1 #ifndef __SOUND_SEQ_KERNEL_H
2 #define __SOUND_SEQ_KERNEL_H
5 * Main kernel header file for the ALSA sequencer
6 * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
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.
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.
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
24 #include <linux/time.h>
25 #include "asequencer.h"
27 typedef struct snd_seq_real_time snd_seq_real_time_t
;
28 typedef union snd_seq_timestamp snd_seq_timestamp_t
;
30 /* maximum number of events dequeued per schedule interval */
31 #define SNDRV_SEQ_MAX_DEQUEUE 50
33 /* maximum number of queues */
34 #define SNDRV_SEQ_MAX_QUEUES 8
36 /* max number of concurrent clients */
37 #define SNDRV_SEQ_MAX_CLIENTS 192
39 /* max number of concurrent ports */
40 #define SNDRV_SEQ_MAX_PORTS 254
42 /* max number of events in memory pool */
43 #define SNDRV_SEQ_MAX_EVENTS 2000
45 /* default number of events in memory chunk */
46 #define SNDRV_SEQ_DEFAULT_CHUNK_EVENTS 64
48 /* default number of events in memory pool */
49 #define SNDRV_SEQ_DEFAULT_EVENTS 500
51 /* max number of events in memory pool for one client (outqueue) */
52 #define SNDRV_SEQ_MAX_CLIENT_EVENTS 2000
54 /* default number of events in memory pool for one client (outqueue) */
55 #define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS 200
57 /* max delivery path length */
58 #define SNDRV_SEQ_MAX_HOPS 10
60 /* max size of event size */
61 #define SNDRV_SEQ_MAX_EVENT_LEN 0x3fffffff
63 /* call-backs for kernel port */
64 struct snd_seq_port_callback
{
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 */
77 /* interface for kernel client */
78 int snd_seq_create_kernel_client(struct snd_card
*card
, int client_index
,
79 const char *name_fmt
, ...)
80 __attribute__ ((format (printf
, 3, 4)));
81 int snd_seq_delete_kernel_client(int client
);
82 int snd_seq_kernel_client_enqueue(int client
, struct snd_seq_event
*ev
, int atomic
, int hop
);
83 int snd_seq_kernel_client_dispatch(int client
, struct snd_seq_event
*ev
, int atomic
, int hop
);
84 int snd_seq_kernel_client_ctl(int client
, unsigned int cmd
, void *arg
);
86 #define SNDRV_SEQ_EXT_MASK 0xc0000000
87 #define SNDRV_SEQ_EXT_USRPTR 0x80000000
88 #define SNDRV_SEQ_EXT_CHAINED 0x40000000
90 typedef int (*snd_seq_dump_func_t
)(void *ptr
, void *buf
, int count
);
91 int snd_seq_expand_var_event(const struct snd_seq_event
*event
, int count
, char *buf
,
92 int in_kernel
, int size_aligned
);
93 int snd_seq_dump_var_event(const struct snd_seq_event
*event
,
94 snd_seq_dump_func_t func
, void *private_data
);
96 /* interface for OSS emulation */
97 int snd_seq_set_queue_tempo(int client
, struct snd_seq_queue_tempo
*tempo
);
99 /* port callback routines */
100 void snd_port_init_callback(struct snd_seq_port_callback
*p
);
101 struct snd_seq_port_callback
*snd_port_alloc_callback(void);
103 /* port attach/detach */
104 int 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
);
106 int snd_seq_event_port_detach(int client
, int port
);
108 #ifdef CONFIG_MODULES
109 void snd_seq_autoload_lock(void);
110 void snd_seq_autoload_unlock(void);
112 #define snd_seq_autoload_lock()
113 #define snd_seq_autoload_unlock()
116 #endif /* __SOUND_SEQ_KERNEL_H */