# - Try to find Gstreamer and its plugins

# Once done, this will define

#

#  GSTREAMER_1_0_FOUND - system has Gstreamer

#  GSTREAMER_1_0_INCLUDE_DIRS - the Gstreamer include directories

#  GSTREAMER_1_0_LIBRARIES - link these to use Gstreamer

#

# Additionally, gstreamer-base is always looked for and required, and

# the following related variables are defined:

#

#  GSTREAMER_1_0_BASE_INCLUDE_DIRS - gstreamer-base's include directory

#  GSTREAMER_1_0_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_1_0_APP_INCLUDE_DIRS and GSTREAMER_1_0_APP_LIBRARIES

#  gstreamer-audio:      GSTREAMER_1_0_AUDIO_INCLUDE_DIRS and GSTREAMER_1_0_AUDIO_LIBRARIES

#  gstreamer-fft:        GSTREAMER_1_0_FFT_INCLUDE_DIRS and GSTREAMER_1_0_FFT_LIBRARIES

#  gstreamer-pbutils:    GSTREAMER_1_0_PBUTILS_INCLUDE_DIRS and GSTREAMER_1_0_PBUTILS_LIBRARIES

#  gstreamer-video:      GSTREAMER_1_0_VIDEO_INCLUDE_DIRS and GSTREAMER_1_0_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.

find_package(PkgConfig)

# The minimum Gstreamer version we support.

set(GSTREAMER_1_0_MINIMUM_VERSION 1.0.5)

# Helper macro to find a Gstreamer plugin (or Gstreamer itself)

#   _component_prefix is prepended to the _INCLUDE_DIRS and _LIBRARIES variables (eg. "GSTREAMER_1_0_AUDIO")

#   _pkgconfig_name is the component's pkg-config name (eg. "gstreamer-1.0", or "gstreamer-video-1.0").

#   _library is the component's library name (eg. "gstreamer-1.0" or "gstvideo-1.0")

macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _library)

    # FIXME: The QUIET keyword can be used once we require CMake 2.8.2.

    string(REGEX MATCH "(.*)>=(.*)" _dummy "${_pkgconfig_name}")

    if ("${CMAKE_MATCH_2}" STREQUAL "")

        pkg_check_modules(PC_${_component_prefix} "${_pkgconfig_name} >= ${GSTREAMER_1_0_MINIMUM_VERSION}")

    else ()

        pkg_check_modules(PC_${_component_prefix} ${_pkgconfig_name})

    endif ()

    set(${_component_prefix}_INCLUDE_DIRS ${PC_${_component_prefix}_INCLUDE_DIRS})

    find_library(${_component_prefix}_LIBRARIES

        NAMES ${_library} gstreamer_android

        HINTS ${PC_${_component_prefix}_LIBRARY_DIRS} ${PC_${_component_prefix}_LIBDIR} ${GSTREAMER_1_0_ROOT_DIR}

    )

endmacro()

# ------------------------

# 1. Find Gstreamer itself

# ------------------------

# 1.1. Find headers and libraries

set(GLIB_ROOT_DIR ${GSTREAMER_1_0_ROOT_DIR})

find_package(Glib REQUIRED)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0 gstreamer-1.0 gstreamer-1.0)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_BASE gstreamer-base-1.0 gstbase-1.0)

# 1.2. Check Gstreamer version

if (GSTREAMER_1_0_INCLUDE_DIRS)

    if (EXISTS "${GSTREAMER_1_0_INCLUDE_DIRS}/gst/gstversion.h")

        file(READ "${GSTREAMER_1_0_INCLUDE_DIRS}/gst/gstversion.h" GSTREAMER_VERSION_CONTENTS)

        string(REGEX MATCH "#define +GST_VERSION_MAJOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")

        set(GSTREAMER_1_0_VERSION_MAJOR "${CMAKE_MATCH_1}")

        string(REGEX MATCH "#define +GST_VERSION_MINOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_1_0_VERSION_CONTENTS}")

        set(GSTREAMER_1_0_VERSION_MINOR "${CMAKE_MATCH_1}")

        string(REGEX MATCH "#define +GST_VERSION_MICRO +\\(([0-9]+)\\)" _dummy "${GSTREAMER_1_0_VERSION_CONTENTS}")

        set(GSTREAMER_1_0_VERSION_MICRO "${CMAKE_MATCH_1}")

        set(GSTREAMER_1_0_VERSION "${GSTREAMER_1_0_VERSION_MAJOR}.${GSTREAMER_1_0_VERSION_MINOR}.${GSTREAMER_1_0_VERSION_MICRO}")

    endif ()

endif ()

