Git commit b93c97454b36b5498e9abcec6beb1daf8839e3d7 by Michael Jansen. Committed on 29/06/2011 at 23:26. Pushed by mjansen into branch 'master'.
Rewritten FindFFmpeg.cmake - Checks for all modules individually (pkgconfig) - Supports components - Provides versions - Supports all ffmpeg modules. CCMAIL: [email protected] M +132 -100 cmake/modules/FindFFmpeg.cmake http://commits.kde.org/kdelibs/b93c97454b36b5498e9abcec6beb1daf8839e3d7 diff --git a/cmake/modules/FindFFmpeg.cmake b/cmake/modules/FindFFmpeg.cmake index d6259b0..526be5f 100644 --- a/cmake/modules/FindFFmpeg.cmake +++ b/cmake/modules/FindFFmpeg.cmake @@ -1,116 +1,148 @@ -# - Try to find ffmpeg +# 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 +# - POSTPROCESS +# - SWSCALE +# 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 # -# FFMPEG_FOUND - system has ffmpeg -# FFMPEG_INCLUDE_DIR - Include directory necessary for using the ffmpeg headers -# FFMPEG_LIBRARIES - Link these to use ffmpeg -# FFMPEG_DEFINITIONS - Compiler switches required for using ffmpeg - # 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. # For details see the accompanying COPYING-CMAKE-SCRIPTS file. +include(FindPackageHandleStandardArgs) -if (FFMPEG_LIBRARIES) - - # in cache already - set(FFMPEG_FOUND TRUE) - -else (FFMPEG_LIBRARIES) - -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) - pkg_check_modules(PC_LIBAVCODEC libavcodec) - set(FFMPEG_DEFINITIONS ${PC_LIBAVCODEC_CFLAGS_OTHER}) - -endif (NOT WIN32) - - # - # #include <libXXXX/XXXX.h> is the new style for FFMPEG headers - # This has been verified at least since 0.4.9 - # Please do not change to the old format, since this will break for - # people who are using newer versions. Instead, upgrade your ffmpeg - # installation. - # - find_path(FFMPEG_INCLUDE_DIR libavcodec/avcodec.h - HINTS - ${PC_LIBAVCODEC_INCLUDEDIR} - ${PC_LIBAVCODEC_INCLUDE_DIRS} - ) - - # also search for the old style include dir, just for the purpose - # of giving a useful error message if an old libavcodec is installed - # and the user might wonder why it is not found - find_path(FFMPEG_INCLUDE_DIR_OLD_STYLE ffmpeg/avcodec.h - HINTS - ${PC_LIBAVCODEC_INCLUDEDIR} - ${PC_LIBAVCODEC_INCLUDE_DIRS} - ) +# The default components were taken from a survey over other FindFFMPEG.cmake files +if (NOT FFmpeg_FIND_COMPONENTS) + set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVUTIL) +endif () - find_library(AVCODEC_LIBRARIES NAMES avcodec - HINTS - ${PC_LIBAVCODEC_LIBDIR} - ${PC_LIBAVCODEC_LIBRARY_DIRS} - ) +# +### Macro: set_component_found +# +# Marks the given component as found if both *_LIBRARIES AND *_INCLUDE_DIRS is present. +# +macro(set_component_found _component ) + if (${_component}_LIBRARIES AND ${_component}_INCLUDE_DIRS) + # message(STATUS " - ${_component} found.") + set(${_component}_FOUND TRUE) + else () + # message(STATUS " - ${_component} not found.") + endif () +endmacro() - find_library(AVFORMAT_LIBRARIES NAMES avformat +# +### Macro: find_component +# +# Checks for the given component by invoking pkgconfig and then looking up the libraries