update packages

[CreaPhase.git] / octave_packages / m / audio / record.m

diff --git a/octave_packages/m/audio/record.m b/octave_packages/m/audio/record.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
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} record (@var{sec}, @var{sampling_rate})
+## Record @var{sec} seconds of audio input into the vector @var{x}.  The
+## default value for @var{sampling_rate} is 8000 samples per second, or
+## 8kHz.  The program waits until the user types @key{RET} and then
+## immediately starts to record.
+## @seealso{lin2mu, mu2lin, loadaudio, saveaudio, playaudio, setaudio}
+## @end deftypefn
+
+## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
+## Created: 19 September 1994
+## Adapted-By: jwe
+
+function X = record (sec, sampling_rate)
+
+  if (nargin == 1)
+    sampling_rate = 8000;
+  elseif (nargin != 2)
+    print_usage ();
+  endif
+
+  unwind_protect
+
+    file = tmpnam ();
+
+    input ("Please hit ENTER and speak afterwards!\n", 1);
+
+    cmd = sprintf ("dd if=/dev/dsp of=\"%s\" bs=%d count=%d",
+                   file, sampling_rate, sec);
+
+    system (cmd);
+
+    num = fopen (file, "rb");
+
+    [Y, c] = fread (num, sampling_rate * sec, "uchar");
+
+    fclose (num);
+
+  unwind_protect_cleanup
+
+    unlink (file);
+
+  end_unwind_protect
+
+  X = Y - 127;
+
+endfunction