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ALSA: line6: Clamp values correctly
[deliverable/linux.git] / sound / drivers / opl3 / opl3_midi.c
CommitLineData
1da177e4
LT		 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
28extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
29
a67ff6a5 30extern bool use_internal_drums;
1da177e4 31
8dce39b8
KH		 32static void snd_opl3_note_off_unsafe(void *p, int note, int vel,
33 struct snd_midi_channel *chan);
1da177e4
LT		 34/*
35 * The next table looks magical, but it certainly is not. Its values have
36 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
37 * for i=0. This log-table converts a linear volume-scaling (0..127) to a
38 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume
39 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
40 * volume -8 it was implemented as a table because it is only 128 bytes and
41 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>)
42 */
43
44static char opl3_volume_table[128] =
45{
46 -63, -48, -40, -35, -32, -29, -27, -26,
47 -24, -23, -21, -20, -19, -18, -18, -17,
48 -16, -15, -15, -14, -13, -13, -12, -12,
49 -11, -11, -10, -10, -10, -9, -9, -8,
50 -8, -8, -7, -7, -7, -6, -6, -6,
51 -5, -5, -5, -5, -4, -4, -4, -4,
52 -3, -3, -3, -3, -2, -2, -2, -2,
53 -2, -1, -1, -1, -1, 0, 0, 0,
54 0, 0, 0, 1, 1, 1, 1, 1,
55 1, 2, 2, 2, 2, 2, 2, 2,
56 3, 3, 3, 3, 3, 3, 3, 4,
57 4, 4, 4, 4, 4, 4, 4, 5,
58 5, 5, 5, 5, 5, 5, 5, 5,
59 6, 6, 6, 6, 6, 6, 6, 6,
60 6, 7, 7, 7, 7, 7, 7, 7,
61 7, 7, 7, 8, 8, 8, 8, 8
62};
63
64void snd_opl3_calc_volume(unsigned char *volbyte, int vel,
5b1646a8 65 struct snd_midi_channel *chan)
1da177e4
LT		 66{
67 int oldvol, newvol, n;
68 int volume;
69
70 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127);
71 if (volume > 127)
72 volume = 127;
73
74 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK);
75
76 newvol = opl3_volume_table[volume] + oldvol;
77 if (newvol > OPL3_TOTAL_LEVEL_MASK)
78 newvol = OPL3_TOTAL_LEVEL_MASK;
79 else if (newvol < 0)
80 newvol = 0;
81
82 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK);
83
84 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK);
85}
86
87/*
88 * Converts the note frequency to block and fnum values for the FM chip
89 */
90static short opl3_note_table[16] =
91{
92 305, 323, /* for pitch bending, -2 semitones */
93 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647,
94 686, 726 /* for pitch bending, +2 semitones */
95};
96
97static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum,
5b1646a8 98 int note, struct snd_midi_channel *chan)
1da177e4
LT		 99{
100 int block = ((note / 12) & 0x07) - 1;
101 int idx = (note % 12) + 2;
102 int freq;
103
104 if (chan->midi_pitchbend) {
105 int pitchbend = chan->midi_pitchbend;
106 int segment;
107
108 if (pitchbend > 0x1FFF)
109 pitchbend = 0x1FFF;
110
111 segment = pitchbend / 0x1000;
112 freq = opl3_note_table[idx+segment];
113 freq += ((opl3_note_table[idx+segment+1] - freq) *
114 (pitchbend % 0x1000)) / 0x1000;
115 } else {
116 freq = opl3_note_table[idx];
117 }
118
119 *fnum = (unsigned char) freq;
120 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) |
121 ((block << 2) & OPL3_BLOCKNUM_MASK);
122}
123
124
125#ifdef DEBUG_ALLOC
5b1646a8 126static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) {
1da177e4
LT		 127 int i;
128 char *str = "x.24";
129
45203832 130 printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice);
1da177e4
LT		 131 for (i = 0; i < opl3->max_voices; i++)
132 printk("%c", *(str + opl3->voices[i].state + 1));
133 printk("\n");
134}
135#endif
136
137/*
138 * Get a FM voice (channel) to play a note on.
