External_Ex/ffmpeg/FindFFMPEG.cmake

#国密加解密库

message(STATUS "***** Find FFMEPG Library *****")

#寻找头文件
# find_path(FFMPEG_INCLUDE_DIR
#     NAMES libavformat/avformat.h
#     PATHS ${CMAKE_CURRENT_LIST_DIR}/include
#     NO_DEFAULT_PATH
# )


unset(FFMPEG_INCLUDE_DIR)
unset(FFMPEG_LIBRARY)

#查找库文件，需要判断操作系统，位数
if(CMAKE_SYSTEM_NAME MATCHES "Windows")
    list(APPEND FFMPEG_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/include)
    if(CMAKE_CXX_COMPILER_ID MATCHES GNU)
        if(CMAKE_SIZEOF_VOID_P EQUAL 8)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libavcodec.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libavdevice.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libavfilter.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libavformat.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libavutil.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libswresample.dll.a)
            list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/libswscale.dll.a)
            
        elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
            message(STATUS "Not support 32bit GNU Compiler")
        endif()
    elseif(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/avcodec.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/avdevice.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/avfilter.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/avformat.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/avutil.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/swresample.lib)
        list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg-n5.1.6/lib/swscale.lib)
    endif()
#添加Linux版本
elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
    list(APPEND FFMPEG_INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/include)

    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libavcodec.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libavdevice.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libavfilter.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libavformat.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libavutil.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libswresample.so)
    list(APPEND FFMPEG_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/ffmpeg4.4.5/libs/linux/libswscale.so)
endif()


#设置查找到后的变量
if(FFMPEG_INCLUDE_DIR AND FFMPEG_LIBRARY)
    set(FFMPEG_FOUND TRUE)
    if(CMAKE_SYSTEM_NAME MATCHES "Windows")
        set(FFMPEG_VERSION n5.1.6)
    elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
        set(FFMPEG_VERSION 4.4.5)
    endif()
    message(STATUS "include : FFMPEG_INCLUDE_DIR")
    message(STATUS "Library : FFMPEG_LIBRARY")
else()
    set(FFMPEG_FOUND FALSE)
endif()



message(STATUS "---------------------------------")