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_card *card, struct snd_sf_list *sflist,
42 const void __user *data, long count);
43 static int remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
44 int bank, int instr);
45 static void init_voice_info(struct soundfont_voice_info *avp);
46 static void init_voice_parm(struct soundfont_voice_parm *pp);
47 static struct snd_sf_sample *set_sample(struct snd_soundfont *sf,
48 struct soundfont_voice_info *avp);
49 static struct snd_sf_sample *find_sample(struct snd_soundfont *sf, int sample_id);
50 static int load_data(struct snd_sf_list *sflist, const void __user *data, long count);
51 static void rebuild_presets(struct snd_sf_list *sflist);
52 static void add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur);
53 static void delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp);
54 static struct snd_sf_zone *search_first_zone(struct snd_sf_list *sflist,
55 int bank, int preset, int key);
56 static int search_zones(struct snd_sf_list *sflist, int *notep, int vel,
57 int preset, int bank, struct snd_sf_zone **table,
58 int max_layers, int level);
59 static int get_index(int bank, int instr, int key);
60 static void snd_sf_init(struct snd_sf_list *sflist);
61 static void snd_sf_clear(struct snd_sf_list *sflist);
62
63 /*
64 * lock access to sflist
65 */
66 static void
lock_preset(struct snd_sf_list * sflist)67 lock_preset(struct snd_sf_list *sflist)
68 {
69 unsigned long flags;
70 mutex_lock(&sflist->presets_mutex);
71 spin_lock_irqsave(&sflist->lock, flags);
72 sflist->presets_locked = 1;
73 spin_unlock_irqrestore(&sflist->lock, flags);
74 }
75
76
77 /*
78 * remove lock
79 */
80 static void
unlock_preset(struct snd_sf_list * sflist)81 unlock_preset(struct snd_sf_list *sflist)
82 {
83 unsigned long flags;
84 spin_lock_irqsave(&sflist->lock, flags);
85 sflist->presets_locked = 0;
86 spin_unlock_irqrestore(&sflist->lock, flags);
87 mutex_unlock(&sflist->presets_mutex);
88 }
89
90
91 /*
92 * close the patch if the patch was opened by this client.
93 */
94 int
snd_soundfont_close_check(struct snd_sf_list * sflist,int client)95 snd_soundfont_close_check(struct snd_sf_list *sflist, int client)
96 {
97 unsigned long flags;
98 spin_lock_irqsave(&sflist->lock, flags);
99 if (sflist->open_client == client) {
100 spin_unlock_irqrestore(&sflist->lock, flags);
101 return close_patch(sflist);
102 }
103 spin_unlock_irqrestore(&sflist->lock, flags);
104 return 0;
105 }
106
107
108 /*
109 * Deal with a soundfont patch. Any driver could use these routines
110 * although it was designed for the AWE64.
111 *
112 * The sample_write and callargs parameters allow a callback into
113 * the actual driver to write sample data to the board or whatever
114 * it wants to do with it.
115 */
116 int
snd_soundfont_load(struct snd_card * card,struct snd_sf_list * sflist,const void __user * data,long count,int client)117 snd_soundfont_load(struct snd_card *card,
118 struct snd_sf_list *sflist, const void __user *data,
119 long count, int client)
120 {
121 struct soundfont_patch_info patch;
122 unsigned long flags;
123 int rc;
124
125 if (count < (long)sizeof(patch)) {
126 dev_err(card->dev, "patch record too small %ld\n", count);
127 return -EINVAL;
128 }
129 if (copy_from_user(&patch, data, sizeof(patch)))
130 return -EFAULT;
131
132 count -= sizeof(patch);
133 data += sizeof(patch);
134
135 if (patch.key != SNDRV_OSS_SOUNDFONT_PATCH) {
136 dev_err(card->dev, "The wrong kind of patch %x\n", patch.key);
137 return -EINVAL;
138 }
139 if (count < patch.len) {
140 dev_err(card->dev, "Patch too short %ld, need %d\n",
141 count, patch.len);
142 return -EINVAL;
143 }
144 if (patch.len < 0) {
145 dev_err(card->dev, "poor length %d\n", patch.len);
146 return -EINVAL;
147 }
148
149 if (patch.type == SNDRV_SFNT_OPEN_PATCH) {
150 /* grab sflist to open */
151 lock_preset(sflist);
152 rc = open_patch(sflist, data, count, client);
153 unlock_preset(sflist);
154 return rc;
155 }
156
157 /* check if other client already opened patch */
158 spin_lock_irqsave(&sflist->lock, flags);
159 if (sflist->open_client != client) {
160 spin_unlock_irqrestore(&sflist->lock, flags);
161 return -EBUSY;
162 }
163 spin_unlock_irqrestore(&sflist->lock, flags);
164
165 lock_preset(sflist);
166 rc = -EINVAL;
167 switch (patch.type) {
168 case SNDRV_SFNT_LOAD_INFO:
169 rc = load_info(card, sflist, data, count);
170 break;
171 case SNDRV_SFNT_LOAD_DATA:
172 rc = load_data(sflist, data, count);
173 break;
174 case SNDRV_SFNT_CLOSE_PATCH:
175 rc = close_patch(sflist);
176 break;
177 case SNDRV_SFNT_REPLACE_DATA:
178 /*rc = replace_data(&patch, data, count);*/
179 break;
180 case SNDRV_SFNT_MAP_PRESET:
181 rc = load_map(sflist, data, count);
182 break;
183 case SNDRV_SFNT_PROBE_DATA:
184 rc = probe_data(sflist, patch.optarg);
185 break;
186 case SNDRV_SFNT_REMOVE_INFO:
187 /* patch must be opened */
188 if (!sflist->currsf) {
189 dev_err(card->dev,
190 "soundfont: remove_info: patch not opened\n");
191 rc = -EINVAL;
192 } else {
193 int bank, instr;
194 bank = ((unsigned short)patch.optarg >> 8) & 0xff;
195 instr = (unsigned short)patch.optarg & 0xff;
196 if (! remove_info(sflist, sflist->currsf, bank, instr))
197 rc = -EINVAL;
198 else
199 rc = 0;
200 }
201 break;
202 }
203 unlock_preset(sflist);
204
205 return rc;
206 }
207
208
209 /* check if specified type is special font (GUS or preset-alias) */
210 static inline int
is_special_type(int type)211 is_special_type(int type)
212 {
213 type &= 0x0f;
214 return (type == SNDRV_SFNT_PAT_TYPE_GUS ||
215 type == SNDRV_SFNT_PAT_TYPE_MAP);
216 }
217
218
219 /* open patch; create sf list */
220 static int
open_patch(struct snd_sf_list * sflist,const char __user * data,int count,int client)221 open_patch(struct snd_sf_list *sflist, const char __user *data,
222 int count, int client)
223 {
224 struct soundfont_open_parm parm;
225 struct snd_soundfont *sf;
226 unsigned long flags;
227
228 spin_lock_irqsave(&sflist->lock, flags);
229 if (sflist->open_client >= 0 || sflist->currsf) {
230 spin_unlock_irqrestore(&sflist->lock, flags);
231 return -EBUSY;
232 }
233 spin_unlock_irqrestore(&sflist->lock, flags);
234
235 if (copy_from_user(&parm, data, sizeof(parm)))
236 return -EFAULT;
237
238 if (is_special_type(parm.type)) {
239 parm.type |= SNDRV_SFNT_PAT_SHARED;
240 sf = newsf(sflist, parm.type, NULL);
241 } else
242 sf = newsf(sflist, parm.type, parm.name);
243 if (sf == NULL) {
244 return -ENOMEM;
245 }
246
247 spin_lock_irqsave(&sflist->lock, flags);
248 sflist->open_client = client;
249 sflist->currsf = sf;
250 spin_unlock_irqrestore(&sflist->lock, flags);
251
252 return 0;
253 }
254
255 /*
256 * Allocate a new soundfont structure.
