Root/include/sound/seq_midi_event.h

1#ifndef __SOUND_SEQ_MIDI_EVENT_H
2#define __SOUND_SEQ_MIDI_EVENT_H
3
4/*
5 * MIDI byte <-> sequencer event coder
6 *
7 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>,
8 * Jaroslav Kysela <perex@perex.cz>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25#include <sound/asequencer.h>
26
27#define MAX_MIDI_EVENT_BUF 256
28
29/* midi status */
30struct snd_midi_event {
31    int qlen; /* queue length */
32    int read; /* chars read */
33    int type; /* current event type */
34    unsigned char lastcmd; /* last command (for MIDI state handling) */
35    unsigned char nostat; /* no state flag */
36    int bufsize; /* allocated buffer size */
37    unsigned char *buf; /* input buffer */
38    spinlock_t lock;
39};
40
41int snd_midi_event_new(int bufsize, struct snd_midi_event **rdev);
42void snd_midi_event_free(struct snd_midi_event *dev);
43void snd_midi_event_reset_encode(struct snd_midi_event *dev);
44void snd_midi_event_reset_decode(struct snd_midi_event *dev);
45void snd_midi_event_no_status(struct snd_midi_event *dev, int on);
46/* encode from byte stream - return number of written bytes if success */
47long snd_midi_event_encode(struct snd_midi_event *dev, unsigned char *buf, long count,
48               struct snd_seq_event *ev);
49int snd_midi_event_encode_byte(struct snd_midi_event *dev, int c, struct snd_seq_event *ev);
50/* decode from event to bytes - return number of written bytes if success */
51long snd_midi_event_decode(struct snd_midi_event *dev, unsigned char *buf, long count,
52               struct snd_seq_event *ev);
53
54#endif /* __SOUND_SEQ_MIDI_EVENT_H */
55

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