#.rst: # FindFFmpeg # ---------- # # Try to find the required ffmpeg components (default: AVFORMAT, AVUTIL, AVCODEC) # # Next variables can be used to hint FFmpeg libs search: # # :: # # PC__LIBRARY_DIRS # PC_FFMPEG_LIBRARY_DIRS # PC__INCLUDE_DIRS # PC_FFMPEG_INCLUDE_DIRS # # Once done this will define # # :: # # 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_LIBRARY_DIRS - Link directories # FFMPEG_DEFINITIONS - Compiler switches required for using the required ffmpeg components. # # For each of the components it will additionally set. # # :: # # AVCODEC # AVDEVICE # AVFORMAT # AVFILTER # AVUTIL # POSTPROC # SWSCALE # # the following variables will be defined # # :: # # _FOUND - System has # _INCLUDE_DIRS - Include directory necessary for using the headers # _LIBRARIES - Link these to use # _LIBRARY_DIRS - Link directories # _DEFINITIONS - Compiler switches required for using # _VERSION - The components version # # the following import targets is created # # :: # # FFmpeg::FFmpeg - for all components # FFmpeg:: - where in lower case (FFmpeg::avcodec) for each components # # Windows cross building # ---------------------- # # pkg-config is used on the Nix platforms. You should point proper pkg-config wrappers: # # :: # # PKG_CONFIG_EXECUTABLE - simplest way is a ponting proper pkg-config wrapper, if provided: # # /usr/bin/x86_64-w64-mingw32-pkg-config # /usr/bin/i686-w64-mingw32-pkg-config # # Sample usage in the Toolchain file: # find_program(PKG_CONFIG_EXECUTABLE NAMES ${COMPILER_PREFIX}-pkg-config) # # It also can be pointed via ENV: # export PKG_CONFIG=... # # Env variables of the pkg-config: # see `man pkg-config` # # # Credits # ------- # # Copyright (c) 2006, Matthias Kretz, # Copyright (c) 2008, Alexander Neundorf, # Copyright (c) 2011, Michael Jansen, # Copyright (c) 2017, Alexander Drozdov, # # Redistribution and use is allowed according to the terms of the BSD license. # For details see the accompanying COPYING-CMAKE-SCRIPTS file. include(FindPackageHandleStandardArgs) # The default components were taken from a survey over other FindFFMPEG.cmake files if (NOT FFmpeg_FIND_COMPONENTS) set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL) endif () # ### Macro: set_component_found # # Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present. # macro(set_component_found _component ) if (${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS) # message(STATUS " - ${_component} found.") set(${_component}_FOUND TRUE) else () # message(STATUS " - ${_component} not found.") endif () endmacro() # ### Macro: find_component # # Checks for the given component by invoking pkgconfig and then looking up the libraries and # include directories. # macro(find_component _component _pkgconfig _library _header) # use pkg-config to get the directories and then use these values # in the FIND_PATH() and FIND_LIBRARY() calls find_package(PkgConfig) if (PKG_CONFIG_FOUND) pkg_check_modules(PC_${_component} ${_pkgconfig}) endif () find_path(${_component}_INCLUDE_DIRS ${_header} HINTS ${PC_${_component}_INCLUDEDIR} ${PC_${_component}_INCLUDE_DIRS} ${PC_FFMPEG_INCLUDE_DIRS} PATH_SUFFIXES ffmpeg ) find_library(${_component}_LIBRARY NAMES ${PC_${_component}_LIBRARIES} ${_library} HINTS ${PC_${_component}_LIBDIR} ${PC_${_component}_LIBRARY_DIRS} ${PC_FFMPEG_LIBRARY_DIRS} ) #message(STATUS "L0: ${${_component}_LIBRARIES}") #message(STATUS "L1: ${PC_${_component}_LIBRARIES}") #message(STATUS "L2: ${_library}") set(${_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}_LIBRARY_DIRS ${PC_${_component}_LIBRARY_DIRS} CACHE STRING "The ${_component} library dirs.") set(${_component}_LIBRARIES ${PC_${_component}_LIBRARIES} CACHE STRING "The ${_component} libraries.") set_component_found(${_component}) mark_as_advanced( ${_component}_LIBRARY ${_component}_INCLUDE_DIRS ${_component}_LIBRARY_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(AVFORMAT libavformat avformat libavformat/avformat.h) find_component(AVDEVICE libavdevice avdevice libavdevice/avdevice.h) find_component(AVUTIL libavutil avutil libavutil/avutil.h) find_component(AVFILTER libavfilter avfilter libavfilter/avfilter.h) find_component(SWSCALE libswscale swscale libswscale/swscale.h) find_component(POSTPROC libpostproc postproc libpostproc/postprocess.h) find_component(SWRESAMPLE libswresample swresample libswresample/swresample.h) # Check if the required components were found and add their stuff to the FFMPEG_* vars. foreach (_component ${FFmpeg_FIND_COMPONENTS}) if (${_component}_FOUND) message(STATUS "Libs: ${${_component}_LIBRARIES} | ${PC_${_component}_LIBRARIES}") # message(STATUS "Required component ${_component} present.") set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${${_component}_LIBRARY} ${${_component}_LIBRARIES}) set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${${_component}_DEFINITIONS}) list(APPEND FFMPEG_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS}) list(APPEND FFMPEG_LIBRARY_DIRS ${${_component}_LIBRARY_DIRS}) string(TOLOWER ${_component} _lowerComponent) if (NOT TARGET FFmpeg::${_lowerComponent}) add_library(FFmpeg::${_lowerComponent} INTERFACE IMPORTED) set_target_properties(FFmpeg::${_lowerComponent} PROPERTIES INTERFACE_COMPILE_OPTIONS "${${_component}_DEFINITIONS}" INTERFACE_INCLUDE_DIRECTORIES ${${_component}_INCLUDE_DIRS} INTERFACE_LINK_LIBRARIES "${${_component}_LIBRARY} ${${_component}_LIBRARIES} ${PC_${_component}_LIBRARIES}" INTERFACE_LINK_DIRECTORIES "${PC_${_component}_LIBDIR} ${PC_${_component}_LIBRARY_DIRS} ${PC_FFMPEG_LIBRARY_DIRS}" IMPORTED_LINK_INTERFACE_MULTIPLICITY 3) endif() else() # message(STATUS "Required 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) set(FFMPEG_LIBRARY_DIRS ${FFMPEG_LIBRARY_DIRS} CACHE STRING "The FFmpeg library dirs." FORCE) mark_as_advanced(FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES FFMPEG_DEFINITIONS FFMPEG_LIBRARY_DIRS) endif () if (NOT TARGET FFmpeg::FFmpeg) add_library(FFmpeg INTERFACE) set_target_properties(FFmpeg PROPERTIES INTERFACE_COMPILE_OPTIONS "${FFMPEG_DEFINITIONS}" INTERFACE_INCLUDE_DIRECTORIES ${FFMPEG_INCLUDE_DIRS} INTERFACE_LINK_LIBRARIES "${FFMPEG_LIBRARIES}" INTERFACE_LINK_DIRECTORIES "${FFMPEG_LIBRARY_DIRS}") add_library(FFmpeg::FFmpeg ALIAS FFmpeg) endif() # Now set the noncached _FOUND vars for the components. foreach (_component AVCODEC AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWSCALE) set_component_found(${_component}) 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})