257 */
258 static struct snd_soundfont *
newsf(struct snd_sf_list * sflist,int type,char * name)259 newsf(struct snd_sf_list *sflist, int type, char *name)
260 {
261 struct snd_soundfont *sf;
262
263 /* check the shared fonts */
264 if (type & SNDRV_SFNT_PAT_SHARED) {
265 for (sf = sflist->fonts; sf; sf = sf->next) {
266 if (is_identical_font(sf, type, name)) {
267 return sf;
268 }
269 }
270 }
271
272 /* not found -- create a new one */
273 sf = kzalloc(sizeof(*sf), GFP_KERNEL);
274 if (sf == NULL)
275 return NULL;
276 sf->id = sflist->fonts_size;
277 sflist->fonts_size++;
278
279 /* prepend this record */
280 sf->next = sflist->fonts;
281 sflist->fonts = sf;
282
283 sf->type = type;
284 sf->zones = NULL;
285 sf->samples = NULL;
286 if (name)
287 memcpy(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN);
288
289 return sf;
290 }
291
292 /* check if the given name matches to the existing list */
293 static int
is_identical_font(struct snd_soundfont * sf,int type,unsigned char * name)294 is_identical_font(struct snd_soundfont *sf, int type, unsigned char *name)
295 {
296 return ((sf->type & SNDRV_SFNT_PAT_SHARED) &&
297 (sf->type & 0x0f) == (type & 0x0f) &&
298 (name == NULL ||
299 memcmp(sf->name, name, SNDRV_SFNT_PATCH_NAME_LEN) == 0));
300 }
301
302 /*
303 * Close the current patch.
304 */
305 static int
close_patch(struct snd_sf_list * sflist)306 close_patch(struct snd_sf_list *sflist)
307 {
308 unsigned long flags;
309
310 spin_lock_irqsave(&sflist->lock, flags);
311 sflist->currsf = NULL;
312 sflist->open_client = -1;
313 spin_unlock_irqrestore(&sflist->lock, flags);
314
315 rebuild_presets(sflist);
316
317 return 0;
318
319 }
320
321 /* probe sample in the current list -- nothing to be loaded */
322 static int
probe_data(struct snd_sf_list * sflist,int sample_id)323 probe_data(struct snd_sf_list *sflist, int sample_id)
324 {
325 /* patch must be opened */
326 if (sflist->currsf) {
327 /* search the specified sample by optarg */
328 if (find_sample(sflist->currsf, sample_id))
329 return 0;
330 }
331 return -EINVAL;
332 }
333
334 /*
335 * increment zone counter
336 */
337 static void
set_zone_counter(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_zone * zp)338 set_zone_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
339 struct snd_sf_zone *zp)
340 {
341 zp->counter = sflist->zone_counter++;
342 if (sf->type & SNDRV_SFNT_PAT_LOCKED)
343 sflist->zone_locked = sflist->zone_counter;
344 }
345
346 /*
347 * allocate a new zone record
348 */
349 static struct snd_sf_zone *
sf_zone_new(struct snd_sf_list * sflist,struct snd_soundfont * sf)350 sf_zone_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
351 {
352 struct snd_sf_zone *zp;
353
354 zp = kzalloc(sizeof(*zp), GFP_KERNEL);
355 if (!zp)
356 return NULL;
357 zp->next = sf->zones;
358 sf->zones = zp;
359
360 init_voice_info(&zp->v);
361
362 set_zone_counter(sflist, sf, zp);
363 return zp;
364 }
365
366
367 /*
368 * increment sample counter
369 */
370 static void
set_sample_counter(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_sample * sp)371 set_sample_counter(struct snd_sf_list *sflist, struct snd_soundfont *sf,
372 struct snd_sf_sample *sp)
373 {
374 sp->counter = sflist->sample_counter++;
375 if (sf->type & SNDRV_SFNT_PAT_LOCKED)
376 sflist->sample_locked = sflist->sample_counter;
377 }
378
379 /*
380 * allocate a new sample list record
381 */
382 static struct snd_sf_sample *
sf_sample_new(struct snd_sf_list * sflist,struct snd_soundfont * sf)383 sf_sample_new(struct snd_sf_list *sflist, struct snd_soundfont *sf)
384 {
385 struct snd_sf_sample *sp;
386
387 sp = kzalloc(sizeof(*sp), GFP_KERNEL);
388 if (!sp)
389 return NULL;
390
391 sp->next = sf->samples;
392 sf->samples = sp;
393
394 set_sample_counter(sflist, sf, sp);
395 return sp;
396 }
397
398 /*
399 * delete sample list -- this is an exceptional job.
400 * only the last allocated sample can be deleted.
