1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (c) by Uros Bizjak <uros@kss-loka.si> |
4 | * |
5 | * Midi synth routines for OPL2/OPL3/OPL4 FM |
6 | */ |
7 | |
8 | #undef DEBUG_ALLOC |
9 | #undef DEBUG_MIDI |
10 | |
11 | #include "opl3_voice.h" |
12 | #include <sound/asoundef.h> |
13 | |
14 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
15 | struct snd_midi_channel *chan); |
16 | /* |
17 | * The next table looks magical, but it certainly is not. Its values have |
18 | * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception |
19 | * for i=0. This log-table converts a linear volume-scaling (0..127) to a |
20 | * logarithmic scaling as present in the FM-synthesizer chips. so : Volume |
21 | * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative |
22 | * volume -8 it was implemented as a table because it is only 128 bytes and |
23 | * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) |
24 | */ |
25 | |
26 | static const char opl3_volume_table[128] = |
27 | { |
28 | -63, -48, -40, -35, -32, -29, -27, -26, |
29 | -24, -23, -21, -20, -19, -18, -18, -17, |
30 | -16, -15, -15, -14, -13, -13, -12, -12, |
31 | -11, -11, -10, -10, -10, -9, -9, -8, |
32 | -8, -8, -7, -7, -7, -6, -6, -6, |
33 | -5, -5, -5, -5, -4, -4, -4, -4, |
34 | -3, -3, -3, -3, -2, -2, -2, -2, |
35 | -2, -1, -1, -1, -1, 0, 0, 0, |
36 | 0, 0, 0, 1, 1, 1, 1, 1, |
37 | 1, 2, 2, 2, 2, 2, 2, 2, |
38 | 3, 3, 3, 3, 3, 3, 3, 4, |
39 | 4, 4, 4, 4, 4, 4, 4, 5, |
40 | 5, 5, 5, 5, 5, 5, 5, 5, |
41 | 6, 6, 6, 6, 6, 6, 6, 6, |
42 | 6, 7, 7, 7, 7, 7, 7, 7, |
43 | 7, 7, 7, 8, 8, 8, 8, 8 |
44 | }; |
45 | |
46 | void snd_opl3_calc_volume(unsigned char *volbyte, int vel, |
47 | struct snd_midi_channel *chan) |
48 | { |
49 | int oldvol, newvol, n; |
50 | int volume; |
51 | |
52 | volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); |
53 | if (volume > 127) |
54 | volume = 127; |
55 | |
56 | oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); |
57 | |
58 | newvol = opl3_volume_table[volume] + oldvol; |
59 | if (newvol > OPL3_TOTAL_LEVEL_MASK) |
60 | newvol = OPL3_TOTAL_LEVEL_MASK; |
61 | else if (newvol < 0) |
62 | newvol = 0; |
63 | |
64 | n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); |
65 | |
66 | *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); |
67 | } |
68 | |
69 | /* |
70 | * Converts the note frequency to block and fnum values for the FM chip |
71 | */ |
72 | static const short opl3_note_table[16] = |
73 | { |
74 | 305, 323, /* for pitch bending, -2 semitones */ |
75 | 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, |
76 | 686, 726 /* for pitch bending, +2 semitones */ |
77 | }; |
78 | |
79 | static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, |
80 | int note, struct snd_midi_channel *chan) |
81 | { |
82 | int block = ((note / 12) & 0x07) - 1; |
83 | int idx = (note % 12) + 2; |
84 | int freq; |
85 | |
86 | if (chan->midi_pitchbend) { |
87 | int pitchbend = chan->midi_pitchbend; |
88 | int segment; |
89 | |
90 | if (pitchbend < -0x2000) |
91 | pitchbend = -0x2000; |
92 | if (pitchbend > 0x1FFF) |
93 | pitchbend = 0x1FFF; |
94 | |
95 | segment = pitchbend / 0x1000; |
96 | freq = opl3_note_table[idx+segment]; |
97 | freq += ((opl3_note_table[idx+segment+1] - freq) * |
98 | (pitchbend % 0x1000)) / 0x1000; |
99 | } else { |
100 | freq = opl3_note_table[idx]; |
101 | } |
102 | |
103 | *fnum = (unsigned char) freq; |
