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tdemultimedia/arts/modules/synth/synth_pscale_impl.cc

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/*
Copyright (C) 2000 Jeff Tranter
tranter@pobox.com
(C) 1999 Stefan Westerfeld
stefan@space.twc.de
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "artsmodulessynth.h"
#include "stdsynthmodule.h"
using namespace Arts;
class Synth_PSCALE_impl : virtual public Synth_PSCALE_skel,
virtual public StdSynthModule
{
protected:
float _top;
public:
float top() { return _top; }
void top(float newTop) { _top = newTop; }
void calculateBlock(unsigned long samples)
{
for (unsigned int i=0; i < samples; i++)
{
if (pos[i] >= _top)
outvalue[i] = invalue[i] * (1 - pos[i])/(1 - _top);
else
outvalue[i] = invalue[i] * pos[i] / _top;
}
}
};
REGISTER_IMPLEMENTATION(Synth_PSCALE_impl);