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Last active July 1, 2021 04:38
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FindFFmpeg.cmake
# ==================================================================================================================== #
# Prepare #
# - include dir: $HOME/ffmpeg_build/include #
# - library dir: $HOME/ffmpeg_build/lib #
# - binary dir: $HOME/ffmpeg_build/bin #
# ==================================================================================================================== #
# ==================================================================================================================== #
# Linux FFmpeg installation:
# ```
# # Install dependencies with apt:
# # sudo apt install nasm libass-dev libfdk-aac-dev libmp3lame-dev libopus-dev libvorbis-dev libvpx-dev libx264-dev libx265-dev;
#
# Install dependiencies with pacman:
# # sudo pacman -S nasm libass libfdk-aac lame opus libvorbis libvpx libx264 x265;
#
# cd ffmpeg &&\
# PATH="$HOME/ffmpeg_build/bin:$PATH" \
# PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" \
# ./configure \
# --prefix="$HOME/ffmpeg_build" \
# --extra-cflags="-I$HOME/ffmpeg_build/include" \
# --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
# --extra-libs="-lpthread -lm" \
# --bindir="$HOME/ffmpeg_build/bin" \
# --disable-static \
# --enable-shared \
# --enable-gpl \
# --enable-libass \
# --enable-libfdk-aac \
# --enable-libfreetype \
# --enable-libmp3lame \
# --enable-libopus \
# --enable-libvorbis \
# --enable-libvpx \
# --enable-libx264 \
# --enable-libx265 \
# --enable-nonfree && \
# PATH="$HOME/ffmpeg_build/bin:$PATH" make -j 8 && \
# make install
# ```
# ==================================================================================================================== #
# ==================================================================================================================== #
# MacOS X FFmpeg installation:
# ```
# # please install brew first !
# brew install automake fdk-aac git lame libass libtool libvorbis libvpx \
# opus sdl shtool texi2html theora wget x264 x265 xvid nasm &&
# cd ffmpeg &&\
# PATH="$HOME/ffmpeg_build/bin:$PATH" \
# PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" \
# pkg_config='pkg-config --static' \
# ./configure \
# --prefix="$HOME/ffmpeg_build" \
# --pkg-config-flags="--static" \
# --extra-cflags="-I$HOME/ffmpeg_build/include" \
# --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
# --extra-libs="-lpthread -lm" \
# --bindir="$HOME/ffmpeg_build/bin" \
# --cc=clang --host-cflags= --host-ldflags= \
# --enable-static --enable-shared --enable-pthreads \
# --enable-hardcoded-tables --enable-avresample \
# --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl \
# --enable-videotoolbox \
# --disable-lzma &&
# PATH="$HOME/ffmpeg_build/bin:$PATH" make -j 8 && \
# make install
# ```
# ==================================================================================================================== #
# ==================================================================================================================== #
# Windows FFmpeg installation:
# ```
# # first open a cmd (not powershell or something else !)
# # install VS2015 (VS2013 and later should be ok, but paths should be changed according to VS version)
# # install msys2 (64bit) at c:/
# # cmd -> cd c:/msys64
# # cmd -> "C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/amd64/vcvars64.bat"
# # cmd -> ./msys2_shell.cmd -mingw64
# # then, msys will open, all following cmds are typed in msys shell.
#
# export PATH="/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/BIN/amd64/":$PATH &&
# which link.exe && # should be `/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/BIN/amd64/link.exe`
# which cl.exe && # should be `/c/Program Files (x86)/Microsoft Visual Studio 14.0/VC/BIN/amd64/cl.exe`
# # if link.exe is not right, rename /usr/bin/link.exe to /usr/bin/link_backup.exe
#
# cd ffmpeg &&
# PATH="$HOME/ffmpeg_build/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
# --toolchain=msvc \
# --prefix="$HOME/ffmpeg_build" \
# --pkg-config-flags="--static" \
# --extra-cflags="-I$HOME/ffmpeg_build/include" \
# --extra-ldflags="-L$HOME/ffmpeg_build/lib" \
# --bindir="$HOME/ffmpeg_build/bin" \
# --arch=x86_64 --enable-yasm --enable-asm --enable-shared --enable-static && \
# PATH="$HOME/ffmpeg_build/bin:$PATH" make -j 8 && \
# make install
# # the ffmpeg_build should be in the msys home.
