# vim: ts=2 sw=2 #[=======================================================================[.rst: FindFFmpeg ---------- Try to find the requested ffmpeg components(default: avformat, avutil, avcodec) IMPORTED targets ^^^^^^^^^^^^^^^^ This module defines :prop_tgt:`IMPORTED` targets ``FFmpeg:`` for each found component (see below). Components ^^^^^^^^^^ The module recognizes the following components: :: avcodec - target FFmpeg::avcodec avdevice - target FFmpeg::avdevice avformat - target FFmpeg::avformat avfilter - target FFmpeg::avfilter avutil - target FFmpeg::avutil postproc - target FFmpeg::postproc swscale - target FFmpeg::swscale swresample - target FFmpeg::swresample avresample - target FFmpeg::avresample Result Variables ^^^^^^^^^^^^^^^^ This module defines the following variables: :: FFMPEG_FOUND - System has the all required components. FFMPEG_INCLUDE_DIRS - Include directory necessary for using the required components headers. FFMPEG_LIBRARIES - Link these to use the required ffmpeg components. FFMPEG_DEFINITIONS - Compiler switches required for using the required ffmpeg components. For each component, ``_FOUND`` will be set if the component is available. For each ``_FOUND``, the following variables will be defined: :: _INCLUDE_DIRS - Include directory necessary for using the headers _LIBRARIES - Link these to use _DEFINITIONS - Compiler switches required for using _VERSION - The components version Backwards compatibility ^^^^^^^^^^^^^^^^^^^^^^^ For compatibility with previous versions of this module, uppercase names for FFmpeg and for all components are also recognized, and all-uppercase versions of the cache variables are also created. Copyright (c) 2006, Matthias Kretz, Copyright (c) 2008, Alexander Neundorf, Copyright (c) 2011, Michael Jansen, Copyright (c) 2019, FeRD (Frank Dana) Redistribution and use is allowed according to the terms of the BSD license. For details see the accompanying COPYING-CMAKE-SCRIPTS file. #]=======================================================================] include(FindPackageHandleStandardArgs) set(FFmpeg_ALL_COMPONENTS avcodec avdevice avformat avfilter avutil postproc swscale swresample avresample) # Default to all components, if not specified if (FFMPEG_FIND_COMPONENTS AND NOT FFmpeg_FIND_COMPONENTS) set(FFmpeg_FIND_COMPONENTS ${FFMPEG_FIND_COMPONENTS}) endif () if (NOT FFmpeg_FIND_COMPONENTS) set(FFmpeg_FIND_COMPONENTS ${FFmpeg_ALL_COMPONENTS}) endif () # ### Macro: set_component_found # # Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present. # macro(set_component_found _component ) if (${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS) # message(STATUS "FFmpeg - ${_component} found.") set(${_component}_FOUND TRUE) else () if (NOT FFmpeg_FIND_QUIETLY AND NOT FFMPEG_FIND_QUIETLY) message(STATUS "FFmpeg - ${_component} not found.") endif () endif () endmacro() # ### Macro: find_component # # Checks for the given component by invoking pkgconfig and then looking up the libraries and # include directories. # macro(find_component _component _pkgconfig _library _header) if (NOT WIN32) # use pkg-config to get the directories and then use these values # in the FIND_PATH() and FIND_LIBRARY() calls find_package(PkgConfig) if (PKG_CONFIG_FOUND) pkg_check_modules(PC_${_component} ${_pkgconfig}) endif () endif (NOT WIN32) find_path(${_component}_INCLUDE_DIRS ${_header} HINTS /opt/ /opt/include/ ${PC_${_component}_INCLUDEDIR} ${PC_${_component}_INCLUDE_DIRS} $ENV{FFMPEGDIR}/include/ $ENV{FFMPEGDIR}/include/ffmpeg/ PATH_SUFFIXES ffmpeg ) find_library(${_component}_LIBRARIES NAMES ${_library} HINTS ${PC_${_component}_LIBDIR} ${PC_${_component}_LIBRARY_DIRS} $ENV{FFMPEGDIR}/lib/ $ENV{FFMPEGDIR}/lib/ffmpeg/ $ENV{FFMPEGDIR}/bin/ ) set(${_component}_DEFINITIONS ${PC_${_component}_CFLAGS_OTHER} CACHE STRING "The ${_component} CFLAGS.") set(${_component}_VERSION ${PC_${_component}_VERSION} CACHE STRING "The ${_component} version number.") set_component_found(${_component}) mark_as_advanced( ${_component}_INCLUDE_DIRS ${_component}_LIBRARIES ${_component}_DEFINITIONS ${_component}_VERSION ) endmacro() # Check for cached results. If there are skip the costly part. if (NOT FFmpeg_LIBRARIES) # Check for all possible component. find_component(avcodec libavcodec avcodec libavcodec/avcodec.h) find_component(avdevice libavdevice avdevice libavdevice/avdevice.h) find_component(avformat libavformat avformat libavformat/avformat.h) find_component(avfilter libavfilter avfilter libavfilter/avfilter.h) find_component(avutil libavutil avutil libavutil/avutil.h) find_component(postproc libpostproc postproc libpostproc/postprocess.h) find_component(swscale libswscale swscale libswscale/swscale.h) find_component(swresample libswresample swresample libswresample/swresample.h) find_component(avresample libavresample avresample libavresample/avresample.h) else() # Just set the noncached _FOUND vars for the components. foreach(_component ${FFmpeg_ALL_COMPONENTS}) set_component_found(${_component}) endforeach () endif() # Check if the requested components were found and add their stuff to the FFmpeg_* vars. foreach (_component ${FFmpeg_FIND_COMPONENTS}) string(TOLOWER "${_component}" _component) if (${_component}_FOUND) # message(STATUS "Requested component ${_component} present.") set(FFmpeg_LIBRARIES ${FFmpeg_LIBRARIES} ${${_component}_LIBRARIES}) set(FFmpeg_DEFINITIONS ${FFmpeg_DEFINITIONS} ${${_component}_DEFINITIONS}) list(APPEND FFmpeg_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS}) else () # message(STATUS "Requested component ${_component} missing.") endif () endforeach () # Build the include path with duplicates removed. if (FFmpeg_INCLUDE_DIRS) list(REMOVE_DUPLICATES FFmpeg_INCLUDE_DIRS) endif () # cache the vars. set(FFmpeg_INCLUDE_DIRS ${FFmpeg_INCLUDE_DIRS} CACHE STRING "The FFmpeg include directories." FORCE) set(FFmpeg_LIBRARIES ${FFmpeg_LIBRARIES} CACHE STRING "The FFmpeg libraries." FORCE) set(FFmpeg_DEFINITIONS ${FFmpeg_DEFINITIONS} CACHE STRING "The FFmpeg cflags." FORCE) mark_as_advanced(FFmpeg_INCLUDE_DIRS FFmpeg_LIBRARIES FFmpeg_DEFINITIONS) # Backwards compatibility foreach(_suffix INCLUDE_DIRS LIBRARIES DEFINITIONS) get_property(_help CACHE FFmpeg_${_suffix} PROPERTY HELPSTRING) set(FFMPEG_${_suffix} ${FFmpeg_${_suffix}} CACHE STRING "${_help}" FORCE) mark_as_advanced(FFMPEG_${_suffix}) endforeach() foreach(_component ${FFmpeg_ALL_COMPONENTS}) if(${_component}_FOUND) string(TOUPPER "${_component}" _uc_component) set(${_uc_component}_FOUND TRUE) foreach(_suffix INCLUDE_DIRS LIBRARIES DEFINITIONS VERSION) get_property(_help CACHE ${_component}_${_suffix} PROPERTY HELPSTRING) set(${_uc_component}_${_suffix} ${${_component}_${_suffix}} CACHE STRING "${_help}" FORCE) mark_as_advanced(${_uc_component}_${_suffix}) endforeach() endif() endforeach() # Compile the list of required vars set(_FFmpeg_REQUIRED_VARS FFmpeg_LIBRARIES FFmpeg_INCLUDE_DIRS) foreach (_component ${FFmpeg_FIND_COMPONENTS}) list(APPEND _FFmpeg_REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS) endforeach () # Give a nice error message if some of the required vars are missing. find_package_handle_standard_args(FFmpeg DEFAULT_MSG ${_FFmpeg_REQUIRED_VARS}) # Export targets for each found component foreach (_component ${FFmpeg_ALL_COMPONENTS}) if(${_component}_FOUND) # message(STATUS "Creating IMPORTED target FFmpeg::${_component}") if(NOT TARGET FFmpeg::${_component}) add_library(FFmpeg::${_component} UNKNOWN IMPORTED) set_target_properties(FFmpeg::${_component} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${${_component}_INCLUDE_DIRS}") set_property(TARGET FFmpeg::${_component} APPEND PROPERTY INTERFACE_COMPILE_DEFINITIONS "${${_component}_DEFINITIONS}") set_property(TARGET FFmpeg::${_component} APPEND PROPERTY IMPORTED_LOCATION "${${_component}_LIBRARIES}") endif() endif() endforeach()