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 */
117