENCV_VERSION}"
URL_HASH MD5=f051c1ff7b327b60123d71b53801b316
DOWNLOAD_DIR ${OPENCV_ROOT_DIR}
PREFIX ${OPENCV_ROOT_DIR}
CONFIGURE_COMMAND ${OPENCV_PKGCONFIG}
${CMAKE_COMMAND} ${OPENCV_CMAKE_ARGS} ${OPENCV_EXTRA_ARGS}
${OPENCV_EXTRA_LINKER_ARGS} ${OPENCV_ROOT_DIR}/src/${OPENCV_LIB}
INSTALL_DIR ${CMAKE_BINARY_DIR}
BUILD_COMMAND $(MAKE)
INSTALL_COMMAND $(MAKE) install
)
if(CMAKE_CROSSCOMPILING)
ExternalProject_Add_StepDependencies(${FFMPEG_LIB} build ${X264_LIB})
ExternalProject_Add_StepDependencies(${OPENCV_LIB} build ${FFMPEG_LIB})
endif()
set(OPENCV_INCLUDE_DIR ${CMAKE_BINARY_DIR}/include/opencv4)
set(OPENCV_LIB_DIR ${CMAKE_BINARY_DIR}/lib)
foreach(opencv_lib ${OPENCV_NAMES})
add_library(OPENCV_${opencv_lib} SHARED IMPORTED)
set_target_properties(OPENCV_${opencv_lib} PROPERTIES IMPORTED_LOCATION ${OPENCV_LIB_DIR}/${opencv_lib})
list(APPEND OPENCV_LIBS OPENCV_${opencv_lib})
endforeach()
endif()
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