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AC_PREREQ(2.62)
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dnl initialize autoconf
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dnl when going to/from release please set the nano (fourth number) right !
dnl releases only do Wall, cvs and prerelease does Werror too
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AC_INIT(GStreamer libav, 0.11.93.1,
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    http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer,
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    gst-libav)
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AG_GST_INIT

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dnl initialize automake
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AM_INIT_AUTOMAKE([-Wno-portability 1.11 no-dist-gzip dist-xz tar-ustar])
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dnl define PACKAGE_VERSION_* variables
AS_VERSION
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dnl check if this is a release version
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AS_NANO(GST_GIT="no", GST_GIT="yes")
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dnl can autoconf find the source ?
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AC_CONFIG_SRCDIR([ext/libav/gstav.c])
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dnl define the output header for config
AM_CONFIG_HEADER([config.h])

dnl AM_MAINTAINER_MODE only provides the option to configure to enable it
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AM_MAINTAINER_MODE([enable])
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dnl sets host_* variables
AC_CANONICAL_HOST
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dnl use pretty build output with automake >= 1.11
m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],
  [AM_DEFAULT_VERBOSITY=1
   AC_SUBST(AM_DEFAULT_VERBOSITY)])

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dnl our libraries and install dirs use major.minor as a version
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GST_API_VERSION=$PACKAGE_VERSION_MAJOR.$PACKAGE_VERSION_MINOR
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dnl we override it here if we need to for the release candidate of new series
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GST_API_VERSION=1.0
AC_SUBST(GST_API_VERSION)
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AG_GST_LIBTOOL_PREPARE
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AS_LIBTOOL(GST, 0, 0, 0)
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dnl *** required versions of GStreamer stuff ***
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GST_REQ=0.11.93
ORC_REQ=0.4.16
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dnl *** autotools stuff ****

dnl allow for different autotools
AS_AUTOTOOLS_ALTERNATE
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dnl Add parameters for aclocal
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AC_SUBST(ACLOCAL_AMFLAGS, "-I m4 -I common/m4")

dnl *** check for arguments to configure ***

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AG_GST_ARG_DISABLE_FATAL_WARNINGS

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AG_GST_ARG_WITH_PKG_CONFIG_PATH
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AG_GST_ARG_WITH_PACKAGE_NAME
AG_GST_ARG_WITH_PACKAGE_ORIGIN
AG_GST_ARG_VALGRIND
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dnl *** checks for platform ***

dnl * hardware/architecture *

dnl common/m4/gst-arch.m4
dnl check CPU type
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AG_GST_ARCH
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dnl *** checks for programs ***
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dnl find a compiler
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AC_PROG_CC
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AC_PROG_CC_STDC
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dnl check if the compiler supports '-c' and '-o' options
AM_PROG_CC_C_O

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AC_PATH_PROG(VALGRIND_PATH, valgrind, no)
AM_CONDITIONAL(HAVE_VALGRIND, test ! "x$VALGRIND_PATH" = "xno")

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dnl check for documentation tools
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AG_GST_DOCBOOK_CHECK
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GTK_DOC_CHECK([1.12])
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AS_PATH_PYTHON([2.1])
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AG_GST_PLUGIN_DOCS([1.3],[2.1])
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dnl *** checks for libraries ***
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dnl check for libm, for sin()
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LT_LIB_M
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AC_SUBST(LIBM)

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dnl *** checks for header files ***
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dnl check if we have ANSI C header files
AC_HEADER_STDC
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dnl *** checks for types/defines ***
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dnl *** checks for structures ***

dnl *** checks for compiler characteristics ***

dnl *** checks for library functions ***

dnl *** checks for dependancy libraries ***

dnl checks for gstreamer
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dnl uninstalled is selected preferentially -- see pkg-config(1)
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AG_GST_CHECK_GST($GST_API_VERSION, [$GST_REQ])
AG_GST_CHECK_GST_BASE($GST_API_VERSION, [$GST_REQ])
AG_GST_CHECK_GST_PLUGINS_BASE($GST_API_VERSION, [$GST_REQ])
AG_GST_CHECK_GST_CHECK($GST_API_VERSION, [$GST_REQ], no)
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AM_CONDITIONAL(HAVE_GST_CHECK, test "x$HAVE_GST_CHECK" = "xyes")
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AC_MSG_NOTICE(Using GStreamer Core Plugins in $GST_PLUGINS_DIR)
AC_MSG_NOTICE(Using GStreamer Base Plugins in $GSTPB_PLUGINS_DIR)

