l4/pkg/ocaml/ocaml/contrib/otherlibs/graph/sound.c

   1 /***********************************************************************/
   2 /*                                                                     */
   3 /*                           Objective Caml                            */
   4 /*                                                                     */
   5 /*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         */
   6 /*                                                                     */
   7 /*  Copyright 1996 Institut National de Recherche en Informatique et   */
   8 /*  en Automatique.  All rights reserved.  This file is distributed    */
   9 /*  under the terms of the GNU Library General Public License, with    */
  10 /*  the special exception on linking described in file ../../LICENSE.  */
  11 /*                                                                     */
  12 /***********************************************************************/
  13
  14 /* $Id: sound.c 6171 2004-03-24 15:02:06Z starynke $ */
  15
  16 #include "libgraph.h"
  17
  18 value caml_gr_sound(value vfreq, value vdur)
  19 {
  20   XKeyboardControl kbdcontrol;
  21
  22   caml_gr_check_open();
  23   kbdcontrol.bell_pitch = Int_val(vfreq);
  24   kbdcontrol.bell_duration = Int_val(vdur);
  25   XChangeKeyboardControl(caml_gr_display, KBBellPitch | KBBellDuration,
  26                          &kbdcontrol);
  27   XBell(caml_gr_display, 0);
  28   kbdcontrol.bell_pitch = -1;   /* restore default value */
  29   kbdcontrol.bell_duration = -1; /* restore default value */
  30   XChangeKeyboardControl(caml_gr_display, KBBellPitch | KBBellDuration,
  31                          &kbdcontrol);
  32   XFlush(caml_gr_display);
  33   return Val_unit;
  34 }