annotate data/fileio/MIDIFileWriter.h @ 1700:c1208b211d8c single-point

Ensure test fails rather than crashing if this reader doesn't get created
author Chris Cannam <cannam@all-day-breakfast.com>
date Fri, 03 May 2019 15:02:09 +0100
parents ad5f892c0c4d
children 7e958685449d
rev   line source
Chris@301 1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
Chris@301 2
Chris@301 3 /*
Chris@301 4 Sonic Visualiser
Chris@301 5 An audio file viewer and annotation editor.
Chris@301 6 Centre for Digital Music, Queen Mary, University of London.
Chris@301 7
Chris@301 8 This program is free software; you can redistribute it and/or
Chris@301 9 modify it under the terms of the GNU General Public License as
Chris@301 10 published by the Free Software Foundation; either version 2 of the
Chris@301 11 License, or (at your option) any later version. See the file
Chris@301 12 COPYING included with this distribution for more information.
Chris@301 13 */
Chris@301 14
Chris@301 15
Chris@301 16 /*
Chris@301 17 This is a modified version of a source file from the
Chris@301 18 Rosegarden MIDI and audio sequencer and notation editor.
Chris@301 19 This file copyright 2000-2007 Richard Bown and Chris Cannam
Chris@301 20 and copyright 2007 QMUL.
Chris@301 21 */
Chris@301 22
Chris@1581 23 #ifndef SV_MIDI_FILE_WRITER_H
Chris@1581 24 #define SV_MIDI_FILE_WRITER_H
Chris@301 25
Chris@301 26 #include "base/RealTime.h"
Chris@1048 27 #include "base/BaseTypes.h"
Chris@301 28
Chris@301 29 #include <QString>
Chris@301 30
Chris@301 31 #include <vector>
Chris@301 32 #include <map>
Chris@301 33 #include <fstream>
Chris@301 34
Chris@301 35 class MIDIEvent;
Chris@852 36 class NoteExportable;
Chris@301 37
Chris@301 38 /**
Chris@301 39 * Write a MIDI file. This includes file write code for generic
Chris@301 40 * simultaneous-track MIDI files, but the conversion stage only
Chris@301 41 * supports a single-track MIDI file with fixed tempo, time signature
Chris@301 42 * and timing division.
Chris@301 43 */
Chris@301 44 class MIDIFileWriter
Chris@301 45 {
Chris@301 46 public:
Chris@852 47 MIDIFileWriter(QString path,
Chris@852 48 const NoteExportable *exportable,
Chris@1048 49 sv_samplerate_t sampleRate, // used to convert exportable sample timings
Chris@852 50 float tempo = 120.f);
Chris@301 51 virtual ~MIDIFileWriter();
Chris@301 52
Chris@301 53 virtual bool isOK() const;
Chris@301 54 virtual QString getError() const;
Chris@301 55
Chris@301 56 virtual void write();
Chris@301 57
Chris@301 58 protected:
Chris@301 59 typedef std::vector<MIDIEvent *> MIDITrack;
Chris@301 60 typedef std::map<unsigned int, MIDITrack> MIDIComposition;
Chris@301 61
Chris@301 62 typedef enum {
Chris@1429 63 MIDI_SINGLE_TRACK_FILE = 0x00,
Chris@1429 64 MIDI_SIMULTANEOUS_TRACK_FILE = 0x01,
Chris@1429 65 MIDI_SEQUENTIAL_TRACK_FILE = 0x02,
Chris@1429 66 MIDI_FILE_BAD_FORMAT = 0xFF
Chris@301 67 } MIDIFileFormatType;
Chris@301 68
Chris@301 69 std::string intToMIDIBytes(int number) const;
Chris@301 70 std::string longToMIDIBytes(unsigned long number) const;
Chris@301 71 std::string longToVarBuffer(unsigned long number) const;
Chris@301 72
Chris@301 73 unsigned long getMIDITimeForTime(RealTime t) const;
Chris@301 74
Chris@301 75 bool writeHeader();
Chris@301 76 bool writeTrack(int track);
Chris@301 77 bool writeComposition();
Chris@301 78
Chris@301 79 bool convert();
Chris@301 80
Chris@852 81 QString m_path;
Chris@852 82 const NoteExportable *m_exportable;
Chris@1048 83 sv_samplerate_t m_sampleRate;
Chris@852 84 float m_tempo;
Chris@852 85 int m_timingDivision; // pulses per quarter note
Chris@852 86 MIDIFileFormatType m_format;
Chris@852 87 unsigned int m_numberOfTracks;
Chris@301 88
Chris@852 89 MIDIComposition m_midiComposition;
Chris@301 90
Chris@852 91 std::ofstream *m_midiFile;
Chris@852 92 QString m_error;
Chris@301 93 };
Chris@301 94
Chris@301 95 #endif