vcpkg_from_github(
    OUT_SOURCE_PATH SOURCE_PATH
    REPO ffmpeg/ffmpeg
    REF "n${VERSION}"
    SHA512 3b273769ef1a1b63aed0691eef317a760f8c83b1d0e1c232b67bbee26db60b4864aafbc88df0e86d6bebf07185bbd057f33e2d5258fde6d97763b9994cd48b6f
    HEAD_REF master
    PATCHES
    0001-create-lib-libraries.patch
    0002-fix-msvc-link.patch
    0003-fix-windowsinclude.patch
    0004-dependencies.patch
    0005-fix-nasm.patch
    0007-fix-lib-naming.patch
    0013-define-WINVER.patch
    0020-fix-aarch64-libswscale.patch
    0024-fix-osx-host-c11.patch
    0040-ffmpeg-add-av_stream_get_first_dts-for-chromium.patch # Do not remove this patch. It is required by chromium
    0041-add-const-for-opengl-definition.patch
    0043-fix-miss-head.patch
    patch/0001-avcodec-amfenc-add-query_timeout-option-for-h264-hev.patch
    patch/0002-libavcodec-amfenc-reconfig-when-bitrate-change.patch
    patch/0004-videotoolbox-changing-bitrate.patch
    patch/0005-mediacodec-changing-bitrate.patch
    patch/0006-dlopen-libva.patch
    patch/0007-fix-linux-configure.patch
    patch/0008-remove-amf-loop-query.patch
    patch/0009-fix-nvenc-reconfigure-blur.patch
    patch/0010.disable-loading-DLLs-from-app-dir.patch
    patch/0011-android-mediacodec-encode-align-64.patch
    patch/0012-fix-macos-big-sur-CVBufferCopyAttachments.patch
)

if(SOURCE_PATH MATCHES " ")
    message(FATAL_ERROR "Error: ffmpeg will not build with spaces in the path. Please use a directory with no spaces")
endif()

if(NOT VCPKG_TARGET_ARCHITECTURE STREQUAL "wasm32")
    vcpkg_find_acquire_program(NASM)
    get_filename_component(NASM_EXE_PATH "${NASM}" DIRECTORY)
    vcpkg_add_to_path("${NASM_EXE_PATH}")
endif()

set(OPTIONS "\
--disable-shared \
--enable-static \
--enable-pic \
--disable-everything \
--disable-programs \
--disable-doc \
--disable-htmlpages \
--disable-manpages \
--disable-podpages \
--disable-txtpages \
--disable-network \
--disable-appkit \
--disable-coreimage \
--disable-metal \
--disable-sdl2 \
--disable-securetransport \
--disable-vulkan \
--disable-audiotoolbox \
--disable-v4l2-m2m \
--disable-debug \
--disable-valgrind-backtrace \
--disable-large-tests \
--disable-bzlib \
--disable-avdevice \
--enable-avcodec \
--enable-avformat \
--disable-avfilter \
--disable-swresample \
--disable-swscale \
--disable-postproc \
--enable-decoder=h264 \
--enable-decoder=hevc \
--enable-parser=h264 \
--enable-parser=hevc \
--enable-bsf=h264_mp4toannexb \
--enable-bsf=hevc_mp4toannexb  \
--enable-bsf=h264_metadata \
--enable-bsf=hevc_metadata \
--enable-muxer=mp4 \
--enable-protocol=file \
")

if(VCPKG_HOST_IS_WINDOWS)
    vcpkg_acquire_msys(MSYS_ROOT PACKAGES automake1.16)
    set(SHELL "${MSYS_ROOT}/usr/bin/bash.exe")
    vcpkg_add_to_path("${MSYS_ROOT}/usr/share/automake-1.16")
    string(APPEND OPTIONS " --pkg-config=${CURRENT_HOST_INSTALLED_DIR}/tools/pkgconf/pkgconf${VCPKG_HOST_EXECUTABLE_SUFFIX}")
else()
    find_program(SHELL bash)
endif()

if(VCPKG_TARGET_IS_LINUX)
    string(APPEND OPTIONS "\
--target-os=linux \
--enable-pthreads \
--disable-vdpau \
")

    if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
    else()
        string(APPEND OPTIONS "\
--enable-cuda \
--enable-ffnvcodec \
--enable-encoder=h264_nvenc \
--enable-encoder=hevc_nvenc \
--enable-hwaccel=h264_nvdec \
--enable-hwaccel=hevc_nvdec \
--enable-amf  \
--enable-encoder=h264_amf \
--enable-encoder=hevc_amf \
--enable-hwaccel=h264_vaapi \
--enable-hwaccel=hevc_vaapi \
--enable-encoder=h264_vaapi \
--enable-encoder=hevc_vaapi \
")

