1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Soundfont generic routines.
4 * It is intended that these should be used by any driver that is willing
5 * to accept soundfont patches.
6 *
7 * Copyright (C) 1999 Steve Ratcliffe
8 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
9 */
10 /*
11 * Deal with reading in of a soundfont. Code follows the OSS way
12 * of doing things so that the old sfxload utility can be used.
13 * Everything may change when there is an alsa way of doing things.
14 */
15 #include <linux/uaccess.h>
16 #include <linux/slab.h>
17 #include <linux/export.h>
18 #include <sound/core.h>
19 #include <sound/soundfont.h>
20 #include <sound/seq_oss_legacy.h>
21
22 /* Prototypes for static functions */
23
24 static int open_patch(struct snd_sf_list *sflist, const char __user *data,
25 int count, int client);
26 static struct snd_soundfont *newsf(struct snd_sf_list *sflist, int type, char *name);
27 static int is_identical_font(struct snd_soundfont *sf, int type, unsigned char *name);
28 static int close_patch(struct snd_sf_list *sflist);
29 static int probe_data(struct snd_sf_list *sflist, int sample_id);
30 static void set_zone_counter(struct snd_sf_list *sflist,
31 struct snd_soundfont *sf, struct snd_sf_zone *zp);
32 static struct snd_sf_zone *sf_zone_new(struct snd_sf_list *sflist,
33 struct snd_soundfont *sf);
34 static void set_sample_counter(struct snd_sf_list *sflist,
35 struct snd_soundfont *sf, struct snd_sf_sample *sp);
36 static struct snd_sf_sample *sf_sample_new(struct snd_sf_list *sflist,
37 struct snd_soundfont *sf);
38 static void sf_sample_delete(struct snd_sf_list *sflist,
39 struct snd_soundfont *sf, struct snd_sf_sample *sp);
40 static int load_map(struct snd_sf_list *sflist, const void __user *data, int count);
41 static int load_info(struct snd_sf_list *sflist, const void __user *data, long count);
42 static int remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
43 int bank, int instr);
44 static void init_voice_info(struct soundfont_voice_info *avp);
45 static void init_voice_parm(struct soundfont_voice_parm *pp);
46 static struct snd_sf_sample *set_sample(struct snd_soundfont *sf,
47 struct soundfont_voice_info *avp);
48 static struct snd_sf_sample *find_sample(struct snd_soundfont *sf, int sample_id);
49 static int load_data(struct snd_sf_list *sflist, const void __user *data, long count);
50 static void rebuild_presets(struct snd_sf_list *sflist);
51 static void add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur);
52 static void delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp);
53 static struct snd_sf_zone *search_first_zone(struct snd_sf_list *sflist,
54 int bank, int preset, int key);
55 static int search_zones(struct snd_sf_list *sflist, int *notep, int vel,
56 int preset, int bank, struct snd_sf_zone **table,
57 int max_layers, int level);
58 static int get_index(int bank, int instr, int key);
59 static void snd_sf_init(struct snd_sf_list *sflist);
60 static void snd_sf_clear(struct snd_sf_list *sflist);
61
62 /*
63 * lock access to sflist
64 */
65 static void
lock_preset(struct snd_sf_list * sflist)66 lock_preset(struct snd_sf_list *sflist)
67 {
68 unsigned long flags;
69 mutex_lock(&sflist->presets_mutex);
70 spin_lock_irqsave(&sflist->lock, flags);
71 sflist->presets_locked = 1;
72 spin_unlock_irqrestore(&sflist->lock, flags);
73 }
74
75
76 /*
77 * remove lock
78 */
79 static void
unlock_preset(struct snd_sf_list * sflist)80 unlock_preset(struct snd_sf_list *sflist)
81 {
82 unsigned long flags;
83 spin_lock_irqsave(&sflist->lock, flags);
84 sflist->presets_locked = 0;
85 spin_unlock_irqrestore(&sflist->lock, flags);
86 mutex_unlock(&sflist->presets_mutex);
87 }
88
89
90 /*
91 * close the patch if the patch was opened by this client.
92 */
93 int
snd_soundfont_close_check(struct snd_sf_list * sflist,int client)94 snd_soundfont_close_check(struct snd_sf_list *sflist, int client)
95 {
96 unsigned long flags;
97 spin_lock_irqsave(&sflist->lock, flags);
98 if (sflist->open_client == client) {
99 spin_unlock_irqrestore(&sflist->lock, flags);
100 return close_patch(sflist);
101 }
102 spin_unlock_irqrestore(&sflist->lock, flags);
103 return 0;
104 }
105
106
107 /*
108 * Deal with a soundfont patch. Any driver could use these routines
109 * although it was designed for the AWE64.
110 *
111 * The sample_write and callargs parameters allow a callback into
112 * the actual driver to write sample data to the board or whatever
113 * it wants to do with it.
114 */
115 int
snd_soundfont_load(struct snd_sf_list * sflist,const void __user * data,long count,int client)116 snd_soundfont_load(struct snd_sf_list *sflist, const void __user *data,
117 long count, int client)
118 {
119 struct soundfont_patch_info patch;
120 unsigned long flags;
121 int rc;
122
123 if (count < (long)sizeof(patch)) {
124 snd_printk(KERN_ERR "patch record too small %ld\n", count);
125 return -EINVAL;
126 }
127 if (copy_from_user(&patch, data, sizeof(patch)))
128 return -EFAULT;
129
130 count -= sizeof(patch);
131 data += sizeof(patch);
132
133 if (patch.key != SNDRV_OSS_SOUNDFONT_PATCH) {
134 snd_printk(KERN_ERR "The wrong kind of patch %x\n", patch.key);
135 return -EINVAL;
136 }
137 if (count < patch.len) {
138 snd_printk(KERN_ERR "Patch too short %ld, need %d\n",
139 count, patch.len);
140 return -EINVAL;
141 }
142 if (patch.len < 0) {
143 snd_printk(KERN_ERR "poor length %d\n", patch.len);
144 return -EINVAL;
145 }
146
147 if (patch.type == SNDRV_SFNT_OPEN_PATCH) {
148 /* grab sflist to open */
149 lock_preset(sflist);
150 rc = open_patch(sflist, data, count, client);
151 unlock_preset(sflist);
152 return rc;
153 }
154
155 /* check if other client already opened patch */
156 spin_lock_irqsave(&sflist->lock, flags);
157 if (sflist->open_client != client) {
158 spin_unlock_irqrestore(&sflist->lock, flags);
159 return -EBUSY;
160 }
161 spin_unlock_irqrestore(&sflist->lock, flags);
162
163 lock_preset(sflist);
164 rc = -EINVAL;
165 switch (patch.type) {
166 case SNDRV_SFNT_LOAD_INFO:
167 rc = load_info(sflist, data, count);
168 break;
169 case SNDRV_SFNT_LOAD_DATA:
