interpretor/libsndfile-1.0.25/Octave/octave_test.m

   1 # Copyright (C) 2007-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU Lesser General Public License as published by
   5 # the Free Software Foundation; either version 2.1 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU Lesser General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU Lesser General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16
  17 # These tests are nowhere near comprehensive.
  18
  19 printf ("    Running Octave tests                     : ") ;
  20 fflush (stdout) ;
  21
  22 filename = "whatever" ;
  23 srate_out = 32000 ;
  24 fmt_out = "wav-float" ;
  25
  26 t = (2 * pi / srate_out * (0:srate_out-1))' ;
  27 data_out = sin (440.0 * t) ;
  28
  29 # Write out a file.
  30 sfwrite (filename, data_out, srate_out, fmt_out) ;
  31
  32 # Read it back in again.
  33 [ data_in, srate_in, fmt_in ] = sfread (filename) ;
  34
  35 if (srate_in != srate_out)
  36         error ("\n\nSample rate mismatch : %d -> %d.\n\n", srate_out, srate_in) ;
  37         endif
  38
  39 # Octave strcmp return 1 for the same.
  40 if (strcmp (fmt_in, fmt_out) != 1)
  41         error ("\n\nFormat error : '%s' -> '%s'.\n\n", fmt_out, fmt_in) ;
  42         endif
  43
  44 err = max (abs (data_out - data_in)) ;
  45
  46 if (err > 1e-7)
  47         error ("err : %g\n", err) ;
  48         endif
  49
  50 printf ("ok") ;
  51
  52 unlink (filename) ;