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[cor_2_6_31.git] / sound / synth / emux / emux_synth.c
blob3e921b386fd5a6c81c70cf73611831fb83634bbf
1 /*
2 * Midi synth routines for the Emu8k/Emu10k1
3 *
4 * Copyright (C) 1999 Steve Ratcliffe
5 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
6 *
7 * Contains code based on awe_wave.c by Takashi Iwai
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include "emux_voice.h"
26 #include <sound/asoundef.h>
27
28 /*
29 * Prototypes
30 */
31
32 /*
33 * Ensure a value is between two points
34 * macro evaluates its args more than once, so changed to upper-case.
35 */
36 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
37 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
38
39 static int get_zone(struct snd_emux *emu, struct snd_emux_port *port,
40 int *notep, int vel, struct snd_midi_channel *chan,
41 struct snd_sf_zone **table);
42 static int get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan);
43 static void terminate_note1(struct snd_emux *emu, int note,
44 struct snd_midi_channel *chan, int free);
45 static void exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port,
46 int exclass);
47 static void terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free);
48 static void update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update);
49 static void setup_voice(struct snd_emux_voice *vp);
50 static int calc_pan(struct snd_emux_voice *vp);
51 static int calc_volume(struct snd_emux_voice *vp);
52 static int calc_pitch(struct snd_emux_voice *vp);
53
54
55 /*
56 * Start a note.
57 */
58 void
59 snd_emux_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
60 {
61 struct snd_emux *emu;
62 int i, key, nvoices;
63 struct snd_emux_voice *vp;
64 struct snd_sf_zone *table[SNDRV_EMUX_MAX_MULTI_VOICES];
65 unsigned long flags;
66 struct snd_emux_port *port;
67
68 port = p;
69 if (snd_BUG_ON(!port || !chan))
70 return;
71
72 emu = port->emu;
73 if (snd_BUG_ON(!emu || !emu->ops.get_voice || !emu->ops.trigger))
74 return;
75
76 key = note; /* remember the original note */
77 nvoices = get_zone(emu, port, &note, vel, chan, table);
78 if (! nvoices)
79 return;
80
81 /* exclusive note off */
82 for (i = 0; i < nvoices; i++) {
83 struct snd_sf_zone *zp = table[i];
84 if (zp && zp->v.exclusiveClass)
85 exclusive_note_off(emu, port, zp->v.exclusiveClass);
86 }
87
88 #if 0 // seems not necessary
89 /* Turn off the same note on the same channel. */
90 terminate_note1(emu, key, chan, 0);
91 #endif
92
93 spin_lock_irqsave(&emu->voice_lock, flags);
94 for (i = 0; i < nvoices; i++) {
95
96 /* set up each voice parameter */
97 /* at this stage, we don't trigger the voice yet. */
98
99 if (table[i] == NULL)
100 continue;
101
102 vp = emu->ops.get_voice(emu, port);
103 if (vp == NULL || vp->ch < 0)
104 continue;
105 if (STATE_IS_PLAYING(vp->state))
106 emu->ops.terminate(vp);
107
108 vp->time = emu->use_time++;
109 vp->chan = chan;
110 vp->port = port;
111 vp->key = key;
112 vp->note = note;
113 vp->velocity = vel;
114 vp->zone = table[i];
115 if (vp->zone->sample)
116 vp->block = vp->zone->sample->block;
117 else
118 vp->block = NULL;
119
120 setup_voice(vp);
121
122 vp->state = SNDRV_EMUX_ST_STANDBY;
123 if (emu->ops.prepare) {
124 vp->state = SNDRV_EMUX_ST_OFF;
125 if (emu->ops.prepare(vp) >= 0)
126 vp->state = SNDRV_EMUX_ST_STANDBY;
127 }
128 }
129
130 /* start envelope now */
131 for (i = 0; i < emu->max_voices; i++) {
132 vp = &emu->voices[i];
133 if (vp->state == SNDRV_EMUX_ST_STANDBY &&
134 vp->chan == chan) {
135 emu->ops.trigger(vp);
136 vp->state = SNDRV_EMUX_ST_ON;
137 vp->ontime = jiffies; /* remember the trigger timing */
138 }
139 }
140 spin_unlock_irqrestore(&emu->voice_lock, flags);
141
142 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
143 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
144 /* clear voice position for the next note on this channel */
145 struct snd_emux_effect_table *fx = chan->private;
146 if (fx) {
147 fx->flag[EMUX_FX_SAMPLE_START] = 0;
148 fx->flag[EMUX_FX_COARSE_SAMPLE_START] = 0;
149 }
150 }
151 #endif
152 }
153
154 /*
155 * Release a note in response to a midi note off.
