diff options
Diffstat (limited to 'src/midifile.h')
| -rw-r--r-- | src/midifile.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/midifile.h b/src/midifile.h new file mode 100644 index 00000000..4ee0ddb2 --- /dev/null +++ b/src/midifile.h @@ -0,0 +1,175 @@ +// 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); + +// Free an iterator. + +void MIDI_FreeIterator(midi_track_iter_t *iter); + +// 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); + +// Reset an iterator to the beginning of a track. + +void MIDI_RestartIterator(midi_track_iter_t *iter); + +#endif /* #ifndef MIDIFILE_H */ + |