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# - Try to find the required ffmpeg components(default: AVFORMAT, AVUTIL, AVCODEC)
#
# Once done this will define
# FFMPEG_FOUND - System has the all required components.
# FFMPEG_LIBRARIES - Link these to use the required ffmpeg components.
#
# For each of the components it will additionally set.
# - AVCODEC
# - AVDEVICE
# - AVFORMAT
# - AVFILTER
# - AVUTIL
# - POSTPROC
# - SWSCALE
# the following target will be defined
# FFmpeg::SDL::<component> - link to this target to
# the following variables will be defined
# FFmpeg_<component>_FOUND - System has <component>
# FFmpeg_<component>_INCLUDE_DIRS - Include directory necessary for using the <component> headers
# FFmpeg_<component>_LIBRARIES - Link these to use <component>
# FFmpeg_<component>_DEFINITIONS - Compiler switches required for using <component>
# FFmpeg_<component>_VERSION - The components version
#
# Copyright (c) 2006, Matthias Kretz, <kretz@kde.org>
# Copyright (c) 2008, Alexander Neundorf, <neundorf@kde.org>
# Copyright (c) 2011, Michael Jansen, <kde@michael-jansen.biz>
# Copyright (c) 2023, Sam lantinga, <slouken@libsdl.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
include(FindPackageHandleStandardArgs)
include("${CMAKE_CURRENT_LIST_DIR}/PkgConfigHelper.cmake")
# The default components were taken from a survey over other FindFFMPEG.cmake files
if(NOT FFmpeg_FIND_COMPONENTS)
set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL)
foreach(_component IN LISTS FFmpeg_FIND_COMPONENTS)
set(FFmpeg_FIND_REQUIRED_${_component} TRUE)
endforeach()
endif()
find_package(PkgConfig QUIET)
#
### 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
if(PKG_CONFIG_FOUND)
pkg_check_modules(PC_${_component} QUIET ${_pkgconfig})
endif()
find_path(FFmpeg_${_component}_INCLUDE_DIRS
NAMES ${_header}
HINTS
${PC_${_component}_INCLUDE_DIRS}
PATH_SUFFIXES
ffmpeg
)
find_library(FFmpeg_${_component}_LIBRARY
NAMES ${_library}
HINTS
${PC_${_component}_LIBRARY_DIRS}
)
if(FFmpeg_${_component}_INCLUDE_DIRS AND FFmpeg_${_component}_LIBRARY)
set(FFmpeg_${_component}_FOUND TRUE)
endif()
if(PC_${_component}_FOUND)
get_flags_from_pkg_config("${FFmpeg_${_component}_LIBRARY}" "PC_${_component}" "${_component}")
endif()
set(FFmpeg_${_component}_VERSION "${PC_${_component}_VERSION}")
set(FFmpeg_${_component}_COMPILE_OPTIONS "${${_component}_options}" CACHE STRING "Extra compile options of FFmpeg ${_component}")
set(FFmpeg_${_component}_LIBRARIES "${${_component}_link_libraries}" CACHE STRING "Extra link libraries of FFmpeg ${_component}")
set(FFmpeg_${_component}_LINK_OPTIONS "${${_component}_link_options}" CACHE STRING "Extra link flags of FFmpeg ${_component}")
set(FFmpeg_${_component}_LINK_DIRECTORIES "${${_component}_link_directories}" CACHE PATH "Extra link directories of FFmpeg ${_component}")
mark_as_advanced(
FFmpeg_${_component}_INCLUDE_DIRS
FFmpeg_${_component}_LIBRARY
FFmpeg_${_component}_COMPILE_OPTIONS
FFmpeg_${_component}_LIBRARIES
FFmpeg_${_component}_LINK_OPTIONS
FFmpeg_${_component}_LINK_DIRECTORIES
)
endmacro()
# 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)
# Compile the list of required vars
set(_FFmpeg_REQUIRED_VARS)
foreach(_component ${FFmpeg_FIND_COMPONENTS})
list(APPEND _FFmpeg_REQUIRED_VARS FFmpeg_${_component}_INCLUDE_DIRS FFmpeg_${_component}_LIBRARY)
endforeach ()
# Give a nice error message if some of the required vars are missing.
find_package_handle_standard_args(FFmpeg DEFAULT_MSG ${_FFmpeg_REQUIRED_VARS})
set(FFMPEG_LIBRARIES)
if(FFmpeg_FOUND)
foreach(_component IN LISTS FFmpeg_FIND_COMPONENTS)
if(FFmpeg_${_component}_FOUND)
list(APPEND FFMPEG_LIBRARIES FFmpeg::SDL::${_component})
if(NOT TARGET FFmpeg::SDL::${_component})
add_library(FFmpeg::SDL::${_component} UNKNOWN IMPORTED)
set_target_properties(FFmpeg::SDL::${_component} PROPERTIES
IMPORTED_LOCATION "${FFmpeg_${_component}_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${FFmpeg_${_component}_INCLUDE_DIRS}"
INTERFACE_COMPILE_OPTIONS "${FFmpeg_${_component}_COMPILE_OPTIONS}"
INTERFACE_LINK_LIBRARIES "${FFmpeg_${_component}_LIBRARIES}"
INTERFACE_LINK_OPTIONS "${FFmpeg_${_component}_LINK_OPTIONS}"
INTERFACE_LINK_DIRECTORIES "${FFmpeg_${_component}_LINK_DIRECTORIES}"
)
endif()
endif()
endforeach()
endif()
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