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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / sound / drivers / opl3 / opl3_midi.c
blobcebcb8b78acb8af1e1066f919bb5124b83b6c821
1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * Midi synth routines for OPL2/OPL3/OPL4 FM
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #undef DEBUG_ALLOC
23 #undef DEBUG_MIDI
24
25 #include "opl3_voice.h"
26 #include <sound/asoundef.h>
27
28 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
29
30 extern int use_internal_drums;
31
32 /*
33 * The next table looks magical, but it certainly is not. Its values have
34 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
35 * for i=0. This log-table converts a linear volume-scaling (0..127) to a
36 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume
37 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
38 * volume -8 it was implemented as a table because it is only 128 bytes and
39 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>)
40 */
41
42 static char opl3_volume_table[128] =
43 {
44 -63, -48, -40, -35, -32, -29, -27, -26,
45 -24, -23, -21, -20, -19, -18, -18, -17,
46 -16, -15, -15, -14, -13, -13, -12, -12,
47 -11, -11, -10, -10, -10, -9, -9, -8,
48 -8, -8, -7, -7, -7, -6, -6, -6,
49 -5, -5, -5, -5, -4, -4, -4, -4,
50 -3, -3, -3, -3, -2, -2, -2, -2,
51 -2, -1, -1, -1, -1, 0, 0, 0,
52 0, 0, 0, 1, 1, 1, 1, 1,
53 1, 2, 2, 2, 2, 2, 2, 2,
54 3, 3, 3, 3, 3, 3, 3, 4,
55 4, 4, 4, 4, 4, 4, 4, 5,
56 5, 5, 5, 5, 5, 5, 5, 5,
57 6, 6, 6, 6, 6, 6, 6, 6,
58 6, 7, 7, 7, 7, 7, 7, 7,
59 7, 7, 7, 8, 8, 8, 8, 8
60 };
61
62 void snd_opl3_calc_volume(unsigned char *volbyte, int vel,
63 struct snd_midi_channel *chan)
64 {
65 int oldvol, newvol, n;
66 int volume;
67
68 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127);
69 if (volume > 127)
70 volume = 127;
71
72 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK);
73
74 newvol = opl3_volume_table[volume] + oldvol;
75 if (newvol > OPL3_TOTAL_LEVEL_MASK)
76 newvol = OPL3_TOTAL_LEVEL_MASK;
77 else if (newvol < 0)
78 newvol = 0;
79
80 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK);
81
82 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK);
83 }
84
85 /*
86 * Converts the note frequency to block and fnum values for the FM chip
87 */
88 static short opl3_note_table[16] =
89 {
90 305, 323, /* for pitch bending, -2 semitones */
91 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647,
92 686, 726 /* for pitch bending, +2 semitones */
93 };
94
95 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum,
96 int note, struct snd_midi_channel *chan)
97 {
98 int block = ((note / 12) & 0x07) - 1;
99 int idx = (note % 12) + 2;
100 int freq;
101
102 if (chan->midi_pitchbend) {
103 int pitchbend = chan->midi_pitchbend;
104 int segment;
105
106 if (pitchbend > 0x1FFF)
107 pitchbend = 0x1FFF;
108
109 segment = pitchbend / 0x1000;
110 freq = opl3_note_table[idx+segment];
111 freq += ((opl3_note_table[idx+segment+1] - freq) *
112 (pitchbend % 0x1000)) / 0x1000;
113 } else {
114 freq = opl3_note_table[idx];
115 }
116
117 *fnum = (unsigned char) freq;
118 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) |
119 ((block << 2) & OPL3_BLOCKNUM_MASK);
120 }
121
122
123 #ifdef DEBUG_ALLOC
124 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) {
125 int i;
126 char *str = "x.24";
127
128 printk("time %.5i: %s [%.2i]: ", opl3->use_time, s, voice);
129 for (i = 0; i < opl3->max_voices; i++)
130 printk("%c", *(str + opl3->voices[i].state + 1));
131 printk("\n");
132 }
133 #endif
134
135 /*
136 * Get a FM voice (channel) to play a note on.
