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# - Try to find GStreamer
# Once done this will define
#
# GSTREAMER_FOUND - system has GStreamer
# GSTREAMER_INCLUDE_DIR - the GStreamer include directory
# GSTREAMER_LIBRARY - the main GStreamer library
# GSTREAMER_PLUGIN_DIR - the GStreamer plugin directory
#
# And for all the plugin libraries specified in the COMPONENTS
# of find_package, this module will define:
#
# GSTREAMER_<plugin_lib>_LIBRARY_FOUND - system has <plugin_lib>
# GSTREAMER_<plugin_lib>_LIBRARY - the <plugin_lib> library
# GSTREAMER_<plugin_lib>_INCLUDE_DIR - the <plugin_lib> include directory
#
# Copyright (c) 2010, Collabora Ltd.
# @author George Kiagiadakis <george.kiagiadakis@collabora.co.uk>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
if (GSTREAMER_INCLUDE_DIR AND GSTREAMER_LIBRARY)
set(GStreamer_FIND_QUIETLY TRUE)
else()
set(GStreamer_FIND_QUIETLY FALSE)
endif()
set(GSTREAMER_ABI_VERSION "1.0")
# Find the main library
find_package(PkgConfig)
if (PKG_CONFIG_FOUND)
pkg_check_modules(PKG_GSTREAMER gstreamer-${GSTREAMER_ABI_VERSION})
exec_program(${PKG_CONFIG_EXECUTABLE}
ARGS --variable pluginsdir gstreamer-${GSTREAMER_ABI_VERSION}
OUTPUT_VARIABLE PKG_GSTREAMER_PLUGIN_DIR)
set(GSTREAMER_DEFINITIONS ${PKG_GSTREAMER_CFLAGS})
endif()
find_library(GSTREAMER_LIBRARY
NAMES gstreamer-${GSTREAMER_ABI_VERSION}
HINTS ${PKG_GSTREAMER_LIBRARY_DIRS} ${PKG_GSTREAMER_LIBDIR})
find_path(GSTREAMER_INCLUDE_DIR
gst/gst.h
HINTS ${PKG_GSTREAMER_INCLUDE_DIRS} ${PKG_GSTREAMER_INCLUDEDIR}
PATH_SUFFIXES gstreamer-${GSTREAMER_ABI_VERSION})
if (PKG_GSTREAMER_PLUGIN_DIR)
set(_GSTREAMER_PLUGIN_DIR ${PKG_GSTREAMER_PLUGIN_DIR})
else()
get_filename_component(_GSTREAMER_LIB_DIR ${GSTREAMER_LIBRARY} PATH)
set(_GSTREAMER_PLUGIN_DIR ${_GSTREAMER_LIB_DIR}/gstreamer-${GSTREAMER_ABI_VERSION})
endif()
set(GSTREAMER_PLUGIN_DIR ${_GSTREAMER_PLUGIN_DIR}
CACHE PATH "The path to the gstreamer plugins installation directory")
mark_as_advanced(GSTREAMER_LIBRARY GSTREAMER_INCLUDE_DIR GSTREAMER_PLUGIN_DIR)
# Find additional libraries
include(MacroFindGStreamerLibrary)
macro(_find_gst_component _name _header)
find_gstreamer_library(${_name} ${_header} ${GSTREAMER_ABI_VERSION})
set(_GSTREAMER_EXTRA_VARIABLES ${_GSTREAMER_EXTRA_VARIABLES}
GSTREAMER_${_name}_LIBRARY GSTREAMER_${_name}_INCLUDE_DIR)
endmacro()
foreach(_component ${GStreamer_FIND_COMPONENTS})
if (${_component} STREQUAL "base")
_find_gst_component(BASE gstbasesink.h)
elseif (${_component} STREQUAL "check")
_find_gst_component(CHECK gstcheck.h)
elseif (${_component} STREQUAL "controller")
_find_gst_component(CONTROLLER gstargbcontrolbinding.h)
elseif (${_component} STREQUAL "net")
_find_gst_component(NET gstnet.h)
else()
message (AUTHOR_WARNING "FindGStreamerPluginsBase.cmake: Invalid component \"${_component}\" was specified")
endif()
endforeach()
# Version check
if (GStreamer_FIND_VERSION)
if (PKG_GSTREAMER_FOUND)
if("${PKG_GSTREAMER_VERSION}" VERSION_LESS "${GStreamer_FIND_VERSION}")
message(STATUS "Found GStreamer version ${PKG_GSTREAMER_VERSION}, but at least version ${GStreamer_FIND_VERSION} is required")
set(GSTREAMER_VERSION_COMPATIBLE FALSE)
else()
set(GSTREAMER_VERSION_COMPATIBLE TRUE)
endif()
elseif(GSTREAMER_INCLUDE_DIR)
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_INCLUDES ${GSTREAMER_INCLUDE_DIR})
string(REPLACE "." "," _comma_version ${GStreamer_FIND_VERSION})
# Hack to invalidate the cached value
set(GSTREAMER_VERSION_COMPATIBLE GSTREAMER_VERSION_COMPATIBLE)
check_cxx_source_compiles("
#define G_BEGIN_DECLS
#define G_END_DECLS
#include <gst/gstversion.h>
#if GST_CHECK_VERSION(${_comma_version})
int main() { return 0; }
#else
# error \"GStreamer version incompatible\"
#endif
" GSTREAMER_VERSION_COMPATIBLE)
if (NOT GSTREAMER_VERSION_COMPATIBLE)
message(STATUS "GStreamer ${GStreamer_FIND_VERSION} is required, but the version found is older")
endif()
else()
# We didn't find gstreamer at all
set(GSTREAMER_VERSION_COMPATIBLE FALSE)
endif()
else()
# No version constrain was specified, thus we consider the version compatible
set(GSTREAMER_VERSION_COMPATIBLE TRUE)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GStreamer DEFAULT_MSG
GSTREAMER_LIBRARY GSTREAMER_INCLUDE_DIR
GSTREAMER_VERSION_COMPATIBLE ${_GSTREAMER_EXTRA_VARIABLES})
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