401 */
402 static void
sf_sample_delete(struct snd_sf_list * sflist,struct snd_soundfont * sf,struct snd_sf_sample * sp)403 sf_sample_delete(struct snd_sf_list *sflist, struct snd_soundfont *sf,
404 struct snd_sf_sample *sp)
405 {
406 /* only last sample is accepted */
407 if (sp == sf->samples) {
408 sf->samples = sp->next;
409 kfree(sp);
410 }
411 }
412
413
414 /* load voice map */
415 static int
load_map(struct snd_sf_list * sflist,const void __user * data,int count)416 load_map(struct snd_sf_list *sflist, const void __user *data, int count)
417 {
418 struct snd_sf_zone *zp, *prevp;
419 struct snd_soundfont *sf;
420 struct soundfont_voice_map map;
421
422 /* get the link info */
423 if (count < (int)sizeof(map))
424 return -EINVAL;
425 if (copy_from_user(&map, data, sizeof(map)))
426 return -EFAULT;
427
428 if (map.map_instr < 0 || map.map_instr >= SF_MAX_INSTRUMENTS)
429 return -EINVAL;
430
431 sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_MAP|SNDRV_SFNT_PAT_SHARED, NULL);
432 if (sf == NULL)
433 return -ENOMEM;
434
435 prevp = NULL;
436 for (zp = sf->zones; zp; prevp = zp, zp = zp->next) {
437 if (zp->mapped &&
438 zp->instr == map.map_instr &&
439 zp->bank == map.map_bank &&
440 zp->v.low == map.map_key &&
441 zp->v.start == map.src_instr &&
442 zp->v.end == map.src_bank &&
443 zp->v.fixkey == map.src_key) {
444 /* the same mapping is already present */
445 /* relink this record to the link head */
446 if (prevp) {
447 prevp->next = zp->next;
448 zp->next = sf->zones;
449 sf->zones = zp;
450 }
451 /* update the counter */
452 set_zone_counter(sflist, sf, zp);
453 return 0;
454 }
455 }
456
457 /* create a new zone */
458 zp = sf_zone_new(sflist, sf);
459 if (!zp)
460 return -ENOMEM;
461
462 zp->bank = map.map_bank;
463 zp->instr = map.map_instr;
464 zp->mapped = 1;
465 if (map.map_key >= 0) {
466 zp->v.low = map.map_key;
467 zp->v.high = map.map_key;
468 }
469 zp->v.start = map.src_instr;
470 zp->v.end = map.src_bank;
471 zp->v.fixkey = map.src_key;
472 zp->v.sf_id = sf->id;
473
474 add_preset(sflist, zp);
475
476 return 0;
477 }
478
479
480 /* remove the present instrument layers */
481 static int
remove_info(struct snd_sf_list * sflist,struct snd_soundfont * sf,int bank,int instr)482 remove_info(struct snd_sf_list *sflist, struct snd_soundfont *sf,
483 int bank, int instr)
484 {
485 struct snd_sf_zone *prev, *next, *p;
486 int removed = 0;
487
488 prev = NULL;
489 for (p = sf->zones; p; p = next) {
490 next = p->next;
491 if (! p->mapped &&
492 p->bank == bank && p->instr == instr) {
493 /* remove this layer */
494 if (prev)
495 prev->next = next;
496 else
497 sf->zones = next;
498 removed++;
499 kfree(p);
500 } else
501 prev = p;
502 }
503 if (removed)
504 rebuild_presets(sflist);
505 return removed;
506 }
507
508
509 /*
510 * Read an info record from the user buffer and save it on the current
511 * open soundfont.
512 */
513 static int
load_info(struct snd_card * card,struct snd_sf_list * sflist,const void __user * data,long count)514 load_info(struct snd_card *card,
515 struct snd_sf_list *sflist, const void __user *data, long count)
516 {
517 struct snd_soundfont *sf;
518 struct snd_sf_zone *zone;
519 struct soundfont_voice_rec_hdr hdr;
520 int i;
521
522 /* patch must be opened */
523 sf = sflist->currsf;
524 if (!sf)
525 return -EINVAL;
526
527 if (is_special_type(sf->type))
528 return -EINVAL;
529
530 if (count < (long)sizeof(hdr)) {
531 dev_err(card->dev, "Soundfont error: invalid patch zone length\n");
532 return -EINVAL;
533 }
534 if (copy_from_user((char*)&hdr, data, sizeof(hdr)))
535 return -EFAULT;
536
537 data += sizeof(hdr);
538 count -= sizeof(hdr);
539
540 if (hdr.nvoices <= 0 || hdr.nvoices >= 100) {
541 dev_err(card->dev, "Soundfont error: Illegal voice number %d\n",
542 hdr.nvoices);
543 return -EINVAL;
544 }
545
546 if (count < (long)sizeof(struct soundfont_voice_info) * hdr.nvoices) {
547 dev_err(card->dev,
548 "Soundfont Error: patch length(%ld) is smaller than nvoices(%d)\n",
549 count, hdr.nvoices);
550 return -EINVAL;
551 }
552
553 switch (hdr.write_mode) {
554 case SNDRV_SFNT_WR_EXCLUSIVE:
555 /* exclusive mode - if the instrument already exists,
556 return error */
557 for (zone = sf->zones; zone; zone = zone->next) {
558 if (!zone->mapped &&
559 zone->bank == hdr.bank &&
560 zone->instr == hdr.instr)
561 return -EINVAL;
562 }
563 break;
564 case SNDRV_SFNT_WR_REPLACE:
565 /* replace mode - remove the instrument if it already exists */
566 remove_info(sflist, sf, hdr.bank, hdr.instr);
567 break;
568 }
569
570 for (i = 0; i < hdr.nvoices; i++) {
571 struct snd_sf_zone tmpzone;
572
573 /* copy awe_voice_info parameters */
574 if (copy_from_user(&tmpzone.v, data, sizeof(tmpzone.v))) {
575 return -EFAULT;
576 }
577
578 data += sizeof(tmpzone.v);
579 count -= sizeof(tmpzone.v);
580
581 tmpzone.bank = hdr.bank;
582 tmpzone.instr = hdr.instr;
583 tmpzone.mapped = 0;
584 tmpzone.v.sf_id = sf->id;
585 if (tmpzone.v.mode & SNDRV_SFNT_MODE_INIT_PARM)
586 init_voice_parm(&tmpzone.v.parm);
587
588 /* create a new zone */
589 zone = sf_zone_new(sflist, sf);
590 if (!zone)
591 return -ENOMEM;
592
593 /* copy the temporary data */
594 zone->bank = tmpzone.bank;
595 zone->instr = tmpzone.instr;
596 zone->v = tmpzone.v;
597
598 /* look up the sample */
599 zone->sample = set_sample(sf, &zone->v);
600 }
601
602 return 0;
603 }
604
605
606 /* initialize voice_info record */
607 static void
init_voice_info(struct soundfont_voice_info * avp)608 init_voice_info(struct soundfont_voice_info *avp)
609 {
610 memset(avp, 0, sizeof(*avp));
611
612 avp->root = 60;
613 avp->high = 127;
614 avp->velhigh = 127;
615 avp->fixkey = -1;
616 avp->fixvel = -1;
617 avp->fixpan = -1;
618 avp->pan = -1;
619 avp->amplitude = 127;
620 avp->scaleTuning = 100;
621
622 init_voice_parm(&avp->parm);
623 }
624
625 /* initialize voice_parm record:
626 * Env1/2: delay=0, attack=0, hold=0, sustain=0, decay=0, release=0.
627 * Vibrato and Tremolo effects are zero.
628 * Cutoff is maximum.
629 * Chorus and Reverb effects are zero.
630 */
631 static void
init_voice_parm(struct soundfont_voice_parm * pp)632 init_voice_parm(struct soundfont_voice_parm *pp)
633 {
634 memset(pp, 0, sizeof(*pp));
635
636 pp->moddelay = 0x8000;
637 pp->modatkhld = 0x7f7f;
638 pp->moddcysus = 0x7f7f;
639 pp->modrelease = 0x807f;
640
641 pp->voldelay = 0x8000;
642 pp->volatkhld = 0x7f7f;
643 pp->voldcysus = 0x7f7f;
644 pp->volrelease = 0x807f;
645
646 pp->lfo1delay = 0x8000;
647 pp->lfo2delay = 0x8000;
648
649 pp->cutoff = 0xff;
650 }
651
652 /* search the specified sample */
653 static struct snd_sf_sample *
set_sample(struct snd_soundfont * sf,struct soundfont_voice_info * avp)654 set_sample(struct snd_soundfont *sf, struct soundfont_voice_info *avp)
655 {
656 struct snd_sf_sample *sample;
657
658 sample = find_sample(sf, avp->sample);
659 if (sample == NULL)
660 return NULL;
661
662 /* add in the actual sample offsets:
663 * The voice_info addresses define only the relative offset
664 * from sample pointers. Here we calculate the actual DRAM
665 * offset from sample pointers.
