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