Commit | Line | Data |
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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 | ||
8dce39b8 KH |
28 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
29 | struct snd_midi_channel *chan); | |
1da177e4 LT |
30 | /* |
31 | * The next table looks magical, but it certainly is not. Its values have | |
32 | * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception | |
33 | * for i=0. This log-table converts a linear volume-scaling (0..127) to a | |
34 | * logarithmic scaling as present in the FM-synthesizer chips. so : Volume | |
35 | * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative | |
36 | * volume -8 it was implemented as a table because it is only 128 bytes and | |
37 | * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) | |
38 | */ | |
39 | ||
40 | static char opl3_volume_table[128] = | |
41 | { | |
42 | -63, -48, -40, -35, -32, -29, -27, -26, | |
43 | -24, -23, -21, -20, -19, -18, -18, -17, | |
44 | -16, -15, -15, -14, -13, -13, -12, -12, | |
45 | -11, -11, -10, -10, -10, -9, -9, -8, | |
46 | -8, -8, -7, -7, -7, -6, -6, -6, | |
47 | -5, -5, -5, -5, -4, -4, -4, -4, | |
48 | -3, -3, -3, -3, -2, -2, -2, -2, | |
49 | -2, -1, -1, -1, -1, 0, 0, 0, | |
50 | 0, 0, 0, 1, 1, 1, 1, 1, | |
51 | 1, 2, 2, 2, 2, 2, 2, 2, | |
52 | 3, 3, 3, 3, 3, 3, 3, 4, | |
53 | 4, 4, 4, 4, 4, 4, 4, 5, | |
54 | 5, 5, 5, 5, 5, 5, 5, 5, | |
55 | 6, 6, 6, 6, 6, 6, 6, 6, | |
56 | 6, 7, 7, 7, 7, 7, 7, 7, | |
57 | 7, 7, 7, 8, 8, 8, 8, 8 | |
58 | }; | |
59 | ||
60 | void snd_opl3_calc_volume(unsigned char *volbyte, int vel, | |
5b1646a8 | 61 | struct snd_midi_channel *chan) |
1da177e4 LT |
62 | { |
63 | int oldvol, newvol, n; | |
64 | int volume; | |
65 | ||
66 | volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); | |
67 | if (volume > 127) | |
68 | volume = 127; | |
69 | ||
70 | oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); | |
71 | ||
72 | newvol = opl3_volume_table[volume] + oldvol; | |
73 | if (newvol > OPL3_TOTAL_LEVEL_MASK) | |
74 | newvol = OPL3_TOTAL_LEVEL_MASK; | |
75 | else if (newvol < 0) | |
76 | newvol = 0; | |
77 | ||
78 | n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); | |
79 | ||
80 | *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); | |
81 | } | |
82 | ||
83 | /* | |
84 | * Converts the note frequency to block and fnum values for the FM chip | |
85 | */ | |
86 | static short opl3_note_table[16] = | |
87 | { | |
88 | 305, 323, /* for pitch bending, -2 semitones */ | |
89 | 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, | |
90 | 686, 726 /* for pitch bending, +2 semitones */ | |
91 | }; | |
92 | ||
93 | static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, | |
5b1646a8 | 94 | int note, struct snd_midi_channel *chan) |
1da177e4 LT |
95 | { |
96 | int block = ((note / 12) & 0x07) - 1; | |
97 | int idx = (note % 12) + 2; | |
98 | int freq; | |
99 | ||
100 | if (chan->midi_pitchbend) { | |
101 | int pitchbend = chan->midi_pitchbend; | |
102 | int segment; | |
103 | ||
d1243806 DC |
104 | if (pitchbend < -0x2000) |
105 | pitchbend = -0x2000; | |
1da177e4 LT |
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 | |
5b1646a8 | 124 | static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { |
1da177e4 LT |
125 | int i; |
126 | char *str = "x.24"; | |
127 | ||
45203832 | 128 | printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); |
1da177e4 | 129 | for (i = 0; i < opl3->max_voices; i++) |
53cfa99e TI |
130 | printk(KERN_CONT "%c", *(str + opl3->voices[i].state + 1)); |
131 | printk(KERN_CONT "\n"); | |
1da177e4 LT |
132 | } |
133 | #endif | |
134 | ||
135 | /* | |
136 | * Get a FM voice (channel) to play a note on. | |
137 | */ | |
5b1646a8 TI |
138 | static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
139 | struct snd_midi_channel *chan) { | |
1da177e4 LT |
