mirror of
https://github.com/LMMS/lmms.git
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ec07aef5ac
This commit ensures that all defined data types in include/lmms_basics.h are
suffxed with "_t" to keep consistency as well as to fix issues on systems
with older STL/libstdc++.
(cherry picked from commit 7449c4f731)
156 lines
3.1 KiB
C++
156 lines
3.1 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) 2004-2009 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 "lmms_basics.h"
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#include "export.h"
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const int DefaultTicksPerTact = 192;
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const int DefaultStepsPerTact = 16;
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const int DefaultBeatsPerTact = DefaultTicksPerTact / DefaultStepsPerTact;
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class EXPORT midiTime
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{
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public:
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inline midiTime( const tact_t _tact, const tick_t _ticks ) :
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m_ticks( _tact * s_ticksPerTact + _ticks )
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{
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}
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inline midiTime( const tick_t _ticks = 0 ) :
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m_ticks( _ticks )
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{
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}
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inline midiTime( const midiTime & _t ) :
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m_ticks( _t.m_ticks )
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{
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}
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inline midiTime toNearestTact( void ) const
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{
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if( m_ticks % s_ticksPerTact >= s_ticksPerTact/2 )
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{
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return ( getTact() + 1 ) * s_ticksPerTact;
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}
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return getTact() * s_ticksPerTact;
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}
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inline midiTime & operator=( const midiTime & _t )
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{
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m_ticks = _t.m_ticks;
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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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m_ticks += _t.m_ticks;
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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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m_ticks -= _t.m_ticks;
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return *this;
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}
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inline tact_t getTact( void ) const
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{
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return m_ticks / s_ticksPerTact;
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}
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inline tact_t nextFullTact( void ) const
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{
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if( m_ticks % s_ticksPerTact == 0 )
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{
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return m_ticks / s_ticksPerTact;
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}
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return m_ticks / s_ticksPerTact + 1;
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}
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inline void setTicks( tick_t _t )
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{
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m_ticks = _t;
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}
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inline tick_t getTicks( void ) const
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{
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return m_ticks;
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}
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inline operator int( void ) const
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{
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return m_ticks;
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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_tick ) const
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{
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if( m_ticks >= 0 )
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{
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return static_cast<f_cnt_t>( m_ticks *
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_frames_per_tick );
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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_tick )
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{
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return midiTime( static_cast<int>( _frames /
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_frames_per_tick ) );
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}
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static tick_t ticksPerTact( void )
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{
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return s_ticksPerTact;
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}
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static int stepsPerTact( void )
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{
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return ticksPerTact() / DefaultBeatsPerTact;
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}
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static void setTicksPerTact( tick_t _tpt )
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{
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s_ticksPerTact = _tpt;
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}
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private:
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tick_t m_ticks;
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static tick_t s_ticksPerTact;
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} ;
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#endif
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