diff --git a/cmake/FindV4L.cmake b/cmake/FindV4L.cmake new file mode 100644 index 000000000..da1bb203e --- /dev/null +++ b/cmake/FindV4L.cmake @@ -0,0 +1,122 @@ +############################################################################ +# FindV4L.cmake +# Copyright (C) 2014-2023 Belledonne Communications, Grenoble France +# +############################################################################ +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +# +############################################################################ +# +# Find the v4l library. +# +# Targets +# ^^^^^^^ +# +# The following targets may be defined: +# +# v4l1 - If the v4l1 library has been found +# v4l2 - If the v4l2 library has been found +# v4lconvert - If the v4lconvert library has been found +# +# +# Result variables +# ^^^^^^^^^^^^^^^^ +# +# This module will set the following variables in your project: +# +# V4L_FOUND - The v4l library has been found +# V4L_TARGETS - The list of the names of the CMake targets for the v4l libraries +# V4L_TARGET - The name of the CMake target for the v4l library +# V4L_convert_TARGET - The name of the CMake target for the v4lconvert library +# HAVE_LINUX_VIDEODEV_H - If the v4l library provides the linux/videodev.h header file +# HAVE_LINUX_VIDEODEV2_H - If the v4l library provides the linux/videodev2.h header file + + +set(_V4L_REQUIRED_VARS V4L_TARGETS V4L_TARGET V4L_convert_TARGET) +set(_V4L_CACHE_VARS ${_V4L_REQUIRED_VARS} HAVE_LINUX_VIDEODEV_H HAVE_LINUX_VIDEODEV2_H) + +set(_V4L_ROOT_PATHS ${CMAKE_INSTALL_PREFIX}) + +find_path(_V4L1_INCLUDE_DIRS + NAMES linux/videodev.h + HINTS _V4L_ROOT_PATHS + PATH_SUFFIXES include +) +if(_V4L1_INCLUDE_DIRS) + set(HAVE_LINUX_VIDEODEV_H 1) +endif() +find_path(_V4L2_INCLUDE_DIRS + NAMES linux/videodev2.h + HINTS _V4L_ROOT_PATHS + PATH_SUFFIXES include +) +if(_V4L2_INCLUDE_DIRS) + set(HAVE_LINUX_VIDEODEV2_H 1) +endif() + +if(_V4L1_INCLUDE_DIRS OR _V4L2_INCLUDE_DIRS) + find_library(_V4L1_LIBRARY + NAMES v4l1 + HINTS _V4L_ROOT_PATHS + PATH_SUFFIXES bin lib + ) + find_library(_V4L2_LIBRARY + NAMES v4l2 + HINTS _V4L_ROOT_PATHS + PATH_SUFFIXES bin lib + ) + find_library(_V4LCONVERT_LIBRARY + NAMES v4lconvert + HINTS _V4L_ROOT_PATHS + PATH_SUFFIXES bin lib + ) +endif() + +if(_V4L1_LIBRARY OR _V4L2_LIBRARY OR _V4LCONVERT_LIBRARY) + set(V4L_TARGETS ) + if(_V4L2_LIBRARY) + add_library(v4l2 UNKNOWN IMPORTED) + set_target_properties(v4l2 PROPERTIES + INTERFACE_INCLUDE_DIRECTORIES "${_V4L2_INCLUDE_DIRS}" + IMPORTED_LOCATION "${_V4L2_LIBRARY}" + ) + set(V4L_TARGET v4l2) + list(APPEND V4L_TARGETS v4l2) + set(_V4L_INCLUDE_DIRS "${_V4L2_INCLUDE_DIRS}") + elseif(_V4L1_LIBRARY) + add_library(v4l1 UNKNOWN IMPORTED) + set_target_properties(v4l1 PROPERTIES + INTERFACE_INCLUDE_DIRECTORIES "${_V4L1_INCLUDE_DIRS}" + IMPORTED_LOCATION "${_V4L1_LIBRARY}" + ) + set(V4L_TARGET v4l1) + list(APPEND V4L_TARGETS v4l1) + set(_V4L_INCLUDE_DIRS "${_V4L1_INCLUDE_DIRS}") + endif() + if(_V4LCONVERT_LIBRARY) + add_library(v4lconvert UNKNOWN IMPORTED) + set_target_properties(v4lconvert PROPERTIES + INTERFACE_INCLUDE_DIRECTORIES "${_V4L_INCLUDE_DIRS}" + IMPORTED_LOCATION "${_V4LCONVERT_LIBRARY}" + ) + set(V4L_convert_TARGET v4lconvert) + list(APPEND V4L_TARGETS v4lconvert) + endif() +endif() + +include(FindPackageHandleStandardArgs) +find_package_handle_standard_args(V4L REQUIRED_VARS ${_V4L_REQUIRED_VARS}) +mark_as_advanced(${_V4L_CACHE_VARS})