140 | int chan_4op_1; /* first voice for 4op instrument */ |
141 | int chan_4op_2; /* second voice for 4op instrument */ | |
142 | ||
5b1646a8 | 143 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
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++) { | |
395d9dd5 | 164 | best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
1da177e4 LT |
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 | |
45203832 | 221 | printk(KERN_DEBUG "%s %iop allocation on voice %i\n", |
1da177e4 LT |
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 | */ | |
bc47ba90 | 237 | void snd_opl3_timer_func(struct timer_list *t) |
1da177e4 LT |
238 | { |
239 | ||
bc47ba90 | 240 | struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); |
b32425ac | 241 | unsigned long flags; |
1da177e4 LT |
242 | int again = 0; |
243 | int i; | |
244 | ||
8dce39b8 | 245 | spin_lock_irqsave(&opl3->voice_lock, flags); |
1da177e4 | 246 | for (i = 0; i < opl3->max_voices; i++) { |
5b1646a8 | 247 | struct snd_opl3_voice *vp = &opl3->voices[i]; |
1da177e4 LT |
248 | if (vp->state > 0 && vp->note_off_check) { |
249 | if (vp->note_off == jiffies) | |
8dce39b8 KH |
250 | snd_opl3_note_off_unsafe(opl3, vp->note, 0, |
251 | vp->chan); | |
1da177e4 LT |
252 | else |
253 | again++; | |
254 | } | |
255 | } | |
8dce39b8 KH |
256 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
257 | ||
258 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
f5d5f75f TI |
259 | if (again) |
260 | mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ | |
261 | else | |
1da177e4 | 262 | opl3->sys_timer_status = 0; |
b32425ac | 263 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
1da177e4 LT |
264 | } |
265 | ||
266 | /* | |
267 | * Start system timer | |
268 | */ | |
5b1646a8 | 269 | static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
1da177e4 LT |
270 | { |
271 | unsigned long flags; | |
272 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
273 | if (! opl3->sys_timer_status) { | |
f5d5f75f | 274 | mod_timer(&opl3->tlist, jiffies + 1); |
1da177e4 LT |
275 | opl3->sys_timer_status = 1; |
276 | } | |
277 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); | |
278 | } | |
279 | ||
280 | /* ------------------------------ */ | |
281 | ||
282 | ||
283 | static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { | |
284 | 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 | |
285 | }; | |
286 | ||
287 | /* | |
288 | * Start a note. | |
289 | */ | |
5b1646a8 | 290 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 291 | { |
5b1646a8 | 292 | struct snd_opl3 *opl3; |
1da177e4 LT |
293 | int instr_4op; |
294 | ||
295 | int voice; | |
5b1646a8 | 296 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
297 | unsigned short connect_mask; |
298 | unsigned char connection; | |
299 | unsigned char vol_op[4]; | |
300 | ||
301 | int extra_prg = 0; | |
302 | ||
303 | unsigned short reg_side; | |
304 | unsigned char op_offset; | |
305 | unsigned char voice_offset; | |
306 | unsigned short opl3_reg; | |
307 | unsigned char reg_val; | |
224a0332 | 308 | unsigned char prg, bank; |
1da177e4 LT |
309 | |
310 | int key = note; | |
311 | unsigned char fnum, blocknum; | |
312 | int i; | |
313 | ||
224a0332 | 314 | struct fm_patch *patch; |
5b1646a8 | 315 | struct fm_instrument *fm; |
1da177e4 LT |
316 | unsigned long flags; |
317 | ||
318 | opl3 = p; | |
319 | ||
320 | #ifdef DEBUG_MIDI | |
45203832 | 321 | snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", |
1da177e4 LT |
322 | chan->number, chan->midi_program, note, vel); |
323 | #endif | |
1da177e4 LT |
324 | |
325 | /* in SYNTH mode, application takes care of voices */ | |
326 | /* in SEQ mode, drum voice numbers are notes on drum channel */ | |
327 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
328 | if (chan->drum_channel) { | |
329 | /* percussion instruments are located in bank 128 */ | |
