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