        if(VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
            string(APPEND OPTIONS "\
    --enable-cuda_llvm \
")
        endif()
    endif()
elseif(VCPKG_TARGET_IS_WINDOWS)
    string(APPEND OPTIONS "\
--target-os=win32 \
--toolchain=msvc \
--cc=cl \
--enable-gpl \
--enable-d3d11va \
--enable-hwaccel=h264_d3d11va \
--enable-hwaccel=hevc_d3d11va \
--enable-hwaccel=h264_d3d11va2 \
--enable-hwaccel=hevc_d3d11va2 \
")

    if(VCPKG_TARGET_ARCHITECTURE STREQUAL "x86" OR VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
        string(APPEND OPTIONS "\
--enable-cuda \
--enable-ffnvcodec \
--enable-hwaccel=h264_nvdec \
--enable-hwaccel=hevc_nvdec \
--enable-amf \
--enable-encoder=h264_amf \
--enable-encoder=hevc_amf \
--enable-encoder=h264_nvenc \
--enable-encoder=hevc_nvenc \
--enable-libmfx \
--enable-encoder=h264_qsv \
--enable-encoder=hevc_qsv \
")
    endif()

    if(VCPKG_TARGET_ARCHITECTURE STREQUAL "x86")
        set(LIB_MACHINE_ARG /machine:x86)
        string(APPEND OPTIONS " --arch=i686 --enable-cross-compile")
    elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
        set(LIB_MACHINE_ARG /machine:x64)
        string(APPEND OPTIONS " --arch=x86_64")
    elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
        set(LIB_MACHINE_ARG /machine:arm64)
        string(APPEND OPTIONS " --arch=aarch64 --enable-cross-compile")
    else()
        message(FATAL_ERROR "Unsupported target architecture")
    endif()
elseif(VCPKG_TARGET_IS_OSX)
    string(APPEND OPTIONS "\
--disable-autodetect \
--enable-videotoolbox \
--enable-encoder=h264_videotoolbox,hevc_videotoolbox \
--enable-hwaccel=h264_videotoolbox,hevc_videotoolbox \
")
elseif(VCPKG_TARGET_IS_IOS)
    string(APPEND OPTIONS "\
--arch=arm64 \
--disable-autodetect \
--disable-hwaccels \
--disable-encoders \
--disable-videotoolbox \
--extra-cflags=\"-arch arm64 -mios-version-min=8.0 -fembed-bitcode\" \
--extra-ldflags=\"-arch arm64 -mios-version-min=8.0 -fembed-bitcode\" \
")
elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Android")
    string(APPEND OPTIONS "\
--target-os=android \
--disable-asm \
--disable-iconv \
--enable-jni \
--enable-mediacodec \
--disable-hwaccels \
--enable-encoder=h264_mediacodec \
--enable-encoder=hevc_mediacodec \
--enable-decoder=h264_mediacodec \
--enable-decoder=hevc_mediacodec \
")
endif()

if(VCPKG_TARGET_IS_OSX)
    list(JOIN VCPKG_OSX_ARCHITECTURES " " OSX_ARCHS)
    list(LENGTH VCPKG_OSX_ARCHITECTURES OSX_ARCH_COUNT)
endif()

vcpkg_cmake_get_vars(cmake_vars_file)
include("${cmake_vars_file}")

if(VCPKG_DETECTED_MSVC)
    string(APPEND OPTIONS " --disable-inline-asm") # clang-cl has inline assembly but this leads to undefined symbols.
    set(OPTIONS "--toolchain=msvc ${OPTIONS}")

    # This is required because ffmpeg depends upon optimizations to link correctly
    string(APPEND VCPKG_COMBINED_C_FLAGS_DEBUG " -O2")
    string(REGEX REPLACE "(^| )-RTC1( |$)" " " VCPKG_COMBINED_C_FLAGS_DEBUG "${VCPKG_COMBINED_C_FLAGS_DEBUG}")
    string(REGEX REPLACE "(^| )-Od( |$)" " " VCPKG_COMBINED_C_FLAGS_DEBUG "${VCPKG_COMBINED_C_FLAGS_DEBUG}")
    string(REGEX REPLACE "(^| )-Ob0( |$)" " " VCPKG_COMBINED_C_FLAGS_DEBUG "${VCPKG_COMBINED_C_FLAGS_DEBUG}")
endif()

string(APPEND VCPKG_COMBINED_C_FLAGS_DEBUG " -I \"${CURRENT_INSTALLED_DIR}/include\"")
string(APPEND VCPKG_COMBINED_C_FLAGS_RELEASE " -I \"${CURRENT_INSTALLED_DIR}/include\"")

if(VCPKG_TARGET_IS_WINDOWS)
    string(APPEND VCPKG_COMBINED_C_FLAGS_DEBUG " -I \"${CURRENT_INSTALLED_DIR}/include/mfx\"")
    string(APPEND VCPKG_COMBINED_C_FLAGS_RELEASE " -I \"${CURRENT_INSTALLED_DIR}/include/mfx\"")
endif()

