1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2009 Simon Howard
//
// 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.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
// MIDI file parsing.
//
//-----------------------------------------------------------------------------
#ifndef MIDIFILE_H
#define MIDIFILE_H
typedef struct midi_file_s midi_file_t;
typedef struct midi_track_iter_s midi_track_iter_t;
#define MIDI_CHANNELS_PER_TRACK 16
typedef enum
{
MIDI_EVENT_NOTE_OFF = 0x80,
MIDI_EVENT_NOTE_ON = 0x90,
MIDI_EVENT_AFTERTOUCH = 0xa0,
MIDI_EVENT_CONTROLLER = 0xb0,
MIDI_EVENT_PROGRAM_CHANGE = 0xc0,
MIDI_EVENT_CHAN_AFTERTOUCH = 0xd0,
MIDI_EVENT_PITCH_BEND = 0xe0,
MIDI_EVENT_SYSEX = 0xf0,
MIDI_EVENT_SYSEX_SPLIT = 0xf7,
MIDI_EVENT_META = 0xff,
} midi_event_type_t;
typedef enum
{
MIDI_CONTROLLER_BANK_SELECT = 0x0,
MIDI_CONTROLLER_MODULATION = 0x1,
MIDI_CONTROLLER_BREATH_CONTROL = 0x2,
MIDI_CONTROLLER_FOOT_CONTROL = 0x3,
MIDI_CONTROLLER_PORTAMENTO = 0x4,
MIDI_CONTROLLER_DATA_ENTRY = 0x5,
MIDI_CONTROLLER_MAIN_VOLUME = 0x7,
MIDI_CONTROLLER_PAN = 0xa
} midi_controller_t;
typedef enum
{
MIDI_META_SEQUENCE_NUMBER = 0x0,
MIDI_META_TEXT = 0x1,
MIDI_META_COPYRIGHT = 0x2,
MIDI_META_TRACK_NAME = 0x3,
MIDI_META_INSTR_NAME = 0x4,
MIDI_META_LYRICS = 0x5,
MIDI_META_MARKER = 0x6,
MIDI_META_CUE_POINT = 0x7,
MIDI_META_CHANNEL_PREFIX = 0x20,
MIDI_META_END_OF_TRACK = 0x2f,
MIDI_META_SET_TEMPO = 0x51,
MIDI_META_SMPTE_OFFSET = 0x54,
MIDI_META_TIME_SIGNATURE = 0x58,
MIDI_META_KEY_SIGNATURE = 0x59,
MIDI_META_SEQUENCER_SPECIFIC = 0x7f,
} midi_meta_event_type_t;
typedef struct
{
// Meta event type:
unsigned int type;
// Length:
unsigned int length;
// Meta event data:
byte *data;
} midi_meta_event_data_t;
typedef struct
{
// Length:
unsigned int length;
// Event data:
byte *data;
} midi_sysex_event_data_t;
typedef struct
{
// The channel number to which this applies:
unsigned int channel;
// Extra parameters:
unsigned int param1;
unsigned int param2;
} midi_channel_event_data_t;
typedef struct
{
// Time between the previous event and this event.
unsigned int delta_time;
// Type of event:
midi_event_type_t event_type;
union
{
midi_channel_event_data_t channel;
midi_meta_event_data_t meta;
midi_sysex_event_data_t sysex;
} data;
} midi_event_t;
// Load a MIDI file.
midi_file_t *MIDI_LoadFile(char *filename);
// Free a MIDI file.
void MIDI_FreeFile(midi_file_t *file);
// Get the time division value from the MIDI header.
unsigned int MIDI_GetFileTimeDivision(midi_file_t *file);
// Get the number of tracks in a MIDI file.
unsigned int MIDI_NumTracks(midi_file_t *file);
// Start iterating over the events in a track.
midi_track_iter_t *MIDI_IterateTrack(midi_file_t *file, unsigned int track_num);
// Get the time until the next MIDI event in a track.
unsigned int MIDI_GetDeltaTime(midi_track_iter_t *iter);
// Get a pointer to the next MIDI event.
int MIDI_GetNextEvent(midi_track_iter_t *iter, midi_event_t **event);
#endif /* #ifndef MIDIFILE_H */
|
