lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:    This is a modified version of a source file from the 
lbajardsilogic@0:    Rosegarden MIDI and audio sequencer and notation editor.
lbajardsilogic@0:    This file copyright 2000-2006 Richard Bown and Chris Cannam.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #ifndef _MIDI_FILE_READER_H_
lbajardsilogic@0: #define _MIDI_FILE_READER_H_
lbajardsilogic@0: 
lbajardsilogic@0: #include "DataFileReader.h"
lbajardsilogic@0: #include "base/RealTime.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include <map>
lbajardsilogic@0: #include <set>
lbajardsilogic@0: #include <vector>
lbajardsilogic@0: 
lbajardsilogic@0: #include <QObject>
lbajardsilogic@0: 
lbajardsilogic@0: class MIDIEvent;
lbajardsilogic@0: 
lbajardsilogic@0: class MIDIFileReader : public DataFileReader
lbajardsilogic@0: {
lbajardsilogic@0:     Q_OBJECT
lbajardsilogic@0: 
lbajardsilogic@0: public:
lbajardsilogic@0:     MIDIFileReader(QString path, size_t mainModelSampleRate);
lbajardsilogic@0:     virtual ~MIDIFileReader();
lbajardsilogic@0: 
lbajardsilogic@0:     virtual bool isOK() const;
lbajardsilogic@0:     virtual QString getError() const;
lbajardsilogic@0:     virtual Model *load() const;
lbajardsilogic@0: 
lbajardsilogic@0:     typedef unsigned char MIDIByte;
lbajardsilogic@0: 
lbajardsilogic@0: protected:
lbajardsilogic@0:     typedef std::vector<MIDIEvent *> MIDITrack;
lbajardsilogic@0:     typedef std::map<unsigned int, MIDITrack> MIDIComposition;
lbajardsilogic@0:     typedef std::pair<RealTime, double> TempoChange; // time, qpm
lbajardsilogic@0:     typedef std::map<unsigned long, TempoChange> TempoMap; // key is MIDI time
lbajardsilogic@0: 
lbajardsilogic@0:     typedef enum {
lbajardsilogic@0: 	MIDI_SINGLE_TRACK_FILE          = 0x00,
lbajardsilogic@0: 	MIDI_SIMULTANEOUS_TRACK_FILE    = 0x01,
lbajardsilogic@0: 	MIDI_SEQUENTIAL_TRACK_FILE      = 0x02,
lbajardsilogic@0: 	MIDI_FILE_BAD_FORMAT            = 0xFF
lbajardsilogic@0:     } MIDIFileFormatType;
lbajardsilogic@0: 
lbajardsilogic@0:     bool parseFile();
lbajardsilogic@0:     bool parseHeader(const std::string &midiHeader);
lbajardsilogic@0:     bool parseTrack(unsigned int &trackNum);
lbajardsilogic@0: 
lbajardsilogic@0:     Model *loadTrack(unsigned int trackNum,
lbajardsilogic@0: 		     Model *existingModel = 0,
lbajardsilogic@0: 		     int minProgress = 0,
lbajardsilogic@0: 		     int progressAmount = 100) const;
lbajardsilogic@0: 
lbajardsilogic@0:     bool consolidateNoteOffEvents(unsigned int track);
lbajardsilogic@0:     void updateTempoMap(unsigned int track);
lbajardsilogic@0:     void calculateTempoTimestamps();
lbajardsilogic@0:     RealTime getTimeForMIDITime(unsigned long midiTime) const;
lbajardsilogic@0: 
lbajardsilogic@0:     // Internal convenience functions
lbajardsilogic@0:     //
lbajardsilogic@0:     int  midiBytesToInt(const std::string &bytes);
lbajardsilogic@0:     long midiBytesToLong(const std::string &bytes);
lbajardsilogic@0: 
lbajardsilogic@0:     long getNumberFromMIDIBytes(int firstByte = -1);
lbajardsilogic@0: 
lbajardsilogic@0:     MIDIByte getMIDIByte();
lbajardsilogic@0:     std::string getMIDIBytes(unsigned long bytes);
lbajardsilogic@0: 
lbajardsilogic@0:     bool skipToNextTrack();
lbajardsilogic@0: 
lbajardsilogic@0:     int                    m_timingDivision;   // pulses per quarter note
lbajardsilogic@0:     MIDIFileFormatType     m_format;
lbajardsilogic@0:     unsigned int           m_numberOfTracks;
lbajardsilogic@0: 
lbajardsilogic@0:     long                   m_trackByteCount;
lbajardsilogic@0:     bool                   m_decrementCount;
lbajardsilogic@0: 
lbajardsilogic@0:     std::map<int, QString> m_trackNames;
lbajardsilogic@0:     std::set<unsigned int> m_loadableTracks;
lbajardsilogic@0:     std::set<unsigned int> m_percussionTracks;
lbajardsilogic@0:     MIDIComposition        m_midiComposition;
lbajardsilogic@0:     TempoMap               m_tempoMap;
lbajardsilogic@0: 
lbajardsilogic@0:     QString                m_path;
lbajardsilogic@0:     std::ifstream         *m_midiFile;
lbajardsilogic@0:     size_t                 m_fileSize;
lbajardsilogic@0:     QString                m_error;
lbajardsilogic@0:     size_t                 m_mainModelSampleRate;
lbajardsilogic@0: };
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: #endif // _MIDI_FILE_READER_H_