# # Setup vcpkg toolchain
set(prog_env "")

if(VCPKG_DETECTED_CMAKE_C_COMPILER)
    get_filename_component(CC_path "${VCPKG_DETECTED_CMAKE_C_COMPILER}" DIRECTORY)
    get_filename_component(CC_filename "${VCPKG_DETECTED_CMAKE_C_COMPILER}" NAME)
    set(ENV{CC} "${CC_filename}")
    string(APPEND OPTIONS " --cc=${CC_filename}")

    if(VCPKG_HOST_IS_WINDOWS)
        string(APPEND OPTIONS " --host_cc=${CC_filename}")
    endif()

    list(APPEND prog_env "${CC_path}")
endif()

if(VCPKG_DETECTED_CMAKE_CXX_COMPILER)
    get_filename_component(CXX_path "${VCPKG_DETECTED_CMAKE_CXX_COMPILER}" DIRECTORY)
    get_filename_component(CXX_filename "${VCPKG_DETECTED_CMAKE_CXX_COMPILER}" NAME)
    set(ENV{CXX} "${CXX_filename}")
    string(APPEND OPTIONS " --cxx=${CXX_filename}")

    # string(APPEND OPTIONS " --host_cxx=${CC_filename}")
    list(APPEND prog_env "${CXX_path}")
endif()

if(VCPKG_DETECTED_CMAKE_RC_COMPILER)
    get_filename_component(RC_path "${VCPKG_DETECTED_CMAKE_RC_COMPILER}" DIRECTORY)
    get_filename_component(RC_filename "${VCPKG_DETECTED_CMAKE_RC_COMPILER}" NAME)
    set(ENV{WINDRES} "${RC_filename}")
    string(APPEND OPTIONS " --windres=${RC_filename}")
    list(APPEND prog_env "${RC_path}")
endif()

if(VCPKG_DETECTED_CMAKE_LINKER AND VCPKG_TARGET_IS_WINDOWS AND NOT VCPKG_TARGET_IS_MINGW)
    get_filename_component(LD_path "${VCPKG_DETECTED_CMAKE_LINKER}" DIRECTORY)
    get_filename_component(LD_filename "${VCPKG_DETECTED_CMAKE_LINKER}" NAME)
    set(ENV{LD} "${LD_filename}")
    string(APPEND OPTIONS " --ld=${LD_filename}")

    # string(APPEND OPTIONS " --host_ld=${LD_filename}")
    list(APPEND prog_env "${LD_path}")
endif()

if(VCPKG_DETECTED_CMAKE_NM)
    get_filename_component(NM_path "${VCPKG_DETECTED_CMAKE_NM}" DIRECTORY)
    get_filename_component(NM_filename "${VCPKG_DETECTED_CMAKE_NM}" NAME)
    set(ENV{NM} "${NM_filename}")
    string(APPEND OPTIONS " --nm=${NM_filename}")
    list(APPEND prog_env "${NM_path}")
endif()

if(VCPKG_DETECTED_CMAKE_AR)
    get_filename_component(AR_path "${VCPKG_DETECTED_CMAKE_AR}" DIRECTORY)
    get_filename_component(AR_filename "${VCPKG_DETECTED_CMAKE_AR}" NAME)

    if(AR_filename MATCHES [[^(llvm-)?lib\.exe$]])
        set(ENV{AR} "ar-lib ${AR_filename}")
        string(APPEND OPTIONS " --ar='ar-lib ${AR_filename}'")
    else()
        set(ENV{AR} "${AR_filename}")
        string(APPEND OPTIONS " --ar='${AR_filename}'")
    endif()

    list(APPEND prog_env "${AR_path}")
endif()

if(VCPKG_DETECTED_CMAKE_RANLIB)
    get_filename_component(RANLIB_path "${VCPKG_DETECTED_CMAKE_RANLIB}" DIRECTORY)
    get_filename_component(RANLIB_filename "${VCPKG_DETECTED_CMAKE_RANLIB}" NAME)
    set(ENV{RANLIB} "${RANLIB_filename}")
    string(APPEND OPTIONS " --ranlib=${RANLIB_filename}")
    list(APPEND prog_env "${RANLIB_path}")
endif()

if(VCPKG_DETECTED_CMAKE_STRIP)
    get_filename_component(STRIP_path "${VCPKG_DETECTED_CMAKE_STRIP}" DIRECTORY)
    get_filename_component(STRIP_filename "${VCPKG_DETECTED_CMAKE_STRIP}" NAME)
    set(ENV{STRIP} "${STRIP_filename}")
    string(APPEND OPTIONS " --strip=${STRIP_filename}")
    list(APPEND prog_env "${STRIP_path}")
endif()

