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131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
/*
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* Instrument.cpp - base-class for all instrument-plugins (synths, samplers etc)
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*
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* Copyright (c) 2005-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - http://lmms.io
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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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#include "Instrument.h"
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#include "InstrumentTrack.h"
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#include "DummyInstrument.h"
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#include "NotePlayHandle.h"
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#include "embed.h"
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#include "engine.h"
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Instrument::Instrument( InstrumentTrack * _instrument_track,
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const Descriptor * _descriptor ) :
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Plugin( _descriptor, NULL/* _instrument_track*/ ),
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m_instrumentTrack( _instrument_track )
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{
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}
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Instrument::~Instrument()
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{
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}
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void Instrument::play( sampleFrame * )
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{
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}
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void Instrument::deleteNotePluginData( NotePlayHandle * )
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{
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}
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f_cnt_t Instrument::beatLen( NotePlayHandle * ) const
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{
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return( 0 );
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}
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Instrument * Instrument::instantiate( const QString & _plugin_name,
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InstrumentTrack * _instrument_track )
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{
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Plugin * p = Plugin::instantiate( _plugin_name, _instrument_track,
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_instrument_track );
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// check whether instantiated plugin is an instrument
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if( dynamic_cast<Instrument *>( p ) != NULL )
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{
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// everything ok, so return pointer
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return dynamic_cast<Instrument *>( p );
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}
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// not quite... so delete plugin and return dummy instrument
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delete p;
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return( new DummyInstrument( _instrument_track ) );
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}
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bool Instrument::isFromTrack( const Track * _track ) const
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{
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return( m_instrumentTrack == _track );
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}
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void Instrument::applyRelease( sampleFrame * buf, const NotePlayHandle * _n )
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{
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const fpp_t frames = _n->framesLeftForCurrentPeriod();
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const fpp_t fpp = engine::mixer()->framesPerPeriod();
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const f_cnt_t fl = _n->framesLeft();
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if( fl <= desiredReleaseFrames()+fpp )
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{
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for( fpp_t f = (fpp_t)( ( fl > desiredReleaseFrames() ) ?
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( qMax( fpp - desiredReleaseFrames(), 0 ) +
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fl % fpp ) : 0 ); f < frames; ++f )
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{
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const float fac = (float)( fl-f-1 ) /
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desiredReleaseFrames();
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for( ch_cnt_t ch = 0; ch < DEFAULT_CHANNELS; ++ch )
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{
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buf[f][ch] *= fac;
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}
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}
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}
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}
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QString Instrument::fullDisplayName() const
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{
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return instrumentTrack()->displayName();
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}
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