configure.ac 54.5 KB
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dnl autoconf configuration file for gst-plugins 
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AC_INIT
AC_CANONICAL_TARGET([])

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dnl We disable static building for development, for time savings
dnl this goes before AS_LIBTOOL to appease autoconf
dnl *NOTE*: dnl this line before release, so release does static too
AM_DISABLE_STATIC

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dnl AM_MAINTAINER_MODE only provides the option to configure to enable it
AM_MAINTAINER_MODE

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dnl when going to/from release please set the nano (fourth number) right !
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dnl releases only do Wall, cvs and prerelease does Werror too
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AS_VERSION(gst-plugins, GST_PLUGINS_VERSION, 0, 7, 4, 1, GST_CVS="no", GST_CVS="yes")
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dnl add a suffix to apps
if test x$program_suffix = xNONE ; then
  program_suffix=-$GST_PLUGINS_VERSION_MAJOR.$GST_PLUGINS_VERSION_MINOR
fi

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AM_INIT_AUTOMAKE($PACKAGE,$VERSION)
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dnl our libraries and install dirs use major.minor as a version
GST_MAJORMINOR=$GST_PLUGINS_VERSION_MAJOR.$GST_PLUGINS_VERSION_MINOR
AC_SUBST(GST_MAJORMINOR)

dnl CURRENT, REVISION, AGE
dnl - library source changed -> increment REVISION
dnl - interfaces added/removed/changed -> increment CURRENT, REVISION = 0
dnl - interfaces added -> increment AGE
dnl - interfaces removed -> AGE = 0
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AS_LIBTOOL(GST_PLUGINS, 2, 0, 0)
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AM_PROG_LIBTOOL
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dnl FIXME take something else ?
AC_CONFIG_SRCDIR([gst/law/alaw.c])
AM_CONFIG_HEADER(config.h)
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dnl Add parameters for aclocal
dnl (This must come after AM_INIT_AUTOMAKE, since it modifies ACLOCAL)
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ACLOCAL_FLAGS="-I m4 -I common/m4"
AC_SUBST(ACLOCAL_AMFLAGS, $ACLOCAL_FLAGS)
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AC_PROG_CC
AM_PROG_CC_STDC
AM_PROG_AS
AS="${CC}"
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dnl the gettext stuff needed
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AM_GNU_GETTEXT_VERSION(0.11.5)
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AM_GNU_GETTEXT([external])
                                                                                
GETTEXT_PACKAGE=gst-plugins-$GST_MAJORMINOR
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], "$GETTEXT_PACKAGE",
                   [gettext package name])
                                                                                
dnl define LOCALEDIR in config.h
AS_AC_EXPAND(LOCALEDIR, $datadir/locale)
AC_DEFINE_UNQUOTED([LOCALEDIR], "$LOCALEDIR",
                   [gettext locale dir])

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dnl decide on error flags
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AS_COMPILER_FLAG(-Wall, GST_WALL="yes", GST_WALL="no")
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if test "x$GST_WALL" = "xyes"; then
   GST_ERROR="$GST_ERROR -Wall"

   if test "x$GST_CVS" = "xyes"; then
     AS_COMPILER_FLAG(-Werror,GST_ERROR="$GST_ERROR -Werror",GST_ERROR="$GST_ERROR")
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     GST_ERROR="$GST_ERROR -DG_DISABLE_DEPRECATED"
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   fi
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fi

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dnl determine c++ compiler
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AC_PROG_CXX
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dnl determine if c++ is available on this system
AC_CHECK_PROG(HAVE_CXX, $CXX, yes, no)
dnl determine c++ preprocessor
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AC_PROG_CXXCPP
AC_ISC_POSIX

AC_HEADER_STDC([])
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AC_C_INLINE
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AX_CREATE_STDINT_H
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dnl Check for a way to display the function name in debug output
GST_CHECK_FUNCTION()

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dnl define correct errorlevel for debugging messages. We want to have GST_ERROR
dnl messages printed when running cvs builds
if test "x$GST_CVS" = "xyes"; then
  AC_DEFINE(GST_LEVEL_DEFAULT, GST_LEVEL_ERROR, [Default errorlevel to use])
fi

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dnl ############################################
dnl # Super Duper options for plug-in building #
dnl ############################################

dnl ext plug-ins; plug-ins that have external dependencies
GST_CHECK_FEATURE(EXTERNAL, [enable building of plug-ins with external deps],,
[HAVE_EXTERNAL=yes],enabled,
[
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  AC_MSG_WARN(building external plug-ins)
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  BUILD_EXTERNAL="yes"
],[
  AC_MSG_WARN(all plug-ins with external dependencies will not be built)
  BUILD_EXTERNAL="no"
])
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# make BUILD_EXTERNAL available to Makefile.am
AM_CONDITIONAL(BUILD_EXTERNAL, test "x$BUILD_EXTERNAL" = "xyes")
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dnl experimental plug-ins; stuff that hasn't had the dust settle yet
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dnl read 'builds, but might not work'UTO
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GST_CHECK_FEATURE(EXPERIMENTAL, [enable building of experimental plug-ins],,
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[HAVE_EXPERIMENTAL=yes],disabled,
[
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  AC_MSG_WARN(building experimental plug-ins)
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  USE_TARKIN="yes"
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  USE_SHOUT2="yes"
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],[
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  AC_MSG_NOTICE(not building experimental plug-ins)
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  USE_TARKIN="no"
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  USE_SHOUT2="no"
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])
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dnl broken plug-ins; stuff that doesn't seem to build at the moment
GST_CHECK_FEATURE(BROKEN, [enable building of broken plug-ins],,
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HAVE_BROKEN=yes,disabled,
[  
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  AC_MSG_WARN([building broken plug-ins -- no bug reports on these, only patches :)])
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],[
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  AC_MSG_NOTICE([not building broken plug-ins])
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])
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dnl ##############################
dnl # Do automated configuration #
dnl ##############################

dnl Check for tools:
dnl ================

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dnl allow for different autotools
AS_AUTOTOOLS_ALTERNATE()

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dnl modify pkg-config path
AC_ARG_WITH(pkg-config-path, 
   AC_HELP_STRING([--with-pkg-config-path],[colon-separated list of pkg-config(1) dirs]),
   [export PKG_CONFIG_PATH=${withval}])

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dnl Check for nasm
AC_PATH_PROG(NASM_PATH, nasm, no)
AC_SUBST(NASM_PATH)
if test x$NASM_PATH = xno; then
  AC_MSG_WARN(Couldn't find nasm)
  HAVE_NASM="no"
else
  AC_DEFINE(HAVE_NASM, 1, [Define if NASM, the netwide assembler, is available])
  HAVE_NASM="yes"
fi