170 rc = load_data(sflist, data, count);
171 break;
172 case SNDRV_SFNT_CLOSE_PATCH:
173 rc = close_patch(sflist);
174 break;
175 case SNDRV_SFNT_REPLACE_DATA:
176 /*rc = replace_data(&patch, data, count);*/
177 break;
178 case SNDRV_SFNT_MAP_PRESET:
179 rc = load_map(sflist, data, count);
180 break;
181 case SNDRV_SFNT_PROBE_DATA:
182 rc = probe_data(sflist, patch.optarg);
183 break;
184 case SNDRV_SFNT_REMOVE_INFO:
185 /* patch must be opened */
186 if (!sflist->currsf) {
187 snd_printk(KERN_ERR "soundfont: remove_info: "
188 "patch not opened\n");
189 rc = -EINVAL;
190 } else {
191 int bank, instr;
192 bank = ((unsigned short)patch.optarg >> 8) & 0xff;
193 instr = (unsigned short)patch.optarg & 0xff;
194 if (! remove_info(sflist, sflist->currsf, bank, instr))
195 rc = -EINVAL;
196 else
197 rc = 0;
198 }
199 break;
200 }
201 unlock_preset(sflist);
202
203 return rc;
204 }
205
206
207 /* check if specified type is special font (GUS or preset-alias) */
208 static inline int
is_special_type(int type)209 is_special_type(int type)
210 {
211 type &= 0x0f;
212 return (type == SNDRV_SFNT_PAT_TYPE_GUS ||
213 type == SNDRV_SFNT_PAT_TYPE_MAP);
214 }
215
216
217 /* open patch; create sf list */
218 static int
open_patch(struct snd_sf_list * sflist,const char __user * data,int count,int client)219 open_patch(struct snd_sf_list *sflist, const char __user *data,
220 int count, int client)
221 {
222 struct soundfont_open_parm parm;
223 struct snd_soundfont *sf;
224 unsigned long flags;
225
226 spin_lock_irqsave(&sflist->lock, flags);
227 if (sflist->open_client >= 0 || sflist->currsf) {
228 spin_unlock_irqrestore(&sflist->lock, flags);
229 return -EBUSY;
230 }
231 spin_unlock_irqrestore(&sflist->lock, flags);
232
233 if (copy_from_user(&parm, data, sizeof(parm)))
234 return -EFAULT;
235
236 if (is_special_type(parm.type)) {
237 parm.type |= SNDRV_SFNT_PAT_SHARED;
238 sf = newsf(sflist, parm.type, NULL);
239 } else
240 sf = newsf(sflist, parm.type, parm.name);
241 if (sf == NULL) {
242 return -ENOMEM;
243 }
244
245 spin_lock_irqsave(&sflist->lock, flags);
246 sflist->open_client = client;
247 sflist->currsf = sf;
248 spin_unlock_irqrestore(&sflist->lock, flags);
249
250 return 0;
251 }
252
253 /*
254 * Allocate a new soundfont structure.
255 */
256 static struct snd_soundfont *
newsf(struct snd_sf_list * sflist,int type,char * name)257 newsf(struct snd_sf_list *sflist, int type, char *name)
258 {
259 struct snd_soundfont *sf;
260
261 /* check the shared fonts */
262 if (type & SNDRV_SFNT_PAT_SHARED) {
263 for (sf = sflist->fonts; sf; sf = sf->next) {
264 if (is_identical_font(sf, type, name)) {
265 return sf;
266 }
267 }
268 }
269
270 /* not found -- create a new one */
271 sf = kzalloc(sizeof(*sf), GFP_KERNEL);
272 if (sf == NULL)
273 return NULL;
274 sf->id = sflist->fonts_size;
275 sflist->fonts_size++;
276
277 /* prepend this record */
278 sf->next = sflist->fonts;
279 sflist->fonts = sf;
280
281 sf->type = type;
282 sf->zones = NULL;
283 sf->samples = NULL;
284 if (name)
285 memcpy(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN);
286
287 return sf;
288 }
289
290 /* check if the given name matches to the existing list */
291 static int
is_identical_font(struct snd_soundfont * sf,int type,unsigned char * name)292 is_identical_font(struct snd_soundfont *sf, int type, unsigned char *name)
293 {
294 return ((sf->type & SNDRV_SFNT_PAT_SHARED) &&
295 (sf->type & 0x0f) == (type & 0x0f) &&
296 (name == NULL ||
297 memcmp(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN) == 0));
298 }
299
300 /*
301 * Close the current patch.
302 */
303 static int
close_patch(struct snd_sf_list * sflist)304 close_patch(struct snd_sf_list *sflist)
305 {
306 unsigned long flags;
307
308 spin_lock_irqsave(&sflist->lock, flags);
309 sflist->currsf = NULL;
310 sflist->open_client = -1;
311 spin_unlock_irqrestore(&sflist->lock, flags);
312
313 rebuild_presets(sflist);
314
315 return 0;
316
317 }
318
319 /* probe sample in the current list -- nothing to be loaded */
320 static int
probe_data(struct snd_sf_list * sflist,int sample_id)321 probe_data(struct snd_sf_list *sflist, int sample_id)
322 {
323 /* patch must be opened */
324 if (sflist->currsf) {
325 /* search the specified sample by optarg */
326 if (find_sample(sflist->currsf, sample_id))
327 return 0;
328 }
329 return -EINVAL;
330 }
331
332 /*
333 * increment zone counter
334 */
335 static void
set_zone_counter(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_zone * zp)336 set_zone_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
337 struct snd_sf_zone *zp)
338 {
339 zp->counter = sflist->zone_counter++;
340 if (sf->type & SNDRV_SFNT_PAT_LOCKED)
341 sflist->zone_locked = sflist->zone_counter;
342 }
343
344 /*
345 * allocate a new zone record
346 */
347 static struct snd_sf_zone *
sf_zone_new(struct snd_sf_list * sflist,struct snd_soundfont * sf)348 sf_zone_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
349 {
350 struct snd_sf_zone *zp;
351
352 zp = kzalloc(sizeof(*zp), GFP_KERNEL);
353 if (!zp)
354 return NULL;
355 zp->next = sf->zones;
356 sf->zones = zp;
357
358 init_voice_info(&zp->v);
359
360 set_zone_counter(sflist, sf, zp);
361 return zp;
362 }
363
364
365 /*
366 * increment sample counter
367 */
368 static void
set_sample_counter(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_sample * sp)369 set_sample_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
370 struct snd_sf_sample *sp)
371 {
372 sp->counter = sflist->sample_counter++;
373 if (sf->type & SNDRV_SFNT_PAT_LOCKED)
374 sflist->sample_locked = sflist->sample_counter;
375 }
376
377 /*
378 * allocate a new sample list record
379 */
380 static struct snd_sf_sample *
sf_sample_new(struct snd_sf_list * sflist,struct snd_soundfont * sf)381 sf_sample_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
382 {
383 struct snd_sf_sample *sp;
384
385 sp = kzalloc(sizeof(*sp), GFP_KERNEL);
386 if (!sp)
387 return NULL;
388
389 sp->next = sf->samples;
390 sf->samples = sp;
391
392 set_sample_counter(sflist, sf, sp);
393 return sp;
394 }
395
396 /*
397 * delete sample list -- this is an exceptional job.