# ```
# ==================================================================================================================== #
# ==================================================================================================================== #
# Code of FindFFmpeg.cmake #
# ==================================================================================================================== #
# automaticly get installation path
if (NOT FFmpeg_INSTALL_PATH)
if (UNIX) # macos or Linux using Home
set(FFmpeg_INSTALL_PATH "$ENV{HOME}/ffmpeg_build")
else() # windows using msys2_shell -mingw64
set(FFmpeg_INSTALL_PATH "C:/msys64/home/admin/ffmpeg_build")
endif()
endif ()
# Find all components if not specificly asked
if (NOT FFmpeg_FIND_COMPONENTS)
set(FFmpeg_FIND_COMPONENTS AVCODEC AVFORMAT AVDEVICE AVUTIL AVFILTER SWSCALE SWRESAMPLE POSTPROC)
endif ()
# Function, to find component
function(_FFmpeg_find_component _component _library _header)
# find from path
find_path(FFmpeg_${_component}_INCLUDE_DIR
NAMES ${_header}
PATHS "${FFmpeg_INSTALL_PATH}/include"
NO_DEFAULT_PATH
NO_CMAKE_PATH
)
find_library(FFmpeg_${_component}_LIBRARY
NAMES ${_library}
PATHS "${FFmpeg_INSTALL_PATH}/lib"
NO_DEFAULT_PATH
NO_CMAKE_PATH
)
# if already found
if(TARGET FFmpeg::${_component})
return()
endif()
# Found
if (FFmpeg_${_component}_INCLUDE_DIR AND FFmpeg_${_component}_LIBRARY)
mark_as_advanced(FFmpeg_${_component}_INCLUDE_DIR FFmpeg_${_component}_LIBRARY)
add_library(FFmpeg::${_component} UNKNOWN IMPORTED)
set_target_properties(FFmpeg::${_component} PROPERTIES
IMPORTED_LOCATION "${FFmpeg_${_component}_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${FFmpeg_${_component}_INCLUDE_DIR}"
)
if (NOT FFmpeg_FIND_QUIETLY)
message(STATUS "Found FFmpeg::${_component}: ${FFmpeg_${_component}_INCLUDE_DIR} ${FFmpeg_${_component}_LIBRARY}")
endif ()
# Not Found
else ()
if (FFmpeg_FIND_REQUIRED)
message(SEND_ERROR "Can't find ${_component} in FFmpeg. Check that it's installed correctly and try again.")
endif ()
endif ()
endfunction()
# # TBALE of argments
# AVCODEC avcodec libavcodec/avcodec.h
# AVFORMAT avformat libavformat/avformat.h
# AVDEVICE avdevice libavdevice/avdevice.h
# AVUTIL avutil libavutil/avutil.h
# AVFILTER avfilter libavfilter/avfilter.h
# SWSCALE swscale libswscale/swscale.h
# SWRESAMPLE swresample libswresample/swresample.h
# POSTPROC postproc libpostproc/postprocess.h (special case!)
# loop each component
set(FFmpeg_INTERFACE_LINK_LIBRARY "")
foreach (_component ${FFmpeg_FIND_COMPONENTS})
string(TOLOWER ${_component} _tmp_lower)
set(_tmp_header lib${_tmp_lower}/${_tmp_lower}.h)
# special case
if (${_component} STREQUAL "POSTPROC")
set(_tmp_header lib${_tmp_lower}/postprocess.h)
endif ()
# find
_FFmpeg_find_component(${_component} ${_tmp_lower} ${_tmp_header})
list(APPEND FFmpeg_INTERFACE_LINK_LIBRARIES FFmpeg::${_component})
endforeach ()
# Interface FFmpeg::FFmpeg
if (NOT TARGET FFmpeg::FFmpeg)
add_library(FFmpeg::FFmpeg INTERFACE IMPORTED)
set_property(TARGET FFmpeg::FFmpeg PROPERTY
INTERFACE_LINK_LIBRARIES ${FFmpeg_INTERFACE_LINK_LIBRARIES}
)
endif ()
# TODO: how to copy dll on win32?
if (WIN32)
file(GLOB FFMPEG_WIN32_DLLS "${FFmpeg_INSTALL_PATH}/bin/*.dll" )
endif (WIN32)
macro (FFMPEG_COPY_DLL projectName)
if (WIN32)
foreach(THEDLL ${FFMPEG_WIN32_DLLS})
message(STATUS " |> Copy DLL: ${THEDLL}")
add_custom_command(TARGET ${projectName} POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different
${THEDLL} $<TARGET_FILE_DIR:${projectName}>) # source # target
endforeach(THEDLL ${SNOW_WIN32_DLLS})
endif (WIN32)
endmacro()
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