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1 ## Copyright (C) 1996, 1997 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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## usage: playaudio (name [, ext]) |
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21 ## playaudio (X) |
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22 ## |
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23 ## `playaudio ("name" [, "ext"])' plays the audio file "name.ext". The |
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24 ## default value for the "ext" argument, which has to be written |
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25 ## without the initial ".", is "lin". |
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26 ## Currently, the following audio formats are suppored: |
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27 ## *) linear encoding with extension "lin" or "raw", played using |
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28 ## /dev/dsp |
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29 ## *) mu-law encoding with extension "mu", "au" or "snd", played |
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30 ## using /dev/audio |
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31 ## |
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32 ## `playaudio (X)' plays the audio data contained in the vector X. |
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33 |
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34 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
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35 ## Created: 11 April 1994 |
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36 ## Adapted-By: jwe |
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37 |
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38 function playaudio (name, ext) |
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39 |
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40 usage_msg = "playaudio (name [, ext]) or playaudio (X)"; |
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41 |
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42 if (nargin == 1 && is_vector (name) && ! isstr (name)) |
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43 ## play a vector |
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44 [nr, nc] = size (name); |
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45 if (nc != 1) |
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46 if (nr == 1) |
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47 name = name'; |
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48 nr = nc; |
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49 else |
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50 error ("playaudio: X must be a vector"); |
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51 endif |
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52 endif |
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53 X = name + 127; |
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54 unwind_protect |
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55 file = tmpnam (); |
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56 num = fopen (file, "wb"); |
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57 c = fwrite (num, X, "uchar"); |
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58 fclose (num); |
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59 system (sprintf ("cat %s > /dev/dsp", file)); |
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60 unwind_protect_cleanup |
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61 unlink (file); |
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62 end_unwind_protect |
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63 elseif (nargin >= 1 && isstr (name)) |
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64 ## play a file |
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65 if (nargin == 1) |
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66 name = [name, ".lin"]; |
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67 elseif (nargin == 2) |
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68 name = [name, ".", ext]; |
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69 else |
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70 usage (usage_msg); |
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71 endif |
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72 if (strcmp (ext, "lin") || strcmp (ext, "raw")) |
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73 system (sprintf ("cat %s > /dev/dsp", name)); |
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74 elseif (strcmp (ext, "mu") || strcmp (ext, "au") || strcmp (ext, "snd")) |
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75 system (sprintf ("cat %s > /dev/audio", name)); |
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76 else |
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77 error ("playaudio does not support given extension"); |
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78 endif |
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79 else |
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80 usage (usage_msg); |
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81 endif |
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82 |
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83 endfunction |
