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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1097 0778d3d1-df1d-0410-868b-ea421aaaa00d
77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
/*
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* sweep_oscillator.h - sweep-oscillator
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*
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* Copyright (c) 2006-2008 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 "effect_lib.h"
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template<class FX = effectLib::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 * _ab, const fpp_t _frames,
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const float _freq1, const float _freq2,
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const float _sample_rate )
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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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sample_t s = oscillator::sinSample( m_phase );
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for( ch_cnt_t ch = 0; ch < DEFAULT_CHANNELS; ++ch )
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{
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_ab[frame][ch] = s;
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}
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m_FX.nextSample( _ab[frame][0], _ab[frame][1] );
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m_phase += ( _freq1 + ( frame * df / _frames ) ) /
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_sample_rate;
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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( void );
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} ;
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#endif
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