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
  32 struct 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
  47 struct 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  */
  57 struct 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  */
  70 struct 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  */
  83 struct 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 */
 102 int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
 103                        long count, int client);
 104 int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
 105                                 long count, int client);
 106 int snd_soundfont_close_check(struct snd_sf_list *sflist, int client);
 107
 108 struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback,
 109                                struct snd_util_memhdr *hdr);
 110 void snd_sf_free(struct snd_sf_list *sflist);
 111
 112 int snd_soundfont_remove_samples(struct snd_sf_list *sflist);
 113 int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist);
 114
 115 int 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 */
 121 int snd_sf_calc_parm_hold(int msec);
 122 int snd_sf_calc_parm_attack(int msec);
 123 int snd_sf_calc_parm_decay(int msec);
 124 #define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725)
 125 extern int snd_sf_vol_table[128];
 126 int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio);
 127
 128
 129 #endif /* __SOUND_SOUNDFONT_H */