# Configure paths for libvorbis

# Jack Moffitt <jack@icecast.org> 10-21-2000

# Shamelessly stolen from Owen Taylor and Manish Singh

# thomasvs added check for vorbis_bitrate_addblock which is new in rc3

# thomasvs added check for OV_ECTL_RATEMANAGE_SET which is new in 1.0 final

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

dnl Test for libvorbis, and define VORBIS_CFLAGS and VORBIS_LIBS

dnl

AC_DEFUN([XIPH_PATH_VORBIS],

[dnl 

dnl Get the cflags and libraries

dnl

AC_ARG_WITH(vorbis,[  --with-vorbis=PFX   Prefix where libvorbis is installed (optional)], vorbis_prefix="$withval", vorbis_prefix="")

AC_ARG_WITH(vorbis-libraries,[  --with-vorbis-libraries=DIR   Directory where libvorbis library is installed (optional)], vorbis_libraries="$withval", vorbis_libraries="")

AC_ARG_WITH(vorbis-includes,[  --with-vorbis-includes=DIR   Directory where libvorbis header files are installed (optional)], vorbis_includes="$withval", vorbis_includes="")

AC_ARG_ENABLE(vorbistest, [  --disable-vorbistest       Do not try to compile and run a test Vorbis program],, enable_vorbistest=yes)

  if test "x$vorbis_libraries" != "x" ; then

    VORBIS_LIBS="-L$vorbis_libraries"

  elif test "x$vorbis_prefix" != "x" ; then

    VORBIS_LIBS="-L$vorbis_prefix/lib"

  elif test "x$prefix" != "xNONE"; then

    VORBIS_LIBS="-L$prefix/lib"

  fi

  VORBIS_LIBS="$VORBIS_LIBS -lvorbis -lm"

  VORBISFILE_LIBS="-lvorbisfile"

  VORBISENC_LIBS="-lvorbisenc"

  if test "x$vorbis_includes" != "x" ; then

    VORBIS_CFLAGS="-I$vorbis_includes"

  elif test "x$vorbis_prefix" != "x" ; then

    VORBIS_CFLAGS="-I$vorbis_prefix/include"

  elif test "x$prefix" != "xNONE"; then

    VORBIS_CFLAGS="-I$prefix/include"

  fi

  AC_MSG_CHECKING(for Vorbis)

  no_vorbis=""

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

    ac_save_CFLAGS="$CFLAGS"

    ac_save_LIBS="$LIBS"

    CFLAGS="$CFLAGS $VORBIS_CFLAGS $OGG_CFLAGS"

    LIBS="$LIBS $VORBIS_LIBS $VORBISENC_LIBS $OGG_LIBS"

dnl

dnl Now check if the installed Vorbis is sufficiently new.

dnl

      rm -f conf.vorbistest

      AC_TRY_RUN([

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <vorbis/codec.h>

#include <vorbis/vorbisenc.h>

int main ()

{

    vorbis_block 	vb;

    vorbis_dsp_state	vd;

    vorbis_info		vi;

    vorbis_info_init (&vi;;

    vorbis_encode_init (&vi, 2, 44100, -1, 128000, -1);

    vorbis_analysis_init (&vd, &vi;;

    vorbis_block_init (&vd, &vb;;

    /* this function was added in 1.0rc3, so this is what we're testing for */

    vorbis_bitrate_addblock (&vb;;

    /* this define was added in 1.0 final */

#ifdef OV_ECTL_RATEMANAGE_SET

    system("touch conf.vorbistest");

    return 0;

#else

    return -1;

#endif

}

],, no_vorbis=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])

       CFLAGS="$ac_save_CFLAGS"

       LIBS="$ac_save_LIBS"

  fi

  if test "x$no_vorbis" = "x" ; then

     AC_MSG_RESULT(yes)

     ifelse([$1], , :, [$1])     

  else

     AC_MSG_RESULT(no)

     if test -f conf.vorbistest ; then

       :

     else

       echo "*** Could not run Vorbis test program, checking why..."

       CFLAGS="$CFLAGS $VORBIS_CFLAGS"

       LIBS="$LIBS $VORBIS_LIBS $OGG_LIBS"

       AC_TRY_LINK([

#include <stdio.h>

#include <vorbis/codec.h>

],     [ return 0; ],

       [ echo "*** The test program compiled, but did not run. This usually means"

       echo "*** that the run-time linker is not finding Vorbis or finding the wrong"

       echo "*** version of Vorbis. If it is not finding Vorbis, you'll need to set your"

       echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"

       echo "*** to the installed location  Also, make sure you have run ldconfig if that"

       echo "*** is required on your system"

       echo "***"

       echo "*** If you have an old version installed, it is best to remove it, although"

       echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"],

       [ echo "*** The test program failed to compile or link. See the file config.log for the"

       echo "*** exact error that occured. This usually means Vorbis was incorrectly installed"

       echo "*** or that you have moved Vorbis since it was installed." ])

       CFLAGS="$ac_save_CFLAGS"

       LIBS="$ac_save_LIBS"

     fi

     VORBIS_CFLAGS=""

     VORBIS_LIBS=""

     VORBISFILE_LIBS=""

     VORBISENC_LIBS=""

     ifelse([$2], , :, [$2])

  fi

  AC_SUBST(VORBIS_CFLAGS)

  AC_SUBST(VORBIS_LIBS)

  AC_SUBST(VORBISFILE_LIBS)

  AC_SUBST(VORBISENC_LIBS)

  rm -f conf.vorbistest

])