# Configure paths for libtheora

# Karl Heyes 02-Feb-2004

dnl XIPH_PATH_THEORA([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])

dnl Test for libtheora, and define THEORA_CFLAGS THEORA_LIBS

dnl

AC_DEFUN([XIPH_PATH_THEORA],

[

AC_REQUIRE([XIPH_PATH_OGG])

dnl Get the cflags and libraries for theora

dnl

AC_ARG_VAR([THEORA],[path to theora installation])

AC_ARG_WITH(theora,

    AC_HELP_STRING([--with-theora=PREFIX],

        [Prefix where libtheora is installed (optional)]),

    theora_prefix="$withval",

    theora_prefix="$THEORA_PREFIX"

    )

if test "x$with_theora" = "xno"

then

  AC_MSG_RESULT([Theora support disabled by request])

else

  if test "x$theora_prefix" = "x" -o "x$theora_prefix" = "xyes"; then

    if test "x$prefix" = "xNONE"; then

        theora_prefix="/usr/local"

    else

        theora_prefix="$prefix"

    fi

  fi

  THEORA_CFLAGS="$OGG_CFLAGS"

  THEORA_LDFLAGS="$OGG_LDFLAGS"

  if test "x$theora_prefix" != "x$ogg_prefix"; then

      XIPH_GCC_WARNING(-I"$theora_prefix/include",,

              [THEORA_CFLAGS="$THEORA_CFLAGS -I$theora_prefix/include"

              THEORA_LDFLAGS="-L$theora_prefix/lib $THEORA_LDFLAGS"

              ])

  fi

  THEORA_LIBS="-ltheora -logg"

  ac_save_LIBS="$LIBS"

  ac_save_LDFLAGS="$LDFLAGS"

  LDFLAGS="$LDFLAGS $THEORA_LDFLAGS"

  LIBS="$LIBS $THEORA_LIBS"

  AC_MSG_CHECKING([for libtheora])

  AC_TRY_LINK_FUNC(theora_decode_header, [xt_have_theora="yes"],

          [xt_have_theora="Not found"])

  if test "x$xt_have_theora" = "xyes"

  then

    AC_TRY_LINK_FUNC(theora_packet_isheader, [xt_have_theora="yes"],

          [xt_have_theora="newer version required"])

  fi

  LIBS="$ac_save_LIBS"

  LDFLAGS="$ac_save_LDFLAGS"

  if test "x$xt_have_theora" = "xyes"

  then

    AC_MSG_RESULT([ok])

    AC_DEFINE([HAVE_THEORA],[1],[Define if Theora support is available])

    $1

  else

    THEORA_CFLAGS=""

    THEORA_LDFLAGS=""

    THEORA_LIBS=""

    AC_MSG_RESULT([$xt_have_theora])

    $2

  fi

fi

AC_SUBST(THEORA_CFLAGS)

AC_SUBST(THEORA_LDFLAGS)

AC_SUBST(THEORA_LIBS)

])