137 */
138 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op,
139 struct snd_midi_channel *chan) {
140 int chan_4op_1; /* first voice for 4op instrument */
141 int chan_4op_2; /* second voice for 4op instrument */
142
143 struct snd_opl3_voice *vp, *vp2;
144 unsigned int voice_time;
145 int i;
146
147 #ifdef DEBUG_ALLOC
148 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" };
149 #endif
150
151 /* This is our "allocation cost" table */
152 enum {
153 FREE = 0, CHEAP, EXPENSIVE, END
154 };
155
156 /* Keeps track of what we are finding */
157 struct best {
158 unsigned int time;
159 int voice;
160 } best[END];
161 struct best *bp;
162
163 for (i = 0; i < END; i++) {
164 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */;
165 best[i].voice = -1;
166 }
167
168 /* Look through all the channels for the most suitable. */
169 for (i = 0; i < opl3->max_voices; i++) {
170 vp = &opl3->voices[i];
171
172 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL)
173 /* skip unavailable channels, allocated by
174 drum voices or by bounded 4op voices) */
175 continue;
176
177 voice_time = vp->time;
178 bp = best;
179
180 chan_4op_1 = ((i < 3) || (i > 8 && i < 12));
181 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15));
182 if (instr_4op) {
183 /* allocate 4op voice */
184 /* skip channels unavailable to 4op instrument */
185 if (!chan_4op_1)
186 continue;
187
188 if (vp->state)
189 /* kill one voice, CHEAP */
190 bp++;
191 /* get state of bounded 2op channel
192 to be allocated for 4op instrument */
193 vp2 = &opl3->voices[i + 3];
194 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) {
195 /* kill two voices, EXPENSIVE */
196 bp++;
197 voice_time = (voice_time > vp->time) ?
198 voice_time : vp->time;
199 }
200 } else {
201 /* allocate 2op voice */
202 if ((chan_4op_1) || (chan_4op_2))
203 /* use bounded channels for 2op, CHEAP */
204 bp++;
205 else if (vp->state)
206 /* kill one voice on 2op channel, CHEAP */
207 bp++;
208 /* raise kill cost to EXPENSIVE for all channels */
209 if (vp->state)
210 bp++;
211 }
212 if (voice_time < bp->time) {
213 bp->time = voice_time;
214 bp->voice = i;
215 }
216 }
217
218 for (i = 0; i < END; i++) {
219 if (best[i].voice >= 0) {
220 #ifdef DEBUG_ALLOC
221 printk("%s %iop allocation on voice %i\n",
222 alloc_type[i], instr_4op ? 4 : 2,
223 best[i].voice);
224 #endif
225 return best[i].voice;
226 }
227 }
228 /* not found */
229 return -1;
230 }
231
232 /* ------------------------------ */
233
234 /*
235 * System timer interrupt function
236 */
237 void snd_opl3_timer_func(unsigned long data)
238 {
239
240 struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
241 unsigned long flags;
242 int again = 0;
243 int i;
244
245 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
246 for (i = 0; i < opl3->max_voices; i++) {
247 struct snd_opl3_voice *vp = &opl3->voices[i];
248 if (vp->state > 0 && vp->note_off_check) {
249 if (vp->note_off == jiffies)
250 snd_opl3_note_off(opl3, vp->note, 0, vp->chan);
251 else
252 again++;
253 }
254 }
255 if (again) {
256 opl3->tlist.expires = jiffies + 1; /* invoke again */
257 add_timer(&opl3->tlist);
258 } else {
259 opl3->sys_timer_status = 0;
260 }
261 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
262 }
263
264 /*
265 * Start system timer
266 */
267 static void snd_opl3_start_timer(struct snd_opl3 *opl3)
268 {
269 unsigned long flags;
270 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
271 if (! opl3->sys_timer_status) {
272 opl3->tlist.expires = jiffies + 1;
273 add_timer(&opl3->tlist);
274 opl3->sys_timer_status = 1;
275 }
276 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
277 }
278
279 /* ------------------------------ */
280
281
282 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = {
283 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14
284 };
285
286 /*
287 * Start a note.