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dnl *** set variables based on configure arguments ***

dnl set location of plugin directory
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AG_GST_SET_PLUGINDIR
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dnl define an ERROR_CFLAGS Makefile variable
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AG_GST_SET_ERROR_CFLAGS($FATAL_WARNINGS, [
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    -Wmissing-declarations -Wmissing-prototypes -Wredundant-decls -Wundef
    -Wwrite-strings -Wformat-nonliteral -Wformat-security -Wold-style-definition
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    -Winit-self -Wmissing-include-dirs -Waddress
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    -Waggregate-return -Wno-multichar -Wnested-externs ])
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dnl define correct level for debugging messages
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AG_GST_SET_LEVEL_DEFAULT($GST_GIT)
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dnl *** finalize CFLAGS, LDFLAGS, LIBS ***

dnl Overview:
dnl GST_OPTION_CFLAGS:  common flags for profiling, debugging, errors, ...
dnl GST_*:              flags shared by built objects to link against GStreamer
dnl GST_ALL_LDFLAGS:    linker flags shared by all
dnl GST_LIB_LDFLAGS:    additional linker flags for all libaries
dnl GST_LT_LDFLAGS:     library versioning of our libraries
dnl GST_PLUGIN_LDFLAGS: flags to be used for all plugins

dnl GST_OPTION_CFLAGS
if test "x$USE_DEBUG" = xyes; then
   PROFILE_CFLAGS="-g"
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fi
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AC_SUBST(PROFILE_CFLAGS)
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if test "x$GST_GIT" = "xyes"; then
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  DEPRECATED_CFLAGS="-DGST_DISABLE_DEPRECATED"
else
  DEPRECATED_CFLAGS=""
fi
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AC_SUBST(DEPRECATED_CFLAGS)
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dnl every flag in GST_OPTION_CFLAGS can be overridden at make time
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GST_OPTION_CFLAGS="\$(WARNING_CFLAGS) \$(ERROR_CFLAGS) \$(DEBUG_CFLAGS) \$(PROFILE_CFLAGS) \$(GCOV_CFLAGS) \$(OPT_CFLAGS) \$(DEPRECATED_CFLAGS)"
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AC_SUBST(GST_OPTION_CFLAGS)
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dnl FIXME: do we want to rename to GST_ALL_* ?
dnl prefer internal headers to already installed ones
dnl also add builddir include for enumtypes and marshal
dnl add GST_OPTION_CFLAGS, but overridable
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GST_CFLAGS="$GST_CFLAGS -DGST_USE_UNSTABLE_API"
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GST_CFLAGS="-I\$(top_srcdir)/gst-libs -I\$(top_builddir)/gst-libs $GST_CFLAGS $GLIB_EXTRA_CFLAGS \$(GST_OPTION_CFLAGS)"
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AC_SUBST(GST_CFLAGS)
AC_SUBST(GST_LIBS)
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GST_ALL_LDFLAGS="-no-undefined"
AC_SUBST(GST_ALL_LDFLAGS)

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dnl this really should only contain flags, not libs - they get added before
dnl whatevertarget_LIBS and -L flags here affect the rest of the linking
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GST_PLUGIN_LDFLAGS="-module -avoid-version -export-symbols-regex '^[_]*gst_plugin_desc.*' $GST_ALL_LDFLAGS"
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AC_SUBST(GST_PLUGIN_LDFLAGS)
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dnl Add MacOSX specific flags
AC_CANONICAL_HOST
case $host_os in
     darwin*)
	DARWIN_LDFLAGS="-Wl,-read_only_relocs,suppress"
	;;
     *)
        DARWIN_LDFLAGS=""
	;;
esac
AC_SUBST(DARWIN_LDFLAGS)

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dnl *** Check for bz2
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AG_GST_CHECK_LIBHEADER(BZ2, bz2, BZ2_bzlibVersion, , bzlib.h, have_bz2=yes, have_bz2=no)
AM_CONDITIONAL(HAVE_BZ2, test "x$have_bz2" = "xyes")
if test "x$have_bz2" = "xno"; then
  AC_WARN([libbz2 not found, matroska demuxer will not be able to read bz2 tracks])
fi
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AC_ARG_ENABLE(lgpl,
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              [AC_HELP_STRING([--enable-lgpl], [build a LGPL licensed gst-libav])])
AM_CONDITIONAL(GST_LIBAV_ENABLE_LGPL, test "x$enable_lgpl" = "xyes")
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if test "x$enable_lgpl" = "xyes"; then
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  AC_DEFINE([GST_LIBAV_ENABLE_LGPL], [], [Defined if building a LGPL-only version of gst-libav])
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fi

