Mercurial > hg > octave-lyh
annotate scripts/audio/saveaudio.m @ 10635:d1978e7364ad
Print name of function in error() string messages.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Sun, 16 May 2010 22:26:54 -0700 |
| parents | 95c3e38098bf |
| children | be55736a0783 |
| rev | line source |
|---|---|
| 7017 | 1 ## Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2004, 2005, 2006, |
| 2 ## 2007 John W. Eaton | |
| 2313 | 3 ## |
| 4 ## This file is part of Octave. | |
| 5 ## | |
| 6 ## Octave is free software; you can redistribute it and/or modify it | |
| 7 ## under the terms of the GNU General Public License as published by | |
| 7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
| 9 ## your option) any later version. | |
| 2313 | 10 ## |
| 11 ## Octave is distributed in the hope that it will be useful, but | |
| 12 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 ## General Public License for more details. | |
| 15 ## | |
| 16 ## You should have received a copy of the GNU General Public License | |
| 7016 | 17 ## along with Octave; see the file COPYING. If not, see |
| 18 ## <http://www.gnu.org/licenses/>. | |
| 2303 | 19 |
| 3426 | 20 ## -*- texinfo -*- |
| 3332 | 21 ## @deftypefn {Function File} {} saveaudio (@var{name}, @var{x}, @var{ext}, @var{bps}) |
| 22 ## Saves a vector @var{x} of audio data to the file | |
| 23 ## @file{@var{name}.@var{ext}}. The optional parameters @var{ext} and | |
| 24 ## @var{bps} determine the encoding and the number of bits per sample used | |
| 25 ## in the audio file (see @code{loadaudio}); defaults are @file{lin} and | |
| 26 ## 8, respectively. | |
| 5642 | 27 ## @seealso{lin2mu, mu2lin, loadaudio, playaudio, setaudio, record} |
| 3332 | 28 ## @end deftypefn |
| 2311 | 29 |
| 2312 | 30 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
| 31 ## Created: 5 September 1994 | |
| 32 ## Adapted-By: jwe | |
| 33 | |
| 1636 | 34 function saveaudio (name, X, ext, bit) |
| 2325 | 35 |
| 1636 | 36 if (nargin < 2 || nargin > 4) |
| 6046 | 37 print_usage (); |
| 1636 | 38 endif |
| 39 | |
| 40 if (nargin == 2) | |
| 41 ext = "lin"; | |
| 42 endif | |
| 43 | |
| 44 if (nargin < 4) | |
| 45 bit = 8; | |
| 46 elseif (bit != 8 && bit != 16) | |
| 47 error ("saveaudio: bit must be either 8 or 16"); | |
| 48 endif | |
| 49 | |
| 50 [nr, nc] = size (X); | |
| 51 if (nc != 1) | |
| 52 if (nr == 1) | |
| 53 X = X'; | |
| 54 nr = nc; | |
| 55 else | |
| 3458 | 56 error ("saveaudio: X must be a vector"); |
| 1636 | 57 endif |
| 58 endif | |
| 59 | |
| 3167 | 60 num = fopen ([name, ".", ext], "wb"); |
| 1636 | 61 |
| 2325 | 62 if (strcmp (ext, "lin") || strcmp (ext, "raw")) |
| 1636 | 63 if (bit == 8) |
| 64 ld = max (abs (X)); | |
| 65 if (ld > 127) # convert 16 to 8 bit | |
| 3426 | 66 if (ld < 16384) |
| 67 sc = 64 / ld; | |
| 68 else | |
| 69 sc = 1 / 256; | |
| 70 endif | |
| 71 X = fix (X * sc); | |
| 1636 | 72 endif |
| 73 X = X + 127; | |
| 74 c = fwrite (num, X, "uchar"); | |
| 75 else | |
| 76 c = fwrite (num, X, "short"); | |
| 77 endif | |
| 3471 | 78 elseif (strcmp (ext, "mu") || strcmp (ext, "au") |
| 10549 | 79 || strcmp (ext, "snd") || strcmp (ext, "ul")) |
| 1636 | 80 Y = lin2mu (X); |
| 81 c = fwrite (num, Y, "uchar"); | |
| 82 else | |
| 83 fclose (num); | |
|
10635
d1978e7364ad
Print name of function in error() string messages.
Rik <octave@nomad.inbox5.com>
parents:
10549
diff
changeset
|
84 error ("saveaudio: unsupported extension"); |
| 1636 | 85 endif |
| 86 | |
| 87 fclose (num); | |
| 2325 | 88 |
| 1636 | 89 endfunction |