diff options
Diffstat (limited to 'cmake/modules/FindFFMPEG.cmake')
| -rw-r--r-- | cmake/modules/FindFFMPEG.cmake | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/cmake/modules/FindFFMPEG.cmake b/cmake/modules/FindFFMPEG.cmake new file mode 100644 index 0000000000..cd1ebe34c8 --- /dev/null +++ b/cmake/modules/FindFFMPEG.cmake @@ -0,0 +1,166 @@ +#.rst: +# FindFFMPEG +# ---------- +# +# Try to find the required ffmpeg components (default: libavformat, libavutil, libavcodec) +# +# Next variables can be used to hint FFMPEG libs search: +# +# :: +# +# PC_<component>_LIBRARY_DIRS +# PC_FFMPEG_LIBRARY_DIRS +# PC_<component>_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_DEFINITIONS - Compiler switches required for using the required ffmpeg components. +# +# For each of the components it will additionally set. +# +# :: +# +# libavcodec +# libavdevice +# libavformat +# libavfilter +# libavutil +# libpostproc +# libswscale +# +# the following variables will be defined +# +# :: +# +# <component>_FOUND - System has <component> +# <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 +# +# the following import targets is created +# +# :: +# +# FFMPEG::FFMPEG - for all components +# FFMPEG::<component> - where <component> in lower case (FFMPEG::avcodec) for each components +# +# 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) 2017, Alexander Drozdov, <adrozdoff@gmail.com> +# Copyright (c) 2019, Jan Holthuis, <holthuis.jan@googlemail.com> +# +# 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 libavcodec libavformat libavutil) +endif () + +# +### 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 QUIET) + if (PkgConfig_FOUND) + pkg_check_modules(PC_FFMPEG_${_component} QUIET ${_pkgconfig}) + endif () + + find_path(FFMPEG_${_component}_INCLUDE_DIRS ${_header} + HINTS + ${PC_FFMPEG_${_component}_INCLUDEDIR} + ${PC_FFMPEG_${_component}_INCLUDE_DIRS} + ${PC_FFMPEG_INCLUDE_DIRS} + PATH_SUFFIXES + ffmpeg + ) + + find_library(FFMPEG_${_component}_LIBRARIES NAMES ${PC_FFMPEG_${_component}_LIBRARIES} ${_library} + HINTS + ${PC_FFMPEG_${_component}_LIBDIR} + ${PC_FFMPEG_${_component}_LIBRARY_DIRS} + ${PC_FFMPEG_LIBRARY_DIRS} + ) + + #message(STATUS ${FFMPEG_${_component}_LIBRARIES}) + #message(STATUS ${PC_FFMPEG_${_component}_LIBRARIES}) + + set(FFMPEG_${_component}_DEFINITIONS ${PC_FFMPEG_${_component}_CFLAGS_OTHER} CACHE STRING "The ${_component} CFLAGS.") + set(FFMPEG_${_component}_VERSION ${PC_FFMPEG_${_component}_VERSION} CACHE STRING "The ${_component} version number.") + + if (FFMPEG_${_component}_LIBRARIES AND FFMPEG_${_component}_INCLUDE_DIRS) + # message(STATUS " - ${_component} found.") + set(FFMPEG_${_component}_FOUND TRUE) + else () + # message(STATUS " - ${_component} not found.") + endif () + + mark_as_advanced( + FFMPEG_${_component}_INCLUDE_DIRS + FFMPEG_${_component}_LIBRARIES + FFMPEG_${_component}_DEFINITIONS + FFMPEG_${_component}_VERSION) + +endmacro() + + +# Check for all possible component. +find_component(libavcodec libavcodec avcodec libavcodec/avcodec.h) +find_component(libavformat libavformat avformat libavformat/avformat.h) +find_component(libavdevice libavdevice avdevice libavdevice/avdevice.h) +find_component(libavutil libavutil avutil libavutil/avutil.h) +find_component(libavfilter libavfilter avfilter libavfilter/avfilter.h) +find_component(libswscale libswscale swscale libswscale/swscale.h) +find_component(libpostproc libpostproc postproc libpostproc/postprocess.h) +find_component(libswresample libswresample swresample libswresample/swresample.h) + +set(FFMPEG_LIBRARIES "") +set(FFMPEG_DEFINITIONS "") +# Check if the required components were found and add their stuff to the FFMPEG_* vars. +foreach (_component ${FFMPEG_FIND_COMPONENTS}) + if (FFMPEG_${_component}_FOUND) + #message(STATUS "Required component ${_component} present.") + set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${FFMPEG_${_component}_LIBRARIES}) + set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${FFMPEG_${_component}_DEFINITIONS}) + list(APPEND FFMPEG_INCLUDE_DIRS ${FFMPEG_${_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) + +# Compile the list of required vars +set(_FFMPEG_REQUIRED_VARS FFMPEG_LIBRARIES FFMPEG_INCLUDE_DIRS) +foreach (_component ${FFMPEG_FIND_COMPONENTS}) + list(APPEND _FFMPEG_REQUIRED_VARS FFMPEG_${_component}_LIBRARIES FFMPEG_${_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}) |