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dnl check for gconftool-2
translit(dnm, m, l) AM_CONDITIONAL(USE_GCONFTOOL, true)
GST_CHECK_FEATURE(GCONFTOOL, [GConf schemas], , [
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  AC_PATH_PROG(GCONFTOOL, gconftool-2, no)
  if test x$GCONFTOOL = xno; then
    AC_MSG_WARN(Not installing GConf schemas)
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    HAVE_GCONFTOOL="no"
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  else
    AM_GCONF_SOURCE_2
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    HAVE_GCONFTOOL="yes"
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  fi
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  AC_SUBST(HAVE_GCONFTOOL)
])

dnl check for GConf libraries
translit(dnm, m, l) AM_CONDITIONAL(USE_GCONF, true)
GST_CHECK_FEATURE(GCONF, [GConf libraries], , [
  PKG_CHECK_MODULES(GCONF, gconf-2.0, HAVE_GCONF="yes", HAVE_GCONF="no")
  AC_SUBST(GCONF_CFLAGS)
  AC_SUBST(GCONF_LIBS)
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])
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dnl check for gstreamer; uninstalled is selected preferentially -- see pkg-config(1)
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PKG_CHECK_MODULES(GST, gstreamer-$GST_MAJORMINOR >= $GST_PLUGINS_VERSION_MAJOR.$GST_PLUGINS_VERSION_MINOR.$GST_PLUGINS_VERSION_MICRO,
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  HAVE_GST="yes", HAVE_GST="no")
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if test "x$HAVE_GST" = "xno"; then
  AC_MSG_ERROR(no GStreamer found)
fi
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GST_TOOLS_DIR=`pkg-config --variable=toolsdir gstreamer-$GST_MAJORMINOR`
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if test -z $GST_TOOLS_DIR; then
  AC_MSG_ERROR([no tools dir defined in GStreamer pkg-config file; core upgrade needed.])
fi
AC_SUBST(GST_TOOLS_DIR)

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dnl check for gstreamer-control; uninstalled is selected preferentially
PKG_CHECK_MODULES(GST_CONTROL, gstreamer-control-$GST_MAJORMINOR >= $GST_PLUGINS_VERSION_MAJOR.$GST_PLUGINS_VERSION_MINOR.$GST_PLUGINS_VERSION_MICRO,
  HAVE_GST_CONTROL="yes", HAVE_GST_CONTROL="no")

if test "x$HAVE_GST_CONTROL" = "xno"; then
  AC_MSG_ERROR(no GStreamer Control Libs found)
fi

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AC_SUBST(GST_CONTROL_LIBS)

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dnl Set up conditionals for (target) architecture:
dnl ==============================================

dnl Determine CPU
case "x${target_cpu}" in
  xi?86 | k?) HAVE_CPU_I386=yes
              AC_DEFINE(HAVE_CPU_I386, 1, [Define if the target CPU is an x86])
              dnl FIXME could use some better detection
              dnl       (ie CPUID)
              case "x${target_cpu}" in
                xi386 | xi486) ;;
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                *)             AC_DEFINE(HAVE_RDTSC, 1, [Define if RDTSC is available]) ;;
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              esac ;;
  xpowerpc)   HAVE_CPU_PPC=yes
              AC_DEFINE(HAVE_CPU_PPC, 1, [Define if the target CPU is a PPC]) ;;
  xalpha)     HAVE_CPU_ALPHA=yes
              AC_DEFINE(HAVE_CPU_ALPHA, 1, [Define if the target CPU is an Alpha]) ;;
  xarm*)      HAVE_CPU_ARM=yes
              AC_DEFINE(HAVE_CPU_ARM, 1, [Define if the target CPU is an ARM]) ;;
  xsparc*)    HAVE_CPU_SPARC=yes
              AC_DEFINE(HAVE_CPU_SPARC, 1, [Define if the target CPU is a PPC]) ;;
  xmips*)     HAVE_CPU_MIPS=yes
              AC_DEFINE(HAVE_CPU_MIPS, 1, [Define if the target CPU is a MIPS]) ;;
  xhppa*)     HAVE_CPU_HPPA=yes
              AC_DEFINE(HAVE_CPU_HPPA, 1, [Define if the target CPU is a HPPA]) ;;
esac
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# make these available to automake
AM_CONDITIONAL(HAVE_CPU_I386,       test "x$HAVE_CPU_I386" = "xyes")
AM_CONDITIONAL(HAVE_CPU_PPC,        test "x$HAVE_CPU_PPC" = "xyes")
AM_CONDITIONAL(HAVE_CPU_ALPHA,      test "x$HAVE_CPU_ALPHA" = "xyes")
AM_CONDITIONAL(HAVE_CPU_ARM,        test "x$HAVE_CPU_ARM" = "xyes")
AM_CONDITIONAL(HAVE_CPU_SPARC,      test "x$HAVE_CPU_SPARC" = "xyes")
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dnl Determine endianness
AC_C_BIGENDIAN

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dnl Check for fast float to int casting as defined in C99
AC_C99_FUNC_LRINT()
AC_C99_FUNC_LRINTF()

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dnl Check for essential libraries first:
dnl ====================================

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GST_GLIB2_CHECK()
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dnl Check for additional libraries that we might use:
dnl =================================================
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dnl GTK
HAVE_GTK=NO
PKG_CHECK_MODULES(GTK2, gtk+-2.0 >= 2.2.0, HAVE_GTK_22=yes, HAVE_GTK_22=no)
if test "x$HAVE_GTK_22" = "xyes"; then
  HAVE_GTK=yes
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  GTK_VERSION=`$PKG_CONFIG --variable=gtk_binary_version gtk+-2.0`
  AC_SUBST(GTK_VERSION)
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  GTK_PREFIX=`$PKG_CONFIG --variable=prefix gdk-pixbuf-2.0`
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  GDK_PIXBUF_LIBDIR=`$PKG_CONFIG --variable=libdir gdk-pixbuf-2.0`
  GDK_PIXBUF_PREFIXDIR=`$PKG_CONFIG --variable=prefix gdk-pixbuf-2.0`
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  AC_SUBST(GTK_BASE_DIR)
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else
  PKG_CHECK_MODULES(GTK2, gtk+-2.0, HAVE_GTK_20=yes, HAVE_GTK_20=no)
fi
if test "x$HAVE_GTK_20" = "xyes"; then
  HAVE_GTK=yes
fi
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GTK_CFLAGS=$GTK2_CFLAGS
GTK_LIBS=$GTK2_LIBS
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AC_SUBST(GTK_LIBS)
AC_SUBST(GTK_CFLAGS)
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AC_SUBST(HAVE_GTK)
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# gdk_pixbuf gstreamer loader is considered experimental, so disable
# by default
if test "x$HAVE_GTK_22" = "xyes"; then
  HAVE_GDK_LOADERS=yes
else
  HAVE_GDK_LOADERS=no
fi

AC_ARG_ENABLE(gdk-pixbuf-loader,
  AC_HELP_STRING([--enable-gdk-pixbuf-loader],
              [whether to enable building of gdk_pixbuf loader]),
              :, HAVE_GDK_LOADERS="no")
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# allow customization of pixbuf loader install location
# when nothing specified, adhere to prefix settings
# when called without any option with this argument, autodetect
# when called with a path, set to the given path
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if test "x$HAVE_GDK_LOADERS" == "xyes"; then
  AC_PATH_PROG(QUERYLOADERS, gdk-pixbuf-query-loaders, no)
  AC_ARG_WITH(gdk-pixbuf-loader-dir, 
     AC_HELP_STRING([--with-gdk-pixbuf-loader-dir],
     	[directory to install the gdk_pixbuf loader (none for pkg-config default)]),
     [
      if test "x${withval}" != xyes ; then
     	GDK_PIXBUF_LOADER_DIR="${withval}"
      else
        GDK_PIXBUF_LOADER_DIR="$GDK_PIXBUF_LIBDIR/gtk-2.0/\$GTK_VERSION/loaders"
      fi
     ],
     # nothing specified
     GDK_PIXBUF_LOADER_DIR=${libdir}/gtk-2.0/\$GTK_VERSION/loaders
  )
  AS_AC_EXPAND(GDK_PIXBUF_LOADER_DIR, $GDK_PIXBUF_LOADER_DIR)
  AC_SUBST(GDK_PIXBUF_LOADER_DIR)
  AC_MSG_NOTICE([Putting GTK+-2 pixbuf loaders in $GDK_PIXBUF_LOADER_DIR])
  
