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#############################################################################
#
# ViSP, open source Visual Servoing Platform software.
# Copyright (C) 2005 - 2025 by Inria. All rights reserved.
#
# This software 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.
# See the file LICENSE.txt at the root directory of this source
# distribution for additional information about the GNU GPL.
#
# For using ViSP with software that can not be combined with the GNU
# GPL, please contact Inria about acquiring a ViSP Professional
# Edition License.
#
# See https://visp.inria.fr for more information.
#
# This software was developed at:
# Inria Rennes - Bretagne Atlantique
# Campus Universitaire de Beaulieu
# 35042 Rennes Cedex
# France
#
# If you have questions regarding the use of this file, please contact
# Inria at visp@inria.fr
#
# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# Description:
# Try to find linux/videodev.h for Video For Linux Two framegrabbing
# capabilities.
# Once run this will define:
#
# V4L2_FOUND
# V4L2_INCLUDE_DIRS
# V4L2_LIBRARIES
# V4L2_VERSION
#
#############################################################################
if(NOT UNIX)
# MESSAGE("FindV4L2.cmake: only available for Unix.")
set(V4L2_FOUND FALSE)
else(NOT UNIX)
find_path(V4L2_INCLUDE_VIDEODEV2 linux/videodev2.h
$ENV{V4L2_HOME}/include
$ENV{V4L2_DIR}/include
/usr/include
/usr/local/include
/usr/src/linux/include
)
#MESSAGE("DBG V4L2_INCLUDE_VIDEODEV2=${V4L2_INCLUDE_VIDEODEV2}")
find_path(V4L2_INCLUDE_LIBV4L2 libv4l2.h
$ENV{V4L2_HOME}/include
$ENV{V4L2_DIR}/include
/usr/include
/usr/local/include
)
#MESSAGE("DBG V4L2_INCLUDE_LIBV4L2=${V4L2_INCLUDE_LIBV4L2}")
find_library(V4L2_LIBRARY_LIBV4L2
NAMES v4l2
PATHS
$ENV{V4L2_HOME}/lib
$ENV{V4L2_DIR}/lib
/usr/lib
/usr/local/lib
)
find_library(V4L2_LIBRARY_LIBV4LCONVERT
NAMES v4lconvert
PATHS
$ENV{V4L2_HOME}/lib
$ENV{V4L2_DIR}/lib
/usr/lib
/usr/local/lib
)
## --------------------------------
if(V4L2_INCLUDE_VIDEODEV2 AND V4L2_INCLUDE_LIBV4L2 AND V4L2_LIBRARY_LIBV4L2 AND V4L2_LIBRARY_LIBV4LCONVERT)
set(V4L2_INCLUDE_DIRS ${V4L2_INCLUDE_VIDEODEV2} ${V4L2_INCLUDE_LIBV4L2})
set(V4L2_LIBRARIES ${V4L2_LIBRARY_LIBV4L2} ${V4L2_LIBRARY_LIBV4LCONVERT})
set(V4L2_FOUND TRUE)
get_filename_component(V4L2_LIB_DIR ${V4L2_LIBRARY_LIBV4L2} PATH)
vp_get_version_from_pkg("libv4l2" "${V4L2_LIB_DIR}/pkgconfig" V4L2_VERSION)
else()
set(V4L2_FOUND FALSE)
endif()
mark_as_advanced(
V4L2_INCLUDE_DIRS
V4L2_INCLUDE_VIDEODEV2
V4L2_INCLUDE_LIBV4L2
V4L2_LIBRARY_LIBV4L2
V4L2_LIBRARY_LIBV4LCONVERT
)
endif()
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