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# SPDX-FileCopyrightText: 2006 Matthias Kretz <kretz@kde.org>
# SPDX-FileCopyrightText: 2008 Alexander Neundorf <neundorf@kde.org>
# SPDX-FileCopyrightText: 2011 Michael Jansen <kde@michael-jansen.biz>
# SPDX-FileCopyrightText: 2021 Stefan Brüns <stefan.bruens@rwth-aachen.de>
#
# SPDX-License-Identifier: BSD-3-Clause
#[=======================================================================[.rst:
FindFFmpeg
----------
Try to find FFmpeg components.
The following components are available::
AVCODEC AVFILTER AVDEVICE AVFORMAT
AVUTIL SWRESAMPLE SWSCALE POSTPROCESS
If no components are specified in the find_module call, the following ones
will be choosen as default::
AVFORMAT AVUTIL AVCODEC
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_DEFINITIONS``
Compiler switches required for using the required ffmpeg components.
Additonally for each of the components, the following variables will be defined:
``<component>_FOUND``
True if (the requestion version of) <component> is available
``<component>_INCLUDE_DIRS``
Include directory necessary for using the <component> headers
``<component>_LIBRARIES``
Link these to use <component>
``<component>_DEFINITIONS``
Compiler switches required for using <component>
``<component>_VERSION``
The components version
As the versions of the various FFmpeg components differ for a given release,
and CMake supports only one common version for all components, use the
following to specify required versions for multiple components:
.. code-block:: cmake
find_package(FFmpeg 57.48 COMPONENTS AVCODEC)
find_package(FFmpeg 57.40 COMPONENTS AVFORMAT)
find_package(FFmpeg 55.27 COMPONENTS AVUTIL)
Since 6.19.0.
#]=======================================================================]
include(FindPackageHandleStandardArgs)
if (NOT FFmpeg_FIND_COMPONENTS)
# The default components were taken from a survey over other FindFFMPEG.cmake files
set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL)
endif ()
list(LENGTH FFmpeg_FIND_COMPONENTS _numComponents)
if ((${_numComponents} GREATER 1) AND DEFINED ${FFmpeg_FIND_VERSION})
message(WARNING "Using a required version in combination with multiple COMPONENTS is not supported")
set(_FFmpeg_REQUIRED_VERSION 0)
elseif (DEFINED FFmpeg_FIND_VERSION)
set(_FFmpeg_REQUIRED_VERSION ${FFmpeg_FIND_VERSION})
else ()
set(_FFmpeg_REQUIRED_VERSION 0)
endif ()
set(_FFmpeg_ALL_COMPONENTS AVCODEC AVFILTER AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWRESAMPLE SWSCALE)
### Macro: set_component_found
#
# Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present.
macro(set_component_found _component )
if (${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS)
set(${_component}_FOUND TRUE)
set(FFmpeg_${_component}_FOUND TRUE)
endif ()
endmacro()
### Macro: find_component
#
# Checks for the given component by invoking pkgconfig and then looking up the libraries and
# include directories.
macro(find_component _component _pkgconfig _library _header)
if (NOT WIN32)
# use pkg-config to get the directories and then use these values
# in the FIND_PATH() and FIND_LIBRARY() calls
find_package(PkgConfig)
if (PKG_CONFIG_FOUND)
pkg_check_modules(PC_${_component} QUIET ${_pkgconfig})
endif ()
endif (NOT WIN32)
find_path(${_component}_INCLUDE_DIRS ${_header}
HINTS
${PC_LIB${_component}_INCLUDEDIR}
${PC_LIB${_component}_INCLUDE_DIRS}
PATH_SUFFIXES
ffmpeg
)
find_library(${_component}_LIBRARIES NAMES ${_library}
HINTS
${PC_LIB${_component}_LIBDIR}
${PC_LIB${_component}_LIBRARY_DIRS}
)
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(AVFILTER libavfilter avfilter libavfilter/avfilter.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(SWRESAMPLE libswresample swresample libswresample/swresample.h)
find_component(SWSCALE libswscale swscale libswscale/swscale.h)
find_component(POSTPROCESS libpostproc postproc libpostproc/postprocess.h)
# Check if the required components were found and add their stuff to the FFMPEG_* vars.
foreach (_component ${_FFmpeg_ALL_COMPONENTS})
if (${_component}_FOUND)
set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${${_component}_LIBRARIES})
set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${${_component}_DEFINITIONS})
list(APPEND FFMPEG_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS})
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)
else ()
# Set the noncached _FOUND vars for the components.
foreach (_component ${_FFmpeg_ALL_COMPONENTS})
set_component_found(${_component})
endforeach ()
endif ()
# Compile the list of required vars
unset(_FFmpeg_REQUIRED_VARS)
set(_FFmpeg_FOUND_LIBRARIES "")
foreach (_component ${FFmpeg_FIND_COMPONENTS})
if (${_component}_FOUND)
if (${_component}_VERSION VERSION_LESS _FFmpeg_REQUIRED_VERSION)
message(STATUS "${_component}: ${${_component}_VERSION} < ${_FFmpeg_REQUIRED_VERSION}")
unset(${_component}_FOUND)
endif ()
list(APPEND _FFmpeg_FOUND_LIBRARIES ${${_component}_LIBRARIES})
endif ()
list(APPEND _FFmpeg_REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS ${_component}_FOUND)
endforeach ()
list(INSERT _FFmpeg_REQUIRED_VARS 0 _FFmpeg_FOUND_LIBRARIES)
# Give a nice error message if some of the required vars are missing.
find_package_handle_standard_args(FFmpeg
REQUIRED_VARS ${_FFmpeg_REQUIRED_VARS}
HANDLE_COMPONENTS)
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