if(VCPKG_HOST_IS_WINDOWS)
    vcpkg_acquire_msys(MSYS_ROOT PACKAGES automake1.16)
    set(SHELL "${MSYS_ROOT}/usr/bin/bash.exe")
    list(APPEND prog_env "${MSYS_ROOT}/usr/bin" "${MSYS_ROOT}/usr/share/automake-1.16")
else()
    # find_program(SHELL bash)
endif()

list(REMOVE_DUPLICATES prog_env)
vcpkg_add_to_path(PREPEND ${prog_env})

# More? OBJCC BIN2C
file(REMOVE_RECURSE "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg" "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel")

set(FFMPEG_PKGCONFIG_MODULES libavutil)

set(OPTIONS_CROSS "--enable-cross-compile")

# ffmpeg needs --cross-prefix option to use appropriate tools for cross-compiling.
if(VCPKG_DETECTED_CMAKE_C_COMPILER MATCHES "([^\/]*-)gcc$")
    string(APPEND OPTIONS_CROSS " --cross-prefix=${CMAKE_MATCH_1}")
endif()

if(VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
    set(BUILD_ARCH "x86_64")
else()
    set(BUILD_ARCH ${VCPKG_TARGET_ARCHITECTURE})
endif()

if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm" OR VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
    if(VCPKG_TARGET_IS_WINDOWS)
        vcpkg_find_acquire_program(GASPREPROCESSOR)

        foreach(GAS_PATH ${GASPREPROCESSOR})
            get_filename_component(GAS_ITEM_PATH ${GAS_PATH} DIRECTORY)
            vcpkg_add_to_path("${GAS_ITEM_PATH}")
        endforeach(GAS_PATH)
    endif()
endif()

set(OPTIONS_DEBUG "--disable-optimizations")
set(OPTIONS_RELEASE "--enable-optimizations")

set(OPTIONS "${OPTIONS} ${OPTIONS_CROSS}")

if(VCPKG_TARGET_IS_MINGW)
    set(OPTIONS "${OPTIONS} --extra_cflags=-D_WIN32_WINNT=0x0601")
elseif(VCPKG_TARGET_IS_WINDOWS)
    set(OPTIONS "${OPTIONS} --extra-cflags=-DHAVE_UNISTD_H=0")
endif()

vcpkg_find_acquire_program(PKGCONFIG)
set(OPTIONS "${OPTIONS} --pkg-config=${PKGCONFIG}")

if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
    set(OPTIONS "${OPTIONS} --pkg-config-flags=--static")
endif()

message(STATUS "Building Options: ${OPTIONS}")

# Release build
if(NOT VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "release")
    if(VCPKG_DETECTED_MSVC)
        set(OPTIONS_RELEASE "${OPTIONS_RELEASE} --extra-ldflags=-libpath:\"${CURRENT_INSTALLED_DIR}/lib\"")
    else()
        set(OPTIONS_RELEASE "${OPTIONS_RELEASE} --extra-ldflags=-L\"${CURRENT_INSTALLED_DIR}/lib\"")
    endif()

    message(STATUS "Building Release Options: ${OPTIONS_RELEASE}")
    set(ENV{PKG_CONFIG_PATH} "${CURRENT_INSTALLED_DIR}/lib/pkgconfig")
    message(STATUS "Building ${PORT} for Release")
    file(MAKE_DIRECTORY "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel")

    # We use response files here as the only known way to handle spaces in paths
    set(crsp "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/cflags.rsp")
    string(REGEX REPLACE "-arch [A-Za-z0-9_]+" "" VCPKG_COMBINED_C_FLAGS_RELEASE_SANITIZED "${VCPKG_COMBINED_C_FLAGS_RELEASE}")
    file(WRITE "${crsp}" "${VCPKG_COMBINED_C_FLAGS_RELEASE_SANITIZED}")
    set(ldrsp "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/ldflags.rsp")
    string(REGEX REPLACE "-arch [A-Za-z0-9_]+" "" VCPKG_COMBINED_SHARED_LINKER_FLAGS_RELEASE_SANITIZED "${VCPKG_COMBINED_SHARED_LINKER_FLAGS_RELEASE}")
    file(WRITE "${ldrsp}" "${VCPKG_COMBINED_SHARED_LINKER_FLAGS_RELEASE_SANITIZED}")
    set(ENV{CFLAGS} "@${crsp}")