156 */
157 void
158 snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
159 {
160 int ch;
161 struct snd_emux *emu;
162 struct snd_emux_voice *vp;
163 unsigned long flags;
164 struct snd_emux_port *port;
165
166 port = p;
167 if (snd_BUG_ON(!port || !chan))
168 return;
169
170 emu = port->emu;
171 if (snd_BUG_ON(!emu || !emu->ops.release))
172 return;
173
174 spin_lock_irqsave(&emu->voice_lock, flags);
175 for (ch = 0; ch < emu->max_voices; ch++) {
176 vp = &emu->voices[ch];
177 if (STATE_IS_PLAYING(vp->state) &&
178 vp->chan == chan && vp->key == note) {
179 vp->state = SNDRV_EMUX_ST_RELEASED;
180 if (vp->ontime == jiffies) {
181 /* if note-off is sent too shortly after
182 * note-on, emuX engine cannot produce the sound
183 * correctly. so we'll release this note
184 * a bit later via timer callback.
185 */
186 vp->state = SNDRV_EMUX_ST_PENDING;
187 if (! emu->timer_active) {
188 emu->tlist.expires = jiffies + 1;
189 add_timer(&emu->tlist);
190 emu->timer_active = 1;
191 }
192 } else
193 /* ok now release the note */
194 emu->ops.release(vp);
195 }
196 }
197 spin_unlock_irqrestore(&emu->voice_lock, flags);
198 }
199
200 /*
201 * timer callback
202 *
203 * release the pending note-offs
204 */
205 void snd_emux_timer_callback(unsigned long data)
206 {
207 struct snd_emux *emu = (struct snd_emux *) data;
208 struct snd_emux_voice *vp;
209 unsigned long flags;
210 int ch, do_again = 0;
211
212 spin_lock_irqsave(&emu->voice_lock, flags);
213 for (ch = 0; ch < emu->max_voices; ch++) {
214 vp = &emu->voices[ch];
215 if (vp->state == SNDRV_EMUX_ST_PENDING) {
216 if (vp->ontime == jiffies)
217 do_again++; /* release this at the next interrupt */
218 else {
219 emu->ops.release(vp);
220 vp->state = SNDRV_EMUX_ST_RELEASED;
221 }
222 }
223 }
224 if (do_again) {
225 emu->tlist.expires = jiffies + 1;
226 add_timer(&emu->tlist);
227 emu->timer_active = 1;
228 } else
229 emu->timer_active = 0;
230 spin_unlock_irqrestore(&emu->voice_lock, flags);
231 }
232
233 /*
234 * key pressure change
235 */
236 void
237 snd_emux_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
238 {
239 int ch;
240 struct snd_emux *emu;
241 struct snd_emux_voice *vp;
242 unsigned long flags;
243 struct snd_emux_port *port;
244
245 port = p;
246 if (snd_BUG_ON(!port || !chan))
247 return;
248
249 emu = port->emu;
250 if (snd_BUG_ON(!emu || !emu->ops.update))
251 return;
252
253 spin_lock_irqsave(&emu->voice_lock, flags);
254 for (ch = 0; ch < emu->max_voices; ch++) {
255 vp = &emu->voices[ch];
256 if (vp->state == SNDRV_EMUX_ST_ON &&
257 vp->chan == chan && vp->key == note) {
258 vp->velocity = vel;
259 update_voice(emu, vp, SNDRV_EMUX_UPDATE_VOLUME);
260 }
261 }
262 spin_unlock_irqrestore(&emu->voice_lock, flags);
263 }
264
265
266 /*
267 * Modulate the voices which belong to the channel
268 */
269 void
270 snd_emux_update_channel(struct snd_emux_port *port, struct snd_midi_channel *chan, int update)
271 {
272 struct snd_emux *emu;
273 struct snd_emux_voice *vp;
274 int i;
275 unsigned long flags;
276
277 if (! update)
278 return;
279
280 emu = port->emu;
281 if (snd_BUG_ON(!emu || !emu->ops.update))
282 return;
283
284 spin_lock_irqsave(&emu->voice_lock, flags);
285 for (i = 0; i < emu->max_voices; i++) {
286 vp = &emu->voices[i];
287 if (vp->chan == chan)
288 update_voice(emu, vp, update);
289 }
290 spin_unlock_irqrestore(&emu->voice_lock, flags);
291 }
292
293 /*
294 * Modulate all the voices which belong to the port.