and +# include directories. +# +macro(find_component _component _pkgconfig _library _header) + + if (NOT WIN32) + # use pkg-config to get the directories and then use these values + # in the FIND_PATH() and FIND_LIBRARY() calls + find_package(PkgConfig) + if (PKG_CONFIG_FOUND) + pkg_check_modules(PC_${_component} ${_pkgconfig}) + endif () + endif (NOT WIN32) + + find_path(${_component}_INCLUDE_DIRS ${_header} HINTS - ${PC_LIBAVCODEC_LIBDIR} - ${PC_LIBAVCODEC_LIBRARY_DIRS} + ${PC_LIB${_component}_INCLUDEDIR} + ${PC_LIB${_component}_INCLUDE_DIRS} + PATH_SUFFIXES + ffmpeg ) - find_library(AVUTIL_LIBRARIES NAMES avutil - HINTS - ${PC_LIBAVCODEC_LIBDIR} - ${PC_LIBAVCODEC_LIBRARY_DIRS} + find_library(${_component}_LIBRARIES NAMES ${_library} + HINTS + ${PC_LIB${_component}_LIBDIR} + ${PC_LIB${_component}_LIBRARY_DIRS} ) - - - set(FFMPEG_LIBRARIES ) - if (AVCODEC_LIBRARIES) - set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${AVCODEC_LIBRARIES}) - endif (AVCODEC_LIBRARIES) - - if (AVFORMAT_LIBRARIES) - set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${AVFORMAT_LIBRARIES}) - endif (AVFORMAT_LIBRARIES) - - if (AVUTIL_LIBRARIES) - set(FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${AVUTIL_LIBRARIES}) - endif (AVUTIL_LIBRARIES) - - if (FFMPEG_LIBRARIES AND FFMPEG_INCLUDE_DIR) - set(FFMPEG_FOUND TRUE) - endif (FFMPEG_LIBRARIES AND FFMPEG_INCLUDE_DIR) - - if (FFMPEG_FOUND) - if (NOT FFmpeg_FIND_QUIETLY) - message(STATUS "Found FFMPEG: ${FFMPEG_LIBRARIES} ${FFMPEG_INCLUDE_DIR}") - endif (NOT FFmpeg_FIND_QUIETLY) - else (FFMPEG_FOUND) - # only an old libavcodec was found ? - if (FFMPEG_INCLUDE_DIR_OLD_STYLE AND NOT FFMPEG_INCLUDE_DIR AND NOT FFmpeg_FIND_QUIETLY) - message(STATUS "Found old version of libavcodec, but a newer version is required.") - endif (FFMPEG_INCLUDE_DIR_OLD_STYLE AND NOT FFMPEG_INCLUDE_DIR AND NOT FFmpeg_FIND_QUIETLY) - - if (FFmpeg_FIND_REQUIRED) - message(FATAL_ERROR "Could NOT find FFMPEG") - else (FFmpeg_FIND_REQUIRED) - if (NOT FFmpeg_FIND_QUIETLY) - message(STATUS "Could NOT find FFMPEG") - endif (NOT FFmpeg_FIND_QUIETLY) - endif (FFmpeg_FIND_REQUIRED) - endif (FFMPEG_FOUND) - - mark_as_advanced(AVCODEC_LIBRARIES - AVFORMAT_LIBRARIES - AVUTIL_LIBRARIES - FFMPEG_INCLUDE_DIR - FFMPEG_INCLUDE_DIR_OLD_STYLE) - -endif (FFMPEG_LIBRARIES)# AND FFMPEG_DEFINITIONS) + set(${_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(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(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 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 ${FFMPEG_DEFINITIONS} CACHE STRING "The FFmpeg cflags." FORCE) + + mark_as_advanced(FFMPEG_INCLUDE_DIRS + FFMPEG_LIBRARIES + FFMPEG_DEFINITIONS) + +endif () + +# Now set the noncached _FOUND vars for the components. +foreach (_component AVCODEC AVDEVICE AVFORMAT AVUTIL POSTPROCESS SWSCALE) + set_component_found(${_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}) _______________________________________________ Kde-buildsystem mailing list [email protected] https://mail.kde.org/mailman/listinfo/kde-buildsystem
