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Resampler.h
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/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2011-2013 Leandro Nini <drfiemost@users.sourceforge.net>
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* Copyright 2007-2010 Antti Lankila
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef RESAMPLER_H
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#define RESAMPLER_H
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namespace
reSIDfp
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{
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class
Resampler
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{
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protected
:
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virtual
int
output()
const
= 0;
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Resampler
() {}
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public
:
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virtual
~
Resampler
() {}
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virtual
bool
input
(
int
sample) = 0;
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short
getOutput
()
const
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{
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const
int
value = output();
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// Clip signed integer value into the -32768,32767 range.
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#if 1
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// This requires two's complement integer
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return
((value + 0x8000) & ~0xFFFF) ? (value >> 31) ^ 0x7FFF : value;
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#else
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return
(value < -32768) ? -32768 : (value > 32767) ? 32767 : value;
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#endif
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}
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virtual
void
reset() = 0;
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};
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}
// namespace reSIDfp
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#endif
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