666 */
667 avp->start += sample->v.start;
668 avp->end += sample->v.end;
669 avp->loopstart += sample->v.loopstart;
670 avp->loopend += sample->v.loopend;
671
672 /* copy mode flags */
673 avp->sample_mode = sample->v.mode_flags;
674
675 return sample;
676 }
677
678 /* find the sample pointer with the given id in the soundfont */
679 static struct snd_sf_sample *
find_sample(struct snd_soundfont * sf,int sample_id)680 find_sample(struct snd_soundfont *sf, int sample_id)
681 {
682 struct snd_sf_sample *p;
683
684 if (sf == NULL)
685 return NULL;
686
687 for (p = sf->samples; p; p = p->next) {
688 if (p->v.sample == sample_id)
689 return p;
690 }
691 return NULL;
692 }
693
694
695 static int
validate_sample_info(struct soundfont_sample_info * si)696 validate_sample_info(struct soundfont_sample_info *si)
697 {
698 if (si->end < 0 || si->end > si->size)
699 return -EINVAL;
700 if (si->loopstart < 0 || si->loopstart > si->end)
701 return -EINVAL;
702 if (si->loopend < 0 || si->loopend > si->end)
703 return -EINVAL;
704 /* be sure loop points start < end */
705 if (si->loopstart > si->loopend)
706 swap(si->loopstart, si->loopend);
707 return 0;
708 }
709
710 /*
711 * Load sample information, this can include data to be loaded onto
712 * the soundcard. It can also just be a pointer into soundcard ROM.
713 * If there is data it will be written to the soundcard via the callback
714 * routine.
715 */
716 static int
load_data(struct snd_sf_list * sflist,const void __user * data,long count)717 load_data(struct snd_sf_list *sflist, const void __user *data, long count)
718 {
719 struct snd_soundfont *sf;
720 struct soundfont_sample_info sample_info;
721 struct snd_sf_sample *sp;
722
723 /* patch must be opened */
724 sf = sflist->currsf;
725 if (!sf)
726 return -EINVAL;
727
728 if (is_special_type(sf->type))
729 return -EINVAL;
730
731 if (count < (long)sizeof(sample_info)) {
732 return -EINVAL;
733 }
734 if (copy_from_user(&sample_info, data, sizeof(sample_info)))
735 return -EFAULT;
736 data += sizeof(sample_info);
737 count -= sizeof(sample_info);
738
739 // SoundFont uses S16LE samples.
740 if (sample_info.size * 2 != count)
741 return -EINVAL;
742
743 /* Check for dup */
744 if (find_sample(sf, sample_info.sample)) {
745 /* if shared sample, skip this data */
746 if (sf->type & SNDRV_SFNT_PAT_SHARED)
747 return 0;
748 return -EINVAL;
749 }
750
751 if (sample_info.size > 0) {
752 if (sample_info.start < 0)
753 return -EINVAL;
754
755 // Here we "rebase out" the start address, because the
756 // real start is the start of the provided sample data.
757 sample_info.end -= sample_info.start;
758 sample_info.loopstart -= sample_info.start;
759 sample_info.loopend -= sample_info.start;
760 sample_info.start = 0;
761
762 if (validate_sample_info(&sample_info) < 0)
763 return -EINVAL;
764 }
765
766 /* Allocate a new sample structure */
767 sp = sf_sample_new(sflist, sf);
768 if (!sp)
769 return -ENOMEM;
770
771 sp->v = sample_info;
772 sp->v.sf_id = sf->id;
773 sp->v.dummy = 0;
774 sp->v.truesize = 0;
775
776 /*
777 * If there is wave data then load it.
778 */
779 if (sp->v.size > 0) {
780 int rc;
781 rc = sflist->callback.sample_new
782 (sflist->callback.private_data, sp, sflist->memhdr,
783 data, count);
784 if (rc < 0) {
785 sf_sample_delete(sflist, sf, sp);
786 return rc;
787 }
788 sflist->mem_used += sp->v.truesize;
789 }
790
791 return count;
792 }
793
794
795 /* log2_tbl[i] = log2(i+128) * 0x10000 */
796 static const int log_tbl[129] = {
797 0x70000, 0x702df, 0x705b9, 0x7088e, 0x70b5d, 0x70e26, 0x710eb, 0x713aa,
798 0x71663, 0x71918, 0x71bc8, 0x71e72, 0x72118, 0x723b9, 0x72655, 0x728ed,
799 0x72b80, 0x72e0e, 0x73098, 0x7331d, 0x7359e, 0x7381b, 0x73a93, 0x73d08,
800 0x73f78, 0x741e4, 0x7444c, 0x746b0, 0x74910, 0x74b6c, 0x74dc4, 0x75019,
801 0x75269, 0x754b6, 0x75700, 0x75946, 0x75b88, 0x75dc7, 0x76002, 0x7623a,
802 0x7646e, 0x766a0, 0x768cd, 0x76af8, 0x76d1f, 0x76f43, 0x77164, 0x77382,
803 0x7759d, 0x777b4, 0x779c9, 0x77bdb, 0x77dea, 0x77ff5, 0x781fe, 0x78404,
804 0x78608, 0x78808, 0x78a06, 0x78c01, 0x78df9, 0x78fef, 0x791e2, 0x793d2,
805 0x795c0, 0x797ab, 0x79993, 0x79b79, 0x79d5d, 0x79f3e, 0x7a11d, 0x7a2f9,
806 0x7a4d3, 0x7a6ab, 0x7a880, 0x7aa53, 0x7ac24, 0x7adf2, 0x7afbe, 0x7b188,
807 0x7b350, 0x7b515, 0x7b6d8, 0x7b899, 0x7ba58, 0x7bc15, 0x7bdd0, 0x7bf89,
808 0x7c140, 0x7c2f5, 0x7c4a7, 0x7c658, 0x7c807, 0x7c9b3, 0x7cb5e, 0x7cd07,
809 0x7ceae, 0x7d053, 0x7d1f7, 0x7d398, 0x7d538, 0x7d6d6, 0x7d872, 0x7da0c,
810 0x7dba4, 0x7dd3b, 0x7ded0, 0x7e063, 0x7e1f4, 0x7e384, 0x7e512, 0x7e69f,
811 0x7e829, 0x7e9b3, 0x7eb3a, 0x7ecc0, 0x7ee44, 0x7efc7, 0x7f148, 0x7f2c8,
812 0x7f446, 0x7f5c2, 0x7f73d, 0x7f8b7, 0x7fa2f, 0x7fba5, 0x7fd1a, 0x7fe8d,
813 0x80000,
814 };
815
816 /* convert from linear to log value
817 *
818 * conversion: value = log2(amount / base) * ratio
819 *
820 * argument:
821 * amount = linear value (unsigned, 32bit max)
822 * offset = base offset (:= log2(base) * 0x10000)
823 * ratio = division ratio
824 *
825 */
826 int
snd_sf_linear_to_log(unsigned int amount,int offset,int ratio)827 snd_sf_linear_to_log(unsigned int amount, int offset, int ratio)
828 {
829 int v;
830 int s, low, bit;
831
832 if (amount < 2)
833 return 0;
834 for (bit = 0; ! (amount & 0x80000000L); bit++)
835 amount <<= 1;
836 s = (amount >> 24) & 0x7f;
837 low = (amount >> 16) & 0xff;
838 /* linear approximation by lower 8 bit */
839 v = (log_tbl[s + 1] * low + log_tbl[s] * (0x100 - low)) >> 8;
840 v -= offset;
841 v = (v * ratio) >> 16;
842 v += (24 - bit) * ratio;
843 return v;
844 }
845
846 EXPORT_SYMBOL(snd_sf_linear_to_log);
847
848
849 #define OFFSET_MSEC 653117 /* base = 1000 */
850 #define OFFSET_ABSCENT 851781 /* base = 8176 */
851 #define OFFSET_SAMPLERATE 1011119 /* base = 44100 */
852
853 #define ABSCENT_RATIO 1200
854 #define TIMECENT_RATIO 1200
855 #define SAMPLERATE_RATIO 4096
856
857 /*
858 * mHz to abscent
859 * conversion: abscent = log2(MHz / 8176) * 1200
860 */
861 static int
freq_to_note(int mhz)862 freq_to_note(int mhz)
863 {
864 return snd_sf_linear_to_log(mhz, OFFSET_ABSCENT, ABSCENT_RATIO);
865 }
866
867 /* convert Hz to AWE32 rate offset:
868 * sample pitch offset for the specified sample rate
869 * rate=44100 is no offset, each 4096 is 1 octave (twice).
