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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) ???? - INRIA - Scilab
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function [mu]=lin2mu(y)
//Utility fct: converts linear signal to mu-law encoding.
// mu = lin2mu(y) converts linear audio signal amplitudes
// in the range -1 <= y <= 1 to mu-law in the range 0 <= mu <= 255.
SCALE = 32768;
BIAS = 132;
CLIP = 32635;
OFFSET = 335;
y = SCALE*y;
sig = sign(y)+bool2s(y==0);
y = min(abs(y),CLIP);
[f,e] = frexp(y+BIAS);
mu = 64*sig-16*e-fix(32*f)+OFFSET;
endfunction
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