shithub: sox

ref: ae4e7fe7d1f259058eea7e975ba1e5ac8569cf79
dir: /m4/sndfile.m4/

dnl SOX_PATH_SNDFILE
dnl Based off of shout.m4 from xiph package.
dnl cbagwell@users.sourceforge.net 1-3-2007
dnl
dnl Original Authors:
dnl Jack Moffitt <jack@icecast.org> 08-06-2001
dnl Rewritten for libshout 2
dnl Brendan Cully <brendan@xiph.org> 20030612
dnl
# SOX_PATH_SNDFILE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
# Test for libsndfile, and define SNDFILE_CFLAGS and SNDFILE_LIBS
AC_DEFUN([SOX_PATH_SNDFILE],
[dnl
# Step 1: Use pkg-config if available
m4_ifdef([PKG_CHECK_MODULES],
  [# PKG_CHECK_MODULES available
  PKG_CHECK_MODULES(SNDFILE, sndfile, have_sndfile="maybe", 
                    have_sndfile="no")],
  [# PKG_CHECK_MODULES is unavailable, search for pkg-config program
  AC_PATH_PROG([PKGCONFIG], [pkg-config], [none])
  if test "$PKGCONFIG" != "none" && `$PKGCONFIG --exists sndfile`
  then
    SNDFILE_CFLAGS=`$PKGCONFIG --cflags sndfile`
    SNDFILE_LIBS=`$PKGCONFIG --libs sndfile`
    have_sndfile="maybe"
  else
    if test "$PKGCONFIG" != "none"
    then
      AC_MSG_NOTICE([$PKGCONFIG couldn't find libsndfile. Try adjusting PKG_CONFIG_PATH.])
    fi
    # libsndfile doesn't have sndfile-config but other
    # packages do and so keep around as an example.
    # Step 2: try sndfile-config
    #AC_PATH_PROG([SNDFILECONFIG], [sndfile-config], [none])
    #if test "$SNDFILECONFIG" != "none" && test `$SNDFILECONFIG --package` = "libsndfile"
    #then
    #  SNDFILE_CFLAGS=`$SNDFILECONFIG --cflags`
    #  SNDFILE_LIBS=`$SNDFILECONFIG --libs`
    #  have_sndfile="maybe"
    #fi
  fi
  ])

# Now try actually using libsndfile
if test "$have_sndfile" != "no"
then
  ac_save_CFLAGS="$CFLAGS"
  ac_save_LIBS="$LIBS"
  CFLAGS="$CFLAGS $SNDFILE_CFLAGS"
  LIBS="$LIBS $SNDFILE_LIBS"
  AC_CHECK_HEADER([sndfile.h], [
    AC_DEFINE([HAVE_SNDFILE_H], 1, [Define if you have <sndfile.h>])
    AC_CHECK_FUNC([sf_open], [
      ifelse([$1], , :, [$1])
      have_sndfile="yes"
    ])
    AC_CHECK_FUNC([sf_open_virtual], AC_DEFINE([HAVE_SNDFILE_1_0_12], 1, [Define if you have libsndfile >= 1.0.12]))      
  ])
  CFLAGS="$ac_save_CFLAGS"
  LIBS="$ac_save_LIBS"
fi

if test "$have_sndfile" != "yes"
then
  ifelse([$2], , :, [$2])
fi
])dnl SOX_PATH_SNDFILE