870 * eg, when rate is 22050, this offset becomes -4096.
871 *
872 * conversion: offset = log2(Hz / 44100) * 4096
873 */
874 static int
calc_rate_offset(int hz)875 calc_rate_offset(int hz)
876 {
877 return snd_sf_linear_to_log(hz, OFFSET_SAMPLERATE, SAMPLERATE_RATIO);
878 }
879
880
881 /* calculate GUS envelope time */
882 static int
calc_gus_envelope_time(int rate,int start,int end)883 calc_gus_envelope_time(int rate, int start, int end)
884 {
885 int r, p, t;
886 r = (3 - ((rate >> 6) & 3)) * 3;
887 p = rate & 0x3f;
888 if (!p)
889 p = 1;
890 t = end - start;
891 if (t < 0) t = -t;
892 if (13 > r)
893 t = t << (13 - r);
894 else
895 t = t >> (r - 13);
896 return (t * 10) / (p * 441);
897 }
898
899 /* convert envelope time parameter to soundfont parameters */
900
901 /* attack & decay/release time table (msec) */
902 static const short attack_time_tbl[128] = {
903 32767, 32767, 5989, 4235, 2994, 2518, 2117, 1780, 1497, 1373, 1259, 1154, 1058, 970, 890, 816,
904 707, 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377,
905 361, 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188,
906 180, 172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94,
907 90, 86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47,
908 45, 43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23,
909 22, 21, 20, 19, 19, 18, 17, 16, 16, 15, 15, 14, 13, 13, 12, 12,
910 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 0,
911 };
912
913 static const short decay_time_tbl[128] = {
914 32767, 32767, 22614, 15990, 11307, 9508, 7995, 6723, 5653, 5184, 4754, 4359, 3997, 3665, 3361, 3082,
915 2828, 2765, 2648, 2535, 2428, 2325, 2226, 2132, 2042, 1955, 1872, 1793, 1717, 1644, 1574, 1507,
916 1443, 1382, 1324, 1267, 1214, 1162, 1113, 1066, 978, 936, 897, 859, 822, 787, 754, 722,
917 691, 662, 634, 607, 581, 557, 533, 510, 489, 468, 448, 429, 411, 393, 377, 361,
918 345, 331, 317, 303, 290, 278, 266, 255, 244, 234, 224, 214, 205, 196, 188, 180,
919 172, 165, 158, 151, 145, 139, 133, 127, 122, 117, 112, 107, 102, 98, 94, 90,
920 86, 82, 79, 75, 72, 69, 66, 63, 61, 58, 56, 53, 51, 49, 47, 45,
921 43, 41, 39, 37, 36, 34, 33, 31, 30, 29, 28, 26, 25, 24, 23, 22,
922 };
923
924 /* delay time = 0x8000 - msec/92 */
925 int
snd_sf_calc_parm_hold(int msec)926 snd_sf_calc_parm_hold(int msec)
927 {
928 int val = (0x7f * 92 - msec) / 92;
929 if (val < 1) val = 1;
930 if (val >= 126) val = 126;
931 return val;
932 }
933
934 /* search an index for specified time from given time table */
935 static int
calc_parm_search(int msec,const short * table)936 calc_parm_search(int msec, const short *table)
937 {
938 int left = 1, right = 127, mid;
939 while (left < right) {
940 mid = (left + right) / 2;
941 if (msec < (int)table[mid])
942 left = mid + 1;
943 else
944 right = mid;
945 }
946 return left;
947 }
948
949 /* attack time: search from time table */
950 int
snd_sf_calc_parm_attack(int msec)951 snd_sf_calc_parm_attack(int msec)
952 {
953 return calc_parm_search(msec, attack_time_tbl);
954 }
955
956 /* decay/release time: search from time table */
957 int
snd_sf_calc_parm_decay(int msec)958 snd_sf_calc_parm_decay(int msec)
959 {
960 return calc_parm_search(msec, decay_time_tbl);
961 }
962
963 int snd_sf_vol_table[128] = {
964 255,111,95,86,79,74,70,66,63,61,58,56,54,52,50,49,
965 47,46,45,43,42,41,40,39,38,37,36,35,34,34,33,32,
966 31,31,30,29,29,28,27,27,26,26,25,24,24,23,23,22,
967 22,21,21,21,20,20,19,19,18,18,18,17,17,16,16,16,
968 15,15,15,14,14,14,13,13,13,12,12,12,11,11,11,10,
969 10,10,10,9,9,9,8,8,8,8,7,7,7,7,6,6,
970 6,6,5,5,5,5,5,4,4,4,4,3,3,3,3,3,
971 2,2,2,2,2,1,1,1,1,1,0,0,0,0,0,0,
972 };
973
974
975 #define calc_gus_sustain(val) (0x7f - snd_sf_vol_table[(val)/2])
976 #define calc_gus_attenuation(val) snd_sf_vol_table[(val)/2]
977
978 /* load GUS patch */
979 static int
load_guspatch(struct snd_card * card,struct snd_sf_list * sflist,const char __user * data,long count)980 load_guspatch(struct snd_card *card,
981 struct snd_sf_list *sflist, const char __user *data, long count)
982 {
983 struct patch_info patch;
984 struct snd_soundfont *sf;
985 struct snd_sf_zone *zone;
986 struct snd_sf_sample *smp;
987 int note, sample_id;
988 int rc;
989
990 if (count < (long)sizeof(patch)) {
991 dev_err(card->dev, "patch record too small %ld\n", count);
992 return -EINVAL;
993 }
994 if (copy_from_user(&patch, data, sizeof(patch)))
995 return -EFAULT;
996 count -= sizeof(patch);
997 data += sizeof(patch);
998
999 if ((patch.len << (patch.mode & WAVE_16_BITS ? 1 : 0)) != count)
1000 return -EINVAL;
1001
1002 sf = newsf(sflist, SNDRV_SFNT_PAT_TYPE_GUS|SNDRV_SFNT_PAT_SHARED, NULL);
1003 if (sf == NULL)
1004 return -ENOMEM;
1005 smp = sf_sample_new(sflist, sf);
1006 if (!smp)
1007 return -ENOMEM;
1008 sample_id = sflist->sample_counter;
1009 smp->v.sample = sample_id;
1010 smp->v.start = 0;
1011 smp->v.end = patch.len;
1012 smp->v.loopstart = patch.loop_start;
1013 smp->v.loopend = patch.loop_end;
1014 smp->v.size = patch.len;
1015
1016 if (validate_sample_info(&smp->v) < 0) {
1017 sf_sample_delete(sflist, sf, smp);
1018 return -EINVAL;
1019 }
1020
1021 /* set up mode flags */
1022 smp->v.mode_flags = 0;
1023 if (!(patch.mode & WAVE_16_BITS))
1024 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_8BITS;
1025 if (patch.mode & WAVE_UNSIGNED)