  # allow customization of pixbuf loader configuration file
  # when nothing specified, adhere to prefix settings
  # when called without any option with this argument, autodetect
  # when called with a path, set to the given path
  AC_ARG_WITH(gdk-pixbuf-conf-dir, 
     AC_HELP_STRING([--with-gdk-pixbuf-conf-dir],
     	[directory to install the gdk_pixbuf config (none for pkg-config default)]),
     [
      if test "x${withval}" != xyes ; then
        GDK_PIXBUF_CONF_DIR="${withval}"
      else
        GDK_PIXBUF_CONF_DIR="$GDK_PIXBUF_PREFIXDIR/etc/gtk-2.0/"
      fi
     ],
     # nothing specified
     GDK_PIXBUF_LOADER_DIR=${libdir}/gtk-2.0/\$GTK_VERSION/loaders
     GDK_PIXBUF_CONF_DIR=${sysconfdir}/gtk-2.0
  )
  AS_AC_EXPAND(GDK_PIXBUF_CONF_DIR, $GDK_PIXBUF_CONF_DIR)
  AC_SUBST(GDK_PIXBUF_CONF_DIR)
  AC_MSG_NOTICE([Putting GTK+-2 pixbuf loader config in $GDK_PIXBUF_CONF_DIR])
fi
AM_CONDITIONAL(HAVE_GDK_LOADERS, test "x$HAVE_GDK_LOADERS" = "xyes")
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PKG_CHECK_MODULES(LIBOIL, liboil-0.1, HAVE_LIBOIL=yes, HAVE_LIBOIL=no)
AC_SUBST(LIBOIL_CFLAGS)
AC_SUBST(LIBOIL_LIBS)
if test "x${HAVE_LIBOIL}" = xyes ; then
  #AC_DEFINE_UNQUOTED(HAVE_LIBOIL, 1, [Define if liboil is being used])
  true
fi

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dnl ===========================================================================
dnl ============================= gst plug-ins ================================
dnl ===========================================================================
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plugindir="\$(libdir)/gstreamer-$GST_MAJORMINOR"
AC_SUBST(plugindir)

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GST_PLUGIN_LDFLAGS='-module -avoid-version'
AC_SUBST(GST_PLUGIN_LDFLAGS)
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dnl these are all the gst plug-ins, compilable without additional libs
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GST_PLUGINS_ALL="\
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	ac3parse \
	adder \
	asfdemux \
	audioconvert \
	audioscale \
	auparse \
	avi \
	cdxaparse \
	chart \
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	colorspace \
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	cutter \
	debug \
	deinterlace \
	effectv \
	festival \
	filter \
	flx \
	goom \
	id3 \
	intfloat \
	law \
	level \
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	matroska \
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	median \
	mixmatrix \
	mpeg1sys \
	mpeg1videoparse \
	mpeg2sub \
	mpegaudio \
	mpegaudioparse \
	mpegstream \
	monoscope \
	oneton \
	overlay \
	passthrough \
	playondemand \
	qtdemux \
	realmedia \
	rtjpeg \
	rtp \
	silence \
	sine \
	smooth \
	smpte \
	spectrum \
	speed \
	stereo \
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	switch \
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	synaesthesia \
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	tags \
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	tcp \
	typefind \
	udp \
	vbidec \
	videocrop \
	videodrop \
	videoflip \
	videofilter \
	videoscale \
	videotestsrc \
	volenv \
	volume \
	wavenc \
	wavparse \
	y4m"
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dnl see if we can build C++ plug-ins
if test "x$HAVE_CXX" = "xyes"; then
  GST_PLUGINS_ALL="$GST_PLUGINS_ALL \
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                  modplug"
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else
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  AC_MSG_WARN([Not compiling plug-ins requiring C++ compiler])
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fi
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AC_SUBST(GST_PLUGINS_ALL)

GST_PLUGINS_SELECTED=""

AC_ARG_WITH(plugins,
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    AC_HELP_STRING([--with-plugins],[comma-separated list of plug-ins to compile]),
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    [for i in `echo $withval | tr , ' '`; do
        if test -n `echo $i | grep $GST_PLUGINS_ALL`; then
            GST_PLUGINS_SELECTED="$GST_PLUGINS_SELECTED $i"
        else
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            echo "plug-in $i not recognized, ignoring..."
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        fi
    done],
    [GST_PLUGINS_SELECTED=$GST_PLUGINS_ALL])

AC_SUBST(GST_PLUGINS_SELECTED)
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dnl ==========================================================================
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dnl ============================= sys plug-ins ================================
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dnl ==========================================================================

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dnl *** DXR3 card ***
translit(dnm, m, l) AM_CONDITIONAL(USE_DXR3, true)
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GST_CHECK_FEATURE(DXR3, [DXR3 hardware MPEG DVD decoder],
  dxr3videosink dxr3audiosink dxr3spusink, [
  HAVE_DXR3=yes
  AC_CHECK_HEADER(linux/em8300.h, ,
                  [ AC_MSG_WARN([DXR3/em8300 header file not found]) &&
                    HAVE_DXR3=no ] )
  AC_CHECK_HEADER(linux/soundcard.h, ,
                  [ AC_MSG_WARN([Generic sound header file not found]) &&
                    HAVE_DXR3=no ] )
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])

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dnl *** OSS audio ***
translit(dnm, m, l) AM_CONDITIONAL(USE_OSS, true)
GST_CHECK_FEATURE(OSS, [OSS audio], osssrc osssink, [
  AC_CHECK_HEADER(sys/soundcard.h, HAVE_OSS="yes", HAVE_OSS="no")
])

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dnl *** QuickCam ***
translit(dnm, m, l) AM_CONDITIONAL(USE_QCAM, true)
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GST_CHECK_FEATURE(QCAM, [QuickCam], qcamsrc, [
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  if test "x$HAVE_CPU_I386" != "xyes";
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  then
    HAVE_QCAM="no"
  else
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    AC_CHECK_HEADER(sys/io.h, HAVE_QCAM="yes", HAVE_QCAM="no")
  fi
  if test "x$HAVE_QCAM" != "xyes";
  then
    AC_MSG_WARN([QuickCam only works on i386-linux])
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  fi
])
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dnl *** Video CD ***
translit(dnm, m, l) AM_CONDITIONAL(USE_VCD, true)
GST_CHECK_FEATURE(VCD, [Video CD], vcdsrc, [
  AC_CHECK_HEADER(linux/cdrom.h, HAVE_VCD="yes", HAVE_VCD="no")
])

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dnl *** CDROM Audio ***
translit(dnm, m, l) AM_CONDITIONAL(USE_CDROM, true)
GST_CHECK_FEATURE(CDROM, [CDROM Audio], cdrom, [
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  AC_CHECK_HEADERS(linux/cdrom.h) dnl linux
  AC_CHECK_HEADERS(sys/cdio.h) dnl almost everything else
dnl  AC_CHECK_HEADERS(dmedia/cdaudio.h) dnl irix

  if test "${ac_cv_header_linux_cdrom_h}" = "yes" || test "${ac_cv_header_sys_cdio_h}" = "yes" || test "${ac_cv_header_dmedia_cdaudio_h}" = "yes"; then
	case "$host" in 
		*-sun-* | *-*-linux*)
			AC_DEFINE(HAVE_CDROM_SOLARIS,, [Define if cdrom access is in Solaris style])
		;;
		*-*-freebsd*)
			AC_DEFINE(HAVE_CDROM_BSD,, [Define if cdrom access is in BSD style])
		;;
		*-*-netbsd* | *-*-openbsd*)
			AC_DEFINE(HAVE_CDROM_BSD,, [Define if cdrom access is in BSD style])
			AC_DEFINE(HAVE_CDROM_BSD_NETBSD,, [Define if cdrom access uses NetBSD variant])
		;;
		*-*darwin*)
			AC_DEFINE(HAVE_CDROM_BSD,, [Define if cdrom access is in BSD style])
			AC_DEFINE(HAVE_CDROM_BSD_DARWIN,, [Define if cdrom access uses Darwin variant])
		;;
dnl		*-irix-*)
dnl			AC_DEFINE(HAVE_CDROM_IRIX,, [Define if cdrom access is in Irix DMedia style])
dnl		;;
    esac

