Edit File: seq_kernel.h
#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> * * * 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 * */ #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 events dequeued per schedule interval */ #define SNDRV_SEQ_MAX_DEQUEUE 50 /* maximum number of queues */ #define SNDRV_SEQ_MAX_QUEUES 8 /* 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 chunk */ #define SNDRV_SEQ_DEFAULT_CHUNK_EVENTS 64 /* 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 */ #define SNDRV_SEQ_MAX_HOPS 10 /* 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_dump_var_event(const struct snd_seq_event *event, snd_seq_dump_func_t func, void *private_data); /* interface for OSS emulation */ int snd_seq_set_queue_tempo(int client, struct snd_seq_queue_tempo *tempo); /* port callback routines */ void snd_port_init_callback(struct snd_seq_port_callback *p); struct snd_seq_port_callback *snd_port_alloc_callback(void); /* 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_MODULES void 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 */