139 */
5b1646a8
TI		 140static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op,
141 struct snd_midi_channel *chan) {
1da177e4
LT		 142 int chan_4op_1; /* first voice for 4op instrument */
143 int chan_4op_2; /* second voice for 4op instrument */
144
5b1646a8 145 struct snd_opl3_voice *vp, *vp2;
1da177e4
LT		 146 unsigned int voice_time;
147 int i;
148
149#ifdef DEBUG_ALLOC
150 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" };
151#endif
152
153 /* This is our "allocation cost" table */
154 enum {
155 FREE = 0, CHEAP, EXPENSIVE, END
156 };
157
158 /* Keeps track of what we are finding */
159 struct best {
160 unsigned int time;
161 int voice;
162 } best[END];
163 struct best *bp;
164
165 for (i = 0; i < END; i++) {
395d9dd5 166 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */
1da177e4
LT		 167 best[i].voice = -1;
168 }
169
170 /* Look through all the channels for the most suitable. */
171 for (i = 0; i < opl3->max_voices; i++) {
172 vp = &opl3->voices[i];
173
174 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL)
175 /* skip unavailable channels, allocated by
176 drum voices or by bounded 4op voices) */
177 continue;
178
179 voice_time = vp->time;
180 bp = best;
181
182 chan_4op_1 = ((i < 3) || (i > 8 && i < 12));
183 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15));
184 if (instr_4op) {
185 /* allocate 4op voice */
186 /* skip channels unavailable to 4op instrument */
187 if (!chan_4op_1)
188 continue;
189
190 if (vp->state)
191 /* kill one voice, CHEAP */
192 bp++;
193 /* get state of bounded 2op channel
194 to be allocated for 4op instrument */
195 vp2 = &opl3->voices[i + 3];
196 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) {
197 /* kill two voices, EXPENSIVE */
198 bp++;
199 voice_time = (voice_time > vp->time) ?
200 voice_time : vp->time;
201 }
202 } else {
203 /* allocate 2op voice */
204 if ((chan_4op_1) || (chan_4op_2))
205 /* use bounded channels for 2op, CHEAP */
206 bp++;
207 else if (vp->state)
208 /* kill one voice on 2op channel, CHEAP */
209 bp++;
210 /* raise kill cost to EXPENSIVE for all channels */
211 if (vp->state)
212 bp++;
213 }
214 if (voice_time < bp->time) {
215 bp->time = voice_time;
216 bp->voice = i;
217 }
218 }
219
220 for (i = 0; i < END; i++) {
221 if (best[i].voice >= 0) {
222#ifdef DEBUG_ALLOC
45203832 223 printk(KERN_DEBUG "%s %iop allocation on voice %i\n",
1da177e4
LT		 224 alloc_type[i], instr_4op ? 4 : 2,
225 best[i].voice);
226#endif
227 return best[i].voice;
228 }
229 }
230 /* not found */
231 return -1;
232}
233
234/* ------------------------------ */
235
236/*
237 * System timer interrupt function
238 */
239void snd_opl3_timer_func(unsigned long data)
240{
241
5b1646a8 242 struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
b32425ac 243 unsigned long flags;
1da177e4
LT		 244 int again = 0;
245 int i;
246
8dce39b8 247 spin_lock_irqsave(&opl3->voice_lock, flags);
1da177e4 248 for (i = 0; i < opl3->max_voices; i++) {
5b1646a8 249 struct snd_opl3_voice *vp = &opl3->voices[i];
1da177e4
LT		 250 if (vp->state > 0 && vp->note_off_check) {
251 if (vp->note_off == jiffies)
8dce39b8
KH		 252 snd_opl3_note_off_unsafe(opl3, vp->note, 0,
253 vp->chan);
1da177e4
LT		 254 else
255 again++;
256 }
257 }
8dce39b8
KH		 258 spin_unlock_irqrestore(&opl3->voice_lock, flags);
259
260 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
f5d5f75f
TI		 261 if (again)
262 mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */
263 else
1da177e4 264 opl3->sys_timer_status = 0;
b32425ac 265 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
1da177e4
LT		 266}
267
268/*
269 * Start system timer
270 */
5b1646a8 271static void snd_opl3_start_timer(struct snd_opl3 *opl3)
1da177e4
LT		 272{
273 unsigned long flags;
274 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
275 if (! opl3->sys_timer_status) {
f5d5f75f 276 mod_timer(&opl3->tlist, jiffies + 1);
1da177e4
LT		 277 opl3->sys_timer_status = 1;
278 }
279 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
280}
281
282/* ------------------------------ */
283
284
285static int snd_opl3_oss_map[MAX_OPL3_VOICES] = {
286 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14
287};
288
289/*
290 * Start a note.
