projects/linux·blob master · refs

46 lines · 1.7 KiB

1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * ALSA sequencer System Client
4 * Copyright (c) 1998 by Frank van de Pol <[email protected]>
5 */
6#ifndef __SND_SEQ_SYSTEM_H
7#define __SND_SEQ_SYSTEM_H
8
9#include <sound/seq_kernel.h>
10
11
12/* entry points for broadcasting system events */
13void snd_seq_system_broadcast(int client, int port, int type, bool atomic);
14
15/* normal system notification event broadcast */
16#define notify_event(client, port, type) \
17 snd_seq_system_broadcast(client, port, type, false)
18
19/* notify UMP EP/FB change event */
20static inline void snd_seq_system_ump_notify(int client, int block, int type,
21 bool atomic)
22{
23 /* reuse the existing snd_seq_system_broadcast():
24 * struct snd_seq_ev_ump_notify is compatible with struct snd_seq_addr
25 */
26 snd_seq_system_broadcast(client, block, type, atomic);
27}
28
29#define snd_seq_system_client_ev_client_start(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_START)
30#define snd_seq_system_client_ev_client_exit(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_EXIT)
31#define snd_seq_system_client_ev_client_change(client) notify_event(client, 0, SNDRV_SEQ_EVENT_CLIENT_CHANGE)
32#define snd_seq_system_client_ev_port_start(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_START)
33#define snd_seq_system_client_ev_port_exit(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_EXIT)
34#define snd_seq_system_client_ev_port_change(client, port) notify_event(client, port, SNDRV_SEQ_EVENT_PORT_CHANGE)
35
36int snd_seq_system_notify(int client, int port, struct snd_seq_event *ev,
37 bool atomic);
38
39/* register our internal client */
40int snd_seq_system_client_init(void);
41
42/* unregister our internal client */
43void snd_seq_system_client_done(void);
44
45
46#endif