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dnl *** configure external libs ***
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HAVE_LIBAV_UNINSTALLED=1
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AC_ARG_WITH(system-libav,
            [AC_HELP_STRING([--with-system-libav], [use system Libav libraries])])
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if test "x$with_system_libav" = "xyes"; then
  PKG_CHECK_MODULES(LIBAV, libavformat libavcodec libavutil) 
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  PKG_CHECK_MODULES(SWSCALE, libswscale libavutil)
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  saved_CPPFLAGS="$CPPFLAGS"
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  CPPFLAGS="$CPPFLAGS $LIBAV_CFLAGS"
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  AC_CHECK_HEADERS([avi.h])
  CPPFLAGS="$saved_CPPFLAGS"
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  AC_DEFINE([LIBAV_SOURCE], ["system install"], [Describes where the Libav libraries come from.])
  HAVE_LIBAV_UNINSTALLED=0
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  AC_MSG_NOTICE([Using system-installed libav code])
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  AC_MSG_WARN([
  ======================================================================
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   WARNING: you have chosen to build gst-libav against a random
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   external version of Libav instead of building it against the tested
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   internal Libav snapshot that is included with gst-libav.
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   This is a very bad idea.  So bad in fact that words cannot express
   just how bad it is.  Suffice to say that it is BAD.
   
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   The GStreamer developers cannot and will not support a gst-libav
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   built this way.  Any bug reports that indicate there is an external
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   version of Libav involved will be closed immediately without further
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   investigation.
   
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   The reason such a setup can't be supported is that the Libav API
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   and ABI is in constant flux, yet there aren't any official releases
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   of the Libav library to develop against.  This makes it impossible
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   to guarantee that gst-libav will work reliably, or even compile,
   with a randomly picked version Libav.  Even if gst-libav compiles
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   and superficially appears to work fine against your chosen external
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   Libav version, that might just not be the case on other systems, or
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   even the same system at a later time, or when using decoders,
   encoders, demuxers or muxers that have not been tested.
   
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   Please do not create or distribute binary packages of gst-Libav
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   that link against an external libav. Thank you!
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  ======================================================================
  ])

  dnl No, this is not too extreme, we want people to see and read the above
  sleep 15
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else
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  AC_MSG_NOTICE([Using local Libav snapshot])
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  dnl libgstlibav.la: include dirs
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  LIBAV_CFLAGS="-I \$(top_srcdir)/gst-libs/ext/libav \
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                 -Wno-deprecated-declarations"
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  dnl libgstlibav.la: libs to statically link to        
  LIBAV_LIBS="\$(top_builddir)/gst-libs/ext/libav/libavformat/libavformat.a \
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               \$(top_builddir)/gst-libs/ext/libav/libavcodec/libavcodec.a \
               \$(top_builddir)/gst-libs/ext/libav/libavutil/libavutil.a"
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  dnl
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  SWSCALE_CFLAGS="-I \$(top_srcdir)/gst-libs/ext/libav \
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                  -Wno-deprecated-declarations"

  dnl libgstswscale.la: libs to statically link to
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  SWSCALE_LIBS="\$(top_builddir)/gst-libs/ext/libav/libswscale/libswscale.a \
                \$(top_builddir)/gst-libs/ext/libav/libavutil/libavutil.a"
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  LIBAV_SUBDIRS=gst-libs
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  AC_DEFINE(HAVE_AVI_H)
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  AC_DEFINE([LIBAV_SOURCE], ["local snapshot"], [Describes where the Libav libraries come from.])
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  AC_ARG_WITH(libav-extra-configure, 
      AC_HELP_STRING([--with-libav-extra-configure="xxx"],
      [extra configure options for internal libav ./configure script]),,
      with_libav=no)
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  # basic arguments
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  emblibav_configure_args="--prefix=$prefix"
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  # Enable pic and static so that we get .a files, but with PIC code.
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  emblibav_configure_args="$emblibav_configure_args --disable-avserver --disable-avplay\
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        --disable-avconv --disable-avprobe --enable-static --enable-pic \
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	--disable-encoder=flac --disable-decoder=cavs --disable-protocols --disable-devices\
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	--disable-network --disable-hwaccels --disable-filters --disable-doc\
	--enable-optimizations"
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  if test "x$enable_lgpl" != "xyes"; then
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    emblibav_configure_args="$emblibav_configure_args --enable-gpl"
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  fi

