root/include/sound/soundfont.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef __SOUND_SOUNDFONT_H
   3 #define __SOUND_SOUNDFONT_H
   4 
   5 /*
   6  *  Soundfont defines and definitions.
   7  *
   8  *  Copyright (C) 1999 Steve Ratcliffe
   9  *  Copyright (c) 1999-2000 Takashi iwai <tiwai@suse.de>
  10  */
  11 
  12 #include <sound/sfnt_info.h>
  13 #include <sound/util_mem.h>
  14 
  15 #define SF_MAX_INSTRUMENTS      128     /* maximum instrument number */
  16 #define SF_MAX_PRESETS  256     /* drums are mapped from 128 to 256 */
  17 #define SF_IS_DRUM_BANK(z) ((z) == 128)
  18 
  19 struct snd_sf_zone {
  20         struct snd_sf_zone *next;       /* Link to next */
  21         unsigned char bank;             /* Midi bank for this zone */
  22         unsigned char instr;            /* Midi program for this zone */
  23         unsigned char mapped;           /* True if mapped to something else */
  24 
  25         struct soundfont_voice_info v;  /* All the soundfont parameters */
  26         int counter;
  27         struct snd_sf_sample *sample;   /* Link to sample */
  28 
  29         /* The following deals with preset numbers (programs) */
  30         struct snd_sf_zone *next_instr; /* Next zone of this instrument */
  31         struct snd_sf_zone *next_zone;  /* Next zone in play list */
  32 };
  33 
  34 struct snd_sf_sample {
  35         struct soundfont_sample_info v;
  36         int counter;
  37         struct snd_util_memblk *block;  /* allocated data block */
  38         struct snd_sf_sample *next;
  39 };
  40 
  41 /*
  42  * This represents all the information relating to a soundfont.
  43  */
  44 struct snd_soundfont {
  45         struct snd_soundfont *next;     /* Link to next */
  46         /*struct snd_soundfont *prev;*/ /* Link to previous */
  47         short  id;              /* file id */
  48         short  type;            /* font type */
  49         unsigned char name[SNDRV_SFNT_PATCH_NAME_LEN];  /* identifier */
  50         struct snd_sf_zone *zones; /* Font information */
  51         struct snd_sf_sample *samples; /* The sample headers */
  52 };
  53 
  54 /*
  55  * Type of the sample access callback
  56  */
  57 struct snd_sf_callback {
  58         void *private_data;
  59         int (*sample_new)(void *private_data, struct snd_sf_sample *sp,
  60                           struct snd_util_memhdr *hdr,
  61                           const void __user *buf, long count);
  62         int (*sample_free)(void *private_data, struct snd_sf_sample *sp,
  63                            struct snd_util_memhdr *hdr);
  64         void (*sample_reset)(void *private);
  65 };
  66 
  67 /*
  68  * List of soundfonts.
  69  */
  70 struct snd_sf_list {
  71         struct snd_soundfont *currsf; /* The currently open soundfont */
  72         int open_client;        /* client pointer for lock */
  73         int mem_used;           /* used memory size */
  74         struct snd_sf_zone *presets[SF_MAX_PRESETS];
  75         struct snd_soundfont *fonts; /* The list of soundfonts */
  76         int fonts_size; /* number of fonts allocated */
  77         int zone_counter;       /* last allocated time for zone */
  78         int sample_counter;     /* last allocated time for sample */
  79         int zone_locked;        /* locked time for zone */
  80         int sample_locked;      /* locked time for sample */
  81         struct snd_sf_callback callback;        /* callback functions */
  82         int presets_locked;
  83         struct mutex presets_mutex;
  84         spinlock_t lock;
  85         struct snd_util_memhdr *memhdr;
  86 };
  87 
  88 /* Prototypes for soundfont.c */
  89 int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
  90                        long count, int client);
  91 int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
  92                                 long count, int client);
  93 int snd_soundfont_close_check(struct snd_sf_list *sflist, int client);
  94 
  95 struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback,
  96                                struct snd_util_memhdr *hdr);
  97 void snd_sf_free(struct snd_sf_list *sflist);
  98 
  99 int snd_soundfont_remove_samples(struct snd_sf_list *sflist);
 100 int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist);
 101 
 102 int snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,
 103                               int preset, int bank,
 104                               int def_preset, int def_bank,
 105                               struct snd_sf_zone **table, int max_layers);
 106 
 107 /* Parameter conversions */
 108 int snd_sf_calc_parm_hold(int msec);
 109 int snd_sf_calc_parm_attack(int msec);
 110 int snd_sf_calc_parm_decay(int msec);
 111 #define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725)
 112 extern int snd_sf_vol_table[128];
 113 int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio);
 114 
 115 
 116 #endif /* __SOUND_SOUNDFONT_H */