224a0332 TI |
330 | bank = 128; |
331 | prg = note; | |
1da177e4 | 332 | } else { |
224a0332 TI |
333 | bank = chan->gm_bank_select; |
334 | prg = chan->midi_program; | |
1da177e4 LT |
335 | } |
336 | } else { | |
337 | /* Prepare for OSS mode */ | |
338 | if (chan->number >= MAX_OPL3_VOICES) | |
339 | return; | |
340 | ||
341 | /* OSS instruments are located in bank 127 */ | |
224a0332 TI |
342 | bank = 127; |
343 | prg = chan->midi_program; | |
1da177e4 LT |
344 | } |
345 | ||
346 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
347 | ||
348 | if (use_internal_drums) { | |
349 | snd_opl3_drum_switch(opl3, note, vel, 1, chan); | |
350 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
351 | return; | |
352 | } | |
353 | ||
354 | __extra_prg: | |
224a0332 TI |
355 | patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
356 | if (!patch) { | |
1da177e4 LT |
357 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
358 | return; | |
359 | } | |
360 | ||
224a0332 TI |
361 | fm = &patch->inst; |
362 | switch (patch->type) { | |
1da177e4 LT |
363 | case FM_PATCH_OPL2: |
364 | instr_4op = 0; | |
365 | break; | |
366 | case FM_PATCH_OPL3: | |
367 | if (opl3->hardware >= OPL3_HW_OPL3) { | |
368 | instr_4op = 1; | |
369 | break; | |
370 | } | |
0c93c5ce | 371 | /* fall through */ |
1da177e4 | 372 | default: |
1da177e4 LT |
373 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
374 | return; | |
375 | } | |
1da177e4 | 376 | #ifdef DEBUG_MIDI |
45203832 | 377 | snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", |
224a0332 | 378 | instr_4op ? 3 : 2, patch->name); |
1da177e4 LT |
379 | #endif |
380 | /* in SYNTH mode, application takes care of voices */ | |
381 | /* in SEQ mode, allocate voice on free OPL3 channel */ | |
382 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
383 | voice = opl3_get_voice(opl3, instr_4op, chan); | |
384 | } else { | |
385 | /* remap OSS voice */ | |
386 | voice = snd_opl3_oss_map[chan->number]; | |
387 | } | |
388 | ||
a8d09e3a TI |
389 | if (voice < 0) { |
390 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
391 | return; | |
392 | } | |
393 | ||
1da177e4 LT |
394 | if (voice < MAX_OPL2_VOICES) { |
395 | /* Left register block for voices 0 .. 8 */ | |
396 | reg_side = OPL3_LEFT; | |
397 | voice_offset = voice; | |
398 | connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; | |
399 | } else { | |
400 | /* Right register block for voices 9 .. 17 */ | |
401 | reg_side = OPL3_RIGHT; | |
402 | voice_offset = voice - MAX_OPL2_VOICES; | |
403 | connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; | |
404 | } | |
405 | ||
406 | /* kill voice on channel */ | |
407 | vp = &opl3->voices[voice]; | |
408 | if (vp->state > 0) { | |
409 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
410 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
411 | opl3->command(opl3, opl3_reg, reg_val); | |
412 | } | |
413 | if (instr_4op) { | |
414 | vp2 = &opl3->voices[voice + 3]; | |
415 | if (vp->state > 0) { | |
416 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + | |
417 | voice_offset + 3); | |
418 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
419 | opl3->command(opl3, opl3_reg, reg_val); | |
420 | } | |
421 | } | |
422 | ||
423 | /* set connection register */ | |
424 | if (instr_4op) { | |
425 | if ((opl3->connection_reg ^ connect_mask) & connect_mask) { | |
426 | opl3->connection_reg |= connect_mask; | |
427 | /* set connection bit */ | |
428 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
429 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
430 | } | |
431 | } else { | |
432 | if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { | |
433 | opl3->connection_reg &= ~connect_mask; | |
434 | /* clear connection bit */ | |
435 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