    # All tools except the msvc arm{,64} assembler accept @... as response file syntax.
    # For that assembler, there is no known way to pass in flags. We must hope that not passing flags will work acceptably.
    if(NOT VCPKG_DETECTED_MSVC OR NOT VCPKG_TARGET_ARCHITECTURE MATCHES "^arm")
        set(ENV{ASFLAGS} "@${crsp}")
    endif()

    set(ENV{LDFLAGS} "@${ldrsp}")
    set(ENV{ARFLAGS} "${VCPKG_COMBINED_STATIC_LINKER_FLAGS_RELEASE}")

    set(BUILD_DIR "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel")
    set(CONFIGURE_OPTIONS "${OPTIONS} ${OPTIONS_RELEASE}")
    set(INST_PREFIX "${CURRENT_PACKAGES_DIR}")

    configure_file("${CMAKE_CURRENT_LIST_DIR}/build.sh.in" "${BUILD_DIR}/build.sh" @ONLY)

    z_vcpkg_setup_pkgconfig_path(CONFIG RELEASE)

    vcpkg_execute_required_process(
        COMMAND "${SHELL}" ./build.sh
        WORKING_DIRECTORY "${BUILD_DIR}"
        LOGNAME "build-${TARGET_TRIPLET}-rel"
        SAVE_LOG_FILES ffbuild/config.log
    )

    z_vcpkg_restore_pkgconfig_path()
endif()

# Debug build
if(NOT VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
    if(VCPKG_DETECTED_MSVC)
        set(OPTIONS_DEBUG "${OPTIONS_DEBUG} --extra-ldflags=-libpath:\"${CURRENT_INSTALLED_DIR}/debug/lib\"")
    else()
        set(OPTIONS_DEBUG "${OPTIONS_DEBUG} --extra-ldflags=-L\"${CURRENT_INSTALLED_DIR}/debug/lib\"")
    endif()

    message(STATUS "Building Debug Options: ${OPTIONS_DEBUG}")
    set(ENV{LDFLAGS} "${VCPKG_COMBINED_SHARED_LINKER_FLAGS_DEBUG}")
    set(ENV{PKG_CONFIG_PATH} "${CURRENT_INSTALLED_DIR}/debug/lib/pkgconfig")
    message(STATUS "Building ${PORT} for Debug")
    file(MAKE_DIRECTORY "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg")
    set(crsp "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg/cflags.rsp")
    string(REGEX REPLACE "-arch [A-Za-z0-9_]+" "" VCPKG_COMBINED_C_FLAGS_DEBUG_SANITIZED "${VCPKG_COMBINED_C_FLAGS_DEBUG}")
    file(WRITE "${crsp}" "${VCPKG_COMBINED_C_FLAGS_DEBUG_SANITIZED}")
    set(ldrsp "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg/ldflags.rsp")
    string(REGEX REPLACE "-arch [A-Za-z0-9_]+" "" VCPKG_COMBINED_SHARED_LINKER_FLAGS_DEBUG_SANITIZED "${VCPKG_COMBINED_SHARED_LINKER_FLAGS_DEBUG}")
    file(WRITE "${ldrsp}" "${VCPKG_COMBINED_SHARED_LINKER_FLAGS_DEBUG_SANITIZED}")
    set(ENV{CFLAGS} "@${crsp}")

    if(NOT VCPKG_DETECTED_MSVC OR NOT VCPKG_TARGET_ARCHITECTURE MATCHES "^arm")
        set(ENV{ASFLAGS} "@${crsp}")
    endif()

    set(ENV{LDFLAGS} "@${ldrsp}")
    set(ENV{ARFLAGS} "${VCPKG_COMBINED_STATIC_LINKER_FLAGS_DEBUG}")

    set(BUILD_DIR "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg")
    set(CONFIGURE_OPTIONS "${OPTIONS} ${OPTIONS_DEBUG}")
    set(INST_PREFIX "${CURRENT_PACKAGES_DIR}/debug")

    configure_file("${CMAKE_CURRENT_LIST_DIR}/build.sh.in" "${BUILD_DIR}/build.sh" @ONLY)

    z_vcpkg_setup_pkgconfig_path(CONFIG DEBUG)

    vcpkg_execute_required_process(
        COMMAND "${SHELL}" ./build.sh
        WORKING_DIRECTORY "${BUILD_DIR}"
        LOGNAME "build-${TARGET_TRIPLET}-dbg"
        SAVE_LOG_FILES ffbuild/config.log
    )

    z_vcpkg_restore_pkgconfig_path()
endif()

if(VCPKG_TARGET_IS_WINDOWS)
    file(GLOB DEF_FILES "${CURRENT_PACKAGES_DIR}/lib/*.def" "${CURRENT_PACKAGES_DIR}/debug/lib/*.def")

