annotate data/fileio/MIDIFileReader.h @ 207:8ee6cf529c4e

* Further fix for restoring layer visibility from session file * Better handling of error state in bzip file device to avoid spurious errors * Fix #1495001 deleted layers prevail in saved session file
author Chris Cannam
date Fri, 05 Jan 2007 15:49:10 +0000
parents 1a42221a1522
children 21b9b25bff48
rev   line source
Chris@148 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@148 2
Chris@148 3 /*
Chris@148 4 Sonic Visualiser
Chris@148 5 An audio file viewer and annotation editor.
Chris@148 6 Centre for Digital Music, Queen Mary, University of London.
Chris@148 7
Chris@148 8 This program is free software; you can redistribute it and/or
Chris@148 9 modify it under the terms of the GNU General Public License as
Chris@148 10 published by the Free Software Foundation; either version 2 of the
Chris@148 11 License, or (at your option) any later version. See the file
Chris@148 12 COPYING included with this distribution for more information.
Chris@148 13 */
Chris@148 14
Chris@148 15
Chris@148 16 /*
Chris@148 17 This is a modified version of a source file from the
Chris@148 18 Rosegarden MIDI and audio sequencer and notation editor.
Chris@148 19 This file copyright 2000-2006 Richard Bown and Chris Cannam.
Chris@148 20 */
Chris@148 21
Chris@148 22 #ifndef _MIDI_FILE_READER_H_
Chris@148 23 #define _MIDI_FILE_READER_H_
Chris@148 24
Chris@148 25 #include "DataFileReader.h"
Chris@148 26 #include "base/RealTime.h"
Chris@148 27
Chris@148 28 #include <map>
Chris@148 29 #include <set>
Chris@148 30 #include <vector>
Chris@148 31
Chris@148 32 #include <QObject>
Chris@148 33
Chris@148 34 class MIDIEvent;
Chris@148 35
Chris@148 36 class MIDIFileReader : public DataFileReader, public QObject
Chris@148 37 {
Chris@148 38 public:
Chris@148 39 MIDIFileReader(QString path, size_t mainModelSampleRate);
Chris@148 40 virtual ~MIDIFileReader();
Chris@148 41
Chris@148 42 virtual bool isOK() const;
Chris@148 43 virtual QString getError() const;
Chris@148 44 virtual Model *load() const;
Chris@148 45
Chris@148 46 typedef unsigned char MIDIByte;
Chris@148 47
Chris@148 48 protected:
Chris@148 49 typedef std::vector<MIDIEvent *> MIDITrack;
Chris@148 50 typedef std::map<unsigned int, MIDITrack> MIDIComposition;
Chris@148 51 typedef std::pair<RealTime, double> TempoChange; // time, qpm
Chris@148 52 typedef std::map<unsigned long, TempoChange> TempoMap; // key is MIDI time
Chris@148 53
Chris@148 54 typedef enum {
Chris@148 55 MIDI_SINGLE_TRACK_FILE = 0x00,
Chris@148 56 MIDI_SIMULTANEOUS_TRACK_FILE = 0x01,
Chris@148 57 MIDI_SEQUENTIAL_TRACK_FILE = 0x02,
Chris@148 58 MIDI_FILE_BAD_FORMAT = 0xFF
Chris@148 59 } MIDIFileFormatType;
Chris@148 60
Chris@148 61 bool parseFile();
Chris@148 62 bool parseHeader(const std::string &midiHeader);
Chris@148 63 bool parseTrack(unsigned int &trackNum);
Chris@148 64
Chris@148 65 Model *loadTrack(unsigned int trackNum,
Chris@148 66 Model *existingModel = 0,
Chris@148 67 int minProgress = 0,
Chris@148 68 int progressAmount = 100) const;
Chris@148 69
Chris@148 70 bool consolidateNoteOffEvents(unsigned int track);
Chris@148 71 void updateTempoMap(unsigned int track);
Chris@148 72 void calculateTempoTimestamps();
Chris@148 73 RealTime getTimeForMIDITime(unsigned long midiTime) const;
Chris@148 74
Chris@148 75 // Internal convenience functions
Chris@148 76 //
Chris@148 77 int midiBytesToInt(const std::string &bytes);
Chris@148 78 long midiBytesToLong(const std::string &bytes);
Chris@148 79
Chris@148 80 long getNumberFromMIDIBytes(int firstByte = -1);
Chris@148 81
Chris@148 82 MIDIByte getMIDIByte();
Chris@148 83 std::string getMIDIBytes(unsigned long bytes);
Chris@148 84
Chris@148 85 bool skipToNextTrack();
Chris@148 86
Chris@148 87 int m_timingDivision; // pulses per quarter note
Chris@148 88 MIDIFileFormatType m_format;
Chris@148 89 unsigned int m_numberOfTracks;
Chris@148 90
Chris@148 91 long m_trackByteCount;
Chris@148 92 bool m_decrementCount;
Chris@148 93
Chris@148 94 std::map<int, QString> m_trackNames;
Chris@148 95 std::set<unsigned int> m_loadableTracks;
Chris@148 96 std::set<unsigned int> m_percussionTracks;
Chris@148 97 MIDIComposition m_midiComposition;
Chris@148 98 TempoMap m_tempoMap;
Chris@148 99
Chris@148 100 QString m_path;
Chris@148 101 std::ifstream *m_midiFile;
Chris@148 102 size_t m_fileSize;
Chris@148 103 QString m_error;
Chris@148 104 size_t m_mainModelSampleRate;
Chris@148 105 };
Chris@148 106
Chris@148 107
Chris@148 108 #endif // _MIDI_FILE_READER_H_