1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef __SOUND_SEQ_MIDI_EVENT_H
3#define __SOUND_SEQ_MIDI_EVENT_H
4
5/*
6 *  MIDI byte <-> sequencer event coder
7 *
8 *  Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
9 *                        Jaroslav Kysela <perex@perex.cz>
10 */
11
12#include <sound/asequencer.h>
13
14#define MAX_MIDI_EVENT_BUF	256
15
16/* midi status */
17struct snd_midi_event {
18	int qlen;		/* queue length */
19	int read;		/* chars read */
20	int type;		/* current event type */
21	unsigned char lastcmd;	/* last command (for MIDI state handling) */
22	unsigned char nostat;	/* no state flag */
23	int bufsize;		/* allocated buffer size */
24	unsigned char *buf;	/* input buffer */
25	spinlock_t lock;
26};
27
28int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
29void snd_midi_event_free(struct snd_midi_event *dev);
30void snd_midi_event_reset_encode(struct snd_midi_event *dev);
31void snd_midi_event_reset_decode(struct snd_midi_event *dev);
32void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
33bool snd_midi_event_encode_byte(struct snd_midi_event *dev, unsigned char c,
34				struct snd_seq_event *ev);
35/* decode from event to bytes - return number of written bytes if success */
36long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count,
37			   struct snd_seq_event *ev);
38
39#endif /* __SOUND_SEQ_MIDI_EVENT_H */
40