436 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
437 | } | |
438 | } | |
439 | ||
440 | #ifdef DEBUG_MIDI | |
45203832 | 441 | snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", |
1da177e4 LT |
442 | opl3->connection_reg); |
443 | #endif | |
444 | /* | |
445 | * calculate volume depending on connection | |
446 | * between FM operators (see include/opl3.h) | |
447 | */ | |
448 | for (i = 0; i < (instr_4op ? 4 : 2); i++) | |
449 | vol_op[i] = fm->op[i].ksl_level; | |
450 | ||
451 | connection = fm->feedback_connection[0] & 0x01; | |
452 | if (instr_4op) { | |
453 | connection <<= 1; | |
454 | connection |= fm->feedback_connection[1] & 0x01; | |
455 | ||
456 | snd_opl3_calc_volume(&vol_op[3], vel, chan); | |
457 | switch (connection) { | |
458 | case 0x03: | |
459 | snd_opl3_calc_volume(&vol_op[2], vel, chan); | |
460 | /* fallthru */ | |
461 | case 0x02: | |
462 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
463 | break; | |
464 | case 0x01: | |
465 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
466 | } | |
467 | } else { | |
468 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
469 | if (connection) | |
470 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
471 | } | |
472 | ||
473 | /* Program the FM voice characteristics */ | |
474 | for (i = 0; i < (instr_4op ? 4 : 2); i++) { | |
475 | #ifdef DEBUG_MIDI | |
45203832 | 476 | snd_printk(KERN_DEBUG " --> programming operator %i\n", i); |
1da177e4 LT |
477 | #endif |
478 | op_offset = snd_opl3_regmap[voice_offset][i]; | |
479 | ||
480 | /* Set OPL3 AM_VIB register of requested voice/operator */ | |
481 | reg_val = fm->op[i].am_vib; | |
482 | opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); | |
483 | opl3->command(opl3, opl3_reg, reg_val); | |
484 | ||
485 | /* Set OPL3 KSL_LEVEL register of requested voice/operator */ | |
486 | reg_val = vol_op[i]; | |
487 | opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); | |
488 | opl3->command(opl3, opl3_reg, reg_val); | |
489 | ||
490 | /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ | |
491 | reg_val = fm->op[i].attack_decay; | |
492 | opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); | |
493 | opl3->command(opl3, opl3_reg, reg_val); | |
494 | ||
495 | /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ | |
496 | reg_val = fm->op[i].sustain_release; | |
497 | opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); | |
498 | opl3->command(opl3, opl3_reg, reg_val); | |
499 | ||
500 | /* Select waveform */ | |
501 | reg_val = fm->op[i].wave_select; | |
502 | opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); | |
503 | opl3->command(opl3, opl3_reg, reg_val); | |
504 | } | |
505 | ||
506 | /* Set operator feedback and 2op inter-operator connection */ | |
507 | reg_val = fm->feedback_connection[0]; | |
508 | /* Set output voice connection */ | |
509 | reg_val |= OPL3_STEREO_BITS; | |
510 | if (chan->gm_pan < 43) | |
511 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
512 | if (chan->gm_pan > 85) | |
513 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
514 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); | |
515 | opl3->command(opl3, opl3_reg, reg_val); | |
516 | ||
517 | if (instr_4op) { | |
518 | /* Set 4op inter-operator connection */ | |
519 | reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; | |
520 | /* Set output voice connection */ | |
521 | reg_val |= OPL3_STEREO_BITS; | |
522 | if (chan->gm_pan < 43) | |
523 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
524 | if (chan->gm_pan > 85) | |
525 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
526 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + | |
527 | voice_offset + 3); | |
528 | opl3->command(opl3, opl3_reg, reg_val); | |
529 | } | |
530 | ||
531 | /* | |
532 | * Special treatment of percussion notes for fm: | |
533 | * Requested pitch is really program, and pitch for | |
