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The MIDI event handling in InstrumentTrack was complex and buggy. It has been simplified now such that processInEvent() tries to handle note on, note off and key pressure events. The actions taken should result in equivalent calls to processOutEvent() by NotePlayHandle instances. The processOutEvent() function sends according MIDI events to the attached instruments. All unhandled MIDI events are directly forwarded to the instrument in processInEvent(). It's possible that some corner-cases are not handled yet with the new code and we have regressions now. Furthermore renamed midiTime/midiEvent to MidiTime/MidiEvent to match coding style. Closes #72.
154 lines
3.0 KiB
C++
154 lines
3.0 KiB
C++
/*
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* MidiTime.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) 2004-2014 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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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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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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MidiTime( const MidiTime& time ) :
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m_ticks( time.m_ticks )
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{
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}
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MidiTime toNearestTact() 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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MidiTime& operator=( const MidiTime& time )
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{
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m_ticks = time.m_ticks;
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return *this;
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}
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MidiTime& operator+=( const MidiTime& time )
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{
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m_ticks += time.m_ticks;
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return *this;
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}
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MidiTime& operator-=( const MidiTime& time )
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{
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m_ticks -= time.m_ticks;
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return *this;
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}
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tact_t getTact() const
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{
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return m_ticks / s_ticksPerTact;
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}
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tact_t nextFullTact() 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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void setTicks( tick_t ticks )
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{
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m_ticks = ticks;
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}
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tick_t getTicks() const
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{
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return m_ticks;
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}
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operator int() 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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f_cnt_t frames( const float framesPerTick ) 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 * framesPerTick );
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}
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return 0;
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}
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static MidiTime fromFrames( const f_cnt_t frames, const float framesPerTick )
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{
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return MidiTime( static_cast<int>( frames / framesPerTick ) );
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}
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static tick_t ticksPerTact()
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{
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return s_ticksPerTact;
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}
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static int stepsPerTact()
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{
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return qMax( 1, 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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