104 | *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | |
105 | ((block << 2) & OPL3_BLOCKNUM_MASK); |
106 | } |
107 | |
108 | |
109 | #ifdef DEBUG_ALLOC |
110 | static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { |
111 | int i; |
112 | char *str = "x.24" ; |
113 | |
114 | printk(KERN_DEBUG "time %.5i: %s [%.2i]: " , opl3->use_time, s, voice); |
115 | for (i = 0; i < opl3->max_voices; i++) |
116 | printk(KERN_CONT "%c" , *(str + opl3->voices[i].state + 1)); |
117 | printk(KERN_CONT "\n" ); |
118 | } |
119 | #endif |
120 | |
121 | /* |
122 | * Get a FM voice (channel) to play a note on. |
123 | */ |
124 | static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
125 | struct snd_midi_channel *chan) { |
126 | int chan_4op_1; /* first voice for 4op instrument */ |
127 | int chan_4op_2; /* second voice for 4op instrument */ |
128 | |
129 | struct snd_opl3_voice *vp, *vp2; |
130 | unsigned int voice_time; |
131 | int i; |
132 | |
133 | #ifdef DEBUG_ALLOC |
134 | char *alloc_type[3] = { "FREE " , "CHEAP " , "EXPENSIVE" }; |
135 | #endif |
136 | |
137 | /* This is our "allocation cost" table */ |
138 | enum { |
139 | FREE = 0, CHEAP, EXPENSIVE, END |
140 | }; |
141 | |
142 | /* Keeps track of what we are finding */ |
143 | struct best { |
144 | unsigned int time; |
145 | int voice; |
146 | } best[END]; |
147 | struct best *bp; |
148 | |
149 | for (i = 0; i < END; i++) { |
150 | best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
151 | best[i].voice = -1; |
152 | } |
153 | |
154 | /* Look through all the channels for the most suitable. */ |
155 | for (i = 0; i < opl3->max_voices; i++) { |
156 | vp = &opl3->voices[i]; |
157 | |
158 | if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) |
159 | /* skip unavailable channels, allocated by |
160 | drum voices or by bounded 4op voices) */ |
161 | continue; |
162 | |
163 | voice_time = vp->time; |
164 | bp = best; |
165 | |
166 | chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); |
167 | chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); |
168 | if (instr_4op) { |
169 | /* allocate 4op voice */ |
170 | /* skip channels unavailable to 4op instrument */ |
171 | if (!chan_4op_1) |
172 | continue; |
173 | |
174 | if (vp->state) |
175 | /* kill one voice, CHEAP */ |
176 | bp++; |
177 | /* get state of bounded 2op channel |
178 | to be allocated for 4op instrument */ |
179 | vp2 = &opl3->voices[i + 3]; |
180 | if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { |
181 | /* kill two voices, EXPENSIVE */ |
182 | bp++; |
183 | voice_time = max(voice_time, vp2->time); |
184 | } |
185 | } else { |
186 | /* allocate 2op voice */ |
187 | if ((chan_4op_1) || (chan_4op_2)) |
188 | /* use bounded channels for 2op, CHEAP */ |
189 | bp++; |
190 | else if (vp->state) |
191 | /* kill one voice on 2op channel, CHEAP */ |
192 | bp++; |
193 | /* raise kill cost to EXPENSIVE for all channels */ |
194 | if (vp->state) |
195 | bp++; |
196 | } |
197 | if (voice_time < bp->time) { |
198 | bp->time = voice_time; |
199 | bp->voice = i; |
200 | } |
201 | } |
202 | |
203 | for (i = 0; i < END; i++) { |
204 | if (best[i].voice >= 0) { |
205 | #ifdef DEBUG_ALLOC |
206 | printk(KERN_DEBUG "%s %iop allocation on voice %i\n" , |
207 | alloc_type[i], instr_4op ? 4 : 2, |
208 | best[i].voice); |
209 | #endif |
210 | return best[i].voice; |
211 | } |
212 | } |
213 | /* not found */ |
214 | return -1; |
215 | } |
216 | |