	HAVE_CDROM="yes"
  else
	HAVE_CDROM="no"
  fi
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])

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dnl Check for X11
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translit(dnm, m, l) AM_CONDITIONAL(USE_X, true)
GST_CHECK_FEATURE(X, [X libraries and plugins],
                  [ximagesink], [
  AC_PATH_XTRA
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dnl  if test "x$X_CFLAGS" == "x" -o "$X_CFLAGS" == "-DX_DISPLAY_MISSING"
  if test "x$X_DISPLAY_MISSING" = "x1"
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  then
    AC_MSG_NOTICE([cannot find X11 development files])
    HAVE_X="no"
  else
    dnl this is much more than we want
    X_LIBS="$X_LIBS $X_PRE_LIBS $X_EXTRA_LIBS"
    dnl AC_PATH_XTRA only defines the path needed to find the X libs, not the libs
    dnl therefore we add them here
    X_LIBS="$X_LIBS -lX11"
    AC_SUBST(X_CFLAGS)
    AC_SUBST(X_LIBS)
    HAVE_X="yes"
  fi
  AC_SUBST(HAVE_X)
])
  
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dnl *** XVideo ***
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dnl Look for the PIC library first, Debian requires it.
dnl Check debian-devel archives for gory details.
dnl 20020110:
dnl At the moment XFree86 doesn't distribute shared libXv due
dnl to unstable API.  On many platforms you CAN NOT link a shared
dnl lib to a static non-PIC lib.  This is what the xvideo GStreamer
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dnl plug-in wants to do.  So Debian distributes a PIC compiled
dnl version of the static lib for plug-ins to link to when it is
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dnl inappropriate to link the main application to libXv directly.
dnl FIXME: add check if this platform can support linking to a
dnl        non-PIC libXv, if not then don not use Xv.
dnl FIXME: perhaps warn user if they have a shared libXv since
dnl        this is an error until XFree86 starts shipping one
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dnl Check for Xv extension
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translit(dnm, m, l) AM_CONDITIONAL(USE_XVIDEO, true)
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GST_CHECK_FEATURE(XVIDEO, [X11 XVideo extensions],
                  [xvimagesink xvideosink], [
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  if test x$HAVE_X = xyes; then
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    AC_CHECK_LIB(Xv_pic, XvQueryExtension,
		 HAVE_XVIDEO="yes", HAVE_XVIDEO="no",
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		 $X_LIBS -lXext)
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    if test x$HAVE_XVIDEO = xyes; then
      XVIDEO_LIBS="-lXv_pic -lXext"
      AC_SUBST(XVIDEO_LIBS)
    else
      dnl try again using something else if we didn't find it first
      if test x$HAVE_XVIDEO = xno; then
        AC_CHECK_LIB(Xv, XvQueryExtension,
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		   HAVE_XVIDEO="yes", HAVE_XVIDEO="no",
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		   $X_LIBS -lXext)
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        if test x$HAVE_XVIDEO = xyes; then
          XVIDEO_LIBS="-lXv -lXext"
          AC_SUBST(XVIDEO_LIBS)
        fi
      fi
    fi
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  fi
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])
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dnl check for X Shm
translit(dnm, m, l) AM_CONDITIONAL(USE_XSHM, true)
GST_CHECK_FEATURE(XSHM, [X Shared Memory extension], xshm, [
  if test x$HAVE_X = xyes; then
    AC_CHECK_LIB(Xext, XShmAttach, 
		 HAVE_XSHM="yes", HAVE_XSHM="no",
		 $X_LIBS) 
    if test "x$HAVE_XSHM" = "xyes"; then
      XSHM_LIBS="-lXext"
    else
      dnl On AIX, it is in XextSam instead, but we still need -lXext
      AC_CHECK_LIB(XextSam, XShmAttach, 
		   HAVE_XSHM="yes", HAVE_XSHM="no",
		   $X_LIBS) 
      if test "x$HAVE_XSHM" = "xyes"; then
	XSHM_LIBS="-lXext -lXextSam"
      fi
    fi
  fi
], , [ 
  AC_SUBST(HAVE_XSHM) 
  AC_SUBST(XSHM_LIBS) 
] )
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dnl v4l/v4l2 checks have been moved down because they require X

dnl *** Video 4 Linux ***
dnl for information about the header/define, see sys/v4l/gstv4lelement.h
translit(dnm, m, l) AM_CONDITIONAL(USE_V4L, true)
GST_CHECK_FEATURE(V4L, [Video 4 Linux], v4lsrc v4lmjpegsrc v4lmjpegsink, [
  # first check X
  HAVE_V4L="no"
  if test "$HAVE_X" == "yes"
  then
    AC_CHECK_DECL(VID_TYPE_MPEG_ENCODER, HAVE_V4L="yes", HAVE_V4L="no", [
#include <sys/types.h>
#define _LINUX_TIME_H
#include <linux/videodev.h>
    ])
  fi
])

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dnl *** Video 4 Linux 2 ***
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dnl for information about the header/define, see sys/v4l2/gstv4l2element.h
translit(dnm, m, l) AM_CONDITIONAL(USE_V4L2, true)
GST_CHECK_FEATURE(V4L2, [Video 4 Linux 2], v4l2src, [
  HAVE_V4L2="no"
  if test "$HAVE_X" == "yes"
  then
    AC_MSG_CHECKING([Checking for uptodate v4l2 installation])
    AC_TRY_COMPILE([
#include <sys/types.h>
#include <linux/types.h>
#define _LINUX_TIME_H
#include <linux/videodev2.h>
#if defined(V4L2_MAJOR_VERSION) || defined(V4L2_MINOR_VERSION)
#error too early v4l2 version or no v4l2 at all
#endif
    ], [
return 0;
    ], [ HAVE_V4L2="yes" && AC_MSG_RESULT(yes)],
       [ HAVE_V4L2="no"  && AC_MSG_RESULT(no) &&
         AC_CHECK_HEADER(linux/videodev2.h,
                         [ AC_MSG_WARN([video4linux2 headers were found, but they're old. Please update v4l2 to compile the v4l2 plugins])],
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                         [ AC_MSG_WARN([video4linux2 was not found])])
       ])
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  fi
])

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dnl Next, check for the optional libraries:
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dnl These are all libraries used in building plug-ins
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dnl ================================================
dnl let's try and sort them alphabetically, shall we ?