291 */
5b1646a8 292void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
1da177e4 293{
5b1646a8 294 struct snd_opl3 *opl3;
1da177e4
LT		 295 int instr_4op;
296
297 int voice;
5b1646a8 298 struct snd_opl3_voice *vp, *vp2;
1da177e4
LT		 299 unsigned short connect_mask;
300 unsigned char connection;
301 unsigned char vol_op[4];
302
303 int extra_prg = 0;
304
305 unsigned short reg_side;
306 unsigned char op_offset;
307 unsigned char voice_offset;
308 unsigned short opl3_reg;
309 unsigned char reg_val;
224a0332 310 unsigned char prg, bank;
1da177e4
LT		 311
312 int key = note;
313 unsigned char fnum, blocknum;
314 int i;
315
224a0332 316 struct fm_patch *patch;
5b1646a8 317 struct fm_instrument *fm;
1da177e4
LT		 318 unsigned long flags;
319
320 opl3 = p;
321
322#ifdef DEBUG_MIDI
45203832 323 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n",
1da177e4
LT		 324 chan->number, chan->midi_program, note, vel);
325#endif
1da177e4
LT		 326
327 /* in SYNTH mode, application takes care of voices */
328 /* in SEQ mode, drum voice numbers are notes on drum channel */
329 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
330 if (chan->drum_channel) {
331 /* percussion instruments are located in bank 128 */
224a0332
TI		 332 bank = 128;
333 prg = note;
1da177e4 334 } else {
224a0332
TI		 335 bank = chan->gm_bank_select;
336 prg = chan->midi_program;
1da177e4
LT		 337 }
338 } else {
339 /* Prepare for OSS mode */
340 if (chan->number >= MAX_OPL3_VOICES)
341 return;
342
343 /* OSS instruments are located in bank 127 */
224a0332
TI		 344 bank = 127;
345 prg = chan->midi_program;
1da177e4
LT		 346 }
347
348 spin_lock_irqsave(&opl3->voice_lock, flags);
349
350 if (use_internal_drums) {
351 snd_opl3_drum_switch(opl3, note, vel, 1, chan);
352 spin_unlock_irqrestore(&opl3->voice_lock, flags);
353 return;
354 }
355
356 __extra_prg:
224a0332
TI		 357 patch = snd_opl3_find_patch(opl3, prg, bank, 0);
358 if (!patch) {
1da177e4
LT		 359 spin_unlock_irqrestore(&opl3->voice_lock, flags);
360 return;
361 }
362
224a0332
TI		 363 fm = &patch->inst;
364 switch (patch->type) {
1da177e4
LT		 365 case FM_PATCH_OPL2:
366 instr_4op = 0;
367 break;
368 case FM_PATCH_OPL3:
369 if (opl3->hardware >= OPL3_HW_OPL3) {
370 instr_4op = 1;
371 break;
372 }
373 default:
1da177e4
LT		 374 spin_unlock_irqrestore(&opl3->voice_lock, flags);
375 return;
376 }
1da177e4 377#ifdef DEBUG_MIDI
45203832 378 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n",
224a0332 379 instr_4op ? 3 : 2, patch->name);
1da177e4
LT		 380#endif
381 /* in SYNTH mode, application takes care of voices */
382 /* in SEQ mode, allocate voice on free OPL3 channel */
383 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
384 voice = opl3_get_voice(opl3, instr_4op, chan);
385 } else {
386 /* remap OSS voice */
387 voice = snd_opl3_oss_map[chan->number];
388 }
389
a8d09e3a
TI		 390 if (voice < 0) {
391 spin_unlock_irqrestore(&opl3->voice_lock, flags);
392 return;
393 }
394
1da177e4
LT		 395 if (voice < MAX_OPL2_VOICES) {
396 /* Left register block for voices 0 .. 8 */
397 reg_side = OPL3_LEFT;
398 voice_offset = voice;
399 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07;
400 } else {
401 /* Right register block for voices 9 .. 17 */
402 reg_side = OPL3_RIGHT;
403 voice_offset = voice - MAX_OPL2_VOICES;
404 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38;
405 }
406
407 /* kill voice on channel */
408 vp = &opl3->voices[voice];
409 if (vp->state > 0) {
410 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
411 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
412 opl3->command(opl3, opl3_reg, reg_val);
413 }
414 if (instr_4op) {
415 vp2 = &opl3->voices[voice + 3];
416 if (vp->state > 0) {
417 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
418 voice_offset + 3);
419 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
