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114 lines
4.3 KiB
CMake
114 lines
4.3 KiB
CMake
# vim: ts=2 sw=2
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# - Try to find the required ffmpeg components
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#
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# This module accepts the following env variable
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# FFMPEG_HOME - Can be set to custom install path
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#
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# Once done this will define
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# FFmpeg_FOUND - System has the all required components.
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# FFmpeg_INCLUDE_DIRS - Include directory necessary for using the required components headers.
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# FFmpeg_LIBRARIES - Link these to use the required ffmpeg components.
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# FFmpeg_DEFINITIONS - Compiler switches required for using the required ffmpeg 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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# - AVFORMAT
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# - AVUTIL
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# - POSTPROCESS
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# - SWSCALE
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# - SWRESAMPLE
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# the following variables will be defined
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# FFmpeg_<component>_FOUND - System has <component>
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# FFmpeg_<component>_INCLUDE_DIRS - Include directory necessary for using the <component> headers
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# FFmpeg_<component>_LIBRARIES - Link these to use <component>
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# FFmpeg_<component>_DEFINITIONS - Compiler switches required for using <component>
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# FFmpeg_<component>_VERSION - The components 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) 2016, Roman Proskuryakov, <humbug@deeptown.org>
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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(LibFindMacros)
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include(FindPackageHandleStandardArgs)
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# Macro: _internal_find_component
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# Checks for the given component by invoking pkgconfig etc.
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macro(_internal_find_component _component _pkgconfig _library _header)
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set(_package_component FFmpeg_${_component})
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libfind_pkg_detect(${_package_component} ${_pkgconfig}
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FIND_PATH ${_header}
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HINTS $ENV{FFMPEG_HOME}
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PATH_SUFFIXES include ffmpeg
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FIND_LIBRARY ${_library}
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HINTS $ENV{FFMPEG_HOME}
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PATH_SUFFIXES lib
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)
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set(${_package_component}_DEFINITIONS ${${_package_component}_PKGCONF_CFLAGS_OTHER})
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set(${_package_component}_VERSION ${${_package_component}_PKGCONF_VERSION})
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libfind_process(${_package_component})
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endmacro()
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# setter for 'hashmap'
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macro(hashmap_set _table _key) # ARGN
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set(${_table}_${_key} ${ARGN})
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endmacro()
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# check for key in 'hashmap'
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macro(hashmap_exists _table _key _out_var)
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if (DEFINED ${_table}_${_key})
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set(${_out_var} TRUE)
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else()
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set(${_out_var} FALSE)
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endif()
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endmacro()
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# getter for 'hashmap'
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macro(hashmap_get _table _key _out_var)
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set(${_out_var} ${${_table}_${_key}})
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endmacro()
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# fill 'hashmap' named find_args
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hashmap_set(find_args AVCODEC libavcodec avcodec libavcodec/avcodec.h)
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hashmap_set(find_args AVFORMAT libavformat avformat libavformat/avformat.h)
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hashmap_set(find_args AVDEVICE libavdevice avdevice libavdevice/avdevice.h)
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hashmap_set(find_args AVUTIL libavutil avutil libavutil/avutil.h)
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hashmap_set(find_args SWSCALE libswscale swscale libswscale/swscale.h)
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hashmap_set(find_args POSTPROC libpostproc postproc libpostproc/postprocess.h)
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hashmap_set(find_args SWRESAMPLE libswresample swresample libswresample/swresample.h)
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hashmap_set(find_args AVRESAMPLE libavresample avresample libavresample/avresample.h)
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# Check if the required components were found and add their stuff to the FFmpeg_* vars.
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foreach (_component ${FFmpeg_FIND_COMPONENTS})
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hashmap_exists(find_args ${_component} _known_component)
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if (NOT _known_component)
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message(FATAL_ERROR "Unknown component '${_component}'")
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endif()
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hashmap_get(find_args ${_component} _component_find_args)
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_internal_find_component(${_component} ${_component_find_args})
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set(_package_component FFmpeg_${_component})
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if (${_package_component}_FOUND)
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list(APPEND FFmpeg_LIBRARIES ${${_package_component}_LIBRARIES})
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list(APPEND FFmpeg_INCLUDE_DIRS ${${_package_component}_INCLUDE_DIRS})
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list(APPEND FFmpeg_DEFINITIONS ${${_package_component}_DEFINITIONS})
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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 (FFmpeg_INCLUDE_DIRS)
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list(REMOVE_DUPLICATES FFmpeg_INCLUDE_DIRS)
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endif()
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(FFmpeg
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FOUND_VAR FFmpeg_FOUND
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HANDLE_COMPONENTS
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REQUIRED_VARS
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FFmpeg_LIBRARIES
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FFmpeg_INCLUDE_DIRS
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)
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