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if test "x$BUILD_EXTERNAL" = "xyes"; then

AC_MSG_NOTICE(Checking for plug-in dependency libraries)
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dnl *** a52dec ***
translit(dnm, m, l) AM_CONDITIONAL(USE_A52DEC, true)
GST_CHECK_FEATURE(A52DEC, [a52dec], a52dec, [
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  AC_CHECK_A52DEC(HAVE_A52DEC=yes, HAVE_A52DEC=no)
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])

dnl *** aalib ***
translit(dnm, m, l) AM_CONDITIONAL(USE_AALIB, true)
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GST_CHECK_FEATURE(AALIB, [aasink plug-in], aasink, [
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  AM_PATH_AALIB(, HAVE_AALIB=yes, HAVE_AALIB=no)
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  AS_SCRUB_INCLUDE(AALIB_CFLAGS)
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])

dnl *** alsa ***
translit(dnm, m, l) AM_CONDITIONAL(USE_ALSA, true)
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GST_CHECK_FEATURE(ALSA, [alsa plug-ins], gstalsa, [
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   AM_PATH_ALSA(0.9.1, HAVE_ALSA=yes, HAVE_ALSA=no)
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])

dnl *** arts ***
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dnl if mcopidl can't be found there's no use in compiling it
AC_CHECK_PROG(MCOPIDL, mcopidl, yes, no)
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if test "x$HAVE_MCOPIDL" = "xno";
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then
  USE_ARTS=no
fi

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translit(dnm, m, l) AM_CONDITIONAL(USE_ARTS, true)
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GST_CHECK_FEATURE(ARTS, [arts plug-ins], arts, [
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  AM_PATH_ARTS(, HAVE_ARTS=yes, HAVE_ARTS=no)
])
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dnl *** artsc ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_ARTSC, true)
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GST_CHECK_FEATURE(ARTSC, [artsd plug-ins], artsdsink, [
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  GST_CHECK_ARTSC()
])
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dnl *** audiofile ***
dnl this check uses the GST_CHECK_CONFIGPROG macro
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translit(dnm, m, l) AM_CONDITIONAL(USE_AUDIOFILE, true)
GST_CHECK_FEATURE(AUDIOFILE, [audiofile], afsink afsrc, [
  translit(dnm, m, l) AC_SUBST(AUDIOFILE_LIBS)
  translit(dnm, m, l) AC_SUBST(AUDIOFILE_CFLAGS)
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  dnl check with pkg-config first
  PKG_CHECK_MODULES(AUDIOFILE, audiofile, HAVE_AUDIOFILE="yes", HAVE_AUDIOFILE="no")
  if test "x$HAVE_AUDIOFILE" = "xno"; then
    GST_CHECK_CONFIGPROG(AUDIOFILE, audiofile-config)
    dnl we need this function
    AC_CHECK_LIB(audiofile, afOpenVirtualFile, , HAVE_AUDIOFILE="no")
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  fi])
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dnl *** CDParanoia ***
translit(dnm, m, l) AM_CONDITIONAL(USE_CDPARANOIA, true)
GST_CHECK_FEATURE(CDPARANOIA, [CDParanoia], cdparanoia, [
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  GST_CHECK_LIBHEADER(CDPARANOIA, cdda_interface, 
                      cdda_open, -lm, 
                      cdda_interface.h, 
                      CDPARANOIA_LIBS="-lcdda_interface -lcdda_paranoia"
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                      HEADER_DIR="no"
                      FOUND_CDPARANOIA="yes")
  if test "x$FOUND_CDPARANOIA" != "xyes";
  then
    GST_CHECK_LIBHEADER(CDPARANOIA, cdda_interface, 
                        cdda_open, -lm, 
                        cdda/cdda_interface.h, 
                        CDPARANOIA_LIBS="-lcdda_interface -lcdda_paranoia"
                        HEADER_DIR="yes"
                        FOUND_CDPARANOIA="yes")
  fi
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  if test "x$HEADER_DIR" = "xyes";
  then
    AC_DEFINE_UNQUOTED(CDPARANOIA_HEADERS_IN_DIR, ,
                       defined if cdda headers are in a cdda/ directory)
  fi
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  AC_SUBST(CDPARANOIA_LIBS)
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])
dnl FIXME : add second check somehow if that is necessary
dnl AC_CHECK_LIB(cdda_paranoia, paranoia_init, : , HAVE_CDPARANOIA=no, -lcdda_interface )
dnl AC_CHECK_HEADER(cdda_paranoia.h, :, HAVE_CDPARANOIA=no)

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dnl *** DIVX ***
translit(dnm, m, l) AM_CONDITIONAL(USE_DIVX, true)
GST_CHECK_FEATURE(DIVX, [divx plugins], divx, [
  HAVE_DIVX=yes
  AC_CHECK_HEADER(encore2.h, ,
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                  [ AC_MSG_WARN([Divx4linux encore headers not found]) &&
                    HAVE_DIVX=no ] )
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  if [ test x$HAVE_DIVX = xyes ]; then
    AC_MSG_CHECKING([Checking for valid divx4linux encore version])
    AC_TRY_COMPILE([
#include <encore2.h>
#if ENCORE_VERSION != 20021024
#error Wrong version of divx encore libraries
#endif
    ], [
return 0;
    ], [ HAVE_DIVX=yes && AC_MSG_RESULT(yes)],
       [ HAVE_DIVX=no  && AC_MSG_RESULT(no) &&
         AC_MSG_WARN([Wrong version of divx4linux installed]) ])
  fi
  if [ test x$HAVE_DIVX = xyes ]; then
    AC_CHECK_HEADER(decore.h, ,
                    [ AC_MSG_WARN([Divx4linux decoder headers not found]) &&
                      HAVE_DIVX=no ] )
  fi
  if [ test x$HAVE_DIVX = xyes ]; then
    AC_MSG_CHECKING([Checking for valid divx4linux decore version])
    AC_TRY_COMPILE([
#include <decore.h>
#if DECORE_VERSION != 20021112
#error Wrong version of divx decore libraries
#endif
    ], [
return 0;
    ], [ HAVE_DIVX=yes && AC_MSG_RESULT(yes)],
       [ HAVE_DIVX=no  && AC_MSG_RESULT(no) &&
         AC_MSG_WARN([Wrong version of divx4linux installed]) ])
  fi
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  LIBS="-lm"
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  if test x$HAVE_DIVX = xyes; then
    AC_CHECK_LIB(divxencore, encore, ,
                 [ AC_MSG_WARN([Divx4linux encore libs not found]) &&
                   HAVE_DIVX=no ] )
  fi
  if test x$HAVE_DIVX = xyes; then
    AC_CHECK_LIB(divxdecore, decore, ,
                 [ AC_MSG_WARN([Divx4linux decore libs not found]) &&
                   HAVE_DIVX=no ] )
  fi
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  if test x$HAVE_DIVX = xyes; then
    DIVXENC_LIBS="-ldivxencore -lm"
    DIVXDEC_LIBS="-ldivxdecore -lm"
    AC_SUBST(DIVXENC_LIBS)
    AC_SUBST(DIVXDEC_LIBS)
  fi
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])

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dnl *** dvdread ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_DVDREAD, true)
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GST_CHECK_FEATURE(DVDREAD, [dvdread library], dvdreadsrc, [
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  GST_CHECK_LIBHEADER(DVDREAD, dvdread, DVDOpen, , dvdread/dvd_reader.h, DVDREAD_LIBS="-ldvdread")
  AC_SUBST(DVDREAD_LIBS)
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])