295 */
296 void
297 snd_emux_update_port(struct snd_emux_port *port, int update)
298 {
299 struct snd_emux *emu;
300 struct snd_emux_voice *vp;
301 int i;
302 unsigned long flags;
303
304 if (! update)
305 return;
306
307 emu = port->emu;
308 if (snd_BUG_ON(!emu || !emu->ops.update))
309 return;
310
311 spin_lock_irqsave(&emu->voice_lock, flags);
312 for (i = 0; i < emu->max_voices; i++) {
313 vp = &emu->voices[i];
314 if (vp->port == port)
315 update_voice(emu, vp, update);
316 }
317 spin_unlock_irqrestore(&emu->voice_lock, flags);
318 }
319
320
321 /*
322 * Deal with a controller type event. This includes all types of
323 * control events, not just the midi controllers
324 */
325 void
326 snd_emux_control(void *p, int type, struct snd_midi_channel *chan)
327 {
328 struct snd_emux_port *port;
329
330 port = p;
331 if (snd_BUG_ON(!port || !chan))
332 return;
333
334 switch (type) {
335 case MIDI_CTL_MSB_MAIN_VOLUME:
336 case MIDI_CTL_MSB_EXPRESSION:
337 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_VOLUME);
338 break;
339
340 case MIDI_CTL_MSB_PAN:
341 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PAN);
342 break;
343
344 case MIDI_CTL_SOFT_PEDAL:
345 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
346 /* FIXME: this is an emulation */
347 if (chan->control[type] >= 64)
348 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, -160,
349 EMUX_FX_FLAG_ADD);
350 else
351 snd_emux_send_effect(port, chan, EMUX_FX_CUTOFF, 0,
352 EMUX_FX_FLAG_OFF);
353 #endif
354 break;
355
356 case MIDI_CTL_PITCHBEND:
357 snd_emux_update_channel(port, chan, SNDRV_EMUX_UPDATE_PITCH);
358 break;
359
360 case MIDI_CTL_MSB_MODWHEEL:
361 case MIDI_CTL_CHAN_PRESSURE:
362 snd_emux_update_channel(port, chan,
363 SNDRV_EMUX_UPDATE_FMMOD |
364 SNDRV_EMUX_UPDATE_FM2FRQ2);
365 break;
366
367 }
368
369 if (port->chset.midi_mode == SNDRV_MIDI_MODE_XG) {
370 snd_emux_xg_control(port, chan, type);
371 }
372 }
373
374
375 /*
376 * terminate note - if free flag is true, free the terminated voice
377 */
378 static void
379 terminate_note1(struct snd_emux *emu, int note, struct snd_midi_channel *chan, int free)
380 {
381 int i;
382 struct snd_emux_voice *vp;
383 unsigned long flags;
384
385 spin_lock_irqsave(&emu->voice_lock, flags);
386 for (i = 0; i < emu->max_voices; i++) {
387 vp = &emu->voices[i];
388 if (STATE_IS_PLAYING(vp->state) && vp->chan == chan &&
389 vp->key == note)
390 terminate_voice(emu, vp, free);
391 }
392 spin_unlock_irqrestore(&emu->voice_lock, flags);
393 }
394
395
396 /*
397 * terminate note - exported for midi emulation
398 */
399 void
400 snd_emux_terminate_note(void *p, int note, struct snd_midi_channel *chan)
401 {
402 struct snd_emux *emu;
403 struct snd_emux_port *port;
404
405 port = p;
406 if (snd_BUG_ON(!port || !chan))
407 return;
408
409 emu = port->emu;
410 if (snd_BUG_ON(!emu || !emu->ops.terminate))
411 return;
412
413 terminate_note1(emu, note, chan, 1);
414 }
415
416
417 /*
418 * Terminate all the notes
419 */
420 void
421 snd_emux_terminate_all(struct snd_emux *emu)
422 {
423 int i;
424 struct snd_emux_voice *vp;
425 unsigned long flags;
426
427 spin_lock_irqsave(&emu->voice_lock, flags);
428 for (i = 0; i < emu->max_voices; i++) {
429 vp = &emu->voices[i];
430 if (STATE_IS_PLAYING(vp->state))