288 */
289 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
290 {
291 struct snd_opl3 *opl3;
292 int instr_4op;
293
294 int voice;
295 struct snd_opl3_voice *vp, *vp2;
296 unsigned short connect_mask;
297 unsigned char connection;
298 unsigned char vol_op[4];
299
300 int extra_prg = 0;
301
302 unsigned short reg_side;
303 unsigned char op_offset;
304 unsigned char voice_offset;
305 unsigned short opl3_reg;
306 unsigned char reg_val;
307 unsigned char prg, bank;
308
309 int key = note;
310 unsigned char fnum, blocknum;
311 int i;
312
313 struct fm_patch *patch;
314 struct fm_instrument *fm;
315 unsigned long flags;
316
317 opl3 = p;
318
319 #ifdef DEBUG_MIDI
320 snd_printk("Note on, ch %i, inst %i, note %i, vel %i\n",
321 chan->number, chan->midi_program, note, vel);
322 #endif
323
324 /* in SYNTH mode, application takes care of voices */
325 /* in SEQ mode, drum voice numbers are notes on drum channel */
326 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
327 if (chan->drum_channel) {
328 /* percussion instruments are located in bank 128 */
329 bank = 128;
330 prg = note;
331 } else {
332 bank = chan->gm_bank_select;
333 prg = chan->midi_program;
334 }
335 } else {
336 /* Prepare for OSS mode */
337 if (chan->number >= MAX_OPL3_VOICES)
338 return;
339
340 /* OSS instruments are located in bank 127 */
341 bank = 127;
342 prg = chan->midi_program;
343 }
344
345 spin_lock_irqsave(&opl3->voice_lock, flags);
346
347 if (use_internal_drums) {
348 snd_opl3_drum_switch(opl3, note, vel, 1, chan);
349 spin_unlock_irqrestore(&opl3->voice_lock, flags);
350 return;
351 }
352
353 __extra_prg:
354 patch = snd_opl3_find_patch(opl3, prg, bank, 0);
355 if (!patch) {
356 spin_unlock_irqrestore(&opl3->voice_lock, flags);
357 return;
358 }
359
360 fm = &patch->inst;
361 switch (patch->type) {
362 case FM_PATCH_OPL2:
363 instr_4op = 0;
364 break;
365 case FM_PATCH_OPL3:
366 if (opl3->hardware >= OPL3_HW_OPL3) {
367 instr_4op = 1;
368 break;
369 }
370 default:
371 spin_unlock_irqrestore(&opl3->voice_lock, flags);
372 return;
373 }
374 #ifdef DEBUG_MIDI
375 snd_printk(" --> OPL%i instrument: %s\n",
376 instr_4op ? 3 : 2, patch->name);
377 #endif
378 /* in SYNTH mode, application takes care of voices */
379 /* in SEQ mode, allocate voice on free OPL3 channel */
380 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
381 voice = opl3_get_voice(opl3, instr_4op, chan);
382 } else {
383 /* remap OSS voice */
384 voice = snd_opl3_oss_map[chan->number];
385 }
386
387 if (voice < MAX_OPL2_VOICES) {
388 /* Left register block for voices 0 .. 8 */
389 reg_side = OPL3_LEFT;
390 voice_offset = voice;
391 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07;
392 } else {
393 /* Right register block for voices 9 .. 17 */
394 reg_side = OPL3_RIGHT;
395 voice_offset = voice - MAX_OPL2_VOICES;
396 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38;
397 }
398
399 /* kill voice on channel */
400 vp = &opl3->voices[voice];
401 if (vp->state > 0) {
402 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
403 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
404 opl3->command(opl3, opl3_reg, reg_val);
405 }
406 if (instr_4op) {
407 vp2 = &opl3->voices[voice + 3];
408 if (vp->state > 0) {
409 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
410 voice_offset + 3);
411 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
412 opl3->command(opl3, opl3_reg, reg_val);
413 }
414 }
415
416 /* set connection register */
417 if (instr_4op) {
418 if ((opl3->connection_reg ^ connect_mask) & connect_mask) {
419 opl3->connection_reg |= connect_mask;
420 /* set connection bit */
421 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
422 opl3->command(opl3, opl3_reg, opl3->connection_reg);
423 }
424 } else {
425 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) {
426 opl3->connection_reg &= ~connect_mask;
427 /* clear connection bit */
428 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
429 opl3->command(opl3, opl3_reg, opl3->connection_reg);
430 }
431 }
432
433 #ifdef DEBUG_MIDI
