LXR linux/include/sound/soundfont.h

   1#ifndef __SOUND_SOUNDFONT_H
   2#define __SOUND_SOUNDFONT_H
   3
   4/*
   5 *  Soundfont defines and definitions.
   6 *
   7 *  Copyright (C) 1999 Steve Ratcliffe
   8 *  Copyright (c) 1999-2000 Takashi iwai <tiwai@suse.de>
   9 *
  10 *   This program is free software; you can redistribute it and/or modify
  11 *   it under the terms of the GNU General Public License as published by
  12 *   the Free Software Foundation; either version 2 of the License, or
  13 *   (at your option) any later version.
  14 *
  15 *   This program is distributed in the hope that it will be useful,
  16 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 *   GNU General Public License for more details.
  19 *
  20 *   You should have received a copy of the GNU General Public License
  21 *   along with this program; if not, write to the Free Software
  22 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23 */
  24
  25#include <sound/sfnt_info.h>
  26#include <sound/util_mem.h>
  27
  28#define SF_MAX_INSTRUMENTS      128     /* maximum instrument number */
  29#define SF_MAX_PRESETS  256     /* drums are mapped from 128 to 256 */
  30#define SF_IS_DRUM_BANK(z) ((z) == 128)
  31
  32struct snd_sf_zone {
  33        struct snd_sf_zone *next;       /* Link to next */
  34        unsigned char bank;             /* Midi bank for this zone */
  35        unsigned char instr;            /* Midi program for this zone */
  36        unsigned char mapped;           /* True if mapped to something else */
  37
  38        struct soundfont_voice_info v;  /* All the soundfont parameters */
  39        int counter;
  40        struct snd_sf_sample *sample;   /* Link to sample */
  41
  42        /* The following deals with preset numbers (programs) */
  43        struct snd_sf_zone *next_instr; /* Next zone of this instrument */
  44        struct snd_sf_zone *next_zone;  /* Next zone in play list */
  45};
  46
  47struct snd_sf_sample {
  48        struct soundfont_sample_info v;
  49        int counter;
  50        struct snd_util_memblk *block;  /* allocated data block */
  51        struct snd_sf_sample *next;
  52};
  53
  54/*
  55 * This represents all the information relating to a soundfont.
  56 */
  57struct snd_soundfont {
  58        struct snd_soundfont *next;     /* Link to next */
  59        /*struct snd_soundfont *prev;*/ /* Link to previous */
  60        short  id;              /* file id */
  61        short  type;            /* font type */
  62        unsigned char name[SNDRV_SFNT_PATCH_NAME_LEN];  /* identifier */
  63        struct snd_sf_zone *zones; /* Font information */
  64        struct snd_sf_sample *samples; /* The sample headers */
  65};
  66
  67/*
  68 * Type of the sample access callback
  69 */
  70struct snd_sf_callback {
  71        void *private_data;
  72        int (*sample_new)(void *private_data, struct snd_sf_sample *sp,
  73                          struct snd_util_memhdr *hdr,
  74                          const void __user *buf, long count);
  75        int (*sample_free)(void *private_data, struct snd_sf_sample *sp,
  76                           struct snd_util_memhdr *hdr);
  77        void (*sample_reset)(void *private);
  78};
  79
  80/*
  81 * List of soundfonts.
  82 */
  83struct snd_sf_list {
  84        struct snd_soundfont *currsf; /* The currently open soundfont */
  85        int open_client;        /* client pointer for lock */
  86        int mem_used;           /* used memory size */
  87        struct snd_sf_zone *presets[SF_MAX_PRESETS];
  88        struct snd_soundfont *fonts; /* The list of soundfonts */
  89        int fonts_size; /* number of fonts allocated */
  90        int zone_counter;       /* last allocated time for zone */
  91        int sample_counter;     /* last allocated time for sample */
  92        int zone_locked;        /* locked time for zone */
  93        int sample_locked;      /* locked time for sample */
  94        struct snd_sf_callback callback;        /* callback functions */
  95        int presets_locked;
  96        struct mutex presets_mutex;
  97        spinlock_t lock;
  98        struct snd_util_memhdr *memhdr;
  99};
 100
 101/* Prototypes for soundfont.c */
 102int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
 103                       long count, int client);
 104int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
 105                                long count, int client);
 106int snd_soundfont_close_check(struct snd_sf_list *sflist, int client);
 107
 108struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback,
 109                               struct snd_util_memhdr *hdr);
 110void snd_sf_free(struct snd_sf_list *sflist);
 111
 112int snd_soundfont_remove_samples(struct snd_sf_list *sflist);
 113int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist);
 114
 115int snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,
 116                              int preset, int bank,
 117                              int def_preset, int def_bank,
 118                              struct snd_sf_zone **table, int max_layers);
 119
 120/* Parameter conversions */
 121int snd_sf_calc_parm_hold(int msec);
 122int snd_sf_calc_parm_attack(int msec);
 123int snd_sf_calc_parm_decay(int msec);
 124#define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725)
 125extern int snd_sf_vol_table[128];
 126int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio);
 127
 128
 129#endif /* __SOUND_SOUNDFONT_H */
 130