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Diffstat (limited to 'arts/modules/effects/synth_voice_removal_impl.cc')
| -rw-r--r-- | arts/modules/effects/synth_voice_removal_impl.cc | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arts/modules/effects/synth_voice_removal_impl.cc b/arts/modules/effects/synth_voice_removal_impl.cc new file mode 100644 index 00000000..8aee1218 --- /dev/null +++ b/arts/modules/effects/synth_voice_removal_impl.cc @@ -0,0 +1,108 @@ +/* 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, 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 |