431 terminate_voice(emu, vp, 0);
432 if (vp->state == SNDRV_EMUX_ST_OFF) {
433 if (emu->ops.free_voice)
434 emu->ops.free_voice(vp);
435 if (emu->ops.reset)
436 emu->ops.reset(emu, i);
437 }
438 vp->time = 0;
439 }
440 /* initialize allocation time */
441 emu->use_time = 0;
442 spin_unlock_irqrestore(&emu->voice_lock, flags);
443 }
444
445 EXPORT_SYMBOL(snd_emux_terminate_all);
446
447 /*
448 * Terminate all voices associated with the given port
449 */
450 void
451 snd_emux_sounds_off_all(struct snd_emux_port *port)
452 {
453 int i;
454 struct snd_emux *emu;
455 struct snd_emux_voice *vp;
456 unsigned long flags;
457
458 if (snd_BUG_ON(!port))
459 return;
460 emu = port->emu;
461 if (snd_BUG_ON(!emu || !emu->ops.terminate))
462 return;
463
464 spin_lock_irqsave(&emu->voice_lock, flags);
465 for (i = 0; i < emu->max_voices; i++) {
466 vp = &emu->voices[i];
467 if (STATE_IS_PLAYING(vp->state) &&
468 vp->port == port)
469 terminate_voice(emu, vp, 0);
470 if (vp->state == SNDRV_EMUX_ST_OFF) {
471 if (emu->ops.free_voice)
472 emu->ops.free_voice(vp);
473 if (emu->ops.reset)
474 emu->ops.reset(emu, i);
475 }
476 }
477 spin_unlock_irqrestore(&emu->voice_lock, flags);
478 }
479
480
481 /*
482 * Terminate all voices that have the same exclusive class. This
483 * is mainly for drums.
484 */
485 static void
486 exclusive_note_off(struct snd_emux *emu, struct snd_emux_port *port, int exclass)
487 {
488 struct snd_emux_voice *vp;
489 int i;
490 unsigned long flags;
491
492 spin_lock_irqsave(&emu->voice_lock, flags);
493 for (i = 0; i < emu->max_voices; i++) {
494 vp = &emu->voices[i];
495 if (STATE_IS_PLAYING(vp->state) && vp->port == port &&
496 vp->reg.exclusiveClass == exclass) {
497 terminate_voice(emu, vp, 0);
498 }
499 }
500 spin_unlock_irqrestore(&emu->voice_lock, flags);
501 }
502
503 /*
504 * terminate a voice
505 * if free flag is true, call free_voice after termination
506 */
507 static void
508 terminate_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int free)
509 {
510 emu->ops.terminate(vp);
511 vp->time = emu->use_time++;
512 vp->chan = NULL;
513 vp->port = NULL;
514 vp->zone = NULL;
515 vp->block = NULL;
516 vp->state = SNDRV_EMUX_ST_OFF;
517 if (free && emu->ops.free_voice)
518 emu->ops.free_voice(vp);
519 }
520
521
522 /*
523 * Modulate the voice
524 */
525 static void
526 update_voice(struct snd_emux *emu, struct snd_emux_voice *vp, int update)
527 {
528 if (!STATE_IS_PLAYING(vp->state))
529 return;
530
531 if (vp->chan == NULL || vp->port == NULL)
532 return;
533 if (update & SNDRV_EMUX_UPDATE_VOLUME)
534 calc_volume(vp);
535 if (update & SNDRV_EMUX_UPDATE_PITCH)
536 calc_pitch(vp);
537 if (update & SNDRV_EMUX_UPDATE_PAN) {
538 if (! calc_pan(vp) && (update == SNDRV_EMUX_UPDATE_PAN))
539 return;
540 }
541 emu->ops.update(vp, update);
542 }
543
544
545 #if 0 // not used
546 /* table for volume target calculation */
547 static unsigned short voltarget[16] = {
548 0xEAC0, 0xE0C8, 0xD740, 0xCE20, 0xC560, 0xBD08, 0xB500, 0xAD58,
549 0xA5F8, 0x9EF0, 0x9830, 0x91C0, 0x8B90, 0x85A8, 0x8000, 0x7A90
550 };
551 #endif
552
553 #define LO_BYTE(v) ((v) & 0xff)
554 #define HI_BYTE(v) (((v) >> 8) & 0xff)
555
556 /*
557 * Sets up the voice structure by calculating some values that
558 * will be needed later.
