cmake_modules/FindFFMPEG.cmake
author nemo
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# - Try to find ffmpeg libraries (libavcodec, libavformat and libavutil)
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# Once done this will define
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#
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#  FFMPEG_FOUND - system has ffmpeg or libav
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#  FFMPEG_INCLUDE_DIR - the ffmpeg include directory
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#  FFMPEG_LIBRARIES - Link these to use ffmpeg
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#  FFMPEG_LIBAVCODEC
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#  FFMPEG_LIBAVFORMAT
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#  FFMPEG_LIBAVUTIL
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#
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#  Copyright (c) 2008 Andreas Schneider <mail@cynapses.org>
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#  Modified for other libraries by Lasse Kärkkäinen <tronic>
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#  Modified for Hedgewars by Stepik777
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#
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#  Redistribution and use is allowed according to the terms of the New
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#  BSD license.
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#
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if (FFMPEG_LIBRARIES AND FFMPEG_INCLUDE_DIR)
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  # in cache already
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  set(FFMPEG_FOUND TRUE)
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else (FFMPEG_LIBRARIES AND FFMPEG_INCLUDE_DIR)
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  # use pkg-config to get the directories and then use these values
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  # in the FIND_PATH() and FIND_LIBRARY() calls
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  find_package(PkgConfig)
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  if (PKG_CONFIG_FOUND)
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    pkg_check_modules(_FFMPEG_AVCODEC libavcodec)
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    pkg_check_modules(_FFMPEG_AVFORMAT libavformat)
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    pkg_check_modules(_FFMPEG_AVUTIL libavutil)
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  endif (PKG_CONFIG_FOUND)
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  find_path(FFMPEG_AVCODEC_INCLUDE_DIR
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    NAMES libavcodec/avcodec.h
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    PATHS ${_FFMPEG_AVCODEC_INCLUDE_DIRS}
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        /usr/include /usr/local/include #system level
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        /opt/local/include #macports
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        /sw/include #fink
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    PATH_SUFFIXES ffmpeg libav
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  )
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  find_library(FFMPEG_LIBAVCODEC
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    NAMES avcodec
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    PATHS ${_FFMPEG_AVCODEC_LIBRARY_DIRS}
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        /usr/lib /usr/local/lib #system level
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        /opt/local/lib #macports
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        /sw/lib #fink
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  )
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  find_library(FFMPEG_LIBAVFORMAT
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    NAMES avformat
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    PATHS ${_FFMPEG_AVFORMAT_LIBRARY_DIRS}
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        /usr/lib /usr/local/lib #system level
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        /opt/local/lib #macports
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        /sw/lib #fink
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  )
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  find_library(FFMPEG_LIBAVUTIL
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    NAMES avutil
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    PATHS ${_FFMPEG_AVUTIL_LIBRARY_DIRS}
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        /usr/lib /usr/local/lib #system level
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        /opt/local/lib #macports
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        /sw/lib #fink
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  )
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  if (FFMPEG_LIBAVCODEC AND FFMPEG_LIBAVFORMAT)
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    set(FFMPEG_FOUND TRUE)
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  endif()
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  if (FFMPEG_FOUND)
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    set(FFMPEG_INCLUDE_DIR ${FFMPEG_AVCODEC_INCLUDE_DIR})
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    set(FFMPEG_LIBRARIES
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      ${FFMPEG_LIBAVCODEC}
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      ${FFMPEG_LIBAVFORMAT}
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      ${FFMPEG_LIBAVUTIL}
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    )
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    if (APPLE)
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      set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} "bz2" "-framework CoreVideo" "-framework VideoDecodeAcceleration")
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    endif(APPLE)
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  endif (FFMPEG_FOUND)
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  if (FFMPEG_FOUND)
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    if (NOT FFMPEG_FIND_QUIETLY)
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      message(STATUS "Found FFMPEG/LibAV: ${FFMPEG_LIBRARIES}, ${FFMPEG_INCLUDE_DIR}")
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    endif (NOT FFMPEG_FIND_QUIETLY)
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  else (FFMPEG_FOUND)
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    if (FFMPEG_FIND_REQUIRED)
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      message(FATAL_ERROR "Could NOT find libavcodec or libavformat or libavutil")
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    endif (FFMPEG_FIND_REQUIRED)
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  endif (FFMPEG_FOUND)
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endif (FFMPEG_LIBRARIES AND FFMPEG_INCLUDE_DIR)
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