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Diffstat (limited to 'cmake/FindGStreamer.cmake')
| -rw-r--r-- | cmake/FindGStreamer.cmake | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/cmake/FindGStreamer.cmake b/cmake/FindGStreamer.cmake new file mode 100644 index 000000000..b8891e7ed --- /dev/null +++ b/cmake/FindGStreamer.cmake @@ -0,0 +1,154 @@ +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: BSD-3-Clause + +# FindGStreamer +# --------- +# +# Locate the gstreamer-1.0 library and some of its plugins. +# Defines the following imported target: +# +# ``GStreamer::GStreamer`` +# If the gstreamer-1.0 library is available and target GStreamer::Base, +# GStreamer::Audio, GStreamer::Video, GStreamer::Pbutils and +# GStreamer::Allocators exist +# +# If target GStreamer::GStreamer exists, the following targets may be defined: +# +# ``GStreamer::App`` +# If the gstapp-1.0 library is available and target GStreamer::GStreamer exists +# ``GStreamer::Photography`` +# If the gstphotography-1.0 library is available and target GStreamer::GStreamer exists +# ``GStreamer::Gl`` +# If the gstgl-1.0 library is available and target GStreamer::GStreamer exists +# + +include(CMakeFindDependencyMacro) +find_dependency(GObject) + +find_package(PkgConfig QUIET) +function(find_gstreamer_component component prefix header library) + if(NOT TARGET GStreamer::${component}) + string(TOUPPER ${component} upper) + pkg_check_modules(PC_GSTREAMER_${upper} ${prefix} IMPORTED_TARGET) + if(TARGET PkgConfig::PC_GSTREAMER_${upper}) + add_library(GStreamer::${component} INTERFACE IMPORTED) + target_link_libraries(GStreamer::${component} INTERFACE PkgConfig::PC_GSTREAMER_${upper}) + else() + find_path(GStreamer_${component}_INCLUDE_DIR + NAMES ${header} + PATH_SUFFIXES gstreamer-1.0 + ) + find_library(GStreamer_${component}_LIBRARY + NAMES ${library} + ) + if(${component} STREQUAL "Gl") + # search the gstglconfig.h include dir under the same root where the library is found + get_filename_component(gstglLibDir "${GStreamer_Gl_LIBRARY}" PATH) + find_path(GStreamer_GlConfig_INCLUDE_DIR + NAMES gst/gl/gstglconfig.h + PATH_SUFFIXES gstreamer-1.0/include + HINTS ${PC_GSTREAMER_GL_INCLUDE_DIRS} ${PC_GSTREAMER_GL_INCLUDEDIR} "${gstglLibDir}" + ) + if(GStreamer_GlConfig_INCLUDE_DIR) + list(APPEND GStreamer_Gl_INCLUDE_DIR "${GStreamer_GlConfig_INCLUDE_DIR}") + list(REMOVE_DUPLICATES GStreamer_Gl_INCLUDE_DIR) + endif() + endif() + if(GStreamer_${component}_LIBRARY AND GStreamer_${component}_INCLUDE_DIR) + add_library(GStreamer::${component} INTERFACE IMPORTED) + target_include_directories(GStreamer::${component} INTERFACE ${GStreamer_${component}_INCLUDE_DIR}) + target_link_libraries(GStreamer::${component} INTERFACE ${GStreamer_${component}_LIBRARY}) + endif() + mark_as_advanced(GStreamer_${component}_INCLUDE_DIR GStreamer_${component}_LIBRARY) + endif() + endif() + + if(TARGET GStreamer::${component}) + set(GStreamer_${component}_FOUND TRUE PARENT_SCOPE) + endif() +endfunction() + +# GStreamer required dependencies +find_gstreamer_component(Core gstreamer-1.0 gst/gst.h gstreamer-1.0) +find_gstreamer_component(Base gstreamer-base-1.0 gst/gst.h gstbase-1.0) +find_gstreamer_component(Audio gstreamer-audio-1.0 