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/*
Rosegarden
A sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <[email protected]>,
Chris Cannam <[email protected]>,
Richard Bown <[email protected]>
The moral right of the authors to claim authorship of this work
has been asserted.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
#ifndef _ROSEGARDEN_MIDI_FILE_H_
#define _ROSEGARDEN_MIDI_FILE_H_
#include <fstream>
#include <string>
#include <list>
#include <map>
#include <tqobject.h>
#include "Midi.h"
#include "MidiEvent.h"
#include "Composition.h"
#include "SoundFile.h"
// Conversion class for Composition to and
// from MIDI Files. Despite the fact you can reuse this
// object it's probably safer just to create it for a
// single way conversion and then throw it away (MIDI
// to Composition conversion invalidates the internal
// MIDI model).
//
// Derived from SoundFile but still had some features
// in common with it which could theoretically be moved
// up into the base for use in other derived classes.
//
// [rwb]
//
//
namespace Rosegarden
{
// Our internal MIDI structure is just a list of MidiEvents.
// We use a list and not a set because we want the order of
// the events to be arbitrary until we explicitly sort them
// (necessary when converting Composition absolute times to
// MIDI delta times).
//
typedef std::vector<MidiEvent *> MidiTrack;
typedef std::map<unsigned int, MidiTrack> MidiComposition;
class Studio;
class MidiFile : public TQObject, public SoundFile
{
Q_OBJECT
public:
typedef enum
{
MIDI_SINGLE_TRACK_FILE = 0x00,
MIDI_SIMULTANEOUS_TRACK_FILE = 0x01,
MIDI_SEQUENTIAL_TRACK_FILE = 0x02,
MIDI_CONVERTED_TO_APPLICATION = 0xFE,
MIDI_FILE_NOT_LOADED = 0xFF
} MIDIFileFormatType;
typedef enum
{
CONVERT_REPLACE,
CONVERT_AUGMENT,
CONVERT_APPEND
} ConversionType;
MidiFile(Studio *studio);
MidiFile (const std::string &fn, Studio *studio);
~MidiFile();
// Declare our virtuals
//
virtual bool open();
virtual bool write();
virtual void close();
int timingDivision() { return m_timingDivision; }
MIDIFileFormatType format() { return m_format; }
unsigned int numberOfTracks() { return m_numberOfTracks; }
bool hasTimeChanges() { return m_containsTimeChanges; }
// If a file open or save failed
std::string getError() { return m_error; }
/**
* Convert a MIDI file to a Rosegarden composition. Return true
* for success.
*/
bool convertToRosegarden(Composition &c, ConversionType type);
/**
* Convert a Rosegarden composition to MIDI format, storing the
* result internally for later writing.
*/
void convertToMidi(Composition &comp);
signals:
void setProgress(int);
void incrementProgress(int);
private:
int m_timingDivision; // pulses per quarter note
MIDIFileFormatType m_format;
unsigned int m_numberOfTracks;
bool m_containsTimeChanges;
// Internal counters
//
long m_trackByteCount;
bool m_decrementCount;
// Internal MidiComposition
//
MidiComposition m_midiComposition;
std::map<int, int> m_trackChannelMap;
// Clear the m_midiComposition
//
void clearMidiComposition();
// Split the tasks up with these top level private methods
//
bool parseHeader(const std::string& midiHeader);
bool parseTrack(std::ifstream* midiFile, unsigned int &trackNum);
bool writeHeader(std::ofstream* midiFile);
bool writeTrack(std::ofstream* midiFile, unsigned int trackNum);
bool consolidateNoteOffEvents(TrackId track);
// Internal convenience functions
//
int midiBytesToInt(const std::string& bytes);
long midiBytesToLong(const std::string& bytes);
long getNumberFromMidiBytes(std::ifstream* midiFile, int firstByte = -1);
MidiByte getMidiByte(std::ifstream* midiFile);
std::string getMidiBytes(std::ifstream* midiFile,
unsigned long bytes);
bool skipToNextTrack(std::ifstream *midiFile);
void intToMidiBytes(std::ofstream* midiFile, int number);
void longToMidiBytes(std::ofstream* midiFile, unsigned long number);
std::string longToVarBuffer(unsigned long number);
// The pointer to the Studio for Instrument stuff
//
Studio *m_studio;
std::string m_error;
};
}
#endif // _ROSEGARDEN_MIDI_FILE_H_
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