1026 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_UNSIGNED;
1027 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_NO_BLANK;
1028 if (!(patch.mode & (WAVE_LOOPING|WAVE_BIDIR_LOOP|WAVE_LOOP_BACK)))
1029 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_SINGLESHOT;
1030 if (patch.mode & WAVE_BIDIR_LOOP)
1031 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_BIDIR_LOOP;
1032 if (patch.mode & WAVE_LOOP_BACK)
1033 smp->v.mode_flags |= SNDRV_SFNT_SAMPLE_REVERSE_LOOP;
1034
1035 if (patch.mode & WAVE_16_BITS) {
1036 /* convert to word offsets */
1037 smp->v.size /= 2;
1038 smp->v.end /= 2;
1039 smp->v.loopstart /= 2;
1040 smp->v.loopend /= 2;
1041 }
1042 /*smp->v.loopend++;*/
1043
1044 smp->v.dummy = 0;
1045 smp->v.truesize = 0;
1046 smp->v.sf_id = sf->id;
1047
1048 /* set up voice info */
1049 zone = sf_zone_new(sflist, sf);
1050 if (!zone) {
1051 sf_sample_delete(sflist, sf, smp);
1052 return -ENOMEM;
1053 }
1054
1055 /*
1056 * load wave data
1057 */
1058 if (smp->v.size > 0) {
1059 rc = sflist->callback.sample_new
1060 (sflist->callback.private_data, smp, sflist->memhdr,
1061 data, count);
1062 if (rc < 0) {
1063 sf_sample_delete(sflist, sf, smp);
1064 kfree(zone);
1065 return rc;
1066 }
1067 /* memory offset is updated after */
1068 }
1069
1070 /* update the memory offset here */
1071 sflist->mem_used += smp->v.truesize;
1072
1073 zone->v.sample = sample_id; /* the last sample */
1074 zone->v.rate_offset = calc_rate_offset(patch.base_freq);
1075 note = freq_to_note(patch.base_note);
1076 zone->v.root = note / 100;
1077 zone->v.tune = -(note % 100);
1078 zone->v.low = (freq_to_note(patch.low_note) + 99) / 100;
1079 zone->v.high = freq_to_note(patch.high_note) / 100;
1080 /* panning position; -128 - 127 => 0-127 */
1081 zone->v.pan = (patch.panning + 128) / 2;
1082 #if 0
1083 pr_debug(
1084 "gus: basefrq=%d (ofs=%d) root=%d,tune=%d, range:%d-%d\n",
1085 (int)patch.base_freq, zone->v.rate_offset,
1086 zone->v.root, zone->v.tune, zone->v.low, zone->v.high);
1087 #endif
1088
1089 /* detuning is ignored */
1090 /* 6points volume envelope */
1091 if (patch.mode & WAVE_ENVELOPES) {
1092 int attack, hold, decay, release;
1093 attack = calc_gus_envelope_time
1094 (patch.env_rate[0], 0, patch.env_offset[0]);
1095 hold = calc_gus_envelope_time
1096 (patch.env_rate[1], patch.env_offset[0],
1097 patch.env_offset[1]);
1098 decay = calc_gus_envelope_time
1099 (patch.env_rate[2], patch.env_offset[1],
1100 patch.env_offset[2]);
1101 release = calc_gus_envelope_time
1102 (patch.env_rate[3], patch.env_offset[1],
1103 patch.env_offset[4]);
1104 release += calc_gus_envelope_time
1105 (patch.env_rate[4], patch.env_offset[3],
1106 patch.env_offset[4]);
1107 release += calc_gus_envelope_time
1108 (patch.env_rate[5], patch.env_offset[4],
1109 patch.env_offset[5]);
1110 zone->v.parm.volatkhld =
1111 (snd_sf_calc_parm_hold(hold) << 8) |
1112 snd_sf_calc_parm_attack(attack);
1113 zone->v.parm.voldcysus = (calc_gus_sustain(patch.env_offset[2]) << 8) |
1114 snd_sf_calc_parm_decay(decay);
1115 zone->v.parm.volrelease = 0x8000 | snd_sf_calc_parm_decay(release);
1116 zone->v.attenuation = calc_gus_attenuation(patch.env_offset[0]);
1117 #if 0
1118 dev_dbg(card->dev,
1119 "gus: atkhld=%x, dcysus=%x, volrel=%x, att=%d\n",
1120 zone->v.parm.volatkhld,
1121 zone->v.parm.voldcysus,
1122 zone->v.parm.volrelease,
1123 zone->v.attenuation);
1124 #endif
1125 }
1126
1127 /* fast release */
1128 if (patch.mode & WAVE_FAST_RELEASE) {
1129 zone->v.parm.volrelease = 0x807f;
1130 }
1131
1132 /* tremolo effect */
1133 if (patch.mode & WAVE_TREMOLO) {
1134 int rate = (patch.tremolo_rate * 1000 / 38) / 42;
1135 zone->v.parm.tremfrq = ((patch.tremolo_depth / 2) << 8) | rate;
1136 }
1137 /* vibrato effect */
1138 if (patch.mode & WAVE_VIBRATO) {
1139 int rate = (patch.vibrato_rate * 1000 / 38) / 42;
1140 zone->v.parm.fm2frq2 = ((patch.vibrato_depth / 6) << 8) | rate;
1141 }
1142
1143 /* scale_freq, scale_factor, volume, and fractions not implemented */
1144
1145 if (!(smp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT))
1146 zone->v.mode = SNDRV_SFNT_MODE_LOOPING;
1147 else
1148 zone->v.mode = 0;
1149
1150 /* append to the tail of the list */
1151 /*zone->bank = ctrls[AWE_MD_GUS_BANK];*/
1152 zone->bank = 0;
1153 zone->instr = patch.instr_no;
1154 zone->mapped = 0;
1155 zone->v.sf_id = sf->id;
1156
1157 zone->sample = set_sample(sf, &zone->v);
1158
1159 /* rebuild preset now */
1160 add_preset(sflist, zone);
1161
1162 return 0;
1163 }
1164
1165 /* load GUS patch */
1166 int
snd_soundfont_load_guspatch(struct snd_card * card,struct snd_sf_list * sflist,const char __user * data,long count)1167 snd_soundfont_load_guspatch(struct snd_card *card,
1168 struct snd_sf_list *sflist, const char __user *data,
1169 long count)
1170 {
1171 int rc;
1172 lock_preset(sflist);
1173 rc = load_guspatch(card, sflist, data, count);
1174 unlock_preset(sflist);
1175 return rc;
1176 }
1177
1178
1179 /*
1180 * Rebuild the preset table. This is like a hash table in that it allows
1181 * quick access to the zone information. For each preset there are zone
1182 * structures linked by next_instr and by next_zone. Former is the whole
1183 * link for this preset, and latter is the link for zone (i.e. instrument/
1184 * bank/key combination).
