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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 <[email protected]>,
9 * Jaroslav Kysela <[email protected]>
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 */