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Duckstation/CMakeModules/FindFFMPEG.cmake

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CMake
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#[==[
Provides the following variables:
* `FFMPEG_INCLUDE_DIRS`: Include directories necessary to use FFMPEG.
* `FFMPEG_LIBRARIES`: Libraries necessary to use FFMPEG. Note that this only
includes libraries for the components requested.
* `FFMPEG_VERSION`: The version of FFMPEG found.
The following components are supported:
* `avcodec`
* `avdevice`
* `avfilter`
* `avformat`
* `avresample`
* `avutil`
* `swresample`
* `swscale`
For each component, the following are provided:
* `FFMPEG_<component>_FOUND`: Libraries for the component.
* `FFMPEG_<component>_INCLUDE_DIRS`: Include directories for
the component.
* `FFMPEG_<component>_LIBRARIES`: Libraries for the component.
* `FFMPEG::<component>`: A target to use with `target_link_libraries`.
Note that only components requested with `COMPONENTS` or `OPTIONAL_COMPONENTS`
are guaranteed to set these variables or provide targets.
#]==]
function (_ffmpeg_find component headername)
find_path("FFMPEG_${component}_INCLUDE_DIR"
NAMES
"lib${component}/${headername}"
PATHS
"${FFMPEG_ROOT}/include"
"${CMAKE_PREFIX_PATH}/include"
~/Library/Frameworks
/Library/Frameworks
/usr/local/include
/usr/include
/sw/include # Fink
/opt/local/include # DarwinPorts
/opt/csw/include # Blastwave
/opt/include
/usr/freeware/include
PATH_SUFFIXES
ffmpeg
DOC "FFMPEG's ${component} include directory")
mark_as_advanced("FFMPEG_${component}_INCLUDE_DIR")
# On Windows, static FFMPEG is sometimes built as `lib<name>.a`.
if (WIN32)
list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".a" ".lib")
list(APPEND CMAKE_FIND_LIBRARY_PREFIXES "" "lib")
endif ()
find_library("FFMPEG_${component}_LIBRARY"
NAMES
"${component}"
PATHS
"${FFMPEG_ROOT}/lib"
"${CMAKE_PREFIX_PATH}/lib"
"${CMAKE_PREFIX_PATH}/lib64"
~/Library/Frameworks
/Library/Frameworks
/usr/local/lib
/usr/local/lib64
/usr/lib
/usr/lib64
/sw/lib
/opt/local/lib
/opt/csw/lib
/opt/lib
/usr/freeware/lib64
"${FFMPEG_ROOT}/bin"
DOC "FFMPEG's ${component} library")
mark_as_advanced("FFMPEG_${component}_LIBRARY")
if (FFMPEG_${component}_LIBRARY AND FFMPEG_${component}_INCLUDE_DIR)
set(_deps_found TRUE)
set(_deps_link)
foreach (_ffmpeg_dep IN LISTS ARGN)
if (TARGET "FFMPEG::${_ffmpeg_dep}")
list(APPEND _deps_link "FFMPEG::${_ffmpeg_dep}")
else ()
set(_deps_found FALSE)
endif ()
endforeach ()
if (_deps_found)
if (NOT TARGET "FFMPEG::${component}")
add_library("FFMPEG::${component}" UNKNOWN IMPORTED)
set_target_properties("FFMPEG::${component}" PROPERTIES
IMPORTED_LOCATION "${FFMPEG_${component}_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_${component}_INCLUDE_DIR}"
IMPORTED_LINK_INTERFACE_LIBRARIES "${_deps_link}")
endif ()
set("FFMPEG_${component}_FOUND" 1
PARENT_SCOPE)
set(version_header_path "${FFMPEG_${component}_INCLUDE_DIR}/lib${component}/version.h")
set(major_version_header_path "${FFMPEG_${component}_INCLUDE_DIR}/lib${component}/version_major.h")
if (EXISTS "${major_version_header_path}")
string(TOUPPER "${component}" component_upper)
file(STRINGS "${major_version_header_path}" major_version
REGEX "#define *LIB${component_upper}_VERSION_MAJOR ")
file(STRINGS "${version_header_path}" version
