1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * ALSA sequencer Client Manager
6 #ifndef __SND_SEQ_CLIENTMGR_H
7 #define __SND_SEQ_CLIENTMGR_H
9 #include <sound/seq_kernel.h>
10 #include <linux/bitops.h>
12 #include "seq_ports.h"
17 struct snd_seq_user_client {
18 struct file *file; /* file struct of client */
23 struct snd_seq_fifo *fifo; /* queue for incoming events */
27 struct snd_seq_kernel_client {
29 struct snd_card *card;
33 struct snd_seq_client {
34 snd_seq_client_type_t type;
35 unsigned int accept_input: 1,
37 unsigned int midi_version;
38 unsigned int user_pversion;
39 char name[64]; /* client name */
40 int number; /* client number */
41 unsigned int filter; /* filter flags */
42 DECLARE_BITMAP(event_filter, 256);
43 unsigned short group_filter;
44 snd_use_lock_t use_lock;
47 int num_ports; /* number of ports */
48 struct list_head ports_list_head;
50 struct mutex ports_mutex;
51 struct mutex ioctl_mutex;
52 int convert32; /* convert 32->64bit */
53 int ump_endpoint_port;
56 struct snd_seq_pool *pool; /* memory pool for this client */
59 struct snd_seq_user_client user;
60 struct snd_seq_kernel_client kernel;
67 /* usage statistics */
68 struct snd_seq_usage {
74 int client_init_data(void);
75 int snd_sequencer_device_init(void);
76 void snd_sequencer_device_done(void);
78 /* get locked pointer to client */
79 struct snd_seq_client *snd_seq_client_use_ptr(int clientid);
81 /* unlock pointer to client */
82 #define snd_seq_client_unlock(client) snd_use_lock_free(&(client)->use_lock)
84 /* dispatch event to client(s) */
85 int snd_seq_dispatch_event(struct snd_seq_event_cell *cell, int atomic, int hop);
87 int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table *wait);
88 int snd_seq_client_notify_subscription(int client, int port,
89 struct snd_seq_port_subscribe *info, int evtype);
91 int __snd_seq_deliver_single_event(struct snd_seq_client *dest,
92 struct snd_seq_client_port *dest_port,
93 struct snd_seq_event *event,
96 /* only for OSS sequencer */
97 bool snd_seq_client_ioctl_lock(int clientid);
98 void snd_seq_client_ioctl_unlock(int clientid);
100 extern int seq_client_load[15];
102 /* for internal use between kernel sequencer clients */
103 struct snd_seq_client *snd_seq_kernel_client_get(int client);
104 void snd_seq_kernel_client_put(struct snd_seq_client *cptr);
106 static inline bool snd_seq_client_is_ump(struct snd_seq_client *c)
108 return c->midi_version != SNDRV_SEQ_CLIENT_LEGACY_MIDI;
111 static inline bool snd_seq_client_is_midi2(struct snd_seq_client *c)
113 return c->midi_version == SNDRV_SEQ_CLIENT_UMP_MIDI_2_0;