398 * only the last allocated sample can be deleted.
399 */
400 static void
sf_sample_delete(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_sample * sp)401 sf_sample_delete(struct snd_sf_list *sflist, struct snd_soundfont *sf,
402 struct snd_sf_sample *sp)
403 {
404 /* only last sample is accepted */
405 if (sp == sf->samples) {
406 sf->samples = sp->next;
407 kfree(sp);
408 }
409 }
410
411
412 /* load voice map */
413 static int
load_map(struct snd_sf_list * sflist,const void __user * data,int count)414 load_map(struct snd_sf_list *sflist, const void __user *data, int count)
415 {
416 struct snd_sf_zone *zp, *prevp;
417 struct snd_soundfont *sf;
418 struct soundfont_voice_map map;
419
420 /* get the link info */
421 if (count < (int)sizeof(map))
422 return -EINVAL;
423 if (copy_from_user(&map, data, sizeof(map)))
424 return -EFAULT;
425
426 if (map.map_instr < 0 || map.map_instr >= SF_MAX_INSTRUMENTS)
427 return -EINVAL;
428
429 sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_MAP|SNDRV_SFNT_PAT_SHARED, NULL);
430 if (sf == NULL)
431 return -ENOMEM;
432
433 prevp = NULL;
434 for (zp = sf->zones; zp; prevp = zp, zp = zp->next) {
435 if (zp->mapped &&
436 zp->instr == map.map_instr &&
437 zp->bank == map.map_bank &&
438 zp->v.low == map.map_key &&
439 zp->v.start == map.src_instr &&
440 zp->v.end == map.src_bank &&
441 zp->v.fixkey == map.src_key) {
442 /* the same mapping is already present */
443 /* relink this record to the link head */
444 if (prevp) {
445 prevp->next = zp->next;
446 zp->next = sf->zones;
447 sf->zones = zp;
448 }
449 /* update the counter */
450 set_zone_counter(sflist, sf, zp);
451 return 0;
452 }
453 }
454
455 /* create a new zone */
456 zp = sf_zone_new(sflist, sf);
457 if (!zp)
458 return -ENOMEM;
459
460 zp->bank = map.map_bank;
461 zp->instr = map.map_instr;
462 zp->mapped = 1;
463 if (map.map_key >= 0) {
464 zp->v.low = map.map_key;
465 zp->v.high = map.map_key;
466 }
467 zp->v.start = map.src_instr;
468 zp->v.end = map.src_bank;
469 zp->v.fixkey = map.src_key;
470 zp->v.sf_id = sf->id;
471
472 add_preset(sflist, zp);
473
474 return 0;
475 }
476
477
478 /* remove the present instrument layers */
479 static int
remove_info(struct snd_sf_list * sflist,struct snd_soundfont * sf,int bank,int instr)480 remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
481 int bank, int instr)
482 {
483 struct snd_sf_zone *prev, *next, *p;
484 int removed = 0;
485
486 prev = NULL;
487 for (p = sf->zones; p; p = next) {
488 next = p->next;
489 if (! p->mapped &&
490 p->bank == bank && p->instr == instr) {
491 /* remove this layer */
492 if (prev)
493 prev->next = next;
494 else
495 sf->zones = next;
496 removed++;
497 kfree(p);
498 } else
499 prev = p;
500 }
501 if (removed)
502 rebuild_presets(sflist);
503 return removed;
504 }
505
506
507 /*
508 * Read an info record from the user buffer and save it on the current
509 * open soundfont.
510 */
511 static int
load_info(struct snd_sf_list * sflist,const void __user * data,long count)512 load_info(struct snd_sf_list *sflist, const void __user *data, long count)
513 {
514 struct snd_soundfont *sf;
515 struct snd_sf_zone *zone;
516 struct soundfont_voice_rec_hdr hdr;
517 int i;
518
519 /* patch must be opened */
520 sf = sflist->currsf;
521 if (!sf)
522 return -EINVAL;
523
524 if (is_special_type(sf->type))
525 return -EINVAL;
526
527 if (count < (long)sizeof(hdr)) {
528 printk(KERN_ERR "Soundfont error: invalid patch zone length\n");
529 return -EINVAL;
530 }
531 if (copy_from_user((char*)&hdr, data, sizeof(hdr)))
532 return -EFAULT;
533
534 data += sizeof(hdr);
535 count -= sizeof(hdr);
536
537 if (hdr.nvoices <= 0 || hdr.nvoices >= 100) {
538 printk(KERN_ERR "Soundfont error: Illegal voice number %d\n",
539 hdr.nvoices);
540 return -EINVAL;
541 }
542
543 if (count < (long)sizeof(struct soundfont_voice_info) * hdr.nvoices) {
544 printk(KERN_ERR "Soundfont Error: "
545 "patch length(%ld) is smaller than nvoices(%d)\n",
546 count, hdr.nvoices);
547 return -EINVAL;
548 }
549
550 switch (hdr.write_mode) {
551 case SNDRV_SFNT_WR_EXCLUSIVE:
552 /* exclusive mode - if the instrument already exists,
553 return error */
554 for (zone = sf->zones; zone; zone = zone->next) {
555 if (!zone->mapped &&
556 zone->bank == hdr.bank &&
557 zone->instr == hdr.instr)
558 return -EINVAL;
559 }
560 break;
561 case SNDRV_SFNT_WR_REPLACE:
562 /* replace mode - remove the instrument if it already exists */
563 remove_info(sflist, sf, hdr.bank, hdr.instr);
564 break;
565 }
566
567 for (i = 0; i < hdr.nvoices; i++) {
568 struct snd_sf_zone tmpzone;
569
570 /* copy awe_voice_info parameters */
571 if (copy_from_user(&tmpzone.v, data, sizeof(tmpzone.v))) {
572 return -EFAULT;
573 }
574
575 data += sizeof(tmpzone.v);
576 count -= sizeof(tmpzone.v);
577
578 tmpzone.bank = hdr.bank;
579 tmpzone.instr = hdr.instr;
580 tmpzone.mapped = 0;
581 tmpzone.v.sf_id = sf->id;
582 if (tmpzone.v.mode & SNDRV_SFNT_MODE_INIT_PARM)
583 init_voice_parm(&tmpzone.v.parm);
584
585 /* create a new zone */
586 zone = sf_zone_new(sflist, sf);
587 if (!zone)
588 return -ENOMEM;
589
590 /* copy the temporary data */
591 zone->bank = tmpzone.bank;
592 zone->instr = tmpzone.instr;
593 zone->v = tmpzone.v;
594
595 /* look up the sample */
596 zone->sample = set_sample(sf, &zone->v);
597 }
598
599 return 0;
600 }
601
602
603 /* initialize voice_info record */
604 static void
init_voice_info(struct soundfont_voice_info * avp)605 init_voice_info(struct soundfont_voice_info *avp)
606 {
607 memset(avp, 0, sizeof(*avp));
608
609 avp->root = 60;
610 avp->high = 127;
611 avp->velhigh = 127;
612 avp->fixkey = -1;
613 avp->fixvel = -1;
614 avp->fixpan = -1;
615 avp->pan = -1;
616 avp->amplitude = 127;
617 avp->scaleTuning = 100;
618
619 init_voice_parm(&avp->parm);
620 }
621
622 /* initialize voice_parm record:
623 * Env1/2: delay=0, attack=0, hold=0, sustain=0, decay=0, release=0.
