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soundfont.h
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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 <[email protected]>
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 */
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