gst/audio/audio.h gstaudio-1.0) +find_gstreamer_component(Video gstreamer-video-1.0 gst/video/video.h gstvideo-1.0) +find_gstreamer_component(Pbutils gstreamer-pbutils-1.0 gst/pbutils/pbutils.h gstpbutils-1.0) +find_gstreamer_component(Allocators gstreamer-allocators-1.0 gst/allocators/allocators.h gstallocators-1.0) + +if(TARGET GStreamer::Core) + target_link_libraries(GStreamer::Core INTERFACE GObject::GObject) +endif() +if(TARGET GStreamer::Base AND TARGET GStreamer::Core) + target_link_libraries(GStreamer::Base INTERFACE GStreamer::Core) +endif() +if(TARGET GStreamer::Audio AND TARGET GStreamer::Base) + target_link_libraries(GStreamer::Audio INTERFACE GStreamer::Base) +endif() +if(TARGET GStreamer::Video AND TARGET GStreamer::Base) + target_link_libraries(GStreamer::Video INTERFACE GStreamer::Base) +endif() +if(TARGET GStreamer::Pbutils AND TARGET GStreamer::Audio AND TARGET GStreamer::Video) + target_link_libraries(GStreamer::Pbutils INTERFACE GStreamer::Audio GStreamer::Video) +endif() +if(TARGET GStreamer::Allocators AND TARGET GStreamer::Core) + target_link_libraries(GStreamer::Allocators INTERFACE GStreamer::Core) +endif() + +# GStreamer optional components +foreach(component ${GStreamer_FIND_COMPONENTS}) + if(${component} STREQUAL "App") + find_gstreamer_component(App gstreamer-app-1.0 gst/app/gstappsink.h gstapp-1.0) + if(TARGET GStreamer::App AND TARGET GStreamer::Base) + target_link_libraries(GStreamer::App INTERFACE GStreamer::Base) + endif() + elseif(${component} STREQUAL "Photography") + find_gstreamer_component(Photography gstreamer-photography-1.0 gst/interfaces/photography.h gstphotography-1.0) + if(TARGET GStreamer::Photography AND TARGET GStreamer::Core) + target_link_libraries(GStreamer::Photography INTERFACE GStreamer::Core) + endif() + elseif(${component} STREQUAL "Gl") + find_gstreamer_component(Gl gstreamer-gl-1.0 gst/gl/gl.h gstgl-1.0) + if(TARGET GStreamer::Gl AND TARGET GStreamer::Video AND TARGET GStreamer::Allocators) + target_link_libraries(GStreamer::Gl INTERFACE GStreamer::Video GStreamer::Allocators) + endif() + else() + message(WARNING "FindGStreamer.cmake: Invalid Gstreamer component \"${component}\" requested") + endif() +endforeach() + +# Create target GStreamer::GStreamer +include(FindPackageHandleStandardArgs) +find_package_handle_standard_args(GStreamer + REQUIRED_VARS + GStreamer_Core_FOUND + GStreamer_Base_FOUND + GStreamer_Audio_FOUND + GStreamer_Video_FOUND + GStreamer_Pbutils_FOUND + GStreamer_Allocators_FOUND + HANDLE_COMPONENTS +) + +if(GStreamer_FOUND AND NOT TARGET GStreamer::GStreamer) + add_library(GStreamer::GStreamer INTERFACE IMPORTED) + target_link_libraries(GStreamer::GStreamer INTERFACE + GStreamer::Core + GStreamer::Base + GStreamer::Audio + GStreamer::Video + GStreamer::Pbutils + GStreamer::Allocators + ) +endif() + +if(TARGET PkgConfig::PC_GSTREAMER_GL) + get_target_property(_qt_incs PkgConfig::PC_GSTREAMER_GL INTERFACE_INCLUDE_DIRECTORIES) + set(__qt_fixed_incs) + foreach(path IN LISTS _qt_incs) + if(IS_DIRECTORY "${path}") + list(APPEND __qt_fixed_incs "${path}") + endif() + endforeach() + set_property(TARGET PkgConfig::PC_GSTREAMER_GL PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${__qt_fixed_incs}") +endif() |