434 snd_printk(" --> setting OPL3 connection: 0x%x\n",
435 opl3->connection_reg);
436 #endif
437 /*
438 * calculate volume depending on connection
439 * between FM operators (see include/opl3.h)
440 */
441 for (i = 0; i < (instr_4op ? 4 : 2); i++)
442 vol_op[i] = fm->op[i].ksl_level;
443
444 connection = fm->feedback_connection[0] & 0x01;
445 if (instr_4op) {
446 connection <<= 1;
447 connection |= fm->feedback_connection[1] & 0x01;
448
449 snd_opl3_calc_volume(&vol_op[3], vel, chan);
450 switch (connection) {
451 case 0x03:
452 snd_opl3_calc_volume(&vol_op[2], vel, chan);
453 /* fallthru */
454 case 0x02:
455 snd_opl3_calc_volume(&vol_op[0], vel, chan);
456 break;
457 case 0x01:
458 snd_opl3_calc_volume(&vol_op[1], vel, chan);
459 }
460 } else {
461 snd_opl3_calc_volume(&vol_op[1], vel, chan);
462 if (connection)
463 snd_opl3_calc_volume(&vol_op[0], vel, chan);
464 }
465
466 /* Program the FM voice characteristics */
467 for (i = 0; i < (instr_4op ? 4 : 2); i++) {
468 #ifdef DEBUG_MIDI
469 snd_printk(" --> programming operator %i\n", i);
470 #endif
471 op_offset = snd_opl3_regmap[voice_offset][i];
472
473 /* Set OPL3 AM_VIB register of requested voice/operator */
474 reg_val = fm->op[i].am_vib;
475 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
476 opl3->command(opl3, opl3_reg, reg_val);
477
478 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
479 reg_val = vol_op[i];
480 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
481 opl3->command(opl3, opl3_reg, reg_val);
482
483 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
484 reg_val = fm->op[i].attack_decay;
485 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
486 opl3->command(opl3, opl3_reg, reg_val);
487
488 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
489 reg_val = fm->op[i].sustain_release;
490 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
491 opl3->command(opl3, opl3_reg, reg_val);
492
493 /* Select waveform */
494 reg_val = fm->op[i].wave_select;
495 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
496 opl3->command(opl3, opl3_reg, reg_val);
497 }
498
499 /* Set operator feedback and 2op inter-operator connection */
500 reg_val = fm->feedback_connection[0];
501 /* Set output voice connection */
502 reg_val |= OPL3_STEREO_BITS;
503 if (chan->gm_pan < 43)
504 reg_val &= ~OPL3_VOICE_TO_RIGHT;
505 if (chan->gm_pan > 85)
506 reg_val &= ~OPL3_VOICE_TO_LEFT;
507 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
508 opl3->command(opl3, opl3_reg, reg_val);
509
510 if (instr_4op) {
511 /* Set 4op inter-operator connection */
512 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT;
513 /* Set output voice connection */
514 reg_val |= OPL3_STEREO_BITS;
515 if (chan->gm_pan < 43)
516 reg_val &= ~OPL3_VOICE_TO_RIGHT;
517 if (chan->gm_pan > 85)
518 reg_val &= ~OPL3_VOICE_TO_LEFT;
519 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION +
520 voice_offset + 3);
521 opl3->command(opl3, opl3_reg, reg_val);
522 }
523
524 /*
525 * Special treatment of percussion notes for fm:
526 * Requested pitch is really program, and pitch for
527 * device is whatever was specified in the patch library.
528 */
529 if (fm->fix_key)
530 note = fm->fix_key;
531 /*
532 * use transpose if defined in patch library
533 */
534 if (fm->trnsps)
535 note += (fm->trnsps - 64);
536
537 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan);
538
539 /* Set OPL3 FNUM_LOW register of requested voice */
540 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
541 opl3->command(opl3, opl3_reg, fnum);
542
543 opl3->voices[voice].keyon_reg = blocknum;
544
545 /* Set output sound flag */
546 blocknum |= OPL3_KEYON_BIT;
547
548 #ifdef DEBUG_MIDI
549 snd_printk(" --> trigger voice %i\n", voice);
550 #endif
551 /* Set OPL3 KEYON_BLOCK register of requested voice */
552 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
553 opl3->command(opl3, opl3_reg, blocknum);
554
555 /* kill note after fixed duration (in centiseconds) */
556 if (fm->fix_dur) {
557 opl3->voices[voice].note_off = jiffies +
