obs-StreamFX/cmake/modules/FindFFmpeg.cmake

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CMake
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2020-01-13 00:52:30 +00:00
#
# This module defines the following variables:
#
# FFMPEG_FOUND - All required components and the core library were found
# FFMPEG_INCLUDE_DIRS - Combined list of all components include dirs
# FFMPEG_LIBRARIES - Combined list of all componenets libraries
# FFMPEG_VERSION_STRING - Version of the first component requested
#
# For each requested component the following variables are defined:
#
# FFMPEG_<component>_FOUND - The component was found
# FFMPEG_<component>_INCLUDE_DIRS - The components include dirs
# FFMPEG_<component>_LIBRARIES - The components libraries
# FFMPEG_<component>_VERSION_STRING - The components version string
# FFMPEG_<component>_VERSION_MAJOR - The components major version
# FFMPEG_<component>_VERSION_MINOR - The components minor version
# FFMPEG_<component>_VERSION_MICRO - The components micro version
#
# <component> is the uppercase name of the component
find_package(PkgConfig QUIET)
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(_lib_suffix 64)
else()
set(_lib_suffix 32)
endif()
function(find_ffmpeg_library component header)
string(TOUPPER "${component}" component_u)
set(FFMPEG_${component_u}_FOUND FALSE PARENT_SCOPE)
set(FFmpeg_${component}_FOUND FALSE PARENT_SCOPE)
if(PKG_CONFIG_FOUND)
pkg_check_modules(PC_FFMPEG_${component} QUIET lib${component})
endif()
find_path(FFMPEG_${component}_INCLUDE_DIR
NAMES
"lib${component}/${header}" "lib${component}/version.h"
HINTS
ENV FFmpegPath${_lib_suffix}
ENV FFmpegPath
ENV DepsPath${_lib_suffix}
ENV DepsPath
${FFmpegPath${_lib_suffix}}
${FFmpegPath}
${DepsPath${_lib_suffix}}
${DepsPath}
${PC_FFMPEG_${component}_INCLUDE_DIRS}
PATHS
/usr/include /usr/local/include /opt/local/include /sw/include
PATH_SUFFIXES ffmpeg libav include)
find_library(FFMPEG_${component}_LIBRARY
NAMES
"${component}" "lib${component}"
HINTS
ENV FFmpegPath${_lib_suffix}
ENV FFmpegPath
ENV DepsPath${_lib_suffix}
ENV DepsPath
${FFmpegPath${_lib_suffix}}
${FFmpegPath}
${DepsPath${_lib_suffix}}
${DepsPath}
${PC_FFMPEG_${component}_LIBRARY_DIRS}
PATHS
/usr/lib /usr/local/lib /opt/local/lib /sw/lib
PATH_SUFFIXES
lib${_lib_suffix} lib
libs${_lib_suffix} libs
bin${_lib_suffix} bin
../lib${_lib_suffix} ../lib
../libs${_lib_suffix} ../libs
../bin${_lib_suffix} ../bin)
set(FFMPEG_${component_u}_INCLUDE_DIRS ${FFMPEG_${component}_INCLUDE_DIR} PARENT_SCOPE)
set(FFMPEG_${component_u}_LIBRARIES ${FFMPEG_${component}_LIBRARY} PARENT_SCOPE)
mark_as_advanced(FFMPEG_${component}_INCLUDE_DIR FFMPEG_${component}_LIBRARY)
if(FFMPEG_${component}_INCLUDE_DIR AND FFMPEG_${component}_LIBRARY)
set(FFMPEG_${component_u}_FOUND TRUE PARENT_SCOPE)
set(FFmpeg_${component}_FOUND TRUE PARENT_SCOPE)
list(APPEND FFMPEG_INCLUDE_DIRS ${FFMPEG_${component}_INCLUDE_DIR})
list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
set(FFMPEG_INCLUDE_DIRS "${FFMPEG_INCLUDE_DIRS}" PARENT_SCOPE)
list(APPEND FFMPEG_LIBRARIES ${FFMPEG_${component}_LIBRARY})
list(REMOVE_DUPLICATES FFMPEG_LIBRARIES)
set(FFMPEG_LIBRARIES "${FFMPEG_LIBRARIES}" PARENT_SCOPE)
set(FFMPEG_${component_u}_VERSION_STRING "unknown" PARENT_SCOPE)
set(_vfile "${FFMPEG_${component}_INCLUDE_DIR}/lib${component}/version.h")
if(EXISTS "${_vfile}")
file(STRINGS "${_vfile}" _version_parse REGEX "^.*VERSION_(MAJOR|MINOR|MICRO)[ \t]+[0-9]+[ \t]*$")
string(REGEX REPLACE ".*VERSION_MAJOR[ \t]+([0-9]+).*" "\\1" _major "${_version_parse}")
string(REGEX REPLACE ".*VERSION_MINOR[ \t]+([0-9]+).*" "\\1" _minor "${_version_parse}")
string(REGEX REPLACE ".*VERSION_MICRO[ \t]+([0-9]+).*" "\\1" _micro "${_version_parse}")
set(FFMPEG_${component_u}_VERSION_MAJOR "${_major}" PARENT_SCOPE)
set(FFMPEG_${component_u}_VERSION_MINOR "${_minor}" PARENT_SCOPE)
set(FFMPEG_${component_u}_VERSION_MICRO "${_micro}" PARENT_SCOPE)
set(FFMPEG_${component_u}_VERSION_STRING "${_major}.${_minor}.${_micro}" PARENT_SCOPE)
else()
message(STATUS "Failed parsing FFmpeg ${component} version")
endif()
endif()
endfunction()
set(FFMPEG_INCLUDE_DIRS)
set(FFMPEG_LIBRARIES)
if(NOT FFmpeg_FIND_COMPONENTS)
message(FATAL_ERROR "No FFmpeg components requested")
endif()
list(GET FFmpeg_FIND_COMPONENTS 0 _first_comp)
string(TOUPPER "${_first_comp}" _first_comp)
foreach(component ${FFmpeg_FIND_COMPONENTS})
if(component STREQUAL "avcodec")
find_ffmpeg_library("${component}" "avcodec.h")
elseif(component STREQUAL "avdevice")
find_ffmpeg_library("${component}" "avdevice.h")
elseif(component STREQUAL "avfilter")
find_ffmpeg_library("${component}" "avfilter.h")
elseif(component STREQUAL "avformat")
find_ffmpeg_library("${component}" "avformat.h")
elseif(component STREQUAL "avresample")
find_ffmpeg_library("${component}" "avresample.h")
elseif(component STREQUAL "avutil")
find_ffmpeg_library("${component}" "avutil.h")
elseif(component STREQUAL "postproc")
find_ffmpeg_library("${component}" "postprocess.h")
elseif(component STREQUAL "swresample")
find_ffmpeg_library("${component}" "swresample.h")
elseif(component STREQUAL "swscale")
find_ffmpeg_library("${component}" "swscale.h")
else()
message(FATAL_ERROR "Unknown FFmpeg component requested: ${component}")
endif()
endforeach()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(FFmpeg
FOUND_VAR FFMPEG_FOUND
REQUIRED_VARS FFMPEG_${_first_comp}_LIBRARIES FFMPEG_${_first_comp}_INCLUDE_DIRS
VERSION_VAR FFMPEG_${_first_comp}_VERSION_STRING
HANDLE_COMPONENTS)