Mercurial > octave
view scripts/audio/soundsc.m @ 33579:396481f4e261 bytecode-interpreter tip
maint: Merge default to bytecode-interpreter
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Sun, 12 May 2024 21:03:47 -0400 |
parents | 2e484f9f1f18 |
children |
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######################################################################## ## ## Copyright (C) 2016-2024 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} soundsc (@var{y}) ## @deftypefnx {} {} soundsc (@var{y}, @var{fs}) ## @deftypefnx {} {} soundsc (@var{y}, @var{fs}, @var{nbits}) ## @deftypefnx {} {} soundsc (@dots{}, [@var{ymin}, @var{ymax}]) ## Scale the audio data @var{y} and play it at sample rate @var{fs} to the ## default audio device. ## ## The audio signal @var{y} can be a vector or a two-column array representing ## mono or stereo audio, respectively. ## ## If @var{fs} is not given, a default sample rate of 8000 samples per second ## is used. ## ## The optional argument @var{nbits} specifies the bit depth to play to the ## audio device and defaults to 8 bits. ## ## By default, @var{y} is automatically normalized to the range [-1, 1]. If ## the range [@var{ymin}, @var{ymax}] is given, then elements of @var{y} ## that fall within the range @var{ymin} @leq{} @var{y} @leq{} @var{ymax} ## are scaled to the range [-1, 1] instead. ## ## For more control over audio playback, use the @code{audioplayer} class. ## @seealso{sound, @audioplayer/audioplayer, record} ## @end deftypefn function soundsc (y, fs, nbits, yrange = []) if (nargin < 1) print_usage (); endif if (nargin < 2 || isempty (fs)) fs = 8000; elseif (nargin == 2 && numel (fs) > 1) yrange = fs; fs = 8000; elseif (! (isscalar (fs) && fs > 0)) error ("soundsc: sample rate FS must be a positive number"); endif if (nargin < 3 || isempty (nbits)) nbits = 8; elseif (nargin == 3 && numel (nbits) > 1) yrange = nbits; nbits = 8; elseif (! (isscalar (nbits) && (nbits == 8 || nbits == 16 || nbits == 24))) error ("soundsc: bit depth NBITS must be 8, 16, or 24"); endif if (isreal (yrange) && (numel (yrange) == 2) && (yrange(1) <= yrange(2))) ymin = yrange(1); ymax = yrange(2); elseif (isempty (yrange)) ymin = min (y(:)); ymax = max (y(:)); else error ("soundsc: audio range must be a 2-element [YMIN, YMAX] vector"); endif ymin = double (ymin); ymax = double (ymax); ymedian = (ymax + ymin) / 2; yscale = 2 / (ymax - ymin); y = (double (y) - ymedian) .* yscale; play = audioplayer (y, fs, nbits); playblocking (play); endfunction ## Tests of soundsc must not actually play anything. ## Test input validation %!error <Invalid call> soundsc () %!error <FS must be a positive number> soundsc (1, ones (2,2), 8) %!error <FS must be a positive number> soundsc (1, -1) %!error <NBITS must be 8, 16, or 24> soundsc (1, [], 2) %!error <range must be a 2-element .* vector> soundsc (1, [2 1]) %!error <range must be a 2-element .* vector> soundsc (1, [1 2 3]) %!error <range must be a 2-element .* vector> soundsc (1, 8000, [2 1]) %!error <range must be a 2-element .* vector> soundsc (1, 8000, [1 2 3]) %!error <range must be a 2-element .* vector> soundsc (1, 8000, 8, [2 1]) %!error <range must be a 2-element .* vector> soundsc (1, 8000, 8, [1 2 3])