624 * Vibrato and Tremolo effects are zero.
625 * Cutoff is maximum.
626 * Chorus and Reverb effects are zero.
627 */
628 static void
init_voice_parm(struct soundfont_voice_parm * pp)629 init_voice_parm(struct soundfont_voice_parm *pp)
630 {
631 memset(pp, 0, sizeof(*pp));
632
633 pp->moddelay = 0x8000;
634 pp->modatkhld = 0x7f7f;
635 pp->moddcysus = 0x7f7f;
636 pp->modrelease = 0x807f;
637
638 pp->voldelay = 0x8000;
639 pp->volatkhld = 0x7f7f;
640 pp->voldcysus = 0x7f7f;
641 pp->volrelease = 0x807f;
642
643 pp->lfo1delay = 0x8000;
644 pp->lfo2delay = 0x8000;
645
646 pp->cutoff = 0xff;
647 }
648
649 /* search the specified sample */
650 static struct snd_sf_sample *
set_sample(struct snd_soundfont * sf,struct soundfont_voice_info * avp)651 set_sample(struct snd_soundfont *sf, struct soundfont_voice_info *avp)
652 {
653 struct snd_sf_sample *sample;
654
655 sample = find_sample(sf, avp->sample);
656 if (sample == NULL)
657 return NULL;
658
659 /* add in the actual sample offsets:
660 * The voice_info addresses define only the relative offset
661 * from sample pointers. Here we calculate the actual DRAM
662 * offset from sample pointers.
663 */
664 avp->start += sample->v.start;
665 avp->end += sample->v.end;
666 avp->loopstart += sample->v.loopstart;
667 avp->loopend += sample->v.loopend;
668
669 /* copy mode flags */
670 avp->sample_mode = sample->v.mode_flags;
671
672 return sample;
673 }
674
675 /* find the sample pointer with the given id in the soundfont */
676 static struct snd_sf_sample *
find_sample(struct snd_soundfont * sf,int sample_id)677 find_sample(struct snd_soundfont *sf, int sample_id)
678 {
679 struct snd_sf_sample *p;
680
681 if (sf == NULL)
682 return NULL;
683
684 for (p = sf->samples; p; p = p->next) {
685 if (p->v.sample == sample_id)
686 return p;
687 }
688 return NULL;
689 }
690
691
692 /*
693 * Load sample information, this can include data to be loaded onto
694 * the soundcard. It can also just be a pointer into soundcard ROM.
695 * If there is data it will be written to the soundcard via the callback
696 * routine.
697 */
698 static int
load_data(struct snd_sf_list * sflist,const void __user * data,long count)699 load_data(struct snd_sf_list *sflist, const void __user *data, long count)
700 {
701 struct snd_soundfont *sf;
702 struct soundfont_sample_info sample_info;
703 struct snd_sf_sample *sp;
704 long off;
705
706 /* patch must be opened */
707 sf = sflist->currsf;
708 if (!sf)
709 return -EINVAL;
710
711 if (is_special_type(sf->type))
712 return -EINVAL;
713
714 if (copy_from_user(&sample_info, data, sizeof(sample_info)))
715 return -EFAULT;
716
717 off = sizeof(sample_info);
718
719 if (sample_info.size != (count-off)/2)
720 return -EINVAL;
721
722 /* Check for dup */
723 if (find_sample(sf, sample_info.sample)) {
724 /* if shared sample, skip this data */
725 if (sf->type & SNDRV_SFNT_PAT_SHARED)
726 return 0;
727 return -EINVAL;
728 }
729
730 /* Allocate a new sample structure */
731 sp = sf_sample_new(sflist, sf);
732 if (!sp)
733 return -ENOMEM;
734
735 sp->v = sample_info;
736 sp->v.sf_id = sf->id;
737 sp->v.dummy = 0;
738 sp->v.truesize = sp->v.size;
739
740 /*
741 * If there is wave data then load it.
742 */
743 if (sp->v.size > 0) {
744 int rc;
745 rc = sflist->callback.sample_new
746 (sflist->callback.private_data, sp, sflist->memhdr,
747 data + off, count - off);
748 if (rc < 0) {
749 sf_sample_delete(sflist, sf, sp);
750 return rc;
751 }
752 sflist->mem_used += sp->v.truesize;
753 }
754
755 return count;
756 }
757
758
759 /* log2_tbl[i] = log2(i+128) * 0x10000 */
760 static const int log_tbl[129] = {
761 0x70000, 0x702df, 0x705b9, 0x7088e, 0x70b5d, 0x70e26, 0x710eb, 0x713aa,
762 0x71663, 0x71918, 0x71bc8, 0x71e72, 0x72118, 0x723b9, 0x72655, 0x728ed,
763 0x72b80, 0x72e0e, 0x73098, 0x7331d, 0x7359e, 0x7381b, 0x73a93, 0x73d08,
764 0x73f78, 0x741e4, 0x7444c, 0x746b0, 0x74910, 0x74b6c, 0x74dc4, 0x75019,
765 0x75269, 0x754b6, 0x75700, 0x75946, 0x75b88, 0x75dc7, 0x76002, 0x7623a,
766 0x7646e, 0x766a0, 0x768cd, 0x76af8, 0x76d1f, 0x76f43, 0x77164, 0x77382,
767 0x7759d, 0x777b4, 0x779c9, 0x77bdb, 0x77dea, 0x77ff5, 0x781fe, 0x78404,
768 0x78608, 0x78808, 0x78a06, 0x78c01, 0x78df9, 0x78fef, 0x791e2, 0x793d2,
769 0x795c0, 0x797ab, 0x79993, 0x79b79, 0x79d5d, 0x79f3e, 0x7a11d, 0x7a2f9,
770 0x7a4d3, 0x7a6ab, 0x7a880, 0x7aa53, 0x7ac24, 0x7adf2, 0x7afbe, 0x7b188,
771 0x7b350, 0x7b515, 0x7b6d8, 0x7b899, 0x7ba58, 0x7bc15, 0x7bdd0, 0x7bf89,
772 0x7c140, 0x7c2f5, 0x7c4a7, 0x7c658, 0x7c807, 0x7c9b3, 0x7cb5e, 0x7cd07,
773 0x7ceae, 0x7d053, 0x7d1f7, 0x7d398, 0x7d538, 0x7d6d6, 0x7d872, 0x7da0c,
774 0x7dba4, 0x7dd3b, 0x7ded0, 0x7e063, 0x7e1f4, 0x7e384, 0x7e512, 0x7e69f,
775 0x7e829, 0x7e9b3, 0x7eb3a, 0x7ecc0, 0x7ee44, 0x7efc7, 0x7f148, 0x7f2c8,
776 0x7f446, 0x7f5c2, 0x7f73d, 0x7f8b7, 0x7fa2f, 0x7fba5, 0x7fd1a, 0x7fe8d,
777 0x80000,
778 };
779
780 /* convert from linear to log value
781 *
782 * conversion: value = log2(amount / base) * ratio
783 *
784 * argument:
785 * amount = linear value (unsigned, 32bit max)
786 * offset = base offset (:= log2(base) * 0x10000)
787 * ratio = division ratio
788 *
789 */
790 int
snd_sf_linear_to_log(unsigned int amount,int offset,int ratio)791 snd_sf_linear_to_log(unsigned int amount, int offset, int ratio)
792 {
793 int v;
794 int s, low, bit;
795
796 if (amount < 2)
797 return 0;
798 for (bit = 0; ! (amount & 0x80000000L); bit++)
799 amount <<= 1;
800 s = (amount >> 24) & 0x7f;
801 low = (amount >> 16) & 0xff;
802 /* linear approximation by lower 8 bit */
803 v = (log_tbl[s + 1] * low + log_tbl[s] * (0x100 - low)) >> 8;
