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/* This file is part of the KDE project
Copyright (C) 2002-2003 Matthias Kretz <kretz@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
// $Id$
#include "artsmoduleseffects.h"
#include <stdsynthmodule.h>
#include <c_filter_stuff.h>
#include <algorithm>
using namespace Arts;
using namespace std;
class Synth_VOICE_REMOVAL_impl : virtual public Synth_VOICE_REMOVAL_skel,
virtual public StdSynthModule
{
protected:
float _position, _frequency;
filter fleft, fright;
public:
Synth_VOICE_REMOVAL_impl()
: _position( 0 )
, _frequency( 200 )
{
}
float position() { return _position; }
void position(float newPosition)
{
if(newPosition != _position)
{
_position = newPosition;
position_changed(newPosition);
}
}
float frequency() { return _frequency; }
void frequency(float newFrequency)
{
if(newFrequency != _frequency)
{
_frequency = newFrequency;
// the shelve-lowpass-filter is extremely sensitive to frequencies which
// are out of it's range (it produces NaN's then) so we'll be careful ;)
if(_frequency > 22000.0) _frequency = 22000.0;
if(_frequency < 1.0) _frequency = 1.0;
frequency_changed(_frequency);
}
}
void streamInit()
{
initfilter(&fleft);
initfilter(&fright);
}
void calculateBlock(unsigned long samples)
{
setfilter_shelvelowpass(&fleft,_frequency,80.0);
setfilter_shelvelowpass(&fright,_frequency,80.0);
unsigned long i;
for (i=0; i<samples; i++)
{
fleft.x = inleft[i];// * min(float(1), (1 - _position));
fleft.y = fleft.cx * fleft.x + fleft.cx1 * fleft.x1 + fleft.cx2
* fleft.x2 + fleft.cy1 * fleft.y1 + fleft.cy2 * fleft.y2;
fleft.x2 = fleft.x1;
fleft.x1 = fleft.x;
fleft.y2 = fleft.y1;
fleft.y1 = fleft.y;
float highleft = inleft[i] - 0.95 * fleft.y;
fright.x = inright[i];// * min(float(1), (1 + _position));
fright.y = fright.cx * fright.x + fright.cx1 * fright.x1 + fright.cx2
* fright.x2 + fright.cy1 * fright.y1 + fright.cy2 * fright.y2;
fright.x2 = fright.x1;
fright.x1 = fright.x;
fright.y2 = fright.y1;
fright.y1 = fright.y;
float highright = inright[i] - 0.95 * fright.y;
outleft[i] = (inleft[i] - highright);// / min(float(1), (1 - _position));
outright[i] = (inright[i] - highleft);// / min(float(1), (1 + _position));
}
}
};
REGISTER_IMPLEMENTATION(Synth_VOICE_REMOVAL_impl);
// vim: sw=4 ts=4
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