559 */
560 static void
561 setup_voice(struct snd_emux_voice *vp)
562 {
563 struct soundfont_voice_parm *parm;
564 int pitch;
565
566 /* copy the original register values */
567 vp->reg = vp->zone->v;
568
569 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
570 snd_emux_setup_effect(vp);
571 #endif
572
573 /* reset status */
574 vp->apan = -1;
575 vp->avol = -1;
576 vp->apitch = -1;
577
578 calc_volume(vp);
579 calc_pitch(vp);
580 calc_pan(vp);
581
582 parm = &vp->reg.parm;
583
584 /* compute filter target and correct modulation parameters */
585 if (LO_BYTE(parm->modatkhld) >= 0x80 && parm->moddelay >= 0x8000) {
586 parm->moddelay = 0xbfff;
587 pitch = (HI_BYTE(parm->pefe) << 4) + vp->apitch;
588 if (pitch > 0xffff)
589 pitch = 0xffff;
590 /* calculate filter target */
591 vp->ftarget = parm->cutoff + LO_BYTE(parm->pefe);
592 LIMITVALUE(vp->ftarget, 0, 255);
593 vp->ftarget <<= 8;
594 } else {
595 vp->ftarget = parm->cutoff;
596 vp->ftarget <<= 8;
597 pitch = vp->apitch;
598 }
599
600 /* compute pitch target */
601 if (pitch != 0xffff) {
602 vp->ptarget = 1 << (pitch >> 12);
603 if (pitch & 0x800) vp->ptarget += (vp->ptarget*0x102e)/0x2710;
604 if (pitch & 0x400) vp->ptarget += (vp->ptarget*0x764)/0x2710;
605 if (pitch & 0x200) vp->ptarget += (vp->ptarget*0x389)/0x2710;
606 vp->ptarget += (vp->ptarget >> 1);
607 if (vp->ptarget > 0xffff) vp->ptarget = 0xffff;
608 } else
609 vp->ptarget = 0xffff;
610
611 if (LO_BYTE(parm->modatkhld) >= 0x80) {
612 parm->modatkhld &= ~0xff;
613 parm->modatkhld |= 0x7f;
614 }
615
616 /* compute volume target and correct volume parameters */
617 vp->vtarget = 0;
618 #if 0 /* FIXME: this leads to some clicks.. */
619 if (LO_BYTE(parm->volatkhld) >= 0x80 && parm->voldelay >= 0x8000) {
620 parm->voldelay = 0xbfff;
621 vp->vtarget = voltarget[vp->avol % 0x10] >> (vp->avol >> 4);
622 }
623 #endif
624
625 if (LO_BYTE(parm->volatkhld) >= 0x80) {
626 parm->volatkhld &= ~0xff;
627 parm->volatkhld |= 0x7f;
628 }
629 }
630
631 /*
632 * calculate pitch parameter
633 */
634 static unsigned char pan_volumes[256] = {
635 0x00,0x03,0x06,0x09,0x0c,0x0f,0x12,0x14,0x17,0x1a,0x1d,0x20,0x22,0x25,0x28,0x2a,
636 0x2d,0x30,0x32,0x35,0x37,0x3a,0x3c,0x3f,0x41,0x44,0x46,0x49,0x4b,0x4d,0x50,0x52,
637 0x54,0x57,0x59,0x5b,0x5d,0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6f,0x71,0x73,0x75,
638 0x77,0x79,0x7b,0x7c,0x7e,0x80,0x82,0x84,0x86,0x88,0x89,0x8b,0x8d,0x8f,0x90,0x92,
639 0x94,0x96,0x97,0x99,0x9a,0x9c,0x9e,0x9f,0xa1,0xa2,0xa4,0xa5,0xa7,0xa8,0xaa,0xab,
640 0xad,0xae,0xaf,0xb1,0xb2,0xb3,0xb5,0xb6,0xb7,0xb9,0xba,0xbb,0xbc,0xbe,0xbf,0xc0,
641 0xc1,0xc2,0xc3,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,
642 0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdc,0xdd,0xde,0xdf,
643 0xdf,0xe0,0xe1,0xe2,0xe2,0xe3,0xe4,0xe4,0xe5,0xe6,0xe6,0xe7,0xe8,0xe8,0xe9,0xe9,
644 0xea,0xeb,0xeb,0xec,0xec,0xed,0xed,0xee,0xee,0xef,0xef,0xf0,0xf0,0xf1,0xf1,0xf1,
645 0xf2,0xf2,0xf3,0xf3,0xf3,0xf4,0xf4,0xf5,0xf5,0xf5,0xf6,0xf6,0xf6,0xf7,0xf7,0xf7,
646 0xf7,0xf8,0xf8,0xf8,0xf9,0xf9,0xf9,0xf9,0xf9,0xfa,0xfa,0xfa,0xfa,0xfb,0xfb,0xfb,
647 0xfb,0xfb,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,0xfd,
648 0xfd,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,0xfe,
649 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
650 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
651 };
652
653 static int
654 calc_pan(struct snd_emux_voice *vp)
655 {
656 struct snd_midi_channel *chan = vp->chan;
657 int pan;
658
659 /* pan & loop start (pan 8bit, MSB, 0:right, 0xff:left) */
660 if (vp->reg.fixpan > 0) /* 0-127 */
661 pan = 255 - (int)vp->reg.fixpan * 2;
662 else {
663 pan = chan->control[MIDI_CTL_MSB_PAN] - 64;
664 if (vp->reg.pan >= 0) /* 0-127 */
