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annotate scripts/audio/playaudio.m @ 19840:c5270263d466 gui-release

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close gui-release branch
author John W. Eaton <jwe@octave.org>
date Fri, 30 Jan 2015 17:41:50 -0500
parents d63878346099
children 6ca096827123
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 1995-2013 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} playaudio (@var{name}, @var{ext})
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21 ## @deftypefnx {Function File} {} playaudio (@var{x})
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22 ## Play the audio file @file{@var{name}.@var{ext}} or the audio data
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23 ## stored in the vector @var{x}.
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24 ## @seealso{lin2mu, mu2lin, loadaudio, saveaudio, setaudio, record}
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25 ## @end deftypefn
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26
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27 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
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28 ## Created: 11 April 1994
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29 ## Adapted-By: jwe
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30
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31 function playaudio (name, ext)
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32
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33 if (nargin < 1 || nargin > 2)
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34 print_usage ();
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35 endif
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36
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37 if (nargin == 1 && isnumeric (name))
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38 ## play a vector
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39 if (! isvector (name))
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40 error ("playaudio: X must be a vector");
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41 endif
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42 X = name(:) + 127;
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43 unwind_protect
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44 file = tmpnam ();
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45 fid = fopen (file, "wb");
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46 fwrite (fid, X, "uchar");
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47 fclose (fid);
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48 [status, out] = system (sprintf ('cat "%s" > /dev/dsp', file));
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49 if (status != 0)
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50 system (sprintf ("paplay --raw \"%s\"", file));
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51 endif
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52 unwind_protect_cleanup
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53 unlink (file);
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54 end_unwind_protect
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55 elseif (nargin >= 1 && ischar (name))
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56 ## play a file
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57 if (nargin == 1)
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58 name = [name ".lin"];
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59 elseif (nargin == 2)
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60 name = [name "." ext];
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61 endif
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62 if (any (strcmp (ext, {"lin", "raw"})))
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63 [status, out] = system (sprintf ('cat "%s" > /dev/dsp', name));
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64 if (status != 0)
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65 system (sprintf ('paplay --raw "%s"', name));
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66 endif
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67 elseif (any (strcmp (ext, {"mu", "au" "snd", "ul"})))
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68 [status, out] = system (sprintf ('cat "%s" > /dev/audio', name));
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69 if (status != 0)
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70 system (sprintf ('paplay "%s"', name));
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71 endif
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72 else
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73 error ("playaudio: unsupported extension '%s'", ext);
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74 endif
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75 else
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76 print_usage ();
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77 endif
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78
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79 endfunction
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82 %% Test input validation
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83 %!error playaudio ()
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84 %!error playaudio (1,2,3)
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85 %!error <X must be a vector> playaudio (magic (3))
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86 %!error <unsupported extension> playaudio ("file", "abc")
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87 %!error playaudio ({"abc"})
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88