annotate data/fileio/MIDIFileReader.h @ 845:a299c4cec0f8

Likewise, but for toLocal8Bit().data()
author Chris Cannam
date Tue, 26 Nov 2013 13:48:13 +0000
parents eb1b517f5eeb
children 59e7fe1b1003
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@301 36 typedef unsigned char MIDIByte;
Chris@301 37
Chris@392 38 class MIDIFileImportPreferenceAcquirer // welcome to our grand marble foyer
Chris@392 39 {
Chris@392 40 public:
Chris@392 41 enum TrackPreference {
Chris@392 42 ImportNothing,
Chris@392 43 ImportSingleTrack,
Chris@392 44 MergeAllTracks,
Chris@392 45 MergeAllNonPercussionTracks
Chris@392 46 };
Chris@392 47
Chris@392 48 virtual ~MIDIFileImportPreferenceAcquirer() { }
Chris@392 49
Chris@392 50 virtual TrackPreference getTrackImportPreference
Chris@392 51 (QStringList trackNames, bool haveSomePercussion,
Chris@392 52 QString &singleTrack) const = 0;
Chris@392 53
Chris@392 54 virtual void showError(QString error) = 0;
Chris@392 55 };
Chris@392 56
Chris@392 57
Chris@248 58 class MIDIFileReader : public DataFileReader
Chris@148 59 {
Chris@247 60 Q_OBJECT
Chris@247 61
Chris@148 62 public:
Chris@392 63 MIDIFileReader(QString path,
Chris@392 64 MIDIFileImportPreferenceAcquirer *pref,
Chris@392 65 size_t mainModelSampleRate);
Chris@148 66 virtual ~MIDIFileReader();
Chris@148 67
Chris@148 68 virtual bool isOK() const;
Chris@148 69 virtual QString getError() const;
Chris@148 70 virtual Model *load() const;
Chris@148 71
Chris@148 72 protected:
Chris@148 73 typedef std::vector<MIDIEvent *> MIDITrack;
Chris@148 74 typedef std::map<unsigned int, MIDITrack> MIDIComposition;
Chris@148 75 typedef std::pair<RealTime, double> TempoChange; // time, qpm
Chris@148 76 typedef std::map<unsigned long, TempoChange> TempoMap; // key is MIDI time
Chris@148 77
Chris@148 78 typedef enum {
Chris@148 79 MIDI_SINGLE_TRACK_FILE = 0x00,
Chris@148 80 MIDI_SIMULTANEOUS_TRACK_FILE = 0x01,
Chris@148 81 MIDI_SEQUENTIAL_TRACK_FILE = 0x02,
Chris@148 82 MIDI_FILE_BAD_FORMAT = 0xFF
Chris@148 83 } MIDIFileFormatType;
Chris@148 84
Chris@148 85 bool parseFile();
Chris@148 86 bool parseHeader(const std::string &midiHeader);
Chris@148 87 bool parseTrack(unsigned int &trackNum);
Chris@148 88
Chris@148 89 Model *loadTrack(unsigned int trackNum,
Chris@148 90 Model *existingModel = 0,
Chris@148 91 int minProgress = 0,
Chris@148 92 int progressAmount = 100) const;
Chris@148 93
Chris@148 94 bool consolidateNoteOffEvents(unsigned int track);
Chris@148 95 void updateTempoMap(unsigned int track);
Chris@148 96 void calculateTempoTimestamps();
Chris@148 97 RealTime getTimeForMIDITime(unsigned long midiTime) const;
Chris@148 98
Chris@148 99 // Internal convenience functions
Chris@148 100 //
Chris@148 101 int midiBytesToInt(const std::string &bytes);
Chris@148 102 long midiBytesToLong(const std::string &bytes);
Chris@148 103
Chris@148 104 long getNumberFromMIDIBytes(int firstByte = -1);
Chris@148 105
Chris@148 106 MIDIByte getMIDIByte();
Chris@148 107 std::string getMIDIBytes(unsigned long bytes);
Chris@148 108
Chris@148 109 bool skipToNextTrack();
Chris@148 110
Chris@613 111 bool m_smpte;
Chris@148 112 int m_timingDivision; // pulses per quarter note
Chris@613 113 int m_fps; // if smpte
Chris@613 114 int m_subframes; // if smpte
Chris@148 115 MIDIFileFormatType m_format;
Chris@148 116 unsigned int m_numberOfTracks;
Chris@148 117
Chris@148 118 long m_trackByteCount;
Chris@148 119 bool m_decrementCount;
Chris@148 120
Chris@148 121 std::map<int, QString> m_trackNames;
Chris@148 122 std::set<unsigned int> m_loadableTracks;
Chris@148 123 std::set<unsigned int> m_percussionTracks;
Chris@148 124 MIDIComposition m_midiComposition;
Chris@148 125 TempoMap m_tempoMap;
Chris@148 126
Chris@148 127 QString m_path;
Chris@148 128 std::ifstream *m_midiFile;
Chris@148 129 size_t m_fileSize;
Chris@148 130 QString m_error;
Chris@148 131 size_t m_mainModelSampleRate;
Chris@392 132
Chris@392 133 MIDIFileImportPreferenceAcquirer *m_acquirer;
Chris@148 134 };
Chris@148 135
Chris@148 136
Chris@148 137 #endif // _MIDI_FILE_READER_H_