X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fm%2Faudio%2Fsaveaudio.m;fp=octave_packages%2Fm%2Faudio%2Fsaveaudio.m;h=6361c876f1f9ad4ece65a6a2744ee54e21690412;hp=0000000000000000000000000000000000000000;hb=1c0469ada9531828709108a4882a751d2816994a;hpb=63de9f36673d49121015e3695f2c336ea92bc278
diff --git a/octave_packages/m/audio/saveaudio.m b/octave_packages/m/audio/saveaudio.m
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+## Copyright (C) 1995-2012 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
+## .
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} saveaudio (@var{name}, @var{x}, @var{ext}, @var{bps})
+## Save a vector @var{x} of audio data to the file
+## @file{@var{name}.@var{ext}}. The optional parameters @var{ext} and
+## @var{bps} determine the encoding and the number of bits per sample used
+## in the audio file (see @code{loadaudio}); defaults are @file{lin} and
+## 8, respectively.
+## @seealso{lin2mu, mu2lin, loadaudio, playaudio, setaudio, record}
+## @end deftypefn
+
+## Author: AW
+## Created: 5 September 1994
+## Adapted-By: jwe
+
+function saveaudio (name, x, ext, bps)
+
+ if (nargin < 2 || nargin > 4)
+ print_usage ();
+ endif
+
+ if (nargin == 2)
+ ext = "lin";
+ endif
+
+ if (nargin < 4)
+ bps = 8;
+ elseif (bps != 8 && bps != 16)
+ error ("saveaudio: BPS must be either 8 or 16");
+ endif
+
+ [nr, nc] = size (x);
+ if (nc != 1)
+ if (nr == 1)
+ x = x';
+ nr = nc;
+ else
+ error ("saveaudio: X must be a vector");
+ endif
+ endif
+
+ num = fopen ([name, ".", ext], "wb");
+
+ if (strcmp (ext, "lin") || strcmp (ext, "raw"))
+ if (bps == 8)
+ ld = max (abs (x));
+ if (ld > 127) # convert 16 to 8 bit
+ if (ld < 16384)
+ sc = 64 / ld;
+ else
+ sc = 1 / 256;
+ endif
+ x = fix (x * sc);
+ endif
+ x = x + 127;
+ c = fwrite (num, x, "uchar");
+ else
+ c = fwrite (num, x, "short");
+ endif
+ elseif (strcmp (ext, "mu") || strcmp (ext, "au")
+ || strcmp (ext, "snd") || strcmp (ext, "ul"))
+ y = lin2mu (x);
+ c = fwrite (num, y, "uchar");
+ else
+ fclose (num);
+ error ("saveaudio: unsupported extension");
+ endif
+
+ fclose (num);
+
+endfunction