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OpenSceneGraph/CMakeModules/FindGStreamer.cmake
Robert Osfield 6cd9932780 From Julen Garcia, "Here there is a small plugin I use to play video files. It is based on GStreamer http://gstreamer.freedesktop.org and I have used the FFmpeg plugin as inspiration." 
From Robert Osfield, fixed handled of row widths so that they are padded to a 4 byte boundary as certain row widths were being rendered incorrectly.


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14604 16af8721-9629-0410-8352-f15c8da7e697
2014-12-16 11:20:42 +00:00

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CMake
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# - Try to find GStreamer and its plugins
# Once done, this will define
#
# GSTREAMER_FOUND - system has GStreamer
# GSTREAMER_INCLUDE_DIRS - the GStreamer include directories
# GSTREAMER_LIBRARIES - link these to use GStreamer
#
# Additionally, gstreamer-base is always looked for and required, and
# the following related variables are defined:
#
# GSTREAMER_BASE_INCLUDE_DIRS - gstreamer-base's include directory
# GSTREAMER_BASE_LIBRARIES - link to these to use gstreamer-base
#
# Optionally, the COMPONENTS keyword can be passed to find_package()
# and GStreamer plugins can be looked for. Currently, the following
# plugins can be searched, and they define the following variables if
# found:
#
# gstreamer-app: GSTREAMER_APP_INCLUDE_DIRS and GSTREAMER_APP_LIBRARIES
# gstreamer-audio: GSTREAMER_AUDIO_INCLUDE_DIRS and GSTREAMER_AUDIO_LIBRARIES
# gstreamer-fft: GSTREAMER_FFT_INCLUDE_DIRS and GSTREAMER_FFT_LIBRARIES
# gstreamer-pbutils: GSTREAMER_PBUTILS_INCLUDE_DIRS and GSTREAMER_PBUTILS_LIBRARIES
# gstreamer-video: GSTREAMER_VIDEO_INCLUDE_DIRS and GSTREAMER_VIDEO_LIBRARIES
#
# Copyright (C) 2012 Raphael Kubo da Costa <rakuco@webkit.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Helper macro to find a GStreamer plugin (or GStreamer itself)
# _component_prefix is prepended to the _INCLUDE_DIRS and _LIBRARIES variables (eg. "GSTREAMER_AUDIO")
# _pkgconfig_name is the component's pkg-config name (eg. "gstreamer-1.0", or "gstreamer-video-1.0").
# _header is the component's header, relative to the gstreamer-1.0 directory (eg. "gst/gst.h").
# _library is the component's library name (eg. "gstreamer-1.0" or "gstvideo-1.0")
#macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
# pkg_check_modules(PC_${_component_prefix} QUIET ${_pkgconfig_name})
#
# find_path(${_component_prefix}_INCLUDE_DIRS
# NAMES ${_header}
# HINTS ${PC_${_component_prefix}_INCLUDE_DIRS} ${PC_${_component_prefix}_INCLUDEDIR}
# PATH_SUFFIXES gstreamer-1.0
# )
#
# find_library(${_component_prefix}_LIBRARIES
# NAMES ${_library}
# HINTS ${PC_${_component_prefix}_LIBRARY_DIRS} ${PC_${_component_prefix}_LIBDIR}
# )
#endmacro()
if (WIN32)
macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
find_path(${_component_prefix}_INCLUDE_DIRS
NAMES ${_header}
PATHS C:/gstreamer/1.0/x86_64/include
PATH_SUFFIXES gstreamer-1.0
)
find_library(${_component_prefix}_LIBRARIES
NAMES ${_library}
PATHS C:/gstreamer/1.0/x86_64/lib
)
endmacro()
else ()
find_package(PkgConfig)
macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
pkg_check_modules(PC_${_component_prefix} QUIET ${_pkgconfig_name})
