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https://github.com/LMMS/lmms.git
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129 lines
2.5 KiB
C++
129 lines
2.5 KiB
C++
/*
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* MidiImport.h - support for importing MIDI-files
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*
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* Copyright (c) 2005-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - http://lmms.io
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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_IMPORT_H
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#define _MIDI_IMPORT_H
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#include <QString>
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#include <QPair>
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#include <QVector>
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#include "MidiEvent.h"
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#include "ImportFilter.h"
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class MidiImport : public ImportFilter
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{
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Q_OBJECT
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public:
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MidiImport( const QString & _file );
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virtual ~MidiImport();
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virtual PluginView * instantiateView( QWidget * )
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{
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return( NULL );
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}
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private:
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virtual bool tryImport( TrackContainer* tc );
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bool readSMF( TrackContainer* tc );
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bool readRIFF( TrackContainer* tc );
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bool readTrack( int _track_end, QString & _track_name );
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void error( void );
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inline int readInt( int _bytes )
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{
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int c, value = 0;
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do
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{
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c = readByte();
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if( c == -1 )
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{
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return( -1 );
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}
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value = ( value << 8 ) | c;
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} while( --_bytes );
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return( value );
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}
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inline int read32LE()
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{
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int value = readByte();
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value |= readByte() << 8;
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value |= readByte() << 16;
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value |= readByte() << 24;
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return value;
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}
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inline int readVar()
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{
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int c = readByte();
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int value = c & 0x7f;
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if( c & 0x80 )
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{
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c = readByte();
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value = ( value << 7 ) | ( c & 0x7f );
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if( c & 0x80 )
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{
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c = readByte();
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value = ( value << 7 ) | ( c & 0x7f );
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if( c & 0x80 )
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{
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c = readByte();
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value = ( value << 7 ) | c;
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if( c & 0x80 )
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{
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return -1;
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}
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}
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}
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}
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return( !file().atEnd() ? value : -1 );
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}
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inline int readID()
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{
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return read32LE();
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}
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inline void skip( int _bytes )
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{
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while( _bytes > 0 )
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{
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readByte();
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--_bytes;
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}
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}
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typedef QVector<QPair<int, MidiEvent> > EventVector;
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EventVector m_events;
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int m_timingDivision;
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} ;
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#endif
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