    if(NOT VCPKG_TARGET_IS_MINGW)
        if(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
            set(LIB_MACHINE_ARG /machine:ARM)
        elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
            set(LIB_MACHINE_ARG /machine:ARM64)
        elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "x86")
            set(LIB_MACHINE_ARG /machine:x86)
        elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
            set(LIB_MACHINE_ARG /machine:x64)
        else()
            message(FATAL_ERROR "Unsupported target architecture")
        endif()

        foreach(DEF_FILE ${DEF_FILES})
            get_filename_component(DEF_FILE_DIR "${DEF_FILE}" DIRECTORY)
            get_filename_component(DEF_FILE_NAME "${DEF_FILE}" NAME)
            string(REGEX REPLACE "-[0-9]*\\.def" "${VCPKG_TARGET_STATIC_LIBRARY_SUFFIX}" OUT_FILE_NAME "${DEF_FILE_NAME}")
            file(TO_NATIVE_PATH "${DEF_FILE}" DEF_FILE_NATIVE)
            file(TO_NATIVE_PATH "${DEF_FILE_DIR}/${OUT_FILE_NAME}" OUT_FILE_NATIVE)
            message(STATUS "Generating ${OUT_FILE_NATIVE}")
            vcpkg_execute_required_process(
                COMMAND lib.exe "/def:${DEF_FILE_NATIVE}" "/out:${OUT_FILE_NATIVE}" ${LIB_MACHINE_ARG}
                WORKING_DIRECTORY "${CURRENT_PACKAGES_DIR}"
                LOGNAME "libconvert-${TARGET_TRIPLET}"
            )
        endforeach()
    endif()

    file(GLOB EXP_FILES "${CURRENT_PACKAGES_DIR}/lib/*.exp" "${CURRENT_PACKAGES_DIR}/debug/lib/*.exp")
    file(GLOB LIB_FILES "${CURRENT_PACKAGES_DIR}/bin/*${VCPKG_TARGET_STATIC_LIBRARY_SUFFIX}" "${CURRENT_PACKAGES_DIR}/debug/bin/*${VCPKG_TARGET_STATIC_LIBRARY_SUFFIX}")

    if(VCPKG_TARGET_IS_MINGW)
        file(GLOB LIB_FILES_2 "${CURRENT_PACKAGES_DIR}/bin/*.lib" "${CURRENT_PACKAGES_DIR}/debug/bin/*.lib")
    endif()

    set(files_to_remove ${EXP_FILES} ${LIB_FILES} ${LIB_FILES_2} ${DEF_FILES})

    if(files_to_remove)
        file(REMOVE ${files_to_remove})
    endif()
endif()

file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include" "${CURRENT_PACKAGES_DIR}/debug/share")

if(VCPKG_LIBRARY_LINKAGE STREQUAL "static")
    file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/bin" "${CURRENT_PACKAGES_DIR}/debug/bin")
endif()

vcpkg_copy_pdbs()

if(VCPKG_TARGET_IS_WINDOWS)
    set(_dirs "/")

    if(NOT VCPKG_BUILD_TYPE OR VCPKG_BUILD_TYPE STREQUAL "debug")
        list(APPEND _dirs "/debug/")
    endif()

    foreach(_debug IN LISTS _dirs)
        foreach(PKGCONFIG_MODULE IN LISTS FFMPEG_PKGCONFIG_MODULES)
            set(PKGCONFIG_FILE "${CURRENT_PACKAGES_DIR}${_debug}lib/pkgconfig/${PKGCONFIG_MODULE}.pc")

            # remove redundant cygwin style -libpath entries
            execute_process(
                COMMAND "${MSYS_ROOT}/usr/bin/cygpath.exe" -u "${CURRENT_INSTALLED_DIR}"
                OUTPUT_VARIABLE CYG_INSTALLED_DIR
                OUTPUT_STRIP_TRAILING_WHITESPACE
            )
            vcpkg_replace_string("${PKGCONFIG_FILE}" "-libpath:${CYG_INSTALLED_DIR}${_debug}lib/pkgconfig/../../lib " "")

            # transform libdir, includedir, and prefix paths from cygwin style to windows style
            file(READ "${PKGCONFIG_FILE}" PKGCONFIG_CONTENT)

            foreach(PATH_NAME prefix libdir includedir)
                string(REGEX MATCH "${PATH_NAME}=[^\n]*" PATH_VALUE "${PKGCONFIG_CONTENT}")
                string(REPLACE "${PATH_NAME}=" "" PATH_VALUE "${PATH_VALUE}")

                if(NOT PATH_VALUE)
                    message(FATAL_ERROR "failed to find pkgconfig variable ${PATH_NAME}")
                endif()

                execute_process(
                    COMMAND "${MSYS_ROOT}/usr/bin/cygpath.exe" -w "${PATH_VALUE}"
                    OUTPUT_VARIABLE FIXED_PATH
                    OUTPUT_STRIP_TRAILING_WHITESPACE
                )
                file(TO_CMAKE_PATH "${FIXED_PATH}" FIXED_PATH)
                vcpkg_replace_string("${PKGCONFIG_FILE}" "${PATH_NAME}=${PATH_VALUE}" "${PATH_NAME}=${FIXED_PATH}")
            endforeach()