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dnl *** dvdnav ***
translit(dnm, m, l) AM_CONDITIONAL(USE_DVDNAV, true)
GST_CHECK_FEATURE(DVDNAV, [dvdnav library], dvdnavsrc, [
  translit(dnm, m, l) AC_SUBST(DVDNAV_LIBS)
  translit(dnm, m, l) AC_SUBST(DVDNAV_CFLAGS)
  GST_CHECK_CONFIGPROG(DVDNAV, dvdnav-config)
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  if test x"$HAVE_DVDNAV" = x"yes"; then
    dnl check version
    DVDNAV_VERSION=`dvdnav-config --version|head -n 1|sed 's/^.*) //'|sed 's/ (.*)//'`
    DVDNAV_MAJOR=`echo $DVDNAV_VERSION | cut -d. -f1 | sed s/[a-zA-Z\-].*//g`
    DVDNAV_MINOR=`echo $DVDNAV_VERSION | cut -d. -f2 | sed s/[a-zA-Z\-].*//g`
    DVDNAV_MICRO=`echo $DVDNAV_VERSION | cut -d. -f3 | sed s/[a-zA-Z\-].*//g`
    if [[ "$DVDNAV_MAJOR" -eq "0" ]] && \
       [[ "$DVDNAV_MINOR" -lt "1" ]]; then
      AC_MSG_WARN([libdvdnav >= 0.1.7 is required, you have $DVDNAV_VERSION])
      HAVE_DVDNAV="no"
    elif [[ "$DVDNAV_MAJOR" -eq "0" ]] && \
         [[ "$DVDNAV_MINOR" -eq "1" ]] && \
         [[ "$DVDNAV_MICRO" -lt "7" ]]; then
      AC_MSG_WARN([libdvdnav >= 0.1.7 is required, you have $DVDNAV_VERSION])
      HAVE_DVDNAV="no"
      fi
    fi
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  AS_SCRUB_INCLUDE(DVDNAV_CFLAGS)
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])

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dnl *** MAS ***
translit(dnm, m, l) AM_CONDITIONAL(USE_MAS, true)
GST_CHECK_FEATURE(MAS, [mas library], massink, [
  translit(dnm, m, l) AC_SUBST(MAS_LIBS)
  translit(dnm, m, l) AC_SUBST(MAS_CFLAGS)
  GST_CHECK_CONFIGPROG(MAS, mas-config)
  AS_SCRUB_INCLUDE(MAS_CFLAGS)
])

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dnl **** ESound ****
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translit(dnm, m, l) AM_CONDITIONAL(USE_ESD, true)
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GST_CHECK_FEATURE(ESD, [esound plug-ins], esdsink esdmon, [
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  AM_PATH_ESD(0.2.12, HAVE_ESD=yes, HAVE_ESD=no)
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  AS_SCRUB_INCLUDE(ESD_CFLAGS)
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])

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dnl **** Free AAC Encoder (FAAC) ****
translit(dnm, m, l) AM_CONDITIONAL(USE_FAAC, true)
GST_CHECK_FEATURE(FAAC, [AAC encoder plug-in], faac, [
  GST_CHECK_LIBHEADER(FAAC, faac, faacEncOpen, -lm, faac.h, FAAC_LIBS="-lfaac -lm")
  AS_SCRUB_INCLUDE(FAAC_CFLAGS)
  AC_SUBST(FAAC_LIBS)
])

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dnl **** Free AAC Decoder (FAAD) ****
translit(dnm, m, l) AM_CONDITIONAL(USE_FAAD, true)
GST_CHECK_FEATURE(FAAD, [AAC decoder plug-in], faad, [
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  GST_CHECK_LIBHEADER(FAAD, faad, faacDecOpen, -lm, faad.h, FAAD_LIBS="-lfaad -lm")
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  AC_MSG_CHECKING([Checking for FAAD >= 2])
  AC_TRY_COMPILE([
#include <faad.h>
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#if !defined(FAAD2_VERSION) || !defined(FAAD_FMT_DOUBLE)
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#error Not faad2
#endif
  ], [ return 0; ],
     [ HAVE_FAAD="yes" && AC_MSG_RESULT(yes)],
     [ HAVE_FAAD="no"  && AC_MSG_RESULT(no)])
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  AS_SCRUB_INCLUDE(FAAD_CFLAGS)
  AC_SUBST(FAAD_LIBS)
])

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dnl **** festival ****
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dnl translit(dnm, m, l) AM_CONDITIONAL(USE_FESTIVAL, true)
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dnl GST_CHECK_FEATURE(FESTIVAL, [festival plug-ins], festivalsrc, [
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  dnl NOTE: just using local net connection now, add this lib check
  dnl       in the future if needed
  dnl AC_LANG_PUSH(C++)
  dnl dnl FIXME: took out func to check for
  dnl dnl This check puts festival_tidy_up in extern "C".
  dnl dnl But, at least on Debian as of 20020110, it is compiled with name
  dnl dnl mangling C++ nonsense and symbols can't resolve
  dnl dnl GST_CHECK_LIBHEADER(FESTIVAL, Festival, festival_tidy_up, , festival/festival.h, FESTIVAL_LIBS="-lFestival")
  dnl GST_CHECK_LIBHEADER(FESTIVAL, Festival, , , festival/festival.h, FESTIVAL_LIBS="-lFestival")
  dnl AC_LANG_POP(C++)
  dnl AC_SUBST(FESTIVAL_LIBS)
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dnl  HAVE_FESTIVAL=yes
dnl])
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dnl *** FLAC ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_FLAC, true)
GST_CHECK_FEATURE(FLAC, [FLAC lossless audio], flacenc flacdec, [
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  GST_CHECK_LIBHEADER(FLAC, FLAC, FLAC__seekable_stream_encoder_new, -lm, FLAC/all.h, FLAC_LIBS="-lFLAC")
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  AC_SUBST(FLAC_LIBS)
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])

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dnl *** FFMPEG ***
translit(dnm, m, l) AM_CONDITIONAL(USE_FFMPEG, true)
GST_CHECK_FEATURE(FFMPEG, [ffmpeg plug-ins], ffmpeg, [
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  # only slurp in the case where we are in CVS mode;
  # prerelease and release should get it disted
  if test "x$GST_PLUGINS_VERSION_NANO" = x1; then
    AC_MSG_NOTICE(slurping FFmpeg CVS source)
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    AS_SLURP_FFMPEG(gst-libs/ext/ffmpeg, 2003-10-26 10:00 GMT,
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                    HAVE_FFMPEG=yes, HAVE_FFMPEG=no)
  else
    AC_MSG_NOTICE(FFmpeg CVS code should be included already)
    HAVE_FFMPEG=yes
  fi
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  # we only bother with uninstalled (included) ffmpeg for now
  AC_DEFINE_UNQUOTED(HAVE_FFMPEG_UNINSTALLED, 1,
                     [defined if we use uninstalled ffmpeg])
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dnl *** GDK pixbuf ***
translit(dnm, m, l) AM_CONDITIONAL(USE_GDK_PIXBUF, true)
GST_CHECK_FEATURE(GDK_PIXBUF, [GDK pixbuf], gdkpixbufsrc, [
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dnl *** Gnome VFS ***
translit(dnm, m, l) AM_CONDITIONAL(USE_GNOME_VFS, true)
GST_CHECK_FEATURE(GNOME_VFS, [Gnome VFS], gnomevfssrc, [
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  PKG_CHECK_MODULES(GNOME_VFS, gnome-vfs-2.0, HAVE_GNOME_VFS="yes", HAVE_GNOME_VFS="no")
  AC_SUBST(GNOME_VFS_CFLAGS)
  AC_SUBST(GNOME_VFS_LIBS)
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])

dnl *** gsm ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_GSM, true)
GST_CHECK_FEATURE(GSM, [GSM library], gsmenc gsmdec, [
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  GST_CHECK_LIBHEADER(GSM, gsm, gsm_create, , gsm.h, GSM_LIBS="-lgsm")
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  if test $HAVE_GSM != "yes"; then
    GST_CHECK_LIBHEADER(GSM, gsm, gsm_create, , gsm/gsm.h, GSM_LIBS="-lgsm")
    if test $HAVE_GSM = "yes"; then 
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      AC_DEFINE(GSM_HEADER_IN_SUBDIR, 1, [Define if GSM header in gsm/ subdir])
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    fi
  fi
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  AC_SUBST(GSM_LIBS)
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])

