Simple MIDI file reader

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*

   This is a modified version of a source file from the 

   Rosegarden MIDI and audio sequencer and notation editor.

   This file copyright 2000-2006 Richard Bown and Chris Cannam.

*/

#ifndef _MIDI_FILE_READER_H_

#define _MIDI_FILE_READER_H_

#include <QObject>

#include <QList>

#include <QMap>

#include <QSet>

#include <iostream>

#include "MIDIComposition.h"

typedef unsigned char MIDIByte;

class MIDIFileReader

{

public:

    MIDIFileReader(QString path);

    virtual ~MIDIFileReader();

    virtual bool isOK() const;

    virtual QString getError() const;

    virtual MIDIComposition load() const;

    MIDIConstants::MIDIFileFormatType getFormat() const { return m_format; }

    int getTimingDivision() const { return m_timingDivision; }

protected:

    bool parseFile();

    bool parseHeader(const std::string &midiHeader);

    bool parseTrack(unsigned int trackNum);

    bool consolidateNoteOffEvents(unsigned int track);

    // Internal convenience functions

    //

    int  midiBytesToInt(const std::string &bytes);

    long midiBytesToLong(const std::string &bytes);

    long getNumberFromMIDIBytes(int firstByte = -1);

    MIDIByte getMIDIByte();

    std::string getMIDIBytes(unsigned long bytes);

    bool skipToNextTrack();

    int                    m_timingDivision;   // pulses per quarter note

    MIDIConstants::MIDIFileFormatType m_format;

    unsigned int           m_numberOfTracks;

    long                   m_trackByteCount;

    bool                   m_decrementCount;

    QMap<int, QString>     m_trackNames;

    MIDIComposition        m_midiComposition;

    QString                m_path;

    std::ifstream         *m_midiFile;

    size_t                 m_fileSize;

    QString                m_error;

};

#endif // _MIDI_FILE_READER_H_