root/include/sound/soundfont.h

INCLUDED FROM

#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 */