534 | * device is whatever was specified in the patch library. | |
535 | */ | |
536 | if (fm->fix_key) | |
537 | note = fm->fix_key; | |
538 | /* | |
539 | * use transpose if defined in patch library | |
540 | */ | |
541 | if (fm->trnsps) | |
542 | note += (fm->trnsps - 64); | |
543 | ||
544 | snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); | |
545 | ||
546 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
547 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
548 | opl3->command(opl3, opl3_reg, fnum); | |
549 | ||
550 | opl3->voices[voice].keyon_reg = blocknum; | |
551 | ||
552 | /* Set output sound flag */ | |
553 | blocknum |= OPL3_KEYON_BIT; | |
554 | ||
555 | #ifdef DEBUG_MIDI | |
45203832 | 556 | snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); |
1da177e4 LT |
557 | #endif |
558 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
559 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
560 | opl3->command(opl3, opl3_reg, blocknum); | |
561 | ||
562 | /* kill note after fixed duration (in centiseconds) */ | |
563 | if (fm->fix_dur) { | |
564 | opl3->voices[voice].note_off = jiffies + | |
565 | (fm->fix_dur * HZ) / 100; | |
566 | snd_opl3_start_timer(opl3); | |
567 | opl3->voices[voice].note_off_check = 1; | |
568 | } else | |
569 | opl3->voices[voice].note_off_check = 0; | |
570 | ||
571 | /* get extra pgm, but avoid possible loops */ | |
572 | extra_prg = (extra_prg) ? 0 : fm->modes; | |
573 | ||
1da177e4 LT |
574 | /* do the bookkeeping */ |
575 | vp->time = opl3->use_time++; | |
576 | vp->note = key; | |
577 | vp->chan = chan; | |
578 | ||
579 | if (instr_4op) { | |
580 | vp->state = SNDRV_OPL3_ST_ON_4OP; | |
581 | ||
582 | vp2 = &opl3->voices[voice + 3]; | |
583 | vp2->time = opl3->use_time++; | |
584 | vp2->note = key; | |
585 | vp2->chan = chan; | |
586 | vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; | |
587 | } else { | |
588 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
589 | /* 4op killed by 2op, release bounded voice */ | |
590 | vp2 = &opl3->voices[voice + 3]; | |
591 | vp2->time = opl3->use_time++; | |
592 | vp2->state = SNDRV_OPL3_ST_OFF; | |
593 | } | |
594 | vp->state = SNDRV_OPL3_ST_ON_2OP; | |
595 | } | |
596 | ||
597 | #ifdef DEBUG_ALLOC | |
598 | debug_alloc(opl3, "note on ", voice); | |
599 | #endif | |
600 | ||
601 | /* allocate extra program if specified in patch library */ | |
602 | if (extra_prg) { | |
603 | if (extra_prg > 128) { | |
224a0332 | 604 | bank = 128; |
1da177e4 | 605 | /* percussions start at 35 */ |
224a0332 | 606 | prg = extra_prg - 128 + 35 - 1; |
1da177e4 | 607 | } else { |
224a0332 TI |
608 | bank = 0; |
609 | prg = extra_prg - 1; | |
1da177e4 LT |
610 | } |
611 | #ifdef DEBUG_MIDI | |
45203832 | 612 | snd_printk(KERN_DEBUG " *** allocating extra program\n"); |
1da177e4 LT |
613 | #endif |
614 | goto __extra_prg; | |
615 | } | |
616 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
617 | } | |
618 | ||
5b1646a8 | 619 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
620 | { |
621 | unsigned short reg_side; | |
622 | unsigned char voice_offset; | |
623 | unsigned short opl3_reg; | |
624 | ||
5b1646a8 | 625 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 | 626 | |
5e246b85 TI |
627 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
628 | return; | |
1da177e4 LT |
629 | |
630 | vp = &opl3->voices[voice]; | |
631 | if (voice < MAX_OPL2_VOICES) { | |
632 | /* Left register block for voices 0 .. 8 */ | |
633 | reg_side = OPL3_LEFT; | |
634 | voice_offset = voice; | |
635 | } else { | |
636 | /* Right register block for voices 9 .. 17 */ | |
637 | reg_side = OPL3_RIGHT; | |
638 | voice_offset = voice - MAX_OPL2_VOICES; | |
639 | } | |
640 | ||
641 | /* kill voice */ | |
642 | #ifdef DEBUG_MIDI | |
45203832 | 643 | snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); |
