1#ifndef __SOUND_SEQ_KERNEL_H
2#define __SOUND_SEQ_KERNEL_H
3
4/*
5 *  Main kernel header file for the ALSA sequencer
6 *  Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
7 *
8 *
9 *   This program is free software; you can redistribute it and/or modify
10 *   it under the terms of the GNU General Public License as published by
11 *   the Free Software Foundation; either version 2 of the License, or
12 *   (at your option) any later version.
13 *
14 *   This program is distributed in the hope that it will be useful,
15 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *   GNU General Public License for more details.
18 *
19 *   You should have received a copy of the GNU General Public License
20 *   along with this program; if not, write to the Free Software
21 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22 *
23 */
24#include <linux/time.h>
25#include <sound/asequencer.h>
26
27typedef struct snd_seq_real_time snd_seq_real_time_t;
28typedef union snd_seq_timestamp snd_seq_timestamp_t;
29
30/* maximum number of queues */
31#define SNDRV_SEQ_MAX_QUEUES		32
32
33/* max number of concurrent clients */
34#define SNDRV_SEQ_MAX_CLIENTS 		192
35
36/* max number of concurrent ports */
37#define SNDRV_SEQ_MAX_PORTS 		254
38
39/* max number of events in memory pool */
40#define SNDRV_SEQ_MAX_EVENTS		2000
41
42/* default number of events in memory pool */
43#define SNDRV_SEQ_DEFAULT_EVENTS	500
44
45/* max number of events in memory pool for one client (outqueue) */
46#define SNDRV_SEQ_MAX_CLIENT_EVENTS	2000
47
48/* default number of events in memory pool for one client (outqueue) */
49#define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS	200
50
51/* max delivery path length */
52#define SNDRV_SEQ_MAX_HOPS		10
53
54/* max size of event size */
55#define SNDRV_SEQ_MAX_EVENT_LEN		0x3fffffff
56
57/* call-backs for kernel port */
58struct snd_seq_port_callback {
59	struct module *owner;
60	void *private_data;
61	int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info);
62	int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info);
63	int (*use)(void *private_data, struct snd_seq_port_subscribe *info);
64	int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info);
65	int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
66	void (*private_free)(void *private_data);
67	/*...*/
68};
69
70/* interface for kernel client */
71__printf(3, 4)
72int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
73				 const char *name_fmt, ...);
74int snd_seq_delete_kernel_client(int client);
75int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
76int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);
77int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
78
79#define SNDRV_SEQ_EXT_MASK	0xc0000000
80#define SNDRV_SEQ_EXT_USRPTR	0x80000000
81#define SNDRV_SEQ_EXT_CHAINED	0x40000000
82
83typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);
84int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf,
85			     int in_kernel, int size_aligned);
86int snd_seq_dump_var_event(const struct snd_seq_event *event,
87			   snd_seq_dump_func_t func, void *private_data);
88
89/* interface for OSS emulation */
90int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
91
92/* port callback routines */
93void snd_port_init_callback(struct snd_seq_port_callback *p);
94struct snd_seq_port_callback *snd_port_alloc_callback(void);
95
96/* port attach/detach */
97int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp,
98			      int cap, int type, int midi_channels, int midi_voices, char *portname);
99int snd_seq_event_port_detach(int client, int port);
100
101#ifdef CONFIG_MODULES
102void snd_seq_autoload_init(void);
103void snd_seq_autoload_exit(void);
104#else
105#define snd_seq_autoload_init()
106#define snd_seq_autoload_exit()
107#endif
108
109#endif /* __SOUND_SEQ_KERNEL_H */
110