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Diffstat (limited to 'cmake/FindFFmpeg.cmake')
| -rw-r--r-- | cmake/FindFFmpeg.cmake | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/cmake/FindFFmpeg.cmake b/cmake/FindFFmpeg.cmake new file mode 100644 index 00000000..96cbb6ed --- /dev/null +++ b/cmake/FindFFmpeg.cmake @@ -0,0 +1,173 @@ +# vim: ts=2 sw=2 +# - 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_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 additionaly set. +# - AVCODEC +# - AVDEVICE +# - AVFORMAT +# - AVUTIL +# - POSTPROC +# - SWSCALE +# - SWRESAMPLE +# 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 +# +# Copyright (c) 2006, Matthias Kretz, <[email protected]> +# Copyright (c) 2008, Alexander Neundorf, <[email protected]> +# Copyright (c) 2011, Michael Jansen, <[email protected]> +# +# Redistribution and use is allowed according to the terms of the BSD license. + +include(FindPackageHandleStandardArgs) + +if(NOT FFmpeg_FIND_COMPONENTS) + set(FFmpeg_FIND_COMPONENTS AVFORMAT AVCODEC AVUTIL) +endif() + +# +### 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) + # message(STATUS " - ${_component} found.") + set(${_component}_FOUND TRUE) + else() + # message(STATUS " - ${_component} not found.") + endif() +endmacro() + +# +### Macro: find_component +# +# Checks for the given component by invoking pkgconfig and then looking up the libraries and +# include directories. +# +macro(find_component _component _pkgconfig _library _header) + if(NOT WIN32) + # use pkg-config to get the directories and then use these values + # in the FIND_PATH() and FIND_LIBRARY() calls + find_package(PkgConfig) + if(PKG_CONFIG_FOUND) + pkg_check_modules(PC_${_component} ${_pkgconfig}) + endif() + endif() + + find_path(${_component}_INCLUDE_DIRS ${_header} + HINTS + ${FFMPEGSDK_INC} + ${PC_LIB${_component}_INCLUDEDIR} + ${PC_LIB${_component}_INCLUDE_DIRS} + PATH_SUFFIXES + ffmpeg + ) + + find_library(${_component}_LIBRARIES NAMES ${_library} + HINTS + ${FFMPEGSDK_LIB} + ${PC_LIB${_component}_LIBDIR} + ${PC_LIB${_component}_LIBRARY_DIRS} + ) + + STRING(REGEX REPLACE "/.*" "/version.h" _ver_header ${_header}) + if(EXISTS "${${_component}_INCLUDE_DIRS}/${_ver_header}") + file(STRINGS "${${_component}_INCLUDE_DIRS}/${_ver_header}" version_str REGEX "^#define[\t ]+LIB${_component}_VERSION_M.*") + + foreach(_str "${version_str}") + if(NOT version_maj) + string(REGEX REPLACE "^.*LIB${_component}_VERSION_MAJOR[\t ]+([0-9]*).*$" "\\1" version_maj "${_str}") + endif() + if(NOT version_min) + string(REGEX REPLACE "^.*LIB${_component}_VERSION_MINOR[\t ]+([0-9]*).*$" "\\1" version_min "${_str}") + endif() + if(NOT version_mic) + string(REGEX REPLACE "^.*LIB${_component}_VERSION_MICRO[\t ]+([0-9]*).*$" "\\1" version_mic "${_str}") + endif() + endforeach() + unset(version_str) + + set(${_component}_VERSION "${version_maj}.${version_min}.${version_mic}" CACHE STRING "The ${_component} version number.") + unset(version_maj) + unset(version_min) + unset(version_mic) + endif(EXISTS "${${_component}_INCLUDE_DIRS}/${_ver_header}") + set(${_component}_VERSION ${PC_${_component}_VERSION} CACHE STRING "The ${_component} version number.") + set(${_component}_DEFINITIONS ${PC_${_component}_CFLAGS_OTHER} CACHE STRING "The ${_component} CFLAGS.") + + set_component_found(${_component}) + + mark_as_advanced( + ${_component}_INCLUDE_DIRS + ${_component}_LIBRARIES + ${_component}_DEFINITIONS + ${_component}_VERSION) +endmacro() + + +set(FFMPEGSDK $ENV{FFMPEG_HOME}) +if(FFMPEGSDK) + set(FFMPEGSDK_INC "${FFMPEGSDK}/include") + set(FFMPEGSDK_LIB "${FFMPEGSDK}/lib") +endif() + +# Check for all possible components. +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(SWSCALE libswscale swscale libswscale/swscale.h) +find_component(SWRESAMPLE libswresample swresample libswresample/swresample.h) +find_component(POSTPROC libpostproc postproc libpostproc/postprocess.h) + +# Check if the required components were found and add their stuff to the FFMPEG_* vars. +foreach(_component ${FFmpeg_FIND_COMPONENTS}) + if(${_component}_FOUND) + # message(STATUS "Required component ${_component} present.") + set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${${_component}_LIBRARIES}) + set(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${${_component}_DEFINITIONS}) + list(APPEND FFMPEG_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS}) + else() + # message(STATUS "Required component ${_component} missing.") + endif() +endforeach() + +# Build the include path and library list with duplicates removed. +if(FFMPEG_INCLUDE_DIRS) + list(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS) +endif() + +if(FFMPEG_LIBRARIES) + list(REMOVE_DUPLICATES FFMPEG_LIBRARIES) +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 ${FFMPEG_DEFINITIONS} CACHE STRING "The FFmpeg cflags." FORCE) + +mark_as_advanced(FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES FFMPEG_DEFINITIONS) + +# Now set the noncached _FOUND vars for the components. +foreach(_component AVCODEC AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWRESAMPLE SWSCALE) + set_component_found(${_component}) +endforeach () + +# 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 ${_component}_LIBRARIES ${_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}) |