804 v -= offset;
805 v = (v * ratio) >> 16;
806 v += (24 - bit) * ratio;
807 return v;
808 }
809
810 EXPORT_SYMBOL(snd_sf_linear_to_log);
811
812
813 #define OFFSET_MSEC 653117 /* base = 1000 */
814 #define OFFSET_ABSCENT 851781 /* base = 8176 */
815 #define OFFSET_SAMPLERATE 1011119 /* base = 44100 */
816
817 #define ABSCENT_RATIO 1200
818 #define TIMECENT_RATIO 1200
819 #define SAMPLERATE_RATIO 4096
820
821 /*
822 * mHz to abscent
823 * conversion: abscent = log2(MHz / 8176) * 1200
824 */
825 static int
freq_to_note(int mhz)826 freq_to_note(int mhz)
827 {
828 return snd_sf_linear_to_log(mhz, OFFSET_ABSCENT, ABSCENT_RATIO);
829 }
830
831 /* convert Hz to AWE32 rate offset:
832 * sample pitch offset for the specified sample rate
833 * rate=44100 is no offset, each 4096 is 1 octave (twice).
834 * eg, when rate is 22050, this offset becomes -4096.
835 *
836 * conversion: offset = log2(Hz / 44100) * 4096
837 */
838 static int
calc_rate_offset(int hz)839 calc_rate_offset(int hz)
840 {
841 return snd_sf_linear_to_log(hz, OFFSET_SAMPLERATE, SAMPLERATE_RATIO);
842 }
843
844
845 /* calculate GUS envelope time */
846 static int
calc_gus_envelope_time(int rate,int start,int end)847 calc_gus_envelope_time(int rate, int start, int end)
848 {
849 int r, p, t;
850 r = (3 - ((rate >> 6) & 3)) * 3;
851 p = rate & 0x3f;
852 if (!p)
853 p = 1;
854 t = end - start;
855 if (t < 0) t = -t;
856 if (13 > r)
857 t = t << (13 - r);
858 else
859 t = t >> (r - 13);
860 return (t * 10) / (p * 441);
861 }
862
863 /* convert envelope time parameter to soundfont parameters */
864
865 /* attack & decay/release time table (msec) */
866 static const short attack_time_tbl[128] = {
867 32767, 32767, 5989, 4235, 2994, 2518, 2117, 1780, 1497, 1373, 1259, 1154, 1058, 970, 890, 816,
868 707, 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377,
869 361, 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188,
870 180, 172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94,
871 90, 86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47,
872 45, 43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23,
873 22, 21, 20, 19, 19, 18, 17, 16, 16, 15, 15, 14, 13, 13, 12, 12,
874 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 0,
875 };
876
877 static const short decay_time_tbl[128] = {
878 32767, 32767, 22614, 15990, 11307, 9508, 7995, 6723, 5653, 5184, 4754, 4359, 3997, 3665, 3361, 3082,
879 2828, 2765, 2648, 2535, 2428, 2325, 2226, 2132, 2042, 1955, 1872, 1793, 1717, 1644, 1574, 1507,
880 1443, 1382, 1324, 1267, 1214, 1162, 1113, 1066, 978, 936, 897, 859, 822, 787, 754, 722,
881 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377, 361,
882 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188, 180,
883 172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94, 90,
884 86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47, 45,
885 43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23, 22,
886 };
887
888 /* delay time = 0x8000 - msec/92 */
889 int
snd_sf_calc_parm_hold(int msec)890 snd_sf_calc_parm_hold(int msec)
891 {
892 int val = (0x7f * 92 - msec) / 92;
893 if (val < 1) val = 1;
894 if (val >= 126) val = 126;
895 return val;
896 }
897
898 /* search an index for specified time from given time table */
899 static int
calc_parm_search(int msec,const short * table)900 calc_parm_search(int msec, const short *table)
901 {
902 int left = 1, right = 127, mid;
903 while (left < right) {
904 mid = (left + right) / 2;
905 if (msec < (int)table[mid])
906 left = mid + 1;
907 else
908 right = mid;
909 }
910 return left;
911 }
912
913 /* attack time: search from time table */
914 int
snd_sf_calc_parm_attack(int msec)915 snd_sf_calc_parm_attack(int msec)
916 {
917 return calc_parm_search(msec, attack_time_tbl);
918 }
919
920 /* decay/release time: search from time table */
921 int
snd_sf_calc_parm_decay(int msec)922 snd_sf_calc_parm_decay(int msec)
923 {
924 return calc_parm_search(msec, decay_time_tbl);
925 }
926
927 int snd_sf_vol_table[128] = {
928 255,111,95,86,79,74,70,66,63,61,58,56,54,52,50,49,
929 47,46,45,43,42,41,40,39,38,37,36,35,34,34,33,32,
930 31,31,30,29,29,28,27,27,26,26,25,24,24,23,23,22,
931 22,21,21,21,20,20,19,19,18,18,18,17,17,16,16,16,
932 15,15,15,14,14,14,13,13,13,12,12,12,11,11,11,10,
933 10,10,10,9,9,9,8,8,8,8,7,7,7,7,6,6,
934 6,6,5,5,5,5,5,4,4,4,4,3,3,3,3,3,
935 2,2,2,2,2,1,1,1,1,1,0,0,0,0,0,0,
936 };
937
938
939 #define calc_gus_sustain(val) (0x7f - snd_sf_vol_table[(val)/2])
940 #define calc_gus_attenuation(val) snd_sf_vol_table[(val)/2]
941
942 /* load GUS patch */
943 static int
load_guspatch(struct snd_sf_list * sflist,const char __user * data,long count,int client)944 load_guspatch(struct snd_sf_list *sflist, const char __user *data,
945 long count, int client)
946 {
947 struct patch_info patch;
948 struct snd_soundfont *sf;
949 struct snd_sf_zone *zone;
950 struct snd_sf_sample *smp;
951 int note, sample_id;
952 int rc;
953
954 if (count < (long)sizeof(patch)) {
955 snd_printk(KERN_ERR "patch record too small %ld\n", count);
956 return -EINVAL;
957 }
958 if (copy_from_user(&patch, data, sizeof(patch)))
959 return -EFAULT;
960
961 count -= sizeof(patch);
962 data += sizeof(patch);
963
964 sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_GUS|SNDRV_SFNT_PAT_SHARED, NULL);
965 if (sf == NULL)
966 return -ENOMEM;
967 smp = sf_sample_new(sflist, sf);
968 if (!smp)
969 return -ENOMEM;
970 sample_id = sflist->sample_counter;
971 smp->v.sample = sample_id;
972 smp->v.start = 0;
973 smp->v.end = patch.len;
974 smp->v.loopstart = patch.loop_start;
