Mercurial > octave-dspies
view scripts/audio/saveaudio.m @ 19010:3fb030666878 draft default tip dspies
Added special-case logical-indexing function
* logical-index.h (New file) : Logical-indexing function. May be called on
octave_value types via call_bool_index
* nz-iterators.h : Add base-class nz_iterator for iterator types. Array has
template bool for whether to internally store row-col or compute on the fly
Add skip_ahead method which skips forward to the next nonzero after its
argument
Add flat_index for computing octave_idx_type index of current position (with
assertion failure in the case of overflow)
Move is_zero to separate file
* ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-perm.cc
(do_index_op): Add call to call_bool_index in logical-index.h
* Array.h : Move forward-declaration for array_iterator to separate header file
* dim-vector.cc (dim_max): Refers to idx-bounds.h (max_idx)
* array-iter-decl.h (New file): Header file for forward declaration of
array-iterator
* direction.h : Add constants fdirc and bdirc to avoid having to reconstruct
them
* dv-utils.h, dv-utils.cc (New files) :
Utility functions for querying and constructing dim-vectors
* idx-bounds.h (New file) :
Utility constants and functions for determining whether things will overflow
the maximum allowed bounds
* interp-idx.h (New function : to_flat_idx) : Converts row-col pair to linear
index of octave_idx_type
* is-zero.h (New file) : Function for determining whether an element is zero
* logical-index.tst : Add tests for correct return-value dimensions and large
sparse matrix behavior
author | David Spies <dnspies@gmail.com> |
---|---|
date | Fri, 25 Jul 2014 13:39:31 -0600 |
parents | d63878346099 |
children |
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## Copyright (C) 1995-2013 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} {} 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 <Andreas.Weingessel@ci.tuwien.ac.at> ## 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