Add V4L support when building with CMake.

CMakeLists.txt

@@ -78,6 +78,7 @@ option(ENABLE_VIDEO "Build mediastreamer2 with video support." YES)
 cmake_dependent_option(ENABLE_FFMPEG "Build mediastreamer2 with ffmpeg video support." YES "ENABLE_VIDEO" NO)
 cmake_dependent_option(ENABLE_GLX "Enable X11+OpenGL rendering support (requires glx and glew)." ${ENABLE_GLX_DEFAULT_VALUE} "ENABLE_VIDEO;UNIX" NO)
 cmake_dependent_option(ENABLE_SDL "Enable SDL support." NO "ENABLE_FFMPEG" NO)
+cmake_dependent_option(ENABLE_V4L "Enable Video4Linux support." YES "ENABLE_VIDEO;LINUX_OR_BSD" NO)
 cmake_dependent_option(ENABLE_X11 "Enable X11 support." ${ENABLE_X11_DEFAULT_VALUE} "ENABLE_FFMPEG;UNIX" NO)
 cmake_dependent_option(ENABLE_XV "Enable XV support." ${ENABLE_X11_DEFAULT_VALUE} "ENABLE_FFMPEG;UNIX" NO)
 cmake_dependent_option(ENABLE_THEORA "Enable theora video codec support." YES "ENABLE_VIDEO" NO)
@@ -180,6 +181,12 @@ if(ENABLE_FFMPEG)
 else()
 	add_definitions(-DNO_FFMPEG)
 endif()
+if(ENABLE_V4L)
+	find_package(V4L)
+	if(NOT V4L_FOUND)
+		message(FATAL_ERROR "Missing V4L. It is highly recommended to build with libv4l2 headers and library. Many camera will won't work or will crash your application if libv4l2 is not installed. If you know what you are doing, you can use -DENABLE_V4L=0 to disable this check.")
+	endif()
+endif()
 if(ENABLE_X11)
 	find_package(X11)
 	if(NOT X11_FOUND)
@@ -254,6 +261,9 @@ endif()
 if(FFMPEG_FOUND)
 	include_directories(${FFMPEG_INCLUDE_DIRS})
 endif()
+if(V4L_FOUND)
+	include_directories(${V4L_INCLUDE_DIRS})
+endif()
 if(X11_FOUND)
 	include_directories(${X11_INCLUDE_DIRS})
 endif()

cmake/FindV4L.cmake

+############################################################################
+# FindV4L.txt
+# Copyright (C) 2014  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+############################################################################
+#
+# - Find the V4L include file and library
+#
+#  V4L_FOUND - system has V4L
+#  V4L_INCLUDE_DIRS - the V4L include directory
+#  V4L_LIBRARIES - The libraries needed to use V4L
+
+set(_V4L_ROOT_PATHS
+	${WITH_V4L}
+	${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()
+
+find_library(V4L1_LIBRARIES
+	NAMES v4l1
+	HINTS _V4L_ROOT_PATHS
+	PATH_SUFFIXES bin lib
+)
+find_library(V4L2_LIBRARIES
+	NAMES v4l2
+	HINTS _V4L_ROOT_PATHS
+	PATH_SUFFIXES bin lib
+)
+find_library(V4LCONVERT_LIBRARIES
+	NAMES v4lconvert
+	HINTS _V4L_ROOT_PATHS
+	PATH_SUFFIXES bin lib
+)
+
+set(V4L_INCLUDE_DIRS )
+if(V4L1_INCLUDE_DIRS})
+	list(APPEND V4L_INCLUDE_DIRS ${V4L1_INCLUDE_DIRS})
+endif()
+if(V4L2_INCLUDE_DIRS)
+	list(APPEND V4L_INCLUDE_DIRS ${V4L2_INCLUDE_DIRS})
+endif()
+set(V4L_LIBRARIES )
+if(V4L1_LIBRARIES)
+	list(APPEND V4L_LIBRARIES ${V4L1_LIBRARIES})
+endif()
+if(V4L2_LIBRARIES)
+	list(APPEND V4L_LIBRARIES ${V4L2_LIBRARIES})
+endif()
+if(V4LCONVERT_LIBRARIES)
+	list(APPEND V4L_LIBRARIES ${V4LCONVERT_LIBRARIES})
+endif()
+list(REMOVE_DUPLICATES V4L_INCLUDE_DIRS)
+list(REMOVE_DUPLICATES V4L_LIBRARIES)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(V4L
+	DEFAULT_MSG
+	V4L_INCLUDE_DIRS V4L_LIBRARIES
+)
+
+mark_as_advanced(V4L_INCLUDE_DIRS V4L_LIBRARIES)

src/CMakeLists.txt

@@ -259,6 +259,14 @@ if(ENABLE_VIDEO)
 	if(THEORA_FOUND)
 		list(APPEND VOIP_SOURCE_FILES videofilters/theora.c)
 	endif()
+	if(V4L_FOUND)
+		if(HAVE_LINUX_VIDEODEV_H)
+			list(APPEND VOIP_SOURCE_FILES videofilters/msv4l.c)
+		endif()
+		if(HAVE_LINUX_VIDEODEV2_H)
+			list(APPEND VOIP_SOURCE_FILES videofilters/msv4l2.c)
+		endif()
+	endif()
 	if(VPX_FOUND)
 		list(APPEND VOIP_SOURCE_FILES
 			videofilters/vp8.c
@@ -305,7 +313,7 @@ add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/yuv2rgb.vs.h
 		-DINPUT_DIR=${CMAKE_CURRENT_SOURCE_DIR} -DOUTPUT_DIR=${CMAKE_CURRENT_BINARY_DIR}
 		-DSOURCE_FILE="yuv2rgb.vs"
 		-P ${CMAKE_CURRENT_SOURCE_DIR}/generate_yuv2rgb_header.cmake)
-endif(UNIX)
+endif()
 set_source_files_properties(${VOIP_GENERATED_SOURCE_FILES} PROPERTIES GENERATED TRUE)
 
 
@@ -357,6 +365,9 @@ if(FFMPEG_FOUND)
 		add_definitions(-Dinline=__inline)
 	endif()
 endif()
+if(V4L_FOUND)
+	list(APPEND VOIP_LIBS ${V4L_LIBRARIES})
+endif()
 if(X11_FOUND)
 	list(APPEND VOIP_LIBS ${X11_LIBRARIES})
 endif()