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cmake: try system ffmpeg first #78

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cmake: try system ffmpeg first #78

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73 changes: 37 additions & 36 deletions 3rdparty/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -33,46 +33,47 @@ endif()

add_subdirectory(LibAtrac9)

set(FFMPEG_PATH ${CMAKE_CURRENT_SOURCE_DIR}/FFmpeg)
add_custom_command(
OUTPUT ${FFMPEG_PATH}/config.h
COMMAND ./configure
COMMENT "Configuring FFmpeg..."
WORKING_DIRECTORY ${FFMPEG_PATH}
)
add_custom_target(ffmpeg-configure DEPENDS ${FFMPEG_PATH}/config.h)

function(import_ffmpeg_library name)
if (${CMAKE_GENERATOR} STREQUAL "Unix Makefiles")
set(MAKE_COMMAND $(MAKE) -j$(nproc))
elseif (${CMAKE_GENERATOR} STREQUAL "Ninja")
set(MAKE_COMMAND make -j$$(nproc))
else()
set(MAKE_COMMAND make)
endif()

if(NOT ffmpeg_FOUND)
set(FFMPEG_PATH ${CMAKE_CURRENT_SOURCE_DIR}/FFmpeg)
add_custom_command(
OUTPUT "${FFMPEG_PATH}/lib${name}/lib${name}.a"
COMMAND ${MAKE_COMMAND} -C ${FFMPEG_PATH} "lib${name}/lib${name}.a"
COMMENT "Building lib${name}/lib${name}.a"
DEPENDS ffmpeg-configure
OUTPUT ${FFMPEG_PATH}/config.h
COMMAND ./configure
COMMENT "Configuring FFmpeg..."
WORKING_DIRECTORY ${FFMPEG_PATH}
)
add_custom_target(ffmpeg-configure DEPENDS ${FFMPEG_PATH}/config.h)

add_custom_target(ffmpeg-build-${name} DEPENDS "${FFMPEG_PATH}/lib${name}/lib${name}.a")
function(import_ffmpeg_library name)
if (${CMAKE_GENERATOR} STREQUAL "Unix Makefiles")
set(MAKE_COMMAND $(MAKE) -j$(nproc))
elseif (${CMAKE_GENERATOR} STREQUAL "Ninja")
set(MAKE_COMMAND make -j$$(nproc))
else()
set(MAKE_COMMAND make)
endif()

add_library(ffmpeg::${name} STATIC IMPORTED GLOBAL)
set_property(TARGET ffmpeg::${name} PROPERTY IMPORTED_LOCATION "${FFMPEG_PATH}/lib${name}/lib${name}.a")
set_property(TARGET ffmpeg::${name} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_PATH}")
add_dependencies(ffmpeg::${name} ffmpeg-build-${name})
endfunction()
add_custom_command(
OUTPUT "${FFMPEG_PATH}/lib${name}/lib${name}.a"
COMMAND ${MAKE_COMMAND} -C ${FFMPEG_PATH} "lib${name}/lib${name}.a"
COMMENT "Building lib${name}/lib${name}.a"
DEPENDS ffmpeg-configure
WORKING_DIRECTORY ${FFMPEG_PATH}
)

import_ffmpeg_library(avcodec)
import_ffmpeg_library(avformat)
import_ffmpeg_library(avfilter)
import_ffmpeg_library(avdevice)
import_ffmpeg_library(avutil)
import_ffmpeg_library(swscale)
import_ffmpeg_library(swresample)
import_ffmpeg_library(postproc)
add_custom_target(ffmpeg-build-${name} DEPENDS "${FFMPEG_PATH}/lib${name}/lib${name}.a")

add_library(ffmpeg::${name} STATIC IMPORTED GLOBAL)
set_property(TARGET ffmpeg::${name} PROPERTY IMPORTED_LOCATION "${FFMPEG_PATH}/lib${name}/lib${name}.a")
set_property(TARGET ffmpeg::${name} PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${FFMPEG_PATH}")
add_dependencies(ffmpeg::${name} ffmpeg-build-${name})
endfunction()

import_ffmpeg_library(avcodec)
import_ffmpeg_library(avformat)
import_ffmpeg_library(avfilter)
import_ffmpeg_library(avdevice)
import_ffmpeg_library(avutil)
import_ffmpeg_library(swscale)
import_ffmpeg_library(swresample)
import_ffmpeg_library(postproc)
endif()
1 change: 1 addition & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ set(CMAKE_BUILD_RPATH_USE_ORIGIN on)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

find_package(ffmpeg 7.0.2 MODULE COMPONENTS avcodec avutil swresample)
find_package(nlohmann_json CONFIG)
add_subdirectory(3rdparty EXCLUDE_FROM_ALL)

Expand Down
29 changes: 29 additions & 0 deletions cmake/Findffmpeg.cmake
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Original file line number Diff line number Diff line change
@@ -0,0 +1,29 @@
if(NOT avutil IN_LIST ffmpeg_FIND_COMPONENTS)
list(APPEND ffmpeg_FIND_COMPONENTS avutil)
endif()

find_package(PkgConfig QUIET)
foreach(c IN LISTS ffmpeg_FIND_COMPONENTS)
pkg_search_module(ffmpeg_${c} QUIET IMPORTED_TARGET lib${c})
endforeach()

find_file(ffmpeg_VERSION_FILE libavutil/ffversion.h HINTS "${ffmpeg_avutil_INCLUDEDIR}")
if(ffmpeg_VERSION_FILE)
file(STRINGS "${ffmpeg_VERSION_FILE}" ffmpeg_VERSION_LINE REGEX "FFMPEG_VERSION")
string(REGEX MATCH "[0-9.]+" ffmpeg_VERSION "${ffmpeg_VERSION_LINE}")
unset(ffmpeg_VERSION_LINE)
unset(ffmpeg_VERSION_FILE)
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(ffmpeg
REQUIRED_VARS ffmpeg_avutil_LINK_LIBRARIES
VERSION_VAR ffmpeg_VERSION
HANDLE_COMPONENTS
)

foreach(c IN LISTS ffmpeg_FIND_COMPONENTS)
if(ffmpeg_FOUND AND ffmpeg_${c}_FOUND AND NOT TARGET ffmpeg::${c})
add_library(ffmpeg::${c} ALIAS PkgConfig::ffmpeg_${c})
endif()
endforeach()
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