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 */
130