REGEX "#define *LIB${component_upper}_VERSION_(MINOR|MICRO) ")
string(REGEX REPLACE ".*_MAJOR *\([0-9]*\).*" "\\1" major "${major_version}")
string(REGEX REPLACE ".*_MINOR *\([0-9]*\).*" "\\1" minor "${version}")
string(REGEX REPLACE ".*_MICRO *\([0-9]*\).*" "\\1" micro "${version}")
if (NOT major STREQUAL "" AND
NOT minor STREQUAL "" AND
NOT micro STREQUAL "")
set("FFMPEG_${component}_VERSION" "${major}.${minor}.${micro}"
PARENT_SCOPE)
endif ()
elseif (EXISTS "${version_header_path}")
string(TOUPPER "${component}" component_upper)
file(STRINGS "${version_header_path}" version
REGEX "#define *LIB${component_upper}_VERSION_(MAJOR|MINOR|MICRO) ")
string(REGEX REPLACE ".*_MAJOR *\([0-9]*\).*" "\\1" major "${version}")
string(REGEX REPLACE ".*_MINOR *\([0-9]*\).*" "\\1" minor "${version}")
string(REGEX REPLACE ".*_MICRO *\([0-9]*\).*" "\\1" micro "${version}")
if (NOT major STREQUAL "" AND
NOT minor STREQUAL "" AND
NOT micro STREQUAL "")
set("FFMPEG_${component}_VERSION" "${major}.${minor}.${micro}"
PARENT_SCOPE)
endif ()
endif ()
else ()
set("FFMPEG_${component}_FOUND" 0
PARENT_SCOPE)
set(what)
if (NOT FFMPEG_${component}_LIBRARY)
set(what "library")
endif ()
if (NOT FFMPEG_${component}_INCLUDE_DIR)
if (what)
string(APPEND what " or headers")
else ()
set(what "headers")
endif ()
endif ()
set("FFMPEG_${component}_NOT_FOUND_MESSAGE"
"Could not find the ${what} for ${component}."
PARENT_SCOPE)
endif ()
endif ()
endfunction ()
_ffmpeg_find(avutil avutil.h)
_ffmpeg_find(avresample avresample.h
avutil)
_ffmpeg_find(swresample swresample.h
avutil)
_ffmpeg_find(swscale swscale.h
avutil)
_ffmpeg_find(avcodec avcodec.h
avutil)
_ffmpeg_find(avformat avformat.h
avcodec avutil)
_ffmpeg_find(avfilter avfilter.h
avutil)
_ffmpeg_find(avdevice avdevice.h
avformat avutil)
if (TARGET FFMPEG::avutil)
set(_ffmpeg_version_header_path "${FFMPEG_avutil_INCLUDE_DIR}/libavutil/ffversion.h")
if (EXISTS "${_ffmpeg_version_header_path}")
file(STRINGS "${_ffmpeg_version_header_path}" _ffmpeg_version
REGEX "FFMPEG_VERSION")
string(REGEX REPLACE ".*\"n?\(.*\)\"" "\\1" FFMPEG_VERSION "${_ffmpeg_version}")
unset(_ffmpeg_version)
else ()
set(FFMPEG_VERSION FFMPEG_VERSION-NOTFOUND)
endif ()
unset(_ffmpeg_version_header_path)
endif ()
set(FFMPEG_INCLUDE_DIRS)
set(FFMPEG_LIBRARIES)
set(_ffmpeg_required_vars)
foreach (_ffmpeg_component IN LISTS FFMPEG_FIND_COMPONENTS)
if (TARGET "FFMPEG::${_ffmpeg_component}")
set(FFMPEG_${_ffmpeg_component}_INCLUDE_DIRS
"${FFMPEG_${_ffmpeg_component}_INCLUDE_DIR}")
set(FFMPEG_${_ffmpeg_component}_LIBRARIES
"${FFMPEG_${_ffmpeg_component}_LIBRARY}")
list(APPEND FFMPEG_INCLUDE_DIRS
"${FFMPEG_${_ffmpeg_component}_INCLUDE_DIRS}")
list(APPEND FFMPEG_LIBRARIES
"${FFMPEG_${_ffmpeg_component}_LIBRARIES}")
if (FFMEG_FIND_REQUIRED_${_ffmpeg_component})
list(APPEND _ffmpeg_required_vars
"FFMPEG_${_ffmpeg_required_vars}_INCLUDE_DIRS"
"FFMPEG_${_ffmpeg_required_vars}_LIBRARIES")
endif ()
endif ()
endforeach ()
unset(_ffmpeg_component)
if (FFMPEG_INCLUDE_DIRS)
list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
endif ()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(FFMPEG
REQUIRED_VARS FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES ${_ffmpeg_required_vars}
VERSION_VAR FFMPEG_VERSION
HANDLE_COMPONENTS)
unset(_ffmpeg_required_vars)
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