665 pan += vp->reg.pan - 64;
666 pan = 127 - (int)pan * 2;
667 }
668 LIMITVALUE(pan, 0, 255);
669
670 if (vp->emu->linear_panning) {
671 /* assuming linear volume */
672 if (pan != vp->apan) {
673 vp->apan = pan;
674 if (pan == 0)
675 vp->aaux = 0xff;
676 else
677 vp->aaux = (-pan) & 0xff;
678 return 1;
679 } else
680 return 0;
681 } else {
682 /* using volume table */
683 if (vp->apan != (int)pan_volumes[pan]) {
684 vp->apan = pan_volumes[pan];
685 vp->aaux = pan_volumes[255 - pan];
686 return 1;
687 }
688 return 0;
689 }
690 }
691
692
693 /*
694 * calculate volume attenuation
695 *
696 * Voice volume is controlled by volume attenuation parameter.
697 * So volume becomes maximum when avol is 0 (no attenuation), and
698 * minimum when 255 (-96dB or silence).
699 */
700
701 /* tables for volume->attenuation calculation */
702 static unsigned char voltab1[128] = {
703 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
704 0x63, 0x2b, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22,
705 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a,
706 0x19, 0x19, 0x18, 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x14,
707 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10,
708 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0e, 0x0d,
709 0x0d, 0x0d, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b,
710 0x0b, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09,
711 0x08, 0x08, 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06,
712 0x06, 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x04,
713 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x02,
714 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01,
715 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
716 };
717
718 static unsigned char voltab2[128] = {
719 0x32, 0x31, 0x30, 0x2f, 0x2e, 0x2d, 0x2c, 0x2b, 0x2a, 0x2a,
720 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x24, 0x23, 0x22, 0x21,
721 0x21, 0x20, 0x1f, 0x1e, 0x1e, 0x1d, 0x1c, 0x1c, 0x1b, 0x1a,
722 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17, 0x16, 0x16, 0x15, 0x15,
723 0x14, 0x14, 0x13, 0x13, 0x13, 0x12, 0x12, 0x11, 0x11, 0x10,
724 0x10, 0x10, 0x0f, 0x0f, 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d,
725 0x0d, 0x0c, 0x0c, 0x0c, 0x0b, 0x0b, 0x0b, 0x0b, 0x0a, 0x0a,
726 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09, 0x09, 0x08, 0x08, 0x08,
727 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
728 0x06, 0x06, 0x06, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
729 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03,
730 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01,
731 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
732 };
733
734 static unsigned char expressiontab[128] = {
735 0x7f, 0x6c, 0x62, 0x5a, 0x54, 0x50, 0x4b, 0x48, 0x45, 0x42,
736 0x40, 0x3d, 0x3b, 0x39, 0x38, 0x36, 0x34, 0x33, 0x31, 0x30,
737 0x2f, 0x2d, 0x2c, 0x2b, 0x2a, 0x29, 0x28, 0x27, 0x26, 0x25,
738 0x24, 0x24, 0x23, 0x22, 0x21, 0x21, 0x20, 0x1f, 0x1e, 0x1e,
739 0x1d, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a, 0x1a, 0x19, 0x18, 0x18,
740 0x17, 0x17, 0x16, 0x16, 0x15, 0x15, 0x15, 0x14, 0x14, 0x13,
741 0x13, 0x12, 0x12, 0x11, 0x11, 0x11, 0x10, 0x10, 0x0f, 0x0f,
742 0x0f, 0x0e, 0x0e, 0x0e, 0x0d, 0x0d, 0x0d, 0x0c, 0x0c, 0x0c,
743 0x0b, 0x0b, 0x0b, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x09, 0x09,
744 0x08, 0x08, 0x08, 0x07, 0x07, 0x07, 0x07, 0x06, 0x06, 0x06,
745 0x06, 0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03,
746 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,
747 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
748 };
749
750 /*
751 * Magic to calculate the volume (actually attenuation) from all the
752 * voice and channels parameters.