975 smp->v.loopend = patch.loop_end;
976 smp->v.size = patch.len;
977
978 /* set up mode flags */
979 smp->v.mode_flags = 0;
980 if (!(patch.mode & WAVE_16_BITS))
981 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_8BITS;
982 if (patch.mode & WAVE_UNSIGNED)
983 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_UNSIGNED;
984 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_NO_BLANK;
985 if (!(patch.mode & (WAVE_LOOPING|WAVE_BIDIR_LOOP|WAVE_LOOP_BACK)))
986 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_SINGLESHOT;
987 if (patch.mode & WAVE_BIDIR_LOOP)
988 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_BIDIR_LOOP;
989 if (patch.mode & WAVE_LOOP_BACK)
990 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_REVERSE_LOOP;
991
992 if (patch.mode & WAVE_16_BITS) {
993 /* convert to word offsets */
994 smp->v.size /= 2;
995 smp->v.end /= 2;
996 smp->v.loopstart /= 2;
997 smp->v.loopend /= 2;
998 }
999 /*smp->v.loopend++;*/
1000
1001 smp->v.dummy = 0;
1002 smp->v.truesize = 0;
1003 smp->v.sf_id = sf->id;
1004
1005 /* set up voice info */
1006 zone = sf_zone_new(sflist, sf);
1007 if (!zone) {
1008 sf_sample_delete(sflist, sf, smp);
1009 return -ENOMEM;
1010 }
1011
1012 /*
1013 * load wave data
1014 */
1015 if (sflist->callback.sample_new) {
1016 rc = sflist->callback.sample_new
1017 (sflist->callback.private_data, smp, sflist->memhdr,
1018 data, count);
1019 if (rc < 0) {
1020 sf_sample_delete(sflist, sf, smp);
1021 kfree(zone);
1022 return rc;
1023 }
1024 /* memory offset is updated after */
1025 }
1026
1027 /* update the memory offset here */
1028 sflist->mem_used += smp->v.truesize;
1029
1030 zone->v.sample = sample_id; /* the last sample */
1031 zone->v.rate_offset = calc_rate_offset(patch.base_freq);
1032 note = freq_to_note(patch.base_note);
1033 zone->v.root = note / 100;
1034 zone->v.tune = -(note % 100);
1035 zone->v.low = (freq_to_note(patch.low_note) + 99) / 100;
1036 zone->v.high = freq_to_note(patch.high_note) / 100;
1037 /* panning position; -128 - 127 => 0-127 */
1038 zone->v.pan = (patch.panning + 128) / 2;
1039 #if 0
1040 snd_printk(KERN_DEBUG
1041 "gus: basefrq=%d (ofs=%d) root=%d,tune=%d, range:%d-%d\n",
1042 (int)patch.base_freq, zone->v.rate_offset,
1043 zone->v.root, zone->v.tune, zone->v.low, zone->v.high);
1044 #endif
1045
1046 /* detuning is ignored */
1047 /* 6points volume envelope */
1048 if (patch.mode & WAVE_ENVELOPES) {
1049 int attack, hold, decay, release;
1050 attack = calc_gus_envelope_time
1051 (patch.env_rate[0], 0, patch.env_offset[0]);
1052 hold = calc_gus_envelope_time
1053 (patch.env_rate[1], patch.env_offset[0],
1054 patch.env_offset[1]);
1055 decay = calc_gus_envelope_time
1056 (patch.env_rate[2], patch.env_offset[1],
1057 patch.env_offset[2]);
1058 release = calc_gus_envelope_time
1059 (patch.env_rate[3], patch.env_offset[1],
1060 patch.env_offset[4]);
1061 release += calc_gus_envelope_time
1062 (patch.env_rate[4], patch.env_offset[3],
1063 patch.env_offset[4]);
1064 release += calc_gus_envelope_time
1065 (patch.env_rate[5], patch.env_offset[4],
1066 patch.env_offset[5]);
1067 zone->v.parm.volatkhld =
1068 (snd_sf_calc_parm_hold(hold) << 8) |
1069 snd_sf_calc_parm_attack(attack);
1070 zone->v.parm.voldcysus = (calc_gus_sustain(patch.env_offset[2]) << 8) |
1071 snd_sf_calc_parm_decay(decay);
1072 zone->v.parm.volrelease = 0x8000 | snd_sf_calc_parm_decay(release);
1073 zone->v.attenuation = calc_gus_attenuation(patch.env_offset[0]);
1074 #if 0
1075 snd_printk(KERN_DEBUG
1076 "gus: atkhld=%x, dcysus=%x, volrel=%x, att=%d\n",
1077 zone->v.parm.volatkhld,
1078 zone->v.parm.voldcysus,
1079 zone->v.parm.volrelease,
1080 zone->v.attenuation);
1081 #endif
1082 }
1083
1084 /* fast release */
1085 if (patch.mode & WAVE_FAST_RELEASE) {
1086 zone->v.parm.volrelease = 0x807f;
1087 }
1088
1089 /* tremolo effect */
1090 if (patch.mode & WAVE_TREMOLO) {
1091 int rate = (patch.tremolo_rate * 1000 / 38) / 42;
1092 zone->v.parm.tremfrq = ((patch.tremolo_depth / 2) << 8) | rate;
1093 }
1094 /* vibrato effect */
1095 if (patch.mode & WAVE_VIBRATO) {
1096 int rate = (patch.vibrato_rate * 1000 / 38) / 42;
1097 zone->v.parm.fm2frq2 = ((patch.vibrato_depth / 6) << 8) | rate;
1098 }
1099
1100 /* scale_freq, scale_factor, volume, and fractions not implemented */
1101
1102 if (!(smp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT))
1103 zone->v.mode = SNDRV_SFNT_MODE_LOOPING;
1104 else
1105 zone->v.mode = 0;
1106
1107 /* append to the tail of the list */
1108 /*zone->bank = ctrls[AWE_MD_GUS_BANK];*/
1109 zone->bank = 0;
1110 zone->instr = patch.instr_no;
1111 zone->mapped = 0;
1112 zone->v.sf_id = sf->id;
1113
1114 zone->sample = set_sample(sf, &zone->v);
1115
1116 /* rebuild preset now */
1117 add_preset(sflist, zone);
1118
1119 return 0;
1120 }
1121
1122 /* load GUS patch */
1123 int
snd_soundfont_load_guspatch(struct snd_sf_list * sflist,const char __user * data,long count,int client)1124 snd_soundfont_load_guspatch(struct snd_sf_list *sflist, const char __user *data,
1125 long count, int client)
1126 {
1127 int rc;
1128 lock_preset(sflist);
1129 rc = load_guspatch(sflist, data, count, client);
1130 unlock_preset(sflist);
1131 return rc;
1132 }
1133
1134
1135 /*
1136 * Rebuild the preset table. This is like a hash table in that it allows
1137 * quick access to the zone information. For each preset there are zone
1138 * structures linked by next_instr and by next_zone. Former is the whole
1139 * link for this preset, and latter is the link for zone (i.e. instrument/
1140 * bank/key combination).
