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 */
17 struct 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
28 int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
29 void snd_midi_event_free(struct snd_midi_event *dev);
30 void snd_midi_event_reset_encode(struct snd_midi_event *dev);
31 void snd_midi_event_reset_decode(struct snd_midi_event *dev);
32 void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
33 bool 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 */
36 long 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
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