From d67cb0d0dfc0fadfebf444feadb8000d2437bd74 Mon Sep 17 00:00:00 2001
From: Isaac Connor <iconnor@pseudo.connortechnology.com>
Date: Wed, 28 Sep 2016 09:14:44 -0400
Subject: [PATCH] add recipes to detect libv4l2

---
 cmake/Modules/FindV4L2.cmake | 67 ++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 cmake/Modules/FindV4L2.cmake

diff --git a/cmake/Modules/FindV4L2.cmake b/cmake/Modules/FindV4L2.cmake
new file mode 100644
index 000000000..4dae7f9a4
--- /dev/null
+++ b/cmake/Modules/FindV4L2.cmake
@@ -0,0 +1,67 @@
+# - Find V4L2 library
+# Find the native V4L2 includes and library
+# This module defines
+#  V4L2_INCLUDE_DIR, where to find libv4l2.h, etc.
+#  V4L2_LIBRARIES, libraries to link against to use V4L2.
+#  V4L2_FOUND, If false, do not try to use V4L2. also defined, but not for general use are
+#  V4L2_LIBRARY, where to find the V4L2 library.
+#
+#=============================================================================
+# Copyright 2012 Juergen Heinemann (Undefined) http://www.hjcms.de
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#
+#=============================================================================
+
+SET (V4L2_FOUND 0)
+
+FIND_PATH (V4L2_INCLUDE_DIR
+  NAMES libv4l2.h
+  PATH_SUFFIXES v4l2 video4linux
+  DOC "The Video4Linux Version 2 (v4l2) include directory"
+)
+
+FIND_PATH (V4L2_CONVERT_INCLUDE_DIR
+  NAMES libv4lconvert.h
+  PATH_SUFFIXES v4l2 v4lconvert
+  DOC "The v4l format conversion (v4lconvert) include directory"
+)
+
+FIND_PATH (_videodev2
+  NAMES videodev2.h
+  PATH_SUFFIXES linux
+  DOC "Video for Linux Two header file include directory"
+)
+
+FIND_LIBRARY (V4L2_LIBRARY
+  NAMES v4l2
+  DOC "The Video4Linux Version 2 (v4l2) library"
+)
+
+FIND_LIBRARY (V4L2_CONVERT_LIBRARY
+  NAMES v4lconvert
+  DOC "The v4l format conversion (v4lconvert) library"
+)
+
+# handle the QUIETLY and REQUIRED arguments and set V4L2_FOUND to TRUE if all listed variables are TRUE
+INCLUDE (FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS (V4L2 DEFAULT_MSG 
+  V4L2_LIBRARY V4L2_CONVERT_LIBRARY V4L2_INCLUDE_DIR V4L2_CONVERT_INCLUDE_DIR)
+
+IF (NOT V4L2_FOUND)
+  MESSAGE (WARNING "libv4l2 or libv4lconvert libraries from http://linuxtv.org not found!")
+ENDIF (NOT V4L2_FOUND)
+
+IF (NOT _videodev2)
+  MESSAGE (WARNING "videodev2.h kernel header not found!")
+  SET (V4L2_FOUND 0)
+ENDIF(NOT _videodev2)
+
+MARK_AS_ADVANCED (V4L2_INCLUDE_DIR V4L2_CONVERT_INCLUDE_DIR V4L2_LIBRARY V4L2_CONVERT_LIBRARY)
+
+##EOF