753 */
754 static int
755 calc_volume(struct snd_emux_voice *vp)
756 {
757 int vol;
758 int main_vol, expression_vol, master_vol;
759 struct snd_midi_channel *chan = vp->chan;
760 struct snd_emux_port *port = vp->port;
761
762 expression_vol = chan->control[MIDI_CTL_MSB_EXPRESSION];
763 LIMITMAX(vp->velocity, 127);
764 LIMITVALUE(expression_vol, 0, 127);
765 if (port->port_mode == SNDRV_EMUX_PORT_MODE_OSS_SYNTH) {
766 /* 0 - 127 */
767 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME];
768 vol = (vp->velocity * main_vol * expression_vol) / (127*127);
769 vol = vol * vp->reg.amplitude / 127;
770
771 LIMITVALUE(vol, 0, 127);
772
773 /* calc to attenuation */
774 vol = snd_sf_vol_table[vol];
775
776 } else {
777 main_vol = chan->control[MIDI_CTL_MSB_MAIN_VOLUME] * vp->reg.amplitude / 127;
778 LIMITVALUE(main_vol, 0, 127);
779
780 vol = voltab1[main_vol] + voltab2[vp->velocity];
781 vol = (vol * 8) / 3;
782 vol += vp->reg.attenuation;
783 vol += ((0x100 - vol) * expressiontab[expression_vol])/128;
784 }
785
786 master_vol = port->chset.gs_master_volume;
787 LIMITVALUE(master_vol, 0, 127);
788 vol += snd_sf_vol_table[master_vol];
789 vol += port->volume_atten;
790
791 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
792 if (chan->private) {
793 struct snd_emux_effect_table *fx = chan->private;
794 vol += fx->val[EMUX_FX_ATTEN];
795 }
796 #endif
797
798 LIMITVALUE(vol, 0, 255);
799 if (vp->avol == vol)
800 return 0; /* value unchanged */
801
802 vp->avol = vol;
803 if (!SF_IS_DRUM_BANK(get_bank(port, chan))
804 && LO_BYTE(vp->reg.parm.volatkhld) < 0x7d) {
805 int atten;
806 if (vp->velocity < 70)
807 atten = 70;
808 else
809 atten = vp->velocity;
810 vp->acutoff = (atten * vp->reg.parm.cutoff + 0xa0) >> 7;
811 } else {
812 vp->acutoff = vp->reg.parm.cutoff;
813 }
814
815 return 1; /* value changed */
816 }
817
818 /*
819 * calculate pitch offset
820 *
821 * 0xE000 is no pitch offset at 44100Hz sample.
822 * Every 4096 is one octave.
823 */
824
825 static int
826 calc_pitch(struct snd_emux_voice *vp)
827 {
828 struct snd_midi_channel *chan = vp->chan;
829 int offset;
830
831 /* calculate offset */
832 if (vp->reg.fixkey >= 0) {
833 offset = (vp->reg.fixkey - vp->reg.root) * 4096 / 12;
834 } else {
835 offset = (vp->note - vp->reg.root) * 4096 / 12;
836 }
837 offset = (offset * vp->reg.scaleTuning) / 100;
838 offset += vp->reg.tune * 4096 / 1200;
839 if (chan->midi_pitchbend != 0) {
840 /* (128 * 8192: 1 semitone) ==> (4096: 12 semitones) */
841 offset += chan->midi_pitchbend * chan->gm_rpn_pitch_bend_range / 3072;
842 }
843
844 /* tuning via RPN:
845 * coarse = -8192 to 8192 (100 cent per 128)
846 * fine = -8192 to 8192 (max=100cent)
847 */
848 /* 4096 = 1200 cents in emu8000 parameter */
849 offset += chan->gm_rpn_coarse_tuning * 4096 / (12 * 128);
850 offset += chan->gm_rpn_fine_tuning / 24;
851
852 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
853 /* add initial pitch correction */
854 if (chan->private) {
855 struct snd_emux_effect_table *fx = chan->private;
856 if (fx->flag[EMUX_FX_INIT_PITCH])
857 offset += fx->val[EMUX_FX_INIT_PITCH];
858 }
859 #endif
860
861 /* 0xe000: root pitch */
862 offset += 0xe000 + vp->reg.rate_offset;
