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git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@23 0778d3d1-df1d-0410-868b-ea421aaaa00d
130 lines
2.7 KiB
C++
130 lines
2.7 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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* Linux MultiMedia Studio
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* Copyright (c) 2004-2005 Tobias Doerffel <tobydox/at/users.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 & 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 Uint32 frames( const float _frames_per_tact ) const
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{
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if( m_tact >= 0 )
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{
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return( static_cast<Uint32>( m_tact *
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_frames_per_tact +
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m_tact64th *
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_frames_per_tact /
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64.0f ) );
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}
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return( 0 );
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}
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static inline midiTime fromFrames( Uint32 _frames,
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const float _frames_per_tact )
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{
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return( midiTime( static_cast<Sint32>( _frames * 64.0f /
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_frames_per_tact ) ) );
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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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