1141 */
1142 static void
rebuild_presets(struct snd_sf_list * sflist)1143 rebuild_presets(struct snd_sf_list *sflist)
1144 {
1145 struct snd_soundfont *sf;
1146 struct snd_sf_zone *cur;
1147
1148 /* clear preset table */
1149 memset(sflist->presets, 0, sizeof(sflist->presets));
1150
1151 /* search all fonts and insert each font */
1152 for (sf = sflist->fonts; sf; sf = sf->next) {
1153 for (cur = sf->zones; cur; cur = cur->next) {
1154 if (! cur->mapped && cur->sample == NULL) {
1155 /* try again to search the corresponding sample */
1156 cur->sample = set_sample(sf, &cur->v);
1157 if (cur->sample == NULL)
1158 continue;
1159 }
1160
1161 add_preset(sflist, cur);
1162 }
1163 }
1164 }
1165
1166
1167 /*
1168 * add the given zone to preset table
1169 */
1170 static void
add_preset(struct snd_sf_list * sflist,struct snd_sf_zone * cur)1171 add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur)
1172 {
1173 struct snd_sf_zone *zone;
1174 int index;
1175
1176 zone = search_first_zone(sflist, cur->bank, cur->instr, cur->v.low);
1177 if (zone && zone->v.sf_id != cur->v.sf_id) {
1178 /* different instrument was already defined */
1179 struct snd_sf_zone *p;
1180 /* compare the allocated time */
1181 for (p = zone; p; p = p->next_zone) {
1182 if (p->counter > cur->counter)
1183 /* the current is older.. skipped */
1184 return;
1185 }
1186 /* remove old zones */
1187 delete_preset(sflist, zone);
1188 zone = NULL; /* do not forget to clear this! */
1189 }
1190
1191 /* prepend this zone */
1192 index = get_index(cur->bank, cur->instr, cur->v.low);
1193 if (index < 0)
1194 return;
1195 cur->next_zone = zone; /* zone link */
1196 cur->next_instr = sflist->presets[index]; /* preset table link */
1197 sflist->presets[index] = cur;
1198 }
1199
1200 /*
1201 * delete the given zones from preset_table
1202 */
1203 static void
delete_preset(struct snd_sf_list * sflist,struct snd_sf_zone * zp)1204 delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp)
1205 {
1206 int index;
1207 struct snd_sf_zone *p;
1208
1209 index = get_index(zp->bank, zp->instr, zp->v.low);
1210 if (index < 0)
1211 return;
1212 for (p = sflist->presets[index]; p; p = p->next_instr) {
1213 while (p->next_instr == zp) {
1214 p->next_instr = zp->next_instr;
1215 zp = zp->next_zone;
1216 if (zp == NULL)
1217 return;
1218 }
1219 }
1220 }
1221
1222
1223 /*
1224 * Search matching zones from preset table.
1225 * The note can be rewritten by preset mapping (alias).
1226 * The found zones are stored on 'table' array. max_layers defines
1227 * the maximum number of elements in this array.
1228 * This function returns the number of found zones. 0 if not found.
1229 */
1230 int
snd_soundfont_search_zone(struct snd_sf_list * sflist,int * notep,int vel,int preset,int bank,int def_preset,int def_bank,struct snd_sf_zone ** table,int max_layers)1231 snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,
1232 int preset, int bank,
1233 int def_preset, int def_bank,
1234 struct snd_sf_zone **table, int max_layers)
1235 {
1236 int nvoices;
1237 unsigned long flags;
1238
1239 /* this function is supposed to be called atomically,
1240 * so we check the lock. if it's busy, just returns 0 to
1241 * tell the caller the busy state
1242 */
1243 spin_lock_irqsave(&sflist->lock, flags);
1244 if (sflist->presets_locked) {
1245 spin_unlock_irqrestore(&sflist->lock, flags);
1246 return 0;
1247 }
1248 nvoices = search_zones(sflist, notep, vel, preset, bank,
1249 table, max_layers, 0);
1250 if (! nvoices) {
1251 if (preset != def_preset || bank != def_bank)
1252 nvoices = search_zones(sflist, notep, vel,
1253 def_preset, def_bank,
1254 table, max_layers, 0);
1255 }
1256 spin_unlock_irqrestore(&sflist->lock, flags);
1257 return nvoices;
1258 }
1259
1260
1261 /*
1262 * search the first matching zone
1263 */
1264 static struct snd_sf_zone *
search_first_zone(struct snd_sf_list * sflist,int bank,int preset,int key)1265 search_first_zone(struct snd_sf_list *sflist, int bank, int preset, int key)
1266 {
1267 int index;
1268 struct snd_sf_zone *zp;
1269
1270 index = get_index(bank, preset, key);
1271 if (index < 0)
1272 return NULL;
1273 for (zp = sflist->presets[index]; zp; zp = zp->next_instr) {
1274 if (zp->instr == preset && zp->bank == bank)
1275 return zp;
1276 }
1277 return NULL;
1278 }
1279
1280
1281 /*
1282 * search matching zones from sflist. can be called recursively.
