Revision control
++ # Copyright (C) 2026 The Qt Company Ltd.
++ # SPDX-License-Identifier: BSD-3-Clause
++
++
++ function(qt_internal_multimedia_get_ffmpeg_stub_libraries out_var)
++ set(result "")
++
++ set(stub_prefix "${QT_CMAKE_EXPORT_NAMESPACE}FFmpegStub-")
++ string(TOUPPER "${QT_CMAKE_EXPORT_NAMESPACE}" install_paths_prefix)
++
++ set(searched_dirs "")
++ if(${install_paths_prefix}_INSTALL_PREFIX AND ${install_paths_prefix}_INSTALL_LIBS)
++ list(APPEND searched_dirs
++ "${${install_paths_prefix}_INSTALL_PREFIX}/${${install_paths_prefix}_INSTALL_LIBS}")
++ endif()
++
++ if(CMAKE_CURRENT_FUNCTION_LIST_DIR)
++ get_filename_component(config_libdir "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/../.." ABSOLUTE)
++ if(NOT config_libdir IN_LIST searched_dirs)
++ list(APPEND searched_dirs "${config_libdir}")
++ endif()
++ endif()
++
++ if(QT_FEATURE_ffmpeg_stubs)
++ foreach(stub IN ITEMS ssl crypto va va-drm va-x11)
++ if(TARGET ${stub_prefix}${stub})
++ list(APPEND result ${stub_prefix}${stub})
++ endif()
++ endforeach()
++
++ if(NOT result)
++ foreach(dir IN LISTS searched_dirs)
++ file(GLOB stub_files "${dir}/lib${stub_prefix}*${CMAKE_SHARED_LIBRARY_SUFFIX}*")
++
++ foreach(stub_file IN LISTS stub_files)
++ get_filename_component(stub_file "${stub_file}" REALPATH)
++ if(NOT stub_file IN_LIST result)
++ list(APPEND result "${stub_file}")
++ endif()
++ endforeach()
++ endforeach()
++ endif()
++ endif()
++
++ set(${out_var} "${result}" PARENT_SCOPE)
++ endfunction()
++
++ function(qt_internal_multimedia_link_ffmpeg_stubs target)
++ qt_internal_multimedia_get_ffmpeg_stub_libraries(stub_libraries)
++
++ if(stub_libraries)
++ target_link_options(${target} PRIVATE "LINKER:--no-as-needed")
++ target_link_libraries(${target} PRIVATE ${stub_libraries})
++ elseif(QT_FEATURE_ffmpeg_stubs AND BUILD_SHARED_LIBS)
++ message(FATAL_ERROR
++ "FFmpeg is used with symbol stubs, but no stub library was found for "
++ "target ${target}. Linking it would fail with undefined references "
++ "into OpenSSL or VAAPI. Reconfigure with "
++ "-DQT_MULTIMEDIA_DEBUG_FFMPEG_STUBS=ON for details.")
++ endif()
++ endfunction()
++
++ function(qt_internal_multimedia_add_test name)
++ set(options
++ MACOS_BUNDLE # Add a macOS bundle target, requires Info.plist
++ NEEDS_MEDIA_BACKEND_PLUGINS # Add dependency to qt_plugins_qtmultimedia target
++ # IOS: Add ffmpeg libraries to the target
++ LINK_FFMPEG_STUBS # Required for executables linking Qt::FFmpegMediaPluginImplPrivate
++ GPU_DRIVER_SENSITIVE # Results depend on GPU driver features (e.g. hw decode, video
++ # processing); full coverage needs a physical GPU.
++ )
++ set(oneValueArgs)
++ set(multiValueArgs)
++ cmake_parse_arguments(PARSE_ARGV 1 args "${options}" "${oneValueArgs}" "${multiValueArgs}")
++
++ qt_internal_add_test(${name} ${args_UNPARSED_ARGUMENTS})
++
++ if(NOT TARGET ${name})
++ return()
++ endif()
++
++ if(args_MACOS_BUNDLE AND APPLE)
++ set_target_properties(${name} PROPERTIES
++ MACOSX_BUNDLE TRUE
++ MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/Info.plist
++ )
++ endif()
++
++ if(TEST ${name})
++ if(args_GPU_DRIVER_SENSITIVE)
++ set_property(TEST ${name}
++ APPEND PROPERTY
++ LABELS "gpu-driver-sensitive")
++ endif()
++ endif()
++
++ if(args_NEEDS_MEDIA_BACKEND_PLUGINS)
++ if(IOS)
++ qt_add_ios_ffmpeg_libraries(${name})
++ endif()
++
++ if(TARGET qt_plugins_qtmultimedia)
++ add_dependencies(${name} qt_plugins_qtmultimedia)
++ endif()
++ if(TEST ${name})
++ set_property(TEST ${name} APPEND PROPERTY LABELS "media-backend")
++ endif()
++ endif()
++
++ if(args_LINK_FFMPEG_STUBS)
++ qt_internal_multimedia_link_ffmpeg_stubs(${name})
++ endif()
++ endfunction()