1185 */
1186 static void
rebuild_presets(struct snd_sf_list * sflist)1187 rebuild_presets(struct snd_sf_list *sflist)
1188 {
1189 struct snd_soundfont *sf;
1190 struct snd_sf_zone *cur;
1191
1192 /* clear preset table */
1193 memset(sflist->presets, 0, sizeof(sflist->presets));
1194
1195 /* search all fonts and insert each font */
1196 for (sf = sflist->fonts; sf; sf = sf->next) {
1197 for (cur = sf->zones; cur; cur = cur->next) {
1198 if (! cur->mapped && cur->sample == NULL) {
1199 /* try again to search the corresponding sample */
1200 cur->sample = set_sample(sf, &cur->v);
1201 if (cur->sample == NULL)
1202 continue;
1203 }
1204
1205 add_preset(sflist, cur);
1206 }
1207 }
1208 }
1209
1210
1211 /*
1212 * add the given zone to preset table
1213 */
1214 static void
add_preset(struct snd_sf_list * sflist,struct snd_sf_zone * cur)1215 add_preset(struct snd_sf_list *sflist, struct snd_sf_zone *cur)
1216 {
1217 struct snd_sf_zone *zone;
1218 int index;
1219
1220 zone = search_first_zone(sflist, cur->bank, cur->instr, cur->v.low);
1221 if (zone && zone->v.sf_id != cur->v.sf_id) {
1222 /* different instrument was already defined */
1223 struct snd_sf_zone *p;
1224 /* compare the allocated time */
1225 for (p = zone; p; p = p->next_zone) {
1226 if (p->counter > cur->counter)
1227 /* the current is older.. skipped */
1228 return;
1229 }
1230 /* remove old zones */
1231 delete_preset(sflist, zone);
1232 zone = NULL; /* do not forget to clear this! */
1233 }
1234
1235 /* prepend this zone */
1236 index = get_index(cur->bank, cur->instr, cur->v.low);
1237 if (index < 0)
1238 return;
1239 cur->next_zone = zone; /* zone link */
1240 cur->next_instr = sflist->presets[index]; /* preset table link */
1241 sflist->presets[index] = cur;
1242 }
1243
1244 /*
1245 * delete the given zones from preset_table
1246 */
1247 static void
delete_preset(struct snd_sf_list * sflist,struct snd_sf_zone * zp)1248 delete_preset(struct snd_sf_list *sflist, struct snd_sf_zone *zp)
1249 {
1250 int index;
1251 struct snd_sf_zone *p;
1252
1253 index = get_index(zp->bank, zp->instr, zp->v.low);
1254 if (index < 0)
1255 return;
1256 for (p = sflist->presets[index]; p; p = p->next_instr) {
1257 while (p->next_instr == zp) {
1258 p->next_instr = zp->next_instr;
1259 zp = zp->next_zone;
1260 if (zp == NULL)
1261 return;
1262 }
1263 }
1264 }
1265
1266
1267 /*
1268 * Search matching zones from preset table.
1269 * The note can be rewritten by preset mapping (alias).
1270 * The found zones are stored on 'table' array. max_layers defines
1271 * the maximum number of elements in this array.
1272 * This function returns the number of found zones. 0 if not found.
1273 */
1274 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)1275 snd_soundfont_search_zone(struct snd_sf_list *sflist, int *notep, int vel,
1276 int preset, int bank,
1277 int def_preset, int def_bank,
1278 struct snd_sf_zone **table, int max_layers)
1279 {
1280 int nvoices;
1281 unsigned long flags;
1282
1283 /* this function is supposed to be called atomically,
1284 * so we check the lock. if it's busy, just returns 0 to
1285 * tell the caller the busy state
1286 */
1287 spin_lock_irqsave(&sflist->lock, flags);
1288 if (sflist->presets_locked) {
1289 spin_unlock_irqrestore(&sflist->lock, flags);
1290 return 0;
1291 }
1292 nvoices = search_zones(sflist, notep, vel, preset, bank,
1293 table, max_layers, 0);
1294 if (! nvoices) {
1295 if (preset != def_preset || bank != def_bank)
1296 nvoices = search_zones(sflist, notep, vel,
1297 def_preset, def_bank,
1298 table, max_layers, 0);
1299 }
1300 spin_unlock_irqrestore(&sflist->lock, flags);
1301 return nvoices;
1302 }
1303
1304
1305 /*
1306 * search the first matching zone
1307 */
1308 static struct snd_sf_zone *
search_first_zone(struct snd_sf_list * sflist,int bank,int preset,int key)1309 search_first_zone(struct snd_sf_list *sflist, int bank, int preset, int key)
1310 {
1311 int index;
1312 struct snd_sf_zone *zp;
1313
1314 index = get_index(bank, preset, key);
1315 if (index < 0)
1316 return NULL;
1317 for (zp = sflist->presets[index]; zp; zp = zp->next_instr) {
1318 if (zp->instr == preset && zp->bank == bank)
1319 return zp;
1320 }
1321 return NULL;
1322 }
1323
1324
1325 /*
1326 * search matching zones from sflist. can be called recursively.