217 | /* ------------------------------ */ |
218 | |
219 | /* |
220 | * System timer interrupt function |
221 | */ |
222 | void snd_opl3_timer_func(struct timer_list *t) |
223 | { |
224 | |
225 | struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); |
226 | unsigned long flags; |
227 | int again = 0; |
228 | int i; |
229 | |
230 | spin_lock_irqsave(&opl3->voice_lock, flags); |
231 | for (i = 0; i < opl3->max_voices; i++) { |
232 | struct snd_opl3_voice *vp = &opl3->voices[i]; |
233 | if (vp->state > 0 && vp->note_off_check) { |
234 | if (vp->note_off == jiffies) |
235 | snd_opl3_note_off_unsafe(p: opl3, note: vp->note, vel: 0, |
236 | chan: vp->chan); |
237 | else |
238 | again++; |
239 | } |
240 | } |
241 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
242 | |
243 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); |
244 | if (again) |
245 | mod_timer(timer: &opl3->tlist, expires: jiffies + 1); /* invoke again */ |
246 | else |
247 | opl3->sys_timer_status = 0; |
248 | spin_unlock_irqrestore(lock: &opl3->sys_timer_lock, flags); |
249 | } |
250 | |
251 | /* |
252 | * Start system timer |
253 | */ |
254 | static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
255 | { |
256 | unsigned long flags; |
257 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); |
258 | if (! opl3->sys_timer_status) { |
259 | mod_timer(timer: &opl3->tlist, expires: jiffies + 1); |
260 | opl3->sys_timer_status = 1; |
261 | } |
262 | spin_unlock_irqrestore(lock: &opl3->sys_timer_lock, flags); |
263 | } |
264 | |
265 | /* ------------------------------ */ |
266 | |
267 | |
268 | static const int snd_opl3_oss_map[MAX_OPL3_VOICES] = { |
269 | 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 |
270 | }; |
271 | |
272 | /* |
273 | * Start a note. |
274 | */ |
275 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
276 | { |
277 | struct snd_opl3 *opl3; |
278 | int instr_4op; |
279 | |
280 | int voice; |
281 | struct snd_opl3_voice *vp, *vp2; |
282 | unsigned short connect_mask; |
283 | unsigned char connection; |
284 | unsigned char vol_op[4]; |
285 | |
286 | int = 0; |
287 | |
288 | unsigned short reg_side; |
289 | unsigned char op_offset; |
290 | unsigned char voice_offset; |
291 | unsigned short opl3_reg; |
292 | unsigned char reg_val; |
293 | unsigned char prg, bank; |
294 | |
295 | int key = note; |
296 | unsigned char fnum, blocknum; |
297 | int i; |
298 | |
299 | struct fm_patch *patch; |
300 | struct fm_instrument *fm; |
301 | unsigned long flags; |
302 | |
303 | opl3 = p; |
304 | |
305 | #ifdef DEBUG_MIDI |
306 | snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n" , |
307 | chan->number, chan->midi_program, note, vel); |
308 | #endif |
309 | |
310 | /* in SYNTH mode, application takes care of voices */ |
311 | /* in SEQ mode, drum voice numbers are notes on drum channel */ |
312 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
313 | if (chan->drum_channel) { |
314 | /* percussion instruments are located in bank 128 */ |
315 | bank = 128; |
316 | prg = note; |
317 | } else { |
318 | bank = chan->gm_bank_select; |
319 | prg = chan->midi_program; |
320 | } |
321 | } else { |
322 | /* Prepare for OSS mode */ |
323 | if (chan->number >= MAX_OPL3_VOICES) |
324 | return; |
325 | |
326 | /* OSS instruments are located in bank 127 */ |
327 | bank = 127; |
328 | prg = chan->midi_program; |
329 | } |
330 | |
331 | spin_lock_irqsave(&opl3->voice_lock, flags); |