            # list libraries with -l flag (so pkgconf knows they are libraries and not just linker flags)
            foreach(LIBS_ENTRY Libs Libs.private)
                string(REGEX MATCH "${LIBS_ENTRY}: [^\n]*" LIBS_VALUE "${PKGCONFIG_CONTENT}")

                if(NOT LIBS_VALUE)
                    message(FATAL_ERROR "failed to find pkgconfig entry ${LIBS_ENTRY}")
                endif()

                string(REPLACE "${LIBS_ENTRY}: " "" LIBS_VALUE "${LIBS_VALUE}")

                if(LIBS_VALUE)
                    set(LIBS_VALUE_OLD "${LIBS_VALUE}")
                    string(REGEX REPLACE "([^ ]+)[.]lib" "-l\\1" LIBS_VALUE "${LIBS_VALUE}")
                    set(LIBS_VALUE_NEW "${LIBS_VALUE}")
                    vcpkg_replace_string("${PKGCONFIG_FILE}" "${LIBS_ENTRY}: ${LIBS_VALUE_OLD}" "${LIBS_ENTRY}: ${LIBS_VALUE_NEW}")
                endif()
            endforeach()
        endforeach()
    endforeach()
endif()

vcpkg_fixup_pkgconfig()

# Handle dependencies
x_vcpkg_pkgconfig_get_modules(PREFIX FFMPEG_PKGCONFIG MODULES ${FFMPEG_PKGCONFIG_MODULES} LIBS)

function(append_dependencies_from_libs out)
    cmake_parse_arguments(PARSE_ARGV 1 "arg" "" "LIBS" "")
    string(REGEX REPLACE "[ ]+" ";" contents "${arg_LIBS}")
    list(FILTER contents EXCLUDE REGEX "^-F.+")
    list(FILTER contents EXCLUDE REGEX "^-framework$")
    list(FILTER contents EXCLUDE REGEX "^-L.+")
    list(FILTER contents EXCLUDE REGEX "^-libpath:.+")
    list(TRANSFORM contents REPLACE "^-Wl,-framework," "-l")
    list(FILTER contents EXCLUDE REGEX "^-Wl,.+")
    list(TRANSFORM contents REPLACE "^-l" "")
    list(FILTER contents EXCLUDE REGEX "^avutil$")
    list(FILTER contents EXCLUDE REGEX "^avcodec$")
    list(FILTER contents EXCLUDE REGEX "^avdevice$")
    list(FILTER contents EXCLUDE REGEX "^avfilter$")
    list(FILTER contents EXCLUDE REGEX "^avformat$")
    list(FILTER contents EXCLUDE REGEX "^postproc$")
    list(FILTER contents EXCLUDE REGEX "^swresample$")
    list(FILTER contents EXCLUDE REGEX "^swscale$")

    if(VCPKG_TARGET_IS_WINDOWS)
        list(TRANSFORM contents TOLOWER)
    endif()

    if(contents)
        list(APPEND "${out}" "${contents}")
        set("${out}" "${${out}}" PARENT_SCOPE)
    endif()
endfunction()

append_dependencies_from_libs(FFMPEG_DEPENDENCIES_RELEASE LIBS "${FFMPEG_PKGCONFIG_LIBS_RELEASE}")
append_dependencies_from_libs(FFMPEG_DEPENDENCIES_DEBUG LIBS "${FFMPEG_PKGCONFIG_LIBS_DEBUG}")

# must remove duplicates from the front to respect link order so reverse first
list(REVERSE FFMPEG_DEPENDENCIES_RELEASE)
list(REVERSE FFMPEG_DEPENDENCIES_DEBUG)
list(REMOVE_DUPLICATES FFMPEG_DEPENDENCIES_RELEASE)
list(REMOVE_DUPLICATES FFMPEG_DEPENDENCIES_DEBUG)
list(REVERSE FFMPEG_DEPENDENCIES_RELEASE)
list(REVERSE FFMPEG_DEPENDENCIES_DEBUG)

message(STATUS "Dependencies (release): ${FFMPEG_DEPENDENCIES_RELEASE}")
message(STATUS "Dependencies (debug):   ${FFMPEG_DEPENDENCIES_DEBUG}")