1327 */
1328 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)1329 search_zones(struct snd_sf_list *sflist, int *notep, int vel,
1330 int preset, int bank, struct snd_sf_zone **table,
1331 int max_layers, int level)
1332 {
1333 struct snd_sf_zone *zp;
1334 int nvoices;
1335
1336 zp = search_first_zone(sflist, bank, preset, *notep);
1337 nvoices = 0;
1338 for (; zp; zp = zp->next_zone) {
1339 if (*notep >= zp->v.low && *notep <= zp->v.high &&
1340 vel >= zp->v.vellow && vel <= zp->v.velhigh) {
1341 if (zp->mapped) {
1342 /* search preset mapping (aliasing) */
1343 int key = zp->v.fixkey;
1344 preset = zp->v.start;
1345 bank = zp->v.end;
1346
1347 if (level > 5) /* too deep alias level */
1348 return 0;
1349 if (key < 0)
1350 key = *notep;
1351 nvoices = search_zones(sflist, &key, vel,
1352 preset, bank, table,
1353 max_layers, level + 1);
1354 if (nvoices > 0)
1355 *notep = key;
1356 break;
1357 }
1358 table[nvoices++] = zp;
1359 if (nvoices >= max_layers)
1360 break;
1361 }
1362 }
1363
1364 return nvoices;
1365 }
1366
1367
1368 /* calculate the index of preset table:
1369 * drums are mapped from 128 to 255 according to its note key.
1370 * other instruments are mapped from 0 to 127.
1371 * if the index is out of range, return -1.
1372 */
1373 static int
get_index(int bank,int instr,int key)1374 get_index(int bank, int instr, int key)
1375 {
1376 int index;
1377 if (SF_IS_DRUM_BANK(bank))
1378 index = key + SF_MAX_INSTRUMENTS;
1379 else
1380 index = instr;
1381 index = index % SF_MAX_PRESETS;
1382 if (index < 0)
1383 return -1;
1384 return index;
1385 }
1386
1387 /*
1388 * Initialise the sflist structure.
1389 */
1390 static void
snd_sf_init(struct snd_sf_list * sflist)1391 snd_sf_init(struct snd_sf_list *sflist)
1392 {
1393 memset(sflist->presets, 0, sizeof(sflist->presets));
1394
1395 sflist->mem_used = 0;
1396 sflist->currsf = NULL;
1397 sflist->open_client = -1;
1398 sflist->fonts = NULL;
1399 sflist->fonts_size = 0;
1400 sflist->zone_counter = 0;
1401 sflist->sample_counter = 0;
1402 sflist->zone_locked = 0;
1403 sflist->sample_locked = 0;
1404 }
1405
1406 /*
1407 * Release all list records
1408 */
1409 static void
snd_sf_clear(struct snd_sf_list * sflist)1410 snd_sf_clear(struct snd_sf_list *sflist)
1411 {
1412 struct snd_soundfont *sf, *nextsf;
1413 struct snd_sf_zone *zp, *nextzp;
1414 struct snd_sf_sample *sp, *nextsp;
1415
1416 for (sf = sflist->fonts; sf; sf = nextsf) {
1417 nextsf = sf->next;
1418 for (zp = sf->zones; zp; zp = nextzp) {
1419 nextzp = zp->next;
1420 kfree(zp);
1421 }
1422 for (sp = sf->samples; sp; sp = nextsp) {
1423 nextsp = sp->next;
1424 sflist->callback.sample_free(sflist->callback.private_data,
1425 sp, sflist->memhdr);
1426 kfree(sp);
1427 }
1428 kfree(sf);
1429 }
1430
1431 snd_sf_init(sflist);
1432 }
1433
1434
1435 /*
1436 * Create a new sflist structure
1437 */
1438 struct snd_sf_list *
snd_sf_new(struct snd_sf_callback * callback,struct snd_util_memhdr * hdr)1439 snd_sf_new(struct snd_sf_callback *callback, struct snd_util_memhdr *hdr)
1440 {
1441 struct snd_sf_list *sflist;
1442
1443 sflist = kzalloc(sizeof(*sflist), GFP_KERNEL);
1444 if (!sflist)
1445 return NULL;
1446
1447 mutex_init(&sflist->presets_mutex);
1448 spin_lock_init(&sflist->lock);
1449 sflist->memhdr = hdr;
1450
1451 if (callback)
1452 sflist->callback = *callback;
1453
1454 snd_sf_init(sflist);
1455 return sflist;
1456 }
1457
1458
1459 /*
1460 * Free everything allocated off the sflist structure.
1461 */
1462 void
snd_sf_free(struct snd_sf_list * sflist)1463 snd_sf_free(struct snd_sf_list *sflist)
1464 {
1465 if (sflist == NULL)
1466 return;
1467
1468 lock_preset(sflist);
1469 if (sflist->callback.sample_reset)
1470 sflist->callback.sample_reset(sflist->callback.private_data);
1471 snd_sf_clear(sflist);
1472 unlock_preset(sflist);
1473
1474 kfree(sflist);
1475 }
1476
1477 /*
1478 * Remove all samples
1479 * The soundcard should be silent before calling this function.
1480 */
1481 int
snd_soundfont_remove_samples(struct snd_sf_list * sflist)1482 snd_soundfont_remove_samples(struct snd_sf_list *sflist)
1483 {
1484 lock_preset(sflist);
1485 if (sflist->callback.sample_reset)
1486 sflist->callback.sample_reset(sflist->callback.private_data);
1487 snd_sf_clear(sflist);
1488 unlock_preset(sflist);
1489
1490 return 0;
1491 }
1492
1493 /*
1494 * Remove unlocked samples.
1495 * The soundcard should be silent before calling this function.
1496 */
1497 int
snd_soundfont_remove_unlocked(struct snd_sf_list * sflist)1498 snd_soundfont_remove_unlocked(struct snd_sf_list *sflist)
1499 {
1500 struct snd_soundfont *sf;
1501 struct snd_sf_zone *zp, *nextzp;
1502 struct snd_sf_sample *sp, *nextsp;
1503
1504 lock_preset(sflist);
1505
1506 if (sflist->callback.sample_reset)
1507 sflist->callback.sample_reset(sflist->callback.private_data);
1508
1509 /* to be sure */
1510 memset(sflist->presets, 0, sizeof(sflist->presets));
1511
1512 for (sf = sflist->fonts; sf; sf = sf->next) {
1513 for (zp = sf->zones; zp; zp = nextzp) {
1514 if (zp->counter < sflist->zone_locked)
1515 break;
1516 nextzp = zp->next;
1517 sf->zones = nextzp;
1518 kfree(zp);
1519 }
1520
1521 for (sp = sf->samples; sp; sp = nextsp) {
1522 if (sp->counter < sflist->sample_locked)
1523 break;
1524 nextsp = sp->next;
1525 sf->samples = nextsp;
1526 sflist->mem_used -= sp->v.truesize;
1527 sflist->callback.sample_free(sflist->callback.private_data,
1528 sp, sflist->memhdr);
1529 kfree(sp);
1530 }
1531 }
1532
1533 sflist->zone_counter = sflist->zone_locked;
1534 sflist->sample_counter = sflist->sample_locked;
1535
1536 rebuild_presets(sflist);
1537
1538 unlock_preset(sflist);
1539 return 0;
1540 }
1541