87 lines
3.6 KiB
CMake
87 lines
3.6 KiB
CMake
# vim: ts=2 sw=2
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# - Try to find the required libav components(default: AVFORMAT, AVUTIL, AVCODEC)
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#
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# Once done this will define
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# LIBAV_FOUND - System has the all required components.
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# LIBAV_INCLUDE_DIRS - Include directory necessary for using the required components headers.
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# LIBAV_LIBRARIES - Link these to use the required libav components.
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#
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# For each of the components it will additionally set.
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# - AVCODEC
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# - AVDEVICE
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# - AVFILTER
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# - AVFORMAT
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# - AVRESAMPLE
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# - AVUTIL
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# - SWSCALE
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# the following variables will be defined
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# <component>_FOUND - System has <component>
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# <component>_INCLUDE_DIRS - Include directory necessary for using the <component> headers
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# <component>_LIBRARIES - Link these to use <component>
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# <component>_VERSION_STRING - The component's version
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#
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# Copyright (c) 2006, Matthias Kretz, <kretz@kde.org>
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# Copyright (c) 2008, Alexander Neundorf, <neundorf@kde.org>
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# Copyright (c) 2011, Michael Jansen, <kde@michael-jansen.biz>
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# Copyright (c) 2013,2015 Stephen Baker <baker.stephen.e@gmail.com>
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# Copyright (c) 2015, Alexander Bessman
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#
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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include(FindPackageHandleStandardArgs)
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include(${CMAKE_CURRENT_LIST_DIR}/CMakeFFmpegLibavMacros.cmake)
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# The default components were taken from a survey over other FindLIBAV.cmake files
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if(NOT LibAV_FIND_COMPONENTS)
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set(LibAV_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL)
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endif()
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# Check for cached results. If there are skip the costly part.
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if(NOT LIBAV_LIBRARIES)
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# Check for all possible component.
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find_component(AVCODEC avcodec libavcodec/avcodec.h libavcodec/version.h)
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find_component(AVFORMAT avformat libavformat/avformat.h libavformat/version.h)
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find_component(AVDEVICE avdevice libavdevice/avdevice.h libavdevice/version.h)
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find_component(AVFILTER avfilter libavfilter/avfilter.h libavfilter/version.h)
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find_component(AVRESAMPLE avresample libavresample/avresample.h libavresample/version.h)
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find_component(AVUTIL avutil libavutil/avutil.h libavutil/version.h)
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find_component(SWSCALE swscale libswscale/swscale.h libswscale/version.h)
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# Check if the required components were found and add their stuff to the LIBAV_* vars.
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foreach(_component ${LibAV_FIND_COMPONENTS})
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if(${_component}_FOUND)
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# message(STATUS "Required component ${_component} present.")
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set(LIBAV_LIBRARIES ${LIBAV_LIBRARIES} ${${_component}_LIBRARIES})
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list(APPEND LIBAV_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS})
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else()
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# message(STATUS "Required component ${_component} missing.")
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endif()
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endforeach()
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# Build the include path with duplicates removed.
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if(LIBAV_INCLUDE_DIRS)
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list(REMOVE_DUPLICATES LIBAV_INCLUDE_DIRS)
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endif()
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# cache the vars.
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set(LIBAV_INCLUDE_DIRS ${LIBAV_INCLUDE_DIRS} CACHE STRING "The LibAV include directories." FORCE)
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set(LIBAV_LIBRARIES ${LIBAV_LIBRARIES} CACHE STRING "The LibAV libraries." FORCE)
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mark_as_advanced(LIBAV_INCLUDE_DIRS LIBAV_LIBRARIES)
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endif()
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# Now set the noncached _FOUND vars for the components.
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foreach(_component AVCODEC AVDEVICE AVFILTER AVFORMAT AVRESAMPLE AVUTIL SWSCALE)
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set_component_found(${_component})
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endforeach()
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# Compile the list of required vars
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set(_LibAV_REQUIRED_VARS LIBAV_LIBRARIES LIBAV_INCLUDE_DIRS)
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foreach(_component ${LibAV_FIND_COMPONENTS})
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list(APPEND _LibAV_REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS)
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endforeach()
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# Give a nice error message if some of the required vars are missing.
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find_package_handle_standard_args(LibAV DEFAULT_MSG ${_LibAV_REQUIRED_VARS})
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