# FIXME: With CMake 2.8.3 we can just pass GSTREAMER_1_0_VERSION to FIND_PACKAGE_HANDLE_STANDARD_ARGS as VERSION_VAR

#        and remove the version check here (GSTREAMER_1_0_MINIMUM_VERSION would be passed to FIND_PACKAGE).

set(VERSION_OK TRUE)

if ("${GSTREAMER_1_0_VERSION}" VERSION_LESS "${GSTREAMER_1_0_MINIMUM_VERSION}")

    set(VERSION_OK FALSE)

endif ()

# -------------------------

# 2. Find Gstreamer plugins

# -------------------------

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_APP gstreamer-app-1.0 gstapp-1.0)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_AUDIO gstreamer-audio-1.0 gstaudio-1.0)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_FFT gstreamer-fft-1.0 gstfft-1.0)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_PBUTILS gstreamer-pbutils-1.0 gstpbutils-1.0)

FIND_GSTREAMER_COMPONENT(GSTREAMER_1_0_VIDEO gstreamer-video-1.0 gstvideo-1.0)

# ------------------------------------------------

# 3. Process the COMPONENTS passed to FIND_PACKAGE

# ------------------------------------------------

set(_GSTREAMER_1_0_REQUIRED_VARS

	Glib_INCLUDE_DIRS

	Glib_LIBRARIES

	GSTREAMER_1_0_INCLUDE_DIRS

	GSTREAMER_1_0_LIBRARIES

	VERSION_OK

	GSTREAMER_1_0_BASE_INCLUDE_DIRS

	GSTREAMER_1_0_BASE_LIBRARIES)

include(FindPackageHandleStandardArgs)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(GSTREAMER_1_0 DEFAULT_MSG GSTREAMER_1_0_LIBRARIES GSTREAMER_1_0_INCLUDE_DIRS)

list(APPEND GSTREAMER_1_0_INCLUDE_DIRS ${Glib_INCLUDE_DIRS})

list(APPEND GSTREAMER_1_0_LIBRARIES ${Glib_LIBRARIES})

list(APPEND GSTREAMER_1_0_INCLUDE_DIRS ${GSTREAMER_1_0_BASE_INCLUDE_DIRS})

list(APPEND GSTREAMER_1_0_LIBRARIES ${GSTREAMER_1_0_BASE_LIBRARIES})

list(APPEND GSTREAMER_1_0_INCLUDE_DIRS ${GSTREAMER_1_0_APP_INCLUDE_DIRS})

list(APPEND GSTREAMER_1_0_LIBRARIES ${GSTREAMER_1_0_APP_LIBRARIES})

list(APPEND GSTREAMER_1_0_INCLUDE_DIRS ${GSTREAMER_1_0_VIDEO_INCLUDE_DIRS})

list(APPEND GSTREAMER_1_0_LIBRARIES ${GSTREAMER_1_0_VIDEO_LIBRARIES})

foreach (_component ${Gstreamer_FIND_COMPONENTS})

    set(_gst_component "GSTREAMER_1_0_${_component}")

    string(TOUPPER ${_gst_component} _UPPER_NAME)

    FIND_PACKAGE_HANDLE_STANDARD_ARGS(${_UPPER_NAME} DEFAULT_MSG ${_UPPER_NAME}_INCLUDE_DIRS ${_UPPER_NAME}_LIBRARIES)

    list(APPEND GSTREAMER_1_0_INCLUDE_DIRS ${${_UPPER_NAME}_INCLUDE_DIRS})

    list(APPEND GSTREAMER_1_0_LIBRARIES ${${_UPPER_NAME}_LIBRARIES})

endforeach ()

MARK_AS_ADVANCED(GSTREAMER_1_0_INCLUDE_DIRS GSTREAMER_1_0_LIBRARIES GSTREAMER_1_0_BASE_LIBRARY GSTREAMER_1_0_APP_LIBRARY)