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  # if we are cross-compiling, tell libav so
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  target_os=`echo $host_os | sed 's/-gnu//'`
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  if test "x$cross_compiling" = xyes; then
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    emblibav_configure_args="$emblibav_configure_args --enable-cross-compile \
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        --target-os=$target_os --arch=$host_cpu --cross-prefix=$host_alias-"
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  fi

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  case $host_os in
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    # Unfortunately, in Mac OS 10.5 the current rev of libav builds
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    # some non-PIC code into the .a file. See
    # http://trac.macosforge.org/projects/macports/ticket/13725 for more
    # info.
    darwin*) 
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      emblibav_configure_args="$emblibav_configure_args --disable-mmx --disable-altivec"
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      ;;
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    mingw32*)
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      emblibav_configure_args="$emblibav_configure_args --enable-memalign-hack"
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      WIN32_LIBS="-lws2_32"
      ;;
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    *)
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      WIN32_LIBS=
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      ;;
  esac
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  dnl checks for extra enable/disable flags
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  LIBAV_OPTS="(cd $srcdir/gst-libs/ext/libav && ./configure --help)"
  # Let's check if we can disable the building of the libav binary
  can_disable=`echo "$LIBAV_OPTS" | grep 'disable-ffmpeg'`
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  if test "$can_disable" != ""; then
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    emblibav_configure_args="$emblibav_configure_args --disable-ffmpeg"
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  fi
  dnl check if libswscale needs enabling explicitly
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  can_enable=`echo "$LIBAV_OPTS" | grep 'enable-swscale'`
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  if test "$can_enable" != ""; then
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    emblibav_configure_args="$emblibav_configure_args --enable-swscale"
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  fi

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  # append extra configure options to emblibav_configure_args if needed
  if test "x$with_libav_extra_configure" != "xno"; then
    emblibav_configure_args="$emblibav_configure_args $with_libav_extra_configure"
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  fi

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  AC_SUBST(LIBAV_CO_DIR)
  AC_SUBST(LIBAV_SVN)
  AC_SUBST(LIBAV_REVISION)
  AC_SUBST(LIBAV_EXTERNALS_REVISION)
  AC_CONFIG_COMMANDS([configure-embedded-libav],
    [echo "Configuring included Libav instance with args $emblibav_configure_args"
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     origdir=`pwd`
     dnl Don't put path on the configure call when not needed, as FFmpeg's configure relies on it
     dnl to detect out-of-tree builds
     if test -z "$srcdir" -o "$srcdir" = .; then
       confcmd=./configure
     else
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       confcmd="$ac_abs_top_srcdir"/gst-libs/ext/libav/configure
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     fi

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     AS_MKDIR_P(["$ac_top_build_prefix"gst-libs/ext/libav])
     cd "$ac_top_build_prefix"gst-libs/ext/libav &&
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         eval "$confcmd $emblibav_configure_args" ||
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         AC_MSG_ERROR([Failed to configure embedded Libav tree])
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     cd "$origdir"
    ],
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    [emblibav_configure_args="$emblibav_configure_args"])
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  AC_MSG_NOTICE([Using included Libav code])
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fi
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AC_SUBST(LIBAV_CFLAGS)
AC_SUBST(LIBAV_LIBS)
AC_SUBST(LIBAV_SUBDIRS)
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AC_SUBST(SWSCALE_CFLAGS)
AC_SUBST(SWSCALE_LIBS)
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AC_SUBST(WIN32_LIBS)
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if test x$HAVE_LIBAV_UNINSTALLED = x1; then
  AC_DEFINE(HAVE_LIBAV_UNINSTALLED, [], [Defined if building against uninstalled Libav source])
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fi
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AM_CONDITIONAL(HAVE_LIBAV_UNINSTALLED, test x$HAVE_LIBAV_UNINSTALLED = x1)
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AC_CONFIG_FILES(
Makefile
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common/Makefile
common/m4/Makefile
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gst-libav.spec
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ext/Makefile
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ext/libav/Makefile
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ext/libswscale/Makefile
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gst-libs/Makefile
gst-libs/ext/Makefile
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docs/Makefile
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docs/version.entities
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tests/Makefile
tests/check/Makefile
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tests/files/Makefile
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)
AC_OUTPUT
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ORC_OUTPUT