/usr/include/allegro/midi.h is in liballegro4-dev 2:4.4.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \
* \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/
* \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/
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* \_/__/
*
* MIDI music routines.
*
* By Shawn Hargreaves.
*
* See readme.txt for copyright information.
*/
#ifndef ALLEGRO_MIDI_H
#define ALLEGRO_MIDI_H
#include "base.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Theoretical maximums: */
#define MIDI_VOICES 64 /* actual drivers may not be */
#define MIDI_TRACKS 32 /* able to handle this many */
typedef struct MIDI /* a midi file */
{
int divisions; /* number of ticks per quarter note */
struct {
unsigned char *data; /* MIDI message stream */
int len; /* length of the track data */
} track[MIDI_TRACKS];
} MIDI;
#define MIDI_AUTODETECT -1
#define MIDI_NONE 0
#define MIDI_DIGMID AL_ID('D','I','G','I')
typedef struct MIDI_DRIVER /* driver for playing midi music */
{
int id; /* driver ID code */
AL_CONST char *name; /* driver name */
AL_CONST char *desc; /* description string */
AL_CONST char *ascii_name; /* ASCII format name string */
int voices; /* available voices */
int basevoice; /* voice number offset */
int max_voices; /* maximum voices we can support */
int def_voices; /* default number of voices to use */
int xmin, xmax; /* reserved voice range */
/* setup routines */
AL_METHOD(int, detect, (int input));
AL_METHOD(int, init, (int input, int voices));
AL_METHOD(void, exit, (int input));
AL_METHOD(int, set_mixer_volume, (int volume));
AL_METHOD(int, get_mixer_volume, (void));
/* raw MIDI output to MPU-401, etc. */
AL_METHOD(void, raw_midi, (int data));
/* dynamic patch loading routines */
AL_METHOD(int, load_patches, (AL_CONST char *patches, AL_CONST char *drums));
AL_METHOD(void, adjust_patches, (AL_CONST char *patches, AL_CONST char *drums));
/* note control functions */
AL_METHOD(void, key_on, (int inst, int note, int bend, int vol, int pan));
AL_METHOD(void, key_off, (int voice));
AL_METHOD(void, set_volume, (int voice, int vol));
AL_METHOD(void, set_pitch, (int voice, int note, int bend));
AL_METHOD(void, set_pan, (int voice, int pan));
AL_METHOD(void, set_vibrato, (int voice, int amount));
} MIDI_DRIVER;
AL_VAR(MIDI_DRIVER, midi_digmid);
AL_ARRAY(_DRIVER_INFO, _midi_driver_list);
/* macros for constructing the driver lists */
#define BEGIN_MIDI_DRIVER_LIST \
_DRIVER_INFO _midi_driver_list[] = \
{
#define END_MIDI_DRIVER_LIST \
{ 0, NULL, 0 } \
};
#define MIDI_DRIVER_DIGMID \
{ MIDI_DIGMID, &midi_digmid, TRUE },
AL_VAR(MIDI_DRIVER *, midi_driver);
AL_VAR(MIDI_DRIVER *, midi_input_driver);
AL_VAR(int, midi_card);
AL_VAR(int, midi_input_card);
AL_VAR(volatile long, midi_pos); /* current position in the midi file, in beats */
AL_VAR(volatile long, midi_time); /* current position in the midi file, in seconds */
AL_VAR(long, midi_loop_start); /* where to loop back to at EOF */
AL_VAR(long, midi_loop_end); /* loop when we hit this position */
AL_FUNC(int, detect_midi_driver, (int driver_id));
AL_FUNC(MIDI *, load_midi, (AL_CONST char *filename));
AL_FUNC(void, destroy_midi, (MIDI *midi));
AL_FUNC(int, play_midi, (MIDI *midi, int loop));
AL_FUNC(int, play_looped_midi, (MIDI *midi, int loop_start, int loop_end));
AL_FUNC(void, stop_midi, (void));
AL_FUNC(void, midi_pause, (void));
AL_FUNC(void, midi_resume, (void));
AL_FUNC(int, midi_seek, (int target));
AL_FUNC(int, get_midi_length, (MIDI *midi));
AL_FUNC(void, midi_out, (unsigned char *data, int length));
AL_FUNC(int, load_midi_patches, (void));
AL_FUNCPTR(void, midi_msg_callback, (int msg, int byte1, int byte2));
AL_FUNCPTR(void, midi_meta_callback, (int type, AL_CONST unsigned char *data, int length));
AL_FUNCPTR(void, midi_sysex_callback, (AL_CONST unsigned char *data, int length));
AL_FUNCPTR(void, midi_recorder, (unsigned char data));
AL_FUNC(void, lock_midi, (struct MIDI *midi));
#ifdef __cplusplus
}
#endif
#endif /* ifndef ALLEGRO_MIDI_H */
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