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71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/*
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* SweepOscillator.h - sweeping oscillator
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*
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* Copyright (c) 2006-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (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 GNU
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* 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
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* License along with this program (see COPYING); if not, write to the
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* 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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*/
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#ifndef _SWEEP_OSCILLATOR_H
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#define _SWEEP_OSCILLATOR_H
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#include "Oscillator.h"
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#include "DspEffectLibrary.h"
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template<class FX = DspEffectLibrary::StereoBypass>
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class SweepOscillator
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{
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public:
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SweepOscillator( const FX & _fx = FX() ) :
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m_phase( 0.0f ),
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m_FX( _fx )
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{
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}
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virtual ~SweepOscillator()
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{
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}
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void update( sampleFrame* buf, const fpp_t frames, const float freq1, const float freq2, const float sampleRate )
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{
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const float df = freq2 - freq1;
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for( fpp_t frame = 0; frame < frames; ++frame )
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{
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const sample_t s = Oscillator::sinSample( m_phase );
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buf[frame][0] = s;
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buf[frame][1] = s;
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m_FX.nextSample( buf[frame][0], buf[frame][1] );
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m_phase += ( freq1 + ( frame * df / frames ) ) / sampleRate;
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}
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}
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private:
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float m_phase;
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FX m_FX;
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// inline sample_t getSample( const float _sample );
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// inline void recalcPhase();
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} ;
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#endif
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