1283 */
1284 static int
search_zones(struct snd_sf_list * sflist,int * notep,int vel,int preset,int bank,struct snd_sf_zone ** table,int max_layers,int level)1285 search_zones(struct snd_sf_list *sflist, int *notep, int vel,
1286 int preset, int bank, struct snd_sf_zone **table,
1287 int max_layers, int level)
1288 {
1289 struct snd_sf_zone *zp;
1290 int nvoices;
1291
1292 zp = search_first_zone(sflist, bank, preset, *notep);
1293 nvoices = 0;
1294 for (; zp; zp = zp->next_zone) {
1295 if (*notep >= zp->v.low && *notep <= zp->v.high &&
1296 vel >= zp->v.vellow && vel <= zp->v.velhigh) {
1297 if (zp->mapped) {
1298 /* search preset mapping (aliasing) */
1299 int key = zp->v.fixkey;
1300 preset = zp->v.start;
1301 bank = zp->v.end;
1302
1303 if (level > 5) /* too deep alias level */
1304 return 0;
1305 if (key < 0)
1306 key = *notep;
1307 nvoices = search_zones(sflist, &key, vel,
1308 preset, bank, table,
1309 max_layers, level + 1);
1310 if (nvoices > 0)
1311 *notep = key;
1312 break;
1313 }
1314 table[nvoices++] = zp;
1315 if (nvoices >= max_layers)
1316 break;
1317 }
1318 }
1319
1320 return nvoices;
1321 }
1322
1323
1324 /* calculate the index of preset table:
1325 * drums are mapped from 128 to 255 according to its note key.
1326 * other instruments are mapped from 0 to 127.
1327 * if the index is out of range, return -1.
1328 */
1329 static int
get_index(int bank,int instr,int key)1330 get_index(int bank, int instr, int key)
1331 {
1332 int index;
1333 if (SF_IS_DRUM_BANK(bank))
1334 index = key + SF_MAX_INSTRUMENTS;
1335 else
1336 index = instr;
1337 index = index % SF_MAX_PRESETS;
1338 if (index < 0)
1339 return -1;
1340 return index;
1341 }
1342
1343 /*
1344 * Initialise the sflist structure.
1345 */
1346 static void
snd_sf_init(struct snd_sf_list * sflist)1347 snd_sf_init(struct snd_sf_list *sflist)
1348 {
1349 memset(sflist->presets, 0, sizeof(sflist->presets));
1350
1351 sflist->mem_used = 0;
1352 sflist->currsf = NULL;
1353 sflist->open_client = -1;
1354 sflist->fonts = NULL;
1355 sflist->fonts_size = 0;
1356 sflist->zone_counter = 0;
1357 sflist->sample_counter = 0;
1358 sflist->zone_locked = 0;
1359 sflist->sample_locked = 0;
1360 }
1361
1362 /*
1363 * Release all list records
1364 */
1365 static void
snd_sf_clear(struct snd_sf_list * sflist)1366 snd_sf_clear(struct snd_sf_list *sflist)
1367 {
1368 struct snd_soundfont *sf, *nextsf;
1369 struct snd_sf_zone *zp, *nextzp;
1370 struct snd_sf_sample *sp, *nextsp;
1371
1372 for (sf = sflist->fonts; sf; sf = nextsf) {
1373 nextsf = sf->next;
1374 for (zp = sf->zones; zp; zp = nextzp) {
1375 nextzp = zp->next;
1376 kfree(zp);
1377 }
1378 for (sp = sf->samples; sp; sp = nextsp) {
1379 nextsp = sp->next;
1380 if (sflist->callback.sample_free)
1381 sflist->callback.sample_free(sflist->callback.private_data,
1382 sp, sflist->memhdr);
1383 kfree(sp);
1384 }
1385 kfree(sf);
1386 }
1387
1388 snd_sf_init(sflist);
1389 }
1390
1391
1392 /*
1393 * Create a new sflist structure
1394 */
1395 struct snd_sf_list *
snd_sf_new(struct snd_sf_callback * callback,struct snd_util_memhdr * hdr)1396 snd_sf_new(struct snd_sf_callback *callback, struct snd_util_memhdr *hdr)
1397 {
1398 struct snd_sf_list *sflist;
1399
1400 sflist = kzalloc(sizeof(*sflist), GFP_KERNEL);
1401 if (!sflist)
1402 return NULL;
1403
1404 mutex_init(&sflist->presets_mutex);
1405 spin_lock_init(&sflist->lock);
1406 sflist->memhdr = hdr;
1407
1408 if (callback)
1409 sflist->callback = *callback;
1410
1411 snd_sf_init(sflist);
1412 return sflist;
1413 }
1414
1415
1416 /*
1417 * Free everything allocated off the sflist structure.
1418 */
1419 void
snd_sf_free(struct snd_sf_list * sflist)1420 snd_sf_free(struct snd_sf_list *sflist)
1421 {
1422 if (sflist == NULL)
1423 return;
1424
1425 lock_preset(sflist);
1426 if (sflist->callback.sample_reset)
1427 sflist->callback.sample_reset(sflist->callback.private_data);
1428 snd_sf_clear(sflist);
1429 unlock_preset(sflist);
1430
1431 kfree(sflist);
1432 }
1433
1434 /*
1435 * Remove all samples
1436 * The soundcard should be silent before calling this function.
1437 */
1438 int
snd_soundfont_remove_samples(struct snd_sf_list * sflist)1439 snd_soundfont_remove_samples(struct snd_sf_list *sflist)
1440 {
1441 lock_preset(sflist);
1442 if (sflist->callback.sample_reset)
1443 sflist->callback.sample_reset(sflist->callback.private_data);
1444 snd_sf_clear(sflist);
1445 unlock_preset(sflist);
1446
1447 return 0;
1448 }
1449
1450 /*
1451 * Remove unlocked samples.
1452 * The soundcard should be silent before calling this function.
1453 */
1454 int
snd_soundfont_remove_unlocked(struct snd_sf_list * sflist)1455 snd_soundfont_remove_unlocked(struct snd_sf_list *sflist)
1456 {
1457 struct snd_soundfont *sf;
1458 struct snd_sf_zone *zp, *nextzp;
1459 struct snd_sf_sample *sp, *nextsp;
1460
1461 lock_preset(sflist);
1462
1463 if (sflist->callback.sample_reset)
1464 sflist->callback.sample_reset(sflist->callback.private_data);
1465
1466 /* to be sure */
1467 memset(sflist->presets, 0, sizeof(sflist->presets));
1468
1469 for (sf = sflist->fonts; sf; sf = sf->next) {
1470 for (zp = sf->zones; zp; zp = nextzp) {
1471 if (zp->counter < sflist->zone_locked)
1472 break;
1473 nextzp = zp->next;
1474 sf->zones = nextzp;
1475 kfree(zp);
1476 }
1477
1478 for (sp = sf->samples; sp; sp = nextsp) {
1479 if (sp->counter < sflist->sample_locked)
1480 break;
1481 nextsp = sp->next;
1482 sf->samples = nextsp;
1483 sflist->mem_used -= sp->v.truesize;
1484 if (sflist->callback.sample_free)
1485 sflist->callback.sample_free(sflist->callback.private_data,
1486 sp, sflist->memhdr);
1487 kfree(sp);
1488 }
1489 }
1490
1491 sflist->zone_counter = sflist->zone_locked;
1492 sflist->sample_counter = sflist->sample_locked;
1493
1494 rebuild_presets(sflist);
1495
1496 unlock_preset(sflist);
1497 return 0;
1498 }
1499