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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@380 0778d3d1-df1d-0410-868b-ea421aaaa00d
137 lines
2.9 KiB
C++
137 lines
2.9 KiB
C++
/*
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* midi_time.h - declaration of class midiTime which provides data-type for
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* position- and length-variables
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*
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* Copyright (c) 2004-2006 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 _MIDI_TIME_H
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#define _MIDI_TIME_H
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#include "types.h"
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class midiTime
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{
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public:
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inline midiTime( const tact _tact, const tact64th _tact_64th ) :
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m_tact( _tact ),
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m_tact64th( _tact_64th )
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{
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}
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inline midiTime( const Sint32 _abs = 0 ) :
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m_tact( _abs / 64 ),
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m_tact64th( _abs % 64 )
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{
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}
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inline midiTime( const midiTime & _t )
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{
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*this = _t;
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}
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inline midiTime toNearestTact( void ) const
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{
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if( m_tact64th >= 32 )
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{
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return( m_tact * 64 + 64 );
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}
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return( m_tact * 64 );
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}
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inline midiTime & operator=( const midiTime & _t )
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{
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m_tact = _t.m_tact;
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m_tact64th = _t.m_tact64th;
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return( *this );
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}
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inline midiTime & operator+=( const midiTime & _t )
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{
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return( *this = static_cast<Sint32>( *this ) +
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static_cast<Sint32>( _t ) );
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}
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inline midiTime & operator-=( const midiTime & _t )
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{
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return( *this = static_cast<Sint32>( *this ) -
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static_cast<Sint32>( _t ) );
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}
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inline void setTact( tact _t )
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{
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m_tact = _t;
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}
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inline tact getTact( void ) const
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{
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return( m_tact );
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}
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inline void setTact64th( tact64th _t )
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{
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m_tact64th = _t;
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}
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inline tact64th getTact64th( void ) const
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{
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return( m_tact64th );
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}
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// converts time-class in an absolute value, useful for calculations,
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// comparisons and so on...
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inline operator Sint32( void ) const
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{
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return( static_cast<Sint32>( m_tact ) * 64 +
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static_cast<Sint32>( m_tact64th ) );
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}
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// calculate number of frame that are needed this time
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inline f_cnt_t frames( const float _frames_per_tact64th ) const
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{
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if( m_tact >= 0 )
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{
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return( static_cast<f_cnt_t>( ( m_tact * 64
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+ m_tact64th ) * _frames_per_tact64th ) );
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}
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return( 0 );
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}
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static inline midiTime fromFrames( const f_cnt_t _frames,
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const float _frames_per_tact64th )
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{
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return( midiTime( static_cast<Sint32>( _frames /
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_frames_per_tact64th ) ) );
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}
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private:
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tact m_tact;
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tact64th m_tact64th;
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} ;
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#endif
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