# - Find library containing FFmpeg()
# The following variables are set if FFmpeg is found. If FFmpeg is not
# found, FFmpeg_FOUND is set to false.
#  FFmpeg_FOUND     - System has FFmpeg.
#  FFmpeg_LIBRARIES - Link these to use FFmpeg.
#  FFmpeg_CFLAGS - Link these to use FFmpeg.

if (NOT FFmpeg_SEARCHED)
    include(CheckLibraryExists)

    set(FFmpeg_SEARCHED TRUE CACHE INTERNAL "")
    set(FFmpeg_FOUND FALSE CACHE INTERNAL "")

    pkg_check_modules(FFmpeg libffmpeg)

    if (NOT FFmpeg_FOUND)
        set(FFmpeg_LIBRARIES "")
        foreach (library ffmpeg avcodec avformat avutil postproc swscale)
            find_library( ${library}_LIBRARY ${library} )
            if (${library}_LIBRARY)
                pkg_check_modules(${library}_LIBRARY lib${library})
                set(FFmpeg_LIBRARIES "${library};${FFmpeg_LIBRARIES}")

                if (${library}_LIBRARY_CFLAGS)
                    set(FFmpeg_CFLAGS ${FFmpeg_CFLAGS} ${${library}_LIBRARY_CFLAGS})
                endif (${library}_LIBRARY_CFLAGS)
                set(FFmpeg_FOUND TRUE CACHE INTERNAL "")
            endif (${library}_LIBRARY)
        endforeach (library)
        foreach (library a52 faac lame z png mp3lame twolame)
            find_library( ${library}_LIBRARY ${library} )
            if (${library}_LIBRARY)
                pkg_check_modules(${library}_LIBRARY lib${library})
                set(FFmpeg_LIBRARIES "${library};${FFmpeg_LIBRARIES}")

                if (${library}_LIBRARY_CFLAGS)
                    set(FFmpeg_CFLAGS ${FFmpeg_CFLAGS} ${${library}_LIBRARY_CFLAGS})
                endif (${library}_LIBRARY_CFLAGS)
            endif (${library}_LIBRARY)
        endforeach (library)
        set(FFmpeg_LIBRARIES "${FFmpeg_LIBRARIES}" CACHE INTERNAL STRING)
    endif (NOT FFmpeg_FOUND)

    if (FFmpeg_FOUND)
        if (NOT FFmpeg_FIND_QUIETLY)
            message(STATUS "Found FFmpeg in: ${FFmpeg_LIBRARIES}")
        endif (NOT FFmpeg_FIND_QUIETLY)
    else (FFmpeg_FOUND)
        if (FFmpeg_FIND_REQUIRED)
            message(FATAL_ERROR "Could not find the library containing FFmpeg")
        endif (FFmpeg_FIND_REQUIRED)
    endif (FFmpeg_FOUND)

    mark_as_advanced(FFmpeg_LIBRARIES)
endif(NOT FFmpeg_SEARCHED)