1da177e4 LT |
644 | #endif |
645 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
646 | /* clear Key ON bit */ | |
647 | opl3->command(opl3, opl3_reg, vp->keyon_reg); | |
648 | ||
649 | /* do the bookkeeping */ | |
650 | vp->time = opl3->use_time++; | |
651 | ||
652 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
653 | vp2 = &opl3->voices[voice + 3]; | |
654 | ||
655 | vp2->time = opl3->use_time++; | |
656 | vp2->state = SNDRV_OPL3_ST_OFF; | |
657 | } | |
658 | vp->state = SNDRV_OPL3_ST_OFF; | |
659 | #ifdef DEBUG_ALLOC | |
660 | debug_alloc(opl3, "note off", voice); | |
661 | #endif | |
662 | ||
663 | } | |
664 | ||
665 | /* | |
666 | * Release a note in response to a midi note off. | |
667 | */ | |
8dce39b8 KH |
668 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
669 | struct snd_midi_channel *chan) | |
1da177e4 | 670 | { |
5b1646a8 | 671 | struct snd_opl3 *opl3; |
1da177e4 LT |
672 | |
673 | int voice; | |
5b1646a8 | 674 | struct snd_opl3_voice *vp; |
1da177e4 | 675 | |
1da177e4 LT |
676 | opl3 = p; |
677 | ||
678 | #ifdef DEBUG_MIDI | |
45203832 | 679 | snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", |
1da177e4 LT |
680 | chan->number, chan->midi_program, note); |
681 | #endif | |
682 | ||
1da177e4 LT |
683 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
684 | if (chan->drum_channel && use_internal_drums) { | |
685 | snd_opl3_drum_switch(opl3, note, vel, 0, chan); | |
1da177e4 LT |
686 | return; |
687 | } | |
688 | /* this loop will hopefully kill all extra voices, because | |
689 | they are grouped by the same channel and note values */ | |
690 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
691 | vp = &opl3->voices[voice]; | |
692 | if (vp->state > 0 && vp->chan == chan && vp->note == note) { | |
693 | snd_opl3_kill_voice(opl3, voice); | |
694 | } | |
695 | } | |
696 | } else { | |
697 | /* remap OSS voices */ | |
698 | if (chan->number < MAX_OPL3_VOICES) { | |
699 | voice = snd_opl3_oss_map[chan->number]; | |
700 | snd_opl3_kill_voice(opl3, voice); | |
701 | } | |
702 | } | |
8dce39b8 KH |
703 | } |
704 | ||
705 | void snd_opl3_note_off(void *p, int note, int vel, | |
706 | struct snd_midi_channel *chan) | |
707 | { | |
708 | struct snd_opl3 *opl3 = p; | |
709 | unsigned long flags; | |
710 | ||
711 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
712 | snd_opl3_note_off_unsafe(p, note, vel, chan); | |
1da177e4 LT |
713 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
714 | } | |
715 | ||
716 | /* | |
717 | * key pressure change | |
718 | */ | |
5b1646a8 | 719 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 720 | { |
1da177e4 | 721 | #ifdef DEBUG_MIDI |
45203832 | 722 | snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", |
1da177e4 LT |
723 | chan->number, chan->midi_program); |
724 | #endif | |
725 | } | |
726 | ||
727 | /* | |
728 | * terminate note | |
729 | */ | |
5b1646a8 | 730 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 731 | { |
1da177e4 | 732 | #ifdef DEBUG_MIDI |
45203832 | 733 | snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", |
1da177e4 LT |
734 | chan->number, chan->midi_program); |
735 | #endif | |
736 | } | |
737 | ||
5b1646a8 | 738 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
739 | { |
740 | unsigned short reg_side; | |
741 | unsigned char voice_offset; | |
742 | unsigned short opl3_reg; | |
743 | ||
744 | unsigned char fnum, blocknum; | |
745 | ||
5b1646a8 | 746 | struct snd_opl3_voice *vp; |
1da177e4 | 747 | |
5e246b85 TI |
748 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
749 | return; | |
1da177e4 LT |
750 | |
751 | vp = &opl3->voices[voice]; | |
752 | if (vp->chan == NULL) | |
753 | return; /* not allocated? */ | |
754 | ||
755 | if (voice < MAX_OPL2_VOICES) { | |
756 | /* Left register block for voices 0 .. 8 */ | |
757 | reg_side = OPL3_LEFT; | |
