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openrw/cmake/modules/FindFFmpeg.cmake
Paul Cercueil 6ab92da5b0 cmake: FFmpeg: Fix regex for version detection
Fix regex to detect the "4.2.2-1+b1" version currently available on
Debian testing.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
2020-03-16 22:32:33 +01:00

102 lines
3.0 KiB
CMake

# - Try to find ffmpeg libraries (libavcodec, libavformat and libavutil)
# Once done this will define
#
# FFMPEG_FOUND - system has ffmpeg or libav
# FFMPEG_INCLUDE_DIR - the ffmpeg include directory
# FFMPEG_LIBRARIES - Link these to use ffmpeg
# FFMPEG_LIBAVCODEC
# FFMPEG_LIBAVFORMAT
# FFMPEG_LIBAVUTIL
# FFMPEG_SWRESAMPLE
#
# Copyright (c) 2008 Andreas Schneider <mail@cynapses.org>
# Modified for other libraries by Lasse Kärkkäinen <tronic>
# Modified for Hedgewars by Stepik777
#
# Redistribution and use is allowed according to the terms of the New
# BSD license.
#
# 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(PKG_CONFIG_FOUND)
pkg_check_modules(_FFMPEG_AVCODEC libavcodec QUIET)
pkg_check_modules(_FFMPEG_AVFORMAT libavformat QUIET)
pkg_check_modules(_FFMPEG_AVUTIL libavutil QUIET)
pkg_check_modules(_FFMPEG_SWRESAMPLE libswresample QUIET)
endif()
find_path(FFMPEG_AVCODEC_INCLUDE_DIR
NAMES libavcodec/avcodec.h
PATHS ${_FFMPEG_AVCODEC_INCLUDE_DIRS} /usr/include /usr/local/include /opt/local/include /sw/include
PATH_SUFFIXES ffmpeg libav
)
find_library(FFMPEG_LIBAVCODEC
NAMES avcodec
PATHS ${_FFMPEG_AVCODEC_LIBRARY_DIRS} /usr/lib /usr/local/lib /opt/local/lib /sw/lib
)
find_library(FFMPEG_LIBAVFORMAT
NAMES avformat
PATHS ${_FFMPEG_AVFORMAT_LIBRARY_DIRS} /usr/lib /usr/local/lib /opt/local/lib /sw/lib
)
find_library(FFMPEG_LIBAVUTIL
NAMES avutil
PATHS ${_FFMPEG_AVUTIL_LIBRARY_DIRS} /usr/lib /usr/local/lib /opt/local/lib /sw/lib
)
find_library(FFMPEG_SWRESAMPLE
NAMES swresample
PATHS ${_FFMPEG_SWRESAMPLE_LIBRARY_DIRS} /usr/lib /usr/local/lib /opt/local/lib /sw/lib
)
set(FFMPEG_INCLUDE_DIR ${FFMPEG_AVCODEC_INCLUDE_DIR})
set(FFMPEG_LIBRARIES
${FFMPEG_LIBAVCODEC}
${FFMPEG_LIBAVFORMAT}
${FFMPEG_LIBAVUTIL}
${FFMPEG_SWRESAMPLE}
)
if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
list(APPEND FFMPEG_LIBRARIES secur32.lib Ws2_32.lib)
endif()
if(FFMPEG_INCLUDE_DIR)
file(READ "${FFMPEG_INCLUDE_DIR}/libavutil/ffversion.h" __FFVERSION_H)
string(REGEX MATCH "#define[ ]+FFMPEG_VERSION[ ]+\"([0-9a-zA-Z\\+\\.\\-]+)\"" _FFMPEG_VERSION "${__FFVERSION_H}")
if(NOT _FFMPEG_VERSION)
message(AUTHOR_WARNING "Cannot detect ffmpeg version: regex does not match")
endif()
set(FFMPEG_VERSION "${CMAKE_MATCH_1}")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(FFmpeg
FOUND_VAR FFMPEG_FOUND
REQUIRED_VARS FFMPEG_LIBAVCODEC FFMPEG_LIBAVFORMAT FFMPEG_LIBAVUTIL FFMPEG_SWRESAMPLE FFMPEG_INCLUDE_DIR
VERSION_VAR FFMPEG_VERSION
)
set(FFMPEG_FOUND "${FFmpeg_FOUND}")
find_package(Threads REQUIRED)
if(FFMPEG_FOUND)
add_library(ffmpeg INTERFACE)
target_link_libraries(ffmpeg
INTERFACE
${FFMPEG_LIBRARIES}
Threads::Threads
)
target_include_directories(ffmpeg SYSTEM
INTERFACE
"${FFMPEG_INCLUDE_DIR}"
)
add_library(ffmpeg::ffmpeg ALIAS ffmpeg)
endif()