dnl *** Hermes ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_HERMES, true)
GST_CHECK_FEATURE(HERMES, [Hermes library], colorspace, [
  GST_CHECK_LIBHEADER(HERMES, Hermes, Hermes_ConverterInstance, , Hermes/Hermes.h, HERMES_LIBS="-lHermes")
], AC_SUBST(HERMES_LIBS))
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dnl *** http ***
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dnl translit(dnm, m, l) AM_CONDITIONAL(USE_HTTP, true)
dnl GST_CHECK_FEATURE(HTTP, [http plug-ins], gsthttpsrc, [
dnl  dnl FIXME: need to check for header
dnl  GHTTP_LIBS=
dnl  GST_HTTPSRC_GET_TYPE=
dnl  if test x$USE_GLIB2 = xyes; then
dnl    AC_MSG_WARN(ghttp disabled for glib2.0)
dnl  else
dnl    AC_CHECK_LIB(ghttp, ghttp_request_new,
dnl      [HTTP_LIBS="-lghttp"
dnl       GST_HTTPSRC_GET_TYPE="gst_httpsrc_get_type"
dnl       HAVE_HTTP=yes
dnl      ], :, $LIBS)
dnl  fi
dnl  AC_SUBST(HTTP_LIBS)
dnl  AC_SUBST(GST_HTTPSRC_GET_TYPE)
dnl ])
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dnl *** ivorbis ***
dnl AM_PATH_IVORBIS only takes two options
translit(dnm, m, l) AM_CONDITIONAL(USE_IVORBIS, true)
GST_CHECK_FEATURE(IVORBIS, [integer vorbis plug-in], ivorbisdec, [
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  IVORBIS_LIBS=
  IVORBIS_CFLAGS=
  AC_CHECK_LIB(vorbisidec, vorbis_block_init,
    [IVORBIS_LIBS=-lvorbisidec
     HAVE_IVORBIS=yes],
    HAVE_IVORBIS=no)
  AC_SUBST(IVORBIS_LIBS)
  AC_SUBST(IVORBIS_CFLAGS)
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])

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dnl *** Jack ***
translit(dnm, m, l) AM_CONDITIONAL(USE_JACK, true)
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GST_CHECK_FEATURE(JACK, Jack, jack, [
  PKG_CHECK_MODULES(JACK, jack >= 0.29.0, HAVE_JACK="yes", HAVE_JACK="no")
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  AC_SUBST(JACK_CFLAGS)
  AC_SUBST(JACK_LIBS)
])

dnl *** jpeg ***
dnl FIXME: we could use header checks here as well IMO
translit(dnm, m, l) AM_CONDITIONAL(USE_JPEG, true)
GST_CHECK_FEATURE(JPEG, [jpeg], jpegenc jpegdec, [
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  AC_ARG_WITH(jpeg-mmx,
    [  --with-jpeg-mmx, path to MMX'ified JPEG library])
  OLD_LIBS="$LIBS"
  if test x$with_jpeg_mmx != x; then
    LIBS="$LIBS -L$with_jpeg_mmx"
  fi
  AC_CHECK_LIB(jpeg-mmx, jpeg_set_defaults, HAVE_JPEG="yes", HAVE_JPEG="no")
  JPEG_LIBS="$LIBS -ljpeg-mmx"
  LIBS="$OLD_LIBS"
  if test x$HAVE_JPEG != xyes; then
    AC_CHECK_LIB(jpeg, jpeg_set_defaults, HAVE_JPEG="yes", HAVE_JPEG="no")
    JPEG_LIBS="-ljpeg"
  fi
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  AC_SUBST(JPEG_LIBS)
])

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dnl *** ladspa ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LADSPA, true)
GST_CHECK_FEATURE(LADSPA, [ladspa], ladspa, [
  AC_CHECK_HEADER(ladspa.h, HAVE_LADSPA="yes", HAVE_LADSPA="no")
])

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dnl *** lame ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_LAME, true)
GST_CHECK_FEATURE(LAME, [lame mp3 encoder library], lame, [
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  GST_CHECK_LIBHEADER(LAME, mp3lame, lame_init, -lm, lame/lame.h, HAVE_LAME="yes" LAME_LIBS="-lmp3lame")
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])
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AC_SUBST(LAME_LIBS)
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dnl *** libcolorspace ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LCS, true)
GST_CHECK_FEATURE(LCS, Lcs, lcs, [
  PKG_CHECK_MODULES(LCS, lcs, HAVE_LCS="yes", HAVE_LCS="no")
  AC_SUBST(LCS_CFLAGS)
  AC_SUBST(LCS_LIBS)
])

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dnl *** libdv ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBDV, true)
GST_CHECK_FEATURE(LIBDV, [libdv DV/video decoder], dvdec, [
  PKG_CHECK_MODULES(LIBDV, libdv >= 0.98, HAVE_LIBDV="yes", HAVE_LIBDV="no")
  AC_SUBST(LIBDV_CFLAGS)
  AC_SUBST(LIBDV_LIBS)
])

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dnl *** libcaca ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBCACA, true)
GST_CHECK_FEATURE(LIBCACA, [libcaca], libcaca, [
  GST_CHECK_CONFIGPROG(LIBCACA, caca-config)
  AC_SUBST(LIBCACA_CFLAGS)
  AC_SUBST(LIBCACA_LIBS)
])

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dnl *** libfame ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBFAME, true)
GST_CHECK_FEATURE(LIBFAME, [libfame MPEG1/4 encoder], libfame, [
  AM_PATH_LIBFAME(0.9.0, HAVE_LIBFAME="yes", HAVE_LIBFAME="no")
  AC_SUBST(LIBFAME_CFLAGS)
  AC_SUBST(LIBFAME_LIBS)
])

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dnl *** libpng ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBPNG, true)
GST_CHECK_FEATURE(LIBPNG, [libpng PNG encoder], pngenc, [
  PKG_CHECK_MODULES(LIBPNG, libpng12, HAVE_LIBPNG="yes", HAVE_LIBPNG="no")
  AC_SUBST(LIBPNG_CFLAGS)
  AC_SUBST(LIBPNG_LIBS)
])

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dnl *** librfb ***
translit(dnm, m, l) AM_CONDITIONAL(USE_LIBRFB, true)
GST_CHECK_FEATURE(LIBRFB, [librfb Remote Framebuffer], rfbsrc, [
  PKG_CHECK_MODULES(LIBRFB, librfb-0.1, HAVE_LIBRFB="yes", HAVE_LIBRFB="no")
  AC_SUBST(LIBRFB_CFLAGS)
  AC_SUBST(LIBRFB_LIBS)
])
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dnl *** mad ***
dnl FIXME: we could use header checks here as well IMO
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translit(dnm, m, l) AM_CONDITIONAL(USE_MAD, true)
GST_CHECK_FEATURE(MAD, [mad mp3 decoder], mad, [
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  dnl check with pkg-config first
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  PKG_CHECK_MODULES(MAD, mad >= 0.15 id3tag >= 0.15, HAVE_MAD="yes", HAVE_MAD="no")
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  if test "x$HAVE_MAD" = "xno"; then
    dnl fall back to oldskool detection
    AC_CHECK_LIB(mad, mad_decoder_finish, HAVE_MAD="yes" MAD_LIBS="-lmad")
    if test "x$HAVE_MAD" = "xyes"; then
      HAVE_MAD="no"
      save_libs=$LIBS
      LIBS="-lz"
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      AC_CHECK_LIB(id3tag, id3_tag_options, HAVE_MAD="yes" MAD_LIBS="-lmad -lid3tag -lz")
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      LIBS=$save_LIBS
    fi
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  fi    
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])
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AC_SUBST(MAD_LIBS)
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dnl *** mikmod ***
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translit(dnm, m, l) AM_CONDITIONAL(USE_MIKMOD, true)
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GST_CHECK_FEATURE(MIKMOD, [mikmod plug-in], mikmod, [
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  AM_PATH_LIBMIKMOD(, HAVE_MIKMOD=yes, HAVE_MIKMOD=no)
  AC_SUBST(MIKMOD_LIBS, "$LIBMIKMOD_LIBS")
  AC_SUBST(MIKMOD_CFLAGS, "$LIBMIKMODCFLAGS")
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])

