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);
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 */
117
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