#ifndef __SOUND_SOUNDFONT_H
  #define __SOUND_SOUNDFONT_H
  
  /*
   *  Soundfont defines and definitions.
   *
   *  Copyright (C) 1999 Steve Ratcliffe
   *  Copyright (c) 1999-2000 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
   */
  
  #include "sfnt_info.h"
  #include "util_mem.h"
  
  #define SF_MAX_INSTRUMENTS	128	/* maximum instrument number */
  #define SF_MAX_PRESETS  256	/* drums are mapped from 128 to 256 */
  #define SF_IS_DRUM_BANK(z) ((z) == 128)

  struct snd_sf_zone {

  	struct snd_sf_zone *next;	/* Link to next */
  	unsigned char bank;		/* Midi bank for this zone */
  	unsigned char instr;		/* Midi program for this zone */
  	unsigned char mapped;		/* True if mapped to something else */

  	struct soundfont_voice_info v;	/* All the soundfont parameters */

  	int counter;
  	struct snd_sf_sample *sample;	/* Link to sample */
  
  	/* The following deals with preset numbers (programs) */
  	struct snd_sf_zone *next_instr;	/* Next zone of this instrument */
  	struct snd_sf_zone *next_zone;	/* Next zone in play list */

  };

  struct snd_sf_sample {
  	struct soundfont_sample_info v;

  	int counter;

  	struct snd_util_memblk *block;	/* allocated data block */

  	struct snd_sf_sample *next;

  };

  
  /*
   * This represents all the information relating to a soundfont.
   */

  struct snd_soundfont {

  	struct snd_soundfont *next;	/* Link to next */
  	/*struct snd_soundfont *prev;*/	/* Link to previous */
  	short  id;		/* file id */
  	short  type;		/* font type */
  	unsigned char name[SNDRV_SFNT_PATCH_NAME_LEN];	/* identifier */

  	struct snd_sf_zone *zones; /* Font information */
  	struct snd_sf_sample *samples; /* The sample headers */
  };

  
  /*
   * Type of the sample access callback
   */

  struct snd_sf_callback {

  	void *private_data;

  	int (*sample_new)(void *private_data, struct snd_sf_sample *sp,
  			  struct snd_util_memhdr *hdr,
  			  const void __user *buf, long count);
  	int (*sample_free)(void *private_data, struct snd_sf_sample *sp,
  			   struct snd_util_memhdr *hdr);
  	void (*sample_reset)(void *private);
  };

  
  /*
   * List of soundfonts.
   */

  struct snd_sf_list {
  	struct snd_soundfont *currsf; /* The currently open soundfont */

  	int open_client;	/* client pointer for lock */
  	int mem_used;		/* used memory size */

  	struct snd_sf_zone *presets[SF_MAX_PRESETS];
  	struct snd_soundfont *fonts; /* The list of soundfonts */

  	int fonts_size;	/* number of fonts allocated */
  	int zone_counter;	/* last allocated time for zone */
  	int sample_counter;	/* last allocated time for sample */
  	int zone_locked;	/* locked time for zone */
  	int sample_locked;	/* locked time for sample */

  	struct snd_sf_callback callback;	/* callback functions */

  	int presets_locked;

  	struct mutex presets_mutex;

  	spinlock_t lock;

  	struct snd_util_memhdr *memhdr;
  };

  
  /* Prototypes for soundfont.c */

  int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
  		       long count, int client);
  int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,

  				long count, int client);

  int snd_soundfont_close_check(struct snd_sf_list *sflist, int client);

  struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback,
  			       struct snd_util_memhdr *hdr);
  void snd_sf_free(struct snd_sf_list *sflist);

  int snd_soundfont_remove_samples(struct snd_sf_list *sflist);
  int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist);

  int snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,

  			      int preset, int bank,
  			      int def_preset, int def_bank,

  			      struct snd_sf_zone **table, int max_layers);

  
  /* Parameter conversions */
  int snd_sf_calc_parm_hold(int msec);
  int snd_sf_calc_parm_attack(int msec);
  int snd_sf_calc_parm_decay(int msec);

  #define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725)

  extern int snd_sf_vol_table[128];
  int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio);
  
  
  #endif /* __SOUND_SOUNDFONT_H */