dnl *** mpeg2dec ***
translit(dnm, m, l) AM_CONDITIONAL(USE_MPEG2DEC, true)
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GST_CHECK_FEATURE(MPEG2DEC, [mpeg2dec], mpeg2dec, [
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  PKG_CHECK_MODULES(MPEG2DEC, libmpeg2 >= 0.3.1,
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      HAVE_MPEG2DEC="yes", HAVE_MPEG2DEC="no")
  AC_SUBST(MPEG2DEC_CFLAGS)
  AC_SUBST(MPEG2DEC_LIBS)
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])
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dnl *** mpeg2enc ***
translit(dnm, m, l) AM_CONDITIONAL(USE_MPEG2ENC, true)
GST_CHECK_FEATURE(MPEG2ENC, [mpeg2enc], mpeg2enc, [
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  HAVE_MPEG2ENC="no"
  dnl we require a c++ compiler for this one
  if [ test x$HAVE_CXX = xyes ]; then
    dnl libmpeg2enc was first included in mjpegtools-1.6.2-rc3 (1.6.1.92)
    dnl since many distros include mjpegtools specifically without mplex
    dnl and mpeg2enc, we check for mpeg2enc on its own, too.
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    PKG_CHECK_MODULES(MPEG2ENC, mjpegtools >= 1.6.1.93, [
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      dnl switch over to c++ to test things
      AC_LANG_CPLUSPLUS
      OLD_CPPFLAGS="$CPPFLAGS"
      CPPFLAGS="$CPPFLAGS $MPEG2ENC_CFLAGS"
      AC_CHECK_HEADER(mpeg2encoder.hh, [
        MPEG2ENC_LIBS="$MPEG2ENC_LIBS -lmpeg2encpp -lm -lpthread"
        OLD_LIBS="$LIBS"
        LIBS="$LIBS $MPEG2ENC_LIBS"
        AC_MSG_CHECKING([for valid mpeg2enc objects])
        AC_TRY_RUN([
#include <mpeg2encoder.hh>
#include <mpeg2encoptions.hh>

int
main (int   argc,
      char *argv[])
{
  MPEG2EncOptions *options = new MPEG2EncOptions ();
  MPEG2Encoder encoder (*options);
  return 0;
}
        ],[
          HAVE_MPEG2ENC="yes"
          AC_SUBST(MPEG2ENC_CFLAGS)
          AC_SUBST(MPEG2ENC_LIBS)
          AC_MSG_RESULT(yes)
        ], AC_MSG_RESULT(no))
        LIBS="$OLD_LIBS"
      ])
      CPPFLAGS="$OLD_CPPFLAGS"
      AC_LANG_C
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    ],
    HAVE_MPEG2ENC="no")
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  fi
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])

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dnl *** mplex ***
translit(dnm, m, l) AM_CONDITIONAL(USE_MPLEX, true)
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GST_CHECK_FEATURE(MPLEX, [mplex], mplex, [
  HAVE_MPLEX="no"
  dnl we require a c++ compiler for this one
  if [ test x$HAVE_CXX = xyes ]; then
    dnl libmplex was first included in mjpegtools-1.6.2-rc4 (1.6.1.93)
    dnl since many distros include mjpegtools specifically without mplex
    dnl and mpeg2enc, we check for mplex on its own, too.
    PKG_CHECK_MODULES(MPLEX, mjpegtools >= 1.6.1.93, [
      dnl switch over to c++ to test things
      AC_LANG_CPLUSPLUS
      OLD_CPPFLAGS="$CPPFLAGS"
      CPPFLAGS="$CPPFLAGS $MPLEX_CFLAGS"
      AC_CHECK_HEADER(interact.hpp, [
        MPLEX_LIBS="$MPLEX_LIBS -lmplex2 -lm"
        OLD_LIBS="$LIBS"
        LIBS="$LIBS $MPLEX_LIBS"
        AC_MSG_CHECKING([for valid mplex objects])
        AC_TRY_RUN([
#include <interact.hpp>
#include <outputstrm.hpp>
#include <multiplexor.hpp>

int
main (int   argc,
      char *argv[])
{
  class TestOutputStream : public OutputStream {
  public:
    TestOutputStream () : OutputStream () { }
    void Write (uint8_t *a, unsigned int b) { }
    void NextSegment () { }
    off_t SegmentSize () { }
    void Close () { }
    int Open () { }
  };
  MultiplexJob *job = new MultiplexJob ();
  vector<IBitStream *> inputs;
  job->SetupInputStreams (inputs);
  TestOutputStream *out = new TestOutputStream ();
  Multiplexor mux (*job, *out);
  return 0;
}
        ],[
          HAVE_MPLEX="yes"
          AC_SUBST(MPLEX_CFLAGS)
          AC_SUBST(MPLEX_LIBS)
          AC_MSG_RESULT(yes)
        ], AC_MSG_RESULT(no))
        LIBS="$OLD_LIBS"
      ])
      CPPFLAGS="$OLD_CPPFLAGS"
      AC_LANG_C
    ], HAVE_MPLEX="no")
  fi
])
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dnl *** musicbrainz ***
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dnl libmusicbrainz <= 2.0.2 has symbol clashes with ffmpeg
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translit(dnm, m, l) AM_CONDITIONAL(USE_MUSICBRAINZ, true)
GST_CHECK_FEATURE(MUSICBRAINZ, [musicbrainz], musicbrainz, [
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  PKG_CHECK_MODULES(MUSICBRAINZ, libmusicbrainz > 2.0.2,
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      HAVE_MUSICBRAINZ="yes", HAVE_MUSICBRAINZ="no")
  AC_SUBST(MUSICBRAINZ_CFLAGS)
  AC_SUBST(MUSICBRAINZ_LIBS)
])

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dnl *** nas ***
translit(dnm, m, l) AM_CONDITIONAL(USE_NAS, true)
GST_CHECK_FEATURE(NAS, [nas plug-in], nassink, [
  HAVE_NAS="no"
  if test "x$HAVE_X" = "xyes"; then
    save_cppflags=$CFLAGS
    CPPFLAGS="$CPPFLAGS $X_CFLAGS"
    GST_CHECK_LIBHEADER(NAS, audio, AuOpenServer, $X_LIBS, audio/audiolib.h,
      NAS_LIBS="$X_LIBS -laudio" NAS_CFLAGS="$X_CFLAGS")
    CPPFLAGS="$save_cppflags"
  fi
  AC_SUBST(NAS_CFLAGS)
  AC_SUBST(NAS_LIBS)
])

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dnl *** pango ***
translit(dnm, m, l) AM_CONDITIONAL(USE_PANGO, true)
GST_CHECK_FEATURE(PANGO, [pango], pango, [
  PKG_CHECK_MODULES(PANGO, pango pangoft2,
      HAVE_PANGO="yes", HAVE_PANGO="no")
  AC_SUBST(PANGO_CFLAGS)
  AC_SUBST(PANGO_LIBS)
])

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dnl *** raw1394 ***
translit(dnm, m, l) AM_CONDITIONAL(USE_RAW1394, true)
GST_CHECK_FEATURE(RAW1394, [raw1394 library], dv1394src, [