#ifndef __SOUND_SEQ_DEVICE_H
  #define __SOUND_SEQ_DEVICE_H
  
  /*
   *  ALSA sequencer device management
   *  Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
   *
   *   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
   *
   */
  
  /*
   * registered device information
   */
  
  #define ID_LEN	32
  
  /* status flag */
  #define SNDRV_SEQ_DEVICE_FREE		0
  #define SNDRV_SEQ_DEVICE_REGISTERED	1
  
  struct snd_seq_device {
  	/* device info */
  	struct snd_card *card;	/* sound card */
  	int device;		/* device number */
  	char id[ID_LEN];	/* driver id */
  	char name[80];		/* device name */
  	int argsize;		/* size of the argument */
  	void *driver_data;	/* private data for driver */
  	int status;		/* flag - read only */
  	void *private_data;	/* private data for the caller */
  	void (*private_free)(struct snd_seq_device *device);
  	struct list_head list;	/* link to next device */
  };
  
  
  /* driver operators
   * init_device:
   *	Initialize the device with given parameters.
   *	Typically,
   *		1. call snd_hwdep_new
   *		2. allocate private data and initialize it
   *		3. call snd_hwdep_register
   *		4. store the instance to dev->driver_data pointer.
   *		
   * free_device:
   *	Release the private data.
   *	Typically, call snd_device_free(dev->card, dev->driver_data)
   */
  struct snd_seq_dev_ops {
  	int (*init_device)(struct snd_seq_device *dev);
  	int (*free_device)(struct snd_seq_device *dev);
  };
  
  /*
   * prototypes
   */
  void snd_seq_device_load_drivers(void);
  int snd_seq_device_new(struct snd_card *card, int device, char *id, int argsize, struct snd_seq_device **result);
  int snd_seq_device_register_driver(char *id, struct snd_seq_dev_ops *entry, int argsize);
  int snd_seq_device_unregister_driver(char *id);
  
  #define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
  
  
  /*
   * id strings for generic devices
   */
  #define SNDRV_SEQ_DEV_ID_MIDISYNTH	"seq-midi"
  #define SNDRV_SEQ_DEV_ID_OPL3		"opl3-synth"
  
  #endif /* __SOUND_SEQ_DEVICE_H */