132 lines
5.2 KiB
CMake
132 lines
5.2 KiB
CMake
# * Try to find the required ffmpeg components(default: AVFORMAT, AVUTIL, AVCODEC)
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#
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# Once done this will define FFMPEG_FOUND - System has the all required components. FFMPEG_INCLUDE_DIRS - Include directory necessary for
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# using the required components headers. FFMPEG_LIBRARIES - Link these to use the required ffmpeg components. FFMPEG_DEFINITIONS - Compiler
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# switches required for using the required ffmpeg components.
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#
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# For each of the components it will additionally set. - AVCODEC - AVDEVICE - AVFORMAT - AVUTIL - POSTPROCESS - SWSCALE the following variables will
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# be defined <component>_FOUND - System has <component> <component>_INCLUDE_DIRS - Include directory necessary for using the <component>
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# headers <component>_LIBRARIES - Link these to use <component> <component>_DEFINITIONS - Compiler switches required for using <component>
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# <component>_VERSION - The components version
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#
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# Copyright (c) 2006, Matthias Kretz, <kretz@kde.org> Copyright (c) 2008, Alexander Neundorf, <neundorf@kde.org> Copyright (c) 2011, Michael Jansen,
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# <kde@michael-jansen.biz>
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#
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# Redistribution and use is allowed according to the terms of the BSD license. For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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INCLUDE(FindPackageHandleStandardArgs)
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# The default components were taken from a survey over other FindFFMPEG.cmake files
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IF(NOT FFmpeg_FIND_COMPONENTS)
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SET(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL)
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ENDIF()
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#
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# Macro: set_component_found
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#
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# Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present.
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#
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MACRO(set_component_found _component)
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IF(${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS)
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# message(STATUS " - ${_component} found.")
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SET(${_component}_FOUND TRUE)
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ELSE()
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# message(STATUS " - ${_component} not found.")
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ENDIF()
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ENDMACRO()
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#
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# Macro: find_component
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#
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# Checks for the given component by invoking pkgconfig and then looking up the libraries and include directories.
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#
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MACRO(find_component _component _pkgconfig _library _header)
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IF(NOT WIN32)
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# use pkg-config to get the directories and then use these values in the FIND_PATH() and FIND_LIBRARY() calls
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FIND_PACKAGE(PkgConfig)
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IF(PKG_CONFIG_FOUND)
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PKG_CHECK_MODULES(PC_${_component} ${_pkgconfig})
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ENDIF()
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ENDIF(NOT WIN32)
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FIND_PATH(
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${_component}_INCLUDE_DIRS ${_header}
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HINTS ${PC_LIB${_component}_INCLUDEDIR} ${PC_LIB${_component}_INCLUDE_DIRS}
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PATH_SUFFIXES ffmpeg)
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FIND_LIBRARY(
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${_component}_LIBRARIES
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NAMES ${_library}
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HINTS ${PC_LIB${_component}_LIBDIR} ${PC_LIB${_component}_LIBRARY_DIRS})
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SET(${_component}_DEFINITIONS
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${PC_${_component}_CFLAGS_OTHER}
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CACHE STRING "The ${_component} CFLAGS.")
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SET(${_component}_VERSION
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${PC_${_component}_VERSION}
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CACHE STRING "The ${_component} version number.")
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SET_COMPONENT_FOUND(${_component})
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MARK_AS_ADVANCED(${_component}_INCLUDE_DIRS ${_component}_LIBRARIES ${_component}_DEFINITIONS ${_component}_VERSION)
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ENDMACRO()
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# Check for cached results. If there are skip the costly part.
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IF(NOT FFMPEG_LIBRARIES)
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# Check for all possible component.
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FIND_COMPONENT(AVCODEC libavcodec avcodec libavcodec/avcodec.h)
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FIND_COMPONENT(AVFORMAT libavformat avformat libavformat/avformat.h)
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FIND_COMPONENT(AVDEVICE libavdevice avdevice libavdevice/avdevice.h)
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FIND_COMPONENT(AVUTIL libavutil avutil libavutil/avutil.h)
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FIND_COMPONENT(SWSCALE libswscale swscale libswscale/swscale.h)
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FIND_COMPONENT(POSTPROC libpostproc postproc libpostproc/postprocess.h)
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# Check if the required components were found and add their stuff to the FFMPEG_* vars.
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FOREACH(_component ${FFmpeg_FIND_COMPONENTS})
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IF(${_component}_FOUND)
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# message(STATUS "Required component ${_component} present.")
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SET(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${${_component}_LIBRARIES})
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SET(FFMPEG_DEFINITIONS ${FFMPEG_DEFINITIONS} ${${_component}_DEFINITIONS})
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LIST(APPEND FFMPEG_INCLUDE_DIRS ${${_component}_INCLUDE_DIRS})
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ELSE()
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# message(STATUS "Required component ${_component} missing.")
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ENDIF()
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ENDFOREACH()
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# Build the include path with duplicates removed.
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IF(FFMPEG_INCLUDE_DIRS)
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LIST(REMOVE_DUPLICATES FFMPEG_INCLUDE_DIRS)
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ENDIF()
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# cache the vars.
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SET(FFMPEG_INCLUDE_DIRS
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${FFMPEG_INCLUDE_DIRS}
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CACHE STRING "The FFmpeg include directories." FORCE)
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SET(FFMPEG_LIBRARIES
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${FFMPEG_LIBRARIES}
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CACHE STRING "The FFmpeg libraries." FORCE)
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SET(FFMPEG_DEFINITIONS
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${FFMPEG_DEFINITIONS}
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CACHE STRING "The FFmpeg cflags." FORCE)
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MARK_AS_ADVANCED(FFMPEG_INCLUDE_DIRS FFMPEG_LIBRARIES FFMPEG_DEFINITIONS)
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ENDIF()
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# Now set the noncached _FOUND vars for the components.
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FOREACH(_component AVCODEC AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWSCALE)
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SET_COMPONENT_FOUND(${_component})
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ENDFOREACH()
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# Compile the list of required vars
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SET(_FFmpeg_REQUIRED_VARS FFMPEG_LIBRARIES FFMPEG_INCLUDE_DIRS)
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FOREACH(_component ${FFmpeg_FIND_COMPONENTS})
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LIST(APPEND _FFmpeg_REQUIRED_VARS ${_component}_LIBRARIES ${_component}_INCLUDE_DIRS)
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ENDFOREACH()
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# Give a nice error message if some of the required vars are missing.
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(FFmpeg DEFAULT_MSG ${_FFmpeg_REQUIRED_VARS})
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