420 opl3->command(opl3, opl3_reg, reg_val);
421 }
422 }
423
424 /* set connection register */
425 if (instr_4op) {
426 if ((opl3->connection_reg ^ connect_mask) & connect_mask) {
427 opl3->connection_reg |= connect_mask;
428 /* set connection bit */
429 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
430 opl3->command(opl3, opl3_reg, opl3->connection_reg);
431 }
432 } else {
433 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) {
434 opl3->connection_reg &= ~connect_mask;
435 /* clear connection bit */
436 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
437 opl3->command(opl3, opl3_reg, opl3->connection_reg);
438 }
439 }
440
441#ifdef DEBUG_MIDI
45203832 442 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n",
1da177e4
LT		 443 opl3->connection_reg);
444#endif
445 /*
446 * calculate volume depending on connection
447 * between FM operators (see include/opl3.h)
448 */
449 for (i = 0; i < (instr_4op ? 4 : 2); i++)
450 vol_op[i] = fm->op[i].ksl_level;
451
452 connection = fm->feedback_connection[0] & 0x01;
453 if (instr_4op) {
454 connection <<= 1;
455 connection |= fm->feedback_connection[1] & 0x01;
456
457 snd_opl3_calc_volume(&vol_op[3], vel, chan);
458 switch (connection) {
459 case 0x03:
460 snd_opl3_calc_volume(&vol_op[2], vel, chan);
461 /* fallthru */
462 case 0x02:
463 snd_opl3_calc_volume(&vol_op[0], vel, chan);
464 break;
465 case 0x01:
466 snd_opl3_calc_volume(&vol_op[1], vel, chan);
467 }
468 } else {
469 snd_opl3_calc_volume(&vol_op[1], vel, chan);
470 if (connection)
471 snd_opl3_calc_volume(&vol_op[0], vel, chan);
472 }
473
474 /* Program the FM voice characteristics */
475 for (i = 0; i < (instr_4op ? 4 : 2); i++) {
476#ifdef DEBUG_MIDI
45203832 477 snd_printk(KERN_DEBUG " --> programming operator %i\n", i);
1da177e4
LT		 478#endif
479 op_offset = snd_opl3_regmap[voice_offset][i];
480
481 /* Set OPL3 AM_VIB register of requested voice/operator */
482 reg_val = fm->op[i].am_vib;
483 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
484 opl3->command(opl3, opl3_reg, reg_val);
485
486 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
487 reg_val = vol_op[i];
488 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
489 opl3->command(opl3, opl3_reg, reg_val);
490
491 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
492 reg_val = fm->op[i].attack_decay;
493 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
494 opl3->command(opl3, opl3_reg, reg_val);
495
496 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
497 reg_val = fm->op[i].sustain_release;
498 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
499 opl3->command(opl3, opl3_reg, reg_val);
500
501 /* Select waveform */
502 reg_val = fm->op[i].wave_select;
503 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
504 opl3->command(opl3, opl3_reg, reg_val);
505 }
506
507 /* Set operator feedback and 2op inter-operator connection */
508 reg_val = fm->feedback_connection[0];
509 /* Set output voice connection */
510 reg_val |= OPL3_STEREO_BITS;
511 if (chan->gm_pan < 43)
512 reg_val &= ~OPL3_VOICE_TO_RIGHT;
513 if (chan->gm_pan > 85)
514 reg_val &= ~OPL3_VOICE_TO_LEFT;
515 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
516 opl3->command(opl3, opl3_reg, reg_val);
517
518 if (instr_4op) {
519 /* Set 4op inter-operator connection */
520 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT;
521 /* Set output voice connection */
522 reg_val |= OPL3_STEREO_BITS;
523 if (chan->gm_pan < 43)
524 reg_val &= ~OPL3_VOICE_TO_RIGHT;
525 if (chan->gm_pan > 85)
526 reg_val &= ~OPL3_VOICE_TO_LEFT;
527 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION +
528 voice_offset + 3);
529 opl3->command(opl3, opl3_reg, reg_val);
530 }
531
532 /*
533 * Special treatment of percussion notes for fm:
534 * Requested pitch is really program, and pitch for
535 * device is whatever was specified in the patch library.