332 | |
333 | if (use_internal_drums) { |
334 | snd_opl3_drum_switch(opl3, note, vel, on_off: 1, chan); |
335 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
336 | return; |
337 | } |
338 | |
339 | : |
340 | patch = snd_opl3_find_patch(opl3, prog: prg, bank, create_patch: 0); |
341 | if (!patch) { |
342 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
343 | return; |
344 | } |
345 | |
346 | fm = &patch->inst; |
347 | switch (patch->type) { |
348 | case FM_PATCH_OPL2: |
349 | instr_4op = 0; |
350 | break; |
351 | case FM_PATCH_OPL3: |
352 | if (opl3->hardware >= OPL3_HW_OPL3) { |
353 | instr_4op = 1; |
354 | break; |
355 | } |
356 | fallthrough; |
357 | default: |
358 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
359 | return; |
360 | } |
361 | #ifdef DEBUG_MIDI |
362 | snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n" , |
363 | instr_4op ? 3 : 2, patch->name); |
364 | #endif |
365 | /* in SYNTH mode, application takes care of voices */ |
366 | /* in SEQ mode, allocate voice on free OPL3 channel */ |
367 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
368 | voice = opl3_get_voice(opl3, instr_4op, chan); |
369 | } else { |
370 | /* remap OSS voice */ |
371 | voice = snd_opl3_oss_map[chan->number]; |
372 | } |
373 | |
374 | if (voice < 0) { |
375 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
376 | return; |
377 | } |
378 | |
379 | if (voice < MAX_OPL2_VOICES) { |
380 | /* Left register block for voices 0 .. 8 */ |
381 | reg_side = OPL3_LEFT; |
382 | voice_offset = voice; |
383 | connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; |
384 | } else { |
385 | /* Right register block for voices 9 .. 17 */ |
386 | reg_side = OPL3_RIGHT; |
387 | voice_offset = voice - MAX_OPL2_VOICES; |
388 | connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; |
389 | } |
390 | |
391 | /* kill voice on channel */ |
392 | vp = &opl3->voices[voice]; |
393 | if (vp->state > 0) { |
394 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
395 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; |
396 | opl3->command(opl3, opl3_reg, reg_val); |
397 | } |
398 | if (instr_4op) { |
399 | vp2 = &opl3->voices[voice + 3]; |
400 | if (vp2->state > 0) { |
401 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + |
402 | voice_offset + 3); |
403 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; |
404 | opl3->command(opl3, opl3_reg, reg_val); |
405 | } |
406 | } |
407 | |
408 | /* set connection register */ |
409 | if (instr_4op) { |
410 | if ((opl3->connection_reg ^ connect_mask) & connect_mask) { |
411 | opl3->connection_reg |= connect_mask; |
412 | /* set connection bit */ |
413 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; |
414 | opl3->command(opl3, opl3_reg, opl3->connection_reg); |
415 | } |
416 | } else { |
417 | if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { |
418 | opl3->connection_reg &= ~connect_mask; |
419 | /* clear connection bit */ |
420 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; |
421 | opl3->command(opl3, opl3_reg, opl3->connection_reg); |
422 | } |
423 | } |
424 | |
425 | #ifdef DEBUG_MIDI |
426 | snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n" , |
427 | opl3->connection_reg); |
428 | #endif |
429 | /* |
430 | * calculate volume depending on connection |
431 | * between FM operators (see include/opl3.h) |
432 | */ |
433 | for (i = 0; i < (instr_4op ? 4 : 2); i++) |