758 | voice_offset = voice; | |
759 | } else { | |
760 | /* Right register block for voices 9 .. 17 */ | |
761 | reg_side = OPL3_RIGHT; | |
762 | voice_offset = voice - MAX_OPL2_VOICES; | |
763 | } | |
764 | ||
765 | snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); | |
766 | ||
767 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
768 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
769 | opl3->command(opl3, opl3_reg, fnum); | |
770 | ||
771 | vp->keyon_reg = blocknum; | |
772 | ||
773 | /* Set output sound flag */ | |
774 | blocknum |= OPL3_KEYON_BIT; | |
775 | ||
776 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
777 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
778 | opl3->command(opl3, opl3_reg, blocknum); | |
779 | ||
780 | vp->time = opl3->use_time++; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Update voice pitch controller | |
785 | */ | |
5b1646a8 | 786 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
1da177e4 LT |
787 | { |
788 | int voice; | |
5b1646a8 | 789 | struct snd_opl3_voice *vp; |
1da177e4 LT |
790 | |
791 | unsigned long flags; | |
792 | ||
793 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
794 | ||
795 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
796 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
797 | vp = &opl3->voices[voice]; | |
798 | if (vp->state > 0 && vp->chan == chan) { | |
799 | snd_opl3_update_pitch(opl3, voice); | |
800 | } | |
801 | } | |
802 | } else { | |
803 | /* remap OSS voices */ | |
804 | if (chan->number < MAX_OPL3_VOICES) { | |
805 | voice = snd_opl3_oss_map[chan->number]; | |
806 | snd_opl3_update_pitch(opl3, voice); | |
807 | } | |
808 | } | |
809 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
810 | } | |
811 | ||
812 | /* | |
3a4fa0a2 | 813 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
814 | * control events, not just the midi controllers |
815 | */ | |
5b1646a8 | 816 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 817 | { |
5b1646a8 | 818 | struct snd_opl3 *opl3; |
1da177e4 LT |
819 | |
820 | opl3 = p; | |
821 | #ifdef DEBUG_MIDI | |
45203832 | 822 | snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", |
1da177e4 LT |
823 | type, chan->number, chan->midi_program); |
824 | #endif | |
825 | ||
826 | switch (type) { | |
827 | case MIDI_CTL_MSB_MODWHEEL: | |
828 | if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) | |
829 | opl3->drum_reg |= OPL3_VIBRATO_DEPTH; | |
830 | else | |
831 | opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; | |
832 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
833 | opl3->drum_reg); | |
834 | break; | |
835 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
836 | if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) | |
837 | opl3->drum_reg |= OPL3_TREMOLO_DEPTH; | |
838 | else | |
839 | opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; | |
840 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
841 | opl3->drum_reg); | |
842 | break; | |
843 | case MIDI_CTL_PITCHBEND: | |
844 | snd_opl3_pitch_ctrl(opl3, chan); | |
845 | break; | |
846 | } | |
847 | } | |
848 | ||
849 | /* | |
850 | * NRPN events | |
851 | */ | |
5b1646a8 TI |
852 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
853 | struct snd_midi_channel_set *chset) | |
1da177e4 | 854 | { |
1da177e4 | 855 | #ifdef DEBUG_MIDI |
45203832 | 856 | snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", |
1da177e4 LT |
857 | chan->number, chan->midi_program); |
858 | #endif | |
859 | } | |
860 | ||
861 | /* | |
862 | * receive sysex | |
863 | */ | |
864 | void snd_opl3_sysex(void *p, unsigned char *buf, int len, | |
5b1646a8 | 865 | int parsed, struct snd_midi_channel_set *chset) |
1da177e4 | 866 | { |
1da177e4 | 867 | #ifdef DEBUG_MIDI |
45203832 | 868 | snd_printk(KERN_DEBUG "SYSEX\n"); |
1da177e4 LT |
869 | #endif |
870 | } |