1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * OSS compatible sequencer driver
4 *
5 * seq_oss_event.h - OSS event queue record
6 *
7 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
8 */
9
10#ifndef __SEQ_OSS_EVENT_H
11#define __SEQ_OSS_EVENT_H
12
13#include "seq_oss_device.h"
14
15#define SHORT_EVENT_SIZE 4
16#define LONG_EVENT_SIZE 8
17
18/* short event (4bytes) */
19struct evrec_short {
20 unsigned char code;
21 unsigned char parm1;
22 unsigned char dev;
23 unsigned char parm2;
24};
25
26/* short note events (4bytes) */
27struct evrec_note {
28 unsigned char code;
29 unsigned char chn;
30 unsigned char note;
31 unsigned char vel;
32};
33
34/* long timer events (8bytes) */
35struct evrec_timer {
36 unsigned char code;
37 unsigned char cmd;
38 unsigned char dummy1, dummy2;
39 unsigned int time;
40};
41
42/* long extended events (8bytes) */
43struct evrec_extended {
44 unsigned char code;
45 unsigned char cmd;
46 unsigned char dev;
47 unsigned char chn;
48 unsigned char p1, p2, p3, p4;
49};
50
51/* long channel events (8bytes) */
52struct evrec_long {
53 unsigned char code;
54 unsigned char dev;
55 unsigned char cmd;
56 unsigned char chn;
57 unsigned char p1, p2;
58 unsigned short val;
59};
60
61/* channel voice events (8bytes) */
62struct evrec_voice {
63 unsigned char code;
64 unsigned char dev;
65 unsigned char cmd;
66 unsigned char chn;
67 unsigned char note, parm;
68 unsigned short dummy;
69};
70
71/* sysex events (8bytes) */
72struct evrec_sysex {
73 unsigned char code;
74 unsigned char dev;
75 unsigned char buf[6];
76};
77
78/* event record */
79union evrec {
80 struct evrec_short s;
81 struct evrec_note n;
82 struct evrec_long l;
83 struct evrec_voice v;
84 struct evrec_timer t;
85 struct evrec_extended e;
86 struct evrec_sysex x;
87 unsigned int echo;
88 unsigned char c[LONG_EVENT_SIZE];
89};
90
91#define ev_is_long(ev) ((ev)->s.code >= 128)
92#define ev_length(ev) ((ev)->s.code >= 128 ? LONG_EVENT_SIZE : SHORT_EVENT_SIZE)
93
94int snd_seq_oss_process_event(struct seq_oss_devinfo *dp, union evrec *q, struct snd_seq_event *ev);
95int snd_seq_oss_process_timer_event(struct seq_oss_timer *rec, union evrec *q);
96int snd_seq_oss_event_input(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
97
98
99#endif /* __SEQ_OSS_EVENT_H */
100

source code of linux/sound/core/seq/oss/seq_oss_event.h