Root/include/sound/soundfont.h

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
32struct 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
47struct 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 */
57struct 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 */
70struct 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 */
83struct 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 */
102int snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
103               long count, int client);
104int snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
105                long count, int client);
106int snd_soundfont_close_check(struct snd_sf_list *sflist, int client);
107
108struct snd_sf_list *snd_sf_new(struct snd_sf_callback *callback,
109                   struct snd_util_memhdr *hdr);
110void snd_sf_free(struct snd_sf_list *sflist);
111
112int snd_soundfont_remove_samples(struct snd_sf_list *sflist);
113int snd_soundfont_remove_unlocked(struct snd_sf_list *sflist);
114
115int 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 */
121int snd_sf_calc_parm_hold(int msec);
122int snd_sf_calc_parm_attack(int msec);
123int snd_sf_calc_parm_decay(int msec);
124#define snd_sf_calc_parm_delay(msec) (0x8000 - (msec) * 1000 / 725)
125extern int snd_sf_vol_table[128];
126int snd_sf_linear_to_log(unsigned int amount, int offset, int ratio);
127
128
129#endif /* __SOUND_SOUNDFONT_H */
130

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