536 */
537 if (fm->fix_key)
538 note = fm->fix_key;
539 /*
540 * use transpose if defined in patch library
541 */
542 if (fm->trnsps)
543 note += (fm->trnsps - 64);
544
545 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan);
546
547 /* Set OPL3 FNUM_LOW register of requested voice */
548 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
549 opl3->command(opl3, opl3_reg, fnum);
550
551 opl3->voices[voice].keyon_reg = blocknum;
552
553 /* Set output sound flag */
554 blocknum |= OPL3_KEYON_BIT;
555
556#ifdef DEBUG_MIDI
45203832 557 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice);
1da177e4
LT		 558#endif
559 /* Set OPL3 KEYON_BLOCK register of requested voice */
560 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
561 opl3->command(opl3, opl3_reg, blocknum);
562
563 /* kill note after fixed duration (in centiseconds) */
564 if (fm->fix_dur) {
565 opl3->voices[voice].note_off = jiffies +
566 (fm->fix_dur * HZ) / 100;
567 snd_opl3_start_timer(opl3);
568 opl3->voices[voice].note_off_check = 1;
569 } else
570 opl3->voices[voice].note_off_check = 0;
571
572 /* get extra pgm, but avoid possible loops */
573 extra_prg = (extra_prg) ? 0 : fm->modes;
574
1da177e4
LT		 575 /* do the bookkeeping */
576 vp->time = opl3->use_time++;
577 vp->note = key;
578 vp->chan = chan;
579
580 if (instr_4op) {
581 vp->state = SNDRV_OPL3_ST_ON_4OP;
582
583 vp2 = &opl3->voices[voice + 3];
584 vp2->time = opl3->use_time++;
585 vp2->note = key;
586 vp2->chan = chan;
587 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL;
588 } else {
589 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
590 /* 4op killed by 2op, release bounded voice */
591 vp2 = &opl3->voices[voice + 3];
592 vp2->time = opl3->use_time++;
593 vp2->state = SNDRV_OPL3_ST_OFF;
594 }
595 vp->state = SNDRV_OPL3_ST_ON_2OP;
596 }
597
598#ifdef DEBUG_ALLOC
599 debug_alloc(opl3, "note on ", voice);
600#endif
601
602 /* allocate extra program if specified in patch library */
603 if (extra_prg) {
604 if (extra_prg > 128) {
224a0332 605 bank = 128;
1da177e4 606 /* percussions start at 35 */
224a0332 607 prg = extra_prg - 128 + 35 - 1;
1da177e4 608 } else {
224a0332
TI		 609 bank = 0;
610 prg = extra_prg - 1;
1da177e4
LT		 611 }
612#ifdef DEBUG_MIDI
45203832 613 snd_printk(KERN_DEBUG " *** allocating extra program\n");
1da177e4
LT		 614#endif
615 goto __extra_prg;
616 }
617 spin_unlock_irqrestore(&opl3->voice_lock, flags);
618}
619
5b1646a8 620static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice)
1da177e4
LT		 621{
622 unsigned short reg_side;
623 unsigned char voice_offset;
624 unsigned short opl3_reg;
625
5b1646a8 626 struct snd_opl3_voice *vp, *vp2;
1da177e4 627
5e246b85
TI		 628 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
629 return;
1da177e4
LT		 630
631 vp = &opl3->voices[voice];
632 if (voice < MAX_OPL2_VOICES) {
633 /* Left register block for voices 0 .. 8 */
634 reg_side = OPL3_LEFT;
635 voice_offset = voice;
636 } else {
637 /* Right register block for voices 9 .. 17 */
638 reg_side = OPL3_RIGHT;
639 voice_offset = voice - MAX_OPL2_VOICES;
640 }
641
642 /* kill voice */
643#ifdef DEBUG_MIDI
45203832 644 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice);
1da177e4
LT		 645#endif
646 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
647 /* clear Key ON bit */
648 opl3->command(opl3, opl3_reg, vp->keyon_reg);
649
650 /* do the bookkeeping */
651 vp->time = opl3->use_time++;
652
653 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
654 vp2 = &opl3->voices[voice + 3];
655
656 vp2->time = opl3->use_time++;
657 vp2->state = SNDRV_OPL3_ST_OFF;
658 }
659 vp->state = SNDRV_OPL3_ST_OFF;
660#ifdef DEBUG_ALLOC
661 debug_alloc(opl3, "note off", voice);
662#endif
663
664}
665
666/*
667 * Release a note in response to a midi note off.