434 | vol_op[i] = fm->op[i].ksl_level; |
435 | |
436 | connection = fm->feedback_connection[0] & 0x01; |
437 | if (instr_4op) { |
438 | connection <<= 1; |
439 | connection |= fm->feedback_connection[1] & 0x01; |
440 | |
441 | snd_opl3_calc_volume(volbyte: &vol_op[3], vel, chan); |
442 | switch (connection) { |
443 | case 0x03: |
444 | snd_opl3_calc_volume(volbyte: &vol_op[2], vel, chan); |
445 | fallthrough; |
446 | case 0x02: |
447 | snd_opl3_calc_volume(volbyte: &vol_op[0], vel, chan); |
448 | break; |
449 | case 0x01: |
450 | snd_opl3_calc_volume(volbyte: &vol_op[1], vel, chan); |
451 | } |
452 | } else { |
453 | snd_opl3_calc_volume(volbyte: &vol_op[1], vel, chan); |
454 | if (connection) |
455 | snd_opl3_calc_volume(volbyte: &vol_op[0], vel, chan); |
456 | } |
457 | |
458 | /* Program the FM voice characteristics */ |
459 | for (i = 0; i < (instr_4op ? 4 : 2); i++) { |
460 | #ifdef DEBUG_MIDI |
461 | snd_printk(KERN_DEBUG " --> programming operator %i\n" , i); |
462 | #endif |
463 | op_offset = snd_opl3_regmap[voice_offset][i]; |
464 | |
465 | /* Set OPL3 AM_VIB register of requested voice/operator */ |
466 | reg_val = fm->op[i].am_vib; |
467 | opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); |
468 | opl3->command(opl3, opl3_reg, reg_val); |
469 | |
470 | /* Set OPL3 KSL_LEVEL register of requested voice/operator */ |
471 | reg_val = vol_op[i]; |
472 | opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); |
473 | opl3->command(opl3, opl3_reg, reg_val); |
474 | |
475 | /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ |
476 | reg_val = fm->op[i].attack_decay; |
477 | opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); |
478 | opl3->command(opl3, opl3_reg, reg_val); |
479 | |
480 | /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ |
481 | reg_val = fm->op[i].sustain_release; |
482 | opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); |
483 | opl3->command(opl3, opl3_reg, reg_val); |
484 | |
485 | /* Select waveform */ |
486 | reg_val = fm->op[i].wave_select; |
487 | opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); |
488 | opl3->command(opl3, opl3_reg, reg_val); |
489 | } |
490 | |
491 | /* Set operator feedback and 2op inter-operator connection */ |
492 | reg_val = fm->feedback_connection[0]; |
493 | /* Set output voice connection */ |
494 | reg_val |= OPL3_STEREO_BITS; |
495 | if (chan->gm_pan < 43) |
496 | reg_val &= ~OPL3_VOICE_TO_RIGHT; |
497 | if (chan->gm_pan > 85) |
498 | reg_val &= ~OPL3_VOICE_TO_LEFT; |
499 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); |
500 | opl3->command(opl3, opl3_reg, reg_val); |
501 | |
502 | if (instr_4op) { |
503 | /* Set 4op inter-operator connection */ |
504 | reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; |
505 | /* Set output voice connection */ |
506 | reg_val |= OPL3_STEREO_BITS; |
507 | if (chan->gm_pan < 43) |
508 | reg_val &= ~OPL3_VOICE_TO_RIGHT; |
509 | if (chan->gm_pan > 85) |
510 | reg_val &= ~OPL3_VOICE_TO_LEFT; |
511 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + |
512 | voice_offset + 3); |
513 | opl3->command(opl3, opl3_reg, reg_val); |
514 | } |
515 | |
516 | /* |
517 | * Special treatment of percussion notes for fm: |
518 | * Requested pitch is really program, and pitch for |
519 | * device is whatever was specified in the patch library. |
520 | */ |
521 | if (fm->fix_key) |
522 | note = fm->fix_key; |
523 | /* |