558 (fm->fix_dur * HZ) / 100;
559 snd_opl3_start_timer(opl3);
560 opl3->voices[voice].note_off_check = 1;
561 } else
562 opl3->voices[voice].note_off_check = 0;
563
564 /* get extra pgm, but avoid possible loops */
565 extra_prg = (extra_prg) ? 0 : fm->modes;
566
567 /* do the bookkeeping */
568 vp->time = opl3->use_time++;
569 vp->note = key;
570 vp->chan = chan;
571
572 if (instr_4op) {
573 vp->state = SNDRV_OPL3_ST_ON_4OP;
574
575 vp2 = &opl3->voices[voice + 3];
576 vp2->time = opl3->use_time++;
577 vp2->note = key;
578 vp2->chan = chan;
579 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL;
580 } else {
581 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
582 /* 4op killed by 2op, release bounded voice */
583 vp2 = &opl3->voices[voice + 3];
584 vp2->time = opl3->use_time++;
585 vp2->state = SNDRV_OPL3_ST_OFF;
586 }
587 vp->state = SNDRV_OPL3_ST_ON_2OP;
588 }
589
590 #ifdef DEBUG_ALLOC
591 debug_alloc(opl3, "note on ", voice);
592 #endif
593
594 /* allocate extra program if specified in patch library */
595 if (extra_prg) {
596 if (extra_prg > 128) {
597 bank = 128;
598 /* percussions start at 35 */
599 prg = extra_prg - 128 + 35 - 1;
600 } else {
601 bank = 0;
602 prg = extra_prg - 1;
603 }
604 #ifdef DEBUG_MIDI
605 snd_printk(" *** allocating extra program\n");
606 #endif
607 goto __extra_prg;
608 }
609 spin_unlock_irqrestore(&opl3->voice_lock, flags);
610 }
611
612 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice)
613 {
614 unsigned short reg_side;
615 unsigned char voice_offset;
616 unsigned short opl3_reg;
617
618 struct snd_opl3_voice *vp, *vp2;
619
620 snd_assert(voice < MAX_OPL3_VOICES, return);
621
622 vp = &opl3->voices[voice];
623 if (voice < MAX_OPL2_VOICES) {
624 /* Left register block for voices 0 .. 8 */
625 reg_side = OPL3_LEFT;
626 voice_offset = voice;
627 } else {
628 /* Right register block for voices 9 .. 17 */
629 reg_side = OPL3_RIGHT;
630 voice_offset = voice - MAX_OPL2_VOICES;
631 }
632
633 /* kill voice */
634 #ifdef DEBUG_MIDI
635 snd_printk(" --> kill voice %i\n", voice);
636 #endif
637 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
638 /* clear Key ON bit */
639 opl3->command(opl3, opl3_reg, vp->keyon_reg);
640
641 /* do the bookkeeping */
642 vp->time = opl3->use_time++;
643
644 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
645 vp2 = &opl3->voices[voice + 3];
646
647 vp2->time = opl3->use_time++;
648 vp2->state = SNDRV_OPL3_ST_OFF;
649 }
650 vp->state = SNDRV_OPL3_ST_OFF;
651 #ifdef DEBUG_ALLOC
652 debug_alloc(opl3, "note off", voice);
653 #endif
654
655 }
656
657 /*
658 * Release a note in response to a midi note off.
659 */
660 void snd_opl3_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
661 {
662 struct snd_opl3 *opl3;
663
664 int voice;
665 struct snd_opl3_voice *vp;
666
667 unsigned long flags;
668
669 opl3 = p;
670
671 #ifdef DEBUG_MIDI
672 snd_printk("Note off, ch %i, inst %i, note %i\n",
673 chan->number, chan->midi_program, note);
674 #endif
675
676 spin_lock_irqsave(&opl3->voice_lock, flags);
677
678 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
679 if (chan->drum_channel && use_internal_drums) {
680 snd_opl3_drum_switch(opl3, note, vel, 0, chan);
681 spin_unlock_irqrestore(&opl3->voice_lock, flags);
682 return;
683 }
684 /* this loop will hopefully kill all extra voices, because
685 they are grouped by the same channel and note values */
686 for (voice = 0; voice < opl3->max_voices; voice++) {
687 vp = &opl3->voices[voice];
688 if (vp->state > 0 && vp->chan == chan && vp->note == note) {
689 snd_opl3_kill_voice(opl3, voice);
690 }
691 }
692 } else {
693 /* remap OSS voices */
694 if (chan->number < MAX_OPL3_VOICES) {
695 voice = snd_opl3_oss_map[chan->number];
696 snd_opl3_kill_voice(opl3, voice);
697 }
698 }
699 spin_unlock_irqrestore(&opl3->voice_lock, flags);
700 }
701
702 /*
703 * key pressure change
704 */
705 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
706 {
707 struct snd_opl3 *opl3;
708
709 opl3 = p;
710 #ifdef DEBUG_MIDI
