Celestia

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macro(find_ffmpeg_lib)
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  if(NOT(${ARGC} EQUAL 3))
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    message(FATAL_ERROR "find_ffmpeg_lib requires exactly 3 arguments")
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  endif()
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  set(__name   ${ARGV0})
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  set(__header ${ARGV1})
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  set(__lib    ${ARGV2})
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  find_library(${__name}_LIBRARY ${__lib})
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  find_path(${__name}_INCLUDE_DIR ${__header}
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    HINTS /usr/include/ffmpeg)
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  set(FPHSA_NAME_MISMATCHED 1)
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  find_package_handle_standard_args(${__name}
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                                  FOUND_VAR ${__name}_FOUND
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                                  REQUIRED_VARS ${__name}_INCLUDE_DIR ${__name}_LIBRARY
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                                  FAIL_MESSAGE "Failed to find ${__name}")
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  unset(FPHSA_NAME_MISMATCHED)
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  set(${__name}_INCLUDE_DIRS ${${__name}_INCLUDE_DIR})
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  set(${__name}_LIBRARIES ${${__name}_LIBRARY})
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  list(APPEND FFMPEG_INCLUDE_DIRS ${${__name}_INCLUDE_DIR})
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  list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
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  list(APPEND FFMPEG_LIBRARIES ${${__name}_LIBRARY})
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  list(REMOVE_DUPLICATES FFMPEG_LIBRARIES)
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  if(NOT TARGET FFMPEG::${__name})
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    add_library(FFMPEG::${__name} UNKNOWN IMPORTED)
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    set_target_properties(FFMPEG::${__name} PROPERTIES
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      INTERFACE_INCLUDE_DIRECTORIES "${${__name}_INCLUDE_DIR}"
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      IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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      IMPORTED_LOCATION "${${__name}_LIBRARY}")
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  endif()
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  mark_as_advanced(${__name}_INCLUDE_DIR ${__name}_LIBRARY ${__name}_INCLUDE_DIRS ${__name}_LIBRARIES)
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endmacro()
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include(FindPackageHandleStandardArgs)
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if(FFMPEG_FIND_COMPONENTS)
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  foreach(component ${FFMPEG_FIND_COMPONENTS})
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    string(TOUPPER ${component} _COMPONENT)
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    set(FFMPEG_USE_${_COMPONENT} 1)
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  endforeach()
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endif()
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set(FFMPEG_INCLUDE_DIRS)
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set(FFMPEG_LIBRARIES)
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if(FFMPEG_USE_AVCODEC)
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  find_ffmpeg_lib(AVCODEC libavcodec/avcodec.h avcodec)
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endif()
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if(FFMPEG_USE_AVFORMAT)
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  find_ffmpeg_lib(AVFORMAT libavformat/avformat.h avformat)
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endif()
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if(FFMPEG_USE_AVUTIL)
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  find_ffmpeg_lib(AVUTIL libavutil/avutil.h avutil)
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endif()
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if(FFMPEG_USE_AVDEVICE)
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  find_ffmpeg_lib(AVDEVICE libavdevice/avdevice.h avdevice)
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endif()
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if(FFMPEG_USE_SWSCALE)
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  find_ffmpeg_lib(SWSCALE libswscale/swscale.h swscale)
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endif()
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if(NOT TARGET FFMPEG::FFMPEG)
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  add_library(FFMPEG::FFMPEG UNKNOWN IMPORTED)
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  set_target_properties(FFMPEG::FFMPEG PROPERTIES
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    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
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    INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_INCLUDE_DIR}")
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  if(TARGET FFMPEG::AVCODEC)
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    set_target_properties(FFMPEG::FFMPEG PROPERTIES INTERFACE_LINK_LIBRARIES FFMPEG::AVCODEC)
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  endif()
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  if(TARGET FFMPEG::AVUTIL)
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    set_target_properties(FFMPEG::FFMPEG PROPERTIES INTERFACE_LINK_LIBRARIES FFMPEG::AVUTIL)
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  endif()
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  if(TARGET FFMPEG::AVDEVICE)
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    set_target_properties(FFMPEG::FFMPEG PROPERTIES INTERFACE_LINK_LIBRARIES FFMPEG::AVDEVICE)
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  endif()
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  if(TARGET FFMPEG::AVFORMAT)
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   set_target_properties(FFMPEG::FFMPEG PROPERTIES INTERFACE_LINK_LIBRARIES FFMPEG::AVFORMAT)
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  endif()
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  if(TARGET FFMPEG::SWSCALE)
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    set_target_properties(FFMPEG::FFMPEG PROPERTIES INTERFACE_LINK_LIBRARIES FFMPEG::SWSCALE)
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  endif()
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endif()
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