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 bool use_internal_drums; 31 32 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 33 struct snd_midi_channel *chan); 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 44 static 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 64 void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 65 struct snd_midi_channel *chan) 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 */ 90 static 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 97 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 98 int note, struct snd_midi_channel *chan) 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 126 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { 127 int i; 128 char *str = "x.24"; 129 130 printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); 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 */ 140 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, 141 struct snd_midi_channel *chan) { 142 int chan_4op_1; /* first voice for 4op instrument */ 143 int chan_4op_2; /* second voice for 4op instrument */ 144 145 struct snd_opl3_voice *vp, *vp2; 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++) { 166 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ 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 223 printk(KERN_DEBUG "%s %iop allocation on voice %i\n", 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 */ 239 void snd_opl3_timer_func(unsigned long data) 240 { 241 242 struct snd_opl3 *opl3 = (struct snd_opl3 *)data; 243 unsigned long flags; 244 int again = 0; 245 int i; 246 247 spin_lock_irqsave(&opl3->voice_lock, flags); 248 for (i = 0; i < opl3->max_voices; i++) { 249 struct snd_opl3_voice *vp = &opl3->voices[i]; 250 if (vp->state > 0 && vp->note_off_check) { 251 if (vp->note_off == jiffies) 252 snd_opl3_note_off_unsafe(opl3, vp->note, 0, 253 vp->chan); 254 else 255 again++; 256 } 257 } 258 spin_unlock_irqrestore(&opl3->voice_lock, flags); 259 260 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 261 if (again) 262 mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ 263 else 264 opl3->sys_timer_status = 0; 265 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 266 } 267 268 /* 269 * Start system timer 270 */ 271 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 272 { 273 unsigned long flags; 274 spin_lock_irqsave(&opl3->sys_timer_lock, flags); 275 if (! opl3->sys_timer_status) { 276 mod_timer(&opl3->tlist, jiffies + 1); 277 opl3->sys_timer_status = 1; 278 } 279 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); 280 } 281 282 /* ------------------------------ */ 283 284 285 static 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 */ 292 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 293 { 294 struct snd_opl3 *opl3; 295 int instr_4op; 296 297 int voice; 298 struct snd_opl3_voice *vp, *vp2; 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; 310 unsigned char prg, bank; 311 312 int key = note; 313 unsigned char fnum, blocknum; 314 int i; 315 316 struct fm_patch *patch; 317 struct fm_instrument *fm; 318 unsigned long flags; 319 320 opl3 = p; 321 322 #ifdef DEBUG_MIDI 323 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", 324 chan->number, chan->midi_program, note, vel); 325 #endif 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 */ 332 bank = 128; 333 prg = note; 334 } else { 335 bank = chan->gm_bank_select; 336 prg = chan->midi_program; 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 */ 344 bank = 127; 345 prg = chan->midi_program; 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: 357 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 358 if (!patch) { 359 spin_unlock_irqrestore(&opl3->voice_lock, flags); 360 return; 361 } 362 363 fm = &patch->inst; 364 switch (patch->type) { 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: 374 spin_unlock_irqrestore(&opl3->voice_lock, flags); 375 return; 376 } 377 #ifdef DEBUG_MIDI 378 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", 379 instr_4op ? 3 : 2, patch->name); 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 } 389 390 if (voice < 0) { 391 spin_unlock_irqrestore(&opl3->voice_lock, flags); 392 return; 393 } 394 395 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 442 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", 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 477 snd_printk(KERN_DEBUG " --> programming operator %i\n", i); 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 557 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); 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; 574 575 /* 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) { 605 bank = 128; 606 /* percussions start at 35 */ 607 prg = extra_prg - 128 + 35 - 1; 608 } else { 609 bank = 0; 610 prg = extra_prg - 1; 611 } 612 #ifdef DEBUG_MIDI 613 snd_printk(KERN_DEBUG " *** allocating extra program\n"); 614 #endif 615 goto __extra_prg; 616 } 617 spin_unlock_irqrestore(&opl3->voice_lock, flags); 618 } 619 620 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 621 { 622 unsigned short reg_side; 623 unsigned char voice_offset; 624 unsigned short opl3_reg; 625 626 struct snd_opl3_voice *vp, *vp2; 627 628 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 629 return; 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 644 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); 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 */ 669 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 670 struct snd_midi_channel *chan) 671 { 672 struct snd_opl3 *opl3; 673 674 int voice; 675 struct snd_opl3_voice *vp; 676 677 opl3 = p; 678 679 #ifdef DEBUG_MIDI 680 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", 681 chan->number, chan->midi_program, note); 682 #endif 683 684 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); 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 } 704 } 705 706 void 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); 714 spin_unlock_irqrestore(&opl3->voice_lock, flags); 715 } 716 717 /* 718 * key pressure change 719 */ 720 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 721 { 722 struct snd_opl3 *opl3; 723 724 opl3 = p; 725 #ifdef DEBUG_MIDI 726 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", 727 chan->number, chan->midi_program); 728 #endif 729 } 730 731 /* 732 * terminate note 733 */ 734 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 735 { 736 struct snd_opl3 *opl3; 737 738 opl3 = p; 739 #ifdef DEBUG_MIDI 740 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", 741 chan->number, chan->midi_program); 742 #endif 743 } 744 745 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 746 { 747 unsigned short reg_side; 748 unsigned char voice_offset; 749 unsigned short opl3_reg; 750 751 unsigned char fnum, blocknum; 752 753 struct snd_opl3_voice *vp; 754 755 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 756 return; 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 */ 793 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 794 { 795 int voice; 796 struct snd_opl3_voice *vp; 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 /* 820 * Deal with a controller type event. This includes all types of 821 * control events, not just the midi controllers 822 */ 823 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 824 { 825 struct snd_opl3 *opl3; 826 827 opl3 = p; 828 #ifdef DEBUG_MIDI 829 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 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 */ 859 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 860 struct snd_midi_channel_set *chset) 861 { 862 struct snd_opl3 *opl3; 863 864 opl3 = p; 865 #ifdef DEBUG_MIDI 866 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", 867 chan->number, chan->midi_program); 868 #endif 869 } 870 871 /* 872 * receive sysex 873 */ 874 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 875 int parsed, struct snd_midi_channel_set *chset) 876 { 877 struct snd_opl3 *opl3; 878 879 opl3 = p; 880 #ifdef DEBUG_MIDI 881 snd_printk(KERN_DEBUG "SYSEX\n"); 882 #endif 883 } 884