524 | * use transpose if defined in patch library |
525 | */ |
526 | if (fm->trnsps) |
527 | note += (fm->trnsps - 64); |
528 | |
529 | snd_opl3_calc_pitch(fnum: &fnum, blocknum: &blocknum, note, chan); |
530 | |
531 | /* Set OPL3 FNUM_LOW register of requested voice */ |
532 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); |
533 | opl3->command(opl3, opl3_reg, fnum); |
534 | |
535 | opl3->voices[voice].keyon_reg = blocknum; |
536 | |
537 | /* Set output sound flag */ |
538 | blocknum |= OPL3_KEYON_BIT; |
539 | |
540 | #ifdef DEBUG_MIDI |
541 | snd_printk(KERN_DEBUG " --> trigger voice %i\n" , voice); |
542 | #endif |
543 | /* Set OPL3 KEYON_BLOCK register of requested voice */ |
544 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
545 | opl3->command(opl3, opl3_reg, blocknum); |
546 | |
547 | /* kill note after fixed duration (in centiseconds) */ |
548 | if (fm->fix_dur) { |
549 | opl3->voices[voice].note_off = jiffies + |
550 | (fm->fix_dur * HZ) / 100; |
551 | snd_opl3_start_timer(opl3); |
552 | opl3->voices[voice].note_off_check = 1; |
553 | } else |
554 | opl3->voices[voice].note_off_check = 0; |
555 | |
556 | /* get extra pgm, but avoid possible loops */ |
557 | extra_prg = (extra_prg) ? 0 : fm->modes; |
558 | |
559 | /* do the bookkeeping */ |
560 | vp->time = opl3->use_time++; |
561 | vp->note = key; |
562 | vp->chan = chan; |
563 | |
564 | if (instr_4op) { |
565 | vp->state = SNDRV_OPL3_ST_ON_4OP; |
566 | |
567 | vp2 = &opl3->voices[voice + 3]; |
568 | vp2->time = opl3->use_time++; |
569 | vp2->note = key; |
570 | vp2->chan = chan; |
571 | vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; |
572 | } else { |
573 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { |
574 | /* 4op killed by 2op, release bounded voice */ |
575 | vp2 = &opl3->voices[voice + 3]; |
576 | vp2->time = opl3->use_time++; |
577 | vp2->state = SNDRV_OPL3_ST_OFF; |
578 | } |
579 | vp->state = SNDRV_OPL3_ST_ON_2OP; |
580 | } |
581 | |
582 | #ifdef DEBUG_ALLOC |
583 | debug_alloc(opl3, "note on " , voice); |
584 | #endif |
585 | |
586 | /* allocate extra program if specified in patch library */ |
587 | if (extra_prg) { |
588 | if (extra_prg > 128) { |
589 | bank = 128; |
590 | /* percussions start at 35 */ |
591 | prg = extra_prg - 128 + 35 - 1; |
592 | } else { |
593 | bank = 0; |
594 | prg = extra_prg - 1; |
595 | } |
596 | #ifdef DEBUG_MIDI |
597 | snd_printk(KERN_DEBUG " *** allocating extra program\n" ); |
598 | #endif |
599 | goto __extra_prg; |
600 | } |
601 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
602 | } |
603 | |
604 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
605 | { |
606 | unsigned short reg_side; |
607 | unsigned char voice_offset; |
608 | unsigned short opl3_reg; |
609 | |
610 | struct snd_opl3_voice *vp, *vp2; |
611 | |
612 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
613 | return; |
614 | |
615 | vp = &opl3->voices[voice]; |
616 | if (voice < MAX_OPL2_VOICES) { |
617 | /* Left register block for voices 0 .. 8 */ |
618 | reg_side = OPL3_LEFT; |
619 | voice_offset = voice; |
620 | } else { |
621 | /* Right register block for voices 9 .. 17 */ |
622 | reg_side = OPL3_RIGHT; |
623 | voice_offset = voice - MAX_OPL2_VOICES; |
624 | } |
625 | |
626 | /* kill voice */ |
627 | #ifdef DEBUG_MIDI |
628 | snd_printk(KERN_DEBUG " --> kill voice %i\n" , voice); |
629 | #endif |
630 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