find_path(${_component_prefix}_INCLUDE_DIRS
NAMES ${_header}
HINTS ${PC_${_component_prefix}_INCLUDE_DIRS} ${PC_${_component_prefix}_INCLUDEDIR}
PATH_SUFFIXES gstreamer-1.0
)
find_library(${_component_prefix}_LIBRARIES
NAMES ${_library}
HINTS ${PC_${_component_prefix}_LIBRARY_DIRS} ${PC_${_component_prefix}_LIBDIR}
)
endmacro()
endif ()
# ------------------------
# 1. Find GStreamer itself
# ------------------------
# 1.1. Find headers and libraries
FIND_GSTREAMER_COMPONENT(GSTREAMER gstreamer-1.0 gst/gst.h gstreamer-1.0)
#FIND_GSTREAMER_COMPONENT(GSTREAMER_BASE gstreamer-base-1.0 gst/gst.h gstbase-1.0)
# 1.2. Check GStreamer version
if (GSTREAMER_INCLUDE_DIRS)
if (EXISTS "${GSTREAMER_INCLUDE_DIRS}/gst/gstversion.h")
file(READ "${GSTREAMER_INCLUDE_DIRS}/gst/gstversion.h" GSTREAMER_VERSION_CONTENTS)
string(REGEX MATCH "#define +GST_VERSION_MAJOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MAJOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define +GST_VERSION_MINOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MINOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define +GST_VERSION_MICRO +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MICRO "${CMAKE_MATCH_1}")
set(GSTREAMER_VERSION "${GSTREAMER_VERSION_MAJOR}.${GSTREAMER_VERSION_MINOR}.${GSTREAMER_VERSION_MICRO}")
endif ()
endif ()
if ("${GStreamer_FIND_VERSION}" VERSION_GREATER "${GSTREAMER_VERSION}")
message(FATAL_ERROR "Required version (" ${GStreamer_FIND_VERSION} ") is higher than found version (" ${GSTREAMER_VERSION} ")")
endif ()
# -------------------------
# 2. Find GStreamer plugins
# -------------------------
FIND_GSTREAMER_COMPONENT(GSTREAMER_APP gstreamer-app-1.0 gst/app/gstappsink.h gstapp-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_AUDIO gstreamer-audio-1.0 gst/audio/audio.h gstaudio-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_FFT gstreamer-fft-1.0 gst/fft/gstfft.h gstfft-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_PBUTILS gstreamer-pbutils-1.0 gst/pbutils/pbutils.h gstpbutils-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_VIDEO gstreamer-video-1.0 gst/video/video.h gstvideo-1.0)
# ------------------------------------------------
# 3. Process the COMPONENTS passed to FIND_PACKAGE
# ------------------------------------------------
set(_GSTREAMER_REQUIRED_VARS GSTREAMER_INCLUDE_DIRS GSTREAMER_LIBRARIES GSTREAMER_VERSION GSTREAMER_BASE_INCLUDE_DIRS GSTREAMER_BASE_LIBRARIES)
foreach (_component ${GStreamer_FIND_COMPONENTS})
set(_gst_component "GSTREAMER_${_component}")
string(TOUPPER ${_gst_component} _UPPER_NAME)
list(APPEND _GSTREAMER_REQUIRED_VARS ${_UPPER_NAME}_INCLUDE_DIRS ${_UPPER_NAME}_LIBRARIES)
endforeach ()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer REQUIRED_VARS _GSTREAMER_REQUIRED_VARS
VERSION_VAR GSTREAMER_VERSION)
mark_as_advanced(
GSTREAMER_APP_INCLUDE_DIRS
GSTREAMER_APP_LIBRARIES
GSTREAMER_AUDIO_INCLUDE_DIRS
GSTREAMER_AUDIO_LIBRARIES
GSTREAMER_BASE_INCLUDE_DIRS
GSTREAMER_BASE_LIBRARIES
GSTREAMER_FFT_INCLUDE_DIRS
GSTREAMER_FFT_LIBRARIES
GSTREAMER_INCLUDE_DIRS
GSTREAMER_LIBRARIES
GSTREAMER_PBUTILS_INCLUDE_DIRS
GSTREAMER_PBUTILS_LIBRARIES
GSTREAMER_VIDEO_INCLUDE_DIRS
GSTREAMER_VIDEO_LIBRARIES
)
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