668 */
8dce39b8
KH		 669static void snd_opl3_note_off_unsafe(void *p, int note, int vel,
670 struct snd_midi_channel *chan)
1da177e4 671{
5b1646a8 672 struct snd_opl3 *opl3;
1da177e4
LT		 673
674 int voice;
5b1646a8 675 struct snd_opl3_voice *vp;
1da177e4 676
1da177e4
LT		 677 opl3 = p;
678
679#ifdef DEBUG_MIDI
45203832 680 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n",
1da177e4
LT		 681 chan->number, chan->midi_program, note);
682#endif
683
1da177e4
LT		 684 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
685 if (chan->drum_channel && use_internal_drums) {
686 snd_opl3_drum_switch(opl3, note, vel, 0, chan);
1da177e4
LT		 687 return;
688 }
689 /* this loop will hopefully kill all extra voices, because
690 they are grouped by the same channel and note values */
691 for (voice = 0; voice < opl3->max_voices; voice++) {
692 vp = &opl3->voices[voice];
693 if (vp->state > 0 && vp->chan == chan && vp->note == note) {
694 snd_opl3_kill_voice(opl3, voice);
695 }
696 }
697 } else {
698 /* remap OSS voices */
699 if (chan->number < MAX_OPL3_VOICES) {
700 voice = snd_opl3_oss_map[chan->number];
701 snd_opl3_kill_voice(opl3, voice);
702 }
703 }
8dce39b8
KH		 704}
705
706void snd_opl3_note_off(void *p, int note, int vel,
707 struct snd_midi_channel *chan)
708{
709 struct snd_opl3 *opl3 = p;
710 unsigned long flags;
711
712 spin_lock_irqsave(&opl3->voice_lock, flags);
713 snd_opl3_note_off_unsafe(p, note, vel, chan);
1da177e4
LT		 714 spin_unlock_irqrestore(&opl3->voice_lock, flags);
715}
716
717/*
718 * key pressure change
719 */
5b1646a8 720void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
1da177e4 721{
5b1646a8 722 struct snd_opl3 *opl3;
1da177e4
LT		 723
724 opl3 = p;
725#ifdef DEBUG_MIDI
45203832 726 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n",
1da177e4
LT		 727 chan->number, chan->midi_program);
728#endif
729}
730
731/*
732 * terminate note
733 */
5b1646a8 734void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan)
1da177e4 735{
5b1646a8 736 struct snd_opl3 *opl3;
1da177e4
LT		 737
738 opl3 = p;
739#ifdef DEBUG_MIDI
45203832 740 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n",
1da177e4
LT		 741 chan->number, chan->midi_program);
742#endif
743}
744
5b1646a8 745static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice)
1da177e4
LT		 746{
747 unsigned short reg_side;
748 unsigned char voice_offset;
749 unsigned short opl3_reg;
750
751 unsigned char fnum, blocknum;
752
5b1646a8 753 struct snd_opl3_voice *vp;
1da177e4 754
5e246b85
TI		 755 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
756 return;
1da177e4
LT		 757
758 vp = &opl3->voices[voice];
759 if (vp->chan == NULL)
760 return; /* not allocated? */
761
762 if (voice < MAX_OPL2_VOICES) {
763 /* Left register block for voices 0 .. 8 */
764 reg_side = OPL3_LEFT;
765 voice_offset = voice;
766 } else {
767 /* Right register block for voices 9 .. 17 */
768 reg_side = OPL3_RIGHT;
769 voice_offset = voice - MAX_OPL2_VOICES;
770 }
771
772 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan);
773
774 /* Set OPL3 FNUM_LOW register of requested voice */
775 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
