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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 | ||
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, | |
5b1646a8 | 63 | struct snd_midi_channel *chan) |
1da177e4 LT |
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, | |
5b1646a8 | 96 | int note, struct snd_midi_channel *chan) |
1da177e4 LT |
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 | |
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 | ||
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 | */ | |
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++) { | |
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 | ||
5b1646a8 | 240 | struct snd_opl3 *opl3 = (struct snd_opl3 *)data; |
b32425ac | 241 | unsigned long flags; |
1da177e4 LT |
242 | int again = 0; |
243 | int i; | |
244 | ||
b32425ac | 245 | spin_lock_irqsave(&opl3->sys_timer_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) | |
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 | } | |
b32425ac | 261 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
1da177e4 LT |
262 | } |
263 | ||
264 | /* | |
265 | * Start system timer | |
266 | */ | |
5b1646a8 | 267 | static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
1da177e4 LT |
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 | */ | |
5b1646a8 | 289 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 290 | { |
5b1646a8 | 291 | struct snd_opl3 *opl3; |
1da177e4 LT |
292 | int instr_4op; |
293 | ||
294 | int voice; | |
5b1646a8 | 295 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
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; | |
224a0332 | 307 | unsigned char prg, bank; |
1da177e4 LT |
308 | |
309 | int key = note; | |
310 | unsigned char fnum, blocknum; | |
311 | int i; | |
312 | ||
224a0332 | 313 | struct fm_patch *patch; |
5b1646a8 | 314 | struct fm_instrument *fm; |
1da177e4 LT |
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 | |
1da177e4 LT |
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 */ | |
224a0332 TI |
329 | bank = 128; |
330 | prg = note; | |
1da177e4 | 331 | } else { |
224a0332 TI |
332 | bank = chan->gm_bank_select; |
333 | prg = chan->midi_program; | |
1da177e4 LT |
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 */ | |
224a0332 TI |
341 | bank = 127; |
342 | prg = chan->midi_program; | |
1da177e4 LT |
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: | |
224a0332 TI |
354 | patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
355 | if (!patch) { | |
1da177e4 LT |
356 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
357 | return; | |
358 | } | |
359 | ||
224a0332 TI |
360 | fm = &patch->inst; |
361 | switch (patch->type) { | |
1da177e4 LT |
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: | |
1da177e4 LT |
371 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
372 | return; | |
373 | } | |
1da177e4 LT |
374 | #ifdef DEBUG_MIDI |
375 | snd_printk(" --> OPL%i instrument: %s\n", | |
224a0332 | 376 | instr_4op ? 3 : 2, patch->name); |
1da177e4 LT |
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 | ||
1da177e4 LT |
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) { | |
224a0332 | 597 | bank = 128; |
1da177e4 | 598 | /* percussions start at 35 */ |
224a0332 | 599 | prg = extra_prg - 128 + 35 - 1; |
1da177e4 | 600 | } else { |
224a0332 TI |
601 | bank = 0; |
602 | prg = extra_prg - 1; | |
1da177e4 LT |
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 | ||
5b1646a8 | 612 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
613 | { |
614 | unsigned short reg_side; | |
615 | unsigned char voice_offset; | |
616 | unsigned short opl3_reg; | |
617 | ||
5b1646a8 | 618 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
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 | */ | |
5b1646a8 | 660 | void snd_opl3_note_off(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 661 | { |
5b1646a8 | 662 | struct snd_opl3 *opl3; |
1da177e4 LT |
663 | |
664 | int voice; | |
5b1646a8 | 665 | struct snd_opl3_voice *vp; |
1da177e4 LT |
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 | */ | |
5b1646a8 | 705 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 706 | { |
5b1646a8 | 707 | struct snd_opl3 *opl3; |
1da177e4 LT |
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 | */ | |
5b1646a8 | 719 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 720 | { |
5b1646a8 | 721 | struct snd_opl3 *opl3; |
1da177e4 LT |
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 | ||
5b1646a8 | 730 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
731 | { |
732 | unsigned short reg_side; | |
733 | unsigned char voice_offset; | |
734 | unsigned short opl3_reg; | |
735 | ||
736 | unsigned char fnum, blocknum; | |
737 | ||
5b1646a8 | 738 | struct snd_opl3_voice *vp; |
1da177e4 LT |
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 | */ | |
5b1646a8 | 777 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
1da177e4 LT |
778 | { |
779 | int voice; | |
5b1646a8 | 780 | struct snd_opl3_voice *vp; |
1da177e4 LT |
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 | /* | |
3a4fa0a2 | 804 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
805 | * control events, not just the midi controllers |
806 | */ | |
5b1646a8 | 807 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 808 | { |
5b1646a8 | 809 | struct snd_opl3 *opl3; |
1da177e4 LT |
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 | */ | |
5b1646a8 TI |
843 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
844 | struct snd_midi_channel_set *chset) | |
1da177e4 | 845 | { |
5b1646a8 | 846 | struct snd_opl3 *opl3; |
1da177e4 LT |
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, | |
5b1646a8 | 859 | int parsed, struct snd_midi_channel_set *chset) |
1da177e4 | 860 | { |
5b1646a8 | 861 | struct snd_opl3 *opl3; |
1da177e4 LT |
862 | |
863 | opl3 = p; | |
864 | #ifdef DEBUG_MIDI | |
865 | snd_printk("SYSEX\n"); | |
866 | #endif | |
867 | } |