711 snd_printk("Key pressure, ch#: %i, inst#: %i\n",
712 chan->number, chan->midi_program);
713 #endif
714 }
715
716 /*
717 * terminate note
718 */
719 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan)
720 {
721 struct snd_opl3 *opl3;
722
723 opl3 = p;
724 #ifdef DEBUG_MIDI
725 snd_printk("Terminate note, ch#: %i, inst#: %i\n",
726 chan->number, chan->midi_program);
727 #endif
728 }
729
730 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice)
731 {
732 unsigned short reg_side;
733 unsigned char voice_offset;
734 unsigned short opl3_reg;
735
736 unsigned char fnum, blocknum;
737
738 struct snd_opl3_voice *vp;
739
740 snd_assert(voice < MAX_OPL3_VOICES, return);
741
742 vp = &opl3->voices[voice];
743 if (vp->chan == NULL)
744 return; /* not allocated? */
745
746 if (voice < MAX_OPL2_VOICES) {
747 /* Left register block for voices 0 .. 8 */
748 reg_side = OPL3_LEFT;
749 voice_offset = voice;
750 } else {
751 /* Right register block for voices 9 .. 17 */
752 reg_side = OPL3_RIGHT;
753 voice_offset = voice - MAX_OPL2_VOICES;
754 }
755
756 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan);
757
758 /* Set OPL3 FNUM_LOW register of requested voice */
759 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
760 opl3->command(opl3, opl3_reg, fnum);
761
762 vp->keyon_reg = blocknum;
763
764 /* Set output sound flag */
765 blocknum |= OPL3_KEYON_BIT;
766
767 /* Set OPL3 KEYON_BLOCK register of requested voice */
768 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
769 opl3->command(opl3, opl3_reg, blocknum);
770
771 vp->time = opl3->use_time++;
772 }
773
774 /*
775 * Update voice pitch controller
776 */
777 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan)
778 {
779 int voice;
780 struct snd_opl3_voice *vp;
781
782 unsigned long flags;
783
784 spin_lock_irqsave(&opl3->voice_lock, flags);
785
786 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
787 for (voice = 0; voice < opl3->max_voices; voice++) {
788 vp = &opl3->voices[voice];
789 if (vp->state > 0 && vp->chan == chan) {
790 snd_opl3_update_pitch(opl3, voice);
791 }
792 }
793 } else {
794 /* remap OSS voices */
795 if (chan->number < MAX_OPL3_VOICES) {
796 voice = snd_opl3_oss_map[chan->number];
797 snd_opl3_update_pitch(opl3, voice);
798 }
799 }
800 spin_unlock_irqrestore(&opl3->voice_lock, flags);
801 }
802
803 /*
804 * Deal with a controller type event. This includes all types of
805 * control events, not just the midi controllers
806 */
807 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan)
808 {
809 struct snd_opl3 *opl3;
810
811 opl3 = p;
812 #ifdef DEBUG_MIDI
813 snd_printk("Controller, TYPE = %i, ch#: %i, inst#: %i\n",
814 type, chan->number, chan->midi_program);
815 #endif
816
817 switch (type) {
818 case MIDI_CTL_MSB_MODWHEEL:
819 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63)
820 opl3->drum_reg |= OPL3_VIBRATO_DEPTH;
821 else
822 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH;
823 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
824 opl3->drum_reg);
825 break;
826 case MIDI_CTL_E2_TREMOLO_DEPTH:
827 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63)
828 opl3->drum_reg |= OPL3_TREMOLO_DEPTH;
829 else
830 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH;
831 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
832 opl3->drum_reg);
833 break;
834 case MIDI_CTL_PITCHBEND:
835 snd_opl3_pitch_ctrl(opl3, chan);
836 break;
837 }
838 }
839
840 /*
841 * NRPN events
842 */
843 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan,
844 struct snd_midi_channel_set *chset)
845 {
846 struct snd_opl3 *opl3;
847
848 opl3 = p;
849 #ifdef DEBUG_MIDI
850 snd_printk("NRPN, ch#: %i, inst#: %i\n",
851 chan->number, chan->midi_program);
852 #endif
853 }
854
855 /*
856 * receive sysex
857 */
858 void snd_opl3_sysex(void *p, unsigned char *buf, int len,
859 int parsed, struct snd_midi_channel_set *chset)
860 {
861 struct snd_opl3 *opl3;
862
863 opl3 = p;
864 #ifdef DEBUG_MIDI
865 snd_printk("SYSEX\n");
866 #endif
867 }
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