# Handle version strings
function(extract_regex_from_file out)
    cmake_parse_arguments(PARSE_ARGV 1 "arg" "MAJOR" "FILE_WITHOUT_EXTENSION;REGEX" "")
    file(READ "${arg_FILE_WITHOUT_EXTENSION}.h" contents)

    if(contents MATCHES "${arg_REGEX}")
        if(NOT CMAKE_MATCH_COUNT EQUAL 1)
            message(FATAL_ERROR "Could not identify match group in regular expression \"${arg_REGEX}\"")
        endif()
    else()
        if(arg_MAJOR)
            file(READ "${arg_FILE_WITHOUT_EXTENSION}_major.h" contents)

            if(contents MATCHES "${arg_REGEX}")
                if(NOT CMAKE_MATCH_COUNT EQUAL 1)
                    message(FATAL_ERROR "Could not identify match group in regular expression \"${arg_REGEX}\"")
                endif()
            else()
                message(WARNING "Could not find line matching \"${arg_REGEX}\" in file \"${arg_FILE_WITHOUT_EXTENSION}_major.h\"")
            endif()
        else()
            message(WARNING "Could not find line matching \"${arg_REGEX}\" in file \"${arg_FILE_WITHOUT_EXTENSION}.h\"")
        endif()
    endif()

    set("${out}" "${CMAKE_MATCH_1}" PARENT_SCOPE)
endfunction()

function(extract_version_from_component out)
    cmake_parse_arguments(PARSE_ARGV 1 "arg" "" "COMPONENT" "")
    string(TOLOWER "${arg_COMPONENT}" component_lower)
    string(TOUPPER "${arg_COMPONENT}" component_upper)
    extract_regex_from_file(major_version
        FILE_WITHOUT_EXTENSION "${SOURCE_PATH}/${component_lower}/version"
        MAJOR
        REGEX "#define ${component_upper}_VERSION_MAJOR[ ]+([0-9]+)"
    )
    extract_regex_from_file(minor_version
        FILE_WITHOUT_EXTENSION "${SOURCE_PATH}/${component_lower}/version"
        REGEX "#define ${component_upper}_VERSION_MINOR[ ]+([0-9]+)"
    )
    extract_regex_from_file(micro_version
        FILE_WITHOUT_EXTENSION "${SOURCE_PATH}/${component_lower}/version"
        REGEX "#define ${component_upper}_VERSION_MICRO[ ]+([0-9]+)"
    )
    set("${out}" "${major_version}.${minor_version}.${micro_version}" PARENT_SCOPE)
endfunction()

extract_regex_from_file(FFMPEG_VERSION
    FILE_WITHOUT_EXTENSION "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/libavutil/ffversion"
    REGEX "#define FFMPEG_VERSION[ ]+\"(.+)\""
)

extract_version_from_component(LIBAVUTIL_VERSION
    COMPONENT libavutil)
extract_version_from_component(LIBAVCODEC_VERSION
    COMPONENT libavcodec)
extract_version_from_component(LIBAVDEVICE_VERSION
    COMPONENT libavdevice)
extract_version_from_component(LIBAVFILTER_VERSION
    COMPONENT libavfilter)
extract_version_from_component(LIBAVFORMAT_VERSION
    COMPONENT libavformat)
extract_version_from_component(LIBSWRESAMPLE_VERSION
    COMPONENT libswresample)
extract_version_from_component(LIBSWSCALE_VERSION
    COMPONENT libswscale)

# Handle copyright
file(STRINGS "${CURRENT_BUILDTREES_DIR}/build-${TARGET_TRIPLET}-rel-out.log" LICENSE_STRING REGEX "License: .*" LIMIT_COUNT 1)

if(LICENSE_STRING STREQUAL "License: LGPL version 2.1 or later")
    set(LICENSE_FILE "COPYING.LGPLv2.1")
elseif(LICENSE_STRING STREQUAL "License: LGPL version 3 or later")
    set(LICENSE_FILE "COPYING.LGPLv3")
elseif(LICENSE_STRING STREQUAL "License: GPL version 2 or later")
    set(LICENSE_FILE "COPYING.GPLv2")
elseif(LICENSE_STRING STREQUAL "License: GPL version 3 or later")
    set(LICENSE_FILE "COPYING.GPLv3")
elseif(LICENSE_STRING STREQUAL "License: nonfree and unredistributable")
    set(LICENSE_FILE "COPYING.NONFREE")
    file(WRITE "${SOURCE_PATH}/${LICENSE_FILE}" "${LICENSE_STRING}")
else()
    message(FATAL_ERROR "Failed to identify license (${LICENSE_STRING})")
endif()

configure_file("${CMAKE_CURRENT_LIST_DIR}/vcpkg-cmake-wrapper.cmake" "${CURRENT_PACKAGES_DIR}/share/${PORT}/vcpkg-cmake-wrapper.cmake" @ONLY)
vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/${LICENSE_FILE}")