631 | /* clear Key ON bit */ |
632 | opl3->command(opl3, opl3_reg, vp->keyon_reg); |
633 | |
634 | /* do the bookkeeping */ |
635 | vp->time = opl3->use_time++; |
636 | |
637 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { |
638 | vp2 = &opl3->voices[voice + 3]; |
639 | |
640 | vp2->time = opl3->use_time++; |
641 | vp2->state = SNDRV_OPL3_ST_OFF; |
642 | } |
643 | vp->state = SNDRV_OPL3_ST_OFF; |
644 | #ifdef DEBUG_ALLOC |
645 | debug_alloc(opl3, "note off" , voice); |
646 | #endif |
647 | |
648 | } |
649 | |
650 | /* |
651 | * Release a note in response to a midi note off. |
652 | */ |
653 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
654 | struct snd_midi_channel *chan) |
655 | { |
656 | struct snd_opl3 *opl3; |
657 | |
658 | int voice; |
659 | struct snd_opl3_voice *vp; |
660 | |
661 | opl3 = p; |
662 | |
663 | #ifdef DEBUG_MIDI |
664 | snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n" , |
665 | chan->number, chan->midi_program, note); |
666 | #endif |
667 | |
668 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
669 | if (chan->drum_channel && use_internal_drums) { |
670 | snd_opl3_drum_switch(opl3, note, vel, on_off: 0, chan); |
671 | return; |
672 | } |
673 | /* this loop will hopefully kill all extra voices, because |
674 | they are grouped by the same channel and note values */ |
675 | for (voice = 0; voice < opl3->max_voices; voice++) { |
676 | vp = &opl3->voices[voice]; |
677 | if (vp->state > 0 && vp->chan == chan && vp->note == note) { |
678 | snd_opl3_kill_voice(opl3, voice); |
679 | } |
680 | } |
681 | } else { |
682 | /* remap OSS voices */ |
683 | if (chan->number < MAX_OPL3_VOICES) { |
684 | voice = snd_opl3_oss_map[chan->number]; |
685 | snd_opl3_kill_voice(opl3, voice); |
686 | } |
687 | } |
688 | } |
689 | |
690 | void snd_opl3_note_off(void *p, int note, int vel, |
691 | struct snd_midi_channel *chan) |
692 | { |
693 | struct snd_opl3 *opl3 = p; |
694 | unsigned long flags; |
695 | |
696 | spin_lock_irqsave(&opl3->voice_lock, flags); |
697 | snd_opl3_note_off_unsafe(p, note, vel, chan); |
698 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
699 | } |
700 | |
701 | /* |
702 | * key pressure change |
703 | */ |
704 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
705 | { |
706 | #ifdef DEBUG_MIDI |
707 | snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n" , |
708 | chan->number, chan->midi_program); |
709 | #endif |
710 | } |
711 | |
712 | /* |
713 | * terminate note |
714 | */ |
715 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
716 | { |
717 | #ifdef DEBUG_MIDI |
718 | snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n" , |
719 | chan->number, chan->midi_program); |
720 | #endif |
721 | } |
722 | |
723 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
724 | { |
725 | unsigned short reg_side; |
726 | unsigned char voice_offset; |
727 | unsigned short opl3_reg; |
728 | |
729 | unsigned char fnum, blocknum; |
730 | |
731 | struct snd_opl3_voice *vp; |
732 | |
733 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
734 | return; |
735 | |
736 | vp = &opl3->voices[voice]; |
737 | if (vp->chan == NULL) |
738 | return; /* not allocated? */ |
739 | |
740 | if (voice < MAX_OPL2_VOICES) { |
741 | /* Left register block for voices 0 .. 8 */ |
742 | reg_side = OPL3_LEFT; |
743 | voice_offset = voice; |
744 | } else { |
745 | /* Right register block for voices 9 .. 17 */ |
