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