863 offset += vp->emu->pitch_shift;
864 LIMITVALUE(offset, 0, 0xffff);
865 if (offset == vp->apitch)
866 return 0; /* unchanged */
867 vp->apitch = offset;
868 return 1; /* value changed */
869 }
870
871 /*
872 * Get the bank number assigned to the channel
873 */
874 static int
875 get_bank(struct snd_emux_port *port, struct snd_midi_channel *chan)
876 {
877 int val;
878
879 switch (port->chset.midi_mode) {
880 case SNDRV_MIDI_MODE_XG:
881 val = chan->control[MIDI_CTL_MSB_BANK];
882 if (val == 127)
883 return 128; /* return drum bank */
884 return chan->control[MIDI_CTL_LSB_BANK];
885
886 case SNDRV_MIDI_MODE_GS:
887 if (chan->drum_channel)
888 return 128;
889 /* ignore LSB (bank map) */
890 return chan->control[MIDI_CTL_MSB_BANK];
891
892 default:
893 if (chan->drum_channel)
894 return 128;
895 return chan->control[MIDI_CTL_MSB_BANK];
896 }
897 }
898
899
900 /* Look for the zones matching with the given note and velocity.
901 * The resultant zones are stored on table.
902 */
903 static int
904 get_zone(struct snd_emux *emu, struct snd_emux_port *port,
905 int *notep, int vel, struct snd_midi_channel *chan,
906 struct snd_sf_zone **table)
907 {
908 int preset, bank, def_preset, def_bank;
909
910 bank = get_bank(port, chan);
911 preset = chan->midi_program;
912
913 if (SF_IS_DRUM_BANK(bank)) {
914 def_preset = port->ctrls[EMUX_MD_DEF_DRUM];
915 def_bank = bank;
916 } else {
917 def_preset = preset;
918 def_bank = port->ctrls[EMUX_MD_DEF_BANK];
919 }
920
921 return snd_soundfont_search_zone(emu->sflist, notep, vel, preset, bank,
922 def_preset, def_bank,
923 table, SNDRV_EMUX_MAX_MULTI_VOICES);
924 }
925
926 /*
927 */
928 void
929 snd_emux_init_voices(struct snd_emux *emu)
930 {
931 struct snd_emux_voice *vp;
932 int i;
933 unsigned long flags;
934
935 spin_lock_irqsave(&emu->voice_lock, flags);
936 for (i = 0; i < emu->max_voices; i++) {
937 vp = &emu->voices[i];
938 vp->ch = -1; /* not used */
939 vp->state = SNDRV_EMUX_ST_OFF;
940 vp->chan = NULL;
941 vp->port = NULL;
942 vp->time = 0;
943 vp->emu = emu;
944 vp->hw = emu->hw;
945 }
946 spin_unlock_irqrestore(&emu->voice_lock, flags);
947 }
948
949 /*
950 */
951 void snd_emux_lock_voice(struct snd_emux *emu, int voice)
952 {
953 unsigned long flags;
954
955 spin_lock_irqsave(&emu->voice_lock, flags);
956 if (emu->voices[voice].state == SNDRV_EMUX_ST_OFF)
957 emu->voices[voice].state = SNDRV_EMUX_ST_LOCKED;
958 else
959 snd_printk(KERN_WARNING
960 "invalid voice for lock %d (state = %x)\n",
961 voice, emu->voices[voice].state);
962 spin_unlock_irqrestore(&emu->voice_lock, flags);
963 }
964
965 EXPORT_SYMBOL(snd_emux_lock_voice);
966
967 /*
968 */
969 void snd_emux_unlock_voice(struct snd_emux *emu, int voice)
970 {
971 unsigned long flags;
972
973 spin_lock_irqsave(&emu->voice_lock, flags);
974 if (emu->voices[voice].state == SNDRV_EMUX_ST_LOCKED)
975 emu->voices[voice].state = SNDRV_EMUX_ST_OFF;
976 else
977 snd_printk(KERN_WARNING
978 "invalid voice for unlock %d (state = %x)\n",
979 voice, emu->voices[voice].state);
980 spin_unlock_irqrestore(&emu->voice_lock, flags);
981 }
982
983 EXPORT_SYMBOL(snd_emux_unlock_voice);
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