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 "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 events dequeued per schedule interval */
31#define SNDRV_SEQ_MAX_DEQUEUE		50
32
33/* maximum number of queues */
34#define SNDRV_SEQ_MAX_QUEUES		8
35
36/* max number of concurrent clients */
37#define SNDRV_SEQ_MAX_CLIENTS 		192
38
39/* max number of concurrent ports */
40#define SNDRV_SEQ_MAX_PORTS 		254
41
42/* max number of events in memory pool */
43#define SNDRV_SEQ_MAX_EVENTS		2000
44
45/* default number of events in memory chunk */
46#define SNDRV_SEQ_DEFAULT_CHUNK_EVENTS	64
47
48/* default number of events in memory pool */
49#define SNDRV_SEQ_DEFAULT_EVENTS	500
50
51/* max number of events in memory pool for one client (outqueue) */
52#define SNDRV_SEQ_MAX_CLIENT_EVENTS	2000
53
54/* default number of events in memory pool for one client (outqueue) */
55#define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS	200
56
57/* max delivery path length */
58#define SNDRV_SEQ_MAX_HOPS		10
59
60/* max size of event size */
61#define SNDRV_SEQ_MAX_EVENT_LEN		0x3fffffff
62
63/* call-backs for kernel port */
64struct snd_seq_port_callback {
65	struct module *owner;
66	void *private_data;
67	int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info);
68	int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info);
69	int (*use)(void *private_data, struct snd_seq_port_subscribe *info);
70	int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info);
71	int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop);
72	void (*private_free)(void *private_data);
73	unsigned int callback_all;	/* call subscribe callbacks at each connection/disconnection */
74	/*...*/
75};
76
77/* interface for kernel client */
78int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
79				 const char *name_fmt, ...)
80	__attribute__ ((format (printf, 3, 4)));
81int snd_seq_delete_kernel_client(int client);
82int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, int atomic, int hop);
83int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);
84int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
85
86#define SNDRV_SEQ_EXT_MASK	0xc0000000
87#define SNDRV_SEQ_EXT_USRPTR	0x80000000
88#define SNDRV_SEQ_EXT_CHAINED	0x40000000
89
90typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);
91int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf,
92			     int in_kernel, int size_aligned);
93int snd_seq_dump_var_event(const struct snd_seq_event *event,
94			   snd_seq_dump_func_t func, void *private_data);
95
96/* interface for OSS emulation */
97int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
98
99/* port callback routines */
100void snd_port_init_callback(struct snd_seq_port_callback *p);
101struct snd_seq_port_callback *snd_port_alloc_callback(void);
102
103/* port attach/detach */
104int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp,
105			      int cap, int type, int midi_channels, int midi_voices, char *portname);
106int snd_seq_event_port_detach(int client, int port);
107
108#ifdef CONFIG_KMOD
109void snd_seq_autoload_lock(void);
110void snd_seq_autoload_unlock(void);
111#else
112#define snd_seq_autoload_lock()
113#define snd_seq_autoload_unlock()
114#endif
115
116#endif /* __SOUND_SEQ_KERNEL_H */
117