mirror of
https://github.com/LMMS/lmms.git
synced 2026-05-16 10:46:39 -04:00
2fcd8150d9
git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@908 0778d3d1-df1d-0410-868b-ea421aaaa00d
140 lines
3.0 KiB
C++
140 lines
3.0 KiB
C++
/*
|
|
* midi_time.h - declaration of class midiTime which provides data-type for
|
|
* position- and length-variables
|
|
*
|
|
* Copyright (c) 2004-2008 Tobias Doerffel <tobydox/at/users.sourceforge.net>
|
|
*
|
|
* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program (see COPYING); if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
|
|
#ifndef _MIDI_TIME_H
|
|
#define _MIDI_TIME_H
|
|
|
|
#include "types.h"
|
|
|
|
const int DefaultTicksPerTact = 192;
|
|
|
|
class midiTime
|
|
{
|
|
public:
|
|
inline midiTime( const tact _tact, const tick _ticks ) :
|
|
m_tact( _tact ),
|
|
m_ticks( _ticks )
|
|
{
|
|
}
|
|
|
|
inline midiTime( const int _abs = 0 ) :
|
|
m_tact( _abs / DefaultTicksPerTact ),
|
|
m_ticks( _abs % DefaultTicksPerTact )
|
|
{
|
|
}
|
|
|
|
inline midiTime( const midiTime & _t )
|
|
{
|
|
*this = _t;
|
|
}
|
|
|
|
inline midiTime toNearestTact( void ) const
|
|
{
|
|
if( m_ticks >= DefaultTicksPerTact/2 )
|
|
{
|
|
return( m_tact * DefaultTicksPerTact +
|
|
DefaultTicksPerTact );
|
|
}
|
|
return( m_tact * DefaultTicksPerTact );
|
|
}
|
|
|
|
inline midiTime & operator=( const midiTime & _t )
|
|
{
|
|
m_tact = _t.m_tact;
|
|
m_ticks = _t.m_ticks;
|
|
return( *this );
|
|
}
|
|
|
|
inline midiTime & operator+=( const midiTime & _t )
|
|
{
|
|
return( *this = static_cast<int>( *this ) +
|
|
static_cast<int>( _t ) );
|
|
}
|
|
|
|
inline midiTime & operator-=( const midiTime & _t )
|
|
{
|
|
return( *this = static_cast<int>( *this ) -
|
|
static_cast<int>( _t ) );
|
|
}
|
|
|
|
inline void setTact( tact _t )
|
|
{
|
|
m_tact = _t;
|
|
}
|
|
|
|
inline tact getTact( void ) const
|
|
{
|
|
return( m_tact );
|
|
}
|
|
|
|
inline void setTicks( tick _t )
|
|
{
|
|
m_ticks = _t;
|
|
}
|
|
|
|
inline tick getTicks( void ) const
|
|
{
|
|
return( m_ticks );
|
|
}
|
|
|
|
// converts time-class in an absolute value, useful for calculations,
|
|
// comparisons and so on...
|
|
inline operator int( void ) const
|
|
{
|
|
return( static_cast<int>( m_tact ) * DefaultTicksPerTact +
|
|
static_cast<int>( m_ticks ) );
|
|
}
|
|
|
|
// calculate number of frame that are needed this time
|
|
inline f_cnt_t frames( const float _frames_per_tick ) const
|
|
{
|
|
if( m_tact >= 0 )
|
|
{
|
|
return( static_cast<f_cnt_t>(
|
|
( m_tact * DefaultTicksPerTact + m_ticks ) *
|
|
_frames_per_tick ) );
|
|
}
|
|
return( 0 );
|
|
}
|
|
|
|
static inline midiTime fromFrames( const f_cnt_t _frames,
|
|
const float _frames_per_tick )
|
|
{
|
|
return( midiTime( static_cast<int>( _frames /
|
|
_frames_per_tick ) ) );
|
|
}
|
|
|
|
|
|
private:
|
|
tact m_tact;
|
|
tick m_ticks;
|
|
|
|
} ;
|
|
|
|
|
|
#endif
|
|
|