#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 "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);

  	unsigned int callback_all;	/* call subscribe callbacks at each connection/disconnection */
  	/*...*/

  };

  
  /* 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, int atomic, int hop);
  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_lock(void);
  void snd_seq_autoload_unlock(void);
  #else
  #define snd_seq_autoload_lock()
  #define snd_seq_autoload_unlock()
  #endif
  
  #endif /* __SOUND_SEQ_KERNEL_H */