soundfont.h (3903B)
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 19struct 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 34struct 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 */ 44struct 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 */ 57struct 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 */ 70struct 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 */ 89int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data, 90 long count, int client); 91int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data, 92 long count, int client); 93int snd_soundfont_close_check(struct snd_sf_list *sflist, int client); 94 95struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback, 96 struct snd_util_memhdr *hdr); 97void snd_sf_free(struct snd_sf_list *sflist); 98 99int snd_soundfont_remove_samples(struct snd_sf_list *sflist); 100int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist); 101 102int 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 */ 108int snd_sf_calc_parm_hold(int msec); 109int snd_sf_calc_parm_attack(int msec); 110int snd_sf_calc_parm_decay(int msec); 111#define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725) 112extern int snd_sf_vol_table[128]; 113int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio); 114 115 116#endif /* __SOUND_SOUNDFONT_H */