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## Copyright (C) 2013-2022 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.
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## Octave is free software: you can redistribute it and/or modify it
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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########################################################################

## -*- texinfo -*-
## @deftypefn  {} {@var{data} =} getaudiodata (@var{recorder})
## @deftypefnx {} {@var{data} =} getaudiodata (@var{recorder}, @var{datatype})
## Return recorder audio data as a matrix with values between -1.0 and 1.0
## and with as many columns as there are channels in the recorder.
##
## Given the optional argument @var{datatype}, convert the recorded data
## to the specified type, which may be one of @qcode{"double"},
## @qcode{"single"}, @qcode{"int16"}, @qcode{"int8"} or @qcode{"uint8"}.
## @end deftypefn

function data = getaudiodata (varargin)

  if (nargin < 1 || nargin > 2)
    print_usage ();
  endif

  recorder = varargin{1};

  if (nargin == 1)
    data = __recorder_getaudiodata__ (struct (recorder).recorder);
  else
    data = __recorder_getaudiodata__ (struct (recorder).recorder);
    type = varargin{2};
    switch (type)
      case "int16"
        data = int16 (data * (2.0 ^ 15));
      case "int8"
        data = int8 (data * (2.0 ^ 7));
      case "uint8"
        data = uint8 ((data + 1.0) * 0.5 * (2.0 ^ 8 - 1));
    endswitch
  endif

  if (get (recorder, "NumberOfChannels") == 2)
    data = data';
  else
    data = data(1,:)';
  endif

endfunction