746 | reg_side = OPL3_RIGHT; |
747 | voice_offset = voice - MAX_OPL2_VOICES; |
748 | } |
749 | |
750 | snd_opl3_calc_pitch(fnum: &fnum, blocknum: &blocknum, note: vp->note, chan: vp->chan); |
751 | |
752 | /* Set OPL3 FNUM_LOW register of requested voice */ |
753 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); |
754 | opl3->command(opl3, opl3_reg, fnum); |
755 | |
756 | vp->keyon_reg = blocknum; |
757 | |
758 | /* Set output sound flag */ |
759 | blocknum |= OPL3_KEYON_BIT; |
760 | |
761 | /* Set OPL3 KEYON_BLOCK register of requested voice */ |
762 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
763 | opl3->command(opl3, opl3_reg, blocknum); |
764 | |
765 | vp->time = opl3->use_time++; |
766 | } |
767 | |
768 | /* |
769 | * Update voice pitch controller |
770 | */ |
771 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
772 | { |
773 | int voice; |
774 | struct snd_opl3_voice *vp; |
775 | |
776 | unsigned long flags; |
777 | |
778 | spin_lock_irqsave(&opl3->voice_lock, flags); |
779 | |
780 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
781 | for (voice = 0; voice < opl3->max_voices; voice++) { |
782 | vp = &opl3->voices[voice]; |
783 | if (vp->state > 0 && vp->chan == chan) { |
784 | snd_opl3_update_pitch(opl3, voice); |
785 | } |
786 | } |
787 | } else { |
788 | /* remap OSS voices */ |
789 | if (chan->number < MAX_OPL3_VOICES) { |
790 | voice = snd_opl3_oss_map[chan->number]; |
791 | snd_opl3_update_pitch(opl3, voice); |
792 | } |
793 | } |
794 | spin_unlock_irqrestore(lock: &opl3->voice_lock, flags); |
795 | } |
796 | |
797 | /* |
798 | * Deal with a controller type event. This includes all types of |
799 | * control events, not just the midi controllers |
800 | */ |
801 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
802 | { |
803 | struct snd_opl3 *opl3; |
804 | |
805 | opl3 = p; |
806 | #ifdef DEBUG_MIDI |
807 | snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n" , |
808 | type, chan->number, chan->midi_program); |
809 | #endif |
810 | |
811 | switch (type) { |
812 | case MIDI_CTL_MSB_MODWHEEL: |
813 | if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) |
814 | opl3->drum_reg |= OPL3_VIBRATO_DEPTH; |
815 | else |
816 | opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; |
817 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, |
818 | opl3->drum_reg); |
819 | break; |
820 | case MIDI_CTL_E2_TREMOLO_DEPTH: |
821 | if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) |
822 | opl3->drum_reg |= OPL3_TREMOLO_DEPTH; |
823 | else |
824 | opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; |
825 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, |
826 | opl3->drum_reg); |
827 | break; |
828 | case MIDI_CTL_PITCHBEND: |
829 | snd_opl3_pitch_ctrl(opl3, chan); |
830 | break; |
831 | } |
832 | } |
833 | |
834 | /* |
835 | * NRPN events |
836 | */ |
837 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
838 | struct snd_midi_channel_set *chset) |
839 | { |
840 | #ifdef DEBUG_MIDI |
841 | snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n" , |
842 | chan->number, chan->midi_program); |
843 | #endif |
844 | } |
845 | |
846 | /* |
847 | * receive sysex |
848 | */ |
849 | void snd_opl3_sysex(void *p, unsigned char *buf, int len, |
850 | int parsed, struct snd_midi_channel_set *chset) |
851 | { |
852 | #ifdef DEBUG_MIDI |
853 | snd_printk(KERN_DEBUG "SYSEX\n" ); |
854 | #endif |
855 | } |
856 | |