776 opl3->command(opl3, opl3_reg, fnum);
777
778 vp->keyon_reg = blocknum;
779
780 /* Set output sound flag */
781 blocknum |= OPL3_KEYON_BIT;
782
783 /* Set OPL3 KEYON_BLOCK register of requested voice */
784 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
785 opl3->command(opl3, opl3_reg, blocknum);
786
787 vp->time = opl3->use_time++;
788}
789
790/*
791 * Update voice pitch controller
792 */
5b1646a8 793static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan)
1da177e4
LT		 794{
795 int voice;
5b1646a8 796 struct snd_opl3_voice *vp;
1da177e4
LT		 797
798 unsigned long flags;
799
800 spin_lock_irqsave(&opl3->voice_lock, flags);
801
802 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
803 for (voice = 0; voice < opl3->max_voices; voice++) {
804 vp = &opl3->voices[voice];
805 if (vp->state > 0 && vp->chan == chan) {
806 snd_opl3_update_pitch(opl3, voice);
807 }
808 }
809 } else {
810 /* remap OSS voices */
811 if (chan->number < MAX_OPL3_VOICES) {
812 voice = snd_opl3_oss_map[chan->number];
813 snd_opl3_update_pitch(opl3, voice);
814 }
815 }
816 spin_unlock_irqrestore(&opl3->voice_lock, flags);
817}
818
819/*
3a4fa0a2 820 * Deal with a controller type event. This includes all types of
1da177e4
LT		 821 * control events, not just the midi controllers
822 */
5b1646a8 823void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan)
1da177e4 824{
5b1646a8 825 struct snd_opl3 *opl3;
1da177e4
LT		 826
827 opl3 = p;
828#ifdef DEBUG_MIDI
45203832 829 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n",
1da177e4
LT		 830 type, chan->number, chan->midi_program);
831#endif
832
833 switch (type) {
834 case MIDI_CTL_MSB_MODWHEEL:
835 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63)
836 opl3->drum_reg |= OPL3_VIBRATO_DEPTH;
837 else
838 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH;
839 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
840 opl3->drum_reg);
841 break;
842 case MIDI_CTL_E2_TREMOLO_DEPTH:
843 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63)
844 opl3->drum_reg |= OPL3_TREMOLO_DEPTH;
845 else
846 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH;
847 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
848 opl3->drum_reg);
849 break;
850 case MIDI_CTL_PITCHBEND:
851 snd_opl3_pitch_ctrl(opl3, chan);
852 break;
853 }
854}
855
856/*
857 * NRPN events
858 */
5b1646a8
TI		 859void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan,
860 struct snd_midi_channel_set *chset)
1da177e4 861{
5b1646a8 862 struct snd_opl3 *opl3;
1da177e4
LT		 863
864 opl3 = p;
865#ifdef DEBUG_MIDI
45203832 866 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n",
1da177e4
LT		 867 chan->number, chan->midi_program);
868#endif
869}
870
871/*
872 * receive sysex
873 */
874void snd_opl3_sysex(void *p, unsigned char *buf, int len,
5b1646a8 875 int parsed, struct snd_midi_channel_set *chset)
1da177e4 876{
5b1646a8 877 struct snd_opl3 *opl3;
1da177e4
LT		 878
879 opl3 = p;
880#ifdef DEBUG_MIDI
45203832 881 snd_printk(KERN_DEBUG "SYSEX\n");
1da177e4
LT		 882#endif
883}
Linux kernel - Deliverables
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