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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103/* SPDX-License-Identifier: GPL-2.0-or-later */#ifndef __SOUND_SEQ_KERNEL_H#define __SOUND_SEQ_KERNEL_H
/* * Main kernel header file for the ALSA sequencer * Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl> */#include <linux/time.h>#include <sound/asequencer.h>
typedef struct snd_seq_real_time snd_seq_real_time_t;typedef union snd_seq_timestamp snd_seq_timestamp_t;
/* maximum number of queues */#define SNDRV_SEQ_MAX_QUEUES 32
/* max number of concurrent clients */#define SNDRV_SEQ_MAX_CLIENTS 192
/* max number of concurrent ports */#define SNDRV_SEQ_MAX_PORTS 254
/* max number of events in memory pool */#define SNDRV_SEQ_MAX_EVENTS 2000
/* default number of events in memory pool */#define SNDRV_SEQ_DEFAULT_EVENTS 500
/* max number of events in memory pool for one client (outqueue) */#define SNDRV_SEQ_MAX_CLIENT_EVENTS 2000
/* default number of events in memory pool for one client (outqueue) */#define SNDRV_SEQ_DEFAULT_CLIENT_EVENTS 200
/* max delivery path length *//* NOTE: this shouldn't be greater than MAX_LOCKDEP_SUBCLASSES */#define SNDRV_SEQ_MAX_HOPS 8
/* max size of event size */#define SNDRV_SEQ_MAX_EVENT_LEN 0x3fffffff
/* call-backs for kernel port */struct snd_seq_port_callback { struct module *owner; void *private_data; int (*subscribe)(void *private_data, struct snd_seq_port_subscribe *info); int (*unsubscribe)(void *private_data, struct snd_seq_port_subscribe *info); int (*use)(void *private_data, struct snd_seq_port_subscribe *info); int (*unuse)(void *private_data, struct snd_seq_port_subscribe *info); int (*event_input)(struct snd_seq_event *ev, int direct, void *private_data, int atomic, int hop); void (*private_free)(void *private_data); /*...*/};
/* interface for kernel client */__printf(3, 4)int snd_seq_create_kernel_client(struct snd_card *card, int client_index, const char *name_fmt, ...);int snd_seq_delete_kernel_client(int client);int snd_seq_kernel_client_enqueue(int client, struct snd_seq_event *ev, struct file *file, bool blocking);int snd_seq_kernel_client_dispatch(int client, struct snd_seq_event *ev, int atomic, int hop);int snd_seq_kernel_client_ctl(int client, unsigned int cmd, void *arg);
#define SNDRV_SEQ_EXT_MASK 0xc0000000#define SNDRV_SEQ_EXT_USRPTR 0x80000000#define SNDRV_SEQ_EXT_CHAINED 0x40000000
typedef int (*snd_seq_dump_func_t)(void *ptr, void *buf, int count);int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf, int in_kernel, int size_aligned);int snd_seq_expand_var_event_at(const struct snd_seq_event *event, int count, char *buf, int offset);int snd_seq_dump_var_event(const struct snd_seq_event *event, snd_seq_dump_func_t func, void *private_data);
/* size of the event packet; it can be greater than snd_seq_event size */static inline size_t snd_seq_event_packet_size(struct snd_seq_event *ev){ if (snd_seq_ev_is_ump(ev)) return sizeof(struct snd_seq_ump_event); return sizeof(struct snd_seq_event);}
/* interface for OSS emulation */int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo);
/* port attach/detach */int snd_seq_event_port_attach(int client, struct snd_seq_port_callback *pcbp, int cap, int type, int midi_channels, int midi_voices, char *portname);int snd_seq_event_port_detach(int client, int port);
#ifdef CONFIG_MODULESvoid snd_seq_autoload_init(void);void snd_seq_autoload_exit(void);#else#define snd_seq_autoload_init()#define snd_seq_autoload_exit()#endif
#endif /* __SOUND_SEQ_KERNEL_H */