1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* ALSA sequencer Client Manager
* Copyright (c) 1998-1999 by Frank van de Pol <fvdpol@coil.demon.nl>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __SND_SEQ_CLIENTMGR_H
#define __SND_SEQ_CLIENTMGR_H
#include <sound/seq_kernel.h>
#include <linux/bitops.h>
#include "seq_fifo.h"
#include "seq_ports.h"
#include "seq_lock.h"
/* client manager */
struct _snd_seq_user_client {
struct file *file; /* file struct of client */
/* ... */
/* fifo */
fifo_t *fifo; /* queue for incoming events */
int fifo_pool_size;
};
struct _snd_seq_kernel_client {
snd_card_t *card;
/* pointer to client functions */
void *private_data; /* private data for client */
/* ... */
};
struct _snd_seq_client {
snd_seq_client_type_t type;
unsigned int accept_input: 1,
accept_output: 1;
char name[64]; /* client name */
int number; /* client number */
unsigned int filter; /* filter flags */
DECLARE_BITMAP(event_filter, 256);
snd_use_lock_t use_lock;
int event_lost;
/* ports */
int num_ports; /* number of ports */
struct list_head ports_list_head;
rwlock_t ports_lock;
struct semaphore ports_mutex;
int convert32; /* convert 32->64bit */
/* output pool */
pool_t *pool; /* memory pool for this client */
union {
user_client_t user;
kernel_client_t kernel;
} data;
};
/* usage statistics */
typedef struct {
int cur;
int peak;
} usage_t;
extern int client_init_data(void);
extern int snd_sequencer_device_init(void);
extern void snd_sequencer_device_done(void);
/* get locked pointer to client */
extern client_t *snd_seq_client_use_ptr(int clientid);
/* unlock pointer to client */
#define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
/* dispatch event to client(s) */
extern int snd_seq_dispatch_event(snd_seq_event_cell_t *cell, int atomic, int hop);
/* exported to other modules */
extern int snd_seq_register_kernel_client(snd_seq_client_callback_t *callback, void *private_data);
extern int snd_seq_unregister_kernel_client(int client);
extern int snd_seq_kernel_client_enqueue(int client, snd_seq_event_t *ev, int atomic, int hop);
int snd_seq_kernel_client_enqueue_blocking(int client, snd_seq_event_t * ev, struct file *file, int atomic, int hop);
int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
int snd_seq_client_notify_subscription(int client, int port, snd_seq_port_subscribe_t *info, int evtype);
#endif
|
