## Copyright (C) 1995-2011 John W. Eaton
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 3 of the License, or (at
## your option) any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, see
## <http://www.gnu.org/licenses/>.

## -*- texinfo -*-
## @deftypefn  {Function File} {} playaudio (@var{name}, @var{ext})
## @deftypefnx {Function File} {} playaudio (@var{x})
## Plays the audio file @file{@var{name}.@var{ext}} or the audio data
## stored in the vector @var{x}.
## @seealso{lin2mu, mu2lin, loadaudio, saveaudio, setaudio, record}
## @end deftypefn

## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
## Created: 11 April 1994
## Adapted-By: jwe

function playaudio (name, ext)

  if (nargin == 1 && isvector (name) && ! ischar (name))
    ## play a vector
    [nr, nc] = size (name);
    if (nc != 1)
      if (nr == 1)
        name = name';
        nr = nc;
      else
        error ("playaudio: X must be a vector");
      endif
    endif
    X = name + 127;
    unwind_protect
      file = tmpnam ();
      num = fopen (file, "wb");
      c = fwrite (num, X, "uchar");
      fclose (num);
      system (sprintf ("cat \"%s\" > /dev/dsp", file));
    unwind_protect_cleanup
      unlink (file);
    end_unwind_protect
  elseif (nargin >= 1 && ischar (name))
    ## play a file
    if (nargin == 1)
      name = [name, ".lin"];
    elseif (nargin == 2)
      name = [name, ".", ext];
    else
      print_usage ();
    endif
    if (strcmp (ext, "lin") || strcmp (ext, "raw"))
      system (sprintf ("cat \"%s\" > /dev/dsp", name));
    elseif (strcmp (ext, "mu") || strcmp (ext, "au")
            || strcmp (ext, "snd") || strcmp (ext, "ul"))
      system (sprintf ("cat \"%s\" > /dev/audio", name));
    else
      error ("playaudio: unsupported extension");
    endif
  else
    print_usage ();
  endif

endfunction